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Method for constructing riverbed cofferdam through large-particle-size pebble layer

A pebble layer and large particle size technology, which is applied in infrastructure engineering, construction, etc., can solve the problems of lack of empirical data, scheme feasibility, and unpredictable construction efficiency, etc., to improve the construction process, high strength, and excellent stability Effect

Inactive Publication Date: 2019-06-28
ZHEJIANG XINGTU BRIDGE TEMPORARY STEEL STRUCTURE ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the lack of empirical data on the application of this construction method under the geological conditions, the feasibility and construction efficiency of the scheme cannot be estimated, which has many adverse effects on the construction quality and progress.

Method used

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  • Method for constructing riverbed cofferdam through large-particle-size pebble layer
  • Method for constructing riverbed cofferdam through large-particle-size pebble layer
  • Method for constructing riverbed cofferdam through large-particle-size pebble layer

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings and examples.

[0020] Such as Figure 1 to Figure 4 Shown, the method for cofferdam construction in the river bed A of large particle size pebble layer comprises the following steps,

[0021] D. Drill the steel casing 1, use the drilling rig to punch holes in the riverbed A in the steel casing 1, and fill the steel casing 1 with sandbags 2 to the riverbed A after punching.

[0022] E. Pull out the steel casing 1.

[0023] F. Setting positioning piles 3 on the riverbed A filled with sandbags 2; the positioning piles 3 are distributed in a ring. The outer diameter of the steel casing 1 is larger than that of the positioning pile 3 . In this embodiment, the large-diameter steel casing 1 is first used to impact the riverbed A of the large-diameter pebble layer. The large-diameter pebbles are crushed by the impact and washed away with the water flow, and then the steel cas...

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Abstract

A method for constructing a riverbed cofferdam through a large-particle-size pebble layer includes the following steps of piling a steel casing, drilling holes in a riverbed in the steel casing through a drilling machine, filling the steel casing with a sand bag to the riverbed after hole drilling, pulling out the steel casing, and annularly piling a positioning pile on the riverbed filled with the sand bag, wherein the outer diameter of the steel casing is larger than the outer diameter of the positioning pile.

Description

technical field [0001] The invention relates to a cofferdam construction method on a river bed of a large-diameter pebble layer, and belongs to the technical field of building construction. Background technique [0002] The riverbed of large-sized pebble layer is a typical mechanically unstable stratum, which has great adverse effects on construction operations. The riverbed is geologically characterized by large-sized pebble layer, and steel sheet piles and locking piles cannot be driven to the design depth. The method of punching and filling piles is used for construction. Due to the lack of empirical data on the application of this construction method under the geological conditions, the feasibility and construction efficiency of the scheme cannot be estimated, which has many adverse effects on the construction quality and progress. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a rea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D19/04
Inventor 陈涛赵卓姚建峰毛冬浩
Owner ZHEJIANG XINGTU BRIDGE TEMPORARY STEEL STRUCTURE ENG