Construction method of drainage pipe crossing seawall

A construction method and drainage pipe technology, which are applied in water conservancy projects, sewer pipeline systems, excavation, etc., can solve problems such as difficulty in ensuring the quality of steel pipes and transportation safety.

Inactive Publication Date: 2018-01-16
XINDI ENERGY ENG TECH
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Problems solved by technology

In addition, the drainage pipe passes through the existing seawall. How to ensure the safety of the seawall during the construction period is a difficult problem faced by engineers and technicians. In addi

Method used

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  • Construction method of drainage pipe crossing seawall
  • Construction method of drainage pipe crossing seawall
  • Construction method of drainage pipe crossing seawall

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Embodiment Construction

[0058] The present invention will be further described below in conjunction with the accompanying drawings.

[0059] The invention provides a method for constructing a drainage pipe crossing a seawall, the method comprising the following steps:

[0060] (A) Build cut-off walls and cofferdams inside the seawall, and excavate trenches.

[0061] The part of the trench without pile foundation is excavated by the back method of the excavator, and the slope ratio is 1:1.5-2.5, preferably 1:2 (such as figure 1 As shown), the pile foundation part of the trench is excavated by a grab dredger, the excavation depth is -3.0 to -4.5 meters, preferably about -3.5 meters, and the slope is 1:3-5, preferably 1:4 (such as figure 2 shown).

[0062] (B) A steel pipe pile 9 is driven into the front end of the drainage pipe, and a steel beam 8 for placing the drainage pipe is arranged on the upper part of the steel pipe pile 9 .

[0063]Preferably, steel pipe pile foundations are used at the fr...

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Abstract

The invention relates to a construction method of a drainage pipe crossing a seawall. The method comprises the following steps that firstly, a diaphragm wall and a cofferdam are built on the inner side of the seawall, and a trench is excavated; secondly, a steel pipe pile is driven into the front part of the drainage pipe, and a steel cross beam used for containing the drainage pipe is arranged onthe upper portion of the steel pipe pile; thirdly, a steel tube is welded, prevented from corrosion and protected by a sacrificial anode, then the steel tube is placed on the steel cross beam on theupper portion of the steel pipe pile, and after the steel tube is placed in place, and a concrete-coated pipe or a concrete-coated base (C35 underwater concrete-coated pipe) is poured on the portion,outside a pile foundation, of a pipeline; fourthly, after pouring of the concrete-coated pipe, the trench is backfilled. Pond slag is preferably used for trench backfilling which is conducted layer bylayer, and the pond slag is compacted layer by layer.

Description

technical field [0001] The invention relates to a construction method of a drainage pipe crossing a seawall. Background technique [0002] The drainage pipes crossing the seawall are deeply buried, basically below the normal water level of 3 meters, and all of them need to be constructed above and below the water. No matter the excavation of trenches or the pouring of concrete, it is very difficult. In addition, the drainage pipe passes through the existing seawall. How to ensure the safety of the seawall during the construction period is a difficult problem faced by engineers and technicians. In addition, the length of the drainage pipe (steel pipe) can reach about 80 meters at one time, so it is difficult to guarantee the safety of the steel pipe in the factory Quality of production and safe shipping. Contents of the invention [0003] The purpose of the present invention is to solve above-mentioned prior art problem, provide a kind of drainage pipe construction method ...

Claims

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Application Information

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IPC IPC(8): E02D29/077E02D31/06E02D17/20E03F3/06
Inventor 李晋袁书晓张伟武学礼
Owner XINDI ENERGY ENG TECH
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