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A reinforcement and lifting method for bar-shaped or box-shaped foundation buildings

A box-shaped foundation and strip-shaped foundation technology, which is applied in construction, foundation structure engineering, soil protection, etc., to achieve good overall stability, avoid secondary settlement, and ensure structural stability

Active Publication Date: 2022-02-18
BEIJING HENGXIANG HONGYE FOUND REINFORCEMENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a method for strengthening and lifting a bar-shaped or box-shaped foundation building, which solves the problem of settlement, lifting and reinforcement of a strip-shaped or box-shaped foundation building, and has good overall stability, little damage to the building and Advantages of preventing re-sedimentation

Method used

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  • A reinforcement and lifting method for bar-shaped or box-shaped foundation buildings
  • A reinforcement and lifting method for bar-shaped or box-shaped foundation buildings
  • A reinforcement and lifting method for bar-shaped or box-shaped foundation buildings

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Embodiment 1

[0061] The invention discloses a method for strengthening and lifting a strip-shaped or box-shaped foundation building. This embodiment takes a strip-shaped foundation 1 building as an example for illustration. Such as figure 1 As shown, a building with a strip foundation 1 includes intersecting strip foundations 1 , and structural columns 94 are arranged at intervals on the strip foundation 1 , and walls are arranged between the structural columns 94 . The reinforcement lifting method includes the following steps:

[0062] S1. Layout of measuring points: a plurality of measuring points are evenly arranged around the outer contour of the building, which can be arranged on the strip foundation 1, preferably at the position of the structural column 94; use a level to measure the elevation of each measuring point, according to the measured The elevation of the points determines that the side of the four corners of the building where the two points with the largest settlement are...

Embodiment 2

[0086] When the foundation of the building is a special stratum such as collapsible loess and miscellaneous fill, the drilling and grouting operations shall adopt the integral forward grouting process instead of the integral backward grouting. Because the overall retreat grouting construction needs to drill the drill pipe to the design depth at one time, during the process of drilling to the design depth, the water sprayed from the drill bit will soften the surrounding soil, resulting in secondary settlement of the building. When drilling in collapsible loess, although the drilling speed is fast and there is not much water out of the drill bit, the plan of drilling to the design depth at one time cannot be adopted because the collapsible loess will subside when it meets water. When drilling in miscellaneous fill soil layers, backfilled flakes are often encountered. When drilling into flakes, the drilling speed slows down and more water is released from the drill bit, which will...

Embodiment 3

[0100] This embodiment mainly introduces the reinforcement and lifting of the box-shaped foundation building. The difference from Embodiments 1 and 2 is that all the above strip foundations 1 are equivalent to the partition wall 10 in the box foundation, and the above-mentioned outer wall is equivalent to the partition wall 10 located on the outermost periphery in the box foundation, and the reinforcement injection The grout hole 31, the lifting hole 4 and the pile foundation hole 7 all need to penetrate the bottom plate 101 of the box foundation.

[0101] When raising buildings with box foundations, it is preferred, as in Figure 17 As shown in , each corner of the building on the lifting side is correspondingly arranged with two lifting holes 4, and the two lifting holes 4 are respectively located on the outside of the two mutually perpendicular outer contour lines of the strip foundation 1; Directly below exterior wall 2.

[0102] After the lifting step of S4, and between...

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Abstract

The invention relates to a reinforcement and lifting method for a bar-shaped or box-shaped foundation building, which includes the following steps: determining the lifting side of the building according to the elevation of the measuring point; A plurality of slanted downward reinforcement grouting holes, using pressure grouting in the reinforcement grouting holes to form a reinforcement under the strip foundation or the partition wall; at the two ends close to the lifting side of the building, the slanting downward lifting holes are arranged; The lifting hole goes deep into the bottom of the reinforcement, and the pressure grouting is performed in the lifting hole at the same time. Using the reinforcement as a buffer zone, the lifting side of the building is lifted, and the lifting speed is controlled so that the elevation of the two corners is finally raised to a level that is different from the building. The raised side corresponds to the same elevation as the corner, and then a reinforced pile foundation is formed under the reinforced body, which supports the strip foundation together with the reinforced body. The invention has the advantages of good overall stability, controllable lifting speed and height, little damage to buildings and prevention of subsidence again.

Description

technical field [0001] The invention relates to the technical field of building foundation uplift and reinforcement, in particular to a method for reinforcement and uplift of a bar-shaped or box-shaped foundation building. Background technique [0002] Due to reasons such as architectural survey, design, construction or bad weather, the completed building will sink due to insufficient foundation strength. If the inclination value of the building exceeds the allowable inclination value, it will affect the normal use, even crack and damage, posing a threat to the structural safety of the building. At this time, it is necessary to carry out lifting correction and foundation reinforcement. The existing lifting correction method generally adopts polyurethane grouting for lifting. The polyurethane grouting method is to inject polyurethane foam reaction raw materials into the foundation, and to fill, infiltrate, compact, replace and reinforce the reinforced soil through the huge e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D35/00E02D3/12
CPCE02D35/005E02D3/12
Inventor 崔学栋吴继光崔腾跃
Owner BEIJING HENGXIANG HONGYE FOUND REINFORCEMENT TECH CO LTD
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