CN113175334A - Drilling and grouting integrated grouting reinforcement construction method for tunnel - Google Patents
Drilling and grouting integrated grouting reinforcement construction method for tunnel Download PDFInfo
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- CN113175334A CN113175334A CN202110470802.9A CN202110470802A CN113175334A CN 113175334 A CN113175334 A CN 113175334A CN 202110470802 A CN202110470802 A CN 202110470802A CN 113175334 A CN113175334 A CN 113175334A
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- 238000005553 drilling Methods 0.000 title claims abstract description 73
- 238000010276 construction Methods 0.000 title claims abstract description 32
- 230000002787 reinforcement Effects 0.000 title claims abstract description 23
- 229910003460 diamond Inorganic materials 0.000 claims abstract description 78
- 239000010432 diamond Substances 0.000 claims abstract description 78
- 238000005520 cutting process Methods 0.000 claims abstract description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 31
- 230000000694 effects Effects 0.000 claims abstract description 28
- 239000002002 slurry Substances 0.000 claims abstract description 28
- 238000007689 inspection Methods 0.000 claims abstract description 7
- 238000009826 distribution Methods 0.000 claims abstract description 4
- 239000011440 grout Substances 0.000 claims description 51
- 238000000034 method Methods 0.000 claims description 7
- 238000009792 diffusion process Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 2
- 239000007788 liquid Substances 0.000 abstract description 36
- 238000005259 measurement Methods 0.000 abstract description 3
- 239000012535 impurity Substances 0.000 description 8
- 238000007569 slipcasting Methods 0.000 description 7
- 238000007789 sealing Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000001223 reverse osmosis Methods 0.000 description 4
- 239000011435 rock Substances 0.000 description 4
- 238000010008 shearing Methods 0.000 description 4
- 239000002689 soil Substances 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000008234 soft water Substances 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- BGOFCVIGEYGEOF-UJPOAAIJSA-N helicin Chemical compound O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@H]1OC1=CC=CC=C1C=O BGOFCVIGEYGEOF-UJPOAAIJSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/42—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
- E21B10/43—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits characterised by the arrangement of teeth or other cutting elements
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
- E21B10/54—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/10—Making by using boring or cutting machines
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The application relates to a tunnel drilling and grouting integrated grouting reinforcement construction method, which comprises hole distribution measurement, a grouting wall, drilling operation, grouting operation and grouting effect inspection, wherein the drilling operation and the grouting operation are carried out through a drilling and grouting integrated device, the drilling and grouting integrated device comprises a drilling machine, a drilling rod, a connecting pipe, a drill bit, a slurry inlet pipe and a water inlet pipe, the drilling rod is connected with the drill bit through the connecting pipe, a plurality of diamond tool bits are arranged at the port of the connecting pipe, one end of each diamond tool bit is integrally connected, the other end of each diamond tool bit is connected to the pipe orifice of the connecting pipe, a communicating gap is formed between every two adjacent diamond tool bits, when the connecting pipe is connected with the drill bit, each diamond tool bit is arranged in the slurry outlet of the drill bit, and the cutting surface formed by each diamond tool bit is lower than the cutting surface of the drill bit; a check valve is arranged in the connecting pipe. This application has the effect of improving the easy problem of blockking up of thick liquid mouth.
Description
Technical Field
The application relates to the technical field of tunnel construction, in particular to a tunnel drilling and grouting integrated grouting reinforcement construction method.
Background
Underground tunnel traffic engineering is an important traffic junction for urban traffic. When the underground tunnel traffic engineering construction is carried out, the construction safety is endangered due to the fact that soft water-rich strata are frequently encountered, and when the tunnel construction is carried out on the soft water-rich strata, the situations of surrounding rock collapse, deformation instability and tunnel water burst and mud burst easily occur, and therefore the soil layer is generally required to be grouted and reinforced before the tunnel construction excavation.
