CN216999110U - Roadbed pile plate structure for controlling roadbed settlement - Google Patents
Roadbed pile plate structure for controlling roadbed settlement Download PDFInfo
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- CN216999110U CN216999110U CN202123163688.XU CN202123163688U CN216999110U CN 216999110 U CN216999110 U CN 216999110U CN 202123163688 U CN202123163688 U CN 202123163688U CN 216999110 U CN216999110 U CN 216999110U
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- 239000002689 soil Substances 0.000 claims abstract description 64
- 239000004575 stone Substances 0.000 claims abstract description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 30
- 239000010959 steel Substances 0.000 claims description 30
- 239000010410 layer Substances 0.000 claims description 27
- 230000002787 reinforcement Effects 0.000 claims description 24
- 230000003014 reinforcing effect Effects 0.000 claims description 6
- 238000005266 casting Methods 0.000 claims description 5
- 239000002356 single layer Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 13
- 238000000034 method Methods 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
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Abstract
The utility model discloses a roadbed pile plate structure for controlling roadbed settlement, and belongs to the field of highway roadbed structures. The structure comprises embankment filling soil, a concrete beam, a bubble mixed light soil plate, a broken stone cushion layer and a precast tubular pile, wherein the concrete beam and the bubble mixed light soil plate are lapped to form a combined slab layer, the broken stone cushion layer is positioned below the combined slab layer, the embankment filling soil is positioned above the combined slab layer, and the precast tubular pile penetrates through the broken stone cushion layer and is connected with the bottom of the concrete beam; the concrete beams are distributed in a grid shape in a staggered mode along the transverse direction and the longitudinal direction of the roadbed, and grid points of the concrete beams are located at the tops of the precast tubular piles; the bubble mixed light soil plate is laid in the grid of the concrete beam, and the top surface of the bubble mixed light soil plate is flush with the top surface of the concrete beam. The utility model can effectively solve the problem of uneven settlement of the soft soil roadbed in the construction of the highway.
Description
Technical Field
The utility model belongs to the field of highway subgrade structures, and particularly relates to a subgrade pile plate structure for treating a soft soil subgrade under the combined action of a concrete beam and a bubble mixed light soil plate.
Background
With the continuous improvement of the highway network, the geological conditions for passing through the highway are more and more complex, and the soft soil roadbed treatment becomes one of the major problems in highway construction. For deep soft soil roadbed, the composite foundation treatment method mainly adopted in the road construction at present is that the pile foundation and the soil between the piles act together to bear the upper load. Engineering examples prove that the overall or local settlement phenomenon can still occur on the roadbed due to different construction qualities of pile foundations, so that the highway is unevenly settled. To the problem, a pile plate type structure can be adopted, namely a concrete slab is poured on the top of a pile foundation, the structure has high bearing capacity, high rigidity and good stability, and the uneven settlement of the roadbed can be effectively controlled. However, the pile slab structure requires a large area of concrete slab to be poured, so that the construction cost is high, and if the foundation needs to be reinforced and reinforced in the later period, the concrete slab needs to be broken, the engineering quantity is large, and the construction period is long.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved is as follows: aiming at the technical problems, the utility model provides a roadbed pile plate structure for controlling roadbed settlement, which can improve the overall stability of a roadbed, better bear upper load and solve the problem of uneven settlement of a soft soil roadbed in highway construction.
The technical scheme is as follows: a roadbed pile plate structure for controlling roadbed settlement comprises embankment filling, a concrete beam, a bubble mixed light soil plate, a broken stone cushion layer and a precast tubular pile, wherein the concrete beam and the bubble mixed light soil plate are lapped to form a combined plate layer, the broken stone cushion layer is positioned below the combined plate layer, the embankment filling is positioned above the combined plate layer, and the precast tubular pile penetrates through the broken stone cushion layer and is connected with the bottom of the concrete beam; the concrete beams are distributed in a grid shape in a staggered mode along the transverse direction and the longitudinal direction of the roadbed, and grid points of the concrete beams are located at the top of the precast tubular pile; the bubble mixed light soil plate is laid in the grid of the concrete beam, and the top surface of the bubble mixed light soil plate is flush with the top surface of the concrete beam.
Preferably, the cross section of the lap joint of the concrete beam and the air bubble mixed light soil plate is in a step shape or a slope shape.
Preferably, the overlapping length of the concrete beam and the air bubble mixed lightweight soil plate is not less than 0.3m and not less than
And L is the width of the top surface of the bubble mixed light soil plate, and B is the width of the bottom surface of the concrete beam.
Preferably, the lap joint department of bubble mixture light weight soil board and concrete beam is equipped with framework of steel reinforcement, framework of steel reinforcement includes two-layer mesh reinforcement that is parallel to each other and locates the steel reinforcement cage between the mesh reinforcement, mesh reinforcement and steel reinforcement cage pass through steel wire ligature and are connected.
Preferably, the meshes of the reinforcing mesh are squares of 3-5 cm specification, and the distance between two adjacent steel wire binding positions is 10-15 cm.
