CN109025803B - Static pressure grouting construction method before pipe jacking construction - Google Patents
Static pressure grouting construction method before pipe jacking construction Download PDFInfo
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- CN109025803B CN109025803B CN201811161198.6A CN201811161198A CN109025803B CN 109025803 B CN109025803 B CN 109025803B CN 201811161198 A CN201811161198 A CN 201811161198A CN 109025803 B CN109025803 B CN 109025803B
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- 238000010276 construction Methods 0.000 title claims abstract description 38
- 230000003068 static effect Effects 0.000 title claims abstract description 20
- 239000000428 dust Substances 0.000 claims abstract description 178
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 238000005553 drilling Methods 0.000 claims abstract description 28
- 238000005507 spraying Methods 0.000 claims abstract description 21
- 239000003595 mist Substances 0.000 claims abstract description 6
- 238000000926 separation method Methods 0.000 claims description 32
- 230000000149 penetrating effect Effects 0.000 claims description 8
- 230000007246 mechanism Effects 0.000 claims description 7
- 239000007921 spray Substances 0.000 claims description 7
- 230000000712 assembly Effects 0.000 claims description 2
- 238000000429 assembly Methods 0.000 claims description 2
- 230000000903 blocking effect Effects 0.000 claims description 2
- 125000006850 spacer group Chemical group 0.000 claims 4
- 238000005192 partition Methods 0.000 claims 1
- 238000009792 diffusion process Methods 0.000 abstract description 5
- 230000005764 inhibitory process Effects 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 16
- 230000000694 effects Effects 0.000 description 7
- 230000002349 favourable effect Effects 0.000 description 7
- 241000883990 Flabellum Species 0.000 description 6
- 239000004576 sand Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000005267 amalgamation Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 239000004575 stone Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 230000036961 partial effect Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
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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
- E21B4/00—Drives for drilling, used in the borehole
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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
- 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
- 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
- E21B21/01—Arrangements for handling drilling fluids or cuttings outside the borehole, e.g. mud boxes
- E21B21/015—Means engaging the bore entrance, e.g. hoods for collecting dust
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- 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
- E21D9/001—Improving soil or rock, e.g. by freezing; Injections
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- Geochemistry & Mineralogy (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Soil Sciences (AREA)
- Earth Drilling (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention discloses a static pressure grouting construction method before pipe jacking construction, which comprises the steps of drilling and then performing static pressure grouting; before drilling, acquiring a down-the-hole drill with the following structure, wherein the down-the-hole drill comprises a sliding frame and a sliding plate, and a rotary assembly and a drill rod are arranged on the sliding plate; the lower end of the sliding frame is provided with a guide seat; a dust falling cover which is big at the top and big at the bottom is arranged on the guide seat, and the top of the dust falling cover is provided with a first through hole for a drill rod to pass through; the inner wall of the dust falling cover is provided with a spraying device, and the spraying device is positioned at the upper part of the dust falling cover and is arranged towards the middle part of the dust falling cover along the oblique lower part; the dust falling cover is also provided with a water inlet communicated with the spraying device, and the water inlet is connected with a water supply pump; during drilling, water is supplied to the spraying device through the water supply pump, and dust in the dust falling cover is in contact with water mist to settle. The invention has the advantages of simple and convenient drilling operation, effective inhibition of dust diffusion, small dust emission, contribution to improving the working environment and the like.
Description
Technical Field
The invention relates to the technical field of static pressure grouting construction, in particular to a static pressure grouting construction method before pipe jacking construction.
Background
The down-the-hole drill is an impact rotary drill, when drilling, the impacter is down-the-hole, the piston (hammer) in the impacter reciprocates to strike the drill bit tail through the air distributing device (valve), so that the drill bit impacts the hole bottom rock. The high-speed rotation of the impactor in the hole is realized by a single rotating mechanism, namely an electric motor or a pneumatic rotating device outside the hole through a drill rod connected to the rear end of the impactor. The rock powder produced during rock drilling is flushed out of the discharge hole by the mixed gas of air and water, and the mixed gas is injected into the impactor from the powder discharge mechanism through the center of the drill rod and then enters the bottom of the hole through the gas groove on the cylinder body of the impactor.
