Construction method of underground diaphragm wall

An underground diaphragm wall and construction method technology, applied in artificial islands, sheet pile walls, water conservancy projects, etc., can solve problems such as enlarged joints, safety risks of foundation pits, hidden dangers of durability, etc., to prevent water seepage and improve anti-seepage. Ability, the effect of prolonging the curing time

Inactive Publication Date: 2012-07-04
中煤江南建设发展集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the successive pouring of joint concrete will form a natural gap with mud skin at the joint of the wall, and there will be splits between the two walls due to the difference in verticality, and the differential deformation of the wall under the water and soil pressure will make the joint The joints will be further enlarged, and the current continuous wall joint measures have not effectively solved the above problems
After the underground dia

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0015] Example 1

[0016] The construction method of an underground continuous wall of the present invention includes the following steps: (1) excavating a 6m long, 0.6m wide, and 20m deep trench at a predetermined position, placing a steel cage, and pouring the initial setting and final setting Long-term concrete forms an underground connecting wall section; (2) Excavate trenches adjacent to the already formed underground connecting wall section, place steel cages, pour ordinary concrete to form an underground connecting wall section, and two adjacent sections Reserve a space of 0.5 meters between the wall sections of the underground connecting wall to ensure that the joints can be effectively overlapped; (3) After the two sections of underground continuous wall are poured, when the concrete has not yet reached the setting, use a diameter of 0.8 at the joint of the two walls. The hole is made by the rotary pile digging machine with a sleeve, and concrete is poured into the hole,...

Example Embodiment

[0017] Example 2

[0018] The construction method of an underground continuous wall of the present invention includes the following steps: (1) excavating a trench with a length of 6m, a width of 0.8m and a depth of 25m at a predetermined position, placing a reinforcement cage, and pouring the initial setting and final setting Long-term concrete forms an underground connecting wall section; (2) Excavating trenches adjacent to the already formed underground connecting wall section, placing a steel cage, and pouring concrete with a long initial and final setting time to form the underground connecting wall Section, a space of 0.6 meters is reserved between the two adjacent underground connecting wall sections to ensure that the joints can be effectively overlapped; (3) After the two underground continuous wall sections are poured, the concrete has not yet reached the setting. The wall joints are made with a 1.0-meter diameter rotary pile machine with a sleeve. A steel cage is placed...

Example Embodiment

[0019] Example 3

[0020] An underground continuous wall construction method of the present invention includes the following steps: (1) excavating a 6m long, 1m wide, and 25m deep trench at a predetermined position, placing a steel cage, and pouring the initial setting and final setting time Longer concrete forms the underground connecting wall section; (2) Digging trenches adjacent to the already formed underground connecting wall section, placing steel cages, and pouring concrete with longer initial and final setting time to form the underground connecting wall section , Reserve a 0.8-meter gap between two adjacent underground connecting wall sections to ensure that the joints can be effectively overlapped; (3) After the two underground continuous wall sections are poured, the concrete still has not reached the setting, when the two walls At the joints of the webs, a 1.2-meter-diameter rotary pile machine with a sleeve is used to form holes, a steel cage is placed in the holes,...

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PUM

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Abstract

The invention discloses a construction method of an underground diaphragm wall, belonging to the technical field of a support structure. The technical essentials comprise the following steps of: (1) digging a groove on a pre-set foundation and placing a steel reinforcement cage; and casting concrete to form an underground diaphragm wall section; (2) digging one groove at the adjacent position of the formed underground diaphragm wall section and placing one steel reinforcement cage; and casting the concrete to form one underground diaphragm wall section; reserving a suitable distance between the two adjacent underground diaphragm wall sections so as to ensure that connectors can be effectively overlapped; and (3) after casting the two underground diaphragm wall sections, forming holes on the connectors of the two wall sections when the concrete is not condensed; pouring the concrete into the holes to better connect the two underground diaphragm wall sections, so as to form a continuous whole body. The invention aims to provide the construction method of the underground diaphragm wall, which has the advantages of simplicity in construction and good water sealing effects; and the construction method is used for constructing the underground diaphragm wall.

Description

technical field [0001] The invention relates to a construction method of a supporting structure, more specifically, to a construction method of an underground connection wall. Background technique [0002] The underground continuous wall is to perform trough-forming operation in advance to form a trough section of a certain length, hang a reinforcement cage in the trough section, pour concrete to form a unit wall section, and then connect the unit wall sections to form a continuous underground reinforced concrete wall. The underground diaphragm wall can be constructed under complex conditions, has a large construction depth, a large bearing capacity of supporting components, and good anti-seepage performance. It is the most reliable support method in foundation pit support. Especially in the sand layer, in order to achieve the water-stop effect, it is necessary to use the underground diaphragm wall, which is the most reliable support method. At present, the underground diap...

Claims

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Application Information

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IPC IPC(8): E02D5/18E02D29/16
Inventor 马文旭谭永强高培恩
Owner 中煤江南建设发展集团有限公司
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