CN109914173B - Foam light soil pouring table back structure in expressway reconstruction and extension project and construction method thereof - Google Patents
Foam light soil pouring table back structure in expressway reconstruction and extension project and construction method thereof Download PDFInfo
- Publication number
- CN109914173B CN109914173B CN201910234599.8A CN201910234599A CN109914173B CN 109914173 B CN109914173 B CN 109914173B CN 201910234599 A CN201910234599 A CN 201910234599A CN 109914173 B CN109914173 B CN 109914173B
- Authority
- CN
- China
- Prior art keywords
- layer
- soil
- pouring
- steps
- light soil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Road Paving Structures (AREA)
Abstract
The invention relates to a construction method for pouring a platform back in a highway reconstruction and extension project by using foamed lightweight soil. The substrate was first cleaned and compacted and rubble 30cm thick was laid. The step is arranged on one side close to the road center line along the road traveling direction and along the cross section direction, the convex step is poured by using a template to support one side close to the side slope, and the step is arranged to facilitate the better lap joint of the foam light soil and the roadbed soil. And laying waterproof geomembranes on the bottommost layer and the topmost layer of the foamed light soil structure. Geocells were laid 50cm from the bottom and top layers, respectively, to increase overall strength. According to the construction method, under the condition that the area of the platform back is small and is not beneficial to large-scale instrument construction, the construction process can be simplified, the operation is convenient, the characteristics of quick formation and good integrity of early strength of the foamed light soil are utilized, the dependence on the lateral edge-covered soil can be reduced, and the construction method is only required to be carried out by using a template for supporting and pouring. The construction method has a good effect on reducing the bumping at the bridge head.
Description
Technical Field
The invention belongs to the field of road engineering, and particularly relates to a foam lightweight soil pouring platform back structure in expressway reconstruction and expansion engineering and a construction method thereof.
Background
With the increase of traffic volume, more and more expressways begin to implement reconstruction and expansion projects, and for abutment back filling projects in the reconstruction and expansion of expressways, how to reduce differential settlement between an abutment and a road surface at a joint part is important, so that the problem of 'vehicle bump at the bridge head' is effectively reduced. The traditional table back backfill material mostly adopts gravel, but the fluidity and the strength of the traditional table back backfill material need to be improved. In addition, in the construction process of the traditional method, because the distance between the platform back and the structure is too close and the working surface is narrow, the platform back becomes a weak link which is difficult to compact mechanically, so that the compaction is insufficient or poor in uniformity, the compaction stability and the strength of the parts are difficult to ensure, large settlement or residual deformation is generated after work, the road surface quality is poor, the service performance and the service life cannot meet the design expectation, and even the subgrade is damaged due to instability in severe cases. The reinforced foam light soil is used for construction in the process of widening the expressway described in patent CN108755320A, and structurally, the applicable structure of the patent is a widened roadbed part in the process of reconstructing and expanding the expressway, but the construction method and the requirements of the construction method and the use method of a bench back backfill structure in the process of reconstructing and expanding the expressway are different from those of a construction method and a use method of a geocell. Thus, the inventors found that: the construction method can not effectively solve the construction problem of the back filling structure of the platform in reconstruction and extension of the expressway.
Disclosure of Invention
In order to overcome the problems, the invention provides a foam lightweight soil pouring table back structure in expressway reconstruction and expansion engineering and a construction method thereof. By using the construction method, the construction of the back filling in the reconstruction and extension project of the expressway is more definite, simple and operable, and the problem of 'vehicle jump at the bridge head' can be obviously improved by using the new material of the foamed lightweight soil.
The purpose of the invention is: at present, no systematic introduction exists on the construction method of the foam light soil for widening the abutment in the roadbed, the relevant specifications of the foam light soil only simply introduce the treatment method for widening the roadbed and the bridge head road section, but the inventor discovers a plurality of new problems in the construction for widening the abutment in the roadbed, and the prior art has no better solution. Therefore, the main innovation points of the present application are: the orderly and simple construction method is provided for the pouring of the platform back structure of the foamed lightweight soil in the reconstruction and expansion of the expressway. The specific method comprises the following steps: the steps are directly made at the lap joint of the old and new roadbeds along the cross section direction, but the side close to the side slope is supported by the template to form the steps in the pouring process of the foam lightweight soil, and the steps are directly made at the end far away from the abutment in the driving direction, so that the foam lightweight soil and the part of the soil embankment can be well lapped by the steps at the three positions.
