CN108625231A - A kind of stake-anchor-plate push-pull-type road structure - Google Patents
A kind of stake-anchor-plate push-pull-type road structure Download PDFInfo
- Publication number
- CN108625231A CN108625231A CN201810825229.7A CN201810825229A CN108625231A CN 108625231 A CN108625231 A CN 108625231A CN 201810825229 A CN201810825229 A CN 201810825229A CN 108625231 A CN108625231 A CN 108625231A
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- China
- Prior art keywords
- pile
- anchor
- concrete slab
- reinforced concrete
- roadbed structure
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- 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
- 239000004567 concrete Substances 0.000 claims abstract description 22
- 239000011150 reinforced concrete Substances 0.000 claims description 26
- 230000002787 reinforcement Effects 0.000 claims description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 239000004575 stone Substances 0.000 claims description 3
- 238000010030 laminating Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 6
- 239000002689 soil Substances 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 11
- 238000010276 construction Methods 0.000 description 8
- 238000013461 design Methods 0.000 description 7
- 210000003205 muscle Anatomy 0.000 description 5
- 238000003672 processing method Methods 0.000 description 4
- 238000005056 compaction Methods 0.000 description 3
- 238000005553 drilling Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B2/00—General structure of permanent way
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B2/00—General structure of permanent way
- E01B2/006—Deep foundation of tracks
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses a kind of piled anchor plate push-pull-type road structures, including armoured concrete slab, prestressed anchor and bored concrete pile, armoured concrete slab offers anchor perforation, the lower end of prestressed anchor extends to inside bored concrete pile and is fixedly connected with bored concrete pile, the upper end of prestressed anchor passes through anchor perforation and is equipped with detachable anchorage, the bottom of anchorage is bonded with the top of armoured concrete slab, the present invention makes full use of concrete slab to be homogenized the load that top is transmitted to ground, bored concrete pile and armoured concrete slab stress and compatibility of deformation are realized using the prestressing force of prestressed anchor offer, load is transferred to ground depths supporting course using stake, achieve the effect that soft soil foundation becoming the larger ground of rigidity, the differential settlement and deformation problem of effective solution soft soil foundation.
Description
Technical Field
The invention belongs to the field of foundation engineering, relates to a railway roadbed structure, and particularly relates to a high-speed railway pile-anchor-plate top-pull type roadbed structure.
Background
With the development of the traffic industry of China, the construction of high-speed and heavy haul railways is changed day by day, a plurality of roadbed need to pass through complicated geological conditions, and the settlement of the soft soil roadbed becomes one of the major problems in the construction of the high-speed and heavy haul railways. At present, the soft soil roadbed processing method is mainly divided into a shallow layer processing method and a deep layer processing method, wherein the shallow layer processing method mainly comprises a reinforced earth method, a dynamic compaction method, a replacement and filling method, a bagged sand well method and the like; the deep treatment method mainly comprises a deep stirring method, a drainage consolidation method, a lime pile method, a high-pressure jet grouting method and the like. The conventional soft soil roadbed treatment methods need a long construction period, the overall or local settlement problem of the roadbed often occurs, and the problem of uneven settlement of the roadbed cannot be fundamentally solved. The construction method is a project which has a tight construction period and high requirements on foundation deformation and is difficult to meet the requirements of the currently constructed high-speed railway and heavy haul railway. In order to solve the problems, a pile-raft composite foundation is adopted, and the foundation has high bearing capacity, high rigidity, good stability and durability, but practice proves that uneven settlement and deformation of an upper concrete slab caused by uneven stress of a pile foundation can also occur, so that the integral inclination phenomenon of an upper structure can also occur.
Disclosure of Invention
In order to fully play the combined action of the pile, the anchor and the plate and ensure that the deformation and the settlement of the foundation of the upper structure are smaller, the invention provides a top-pull type roadbed structure consisting of a cast-in-place pile, a prestressed anchor rod and a reinforced concrete plate. The technical scheme of the invention is as follows:
the utility model provides a stake-anchor-board top-pull formula roadbed structure, includes reinforced concrete slab, prestressed anchorage pole and bored concrete pile, reinforced concrete slab has seted up the stock and has perforated, the lower extreme of prestressed anchorage pole extend to the bored concrete pile inside and with bored concrete pile fixed connection, the stock is perforated and be equipped with detachable ground tackle is passed to the upper end of prestressed anchorage pole, the lower surface of ground tackle and reinforced concrete slab's upper surface laminating.
Preferably, the lower end of the cast-in-place pile is provided with an expansion part.