In the related art, a grouting reinforcement construction method specifically comprises the following steps: firstly, arranging grouting holes according to a measurement drawing, then constructing a grout stop wall, mounting a hole pipe on the grout stop wall, and drilling according to the hole depth requirement by using the hole pipe, wherein a hollow drill rod is adopted during drilling, and a drill bit of the hollow drill rod is provided with a grout outlet; after the drilling operation is finished, performing grout stop sealing treatment on the hollow drill rod at the orifice pipe, then directly grouting the hole through the hollow drill rod, removing the grout stop sealing after grouting, withdrawing one section of the hollow drill rod from the hole and removing, then performing grout stop sealing on the hollow drill rod at the orifice pipe again, performing grouting again, and performing multi-section circulation operation until the whole hollow drill rod is completely withdrawn, so that the grouting operation is finished; and (4) after grouting operation is finished, grouting effect inspection is carried out, and full-face excavation construction can be carried out when the grouting effect meets the requirement.
In view of the above-mentioned related technologies, the inventor believes that when grouting is performed through a hollow drill rod, since the grout outlet is formed in the drill bit, impurities such as crushed stones generated during drilling operation easily block the grout outlet, which is not beneficial to outputting and injecting grout in the hole, and further affects grouting operation efficiency and grouting effect.
Disclosure of Invention
In order to improve the problem that grout outlet is easy to block up, the application provides a tunnel drilling and grouting integrated grouting reinforcement construction method.
The application provides a tunnel drilling and grouting integrated grouting reinforcement construction method, adopts following technical scheme:
a tunnel drilling and grouting integrated grouting reinforcement construction method comprises the steps of hole distribution measurement, grouting wall construction, drilling operation, grouting operation and grouting effect inspection, wherein the drilling operation and the grouting operation are carried out through a drilling and grouting integrated device, the drilling and grouting integrated device comprises a drill rod, a connecting pipe and a drill bit, the drill rod is connected with the drill bit through the connecting pipe, the drill rod is provided with a hollow through groove, and the drill bit is provided with a grout outlet; a plurality of diamond tool bits are arranged on one end opening, away from the drill rod, of the connecting pipe, the diamond tool bits are distributed along the circumferential direction of the connecting pipe, a cutting face formed by each diamond tool bit protrudes out of the pipe opening of the connecting pipe, a communicating gap is formed between every two adjacent diamond tool bits, when the connecting pipe is connected with the drill bit, each diamond tool bit is arranged in a slurry outlet of the drill bit, and the cutting face formed by each diamond tool bit is lower than the cutting face of the drill bit; a check valve is arranged in the connecting pipe.
Through adopting above-mentioned technical scheme, connect through the connecting pipe between drilling rod and the drill bit, diamond tool bit has been set up on the connecting pipe, and during the connection, diamond tool bit arranges the play thick liquid mouth of drill bit in, diamond tool bit's cutting face is less than the cutting face of drill bit, make the brill surface of exerting of drill bit present the level form cutting face, debris such as detritus that the drill bit produced when carrying out the drilling operation once get into out the thick liquid mouth, can be carried out the regrinding by a thick liquid mouth, combine rivers flushing action, debris are taken away from by a thick liquid mouth rapidly, the play thick liquid mouth can not blockked up by debris, the easy problem of blockking up of a thick liquid mouth has been improved. Moreover, the non-return anti-blocking structure is arranged in a connecting pipe connection mode, so that the function of the existing device can be improved in a mode of directly additionally connecting through the connecting pipe under the condition of adopting the existing drill bit and the existing drill rod, and the change cost of the existing device is reduced. Finally, the pipe orifice department of connecting pipe is located to the diamond segments, arrange the play thick liquid of drill bit in, the thick liquid flows out by a play thick liquid mouth again through the intercommunication clearance of diamond segments of flowing through behind the connecting pipe, and the drilling rod keeps rotatoryly at the slip casting in-process, and diamond segments can carry out rotatory shearing action to the thick liquid in the intercommunication clearance of diamond segments of flowing through this moment, can reduce the serous material granularity, promote the permeability of thick liquid to promote slip casting and consolidate the effect.
Optionally, a plurality of diamond blades are arranged between adjacent diamond blades, one end of each diamond blade is connected with the common connection end of the diamond blade, the other end of each diamond blade is connected with the pipe orifice of the connection pipe, a slurry outlet gap is formed between the adjacent diamond blades, and the cutting surface formed by each diamond blade is lower than the cutting surface of the diamond blade.
