CN118087553A - Double-row miniature pile foundation pit supporting structure and construction method - Google Patents
Double-row miniature pile foundation pit supporting structure and construction method Download PDFInfo
- Publication number
- CN118087553A CN118087553A CN202410486687.8A CN202410486687A CN118087553A CN 118087553 A CN118087553 A CN 118087553A CN 202410486687 A CN202410486687 A CN 202410486687A CN 118087553 A CN118087553 A CN 118087553A
- Authority
- CN
- China
- Prior art keywords
- foundation pit
- piles
- row
- micro
- steel pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010276 construction Methods 0.000 title claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 104
- 239000010959 steel Substances 0.000 claims abstract description 104
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 50
- 239000002689 soil Substances 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 24
- 239000004568 cement Substances 0.000 claims description 13
- 238000005553 drilling Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 claims description 6
- 239000002002 slurry Substances 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 27
- 101150054854 POU1F1 gene Proteins 0.000 description 12
- 239000002131 composite material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/24—Prefabricated piles
- E02D5/28—Prefabricated piles made of steel or other metals
- E02D5/285—Prefabricated piles made of steel or other metals tubular, e.g. prefabricated from sheet pile elements
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
- E02D5/76—Anchorings for bulkheads or sections thereof in as much as specially adapted therefor
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention belongs to the technical field of foundation pit support, and particularly relates to a double-row miniature pile foundation pit support structure and a construction method thereof, wherein two rows of miniature steel pipe piles are sequentially arranged at the outer edge of a foundation pit, and the two rows of miniature steel pipe piles are respectively a front row of miniature piles and a rear row of miniature piles; the upper ends of the front row of micro piles and the rear row of micro piles are connected through a connecting part; the side wall of the foundation pit is provided with a concrete panel layer, the concrete panel layer comprises a reinforcing mesh, and the reinforcing mesh is connected with the front row of micro piles through connecting pieces; compared with the prior art, the invention has the beneficial effects that: (1) Compared with the soil nailing wall supporting structure, the double-row miniature pile foundation pit supporting structure provided by the invention has the advantages that the occupied space is small, and the influence on the surrounding environment is small; (2) The double-row micro piles play a role in retaining soil, the double-row micro piles are connected into a whole through the crown Liang Jilian beam, the whole resists the water and soil pressure of the foundation pit and the side slope, and the concrete panel layer protects the slope.
Description
Technical Field
The invention belongs to the technical field of foundation pit support, and particularly relates to a double-row miniature pile foundation pit support structure and a construction method.
Background
The foundation pit supporting engineering worker usually adopts a soil nailing wall for supporting, and the soil nailing wall is an in-situ soil body reinforcement technology. The foundation pit side slope is reinforced by soil nails made of steel bars, a steel bar net is paved on the side slope surface, and then a layer of concrete surface layer and the earth side slope are sprayed to combine. The composite structure is composed of a composite body formed by firmly bonding a reinforced rod piece (namely soil nails or anchor rods) arranged in a slope body and soil bodies around the reinforced rod piece and a supporting structure similar to a gravity retaining wall, wherein the supporting structure is composed of a surface layer. The conventional soil nailing wall supporting structure occupies a large space, is influenced by the surrounding environment and has large influence on the surrounding environment.
Disclosure of Invention
Aiming at the problems, the invention provides a double-row miniature pile foundation pit supporting structure and a construction method.
In order to achieve the above purpose, the technical scheme of the invention is as follows: two rows of miniature steel pipe piles are sequentially arranged on the outer edge of the foundation pit of the double-row miniature pile foundation pit supporting structure, and the two rows of miniature steel pipe piles are respectively a front row of miniature piles and a rear row of miniature piles; the upper ends of the front row of micro piles and the rear row of micro piles are connected through a connecting part;
the foundation pit side wall is provided with a concrete panel layer, the concrete panel layer comprises a reinforcing mesh, and the reinforcing mesh is connected with the front row of micro piles through connecting pieces.
Preferably, the front row of mini piles comprise a plurality of mini steel pipe piles, and each mini steel pipe pile comprises a center steel pipe I and a cement slurry layer I; the rear row of miniature piles also comprises a plurality of miniature steel pipe piles, and each miniature steel pipe pile comprises a center steel pipe II and a cement slurry layer II.
