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Construction Technology of Mining Soft Rock by Hydraulic Cutter Suction Vessel

A technology of soft rock and construction technology, which is applied in the direction of mechanically driven excavators/dredgers, construction, earth movers/shovels, etc., can solve the problems of low construction efficiency and high cost, and achieve the goal of ensuring construction efficiency, Effect of reducing wear rate

Active Publication Date: 2020-04-10
CCCC TDC ENVIRONMENTAL PROTECTION DREDGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The hydraulic cutter suction ship has the advantages of continuous operation, high production efficiency, and low construction cost. It is an important equipment for dredging, but it is subject to certain restrictions on rock conditions. At present, cofferdam dry excavation is generally used for rock conditions. The method is to use the cofferdam to drain the seawater in the area to be excavated, and then use land machinery to excavate. This method has low construction efficiency and high costs. However, for soft rocks, if a reasonable excavation method is adopted method and corresponding reasonable excavation equipment, the hydraulic cutter suction vessel still has the ability to excavate soft rock

Method used

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  • Construction Technology of Mining Soft Rock by Hydraulic Cutter Suction Vessel
  • Construction Technology of Mining Soft Rock by Hydraulic Cutter Suction Vessel

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Embodiment 1

[0042] Al Ruwais Port in Qatar is located about 120Km north of Doha. The soft rocks at the construction site in Qatar include sedimentary rocks. The length of the rock excavation construction pipeline in the inner section of the channel is 2,200 meters. The mud pumps are underwater pumps and No. 2 pumps, and the outer section is 3,300 meters. Three mud pumps are constructed in series. The design water depth of this project is -5.0 meters, the design excavation width is 100 meters, the allowable over-depth is 0.25 meters, and the allowable over-width is 2 meters. It is required that there is no shallow point in the sea sweeping measurement, and the bathymetry map is accurate to centimeters.

[0043] Concrete construction steps are identical with above-mentioned steps, wherein,

[0044]In the process of lowering the bridge 6, in order to ensure that the design water depth of the channel can be reached and the super-depth can be effectively controlled, and considering the influenc...

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Abstract

The invention discloses a construction process for exploiting weak rock through a hydraulic cutter suction dredger. The construction process comprises the following steps that S1, construction is prepared, specifically, an excavation area is determined, the cutter suction dredger is moved to the excavation area, a bridge is put down, and according to the thickness of a rock layer with the thickness of the rock layer being required to be 0.8-1.0 m, and in terms of the slope ratio of the rock layer of 1:5, an excavation point is determined; S2, the excavation area is constructed, specifically, single layer construction is conducted firstly, that is, gradually-deep section construction is started from the excavation point through an excavation device; and then a residual layer is constructed; and S3, the step S2 is repeated, construction work of a next excavation area enters. The construction efficiency is high, and the cost is low.

Description

technical field [0001] The invention relates to the technical field of dredging engineering, in particular to a construction technique for mining soft rock by a hydraulic cutter suction ship. Background technique [0002] The hydraulic cutter suction ship has the advantages of continuous operation, high production efficiency, and low construction cost. It is an important equipment for dredging, but it is subject to certain restrictions on rock conditions. At present, cofferdam dry excavation is generally used for rock conditions. The method is to use the cofferdam to drain the seawater in the area to be excavated, and then use land machinery to excavate. This method has low construction efficiency and high costs. However, for soft rocks, if a reasonable excavation method is adopted With the corresponding reasonable excavation equipment, the hydraulic cutter suction ship still has the ability to excavate soft rock. Contents of the invention [0003] The technical problem t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02F5/28E02F3/88E02F3/90E02F3/92
CPCE02F3/88E02F3/885E02F3/90E02F3/905E02F3/9293E02F5/28
Inventor 杨洪民刘杰章王建军
Owner CCCC TDC ENVIRONMENTAL PROTECTION DREDGING