Through adopting above-mentioned technical scheme, diamond blade's cutting face is less than diamond segments, and diamond segments's cutting face is less than the drill bit, and based on this, form three-layer cutting structure toward the mud outlet direction from the direction of drilling on the drill bit in proper order, the cutting structure of decrement formula makes debris such as clastic rock that the in-process of drilling produced can be by multi-level breakage, reduces the debris granule, promotes rivers edulcoration effect, reduces the possibility of piling up of debris at the mud outlet.
Optionally, the cutting surface of each diamond blade is gradually changed from high to low to high along the circumferential direction of the connecting pipe.
By adopting the technical scheme, the cutting surface with the gradually changed diamond blade improves the cutting level of the cutting surface, improves the multi-level and multi-directional crushing effect on sundries, and reduces the possibility of sundry blockage.
Optionally, the blade face of the diamond blade is twisted in a spiral shape.
Through adopting above-mentioned technical scheme, when the play thick liquid clearance of diamond blade is flowed through to the thick liquid, the effect of water conservancy diversion also can be played to the thick liquid to spiral helicine knife face for thick liquid flows out along spiral knife face whirl, promotes the play thick liquid speed of thick liquid, promotes thick liquid play thick liquid pressure.
Optionally, the check valve is including locating the apron that dams in the connecting tube, set up the perforation that runs through the face on the apron that dams, the apron that dams is equipped with the sheet rubber in keeping away from the one side of drilling rod, the sheet rubber covers the face of apron that dams, the centre of a circle department of sheet rubber is fixed in through the screw on the apron that dams, and the sheet rubber is located the below of diamond segments, has the interval that supplies the sheet rubber deformation between sheet rubber and the diamond segments.
By adopting the technical scheme, the interception cover plate and the rubber sheet are arranged in the connecting pipe, the circle center of the rubber sheet is fixed by a screw, when water or grout enters the connecting pipe through the drill rod and flows through the through hole on the closure cover plate, the water or grout can push the rubber sheet to shrink and deform towards the grout outlet by taking the screw as the center, so that the rubber sheet can not cover the through hole, the through hole is opened, water or slurry can penetrate out of the through hole and flow out of the slurry outlet of the drill bit, when water, liquid or impurities and the like want to flow back from the slurry outlet to the drill pipe, because the rubber sheet is covered on the closure cover plate, the support function of the closure cover plate ensures that the rubber sheet keeps the unfolded state and can not be reversely contracted, therefore, the backflow is not successful, the effect of stopping the flow is realized, the smoothness of the hollow through groove of the drill rod is ensured, and the situation of sundries backflow blockage is reduced.
Optionally, the apron that dams is close to the one side epirelief of drilling rod and is equipped with a plurality of guide plates, the guide plate is arc form guide plate, on the position between the adjacent perforation was located to the guide plate, the one end of guide plate was towards the centre of a circle department of the apron that dams, and the other end of guide plate is towards the circumference department of the apron that dams, and each guide plate constitutes the water conservancy diversion structure of the radial outward diffusion of apron centre of a circle department by the apron that dams.
Through adopting above-mentioned technical scheme, through the guide plate structure, the thick liquid can be radially dispersed rapidly and export, promotes thick liquid output efficiency.
Optionally, the drill rod includes an inner tube and an outer tube sleeved outside the inner tube, a vent groove is formed between the inner tube and the outer tube, vent holes are formed in the circumferential wall of the inner tube, and an air inlet pipe is communicated with the outer tube.
Through adopting above-mentioned technical scheme, adopt the bushing structure of interior outer tube, the thick liquid carries out the slip casting through the inner tube, intake pipe pipeline can be opened at the slip casting in-process, make the air duct between outer tube and the inner tube let in gas, make gas pressure be greater than the delivery pressure of the interior intraductal thick liquid of inner tube, gas can get into the inner tube through the air vent, gas can form the gas layer on the pipe wall of inner tube, reduce the friction of inner tube pipe wall, reduce the delay of thick liquid on the inner tube pipe wall, promote the play thick liquid speed of thick liquid, gaseous letting in has increased slip casting pressure simultaneously, can promote the infiltration reinforcement effect of thick liquid to the soil layer. Similarly, when water flow is introduced into the inner pipe to wash drilling impurities, the air flow is injected into the water pressure to increase the water pressure, so that the impurity washing and removing effects can be improved.
Optionally, the aperture of the vent hole on the side of the inner circumference of the inner tube is smaller than the aperture of the vent hole on the side of the outer circumference of the inner tube.
