CN111005363A - Spliced snowflake type steel sheet pile capable of monitoring self deformation and construction method thereof - Google Patents
Spliced snowflake type steel sheet pile capable of monitoring self deformation and construction method thereof Download PDFInfo
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- CN111005363A CN111005363A CN201911217787.6A CN201911217787A CN111005363A CN 111005363 A CN111005363 A CN 111005363A CN 201911217787 A CN201911217787 A CN 201911217787A CN 111005363 A CN111005363 A CN 111005363A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 88
- 239000010959 steel Substances 0.000 title claims abstract description 88
- 241000533950 Leucojum Species 0.000 title claims abstract description 45
- 238000010276 construction Methods 0.000 title claims abstract description 24
- 238000012544 monitoring process Methods 0.000 title claims abstract description 21
- 239000013307 optical fiber Substances 0.000 claims abstract description 38
- 238000000034 method Methods 0.000 claims description 11
- 238000003466 welding Methods 0.000 claims description 11
- 230000002787 reinforcement Effects 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 6
- 230000003014 reinforcing effect Effects 0.000 abstract description 5
- 238000004080 punching Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
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- 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
- E02D5/02—Sheet piles or sheet pile bulkheads
- E02D5/03—Prefabricated parts, e.g. composite sheet piles
- E02D5/04—Prefabricated parts, e.g. composite sheet piles made of steel
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2200/00—Geometrical or physical properties
- E02D2200/16—Shapes
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- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a spliced snowflake type steel sheet pile capable of monitoring self deformation and a construction method thereof, wherein the section of the pile body of the steel sheet pile is in a snowflake type formed by three Y-shaped structures with included angles of 120 degrees; the steel sheet pile body is provided with an optical fiber for monitoring the self deformation, and the optical fiber is connected with a data receiver; the spliced snowflake type steel sheet pile comprises a bottom spliced pile, a middle section spliced pile and a top spliced pile; and splicing and reinforcing the spliced piles by inserting the inverted convex shapes into the concave shapes. According to the invention, the pile body of the steel sheet pile is monitored in real time through the optical fiber, the punching depth is controlled in real time through the scale, and the characteristics of the steel sheet pile are known through the two-dimensional code, so that the design of the steel sheet pile is more scientific and more modern. The invention can splice the required pile body length, and solves the problems of difficult transportation and easy blockage and inclination of piling of the super-long steel sheet pile and the problem of difficult piling of underground low space; the snowflake-shaped section has larger bearing capacity, can be used for projects with higher requirements on uneven settlement, and solves the problems of bumping at the bridge head and reinforcing soft foundations.
Description
Technical Field
The invention relates to a steel sheet pile in geotechnical and foundation engineering, in particular to a spliced snowflake type steel sheet pile capable of monitoring self deformation and a construction method thereof.
Background
With the development of the times, underground spaces are increasingly developed, and piling is required to perform foundation treatment in the environment of the underground spaces such as certain tunnels. Over time, a series of problems occur that some buildings need to be heightened, or the buildings need to be reinforced on a foundation, and the buildings need to be corrected and centered due to inclination. In the course of doing the above-mentioned several works, the difficulty of piling during the treatment of the foundation is encountered. The reason for this is that some pile foundations need to be processed inside the tunnel and the original building, and the height inside the tunnel and the original building limits the use of the existing various pile foundations. In addition, the problem that the super-long steel sheet pile is difficult to transport and easy to incline during piling exists. Therefore, it is necessary to research a spliced pile and a construction method thereof, so that the spliced pile is suitable for low-space environments such as heightening of old houses, deviation rectification and righting of buildings, and building foundation reinforcement, and solves the problems of difficult transportation, easy inclination of piling and the like of ultra-long steel sheet piles.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a spliced snowflake type steel sheet pile capable of monitoring self deformation and a construction method thereof, so that the design of the steel sheet pile is more scientific and modernized, and the technical problems that the pile driving is difficult in the treatment of the foundation in a tunnel and the reinforcement of the foundation in a building and the transportation of an overlong steel sheet pile is difficult and the pile driving is easy to incline are solved.
