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Method for changing applied force state of pile

A technology of stress state and power, applied in sheet pile wall, construction, infrastructure engineering, etc., can solve problems such as increased cost, high safety factor, and poor effect.

Inactive Publication Date: 2009-08-19
薛江炜
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally speaking, in the current technology, the remedial measures after foundation treatment failure are limited, the effect is not good, and the cost is high. The safety factor is too high when determining the bearing capacity of soil and piles, which increases the cost and wastes more social resources
[0003] When using a composite foundation, the current practice is usually to lay a cushion layer on the top of the pile, relying on the flow compensation of the cushion layer and the "piercing" of the pile top to solve the pile-soil interaction, but this will isolate the foundation bottom plate from the pile, As a result, the rigid piles and semi-rigid piles of the composite foundation cannot bear the upper tension.

Method used

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  • Method for changing applied force state of pile
  • Method for changing applied force state of pile
  • Method for changing applied force state of pile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment 1: see attached figure 1

[0014] The member (2) connected to the pile (1) extending out of the pile passes through the hole (4) provided in the cap (foundation bottom plate) (3), and extends to the top of the cap (foundation bottom plate) (3), Thereby, a space for operation is provided for tensioning or compressing the member (2) protruding from the pile. The member (2) protruding from the pile is fixed through the hole, or fixed after a set tension or compression operation procedure, and the load is transferred to the pile (1) through the member (2) protruding from the pile, so that the load The transmission path of the pile (1) and the stress state of the pile (1) change. The supporting anchor point (8) of the equipment used for tension or compression is not set directly above the pile (1), and the pile (1) can bear The load of the pile is shared to the surrounding area, or the load of the surrounding area is concentrated on the pile (1), thereby affec...

Embodiment 2

[0015] Embodiment 2: see attached figure 2

[0016] Set hoops (10) in the upper and lower set height ranges on the side of the pile head, or set auxiliary piles (10) around the pile (1), place shock absorbing devices, displacement The adjustment device is filled with gravel, sand, fly ash, rubber, foam plastic and other materials of different materials and their combinations or reserved clearance according to the needs. The hoop (10) and the pile (1) are one pile (1) and one hoop One in four forms such as (10), many piles (1) one hoop (10), one pile (1) many hoops (10), many piles (1) and many hoops (10). The effect of the hoop is many, and in the method of the present invention, use the hoop mainly because the hoop can share the load of the pile. The distance of groundwater seepage is increased, and the pressure of water stop and seepage prevention caused by opening holes on the cap (foundation floor) is reduced. In addition, the position of hoops or auxiliary piles is als...

Embodiment 3

[0017] Embodiment 3: see attached image 3 , attached Figure 4

[0018] A hole (4) is set in the hoop or auxiliary pile (10) so that the member (2) protruding out of the pile passes through, or the member (2) protruding out of the pile nearly horizontally is directly connected to the hoop or auxiliary pile (10) ) to fix. The member (2) protruding out of the pile is directly fixed on the hoop or the auxiliary pile (10) close to the horizontal, and is directly fixed on the cap (foundation floor) close to the vertical, and the effect is very different. In the absence of holes (4), if the cross-section and strength of the components protruding from the pile are relatively large, and they are directly fixed on the cap (foundation floor) close to vertical, then it should be regarded as the pile top itself. Or shock-absorbing device, displacement adjustment device; if the components protruding from the pile are slender steel bars and steel strands, and are directly fixed on the c...

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Abstract

The invention discloses a method for changing the strained condition of a pile, wherein, a part connected with the pile and extending thereout is arranged at the outer flank of a pile shaft, a perforative hole is arranged in a cushion cap (foundation mat), the part extending out of the pile passes through the hole for fixing, or is fixed after set stretching-drawing or compressing operational procedure; load is passed to the pile through the part extending out of the pile so as to change the load passing route and the strained condition of the pile, therefore, the method can achieve the purpose of adjusting sedimentation by affecting the settlement in peripheral region of the pile, and can enable the pile without direct contact with the pile bolck and the cushion cap (foundation mat) to bear pulling force.

Description

Technical field [0001] The invention belongs to a method for foundation treatment in the field of construction engineering, in particular to a method for changing the stress state of piles. Background technique [0002] Pile is a common method of foundation treatment. The normal construction sequence is to drive piles first, and then build caps. The large caps that are connected together are usually called foundation slabs, and then the upper structures such as columns, walls, and beams are constructed until the upper structures are completed and put into normal use. The piles are buried in the ground and can only bear the upper load passively. Compared with the upper structure, it is more difficult to rework and reinforce. For the foundation, if uneven settlement occurs, the remedial measures include weakening the local foundation. For example, excavate the soil on the side where the settlement is small to promote its settlement. Generally speaking, in the current technol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D27/12E02D5/22
Inventor 薛江炜薛江炤薛艺琳
Owner 薛江炜
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