CN210104461U - Roadbed structure of light soil roadbed combined with steel pipe pile - Google Patents
Roadbed structure of light soil roadbed combined with steel pipe pile Download PDFInfo
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- CN210104461U CN210104461U CN201920327601.1U CN201920327601U CN210104461U CN 210104461 U CN210104461 U CN 210104461U CN 201920327601 U CN201920327601 U CN 201920327601U CN 210104461 U CN210104461 U CN 210104461U
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Abstract
The utility model provides a roadbed structure of a light soil roadbed combined with a steel pipe pile, which relates to the technical field of building construction, and comprises a first step structure, a steel pipe pile and a light concrete layer; the first step structure is formed on the surface of the slope; the steel pipe piles are multiple and are respectively fixed on the first step structure; and the light concrete layer is poured on the first step structure and the steel pipe pile. By adopting the mode of combining the steel pipe piles and the lightweight concrete, the steel pipe piles can improve the anti-sliding performance of the roadbed structure of the lightweight soil roadbed combined with the steel pipe piles, effectively relieve the problems of stability, differential settlement and lateral deformation of steep slopes and high-fill roadbed dikes, and the roadbed structure of the lightweight soil roadbed combined with the steel pipe piles can be applied to filling of steep slopes and high-fill roadbeds.
Description
Technical Field
The utility model belongs to the technical field of the construction technology and specifically relates to a roadbed structure of light dirt road bed combination steel-pipe pile is related to.
Background
The light foam concrete is a new light filling material developed in recent years in the field of civil engineering, and is a light material formed by utilizing a physical method to prepare foaming agent aqueous solution into foam, mixing and stirring the foam with cement-based cementing material, water, aggregate, admixture and additive according to a certain proportion and hardening through physicochemical action.
The construction method of the foam lightweight concrete pouring road base disclosed in patent CN102383352A is as follows: and adopting a partition staggered pouring method for the roadbed. A row of templates are arranged at a certain distance along the longitudinal direction of the roadbed from one side of the roadbed to the other side of the roadbed, n rows of templates are arranged in total, and the templates are numbered from one side of the roadbed to the other side of the roadbed. Pouring light foam concrete on the pouring belts with odd numbers until all the pouring belts with odd numbers are poured; and then removing the templates with the even numbers, and then pouring the foam lightweight concrete on the pouring belts with the even numbers until all the pouring belts with the even numbers are poured.
However, the light soil filling method in the prior art is not suitable for filling steep slopes and high fill subgrades.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a light dirt road bed combines roadbed structure of steel-pipe pile to the light soil filling method who solves among the prior art is not applicable to the technical problem of the filling of abrupt slope and high fill road bed.
The utility model provides a roadbed structure of a light soil roadbed combined with steel pipe piles, which comprises a first step structure, steel pipe piles and a light concrete layer;
the first step structure is formed on the surface of the slope;
the steel pipe piles are multiple and are respectively fixed on the first step structure;
and the light concrete layer is poured on the first step structure and the steel pipe pile.
Further, the roadbed structure of the light soil roadbed combined with the steel pipe pile further comprises a second step structure;
the second step structure is formed on the surface of the side slope;
and a plurality of steel pipe piles are fixed on the second step structure, and the light concrete layer is poured on the second step structure and the steel pipe piles.
Furthermore, small stone concrete is arranged in the steel pipe pile.
Furthermore, a plurality of settlement joints are arranged on the lightweight concrete layer;
along the longitudinal direction of the roadbed structure combining the light soil roadbed with the steel pipe piles, a plurality of settlement joints are uniformly arranged at intervals; and polystyrene plates are filled in the settlement joints.
Further, the width of each settling seam is 1cm, and the distance between every two adjacent settling seams is 20 m.
Further, the roadbed structure of the light soil roadbed combined with the steel pipe pile further comprises a geomembrane; the geomembrane is arranged on the upper surface of the light concrete layer.
Further, the thickness of the geomembrane is 0.5 mm.
Further, the roadbed structure of the light soil roadbed combined with the steel pipe pile further comprises a metal net; the metal mesh is arranged in the lightweight concrete layer.