By adopting the technical scheme, the inner side caliber of the vent hole is smaller than the outer side caliber, the osmotic pressure requirement of the inner side caliber is higher than that of the outer side caliber, and the possibility of reverse osmosis of the slurry in the inner pipe through the vent hole can be reduced.
Optionally, the vent hole is a conical air hole, and a thread is arranged on the circumferential inner wall of the vent hole.
Through adopting above-mentioned technical scheme, the screw thread design makes gas be spiral flow through the screw thread water conservancy diversion and permeates to the inner tube, promotes the gas injection effect.
Alternatively, the vent holes are formed in the inner circumferential side surface of the inner tube so that the vent holes are deflected toward the drill bit.
Through adopting above-mentioned technical scheme, the drill bit is faced in the drill hole, and the injection direction of gas is faced the drill bit, promotes the efficiency that the thick liquid was carried toward the drill bit direction, and simultaneously, the drill hole is faced towards the drill bit and is complied with thick liquid direction of delivery, and the thick liquid is difficult to carry out reverse osmosis from the drill hole department, reduces thick liquid reverse osmosis probably.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the drill bit is provided with a multi-layer cutting layer structure through the connecting pipe structure, so that the broken rock sundries can be cut and crushed in a multi-layer manner, and the problem that a slurry outlet of the drill bit is easy to block is solved; meanwhile, the shearing effect of the slurry is improved, the granularity of the slurry is reduced, and the penetration and reinforcement effects of the slurry are improved;
2. the reverse-flow-stopping structure is adopted, and the reverse seepage phenomenon of the slurry is reduced;
3. increase airflow channel, reduce the inner tube thick liquid and be detained, promote slip casting pressure, promote the thick liquid infiltration and consolidate the effect.
Drawings
Fig. 1 is a schematic flow chart of example 1 of the present application.
Fig. 2 is a schematic construction structure diagram of S2 in embodiment 1 of the present application.
Fig. 3 is a schematic construction structure diagram of S3 in embodiment 1 of the present application.
Fig. 4 is an exploded view of the drill rod, the connecting pipe and the drill bit in embodiment 1 of the present application.
FIG. 5 is a schematic view of the structural components of the drill rod, the connecting pipe and the drill bit in the embodiment 1 of the present application.
Fig. 6 is a schematic sectional view of a-a in fig. 5.
Fig. 7 is a schematic construction structure diagram of S4 in embodiment 1 of the present application.
FIG. 8 is a schematic view of the structural components of the drill rod, the connecting pipe and the drill bit in the embodiment 2 of the present application.
Description of reference numerals: 1. a soil layer; 2. a grout stopping wall; 3. an orifice tube; 4. a drilling machine; 5. a drill stem; 51. an inner tube; 52. an outer tube; 53. a vent hole; 54. a hollow through groove; 55. a vent channel; 6. a connecting pipe; 61. a closure cover plate; 62. perforating; 63. a rubber sheet; 64. a baffle; 65. a diamond tool bit; 66. a diamond blade; 7. a drill bit; 8. a pulp inlet pipe; 9. a water inlet pipe; 10. an air inlet pipe; 11. a gas release valve; 12. a grout stopping plug; 13. stop the thick liquid connection pad.
Detailed Description
The present application is described in further detail below with reference to figures 1-8.
The embodiment of the application discloses a tunnel drilling and grouting integrated grouting reinforcement construction method.
Example 1
Referring to fig. 1, a tunnel drilling and grouting integrated grouting reinforcement construction method includes the following steps:
and S1, measuring and arranging holes, measuring and positioning the grouting holes according to a design drawing, and hanging plate numbers.
S2, referring to fig. 2, constructing a grout stop wall 2, constructing the grout stop wall 2 before a soil layer 1 needing construction, embedding an orifice pipe 3 while constructing the grout stop wall 2, wherein the exposed end of the orifice pipe 3 extends out of the grout stop wall by 20 cm, and a connecting flange is arranged on the orifice of the orifice pipe 3.
S3, referring to fig. 3, drilling work is performed by the drilling and grouting integrated device.
Referring to fig. 3, the drilling and grouting integrated device comprises a drilling machine 4, a drill rod 5, a connecting pipe 6, a drill bit 7, a slurry inlet pipe 8, a water inlet pipe 9, an air inlet pipe 10 and a pressure relief channel.