Preferably, the connecting piece comprises a pipe clamp, a reinforcing steel sleeve and a reinforcing rib; the pipe clamp is detachably connected to the periphery of the first central steel pipe, the steel bar sleeve is fixedly connected with the pipe clamp, and the steel bar sleeve is positioned on one side, close to the foundation pit, of the first central steel pipe; one end of the reinforcing rib is in threaded connection with the reinforcing sleeve, and the other end of the reinforcing rib is fixedly connected with the reinforcing mesh.
Preferably, the lower ends of the front row of micro piles and the rear row of micro piles are lower than the bottom surface of the foundation pit; the plurality of pipe clamps are distributed along the outer Zhou Junheng of the first center steel pipe and above the bottom surface of the foundation pit.
Preferably, the connecting part comprises a crown beam and a connecting beam; the crown beam comprises a crown beam I and a crown beam II; the crown beam I comprises two channel steel and a plurality of connecting ribs I; the crown Liang Erbao comprises two channel steels and a plurality of second connecting ribs; the two channel steels of the crown beam I are symmetrically arranged at two sides of the upper end of the front row of micro piles, the connecting ribs I are uniformly distributed along the length direction of the channel steels, and the connecting ribs I are fixedly connected with the two channel steels of the crown beam I and the central steel pipe I of the front row of micro piles; the second connecting ribs are fixedly connected with the second channel steel of the crown beam and the second central steel pipe of the rear row of mini piles; the connecting beams are uniformly distributed along the length direction of the channel steel, and are fixedly connected with the crown beam I and the crown beam II.
Preferably, the concrete panel layer comprises two layers of reinforcing steel meshes, each layer of reinforcing steel mesh comprises transverse lacing wires, and the transverse lacing wires are welded with the end parts of the reinforcing ribs of the connecting piece.
Preferably, a water retaining wall is fixedly connected above the connecting part, and a protective railing is arranged above the water retaining wall.
Preferably, a drain pipe is arranged below the connecting part and close to the bottom surface of the foundation pit, and the drain pipe is wrapped with a filter screen; and a slope roof drainage ditch is formed on one side, far away from the foundation pit, of the connecting part.
The construction method of the double-row miniature pile foundation pit supporting structure comprises the following steps:
Step one, before excavation of a foundation pit, constructing two rows of miniature steel pipe piles on a stable soil body; the construction process comprises the steps of leveling a site, grouting steel pipes, measuring and paying off, positioning hole distances, drilling by a drilling machine, cleaning holes, installing grouting machines, installing a first central steel pipe and a second central steel pipe, installing grouting steel pipes, stirring cement paste, grouting cement paste, carrying out secondary pressurizing grouting, carrying out tertiary pressurizing grouting, and carrying out upper opening grouting; before the first central steel pipe is lowered, a pipe clamp fixedly connected with a reinforcing steel bar sleeve is arranged on the periphery of the first central steel pipe, and soft objects are filled in the reinforcing steel bar sleeve;
The upper ends of the front row of micro piles and the rear row of micro piles are connected through a connecting part;
Thirdly, excavating a foundation pit, wherein one side of the front row of micro piles close to the foundation pit is exposed, taking out soft objects filled in the reinforcing steel bar sleeve, and then connecting one end of the reinforcing rib with the reinforcing steel bar sleeve in a threaded manner;
installing a reinforcing mesh, wherein transverse lacing wires in the reinforcing mesh are welded with the end parts of the reinforcing ribs of the connecting piece;
pouring a concrete panel layer, wherein the concrete panel layer comprises a reinforcing mesh;
step six, constructing a water retaining wall and a protective railing above the connecting part; and excavating a slope roof drainage ditch at one side of the connecting part away from the foundation pit.
Preferably, the fourth step further comprises a drain pipe installed below the connecting part and close to the bottom surface of the foundation pit.
