Foundation pit engineering high-pressure jet grouting pile reinforcement construction method

A technology of high-pressure rotary jetting pile and construction method, which is applied in basic structure engineering, excavation, directional drilling, etc., can solve the problems of low foundation pit construction safety hazards and large impact on the surrounding environment, etc.

Inactive Publication Date: 2019-10-22
JIANGSU NANTONG NO 2 CONSTR ENG GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a rigid structure, the high-pressure rotary grouting pile itself has a good effect of reinforcement, water stop and anti-seepage, but it is greatly affected by the surrounding environment, and there are serious safety hazards in the construction of its low foundation pit

Method used

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  • Foundation pit engineering high-pressure jet grouting pile reinforcement construction method
  • Foundation pit engineering high-pressure jet grouting pile reinforcement construction method

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Experimental program
Comparison scheme
Effect test

Embodiment

[0041] 1. The construction sequence of the present invention is as follows:

[0042] 1. Due to the intersection construction problem between the northwest and southeast corners of the reinforcement area and the B3 large opening support beam, the surrounding curtains of this part should be constructed first.

[0043] 2. Construction sequence from outside to inside: first construct the outermost row of rotary spray curtains, then construct the second row, and then construct the third row, forming a row-by-row centripetal construction sequence. This is beneficial to allow the cement slurry of each row of the inner ring except the outermost row to stay in the reinforcement area.

[0044] 3. The construction between the rows of piles of the present invention adopts the method of continuous construction hole by hole in sequence.

[0045] 2. Construction method

[0046] Such as figure 1 Schematic diagram of the double tube process principle and figure 2 Shown in the construction...

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PUM

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Abstract

The invention discloses a foundation pit engineering high-pressure jet grouting pile reinforcement construction method. The construction method comprises the following steps of conducting surveying and positioning, arranging a drilling machine in place, conducting pipe insertion, conducting trial spraying, conducting high-pressure jet grouting and grouting; conducting waste slurry treatment, flushing materials and tools, and moving a rotary jet grouting machine to a next hole location to conduct repeated construction until construction is completed. Through the foundation pit engineering high-pressure jet grouting pile reinforcement construction method, in the establishment and implement process, the legal compliance principle should be embodied all the time with the main purpose of pollution prevention, the requirements of related parties for environmental management are met, and environmental behaviors of the project are continuously perfected in a pointed mode. The construction method conforms to the civilized construction requirements without disturbing residents, polluting the environment and causing public safety affairs. The specific construction behaviors during high-pressure jet grouting construction are implemented in strict accordance with the construction method to control environmental pollution and achieve the civilized construction target.

Description

technical field [0001] The invention belongs to the field of building construction, and in particular relates to a construction method for reinforcing high-pressure rotary grouting piles in foundation pit engineering. Background technique [0002] There are various forms of support for deep foundation pit structures. In recent years, with the development of production and the expansion of urban construction scale, there have been more and more deep foundation projects, and the construction conditions have become more and more restricted. The underground foundation pits are getting deeper and deeper, and the use of deep foundation pit support structures is becoming more and more mature. As a rigid structure, the high-pressure rotary grouting pile itself has a good effect of reinforcement, water-stop and anti-seepage, but it is greatly affected by the surrounding environment, and there are serious safety hazards in the construction of its low foundation pit. Contents of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/04E02D19/18E02D15/04E21B7/04
CPCE02D15/04E02D17/04E02D19/18E02D2250/0023E21B7/04
Inventor 杜平杜兴卢立新潘晶晶蔡坤恒
Owner JIANGSU NANTONG NO 2 CONSTR ENG GRP
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