CN109184745B - Grouting hole device based on small guide pipe grouting and construction method - Google Patents
Grouting hole device based on small guide pipe grouting and construction method Download PDFInfo
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- CN109184745B CN109184745B CN201811155739.4A CN201811155739A CN109184745B CN 109184745 B CN109184745 B CN 109184745B CN 201811155739 A CN201811155739 A CN 201811155739A CN 109184745 B CN109184745 B CN 109184745B
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- 238000010276 construction Methods 0.000 title claims abstract description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 85
- 229910000831 Steel Inorganic materials 0.000 claims description 22
- 238000005553 drilling Methods 0.000 claims description 22
- 239000010959 steel Substances 0.000 claims description 22
- 239000011435 rock Substances 0.000 claims description 16
- 239000002002 slurry Substances 0.000 claims description 13
- 230000005641 tunneling Effects 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 230000001360 synchronised effect Effects 0.000 claims description 2
- 238000007569 slipcasting Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 13
- 238000007789 sealing Methods 0.000 description 8
- 239000004568 cement Substances 0.000 description 7
- 239000003245 coal Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 235000019353 potassium silicate Nutrition 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 4
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000003469 silicate cement Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
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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
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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
- E21D11/003—Linings or provisions thereon, specially adapted for traffic tunnels, e.g. with built-in cleaning devices
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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 provides a grouting hole device based on small duct grouting and a construction method, wherein the grouting hole device comprises s groups of small ducts, the s groups of small ducts are arranged around a roadway, and one end of each s groups of small ducts extends from the inner wall of the roadway to the periphery of the other end; q groups of small catheters are arranged in a staggered mode with the s groups of small catheters, and the length of the q groups of small catheters is larger than that of the s groups of small catheters; the water guide pipe is positioned at the lower part of the left side wall of the roadway, and the opening direction of the water guide pipe faces to the right side wall of the roadway; the invention adopts the small conduit grouting construction method, so that the small conduit grouting is synchronously carried out while the high-pressure deep hole grouting is carried out; meanwhile, the high-pressure deep hole grouting adopts a three-wheel grouting method, and the small guide pipes adopt a grouping interval construction method, so that the water guide fault is effectively treated. The invention shortens the fault treatment period of the water diversion fault, has less engineering quantity, low cost and high accuracy.
Description
Technical Field
The invention belongs to the technical field of full-section grouting of tunnels, and particularly relates to a grouting hole device based on small-conduit grouting and a construction method.
Background
The full section grouting technology of the tunnel is a construction method which is usually adopted in tunnel engineering aiming at abnormal sections with poor soil properties such as excessively weak water-rich stratum, broken bands and the like, and the grouting is carried out on small tunnel surrounding rock construction pipes to play roles in reinforcing soil and preventing water, and at present, a lithology observation contrast method, a test method and the like are usually adopted in field construction, but the methods adopted in the past have the characteristics of large engineering quantity, high cost, low accuracy and the like.
At present, main coal mining of a coal mine mainly adopts a coal seam with pressure, the pressure of the bottom plate of the coal seam bears the Ort ash water is about 1MPa, and the coal seam and the Ort ash waterThe distance is about 40-60 m, and because the water enrichment of the coal bottom plate Orthoash is strong and fault development is carried out, the safety exploitation is threatened by the Orthoash water of the bottom plate, and in recent years, the national coal mine water inrush data show that 70% of water inrush accidents occur in the roadway tunneling process, and the water inrush accidents are particularly easy to occur when the Orthoash water is conducted by the fault in the tunneling process. The prior fault design method mainly comprising the solid bottom plate is adopted to treat the two faults, the treatment period is long, the effect is not ideal, and although the fall of some faults is only 3m, the fault water conductivity is strong, the water yield of the front exploratory drilling hole is high, and the water yield of the top plate of the roadway at the head-on drilling position is 25m 3 And/h, the construction condition is poor, and the Ort layer brings great difficulty to the treatment.
Therefore, it is necessary to provide a parallel construction system and a construction method for comprehensive treatment of water-guiding faults, which are against the defects of the prior art.
