CN210195753U - Tunnel blasting excavation system - Google Patents
Tunnel blasting excavation system Download PDFInfo
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- CN210195753U CN210195753U CN201921259903.6U CN201921259903U CN210195753U CN 210195753 U CN210195753 U CN 210195753U CN 201921259903 U CN201921259903 U CN 201921259903U CN 210195753 U CN210195753 U CN 210195753U
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Abstract
The utility model relates to the technical field of tunnel engineering, in particular to a tunnel blasting excavation system; the adopted technical scheme is as follows: a tunnel blasting excavation system comprises a water overflow hole and water drain pipe mounting holes, wherein the water drain pipe mounting holes and the water overflow hole are sequentially arranged from a tunnel face to the inside along the tunneling direction of a tunnel, and a first water drain pipe is suitably arranged in each water drain pipe mounting hole; an anti-seepage layer is filled between the outer wall of the first drainage pipe and the inner wall of the drainage pipe mounting hole, the first drainage pipe can slide along the axial direction, the first drainage pipe is communicated with the overflow hole, and the first drainage pipe is used for draining water flowing out of the overflow hole; the tunnel is provided with a second drain pipe and a third drain pipe, the second drain pipe and the third drain pipe are sequentially arranged towards the tunnel opening, one end of the second drain pipe is detachably connected with the first drain pipe, and one end of the second drain pipe is connected with the third drain pipe through a corrugated pipe. The utility model has the characteristics of the efficiency of construction is high, safe.
Description
Technical Field
The utility model relates to a tunnel engineering technical field, concretely relates to tunnel blasting excavation system.
Background
For the tunnel with higher rock strength, if the tunneling machine is adopted to excavate the tunnel, the construction efficiency is low, the equipment cost is high, the mechanical abrasion is large, the influence of the construction environment is large, and the adaptability is poor. The drilling blasting has good adaptability to geological conditions, low construction cost and relatively mature technology, so that the drilling blasting construction is generally adopted for tunnels with high rock strength at present. Due to various factors such as rock origin and crustal movement, the rock mass is subjected to multiple bedding and cracks, and the southwest area is a place with abundant water resources and rainwater, so that the rock is rich in underground water. Therefore, when the tunnel is excavated, the normal construction of the tunnel is easily affected due to water leakage and water inrush, and the tunnel collapse accident is caused in serious cases.
The waterproof reinforcing method adopted at present is a grouting method: and selecting a proper grouting material according to the requirement, and injecting the grouting material through the grouting holes at a certain grouting pressure so as to play the roles of preventing water and reinforcing surrounding rocks. The grouting method cannot ensure the grouting effect due to the influence of the multiple bedding of surrounding rocks and the properties of fractured rocks, and the problems of repeated water seepage and the like easily occur due to the high randomness of the fracture distribution of the rock mass. In addition, during the process of drilling and pore-forming of the blast hole, underground water easily invades into the blast hole, so that accumulated water in the blast hole is difficult to clean, the blasting effect and the blasting quality are influenced, and great potential safety hazards exist. And when blasting, the vibrations that produce will lead to the rock mass crack to increase, will destroy the waterproof effect of slip casting, very easily causes groundwater burst.
SUMMERY OF THE UTILITY MODEL
Aiming at the technical problem that the construction is influenced by the underground water in the existing tunnel blasting excavation; the utility model provides a tunnel blasting excavation system can effectively get rid of the groundwater in the tunnel rock mass, ensures tunnel construction's normal clear and construction safety, has the characteristics of the efficiency of construction height, safety.
The utility model discloses a following technical scheme realizes:
a tunnel blasting excavation system comprises a water overflow hole and water drain pipe mounting holes, wherein the water drain pipe mounting holes and the water overflow hole are sequentially arranged from a tunnel face to the inside along the tunneling direction of a tunnel, and a first water drain pipe is suitably arranged in each water drain pipe mounting hole; an anti-seepage layer is filled between the outer wall of the first drainage pipe and the inner wall of the drainage pipe mounting hole, the first drainage pipe can slide along the axial direction of the first drainage pipe, the first drainage pipe is communicated with the overflow hole, and the first drainage pipe is used for draining water flowing out of the overflow hole; be equipped with second drain pipe, third drain pipe in the tunnel, second drain pipe, third drain pipe are arranged towards the tunnel entrance to a cave by the palm in proper order, second drain pipe one end can be dismantled with first drain pipe and be connected, the second drain pipe other end passes through the bellows and links to each other with the third drain pipe.
