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Method for carrying out vertical desilting through rotary drilling

A technology of rotary drilling and rotary drilling machines, which is applied in the field of dredging the river bed in the lowered area of ​​the cofferdam, which can solve the problems of slow construction speed and unsuitable construction progress

Inactive Publication Date: 2020-10-27
ROAD & BRIDGE INT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the more common method is to use the "air lift reverse circulation" process for river bed dredging construction, but the construction speed of the "air lift reverse circulation" process is relatively slow, and it is not suitable for projects with high requirements on construction progress

Method used

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  • Method for carrying out vertical desilting through rotary drilling
  • Method for carrying out vertical desilting through rotary drilling
  • Method for carrying out vertical desilting through rotary drilling

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Embodiment Construction

[0014] Such as figure 1 As shown, a method for vertical desilting of a rotary drilling drill provided by the present invention, after the pile foundation construction is completed, the drilling platform 1 in the cofferdam range is dismantled span by span, and each span is removed, and the rotary drilling drill 2 is used to remove the silt. Dredging is carried out across the riverbed 3 below. In order to ensure the dredging effect, the drill bit of the rotary excavator 2 is vertically lowered to the dredging range for dredging.

[0015] The present invention is described below in conjunction with a specific embodiment:

[0016] Such as figure 2 As shown, the drilling platform 1 has 5 rows of load-bearing main girders 4 along the bridge direction, forming 4 spans. When the platform 1 is dismantled, it will be dismantled in 4 steps along the direction of the bridge and from downstream to upstream.

[0017] Such as image 3 As shown, first remove the two rows of steel pipe pil...

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Abstract

The invention provides a method for carrying out vertical desilting through rotary drilling. The method for carrying out vertical desilting through rotary drilling comprises the following steps: afterpile foundation construction is completed, arranging a rotary drilling machine on a pile foundation drilling platform; detaching the drilling platform span by span from the downstream part to the upstream part in a cross-bridge direction; once one span is detached, detaching panels and distribution beams between two rows of steel pipe piles of the span, and a main bearing beam at first, and afterdetaching, vertically descending a drill bit of the rotary drilling machine to desilt a riverbed below the span; and then detaching the bearing beams of the span, cleaning the remainder areas by therotary drilling machine, inspecting that elevation cleaning for the riverbed is completed, and then pulling away the steel pipe piles in the area. According to the method for carrying out vertical desilting through rotary drilling, the vertical desilting is carried out through rotary drilling, and a high construction progress and a good desilting effect are achieved; and the method for carrying out vertical desilting through rotary drilling is especially appliable to engineering with a high construction progress requirement.

Description

technical field [0001] The invention belongs to the field of bridge construction and relates to a method for dredging the river bed in the lowered area of ​​the cofferdam before lowering the cofferdam for the construction of the cap platform in the water. Background technique [0002] For the construction of deep-water caps, it is necessary to dredge the riverbed at the corresponding position before lowering the cofferdam to reduce the difficulty of cofferdam entry. At present, the more common method is to use the "air lift reverse circulation" process for river bed dredging construction, but the construction speed of the "air lift reverse circulation" process is relatively slow, and it is not suitable for projects with high requirements on construction progress. Contents of the invention [0003] The object of the present invention is to provide a cofferdam dredging method with fast construction progress and good dredging effect, which is suitable for use when the constru...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02F5/28E02D19/04
CPCE02D19/04E02F5/28
Inventor 唐剑汪泉庆周彦文柳林龚鹏鑫王晓忠
Owner ROAD & BRIDGE INT