Disclosure of Invention
The invention aims to provide a water diversion fault comprehensive treatment parallel construction system and a construction method, which at least solve the problems of long fault construction period, unsatisfactory effect, large engineering quantity, high cost and low accuracy of the conventional fault design method mainly comprising a solid base plate.
In order to achieve the above object, the present invention provides the following technical solutions:
a grouting hole device based on small conduit grouting, the grouting hole device comprising:
the s groups of small guide pipes are arranged around the roadway, and one end of each s group of small guide pipes extends from the inner wall of the roadway to the other end from the periphery;
q groups of small catheters are arranged in a staggered mode with the s groups of small catheters, and the length of the q groups of small catheters is larger than that of the s groups of small catheters;
the water guide pipe is positioned at the lower part of the left side wall of the roadway, and the opening direction of the water guide pipe faces the right side wall of the roadway.
The grouting hole device based on small-catheter grouting, preferably, the s group of small catheters comprise an s1 group of small catheters, an s2 group of small catheters, an s3 group of small catheters, an s4 group of small catheters, an s5 group of small catheters, an s6 group of small catheters, an s7 group of small catheters, an s8 group of small catheters and an s9 group of small catheters; one end of the s1 group of small guide pipes is connected to the left side wall of the roadway, and one end of the s2 group of small guide pipes is connected to the junction of the left side wall of the roadway and the top arch of the roadway; one end of the s5 group of small guide pipes is connected to the junction of the right side of the roadway and the top arch of the roadway; the s3 group small guide pipes and the s4 group small guide pipes are uniformly distributed between the s2 group small guide pipes and the s5 group small guide pipes; one end of the s6 group of small guide pipes is connected to the right side of the roadway; and the s7 group of small guide pipes to the s9 group of small guide pipes are uniformly arranged at the bottom of the roadway.
A grouting hole device based on small conduit grouting as described above, preferably, the q group of small conduits includes q1 group of small conduits, q2 group of small conduits, q3 group of small conduits, q4 group of small conduits, q5 group of small conduits, q6 group of small conduits, q7 group of small conduits, q8 group of small conduits and q9 group of small conduits; one end of the q1 group of small guide pipes is connected to the joint of the left side wall of the roadway and the bottom of the roadway; one end of the q7 group of small guide pipes is connected to the joint of the right side of the roadway and the bottom of the roadway; the q8 group of small guide pipes and the q9 group of small guide pipes are perpendicular to the bottom of the roadway; the q4 group of small guide pipes are connected to the highest point of the arch part of the roadway; the q2 group of small ducts are located between the s1 group of small ducts and the s2 group of small ducts; the q3 group of small ducts are located between the s2 group of small ducts and the s3 group of small ducts; the q5 group of small ducts is located between the s4 group of small ducts and the s5 group of small ducts; the q6 group of small ducts are located between the s5 group of small ducts and the s6 group of small ducts.
According to the grouting hole device based on small-catheter grouting, preferably, the U-shaped shed legs are arranged at the bottom of the roadway, the water guide pipe is connected to the U-shaped shed legs, the right side of the water guide pipe is connected with a section of exposed pipe, the inner diameter of the exposed pipe is the same as that of the water guide pipe, and the right side of the exposed pipe is connected with the flange plate;
preferably, the distance between the water guide pipe and the ground is not smaller than 300mm.
In the grouting hole device based on small-conduit grouting, preferably, the s-group small conduits and the q-group small conduits are all arranged in the surrounding rock in an extending manner in the roadway tunneling direction at an inclined angle of 60-90 degrees.
According to the grouting hole device based on small-conduit grouting, preferably, the s-group small conduits and the q-group small conduits are steel flower pipes with one sealed end, threads are arranged at the other end of each steel flower pipe, and the sealed ends of the steel flower pipes are conical and are used for drilling rock bodies; through holes are formed in the periphery of the steel floral tube and used for discharging slurry.
According to the grouting hole device based on small-catheter grouting, preferably, the right side of the water guide pipe is further connected with the water guide gate valve for controlling the opening and closing of water flow.
