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A Settlement Reinforcement Jacking Leveling Method Applicable to Independent Pile Foundations of Industrial Plants

A technology of industrial workshops and independent piles, which is applied in the field of pile foundation reinforcement, can solve the problems of reduced bearing capacity of the foundation, large slope of the rock surface, insufficient bearing capacity of the foundation, etc., and achieve the goal of improving bearing capacity, strong cementing ability and high stability Effect

Active Publication Date: 2021-03-23
BEIJING HENGXIANG HONGYE FOUND REINFORCEMENT TECH CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the foundation treatment is not dense, the foundation soil layer has a large compressibility, and the foundation bearing capacity is insufficient; or with the change of groundwater discharge conditions, the groundwater erosion phenomenon is formed, resulting in a decrease in the foundation bearing capacity; or due to the existence of pile ends and bedrock Weak interlayer; or the slope of the rock surface is large, and the depth of the pile tip into the rock is not enough to cause side slip; or the soil layer around the pile is loose and the soft friction coefficient is low, which leads to uneven settlement of the pile foundation

Method used

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  • A Settlement Reinforcement Jacking Leveling Method Applicable to Independent Pile Foundations of Industrial Plants

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Embodiment 1

[0011] A settlement reinforcement jacking and leveling method suitable for independent pile foundations of industrial plants, such as figure 1 As shown in the figure, the weak soil layer around the pile is first reinforced by compaction and grouting. The reinforcement depth is from shallow to deep, and the layers are downward. The grouting pressure is from small to large. The length of each grouting section is 0.5-1.0m. After the first grouting section, continue drilling for 0.5-1.0m, carry out the grouting of the second grouting section, and go down section by section until the compaction grouting is completed. The scheme can avoid secondary settlement caused by the weakening of the soil layer when the soil layer encounters water during the drilling process. The compaction and grouting reinforcement of the soft soil layer around the pile can improve the compactness and friction coefficient of the soft soil layer around the pile. The layer is reinforced, and a concave-shaped ...

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Abstract

The invention discloses a settling, reinforcing, jacking and leveling technology suitable for an independent pile foundation of an industrial plant. The technology comprises the steps that a soft soillayer around a pile is subjected to compaction grouting for reinforcement at first, specifically, the reinforcing depth is gradually increased in layered and downward modes, the grouting pressure isgradually increased, each grouting section is 0.5-1.0 m long, drilling continues for 0.5-1.0 m after the first grouting section is grouted, then the second grouting section is grouted, and operation is carried out downwards section by section until compaction grouting is completed; and drilling continues downwards 12-24 h after the soft soil layer around the pile is reinforced, upward counterforceis formed in a high-pressure grouting mode, and a pile foundation is slowly jacked to the design allowable deviation range. The independent pile foundation is reinforced in a wrapped state by adoption of a reinforcing and jacking method, good integrality and high stability are achieved, the integral foundation bearing capacity is improved, and meanwhile the jacking and leveling purposes can be achieved; and by adoption of the drilling and injection integrated advancing grouting process, the situation that the soil layer settles for the second time due to water-weakening impact of the soil layer in the drilling process can be avoided, the slurry initial setting time is short, the diffusion radius is controllable, the cementing capacity is high, the strength is high, and environment friendliness and no pollution are achieved.

Description

technical field [0001] The invention relates to the technical field of pile foundation reinforcement, in particular to an independent pile foundation settlement reinforcement jacking and leveling method suitable for existing buildings without a cap. Background technique [0002] Before construction, the backfill soil layer or weak foundation with a large depth should be treated. Under the condition of no natural foundation, most buildings need to be piled as the foundation, and then the upper building structure will be constructed. Because the foundation treatment is not compact, the foundation soil layer has greater compressibility, and the bearing capacity of the foundation is insufficient; or with the change of groundwater discharge conditions, the phenomenon of groundwater erosion occurs, resulting in a decrease in the bearing capacity of the foundation; or due to the existence of pile ends and bedrock Weak interlayer; or the inclination of the rock surface is large, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D35/00E02D3/12
CPCE02D3/123E02D35/005
Inventor 吴继光崔腾跃崔学栋
Owner BEIJING HENGXIANG HONGYE FOUND REINFORCEMENT TECH CO LTD
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