CN111350520B - Underground water drainage system and construction method for underground excavation tunnel of water-rich sandy pebble stratum - Google Patents
Underground water drainage system and construction method for underground excavation tunnel of water-rich sandy pebble stratum Download PDFInfo
- Publication number
- CN111350520B CN111350520B CN202010381650.0A CN202010381650A CN111350520B CN 111350520 B CN111350520 B CN 111350520B CN 202010381650 A CN202010381650 A CN 202010381650A CN 111350520 B CN111350520 B CN 111350520B
- Authority
- CN
- China
- Prior art keywords
- tunnel
- bin
- horizontal
- drainage ditch
- escape canal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 76
- 238000010276 construction Methods 0.000 title claims abstract description 20
- 238000009412 basement excavation Methods 0.000 title claims description 11
- 239000002689 soil Substances 0.000 claims abstract description 53
- 238000009825 accumulation Methods 0.000 claims abstract description 24
- 229910000831 Steel Inorganic materials 0.000 claims description 20
- 239000010959 steel Substances 0.000 claims description 20
- 239000003673 groundwater Substances 0.000 claims description 13
- 238000003466 welding Methods 0.000 claims description 6
- 239000000047 product Substances 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 4
- 238000005086 pumping Methods 0.000 claims description 4
- 238000004062 sedimentation Methods 0.000 claims description 4
- 239000004576 sand Substances 0.000 claims description 3
- 239000011265 semifinished product Substances 0.000 claims description 3
- 238000011900 installation process Methods 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims 3
- 239000002893 slag Substances 0.000 abstract description 8
- 238000000034 method Methods 0.000 description 7
- 238000000926 separation method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/14—Layout of tunnels or galleries; Constructional features of tunnels or galleries, not otherwise provided for, e.g. portals, day-light attenuation at tunnel openings
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D8/00—Shafts not provided for in groups E21D1/00 - E21D7/00
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F16/00—Drainage
- E21F16/02—Drainage of tunnels
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/16—Modification of mine passages or chambers for storage purposes, especially for liquids or gases
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The system comprises a vertical shaft structure, at least one positive line tunnel structure which is communicated with the shaft structure and is arranged in a horizontal way, wherein the vertical shaft structure comprises a vertical well 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 hardening layer, and the positive line tunnel structure comprises a tunnel primary support, a tunnel backfill layer, a tunnel hardening layer and a tunnel drainage ditch. According to the underground water drainage device, underground water in the tunnel is drained along drainage ditches on two sides of the tunnel and the transverse channel and finally collected into the vertical shaft water accumulation bin, and the underground water in the water accumulation bin and the soil storage bin are arranged separately, so that the problems that the construction road in the tunnel is muddy, the slag soil in the construction vertical shaft is mixed with the underground water and the environment pollution exists due to the traditional underground water drainage mode in the subway tunnel are solved.
Description
Technical Field
The invention relates to the field of underground water drainage, in particular to a drainage system for underground water of a water-rich sandy pebble stratum undercut tunnel and a construction method thereof.
Background
Underground water of the underground excavation tunnel is drained in a common mode that the underground water is collected into a construction vertical shaft along the bottom of the tunnel through a transverse passage, then is lifted to a ground sedimentation tank by a water pump from the vertical shaft, and finally is drained into a municipal pipe network. The method can cause ponding in tunnels and transverse channels and muddy construction channels, so that construction is inconvenient; meanwhile, the slag soil in the vertical shaft is mixed with the underground water, so that the underground water is poured to wash the side wall of the vertical shaft when the slag soil is transported vertically, a certain potential safety hazard exists, and the problem of environmental pollution caused by the outward transportation of the slag soil with water is solved.
Disclosure of Invention
The invention aims to provide a drainage system and a construction method for underground water of a water-rich sandy pebble stratum undercut tunnel, which aim to solve the technical problems that water accumulation and mud are accumulated in a construction channel in the tunnel and slag soil and underground water are mixed in a vertical shaft due to traditional drainage.
