CN110529155B - Drill bit grout stopping drill rod sectional retreating type grouting method - Google Patents
Drill bit grout stopping drill rod sectional retreating type grouting method Download PDFInfo
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- CN110529155B CN110529155B CN201910916809.1A CN201910916809A CN110529155B CN 110529155 B CN110529155 B CN 110529155B CN 201910916809 A CN201910916809 A CN 201910916809A CN 110529155 B CN110529155 B CN 110529155B
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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
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
Abstract
The invention discloses a drill bit stop-grouting drill rod sectional retreating type grouting method, which comprises the following steps: starting a drilling machine and drilling at a designed position; after drilling to the depth of the double-pipe drill rod, removing the high-pressure water and air supply system, connecting another double-pipe drill rod and the hydraulic bag infusion tube with the double-pipe drill rod and the hydraulic bag infusion tube in the hole, and continuously drilling to the depth of the double-pipe drill rod; continuously extending the double-pipe drill rod and the hydraulic bag infusion pipe until the drilling hole reaches the designed depth; and injecting liquid into the grout stopping hydraulic bags through the hydraulic bag liquid conveying pipes in sequence to enable the grout stopping hydraulic bags to expand along the radial direction of the drill hole, enabling the grout stopping hydraulic bags to be tightly attached to the side wall of the drill hole, and forming a sealing area in the drill hole in front of the grout stopping hydraulic bags. And grouting towards a sealing area through each double-pipe drill rod and the drill bit in sequence. By adopting the grouting method, the drill rod and the drill bit can be prevented from being locked by the solidification of slurry, the drill rod retreating type grouting process is convenient and quick, the requirement on drilling machine equipment is low, and the loss is small.
Description
[ technical field ] A method for producing a semiconductor device
The invention belongs to the technical field of civil engineering tunnel construction, and particularly relates to a segmented retreating type grouting method for a drill bit grout stopping drill rod.
[ background of the invention ]
In the construction of tunnels and underground engineering, the construction safety of the tunnels is endangered due to the fact that water burst and mud gushing and large deformation of excavation faces are easy to occur when the tunnel and the underground engineering are frequently subjected to soft water-rich strata. At present, the improvement of the properties of the surrounding rock is usually carried out by adopting a grouting method, namely, a cementitious material is injected into the surrounding rock through certain pressure and is solidified, and a pore is filled to compact a soil body, so that good reinforcing and water plugging effects are achieved.
Currently, the main horizontal grouting methods are divided into two types: namely sectional advancing grouting and sectional retreating grouting of a drill rod. The drill rod retreating type grouting is relatively good in applicable stratum conditions, the drilling can be basically carried out once, namely, the drilling depth can reach the designed drilling depth, then the hole opening is sealed or self-sealing is carried out by utilizing quick setting grout, the sealing device is removed after grouting, the drill rod retreats and the redundant drill rod is removed, grouting is sealed again until the drill rod is completely withdrawn, and multiple times of sectional grouting in the whole hole are completed. The method has high grouting efficiency and short grouting construction period, but because the grout fills the pores between the drill rod and the drill hole and tightly holds the drill rod and clamps the drill bit after consolidation (the diameter of the drill bit is larger than that of the drill rod), a drilling machine power head with high power and large torque is required for realizing the retreating of the drill rod, the drilling machine power head needs to be repeatedly rotated and beaten, the grout is broken by shaking and solidified bodies and then pulled out, the requirements on equipment are high, the abrasion is large, the maintenance and replacement cost of key parts such as spline shafts in the power head is expensive, and the risk of retreating and escaping failure exists in the process of grouting deep holes which are.
[ summary of the invention ]
The invention aims to provide a sectional retreating type grouting method for a drill bit stop-grouting drill rod, which can avoid the drill rod and the drill bit from being locked by slurry solidification, realize a convenient and quick drill rod retreating type grouting process and has low requirement on drilling machine equipment and low loss.