Compared with the prior art, the invention has the advantages and positive effects that:
(1) Compared with the soil nailing wall supporting structure, the double-row miniature pile foundation pit supporting structure provided by the invention has the advantages that the occupied space is small, and the influence on the surrounding environment is small;
(2) The miniature steel pipe piles are connected by adopting a crown beam, the miniature steel pipe pile rows are connected by adopting a connecting beam, the reinforcing mesh of the concrete panel layer is connected with the miniature piles of the front row by adopting a connecting piece, and the stability of a foundation pit and a side slope is ensured by utilizing a supporting structure formed by combining the miniature piles of the double rows, the crown beam, the connecting beam and the concrete panel layer;
(3) The connecting piece comprises a pipe clamp, a reinforcing steel bar sleeve and reinforcing ribs, wherein the pipe clamp is detachably connected to the periphery of the first central steel pipe, the reinforcing steel bar sleeve is fixedly connected with the pipe clamp, and the reinforcing steel bar sleeve is positioned on one side, close to the foundation pit, of the first central steel pipe; one end of the reinforcing rib is in threaded connection with the reinforcing sleeve, and the other end of the reinforcing rib is fixedly connected with the reinforcing mesh;
(4) The double-row micro piles play a role in retaining soil, the double-row micro piles are connected into a whole through the crown Liang Jilian beam, the whole resists the water and soil pressure of the foundation pit and the side slope, and the concrete panel layer protects the slope.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present invention, the following description of the embodiments will briefly describe the drawings that are required to be used in the description:
FIG. 1 is a schematic view of a foundation pit supporting structure with double rows of micro piles;
FIG. 2 is a schematic diagram of the connection of the upper ends of the front row of micropositioned and the rear row of micropositioned by a connecting part;
FIG. 3 is a schematic view of a miniature steel pipe pile of a front row of miniature piles;
Fig. 4 is a schematic diagram of the connection of the reinforcing mesh with the front row of mini piles through the connecting pieces;
Fig. 5 is a schematic view of the structure of a reinforcing mesh within a concrete panel.
Reference numerals illustrate:
1-foundation pit, 2-rear row of mini piles;
3-front row micro piles, 31-a first central steel pipe, 32-a first cement slurry layer;
4-concrete panel layers, 5-connecting parts, 6-water retaining walls, 7-slope roof drainage ditches and 8-stable soil bodies;
9-drain pipes, 10-channel steel, 11-connecting beams, 12-connecting ribs I, 13-connecting ribs II, 14-connecting pieces, 15-transverse lacing wires and 16-reinforcing steel meshes.
Detailed Description
In order that the above objects, features and advantages of the invention will be more clearly understood, a further description of the invention will be rendered by reference to the appended drawings and examples.
Example 1
As shown in fig. 1, two rows of miniature steel pipe piles are sequentially arranged on the outer edge of a foundation pit 1 of a double-row miniature pile foundation pit supporting structure, wherein the two rows of miniature steel pipe piles are respectively a front row of miniature piles 3 and a rear row of miniature piles 2. The upper ends of the front row of micro-piles 3 and the rear row of micro-piles 2 are connected through a connecting part 5.
As shown in fig. 1, the side wall of the foundation pit 1 is provided with a concrete panel layer 4, the concrete panel layer 4 contains a reinforcing mesh 16, and the reinforcing mesh 16 is connected with the front row of micro piles 3 through connecting pieces 14.
As shown in FIG. 3, the front row of micro piles 3 comprises a plurality of micro steel pipe piles (150-250 mm holes) each comprising a central steel pipe one 31 (phi 108-217 mm) and a cement paste layer one 32. In this embodiment, the pile diameter of the miniature steel pipe pile is 150 mm, and the first center steel pipe 31 is a steel pipe with a diameter of 121 mm. The rear row of mini piles 2 also comprises a plurality of mini steel pipe piles, and each mini steel pipe pile comprises a center steel pipe II and a cement slurry layer II.
As shown in fig. 4, the coupling 14 includes a pipe clamp, a reinforcing sleeve, and a reinforcing bar. The pipe clamp is detachably connected to the periphery of the first central steel pipe 31, the steel bar sleeve is fixedly connected with the pipe clamp, and the steel bar sleeve is located on one side, close to the foundation pit 1, of the first central steel pipe 31. One end of the reinforcing rib is in threaded connection with the reinforcing sleeve, and the other end of the reinforcing rib is fixedly connected with the reinforcing mesh 16.
