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Comprehensive construction method for pre-cut groove loop-sealing double-wall steel cofferdam deep water foundation

A double-wall steel cofferdam and deep-water foundation technology, applied in infrastructure engineering, construction, etc., to achieve the effects of reducing environmental hazards, shortening the construction period, and reducing construction difficulty and risks

Active Publication Date: 2018-04-03
中铁二十二局集团第四工程有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the actual implementation process, some quality and safety accidents or hidden dangers have appeared to varying degrees.

Method used

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  • Comprehensive construction method for pre-cut groove loop-sealing double-wall steel cofferdam deep water foundation
  • Comprehensive construction method for pre-cut groove loop-sealing double-wall steel cofferdam deep water foundation
  • Comprehensive construction method for pre-cut groove loop-sealing double-wall steel cofferdam deep water foundation

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Embodiment 1

[0048] The present invention takes the Mengxi-Central China railway coal transportation channel project as an example. The Ji'an Ganjiang Super Bridge site is located 9.6km downstream of the Jinggangshan Bridge in Ji'an City, and 4.6km downstream of the new Jinggangshan Bridge under construction. Starting and ending mileage: DK1867+993.480~DK1870+863.300, center mileage: DK1869+428.39, total length 2869.82m.

[0049] The bridge site crosses the Ganjiang River at DK1868+350.8~DK1869+350. The intersection angle between the river and the line is 95°. There are no embankments on both sides of the river. The river is open to navigation. It is currently a Class V channel and is planned to be a Class III channel with a clear navigation height of 10m. It is navigable for 1000t ships, and the highest navigable water level is taken as H=50.59m. At the bridge site across the Gan River: H1%=52.16m, Q1%=23347m3 / s, H2%=51.53m, Q2%=21400m3 / s, H5%=50.59m, Q5%=18600m3 / s, H10%=50.01 m, H20% =...

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Abstract

The invention discloses a comprehensive construction method for a pre-cut groove loop-sealing double-wall steel cofferdam deep water foundation. The method includes the following steps that (1) a trestle and a platform are set up; (2) pile foundation construction is performed; (3) a rotary excavating drill is used for precutting of grooves in a riverbed at the double-wall steel cofferdam blade foot position; (4) cofferdam splicing is conducted; (5) a cofferdam tripping system and a continuous jack are installed; (6) cofferdam tripping is carried out; and (7) the cofferdam bottom is sealed. According to the comprehensive construction method for the pre-cut groove loop-sealing double-wall steel cofferdam deep water foundation under complicated geological conditions, the construction technological level is perfected and improved, the purpose that the construction technology is advanced, reasonable, economical and safe is achieved, experience is provided for similar construction, and an important guiding function is provided for deep water foundation construction and cofferdam construction works.

Description

technical field [0001] The invention relates to the field of building and bridge construction, in particular to a comprehensive construction method for a deep-water foundation of a pre-cut ring-sealed double-wall steel cofferdam under complex geological conditions. Background technique [0002] With the rapid development of domestic and international bridge engineering, human beings have started bridge construction in rivers, lakes and seas. However, with the expansion of the construction scope, various technological innovations have appeared in deep-water foundation construction. [0003] At present, double-wall steel cofferdam construction caps are used in water construction at home and abroad, which is more common at home and abroad. The method of piles first and weirs or weirs and piles is mainly used for construction, and the assembly method can choose overall floating transportation, floating crane hoisting, in-situ block assembly and other processes. The process of d...

Claims

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Application Information

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IPC IPC(8): E02D19/04
CPCE02D19/04Y02E10/20
Inventor 吕广军林斌白子斌高英杰邓寿军陈延军尹骥王孝先朱波
Owner 中铁二十二局集团第四工程有限公司
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