The invention adopts the following technical scheme: a sectional retreating type grouting method of a drill bit grout stopping drill rod uses a sectional retreating type grouting device of the drill bit grout stopping drill rod, and the grouting device comprises:
the double-pipe drill rods sequentially and axially drill into the grouting holes and are detachably connected; defining the inside of the drill hole as the front and the outside as the back; the front end of the double-pipe drill rod at the most front end is connected with a single-channel drill bit;
the hydraulic bag infusion tubes are consistent with the double-tube drill rods in number and length and are parallel, the hydraulic bag infusion tube at the forefront end is communicated with a grout stopping pressure bag which is a hollow elastic bag-shaped body and covers the outer wall of the front section of the double-tube drill rod at the forefront end;
the grouting method comprises the following steps:
connecting a high-pressure water and air supply system with a first double-pipe drill pipe, starting a drilling machine, and drilling at a designed position;
step two, after drilling to the depth of the double-pipe drill rod, removing the high-pressure water and air supply system, connecting another double-pipe drill rod and a hydraulic bag infusion tube with the double-pipe drill rod and the hydraulic bag infusion tube in the hole, and continuously drilling to the depth of the double-pipe drill rod; continuously connecting another double-pipe drill rod and the hydraulic bag infusion tube, repeating the operations in sequence, and continuously extending the double-pipe drill rod and the hydraulic bag infusion tube until the drilling hole reaches the designed depth;
connecting the hydraulic bag liquid conveying pipes with an electric hydraulic pump, sequentially injecting liquid into the grout stopping hydraulic bag through each hydraulic bag liquid conveying pipe to enable the grout stopping hydraulic bag to expand along the radial direction of the drill hole, enabling the grout stopping hydraulic bag to be tightly attached to the side wall of the drill hole, and forming a sealing area in the drill hole in front of the grout stopping hydraulic bag;
fourthly, removing the high-pressure water and air supply system, connecting the grouting system with the double-pipe drill rod at the rearmost end, and grouting towards the sealing area through the double-pipe drill rods and the drill bits in sequence to finish grouting of the section; after the slurry is solidified, discharging the liquid in the slurry stopping pressing bag 1 to recover the shrinkage state;
step five, the length of a double-pipe drill rod is retreated, and the rearmost double-pipe drill rod and the hydraulic bag infusion tube are disassembled;
and step six, repeating the step four to the step five, and grouting in sections until the design grouting requirement in the drill hole is met.
Furthermore, each double-pipe drill rod is of a concentric double-layer pipe structure, the inner-layer pipe is of a hollow structure, and an annular channel is formed between the outer-layer pipe and the inner-layer pipe.
Furthermore, the front and the back of each hydraulic bag infusion tube are sequentially detachably connected and communicated; tightly attaching to the corresponding double-pipe drill rod; the rearmost hydraulic bag infusion tube is used for being connected with an electric hydraulic pump pipeline.
Further, when the grout stopping hydraulic bag is filled with liquid, the grout stopping hydraulic bag expands along the radial direction of the drill hole and is tightly attached to the side wall of the drill hole, and a sealing area is formed in the front of the drill hole; when the liquid is discharged, it contracts to the original state.
Further, in the third step, the pressure in the grout stopping pressure bag after expansion is not less than 1.5 times of the designed grouting pressure.
Further, when the grout stopping hydraulic bag is in a contracted state, the length of the grout stopping hydraulic bag is not less than 2m, and the width of the grout stopping hydraulic bag is at least 2cm smaller than the widest part of the drill bit.
Furthermore, a semicircular groove is axially formed in the outer wall of each double-pipe drill rod and used for clamping the hydraulic bag infusion tube; the inner diameter of each groove is consistent with the diameter of the hydraulic capsule infusion tube.
Furthermore, all adjacent double-pipe drill rods and adjacent hydraulic bag infusion pipes are connected through quick connectors.
