Construction method of continuous wall trench underground on soft soil region

A technology for underground diaphragm walls and construction methods, which is applied in sheet pile walls, foundation structure engineering, construction, etc., and can solve the difficulty of crossing through trenches in underground diaphragm walls, the slow speed of trenching in underground diaphragm walls, and the verticality of trenches in underground diaphragm walls Problems such as poor control can be achieved to ensure the formation of grooves, improve the verticality of grooves, and speed up the construction speed

Inactive Publication Date: 2008-10-22
NO 2 CONSTR GRP CO LTD OF SHANGHAI CONSTR GRP
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Problems solved by technology

However, there are various defects in the above-mentioned methods: 1. It is very difficult to pass through the seventh layer of soil in Shanghai (commonly known as "iron plate sand layer") in trough formation of the underground diaphragm wall; 2. The verticality control of the trough formation in the underground diaphragm wall is relatively poor; 3. Continuous wall grooves are slow

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  • Construction method of continuous wall trench underground on soft soil region

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Embodiment approach

[0045] A construction method for trenching an underground diaphragm wall in a soft soil area, comprising the following steps:

[0046] Step 1, guide wall construction;

[0047] This project adopts an inverted "L" type guide wall, the top elevation of the guide wall is 2.800m, the depth of the guide wall is 1.8m; the distance between the guide walls is 1240mm, the concrete is commercial concrete, and the strength grade is C20;

[0048] Step 1.1, engineering measurement;

[0049] The axis of the guide wall must be reviewed and authenticated by the supervisor before excavation;

[0050] Step 1.2, digging and clearing obstacles;

[0051] Step 1.3, fabrication and installation of guide wall reinforcement;

[0052] After the excavation of the guide wall trench is completed, immediately introduce the center line under the trench to control the construction of the bottom form and formwork to ensure that the center line of the guide wall is correct;

[0053] Step 1.4, guide wall fo...

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Abstract

The invention discloses a construction method for underground continuous wall trench formation in soft soil areas. The trench formation by a bucket trenching machine is adopted to an upper soft soil layer, the milling trench formation by a hydraulic trench cutter is adopted when the construction enters a stiff soil layer, finished trench walls are restored during the trenching of the hydraulic trench cutter to ensure that the verticality of an upper trench hole also achieves the design requirement, thereby assuring the trench formation of the stiff soil layer in soft soil areas, accelerating the construction speed of underground continuous walls, and improving the trench-forming verticality of the underground continuous walls at the same time.

Description

technical field [0001] The invention relates to a construction method for forming grooves in underground continuous walls in soft soil areas. Background technique [0002] At present, the construction methods of underground diaphragm wall grooves in soft soil areas such as Shanghai generally adopt groove forming machines, "two drills and one grasp" and so on. However, there are various defects in the above-mentioned methods: 1. It is very difficult to pass through the seventh layer of soil in Shanghai (commonly known as "iron plate sand layer") in trough formation of the underground diaphragm wall; 2. The verticality control of the trough formation in the underground diaphragm wall is relatively poor; 3. The groove speed of the continuous wall is slow. Contents of the invention [0003] The invention provides a construction method for trenching an underground diaphragm wall in a soft soil area, which can solve construction technical problems such as ultra-deep, high verti...

Claims

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Application Information

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IPC IPC(8): E02D5/18
Inventor 姜向红吴献邓文龙闵卫国
Owner NO 2 CONSTR GRP CO LTD OF SHANGHAI CONSTR GRP
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