In order to achieve the above purpose, the invention adopts the following technical scheme:
The underground water drainage system of the water-rich sandy pebble stratum undercut tunnel comprises a vertical shaft structure, a horizontal channel structure communicated with the shaft structure and at least one positive line tunnel structure arranged in a crossing way with the horizontal channel structure,
The vertical shaft structure comprises a vertical shaft body, a soil storage bin and a water accumulation bin, wherein the soil storage bin is a bin barrel which is arranged at the rear half part of the bottom of the shaft body and is sealed at the bottom side and the periphery, and a reserved space at the front half part of the bottom of the shaft body is used as the water accumulation bin; the soil storage bin is not communicated with the water accumulation bin, the bottom elevation of the vertical shaft structure is lower than that of the transverse channel structure, the transverse channel structure is opposite to the soil storage bin, the length of the soil storage bin is greater than the width of the transverse channel structure,
The horizontal channel structure comprises a horizontal channel primary support, a horizontal channel drainage ditch, a horizontal channel backfill layer and a horizontal channel hardened layer, wherein the horizontal channel primary support is a supporting structure of a channel and comprises a bottom plate, a middle plate and a top plate, the horizontal channel drainage ditch is built on the upper side of the bottom plate, a water outlet of the horizontal channel drainage ditch is communicated into a well body, the water outlet is positioned at the front part of a soil storage bin and near the position of a water accumulation bin, the horizontal channel backfill layer is backfilled on the upper side of the bottom plate and between the horizontal channel drainage ditches, the upper side surface of the horizontal channel backfill layer is flush with the upper side surface of the horizontal channel drainage ditch, the upper side of the horizontal channel backfill layer is sprayed with the horizontal channel hardened layer, the position along the horizontal channel drainage ditch is covered with a drainage ditch steel cover plate,
The positive line tunnel structure comprises a tunnel primary support, a tunnel backfill layer, a tunnel hardening layer and a tunnel drainage ditch, wherein the tunnel backfill layer is filled at the bottom of the tunnel primary support in a through way, the tunnel hardening layer is sprayed on the upper side of the tunnel backfill layer, the upper side surface of the tunnel hardening layer is flush with the upper side surface of the transverse channel hardening layer, the tunnel hardening layer is arranged on the front side and the rear side of the transverse channel structure in a longitudinal interval section manner along the tunnel primary support in the tunnel range where excavation is completed by taking a tunnel face as a boundary, the tunnel drainage ditch is arranged on the two sides of the tunnel backfill layer and the tunnel hardening layer and is positioned in the tunnel primary support, the tunnel drainage ditch is arranged along with the tunnel hardening layer in a section manner, and the tunnel drainage ditch is communicated with the transverse channel drainage ditch.
The horizontal passageway escape canal is including first escape canal and the second escape canal of the both sides of the first branch of horizontal passageway of following, still including the third escape canal of horizontal setting, the structure of third escape canal is the same with the structure of first escape canal and second escape canal, the first escape canal is along the first longitudinal general length setting of the front side of horizontal passageway, and the delivery port of first escape canal communicates to the well internally, the second escape canal is along the first longitudinal setting of the rear side of horizontal passageway, and the length of second escape canal is less than the length of first escape canal, and the second escape canal is close to the tip of shaft structure and is communicated with first escape canal through third escape canal.
The soil storage bin comprises a bin body and vertical supports, the bin body is arranged at the bottom of the well body, the vertical supports are fixedly connected to the periphery of the bin body at intervals, the width of the bin body is matched with the size between the well bodies, the bin body is closely attached to the rear side of the well body, the vertical supports on the rear side, the left side and the right side of the bin body are respectively attached to the side wall of the well body, the gaps between the vertical supports and the side wall of the well body are filled with gravel, and the upper side surfaces of the bin body, the top side surfaces of the vertical supports and the upper side surfaces of the transverse channel backfill layers are all flush.
The horizontal internal support is arranged in the well body and in front of the bin body, the left end and the right end of the horizontal internal support are respectively and fixedly connected to the left side wall and the right side wall of the well body, and the setting height of the horizontal internal support is the same as the elevation of the top side surface of the bin body.
And a vertical drain pipe is arranged in the ponding bin.
The positive line tunnel structure is equipped with two altogether, is near well tunnel and far well tunnel respectively, and the tunnel escape canal in near well tunnel is located the one side that the well body was kept away from to the third escape canal.
The shape of two corner parts at the front side of the bin body is bevel.
The transverse channel backfill layer and the tunnel backfill layer are natural graded sand backfill layers, the transverse channel hardening layer and the tunnel hardening layer are concrete hardening layers, and the strength of the concrete hardening layers is consistent with that of the primary tunnel support.
The storehouse body encloses for the steel sheet and closes the welding and form the steel drum, vertical support is shaped steel, the level internal stay is steel support, horizontal passageway escape canal is bricked escape canal, tunnel escape canal is finished product escape canal.