In the pipe jacking construction, when part of sandy soil which is very easy to collapse is encountered, in order to ensure the construction safety, the sandy soil must be solidified, and the adopted mode is static pressure grouting. A down-the-hole drill is used for guiding holes before static pressure grouting construction, and then grouting perforated pipes are placed. In the process of down-the-hole drill construction, the soil slag can be sprayed out along with the drill rod, which has great influence on the surrounding environment and is not beneficial to safe and civilized construction. In the traditional construction process, a fog gun machine is used for aiming at the position of a drill rod for dust fall, but the effect is not good in actual construction.
Disclosure of Invention
Aiming at the defects of the prior art, the technical problems to be solved by the invention are as follows: how to provide a static pressure grouting construction method before pipe jacking construction, which is simple and convenient in drilling operation, can effectively inhibit dust diffusion, has small dust emission and is beneficial to improving the working environment.
In order to solve the technical problems, the invention adopts the following technical scheme:
a static pressure grouting construction method before pipe jacking construction comprises the following steps: firstly, measuring and marking a position to be grouted, then drilling holes at the marked position by using a down-the-hole drill, and then performing static pressure grouting after drilling the holes; the down-the-hole drill is characterized in that before drilling, a down-the-hole drill with the following structure is obtained, wherein the down-the-hole drill comprises a sliding frame and a sliding plate which is slidably arranged on the sliding frame, a rotary assembly and a drill rod which is arranged at the output end of the rotary assembly are arranged on the sliding plate; a guide seat is vertically arranged at the lower end of the sliding frame, a guide hole which is coaxial with the rotary assembly is formed in the guide seat, and the drill rod penetrates through the guide hole; a dust falling cover which is big at the top and big at the bottom is arranged on the guide seat, and a first through hole for a drill rod to pass through is formed in the top of the dust falling cover; the inner wall of the dust falling cover is provided with a spraying device, and the spraying device is positioned on the upper part of the dust falling cover and is arranged towards the middle part of the dust falling cover along the oblique lower part; the dust falling cover is also provided with a water inlet communicated with the spraying device, and the water inlet is connected with a water supply pump; during drilling, water is supplied to the spraying device through the water supply pump, and dust in the dust falling cover is in contact with water mist to settle.
Through installing the dust fall cover on the guide holder at balladeur train lower extreme, can carry out preliminary shade to the dust that spills over during the construction, avoid dust loss, simultaneously, utilize the atomizer that dust fall cover inner wall set up to spray, just can make dust particle and vaporific water particle combine, promote dust and subside to effective dust fall. The dust collecting device is simple in structure, convenient to operate and use, capable of effectively reducing dust diffusion and raising dust, and beneficial to improvement of the operation environment.
Furthermore, a separation net which is perpendicular to the axis direction is arranged in the dust falling cover, and a second through hole for a drill rod to pass through is formed in the middle of the separation net; the separation net is positioned at the lower part of the dust falling cover.
Like this, can separate the great grit of partial particle diameter through separating the net, prevent that the grit from striking dust fall cover and atomizer, be favorable to improving dust fall cover and atomizer's life. In addition, the large-particle-size sand stone can settle, and after the sand stone is separated, the spraying device only sprays and dusts to the particle dust easy to escape, so that the dustfall effect can be improved, and the water for dustfall is saved.
Further, the separation net comprises a frame with the shape consistent with that of the inner hole of the dust falling cover and a net arranged on the frame; a plurality of buckles used for fixing the frame are arranged in the dust falling cover along the circumferential direction, and the cross section of the dust falling cover at the buckle position is consistent with the size of the frame; the frame is detachably clamped on the clamping buckle.