A construction method of a grouting hole device based on small conduit grouting, the construction method comprising the following steps:
step one, selecting a small catheter:
synchronous construction is carried out on the small guide pipe when deep hole grouting and drilling are carried out on the roadway, the length of the small guide pipe is not less than 1.5m, the material is a steel flower pipe with the diameter of phi 1 inch, the exposed end of the steel pipe is provided with threads, and the periphery of the steel pipe is provided with uniform through holes;
step two, installing a small catheter:
the two groups of small ducts of the s group of small ducts and the q group of small ducts are constructed in a roadway in a staggered way, and the interval between each group of small ducts is 4m; a. b, driving two groups of 9 holes into surrounding rock at an inclination angle of 60-90 degrees towards the front of tunneling; grouting the small guide pipe after driving the surrounding rock;
step three, installing a water guide pipe:
the water guide pipe is firmly rooted on the U-shaped shed leg, one end of the water guide pipe is exposed out of the U-shaped shed leg, a flange plate is welded at the exposed section, and the ground clearance is not less than 300mm, so that a water control gate valve is arranged.
In the construction method of the grouting hole device based on the small pipe grouting, preferably, in the second step, the grouting pressure is not less than 6MPa during the small pipe grouting.
In the construction method of the grouting hole device based on small conduit grouting, preferably, two water guide pipes are arranged in the third step, and the distance between the two water guide pipes is 800mm.
Compared with the closest prior art, the technical scheme provided by the invention has the following excellent effects:
the invention adopts a method of parallel construction of high-pressure deep hole grouting and small conduit grouting, so that the small conduit grouting is synchronously carried out while the high-pressure deep hole grouting is carried out; meanwhile, the high-pressure deep hole grouting adopts a three-wheel grouting method, and the small guide pipes adopt a grouping interval construction method, so that the water guide fault is effectively treated. The invention shortens the fault period of water diversion fault treatment, and has the advantages of less engineering quantity, low cost and high accuracy.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. Wherein:
FIG. 1 is a diagram of a high pressure grouting hole orifice arrangement in accordance with an embodiment of the present invention;
FIG. 2 is a schematic plan view of a high-pressure grouting hole according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of high pressure grouting Kong Poumian according to an embodiment of the invention;
FIG. 4 is a schematic view of the effect of a first three-wheel grouting section according to an embodiment of the present invention;
FIG. 5 is a schematic illustration of the effect of a second wheel grouting cross section according to an embodiment of the present invention;
FIG. 6 is a schematic diagram showing the overall effect of deep hole grouting and hole distribution in a cross section according to an embodiment of the present invention;
FIG. 7 is a schematic cross-sectional view of a small conduit s-group arrangement in accordance with an embodiment of the present invention;
FIG. 8 is a schematic cross-sectional view of a q-group arrangement of conduits in accordance with an embodiment of the present invention;
FIG. 9 is a schematic view of a planar arrangement of a small catheter in accordance with an embodiment of the present invention;
FIG. 10 is a schematic view of a cross-sectional arrangement of a small catheter in accordance with an embodiment of the present invention;
fig. 11 is a schematic view of a small catheter according to an embodiment of the present invention.
In the figure: 11. a first sleeve; 12. a second sleeve; 13. grouting holes; 14. a first flange; 15. a second flange; 16. a third flange; 17. a pressure gauge; 18. a first gate valve; 19. a short pipe; 110. a second gate valve; 111. a fourth flange; 112. a plug; 21. a first wheel grouting pipe; 22. a second wheel grouting pipe; 23. a third wheel grouting pipe; 31. roadway; 41. a left upper; 42. a right upper; 43. a third gate valve; 44. reinforcing steel bars; 51 threads; 52. a steel floral tube; 53. a tip; 54. a pulp outlet hole; s1, a first group of ducts; s2, a second group of ducts; s3, a third group of ducts; s4, a fourth group of ducts; q1, fifth group of conduits; q2, sixth set of conduits; q3, seventh set of conduits; q4, eighth group of catheters.
Detailed Description
The invention will be described in detail below with reference to the drawings in connection with embodiments. It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other.
In the description of the present invention, the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", etc. refer to the orientation or positional relationship based on that shown in the drawings, merely for convenience of description of the present invention and do not require that the present invention must be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. The terms "coupled" and "connected" as used herein are to be construed broadly and may be, for example, fixedly coupled or detachably coupled; either directly or indirectly through intermediate components, the specific meaning of the terms being understood by those of ordinary skill in the art as the case may be.