Furthermore, a rubber sleeve is sleeved at the quick joint between each two adjacent double-pipe drill rods and each two adjacent hydraulic bag infusion pipes.
Furthermore, a single pipe is integrally communicated between the double-pipe drill rod and the drill bit at the bottom of the hole.
The invention has the beneficial effects that:
1. the locking of the drill rod and the drill bit after the slurry is solidified is avoided, the grouting device is more suitable for deep hole grouting larger than 20m, the process of drill rod escaping and retreating is omitted, and the grouting construction efficiency is improved.
2. The performance requirements on drilling machine equipment, such as torque, hydraulic hammer and drawing force, are reduced, and equipment abrasion and operation and maintenance cost are reduced.
[ description of the drawings ]
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
FIG. 2 is a schematic structural diagram of the construction process according to the embodiment of the present invention.
Fig. 3 is an enlarged sectional view of the double pipe drill.
Wherein: 1. the device comprises a slurry stopping pressure bag, 2 a hydraulic bag infusion tube, 3 a rubber sleeve, 4 a quick connector, 5 an electric hydraulic pump, 6 a pressure gauge, 10 a drill bit, 11 and a double-tube drill rod.
[ detailed description ] embodiments
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The embodiment of the invention discloses a sectional retreating type grouting method for a drill bit grout stopping drill rod, which uses a sectional retreating type grouting device for the drill bit grout stopping drill rod, and as shown in figures 1, 2 or 3, the grouting device comprises:
the double-pipe drill rods 11 are all concentric double-layer pipe structures, the inner-layer pipe is of a hollow structure, and an annular channel is formed between the outer-layer pipe and the inner-layer pipe; each double-pipe drill rod 11 sequentially and axially drills into a grouting hole, and all the double-pipe drill rods are detachably connected; defining the inside of the drill hole as the front and the outside as the back;
the drill bit 10 is axially provided with a single through hole, is connected with the end part of the double-pipe drill rod 11 at the foremost end and is communicated with the end part;
the lengths of the hydraulic bag infusion tubes 2 are consistent with that of a double-tube drill rod 11; the front and the back of each hydraulic bag transfusion tube 2 are sequentially detachably connected and communicated; tightly attached to the corresponding double-pipe drill rod 11; the hydraulic bag infusion tube 2 at the rearmost end is used for being connected with a pipeline of an electric hydraulic pump 5;
the grout stopping pressure bag 1 is a hollow elastic bag-shaped body, covers the outer wall of the front section of the double-pipe drill rod 11 at the foremost end, and is connected and communicated with the hydraulic bag infusion pipe 2 at the foremost end; when the capsule body is filled with liquid, the grout stopping pressure capsule 1 expands along the radial direction of the drill hole and is tightly attached to the side wall of the drill hole, and a sealing area is formed at the front part of the drill hole;
the grouting method comprises the following steps:
step one, connecting a high-pressure water and air supply system with a first double-pipe drill rod 11 through a pipeline, starting a drilling machine, and drilling holes at a designed position;
step two, after drilling to the depth of the double-pipe drill rod 11, removing the high-pressure water and air supply system, connecting another double-pipe drill rod 11 and the hydraulic bag infusion tube 2 with the double-pipe drill rod 11 and the hydraulic bag infusion tube 2 in the hole, and continuously drilling to the depth of the double-pipe drill rod 11; continuously connecting another double-pipe drill rod 11 and the hydraulic capsule infusion tube 2, repeating the operations in sequence, and continuously extending the double-pipe drill rod 11 and the hydraulic capsule infusion tube 2 until the drilling hole reaches the designed depth; the pressure in the expanded grout stopping hydraulic bag 1 is not less than 1.5 times of the designed grouting pressure.