As shown in fig. 1, the lower ends of the front row of micropositions 3 and the rear row of micropositions 2 are lower than the bottom surface of the foundation pit 1. The plurality of pipe clamps are distributed along the outer Zhou Junheng of the center steel pipe one 31 and are above the bottom surface of the foundation pit 1.
As shown in fig. 2, the connection 5 includes a crown beam and a connecting beam 11. The crown beam comprises a crown beam I and a crown beam II. The crown bar one comprises two channel steel 10 and a plurality of connecting ribs one 12. The second crown beam comprises two channel steel 10 and a plurality of second connecting ribs 13.
As shown in fig. 2, two channel steels 10 of the crown beam one are symmetrically arranged at two sides of the upper end of the front row of micro piles 3, a plurality of connecting ribs one 12 are uniformly distributed along the length direction of the channel steels 10, and the plurality of connecting ribs one 12 are fixedly connected with the two channel steels 10 of the crown beam one and a central steel pipe one 31 of the front row of micro piles 3.
As shown in fig. 2, two channel steels 10 of the crown beam two are symmetrically arranged at two sides of the upper end of the rear row of mini piles 2, a plurality of connecting ribs two 13 are uniformly distributed along the length direction of the channel steels 10, and the plurality of connecting ribs two 13 are fixedly connected with the two channel steels 10 of the crown beam two and the central steel pipe two of the rear row of mini piles 2.
The plurality of connecting beams 11 (also adopting channel steel) are uniformly distributed along the length direction of the channel steel 10, and the plurality of connecting beams 11 are fixedly connected with the crown beam I and the crown beam II.
As shown in fig. 4 and 5, the concrete panel layer 4 includes two layers of reinforcing steel meshes 16, and each layer of reinforcing steel mesh 16 includes a transverse tie 15, and the transverse tie 15 is welded with the end of the reinforcing rib of the connecting piece 14.
As shown in fig. 1, a water-retaining wall 6 is fixedly connected above the connecting portion 5, and a protective rail is installed above the water-retaining wall 6.
As shown in fig. 1, a drain pipe 9 is installed below the connecting part 5 and close to the bottom surface of the foundation pit 1, and the drain pipe 9 is wrapped with a filter screen. The side of the connecting part 5, which is far away from the foundation pit 1, is provided with a slope roof drainage ditch 7. The drain pipe 9 with the length of 500mm and the diameter of 75mm is inserted into the back of the concrete panel layer 4, the outside inclination is 5%, the open hole is a hole with the diameter of more than 10mm, the porosity is more than 25%, the outer end of the drain pipe extends out of the concrete panel layer 4, and the interval is 3m, so that accumulated water behind the concrete panel layer 4 is discharged. In order to remove water seepage and rainwater accumulated in the foundation pit, a drainage ditch and a water collecting pit are arranged at the pit bottom.
The construction method of the double-row miniature pile foundation pit supporting structure comprises the following steps:
Firstly, before the foundation pit 1 is excavated, constructing two rows of miniature steel pipe piles on a stable soil body 8; the construction process comprises the steps of leveling a site, manufacturing grouting steel pipes, measuring and paying off, positioning hole distances, drilling by a drilling machine, cleaning holes, installing grouting machines, installing a first central steel pipe 31 and a second central steel pipe, installing grouting steel pipes, stirring cement paste, grouting cement paste, carrying out secondary pressurizing grouting, carrying out tertiary pressurizing grouting, and carrying out upper opening grouting; before the first central steel pipe 31 is lowered, a pipe clamp fixedly connected with a reinforcing steel bar sleeve is arranged on the periphery of the first central steel pipe 31, and soft objects are filled in the reinforcing steel bar sleeve;
The upper ends of the front row of micro piles 3 and the rear row of micro piles 2 are connected through a connecting part 5;
thirdly, excavating a foundation pit 1, exposing one side of a front row of micro piles 3 close to the foundation pit 1, taking out soft objects filled in the reinforcing steel bar sleeve, and connecting one end of a reinforcing rib with the reinforcing steel bar sleeve in a threaded manner;
Step four, installing a reinforcing mesh 16, wherein transverse tie bars 15 in the reinforcing mesh 16 are welded with the reinforcing bar ends of the connecting pieces 14;
Pouring a concrete panel layer 4, wherein the concrete panel layer 4 comprises a reinforcing mesh 16;
step six, constructing a water retaining wall 6 and a protective railing above the connecting part 5; and excavating a slope roof drainage ditch 7 at one side of the connecting part 5 away from the foundation pit 1.
