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Construction method of lock catch steel tubular pile cofferdam suitable for high water head of estuary

A technology of locking steel pipes and construction methods, which is applied to sheet pile walls, foundation structure engineering, construction, etc., can solve problems such as difficulty in ensuring construction period requirements and enterprise benefit requirements, low rigidity, difficulty in ensuring construction safety, and large turnover loss, etc., to achieve Improve turnover utilization, save labor and equipment costs, and ensure continuity

Active Publication Date: 2019-08-02
CHINA COMM 2ND NAVIGATIONAL BUREAU 2ND ENG
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Problems solved by technology

Especially for the construction of ultra-high water head caps, the requirements are even higher. Traditional steel sheet pile cofferdams are difficult to guarantee construction safety due to their low rigidity; It is difficult to guarantee the construction period requirements and enterprise benefit requirements

Method used

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  • Construction method of lock catch steel tubular pile cofferdam suitable for high water head of estuary
  • Construction method of lock catch steel tubular pile cofferdam suitable for high water head of estuary

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Embodiment Construction

[0034] The present invention will be further described in detail below in conjunction with the accompanying drawings, so that those skilled in the art can implement it with reference to the description.

[0035] Such as figure 1 As shown, the present invention provides a kind of construction method of the locking steel pipe pile cofferdam that is applicable to the high water head of estuary, comprises the following steps:

[0036] 1) Install the inner and outer purlins of the first layer section by section, and the distance between the inner and outer purlins is 2-3cm larger than the outer diameter of the locking steel pipe pile; wherein, the locking steel pipe pile includes the middle circular pile 1 and The C-shaped lock 2 and the I-shaped steel lock 3 are symmetrically distributed on both sides, and the two adjacent lock steel pipe piles cooperate with each other through the C-shaped lock and the I-shaped steel lock to realize the buckle connection; the lock A number of st...

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Abstract

The invention discloses a construction method of a lock catch steel tubular pile cofferdam suitable for a high water head of an estuary. The construction method comprises the following steps that a first layer of inner and outer side surrounding purlins are installed section by section; a first lock catch steel tubular pile is hoisted, vertically inserted into a riverbed, and vibrated and sunk byusing a vibrating hammer after the perpendicularity of the first lock catch steel tubular pile reaches the standard; a second lock catch steel tubular pile is hoisted, is connected with the first lockcatch steel tubular pile, and then sunk, and when the second lock catch steel tubular pile is driven to be flush with the first lock catch steel tubular pile, driving is stopped; the above steps arerepeated until all the lock catch steel tubular piles are driven completely, closure of the cofferdam is realized, and installation of the first layer of circuit purlins is finished. According to thecofferdam construction method, various technical difficulties of dry excavation construction of the ultrahigh water head embedded bearing platform are effectively solved, the construction period is greatly shortened, and the labor cost and the equipment cost are greatly reduced.

Description

technical field [0001] The invention relates to the field of cofferdam construction. More specifically, the present invention relates to a construction method for locking steel pipe pile cofferdams suitable for high water heads in sea estuaries. Background technique [0002] To construct caps in water, cofferdams must be set in water to form a dry construction environment for caps. At the same time, in the process of pumping water and mud suction, it is necessary to ensure that the cofferdam can resist the external water pressure and earth pressure. Especially for the construction of ultra-high water head caps, the requirements are even higher. Traditional steel sheet pile cofferdams are difficult to guarantee construction safety due to their low rigidity; It is difficult to guarantee the construction period requirements and enterprise benefit requirements. Contents of the invention [0003] In order to achieve the above objectives, the present invention provides a cons...

Claims

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Application Information

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IPC IPC(8): E02D19/04E02D5/28E02D13/06
CPCE02D5/28E02D13/06E02D19/04
Inventor 余勇洪东昕陈洪淋陈柯宇刘少华方磊彭勇胡庆宇张春阳臧宴民
Owner CHINA COMM 2ND NAVIGATIONAL BUREAU 2ND ENG
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