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Soft soil foundation large scale steel float lock head construction method

A soft soil foundation and construction method technology, which is applied in the direction of basic structure engineering, ship locks, and ship lifting devices, can solve the problems of long construction period, high engineering difficulty, and high cost, and achieve saving construction materials, good water-stop effect, Engineering quality reliable results

Inactive Publication Date: 2008-09-10
ZHONGCHUAN NO 9 DESIGN & RES INST
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Problems solved by technology

[0002] In the traditional gate construction process, temporary cofferdams must be set up to construct the main structure. The common ones are double-row steel sheet pile cofferdams, throwing earth-rockfill dam cofferdams, etc. Cofferdams generally occupy a large amount of water and cost a lot of money. It is huge, and it will take time and effort to dismantle the main body after construction. Especially in the construction of the gate head in the area with soft soil foundation and deep water, there are disadvantages of high engineering difficulty, large water area, long construction period, and large engineering investment.

Method used

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  • Soft soil foundation large scale steel float lock head construction method

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Embodiment

[0018] Taking a new ship lock project as an example, the geological conditions are soft soil foundation, and the front water depth is about -10.0m. The specific construction steps are as follows:

[0019] 1. Foundation trench excavation and dredging

[0020] The foundation trench is excavated to -14.2m, the width is 30m, the slope meets the design requirements, and the silt is removed.

[0021] 2. Prefabricated piles

[0022] Using water piling boats to drive piles, control elevation and check penetration, drive 600×600mm prefabricated large-headed square piles with a length of 38m into the soft soil layer under the foundation trench.

[0023] 3. Foundation bed riprap and leveling

[0024] There are two stone layers of 200mm in the bottom layer of the foundation bed, and a 1.8m concrete cushion is poured on the riprap layer. The concrete cushion needs to be wrapped around the top layer of the pile head and scraped off, and then the top layer is thrown with stones with a diam...

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Abstract

The invention discloses a soft soil base large-scale steel floating box lock head construction method, which is characterized in that the specific construction steps comprise that: a foundation trench is excavated and silt is removed; a precast pile is beaten; a foundation bed is ripraped and a concrete cushion coat is poured and tamped; a steel floating box is precast and submerged; a waterproof purdah is jet grouted. Compared with the prior art, the invention has the characteristics of strong applicability, mass construction material saving, low construction cost and reliable construction quality; a lock head steel floating box can be also used as construction cofferdam; the soft soil base large-scale steel floating box lock head construction method is in particular suitable for building the lock head in an area with a soft soil base and deep water and can achieve good waterproof effect no matter how depth the foundation bed is.

Description

technical field [0001] The invention relates to a hydraulic structure, in particular to a construction method for a large-scale steel buoyant gate on a soft soil foundation. Background technique [0002] In the traditional gate construction process, temporary cofferdams must be set up to construct the main structure. The common ones are double-row steel sheet pile cofferdams, throwing earth-rockfill dam cofferdams, etc. Cofferdams generally occupy a large amount of water and cost a lot of money. It is huge, and it will take time and effort to dismantle it after the main body is constructed. Especially in the construction of the gate head in the area with soft soil foundation and deep water, there are disadvantages of high engineering difficulty, large water area, long construction period, and large engineering investment. Contents of the invention [0003] The object of the present invention is to design a construction method for the large-scale steel buoyant sluice head o...

Claims

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Application Information

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IPC IPC(8): E02C1/00E02D19/04
CPCY02A10/30
Inventor 钱玉奇胡小明顾倩燕姚根洪陈映华王晓冬
Owner ZHONGCHUAN NO 9 DESIGN & RES INST
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