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Caisson cofferdam based on prepacked foundation bed

A construction method and foundation bed technology, which are applied in caisson, infrastructure engineering, construction and other directions, can solve the problems of wasting materials, time-consuming and laborious, and high cost, and achieve the effects of convenient construction, small demolition workload, and low engineering cost.

Inactive Publication Date: 2008-02-27
ZHONGCHUAN NO 9 DESIGN & RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] In the process of traditional dock construction, temporary cofferdams must be set up before the construction of the main structure of the dock can be carried out. Weirs generally occupy a large amount of water and cost a lot of money; the cost accounts for about 10% to 15% of the total cost of the dock project. After the completion of the dock construction, the demolition of the cofferdam is time-consuming and laborious, and wastes materials

Method used

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  • Caisson cofferdam based on prepacked foundation bed

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Embodiment

[0020] Taking the dock foundation pit as 450m×120m, the depth is 14m, the water retaining height is 13m, the outside is the sea area, and the geological conditions of the site are rock foundation, the specific construction steps are as follows:

[0021] 1. Foundation trench excavation and dredging

[0022] The foundation trench at the wharf is excavated to the rock face, the thickness of the riprap foundation bed is 2m, the bottom width is controlled at about 15m, and the silt is removed.

[0023] 2. Foundation bed riprap and leveling

[0024] Fill the foundation groove with rocks with a diameter of 80-200mm, and control the porosity at 40%. Set up the gravel dam body packed with slurry bags on both sides of the foundation bed, and cover it with geotextiles, and level the stone surface to a very fine level. And remove the floating mud on the surface.

[0025] 3. Caisson prefabrication and sinking

[0026] The width of the caisson is 13m, the height is 12m, and the length is...

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Abstract

The present invention discloses one kind of caisson coffer based on foundation bed grouting and its construction process. The caisson coffer is constructed through the following steps: digging foundation ditch and desilting, filling rubble and leveling, prefabricating and sinking caisson, grouting foundation bed, grouting curtain, etc. The present invention has the advantages of high stability, easy construction, saving in material, short construction period, less environmental influences, small coffer demolishing workload and low engineering cost.

Description

technical field [0001] The invention relates to a cofferdam of a hydraulic structure and a construction method thereof, in particular to a caisson cofferdam based on raising slurry from a foundation bed and a construction method thereof. Background technique [0002] In the process of traditional dock construction, temporary cofferdams must be set up before the construction of the main structure of the dock can be carried out. The weir generally occupies a large amount of water area, and the cost is huge; the cost accounts for about 10% to 15% of the total cost of the dock project, and the demolition of the cofferdam after the dock construction is completed is time-consuming and labor-intensive, which wastes materials. Contents of the invention [0003] The object of the present invention is to provide a caisson cofferdam and its construction method based on subgrade bed slurry raising in view of the deficiencies in the prior art. The environmental impact is small, and th...

Claims

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Application Information

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IPC IPC(8): E02D19/04E02D15/00E02D23/00E02D27/52
Inventor 林靖钱玉奇石祝高左宇玲王遂赵洪琼顾开云毕学敏
Owner ZHONGCHUAN NO 9 DESIGN & RES INST
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