The utility model discloses an excavate drain pipe mounting hole, spillway hole in proper order at the tunnel face, set up first drain pipe at the drain pipe mounting hole, first drain pipe front end is connected with second drain pipe, bellows, third drain pipe. Therefore, underground water in the rock body is discharged out of the tunnel in advance, and the safety of tunnel blasting construction is ensured; the influence on the construction caused by the seepage of underground water can be reduced, and the construction efficiency of the tunnel is high. And the seepage-proof layer in the drain pipe mounting hole can prevent underground water from seeping out of rock mass of the tunnel face, so that the safety of the tunnel is ensured. Meanwhile, the first drainage pipe can be taken out from the drainage pipe mounting hole, so that the first drainage pipe can be recycled; and first drain pipe and second drain pipe can be dismantled the connection, second drain pipe and third drain pipe pass through bellows connection, can be quick fly out the scope of falling from the blasting rubble with the second drain pipe to protect the second drain pipe, and when needs drainage once more, can realize fast that the return of second drain pipe is discharged remaining groundwater.
Furthermore, a plug is adapted in the through hole of the anti-seepage layer, the plug is detachably connected with the anti-seepage layer, and the plug is used for plugging the through hole of the anti-seepage layer. The through hole of the anti-seepage layer is blocked by the plug, so that the blasting construction of the tunnel can be carried out when underground water is not completely removed, and the tunneling construction efficiency is further improved.
The specific implementation mode of the plug is as follows: the plug comprises a flexible sleeve, the outer diameter of the flexible sleeve is matched with the inner diameter of a through hole of the water seepage prevention layer, a threaded sleeve is embedded in one end of the flexible sleeve, and an expansion hole is formed in the other end of the flexible sleeve; the plug further comprises an expansion rod, the inner end of the expansion rod is a threaded section, the outer end of the expansion rod is a conical section, the outer side of the conical section inclines towards the threaded section, the threaded section is in threaded connection with a threaded sleeve, and the outer diameter of the small end of the conical section is larger than the inner diameter of the expansion hole. The inner wall of the through hole of the plug and the water seepage prevention layer is tightly attached, so that the influence on normal blasting caused by overflow of residual underground water can be avoided, and the plug can be conveniently installed and taken out.
Preferably, the outer end of the expansion rod is further fixed with a rotary disc, the outer diameter of the rotary disc is matched with the inner diameter of the through hole of the anti-seepage layer, so that rock debris is prevented from entering a gap between the expansion rod and the anti-seepage layer and being difficult to clean, and the plug can be taken out smoothly. The rotary disc is provided with a plurality of rotary holes, the axes of the rotary holes are parallel to the axis of the rotary disc, and the rotary holes are uniformly distributed along the circumference of the axis of the rotary disc so as to be convenient for rotating the expansion rod to quickly take out the plug.
Further, still include the big gun quilt, the big gun quilt is parallel with the tunnel face, and rubble splashes, noise reduction, reduces the raise dust when can effectively prevent to blast. The blasting quilt can be detachably connected with the side wall of the tunnel, can be detached after blasting is finished, and does not affect the transportation of rock slag.
Preferably, still be equipped with exhaust pipe, blast pipe in the tunnel, exhaust pipe, blast pipe all are connected with the fan, exhaust pipe inner, blast pipe inner all are located big gun quilt and face between to the tunnel between big gun quilt and the face is removed dust fast and is ventilated, and dust removal ventilation efficiency is high, energy-conservation.
Preferably, the tunnel top still is equipped with a plurality of water curtain pipes, the water curtain pipe is located the big gun by the outside, the water curtain union coupling has clean water pump. The water curtain is formed outside the gun quilt when blasting is carried out, and dust generated by blasting is prevented from diffusing in the tunnel between the gun quilt and the hole to increase the dust removal difficulty. The water curtain pipe is detachably connected with the top of the tunnel and can move along the tunneling direction along with tunneling of the tunnel, so that the distance between the water curtain and the tunnel face is ensured within a reasonable range.