A construction method of a water-rich sandy pebble stratum undercut tunnel underground water drainage system comprises the following construction steps:
Designing the size of a shaft body according to the vertical transportation capacity of a shaft structure, processing a soil storage bin into a finished product or a semi-finished product in advance according to the size of the shaft body, and welding vertical supports around the outer wall of the soil storage bin;
Step two, constructing a well body, lifting a soil storage bin to the rear half part of the bottom of the well body for installation, wherein in the process of installing the soil storage bin, in order to ensure that no underground water in the well body is pumped and discharged, vertical supports at the rear side, the left side and the right side of the well body are respectively clung to the side wall of the well body, and the gaps between the vertical supports and the side wall of the well body are filled with gravel; the front half part of the bottom of the well body is reserved to be used as a water accumulation bin; after the soil storage bin is installed, groundwater pumping is reduced in the water accumulation bin, and the groundwater is ensured not to enter the soil storage bin;
Step three: constructing a primary support of a transverse channel, constructing the transverse channel drainage ditch firstly according to the height of the tunnel drainage ditch after the primary support is finished, and then constructing a backfill layer and a tunnel hardening layer of the tunnel, wherein the tunnel hardening layer is used as a temporary hardening channel;
Step four: excavating a tunnel on the right line, repeatedly excavating along with the working procedures of primary support of the tunnel and backfilling of the tunnel, compacting and compacting the backfilling of the tunnel, firstly, constructing a tunnel hardening layer on the front side and the rear side of a transverse channel structure, installing shaped tunnel drainage ditches on the two sides of the tunnel hardening layer, setting the specific size of the tunnel drainage ditches according to the actual drainage requirements, then setting a section of tunnel hardening layer and tunnel drainage ditches every 20m-30m along with the excavation work,
The tunnel drainage ditch longitudinally naturally slopes along the slope of the straight line tunnel, the tunnel drainage ditch transversely sets up 2% slope, the slope is to the both sides horizontal passageway drainage ditch, the tunnel drainage ditch is according to the longitudinal slope of tunnel, be provided with the retaining pit as sedimentation tank and interim emergent drainage station at horizontal passageway primary support interval.
Compared with the prior art, the invention has the following characteristics and beneficial effects:
According to the invention, underground water in the tunnel is sequentially drained along the tunnel drainage ditch and the transverse channel drainage ditch and finally is collected into the vertical shaft water accumulation bin, and the underground water in the water accumulation bin and the soil storage bin are separated, so that the separation of slag soil and water in the vertical shaft is ensured, the lifting and the transportation are convenient, meanwhile, the transverse channel temporary channel is opposite to the soil storage bin, the transverse channel drainage ditch is communicated with the vertical shaft, the underground water bypasses the soil storage bin at the rear side of the well body to flow into the water accumulation bin at the front side of the well body, and the drying of slag soil in the transportation process is ensured, so that the road is not easy to be polluted.
The invention can ensure that the construction vehicles in the tunnel safely and smoothly run, personnel normally walk, the operation field is safe and civilized, the construction reaches the standard, and the dry and wet separation of the excavated slag soil and the underground water is environment-friendly.
Drawings
The invention is described in further detail below with reference to the accompanying drawings.
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a side cross-sectional view of fig. 1.
Reference numerals: 1-well body, 2-soil storage bin, 21-bin body, 22-vertical support, 3-water accumulation bin, 4-horizontal channel primary support, 41-bottom plate, 42-middle plate, 43-top plate, 5-horizontal channel drainage ditch, 51-first drainage ditch, 52-second drainage ditch, 53-third drainage ditch, 6-horizontal channel backfill layer, 7-horizontal channel hardening layer, 8-drainage ditch steel cover plate, 9-tunnel primary support, 10-tunnel backfill layer, 11-tunnel hardening layer, 12-tunnel drainage ditch, 13-egg gravel, 14-horizontal internal support, 15-vertical drainage pipe, 16-near well tunnel, 17-far well tunnel and 18-hypotenuse.
Detailed Description
Referring to fig. 1 and 2, the underground water drainage system of the underground excavation tunnel of the water-rich sandy pebble stratum comprises a vertical shaft structure, a horizontal cross channel structure communicated with the shaft structure and two positive line tunnel structures which are arranged in a crossing mode with the cross channel structure.
The vertical shaft structure comprises a vertical shaft body 1, a soil storage bin 2 and a water accumulation bin 3, wherein the soil storage bin 2 is a bin barrel which is arranged at the rear half part of the bottom of the shaft body 1 and is closed at the bottom side and the periphery, and a reserved space at the front half part of the bottom of the shaft body 1 is used as the water accumulation bin 3; the soil storage bin 2 is not communicated with the water storage bin 3, the bottom elevation of the vertical shaft structure is lower than that of the transverse channel structure, the transverse channel structure is opposite to the soil storage bin 2, and the length of the soil storage bin 2 is greater than the width of the transverse channel structure.