Connecting the hydraulic bag infusion tube 2 with an electric hydraulic pump 5, injecting liquid into the grout stopping hydraulic bag 1 through each hydraulic bag infusion tube 2 in sequence, enabling the grout stopping hydraulic bag to expand along the radial direction of the drilled hole, enabling the grout stopping hydraulic bag 1 to be tightly attached to the side wall of the drilled hole, and forming a sealing area in the drilled hole in front of the grout stopping hydraulic bag;
step four, removing the high-pressure water and air supply system, connecting the grouting system with the double-pipe drill rod 11 at the rearmost end, and grouting towards the sealing area through the double-pipe drill rods 11 and the drill 10 in sequence to complete grouting of the section; the slurry is prevented from forming a consolidation body in the hole wall gap, and the drill rod is difficult to release when being held. After the slurry is solidified, discharging the liquid in the slurry stopping pressing bag 1 to recover the shrinkage state;
step five, retreating the length of a double-pipe drill rod 11, and disassembling the double-pipe drill rod 11 and the hydraulic bag infusion tube 2 at the rearmost end;
and step six, repeating the step four to the step five, and grouting in sections until the design grouting requirement in the drill hole is met.
When the grout pressing bag 1 is in a contracted state, the length of the grout pressing bag is not less than 2m, and the width of the grout pressing bag is at least 2cm smaller than the widest part of the drill 10. When the grout pressing bag 1 is in a contraction state, the length of the grout pressing bag 1 is not less than 2m, and the width of the grout pressing bag 1 is at least 2cm smaller than the widest part of the drill 10. So that the hole slag can be smoothly discharged from the hole wall gap in the hole sweeping process; after the volume of the grout stopping pressing bag 1 is expanded, the grout stopping pressing bag is close to the drill 10 and forms a grout stopping area with the front end of a drill hole, so that grout is prevented from forming a consolidation body in a hole wall gap to influence continuous drilling and deslagging; the length of the grout pressing bag 1 is more than 2m so as to have enough grout sealing capability after expansion.
A semicircular groove is axially formed in the outer wall of each double-pipe drill rod 11 and used for clamping the hydraulic bag infusion tube 2; the inner diameter of each groove is consistent with the diameter of the hydraulic capsule infusion tube 2. The adjacent double-pipe drill rods 11 and the adjacent hydraulic bag infusion tubes 2 are connected through quick connectors. The quick coupling 4 is selected to be suitable for pipe connections, all of which are formed products in the prior art.
The rubber sleeve 3 is sleeved at the quick joint between each two adjacent double-pipe drill rods 11 and the adjacent hydraulic bag infusion tube 2. A single pipe is integrally communicated between a double-pipe drill rod 11 at the bottom of the hole and the drill bit 10. Where the two slurries are buffer premixed.
Peripheral high pressure water, wind feed system and slip casting machine and drill bit stop the section of thick liquid drilling rod and retreat the formula slip casting device, have constituteed a section advancing type drilling rod quick slip casting system, stop the section of thick liquid drilling rod and retreat the formula slip casting device including foretell drill bit, still include: the high-pressure water and air supply system is connected with an outer pipe pipeline of a double-pipe drill rod 11 close to the orifice when drilling; the high-pressure air supply system is connected with the inner pipe pipeline; the slurry machine is connected with an inner pipe and an outer pipe of a double-pipe drill rod 11 close to the outermost end of the orifice when double slurry is injected; and the electric hydraulic pump 5 is detachably connected with a pipeline of the hydraulic bag infusion tube 2 close to the orifice and is used for filling liquid into the pulp stopping hydraulic bag 1. The high-pressure water, air supply system and the slurry machine are all the existing devices and are selected according to different construction working conditions such as required pressure, required speed and the like. In the drilling operation process, the hydraulic bag infusion tube 2 and the electric hydraulic pump 5 are in a disconnected state, so that the hydraulic bag infusion tube is prevented from being wound due to the rotation of the drill rod.
