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Deepwater cofferdam slot sinking construction method

A construction method and cofferdam technology, applied in caissons, infrastructure engineering, construction, etc., can solve the problems of difficult sinking of cofferdams, delay of construction period, rework, etc., and achieve the effect of convenient construction, high reliability and simple method

Inactive Publication Date: 2011-04-13
ANHUI HIGHWAY BRIDGE ENG CO LTD
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the foundation is buried deep and the soil or rock of the river bed is hard, the cofferdam is difficult to sink and prone to position deviation due to the large sinking resistance
Foundation construction is the key to the construction of large-scale bridge projects. Many projects often delay the construction period or cause rework due to the failure of the cofferdam to sink smoothly, resulting in greater losses

Method used

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  • Deepwater cofferdam slot sinking construction method
  • Deepwater cofferdam slot sinking construction method
  • Deepwater cofferdam slot sinking construction method

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Embodiment Construction

[0019] Such as figure 1 , figure 2 As shown, this embodiment is aimed at building pile foundations and caps in deep water and then constructing bridge piers. In order to construct caps and piers, cofferdams must be built around the designed caps to provide water-free construction environment.

[0020] The construction process of the cofferdam in this embodiment is to firstly carry out the construction of the pile foundation 1, and then carry out the construction of the cofferdam. When constructing the cofferdam, first use the slotting equipment to slot the designed cofferdam position through the water construction platform, that is, the position where the cofferdam wall 2 will fall, to form the groove 5; then use the cofferdam wall 2 to use its own gravity To sink into the groove 5 provided, the steel cofferdam wall 2 is adopted. The steel cofferdam wall 2 can be prefabricated as a whole and then sink into the groove 5, or it can be divided after the cofferdam wall 2 is pos...

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Abstract

The invention discloses a deepwater cofferdam slot sinking construction method, which is characterized by comprising the following processes in turn: before cofferdam wall sinking construction, forming a slot at the design position of the cofferdam wall on a riverbed by using slotting equipment; sinking the cofferdam wall into the formed slot; removing soil on the riverbed on the inner side of the cofferdam wall; and casting construction bottom sealing concrete, and forming a cofferdam after the bottom sealing concrete reaches a strength. The slotting operation is performed at the design position on the riverbed by using the slotting equipment and then the cofferdam can be smoothly put into the slot so as to prevent the over hard riverbed from blocking the sinking of the cofferdam and ensure that the position of the cofferdam is matched with the design position.

Description

technical field [0001] The invention relates to a construction method of a deep-water foundation of a bridge, more specifically a construction method of a deep-water cofferdam. Background technique [0002] At present, in the foundation construction of bridges spanning large rivers, in most cases, the cofferdam is used to enclose water to form a water-isolated operating environment, and then the foundation construction is carried out after the water in the cofferdam is drained. However, when the depth of the foundation is large and the soil or rock of the river bed is hard, the cofferdam is difficult to sink and prone to position deviation due to the large sinking resistance. Foundation construction is the key to the construction of large-scale bridge projects. Many projects often delay the construction period or cause rework due to the failure of the cofferdam to sink smoothly, resulting in greater losses. Contents of the invention [0003] The present invention provides...

Claims

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Application Information

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IPC IPC(8): E02D23/08E02D19/04
Inventor 戴良军刘要武陈莘崔林钊汪卫东彭申凯
Owner ANHUI HIGHWAY BRIDGE ENG CO LTD
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