Preferably, still include a plurality of sprinkler heads, the sprinkler head is connected with the water pump, the big gun is equipped with the sprinkler head mounting hole by the upper end, the sprinkler head mounting hole is used for installing the sprinkler head, can spray rock sediment and the dust that the blasting produced to further reduction raise dust. The inner of sprinkler bead mounting hole is equipped with the rubber separation blade, rubber separation blade one side with be afraid of big gun quilt fixed connection, the rubber separation blade is afraid of to paste at big gun quilt inboard under the relative one side natural state of big gun quilt fixed connection side with being afraid of to protect the sprinkler bead, prevent that the flying stone that the blasting produced from damaging or blockking up the sprinkler bead.
Preferably, the tunnel bottom is equipped with the sump pit, the sump pit is located the big gun by the outside to collect and get rid of sprinkler bead and water curtain pipe exhaust water, the transportation of the rock sediment of being convenient for.
Compared with the prior art, the utility model, following advantage and beneficial effect have:
1. a water drainage pipe mounting hole and an overflow hole are sequentially formed from the face of the palm to the inside, a water seepage prevention layer and a first water drainage pipe are arranged in the water drainage pipe mounting hole, and the first water drainage pipe can slide along the axial direction and is communicated with the overflow hole; and a second drain pipe and a third drain pipe are arranged in the tunnel, and the second drain pipe and the first drain pipe are detachably connected with the second drain pipe and are connected with the third drain pipe through a corrugated pipe. Underground water in the rock body can be discharged out of the tunnel in advance, and the safety of tunnel blasting construction is ensured; the influence on the construction caused by the seepage of underground water can be reduced, and the construction efficiency of the tunnel is high. The seepage-proof layer can prevent underground water from seeping out of rock mass of the tunnel face, and safety of the tunnel is ensured. In addition, the first drain pipe can be recycled from the drain pipe mounting hole. The first drainage pipe and the second drainage pipe are detachably connected, and the second drainage pipe and the third drainage pipe are connected through the corrugated pipe, so that the second drainage pipe can be quickly moved out of the blasting crushed stone falling range to protect the second drainage pipe; and when need be once more to the drainage, can realize fast that the return of second drain pipe is discharged remaining groundwater.
2. The end caps are matched with the through holes of the anti-seepage layer in a detachable mode, the through holes of the anti-seepage layer are blocked by the end caps, and blasting construction of the tunnel can be conducted when underground water is not completely removed, so that tunneling construction efficiency is further improved.
3. Be equipped with big gun quilt in the tunnel, big gun quilt is parallel with the tunnel face, and rubble splashes, noise reduction, reduces the raise dust when can effectively prevent the blasting. And the blasting quilt can be detachably connected with the side wall of the tunnel, and can be detached after blasting is finished, so that the transportation of rock slag is not influenced.
4. The dust-removing and ventilating device is further provided with an exhaust pipe and an air supply pipe, the exhaust pipe and the air supply pipe are connected with fans, the inner end of the exhaust pipe and the inner end of the air supply pipe are located between the gun quilt and the tunnel face to rapidly remove dust and ventilate a tunnel between the gun quilt and the tunnel face, and the tunnel space between the gun quilt and the tunnel face is small, so that the dust-removing and ventilating efficiency is high, and energy is saved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
fig. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view of portion A of FIG. 1;
FIG. 3 is a schematic view of a plug structure;
fig. 4 is a schematic view of a sprinkler head mounting hole structure.
Reference numbers and corresponding part names in the drawings:
1-overflow hole, 2-drain pipe installation hole, 3-tunnel, 4-first drain pipe, 5-impermeable layer, 6-second drain pipe, 7-third drain pipe, 8-corrugated pipe, 9-plug, 10-flexible sleeve, 11-threaded sleeve, 12-expansion hole, 13-expansion rod, 14-threaded section, 15-tapered section, 16-quilt, 17-exhaust pipe, 18-blast pipe, 19-water curtain pipe, 20-water spray head, 21-water spray head installation hole, 22-rubber catch, 23-water collecting pit, 24-rotating disc and 25-rotating hole.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.
