Construction method for steel cofferdams in complex torrential water area

A construction method and technology of steel cofferdams, which are applied in the direction of infrastructure engineering, buildings, sheet pile walls, etc., can solve the problems of turbulent water flow, low recycling rate, difficult positioning and stability, etc., so as to reduce the impact of frontal water flow and Lateral water pressure, simplified construction steps, and obvious advantages in technical benefits

Active Publication Date: 2021-08-06
ZHEJIANG UNIV CITY COLLEGE
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When encountering complex and turbulent waters, the installation of steel sheet piles will encounter many disadvantages
At present, the construction of steel cofferdams in this situation usually adopts double-wall steel cofferdams. However, when the double-wall steel cofferdams are lowered, due to the strong turbulent water flow, it is difficult to position them stably, and the recycling rate is low, resulting in high project costs and long construction periods. long

Method used

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  • Construction method for steel cofferdams in complex torrential water area
  • Construction method for steel cofferdams in complex torrential water area
  • Construction method for steel cofferdams in complex torrential water area

Examples

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Effect test

Embodiment 1

[0036] The steel cofferdam in complex and turbulent waters includes underwater cofferdam support 1, double-layer steel cofferdam 2, underwater bracket 3, diamond-shaped fixed pile groups, corner fixed steel pipe piles 7, and single-layer steel cofferdam 8 , guide bracket 9, guide pile 10, guide beam 11, bracing frame 12 and steel casing 13, described rhombus fixed pile group and corner fixed steel pipe pile 7 are all provided with underwater bracket 3, and described rhombus fixed The pile group and corner fixed steel pipe piles 7 are arranged on the turbulent side of the cofferdam construction of the river widening section, and the corner fixed steel pipe piles 7 are arranged on both sides of the diamond-shaped fixed pile group, and the underwater cofferdam supports 1 is set on the underwater bracket 3, the double-layer steel cofferdam 2 is set and fixed on the outside of the underwater cofferdam support 1, and the side of the corner fixed steel pipe pile 7 is provided with a g...

Embodiment 2

[0042] The construction method of the steel cofferdam in complex turbulent waters firstly carries out the construction of diamond-shaped fixed pile groups and the construction of two corner fixed steel pipe piles, then hangs the underwater cofferdam support on the surface facing the turbulence, constructs a double-layer steel cofferdam, and then Carry out the simultaneous construction of guide piles, guide beams, and single-layer steel cofferdams on both sides and the construction of inner guide piles, guide beams, and single-layer steel cofferdams, and then set up steel casings in the steel cofferdams. The steel casing of the weir is used for the construction of the support frame above the water, which is used for later pumping to resist the external water pressure, followed by the construction of the external guide piles, guide beams, and single-layer steel cofferdam. Finally, the inside of the steel cofferdam is dredged and the underwater concrete is poured The back cover, t...

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Abstract

The invention relates to a construction method for steel cofferdams in a complex torrential water area. The method comprises the following steps that, firstly, a rhombic fixed pile group and two corner fixed steel pipe piles are constructed; then an underwater cofferdam support is hoisted on a turbulent flow facing surface, and a double-layer steel cofferdam is constructed; then, guide piles, guide beams and a single-layer steel cofferdam on two sides are synchronously constructed, and guide piles, guide beams and a single-layer steel cofferdam on the inner side are constructed; next, steel casings are driven in the steel cofferdams, and overwater support frames are constructed on the steel casings close to the steel cofferdams for later water pumping to resist the pressure of outer water; next, guide piles, guide beams and a single-layer steel cofferdam on the outer side are constructed; and finally, desilting is conducted in the steel cofferdams, underwater concrete is poured for bottom sealing, and water in the steel cofferdams is pumped. The construction method has the beneficial effects that a supporting frame with the sliding rail system is arranged between the peripheral steel pile casings and the guide beams, so that the steel pile casings can be used for supporting the steel cofferdams, and the influence of continuous driving of steel pile casings can be avoided.

Description

technical field [0001] The invention relates to the technical field of pile foundation construction, in particular to a construction method of a steel cofferdam in complex and turbulent waters. Background technique [0002] In recent years, my country has vigorously developed infrastructure, and has made great achievements with the country's vigorous investment and development. There are more and more long-span bridge and water building construction projects, among which the construction of water foundation is the key. As one of the important temporary structures in underwater foundation construction, steel sheet pile cofferdam will have a good application prospect in underwater foundation construction due to its many advantages. [0003] my country's water area is widely distributed, and the situation is complex and diverse. When encountering complex and turbulent waters, the installation of steel sheet piles will encounter many disadvantages. At present, the constructio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D19/04E02D27/12E02D27/14E02D5/28
CPCE02D19/04E02D27/12E02D27/14E02D5/28E02D2300/0029E02D2250/0061
Inventor 王新泉刁红国崔允亮魏纲
Owner ZHEJIANG UNIV CITY COLLEGE
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