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Grouting water-blocking cofferdam and construction method thereof

A grouting and water-stop technology, which is applied in the direction of foundation structure engineering, construction, sheet pile walls, etc., can solve problems such as inconvenience, cofferdams cannot be lowered smoothly, and cannot be plugged in place, so as to achieve the effect of clear structural stress

Active Publication Date: 2012-10-03
THE 2ND ENG CO LTD MBEC +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] In the existing bridge construction technology, caissons, steel cofferdams, reinforced concrete cofferdams or steel sheet pile cofferdams are generally used to deal with deep water foundation pits. However, when encountering rocky riverbeds, especially inclined rock formations or other irregular On the rock face, it will happen that the cofferdam cannot be lowered smoothly or cannot be inserted into place, so it is difficult to achieve the water-stop effect, which will bring a lot of inconvenience to the follow-up work

Method used

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  • Grouting water-blocking cofferdam and construction method thereof
  • Grouting water-blocking cofferdam and construction method thereof
  • Grouting water-blocking cofferdam and construction method thereof

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention.

[0022] Such as figure 1 with figure 2 As shown, it is an embodiment of the grouting waterstop cofferdam of the present invention, which includes a steel anchor pipe 1, which is inserted below the riverbed line 8 to form an anchoring part, and the periphery of the steel anchor pipe 1 is sheathed with a reinforcement cage 2. The gap between the steel anchor pipe 1 and the steel cage 2 is filled with flakes or clay bags 3, and the top of the steel anchor pipe 1 is provided with a steel truss 4, which connects the steel anchor pipe 1 into a whole.

[0023] A grouting hole is opened on the upper part of the anchoring part of the steel anchor pipe 1, and is anchored with the bedrock t...

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Abstract

The invention discloses a grouting water-blocking cofferdam, which comprises steel anchor pipes inserted to below a riverbed line to form an anchor portion, a steel reinforcement cage fitted over the steel anchor pipe, a rubble or clay bag filled in the gap between the steel anchor pipe and the steel reinforcement cage, and a profile steel truss arranged at the top ends of the steel anchor pipes to connect the steel anchor pipes into an integer. A grouting water-blocking cofferdam construction method includes building a construction platform, drilling, mounting the steel anchor pipes in the holes, anchoring to bedrock, and fitting the steel reinforcement cage over the steel anchor pipes to form a closed wall; connecting the steel anchor pipes into an integer; and grouting in the area surrounded by the closed wall, to form the water-blocking cofferdam. The inventive cofferdam has clear force loading of structure, is stable and dense, and provides convenient conditions for follow-up foundation pit excavation or other base constructions.

Description

technical field [0001] The invention relates to the technical field of bridge construction, in particular to a grouting water-stop cofferdam and a construction method thereof. Background technique [0002] In the existing bridge construction technology, caissons, steel cofferdams, reinforced concrete cofferdams or steel sheet pile cofferdams are generally used to deal with deep water foundation pits. However, when encountering rocky riverbeds, especially inclined rock formations or other irregular On the rock face, it will happen that the cofferdam cannot be lowered smoothly or cannot be inserted into place, so it is difficult to achieve the water-stop effect, which will bring a lot of inconvenience to the follow-up work. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a grouting water-stop cofferdam that can still achieve the water-stop effect when encountering rocky riverbeds, especially inclined rock formation...

Claims

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Application Information

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IPC IPC(8): E02D19/04E02D5/20
Inventor 龚宇飞耿增现余允锋曹春宁甘六一翁金福邱训兵唐绍华王欣陶亚成陈霜兵李奔琦
Owner THE 2ND ENG CO LTD MBEC
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