Referring to fig. 3, the drill rod 5 includes an inner tube 51 and an outer tube 52 sleeved outside the inner tube 51, a tube passage of the inner tube 51 is a hollow through groove 54 for slurry or water to flow through, a circumferential wall of the inner tube 51 is provided with a vent hole 53, an aperture diameter of the vent hole 53 on an inner circumferential side surface of the inner tube 51 is smaller than an aperture diameter of the vent hole 53 on an outer circumferential side surface of the inner tube 51, an aperture of the vent hole 53 on the inner circumferential side surface of the inner tube 51 deflects toward the drill bit 7, a vent groove 55 is formed between the inner tube 51 and the outer tube 52, and the outer tube 52 is provided with an air inlet pipe 10 in a communication manner.
Referring to fig. 3, according to the depth of the required drilling hole, the drill rod 5 is formed by splicing a plurality of drill rod supporting rods, the drill rod supporting rods can be connected through sealing threads for splicing, the existing connecting piece connection mode can also be used, and the connection mode can be selected according to specific requirements. During splicing, after the inner pipe 51 and the outer pipe 52 of the drill rod 5 are spliced to required lengths respectively, the outer pipe 52 is sleeved on the outer side of the inner pipe 51 to complete the composition of the drill rod 5, and then the drill rod 5 is connected with other parts. The drill rod 5 is threaded onto the drilling machine 4, and the drilling machine 4 drives the drill rod 5 to rotate and advance to apply the drill. One end of the drill rod 5 is connected with an end cover for sealing the end port of the drill rod, the end cover is provided with a connecting through pipe communicated with the hollow through groove 54 and an air inlet through pipe communicated with the air through groove 55, the connecting through pipe on the end cover is respectively communicated with the pulp inlet pipe 8 and the water inlet pipe 9 through a three-way joint, and the pulp inlet pipe 8 and the water inlet pipe 9 are respectively provided with a valve piece for controlling the on-off of the pipeline. The air inlet pipe on the end cover is communicated with an air inlet pipe 10, and a valve piece is arranged on the air inlet pipe 10 to control the on-off of the pipeline. The connecting through pipe is also communicated with a pressure relief channel, and the pressure relief channel is provided with a pressure relief valve 11.
Referring to fig. 4 and 5, the end of the drill rod 5 remote from the end cap is connected to a drill bit 7 by a connecting tube 6. A plurality of diamond tool bits 65 are arranged on one end opening of the connecting pipe 6 far away from the drill rod 5, one end of each diamond tool bit 65 is integrally connected, the other end of each diamond tool bit 65 is respectively connected to the pipe opening of the connecting pipe 6, the diamond tool bits 65 are distributed along the circumferential direction of the connecting pipe 6, and a cutting surface formed by the diamond tool bits 65 protrudes out of the pipe opening of the connecting pipe 6; a plurality of diamond blades 66 are arranged between the adjacent diamond cutter heads 65, one end of each diamond blade 66 is connected with the common connecting end of the diamond cutter head 65, the other end of each diamond blade 66 is connected with the pipe orifice of the connecting pipe 6, a slurry outlet gap is formed between the adjacent diamond blades 66, the cutting surface formed by each diamond blade 66 is lower than the cutting surface of the diamond cutter head 65, when the connecting pipe 6 is connected with the drill bit 7, each diamond cutter head 65 is arranged in the slurry outlet of the drill bit 7, and the cutting surface formed by each diamond cutter head 65 is lower than the cutting surface of the drill bit 7.
Referring to fig. 4 and 6, a closure cover plate 61 is further arranged in the connecting pipe 6, a through hole 62 penetrating through the plate surface is formed in the closure cover plate 61, a rubber sheet 63 is arranged on one surface, away from the drill rod 5, of the closure cover plate 61, the rubber sheet 63 covers the plate surface of the closure cover plate 61, the circle center of the rubber sheet 63 is fixed on the closure cover plate 61 through screws, the rubber sheet 63 is located below the diamond tool bit 65 and the diamond blade 66, and intervals for deformation of the rubber sheet 63 are formed between the rubber sheet 63 and the diamond tool bit 65 and between the diamond blade 66. The one side epirelief that dams apron 61 is close to drilling rod 5 is equipped with a plurality of guide plates 64, and guide plate 64 is arc form guide plate 64, and on guide plate 64 located the position between the adjacent perforation 62, the one end of guide plate 64 towards the centre of a circle department of the apron 61 that dams, the other end of guide plate 64 towards the circumference department of the apron 61 that dams, each guide plate 64 constitutes the water conservancy diversion structure of the radial outward diffusion of the department of the centre of a circle of the apron 61 that dams.