Preferably, a steel reinforcement cage is arranged in the cast-in-place pile.
Preferably, the reinforcement cage includes spiral stirrup and indulges the muscle, spiral stirrup with indulge muscle fixed connection.
Preferably, a broken stone mattress layer is laid at the bottom of the reinforced concrete slab.
Preferably, an embankment filling layer is laid on the top of the reinforced concrete slab.
Compared with the prior art, the invention has the beneficial effects that: the invention fully utilizes the concrete slab to homogenize the load transmitted to the foundation from the upper part, utilizes the prestress provided by the prestressed anchor rod to realize the coordination of the stress and the deformation of the cast-in-place pile and the reinforced concrete slab, utilizes the pile to transmit the load to the bearing layer in the deep part of the foundation, achieves the effect of changing the soft foundation into the foundation with higher rigidity, and effectively solves the problems of uneven settlement and deformation of the soft foundation.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the construction of the present invention without a gravel cushion layer;
FIG. 3 is a schematic cross-sectional view taken at A-A of FIG. 1;
FIG. 4 is a schematic cross-sectional view taken at B-B of FIG. 1;
FIG. 5 is a schematic structural view of the reinforcement cage of the present invention;
FIG. 6 is a schematic cross-sectional view at C-C of FIG. 5;
FIG. 7 is a schematic structural view of a prestressed anchor according to the present invention;
fig. 8 is a schematic view of the construction of a reinforced concrete panel of the present invention.
Wherein,
1 bored concrete pile, 2 rubble mattress layers, 3 reinforced concrete board, 4 embankment bed packings, 5 prestressed anchorage pole, 6 ground tackle, 7 vertical muscle, 8 spiral stirrup, 9 concrete, 10 stock perforation.
Detailed Description
In order to solve the problems in the prior art, as shown in fig. 1 to 8, the present invention provides a pile-anchor-slab top-pulling roadbed structure, comprising a reinforced concrete slab 3, a prestressed anchor rod 5 and a cast-in-place pile 1, wherein the reinforced concrete slab 3 is provided with an anchor rod through hole 10, the lower end of the prestressed anchor rod 5 extends into the cast-in-place pile 1 and is fixedly connected with the cast-in-place pile 1, the upper end of the prestressed anchor rod 5 passes through the anchor rod through hole 10 and is provided with a detachable anchor 6, and the lower surface of the anchor 6 is attached to the upper surface of the reinforced concrete slab 3.
The cast-in-place pile 1 is concrete pile, the top of the cast-in-place pile 1 is parallel and level to the ground surface, the prestressed anchor rod 5 and the anchorage device 6 are in the prior art, the structure of the cast-in-place pile is not detailed, the top of the prestressed anchor rod 5 is in threaded connection with the anchorage device 6, looseness between the rod body of the prestressed anchor rod and the anchorage device 6 can be avoided through the prestressed anchor rod 5, the stability of prestress between the anchorage device 6 and the cast-in-place pile 1 is guaranteed, and therefore the structural stability of the cast-in-place pile is.
Specifically, the lower end of the cast-in-place pile 1 is provided with an expansion part, and the arrangement of the expansion part enables the connection between the cast-in-place pile 1 and the foundation to be more stable, so that the stability of the structure of the invention is further improved.
Specifically, a reinforcement cage is arranged in the cast-in-place pile 1, the strength of the cast-in-place pile 1 is improved due to the arrangement of the reinforcement cage, the bearing capacity of the cast-in-place pile is improved, and the reinforcement cage can be omitted according to design requirements.
Particularly, the steel reinforcement cage includes spiral stirrup 8 and vertical muscle 7, spiral stirrup 8 with vertical muscle 7 fixed connection.
Specifically, rubble mattress layer 2 has been laid to reinforced concrete slab 3's bottom, and rubble mattress layer 2 plays the effect of connecting reinforced concrete slab 3 and ground, can play the effect of transmission load and diffusion stress, can play the effect of drainage simultaneously, according to the design needs, also can not set up rubble mattress layer 2.
Specifically, the embankment filling layer 4 is laid on the top of the reinforced concrete slab 3, the reinforced concrete slab 3 can provide sufficient reaction force for compaction of the embankment filling layer 4, the embankment filling layer 4 can reach a higher compaction standard, and the embankment filling layer 4 can further improve the homogenization degree of load, so that the structural stability of the invention is improved.
