CN113982653A - Tunnel fractured rock mass grouting water plugging device and method - Google Patents
Tunnel fractured rock mass grouting water plugging device and method Download PDFInfo
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- CN113982653A CN113982653A CN202111463063.7A CN202111463063A CN113982653A CN 113982653 A CN113982653 A CN 113982653A CN 202111463063 A CN202111463063 A CN 202111463063A CN 113982653 A CN113982653 A CN 113982653A
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- grouting
- grout
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
Abstract
The invention provides a grouting water plugging device and method for a fractured rock mass of a tunnel, and solves the problem that existing grouting equipment has certain defects. Including the slip casting pipe, coaxial slidable mounting has two holding rings on the surface of slip casting pipe, fixed mounting has a plurality of location section of thick bamboos on the surface of the one end that two holding rings are close to each other, the inside slidable mounting of every location section of thick bamboo has the location ball, coaxial fixedly connected with telescopic sleeve between the side that two holding rings are close to each other, equal coaxial fixed mounting has the wall gasbag on the surface of the one end that two holding rings kept away from each other, the right-hand member coaxial coupling of slip casting pipe has cylindric slip casting mouth, coaxial connection has the bolt dish on the surface of slip casting mouth, the bolt dish passes through bolt fixed mounting on the side of rock mass, the right-hand member of slip casting mouth is connected with into thick liquid pipe. The grouting pipe is lifted by the positioning balls and is always positioned in the middle of the grouting hole, so that the grouting holes can all discharge grout for filling.
Description
Technical Field
The invention relates to the technical field of tunnel construction, in particular to a grouting water plugging device and method for a fractured rock mass of a tunnel.
Background
Most areas of China are mountainous areas, particularly southwest areas, a large number of tunnels are inevitably constructed when a traffic infrastructure is constructed, carbonate rocks in the southwest areas are widely distributed, annual precipitation is large, development of karst and fault fracture zones is obvious, and when the tunnels are constructed in the areas, bad geology such as karst and fault fracture zones can be encountered, and if measures are not taken for control, serious casualties and economic losses can be brought;
in addition, in the using process of the tunnel, due to natural factors such as geological motion, a large number of cracks can be generated inside the rock mass around the tunnel, and the cracks inside the rock mass can cause a series of serious accidents such as tunnel collapse, so that the rock mass cracks generated in the using process of the tunnel are blocked and treated only slowly.
At present, grouting into a rock body crack is one of important means for treating such unfavorable geology and improving the stability of tunnel surrounding rocks, during grouting, a rock drilling machine is usually used for drilling a hole at a calibration position, then fluid mortar is injected into the hole through an anchor rod (grouting pipe), and the stability of a supporting structure is effectively improved through slurry diffusion and in-hole consolidation.
However, in the long-time use process, it is found that the existing grouting equipment still has certain disadvantages:
1. in the grouting process, an anchor rod (grouting pipe) is inserted into a grouting hole in a rock body and is contacted with the bottom of the grouting hole, the inner wall of the grouting hole can block a grout outlet hole at the bottom of the grouting pipe, the number of effective grout outlets in a grouting space is insufficient under the condition of certain grouting pressure, and the grouting speed is very slow especially under the condition of a rock foundation with fault cracks;
2. because stratum conditions are complex, fault cracks and other working conditions exist in the stratum, if the calibration position is just located at a position corresponding to the fault cracks, mortar can be lost into the fault in the grouting process, the mortar consumption for completely filling the fault cracks can be quite large, and under the condition that the grouting space is too large, quick-setting expansion mortar can be unevenly filled in the hole, a grouting leaking cavity is formed, and the supporting and reinforcing strength is affected;
3. after grouting, the grout inlet pipe needs to be separated from the anchor rod (grouting pipe) and then a sealing cover needs to be installed for sealing, but grout in the grouting space is not solidified, and grout flows out of the pipe orifice when the grout inlet pipe is separated from the anchor rod (grouting pipe), so that grout in the grouting space is lost.
Therefore, the invention provides a grouting water plugging device and method for a fractured rock mass of a tunnel to solve the problems.
Disclosure of Invention
Aiming at the situation, in order to overcome the defects of the prior art, the invention provides a device and a method for grouting and water plugging of fractured rock mass of a tunnel, which effectively solve the problem that the existing grouting equipment has certain defects.
A grouting and water plugging device for a tunnel fractured rock mass comprises a grouting pipe, wherein a plurality of grout outlet holes are formed in the outer surface of the grouting pipe in a penetrating manner, the grouting pipe is inserted into a grouting hole pre-drilled in the rock mass, the grouting device is characterized in that two positioning rings are coaxially and slidably mounted on the outer surface of the grouting pipe, a plurality of positioning cylinders are fixedly mounted on the outer surface of one end, close to each other, of the two positioning rings, a positioning ball is slidably mounted inside each positioning cylinder, a positioning spring is mounted in each positioning cylinder, a telescopic sleeve is coaxially and fixedly connected between one side faces, close to each other, of the two positioning rings, a partition air bag is coaxially and fixedly mounted on the outer surface of one end, far away from each other, of the right end of the grouting pipe is coaxially connected with a cylindrical grouting nozzle, a bolt disc is coaxially connected on the outer surface of the grouting nozzle, and is fixedly mounted on the side face of the rock mass through bolts, the right end of the grouting nozzle is connected with a grout inlet pipe.
