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Method for sinking and positioning large-diameter steel pile casing in sea

A steel casing, large diameter technology, applied in the erection/assembly of bridges, sheet pile walls, bridges, etc., can solve the problem of inaccurate positioning affecting construction quality, etc., and achieve the effect of large popularization and application value, simple method and convenient operation.

Inactive Publication Date: 2015-08-26
CHINA RAILWAY CONSTR BRIDGE ENG BUREAU GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In view of this, the present invention aims to propose a method for positioning large-diameter steel casings in the sea, so as to solve the problem that the construction quality is affected by inaccurate positioning when steel casings are laid in harsh construction environments

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  • Method for sinking and positioning large-diameter steel pile casing in sea
  • Method for sinking and positioning large-diameter steel pile casing in sea

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Embodiment Construction

[0022] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0023] The invention will be described in detail below with reference to the accompanying drawings and examples.

[0024] Such as figure 1 , figure 2 As shown, a method for sinking and positioning large-diameter steel casings in the sea, this method is suitable for the construction of cross-sea bridges, including the following steps:

[0025] A. Build a drilling platform, insert and drive several steel pipe piles around the construction area where the pier pile foundation of the cross-sea bridge needs to be inserted on the seabed rock surface, and set steel and steel plates on the top of the steel pipe piles to form a drilling platform;

[0026] B. On the seabed rock surface, make cofferdam 1 in the construction area of ​​pier pile foundation of each sea-crossing bridge. The number of cofferdams 1 is the ...

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Abstract

The invention provides a method for sinking and positioning a large-diameter steel pile casing in sea. The method comprises the steps of A, constructing a boring platform, B, forming a cofferdam in a region in which the steel pile casing needs to be sunk, C, clearing seabed surface within the cofferdam, D, mounting a guide frame on the constructed boring platform and determining the design plane of a pile foundation, E, sinking the steel pile casing along the guide frame, and when the bottom end of the steel pile casing is sunk to the bed surface, connecting the steel pile casing with a steel pipe pile in the boring platform, F, after all the steel pile casings needed by a pier are sunk, pouring underwater non-discrete concrete in a region, corresponding to a bearing platform, of the seabed surface so that the bottoms of the steel pile casings and the underwater non-discrete concrete can be fixedly connected with the seabed surface, thereby keeping the bottoms of the steel pile casings steady and stopping the leakage of the gap between the bottoms of the steel pile casings and the seabed surface. The method is simple in structure, convenient and fast to operate, capable of well guaranteeing that the steel pile casings are sunk as designed, and therefore, the construction quality is ensured.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering construction, and in particular relates to a method for sinking and positioning a large-diameter steel casing in the sea. Background technique [0002] At present, during the construction of cross-strait and bay bridges at home and abroad, there are unfavorable geological conditions on the seabed, such as large surface undulations, severe spherical weathering, exposed bedrock, and large inclination of deep rock surfaces. Therefore, the positioning accuracy and verticality of the steel casing pile sinking process will be greatly affected, and the bottom of the steel casing will also be curled during construction. In addition, due to the surface rock in the bare rock area The strength is high, and the steel casing can only be inserted into a shallow depth by using a piling ship. The large internal and external pressure difference caused by the tidal range and the easy breakdown of the wea...

Claims

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Application Information

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IPC IPC(8): E02D7/00E01D21/00
Inventor 李志辉袁长春张亚锋刘长辉王峰张建勋赵多苍曹宇
Owner CHINA RAILWAY CONSTR BRIDGE ENG BUREAU GRP
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