Referring to fig. 4 and 6, an inner wall of the pipe of the connection pipe 6 is provided with an internal thread, and an external thread is provided on a circumference periphery of the closure cover plate 61, so that the rubber sheet 63 and the closure cover plate 61 are assembled at first during installation, and then the closure cover plate 61 is rotated inward (rotated using the deflector 64 as a rotation pivot) by a port at one end of the connection pipe 6, which is far away from the diamond segments 65, so that the closure cover plate 61 is fastened in the connection pipe 6 by a matching thread of the internal thread and the external thread.
Referring to fig. 4 and 6, after the cutoff plate is assembled, the drill bit 7 and the drill rod 5 are assembled, the outer wall of the connecting pipe 6 is provided with external threads, when the drill bit 7 and the connecting pipe 6 are installed, one end of the connecting pipe 6, which is provided with the diamond tool bit 65, is sleeved into the grout outlet of the drill bit 7, and the drill bit 7 is fastened on the connecting pipe 6 through the external threads of the connecting pipe 6, so that the installation of the drill bit 7 is completed; when the drill rod 5 and the connecting pipe 6 are installed, the outer circumferential wall of the inner pipe 51 is provided with external threads, the inner circumferential wall of the outer pipe 52 is provided with internal threads, the inner pipe 51 and the inner wall of the connecting pipe 6 are matched through the internal threads and the external threads to be installed in a threaded fastening mode, the outer pipe 52 and the outer wall of the connecting pipe 6 are matched through the internal threads and the external threads to be installed in a threaded fastening mode, and therefore the installation of the drill rod 5 and the connecting pipe 6 is completed.
Referring to fig. 3, after the drilling and grouting integrated device is completed, the drill rod 5 is stretched into the orifice pipe 3 for drilling, in the drilling process, the pipeline of the slurry inlet pipe 8 is closed, the pressure release valve 11 is closed, the pipeline of the water inlet pipe 9 and the pipeline of the air inlet pipe 10 are opened, the water flow output by the water inlet pipe 9 sequentially passes through the connecting pipe, the hollow through groove 54 of the inner pipe 51, the pipeline of the connecting pipe 6, the perforation 62 of the closure cover plate 61, the slurry outlet gap of the diamond blade 66, the slurry outlet of the drill bit 7, the gap of the cutter head of the drill bit 7 on the drill bit 7 flows out, the drilling after drilling is performed, finally, the drilling is performed through the orifice pipe 3, and the water flow circulation process drives the discharge of impurities such as crushed rocks generated by drilling. Meanwhile, the air pressure of the air flow output by the air inlet pipe 10 is greater than the water pressure of the water flow, the air flow output by the air inlet pipe 10 is injected into the flowing water flow through the vent groove 55 of the outer pipe 52 and the vent hole 53 of the inner pipe 51 in sequence, the water pressure of the water flow is increased, and the impurity removing effect of the water flow is improved.
And S4, grouting operation, wherein the grouting operation is performed through a drilling and grouting integrated device.
Grouting equipment is arranged on site, and a grout outlet of the grouting equipment is connected with a grout inlet pipe 8 of the drilling and grouting integrated device.