Preferably, the outer surface of the grouting pipe is provided with positioning sliding grooves, the inner side surfaces of the positioning rings are respectively connected with a positioning sliding block which is slidably mounted in the positioning sliding grooves, the outer surface of the grouting pipe is provided with a thread groove, and one ends of the two positioning rings, which are far away from each other, are coaxially and rotatably mounted with positioning inner thread sleeves.
Preferably, be located the slip casting pipe right-hand member coaxial fixedly connected with inside cavity and left side open-ended air ring on the surface of swivel nut in the location, the left side opening internal seal of air ring rotates and installs the air ring gleitbretter, the left surface of air ring gleitbretter and the wall gasbag that is located the slip casting pipe right-hand member communicate between have middle trachea, two it has flexible bronchus to separate the intercommunication between the gasbag.
Preferably, coaxial rotation installs the adjustable ring on the surface of slip casting mouth, bolt dish coaxial rotation connects on the lateral surface of adjustable ring, it has a plurality of flexible intake pipes that are located the inside of slip casting hole to run through between the side about the adjustable ring, and is a plurality of flexible intake pipe is located the downthehole one end of slip casting respectively with gas ring fixed connection and with the inside intercommunication of gas ring.
Preferably, fixed mounting has two sealing rings that are concentric ring-type installation on the left surface of adjustable ring, coaxial arrangement has the right-hand member to be the sealed boss ring of boss form on the lateral surface of slip casting mouth, and is a plurality of sealed boss ring is run through respectively to flexible intake pipe, sealed boss ring is connected with sealing spring with the left surface of adjustable ring.
Preferably, the coaxial fixed mounting in inside of slip casting mouth has only to starch the ring, end four fixedly connected with on the left surface of thick liquid ring and end thick liquid poles, four end thick liquid pole go up horizontal slidable mounting have be located the middle part of slip casting mouth and the right-hand member be conical end thick liquid stopper, end the left surface and four of thick liquid stopper equal fixed mounting has only to starch the spring between the left end of thick liquid pole.
Preferably, according to the claim-the grouting water plugging device for the fractured rock body of the tunnel is used by the following specific method:
when no fault exists in the rock mass: a. placing the grouting pipe in the grouting hole, pushing the grouting pipe into the grouting hole, sliding the positioning balls on the two positioning rings into the positioning cylinders, and pushing the positioning balls into the grouting pipe, wherein the positioning balls are abutted against the inner wall of the grouting hole, so that the grouting pipe is always positioned in the middle of the grouting hole;
b. fixing the bolt plate on a rock body by using bolts, then injecting grout into the grouting pipe, jacking the grout to the left side to enable the grout to enter the grouting pipe, and finally enabling the grout to flow out of the grout outlet holes and flow into rock body cracks for filling;
c. after filling up the thick liquid in the rock mass crack, the thick liquid will fill up the slip casting hole gradually, and the thick liquid that is located the slip casting outside in the slip casting hole will promote to move in two sealing rings of sealed boss ring to strut two sealing rings, thereby seal the slip casting hole opening part, advance the thick liquid pipe and stop when pouring into the thick liquid into the slip casting mouth, end the thick liquid stopper and end the thick liquid ring and can seal the slip casting mouth, the thick liquid is followed slip casting mouth outflow when preventing to dismantle the slip casting pipe.
Preferably, according to the claim-the grouting water plugging device for the fractured rock body of the tunnel is used by the following specific method:
when a fault exists in the rock mass: a. placing the grouting pipe in the grouting hole, enabling the positioning balls to abut against the inner wall of the grouting hole and move towards the grouting hole along with the grouting pipe, enabling the positioning balls at the left end of the grouting pipe to pop out of the positioning cylinders when entering a fault, enabling the grouting pipe not to move continuously when the positioning balls at the left end of the grouting pipe abut against the left side of the fault, then rotating the adjusting ring to drive the positioning ring at the right side to move towards the left side, enabling the positioning balls at the right side to pop out at the same time when entering the fault and abutting against the right side of the fault, and enabling the grouting pipe not to move left and right at the moment;
b. air is injected into the two partition airbags through the telescopic air inlet pipe of the ejector rod, so that the two partition airbags are expanded and tightly abut against the inner wall of the grouting hole, and thus the partition is realized between the fault and the grouting hole;
c. after filling up the thick liquid in the rock mass crack, the thick liquid will fill up the slip casting hole gradually, and the thick liquid that is located the slip casting outside in the slip casting hole will promote to move in two sealing rings of sealed boss ring to strut two sealing rings, thereby seal the slip casting hole opening part, advance the thick liquid pipe and stop when pouring into the thick liquid into the slip casting mouth, end the thick liquid stopper and end the thick liquid ring and can seal the slip casting mouth, the thick liquid is followed slip casting mouth outflow when preventing to dismantle the slip casting pipe.
Compared with the prior art, the invention has the following advantages:
1. the grouting pipe can be lifted by the positioning balls and is always positioned in the middle of the grouting hole, so that the grouting holes can all discharge grout for filling;
2. the inner fault of the rock mass can be blocked by two groups of positioning balls and two partition air bags, so that grout is prevented from flowing into the fault, and the waste of the grout is avoided;
3. when the grout in the grouting hole is filled, the sealing boss ring can be pushed to be tightly matched with the sealing ring, so that the grout cannot flow out of the grouting hole when the grout is filled;
4. when the slurry inlet pipe stops injecting slurry into the grouting nozzle, the slurry stop plug moves towards the slurry stop ring and automatically seals the grouting nozzle, so that the slurry cannot be sprayed out of the grouting nozzle when the slurry inlet pipe is separated from the grouting nozzle, and the loss of the slurry in the grouting hole is avoided;
the grouting device is clear in design thought, simple in structure and simple in operation, overcomes the defects of the existing grouting equipment, and has strong practicability.
Drawings
FIG. 1 is a schematic perspective sectional view of a grouting pipe of the present invention in a grouting hole.
FIG. 2 is a front sectional view of a grouting pipe of the present invention in a grouting hole.
Fig. 3 is a perspective view of the grouting pipe of the present invention.
Fig. 4 is an enlarged view of the invention at a in fig. 1.
Fig. 5 is an enlarged view of the invention at B in fig. 2.
FIG. 6 is a schematic cross-sectional view of a fractured layer of a rockmass according to the present invention.
Fig. 7 is an enlarged view of the invention at C in fig. 3.
Fig. 8 is an enlarged view of the invention at D in fig. 4.
Fig. 9 is an enlarged view of the invention at E in fig. 5.
Fig. 10 is an enlarged view of the invention at F in fig. 4.
Fig. 11 is an enlarged view of the invention at G in fig. 5.
Fig. 12 is an enlarged view at H of fig. 9 according to the present invention.
Detailed Description
The foregoing and other aspects, features and advantages of the invention will be apparent from the following more particular description of embodiments of the invention, as illustrated in the accompanying drawings in which reference is made to figures 1 to 12. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.
Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
The first embodiment of the invention relates to a grouting water plugging device for a tunnel fractured rock body, which comprises a grouting pipe 1, wherein the length of the grouting pipe 1 depends on the position and the depth of a fracture, a plurality of grout outlet holes 01 penetrate through the outer surface of the grouting pipe 1, grout entering the grouting pipe 1 can flow out of the plurality of grout outlet holes 01 and fill the fracture, the grouting pipe 1 is inserted into a grouting hole 03 pre-punched in a rock body 02, the diameter of the grouting pipe 1 is smaller than that of the grouting hole 03, the position of the grouting hole 03 can be measured by other means by a person skilled in the art, the first embodiment is not repeated herein, two positioning rings 2 are coaxially and slidably mounted on the outer surface of the grouting pipe 1, the two positioning rings 2 can respectively slide left and right on the grouting pipe 1 to adjust the position under the driving of an external force, when the external force is removed, the two positioning rings 2 can realize positioning on the grouting pipe 1, a plurality of positioning cylinders 3 are fixedly mounted on the outer surface of one end, close to each other, of the two positioning rings 2, a positioning ball 4 is slidably mounted in each positioning cylinder 3, a positioning spring 5 is mounted in each positioning cylinder 3, the positioning balls 4 are positioned on the outer side of the positioning cylinders 3 under the action of the positioning springs 5, when the grouting pipe 1 is inserted into the grouting hole 03, the positioning balls 4 can be pressed into the positioning cylinder 3 to slide into the positioning cylinder 3, when the positioning rings 2 are positioned in the grouting holes 03, a plurality of positioning balls 4 tightly abut against the inner wall of the grouting hole 03 under the action of a positioning spring 5, thereby lifting the grouting pipe 1, enabling the grouting pipe 1 to be always in a suspended state in the grouting hole 03, avoiding the situation that the grout outlet 01 at the bottom of the grouting pipe 1 is blocked by the inner wall of the grouting hole 03, slurry can flow out of the slurry outlet holes 01 to fill the cracks, so that the grouting efficiency is greatly improved, and the operation can be used for the situation that no fault exists in the tunnel surrounding rock;
a telescopic sleeve 6 is coaxially and fixedly connected between one side surfaces of the two positioning rings 2 which are close to each other, when the two positioning rings 2 slide on the grouting pipe 1 to be far away from each other or close to each other, the telescopic sleeve 6 can be driven to extend or shorten, the grout outlet 01 covered by the telescopic sleeve 6 can not flow out of the grout outlet 03, when a fault exists in the tunnel surrounding rock, in order to prevent the grout from flowing into the fault, the left positioning ring 2 can be moved to the approximate position on the grouting pipe 1 corresponding to the left side surface of the fault before the grouting pipe 1 is inserted into the grouting hole 03, then the grouting pipe 1 is inserted into the grouting hole 03 and pushed into the grouting hole 03, when the left positioning balls 4 enter the fault, the left positioning balls 4 lose binding force and can be popped out from the positioning cylinders 3, when the grouting pipe 1 continues to be pushed into the grouting hole 03, so that the left positioning balls 4 are abutted against the left side surface of the fault, at this moment, the grouting pipe 1 cannot move continuously towards the inside of the grouting hole 03, then the positioning ring 2 on the right side can move towards the left end of the grouting pipe 1, while the positioning ring 2 on the right side moves, the grouting pipe 1 also moves towards the right side, at this moment, because the positioning balls 4 on the right side are still in the grouting hole 03, the grouting pipe 1 can move towards the right side, a worker can judge whether the positioning balls 4 on the right side enter a fault through the phenomenon, and the positioning balls 4 on the right side can also pop out simultaneously when entering the fault, as shown in figure 6, the positioning balls 4 on the left side and the right side respectively abut against the left side and the right side of the fault, so that the grouting pipe 1 cannot move left and right, the telescopic sleeve 6 between the two positioning ring 2 supports can cover the grout outlet 01 at the fault position, and only the fixation of the grouting pipe 1 in the rock body 02 with the fault is completed through the above operation steps, if the grout is injected into the grout pipe 1 at this time, the grout flows into the fault when flowing into the grout hole 03 from the uncovered grout outlet hole 01, so that the next operation is required to be carried out in the following structure;
the outer surfaces of the ends, far away from each other, of the two positioning rings 2 are coaxially and fixedly provided with partition airbags 7, the two partition airbags 7 are respectively connected with air pumps positioned outside the grouting hole 03, as shown in the attached drawing 6, when the positioning balls 4 on the left side and the right side of the fault respectively abut against the left side and the right side of the fault, so that the grouting pipe 1 cannot move left and right, the two partition airbags 7 are positioned in the grouting hole 03 and respectively approach the two sides of the fault, then the two partition airbags 7 can be inflated, the outer surfaces of the two partition airbags 7 can tightly abut against the inner wall of the grouting hole 03 after being bulged, so that the fault is completely separated from the space of the grouting hole 03, and when grout is injected into the grouting hole 03, due to the obstruction of the two partition airbags 7, the grout cannot flow into the fault, and a large amount of grout is prevented from being wasted;
the right end of the grouting pipe 1 is coaxially connected with a cylindrical grouting nozzle 8, the grouting pipe 1 can be in threaded connection with the grouting nozzle 8, when the grouting pipe 1 is completely inserted into the grouting hole 03, the grouting nozzle 8 can also be inserted into the grouting hole 03 and blocks the orifice of the grouting hole 03, as the diameter of the grouting pipe 1 is smaller than that of the grouting hole 03, in order to prevent grout from flowing out of the orifice of the grouting hole 03 during grouting, the grouting nozzle 8 with a larger diameter is adopted to block the orifice of the grouting hole 03 and prevent grout from flowing out of the orifice during grouting, a bolt disc 9 is coaxially connected to the outer surface of the grouting nozzle 8, the bolt disc 9 is fixedly installed on the side surface of the rock body 02 through a bolt 04, the right end of the grouting nozzle 8 is connected with a grout inlet pipe 05, the grout inlet pipe 05 and the grouting nozzle 8 can be in threaded connection, so that the grouting pipe 05 and the grouting nozzle 8 are convenient to disassemble, and the grouting pipe 05 is connected with a grout supply device, and the grouting pipe and the grouting nozzle 8 are separated from each other, and finally, sealing the grouting nozzle 8.
Embodiment two, on the basis of embodiment one, it has location spout 10, two to open along the axial direction of slip casting pipe 1 on the surface of slip casting pipe 1 all be connected with the location slider 11 of slidable mounting in location spout 10 on the medial surface of holding ring 2, can drive location slider 11 and slide in location spout 10 when holding ring 2 horizontal slip, therefore holding ring 2 can't rotate on slip casting pipe 1, it has thread groove 12, two to open on the surface of slip casting pipe 1 the equal coaxial rotation of one end that holding ring 2 kept away from each other installs interior swivel nut 13 in the location, when rotating two location interior swivel nuts 13, can drive holding ring 2 and remove about slip casting pipe 1, also makes holding ring 2 can realize the location after removing required position.
In the third embodiment, on the basis of the second embodiment, the outer surface of the inner screw sleeve 13 positioned at the right end of the grouting pipe 1 is coaxially and fixedly connected with an air ring 14 which is hollow inside and has an opening at the left side, the inner screw sleeve 13 positioned at the right end can drive the air ring 14 to synchronously rotate when rotating, an air ring sliding sheet 15 is hermetically and rotatably installed in the opening at the left side of the air ring 14, the air ring sliding sheet 15 can rotate at the opening at the left side of the air ring 14, the inner space of the air ring 14 is sealed through the air ring sliding sheet 15, an intermediate air pipe 16 is communicated between the left side surface of the air ring sliding sheet 15 and a partition air bag 7 positioned at the right end of the grouting pipe 1, the partition air bag 7 cannot rotate, so that the air ring sliding sheet 15 connected with the partition air bag 7 through the intermediate air pipe 16 cannot rotate, but the inner screw sleeve 13 positioned at the right end can drive the air ring 14 to rotate on the air ring sliding sheet 15 when rotating, two the intercommunication has flexible bronchus 17 between cutting off the trachea 7, when the swivel nut 13 rotated in the location on right side drove the holding ring 2 on right side and remove and keep away from each other or be close to each other with another holding ring 2, flexible bronchus 17 between two cutting off gasbags 7 also can extend or shorten for the inside of two cutting off gasbags 7 communicates all the time, when needs are aerifyd two cutting off gasbags 7, can aerify in the gas ring 14, the air in the gas ring 14 can make two cutting off gasbags 7 to swell through middle trachea 16 and flexible bronchus 17 and cut off the fault.
In the fourth embodiment, on the basis of the third embodiment, an adjusting ring 18 is coaxially and rotatably installed on the outer surface of the grouting nozzle 8, the outer diameter of the adjusting ring 18 is smaller than the diameter of the grouting hole 03, as shown in fig. 10-11, when the grouting nozzle 8 is fixed on the rock body 02 through a bolt 04, the adjusting ring 18 just blocks the orifice of the grouting hole 03, and at this time, the adjusting disc 18 can still rotate on the outer surface of the grouting nozzle 8, the bolt disc 9 is coaxially and rotatably connected to the outer side surface of the adjusting ring 18, when the bolt disc 9 is fixed on the rock body 02 through the bolt 04, the adjusting disc 18 can rotate between the grouting nozzle 8 and the bolt disc 9, a plurality of telescopic air inlet pipes 19 located inside the grouting hole 03 penetrate through the left and right side surfaces of the adjusting ring 18, the adjusting disc 18 can drive the plurality of telescopic air inlet pipes 19 to perform circular motion inside the grouting hole 03 when rotating, and one ends of the plurality of the telescopic air inlet pipes 19 located inside the grouting hole 03 are respectively fixedly connected to the air ring 14 and fixedly connected to the air ring 14 Inside intercommunication, the adjusting disk 18 can drive gaseous ring 14 through the flexible intake pipe 19 of ejector pin when rotating and rotate to the swivel nut 13 rotates in the location that drives the right side, realizes the regulation to holding ring 2 on right side, and after the position mediation of holding ring 2 on right side finishes, the flexible intake pipe 19 of accessible is aerifyd gaseous ring 14 is inside, can realize two blouses that cut off gasbag 7, thereby cuts off the fault.
In the fifth embodiment, on the basis of the fourth embodiment, two sealing rings 20 which are concentrically and annularly installed are fixedly installed on the left side surface of the adjusting ring 18, the adjusting ring 18 can drive the two sealing rings 20 to rotate when rotating, a sealing boss ring 21 whose right end is in a boss shape is coaxially installed on the outer side surface of the grouting nozzle 8, a plurality of telescopic air inlet pipes 19 respectively penetrate through the sealing boss ring 21, the sealing boss ring 21 and the left side surface of the adjusting ring 18 are connected with a sealing spring 22, the adjusting ring 18 can drive the sealing boss ring 21 to synchronously rotate on the grouting nozzle 8 through the plurality of telescopic air inlet pipes 19 when rotating, and due to the effect of the sealing spring 22, the sealing boss ring 21 has a certain distance from the two sealing rings 20 in a natural state, when the grout in the grouting hole 03 is gradually filled, the grout in the grouting hole 03 can push the sealing boss ring 21 to the right side so that the boss at the right end of the sealing boss ring 21 enters a space between the two sealing rings 20, and extrude two sealing rings 20 respectively to the outside and inboard, the sealing ring 20 that is located the outside and the inner wall in close contact with of grouting hole 03, the sealing ring 20 that is located the inboard and the surface in close contact with of slip casting mouth 8 to make adjustable ring 18 can not rotate again, also realized the sealed of slip casting mouth 8 with the slurrying of grouting hole 03, avoided the condition that the thick liquid flows from the drill way department of slip casting hole 03.
Sixth embodiment, on the basis of the first embodiment, a grout stop ring 23 is coaxially and fixedly installed inside the grouting nozzle 8, as shown in fig. 10 to 11, the inner diameter of the grout stop ring 23 is smaller than the inner diameter of the grouting nozzle 8, four grout stop rods 24 are fixedly connected to the left side surface of the grout stop ring 23, grout stop plugs 25 which are located in the middle of the grouting nozzle 8 and have tapered right ends are installed on the four grout stop rods 24 in a left-right sliding manner, grout stop springs 26 are fixedly installed between the left side surface of the grout stop plug 25 and the left ends of the four grout stop rods 24, the outer diameter of the grout stop plug 25 is larger than the inner diameter of the grout stop ring 23 but smaller than the inner diameter of the grouting nozzle 8, the grout stop plugs 25 can slide on the four grout stop rods 24 in a left-right sliding manner, the tapered surfaces of the grout stop plugs 25 are made of rubber, and under the elastic force of the four grout stop springs 26, the natural state of the grout stop plug 25 is shown in fig. 11, the conical surface of the grout stop plug 25 is tightly attached to the inner ring of the grout stop ring 23, the left end and the right end of the grouting nozzle 8 are not through, when grouting is carried out, when grout is injected into the grouting nozzle 8 through the grout inlet pipe 05, under the impact pressure of the grout, the grout stop plug 25 is pushed open towards the left end of the grouting nozzle 8, so that the grout stop plug 25 is separated from the grout stop ring 23, the grout can flow through a gap between the grout stop plug 25 and the grouting nozzle 8 at the moment, so that the grout reaches the grouting pipe 1 to be grouted, when the grouting hole 03 is filled with the grout, the grouting operation can be finished, at the moment, the grouting of the grout inlet pipe 05 can be stopped, when the grouting of the grout inlet pipe 05 is stopped, the grout stop plug 25 loses the driving force of the grout, so that the grout can reset under the elastic force of the four grout stop springs 26 and is tightly attached to the grout stop ring 23 again, the grout in the grouting pipe 1 can not flow out from the grouting nozzle 8, and the automatic sealing of the grouting nozzle 8 is realized, the situation that the slurry flows out at the moment when the slurry inlet pipe 05 is separated from the grouting nozzle 8 is avoided.
A grouting water plugging device for a fractured rock mass of a tunnel comprises the following specific use methods when no fault exists in the rock mass:
a. placing the grouting pipe 1 in the grouting hole 03 and pushing the grouting pipe into the grouting hole 03, sliding the plurality of positioning balls 4 on the two positioning rings 2 into the positioning cylinder 3 and pushing the positioning balls into the grouting pipe 1, wherein the plurality of positioning balls 4 are abutted against the inner wall of the grouting hole 03, so that the grouting pipe 1 is always positioned in the middle of the grouting hole 03;
b. fixing a bolt plate 9 on a rock body 02 by using bolts 04, injecting grout into the grouting pipe 1, jacking the grout to the left side by using a grout stop plug 25 to enable the grout to enter the grouting pipe 1, and finally enabling the grout to flow out of a plurality of grout outlet holes 01 and flow into a rock body crack for filling;
c. after the grout is filled up in the rock mass crack, the grout will fill up grouting hole 03 gradually, the grout that lies in the slip casting pipe 1 outside in the grouting hole 03 will promote sealed boss ring 21 and remove to two sealing rings 20, and strut two sealing rings 20, thereby seal the slip casting hole 03 opening part, when advancing thick liquid pipe 05 and stopping to pouring into the grout in the slip casting mouth 8, only starch stopper 25 can seal slip casting mouth 8 with only starch ring 23, the grout is from slip casting mouth 8 department outflow when preventing to dismantle into thick liquid pipe 05.
A grouting water plugging device for a fractured rock mass of a tunnel comprises the following specific use methods when a fault exists in the rock mass:
a. placing the grouting pipe 1 in the grouting hole 03, enabling the plurality of positioning balls 4 to abut against the inner wall of the grouting hole 03 and move towards the grouting hole 03 along with the grouting pipe 1, when the plurality of positioning balls 4 at the left end of the grouting pipe 1 enter a fault, popping out from the plurality of positioning cylinders 3, when the plurality of positioning balls 4 at the left end abut against the left side of the fault, the grouting pipe 1 cannot move continuously, then rotating the adjusting ring 18 to drive the positioning ring 2 at the right side to move towards the left side, when the plurality of positioning balls 4 at the right side enter the fault, popping out at the same time and abutting against the right side of the fault, and at the moment, the grouting pipe 1 cannot move left and right;
b. air is injected into the two partition airbags 7 through the mandril telescopic air inlet pipe 19, so that the two partition airbags 7 are expanded and tightly abut against the inner wall of the grouting hole 03, so that the partition is realized between the fault and the grouting hole 03, the grout outlet 01 in the fault on the grouting pipe 1 is covered by the telescopic sleeve 6, when grout is injected into the grouting pipe 1, the grout can only flow out from the grout outlet 01 in the grouting hole 03 to fill the rock body fracture, and the grout cannot flow into the fault to cause great waste of the grout;
c. after the grout is filled up in the rock mass crack, the grout will fill up grouting hole 03 gradually, the grout that lies in the slip casting pipe 1 outside in the grouting hole 03 will promote sealed boss ring 21 and remove to two sealing rings 20, and strut two sealing rings 20, thereby seal the slip casting hole 03 opening part, when advancing thick liquid pipe 05 and stopping to pouring into the grout in the slip casting mouth 8, only starch stopper 25 can seal slip casting mouth 8 with only starch ring 23, the grout is from slip casting mouth 8 department outflow when preventing to dismantle into thick liquid pipe 05.
Compared with the prior art, the invention has the following advantages:
1. the grouting pipe can be lifted by the positioning balls and is always positioned in the middle of the grouting hole, so that the grouting holes can all discharge grout for filling;
2. the inner fault of the rock mass can be blocked by two groups of positioning balls and two partition air bags, so that grout is prevented from flowing into the fault, and the waste of the grout is avoided;
3. when the grout in the grouting hole is filled, the sealing boss ring can be pushed to be tightly matched with the sealing ring, so that the grout cannot flow out of the grouting hole when the grout is filled;
4. when the slurry inlet pipe stops injecting slurry into the grouting nozzle, the slurry stop plug moves towards the slurry stop ring and automatically seals the grouting nozzle, so that the slurry cannot be sprayed out of the grouting nozzle when the slurry inlet pipe is separated from the grouting nozzle, and the loss of the slurry in the grouting hole is avoided;
the grouting device is clear in design thought, simple in structure and simple in operation, overcomes the defects of the existing grouting equipment, and has strong practicability.
Claims (8)
1. The utility model provides a tunnel crack rock mass slip casting water shutoff device, includes slip casting pipe (1), it has a plurality of grout outlet (01) to run through on the surface of slip casting pipe (1), slip casting pipe (1) inserts in slip casting hole (03) of beating in advance on rock mass (02), its characterized in that, coaxial slidable mounting has two holding rings (2) on the surface of slip casting pipe (1), two fixed mounting has a plurality of location section of thick bamboo (3) on the surface of the one end that the holding ring (2) is close to each other, every the inside slidable mounting of a location section of thick bamboo (3) has location ball (4), every all install positioning spring (5) in a location section of thick bamboo (3), two coaxial fixedly connected with telescope tube (6) between the side that the holding ring (2) are close to each other, two equal coaxial fixed mounting has wall gasbag (7) on the surface of the one end that the holding ring (2) keep away from each other, the right-hand member coaxial coupling of slip casting pipe (1) has cylindric slip casting mouth (8), coaxial coupling has bolt dish (9) on the surface of slip casting mouth (8), bolt dish (9) pass through bolt (04) fixed mounting on the side of rock mass (01), the right-hand member of slip casting mouth (8) is connected with into thick liquid pipe (05).
2. The grouting water plugging device for the fractured rock mass of the tunnel according to claim 1, wherein a positioning sliding groove (10) is formed in the outer surface of the grouting pipe (1), positioning sliding blocks (11) which are slidably mounted in the positioning sliding groove (10) are connected to the inner side surfaces of the two positioning rings (2), a threaded groove (12) is formed in the outer surface of the grouting pipe (1), and a positioning inner threaded sleeve (13) is coaxially and rotatably mounted at one end, far away from each other, of the two positioning rings (2).
3. The grouting water plugging device for the fractured rock mass in the tunnel according to claim 2, wherein an air ring (14) which is hollow inside and is open at the left side is coaxially and fixedly connected to the outer surface of the positioning threaded sleeve (13) at the right end of the grouting pipe (1), an air ring sliding sheet (15) is installed in the left opening of the air ring (14) in a sealing and rotating mode, an intermediate air pipe (16) is communicated between the left side surface of the air ring sliding sheet (15) and the partition air bag (7) at the right end of the grouting pipe (1), and a telescopic branch air pipe (17) is communicated between the two partition air pipes (7).
4. The grouting water plugging device for the fractured rock mass in the tunnel according to claim 3, wherein an adjusting ring (18) is coaxially and rotatably mounted on the outer surface of the grouting nozzle (8), the bolt disc (9) is coaxially and rotatably connected to the outer side surface of the adjusting ring (18), a plurality of telescopic air inlet pipes (19) located inside the grouting holes (03) penetrate through the left side surface and the right side surface of the adjusting ring (18), and one ends of the plurality of telescopic air inlet pipes (19) located in the grouting holes (03) are respectively fixedly connected with the air ring (14) and are communicated with the inside of the air ring (14).
5. The grouting water plugging device for the fractured rock mass in the tunnel according to claim 4, wherein two sealing rings (20) which are concentrically and annularly installed are fixedly installed on the left side surface of the adjusting ring (18), a sealing boss ring (21) with a boss-shaped right end is coaxially installed on the outer side surface of the grouting nozzle (8), the plurality of telescopic air inlet pipes (19) respectively penetrate through the sealing boss ring (21), and sealing springs (22) are connected to the left side surfaces of the sealing boss ring (21) and the adjusting ring (18).
6. The grouting and water plugging device for the fractured rock mass in the tunnel according to claim 1, wherein a grout stop ring (23) is coaxially and fixedly installed inside the grouting nozzle (8), four grout stop rods (24) are fixedly connected to the left side surface of the grout stop ring (23), a grout stop plug (25) which is located in the middle of the grouting nozzle (8) and is conical in right end is installed on the four grout stop rods (24) in a left-right sliding mode, and grout stop springs (26) are fixedly installed between the left side surface of the grout stop plug (25) and the left ends of the four grout stop rods (24).
7. The grouting water plugging device for the fractured rock body of the tunnel according to the claims 1 to 6, when no fault exists in the rock body, the concrete using method is as follows:
a. placing the grouting pipe (1) in the grouting hole (03) and pushing the grouting pipe (1) into the grouting hole (03), sliding the positioning balls (4) on the two positioning rings (2) into the positioning cylinder (3) and pushing the positioning balls into the grouting pipe (1), wherein the positioning balls (4) are abutted against the inner wall of the grouting hole (03), so that the grouting pipe (1) is always positioned in the middle of the grouting hole (03);
b. fixing a bolt plate (9) on a rock body (02) by using a bolt (04), then injecting grout into the grouting pipe (1), ejecting a grout stop plug (25) towards the left side by the grout to enable the grout to enter the grouting pipe (1), and finally enabling the grout to flow out of a plurality of grout outlet holes (01) and flow into rock body cracks for filling;
c. after the grout is filled up in the rock mass crack, grout will fill up grouting hole (03) gradually, the grout that lies in the slip casting pipe (1) outside in grouting hole (03) will promote sealed boss ring (21) and remove to two sealing ring (20), and strut two sealing ring (20), thereby seal grouting hole (03) opening part, advance thick liquid pipe (05) and stop when pouring into the grout in slip casting mouth (8), only grout stopper (25) and only grout ring (23) can seal slip casting mouth (8), the grout is from slip casting mouth (8) outflow when preventing to dismantle slip casting pipe (05).
8. The grouting water plugging device for the fractured rock body of the tunnel according to the claims 1 to 6, when a fault exists in the rock body, the concrete using method is as follows:
a. placing the grouting pipe (1) in the grouting hole (03), enabling a plurality of positioning balls (4) to abut against the inner wall of the grouting hole (03) and move towards the grouting hole (03) along with the grouting pipe (1), when the positioning balls (4) at the left end of the grouting pipe (1) enter a fault, popping out of a plurality of positioning cylinders (3), when the positioning balls (4) at the left side abut against the left side face of the fault, the grouting pipe (1) cannot move continuously, then rotating the adjusting ring (18) to drive the positioning ring (2) at the right side to move towards the left side, when the positioning balls (4) at the right side enter the fault, popping out at the same time and abutting against the right side face of the fault, and at the moment, the grouting pipe (1) cannot move left and right;
b. air is injected into the two partition airbags (7) through the ejector rod telescopic air inlet pipe (19), so that the two partition airbags (7) are expanded and tightly abut against the inner wall of the grouting hole (03), and therefore, the partition between the fault and the grouting hole (03) is realized, the grout outlet (01) in the fault on the grouting pipe (1) is covered by the telescopic sleeve (6), when grout is injected into the grouting pipe (1), the grout can only flow out from the grout outlet (01) in the grouting hole (03) to fill the rock body fracture, and the grout cannot flow into the fault to cause large waste of the grout;
c. after the grout is filled up in the rock mass crack, grout will fill up grouting hole (03) gradually, the grout that lies in the slip casting pipe (1) outside in grouting hole (03) will promote sealed boss ring (21) and remove to two sealing ring (20), and strut two sealing ring (20), thereby seal grouting hole (03) opening part, advance thick liquid pipe (05) and stop when pouring into the grout in slip casting mouth (8), only grout stopper (25) and only grout ring (23) can seal slip casting mouth (8), the grout is from slip casting mouth (8) outflow when preventing to dismantle slip casting pipe (05).
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| CN202111463063.7A CN113982653B (en) | 2021-12-02 | 2021-12-02 | Tunnel fractured rock mass grouting water plugging device and method |
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| CN114458234A (en) * | 2022-03-29 | 2022-05-10 | 嵩县金牛有限责任公司 | Water plugging construction method for underground aquifer rock mass tunneling |
| CN115030171A (en) * | 2022-06-06 | 2022-09-09 | 中国建筑第七工程局有限公司 | Non-return slip casting pipe joint |
| CN115263391A (en) * | 2022-09-26 | 2022-11-01 | 徐州中矿地科岩土工程技术有限公司 | Geotechnical engineering supporting method and supporting equipment |
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