Gravity-type high-pressure water jetting impacting device and sinking assisting method thereof

Abstract

The invention discloses a gravity-type high-pressure water jetting impacting device and a sinking assisting method thereof and belongs to the field of sinking assisting in bridge sunk well foundationsinking construction. The gravity-type high-pressure water jetting impacting device comprises a straight-rod-shaped support and a plurality of water pipes extending in the length direction of the support and fixed to the support. Lifting points are arranged at the tail end of the support, pressurizing pump connecting openings are arranged at water pipe water inlets of the tail end of the support correspondingly, and variable diameter heads are arranged at water pipe water outlets of the front end of the support. According to the sinking assisting method, the lifting points of the support are suspended through a tower crane, pressurizing pumps are connected with the pressurizing pump connecting openings of all the water pipes, and multi-path high-pressure jet water of all the water pipe variable diameter heads simultaneously act on a commanding height to scatter hardened clay while the support vertically sinks. According to the gravity-type high-pressure water jetting impacting device and the sinking assisting method thereof, the defects that as for a traditional sink assisting measure of a powder clay layer, using convenience and rapidness are poor, and the sinking assisting effectis poor are overcome, the clay layer commanding height is eliminated in a targeted mode, the sinking assisting work efficiency is high, the used time is short, and cost is little.

Description

technical field [0001] The invention belongs to the field of sinking assistance in bridge caisson foundation sinking construction, and is suitable for the sinking construction of large caisson foundations or steel cofferdams in silty clay layers. Background technique [0002] 1) Traditional caisson sinking medium and high pressure water pipe sinking aid technology: [0003] The caisson foundation is an important structure in bridge foundation construction. When the large caisson foundation sinking construction encounters the clay formation, the mud suction effect is poor, the caisson sinks slowly, and the mud suction sinks. During conventional construction, the method of burying high-pressure water pipes on the well wall or partition wall is often used to break through the silty clay layer forming a hardened body and help the caisson to sink. Thereby improving the sinking efficiency. [0004] 2) Limitations of traditional construction techniques: [0005] In the construc...

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Problems solved by technology

[0006] The object of the present invention is to: propose a gravity-type high-pressure water jet impact device and its method for assisting sinking, overcome the shortcomings of poor convenience and poor sinking effect of traditional sinking measures in silty clay layers, and solve the commanding heights of the soil layer in a targeted manner. High efficiency of sinking aid, shorter time and less cost

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