In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:
a foam light soil pouring table back structure in highway reconstruction and extension projects and a construction method thereof comprise the following steps:
measuring and designing the sizes of steps of the cross section and the longitudinal section to be excavated on the roadbed of the road bridge transition section on site;
excavating corresponding sections according to the designed dimensions, removing surface soil of the foundation, and sequentially paving a permeable cushion layer and a waterproof geomembrane;
the bridge abutment, the first step and the lateral template form a first layer of pouring area, foam light soil is poured, and when the first layer of pouring thickness is 50cm, a high-strength geocell is laid; after the first layer of pouring is finished and hardened and formed, laying a second layer of template, constructing a second layer of pouring area and the like;
and after the foam light soil is completely poured, performing edge covering soil treatment.
Because differential settlement exists between the bridge abutment and the road surface at the joint and between the new roadbed and the old roadbed, the traditional step excavation method is difficult to meet the construction requirements. For this reason, the present application finds through system analysis and experimental investigation: the steps are arranged in the two directions of the cross section and the longitudinal section simultaneously to form an embedded structure, so that the contact surfaces of the abutment, the road surface at the joint and the new and old roadbed can be effectively increased, the frictional resistance and the shear strength of the abutment, the road surface at the joint and the joint surface of the new and old roadbed are enhanced, the effective combination and the integrity of the abutment and the new and old roadbed are ensured, and the differential settlement and the horizontal displacement between the abutment and the new and old road surface are effectively reduced.
The change of step size has very big influence to the road, and in some embodiments, this application through finite element analysis abutment and the road surface of junction, the influence of step size between new and old road surface to horizontal displacement and settlement, the aspect ratio of preferred step is 1: the value of x and x is 1.5-2, so that the differential settlement and horizontal displacement between the bridge abutment and the road surface at the joint and between the new roadbed and the old roadbed can be effectively reduced.
In some embodiments, the length of the base along the traveling direction is greater than 3m, so as to ensure that the steps in the two directions of the cross section and the longitudinal section have enough supporting force to reduce the differential settlement and the horizontal displacement between the bridge abutment and the road surface at the junction and between the new roadbed and the old roadbed.
In the current pouring process of foamed lightweight soil, a pouring area is generally formed by a clay edge covering method and the like, but the research of the application finds that: the method has the advantages that the convex steps are supported and poured by the template at one side close to the side slope along the cross section direction, a pouring area can be effectively formed, a good pouring effect is obtained, the method is simple and efficient, and the construction cost is lower.
In some embodiments, the template may be a wood or plastic plate.
In some embodiments, the casting area has the widest casting width at the bottom and the narrowest casting width at the top.
In some embodiments, the pouring width of the uppermost layer is aligned with the outer edge of the hard road shoulder of the widened part, each layer from the uppermost layer to the bottommost layer is increased by 0.5-1m, and the width of the bottommost layer is calculated according to the layer number, so that the excavation and treatment of the step of the joint part can be effectively utilized to separate laminar stagnant flow and eliminate the settlement of the roadbed, and the settlement reflected to the top of the road surface is minimized.
In some embodiments, the water permeable underlayment is laid out of graded crushed stone.
In some embodiments, the single-layer pouring height of the foamed lightweight soil is 0.3-0.8m, and the next layer of operation is performed after the last layer of operation is finally set, wherein the interval time is not less than 8 h.
In some embodiments, the foamed lightweight soil consists of cement, red mud, water, and a foaming agent. The invention adopts foamed light soil to carry out table back backfilling. The preparation of the foamed light soil is to uniformly add foams into cement slurry by adopting a compressed air method, thereby obtaining the foamed light soil with lightness, good fluidity and high strength, and effectively reducing differential settlement between the abutment and the road surface at the joint.
In some embodiments, the wet density of the foamed lightweight soil is controlled at 800kg/m3-1100kg/m3And the flow value is controlled to be 17-19 cm.
The invention has the beneficial effects that:
(1) according to the construction method, under the condition that the area of the platform back is small and is not beneficial to large-scale instrument construction, the construction process can be simplified, the operation is convenient, the characteristics of quick formation and good integrity of early strength of the foamed light soil are utilized, the dependence on the lateral edge-covered soil can be reduced, and the construction method is only required to be carried out by using a template for supporting and pouring. In addition, the earthwork standard cells are laid at the road and bridge connecting section, so that the overall bearing capacity of the roadbed can be enhanced, the uneven settlement is reduced, and the problem of 'bumping at the bridge head' is solved.