The technical scheme is as follows: the spliced snowflake type steel sheet pile can monitor the self deformation, and the section of the pile body of the steel sheet pile is in a snowflake shape formed by three Y shapes with included angles of 120 degrees; the steel sheet pile body is provided with an optical fiber for monitoring the self deformation, and the optical fiber is connected with a data receiver; the spliced snowflake type steel sheet pile comprises a bottom spliced pile, a middle section spliced pile and a top spliced pile;
the bottom of the top end spliced pile extends outwards to form an inverted convex section, the top of the top end spliced pile is connected with a pile cap, and the pile cap is composed of three Y-shaped steel plates with included angles of 120 degrees;
the middle section spliced pile is formed by sequentially splicing a plurality of sections of middle section spliced pile units; the bottom of the middle section spliced pile unit extends outwards to form an inverted convex section, and the top of the middle section spliced pile unit is hollowed out to form a concave section;
the bottom of the bottom spliced pile is in a pyramid shape to form a steel plate pile tip; the two-dimensional code is pasted at the bottom of the pile body, and the top of the pile body is hollowed to form a concave section;
the inverted convex-shaped section inserts the concave-shaped section to further connect the bottom end splicing pile with the middle section splicing pile, and the middle section splicing pile is connected with the top end splicing pile; the bolt holes are formed in the inverted-convex-shaped section and the concave-shaped section, the bottom splicing piles and the middle section splicing piles are connected through bolts, and the middle section splicing piles and the top splicing piles are connected through bolts and are reinforced to form a whole body through welding at the splicing positions.
Scales are carved on the pile bodies of the top splicing pile, the middle section splicing pile and the bottom splicing pile.
And in the construction process, the optical fibers are longitudinally distributed and fixed along the 120-degree included angle intersection of the section of the pile body of the spliced snowflake type steel sheet pile.
The optical fiber is longitudinally fixed at the 120-degree included angle intersection of the section of the pile body of the spliced snowflake type steel sheet pile through the fixing device.
The arrangement mode of the optical fibers on the section of the pile body of the steel sheet pile is U-shaped.
The surface of the pile tip of the steel plate of the bottom spliced pile is a smooth surface.
The pile body length range of the top end splicing pile, the middle section splicing pile and the bottom end splicing pile is 2-3 m.
The construction method of the spliced snowflake type steel sheet pile capable of monitoring the deformation of the pile comprises the following steps of:
(1) arranging optical fibers on the pile body of the bottom spliced pile, fixing the optical fibers by using a fixing device, and driving the bottom spliced pile to a specified depth;
(2) the pile driver lifts the middle section spliced pile and distributes redundant optical fibers of the bottom end spliced pile on the middle section spliced pile, and then the middle section spliced pile and the driven bottom end spliced pile are connected and fixed into a whole in a centering way;
(3) driving the pile in the step (2) to a specified depth by using a pile driver;
(4) repeating the steps (2) and (3) according to the length required by the actual engineering to splice the snowflake type steel sheet piles into a whole;
(5) and (5) driving the top spliced piles to a specified depth by using a pile driver.
(6) And connecting the pile cap and the top spliced pile body into a whole, and driving the spliced snowflake type steel sheet pile to a specific position.
(7) Laying steel bars to manufacture a splicing structure and a bearing platform structure for connecting the steel sheet pile and the bearing platform, laying optical fibers along anchor bars in the splicing structure and steel bars in the bearing platform structure, and leading out the ground to be connected into a data receiver.
(8) And pouring concrete into the reinforcement cages of the splicing structure and the bearing platform structure to complete construction.
In the step (2), the inverted convex section at the bottom of the middle section spliced pile is inserted into the concave section at the top of the bottom end spliced pile, bolt holes are overlapped, the inverted convex section and the concave section are connected into a whole through high-strength bolts, and welding rods are welded on the spliced part for reinforcement.