According to the embodiment of the invention, as shown in fig. 1, the orifice arrangement diagram of the high-pressure grouting holes 13 is shown, the inner diameter of the first sleeve 11 is 146mm, the length is 5.5m, and the inner diameter of the second sleeve 12 is 108mm. The length is 11m, and the center is a grouting hole 13; the pressure gauge 17 can display the pressure in the pipeline, and the second gate valve 110 can control the water in the pipeline to flow out; the left end of the plug 112 is connected with a fourth flange 111, so that other pipelines can be conveniently connected externally. As shown in fig. 2 to 6, which are schematic diagrams of the end face of the high-pressure grouting hole 13 according to the present invention, the arrangement of the openings of the high-pressure grouting holes 13 is divided into three wheels, namely, a first-wheel grouting pipe 21, a second-wheel grouting pipe 22 and a third-wheel grouting pipe 23, the arrangement of the first-wheel grouting pipe 21 and the third-wheel grouting pipe 23 is the same, and the arrangement of the second-wheel grouting pipe 22 is different from the arrangement of the first-wheel grouting pipe 21 and the third-wheel grouting pipe 23. This arrangement ensures that the strength of the tunnel 31 is ensured during the driving process. And the damage caused by the water guide fault is prevented. As shown in fig. 7-11, the grouting end face of the small conduit is schematically shown, the grouting of the small conduit is divided into two groups s and q, and each large group is divided into 9 small groups, namely a first group of conduits s1; a second set of conduits s2; a third set of conduits s3; a fourth set of conduits s4; a fifth set of conduits q1; a sixth set of conduits q2; a seventh set of conduits q3; an eighth set of conduits q4; the ninth group of the guide pipes q5, s and q are arranged at intervals, so that the coverage area is wider, and the effect is more obvious. Meanwhile, the bottom of the roadway is provided with a reinforcing steel bar 44 for supporting, the front end of the small guide pipe is provided with a tip 53, the small guide pipe is conveniently inserted into a rock mass, and slurry outlets 54 are formed around the small guide pipe.
According to the specific embodiment of the invention, the parallel construction system for comprehensive treatment of the water diversion fault comprises a high-pressure deep hole grouting system which is positioned in a rock mass around the outer side of the roadway 31. The high-pressure deep hole grouting system comprises a high-pressure deep hole grouting hole 13 device, wherein the high-pressure deep hole grouting hole 13 device comprises a first sleeve 11, and the first sleeve 11 is arranged in a rock stratum around a roadway 31. For providing positioning and support.
And the small-conduit grouting system is positioned at the inner side of the high-pressure deep hole grouting system and is connected to the inner wall of the roadway 31.
According to an embodiment of the present invention, the high-pressure deep hole grouting hole 13 device further comprises a second sleeve 12, wherein the outer diameter of the second sleeve 12 is smaller than the inner diameter of the first sleeve 11. The second sleeve 12 is concentrically arranged in the first sleeve 11, and grouting holes 13 are arranged in the second sleeve 12. A short tube 19, the short tube 19 is connected to the left side of the second sleeve 12, and a pressure gauge 17 is arranged on the short tube 19. The plug 112, the plug 112 connects in the left side of the nozzle stub 19, is equipped with the spherical cavity in the plug 112, is equipped with the second gate valve 110 in the spherical cavity.
According to an embodiment of the invention, the length of the second sleeve 12 is greater than the length of the first sleeve 11, and the left ends of the first sleeve 11 and the second sleeve 12 are arranged flush. Mortar layers with the same thickness are arranged between the first sleeve 11 and the second sleeve 12 and between the second sleeve 12 and the grouting holes 13. The first sleeve 11 and the second sleeve 12 are uniformly distributed with a plurality of through holes along the circumferential direction for slurry to flow out from the sleeve to form a sealed whole.
According to the embodiment of the invention, the left end of the first sleeve 11 is connected with a first flange 14, the left end of the second sleeve 12 is connected with a second flange 15, and the right end of the short tube 19 is connected with a third flange 16. The first flange 14, the second flange 15 and the third flange 16 are closely connected together. The second flange 15 is located between the first flange 14 and the third flange 16. The outer wall of the short pipe 19 is communicated with a pressure measuring pipe, a first gate valve 18 is arranged in the pressure measuring pipe, and the upper end of the pressure measuring pipe is connected with a pressure gauge 17. The first gate valve 18 is used to communicate the pressure gauge 17 with the short pipe 19.