Examples
The utility model provides a tunnel blasting excavation system, includes spillway hole 1, drain pipe mounting hole 2, drain pipe 2 mounting hole, spillway hole 1 are inwards arranged in proper order from the face along 3 tunnelling directions of tunnel. Specifically, the drain pipe installation hole 2 penetrates through the tunnel face, and the overflow hole 1 is located in the rock body behind the tunnel face, so that the groundwater in the rock body behind the tunnel face is guided into the advanced drain hole 1. The adaptation has first drain pipe 4 in the drain pipe mounting hole 2, it has prevention of seepage water layer 5 to fill between 4 outer walls of first drain pipe and the 2 inside walls of drain pipe mounting hole. The first drainage pipe 4 can slide along the axial direction of the first drainage pipe 4, namely, the first drainage pipe 4 is not bonded with the impermeable layer 5, and it should be understood that the middle part of the impermeable layer 5 is a through hole in an original shape matched with the first drainage pipe 4. The first drain pipe 4 communicates with the overflow hole 1, that is, the first drain pipe 4 serves to drain the water flowing out of the overflow hole 1. And a second drain pipe 6 and a third drain pipe 6 are arranged in the tunnel 3, and the second drain pipe 6 and the third drain pipe 7 are sequentially arranged from the palm to the tunnel portal. One end of the second water discharge pipe 6 is detachably connected with the first water discharge pipe 4, and the other end of the second water discharge pipe 6 is connected with the third water discharge pipe 7 through the corrugated pipe 8, so that water flowing out of the overflow hole 1 can be discharged to a designated position.
The utility model discloses an excavate drain pipe mounting hole 2, spillway hole 1 in proper order at 3 faces of tunnel to set up first drain pipe 4 at drain pipe mounting hole 2, and 4 front ends of first drain pipe are connected with second drain pipe 6, bellows 8, third drain pipe 7. Therefore, underground water in the rock body is discharged out of the tunnel 3 in advance, and the safety of tunnel blasting construction is ensured; the influence on the construction caused by the seepage of underground water can be reduced, and the construction efficiency of the tunnel is high. And the anti-seepage layer 5 in the drain pipe mounting hole 2 can prevent groundwater from seeping out of rock mass of the tunnel face, and ensure the safety of the tunnel. Meanwhile, the first drain pipe 4 can be taken out of the drain pipe mounting hole 2, so that the first drain pipe 4 can be recycled; and first drain pipe 4 and second drain pipe 6 can be dismantled the connection, second drain pipe 7 and third drain pipe 7 pass through bellows 8 and connect, can be quick fly out the scope of falling from the blasting rubble with second drain pipe 6 to protection second drain pipe 6, and when needs drainage once more, can realize second drain pipe 6's return fast and discharge remaining groundwater.
Furthermore, a plug 9 is adapted in the through hole of the anti-seepage layer 5, the plug 9 is detachably connected with the anti-seepage layer 9, and the plug 9 is used for plugging the through hole of the anti-seepage layer 5. It can be understood that when the impermeable layer 5 needs to be plugged, the plug 9 is plugged in the through hole of the impermeable layer 5, and when the first drain pipe 4 needs to be installed or residual water flow needs to be removed, the plug 9 is taken out. The through hole of the impermeable layer 5 is blocked by the plug 9, so that the blasting construction of the tunnel can be carried out when underground water is not completely removed, and the tunneling construction efficiency is further improved.
As a specific embodiment of the plug 9: the plug 9 comprises a flexible sleeve 10, the flexible sleeve 10 is generally made of rubber or flexible plastics such as soft PVC (polyvinyl chloride) and ethylene propylene diene monomer, and the outer diameter of the flexible sleeve 10 is matched with the inner diameter of the through hole of the anti-seepage layer 5. The embedded threaded sleeve 11 that is equipped with of flexible cover 10 one end, the flexible cover 10 other end is equipped with inflation hole 12, and in this embodiment, threaded sleeve 11 and flexible cover 10 integrated into one piece can ensure the life of flexible cover 10 and the remaining joint strength of threaded sleeve 11 of flexible cover 10. The plug 9 further comprises an expansion rod 13, the inner end of the expansion rod 13 is a threaded section 14, the outer end of the expansion rod 13 is a tapered section 15, and the outer side of the tapered section 15 inclines towards the threaded section 14. And the thread section 14 is in threaded connection with the thread sleeve 13, and the outer diameter of the small end of the conical section 15 is larger than the inner diameter of the expansion hole 12. It will be appreciated that the outer diameter of the flexible sheath 10 can be enlarged by screwing in the expansion rod 13 to tightly block in the impermeable layer 5; so as to ensure that the plug is tightly attached to the inner wall of the through hole of the anti-seepage layer and prevent the normal operation of blasting from being influenced by the overflow of residual underground water; and the expansion rod 13 is screwed out, so that the flexible sleeve 10 can be radially compressed, and the installation and the taking out of the plug 9 are facilitated.