When actually drilling, the operation is as follows:
drilling preparation:
the hydraulic bag infusion tube 2 is embedded into a semicircular groove in the outer wall of the dual-tube drill rod 11 and tightened by the rubber sleeve 3, at the moment, the hydraulic bag infusion tube 2 and the electric hydraulic pump 5 are in a disconnected state, and the hydraulic bag infusion tube 2 and the dual-tube drill rod 11 can synchronously rotate; the inner and outer double pipelines of the double-pipe drill rod 11 are respectively connected with high-pressure air and water.
Drilling operation:
opening high-pressure air and water, starting a drilling machine to drill a hole, extending a new double-pipe drill rod 11 after drilling a double-pipe drill rod 11, simultaneously connecting a new hydraulic bag infusion tube 2 by using a quick connector 4, embedding the new hydraulic bag infusion tube 2 into a semicircular groove in the outer wall of the new double-pipe drill rod 11, and adding a rubber sleeve 3 for tightening; and in the same way, the double-pipe drill rod 11 and the hydraulic capsule infusion tube 2 are continuously prolonged, and the drilling depth is increased until the design depth is reached.
Grouting preparation:
the hydraulic bag infusion tube 2 is connected with the electric hydraulic pump 5 through the quick connector 4, the electric hydraulic pump 5 is started, liquid is injected into the grout stopping hydraulic bag 1 through the hydraulic bag infusion tube 2 to enable the volume of the grout stopping hydraulic bag to expand until the reading of the pressure gauge 6 reaches 1.5 times of the designed grouting pressure, and good sealing grout stopping body is formed; high-pressure air and water connected with the double-pipe drill rod 11 are removed and connected with a grouting machine;
grouting operation:
injecting quick-setting grout, such as polyurethane or cement-water glass double-liquid grout, into the sealed area through a grouting machine, and discharging the liquid in the grout stopping pressing bag 1 after the grout is solidified after the grouting operation of the section is finished so as to recover the shrinkage state;
the backward hydraulic capsule transfusion tube 2:
and (3) disconnecting the hydraulic capsule infusion tube 2 at the rear end tail section hydraulic capsule infusion tube 2, rotationally withdrawing one hydraulic capsule infusion tube 2, and dismantling the rear end dual-tube drill rod 11 and the hydraulic capsule infusion tube 2.
And repeating the operation, and retreating in sections to perform grouting operation until the design grouting requirement of the hole is met.
Claims (9)
1. A segmented retreating type grouting method of a drill bit grout stopping drill rod is characterized in that a segmented retreating type grouting device of the drill bit grout stopping drill rod is used, and the grouting device comprises:
the double-pipe drill rods (11) sequentially and axially drill into the grouting holes, and the double-pipe drill rods (11) are detachably connected; defining the inside of the drill hole as the front and the outside as the back; the front end of the double-pipe drill rod (11) at the most front end is connected with a single-channel drill bit (10);
the hydraulic bag infusion tubes (2) are consistent with the double-tube drill rod (11) in number and length and are arranged in parallel, the hydraulic bag infusion tube (2) at the forefront end is communicated with a grout stopping pressure bag (1), and the grout stopping pressure bag (1) is a hollow elastic bag-shaped body and covers the outer wall of the front section of the double-tube drill rod (11) at the forefront end; when the grout stopping pressure bag (1) is in a contracted state, the length of the grout stopping pressure bag is not less than 2m, and the width of the grout stopping pressure bag is at least 2cm smaller than the widest part of the drill bit (10);
the grouting method comprises the following steps:
step one, connecting a high-pressure water and air supply system with a first double-pipe drill rod (11) through a pipeline, starting a drilling machine, and drilling at a designed position;
step two, after drilling to the depth of the first double-pipe drill rod (11), removing the high-pressure water and air supply system, connecting another double-pipe drill rod (11) and the hydraulic bag infusion tube (2) with the double-pipe drill rod (11) and the hydraulic bag infusion tube (2) in the hole, and continuously drilling to the depth of the double-pipe drill rod (11); continuously connecting another double-pipe drill rod (11) and the hydraulic bag infusion tube (2), repeating the operations in sequence, and continuously prolonging the double-pipe drill rod (11) and the hydraulic bag infusion tube (2) until the drilling hole reaches the designed depth;