Because the strength of the separation net is relatively low and the separation net is impacted by the sand with large particle size for a long time, the damage rate of the separation net is relatively high and the separation net needs to be replaced regularly. In the structure, the separation net is detachably arranged in the dust falling cover through the buckle, so that the separation net can be quickly disassembled and assembled conveniently, and the maintenance and the replacement are convenient.
Further, the upper end of buckle is connected fall on the inner wall of dirt cover, the lower extreme with fall and form the bayonet socket between the inner wall of dirt cover, the middle part orientation of buckle the dust cover incurve shape and become and be used for holding the joint portion of frame.
Like this, only need will separate the net from the bottom of dust cover in the card income buckle joint portion of frame card that the net goes into, during the dismantlement, along the axis of dust cover frame of pulling downwards, just can be with separating the net dismantlement, easy dismounting.
Furthermore, the aperture of the separation net is 4-8 mm.
Like this, great aperture both can the separation great particle diameter the grit, can guarantee again that particle dust can more smoothly pass through the separation net and overflow, and the atomizer of being convenient for sprays the dust fall.
Furthermore, the dust falling cover comprises a left cover body and a right cover body which are symmetrically arranged, flanges which are formed by extending outwards along the radial direction are arranged on the opposite sides of the left cover body and the right cover body, bolt holes are formed in the flanges, and the left cover body and the right cover body are fixedly connected through bolts penetrating through the bolt holes in the flanges.
Therefore, the left cover body and the right cover body can be assembled and installed on the outer side of the drill rod without disassembling the drill rod, and the disassembly and the assembly are convenient and fast.
Furthermore, the net comprises a left net and a right net which are symmetrically arranged.
Like this, can separate the net with a left side and the net is connected in left cover body and right cover body joint respectively with the right side, with left cover body and right cover body amalgamation when installing in the drilling rod outside, the net is separated with the right side on a left side and the net is whole with regard to the amalgamation to be separated the net for the dismouting is more convenient.
Furthermore, the dust fall cover is located the below of guide holder, it is provided with a plurality of bolt holes of arranging along circumference to run through on the guide holder, the top of dust fall cover have a plurality of with the screw hole that the bolt hole corresponds the setting, the dust fall cover passes through the bolt fastening on the guide holder.
Further, the spraying device is arranged in plurality along the circumferential direction of the dust falling cover.
Like this, carry out the dust fall to particle dust from all directions, be favorable to improving the effect of dust fall.
Furthermore, an installation plate perpendicular to the axis is arranged below the dust falling cover, the installation plate is fixedly connected with the dust falling cover through support ribs arranged along the circumferential direction, and the middle of the installation plate is provided with a abdicating hole for a drill rod to pass through; the dust falling cover is characterized in that a plurality of bolt holes arranged along the circumferential direction are arranged on the guide seat in a penetrating mode, a plurality of threaded holes corresponding to the bolt holes are formed in the bottom of the mounting plate, and the dust falling cover is fixedly mounted above the guide seat through bolts penetrating through the bolt holes.
When carrying out the drilling location, the balladeur train is difficult to exempt from and strikes subaerial because of the operation is improper, adopts above-mentioned structure, and the mounting panel through dust fall cover below is installed the dust fall cover in the top of guide holder for the guide holder is located the lower extreme of balladeur train all the time, thereby can avoid dust fall cover and ground collision, is favorable to improving the life who falls the dust cover.
In conclusion, the invention has the advantages of simple and convenient drilling operation, capability of effectively inhibiting dust diffusion, small dust emission, contribution to improving the working environment and the like.
Drawings
FIG. 1 is a schematic structural diagram of a dust-fall down-the-hole drill.
Fig. 2 is a schematic diagram of a half-section structure of the dust falling cover.
Fig. 3 is another half-section structure schematic diagram of the dust falling cover.
Fig. 4 is a schematic structural view of the ram seat and ram assembly portions of fig. 2 and 3.
Detailed Description
The present invention will be described in further detail with reference to examples.