(2) The construction method for backfilling the abutment back in the reconstruction and extension of the expressway, which is disclosed by the invention, can be used for facilitating construction, enhancing operability and accelerating the construction process.
(3) The operation method is simple, low in cost, universal and easy for large-scale production.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is a schematic structural view of a platform back in highway reconstruction and expansion in embodiment 1;
FIG. 2 is a drawing of the geocell layout during construction according to example 1;
FIG. 3 is a cast-in-place construction drawing of example 1;
FIG. 4 is a schematic view of the site after completion of construction in example 1;
FIG. 5 is a table back backfill structure model according to example 2;
FIG. 6 is a comparison of the surface settlement of the foamed lightweight soil of example 2 with that of a conventional road subgrade;
fig. 7 is a comparison of the horizontal displacement of the surface of the foamed lightweight soil of example 2 with that of a conventional road bed, in which 1. steps in the direction of cross section, 2. steps in the direction of travel, 3. first-layer forms, 4. regions for pouring the foamed lightweight soil, 5 embankment backfill, 6. abutment, 7. lightweight soil, 8. silty clay, and 9. gravelly soil.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
As introduced by the background art, the method aims at solving the problems that in the construction process, because the platform back is too close to a structure and the working surface is narrow, the platform back becomes a weak link which is difficult to compact mechanically, so that the compaction is insufficient or poor in uniformity, the compaction stability and strength of the parts are difficult to ensure, large settlement or residual deformation is generated after construction, the road surface quality is poor, the service performance and the service life cannot meet the design expectation, and even the roadbed is damaged in serious cases. Therefore, the invention provides a foam lightweight soil pouring table back structure in highway reconstruction and extension projects and a construction method thereof, and the foam lightweight soil pouring table back structure comprises the following steps:
step one, firstly, the width and the height of a roadbed at the road section back of a platform are widened through field measurement, the step sizes of cross sections and longitudinal sections to be excavated by the roadbed at the road bridge transition section are designed according to the field construction requirements and the construction specifications of foam light soil, the number of layers of steps is set according to the height of the roadbed, and the height-width ratio of the steps is 1: x, the value of x is 1.5-2, and the length of the base along the traveling direction is more than 3 m; and (3) supporting and pouring the convex step by using a baffle on one side close to the side slope along the cross section direction, namely, the pouring width of the bottommost layer is widest, the pouring width of the uppermost layer is narrowest, the pouring width of the uppermost layer is aligned with the outer edge of the hard road shoulder of the widened part, each layer from the uppermost layer to the bottommost layer is increased by 0.5-1m, and the width of the bottommost layer is calculated according to the number of layers.
And step two, excavating a section on site according to the requirements of the step one, removing the surface soil of the base by 30cm, paving graded broken stones to serve as a permeable cushion layer, paving a waterproof geomembrane after fully compacting, and paving geocells at positions 50cm away from the bottom layer and 50cm away from the top layer when pouring the foamed light soil so as to enhance the overall connectivity.
And step three, forming a first layer pouring area by the abutment, the first layer of steps and the lateral baffle, laying a second layer of template on the first layer of foundation after the first layer of pouring is finished, and repeating the steps.
And step four, pouring the foamed lightweight soil in a layered mode, wherein the height of a single layer is preferably 0.3-0.8m, after the single-layer pouring is finished, the next layer of operation is carried out after the last layer of operation is finally solidified, and the interval time is not less than 8 hours.
And fifthly, after the foam light soil is poured for 8 hours, laying a second layer of waterproof geomembrane on the surface of the foam light soil, and well performing protection work.
And step six, after the foamed light soil is hardened and formed, edge covering soil treatment can be carried out.
The invention relates to a foam light soil pouring platform back structure in highway reconstruction and extension engineering and a construction method thereof, wherein the wet density of the foam light soil is controlled to be 800kg/m3-1100kg/m3。
The flow value of the foamed light soil is controlled to be 17-19 cm by using the foamed light soil pouring platform back structure in the expressway reconstruction and extension project and the construction method thereof.
