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Composite foundation treatment method and application

A treatment method and composite foundation technology, which is applied in foundation structure engineering, construction, soil protection, etc., can solve the problem that the bearing capacity of the pile body and the soil between the piles cannot be fully exerted, the permeable rigid pile needs special processing, the pile body and the pile In order to control the post-construction settlement, reduce the length of piles, and increase the distance between piles

Pending Publication Date: 2021-08-20
杨燕伟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to set elastic pile caps through the pile body, so as to solve the uncoordinated deformation of the pile body and the soil between the piles in the treatment of the composite foundation under the existing embankment, the bearing capacity of the pile body and the soil between the piles cannot be fully exerted, and the water-permeable rigidity cannot be fully exerted. Pile needs special processing and other shortcomings, providing a composite foundation treatment method

Method used

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  • Composite foundation treatment method and application
  • Composite foundation treatment method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1: A Composite Foundation Treatment Method

[0035] refer to figure 1 , figure 2 , Figure 4 with Figure 5 , the geological condition of the site is a relatively deep layer of soft plastic to plastic silty clay 6 overlying it, underneath it is a bearing layer 7 of plastic to hard plastic silty clay, and the groundwater level is about 1 meter below the surface. Composite foundation treatment adopts PHC pipe pile 2, and the pile body penetrates the soft plastic to plastic powdery clay layer 6 and enters the plastic to hard plastic powdery clay bearing layer 7, and no vertical drainage channel is set.

[0036] Specifically include the following steps: leveling the construction site to the bottom of the reinforced concrete pile cap 12, using the static pressure method to construct the PHC pipe pile 2; constructing the elastic pile cap system 1, including: the reinforced concrete pile cap 12 is connected with the PHC through reserved steel bars or steel parts T...

Embodiment 2

[0038] Embodiment 2: A composite foundation treatment method, applied to a composite foundation with a consolidated drainage system.

[0039] refer tofigure 1 , image 3 , Figure 4 with Figure 5 , the geological condition of the site is a relatively deep layer of soft plastic to plastic silty clay 6 overlying it, underneath it is a bearing layer 7 of plastic to hard plastic silty clay, and the groundwater level is about 1 meter below the surface. Composite foundation treatment adopts PHC pipe pile 2, the pile body does not penetrate through the soft plastic ~ plastic powdery clay layer 6, the remaining part of the underlying layer 5, the vertical drainage channel 4 uses plastic drainage boards, and the drainage board penetrates through soft plastic ~ plastic powder The clay layer 6 reaches the top of the plastic-hard plastic silty clay bearing layer 7.

[0040] Specifically include the following steps: leveling the construction site to a pile top elevation of 50 cm or mor...

Embodiment 3

[0042] Example 3: A composite foundation treatment method without vertical drainage system

[0043] refer to figure 1 , figure 2 , Figure 4 with Figure 5 The geological condition of the site is that there is a relatively thick plain fill layer 6 overlying it, the bedrock 7 below it, and the groundwater is stagnant water in the upper layer and fissure water in the bedrock. The composite foundation treatment adopts bored cast-in-situ piles 2, and the pile body penetrates the plain fill layer 6 and enters the bedrock 7, and vertical drainage channels are not provided.

[0044] It specifically includes the following steps: leveling the construction site; using the rotary drilling drill to follow up the sleeve to form a hole, pouring concrete to form a pile 2, and pulling out the sleeve after the concrete pouring is completed; the construction of the pile body is completed, and after the design strength requirement is reached, the pile top is enlarged The head soil is excava...

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Abstract

The invention relates to a composite foundation treatment method and application. The composite foundation treatment method comprises an elastic pile cap system, a pile body, a load system and a preferable consolidation drainage system. The elastic pile cap system comprises reinforced concrete pile caps, expanded head geotechnical bags on the pile caps and leveling layer soil between the pile caps. The reinforced concrete pile caps are cast-in-place or prefabricated and is square; and the expanded head geotechnical bags on the pile caps are closed geotechnical bag bodies, and particle fillers are filled in the geotechnical bag bodies. The load system refers to embankment filling and gravel reinforced cushion layer filling load, and a gravel reinforced cushion layer is arranged on the top of leveling layer soil between the expanded head geotechnical bags and the pile caps. The consolidation drainage system comprises a horizontal drainage system and a vertical drainage system; the gravel cushion layer under the embankment is utilized by the horizontal drainage system; and the vertical drainage system refers to the vertical drainage channel arranged in the soil between the piles.

Description

technical field [0001] The invention belongs to the technical field of pile composite foundation under embankment (flexible foundation). Specifically, it relates to a compound foundation treatment method and application of elastic pile caps arranged on piles under embankments. Background technique [0002] Composite foundation means that part of the soil in the natural foundation is solidified and strengthened or replaced to form a vertical reinforcement (pile body). The reinforcement area is composed of two parts, the pile body and the soil between the piles, which share the load together. Under the flexible load of the embankment, the pile body and the soil between the piles distribute and jointly bear the embankment load through the embankment arch effect, forming a composite foundation. [0003] At present, in the design of the pile-net composite foundation under the embankment, rigid piles and reinforced concrete pile caps are used to deal with it. Since the stiffness ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/10
CPCE02D3/10
Inventor 杨燕伟梁军刘双美何伟陈昊李越琳
Owner 杨燕伟
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