Method for correcting deviation of building in miniature pile hole earth taking manner

A technology of buildings and micro-piles, which is applied in the direction of construction and infrastructure engineering, can solve the problems of heavy excavation workload, high risk, and easy to be restricted by site conditions, and achieve easy control, cost reduction, and rectification process precise effect

Active Publication Date: 2015-12-23
SHANDONG JIANZHU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional rectification method of excavation and excavation and water irrigation requires digging a deep pit on the outside of the building, and then leveling the hole to the bottom of the foundation. This method cannot be used when there is no construction site on one side
At the same time, this method is a relatively risky job. Once the rectification measures are out of control or the reinforcement measures are improper, it is difficult to prevent it from continuing to tilt. This kind of tilting is often carried out at an accelerated rate.
However, the radiation well method needs to dig holes in the building. When the building adopts a raft foundation or when the net distance between the strip foundation and the independent foundation is small, it is also impossible to carry out rectification construction.

Method used

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  • Method for correcting deviation of building in miniature pile hole earth taking manner
  • Method for correcting deviation of building in miniature pile hole earth taking manner
  • Method for correcting deviation of building in miniature pile hole earth taking manner

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Experimental program
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Effect test

Embodiment 1

[0041] Such as figure 1 and 2 As shown, they are respectively the elevation and plan view of the building before the rectification. For this building, the method of rectifying the rectification of the building by taking soil from the micro-pile pile holes includes the following steps:

[0042] (1) Above the building foundation 3 on the larger side of the settlement, set up a drilling machine to drill the micro-pile pile holes 7; The hard soil layer 6 below; in order to prevent the hole from collapsing, the method of protecting the wall of the steel casing is adopted.

[0043] (2) if Figure 3-6 As shown, hang the reinforcement cage or steel pipe in the drilled hole and pour the cement mortar with the strength of M30 (M30 cement mortar-the mass ratio of water and cement is 0.5~0.6:1, the mass ratio of cement and sand is 1:0.3 ), and at the same time pull out the retaining wall steel casing; after the cement mortar pouring in the entire pile body is completed, the strength of...

Embodiment 2

[0050] Such as Figure 13 As shown, a frame structure residential building with 6 floors above ground and 1 floor below ground in Yantai has a highly compressible soil layer (from top to bottom: silty clay, silt, muddy silty clay, gravel sand) Mixed breccia and fully weathered mica schist), it dipped southward shortly after its completion, and the inclination rate exceeded the 0.4% standard allowed by the national code. In order to implement building tilt correction, the following steps are taken:

[0051] (1) Set up a drilling machine above the raft foundation on the larger settlement side (the southernmost side), and drill a row of miniature pile pile holes; the pile holes pass through silty clay, silt, silty silty clay, up to the underlying gravel-sand-mixed breccia; drill site see Figure 14 , the diameter of the pile hole is 220mm, the pile length is 15m, and the pile end enters the gravel-sand mixed breccia layer for 2.0m. In order to prevent the hole from collapsing,...

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Abstract

The invention discloses a method for correcting the deviation of a building in a miniature pile hole earth taking manner. The method includes the following steps that firstly, a miniature pile hole is drilled in the upper portion of the seriously-settled side of a building foundation; secondly, a steel reinforcement cage or a steel pipe is suspended in the drilled hole and the hole is filled with cement mortar; thirdly, a miniature pile hole is drilled in the upper portion of the slightly-settled side of the building foundation and meanwhile the wall is protected through a steel casing pipe; when a soft soil layer is drilled, the steel casing pipe enters the top of the soft soil layer to take soil, and therefore surrounding soft soil collapses towards the drilled hole; fourthly, in the soil taking forced settlement process of the third step, the settlement change of the whole building is observed, and when the forced settlement side of the foundation is settled to the elevation close to that of the sealed portion of the foundation, the hole is continuously drilled to a hard soil layer; and fifthly, a steel reinforcement cage or a steel pipe is suspended in the drilled hole, the hole is filled with cement mortar and then sealed, and the forced settlement process of the side is stopped. The characteristic that continuous settlement can be stopped by sealing the upper end of a miniature pile is used for guaranteeing that the deviation correcting process is accurate and easy to control.

Description

technical field [0001] The invention belongs to the field of civil engineering, and in particular relates to a method for rectifying the inclination of buildings with soil taken from micro-pile pile holes. Background technique [0002] Building rectification refers to the uneven settlement of the foundation caused by the foundation, the foundation or the building itself, and its superstructure deviates from the vertical position and tilts. When a building tilts beyond the requirements of the relevant national codes and seriously affects the normal function of use, it is a measure of rectification, rectification, reinforcement and stability taken in order to restore its normal function. [0003] The working principle of building rectification is to change the stress state of the foundation soil, that is, to use the principle of stress release or stress transfer to make the side of the building with less settlement passively forced to land; at the same time, perform foundation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D35/00
Inventor 孙剑平张鑫高翔邵广彪郭道通贾强
Owner SHANDONG JIANZHU UNIV
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