The soil storage bin 2 comprises a bin body 21 and vertical supports 22, the bin body 21 is arranged at the bottom of the well body 1, the vertical supports 22 are fixedly connected to the periphery of the bin body 21 at intervals, the width of the bin body 21 is matched with the size of the well body 1, the bin body 21 is closely attached to the rear side of the well body 1, the vertical supports 22 on the left side and the right side of the bin body 21 are closely attached to the side wall of the well body 1 respectively, gaps between the vertical supports 22 and the side wall of the well body 1 are filled with gravel 13, and the upper side surfaces of the bin body 21, the top side surfaces of the vertical supports 22 and the upper side surfaces of the transverse channel backfill layer 6 are all flush.
The horizontal internal support 14 is arranged in the well body 1 and in front of the bin body 21, the left end and the right end of the horizontal internal support 14 are respectively and fixedly connected to the left side wall and the right side wall of the well body 1, and the setting height of the horizontal internal support 14 is the same as the elevation of the top side surface of the bin body 21.
A vertical drain pipe 15 is arranged in the ponding bin 3.
The horizontal channel structure includes horizontal channel preliminary bracing 4, horizontal channel escape canal 5, horizontal channel backfill layer 6 and horizontal channel stiffening layer 7, horizontal channel preliminary bracing 4 is the supporting construction of passageway, including bottom plate 41, medium plate 42 and roof 43, horizontal channel escape canal 5 builds in the upside of bottom plate 41, and the delivery port of horizontal channel escape canal 5 communicates to the well body 1, and the delivery port is located the front portion of depositing the soil bin 2, is close to the position of ponding storehouse 3, horizontal channel backfill layer 6 backfills between the upside of bottom plate 41, horizontal channel escape canal 5, and the upside surface of horizontal channel backfill layer 6 horizontal channel escape canal 5's upside surface parallel and level, horizontal channel stiffening layer 7 is sprayed to the upside of horizontal channel backfill layer 6, and on the horizontal channel stiffening layer 7, the position along horizontal channel escape canal 5 is covered with escape canal steel apron 8.
The positive line tunnel structure comprises a tunnel primary support 9, a tunnel backfill layer 10, a tunnel hardening layer 11 and a tunnel drainage ditch 12, wherein the tunnel backfill layer 10 is filled in the bottom of the tunnel primary support 9 in a through mode, the tunnel hardening layer 11 is sprayed on the upper side of the tunnel backfill layer 10, the upper side surface of the tunnel hardening layer 11 is flush with the upper side surface of the transverse channel hardening layer 7, the tunnel hardening layer 11 is arranged on the front side and the rear side of the transverse channel structure in the tunnel range of which excavation is completed along the longitudinal interval of the tunnel primary support 9 by taking a tunnel face as a boundary, the tunnel drainage ditch 12 is arranged on the two sides of the tunnel backfill layer 10 and the tunnel hardening layer 11 and is positioned in the tunnel primary support 9, the tunnel drainage ditch 12 is arranged along with the tunnel hardening layer 11 in a section mode, and the tunnel drainage ditch 12 is communicated with the transverse channel drainage ditch 5.
The horizontal passageway escape canal 5 includes along the first escape canal 51 and the second escape canal 52 of the vertical both sides that set up in horizontal passageway preliminary support 4 of horizontal passageway preliminary support 4, still includes the third escape canal 53 of horizontal setting, and the structure of third escape canal 53 is the same with the structure of first escape canal 51 and second escape canal 52, first escape canal 51 is along the vertical logical length setting of horizontal passageway preliminary support 4 front side, in the delivery port intercommunication of first escape canal 51 is to the well body 1, the second escape canal 52 is along the vertical setting of horizontal passageway preliminary support 4 rear side, and the length of second escape canal 52 is less than the length of first escape canal 51, and the second escape canal 52 is close to the tip of shaft structure and is communicated with first escape canal 51 through third escape canal 53.
In this embodiment, the positive tunnel structure is provided with two paths, namely a near tunnel 16 and a far tunnel 17, and the tunnel drainage ditch 12 of the near tunnel 16 is located at one side of the third drainage ditch away from the well body 1.
In this embodiment, the two corners at the front side of the bin 21 are beveled edges 18, which is convenient for the falling installation of the bin.
In this embodiment, the transverse channel backfill layer 6 and the tunnel backfill layer 10 are natural graded sand backfill layers, and the transverse channel hardened layer 7 and the tunnel hardened layer 11 are concrete hardened layers, and the strength of the concrete hardened layers is consistent with that of the tunnel primary support 9.
In this embodiment, the bin body 21 is a steel drum formed by steel plate enclosing welding, the vertical support 22 is a section steel, the horizontal internal support is a steel support, the transverse channel drainage ditch 5 is a bricked drainage ditch, and the tunnel drainage ditch 12 is a finished drainage ditch.