Preferably, the inner diameter of the short tube 19 is the same as the inner diameter of the second sleeve 12.
According to an embodiment of the present invention, the grouting holes 13 have three groups, namely, a first group of grouting holes, a second group of grouting holes and a third group of grouting holes. Each group of grouting holes 13 are uniformly distributed along the periphery of the construction roadway 31, and the distribution mode of the first group of grouting holes is the same as that of the third group of grouting holes and is different from that of the second group of grouting holes.
Preferably, the included angles of the first set of grouting holes and the third set of grouting holes and the central line of the roadway 31 are 11-25 degrees (such as 11 degrees, 12 degrees, 13 degrees, 14 degrees, 15 degrees, 18 degrees, 20 degrees, 22 degrees and 25 degrees), and the hole depths are 43-56 m (such as 43m, 45m, 46m, 48m, 49m, 52m, 53m, 55m and 56 m).
Still more preferably, the included angle between the second set of grouting holes 13 and the central line of the roadway 31 is 15-22 ° (such as 15 °, 16 °, 17 °, 18 °, 19 °, 20 °, 21 °, 22 °) and the hole depth is 57-62 m (such as 57m, 58m, 59 m, 60m, 61 m, 62 m).
According to an embodiment of the present invention, a small-conduit grouting system includes a small-conduit grouting hole device, the small-conduit grouting hole device includes,
the s groups of small guide pipes are arranged around the roadway 31, and one ends of the s groups of small guide pipes extend from the inner wall of the roadway 31 to the periphery to the other ends.
q group's small ducts, q group's small ducts and s group's small ducts are arranged at intervals, and the length of q group's small ducts is greater than the length of s group's small ducts.
The water guide pipe is positioned at the lower part of the left side wall 41 of the roadway 31, and the opening direction of the water guide pipe faces the right side wall 42 of the roadway 31.
According to a specific embodiment of the present invention, the s group of small ducts includes s1 group of small ducts, s2 group of small ducts, s3 group of small ducts, s4 group of small ducts, s5 group of small ducts, s6 group of small ducts, s7 group of small ducts, s8 group of small ducts, and s9 group of small ducts. One end of the s1 group of small ducts is connected to the left side wall 41 of the roadway 31, and one end of the s2 group of small ducts is connected to the junction of the left side wall 41 of the roadway 31 and the top arch of the roadway 31. One end of the s5 group of small guide pipes is connected at the junction of the right side 42 of the roadway 31 and the top arch of the roadway 31. The group s3 small ducts and the group s4 small ducts are uniformly distributed between the group s2 small ducts and the group s5 small ducts. One end of the s6 group of small guide pipes is connected to the right side 42 of the roadway 31. The s7 group of small guide pipes to the s9 group of small guide pipes are uniformly arranged at the bottom of the roadway 31.
The q group of small ducts comprise a q1 group of small ducts, a q2 group of small ducts, a q3 group of small ducts, a q4 group of small ducts, a q5 group of small ducts, a q6 group of small ducts, a q7 group of small ducts, a q8 group of small ducts and a q9 group of small ducts. One end of the q1 group of small guide pipes is connected at the junction of the left side wall 41 of the roadway 31 and the bottom of the roadway 31. One end of the q7 group of small guide pipes is connected at the junction of the right side 42 of the roadway 31 and the bottom of the roadway 31. The q8 group of small ducts and the q9 group of small ducts are arranged perpendicular to the bottom of the tunnel 31. The q4 group of small ducts are connected at the highest point of the arch of the roadway 31. The q2 group of small ducts are located between the s1 group of small ducts and the s2 group of small ducts. The q3 group of small ducts are located between the s2 group of small ducts and the s3 group of small ducts. The q5 group of small ducts are located between the s4 group of small ducts and the s5 group of small ducts. The q6 group of small ducts are located between the s5 group of small ducts and the s6 group of small ducts.
