Piling beam cofferdam construction method used for bare rock foundation construction in water

A technology for steel sheet pile cofferdam and foundation construction, which is applied in basic structure engineering, construction and other directions to achieve the effects of high practical value, reasonable overall stress and enhanced stability

Active Publication Date: 2014-05-07
CHINA RAILWAY FIRST GRP CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a steel sheet pile cofferdam construction method for bare rock foundation construction in water, which has simple steps, low construction cost, high construction efficiency and good construction effect. , which solves the construction problem that the steel sheet pile cofferdam cannot be directly embedded in the bare rock riverbed

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  • Piling beam cofferdam construction method used for bare rock foundation construction in water
  • Piling beam cofferdam construction method used for bare rock foundation construction in water
  • Piling beam cofferdam construction method used for bare rock foundation construction in water

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Embodiment Construction

[0037] Such as figure 1 , figure 2 , Figure 6 and Figure 7 As shown, in the construction method of steel sheet pile cofferdam for bare rock foundation construction in water according to the present invention, the cofferdam 1 used is surrounded by a plurality of steel sheet piles 2 closely connected in sequence, and the cofferdam 1 is fastened and embedded in the bare rock in water. A steel sheet pile cofferdam in the rock 3 and used for construction of a water cap foundation, and the method includes the following steps:

[0038] Step 1. Determination of cofferdam structure size and construction location: According to the structure, size and construction location of the submerged cap foundation to be constructed, combined with the river bed geology and hydrology conditions at the construction site and the work space to be reserved during cofferdam construction, determine The structure, size, construction position of the cofferdam 1 and the embedding depth of the bottom em...

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Abstract

The invention discloses a piling beam cofferdam construction method used for bare rock foundation construction in water. The construction method provided by the invention is characterized in that the cofferdam is formed through multiple piling beams which are successively closely connected, the cofferdam is firmly embeded in the bare rock in water and the piling beam cofferdam is used for constructing a cushion cap foundation in water; the construction method comprises the following steps: firstly, determining cofferdam structural size and construction location; secondly, hole-drilling construction of an installing groove on cofferdam bottom: adopting impulse type drilling equipment to drill multiple occlusion drill holes and correspondingly forming the installing groove used for fixing the cofferdam bottom along the periphery of the cofferdam; thirdly, installing groove backfilling construction of the cofferdam bottom: adopting river sand to backfill the installing groove; and fourthly, cofferdam construction: carrying out inserting piling and fold construction on the multiple piling beams, and forming a close cofferdam after the fold. The construction method provided by the invention has the advantages of simple steps, lower construction cost, high construction efficiency and good construction effect, and solves the construction problem that the piling beam cofferdam can not be directly embed in a river bed of the bare rock.

Description

technical field [0001] The invention belongs to the technical field of foundation construction in water, and in particular relates to a method for constructing steel sheet pile cofferdams for bare rock foundation construction in water. Background technique [0002] Steel sheet pile cofferdam is a commonly used construction method in bridge foundation construction. It mainly uses the strong rigidity and good water-proof function of steel sheet pile to provide support for foundation pit excavation in water or high groundwater level. Realize the safe operation of construction personnel and equipment in the dry cofferdam. When the steel sheet pile cofferdam is actually constructed, the depth of the steel sheet pile embedded below the ground of the foundation pit is the most important factor affecting the safety and stability of the entire cofferdam. The shallower the embedded depth of the steel sheet pile, the less safe the cofferdam. However, in bare rock riverbeds, especially...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D19/04E02D27/14E02D27/52
Inventor 徐宏范恒秀胡文俊廖文华曹义昌朱宝君
Owner CHINA RAILWAY FIRST GRP CO LTD
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