In the specific implementation: as shown in fig. 1 and 2, the dust-fall down-the-hole drill comprises a carriage 11 and a sliding plate 12 which is slidably mounted on the carriage, wherein a rotary assembly 13 is mounted on the sliding plate 12, and a drill rod 15 is mounted at the output end of the rotary assembly 13; a guide seat 14 is vertically installed at the lower end of the carriage 11, a guide hole coaxial with the rotation assembly 13 is formed in the guide seat 14, and the drill rod 15 penetrates through the guide hole; the dust falling cover 2 is arranged on the guide seat 14 and is in a conical shape with a small upper part and a large lower part, and a first through hole for a drill rod to pass through is formed in the top of the dust falling cover 2; the inner wall of the dust falling cover 2 is provided with a spraying device 21, and the spraying device 21 is positioned at the upper part of the dust falling cover 2 and is arranged towards the middle part of the dust falling cover 2 along the oblique lower part; the dust falling cover 2 is also provided with a water inlet communicated with the spraying device 21, and the water inlet is connected with a water supply pump.
Adopt above-mentioned structure, through the installation dust fall cover on the guide holder of balladeur train lower extreme, can carry out preliminary shade to the dust that spills over during the construction, avoid dust loss, simultaneously, the atomizer that utilizes dust fall cover inner wall to set up sprays, just can make dust particle and vaporific water particle combine, promotes dust and subsides to effective dust fall. The dust collecting device is simple in structure, convenient to operate and use, capable of effectively reducing dust diffusion and raising dust, and beneficial to improvement of the operation environment.
In the implementation process, the dust falling cover 2 is also internally provided with a separation net 22 which is arranged in a direction vertical to the axis, and the middle part of the separation net 22 is provided with a second through hole for a drill rod to pass through; the separation net 22 is positioned at the lower part of the dust falling cover 2.
Like this, can separate the great grit of partial particle diameter through separating the net, prevent that the grit from striking dust fall cover and atomizer, be favorable to improving dust cover and atomizer's life. In addition, the large-particle-size sand stone can settle, and after the sand stone is separated, the spraying device only sprays and dusts to the particle dust easy to escape, so that the dustfall effect can be improved, and the water for dustfall is saved.
In implementation, the separation net 22 comprises a frame with a shape consistent with that of the inner hole of the dust falling cover 2, and a net installed on the frame; a plurality of buckles used for fixing the frame are arranged in the dust falling cover 2 along the circumferential direction, and the size of the cross section of the dust falling cover 2 at the buckle position is consistent with that of the frame; the frame is detachably clamped on the clamping buckle.
Because the strength of the separation net is relatively low and the separation net is impacted by the sand with large particle size for a long time, the damage rate of the separation net is relatively high and the separation net needs to be replaced regularly. In the structure, the separation net is detachably arranged in the dust falling cover through the buckle, so that the separation net can be quickly disassembled and assembled conveniently, and the maintenance and the replacement are convenient.
In implementation, the dust hood 2 includes a left hood body and a right hood body which are symmetrically arranged, opposite sides of the left hood body and the right hood body are respectively provided with a flange which extends outwards in the radial direction, the flange is provided with a bolt hole, and the left hood body and the right hood body are fixedly connected through a bolt which passes through the bolt hole on the flange.
Therefore, the left cover body and the right cover body can be assembled and installed on the outer side of the drill rod without disassembling the drill rod, and the disassembly and the assembly are convenient and fast.
In practice, the separation net 22 includes a left separation net and a right separation net which are symmetrically arranged.
Like this, can separate the net with a left side and the net is connected in left cover body and right cover body joint respectively with the right side, with left cover body and right cover body amalgamation when installing in the drilling rod outside, the net is separated with the right side on a left side and the net is whole with regard to the amalgamation to be separated the net for the dismouting is more convenient.
When the dust falling cover is specifically implemented, the whole buckle is U-shaped, and the opening of the buckle faces the middle part of the dust falling cover; the bottom of buckle is along the crooked joint portion that holds of width direction to both sides formation of frame.