The aqueduct is connected on U-shaped canopy leg, and the aqueduct right side is connected with one section and exposes the pipe, exposes the pipe and the internal diameter of aqueduct the same, exposes the right side of pipe and is connected with the ring flange.
The s group of small guide pipes and the q group of small guide pipes are arranged in surrounding rock in an extending way in the tunneling direction of the roadway 31 at an inclined angle of 60-90 degrees.
The s group of small guide pipes and the q group of small guide pipes are steel flower pipes 52 with one sealed end, threads 51 are arranged at the other end of the steel flower pipes 52, and the sealed ends of the steel flower pipes 52 are conical and are used for drilling rock. Through holes are formed around the steel flowtube 52 for slurry discharge.
The right side of the water guide pipe is also connected with a water guide gate valve for controlling the opening and closing of water flow.
Preferably, the distance between the water guide pipe and the ground is not less than 300mm.
The construction method of the parallel construction system for the comprehensive treatment of the water diversion fault comprises the following steps:
step 1, high-pressure deep hole grouting:
step 11, determining a drilling construction process program:
drilling the drilling tool, putting the drilling tool into the first sleeve 11, injecting double-liquid slurry for sealing, drilling the drilling tool after the pressure test is qualified, putting the drilling tool into the second sleeve 12, injecting double-liquid slurry for sealing, drilling the drilling tool to the designed depth after the pressure test is qualified, and observing the water quantity, water pressure and water temperature of the final hole of the water outlet drilling.
Step 12, the first sleeve 11 and the second sleeve 12 are put in and fixed:
adopting a phi 168mm drill bit to drill for 6m, putting the first sleeve 11 into the drill bit, injecting a quick setting expansion hole sealing agent for sealing, and the cement slurry cement ratio is 1:1, cement paste and water glass volume ratio 1:0.6.
drilling by adopting a phi 127mm drill bit for 12m, putting a second sleeve 12, injecting double-slurry for sealing, wherein the cement slurry cement ratio is 1:1, cement paste and water glass volume ratio 1:0.6.
step 13, water stop inspection:
after the first sleeve 11 and the second sleeve 12 in the step 12 are sealed for 8 hours, a high-pressure slurry pump is used for carrying out quality inspection on the bearing water stop of the first sleeve 11 and the second sleeve, water is injected into the first sleeve 11, the pressure of the orifice reaches 3Mpa, the stability is carried out for 30 minutes, the orifice and the periphery are not qualified, and otherwise, grouting and sealing are carried out again until the quality is qualified. And injecting water into the second sleeve 12, stabilizing the pressure of the orifice for 30 minutes under 5Mpa, and if the orifice and the periphery are qualified without water leakage, re-grouting and sealing until the orifice and the periphery are qualified. And after the second sleeve 12 is checked to be qualified in water stop, a 108mm high-pressure water-control gate valve is installed, and a phi 75mm drill bit is used for drilling to the depth of a designed hole.
Step 2, grouting a small catheter:
step 21, selecting a small catheter:
the small guide pipe is synchronously constructed when deep holes are formed in the roadway 31 in grouting and drilling, the small guide pipe is not smaller than 1.5m and made of phi 1 inch steel floral tube 52, the exposed end of the steel tube is provided with threads 51, and the periphery of the steel tube is provided with uniform through holes.
Step 22, installing a small catheter:
the two groups of small ducts of the s groups of small ducts and the q groups of small ducts are constructed in the roadway 31 in a staggered mode, the interval between each group is 4m, the number of groups can be arranged according to the actual condition of the site, and the number of the arranged groups generally covers the whole construction area. a. And b, driving the two groups of 9 holes into surrounding rock at an inclination angle of 60-90 degrees towards the front of tunneling. After driving into the surrounding rock, the small guide pipe can be grouted.
Step 23, installing a water guide pipe:
the water guide pipe is firmly rooted on the U-shaped shed leg, so that the water guide pipe is exposed for 200mm, a flange plate is required to be welded on the exposed section, and the ground clearance is not less than 300mm, so that a water control gate valve is arranged. The installation of the water conduit is not limited to the design position, and is arranged according to the actual water outlet position.
Step 3, high-pressure deep hole grouting and small conduit grouting are performed in parallel:
and the grouting construction of the small guide pipe is simultaneously carried out at the same time of grouting the high-pressure deep hole.
According to the specific embodiment of the invention, in the step 11, the volume ratio of cement slurry to water glass in the double slurry is 1:1-1:0.6.
In the step 12, the grouting reinforcement material for sealing is P.O42.5 silicate cement, water and water glass with the Baume degree of 35-40.
In step 12, the final grouting pressure is 9MPa.
According to an embodiment of the present invention, in step 22, the grouting pressure is not less than 6MPa during the grouting of the small pipe.
There are two water guide pipes in step 23, and the distance between the two water guide pipes is 800mm.
According to the specific embodiment of the invention, the invention carries out the checking calculation of the treatment range according to the geology and hydrogeology parameters of the Tang-nationality mine, the checking calculation of the treatment range is as follows, the safe water-resisting layer thickness calculation formula and the safe water pressure calculation formula of the bottom plate water-resisting layer of the tunneling tunnel 31 aim at the geology and hydrogeology parameters of the Tang-nationality mine and the tunnel 31 design parameters, and the values are calculated as follows:
the thickness calculation formula of the safe water-resisting layer comprises the following steps:
wherein the thickness of the t-safe water-resisting layer is m;
l-roadway 31 floor width, l=5.5 m;
average weight of gamma-floor water barrier, gamma = 0.025MN/m 3 ；
K p Average tensile strength of the water-barrier layer of the base plate, K p ＝1.0MPa；
The water-barrier of the p-bottom plate is subjected to a head pressure, p=1.1 MPa.
Calculated t=4.05m.
Safe water pressure of waterproof layer of 31 bottom plate of tunneling roadway
Wherein, the p-bottom plate water-resisting layer can bear safe water pressure and MPa;
t-thickness of the water-barrier layer, t=12m;
l-lane 31 width, l=5.5m;
average gravity of gamma-floor water barrier layer, 0.025MN/m 3 ；
K p Average tensile strength of the water-barrier layer of the base plate, K p ＝1.0MPa
Calculated p=9.82 MPa.
When a reinforcing range of 12m of the periphery of the roadway 31 is defined, the thickness of the minimum water-resisting layer between the bottom plate of the roadway 31 and the Orthoash is about 12m and is far greater than the thickness of the safety water-resisting layer by 4.05m; the maximum hydraulic pressure of the Orthoash on the working face is 1.1MPa, which is far smaller than the safety hydraulic pressure of 9.82MPa, so that the defined treatment range is reasonable.
Meanwhile, the invention also provides a drilling construction parameter table, as shown in the following table 1:
table 1 drilling construction parameter table
In a word, the invention adopts a method of parallel construction of high-pressure deep hole grouting and small conduit grouting, so that the small conduit grouting is synchronously carried out while the high-pressure deep hole grouting is carried out; meanwhile, the high-pressure deep hole grouting adopts a three-wheel grouting method, and the small guide pipes adopt a grouping staggered construction method, so that the water guide fault is effectively treated. The method shortens the fault treatment period of the water diversion fault, has less engineering quantity, low cost and high accuracy.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. Grouting hole device based on little pipe slip casting, characterized in that, the grouting hole device includes:
the s-group small ducts are arranged around the roadway, one end of each s-group small duct extends from the inner wall of the roadway to the other end, and each s-group small duct comprises an s 1-group small duct, an s 2-group small duct, an s 3-group small duct, an s 4-group small duct, an s 5-group small duct, an s 6-group small duct, an s 7-group small duct, an s 8-group small duct and an s 9-group small duct; one end of the s1 group of small guide pipes is connected to the left side wall of the roadway, and one end of the s2 group of small guide pipes is connected to the junction of the left side wall of the roadway and the top arch of the roadway; one end of the s5 group of small guide pipes is connected to the junction of the right side of the roadway and the top arch of the roadway; the s3 group small guide pipes and the s4 group small guide pipes are uniformly distributed between the s2 group small guide pipes and the s5 group small guide pipes; one end of the s6 group of small guide pipes is connected to the right side of the roadway; the s7 group of small guide pipes to the s9 group of small guide pipes are uniformly arranged at the bottom of the roadway;