In the embodiment, the horizontal internal support is an I28b steel support, the vertical support is 100mm multiplied by 6mm square steel, the bin body is made of a 20mm thick steel plate, the size of the steel cover plate of the drainage ditch is 1100mm multiplied by 500mm multiplied by 20mm, and the concrete of the hardening layer is 200mm thick C20 concrete.
The construction method of the underground water drainage system of the underground excavation tunnel of the water-rich sandy pebble stratum comprises the following construction steps:
Step one, designing the size of a well body 1 according to the vertical transportation capacity of a vertical shaft structure, processing the soil storage bin 2 into a finished product or a semi-finished product in advance according to the size of the well body 1, and welding vertical supports 22 around the outer wall of the soil storage bin 2.
Step two, constructing the well body 1, lifting the soil storage bin 2 to the rear half part of the bottom of the well body 1 for installation, wherein in the installation process of the soil storage bin 2, in order to ensure that no underground water in the well body 1 is pumped and discharged, vertical supports 22 on the rear side, the left side and the right side of the bin body 21 are respectively clung to the side wall of the well body 1, and in order to prevent the bin body from floating upwards and filling gravel in a gap between the two; the front half of the bottom of the well body 1 is reserved as a water accumulation bin 3; after the soil storage bin 2 is installed, the pumping and draining of the groundwater in the water accumulation bin 3 are reduced, and the groundwater is ensured not to enter the soil storage bin 2.
Step three: and constructing a transverse channel primary support 4, constructing a transverse channel drainage ditch 5 according to the height of a tunnel drainage ditch 12 after the construction is completed, and then constructing a tunnel backfill layer 10 and a tunnel hardening layer 11, wherein the tunnel hardening layer 11 serves as a temporary hardening channel.
Step four: excavating a main tunnel, repeatedly excavating along with the working procedures of constructing a tunnel primary support 9 and a tunnel backfill layer 10 along with the working procedures of the working face, compacting and compacting the tunnel backfill layer, firstly constructing a tunnel hardening layer 11 on the front side and the rear side of a transverse channel structure, installing shaped tunnel drainage ditches 12 on the two sides of the tunnel hardening layer 11, setting the specific size of the tunnel drainage ditches 12 according to the actual drainage amount requirement, then setting a section of the tunnel hardening layer 11 and the tunnel drainage ditches 12 every 20m-30m along with the working procedure of excavating,
The tunnel drainage ditch 12 naturally slopes along the positive line tunnel slope, the tunnel drainage ditch 12 transversely sets up 2% slope, the slope is to both sides horizontal passageway drainage ditch 5, tunnel drainage ditch 12 is provided with the long-pending sump as sedimentation tank and interim emergent drainage station at horizontal passageway primary support 4 interval according to the tunnel longitudinal slope.
Claims (8)
1. The utility model provides a rich water sandy pebble stratum undercut tunnel groundwater drainage system which characterized in that: comprises a vertical shaft structure, a horizontal channel structure communicated with the shaft structure and at least one positive line tunnel structure arranged crosswise with the horizontal channel structure,
The vertical shaft structure comprises a vertical shaft body (1), a soil storage bin (2) and a water accumulation bin (3), wherein the soil storage bin (2) is a bin barrel which is arranged at the rear half part of the bottom of the shaft body (1) and is sealed at the bottom side and the periphery, and a reserved space at the front half part of the bottom of the shaft body (1) is used as the water accumulation bin (3); the soil storage bin (2) is not communicated with the water accumulation bin (3), the bottom elevation of the vertical shaft structure is lower than that of the transverse channel structure, the transverse channel structure is opposite to the soil storage bin (2), the length of the soil storage bin (2) is larger than the width of the transverse channel structure,
The horizontal channel structure comprises a horizontal channel primary support (4), a horizontal channel drainage ditch (5), a horizontal channel backfill layer (6) and a horizontal channel hardened layer (7), the horizontal channel primary support (4) is a supporting structure of a channel and comprises a bottom plate (41), a middle plate (42) and a top plate (43), the horizontal channel drainage ditch (5) is built on the upper side of the bottom plate (41), a water outlet of the horizontal channel drainage ditch (5) is communicated into a well body (1), the water outlet is positioned at the front part of a soil storage bin (2) and near the position of a water accumulation bin (3), the horizontal channel backfill layer (6) is backfilled between the upper side of the bottom plate (41) and the horizontal channel drainage ditch (5), the upper side surface of the horizontal channel backfill layer (6) is flush with the upper side surface of the horizontal channel drainage ditch (5), the upper side of the horizontal channel backfill layer (6) is sprayed with the horizontal channel hardened layer (7), the position of the horizontal channel drainage ditch (5) is covered with a drainage ditch steel cover plate (8),