During specific implementation, the buckle can also be that the upper end is connected fall on the inner wall of dirt cover 2, the lower extreme with fall and form the bayonet socket between the inner wall of dirt cover 2, the middle part orientation of buckle the curved shape becomes to be used for holding in dust cover 2 the joint portion of frame. Like this, only need will separate the net from the bottom of dust cover in the card income buckle joint portion of frame card that the net goes into, during the dismantlement, along the axis of dust cover frame of pulling downwards, just can be with separating the net dismantlement, easy dismounting.
In practice, the aperture of the separation net 22 is 4-8 mm.
Like this, great aperture both can the separation great particle diameter the grit, can guarantee again that particle dust can more smoothly pass through the separation net and overflow, and the atomizer of being convenient for sprays the dust fall.
In implementation, the dust falling cover 2 is further provided with a mounting plate 23 arranged perpendicular to the axis below, and the mounting plate 23 comprises a left mounting plate and a right mounting plate which are symmetrically arranged; the mounting plate 23 is fixedly connected with the dust falling cover 2 through support ribs 24 arranged along the circumferential direction, and the middle part of the mounting plate 23 is provided with an abdicating hole for a drill rod to pass through; run through on the mounting panel 23 and be provided with a plurality of bolt holes of arranging along circumference, have on the mounting panel 23 a plurality ofly with the screw hole that the bolt hole corresponds the setting, dust falling cover 2 is through passing the bolt fixed mounting of the bolt hole on the guide holder is in the guide holder 14 top.
When carrying out the drilling location, the balladeur train is difficult to exempt from and strikes subaerial because of the operation is improper, adopts above-mentioned structure, and the mounting panel through dust fall cover below is installed the dust fall cover in the top of guide holder for the guide holder is located the lower extreme of balladeur train all the time, thereby can avoid dust fall cover and ground collision, is favorable to improving the life who falls the dust cover.
In practice, the plurality of spraying devices 21 are arranged along the circumferential direction of the dust falling cover 2.
Like this, carry out the dust fall to particle dust from all directions, be favorable to improving the effect of dust fall. In specific implementation, the spraying device is an atomizing nozzle.
During specific implementation, can also adopt the dust hood that falls as the structure shown in fig. 3, fall dust hood 2 and be located the below of guide holder 14, it is provided with a plurality of bolt holes of arranging along circumference to run through on the guide holder, fall dust hood's top have a plurality of with the screw hole that the bolt hole corresponds the setting, fall dust hood passes through the bolt fastening on the guide holder.
When the dust falling cover is implemented, a dust exhaust hole and a dust exhaust pipe 25 connected to the dust exhaust hole are further arranged on the upper cover shell of the dust falling cover 2, and a dust exhaust opening at one end, far away from the dust falling cover 2, of the dust exhaust pipe 25 is bent downwards; the dust falling cover 2 is also internally provided with a suction device 3, so that dust in the dust falling cover 2 can enter the dust exhaust pipe 25 and subside from the dust exhaust port.
Adopt above-mentioned structure, utilize the suction device in the dust fall cover to make the dust that overflows enter into the dust fall cover inside better, avoid the dust to spread from the clearance between dust fall cover and the ground, improve the dust collection effect. Meanwhile, part of dust in contact with the water mist can be conveyed into the dust exhaust pipe by utilizing the suction device, and is fully combined with the water mist in the process of bending along the dust exhaust pipe, so that the specific gravity is increased, and the dust is smoothly settled from the dust exhaust port.
In implementation, the suction device 3 is coaxially arranged in the dust hood 2, and the middle part of the suction device is provided with a hole for a drill rod to pass through; suction device 3 is columnar support body 31 and is annular flabellum 32 including whole, the one end fixed connection of support body 31 is in on the dust cage 2, the other end is installed through the bearing flabellum 32, install the mechanism 4 of holding tightly that is used for holding tightly the drilling rod on the inner race of flabellum 32, make flabellum 32 can rotate along with the drilling rod.