connecting the hydraulic bag infusion tube (2) with an electric hydraulic pump (5), injecting liquid into the grout stopping hydraulic bag (1) through each hydraulic bag infusion tube (2) in sequence to enable the grout stopping hydraulic bag to expand along the radial direction of a drilled hole, enabling the grout stopping hydraulic bag (1) to be tightly attached to the side wall of the drilled hole, and forming a sealing area in the drilled hole in front of the grout stopping hydraulic bag;
fourthly, removing the high-pressure water and air supply system, connecting the grouting system with the double-pipe drill rod (11) at the rearmost end, and grouting towards the sealing area through the double-pipe drill rods (11) and the drill bit (10) in sequence to complete grouting of the section; after the slurry is solidified, discharging the liquid in the slurry stopping pressing bag 1 to recover the shrinkage state;
step five, retreating the length of one double-pipe drill rod (11), and disassembling the rearmost double-pipe drill rod (11) and the hydraulic bag infusion tube (2);
and step six, repeating the step four to the step five, and grouting in sections until the design grouting requirement in the drill hole is met.
2. The sectional retreating type grouting method for the drill bit stop-grouting drill rod according to claim 1, characterized in that each double-pipe drill rod (11) is of a concentric double-pipe structure, the inner pipe is of a hollow structure, and an annular channel is formed between the outer pipe and the inner pipe.
3. The segmented retreating type grouting method for the drill bit grout stopping drill rod according to claim 2, wherein the hydraulic bag liquid conveying pipes (2) are sequentially detachably connected and communicated in the front and the back; tightly attached to the corresponding double-pipe drill rod (11); the hydraulic bag infusion tube (2) at the rearmost end is used for being connected with an electric hydraulic pump (5) through a pipeline.
4. The segmented retreating type grouting method of the drill bit grout stopping drill rod is characterized in that when liquid is filled into the grout stopping pressure bag (1), the grout stopping pressure bag expands along the radial direction of the drilled hole and is tightly attached to the side wall of the drilled hole, and a sealing area is formed in the front of the drilled hole; when the liquid is discharged, it contracts to the original state.
5. The segmented retreating grouting method of the drill bit grout stopping drill rod according to claim 1, characterized in that in the third step, the pressure in the expanded grout stopping pressure bag (1) is not less than 1.5 times of the designed grouting pressure.
6. The sectional retreating type grouting method for the drill bit grout stopping drill rod according to claim 5, wherein a semicircular groove is axially formed in the outer wall of each double-pipe drill rod (11) and used for clamping the hydraulic bag infusion tube (2); the inner diameter of each groove is consistent with the diameter of the hydraulic capsule infusion tube (2).
7. The segmented retreating type grouting method of the drill bit stop-grouting drill rod is characterized in that each adjacent double-pipe drill rod (11) and each adjacent hydraulic bag liquid conveying pipe (2) are connected through a quick joint.
8. The segmented retreating type grouting method of the drill bit grout stopping drill rod as claimed in claim 7, wherein a rubber sleeve (3) is sleeved at a quick joint between each adjacent double-pipe drill rod (11) and each adjacent hydraulic bag infusion pipe (2).
9. The sectional retreating grouting method for the drill bit stop-grouting drill rod according to claim 8, characterized in that a single pipe is integrally communicated between the double-pipe drill rod (11) and the drill bit (10) at the bottom of the hole.
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| CN112854194B (en) * | 2021-01-15 | 2022-03-15 | 山东科技大学 | Device for retreating type grouting and using method |
| CN112963618B (en) * | 2021-05-19 | 2021-08-06 | 中煤科工能源科技发展有限公司 | Method and device for long-distance laying and continuous filling of filling pipeline of side coal mining cave |
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