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Waste slurry circulating method and system for shield in weathered argillaceous siltstone stratum tunneling

A siltstone and weathering technology, applied in chemical instruments and methods, earthwork drilling, mining wastewater treatment, etc., can solve problems such as incomplete separation of slag and soil, and achieve lower pulping costs, high separation accuracy, and low sand content. Effect

Pending Publication Date: 2020-09-01
ERCHU CO LTD OF CHINA RAILWAY TUNNEL GRP +1
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AI Technical Summary

Problems solved by technology

[0003] However, the above-mentioned technology has the technical problem of incomplete separation of muck and soil in the actual application process.

Method used

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  • Waste slurry circulating method and system for shield in weathered argillaceous siltstone stratum tunneling
  • Waste slurry circulating method and system for shield in weathered argillaceous siltstone stratum tunneling
  • Waste slurry circulating method and system for shield in weathered argillaceous siltstone stratum tunneling

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Embodiment

[0039] like figure 1 Shown, method of the present invention comprises the steps:

[0040] Step 1, primary selection of waste slurry, use the shield machine slurry discharge pipeline and the slurry discharge pump station to discharge the waste slurry to the mud-water separation equipment 1 for separation treatment, and the large pieces of material on the screen ≥ 4 ~ 250mm fall to the slag Collecting device 9, the underscreen mud enters the primary slurry storage tank 11 of the mud-water separation equipment 1;

[0041] Step 2, the primary cyclone separator 2 is separated and dehydrated, the primary slurry storage tank 11 of the mud-water separation equipment 1 is connected to the primary cyclone separator 2, and the primary cyclone separator 2 is 0.074 ~ 4mm The sand material is screened out and the sand material is delivered to the slag collection device 9;

[0042] Step 3, the secondary cyclone separator 3 is separated and dehydrated, the secondary cyclone separator 3 is c...

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Abstract

The invention discloses a waste slurry circulation method and system for shield in weathered argillaceous siltstone stratum tunneling. The method comprises the following steps of: 1, primary selectionof waste slurry: discharging the waste slurry to slurry-water separation equipment through a slurry discharging pump station and by means of the slurry discharging pipeline of a shield tunneling machine so as to subject the waste slurry to separation treatment; step 2, separation and dehydration by a primary cyclone separator; step 3, separation and dehydration by a secondary cyclone separator; step 4, dewatering by a horizontal spiral discharging sedimentation centrifuge; and 5, transferring treated usable slurry to a slurry pool of the shield tunneling machine by the horizontal spiral discharging sedimentation centrifuge to reuse the treated usable slurry. The system comprises slurry-water separation equipment, a primary cyclone separator, a secondary cyclone separator, a sedimentationtank, a horizontal spiral discharging sedimentation centrifuge, a clear liquid pool and a size mixing tank. Muck soil and muddy water are effectively separated through muddy water system equipment, separated mud indexes meet shield tunneling slurry indexes again, and therefore the purpose of recycling waste slurry is achieved.

Description

technical field [0001] The invention relates to the technical field of shield tunnel construction, in particular to a waste slurry circulation method and a system thereof in excavation of weathered argillaceous siltstone formations by shield tunneling. Background technique [0002] In recent years, with the rapid development of cities, there are more and more urban rail transit constructions. The shield method tunnel construction technology has become the main choice for urban subway construction and urban cross-river tunnel construction. High, low construction noise, light pollution, low energy consumption, and little impact on land subsidence have been widely used in urban tunnel construction. Among them, the mud water shield is injected with mud water through the sealed compartment of the excavation surface, and the mud water is pressurized and external pressure is balanced to ensure the stability of the soil on the excavation face. When the shield is advanced, the excava...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/02E21D9/06C02F103/10
CPCC02F9/00E21D9/06C02F1/001C02F1/38C02F2001/007C02F2301/08C02F2103/10
Inventor 郭小龙刘海龙易定达龚学栋胡飞王丙坤张烨之罗成彭焱锋李志军龙成明章云生马才孟阳任晓旺张嘉庆刘凯洪开荣王秋林李鹏
Owner ERCHU CO LTD OF CHINA RAILWAY TUNNEL GRP
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