By adopting the structure, the support body and the fan blades are coaxially arranged in the dust-settling cover, the drill rod coaxially penetrates through the support body and the fan blades, the holding mechanism on the inner ring of the fan blades is used for holding the drill rod tightly, the rotation of the drill rod drives the fan blades to rotate together, and the escaped dust can be sucked. This structural design is ingenious, and make full use of drilling rod self pivoted characteristic need not to provide extra drive arrangement, can make the flabellum rotate and realize the suction.
As shown in fig. 4, in implementation, the clasping mechanism 4 includes ejector rod bases 41 uniformly distributed along the circumferential direction of the fan blades 32, and ejector rod assemblies 42 slidably penetrating through the ejector rod bases 41 along the radial direction of the fan blades 32; a spring 43 is further disposed between the ejector rod assembly 42 and the ejector rod base 41, so that the ejector rod assembly 42 moves toward the axis of the fan blade 32.
Thus, the ejector rods uniformly distributed along the circumferential direction of the fan blades are tightly pressed on the drill rod under the action of the spring force, and the fan blades are driven to rotate together along with the rotation of the drill rod.
In implementation, the ejector rod assembly 42 includes two ejector rods arranged along the radial direction of the fan blade 32, one ends of the two ejector rods facing the axis of the fan blade are connected with a rotating shaft, and the rotating shaft is rotatably provided with a roller 45; the other end of the ejector rod penetrates through the ejector rod seat 41 and is provided with a blocking part; the spring 43 is a spiral spring sleeved on the ejector rod; the axis of the roller 45 is perpendicular to the axis direction of the fan blades, an inward concave part formed by inwards and gradually recessing two ends is arranged in the middle of the roller 45, the projection of the inward concave part in the radial direction is arc-shaped, the radius of the inward concave part is consistent with that of the drill rod, and the inward concave part of the roller 45 can be attached to the surface of the drill rod.
Like this, when guaranteeing that gyro wheel and drilling rod laminating messenger's flabellum pivoted, can utilize the rotation of gyro wheel, guarantee that the drilling rod can reciprocate smoothly.
During implementation, a plurality of annular convex edges are uniformly distributed in the inner concave part of the roller 45 along the axial direction, and the height of each convex edge is 0.5-1 mm.
In this way, the friction between the roller and the drill rod in the circumferential direction may be increased.
In implementation, a top plate 44 is further disposed on one side of the ejector rod base 41 facing the axis direction of the fan blades, and two ends of the top plate 44 are provided with holes for the ejector rod to pass through; one end of the spring 43 facing the ejector rod seat 41 abuts on the top plate 44; the center of the jack rod base 41 has a threaded hole that is provided to penetrate toward the top plate 44, and an adjusting bolt that abuts against the top plate 44 is attached to the threaded hole.
By adopting the structure, the top plate can be jacked by the adjusting bolt to compress the spring, and the initial pressure of the spring can be adjusted.
When the fan blade lifting device is used, the ejector rod assembly 42 is arranged towards one end of the axis of the fan blade and inclines upwards for 15-30 degrees.
Due to the fact that the drill rod penetrates through the dust falling cover downwards from the top during assembly, when the drill rod penetrates through the dust falling cover, the downward acting force of the ejector rod assembly can be decomposed in the axial direction of the ejector rod assembly, the ejector rod assembly and the spring retract, and the drill rod can penetrate through the dust falling cover conveniently.
In practice, the end of the dust exhaust pipe 25 where the dust exhaust port is located is a cone with a gradually reduced diameter.
Like this for the part dust that has not contacted water smoke can contact water smoke when the dust exhaust mouth with greater probability yet, is favorable to improving the dust fall effect.
During construction, measuring and marking the position to be grouted, drilling holes at the marked position by using a down-the-hole drill, supplying water to the spraying device by using a water supply pump in the drilling process, enabling dust in the dust falling cover to be in contact with water mist for settlement, and performing static pressure grouting after the drilling is finished.