Further, two layers of metal nets are arranged in the area from the top of the light concrete layer on the first step structure to 1m below the top of the light concrete layer.
The utility model provides a roadbed structure of a light soil roadbed combined with steel pipe piles, which comprises a first step structure, steel pipe piles and a light concrete layer; the first step structure is formed on the surface of the slope; the steel pipe piles are multiple and are respectively fixed on the first step structure; and the light concrete layer is poured on the first step structure and the steel pipe pile. The mode that the steel pipe pile and the lightweight concrete are combined is adopted, the anti-sliding performance of the roadbed structure of the lightweight soil roadbed combined with the steel pipe pile is improved, the stability problem, the differential settlement problem and the lateral deformation problem of a steep slope and a high-fill roadbed are effectively relieved, and the roadbed structure of the lightweight soil roadbed combined with the steel pipe pile can be applied to filling of the steep slope and the high-fill roadbed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a plan view of a roadbed structure of a light soil roadbed combined with a steel pipe pile provided by the embodiment of the utility model;
fig. 2 is a schematic structural view of a steel pipe pile on a first step structure in a roadbed structure of a lightweight roadbed combined with the steel pipe pile provided by the embodiment of the utility model;
fig. 3 is a schematic structural view of a steel pipe pile on a second step structure in a roadbed structure of a lightweight roadbed combined with the steel pipe pile provided by the embodiment of the utility model;
fig. 4 is a sectional view of a roadbed structure of a light soil roadbed combined with a steel pipe pile provided by the embodiment of the utility model;
fig. 5 is a schematic structural view of a slope and a side slope in a roadbed structure of a light soil roadbed combined with a steel pipe pile provided by the embodiment of the utility model;
fig. 6 is a construction flow chart of light concrete in the roadbed structure of the light soil roadbed combined with the steel pipe pile provided by the embodiment of the utility model.
Icon: 1-steel pipe pile; 2-light concrete layer; 3-settlement joint; 4-small pebble concrete; 5-a first step structure; 6-concrete foundation; 7-road surface; 8-geomembrane; 9-metal mesh; 10-slope surface; 11-side slope.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that, as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the indicated orientation or positional relationship thereof is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, but does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, as may be used herein, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The utility model provides a light dirt road bed combines roadbed structure of steel-pipe pile, it is right to give a plurality of embodiments below the utility model provides a light dirt road bed combines roadbed structure of steel-pipe pile to carry out detailed description.
The roadbed structure combining the light soil roadbed and the steel pipe pile, which is provided by the embodiment, as shown in fig. 1 to 6, comprises a first step structure 5, a steel pipe pile 1 and a light concrete layer 2; the first step structure 5 is formed on the surface of the slope 10; the steel pipe piles 1 are multiple, and the steel pipe piles 1 are respectively fixed on the first step structure 5; and a lightweight concrete layer 2 is poured on the first step structure 5 and the steel pipe pile 1.
According to the roadbed structure combining the light soil roadbed and the steel pipe piles, after a first step structure 5 is formed on the surface of a slope 10, a plurality of steel pipe piles 1 are fixed on the first step structure 5, and light concrete is poured on the first step structure 5 and the steel pipe piles 1 to form the roadbed structure combining the light soil roadbed and the steel pipe piles, and a road surface 7 can be arranged on the light concrete layer 2. By adopting the mode that the steel pipe pile 1 is combined with the lightweight concrete, the steel pipe pile 1 can improve the anti-sliding performance of the roadbed structure of the lightweight soil roadbed combined with the steel pipe pile, effectively relieve the stability problem, differential settlement problem and lateral deformation problem of a steep slope and a high-fill roadbed, and ensure that the roadbed structure of the lightweight soil roadbed combined with the steel pipe pile can be applied to the filling of the steep slope and the high-fill roadbed.
The roadbed structure combining the light soil roadbed with the steel pipe piles provided by the embodiment is applied to special rock and soil areas, and provides a basis for processing filled roadbeds with large foundation rigidity difference and expansibility. The roadbed foundation can be applied to vertical filling, the vertical filling can avoid or reduce the removal of buildings, the land acquisition quantity required by the reconstruction and expansion project is greatly reduced, and precious land resources are saved.