Preferably, the pile spacing of the precast tubular pile is 1.0-2.0 m, and the pile diameter is not less than 0.4 m.
Preferably, the design strength of the bubble mixing light soil plate is 0.6-2.0 MPa.
Preferably, a steel mesh or a steel bar truss is arranged inside the bubble mixed light soil plate.
Preferably, the concrete beam is a cast-in-place beam, and the bubble-mixed lightweight soil slab is a cast-in-place slab or a precast slab.
Preferably, the single-layer casting thickness of the bubble mixed light soil plate is 0.5-0.8 m.
Has the advantages that: the utility model improves the concrete plate in the traditional pile plate structure into a combined plate layer formed by lapping the concrete beam and the bubble mixed light soil plate, thereby not only greatly reducing the engineering cost, but also controlling the uneven settlement of the roadbed within an allowable range. And this structure is very convenient to the road maintenance management in later stage: when reinforcing the roadbed or carrying out comprehensive treatment on the roadbed and the pavement in the later period, relevant construction operations can be carried out only by dismantling the bubble mixed light soil plate, so that the construction period of old road reconstruction can be effectively shortened, the work amount of roadbed treatment in old road reconstruction is greatly reduced, and meanwhile, the cost of comprehensive treatment on the roadbed and the pavement can be obviously reduced. The roadbed pile plate structure with the combined action of the concrete beam and the bubble mixed light soil plate has the characteristics of good economy, good integrity, high bearing capacity, small uneven settlement, easiness in later-stage construction and the like, and can be widely popularized and used in roadbed processing and reinforcing engineering.
Drawings
Fig. 1 is an overall schematic view of a roadbed pile plate structure of the present invention;
FIG. 2 is a top view of a concrete beam and a bubble mixed lightweight earth plate of the present invention lapped to form a combination slab;
FIG. 3 is a stepped lap joint of the concrete beam and the air bubble hybrid lightweight earth plate of the present invention;
FIG. 4 is a slope-like lap joint form of the concrete beam and the air bubble hybrid lightweight soil plate of the present invention;
the numerical references in the figures represent the following: 1-embankment filling, 2-concrete beam, 3-bubble mixed light soil plate, 4-gravel cushion layer and 5-prefabricated pipe pile.
Detailed Description
The utility model is further described with reference to the following figures and specific examples.
Example 1
A certain project plan builds a highway, and a deep soft foundation with the thickness of more than 40 meters exists in the passing area of part of the highway. In order to avoid the great post-construction settlement of the road, the deep and thick soft foundation section of the project is constructed by adopting the pile-plate type structure.
Fig. 1 exemplarily shows a roadbed pile plate structure for controlling roadbed settlement, which is provided by the embodiment of the utility model and is used for soft soil roadbed treatment, wherein a concrete beam 2 and a bubble mixed light soil plate 3 work together.
As shown in fig. 1, the roadbed pile plate structure provided by the utility model comprises a concrete beam 2 and a foam mixed lightweight soil plate 3 which are lapped to form a combined slab layer, a gravel cushion layer 4 is positioned below the combined slab layer, embankment filling soil 1 is positioned above the combined slab layer, and a precast tubular pile 5 penetrates through the gravel cushion layer 4 and is connected with the bottom of the concrete beam 2.
As shown in fig. 2, the concrete beam 2 is a cast-in-place beam, and is distributed in a grid shape along the transverse direction and the longitudinal direction of the roadbed in a staggered manner, and grid points of the grid beam are positioned at the top of the precast tubular pile 5; the bubble mixed light soil plate 3 is laid in the grid of the concrete beam 2, and the top surface of the bubble mixed light soil plate is flush with the top surface of the concrete beam 2; the pile spacing of the precast tubular pile 5 is 1.0-2.0 m, and the pile diameter is not less than 0.4 m.
As shown in fig. 3 and 4, the cross section of the overlapping portion of the concrete beam 2 and the air bubble mixed lightweight earth plate 3 is stepped or sloped. The lapping length of the concrete beam 2 and the bubble mixed light soil plate 3 is not less than 0.3m and not less than
Wherein L is the top width of the bubble mixed lightweight soil plate 3, and B is the bottom width of the concrete beam 2.
A steel reinforcement framework can be arranged at the lap joint of the bubble mixed light soil plate 3 and the concrete beam 2, the steel reinforcement framework comprises two layers of parallel steel reinforcement meshes and a steel reinforcement cage arranged between the steel reinforcement meshes, and the steel reinforcement meshes and the steel reinforcement cage are bound and connected through steel wires; the mesh specification of the reinforcing mesh is 3-5 cm square, and the distance between two adjacent steel wire binding positions is 10-15 cm.
The bubble mixed light soil plate 3 can adopt a cast-in-place plate or a prefabricated plate with the design strength of 0.6-2.0 MPa and a reinforcing mesh or a reinforcing steel bar truss arranged inside, for example, the single-layer casting thickness of the bubble mixed light soil plate 3 which is cast in place is 0.5-0.8 m, and the casting sequence is that the casting is sequentially pushed along the long axis direction of the plate type.
