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Systematic grouting process for dynamic water foundation pit cofferdam

A systematic, cofferdam technology, applied in infrastructure engineering, construction, etc., can solve the problems of difficult application, long construction time, high equipment and process requirements

Pending Publication Date: 2022-03-25
福建省天硕建设发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The existing cofferdams often use soil cofferdams, straw bag cofferdams, steel sheet pile cofferdams, double-wall steel cofferdams, and underground diaphragm wall cofferdams; while the grouting process can help the cofferdams to be reinforced, the success of the cofferdams The key lies in the grouting process; there are still many problems in the existing grouting process: 1) repeated drilling and grouting is required, which makes the construction efficiency lower and the construction time longer; 2) the requirements for equipment and technology are high, Difficult to apply in complex geological conditions and construction environment

Method used

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  • Systematic grouting process for dynamic water foundation pit cofferdam
  • Systematic grouting process for dynamic water foundation pit cofferdam

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Embodiment

[0045] A systemic grouting process for cofferdams of dynamic water foundation pits; the process includes the following steps:

[0046] Step 100: drilling equipment positioning; the step 100 specifically includes the following steps:

[0047] Step 110: arrangement of grouting holes;

[0048] Step 120: Drilling the grouting hole according to the preset grouting depth;

[0049] Step 130: Reinforce and protect the grouting hole after completion.

[0050] The hole position deviation of the grouting hole in the step 110 shall not be greater than 10cm; the aperture of the grouting hole is Φ164mm-168mm; the step 130 uses a geotextile to block the nozzle, and the purpose of the step 130 is to use the exposed grouting pipe Geotextiles or woven bags will seal the mouth of the pipe tightly to prevent gravel and soil from entering the grouting pipe and affecting the grouting quality.

[0051] It needs to be further explained that the layout of all drilling holes shall be measured and se...

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Abstract

The invention discloses a systematic grouting process for a dynamic water foundation pit cofferdam, and belongs to the technical field of coating detection. The method comprises the following steps that drilling equipment is positioned; grouting holes are divided into rows, sequences and sections; drilling and grouting according to rows, sequences and sections; grouting is finished; according to the method, the process of repeated drilling, grouting and hole sweeping is avoided, drilling and grouting can be conducted in parallel, the construction efficiency is greatly improved, the construction time is saved, and the method is suitable for cofferdam grouting and emergency rescue construction; in addition, the sealing effect of a pouring orifice is improved, grouting and sealing are performed section by section from top to bottom, the sealing and pressure-bearing capacity of the orifice is greatly improved, a foundation is laid for improving the pouring pressure, and the filling effect is finally achieved. And meanwhile, a controllable plastic cement plastomer grouting process is adopted, the paste slurry forming process is improved, the viscosity of the poured slurry in the initial stage is low and similar to that of pure cement slurry, and therefore in the injection process, the requirements for equipment and the process are greatly lowered, and the application range is wider.

Description

technical field [0001] The invention belongs to the technical field of coating detection, and in particular relates to a systematic grouting process for cofferdams of dynamic water foundation pits. Background technique [0002] Cofferdam refers to the temporary enclosure structure built for the construction of permanent water conservancy facilities in the construction of water conservancy projects. Its function is to prevent water and soil from entering the construction site of the building, so as to drain water in the cofferdam, excavate the foundation pit, and build the building. Generally, it is mainly used in hydraulic construction. Except as a part of formal buildings, cofferdams are generally removed after use. The height of the cofferdam is higher than the highest water level that may occur during the construction period. The existing cofferdams often use soil cofferdams, straw bag cofferdams, steel sheet pile cofferdams, double-wall steel cofferdams, and undergroun...

Claims

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Application Information

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IPC IPC(8): E02D15/02E02D19/04
CPCE02D15/02E02D19/04E02D2250/003E02D2300/0023
Inventor 杨财富郭宇谦
Owner 福建省天硕建设发展有限公司
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