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Effective grooving construction method for underground continuous wall in slightly-weathered limestone with overlying sandy soil

A technology for underground diaphragm wall and groove-forming construction, applied in excavation, artificial islands, sheet pile walls, etc., can solve the problems of unsafe construction progress, slowness, poor groove-forming quality, etc., and achieve good hammering effect and groove-forming quality. High and fast slotting speed

Active Publication Date: 2013-12-11
CHINA RAILWAY 16 BUREAU GRP BEIJING METRO ENG CONSTR +1
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Problems solved by technology

[0005] Aiming at the defects in the prior art, the object of the present invention is to provide an effective groove-forming construction method for underground diaphragm walls in slightly weathered limestone overlying sandy soil, which overcomes the unsafe and unstable factors existing in the above-mentioned technical background And the shortcomings and deficiencies such as slow construction progress and poor trough forming quality, realize effective low cost and high precision trough forming construction in slightly weathered rock

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  • Effective grooving construction method for underground continuous wall in slightly-weathered limestone with overlying sandy soil
  • Effective grooving construction method for underground continuous wall in slightly-weathered limestone with overlying sandy soil
  • Effective grooving construction method for underground continuous wall in slightly-weathered limestone with overlying sandy soil

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Embodiment Construction

[0037] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0038] This embodiment describes an effective trenching construction method for an underground diaphragm wall in slightly weathered limestone overlying sandy soil, which is used in a site where a subway station is planned to be built. The total length of the outsourcing of the station is 260m, and the soil layer type in the area is overlying For the micro-weathered limestone layer in sandy soil, it is planned to use the hollow silicon steel alloy tooth weight hammer to punch the rock along the guid...

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Abstract

The invention provides an effective grooving construction method for an underground continuous wall in slightly-weathered limestone with overlying sandy soil. The method specifically comprises the steps of 1) performing core drilling in a grooving area to determine rock characters; 2) measuring the position of a setting-out calibration guide wall; 3) performing guide wall construction and determining the distribution of hole punching positions; 4) drilling guide holes, and installing guide rods; 5) punching a rock layer by using a heavy hammer and grabbing crushed rocks by using a grooving machine; 6) brushing a wall by using a square hammer and connecting the holes to form a groove; 7) cleaning the bottom of the groove to finish the grooving construction. The construction method provided by the invention has the advantages that the defects and the shortages of unsafe and unstable factors, slow construction progress, poor grooving quality and the like are overcome, and the effective, low-cost and high-accuracy grooving construction in the slightly-weathered limestone is realized; the construction effect is good, the grooving speed is fast, the construction process is simple and convenient and the construction period is greatly shortened.

Description

technical field [0001] The invention relates to a construction technology in the fields of construction, water conservancy, transportation, environment and other underground engineering, in particular to an effective groove-forming construction method for an underground diaphragm wall in slightly weathered limestone covered with sandy soil. Background technique [0002] In recent years, with the continuous deepening of urban construction in our country, the construction of underground railways has been launched in major cities. Due to the different geographical environment and stratum distribution of each city, it is necessary to build underground diaphragm walls under various geological conditions. The construction technology of underground diaphragm wall has been comprehensively developed and widely used in soft soil strata such as sandy soil, cohesive soil and flush fill soil in my country. However, there are still many technical difficulties and deficiencies in building...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/18E02D17/02E02D29/02E02F5/02E02F5/14
Inventor 郭银波朱小藻高宪民李辉沈水龙许烨霜吴双武范志高周洪东李晓亮刘锐苏周勃孙国辉刘启政顾长明吴玮
Owner CHINA RAILWAY 16 BUREAU GRP BEIJING METRO ENG CONSTR
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