And step four, a drain pipe 9 is arranged below the connecting part 5 and close to the bottom surface of the foundation pit 1.
The construction cost of the conventional soil nailing wall support pile structure is high, the occupied construction space is large, and construction cannot be performed in a small space. The mud is required to be discharged in the hole forming process of the support pile, the discharge amount is large, the mud is required to be transported to a dregs field to be treated by special equipment, the leakage is easy in the transportation process, and the environmental impact is large; the double-row miniature pile supporting structure has low manufacturing cost and small occupied construction space, can be constructed in a small space, does not discharge slurry in the pore-forming process, has less discharged soil body, can be directly utilized, and does not influence the environment.
The present invention is not limited to the above embodiments, and any equivalent embodiments which can be changed or modified by the technical content disclosed above can be applied to other fields, but any simple modification and equivalent changes to the above embodiments according to the technical substance of the present invention are still within the scope of the technical solution of the present invention.
Claims (10)
1. The foundation pit supporting structure with the double rows of micro piles is characterized in that two rows of micro steel pipe piles are sequentially arranged on the outer edge of a foundation pit (1), and the two rows of micro steel pipe piles are respectively a front row of micro piles (3) and a rear row of micro piles (2); the upper ends of the front row of micro piles (3) and the rear row of micro piles (2) are connected through a connecting part (5);
The side wall of the foundation pit (1) is provided with a concrete panel layer (4), a reinforcing mesh (16) is contained in the concrete panel layer (4), and the reinforcing mesh (16) is connected with the front row of mini piles (3) through connecting pieces (14).
2. The double-row micro pile foundation pit supporting structure according to claim 1, wherein the front row micro pile (3) comprises a plurality of micro steel pipe piles, each micro steel pipe pile comprises a central steel pipe one (31) and a cement paste layer one (32); the rear row of mini piles (2) also comprises a plurality of mini steel pipe piles, and each mini steel pipe pile comprises a center steel pipe II and a cement slurry layer II.
3. The double row mini pile foundation pit supporting structure according to claim 2, wherein the connecting member (14) comprises a pipe clamp, a reinforcing sleeve and a reinforcing rib; the pipe clamp is detachably connected to the periphery of the first central steel pipe (31), the steel bar sleeve is fixedly connected with the pipe clamp, and the steel bar sleeve is positioned on one side, close to the foundation pit (1), of the first central steel pipe (31); one end of the reinforcing rib is in threaded connection with the reinforcing sleeve, and the other end of the reinforcing rib is fixedly connected with the reinforcing mesh (16).
4. A double-row micro pile foundation pit supporting structure according to claim 3, wherein the lower ends of the front row micro piles (3) and the rear row micro piles (2) are lower than the bottom surface of the foundation pit (1); the plurality of pipe clamps are distributed along the outer Zhou Junheng of the first central steel pipe (31) and are located above the bottom surface of the foundation pit (1).
5. The double row mini pile foundation pit supporting structure according to claim 4, wherein the connecting portion (5) comprises a crown beam and a connecting beam (11); the crown beam comprises a crown beam I and a crown beam II; the first crown beam comprises two channel steels (10) and a plurality of first connecting ribs (12); the crown Liang Erbao comprises two channel steels (10) and a plurality of connecting ribs II (13);
The two channel steels (10) of the crown beam I are symmetrically arranged at two sides of the upper end of the front row of micro piles (3), the connecting ribs I (12) are uniformly distributed along the length direction of the channel steels (10), and the connecting ribs I (12) are fixedly connected with the two channel steels (10) of the crown beam I and the central steel pipe I (31) of the front row of micro piles (3);
two channel steels (10) of the crown beam II are symmetrically arranged at two sides of the upper end of the rear row of micro piles (2), a plurality of connecting ribs II (13) are uniformly distributed along the length direction of the channel steels (10), and the connecting ribs II (13) are fixedly connected with the two channel steels (10) of the crown beam II and the center steel pipe II of the rear row of micro piles (2);
the connecting beams (11) are uniformly distributed along the length direction of the channel steel (10), and the connecting beams (11) are fixedly connected with the first crown beam and the second crown beam.