The positive line tunnel structure comprises a tunnel primary support (9), a tunnel backfill layer (10), a tunnel hardening layer (11) and a tunnel drainage ditch (12), wherein the tunnel backfill layer (10) is filled at the bottom of the tunnel primary support (9) in a through-length manner, the tunnel hardening layer (11) is sprayed on the upper side of the tunnel backfill layer (10), the upper side surface of the tunnel hardening layer (11) is flush with the upper side surface of the transverse channel hardening layer (7), the tunnel hardening layer (11) is arranged on the front side and the rear side of the transverse channel structure at intervals in the longitudinal direction of the tunnel primary support (9) in the tunnel range of which excavation is completed by taking a tunnel face as a boundary, the tunnel drainage ditch (12) is arranged on the two sides of the tunnel backfill layer (10) and the tunnel hardening layer (11) and is positioned in the tunnel primary support (9), the tunnel drainage ditch (12) is also arranged in sections along with the tunnel hardening layer (11), and the tunnel drainage ditch (12) is communicated with the transverse channel drainage ditch (5);
The positive line tunnel structure is provided with two paths, namely a near well tunnel (16) and a far well tunnel (17), and a tunnel drainage ditch (12) of the near well tunnel (16) is positioned at one side of the third drainage ditch far away from the well body (1);
The transverse channel backfill layer (6) and the tunnel backfill layer (10) are natural graded sand backfill layers, the transverse channel hardened layer (7) and the tunnel hardened layer (11) are concrete hardened layers, and the strength of the concrete hardened layers is consistent with that of the tunnel primary support (9).
2. The water-rich sandy pebble formation undercut tunnel groundwater evacuation system of claim 1, wherein: the horizontal passageway escape canal (5) is including first escape canal (51) and second escape canal (52) of the both sides of the preliminary branch of horizontal passageway (4) of horizontal passageway that follow is vertical to be set up, still includes the third escape canal (53) of horizontal setting, and the structure of third escape canal (53) is the same with the structure of first escape canal (51) and second escape canal (52), the longitudinal logical long setting of the anterior side of the preliminary branch of horizontal passageway (4) is followed in first escape canal (51), the delivery port intercommunication of first escape canal (51) is to well body (1), the longitudinal setting of the posterior side of the preliminary branch of horizontal passageway (4) is followed in second escape canal (52), and the length of second escape canal (52) is less than the length of first escape canal (51), and the tip that second escape canal (52) is close to the shaft structure is through third escape canal (53) and first escape canal (51) intercommunication.
3. The water-rich sandy pebble formation undercut tunnel groundwater evacuation system of claim 1, wherein: the soil storage bin (2) comprises a bin body (21) and vertical supports (22), the bin body (21) is arranged at the bottom of the well body (1), the vertical supports (22) are fixedly connected to the periphery of the bin body (21) at intervals, the width of the bin body (21) is matched with the size of the well body (1), the bin body (21) is tightly abutted to the rear side of the well body (1), the vertical supports (22) on the left side and the right side of the bin body (21) are tightly attached to the side walls of the well body (1) respectively, gaps between the two are filled with gravel (13), and the upper side surfaces of the bin body (21), the top side surfaces of the vertical supports (22) and the upper side surfaces of the transverse channel backfill layer (6) are all flush.
4. A water-rich sandy pebble bed undercut tunnel groundwater evacuation system as claimed in claim 3, wherein: the horizontal internal support (14) is arranged in the well body (1) and in front of the bin body (21), the left end and the right end of the horizontal internal support (14) are respectively and fixedly connected to the left side wall and the right side wall of the well body (1), and the setting height of the horizontal internal support (14) is the same as the elevation of the top side surface of the bin body (21).
5. A water-rich sandy pebble bed undercut tunnel groundwater evacuation system as claimed in claim 3, wherein: a vertical drain pipe (15) is arranged in the ponding bin (3).
6. A water-rich sandy pebble bed undercut tunnel groundwater evacuation system as claimed in claim 3, wherein: the shape of two corner parts at the front side of the bin body (21) is a bevel edge (18).
7. The water-rich sandy pebble formation undercut tunnel groundwater evacuation system of claim 4, wherein: the bin body (21) encloses for the steel sheet and closes the welding and form the steel drum, vertical support (22) are shaped steel, the support is the steel support in the level, horizontal passageway escape canal (5) are bricked escape canal, tunnel escape canal (12) are finished product escape canal.