The construction process of the roadbed pile plate structure of the embodiment is as follows:
the first step, the surface of the field is cleaned and excavated to a predetermined elevation.
And secondly, performing precast tubular pile construction 5, wherein the pile top is 30-50 cm higher than the surface of the foundation soil.
And thirdly, paving a 20 cm-thick gravel cushion layer 4 on the surface layer of the foundation soil, compacting the gravel cushion layer 4, and then erecting a template and pouring a concrete beam 2 above the gravel cushion layer 4. The concrete beam 2 is connected with the precast tubular pile 5 through a reinforcement cage. In this example, the concrete beam 2 and the air bubble mixed lightweight soil plate 3 are in a step-like lap joint form, and thus the lap joint position of the concrete beam 2 is cast in a step-like shape.
And fourthly, after the concrete beam 2 is poured, pouring the bubble mixed light soil plate 3 in situ, arranging a steel reinforcement framework at the lap joint position, and arranging a steel reinforcement truss inside the bubble mixed light soil plate 3.
And fifthly, after the bubble mixed light soil plate 3 is poured, paving the embankment filling soil 1 in layers, and compacting the embankment filling soil in layers until the filling soil reaches the designed elevation of the embankment.
Claims (10)
1. The roadbed pile plate structure for controlling roadbed settlement is characterized by comprising embankment filled soil (1), a concrete beam (2), a bubble mixed light soil plate (3), a broken stone cushion layer (4) and a precast tubular pile (5), wherein the concrete beam (2) and the bubble mixed light soil plate (3) are lapped to form a combined slab layer, the broken stone cushion layer (4) is positioned below the combined slab layer, the embankment filled soil (1) is positioned above the combined slab layer, and the precast tubular pile (5) penetrates through the broken stone cushion layer (4) and is connected with the bottom of the concrete beam (2); the concrete beams (2) are distributed in a grid shape along the transverse direction and the longitudinal direction of the roadbed in a staggered mode, and grid points of the concrete beams are located at the top of the precast tubular pile (5); the bubble mixed light soil plate (3) is laid in the grid of the concrete beam (2), and the top surface of the bubble mixed light soil plate is flush with the top surface of the concrete beam (2).
2. A roadbed pile plate structure for controlling roadbed settlement according to claim 1, characterized in that the cross section of the joint of the concrete beam (2) and the air bubble mixed light soil plate (3) is in a step shape or a slope shape.
3. A roadbed pile plate structure for controlling roadbed settlement according to claim 1, wherein the overlap length of the concrete beam (2) and the air bubble mixed lightweight soil plate (3) is not less than 0.3m and not less than
Wherein L is the top surface width of the bubble mixed light soil plate (3), and B is the bottom surface width of the concrete beam (2).
4. A roadbed pile plate structure for controlling roadbed settlement according to claim 1, wherein a steel reinforcement framework is arranged at the lap joint of the bubble mixed light soil plate (3) and the concrete beam (2), the steel reinforcement framework comprises two layers of steel reinforcement meshes which are parallel to each other and a steel reinforcement cage arranged between the steel reinforcement meshes, and the steel reinforcement meshes and the steel reinforcement cage are connected through steel wire binding.
5. A pile-plate structure for roadbed to control roadbed settlement according to claim 4, wherein the mesh of the reinforcing mesh is 3-5 cm square, and the distance between two adjacent steel wire binding positions is 10-15 cm.
6. The roadbed pile plate structure for controlling the roadbed settlement according to claim 1, wherein the pile spacing of the precast tubular pile (5) is 1.0-2.0 m, and the pile diameter is not less than 0.4 m.
7. The roadbed pile plate structure for controlling the roadbed settlement according to claim 1, wherein the design strength of the bubble mixed light soil plate (3) is 0.6-2.0 MPa.
8. A pile-plate structure for roadbed for controlling roadbed settlement according to claim 1, wherein the bubble mixed light soil plate (3) is internally provided with a steel mesh or a steel truss.
9. The roadbed pile slab structure for controlling the subgrade settlement according to the claim 1, characterized in that the concrete beam (2) is a cast-in-place beam, and the bubble mixed lightweight soil slab (3) is a cast-in-place slab or a precast slab.
10. The roadbed pile plate structure for controlling the roadbed settlement according to claim 1, wherein the single-layer casting thickness of the bubble mixed light soil plate (3) is 0.5-0.8 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123163688.XU CN216999110U (en) | 2021-12-16 | 2021-12-16 | Roadbed pile plate structure for controlling roadbed settlement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123163688.XU CN216999110U (en) | 2021-12-16 | 2021-12-16 | Roadbed pile plate structure for controlling roadbed settlement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216999110U true CN216999110U (en) | 2022-07-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123163688.XU Active CN216999110U (en) | 2021-12-16 | 2021-12-16 | Roadbed pile plate structure for controlling roadbed settlement |
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| Country | Link |
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| CN (1) | CN216999110U (en) |
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2021
- 2021-12-16 CN CN202123163688.XU patent/CN216999110U/en active Active
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