Water-rich sandy gravel stratum bored tunnel underground water drainage system and construction method thereof
A technology of sand, gravel and groundwater, applied in tunnels, drainage, safety devices, etc., can solve the problems of mixing, water accumulation in construction channels, mud and other problems, and achieve the effect of ensuring dryness, safe and smooth driving, and not easy to pollute the road.
Pending Publication Date: 2020-06-30
BCEG CIVIL ENG
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Problems solved by technology
[0003] The purpose of the present invention is to provide a groundwater drainage system and its construction method for tunnels excavated in water-rich sand and pebble strata, to solve the technical problems of water accumulation and muddy construction passages in tunnels caused by traditional drainage, and the mixing of muck and groundwater in shafts
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[0030] For this example see figure 1 and figure 2 As shown, a groundwater drainage system for underground tunnels in water-rich sand and pebble formations includes a vertical shaft structure, a horizontal cross-channel structure connected to the shaft structure, and two main-line tunnel structures intersecting with the cross-channel structure.
[0031] The shaft structure includes a vertical well body 1, a soil storage bin 2 and a water storage bin 3. The soil storage bin 2 is a storage tank arranged at the bottom rear half of the well body 1 and closed on the bottom side and surroundings. The front half of the bottom of the body 1 reserves a space as the water storage bin 3; the soil storage bin 2 is not connected to the water storage bin 3, and the bottom elevation of the shaft structure is lower than the horizontal channel structure, and the horizontal channel structure is facing the soil storage bin 2. The length of the soil storage bin 2 is greater than the width of the...
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The invention relates to a water-rich sandy gravel stratum bored tunnel underground water drainage system and a construction method thereof. The system comprises a vertical shaft structure, a horizontal transverse channel structure communicated with the vertical shaft structure and at least one main line tunnel structure intersecting with the transverse channel structure, wherein the vertical shaft structure comprises a vertical shaft body, a soil storage bin and a water accumulation bin; the transverse channel structure comprises a transverse channel primary support, a transverse channel drainage ditch, a transverse channel backfill layer and a transverse channel hardened layer; the main line tunnel structure comprises a tunnel primary support, a tunnel backfill layer, a tunnel hardened layer and a tunnel drainage ditch. Underground water in the tunnel is drained along drainage ditches on the two sides of the tunnel and the transverse channel and finally converged into the vertical shaft water accumulation bin, the underground water in the water accumulation bin and the soil storage bin are arranged in a separated mode, the problems that a construction road in the tunnel is muddyand muck and underground water in a construction vertical shaft are mixed due to a traditional underground water draining mode in a subway tunnel, and the environmental pollution is existent are solved.
Description
technical field [0001] The invention relates to the field of underground water drainage, in particular to an underground water drainage system and a construction method for tunnels excavated in water-rich sand and pebble strata. Background technique [0002] The usual way of drainage of underground water in subway underground tunnels is to drain along the bottom of the tunnel, pass through the horizontal channel, and collect it into the construction shaft, then use the water pump to lift it from the shaft to the ground sedimentation tank, and finally discharge it into the municipal pipe network. This method will cause water accumulation in the tunnel and cross passage and muddy construction passage, which will cause construction inconvenience; at the same time, the muck in the shaft will mix with groundwater, causing the groundwater to pour and wash the side wall of the shaft when the muck is transported vertically, which has certain safety hazards and brings The transportat...
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IPC IPC(8): E21D9/14E21D8/00E21F16/02E21F17/16
CPCE21D9/14E21D8/00E21F16/02E21F17/16
Inventor 张开坤赵国祝潇洁
Owner BCEG CIVIL ENG