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Soft soil foundation road reconstruction and extension project supporting and retaining structure and construction method

A technology of soft soil foundation and retaining structure, which is applied in the direction of basic structure engineering, roads, roads, etc., can solve the problems of excessive settlement difference between old and new roadbeds, excessive lateral deformation of new roadbeds, etc., and achieve the elimination of uneven settlement and good Effect of ground treatment and reduction of additional stress

Pending Publication Date: 2021-06-11
SHANDONG UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a support structure and construction method for road reconstruction and expansion projects on soft soil foundations, which can solve the problems of excessive settlement difference between old and new roadbeds and problems in existing soft soil foundation reconstruction and expansion projects. The problem of excessive lateral deformation of the newly built roadbed, and the rational utilization of waste tires can be realized

Method used

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  • Soft soil foundation road reconstruction and extension project supporting and retaining structure and construction method
  • Soft soil foundation road reconstruction and extension project supporting and retaining structure and construction method
  • Soft soil foundation road reconstruction and extension project supporting and retaining structure and construction method

Examples

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Embodiment 1

[0049] This embodiment provides a support structure for road reconstruction and expansion projects on soft soil foundations, such as figure 1 As shown, it includes reinforced soil retaining wall, curtain pile 6, foundation pile and lightweight filler. The reinforced soil retaining wall is set on the outside of the newly built roadbed. The curtain pile 6 penetrates and widens the roadbed and foundation, and light filler is used for the back of the wall. backfill.

[0050]Further, the reinforced soil retaining wall includes a retaining wall panel 2 and a reinforcing strip 3, the retaining wall panel 2 is arranged vertically, and is used to support the retaining roadbed; the reinforcing strip 3 is used for lightweight filler reinforcement. like figure 2 As shown, the retaining wall panel 2 is composed of several panel blocks 10, and the height of the retaining wall panel 2 gradually increases with the increase of the filling height.

[0051] One end of the panel block 10 is pr...

Embodiment 2

[0067] This embodiment provides a construction method for the retaining structure of a road reconstruction and expansion project on a soft soil foundation, comprising the following steps:

[0068] Step 1: Prefabricate various components before construction, mainly including panel blocks 10, reinforcement strips 3, pipe piles 5, curtain piles 6 and middle tire fragments of tire soil filler 9.

[0069] Step 2: Level the site at the widened soft soil foundation, and excavate a 50cm trench.

[0070] Step 3: Excavate construction steps on the original roadbed slope, such as figure 1 As shown, the width of the construction steps is 2.5m and the height is 1.6m.

[0071] Step 4: Use mechanical drilling on the construction steps of the first and second floors, and cast in-situ CFG piles or plain concrete piles. The pile cross section is circular and the pile diameter is 0.8m.

[0072] Step 5: Construct pile holes on the widened soft soil foundation, lay out the pile position, hoist t...

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Abstract

The invention discloses a soft soil foundation road reconstruction and extension project supporting and retaining structure and a construction method. According to the technical scheme, the soft soil foundation road reconstruction and extension project supporting and retaining structure comprises a reinforced soil retaining wall, blind piles, foundation piles and light filler; the reinforced soil retaining wall comprises a retaining wall panel used for supporting and retaining a roadbed and reinforced strips used for reinforcing the light filler; the reinforced strips are arranged in the height direction and the length direction of the retaining wall panel at intervals; the blind piles are arranged on one side of the retaining wall panel; the foundation piles are arranged on the sides, away from the reinforced soil retaining wall, of the blind piles and comprise pipe piles used for foundation treatment of a soft soil foundation widening part and reinforcing piles used for reinforcing a foundation below a construction step; and the light filler comprises foam light soil filler arranged at the bottom of the roadbed, and tire soil filler is arranged above the foam light soil filler. The problems that in an existing soft soil foundation reconstruction and extension project, differential settlement of a new roadbed and an old roadbed is too large, and lateral deformation of the newly-built roadbed is too large can be solved, and waste tires can be reasonably utilized.

Description

technical field [0001] The invention relates to the field of road reconstruction and expansion projects, in particular to a support structure and construction method for road reconstruction and expansion projects on soft soil foundations. Background technique [0002] The key technology of road expansion is how to reduce the differential settlement of old and new roadbeds and reduce the lateral deformation of new roadbeds. In engineering construction, if a soft soil foundation is encountered, due to its low bearing capacity and easy deformation, it is difficult to meet the engineering requirements, and foundation treatment must be carried out. The two key issues to be solved in the treatment of soft soil foundations are foundation deformation and foundation stability. When expanding existing soft foundation roads, there will inevitably be mutual influence between the old and new roadbeds. deal with the core of the problem. Secondly, due to the weakness of the soil on soft ...

Claims

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Application Information

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IPC IPC(8): E02D29/02E01C3/00E01C3/04E02D17/20
CPCE02D29/0266E01C3/00E01C3/04E02D17/20E01C3/003E02D17/207
Inventor 张宏博刘明朋杨强吴建清江坦坦王昊姜东东宋修广张昕毅
Owner SHANDONG UNIV
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