8. A construction method of the underground water drainage system of the underground excavation tunnel of the water-rich sandy pebble stratum according to any one of claims 1 to 7, which is characterized by comprising the following construction steps:
Firstly, designing the size of a well body (1) according to the vertical transportation capacity of a vertical shaft structure, processing a soil storage bin (2) into a finished product or a semi-finished product in advance according to the size of the well body (1), and welding vertical supports (22) around the outer wall of the soil storage bin (2);
Step two, constructing a well body (1), lifting a soil storage bin (2) to the rear half part of the bottom of the well body (1) for installation, wherein in the installation process of the soil storage bin (2), in order to ensure that no underground water is in the well body (1) for pumping and draining underground water, vertical supports (22) at the rear side, the left side and the right side of a bin body (21) are respectively clung to the side wall of the well body (1), and the gaps between the vertical supports and the side wall of the well body are filled with gravel; a reserved space at the front half part of the bottom of the well body (1) is used as a water accumulation bin (3); after the soil storage bin (2) is installed, groundwater pumping is reduced in the water accumulation bin (3), and the groundwater is ensured not to enter the soil storage bin (2);
Step three: constructing a primary support (4) of a transverse channel, firstly constructing a transverse channel drainage ditch (5) according to the height of a tunnel drainage ditch (12) after the primary support is constructed, and then constructing a tunnel backfill layer (10) and a tunnel hardening layer (11), wherein the tunnel hardening layer (11) is used as a temporary hardening channel;
Step four: excavating a main tunnel, repeatedly excavating along with a working face, constructing a primary tunnel support (9) and a backfill layer (10) of the tunnel, compacting and compacting the backfill layer of the tunnel, firstly constructing a hardening layer (11) of the tunnel on the front side and the rear side of a transverse channel structure, installing shaped tunnel drainage ditches (12) on the two sides of the hardening layer (11) of the tunnel, setting the specific size of the tunnel drainage ditches (12) according to the actual drainage amount requirement, then setting a section of the hardening layer (11) of the tunnel and the tunnel drainage ditches (12) every 20m-30m along with the progress of excavation,
The tunnel drainage ditch (12) naturally slopes along the positive line tunnel slope, the tunnel drainage ditch (12) transversely sets up 2% slope, the slope is to both sides horizontal passageway drainage ditch (5), tunnel drainage ditch (12) is according to the tunnel longitudinal slope, be provided with the retaining pit as sedimentation tank and interim emergent drainage station at horizontal passageway primary support (4) interval.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010381650.0A CN111350520B (en) | 2020-05-08 | 2020-05-08 | Underground water drainage system and construction method for underground excavation tunnel of water-rich sandy pebble stratum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010381650.0A CN111350520B (en) | 2020-05-08 | 2020-05-08 | Underground water drainage system and construction method for underground excavation tunnel of water-rich sandy pebble stratum |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111350520A CN111350520A (en) | 2020-06-30 |
| CN111350520B true CN111350520B (en) | 2024-06-04 |
Family
ID=71193546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010381650.0A Active CN111350520B (en) | 2020-05-08 | 2020-05-08 | Underground water drainage system and construction method for underground excavation tunnel of water-rich sandy pebble stratum |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111350520B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113108127A (en) * | 2021-04-29 | 2021-07-13 | 北京市政建设集团有限责任公司 | Pipe manufacturing process applied to sewage pipeline transformation |
| CN114109494B (en) * | 2021-11-29 | 2024-01-16 | 中铁第一勘察设计院集团有限公司 | Implementation method of two-single-extra-long tunnel partition drainage system in expanded rock area |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020028023A (en) * | 2000-10-06 | 2002-04-15 | 엄기형 | Drainage construction method for concrete bottom of the underground floor |
| KR100820572B1 (en) * | 2007-01-03 | 2008-04-07 | 박옥교 | Constructing method of drainage structure by using water way with a gap |
| KR20090021042A (en) * | 2007-08-24 | 2009-02-27 | 허한구 | Excavation-tunnel type construction method of open tunnel-part |
| CN106761918A (en) * | 2016-12-30 | 2017-05-31 | 中铁二院工程集团有限责任公司 | A kind of tunnel solution cavity and Groundwater Comprehensive administer construction and construction method |