The construction and installation method of the pile-anchor-plate top-pull type roadbed structure comprises the following steps:
step 1, determining the strength grade and the steel bar grade of concrete 9, preparing longitudinal bars 7 and spiral stirrups 8, and binding a steel bar cage;
step 2, prefabricating a reinforced concrete plate 3 according to design requirements, and reserving an anchor rod through hole 10;
step 3, determining the position of the cast-in-place pile 1 according to design requirements, drilling at the determined position by using a drilling machine, starting reaming after drilling to a design elevation, and removing dregs and water at the bottom of a hole;
step 4, mounting a prestressed anchor rod 5; placing the prepared prestressed anchor rod 5 into the hole in the previous step, then placing the manufactured reinforcement cage (the reinforcement cage can be omitted according to design requirements), and pouring concrete 9 into the hole to a designed elevation;
step 5, paving a gravel cushion layer 2 with a certain thickness on the top of the cast-in-place pile 1;
step 6, slowly penetrating the prestressed anchor rod 5 through an anchor rod through hole 10 reserved on the prefabricated reinforced concrete slab 3, installing an anchorage device 6, and tensioning the prestressed anchor rod 5 to reach the designed pre-tensioning stress to complete the installation of the prestressed anchor rod 5;
and 7, paving an embankment filling layer 4 on the reinforced concrete plate 3 or the crushed stone mattress layer 2 according to design requirements.
The invention fully utilizes the reinforced concrete slab 3 to homogenize the load transmitted to the foundation from the upper part, utilizes the prestress provided by the prestressed anchor 5 to realize the coordination of the stress and the deformation of the cast-in-place pile 1 and the reinforced concrete slab 3, utilizes the pile to transmit the load to the bearing layer in the deep part of the foundation, achieves the effect of changing the soft foundation into the foundation with higher rigidity, and effectively solves the problems of uneven settlement and deformation of the soft foundation.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides a stake-anchor-board top-pull formula roadbed structure which characterized in that, includes reinforced concrete slab, prestressed anchorage pole and bored concrete pile, reinforced concrete slab has seted up the stock and has perforated, the lower extreme of prestressed anchorage pole extends to the bored concrete pile inside and with bored concrete pile fixed connection, the stock is perforated and be equipped with detachable ground tackle is passed to the upper end of prestressed anchorage pole, the lower surface of ground tackle and the laminating of reinforced concrete slab's upper surface.
2. The pile-anchor-plate top-pulling type roadbed structure according to claim 1, wherein the lower end of the cast-in-place pile is provided with an expansion part.
3. The pile-anchor-plate top-pulling type roadbed structure according to claim 2, wherein a steel reinforcement cage is arranged in the cast-in-place pile.
4. The pile-anchor-plate top-pulling type roadbed structure of claim 3, wherein the reinforcement cage comprises a spiral stirrup and a longitudinal bar, and the spiral stirrup is fixedly connected with the longitudinal bar.
5. The pile-anchor-plate top-pulling type roadbed structure according to claim 4, wherein a crushed stone bedding layer is laid on the bottom of the reinforced concrete plate.
6. The pile-anchor-plate top-pulling type roadbed structure according to claim 5, wherein a embankment filling layer is laid on the top of the reinforced concrete plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810825229.7A CN108625231A (en) | 2018-07-25 | 2018-07-25 | A kind of stake-anchor-plate push-pull-type road structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810825229.7A CN108625231A (en) | 2018-07-25 | 2018-07-25 | A kind of stake-anchor-plate push-pull-type road structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108625231A true CN108625231A (en) | 2018-10-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810825229.7A Pending CN108625231A (en) | 2018-07-25 | 2018-07-25 | A kind of stake-anchor-plate push-pull-type road structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111691250A (en) * | 2020-05-25 | 2020-09-22 | 中国路桥工程有限责任公司 | Construction method and equipment for cement concrete pavement |
| CN114775349A (en) * | 2022-03-23 | 2022-07-22 | 中铁七局集团第二工程有限公司 | Prefabricated UHPC pipe confined concrete overhead roadbed pile plate structure and construction process |
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Cited By (3)
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| CN111691250A (en) * | 2020-05-25 | 2020-09-22 | 中国路桥工程有限责任公司 | Construction method and equipment for cement concrete pavement |
| CN111691250B (en) * | 2020-05-25 | 2021-11-23 | 中国路桥工程有限责任公司 | Construction method and equipment for cement concrete pavement |
| CN114775349A (en) * | 2022-03-23 | 2022-07-22 | 中铁七局集团第二工程有限公司 | Prefabricated UHPC pipe confined concrete overhead roadbed pile plate structure and construction process |
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