And (6) connecting the pile cap with the top spliced pile body into a whole through a flange.
The working principle is as follows: each part of the spliced snowflake type steel sheet pile capable of monitoring the deformation of the pile is prefabricated and then directly transported to a construction site, and in the piling process, a plurality of middle section spliced piles are spliced according to actual engineering requirements and are spliced with one bottom end spliced pile and one top end spliced pile into a whole; laying optical fibers in the splicing and driving process of the steel plate pile, and accessing the optical fibers into a data receiver after construction to monitor the deformation of the pile body in real time so as to form the ultra-long snowflake type steel plate pile meeting the actual engineering requirements.
Has the advantages that: compared with the prior art, the invention has the following advantages:
(1) the spliced type pile is convenient to transport, the splicing mode is simple and convenient, any length can be spliced according to actual engineering requirements, the requirements of various engineering working conditions are met, and the application range is wider.
(2) Introducing optical fibers, a scale and a two-dimensional code, laying the optical fibers in the driving process of the steel sheet pile, and accessing the optical fibers into a data receiver to monitor the deformation of the pile body in real time after the construction is finished; the piling depth is controlled in real time through the scale, and the characteristic function of the steel sheet pile is known in a code scanning mode, so that the design of the steel sheet pile is more scientific and more modern.
(3) The spliced piles of all sections forming the pile body are short in length, and are particularly suitable for piling in low-altitude environments, so that the technical problems that the piles are difficult to pile in the tunnel internal foundation treatment and the building internal reinforcement foundation are effectively solved.
(4) The snowflake type pile body greatly enlarges the contact area between the pile body and the soil body, improves the bearing capacity of the pile body, can be used for projects with higher requirements on uneven settlement, and solves the problems of bumping at the bridge head and reinforcing soft foundations; the axial symmetry star type design steel sheet pile has the advantages that the overall rigidity is high, the deformation of a pile body can be effectively controlled, and the axial symmetry star type design steel sheet pile has wide application prospects in the fields of buildings, roads, bridges and rock soil.
(5) By using the improved steel sheet pile pyramid-shaped pile head, the inserting and driving speed and the pile forming probability of the steel sheet pile are effectively improved.
Drawings
FIG. 1 is a schematic diagram illustrating the completion of the construction of a steel sheet pile according to the present invention;
FIG. 2 is a schematic structural view of a bottom spliced pile according to the present invention;
FIG. 3 is a schematic structural view of a middle-section spliced pile according to the present invention;
FIG. 4 is a schematic structural view of a top spliced pile according to the present invention;
FIG. 5 is a sectional view of the connection mode of the spliced piles of each section in the invention;
FIG. 6 is a schematic diagram of the splicing of a steel sheet pile and a bearing platform according to the present invention;
FIG. 7 is a cross-sectional view showing the arrangement of optical fibers according to the present invention;
FIG. 8 is a sectional view of the pile body at the splicing portion of the present invention;
FIG. 9 is a schematic view of the pile tip of the bottom spliced pile of the present invention;
fig. 10 is a schematic view of the top end spliced pile cap of the present invention.
Detailed Description
As shown in fig. 1, the spliced snowflake type steel sheet pile capable of monitoring deformation of the pile is composed of a plurality of segments of spliced piles, and comprises a bottom spliced pile 1, a plurality of middle segment spliced piles 2 and a top spliced pile 3. The cross sections of the pile bodies of the bottom splicing pile, the middle section splicing pile and the top end splicing pile are snowflake-shaped consisting of three Y-shaped bodies with included angles of 120 degrees. The spliced piles are connected by inserting the inverted convex-shaped section 7 into the concave-shaped section 6 and using a high-strength bolt, and are further reinforced by welding rods 9 to form a whole body for actual engineering.