6. The double-row mini-pile foundation pit supporting structure according to claim 5, wherein the concrete panel layer (4) comprises two layers of reinforcing steel meshes (16), each layer of reinforcing steel mesh (16) comprises transverse lacing wires (15), and the transverse lacing wires (15) are welded with the reinforcing rib ends of the connecting pieces (14).
7. The double-row mini pile foundation pit supporting structure according to claim 6, wherein a water retaining wall (6) is fixedly connected above the connecting portion (5), and a protective railing is installed above the water retaining wall (6).
8. The double-row micro pile foundation pit supporting structure according to claim 7, wherein a drain pipe (9) is installed below the connecting part (5) and close to the bottom surface of the foundation pit (1), and the drain pipe (9) is externally covered with a filter screen; and a slope top drainage ditch (7) is formed in one side, far away from the foundation pit (1), of the connecting part (5).
9. The construction method of the double-row micro pile foundation pit supporting structure is characterized in that the construction method of the double-row micro pile foundation pit supporting structure in claim 8 comprises the following steps:
Firstly, before the foundation pit (1) is excavated, constructing two rows of miniature steel pipe piles on a stable soil body (8); the construction process comprises the steps of leveling a site, manufacturing grouting steel pipes, measuring and paying off, positioning hole distances, drilling by a drilling machine, cleaning holes, installing grouting machines, installing a first (31) and a second (31) central steel pipe, installing grouting steel pipes, stirring cement paste, grouting cement paste, carrying out secondary pressurizing grouting, carrying out tertiary pressurizing grouting, and carrying out upper grouting; before the first central steel pipe (31) is lowered, a pipe clamp fixedly connected with a reinforcing steel bar sleeve is arranged on the periphery of the first central steel pipe (31), and soft objects are filled in the reinforcing steel bar sleeve;
The upper ends of the front row of micro piles (3) and the rear row of micro piles (2) are connected through a connecting part (5);
Excavating a foundation pit (1), exposing one side, close to the foundation pit (1), of the front row of micro piles (3), taking out soft objects filled in the reinforcing steel bar sleeve, and connecting one end of the reinforcing steel bar with the reinforcing steel bar sleeve in a threaded manner;
Installing a reinforcing mesh (16), wherein transverse lacing wires (15) in the reinforcing mesh (16) are welded with the end parts of the reinforcing ribs of the connecting pieces (14);
Pouring a concrete panel layer (4), wherein the concrete panel layer (4) comprises a reinforcing mesh (16);
Step six, constructing a water retaining wall (6) and a protective railing above the connecting part (5); and excavating a slope top drainage ditch (7) at one side of the connecting part (5) far away from the foundation pit (1).
