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Drainage Construction Method of Reversed Slope TBM Excavation Tunnel

A construction method and tunnel technology, applied in drainage, earthwork drilling, mining equipment, etc., can solve problems such as no water to pump, sediment accumulation, serious problems, etc., and achieve the effects of reducing pumping distance, reducing investment, and saving costs

Active Publication Date: 2021-04-23
CHINA RAILWAY TUNNEL GROUP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the excavation construction process, the tunnel water gushing is mainly tunnel water seepage. In addition to the groundwater itself, the water quality also includes rocks, mud, and shotcrete rebound, which will cause sediment to accumulate in the water pump and affect the work of the water pump. Moreover, the existing drainage The inrush water volume was not considered during the construction, the drainage capacity could not meet the drainage demand, and the configuration of drainage pipes and water pumps was unreasonably optimized, resulting in severe water accumulation in some parts and no water to pump in some parts
The various problems faced in the above-mentioned drainage construction will cause water accumulation in the tunnel during the excavation construction process.

Method used

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  • Drainage Construction Method of Reversed Slope TBM Excavation Tunnel
  • Drainage Construction Method of Reversed Slope TBM Excavation Tunnel
  • Drainage Construction Method of Reversed Slope TBM Excavation Tunnel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1: For the anti-slope TBM excavation tunnel drainage construction method of a certain project, see the TBM construction section figure 1 , using a Φ8.02m open hard rock roadheader for construction.

[0034] The construction section is located in the downstream of the reservoir 1. The construction section of the main tunnel is from the No. 3 branch tunnel 101 to the 1942m downstream of the extension section 2 of the main tunnel, with a total length of 18.275km. 100m), main engine assembly hole 4 (80m), first deployment hole 5 (200m), first departure hole 6 (25m), TBM first tunneling section 7 (8310m), upstream connection section 8 (1500m), maintenance Hole 9 (60m), the second entry hole 10 (240m), the downstream connecting section 11 (1500m), the second starting hole 12 (25m) and the second tunneling section 13 of TBM (6235m).

[0035] The horizontal distance of No. 3 branch tunnel 101 is 3872m, the slope distance is 3885m, and the comprehensive slope is 8.18...

Embodiment 2

[0133] Embodiment 2: Drainage scheme of the branch hole, on the basis of Example 1, drain water through the branch hole.

[0134] Drainage scheme of 2# branch tunnel: add a 300mm drainage pipeline (No. 3) on the basis of the original two 300mm drainage pipelines (No. 1 and No. 2 pipelines, which can only be used after partial treatment) in 2# branch tunnel , No. 1 and No. 2 pipelines are pumped out of the cave with two-stage drainage, and No. 3 is pumped to the top with one pump and directly pumped out of the cave. Pipeline No. 1 is equipped with a MD280-215 water pump at the bottom of the cave to discharge to the original 2# water tank in the 2# branch cave, and a MD280-172 water pump is installed in the original 2# water tank to pump out the cave; No. 2 pipeline is in One set of MD250-151 water pump is installed at the bottom of the cave to pump and discharge to the original 3# water tank of the 2# branch cave, and one set of MD280-172 water pump is installed at the original...

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Abstract

The invention discloses a drainage construction method for a reverse-slope TBM excavation tunnel, aiming at solving the technical problem of water accumulation in the construction of a reverse-slope TBM excavation tunnel. It includes the following steps: predicting the normal water inflow and the maximum water inflow of the tunnel; installing water tanks at intervals in the tunnel, the number and volume of which are determined according to the maximum water inflow of the tunnel, the slope of the reverse slope and the length of the tunnel; Drainage pipes are set between adjacent to the water tanks, and pumping stations are set at each water tank, and each pumping station is provided with a plurality of water pumps, and the water in the tunnel is pumped and drained to the water tanks step by step through the water pumps, The water in the tunnel is drained in sections. The invention reduces the pumping distance, lowers the investment, rationally selects the inner diameter and material of the drainage pipe and the model of the water pump, can meet the demand for drainage and saves the cost to the greatest extent, and improves the drainage construction of the reverse slope of the tunnel by optimizing the configuration of the drainage equipment. Efficiency, reduce the cost of anti-slope drainage construction.

Description

technical field [0001] The invention relates to the technical field of tunnel drainage construction, in particular to a drainage construction method for reverse-slope TBM excavation tunnels. Background technique [0002] TBM (Tunnel Boring Machine) is a tunnel boring machine, which can realize the construction of long tunnels with complex geographical features and landforms that are difficult to realize by traditional drilling and blasting methods, and can realize parallel and continuous operations in construction procedures such as excavation, support, and slag discharge. [0003] During the tunnel construction process, the tunnel excavation often has a certain slope. When the tunnel excavation slope is along the slope, natural drainage can be used to achieve the purpose of drainage. However, when the tunnel excavation slope is reverse slope, the geological conditions are complex, the reverse slope tunnel distance is long, the slope is large, the buried depth is large, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F16/02
CPCE21F16/02
Inventor 胡新朋黄力洪开荣黎峰黄大为靳纪国郑清君王雅宜罗于恺李小莉文仁玉
Owner CHINA RAILWAY TUNNEL GROUP CO LTD
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