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Bored pile platform construction method on covering-free steep bare rock in deepwater and rapid stream

A technology without covering layer and construction method, applied in water conservancy projects, artificial islands, sheet pile walls, etc., can solve the problems of large workload, long construction period, high cost, etc., and achieve low cost, short construction period, and reduced work. amount of effect

Inactive Publication Date: 2013-03-20
MUNICIPAL ENVIRONMENTAL PROTECTION ENG CO LTD OF CREC SHANGHAI GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] In summary, the above schemes all have the disadvantages of heavy workload, long construction period, and high cost.

Method used

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  • Bored pile platform construction method on covering-free steep bare rock in deepwater and rapid stream
  • Bored pile platform construction method on covering-free steep bare rock in deepwater and rapid stream
  • Bored pile platform construction method on covering-free steep bare rock in deepwater and rapid stream

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Embodiment

[0039]Embodiment: This embodiment specifically relates to a construction method of a bored pile platform on steep bare rock without covering layer in deep-water rapids. This embodiment will take the Qianjiang Super Bridge Project as an example to describe in detail. The project is located in Qianjiang, Guangxi, where the river is deep and the water is fast. ° between different; the main bridge is a 106+200+106m three-span prestressed concrete continuous rigid frame, 3#, 4# piers are continuous rigid frame main piers in the water, the two piers have the same structure, and the caps have a spindle-shaped outline , 3 rows of 15 φ2.5m rock-socketed bored piles are arranged in each pier. The pile foundation is required to be embedded in complete moderately weathered dolomite (frk=80MPa) not less than 10m, and underwater C40 concrete is used.

[0040] The bored pile platform in this embodiment specifically includes a framed platform and a steel casing for bored piles, and a framed d...

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Abstract

The invention belongs to the field of bridge construction, in and particularly relates to a bored pile platform construction method on covering-free steep bare rock in deepwater and rapid stream. A specific scheme of the invention is as follows: the bored pile platform construction method comprises the following steps of: building a frame-type platform at the downstream side of a trestle bridge, wherein the frame-type platform is supported by a plurality of steel pipe piles, and the steel pipe piles are anchored inside the steep bare rock surface by adopting an anchor bolt grouting and rock-socketing technology; setting off a steel casing to the steep bare rock surface in a limiting manner by a guide frame arranged on the frame-type platform, and casting underwater concrete in the steel casing till the underwater concrete is filled in the bottom of the steel casing and the interior of a steel enclosure to form a stable underwater cofferdam; and then, carrying finishing subsequent construction of a bored pile. The bored pile platform construction method disclosed by the invention has the advantages of reducing the deep diving operation load and the construction risk by adopting an underwater exploration technology, enabling the steel pipe piles to be firmly anchored on the steep bare rock surface by adopting the anchor bolt grouting and rock-socketing technology and solving the technical problems of fixing a bottom opening of the steel casing of the bored pile and grout leakage in the boring process due to the adoption of the steel cofferdam at the bottom of the steel casing.

Description

technical field [0001] The invention belongs to the field of bridge construction, and in particular relates to a method for constructing a bored pile platform on a steep bare rock without covering layer in deep water rapids. Background technique [0002] With the development of social economy, the demand for convenient transportation is becoming more and more intense, and there are more and more bridge projects built on various geology. The deep-water bridge bored pile foundation drilling operation platform is a temporary construction facility that must be built. Floating water platforms are assembled with floating box ships, but a large number of facilities such as rope anchors and positioning ships are required; steel cofferdams can also be used as fixed operating platforms by using steel cofferdams first and then piles, steel cages or steel hanging boxes. In recent years, steel pipe piles, section steel, Bailey trusses or universal rods have been widely used to assemble f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B17/02E02D5/38E02D27/52E02D19/04
Inventor 刘学明文献杨刚陆锡振周慧丰陈选清
Owner MUNICIPAL ENVIRONMENTAL PROTECTION ENG CO LTD OF CREC SHANGHAI GRP
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