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Underwater environment-friendly construction technology for large cast-in-situ bored pile

An environmentally friendly technology for bored piles, which can be used in earth-moving drilling, dewatering/drying/concentrating sludge treatment, wellbore/well components, etc. The quality is easy to guarantee, the operation is simple and intuitive, and the effect of solving the high consumption

Active Publication Date: 2014-12-10
THE THIRD ENG CO LTD OF CCCC SECOND HIGHWAY ENG BUREAU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an environmentally friendly construction technology for large-scale underwater bored piles, which effectively solves the problem of mud discharge during construction, and has the characteristics of low mud consumption, low environmental pollution, and high efficiency.

Method used

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  • Underwater environment-friendly construction technology for large cast-in-situ bored pile
  • Underwater environment-friendly construction technology for large cast-in-situ bored pile
  • Underwater environment-friendly construction technology for large cast-in-situ bored pile

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Embodiment 1

[0020] Such as figure 1 As shown, the drilling rig 1 is connected to the underwater construction through the water construction platform 2, and the periphery is protected by a steel barrel 3. The excavated mud is separated by the mud separator 4, and the inferior mud with a diameter greater than 0.074mm is separated. , keep the high-quality mud whose particle diameter is less than 0.074mm, and circulate the high-quality mud for drilling wall protection. The high-quality mud flows back to the construction site through the high-quality mud return pipe 6, and the waste mud is transported to the mud ship 7 through the diversion tank 5, and transported by sea The waste mud is transported to the on-road sludge treatment system 10 for treatment by land transportation, and the treated mud is transported to the spoil yard for later use. The tail water produced during drying is collected by the water collection well 8 and processed through the treatment well 9, and is collected and conc...

Embodiment 2

[0025] Describe the detailed process flow during construction:

[0026] The sludge in the bored pile is separated by the separator and transported to the mud ship by the diversion tank, and then transported to the shore by the mud ship, where it is grabbed by the tower crane on the shore foundation with a grab bucket to the land vehicle, and transported by the vehicle Go to the drying field for harmless treatment. During the treatment process, the leachate formed by the sludge will be collected and concentrated, and then circulated for the preparation of bored pile mud.

[0027] The sludge treatment system is mainly composed of drying field, sand drying field, tail water collection and concentration pool and other parts. The sludge transported to the treatment plant is usually dried naturally for 4 to 5 days in the sludge drying plant, then cleared and transported to the sand drying plant for further dehydration treatment, and when the moisture content drops to about 50%, it i...

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Abstract

The invention relates to an underwater construction technology, particularly to the underwater environment-friendly construction technology for a large cast-in-situ bored pile. The underwater environment-friendly construction technology is characterized in that slurries in construction are screened by a slurry separator; the poor-quality slurries with the slurry particle diameters larger than 0.074 mm are separated and discharged to the outside; the good-quality slurries with the slurry particle diameters smaller than 0.074 mm are reserved; the good-quality slurries are circularly applied in bored holes for protecting walls; the slurries discharged to the outside are transported to slurry ships through guide grooves, and then are transported to an overland sludge treatment system by sea transportation and land transportation for further drying treatment; and in the overland sludge treatment system, the transported slurries discharged to the outside are dried through a drying bed firstly, are transferred to a sand drying bed for sand drying after naturally dried for a period of time, and are transported to a mud disposal area for later use when the water content is reduced to be 50%. The underwater environment-friendly construction technology is simple and intuitional, is economic and environment-friendly, easily guarantees the quality and overcomes the shortcomings of high consumption, high pollution, low efficiency and the like in the traditional technology.

Description

technical field [0001] The invention relates to an underwater construction technology, in particular to an environment-friendly construction technology for large underwater bored cast-in-place piles. Background technique [0002] During the construction of bored piles, it is usually necessary to add a large amount of high-performance mud to maintain the borehole wall, enhance the mechanical properties of the hole wall, improve the contact environment between the construction machinery and the hole wall, and improve the drilling success rate, thereby Avoid accidents such as hole wall collapse and borehole diameter reduction during construction. The mud added in the borehole has the physical and chemical characteristics of strong alkali and high viscosity, and is very harmful to the environment. Relevant studies have shown that the pH value of the mud discharged from the bored pile can reach more than 10, which is strong alkaline, and strong alkali It is fatal to the life act...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B21/06C02F11/12
Inventor 王勃巨高权胡敏高峰金程永志
Owner THE THIRD ENG CO LTD OF CCCC SECOND HIGHWAY ENG BUREAU