Specifically, the first step structure 5 is arranged according to the cross section topography of each mileage of the roadbed structure combining the light soil roadbed and the steel pipe pile, the width of each step of the first step structure 5 in the horizontal direction is 3m, the vertical height of each step of the first step structure changes according to the change of the topography, the horizontal gradient of each step is opposite to the direction of 10 slope surfaces of the cross section, and the gradient is 2%. When the first step structure 5 is dug, the digging can be performed from bottom to top.
The light concrete layer 2 is poured in a layered hole-dividing symmetrical mode, construction of the first layer of each construction area is firstly carried out, and the maximum construction thickness of each layer cannot exceed 80 cm; the minimum construction thickness is not less than 30cm, and when the air bubble mixed lightweight concrete is filled, air bubbles can be compressed and defoamed due to the influence of the self weight of the air bubble mixed lightweight concrete. Therefore, the filled air-bubble-mixed lightweight concrete may be contracted to increase the bulk density, and the optimal construction thickness of the lightweight concrete is 50cm according to a large number of tests and construction experiences. The pouring operation of the upper layer should be carried out after the final setting of the next layer, and the outlet of the pumping pipe should be kept horizontal with the pouring surface in the pouring process, so that the pouring is not suitable for adopting a spraying mode.
In the step 2 of pouring the light concrete layer, the newly-mixed bubble mixed light concrete is pumped by adopting a pipe, a uniform bubble group is prepared by a foaming device, the density detection of the bubble group is carried out on site before each shift of operation, the allowable deviation is 48-52 g/L, the bubble group and cement slurry are uniformly stirred by a stirring device to prepare the bubble mixed light concrete, the bubble group is uniformly mixed with the cement slurry in time, the allowable range of 550-650 g/L volume weight and 160-200 mm fluidity are controlled on the newly-mixed bubble mixed light.
Pouring the light concrete from one end to the other end along the long axis direction of the pouring area; if more than one pouring tube is adopted for pouring, pouring can be started from one end side by side, or a diagonal pouring mode is adopted: in the casting process, when the casting tube needs to be moved, the casting tube is required to move back and forth along the placing direction of the casting tube, and the casting tube is not required to move left and right; if the pouring tube is required to move left and right, the pouring tube is moved after being lifted out of the surface of the currently poured light soil as much as possible; when pouring, the discharge hole should be buried in the foam light soil. When the surface is swept, the pouring gate is kept horizontal as much as possible, and the distance between the pouring gate and the surface of the currently poured light soil is as low as possible; the discharge port is not suspended during the casting process. When the pouring pipe is moved, the sample is taken from the discharge port, the surface is swept flat or the redundant foam in the pouring area needs to be dispersed, the height difference between the discharge port and the current foam light soil flowing surface is preferably controlled within 1 m.
By implementing the vertical pouring method, the stress can be greatly saved, the land acquisition quantity is reduced, the construction cost is reduced, and the construction period is shortened.
When the construction area of the lightweight concrete is more than 500 square meters, a grid construction mode is required during construction.
Furthermore, the roadbed structure of the light soil roadbed combined with the steel pipe pile also comprises a second step structure; the second step structure is formed on the surface of the side slope 11; a plurality of steel pipe piles 1 are fixed on the second step structure, and a light concrete layer 2 is poured on the second step structure and the steel pipe piles 1.
Specifically, when there are side slopes 11 on both sides of the slope surface 10, a second step structure may be formed on the upper surface of the side slope 11, a plurality of steel pipe piles 1 may be fixed to the second step structure, and lightweight concrete may be poured onto the second step structure and the steel pipe piles 1 on the second step structure, and the lightweight concrete layer 2 may be used to provide a protective panel.
The way of casting the lightweight concrete layer 2 is the same as the lightweight concrete layer 2 on the first step structure 5, and the description thereof is omitted.
During construction, the second step structure is excavated in the longitudinal section direction according to the filling height of each section, the excavation sequence is from top to bottom, and the width of each step in the horizontal direction is an integral multiple of 0.9 m.
The plurality of steel pipe piles 1 are dispersedly arranged on the first step structure 5 and the second step structure, wherein the plurality of steel pipe piles 1 may be arranged at an arbitrary suitable distance.