Referring to fig. 7, during grouting operation, the drill rod 5 is stopped by using the stop-grouting plug 12 and the stop-grouting connecting disc 13; stopping drilling after the drilling reaches the required depth, and closing the pipeline of the water inlet pipe 9 and the pipeline of the air inlet pipe 10; a section of drill rod supporting rod of the drill rod 5 positioned outside the orifice pipe 3 is disassembled, the grout stop plug 12 and the grout stop connecting disc 13 are sequentially sleeved on the drill rod 5, the disassembled drill rod supporting rod is spliced and connected, the grout stop connecting disc 13 is fixedly connected with the orifice pipe 3 through a connecting flange, and the grout stop connecting disc 13 pushes the grout stop plug 12 into a gap between the drill rod 5 and the orifice pipe 3 and fixes the grout stop plug; after the grout stop plug 12 and the grout stop connecting disc 13 are installed, the drilling machine 4 drives the drill rod 5 to keep rotating, and meanwhile, the pipeline of the grout inlet pipe 8 and the pipeline of the air inlet pipe 10 are opened for grouting. In the grouting process, the grout output by the grout inlet pipe 8 flows out through the connecting through pipe, the hollow through groove 54 of the inner pipe 51, the pipeline of the connecting pipe 6, the perforation 62 of the intercepting cover plate 61, the grout outlet gap of the diamond blade 66, the grout outlet of the drill bit 7 and the gap of the bit head of the drill bit 7 on the drill bit 7 in sequence, then flows through the drilled borehole, the grout stop plug 12 prevents the grout from overflowing from the orifice pipe 3, the grouting pressure promotes the grout to realize the permeation and reinforcement of the coating along with the grouting, meanwhile, the air pressure of the air flow output by the air inlet pipe 10 is larger than the grouting pressure of the grout, the air flow output by the air inlet pipe 10 is sequentially injected into the grout in the flow through the vent groove 55 of the outer pipe 52 and the vent hole 53 of the inner pipe 51, the grouting pressure can be assisted to be increased, the grout permeation strengthening effect can be improved, the grouting speed can be accelerated, the air pressure of the air flow can be controlled to be kept the same as the grouting pressure, and the grout cannot be subjected to reverse osmosis from the air vent 53; after grouting meets the grouting requirement, closing the pipeline of the grout inlet pipe 8 and the pipeline of the air inlet pipe 10, opening the pressure release valve 11, disassembling the grout stop connecting disc 13, withdrawing the grout stop plug 12, withdrawing the drill rod 5 from the orifice pipe 3 by the distance of one drill rod supporting rod, disassembling the withdrawn drill rod supporting rod, connecting the rest drill rods 5, fixedly mounting the grout stop connecting disc 13 and the grout stop plug 12 again, driving the drill rod 5 by the drilling machine 4 to rotate, simultaneously opening the pipeline of the grout inlet pipe 8 and the pipeline of the air inlet pipe 10, performing secondary grouting, and performing circulation operation until the drill rod 5 is completely withdrawn from the orifice pipe 3, so that the grouting operation is completed;
s5, checking grouting effect, drawing a grouting amount and grouting pressure distribution diagram according to drilling and grouting records, analyzing whether a grouting weak area exists, and performing supplementary grouting on the grouting weak area; drilling a grouting inspection hole in a grouting weak area, coring the whole grouting inspection hole, observing the core sample integrity rate and the slurry wrapping effect, and measuring the water seepage amount of the grouting inspection hole; and the full-face excavation construction can be carried out when the grouting effect meets the requirement.
The implementation principle of the embodiment 1 is as follows: the structure of a multi-layer cutting surface is designed, so that impurities generated by drilling are fully crushed, the possibility of impurity accumulation is reduced, the problem of blockage of a slurry outlet is solved, and meanwhile, the slurry is endowed with a shearing effect, the granularity of the slurry is reduced, and the permeability of the slurry is improved; combine the supplementary pressure boost effect of air current, promote edulcoration effect and slip casting efficiency.
Example 2
Referring to fig. 8, this embodiment is different from embodiment 1 in that the cutting face of each diamond blade 66 located between the diamond tips 65 is gradually changed from high to low to high in the circumferential direction of the joint pipe 6.