| CN107218080A (en) * | 2017-06-28 | 2017-09-29 | 中建市政工程有限公司 | Underground water multi-stage filtering and draining system for deep and long-distance water-rich tunnel and construction method |
| CN107227961A (en) * | 2017-06-29 | 2017-10-03 | 中铁十二局集团有限公司 | Heavy caliber dewatering well construction method in metro built by mining method hole |
| CN110685710A (en) * | 2019-11-01 | 2020-01-14 | 中建八局轨道交通建设有限公司 | Secondary lining construction method and system for intersection of main tunnel and double-layer construction transverse channel |
| CN110685741A (en) * | 2019-10-25 | 2020-01-14 | 中建八局轨道交通建设有限公司 | Catchment channel for treating water leakage after primary support back of underground excavation shaft and construction method thereof |
| CN212105884U (en) * | 2020-05-08 | 2020-12-08 | 北京建工土木工程有限公司 | Underground water dredging and draining system for water-rich sandy gravel stratum underground excavated tunnel |
-
2020
- 2020-05-08 CN CN202010381650.0A patent/CN111350520B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020028023A (en) * | 2000-10-06 | 2002-04-15 | 엄기형 | Drainage construction method for concrete bottom of the underground floor |
| KR100820572B1 (en) * | 2007-01-03 | 2008-04-07 | 박옥교 | Constructing method of drainage structure by using water way with a gap |
| KR20090021042A (en) * | 2007-08-24 | 2009-02-27 | 허한구 | Excavation-tunnel type construction method of open tunnel-part |
| CN106761918A (en) * | 2016-12-30 | 2017-05-31 | 中铁二院工程集团有限责任公司 | A kind of tunnel solution cavity and Groundwater Comprehensive administer construction and construction method |
| CN107218080A (en) * | 2017-06-28 | 2017-09-29 | 中建市政工程有限公司 | Underground water multi-stage filtering and draining system for deep and long-distance water-rich tunnel and construction method |
| CN107227961A (en) * | 2017-06-29 | 2017-10-03 | 中铁十二局集团有限公司 | Heavy caliber dewatering well construction method in metro built by mining method hole |
| CN110685741A (en) * | 2019-10-25 | 2020-01-14 | 中建八局轨道交通建设有限公司 | Catchment channel for treating water leakage after primary support back of underground excavation shaft and construction method thereof |
| CN110685710A (en) * | 2019-11-01 | 2020-01-14 | 中建八局轨道交通建设有限公司 | Secondary lining construction method and system for intersection of main tunnel and double-layer construction transverse channel |
| CN212105884U (en) * | 2020-05-08 | 2020-12-08 | 北京建工土木工程有限公司 | Underground water dredging and draining system for water-rich sandy gravel stratum underground excavated tunnel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111350520A (en) | 2020-06-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2020286274B2 (en) | Aquifer connection method for inner dump in open-pit mine | |
| CN111350520B (en) | Underground water drainage system and construction method for underground excavation tunnel of water-rich sandy pebble stratum | |
| CN103953008A (en) | Modified mixed dam applicable to tailings ponds | |
| CN113789758B (en) | Tailing reservoir bag dam-piling grid piling structure and grid piling method | |
| CN212477607U (en) | Shallow underground excavation tunnel top riverbed bottom reinforced structure that buries | |
| CN113605492A (en) | Three-dimensional protection and utilization method for strip mine water resources | |
| CN111648383A (en) | Internal drainage method for loess high-fill side slope | |
| CN114351728A (en) | Solidified soil stirring field and construction method for backfilling solidified soil in narrow high backfilling area | |
| CN213038379U (en) | Open cut tunnel foundation pit backfilling structure | |
| CN212105884U (en) | Underground water dredging and draining system for water-rich sandy gravel stratum underground excavated tunnel | |
| CN114855762B (en) | Device and method for closing and sealing tailings pond | |
| WO2016155657A1 (en) | Movable cofferdam open-cutting method | |
| CN114032910B (en) | Narrow foundation pit ramp structure and soil discharging method using same | |
| CN110185051A (en) | Deep narrow excavation water discharge method | |
| CN217399609U (en) | Device for closing and sealing tailing pond | |
| CN209816896U (en) | Collapsible loess area utility tunnel foundation structure | |
| CN111794183A (en) | Shallow-buried underground tunnel top riverbed bottom reinforcing structure and method | |
| CN209277088U (en) | Square tube column water-break well and assembling type steel structure water-break system | |
| CN206800351U (en) | A kind of Tailings Dam drains off floodwaters culvert | |
| CN111535293A (en) | Method and system for reinforcing deep soft foundation by combining low-level water-lowering vacuum with surcharge preloading | |
| CN214786425U (en) | Draining and soil collecting pit | |
| RU2392377C1 (en) | Method for erection of sludge pond tier build-up dam | |
| CN219196224U (en) | Dam downstream infiltration recovery facility | |
| CN220868277U (en) | Earth-rock dam preloading structure suitable for sand gravel foundation | |
| CN216406901U (en) | Be used for outer side slope crack water collection device of arranging of open pit tailings cemented backfill |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |