CN102720461B - Grout stopping method and grout stopping device for hydraulic drill jumbo - Google Patents
Grout stopping method and grout stopping device for hydraulic drill jumbo Download PDFInfo
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- CN102720461B CN102720461B CN201210190465.9A CN201210190465A CN102720461B CN 102720461 B CN102720461 B CN 102720461B CN 201210190465 A CN201210190465 A CN 201210190465A CN 102720461 B CN102720461 B CN 102720461B
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Abstract
The invention relates to the technical field of surrounding rock boring in fractured weak zones under seabed and river-crossing environments and discloses a grout stopping method and a grout stopping device for a hydraulic drill jumbo. The grout stopping method includes using the grout stopping device to stop grout. The grout stopping device comprises a pressure pipe, a pair of stop-grouting plugs, a hydraulic cylinder, a casing and a seal gasket. The stop-grouting plugs are arranged on two sides inside the casing. The stop-grouting plugs on two sides are respectively connected with a piston rod of the symmetrical hydraulic cylinder, which penetrates through the casing and is fixed outside. The pressure pipe used for axially pressing the stop-grouting pistons is disposed at one end of the casing and is connected with the casing in a threaded manner. The seal gasket and an orifice pipe are arranged at the other end of the casing and are fixedly connected with the casing through bolts. The grout stopping method and the grout stopping device are simple for grouting and convenient for remote control. Construction cost can be reduced, work efficiency can be improved, construction period can be shortened, the requirements of market on construction period and cost are met, positive social benefit and economic benefit for environment protection are achieved, and integral drilling and grouting construction by the jumbo can be achieved.
Description
[skillart field]
The present invention relates to seabed, cross weak broken band country rock hole creating technology field under the environment of river, relate in particular to a kind of hydraulic drill ring grouting method and grouting device.
[background technology]
At present, the B353E jumbo of Atlas Copco company production is simple to operate with it in constructing tunnel, mobile rapidly, rate of penetration is fast and accurate, maintaining is conveniently widely used in method of tunnel drilling and blasting construction.But B353E jumbo major function is blasthole drilling, the very little other field that is applied in.And in construction particularly in seabed, while crossing under the environment such as river operation: often can encountering weak broken band country rock, to meet water easily softening, disintegration, even trickling, cause boring collapse hole, pore-forming difficulty, for guaranteeing grouting consolidation effect, the normal segmentation protrusive grouting process that adopts, but there is hole-bottom slurry-injection weak effect in the slip casting of segmentation protrusive, boring repeatedly, repeatedly slip-casting, construction technology is more loaded down with trivial details, the shortcoming that workload is large, can fundamentally solve problems and bore note integrated construction, therefore also carry out continuous exploratory development both at home and abroad, only have at present Japanese multifunctional drill RPD series really to accomplish to bore note integrated construction, technology is relatively ripe.China need to also propose to bore integrated this concept of note according to construction in recent years, and a lot of units are also constantly attempting and putting into practice, but effect is not satisfactory, was boring note integrated construction field China substantially also in blank out.If can be applied on B353E chassis boring the integrated advantage of note, B353E chassis can address the above problem well and not lose his original speciality in brill note integrated construction.Due to the shortcomings such as three arm rock drilling jumbos bore " overfall " grouting technical barrier existing in note integrated construction slip casting process, and in simple and easy stop grouting plug construction, bolt and drilling rod are dismantled often, and operation conversion is frequent, grouting weak effect.
[summary of the invention]
In order to overcome the deficiency in background technology, the invention provides a kind of hydraulic drill ring grouting method and grouting device, thoroughly solve the grouting technical barrier that three arm rock drilling jumbos bore " overfall " that exist in note integrated construction slip casting process, improve three arm chassis and bored note integrated construction speed, shorten the construction period, have cost low, be easy to processing, workable, grouting is effective.
In order to realize foregoing invention object, the present invention adopts following technical scheme:
A kind of hydraulic drill ring auto-stopping sizing device, comprise: pressure pipe, stop grouting plug, hydraulic jack, sleeve pipe, sealing mat, in described sleeve pipe, be provided with a pair of stop grouting plug that is positioned at drilling rod both sides, the stop grouting plug of both sides is connected with the piston rod of the symmetrical hydraulic jack of fixing outward through sleeve pipe respectively; Described sleeve pipe one end is provided with the pressure pipe for axial compression stop grouting plug, pressure pipe and sleeve pipe screwed connection; The sleeve pipe other end is provided with sealing mat, orifice tube, and orifice tube, sealing mat are fixedly connected with sleeve pipe by bolt.
This hydraulic drill ring auto-stopping sizing device, described pressure pipe, for rotation pressure pipe, is connected and composed by rotation platen and some handles, on the periphery wall of rotation platen, is provided with the screw thread being connected with sleeve pipe, on the wall of rotation platen periphery without screw thread, is evenly equipped with some handles; Described rotation platen center is provided with the drilling rod circular hole that is greater than shank diameter, is provided with uniform slurries circular hole in the periphery in round bar hole.
This hydraulic drill ring auto-stopping sizing device, described sleeve pipe is outside equipped with the symmetrical support of fixed hydraulic oil cylinder, and sleeve pipe one end is provided with the flanged plate of connection corresponding to orifice tube; Sleeve pipe one another end is provided with the screw thread being connected with pressure pipe.
This hydraulic drill ring auto-stopping sizing device, the stop grouting plug of described both sides is combined into compacting device, and each stop grouting plug is semicircular structure; The planar central setting of described stop grouting plug to press depression diameter identical with drill pipe diameter, the cambered surface of described stop grouting plug is provided with the locking device of fixed hydraulic cylinder piston rod.
This hydraulic drill ring auto-stopping sizing device, described stop grouting plug is that resin is synthetic, it is 50Mpa that material maximum is born pressure.
This hydraulic drill ring auto-stopping sizing device, described orifice tube is connected and composed by body and flanged plate.
This hydraulic drill ring auto-stopping sizing device, described hydraulic jack stroke be >(100-50)/2mm and the stroke 20mm of fixed station and the stroke sum of surplus, oil cylinder need stroke be 40-50mm.; The pressure of described hydraulic jack is: maximum pressure is 7Mpa.
The automatic grouting construction method of a kind of hydraulic drill ring, its step is as follows:
1, grouting device is installed,
(1) flange on the sleeve pipe of grouting device 4 is connected with the flange on orifice tube 6, and between two flange, press from both sides one deck high pressure rubber seal washer 5, then be fixedly connected with bolt, in mortar depositing construction process, prevent that the slurries between orifice tube 6 and sleeve pipe 4 from overflowing;
(2) at the inwall brushing lubrication oil of stop grouting plug 2, for the inwall of lubricated stop grouting plug;
(3) drilling rod 7 is passed from stop grouting plug 2 and pressure pipe 1, tighten drill bit 8, then pressure pipe 1 is arranged on sleeve pipe 4 by screwed connection; Reserved 5～the 10cm of grid permeable hole in pressure pipe 1 is long, guarantees that deslagging is unimpeded;
(4) orifice tube 6 inserting in injected hole is fixed with injected hole aperture;
2, in hole flushing, mud jacking, chemical cleaning project, the execution conditions of grouting device,
(1) in boring procedure, when meeting water burst, single hole water yield is greater than 10m3/h, makes stop grouting plug 2 radial clamping drilling rods by symmetrical hydraulic jack 3, by advancing pressure pipe, axial compression stop grouting plug 2, shutoff orifice tube 6 water bursts;
(2) in mud jacking construction, hold drilling rod after slurries solidify tightly, drilling rod cannot exit injected hole, axially unclamps rapidly pressure pipe 1, radially unclamps the stop grouting plug 2 that clamps drilling rod by symmetrical hydraulic jack 3, and drilling rod is exited; Drilling rod exits employing and can hole forward, and also can rotate time, cutting shelves are lived an anti-teeth drill bit for obstruction backward, has avoided stifled brill and the bit freezing of slurries, makes the drilling rod can be free to advance or retreat under any state of boring slip casting, prevents that slurries from embracing brill;
(3) after slip casting finishes, unclamp slip casting tube head, then axially unclamp pressure pipe 5～10cm, radially unclamp the stop grouting plug 2 that clamps drilling rod, open flushing cinder system, for next section of injected hole creeps into Job readiness;
3, the construction working method of grouting device hydraulic system,
A. preparation, the hydraulic pressure oil of main system enters into hand-operated direction valve 13 through system oil inlet pipe P, flow control valve 9:
B. stop grouting plug 2 compresses drilling rod 7, in the time that hydraulic cylinder piston rod stretches out, hand-operated direction valve 13 pushes away forward, and hydraulic oil enters reducing valve 10, and post-decompression hydraulic oil enters hydraulic lock 12, then enter in the large chamber of hydraulic jack 3, under the effect of hydraulic pressure, the piston rod of hydraulic jack 3 is stretched, and makes stop grouting plug 2 deformable seals compress drilling rod 7, seal up the slurries of injection, forbid that slurry stream goes out outside orifice tube;
C. simultaneously by pressure pipe 1 by putting the rotation of steel pipe on handle, axial compression stop grouting plug 2;
D. stop grouting plug unclamps drilling rod, in the time that the piston rod of hydraulic jack 3 is retracted, hand-operated direction valve 5 is toward pulling back, and hydraulic circuit commutates, and walks to enter the loculus hydraulic circuit of hydraulic jack 3, hydraulic oil enters reducing valve 10, post-decompression hydraulic oil enters hydraulic lock 12, then enters in hydraulic jack 3 loculuses, and the piston rod of hydraulic jack 3 is return, stop grouting plug 2 unclamps drilling rod 7, allows drilling rod, drill bit, adapter sleeve axially move;
E. when slurries solidify, when the pressure pipe 1 of grouting device cannot retreat, can on pressure pipe 1 handle, put steel pipe and increase rotation torque, pressure pipe 1 rotation is retreated.
Owing to adopting technical scheme as above, the present invention has following superiority:
A kind of hydraulic drill ring grouting method and grouting device are in the situation of the reservation original performance of B353E chassis and function, B353E chassis being modified into and boring note integration apparatus.The key technology difficult problem " grouting device " that runs in development is launched relevant discussion and technical research, final Development and design produce cost low, be easy to processing, workable hydraulic pressure aperture " grouting device ".Thoroughly solve the grouting technical barrier that three arm rock drilling jumbos bore " overfall " that exist in note integrated construction slip casting process, be that in the construction of simple and easy stop grouting plug, bolt and drilling rod are dismantled often, the shortcomings such as operation conversion is frequent, the present invention has greatly improved three arm chassis and has bored note integrated construction speed, shorten the construction period, cost-saving, reach grouting effect.The present invention has following characteristic:
1. grouting device adopts hydraulic control, simple to operate, and remote control is convenient.When boring, cleaning bottom of hole, operate hydraulic control valve stop grouting plug is unclamped, hole; When slip casting, operating hydraulic control valve compresses stop grouting plug to carry out slip casting.
2. stop grouting plug processing request is higher, reliable in quality, have wear-resisting, withstand voltage, corrosion resistance is strong.
3. hydraulic jack adopted and is flexibly connected (not being fixedly connected with) with being connected of stop grouting plug, after oil cylinder is installed, in stop grouting plug insertion groove, can well be connected with hydraulic jack, and the step that so greatly simplifies the operation, has also increased stop grouting plug activity and deformation space.
4. sleeve pipe, pressure pipe machining accuracy are high, and structural strength is strong, process for machining and manufacturing complexity.
5. package unit installation and removal are convenient, when installation, first stop grouting plug, hydraulic jack, pressure pipe, sleeve pipe etc. assembled, and then entirety is docked with mounted orifice tube, then connects control oil pipe.Contrary with above-mentioned steps while pulling down.
The present invention is through boring the boring of note integrated treatment, and the integrality of boring is better, occurs without collapse hole phenomenon, can carry out the disposable slip casting in full hole or the slip casting of segmentation protrusive is processed again by aperture, guarantees slip casting effect,
The present invention is based on tunnel share chassis company successfully uses chassis to implement on the basis of rapid drilling slip casting at Jiaozhou Bay of Qingdao seabed tunnel, further three arm rock drilling jumbo functions are excavated and are used the further expansion in field, meet market to the engineering construction duration, the requirement of cost, the present invention is directed to construction arm of three arm chassis transforms, customized or introduce brand-new drilling system, solve the technical barrier that three arm rock drilling jumbos bore the integrated existence of note, improve three arm rock drilling jumbo capacity utilization and diversity, make chassis can simultaneous adaptation in different geology sections and all kinds of grouting construction process.The present invention can be cost-saving; raising work efficiency, reduction of erection time, protection of the environment have extremely positive Social benefit and economic benefit; realize the brill note integrated construction of chassis; can also make three-arm hydraulic wagon drill have a qualitative leap in boring slip casting field, also certainly will create wide influence power and good economic benefits more.
[brief description of the drawings]
Fig. 1 is grouting apparatus structure schematic diagram;
Fig. 2 is grouting device hydraulic system schematic diagram;
Fig. 3 is that grouting device hydraulic system accesses the block diagram that three arm rock drilling jumbo hydraulic systems connect;
Fig. 4 is the brill note integrated construction flow chart with grouting device;
In figure: 1, pressure pipe, 1.1, rotation platen, 1.2, handle, 2, stop grouting plug, 2.1, press depression, 2.2, locking device, 3, hydraulic jack, 4, sleeve pipe, 4.1, support, 4.2, flanged plate, 5, seal washer, 6, orifice tube, 7, drilling rod, 8, drill bit, 9, flow control valve, 10, reducing valve, 11, pressure meter, 12, hydraulic lock, 13, hand-operated direction valve, system oil inlet pipe P, system low discharge oil return pipe D, system oil return pipe T.
[detailed description of the invention]
As shown in Figure 1,2,3, 4, a kind of hydraulic drill ring grouting device, comprise: pressure pipe 1, stop grouting plug 2, hydraulic jack 3, sleeve pipe 4, seal washer 5 and orifice tube 6, in described sleeve pipe 4, be provided with a pair of stop grouting plug 2 that is positioned at drilling rod 7 both sides, the stop grouting plug 2 of both sides is connected with the piston rod through the outer fixing symmetrical hydraulic jack 3 of sleeve pipe 4 respectively; Described sleeve pipe 4 one end are provided with the pressure pipe 1 for axial compression stop grouting plug, pressure pipe 1 and sleeve pipe 4 screwed connections; Sleeve pipe 4 other ends are provided with seal washer 5, orifice tube 6, and orifice tube 6, seal washer 5 are fixedly connected with sleeve pipe 4 by bolt.
Described pressure pipe 1, for rotation pressure pipe, is connected and composed by rotation platen 1.1 and some handles 1.2, on the periphery wall of rotation platen 1.1, is provided with the screw thread being connected with sleeve pipe 4, on the wall of rotation platen 1.1 periphery without screw threads, is evenly equipped with some handles 1.2; Described rotation platen 1.1 centers are provided with the bar hole that is greater than drill pipe diameter, on the rotation platen 1.1 of a week of bar hole, are evenly equipped with slurries circular hole.Pressure pipe: be arranged on grouting device rearmost end, its effect is axial compression stop grouting plug.
Described sleeve pipe 4 is outside equipped with the symmetrical support 4.1 of fixed hydraulic oil cylinder, and sleeve pipe one end is provided with the flanged plate 4.2 of connection corresponding to orifice tube 6; Sleeve pipe one another end is provided with the screw thread being connected with pressure pipe 1.Sleeve pipe mainly plays fixing, connecting elements.
The stop grouting plug 2 of described both sides is combined into compacting device, and each stop grouting plug 2 is semicircular structure; The planar central setting of described stop grouting plug 2 to press depression 2.1 diameters identical with drilling rod 7 diameters, the cambered surface of described stop grouting plug 2 is provided with the locking device 2.2 of fixed hydraulic cylinder piston rod.Stop grouting plug is arranged in sleeve pipe, and its effect is the slurries that seal up injection, forbids that it flows out outside orifice tube.
Described stop grouting plug 2 is that resin is synthetic, and it is 50Mpa that material maximum is born pressure.
Described orifice tube 6 is connected and composed by body and flanged plate.
Hydraulic drill ring auto-stopping sizing device, the stroke of described hydraulic jack 3 is for being greater than the stroke 20mm of (100-50)/2mm and fixed station and the stroke sum of surplus, and the stroke that oil cylinder needs is 40-50mm.; The pressure of described hydraulic jack is: maximum pressure is 7Mpa.Hydraulic jack: be arranged on sleeve pipe, be connected with stop grouting plug, its effect is to compress stop grouting plug under the effect of hydraulic pressure, makes stop grouting plug deformable seal live slurries.
Grouting device of the present invention adopts hydraulic control, simple to operate, and remote control is convenient:
When boring, cleaning bottom of hole, operation hydraulic control valve unclamps stop grouting plug, holes; When slip casting, operating hydraulic control valve compresses stop grouting plug to carry out slip casting.Stop grouting plug processing request is higher, reliable in quality, have wear-resisting, withstand voltage, corrosion resistance is strong;
Hydraulic jack adopted and is flexibly connected (not being fixedly connected with) with being connected of stop grouting plug, after oil cylinder is installed, in stop grouting plug insertion groove, can well be connected with hydraulic jack, and the step that so greatly simplifies the operation, has also increased stop grouting plug activity and deformation space
The installation and removal of this grouting device are convenient, when installation, first stop grouting plug, hydraulic jack, pressure pipe, sleeve pipe etc. assembled, and then entirety is docked with mounted orifice tube, then connects control oil pipe.Contrary with above-mentioned steps when dismounting
Hydraulic jack model is determined
Be 50mm according to definite drill pipe diameter, drilling rod adapter sleeve diameter is 76mm, and bit diameter is≤100mm.The object of stop grouting plug is to embrace drilling rod, blocks slurries and flows out from drilling rod.Thereby circular diameter is exactly the diameter 50mm. of drilling rod and in the time that drill bit need to be by stop grouting plug, grouting device need to unclamp in it can determine stop grouting plug sealing state time, until circular diameter is greater than the diameter of drill bit in stop grouting plug, interior circular diameter must be greater than 100mm.Thereby the stroke that can determine hydraulic jack is greater than (100-50)/2mm, hydraulic jack is installed to needs fixed hydraulic oil cylinder on grouting device, fixed hydraulic oil cylinder need to design fixed station, thereby must increase oil cylinder stroke, show that as calculated it is 20mm that fixed station need to increase oil cylinder stroke, add and leave certain surplus, determine that the stroke that oil cylinder needs is that 50mm. oil cylinder working-pressure is determined: stop grouting plug is that to bear pressure be 50Mpa to resin Composite maximum, the maximum pressure that hydraulic system can provide is 25Mpa, hydraulic jack effect is that piston rod stretches out extruding stop grouting plug, as long as can hold drilling rod tightly, there is certain distortion, seal up slurries, pressure does not need too large, consider cost performance finally determine its maximum pressure be 7Mpa.
When the slip casting of hydraulic jack extruding stop grouting plug, stop grouting plug is not allow to become flexible, and needs hydraulic jack hydraulic circuit design hydraulic lock.System pressure is 25Mpa, and oil cylinder maximum pressure only needs 7Mpa pressure, thereby need to design reducing valve with protection hydraulic jack to hydraulic circuit, guarantees that system pressure stablizes constantly, can obtain again post-decompression steady pressure.Other aspects need to be equipped with the flexible of manual operation reversal valve control hydraulic jack, flow control valve, pressure meter, hydraulic oil pipe.
The automatic grouting construction method of hydraulic drill ring, its step is as follows:
1, grouting device is installed,
(1) sleeve pipe of grouting device 4 upper flange plates are connected with orifice tube 6 upper flange plates, and between two flange, press from both sides one deck high pressure rubber seal washer 5, then be fixedly connected with bolt, in mortar depositing construction process, prevent that the slurries between orifice tube 6 and sleeve pipe 4 from overflowing;
(2) at the inwall brushing lubrication oil of stop grouting plug 2, for the inwall of lubricated stop grouting plug;
(3) drilling rod 7 is passed from stop grouting plug 2 and pressure pipe 1, tighten drill bit 8, then pressure pipe 1 is arranged on sleeve pipe 4 by screwed connection, in pressure pipe 1, the reserved 5～10cm of grid permeable hole is long, guarantees that deslagging is unimpeded;
(4) orifice tube 6 inserting in injected hole is fixed with injected hole aperture;
2, in hole flushing, mud jacking, chemical cleaning project, the execution conditions of aperture grouting device,
(1), in boring procedure, when meeting water burst, single hole water yield is greater than 10m3/h, by hydraulic jack 3 radial clamping stop grouting plugs 2, then axial advance pressure pipe 1, shutoff aperture piping water;
Wherein, stop grouting plug radial clamping refers to realize the radially compression to drilling rod of stop grouting plug by the stretching motion of hydraulic jack, and stop grouting plug axial compression is referred to by rotation pressure pipe, pressure pipe being rotated realizes stop grouting plug axial compression.
(2) in mud jacking construction, hold drilling rod after slurries solidify tightly, drilling rod cannot exit injected hole, axially unclamps rapidly pressure pipe 1, radially unclamps the stop grouting plug 2 that clamps drilling rod by symmetrical hydraulic jack 3, and drilling rod is exited; Drilling rod exits employing and can hole forward, and also can rotate time, cutting shelves are lived an anti-teeth drill bit for obstruction backward, has avoided stifled brill and the bit freezing of slurries, makes the drilling rod can be free to advance or retreat under any state of boring slip casting, prevents that slurries from embracing brill; As there is other hole grout leaking, can close this grout leaking hole and continue slip casting, if but occur when frequent, can unclamp grouting device pressure pipe, continue to creep into next section, guarantee that slurries solidify in wall-rock crack, also can be by slurry injection technique or shorten the method for gel time and carry out shutoff by adjusting grout coordinate ratio at intermittence;
(3) after slip casting finishes, unclamp slip casting tube head, then axially unclamp pressure pipe 5～10cm, radially unclamp the stop grouting plug 2 that clamps drilling rod, open flushing cinder system, for next section of injected hole creeps into Job readiness;
3, the construction working method of grouting device hydraulic system,
A. preparation, the hydraulic pressure oil of the system oil inlet pipe P of main system enters into hand-operated direction valve 13 through flow control valve 9: hand-operated direction valve 13Yi road and reducing valve 10 UNICOMs, reducing valve 10 another roads and system low discharge oil return pipe D UNICOM; Hand-operated direction valve 13 another roads and hydraulic lock 120 UNICOMs, hand-operated direction valve 13 oil return lines and system oil return pipe T UNICOM;
B. stop grouting plug 2 compresses drilling rod 7, need hydraulic cylinder piston rod to stretch out, hand-operated direction valve 13 pushes away forward, and hydraulic oil enters reducing valve 10, and post-decompression hydraulic oil enters hydraulic lock 12, then enter in the large chamber of hydraulic jack 3, under the effect of hydraulic pressure, the piston rod of hydraulic jack 3 is stretched, and makes stop grouting plug sealing 2 distortion compress drilling rod 7, seal up the slurries of injection, forbid that slurry stream goes out outside orifice tube; The flow direction of hydraulic oil while being stop grouting plug compression;
C. use pressure pipe 1 by the rotation of handle, axial compression stop grouting plug 2 simultaneously;
D. stop grouting plug unclamps drilling rod, need the piston rod of hydraulic jack 3 to retract, hand-operated direction valve 5 is toward pulling back, hydraulic circuit commutation, hydraulic oil enters hydraulic lock 12, then enters in hydraulic jack 3 loculuses, and the piston rod of hydraulic jack 3 is return, stop grouting plug 2 unclamps drilling rod 7, allows drilling rod, drill bit, adapter sleeve axially move; It is the flow direction of stop grouting plug hydraulic oil while unclamping;
E. when slurries solidify, when the pressure pipe 1 of grouting device cannot retreat, can on pressure pipe 1 handle, put steel pipe and increase rotation torque, pressure pipe 1 rotation is retreated.
Hydraulic drill ring auto-stopping paste-making method, described hydraulic jack stroke be: be greater than the stroke 20mm of (100-50)/2mm and fixed station and the stroke sum of surplus, oil cylinder need stroke be 40-50mm.; The pressure of described hydraulic jack is: maximum pressure is 7Mpa.
Described stop grouting plug hydraulic control system is incorporated to B353E hydraulic drill ring DCS18 hydraulic system, the oil-feed oil circuit of stop grouting plug hydraulic control system is connected into the main oil feeding line in DCS18 hydraulic system, and the oil return circuit of stop grouting plug hydraulic control system is incorporated to the main oil return circuit in DCS18 hydraulic system;
1,, while work, stop grouting plug hydraulic control system flow affects DCS18 hydraulic system
Stop grouting plug hydraulic control system flow when work,
When piston rod stretches out the flow Q of (extruding stop grouting plug) stretch=(A1-A2) V stretches,
Return=A1 × the V of flow Q that (unclamps stop grouting plug) when piston rod is return returns.
According to overall dimensions D × L=50 × 80 of oil cylinder, d=30mm, known:
Without bar oil pocket effective active area A1=3.14 × (5/2) × (5/2)=19.6cm2;
There is bar oil pocket effective active area A2=3.14 × (3/2) × (3/2)=7.1cm2.
Suppose that it is 3.6m/min (0.06m/s) that piston rod is return the speed of unclamping stop grouting plug,
Suppose piston rod stretch out extruding stop grouting plug speed be 0.2---1.2m/min (0.02m/s).
: stretch=(A1-A2) stretch=(19.6-7.1) × 0.02 × 60 × 0.1=1.5L/min of V of Q
Return=19.6 × 0.06 × 60 × 0.1=7.06L/min of return=A1 × V of Q
2,, while work, stop grouting plug hydraulic control system input power affects DCS18 hydraulic system
Stop grouting plug hydraulic control system when work maximal input is the power of oil cylinder while bearing maximum pressure extruding stop grouting plug;
Squeeze+p the back of the body of P=(p) × Q stretches
(the p back of the body refers to that the loss of total pressure of hydraulic oil-returning oil circuit, native system are that its back pressure value of general underloading Metering Flow Control Circuits is got 0.5MPa). be P=(squeeze+p of p carries on the back A2/A1) Q=(5+0.5 × 7.1/19.6) × 106 × 0.25 × 0.001=1.3KW
3, stop grouting plug hydraulic control system theory structure affects DCS18 hydraulic system,
Hydraulic oil shunts out laggard inbound traffics control valve from main system, reduce after traffic flow, enter in 3-position 4-way operating valve, the Median Function that this 3-position 4-way operating valve is selected is O type, so hydraulic fluid port is totally-enclosed when this operating valve meta. when system stops, be very little on the impact of DCS18 hydraulic system;
The adjusting of system pressure size changes after reducing valve pressure regulation, the Main Function of reducing valve is the oil liquid pressure of a certain branch road in reduction system, make same system can have the loop of two or more different pressures, so do not affect the pressure of main system. stop grouting plug hydraulic control system pressure is also very little, negligible on the impact of DCS18 hydraulic system.
Construction technology:
1, construction flow chart
Bore note integrated construction technique more complicated, divide different slip casting sections according to country rock geological conditions, plant equipment situation, in construction, need constantly to creep into (or retreating), slip casting, and then creep into (or retreating), then slip casting.Process chart in detail as shown in Figure 4.
2, construction sequence (taking the slip casting of segmentation protrusive as example)
(1) when T-Z-D aperture grouting device casing flange dish is connected with orifice tube flange, between two flange, press from both sides one deck high pressure rubber packing ring, guarantee does not have slurries to overflow between orifice tube and sleeve pipe in mortar depositing construction process, then adopts Ф 10mm plain bolt to connect;
(2) use hexagon socket head cap screw that stop grouting plug and pressure pipe are connected into an entirety, for guaranteeing certain lubricity, be coated with and brush one times butter at the inwall of stop grouting plug, or used oil also can;
(3) T76 drilling rod is passed from stop grouting plug and pressure pipe, tighten drill bit, then pressure pipe is arranged on sleeve pipe, reserved 5～10cm is long for grid permeable hole, guarantees that deslagging is unimpeded;
(4) injected hole creeps into, three arm rock drilling jumbo propelling pressure 40～60bar, surge 190～210bar, rotational pressure 50bar left and right;
(5) according to design and country rock transmission coefficient mixing slurries, conventional have light water mud, superfine cement slurry and C-S biliquid to starch, slurry water gray scale and gel time are most important on boring the impact of note integrated construction, and suitable grout coordinate ratio data can be determined by test in scene;
(6) chassis creeps into set depth, hydraulic pressure is adjusted to maximum, and push-and-pull drilling rod carries out hole flushing back and forth, if unfavorable geologies such as rock crusher or strong-weathered rock and powder fine sands, can use blast or hydraulic pressure and blast hybrid mode to carry out hole flushing, guarantee effective diffusion of slurries;
(7) after hole flushing finishes, tighten pressure pipe, slip casting tube head is installed, by water wind liquid conversion equipment, carry out drilling rod mud jacking through T76 drilling rod.
(8) after slip casting finishes, unclamp slip casting tube head and clean, guaranteeing to use next time.Then unclamp pressure pipe 5～10cm, open flushing cinder system, carry out next section of injected hole and creep into work, then repeat above-mentioned process operations;
(9), after this hole slip casting finishes, can carry out mud jacking again according to aperture water outlet situation.Because this aperture bores note integrated treatment, the integrality in hole is better, occurs without collapse hole phenomenon, can carry out the disposable slip casting in full hole or the slip casting of segmentation protrusive is processed again by aperture, guarantees slip casting effect,
(10) chassis moves arm, carries out other hole constructions.
Construction precautions
(1) the front staff of brill note integrated construction can understand the working mechanism of aperture grouting device, guarantees skilled operation and maintenance in work progress;
(2), in construction, particularly biliquid slurry construction, except accurate calculating slurries are in the setting time of Flows, also to guarantee drilling rod different rotation in construction, prevent that slurries from embracing brill, as run into this type of situation, unclamp rapidly pressure pipe, exit drilling rod, and clear up;
(3) in boring procedure as water burst, single hole water yield is less than 2m3/h, continues to creep into; If the water yield, at 2～5m3/h, is noted observing water quantity situation of change, and notifies on-the-spot operator on duty, determine whether slip casting; If the water yield at 5～10m3/h, stops creeping into, exit drilling rod, carry out slip casting; If the water yield is greater than 10m3/h, can advance in advance pressure pipe, shutoff aperture piping water, and then decide through consultation treatment measures;
(4) before slip casting, first carry out slip casting field trial, in practice of construction, adjust in time as the case may be grouting parameter by field trial, to obtain good grouting consolidation effect;
(5) mixing of slurries meets design and corresponding code requirement;
(6) after grouting pipeline connects, close slurry-inlet valve, open the seal of the first setting-out inspection grouting pipeline of relief valve and grouting device, various connections must be firmly, prevents from throwing off and hurting sb.'s feelings under high pressure;
(7) in slip casting process, as there is other hole grout leaking, can close this grout leaking hole and continue slip casting, if but occur when frequent, can unclamp grouting device pressure pipe, continue to creep into next section, guarantee that slurries solidify in wall-rock crack, also can be by slurry injection technique or shorten the method for gel time and carry out shutoff by adjusting grout coordinate ratio at intermittence, if but when invalid, can suspend this hole slip casting, analyze reason, take other measure;
(8) in slip casting process, keep grouting pipeline unimpeded, prevent from affecting because of pipeline blockage the judgement of slip casting ending standard, the each parts of grouting device, slip casting connector, pipeline should often clean up, to reuse next time;
(9), because slurries solidify, when the rotation pressure pipe of grouting device cannot retreat, can on pressure pipe handle, put steel pipe and increase rotation torque.
(10) boring, the relevant operating regulation of the skilled grasp of slip casting personnel, forbid carrying out any repairing in the situation that not shutting down tool, grouting pump and pipeline inner pressure are not down to 1 o'clock, must not remove pipeline or unclamp pipe joint, in order to avoid slurries ejections hurts sb.'s feelings, unclamping immediately pressure pipe after forbidding firm slip casting to finish, rig and grouting pump are responsible for operation by special messenger, without agreeing to that other people must not operate, slip casting personnel wear safety goggles in the time tearing pipeline, loose pressure pipe, operation grouting pump open, in case slurries are splashed into eyes;
(11) note Electrical Safety, power supply for construction adopts built on stilts processing, and earth leakage protective device is installed;
(12) reinforcement constructor's awareness of safety, carries out operation safety training before hilllock, and the personnel of marching into the arena must take appointment with certificate, and before marching into the arena, must wear the protective articless such as safety helmet, raincoat, respirator;
(13) carry out on-the-spot waste discharge and environmental protection work;
(14) face should have sacurity alarm system and communication system, once dangerous situation appears in other face, starts rapidly emergency mechanism, organizes Field Force to withdraw;
(15) in work progress, summarize in time, the problem of finding is inquired into and improved in time, guarantee the constantly perfect of aperture grouting device, improve and bore note integrated construction technical level.
Claims (8)
1. a hydraulic drill ring grouting device, it is characterized in that: comprising: pressure pipe (1), stop grouting plug (2), hydraulic jack (3), sleeve pipe (4), seal washer (5) and orifice tube (6), in described sleeve pipe (4), be provided with a pair of stop grouting plug (2) that is positioned at drilling rod (7) both sides, the stop grouting plug (2) of both sides is connected respectively with through the piston rod of the outer fixing symmetrical hydraulic jack (3) of sleeve pipe (4); Described sleeve pipe (4) one end is provided with the pressure pipe (1) for axial compression stop grouting plug, pressure pipe (1) and sleeve pipe (4) screwed connection; Sleeve pipe (4) other end is provided with seal washer (5), orifice tube (6), and orifice tube (6), seal washer (5) are fixedly connected with sleeve pipe (4) by bolt.
2. hydraulic drill ring grouting device according to claim 1, it is characterized in that: described pressure pipe (1) is rotation pressure pipe, connected and composed by rotation platen (1.1) and some handles (1.2), on the periphery wall of rotation platen (1.1), be provided with the screw thread being connected with sleeve pipe (4), on the wall of rotation platen (1.1) periphery without screw thread, be evenly equipped with some handles (1.2); Described rotation platen (1.1) center is provided with the bar hole that is greater than drill pipe diameter, on the rotation platen (1.1) of a week of bar hole, is evenly equipped with slurries circular hole.
3. hydraulic drill ring grouting device according to claim 1, is characterized in that: described sleeve pipe (4) is outside equipped with the symmetrical support (4.1) of fixed hydraulic oil cylinder, and sleeve pipe one end is provided with the flanged plate (4.2) with the corresponding connection of orifice tube (6); Sleeve pipe one another end is provided with the screw thread being connected with pressure pipe (1).
4. hydraulic drill ring grouting device according to claim 1, is characterized in that: the stop grouting plug (2) of described both sides is combined into compacting device, for sealing up the slurries of injection, forbids that it flows out outside orifice tube; Each stop grouting plug (2) is semicircular structure; The planar central setting of described stop grouting plug (2) to press depression (2.1) diameter identical with drilling rod (7) diameter, the cambered surface of described stop grouting plug (2) is provided with the locking device (2.2) of fixed hydraulic cylinder piston rod.
5. hydraulic drill ring grouting device according to claim 1, is characterized in that: described stop grouting plug (2) is that resin is synthetic, and it is 50Mpa that material maximum is born pressure.
6. hydraulic drill ring grouting device according to claim 1, is characterized in that: described orifice tube (6) is connected and composed by body and flanged plate.
7. hydraulic drill ring grouting device according to claim 1, it is characterized in that: the stroke of described hydraulic jack (3) is: the stroke of oil cylinder needs is 40-50mm, i.e. the stroke 20mm of being calculated as of oil cylinder stroke: > (100-50)/2mm and fixed station and the stroke sum of surplus; The pressure of described hydraulic jack is: maximum pressure is 7Mpa.
8. a hydraulic drill ring grouting construction method, is characterized in that: its step is as follows:
1), grouting device is installed,
(1) flange on the sleeve pipe of grouting device (4) is connected with the flange on orifice tube (6), and between two flange, press from both sides one deck high pressure rubber seal washer (5), then be fixedly connected with bolt, for in mortar depositing construction process, prevent that the slurries between orifice tube (6) and sleeve pipe (4) from overflowing;
(2) at the inwall brushing lubrication oil of stop grouting plug (2), for the inwall of lubricated stop grouting plug;
(3) drilling rod (7) is passed from stop grouting plug (2) and pressure pipe (1), tighten drill bit (8), then pressure pipe (1) is arranged on sleeve pipe (4) by screwed connection; Reserved 5～the 10cm of grid permeable hole in pressure pipe (1) is long, guarantees that deslagging is unimpeded;
(4) orifice tube (6) inserting in injected hole is fixed with injected hole aperture;
2), in hole flushing, mud jacking, chemical cleaning project, the execution conditions of grouting device,
(1) in boring procedure, when meeting water burst, single hole water yield is greater than 10m3/h, makes stop grouting plug (2) radial clamping drilling rod by symmetrical hydraulic jack (3), by advancing pressure pipe, axial compression stop grouting plug (2), shutoff orifice tube (6) water burst;
(2) in mud jacking construction, hold drilling rod after slurries solidify tightly, drilling rod cannot exit injected hole, axially unclamps rapidly pressure pipe (1), radially unclamps the stop grouting plug (2) that clamps drilling rod by symmetrical hydraulic jack (3), and drilling rod is exited; Drilling rod exits employing and can hole forward, and also can rotate time, cutting shelves are lived an anti-teeth drill bit for obstruction backward, has avoided stifled brill and the bit freezing of slurries, makes the drilling rod can be free to advance or retreat under any state of boring slip casting, prevents that slurries from embracing brill;
(3) after slip casting finishes, unclamp slip casting tube head, then axially unclamp pressure pipe 5～10cm, radially unclamp the stop grouting plug (2) that clamps drilling rod (7), open flushing cinder system, for next section of injected hole creeps into Job readiness;
3), the construction working method of grouting device hydraulic system,
A. preparation, the hydraulic pressure oil of main system enters into hand-operated direction valve (13) through system oil inlet pipe P, flow control valve (9): hand-operated direction valve (13) one tunnels and reducing valve (10) UNICOM, another road of reducing valve (10) and system low discharge oil return pipe D UNICOM; Another road of hand-operated direction valve (13) and hydraulic lock (12) UNICOM, hand-operated direction valve (13) oil return line and system oil return pipe T UNICOM;
B. stop grouting plug (2) compresses drilling rod (7), in the time needing hydraulic cylinder piston rod to stretch out, hand-operated direction valve (13) pushes away forward, and hydraulic oil enters reducing valve (10), and post-decompression hydraulic oil enters hydraulic lock (12), then enter in the large chamber of hydraulic jack (3), under the effect of hydraulic pressure, the piston rod of hydraulic jack (3) is stretched, and makes stop grouting plug (2) deformable seal compress drilling rod (7), seal up the slurries of injection, forbid that slurry stream goes out outside orifice tube;
C. use pressure pipe (1) by the rotation of handle, axial compression stop grouting plug (2) simultaneously;
D. stop grouting plug unclamps drilling rod, in the time needing the piston rod of hydraulic jack (3) to retract, hand-operated direction valve (5) is toward pulling back, hydraulic circuit commutation, hydraulic oil enters hydraulic lock (12), then enters in hydraulic jack (3) loculus, and the piston rod of hydraulic jack (3) is return, stop grouting plug (2) unclamps drilling rod (7), allows drilling rod, drill bit, adapter sleeve axially move;
E. when slurries solidify, when the pressure pipe (1) of grouting device cannot retreat, can on pressure pipe (1) handle, put steel pipe and increase rotation torque, pressure pipe (1) rotation is retreated.
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