The above description is only exemplary of the present invention and should not be taken as limiting, and any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A static pressure grouting construction method before pipe jacking construction comprises the following steps: firstly, measuring and marking a position to be grouted, then drilling holes at the marked position by using a down-the-hole drill, and then performing static pressure grouting after drilling the holes; the down-the-hole drill is characterized in that before drilling, the down-the-hole drill with the following structure is obtained, and comprises a sliding frame (11) and a sliding plate (12) which is slidably arranged on the sliding frame, wherein a rotary assembly (13) and a drill rod (15) which is arranged at the output end of the rotary assembly (13) are arranged on the sliding plate (12); a guide seat (14) is vertically installed at the lower end of the sliding frame (11), a guide hole which is coaxial with the rotary assembly (13) is formed in the guide seat (14), and the drill rod (15) penetrates through the guide hole; the dust falling cover (2) with a small upper part and a big lower part and a conical shape is arranged on the guide seat (14), and a first through hole for a drill rod to pass through is formed in the top of the dust falling cover (2); the inner wall of the dust falling cover (2) is provided with a spraying device (21), and the spraying device (21) is positioned at the upper part of the dust falling cover (2) and is arranged towards the middle part of the dust falling cover (2) along the oblique lower part; the dust falling cover (2) is also provided with a water inlet communicated with the spraying device (21), and the water inlet is connected with a water supply pump; during drilling, water is supplied to the spraying device through the water supply pump, so that dust in the dust falling cover is in contact with water mist for settlement; the dust falling cover (2) is also internally provided with a separation net (22) which is arranged in a direction vertical to the axis, and the middle part of the separation net (22) is provided with a second through hole for a drill rod to pass through; the separation net (22) is positioned at the lower part of the dust falling cover (2); a suction device (3) coaxial with the dust falling cover (2) is also arranged in the dust falling cover, and a hole for a drill rod to pass through is formed in the middle of the suction device (3); the suction device (3) comprises a cylindrical frame body (31) and annular fan blades (32), one end of the frame body (31) is fixedly connected to the dust falling cover (2), the other end of the frame body is provided with the fan blades (32) through bearings, and the inner ring of each fan blade (32) is provided with a holding mechanism (4) for holding a drill rod tightly, so that the fan blades (32) can rotate along with the drill rod; the clasping mechanism (4) comprises ejector rod seats (41) which are uniformly distributed along the circumferential direction of the fan blade (32), and ejector rod assemblies (42) which are slidably arranged on the ejector rod seats (41) in a penetrating manner along the radial direction of the fan blade (32); a spring (43) is further arranged between the ejector rod assembly (42) and the ejector rod seat (41), so that the ejector rod assembly (42) moves towards the axis direction of the fan blades (32); the ejector rod assembly (42) comprises two ejector rods arranged along the radial direction of the fan blade (32), one ends of the two ejector rods facing the axis of the fan blade are connected with a rotating shaft, and a roller (45) is rotatably arranged on the rotating shaft; the other end of the ejector rod penetrates through the ejector rod seat (41) and is provided with a blocking part; the spring (43) is a spiral spring sleeved on the ejector rod; the axis of the roller (45) is perpendicular to the axis direction of the fan blades, an inward concave part formed by inwards and gradually recessing two ends is arranged in the middle of the roller, the projection of the inward concave part in the radial direction is arc-shaped, the radius of the inward concave part is consistent with that of the drill rod, and the inward concave part of the roller (45) can be attached to the surface of the drill rod.
2. The static pressure grouting construction method before pipe jacking construction according to claim 1, characterized in that the partition net (22) comprises a frame which is consistent with the shape of the inner hole of the dust hood (2), and a net installed on the frame; a plurality of buckles used for fixing the frame are arranged in the dust falling cover (2) along the circumferential direction, and the cross section of the dust falling cover (2) at the buckle position is consistent with the size of the frame; the frame is detachably clamped on the clamping buckle.