Wherein the length scope of bottom concatenation stake, interlude concatenation stake unit and top concatenation stake is 2 ~ 3m to the construction is convenient for. The spliced snowflake type steel sheet pile is introduced with the optical fiber 12, the scale 11 and the two-dimensional code 5, the optical fiber is laid in the driving process of the steel sheet pile, and the optical fiber is accessed into an external data receiver 14 after the construction is finished so as to monitor the deformation of the pile body in real time; meanwhile, the piling depth can be known in real time through the scale 11, and the characteristics of the pile can be known in a two-dimensional code scanning mode.
As shown in fig. 2, the bottom of the bottom spliced pile 1 is pyramid-shaped, and a steel plate pile tip 4 is formed, and the shape of the pile tip reduces the resistance of the pile in the driving process. The two-dimensional code 5 is attached to the bottom of the pile body of the bottom spliced pile 1, so that a client can conveniently scan codes to know the characteristics of the spliced snowflake type pile; scales 11 are engraved on the side edges of the pile body of each segment of spliced pile so as to know the depth of the pile in the driving process in real time; 1/3 length scope fretwork at bottom concatenation stake 1 top forms character cut in bas-relief shape section 6, and this section corresponding position is equipped with bolt hole 8.
As shown in fig. 3, 1/3 lengths extending outwards from the bottom of the middle section spliced pile 2 form an inverted convex section 7, 1/3 length range of the top of the middle section spliced pile is hollowed out to form a concave section 6, and bolt holes 8 are arranged at corresponding positions of the concave section and the inverted convex section; the side edge of the pile body is carved with a scale 11. The middle section spliced pile is formed by sequentially splicing a plurality of sections of middle section spliced pile units.
As shown in fig. 4, the bottom of the top spliced pile 3 extends outwards 1/3 to form an inverted convex section 7, and the top is connected with the pile cap 10; the staff gauge 11 is carved with to pile body lateral margin, and the corresponding position of the inverted-convex character-shaped section 7 has seted up bolt hole 8.
As shown in fig. 5, after the alignment of the spliced piles is completed, the inverted-convex section 7 at the bottom is inserted into the concave section 6 at the top, so that the bolt holes 8 of the two sections are overlapped, the sections are connected with each other through high-strength bolts to form a long snowflake type steel sheet pile, and the periphery of the contact is further reinforced in a welding rod 9 welding mode; the first welding rod and the second welding rod have the functions of reinforcing connection and stiffening ribs.
As shown in fig. 6, the drawing is a structural design drawing of a novel uplift pile-splicing node of a steel sheet pile and a bearing platform, and the bearing platform 16 and the pile are mainly connected and force-transferred through a pile-splicing structure 15. The upper anchor bars 19 are mounted to the sheet pile caps 10 by means of mechanical connection joints 18. The upper pulling load is transferred to the pile cap 10 through the upper anchor bar 19 and then transferred to the lower anchor bar 17 through the pile cap. Wherein, 20 is pile extension structure anchor bars, and 21 is pile extension structure stirrups.
As shown in fig. 7, the optical fibers 12 are longitudinally arranged and fixed along the intersection of 120 ° included angles of the section of the spliced snowflake type steel sheet pile, specifically, the optical fibers 12 are arranged on an inner angle m and an outer angle n of the section of the pile body, and are fixed by the fixing steel sheets 13 through high-strength bolts. The internal angles are three 120-degree angles m at the intersection of the central points of the snowflake-shaped section, and the external angles are three 120-degree angles n at the intersection of the periphery of the section. The overall arrangement mode of the optical fibers 12 on the section of the steel sheet pile is U-shaped.
As shown in fig. 8, the cross section of the spliced part of the steel sheet pile is in two concentric snowflake shapes consisting of three Y shapes with an included angle of 120 °.
As shown in fig. 9, the pile bottom of the bottom spliced pile is pyramid-shaped to form a steel plate pile tip 4, the cone angle is 45 degrees, and the surface of the pyramid-shaped pile tip is made into a smooth surface.
As shown in fig. 10, the pile cap 10 is composed of three Y-shaped steel plates having an included angle of 120 °, and has a relatively thick thickness.