For example, the distance between the adjacent steel pipe piles 1 is approximately 3m in the lateral direction of the roadbed structure combining the steel pipe piles with the light soil roadbed, and the distance between the adjacent steel pipe piles 1 is approximately 1m in the longitudinal direction of the roadbed structure combining the steel pipe piles with the light soil roadbed, and the settlement joints 3 can be slightly adjusted.
On the first step structure 5, the embedding depth of each steel pipe pile 1 is set according to the actual situation, for example, the embedding depth of the steel pipe pile 1 on the first step structure 5 of the first layer is 2m, the exposed height is 1.5m, and the steel pipe piles 1 on the second step structure 5 of the second layer and above can be properly deepened to resist the effect that the roadbed structure of the light concrete light soil roadbed combined with the steel pipe piles slides and moves to the direction of the road shoulder; the pile diameter of each steel pipe pile 1 is 20cm, the steel pipe is made of Q345 and is 10mm thick, and C30 type small pebble concrete 4 is filled in the pipe.
On the second step structure, each steel pipe pile 1 is embedded in a drilled hole on the second step structure, and then concrete is poured into the hole on the second step structure; the embedment depth of each steel pipe pile 1 is set according to the actual situation, for example, the embedment depth of the steel pipe pile 1 on the first step structure 5 of the first layer is 2m, the exposed height is 1.5m, and the steel pipe piles 1 on the second step structure 5 of the second layer and above can be properly deepened to resist the effect that the roadbed structure of the lightweight concrete lightweight soil roadbed combined with the steel pipe piles slides and moves laterally towards the direction of the roadbed shoulder; the pile diameter of each steel pipe pile 1 is 20cm, the steel pipe is made of Q345 and is 10mm thick, and C30 type small pebble concrete 4 is filled in the pipe.
Furthermore, a plurality of settlement joints 3 are arranged on the light concrete layer 2; along the longitudinal direction of the roadbed structure combining the light soil roadbed with the steel pipe piles, a plurality of settlement joints 3 are uniformly arranged at intervals; the settlement joint 3 is filled with polystyrene boards, asphalt boards, wood board clips or asphalt flocks.
The extension direction of the settlement joint 3 is parallel to the transverse direction of the roadbed structure of the light soil roadbed combined steel pipe pile, one settlement joint 3 is arranged along the longitudinal direction of the roadbed structure of the light soil roadbed combined steel pipe pile at intervals of 20cm, the width of each settlement joint 3 is 1cm, and polystyrene plates are filled in each settlement joint 3.
Further, the roadbed structure of the light soil roadbed combined with the steel pipe pile further comprises a geomembrane 8; the geomembrane 8 is disposed on the upper surface of the lightweight concrete layer 2.
A layer of HDPE impermeable geomembrane 8 is arranged on the top surface of the light concrete layer 2, and the GH-1 type polyethylene geomembrane 8 is adopted, and the thickness is 0.5 mm.
Further, the roadbed structure of the light soil roadbed combined with the steel pipe pile further comprises a metal net 9; the metal mesh 9 is arranged in the lightweight concrete layer 2 to improve the anti-cracking performance of the roadbed structure of the lightweight roadbed combined with the steel pipe pile.
Two layers of galvanized wire nets with the diameter of 25mm (25 multiplied by 25mm) are arranged in the height range of 1m below the top of the light concrete layer 2; when the height of the light concrete layer 2 is more than 8m, a layer of galvanized wire netting with the diameter of 25mm (25 mm multiplied by 25mm) is additionally arranged in the middle of the light concrete layer 2.