10. The construction method of the double-row mini pile foundation pit supporting structure according to claim 9, wherein the fourth step further comprises a drain pipe (9) installed below the connecting portion (5) and close to the bottom surface of the foundation pit (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410486687.8A CN118087553A (en) | 2024-04-23 | 2024-04-23 | Double-row miniature pile foundation pit supporting structure and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410486687.8A CN118087553A (en) | 2024-04-23 | 2024-04-23 | Double-row miniature pile foundation pit supporting structure and construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118087553A true CN118087553A (en) | 2024-05-28 |
Family
ID=91152145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410486687.8A Pending CN118087553A (en) | 2024-04-23 | 2024-04-23 | Double-row miniature pile foundation pit supporting structure and construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118087553A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101519485A (en) * | 2008-11-08 | 2009-09-02 | 中国工程物理研究院化工材料研究所 | Wide-temperature-range damping vibration attenuation polyurethane microporous elastomer material and preparation method thereof |
| CN106522242A (en) * | 2016-12-21 | 2017-03-22 | 大连交通大学 | Foundation pit supporting system for subsurface structure close to soft ground stratum and construction method of foundation pit supporting system |
| KR101793037B1 (en) * | 2016-12-28 | 2017-11-02 | (주)아리수엔지니어링 | Construction method of permanent wall with retaining wall combined PHC pile and steel pipe |
| CN107761744A (en) * | 2017-11-30 | 2018-03-06 | 华东建筑设计研究院有限公司 | A kind of continuous protective construction of bored concrete pile inter-pile soil |
| CN109914422A (en) * | 2019-03-01 | 2019-06-21 | 华北水利水电大学 | A kind of steel pipe and soil nailing combined type foundation pit supporting construction and construction method |
| CN116479897A (en) * | 2023-01-12 | 2023-07-25 | 山东建大工程鉴定加固设计有限公司 | Shallow foundation pit collapse rapid reinforcement supporting method with depth smaller than 10m |
-
2024
- 2024-04-23 CN CN202410486687.8A patent/CN118087553A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101519485A (en) * | 2008-11-08 | 2009-09-02 | 中国工程物理研究院化工材料研究所 | Wide-temperature-range damping vibration attenuation polyurethane microporous elastomer material and preparation method thereof |
| CN106522242A (en) * | 2016-12-21 | 2017-03-22 | 大连交通大学 | Foundation pit supporting system for subsurface structure close to soft ground stratum and construction method of foundation pit supporting system |
| KR101793037B1 (en) * | 2016-12-28 | 2017-11-02 | (주)아리수엔지니어링 | Construction method of permanent wall with retaining wall combined PHC pile and steel pipe |
| CN107761744A (en) * | 2017-11-30 | 2018-03-06 | 华东建筑设计研究院有限公司 | A kind of continuous protective construction of bored concrete pile inter-pile soil |
| CN109914422A (en) * | 2019-03-01 | 2019-06-21 | 华北水利水电大学 | A kind of steel pipe and soil nailing combined type foundation pit supporting construction and construction method |
| CN116479897A (en) * | 2023-01-12 | 2023-07-25 | 山东建大工程鉴定加固设计有限公司 | Shallow foundation pit collapse rapid reinforcement supporting method with depth smaller than 10m |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204590038U (en) | A kind of permanent foundation pit supporting construction | |
| CN107794946B (en) | Underground comprehensive pipe rack structure deeply buried in soft soil and construction method thereof | |
| CN105569051A (en) | Foundation pit support system of sandy pebble boulder geological stratification and construction method | |
| CN110777802A (en) | Deep foundation pit high-low span supporting structure and construction method thereof | |
| CN108951649B (en) | Foundation pit supporting structure | |
| CN105133581A (en) | Three-in-one construction method for uplift pile, lattice column and precipitation well in supporting structure | |
| KR20120109418A (en) | Inclined earth retaining structure method | |
| CN101793027A (en) | Core-grouted static pressure anchor rod pile | |
| CN113431097A (en) | Protection structure of shallow foundation building next to deep foundation pit engineering and construction method | |
| CN110805049B (en) | Construction method of mountain slope ultra-thickness spray anchor permanent supporting structure | |
| CN108035360A (en) | A kind of method for pattern foundation pit supporting structure | |
| CN111622234A (en) | Unloading type thin-wall box-type retaining wall supported by obliquely and vertically combined steel pipe pile and construction process | |
| CN118087553A (en) | Double-row miniature pile foundation pit supporting structure and construction method | |
| CN214460477U (en) | Combined foundation pit support | |
| CN213952237U (en) | Take a four corners supporting beam's underground structure | |
| CN111911183B (en) | Tunnel hole entering construction method based on end wall type guide wall structure | |
| CN213625605U (en) | Dig deep basal pit structure of stake anchor and hanging net injection concrete soon | |
| CN113668554A (en) | Construction method of foundation pit supporting structure adjacent to building | |
| CN221523668U (en) | Existing building foundation reinforcing system | |
| CN114232601B (en) | Construction method of lower building envelope wall of pipeline | |
| CN211549705U (en) | Tunnel headwall structure | |
| CN213709563U (en) | Foundation pit supporting structure | |
| CN215948218U (en) | A construction support frame for narrow and small space | |
| CN212452653U (en) | Supporting structure for constructing foundation pit above existing facility | |
| CN219772981U (en) | Building envelope of roof is done conversely to underground space |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |