CN115949084B - Fiber cloth bag grouting and plugging method applied to water burst in karst area - Google Patents
Fiber cloth bag grouting and plugging method applied to water burst in karst area Download PDFInfo
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- CN115949084B CN115949084B CN202310061240.1A CN202310061240A CN115949084B CN 115949084 B CN115949084 B CN 115949084B CN 202310061240 A CN202310061240 A CN 202310061240A CN 115949084 B CN115949084 B CN 115949084B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Abstract
The invention discloses a fiber cloth bag grouting and plugging method applied to water burst in karst areas, which comprises the following steps: s1: detecting a geological state; s2: manufacturing a plugging device; the plugging device comprises a grouting pipe, one end of the grouting pipe is fixedly connected and communicated with a fiber cloth bag, and the other end of the grouting pipe is communicated with a grouting machine; s3: drilling a grouting hole in the direction of a karst cave to be plugged, and extending one end of the fabricated plugging device, which is provided with a fiber cloth bag, into the karst cave; s4: grouting the karst cave, forming a plugging block in the karst cave, and plugging the karst cave; s5, grouting gaps among the plugging blocks to form reinforcing blocks; s6: and checking the blocking condition of the karst cave. According to the invention, the fiber cloth bag is combined with a grouting plugging technology, so that the effects of preventing mud bursting and water bursting are achieved effectively, and the tunnel excavation and jacking are ensured effectively.
Description
Technical Field
The invention relates to the technical field of karst grouting engineering, in particular to a fiber cloth bag grouting and plugging method applied to water burst in karst areas.
Background
At present, in karst areas, water conservancy, traffic, municipal administration, railway, subway tunnel (hole) excavation and jacking pipe jacking, the method for treating the water gushing water of karst tunnel, karst pipeline and strong crack development section is generally adopted:
1. the conventional water-blocking curtain grouting is adopted for blocking, but for karst pipelines with larger water inflow, the water-blocking curtain grouting cannot block, so that a great amount of engineering investment is wasted, and the outflow of slurry pollutes water resources of the groundwater environment;
2. the conventional water blocking curtain grouting is adopted for blocking, and for karst cave and karst pipelines with water burst and water surge, grouting is carried out in silt, cement paste and silt can not be mixed and solidified, and the blocking effect can not be achieved;
3. plugging is performed by implementing a freezing technology, but the technology has high requirements and large investment.
Considering that construction in karst areas frequently occurs and the existing construction method is difficult to meet the safety construction requirement, the invention provides a fiber cloth bag grouting and plugging method applied to the karst areas for water burst.
Disclosure of Invention
The invention aims to provide a fiber cloth bag grouting and plugging method applied to water gushing in karst areas, so as to solve the problems in the prior art.
In order to achieve the above object, the present invention provides the following solutions: the invention provides a fiber cloth bag grouting and plugging method applied to water burst in karst areas, which comprises the following steps:
s1: detecting a geological state;
s2: manufacturing a plugging device; the plugging device comprises a grouting pipe, one end of the grouting pipe is fixedly connected and communicated with a fiber cloth bag, and the other end of the grouting pipe is communicated with a grouting machine;
s3: drilling a grouting hole in the direction of a karst cave to be blocked, and extending one end of the fabricated blocking device, which is provided with the fiber cloth bag, into the karst cave;
s4: grouting into the karst cave fiber cloth bag, forming a plugging block in the karst cave, and plugging the karst cave;
s5: grouting gaps among the plugging blocks to form reinforcing blocks;
s6: and checking the blocking condition of the karst cave.
Preferably, in step S2, two symmetrically arranged fixing shafts are fixed at one end of the grouting pipe facing the fiber cloth bag, a protection iron sheet is connected to the fixing shafts in a rotating mode, the two protection iron sheets are symmetrically arranged to form an annular shape, and the annular shape is sleeved outside the fiber cloth bag.
Preferably, one end of the protection iron sheet, which is far away from the grouting pipe, is provided with a tip, and the two tips are mutually abutted to form a conical head.
Preferably, in step S3, the grouting hole includes a first hole, a second hole and a third hole, the first hole is drilled from the excavated tunnel to the lower section direction of the karst cave, the second hole is drilled from the excavated tunnel to the upper section of the karst cave, and the third hole is located between the first hole and the second hole.
Preferably, in step S4, grouting the karst cave includes the following steps:
s4.1: the plugging device stretches into the karst cave from the first hole and performs grouting to form a first plugging block in the karst cave;
s4.2: the plugging device stretches into the karst cave from the second hole and performs grouting to form a second plugging block in the karst cave;
s4.3: the plugging device stretches into the karst cave from the third hole and performs grouting to form a third plugging block in the karst cave;
s4.4: waiting for the first block, the second block and the third block to solidify, wherein the solidifying time is not less than 24 hours.
Preferably, the water-cement ratio of the slurry of the first blocking and the second blocking grouting is 1:1-0.5:1, and the grouting pressure is 0.3-1.0 MPa or not higher than 1.2 times of the measured water pressure; the water-cement ratio of the slurry of the third block grouting is 1:1-0.5:1, and the grouting pressure is gradually increased but is not more than 1.3 times of the measured water pressure at maximum.
Preferably, in step S5, the reinforcing block is located in a gap between the plugging block and the karst cave, the slurry water cement ratio of grouting of the reinforcing block is 1:1, and the grouting pressure is from small to large, but does not exceed 1.5MPa at maximum.
Preferably, in step S6, the water and mud gushing of the karst cave in the inspection process is not more than 3L/min, then hole sweeping and screen grouting are performed again for curing, the curing time is not less than 12h, and then tunnel excavation can be continued.
The invention discloses the following technical effects: the invention discloses a fiber cloth bag grouting plugging method for water burst in karst areas, which is characterized in that a plugging block is formed by grouting the fiber cloth bag in a karst cave through the combination of a grouting plugging technology and then a reinforcing block is formed by grouting between the plugging blocks, so that the effective mud burst and water burst prevention effects are achieved, the tunnel excavation and jacking of a jacking pipe are effectively ensured, and the fiber cloth bag grouting plugging method for water burst in karst areas has the advantages that:
(1) The grouting investment is saved by the fiber cloth bag grouting blocking method;
(2) The fiber cloth bag and the grouting pipe can be manufactured on site, and the construction operation is convenient;
(3) The slurry poured by the grouting pipe is filled and solidified in the fiber cloth bag, so that the environment is not polluted;
(4) Solves the problem that the pouring slurry is easy to be dispersed under the condition of moving water and the cracks are mutually communicated to cause outflow of a large amount of slurry;
(5) The problem that a karst cave, a karst pipeline and a strong crack development section need to be processed by a skylight when a jacking pipe is jacked in front is solved;
(6) The problem of mud bursting and gushing of the tunnel in the karst cave, karst pipeline and strong crack development stage is solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is an axial view of a fiber cloth bag 12 grouting and plugging method of the present invention applied to a water burst in a karst area;
FIG. 2 is a schematic side view of a grouting and plugging method of a fiber cloth bag 12 applied to water gushing in karst areas;
FIG. 3 is a schematic diagram of the plugging device of the present invention;
FIG. 4 is a schematic diagram of step S4.1 of the present invention;
FIG. 5 is a schematic diagram of step S4.2 of the present invention;
FIG. 6 is a schematic diagram of step S4.3 of the present invention;
FIG. 7 is a schematic diagram of step S5 of the present invention;
wherein, 1, a plugging device; 2. grouting holes; 3. a block; 4. a reinforcing block; 5. karst cave; 6. tunneling; 11. grouting pipes; 12. a fiber cloth bag; 13. a fixed shaft; 14. protecting the iron sheet; 15. a tip; 21. a first hole; 22. a second hole; 23. a third hole; 24. a reinforcing hole; 31. a first block; 32. a second block; 33. a third block; 41. a reinforcing tube; 61. a tunnel face.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
Referring to fig. 1-7, the invention provides a fiber cloth bag grouting and plugging method applied to water burst in karst areas, which comprises the following steps:
s1: detecting a geological state;
s2: manufacturing a plugging device 1; the plugging device 1 comprises a grouting pipe 11, one end of the grouting pipe 11 is fixedly connected and communicated with a fiber cloth bag 12, and the other end of the grouting pipe is communicated with a grouting machine;
s3: drilling a grouting hole 2 in the direction of a karst cave 5 to be plugged, and extending one end of the fabricated plugging device 1, provided with a fiber cloth bag 12, into the karst cave 5;
s4: grouting the karst cave 5, forming a plugging block 3 in the karst cave 5, and plugging the karst cave 5;
s5, grouting gaps among the plugging blocks 3 to form reinforcing blocks 4;
s6: checking the blocking condition of the karst cave 5.
The invention discloses a fiber cloth bag 12 grouting plugging method for water burst in karst areas, which is characterized in that a plugging block 3 is formed by grouting the fiber cloth bag 12 in combination with grouting plugging technology, and a reinforcing block 4 is formed by grouting the plugging block 3, so that the effective mud burst and water burst prevention effects are achieved, and the tunnel excavation and jacking are effectively ensured, and the fiber cloth bag grouting plugging method for water burst in karst areas has the advantages that:
(1) The grouting investment is saved by the fiber cloth bag grouting blocking method;
(2) The fiber cloth bag 12 and the grouting pipe 11 can be manufactured on site, and the construction operation is convenient;
(3) The slurry poured by the grouting pipe 11 is filled and solidified in the fiber cloth bag 12, so that the environment is not polluted;
(4) Solves the problem that the pouring slurry is easy to be dispersed under the condition of moving water and the cracks are mutually communicated to cause outflow of a large amount of slurry;
(5) The problem that a karst cave, a karst pipeline, a crack strong development section and the like are required to be processed by skylight when the jacking pipe is jacked in front is solved;
(6) The problem of mud bursting and gushing of the tunnel in the karst cave, karst pipeline and strong crack development stage is solved.
In a further optimized scheme, in step S2, two symmetrically arranged fixed shafts 13 are fixed at one end of the grouting pipe 11 facing the fiber cloth bag 12, a protection iron sheet 14 is connected to the fixed shafts 13 in a rotating mode, the two protection iron sheets 14 are symmetrically arranged to form a ring, and the ring is sleeved outside the fiber cloth bag 12. In this embodiment, the grouting pipe 11 is a steel pipe Φ90×5, whose length is determined according to the distance from the tunnel face 61 of the excavated tunnel 6 to the karst cave 5 and the insertion direction, and is used for feeding the fiber cloth bag 12 into the karst cave 5, and the grouting pipe 11 is communicated with a grouting machine, and grouting material is injected into the fiber cloth bag 12 in the karst cave 5; the fiber cloth bag 12 is made of synthetic fiber materials with high strength, good wear resistance, seepage prevention and acid and alkali resistance, the size of the fiber cloth bag 12 is determined according to the size of the detected karst cave 5 diameter, which is about 2 times of the karst cave 5 diameter, the inlet of the fiber cloth bag 12 is fixed on the grouting pipe 11 through an iron wire or a binding belt, the karst cave 5 is blocked by swelling after grouting, grouting in the fiber cloth bag 12 can prevent grouting materials from being flushed away by the flushed muddy water, waste caused by leakage of grouting materials is reduced, and the poured grouting materials are prevented from exuding from the fiber cloth bag 12 to pollute the environment; the two protecting iron sheets 14 are made by longitudinally cutting a section of steel pipe phi 110, the inner diameter of the protecting iron sheets is larger than the outer diameter of the grouting pipe 11, the length of the protecting iron sheets is not smaller than the undeployed length of the fiber cloth bag 12, the protecting iron sheets are rotatably connected to the end part of the grouting pipe 11 through a fixed shaft 13 and can rotate by 0-180 degrees, the protecting iron sheets 14 are locked through a pin shaft (not shown in the figure), when the fiber cloth bag 12 expands after grouting, the protecting iron sheets 14 are spread towards two sides and do not obstruct the unfolding of the fiber cloth bag 12, and the protecting iron sheets 14 mainly play a role of protecting the fiber cloth bag 12 so as to prevent the fiber cloth bag 12 from being scratched by rock hole walls when the fiber cloth bag 12 is inserted into the grouting holes 2.
According to a further optimization scheme, one end, far away from the grouting pipe 11, of the protection iron sheet 14 is provided with a tip 15, and the two tips 15 are mutually abutted to form a conical head. The one end that protection iron sheet 14 kept away from grout pipe 11 sets up pointed end 15, and two pointed ends 15 fold into the conical head, in the grouting hole 2 of being convenient for, pointed end 15 closure also prevents that residues such as soil stone in the grouting hole 2 from getting into between two protection iron sheets 14, prevents that soil stone from propping up protection iron sheet 14 and leading to unable entering karst cave 5.
In a further optimization scheme, in step S3, the grouting hole 2 includes a first hole 21, a second hole 22 and a third hole 23, the first hole 21 is drilled from the excavated tunnel 6 to the lower section direction of the karst cave 5, the second hole 22 is drilled from the excavated tunnel 6 to the upper section of the karst cave 5, and the third hole 23 is located between the first hole 21 and the second hole 22. In this embodiment, grouting and plugging of karst cave is performed for several times, and grouting holes 2 are respectively formed for several times, wherein the first hole 21 is drilled from the face 61 to the lower section of the karst cave 5 along the-110 DEG of the direction of the face 61, and the aperture is 150mm; the second hole 22 is drilled in the same way as the first hole 21, and is drilled from the face 61 to the upper section of the karst cave 5 at 45 degrees along the direction of the face 61; the third hole 23 is drilled in the same way as the first hole 21, and is drilled from the right front of the face 61 to the karst pipeline by 90 degrees along the direction of the face 61; the first hole 21 is drilled and then inserted into the plugging device 1 and grouted, then the second hole 22 is drilled and then inserted into the plugging device 1 and grouted, and finally the third hole 23 is drilled and inserted into the plugging device 1 and grouted.
In a further optimization scheme, in the step S4, grouting the karst cave 5 comprises the following steps:
s4.1: the plugging device 1 extends into the karst cave 5 from the first hole 21 and performs grouting, and a first plugging block 31 is formed in the karst cave 5;
s4.2: the plugging device 1 extends into the karst cave 5 from the second hole 22 and performs grouting, and a second plugging block 32 is formed in the karst cave 5;
s4.3: the plugging device 1 extends into the karst cave 5 from the third hole 23 and performs grouting, and a third plugging block 33 is formed in the karst cave 5;
s4.4: waiting for the first block 31, the second block 32 and the third block 33 to solidify for at least 24 hours. The first blocking block 31 blocks the lower section of the karst cave 5, and the part of the first blocking block 31 exceeds the lower end edge of the face 61; the second blocking block 32 blocks the upper section of the karst cave 5, the edge of the second blocking block 32 exceeds the edge of the upper section of the tunnel face 61, the third blocking block 33 is positioned between the first blocking block 31 and the second blocking block 32, the karst cave 5 is blocked, and the two sides of the blocked length exceed the edge of the tunnel face 61, so that the karst cave 5 is prevented from leaking again due to the fact that the blocked area is penetrated during the later tunneling again; if the diameter of the face 61 is large or the diameter of the karst cave 5 is small, the three blocks 3 are insufficient to block a block length wider than the face 61, and a plurality of third blocks 33 may be disposed between the first blocks 31 and the second blocks 32 as required.
In a further optimization scheme, the water-cement ratio of the slurry injected by the first blocking piece 31 and the second blocking piece 32 is 1:1-0.5:1, and the grouting pressure is 0.3-0 MPa or not higher than 1.2 times of the measured water pressure; the third block 33 is grouted with slurry having a water to ash ratio of 1:1-0.5:1, and the grouting pressure is gradually increased but not more than 1.3 times the measured water pressure at maximum.
In a further optimization scheme, in the step S5, the reinforcing block 4 is positioned in a gap between the plugging block 3 and the karst cave 5, the slurry water-cement ratio of grouting of the reinforcing block 4 is 1:1, and the grouting pressure is from small to large, but the maximum is not more than 1.5MPa. The first block 31, the second block 32 and the third block 33 are solidified for not less than 24 hours after construction, so that the first block 31, the second block 32 and the third block 33 reach enough strength, then the reinforcing holes 24 are drilled into gaps between the blocking blocks 3 and the karst cave 5, then the reinforcing pipes 41 communicated with a grouting machine are inserted into the gaps, grouting is performed to the gaps, the gaps are filled to form the reinforcing blocks 4, and the blocking effect is improved.
Further, the grouting pipe 11 and the reinforcing pipe 41 are disconnected from the grouting machine after grouting, and are left in the stratum structure, and are taken out when the excavation is continued after the detection is correct, so that the influence on tunneling is prevented.
In a further optimization scheme, in the step S6, the water and mud gushing of the karst cave 5 in the inspection process is not more than 3L/min, hole sweeping and screen grouting are performed again for curing, the curing time is not less than 12h, and then tunnel excavation can be continued. And waiting for not less than 48 hours after grouting the reinforcing block 4, fully solidifying the plugging block 3 and the reinforcing block 4, and after detecting that the quantity of the water and the mud of the karst cave 5 meets the tunneling requirement, carrying out hole sweeping and grouting screen slurry for re-grouting for not less than 12 hours until the grouting material for re-grouting is solidified, so that tunnel excavation can be continued.
In the description of the present invention, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
The foregoing embodiments are merely illustrative of the preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, but various modifications and improvements made by those skilled in the art to which the present invention pertains are made without departing from the spirit of the present invention, and all changes and modifications and improvements fall within the scope of the present invention as defined in the appended claims.
Claims (6)
1. A fiber cloth bag grouting and plugging method applied to water burst in karst areas is characterized by comprising the following steps:
s1: detecting a geological state;
s2: manufacturing a plugging device (1); the plugging device (1) comprises a grouting pipe (11), one end of the grouting pipe (11) is fixedly connected and communicated with a fiber cloth bag (12), and the other end of the grouting pipe is communicated with a grouting machine;
s3: drilling a grouting hole (2) towards a karst cave (5) to be plugged, and extending one end of the fabricated plugging device (1) provided with the fiber cloth bag (12) into the karst cave (5);
s4: grouting the karst cave (5), forming a plugging block (3) in the karst cave (5), and plugging the karst cave (5);
s5, grouting gaps among the plugging blocks (3) to form reinforcing blocks (4);
s6: checking the blocking condition of the karst cave (5);
in the step S2, two symmetrically arranged fixed shafts (13) are fixed at one end of the grouting pipe (11) facing the fiber cloth bag (12), a protection iron sheet (14) is rotationally connected to the fixed shafts (13), the two protection iron sheets (14) are symmetrically arranged to form a ring, and the ring is sleeved outside the fiber cloth bag (12);
one end of the protection iron sheet (14) far away from the grouting pipe (11) is provided with a tip (15), and the two tips (15) are mutually abutted to form a conical head.
2. The fiber cloth bag grouting and plugging method applied to water gushing in karst areas according to claim 1, wherein the method comprises the following steps: in step S3, the grouting hole (2) includes a first hole (21), a second hole (22) and a third hole (23), the first hole (21) is drilled from the excavated tunnel (6) to the lower section direction of the karst cave (5), the second hole (22) is drilled from the excavated tunnel (6) to the upper section of the karst cave (5), and the third hole (23) is located between the first hole (21) and the second hole (22).
3. The fiber cloth bag grouting and plugging method applied to water gushing in karst areas according to claim 2, which is characterized in that: in step S4, grouting the karst cave (5) includes the following steps:
s4.1: the plugging device (1) stretches into the karst cave (5) from the first hole (21) and performs grouting, and a first plugging block (31) is formed in the karst cave (5);
s4.2: the plugging device (1) stretches into the karst cave (5) from the second hole (22) and performs grouting, and a second plugging block (32) is formed in the karst cave (5);
s4.3: the plugging device (1) stretches into the karst cave (5) from the third hole (23) and performs grouting, and a third plugging block (33) is formed in the karst cave (5);
s4.4: waiting for the first block (31), the second block (32) and the third block (33) to solidify for at least 24 hours.
4. The fiber cloth bag grouting and plugging method applied to water gushing in karst areas according to claim 3, wherein the method comprises the following steps: the water-cement ratio of the slurry injected by the first blocking piece (31) and the second blocking piece (32) is 1:1-0.5:1, and the grouting pressure is 0.3-1.0 MPa or not higher than 1.2 times of the measured water pressure; the water-cement ratio of the slurry injected by the third blocking piece (33) is 1:1-0.5:1, and the grouting pressure is gradually increased but is not more than 1.3 times of the measured water pressure at maximum.
5. The fiber cloth bag grouting and plugging method applied to water gushing in karst areas according to claim 1, wherein the method comprises the following steps: in the step S5, the reinforcing block (4) is positioned in a gap between the plugging block (3) and the karst cave (5), the slurry water-cement ratio of grouting of the reinforcing block (4) is 1:1, and the grouting pressure is from small to large, but is not more than 1.5MPa at maximum.
6. The fiber cloth bag grouting and plugging method applied to water gushing in karst areas according to claim 1, wherein the method comprises the following steps: in the step S6, the water and mud gushing of the karst cave (5) in the inspection process is not more than 3L/min, hole sweeping and screen grouting are performed again for curing, the curing time is not less than 12h, and then tunnel excavation can be continued.
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| CN111810227A (en) * | 2020-05-27 | 2020-10-23 | 中煤科工集团西安研究院有限公司 | Device and method for filling empty hole type goaf through surface grouting by mold bag method |
| CN112761174A (en) * | 2020-12-30 | 2021-05-07 | 山东正元建设工程有限责任公司 | Grouting plugging method suitable for large karst cave under high-flow-rate flowing water condition |
| CN114658480A (en) * | 2022-04-11 | 2022-06-24 | 徐州中矿岩土技术股份有限公司 | Device and method for blocking gob roadway inclined shaft through mold bag grouting |
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