The roadbed structure combining the light soil roadbed and the steel pipe pile comprises a first step structure 5, a steel pipe pile 1 and a light concrete layer 2; the first step structure 5 is formed on the surface of the slope 10; the steel pipe piles 1 are multiple, and the steel pipe piles 1 are respectively fixed on the first step structure 5; and a lightweight concrete layer 2 is poured on the first step structure 5 and the steel pipe pile 1. By adopting the mode that the steel pipe pile 1 is combined with the lightweight concrete, the steel pipe pile 1 can improve the anti-sliding performance of the roadbed structure of the lightweight soil roadbed combined with the steel pipe pile, effectively relieve the stability problem, differential settlement problem and lateral deformation problem of a steep slope and a high-fill roadbed, and ensure that the roadbed structure of the lightweight soil roadbed combined with the steel pipe pile can be applied to the filling of the steep slope and the high-fill roadbed.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (9)
1. A roadbed structure combining a light roadbed with a steel pipe pile is characterized by comprising a first step structure, the steel pipe pile and a light concrete layer;
the first step structure is formed on the surface of the slope;
the steel pipe piles are multiple and are respectively fixed on the first step structure;
and the light concrete layer is poured on the first step structure and the steel pipe pile.
2. The roadbed structure of the light soil roadbed combined with the steel pipe pile, according to claim 1, wherein the roadbed structure of the light soil roadbed combined with the steel pipe pile further comprises a second step structure;
the second step structure is formed on the surface of the side slope;
and a plurality of steel pipe piles are fixed on the second step structure, and the light concrete layer is poured on the second step structure and the steel pipe piles.
3. The roadbed structure of the light soil roadbed combined with the steel pipe pile according to claim 1 or 2, wherein small stone concrete is arranged in the steel pipe pile.
4. The roadbed structure of the light soil roadbed combined with the steel pipe pile, according to the claim 1 or 2, wherein a plurality of settlement joints are arranged on the light concrete layer;
along the longitudinal direction of the roadbed structure combining the light soil roadbed with the steel pipe piles, a plurality of settlement joints are uniformly arranged at intervals; and filling polystyrene boards, asphalt-filled wood boards, wood board clips or asphalt floc in the settlement joints.
5. The subgrade structure of the lightweight soil subgrade combined with the steel pipe pile, according to the claim 4, is characterized in that the width of the settlement joint is 1cm, and the distance between the adjacent settlement joints is 20 m.
6. The roadbed structure of the light soil roadbed combined steel pipe pile according to claim 1 or 2, wherein the roadbed structure of the light soil roadbed combined steel pipe pile further comprises a geomembrane; the geomembrane is arranged on the upper surface of the light concrete layer.
7. The subgrade structure of the lightweight soil subgrade combined with the steel pipe pile according to the claim 6, characterized in that the thickness of the geomembrane is 0.5 mm.
8. The roadbed structure of the light soil roadbed combined steel pipe pile according to claim 1 or 2, wherein the roadbed structure of the light soil roadbed combined steel pipe pile further comprises a metal net; the metal mesh is arranged in the lightweight concrete layer.
9. The roadbed structure of the light soil roadbed combined with the steel pipe pile, wherein two layers of metal nets are arranged in the area from the top to 1m below the top of the light concrete layer on the first step structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920327601.1U CN210104461U (en) | 2019-03-14 | 2019-03-14 | Roadbed structure of light soil roadbed combined with steel pipe pile |
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| CN201920327601.1U CN210104461U (en) | 2019-03-14 | 2019-03-14 | Roadbed structure of light soil roadbed combined with steel pipe pile |
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| CN210104461U true CN210104461U (en) | 2020-02-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109826066A (en) * | 2019-03-14 | 2019-05-31 | 广西双象建设工程有限责任公司 | A kind of road structure and construction method of light soil roadbed combination steel-pipe pile |
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2019
- 2019-03-14 CN CN201920327601.1U patent/CN210104461U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109826066A (en) * | 2019-03-14 | 2019-05-31 | 广西双象建设工程有限责任公司 | A kind of road structure and construction method of light soil roadbed combination steel-pipe pile |
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Address after: 530200 1st and 2nd floors of R & D and production workshop 1, No. 5, Nami Avenue, Yongning District, Nanning City, Guangxi Zhuang Autonomous Region Patentee after: Guangxi Beitou Traffic Maintenance Technology Group Co., Ltd Address before: 530000 Guang Minority Avenue 153, Qingxiu District, Nanning City, Guangxi Zhuang Autonomous Region Patentee before: GUANGXI SHUANGXIANG GEOTECHNICAL ENGINEERING Co.,Ltd. |
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