3. The construction method of static pressure grouting before pipe jacking construction according to claim 2, characterized in that the upper end of the buckle is connected to the inner wall of the dust hood (2), a bayonet is formed between the lower end and the inner wall of the dust hood (2), and the middle part of the buckle is bent inwards towards the dust hood (2) to form a clamping part for accommodating the side frame.
4. The static pressure grouting construction method before pipe jacking construction according to claim 1, wherein the aperture of the spacer mesh (22) is 4-8 mm.
5. The pipe jacking pre-pipe-jacking construction method according to claim 2, wherein the dust hood (2) comprises a left hood body and a right hood body which are symmetrically arranged, opposite sides of the left hood body and the right hood body are respectively provided with a flange which extends outwards in a radial direction, the flange is provided with a bolt hole, and the left hood body and the right hood body are fixedly connected through a bolt which passes through the bolt hole on the flange.
6. The construction method of static pressure grouting before pipe jacking according to claim 5, characterized in that the said spacer screens (22) comprise a left spacer screen and a right spacer screen which are symmetrically arranged.
7. The static pressure grouting construction method before pipe jacking construction according to claim 1, characterized in that the dust hood (2) is located below the guide seat (14), a plurality of bolt holes arranged along the circumferential direction are arranged on the guide seat (14) in a penetrating manner, a plurality of threaded holes arranged corresponding to the bolt holes are arranged at the top of the dust hood (2), and the dust hood (2) is fixed on the guide seat (14) through bolts.
8. The pipe jacking pre-pipe-jacking construction method according to claim 1, wherein a plurality of said spray devices (21) are arranged along a circumferential direction of said dust hood (2).
9. The static pressure grouting construction method before pipe jacking construction according to claim 1, characterized in that a mounting plate (23) arranged perpendicular to the axis is further arranged below the dust hood (2), the mounting plate (23) is fixedly connected with the dust hood (2) through support ribs (24) arranged along the circumferential direction, and the middle part of the mounting plate (23) is provided with an abdicating hole for a drill rod to pass through; the dust falling cover is characterized in that a plurality of bolt holes arranged along the circumferential direction are arranged in the mounting plate (23) in a penetrating mode, a plurality of threaded holes corresponding to the bolt holes are formed in the bottom of the mounting plate (23), and the dust falling cover (2) is fixedly mounted on the guide seat (14) through bolts penetrating through the bolt holes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811161198.6A CN109025803B (en) | 2018-09-30 | 2018-09-30 | Static pressure grouting construction method before pipe jacking construction |
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| CN201811161198.6A CN109025803B (en) | 2018-09-30 | 2018-09-30 | Static pressure grouting construction method before pipe jacking construction |
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| CN109025803B true CN109025803B (en) | 2020-04-07 |
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| CN116988764B (en) * | 2023-08-07 | 2024-05-14 | 河南锦源建设有限公司 | Drilling grouting equipment for mining |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202682993U (en) * | 2012-06-28 | 2013-01-23 | 中国十七冶集团有限公司 | Dust exhaust hood for down-hole drill |
| CN104763360B (en) * | 2014-12-22 | 2017-06-13 | 山东大学 | A kind of high pneumatic dth drill orients dust discharge depositing dust cover |
| CN205330582U (en) * | 2016-02-22 | 2016-06-22 | 广东顺德孔山重工机械有限公司 | Dust hood device is caught to slidingtype that down -hole drill used |
| CN205394457U (en) * | 2016-03-11 | 2016-07-27 | 台州立创建设有限公司 | Fitment usefulness connect dirt device |
| CN206111086U (en) * | 2016-08-31 | 2017-04-19 | 长沙黑金刚实业有限公司 | Down --hole drill |
| CN207892525U (en) * | 2017-09-28 | 2018-09-21 | 长沙黑金刚实业有限公司 | A kind of down-the-hole drill |
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