With the combination of the attached drawings, the construction method of the spliced snowflake type steel sheet pile capable of monitoring the deformation of the pile comprises the following steps:
(1) the prefabricated snowflake type piles of all sections are transported to a construction site according to actual engineering requirements, and site obstacles are cleared before pile sinking, so that pile driving preparation work is well done;
(2) arranging optical fibers on the pile body of the bottom spliced pile, fixing the optical fibers by using a fixing device, driving the bottom spliced pile to a specified depth by using a proper pile driver, and keeping the pile body vertical in the pile driving process to avoid the influence of inclination of the pile body on pile connection;
(3) hoisting the middle section spliced pile by using a pile driver, laying redundant optical fibers of the bottom end spliced pile on the middle section spliced pile, centering the middle section spliced pile and the already-drilled bottom end spliced pile, inserting the inverted-convex-shaped section at the bottom of the middle section spliced pile into the concave-shaped section at the top of the bottom end spliced pile, enabling bolt holes to coincide, connecting the inverted-convex-shaped section at the bottom of the middle section spliced pile into a whole by using a high-strength bolt, welding rods at the spliced part for further reinforcement, and further reinforcing the gap at the connected part by adopting a welding rod welding mode before continuing piling;
(4) driving the pile in the step (3) to a specified depth by using a pile driver, and keeping the pile body vertical in the pile driving process to avoid the inclination of the pile body so as to influence pile splicing;
(5) repeating the steps (3) and (4) according to the length required by the actual engineering to splice the snowflake type steel sheet piles into the overlength snowflake type steel sheet piles meeting the actual engineering requirements;
(6) driving the top spliced piles to a specified depth by using a pile driver;
(7) connecting the pile cap with the top spliced pile body into a whole through a flange on a construction site, and finally driving the spliced snowflake type steel sheet pile to a specific position;
(8) laying steel bars to manufacture a splicing structure and a bearing platform structure for connecting the steel sheet pile and the bearing platform, laying optical fibers along anchor bars in the splicing structure and steel bars in the bearing platform structure, and leading out the optical fibers to be connected to a data receiver on the ground to monitor the deformation of a pile body in real time;
(9) and pouring concrete into the reinforcement cages of the splicing structure and the bearing platform structure to complete construction.
Claims (10)
1. The utility model provides a can monitor concatenation type snowflake type steel sheet pile that self warp which characterized in that: the section of the pile body of the steel sheet pile is in a snowflake shape consisting of three Y shapes with included angles of 120 degrees; the steel sheet pile body is provided with an optical fiber for monitoring the self deformation, and the optical fiber is connected with a data receiver (14); the spliced snowflake type steel sheet piles comprise bottom spliced piles (1), middle section spliced piles (2) and top spliced piles (3);
the bottom of the top end spliced pile extends outwards to form an inverted convex section (7), the top of the top end spliced pile is connected with a pile cap (10), and the pile cap is composed of three Y-shaped steel plates with included angles of 120 degrees;
the middle section spliced pile is formed by sequentially splicing a plurality of sections of middle section spliced pile units; the bottom of the middle section spliced pile unit extends outwards to form an inverted convex section (7), and the top of the middle section spliced pile unit is hollowed to form a concave section (6);
the bottom of the bottom spliced pile is in a pyramid shape to form a steel plate pile tip (4); the two-dimensional code (5) is pasted at the bottom of the pile body, and the top of the pile body is hollowed to form a concave section (6);
the inverted convex-shaped section inserts the concave-shaped section to further connect the bottom end splicing pile with the middle section splicing pile, and the middle section splicing pile is connected with the top end splicing pile; the bottom end splicing pile and the middle section splicing pile as well as the middle section splicing pile and the top end splicing pile are connected through bolts, and the splicing part is reinforced to form a whole.
2. The spliced snowflake type steel sheet pile capable of monitoring self-deformation according to claim 1, wherein: and scales (11) are carved on the pile bodies of the top end splicing pile, the middle section splicing pile and the bottom end splicing pile.
3. The spliced snowflake type steel sheet pile capable of monitoring self-deformation according to claim 1, wherein: and the optical fibers are longitudinally distributed and fixed along the 120-degree included angle intersection of the section of the pile body of the spliced snowflake type steel sheet pile in the construction process.
4. The spliced snowflake type steel sheet pile capable of monitoring self-deformation according to claim 3, wherein: the optical fibers are longitudinally fixed at the 120-degree included angle intersection of the section of the pile body of the spliced snowflake type steel sheet pile through a fixing device (13).
5. The spliced snowflake type steel sheet pile capable of monitoring self-deformation according to claim 1, wherein: the optical fibers are distributed on the section of the pile body of the steel sheet pile in a U-shaped mode.
6. The spliced snowflake type steel sheet pile capable of monitoring self-deformation according to claim 1, wherein: the steel plate pile tip surface of the bottom spliced pile is a smooth surface.
7. The spliced snowflake type steel sheet pile capable of monitoring self-deformation according to claim 1, wherein: the pile body length range of the top end splicing pile, the middle section splicing pile and the bottom end splicing pile is 2-3 m.
8. A construction method using the spliced type snowflake type steel sheet pile capable of monitoring the deformation thereof according to any one of claims 1 to 7, wherein: the method comprises the following steps:
(1) longitudinally arranging and fixing the optical fibers (12) on the pile body of the bottom spliced pile, and then driving the bottom spliced pile (1) to a specified depth;
(2) hoisting the middle-section spliced pile (2) by using a pile driver, arranging redundant optical fibers (12) of the bottom-end spliced pile on the middle-section spliced pile (2), and connecting and fixing the middle-section spliced pile (2) and the drilled bottom-end spliced pile (1) in a centering manner to form a whole;
(3) utilizing a pile driver to drive the spliced piles at the middle section in the step (2) to a specified depth;
(4) repeating the steps (2) and (3) according to the length required by the actual engineering, and splicing the snowflake type steel sheet piles into a whole;
(5) driving the top spliced pile (3) to a specified depth by using a pile driver;
(6) connecting the pile cap (10) and the pile body of the top spliced pile (3) into a whole, and driving the spliced snowflake type steel sheet pile to a set position;
(7) laying steel bars to manufacture a splicing structure (15) and a bearing platform structure (16) for connecting the steel sheet pile and the bearing platform, laying the optical fibers (12) along anchor bars (20) in the splicing structure and the steel bars in the bearing platform structure, and leading out the optical fibers to be connected to a data receiver (14);
(8) and pouring concrete into the reinforcement cages of the splicing structure (15) and the bearing platform structure (16) to finish construction.
9. The construction method of a spliced snowflake type steel sheet pile capable of monitoring self-deformation according to claim 8, wherein: in the step (2), the inverted convex section (7) at the bottom of the middle section spliced pile (2) is inserted into the concave section (6) at the top of the bottom spliced pile (1), bolt holes (8) are overlapped, the inverted convex section and the concave section are connected into a whole through high-strength bolts, and welding rods (9) are welded on the spliced part for reinforcement.
10. The construction method of a spliced snowflake type steel sheet pile capable of monitoring self-deformation according to claim 9, wherein: and (6) connecting the pile cap with the top spliced pile body into a whole through a flange.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911217787.6A CN111005363A (en) | 2019-12-03 | 2019-12-03 | Spliced snowflake type steel sheet pile capable of monitoring self deformation and construction method thereof |
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| CN201911217787.6A CN111005363A (en) | 2019-12-03 | 2019-12-03 | Spliced snowflake type steel sheet pile capable of monitoring self deformation and construction method thereof |
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| CN111764371A (en) * | 2020-06-09 | 2020-10-13 | 河海大学 | A spliced snowflake-shaped steel sheet pile and its construction method |
| CN113373907A (en) * | 2021-06-22 | 2021-09-10 | 河海大学 | Composite driving type snowflake type pile system and construction method |
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