The implementation principle of the embodiment 2 is as follows: through the design of the gradual change type cutting face, the multi-gradation and multi-directionality of the cutting face are improved, the crushing effect is improved, the possibility of blockage is reduced, and the slurry shearing property is improved.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. A tunnel drilling and grouting integrated grouting reinforcement construction method is characterized in that: the method comprises the steps of measuring hole distribution, constructing a grout stopping wall, drilling operation, grouting operation and grouting effect inspection, wherein the drilling operation and the grouting operation are carried out through a drilling and grouting integrated device, the drilling and grouting integrated device comprises a drill rod (5), a connecting pipe (6) and a drill bit (7), the drill rod (5) is connected with the drill bit (7) through the connecting pipe (6), the drill rod (5) is provided with a hollow through groove (54), and a grout outlet is formed in the drill bit (7); a plurality of diamond tool bits (65) are arranged on one port of the connecting pipe (6) far away from the drill rod (5), the diamond tool bits (65) are arranged along the circumferential direction of the connecting pipe (6), a cutting surface formed by the diamond tool bits (65) protrudes out of the pipe orifice of the connecting pipe (6), a communication gap is formed between every two adjacent diamond tool bits (65), when the connecting pipe (6) is connected with the drill bit (7), the diamond tool bits (65) are arranged in the slurry outlet of the drill bit (7), and the cutting surface formed by the diamond tool bits (65) is lower than the cutting surface of the drill bit (7); a check valve is arranged in the connecting pipe (6).
2. The tunnel drilling and grouting integrated grouting reinforcement construction method according to claim 1, characterized in that: a plurality of diamond blades (66) are arranged between the adjacent diamond tool heads (65), slurry outlet gaps are formed between the adjacent diamond blades (66), and the cutting surface formed by each diamond blade (66) is lower than the cutting surface of the diamond tool head (65).
3. The tunnel drilling and grouting integrated grouting reinforcement construction method according to claim 2, characterized in that: the cutting surface of each diamond blade (66) is gradually changed from high to low to high along the circumferential direction of the connecting pipe (6).
4. The tunnel drilling and grouting integrated grouting reinforcement construction method according to claim 2, characterized in that: the blade surface of the diamond blade (66) is twisted into a spiral shape.
5. The tunnel drilling and grouting integrated grouting reinforcement construction method according to claim 1, characterized in that: check valve is including locating the apron (61) that dams in connecting pipe (6), set up perforation (62) that run through the face on the apron (61) that dams, it is equipped with rubber piece (63) to dam in the one side of apron (61) keeping away from drilling rod (5), rubber piece (63) cover the face of apron (61) dams, the centre of a circle department of rubber piece (63) is fixed in through the screw on the apron (61) dams, and rubber piece (63) are located the below of diamond segments (65), has the interval that supplies rubber piece (63) deformation between rubber piece (63) and diamond segments (65).
6. The tunnel drilling and grouting integrated grouting reinforcement construction method according to claim 5, characterized in that: the one side epirelief that dams apron (61) are close to drilling rod (5) is equipped with a plurality of guide plates (64), guide plate (64) are arc form guide plate (64), on guide plate (64) were located the position between adjacent perforation (62), the one end of guide plate (64) was located towards the centre of a circle of damming apron (61), the other end of guide plate (64) was located towards the circumference of the apron (61) that dams, and each guide plate (64) constitute by the radial outside water conservancy diversion structure of the radial outside diffusion of apron (61) centre of a circle department of dams.
7. The tunnel drilling and grouting integrated grouting reinforcement construction method according to claim 1, characterized in that: the drill rod (5) comprises an inner pipe (51) and an outer pipe (52) sleeved outside the inner pipe (51); a vent groove is formed between the inner pipe (51) and the outer pipe (52), vent holes (53) are formed in the circumferential wall of the inner pipe (51), and the outer pipe (52) is communicated with an air inlet pipe (10).
8. The tunnel drilling and grouting integrated grouting reinforcement construction method according to claim 7, characterized in that: the aperture of the vent hole (53) on the inner circumferential side of the inner tube (51) is smaller than the aperture of the vent hole (53) on the outer circumferential side of the inner tube (51).
9. The tunnel drilling and grouting integrated grouting reinforcement construction method according to claim 8, characterized in that: the vent hole (53) is a conical air hole, and threads are arranged on the circumferential inner wall of the vent hole (53).
10. The tunnel drilling and grouting integrated grouting reinforcement construction method according to claim 8, characterized in that: the vent hole is formed in the inner circumferential side of the inner tube (51) and has an opening that is deflected in the direction of the drill bit (7).
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| CN202110470802.9A CN113175334A (en) | 2021-04-29 | 2021-04-29 | Drilling and grouting integrated grouting reinforcement construction method for tunnel |
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| CN116044455A (en) * | 2023-04-03 | 2023-05-02 | 湖南大学 | Grouting system for directional reinforcement of tunnel |
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