Preferably, the outer end of the expansion rod 13 is further fixed with a rotary disc 24, and the outer diameter of the rotary disc 24 is matched with the inner diameter of the through hole of the impermeable layer 5, so that rock debris is prevented from entering a gap between the expansion rod 13 and the impermeable layer 5 and being difficult to clean, and the plug 9 can be taken out smoothly. The rotating disc 24 is provided with a plurality of rotating holes 25, the axes of the rotating holes 25 are parallel to the axis of the rotating disc shaft 24, and the rotating holes 25 are uniformly distributed along the circumference of the rotating disc shaft 24 so as to rotate the expansion rod 13 and quickly take out the plug 9.
Further, still include big gun by 16, big gun by 16 is parallel with 3 face of tunnel, and rubble splash, noise reduction, reduction raise dust when can effectively prevent to explode. The cannon quilt 16 is detachably connected with the side wall of the tunnel 3, and can be detached or stored after blasting is finished, so that the transportation of rock slag is not influenced.
Preferably, still be equipped with exhaust pipe 17, blast pipe 18 in the tunnel 3, exhaust pipe 17, blast pipe 18 all are connected with the fan. The inner end of the exhaust pipe 17 and the inner end of the blast pipe 18 are both positioned between the cannon quilt 16 and the tunnel face, and the tunnel 3 between the cannon quilt 16 and the tunnel face is rapidly dedusted and ventilated. Wherein, a relatively closed space can be formed in the construction area of the tunnel face of the tunnel 3 through the gun quilt 16, and the dust removal and ventilation efficiency and the energy saving are high for the relatively closed space.
Preferably, a plurality of water curtain pipes 19 are further arranged at the top of the tunnel 3, and the water curtain pipes 19 are located outside the cannon quilt 16. The water curtain pipe 16 is connected with a clean water pump, and the clean water pump is used for supplying water to the water curtain pipe 19 so as to form a water curtain outside the blasting quilt 16 when blasting is carried out, and dust generated by blasting is prevented from diffusing in the tunnel 3 between the blasting quilt 16 and the opening to increase the dust removal difficulty. The water curtain pipe 19 is detachably connected with the top of the tunnel 3 and can move along the tunneling direction along with tunneling of the tunnel, so that the distance between the water curtain 16 and the tunnel face is ensured to be within a reasonable range.
Preferably, the water sprayer further comprises a plurality of water spraying heads 20, and a water pump is connected to the water spraying heads 20 to supply water to the water spraying heads 20. The upper end of the cannon cover 16 is provided with a sprinkler head mounting hole 12, the sprinkler head mounting hole 21 is used for mounting a sprinkler head 20, and rock slag and dust generated by blasting can be sprayed, so that the flying dust is further reduced. The inner end of the sprinkler head mounting hole 21 is provided with a rubber baffle 22, one side of the rubber baffle 22 is fixedly connected with the fort-gunning quilt 16, and the side of the rubber baffle 22 opposite to the fixedly connected side of the fort-gunning quilt 16 is naturally attached to the inner side of the fort-gunning quilt 16. Specifically, when no water is supplied to the sprinkler head 20, the rubber stopper 23 blocks the outlet of the sprinkler head 20; when the sprinkler head 20 sprays water, the rubber baffle 22 is pushed away under the action of water pressure to spray, and the rubber baffle 22 has elasticity and can be recovered automatically. The quilt 16 is provided with a one-way valve plate to protect the sprinkler head 20 and prevent flying stones generated by blasting from damaging or blocking the sprinkler head.
Preferably, the bottom of the tunnel 3 is provided with a water collecting pit 23, and the water collecting pit 23 is positioned outside the quilt 16 to collect and discharge water discharged by the sprinkler head 20 and the water curtain pipe 19, so as to facilitate the transportation of rock slag.
The tunnel excavation construction method adopting the tunnel blasting excavation system comprises the following steps:
before the tunnel is excavated, the composition of rock mass, the content of underground water and the storage position of the underground water are detected;
after the tunnel is excavated and a tunnel with a certain length is formed, an exhaust pipe, an air supply pipe, a gun and quilt, a water curtain pipe and a water spray head are arranged in the tunnel;
blocking the tunnel through the gun quilt, enabling the end heads of the exhaust pipe and the blast pipe to be located at the inner side of the gun quilt, enabling the water curtain pipe to be located at the inner side of the gun quilt, and digging a water accumulation pit at the bottom of the tunnel at the outer side of the gun quilt;
starting a fan connected with the exhaust pipe and the blast pipe to remove dust and ventilate the space between the gun quilt and the tunnel face;
carrying out drilling blasting slag conveying construction: installing construction requirements on the tunnel face, drilling blast holes, charging, carrying out blasting construction, feeding clear water to a water spray head after blasting, then collecting a blast blanket, and cutting off a water source of a water curtain pipe to carry out slag conveying;
after the rock slag and stones are removed, repeating the drilling, blasting and slag conveying construction;
when the tunnel is tunneled to the front end of the underground water burying position, the tunneling is suspended, and a drainage mounting hole is formed in the tunnel face of the tunnel;
installing a first drainage pipe in the drainage pipe installation hole, injecting anti-seepage cement mortar into a gap between the first drainage pipe and the drainage pipe installation hole to form a compact anti-seepage layer, drawing out the first drainage pipe before the anti-seepage layer is finally set and when the anti-seepage layer has certain strength, and inserting the first drainage pipe after the anti-seepage layer is finally set to prevent the first drainage pipe from being bonded with the anti-seepage layer;
arranging overflow holes extending to the underground water burying position at the bottom end of the drainage pipe along the tunneling direction of the tunnel, discharging a large amount of drainage water, and temporarily plugging the opening of the drainage pipe by paying attention, such as installing a gate valve, a ball valve and the like;
the bottom of the tunnel is provided with a second drain pipe, a corrugated pipe and a third drain pipe which are communicated with each other, and the first drain pipe is connected with the second drain pipe for draining;
after no large underground water is discharged, the first drainage pipe is removed, and the second drainage pipe is moved to the outer side of the gun quilt;
drilling an anti-seepage layer, wherein the drilling depth of the anti-seepage layer is greater than the depth of a blast hole required to be drilled;
installing a plug at the end part of the anti-seepage layer after drilling to plug the residual underground water;
drilling, blasting and slag conveying construction are continued;
removing rock slag generated by blasting, taking out the plug, installing the first drain pipe again, connecting the first drain pipe with the second drain pipe again, draining residual underground water, removing the first drain pipe, the second drain pipe, the corrugated pipe and the third drain pipe, and drilling out all the impermeable water layers;
and (5) continuing drilling, blasting and slag conveying construction until the tunnel is communicated.
It should be noted that when there are multiple underground waters in the tunnel driving direction, the steps of advanced drainage and re-blasting can be repeated. Wherein the steps of advanced water drainage and re-blasting are as follows in sequence: the method comprises the steps of arranging a drainage mounting hole on the tunnel face of the tunnel, installing a first drainage pipe in the drainage pipe mounting hole, building a water seepage prevention layer, drilling an overflow hole, draining, drilling a water seepage prevention layer, installing a plug, blasting slag transportation, taking out the plug, discharging residual underground water, drilling all the water seepage prevention layers, and blasting slag transportation.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. The utility model provides a tunnel blasting excavation system, includes spillway hole (1), drain pipe mounting hole (2), its characterized in that: the drain pipe mounting holes (2) and the overflow holes (1) are sequentially arranged from the tunnel face to the inside along the tunneling direction of the tunnel (3), and first drain pipes (4) are matched in the drain pipe mounting holes (2);
an anti-seepage layer (5) is filled between the outer wall of the first drainage pipe (4) and the inner side wall of the drainage pipe mounting hole (2), the first drainage pipe (4) can axially slide along the first drainage pipe (4), the first drainage pipe (4) is communicated with the overflow hole (1), and the first drainage pipe (4) is used for draining water flowing out of the overflow hole (1);
be equipped with second drain pipe (6), third drain pipe (7) in tunnel (3), second drain pipe (6), third drain pipe (7) are arranged in proper order towards the tunnel entrance to a cave by the palm, second drain pipe (6) one end can be dismantled with first drain pipe (4) and be connected, second drain pipe (6) other end passes through bellows (8) and links to each other with third drain pipe (7).
2. The tunneling blasting excavation system of claim 1, wherein: and a plug (9) is also matched in the through hole of the anti-seepage layer (5), the plug (9) is detachably connected with the anti-seepage layer (5), and the plug (9) is used for plugging the through hole of the anti-seepage layer (5).
3. The tunneling blasting excavation system of claim 2, wherein: the plug (9) comprises a flexible sleeve (10), the outer diameter of the flexible sleeve (10) is matched with the inner diameter of a through hole of the impermeable layer (5), a threaded sleeve (11) is embedded in one end of the flexible sleeve (10), and an expansion hole (12) is formed in the other end of the flexible sleeve (10);
the plug (9) further comprises an expansion rod (13), the inner end of the expansion rod (13) is a threaded section (14), the outer end of the expansion rod (13) is a conical section (15), the outer side of the conical section (15) inclines towards the threaded section (14), the threaded section (14) is in threaded connection with a threaded sleeve (11), and the outer diameter of the small end of the conical section (15) is larger than the inner diameter of an expansion hole (12).
4. The tunneling blasting excavation system of claim 3, wherein: expansion link (13) outer end still is fixed with carousel (24), the through-hole internal diameter adaptation of carousel (24) external diameter and prevention of seepage water layer (5), carousel (24) are equipped with a plurality of rotatory holes (25), rotatory hole (25) axis is parallel with carousel (24) axis, rotatory hole (25) are along carousel (24) axis circumference equipartition.
5. The tunneling blasting excavation system of claim 1, wherein: still include big gun by (16), big gun by (16) are parallel with tunnel (3) face, big gun by (16) and tunnel (3) lateral wall detachable connection.
6. The tunneling blasting excavation system of claim 5, wherein: still be equipped with exhaust pipe (17), blast pipe (18) in tunnel (3), exhaust pipe (17), blast pipe (18) all are connected with the fan, exhaust pipe (17) the inner, blast pipe (18) the inner all is located between big gun quilt (16) and the face.
7. The tunneling blasting excavation system of claim 5, wherein: the top of the tunnel (3) is also provided with a plurality of water curtain pipes (19), the water curtain pipes (19) are positioned outside the cannon quilt (16), the water curtain pipes (19) are connected with a clean water pump, and the water curtain pipes (19) are detachably connected with the top of the tunnel (3).
8. The tunneling blasting excavation system of claim 5, wherein: the gun and quilt combined device is characterized by further comprising a plurality of water spraying heads (20), wherein the water spraying heads (20) are connected with a water pump, the upper end of the gun and quilt (16) is provided with a water spraying head mounting hole (21), and the water spraying head mounting hole (21) is used for mounting the water spraying heads (20);
the inner end of the sprinkler head mounting hole (21) is provided with a rubber baffle (22), one side of the rubber baffle (22) is fixedly connected with the fortunes cannon quilt (16), and the side, opposite to the fixedly connected side of the rubber baffle (22) and the fortunes cannon quilt (16), is naturally attached to the inner side of the cannon quilt (16).
9. The tunneling blasting excavation system according to any one of claims 7 and 8, wherein: the tunnel (3) bottom is equipped with sump pit (23), sump pit (23) are located the big gun quilt (16) outside.
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| CN201921259903.6U CN210195753U (en) | 2019-08-05 | 2019-08-05 | Tunnel blasting excavation system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110295913A (en) * | 2019-08-05 | 2019-10-01 | 中信国安建工集团有限公司 | A kind of tunnel blasting excavation system and construction method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110295913A (en) * | 2019-08-05 | 2019-10-01 | 中信国安建工集团有限公司 | A kind of tunnel blasting excavation system and construction method |
| CN110295913B (en) * | 2019-08-05 | 2024-05-07 | 中信国安建工集团有限公司 | Tunnel blasting excavation system and construction method |
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