According to the construction method for pouring the abutment back in the highway reconstruction and expansion project by using the foamed light soil, the waterproof geomembranes are laid at the bottom and the top of the foamed light soil structure to prevent rainwater and underground water from permeating, and the geocells are laid in the foamed light soil structure, so that the integral bearing capacity is enhanced, the uneven settlement can be reduced, and the problem of 'bumping at the bridge head' is effectively solved as shown in figure 2.
The foam lightweight soil pouring platform back structure in the highway reconstruction and extension project and the construction method thereof provided by the invention have the advantages that local materials are obtained, the local industrial waste red mud is fully utilized, the cement consumption is reduced, the cost is reduced, and the condition that the red mud is stacked to pollute the environment is reduced.
The construction method for pouring the platform back in the highway reconstruction and expansion project by using the foamed lightweight soil has stronger operability and is convenient for construction under the condition that the construction operation surface of the backfill place of the platform back in the highway reconstruction and expansion project is narrow and is not beneficial to the construction of large-scale instruments.
Example 1:
firstly, measuring the width and height of a roadbed at the back of a road section in a widened way on site, designing the sizes of steps of a cross section and a longitudinal section to be excavated by the roadbed at a joint part by combining site construction requirements and construction specifications of foamed light soil, wherein the height from the bottom of a foundation pit at the back of the road to the original road surface is 4.85m, the height of a roadbed and the height of a road surface are reserved at the upper part along the traveling direction, namely 2.05m (the roadbed is 1.2m, and the thickness of the road surface is 0.85m), 4 layers of steps are arranged along the traveling direction, each layer of steps is 0.7m high and 1.4m wide, and the width of the base from the back of the road to the first layer of steps along the traveling direction is 4.5 m; along the cross section direction, set up 4 layers of steps near the central line of the way, every layer of step height is 0.7m, and width is 1.4m, and the side that is close to the side slope will pour out the convex type step with the template support, and the bottommost is poured the width and is 10m, and the topmost is poured the width and is 7.5, and the width of pouring of the topmost will be aligned with the hard way shoulder outward flange of broadening part, and the topmost to bottommost each layer increases progressively 0.83 m.
And step two, excavating a section on the site according to the requirements of the step one, removing the surface soil of the base by 30cm, paving graded broken stones to serve as a permeable cushion layer, paving a waterproof geomembrane after fully compacting, and paving geocells at positions 50cm away from the bottom layer and 50cm away from the top layer to enhance the overall connectivity when pouring the foamed light soil, as shown in figure 2.
And step three, forming a first layer pouring area by the abutment, the first layer of steps and the lateral templates, laying a second layer of templates on the first layer of foundation after the first layer of pouring is finished, and the like.
Step four, pouring the foamed lightweight soil in a layered mode, wherein the height of a single layer is preferably 0.3-0.8m, after the single-layer pouring is finished, the next layer of operation is carried out after the last layer of operation is finally solidified, and the interval time is not less than 8h, as shown in fig. 3.
And fifthly, after the foam light soil is poured for 8 hours, laying a second layer of waterproof geomembrane on the surface of the foam light soil, and well performing maintenance work.
And step six, after the foamed light soil is hardened and formed, edge covering soil treatment can be carried out, as shown in figure 4.
Example 2
1. The table back backfill structure model is shown in figure 5,
the numerical simulation model is as shown in fig. 5, and the thicknesses of the structural layers are shown in fig. 5, and the groundwater level is 4m below the surface of the earth. When the consolidation settlement of the embankment filling is simulated, a layered filling simulation method is adopted, one layer is loaded each time, the thickness of each layer is 0.7m, then a second layer is loaded, and the like. The total height of the embankment filling is 4.2m, wherein a section close to the abutment is filled with foam light soil materials, and a section far away from the abutment is filled with embankment soil.
2. Data result collation
(1) Settlement comparison of the foamed lightweight soil after 30 days of conventional soil filling (the density of the lightweight soil is 1.1 g/cm)3) As shown in fig. 6.
From the results, at the connecting part of the transition section of the road and bridge, steps are directly made at the lap joint of the old and new roadbeds along the direction of the cross section, the side close to the side slope is supported by a template to form the steps in the pouring process of the foam light soil, and the end far away from the abutment in the driving direction is directly made with the steps, so that the three steps are matched with the foam light soil in design, the maximum settlement of the roadbed surface generated by pouring of the foam light soil is 5cm within the range of 30m behind the platform back, and the maximum settlement of the roadbed surface generated by conventional filling is 9.4cm, therefore, on the three step structure of the invention, the pouring of the foam light soil on the platform back can obviously improve the phenomenon of 'vehicle jump at the bridge head';
as can be seen from fig. 7, in the design of the three steps of the present invention, the horizontal displacement of the roadbed surface at the connection of the bridge transition section is the largest, and the maximum values are respectively: 9mm of foamed light soil and 33mm of conventional filling soil; the horizontal displacement decreases with increasing distance from the table back.
The conventional method that steps are only arranged on the cross section or the longitudinal section and the foam lightweight soil pouring table back is tested shows that: the settlement of the roadbed surface is larger than the design of the three steps.
It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and the present invention is not limited thereto, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and equivalents can be made in the technical solutions described in the foregoing embodiments, or equivalents thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.
Claims (7)
1. A construction method for pouring a platform back in a highway reconstruction and extension project by using foamed lightweight soil is characterized by comprising the following steps:
measuring and designing the sizes of steps of the cross section and the longitudinal section to be excavated on the roadbed of the road bridge transition section on site; the height-width ratio of the steps is 1: x, the value of x is 1.5-2;
the pouring width of the uppermost layer is aligned with the outer edge of the hard road shoulder of the widened part, each layer from the uppermost layer to the bottommost layer is increased by 0.5-1m, and the width of the bottommost layer is calculated according to the number of layers;
excavating corresponding sections according to the designed dimension, removing soil on the surface layer of the foundation, sequentially paving a permeable cushion layer and a waterproof geomembrane, and paving geocells at positions 50cm away from the bottom layer and 50cm away from the top layer when pouring the foamed light soil; the bridge abutment, the first layer of steps and the lateral templates form a first layer of pouring area, foam light soil is poured, after the foam light soil is hardened and formed, a second layer of templates is laid, a second layer of pouring area is constructed, and the rest is done in the same way;
after the foam light soil is completely poured, performing edge covering soil treatment;
the foamed light soil is composed of cement, red mud, water and a foaming agent.
2. The method of claim 1, wherein the substrate has a length in the traffic direction of greater than 3 m.
3. The method of claim 1, wherein the steps are cut on a side of the transverse cross section adjacent to the midline and in the direction of travel, and the male steps are cast with formwork supports on a side adjacent to the side slope.
4. The method of claim 1, wherein the bottom most casting width is widest and the top most casting width is narrowest.
5. The method of claim 1, wherein the water permeable mat is laid from graded crushed stone.
6. The method of claim 1, wherein the single-layer pouring height of the foamed lightweight soil is 0.3-0.8m, and the next layer of operation is performed after the last layer of operation is finally set, and the interval time is not less than 8 h.
7. The method of claim 1, wherein the foamed lightweight soil has a wet density control of 800kg/m3-1100kg/m3And the flow value is controlled to be 17-19 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910234599.8A CN109914173B (en) | 2019-03-26 | 2019-03-26 | Foam light soil pouring table back structure in expressway reconstruction and extension project and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910234599.8A CN109914173B (en) | 2019-03-26 | 2019-03-26 | Foam light soil pouring table back structure in expressway reconstruction and extension project and construction method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109914173A CN109914173A (en) | 2019-06-21 |
| CN109914173B true CN109914173B (en) | 2020-03-27 |
Family
ID=66966932
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910234599.8A Active CN109914173B (en) | 2019-03-26 | 2019-03-26 | Foam light soil pouring table back structure in expressway reconstruction and extension project and construction method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109914173B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110485229B (en) * | 2019-07-30 | 2021-07-16 | 湖南交通国际经济工程合作有限公司 | Construction process for bubble mixed light soil |
| CN111139729A (en) * | 2020-01-14 | 2020-05-12 | 福建陆海工程勘察设计有限公司 | Combined treatment method for rear-jump of bridge platform |
| CN112047665B (en) * | 2020-08-06 | 2022-04-22 | 广东同创科鑫环保有限公司 | Construction method of red mud-based cast-in-situ light soil |
| CN112924656B (en) * | 2021-03-17 | 2022-11-18 | 哈尔滨工业大学 | Temperature-adjustable and pressure-adjustable foam light soil bubble attenuation testing device and method |
| CN113652923B (en) * | 2021-08-20 | 2023-01-06 | 广东省高速公路有限公司开阳扩建管理处 | Splicing method for rebuilding and expanding new and old road surfaces |
| CN113774744B (en) * | 2021-09-27 | 2022-11-11 | 广西北投交通养护科技集团有限公司 | Automatic pouring method and device for foam lightweight concrete |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020030533A (en) * | 2000-10-18 | 2002-04-25 | 최기출 | Lateral Movement Prevention Construction Method of Bridge Abutment for using Sheet piles |
| CN105401530A (en) * | 2015-12-18 | 2016-03-16 | 江苏兆通工程技术有限公司 | Structural layer of bridge abutment back and construction process thereof |
| CN107905089A (en) * | 2017-11-21 | 2018-04-13 | 中冶南方城市建设工程技术有限公司 | A kind of reinforcement platform back of the body for preventing bumping at bridge-head and its construction method |
| CN108755320A (en) * | 2018-08-27 | 2018-11-06 | 山东大学 | A kind of reinforcement Foam lightweight soil Widening Embankment structure and its construction method |
-
2019
- 2019-03-26 CN CN201910234599.8A patent/CN109914173B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020030533A (en) * | 2000-10-18 | 2002-04-25 | 최기출 | Lateral Movement Prevention Construction Method of Bridge Abutment for using Sheet piles |
| CN105401530A (en) * | 2015-12-18 | 2016-03-16 | 江苏兆通工程技术有限公司 | Structural layer of bridge abutment back and construction process thereof |
| CN107905089A (en) * | 2017-11-21 | 2018-04-13 | 中冶南方城市建设工程技术有限公司 | A kind of reinforcement platform back of the body for preventing bumping at bridge-head and its construction method |
| CN108755320A (en) * | 2018-08-27 | 2018-11-06 | 山东大学 | A kind of reinforcement Foam lightweight soil Widening Embankment structure and its construction method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109914173A (en) | 2019-06-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109914173B (en) | Foam light soil pouring table back structure in expressway reconstruction and extension project and construction method thereof | |
| CN101368383B (en) | Method for treating soft soil roadbed by artificial composite crust layer | |
| CN206902488U (en) | A kind of soft soil foundation high-filled embankment of effectively control settlement after construction | |
| CN103334357A (en) | Viaduct road embankment structure with lower pile foundation bearing platform extending in roadbed, and construction method | |
| CN110080051B (en) | Geotextile bag bridge type embankment structure and construction method thereof | |
| CN107119520A (en) | The soft base combined type of coastal tidal, which is changed, fills out structure and Treatment Methods | |
| CN111305027A (en) | Rapid repairing construction method and repairing structure for subsidence of karst area pavement | |
| CN114439267A (en) | Road structure transformed from super-huge independent underground garage and construction method thereof | |
| CN203334154U (en) | Embankment structure for preventing bearing platform of pile foundation from stretching in roadbed under viaduct | |
| CN214782984U (en) | Road repairing structure of sponge city | |
| CN206800092U (en) | The soft base combined type of coastal tidal, which is changed, fills out structure and Roadbed by offshore soft clay | |
| CN106836034B (en) | High-fill cover plate culvert flexible load shedding system and construction method | |
| CN109537389B (en) | EPS (expandable polystyrene) lower embankment structure and construction method thereof | |
| CN115652717A (en) | High-fill roadbed construction method | |
| CN113622238B (en) | Widened roadbed structure of expressway and construction method thereof | |
| CN213114142U (en) | Be used for old road to widen roadbed structure | |
| CN113529523A (en) | Soft foundation reinforcement treatment method based on highway engineering | |
| CN113265919A (en) | Combined widening reconstruction base layer based on old road pavement and construction method | |
| CN206127853U (en) | Adopt integral foundation structure's of grit stake dark bridge | |
| CN111622035A (en) | Existing road widening and transformation method for reservoir area based on symmetrical integral type overhanging structure | |
| CN206127852U (en) | Dark bridge of filling out bed course disconnect -type foundation structure is traded in adoption | |
| CN111287041A (en) | Novel soil retaining structure in limited space and construction process thereof | |
| CN217460120U (en) | Structure for preventing urban road subgrade from non-uniform settlement | |
| CN220888179U (en) | Bench back embankment and bridge head overlap joint structure for preventing bridge head from jumping | |
| CN213926292U (en) | Soft basic processing of road and excavation supporting joint construction |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |