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Scouring device for immersed tube and scouring method for immersed tube

An immersed pipe and mud flushing technology, which is applied in construction, artificial island, infrastructure engineering, etc., can solve the problems of reduced construction efficiency, difficult excavation of pipe grooves, and low soil bearing capacity, so as to improve engineering efficiency, reduce interference, smooth sinking effect

Active Publication Date: 2021-05-04
南京市市政设计研究院有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when encountering large-scale river courses with soft soil foundations, the soil bearing capacity of this layer is low. When using the traditional immersed pipe scheme, the pipe grooves are difficult to excavate and easy to collapse when excavating the pipe grooves, which reduces the construction efficiency and needs to be improved.

Method used

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  • Scouring device for immersed tube and scouring method for immersed tube
  • Scouring device for immersed tube and scouring method for immersed tube
  • Scouring device for immersed tube and scouring method for immersed tube

Examples

Experimental program
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Effect test

Embodiment 1

[0037] refer to figure 1 , a sinking device for immersed tubes, including several mud flushers 2 arranged on the lower side of the immersed tube 1 for injecting high-pressure water flow, preferably seven, and several mud flushers 2 are arranged along the axis of the immersed tube 1 In the direction setting, the mud flushing device 2 is connected with a water pump 3; sink the immersed tube 1 and the mud flushing device 2 into the water, and when the immersed tube and the mud flushing device sink to the bottom of the water, the water pump 3 is used to input water into the mud flushing device 2, The mud flusher 2 shoots high-pressure water to the soil layer below the immersed tube 1, and the soil layer is liquefied, reducing the load-bearing capacity of the soil layer, so that the immersed tube 1 can sink into the bottom of the water smoothly, instead of excavating pipe grooves at the bottom of the water, improving construction efficiency.

[0038] refer to figure 1 The immerse...

Embodiment 2

[0043] A sinking method for immersed tubes, the specific construction steps are:

[0044] (1) Install the strain gauge and the counterweight on the upper side wall of the immersed tube respectively, and install the mud flusher on the lower side wall of the immersed tube;

[0045](2) Submerge the mud flusher and immersed tube into the water together. When the immersed tube and mud flusher sink to the bottom of the water, the water will be input into the hose through the water pump, and the hose will then input the water into the mud flusher, one-way The valve injects high-pressure water to the soil layer at the bottom of the immersed tube to liquefy the soil at the bottom of the immersed tube. The strain gauge detects the strain on the immersed tube in real time and transmits the data to the stress detector. If the strain exceeds the set value, the mud is flushed through the pump control The water pressure sprayed by the device can adjust the sinking depth of the immersed tube ...

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Abstract

The invention discloses an scouring device and an immersed tube scouring method for immersed tubes, which relate to the technical field of immersed tube construction and aim to solve the problem of excavating pipe grooves on large river channels on soft soil foundations. The technical problem that the pipe groove is difficult to dig and easy to collapse, the key points of the technical solution include several mud flushers for injecting high-pressure water flow arranged on the lower side of the immersed tube, and several of the mud flushers are arranged along the axis of the immersed tube. The mud flushing device is connected with a water pump. When sinking the immersed tube, put the immersed tube and the mud flushing device into the water at the same time. The soil layer at the bottom of the tube liquefies the soil at the bottom of the immersed tube and loses its bearing capacity, so that the immersed tube can be successfully buried in the water bottom of the soft soil foundation, which can replace the method of excavating the tube groove, which is conducive to improving engineering efficiency.

Description

technical field [0001] The invention relates to the technical field of immersed tube construction, more specifically, it relates to a sinking equipment and method for immersed tubes. Background technique [0002] The traditional immersed tube adopts underwater excavation of the pipe groove and riprap to level it out. After the steel pipe is assembled, it is floated in place, filled with water and sinks, and the underwater riprap is heavy. recover. The direction of the pipeline should be combined with the topography and engineering geology, and it should be arranged on a straight river section where the main stream of the river does not fluctuate much. [0003] The trench is constructed using the traditional underwater large-scale excavation method. The main construction procedures are: parameter calculation-measurement and setting-out-pipeline welding-non-destructive testing-pressure test-corrosion repair-pipe trench excavation-sludge pumping-ditch bottom Measurement - dri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D29/073
Inventor 杨兵陈辰吴昊朱亮张树俊宋奎
Owner 南京市市政设计研究院有限责任公司