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Horizontally reinforced grouting underpinning working well and its manufacturing method

A technology of horizontal reinforcement and production method, applied in the direction of infrastructure engineering, construction, sheet pile wall, etc., can solve the problems of shaft wall inclination, surrounding ground subsidence, affecting the surrounding environment, etc., and achieve the effect of ensuring vertical verticality

Inactive Publication Date: 2019-01-15
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of caisson construction, there are two problems that are difficult to solve: one is that the wall of the caisson is tilted during the process of excavation and masonry sinking, and it is difficult to sink the caisson smoothly; In the high strata, the groundwater level must be lowered to carry out caisson construction. Lowering the groundwater level will cause the surrounding ground to subside, thereby affecting the surrounding environment.

Method used

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  • Horizontally reinforced grouting underpinning working well and its manufacturing method
  • Horizontally reinforced grouting underpinning working well and its manufacturing method
  • Horizontally reinforced grouting underpinning working well and its manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Embodiment 1, a kind of laterally reinforced grouting underpinning working well, such as Figure 1-7 As shown, it includes ring pile 1 and bottom cover pile 2; ring pile 1 is an approximate ring column formed by annular overlapping of at least four pile bodies 11 (eighteen pile bodies 11 are used in the figure), and the pile bodies 11 are mutually The lap joint length is t1, which can effectively isolate water and resist earth pressure. The bottom cover pile 2 is arranged at the bottom of the middle through hole of the ring pile 1, the bottom surface of the bottom cover pile 2 is parallel to the bottom surface of the ring pile 1, and the bottom cover pile 2 is overlapped with each pile body 11 of the ring pile 1, and the lap length is t2, thus The bottom of the through hole in the middle of the sealed annular pile 1 can effectively isolate water and resist earth pressure. General back cover pile 2 is one, also can adopt a plurality of back cover piles 2 to overlap when...

specific example 1

[0079] A building, the design requirement is: the depth of foundation d=1.0m, the foundation soil reinforcement thickness h=3.0m that needs, the grout diffusion radius of reinforced pipe under the foundation is c=1.5m, use the present invention to make working well:

[0080] The overlapping length t1=0.2m between two adjacent pile bodies 11 is preset, the overlapping length t2=0.2m between the bottom cover pile 2 and the annular pile 1, the radius r=0.8m of the working well space 4, and the construction distance s= 0.5m.

[0081] 1. According to the reinforcement thickness h of the foundation soil, determine the number n of reinforcement pipes 3:

[0082] n=h / (2c)=3 / (2×1.5)=1;

[0083] 2. Determine the height l1 of the working well space 4:

[0084] l 1 =d+h 1 +s=1.0+1.5+0.5=3.0m;

[0085] 3. Determine the height l2 of the back cover pile 2:

[0086] A reinforced pipe 3: l 2 =1.0+(n-1)×0.5=1.0m;

[0087] Four, determine the total length l of ring pile 1:

[0088] l=l ...

specific example 2

[0097] A building, the design requirement is: the depth of foundation d=1.0m, the foundation soil reinforcement thickness h=6.0m that needs, the grout diffusion radius of reinforced pipe under the foundation is c=1.5m, use the present invention to make working well:

[0098] The overlapping length t1=0.2m between two adjacent pile bodies 11 is preset, the overlapping length t2=0.2m between the bottom cover pile 2 and the annular pile 1, the radius r=0.8m of the working well space 4, and the construction distance s= 0.5m.

[0099] 1. According to the reinforcement thickness h of the foundation soil, determine the number n of reinforcement pipes 3:

[0100] n=h / (2c)=6 / (2×1.5)=2;

[0101] 2. Determine the height l1 of the working well space 4:

[0102] l 1 =d+h 1 + h 2 +s=1.0+1.5+3.0+0.5=6.0m;

[0103] 3. Determine the height l2 of the back cover pile 2:

[0104] Two reinforced pipes 3: l 2=1.0+(n-1)×0.5=1.0+(2-1)×0.5=1.5m;

[0105] Four, determine the total length l of ...

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Abstract

The invention discloses a transverse reinforcement grouting and underpinning working well. The transverse reinforcement grouting and underpinning working well comprises an annular pile and a bottom sealing pipe; the annular pile is an approximate circular-arc column formed by annularly connecting at least four pile bodies in a lap-joint mode; the bottom sealing pile is arranged at the bottom of a middle through hole of the annular pile and connected with the pile bodies of the annular pile in a lap-joint mode; an approximately-cylindrical working well space is formed by the middle through hole of the annular pile and the bottom sealing pile; each pile body of the annular pile is provided with at least one reinforcement pipe penetrating through the pile body from top to bottom. The invention further provides a manufacturing method of the transverse reinforcement grouting and underpinning working well. Accordingly, the working well is formed through high-pressure jetting grouting and can provide a construction space and a construction operating plane for transverse reinforcement grouting and underpinning of various complex strata.

Description

technical field [0001] The invention relates to a special construction technology of civil engineering, and more specifically, relates to a horizontally reinforced grouting underpinning working well and a manufacturing method thereof. Background technique [0002] At present, the horizontally reinforced grouting underpinning working wells of the existing building foundations are made of caissons. In the process of caisson construction, there are two problems that are difficult to solve: one is that the wall of the caisson is tilted during the process of excavation and masonry sinking, and it is difficult to sink the caisson smoothly; In the high strata, the groundwater level must be lowered to carry out caisson construction, and lowering the groundwater level will cause the settlement of the surrounding ground, thereby affecting the surrounding environment. [0003] Especially when it is necessary to use transverse reinforcement grouting underpinning to strengthen the deep ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D5/46E02D3/12
CPCE02D3/12E02D5/46
Inventor 马海龙马宇飞
Owner ZHEJIANG SCI-TECH UNIV
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