the q group of small catheters are arranged in a staggered manner with the s group of small catheters, the length of the q group of small catheters is larger than that of the s group of small catheters, and the q group of small catheters comprises a q1 group of small catheters, a q2 group of small catheters, a q3 group of small catheters, a q4 group of small catheters, a q5 group of small catheters, a q6 group of small catheters, a q7 group of small catheters, a q8 group of small catheters and a q9 group of small catheters; one end of the q1 group of small guide pipes is connected to the joint of the left side wall of the roadway and the bottom of the roadway; one end of the q7 group of small guide pipes is connected to the joint of the right side of the roadway and the bottom of the roadway; the q8 group of small guide pipes and the q9 group of small guide pipes are perpendicular to the bottom of the roadway; the q4 group of small guide pipes are connected to the highest point of the arch part of the roadway; the q2 group of small ducts are located between the s1 group of small ducts and the s2 group of small ducts; the q3 group of small ducts are located between the s2 group of small ducts and the s3 group of small ducts; the q5 group of small ducts is located between the s4 group of small ducts and the s5 group of small ducts; the q6 group of small ducts are located between the s5 group of small ducts and the s6 group of small ducts;
the water guide pipe is positioned at the lower part of the left side wall of the roadway, the opening direction of the water guide pipe faces the right side wall of the roadway, a U-shaped shed leg is arranged at the bottom of the roadway, the water guide pipe is connected to the U-shaped shed leg, the right side of the water guide pipe is connected with a section of exposed pipe, the exposed pipe is identical to the inner diameter of the water guide pipe, and the right side of the exposed pipe is connected with a flange plate.
2. A small pipe grouting-based grouting hole device according to claim 1, wherein the distance between the water guide pipe and the ground is not less than 300mm.
3. The grouting hole device based on small-conduit grouting as claimed in claim 1, wherein the s-group small conduits and the q-group small conduits are arranged in surrounding rock in a manner of extending towards the tunneling direction at an inclination angle of 60-90 degrees.
4. The grouting hole device based on small conduit grouting as claimed in claim 1, wherein the s group of small conduits and the q group of small conduits are steel flowtubes with one sealed end, the other ends of the steel flowtubes are provided with threads, and the sealed ends of the steel flowtubes are conical and are used for drilling rock mass; through holes are formed in the periphery of the steel floral tube and used for discharging slurry.
5. The grouting hole device based on small-catheter grouting as claimed in claim 1, wherein the right side of the water guide pipe is also connected with a water guide gate valve for controlling the opening and closing of water flow.
6. A construction method of the grouting hole device based on small pipe grouting according to any one of claims 1 to 5, characterized in that the construction method comprises the following steps:
step one, selecting a small catheter:
synchronous construction is carried out on the small guide pipe when deep hole grouting and drilling are carried out on the roadway, the length of the small guide pipe is not less than 1.5m, the material is a steel flower pipe with the diameter of phi 1 inch, the exposed end of the steel flower pipe is provided with threads, and the periphery of the steel flower pipe is provided with uniform through holes;
step two, installing a small catheter:
the two groups of small ducts of the s group of small ducts and the q group of small ducts are constructed in a roadway in a staggered way, and the interval between each group of small ducts is 4m; s and q groups of 9 holes are respectively driven into surrounding rock at an inclination angle of 60-90 degrees towards the front of tunneling; grouting the small guide pipe after driving the surrounding rock;
step three, installing a water guide pipe:
the water guide pipe is firmly rooted on the U-shaped shed leg, one end of the water guide pipe is exposed out of the U-shaped shed leg, a flange plate is welded at the exposed section, and the ground clearance is not less than 300mm, so that a water control gate valve is arranged.
7. The construction method of a small pipe grouting hole device according to claim 6, wherein in the second step, the grouting pressure is not less than 6MPa during small pipe grouting.
8. The construction method of grouting hole device based on small pipe grouting according to claim 6, wherein the number of the water guide pipes in the third step is two, and the distance between the two water guide pipes is 800mm.
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| CN101864967A (en) * | 2010-06-13 | 2010-10-20 | 中国矿业大学 | Strengthening and reinforcing method of high-ground-pressure soft rock laneway by hierarchical grouting |
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