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Construction method of underground diaphragm wall comprising fore shaft pipe water stop structure

An underground diaphragm wall and construction method technology, which is applied to underwater structures, infrastructure engineering, hydraulic engineering and other directions, can solve the problems of low rigidity and weak shear resistance of the underground diaphragm wall, reduce the extubation force, The effect of increased wall depth and reduced contact area

Active Publication Date: 2018-06-12
北京市地质工程有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the lock pipe is filled with plain concrete, and the reinforcement cage of the second section of the underground diaphragm wall cannot extend to the position of the lock pipe. Therefore, there are often areas of weak shear resistance at the joints of the underground diaphragm wall, which makes the underground diaphragm wall The stiffness is not high

Method used

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  • Construction method of underground diaphragm wall comprising fore shaft pipe water stop structure
  • Construction method of underground diaphragm wall comprising fore shaft pipe water stop structure
  • Construction method of underground diaphragm wall comprising fore shaft pipe water stop structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] An assembled locking pipe, such as figure 1 As shown, including the pipe body 1, the cross section of the pipe body 1 is a regular hexagon. The pipe body 1 includes two semi-hexagonal steel pipes 10, the two semi-hexagonal steel pipes 10 are formed by dividing the centers of two sides corresponding to the pipe body 1 along the generatrix, and the two semi-hexagonal steel pipes 10 The semi-hexagonal steel pipe 10a and the semi-hexagonal steel pipe 10b are in sequence. Wherein the semi-hexagonal steel pipe 10a and the semi-hexagonal steel pipe 10b are assembled together to form the assembly surface 11 .

[0062] combine figure 2 and image 3 , The semi-hexagonal steel pipe 10a is provided with an assembly groove 12 at the center of the assembly surface 11, and the assembly groove 12 is concave inward along the radius of the semi-hexagonal steel pipe 10a. The assembling groove 12 is T-shaped, wherein the T-shaped head faces the inside of the half-hexagonal steel pipe ...

Embodiment 2

[0070] A construction method for an underground diaphragm wall using an assembled locking pipe water-stop structure, combining Figure 5 to Figure 8 , the construction method of the underground diaphragm wall is as follows:

[0071] A1: guide wall 5 construction: combined Figure 5 , use marking equipment to mark the construction range of the underground diaphragm wall 7, then use mechanical excavation of the base soil layer 4 to form a pit about 1.5 meters deep, and insert L-shaped steel bars 40 on both sides of the pit, and L-shaped steel bars 40 A baffle is set up on the outside, and concrete is poured to form a guide wall 5;

[0072] A2: Digging the first slot section 41: Combining Figure 6 and Figure 15 , after the guide wall 5 is solidified, use a hydraulic grab groover to dig deep into the base soil layer 4 below the guide wall 5 to form the first groove section 41;

[0073] A3: Construction of the first underground diaphragm wall 70:

[0074] (1) combination F...

Embodiment 3

[0098] A kind of manufacturing method of the assembled locking pipe described in the processing embodiment 1:

[0099] S1 Take a piece of steel plate 1D80, start from the starting point 800, and bend it twice in the same direction, the first time is 90 degrees, the second time is 120 degrees, refer to Figure 17 , the bent boards are respectively named as the first board 801, the second board 802 and the third board 803;

[0100] S2 Continue to bend at the first inflection point 804 away from the starting point 800 on the third plate body 803 to form the clamping groove 2 described in Embodiment 1, and the bending of the clamping groove 2 stops at the stop point 805;

[0101] S3 On the basis of S2, continue to bend the steel plate 1D800 twice along the original bending direction with the bending stop point 805 of the clamping groove 2 to form the fourth plate body 806 and the fifth plate body 807, and the third plate body The angle between 803 and the fourth plate 806 is 120 ...

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Abstract

The invention discloses a construction method of an underground diaphragm wall comprising a fore shaft pipe water stop structure. Through change of a fore shaft pipe structure used during diaphragm wall construction and adaptive change during the construction process, the technical effects of reducing force for pulling out a fore shaft pipe, reducing the volume of an unreinforced plain concrete part at the joint of an underground diaphragm wall and improving the anti-seepage performance of the joint of the underground diaphragm wall are achieved.

Description

technical field [0001] The invention relates to a building construction method, more specifically, it relates to an underground continuous wall construction method using an assembled locking pipe water-stop structure. Background technique [0002] With the vigorous development of my country's construction market, underground diaphragm walls are more and more widely used as maintenance structures in large deep foundation projects such as subways and housing construction. The underground diaphragm wall is composed of many wall sections. In order to maintain the continuous construction between the wall sections, the joint adopts the lock pipe technology, that is, before pouring the concrete of the groove section, a diameter and groove is pre-inserted at the end of the groove section. For lock pipes with the same width, pull out the lock pipe slowly after the initial setting of the concrete, so that the end forms a half-tenon shape. Then the protrusion of the reinforcement cage...

Claims

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Application Information

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IPC IPC(8): E02D5/20E02D29/16
Inventor 任贵生张艳芳王可新王小洁邹登亮沈元红
Owner 北京市地质工程有限责任公司
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