CN1718941A - Construction method of high pressure jet expansion head anchor rod and its device - Google Patents
Construction method of high pressure jet expansion head anchor rod and its device Download PDFInfo
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- CN1718941A CN1718941A CN 200510021318 CN200510021318A CN1718941A CN 1718941 A CN1718941 A CN 1718941A CN 200510021318 CN200510021318 CN 200510021318 CN 200510021318 A CN200510021318 A CN 200510021318A CN 1718941 A CN1718941 A CN 1718941A
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Abstract
The present invention relates to a construction method of anchor rod by using high-pressure to jet expanded head. It is characterized by that after the anchor rod is hole-formed, it utilizes drill machine to control and operate high-pressure pipe to jet and ream the expanded head position of anchor hole, then places anchor downward and injects the slurry.
Description
[technical field]
The present invention relates to the job practices of enlarged footing anchor pole, specifically relate to a kind of method and apparatus that utilizes the high-pressure liquid jet reaming to carry out the enlarged footing anchor bolt construction.
[background technology]
Anchor pole is used for pattern foundation pit supporting structure, slope retaining, landslide control and building anti-floating engineering in a large number.Existing anchor rod construction process generally is earlier with rig (roof-bolter that comprises various special uses) pore-forming, again anchor rod body is put into the hole, is in the milk in the hole then, and slurries solidify afterwards that anchor pole can bear pulling force.The anchor hole that is drilled to rig generally all is columniform, and diameter is less, and anti-pulling of anchor bar is less, is out of shape bigger.The enlarged footing anchor pole improves the best approach that uplift resistance reduces displacement beyond doubt.But the realization of enlarged footing but is a difficult point.
In order to realize reaming, people have proposed various ways, for example carry out at the bottom of the hole explosion or drilling machine is improved etc.These technology are seen feasible theoretically, can carry out reaming, but find by engineering practice, or operating difficulties, or the facility complexity can't realize.In the patent No. is in the Chinese invention patent of ZL01103578.1, and the present inventor has proposed a kind of method and apparatus that carries out reaming by the high-pressure injection mode, and is off the beaten track, the construction of carrying out the anchor pole enlarged footing that can be simple, economic.But in practice of construction, find,, cause the increase of construction equipment owing to need to use extra Counterboring apparatus, and the supporting of Counterboring apparatus and operation difficulty relatively, if this otherwise designed is installed, can bring the growth of cost again and make complicated operation.In addition, condition is relatively poor when the stratum, for example be weak soil, flour sand or sandy soil, or formation variation is bigger, during structural instability, causes the collapsing the hole of anchor hole easily and cause constructional difficulties in the process of carrying out high-pressure jetting reaming.
[summary of the invention]
The objective of the invention is to propose a kind ofly can effectively utilize rig, solve Counterboring apparatus supporting and operational issue and the job practices and the device of the effective high-pressure injection enlarged footing anchor pole that combines of other processes in reaming and the anchor bolt construction.
A kind of technical scheme that realizes above-mentioned purpose is: a kind of job practices of high-pressure injection enlarged footing anchor pole comprises following processing step:
1) adopt rig to hole to projected depth formation anchor hole;
2) shower nozzle that will be installed in the high-voltage tube front end with rig control high-voltage tube is put into the position that anchor hole waits to be provided with enlarged footing, and shower nozzle is communicated with the high-pressure pump that is connected the high-voltage tube rear end by the hollow channel of high-voltage tube;
3) high-pressure pump with the atomizing of liquids supercharging after hollow channel by high-voltage tube be transported to shower nozzle and come out through the nozzle ejection that is arranged on the shower nozzle, the soil body that impacts the anchor hole hole wall enlarges anchor hole, employed atomizing of liquids is a cement paste when injection is finished at least;
4) anchor rod body is put into anchor hole.
Another kind of technical scheme of the present invention is: a kind of job practices of high-pressure injection enlarged footing anchor pole comprises following processing step:
1) adopt rig to hole to projected depth formation anchor hole;
2) shower nozzle that will be installed in the high-voltage tube front end with rig control high-voltage tube is put into the position that anchor hole waits to be provided with enlarged footing, and shower nozzle is communicated with the high-pressure pump that is connected the high-voltage tube rear end by the hollow channel of high-voltage tube;
3) high-pressure pump with the atomizing of liquids supercharging after hollow channel by high-voltage tube be transported to shower nozzle and come out through the nozzle ejection that is arranged on the shower nozzle, the soil body that impacts the anchor hole hole wall enlarges anchor hole;
4) anchor rod body is put into anchor hole;
5) slip casting in anchor hole.
Preferably, the atomizing of liquids of the step 3) employing of back one scheme is a water.
Preferably, first water sprays reaming as atomizing of liquids in the step 3) of such scheme, sprays once more as atomizing of liquids with cement paste again.
In described step 1), adopt the drilling rod that drill bit is installed to hole; In described step 2) in adopt described drilling rod as high-voltage tube or at least as one section of high-voltage tube, described shower nozzle is provided with radial nozzles.
Perhaps preferably, in described step 1), adopt the sleeve pipe that pipe bit is installed to hole, behind the formation anchor hole, sleeve pipe is withdrawed from suitable distance to reserve the position that enlarged footing is set; In described step 2) in will be installed in the high-voltage tube front end with rig control high-voltage tube shower nozzle put into the position that anchor hole waits to be provided with enlarged footing through sleeve pipe; In described step 4), anchor rod body is put into anchor hole through sleeve pipe, extract sleeve pipe then.
Perhaps preferably, in described step 1), adopt the pipe bit of double power head rig to hole, sleeve pipe is withdrawed from suitable distance to reserve the position that enlarged footing is set to projected depth formation anchor hole; In described step 2) in adopt the center unit head control high-voltage tube of double power head rig; In described step 4), anchor rod body is put into anchor hole through sleeve pipe, extract sleeve pipe then.
Preferably, when in the step 3) of such scheme, spraying reaming, move axially shower nozzle, make enlarged footing become cylinder Yi Bian rotate shower nozzle one edge anchor hole.
The high-voltage value that described high-pressure pump produces liquid can be selected between 5 to 40Mpa according to the hardness situation on construction part stratum, is generally 12 to 40Mpa.
Be purpose of the present invention, a kind of construction equipment of high-pressure injection enlarged footing anchor pole also is provided, comprise rig, high-voltage tube, shower nozzle and high-pressure pump, described shower nozzle is installed in the high-voltage tube front end, and the hollow channel by high-voltage tube is communicated with the high-pressure pump that is connected the high-voltage tube rear end, and described rig supporting and control high-voltage tube are operated.
Preferably, also comprise sleeve pipe, described rig is the double power head rig, and its supporting is also operated with sleeve pipe and high-voltage tube that two unit heads are controlled coaxial setting respectively, and the sleeve pipe front end is equipped with the pipe bit that is used to hole.
Preferably, described high-voltage tube is that drilling rod or at least one section are drilling rod, and described shower nozzle is provided with radial nozzles.
Further preferably, only have radial nozzles on the described shower nozzle, and the number of nozzle is 1 or 2.
The present invention adopts technique scheme, and beneficial technical effects is:
1) creationary employing rig carries out the supporting and the operation of high-voltage tube, because the operation of high-voltage tube and control mode and rig are very similar to the operation and the control of drilling rod, all be in deep hole, to carry out axially-movable or rotation, mainly comprise from anchor hole and take out, put into, rotate and move etc.And rig has been a mature technique very to the supporting of drilling rod and operation, therefore only need corresponding joint portion be set to high-voltage tube, is installed to and can easily realizes on the rig, need not again additional designs to be carried out in the supporting and the operation of reaming equipment.
2) drilling rod that adopts rig has made full use of equipment as the high-voltage tube of carrying atomizing of liquids.Owing to need water flowing, drilling rod generally all has hollow channel, and what just flow into usually is not highly pressurised liquid.And shower nozzle is externally to get on, and only need have corresponding joint portion and get final product, avoids directly designing on drill bit and makes this precision position further complicated down to realizing.Make full use of the drilling rod passage, and influent is carried out supercharging, can carry out high-pressure jetting reaming, on the basis that does not increase the parts complexity, further simplified apparatus has reduced cost.
3) form of structure that adopts the metal tube of one section drilling rod and one section special configuration to be combined as high-voltage tube has very outstanding technique effect: the one, if, can utilize their original integrated structures, do not need to make any change adopting drilling rod with the rig joint portion; The 2nd, because every joint drilling rod all very short (generally being about every joint 2M), if high-voltage tube all adopts drilling rod, then shower nozzle is put into or all will be carried out a large amount of frequent drilling rod connection or dismantlement works repeatedly when taking out anchor hole, time-consuming, and each joint all can produce head loss, effect to high-pressure injection can exert an influence, have on one section drilling rod of rig joint portion and adopt an elongated metal tube to be connected, shower nozzle is installed in the front end of metal tube, can the disposable position of shower nozzle being put into the anchor hole enlarged footing, the time and labour saving, but also improved the effect of high-pressure injection.In addition, utilize the very short characteristics of every joint drilling rod, can adjust the placement degree of depth of shower nozzle eaily by the joint number of increase and decrease drilling rod.
4) at least spraying reaming when finishing, use cement paste to spray, the cement paste after the injection can condense in anchor hole becomes anchoring body, can remove the grouting process after the reaming from, saves man-hour and cost.Certainly in order to obtain better anchoring effect or to prevent spillage, also can after adopting the cement paste reaming, still carry out grouting process, even carry out repeatedly grouting process, can determine according to the concrete needs of engineering design.
5) adopt water can play good reaming effect as atomizing of liquids, under the identical situation of other conditions, water is than obtaining bigger enlarged footing with cement paste.
6) adopt to rotate and the method for mobile shower nozzle generates the comparatively cylindrical enlarged footing of rule of shape, can be before construction estimate basic design parameters such as uplift resistance comparatively accurately, help the realization of design idea in construction by theory analysis.
7) adopt the drilling rod that drill bit is installed to hole, and utilize this drilling rod, further share equipment, reach economic effect as the high-voltage tube of carrying atomizing of liquids.
8) adopt the sleeve pipe that pipe bit is installed to hole, can reach good retaining wall effect, the hole of collapsing when avoiding holing; When reaming, the sleeve pipe superiority is more obvious: at first, sleeve pipe slightly withdraws from reserves the enlarged footing construction location, and effectively retaining wall prevents the hole of collapsing that high-pressure injection may bring; Simultaneously, the setting of sleeve pipe is very beneficial for follow-up equipments such as high-pressure nozzle, anchor rod body, Grouting Pipe and enters anchor hole smoothly, since anchor hole generally all have less diameter (be generally 10～15cm) and bigger length (be generally 4～50m), and when carrying out ream operation, various device repeatedly need be taken out from anchor hole or puts into, being arranged so that difficulty originally and process that must extreme care become smoothly of sleeve pipe and light, improved operating efficiency greatly, by the inventive method operation, can guarantee to construct successfully.
9) adopt the double power head rig, can control sleeve pipe and high-voltage tube simultaneously respectively by enough two unit heads, operation more flexibly, convenient, work efficiency height, construction speed are fast.
10) only setting is perpendicular to the radial nozzles of its axis on the shower nozzle, and the injection stream that is produced is impacted cutting to the soil body and made the effect of anchor hole expansion very good perpendicular to the anchor hole wall.Weep hole on the common drill bit generally be forward or be tilted to before, be used for being convenient to creep into towards the soil body in loose the place ahead, can't form injection stream perpendicular to hole wall, can not reach the reaming effect.Can make the pressure of injection stream concentrate, avoid nozzle too much to cause pressure to disperse and can't obtain good impact cutting effect.
Below by embodiment also in conjunction with the accompanying drawings, the present invention is described in further detail.
[description of drawings]
Fig. 1 is the construction equipment schematic diagram of high-pressure injection enlarged footing anchor pole of the present invention.
[specific embodiment]
The construction equipment of embodiment one, a kind of high-pressure injection enlarged footing anchor pole, in conjunction with Fig. 1, comprise shower nozzle 1, high-voltage tube 2, rig 3 and high-pressure pump 4, described shower nozzle 1 is provided with radial nozzles 1a, shower nozzle is installed in high-voltage tube 2 front ends, and be communicated with the high-pressure pump 4 that is connected high-voltage tube 2 rear ends by the hollow channel of high-voltage tube, be communicated with by flexible pipe 4a between high-voltage tube 2 rear ends and the high-pressure pump 4; Rig 3 supportings are also controlled high-voltage tube 2 by unit head 3a and are operated.
Shower nozzle can be column, taper or the hemispherical thing of hollow, and an end has joint suitable with high-voltage tube and that be communicated with, generally speaking can adopt to be threaded.1 or 2 nozzles are arranged on the shower nozzle, and nozzle preferably is arranged in and is radial arrangement in the Normal plane of shower nozzle or radial symmetric is arranged.Nozzle is the aperture that is distributed on the shower nozzle sidewall, and its diameter is 0.5～4mm, preferred 1～2mm, its shape can be cylindrical, conical, be with bell-mouthed streamlined etc.The effect of shower nozzle is that the highly pressurised liquid that high-voltage tube transports is guided to nozzle ejection through the internal cavity of shower nozzle.
In the above-described embodiments, the rig that is adopted both can be common geological drilling rig, jumbolter, jet drill rig etc., also can be to have the rig that advances technology with one heart with pipe bit, can also be the double power head rig.Described double power head rig is meant the rig with two unit heads, can control respectively sleeve pipe mounted thereto and center drilling rod simultaneously, and high-voltage tube just by heart unit head wherein, promptly control by that unit head of control centre's drilling rod.In addition, the high-voltage tube that is adopted can be steel pipe, compo pipe, hard plastic tube of special configuration etc.; Also can just adopt the drilling rod that is complementary with rig; Can also be compound tube, promptly part adopts drilling rod, and part adopts the metal tube of special configuration, and metal tube and drilling rod are by being threaded, and their hollow channel connection becomes a high-voltage tube, and drilling rod preferentially is placed on the joint portion with rig.No matter which kind of situation as long as the connecting portion of shower nozzle is carried out corresponding setting, realizes that nozzle is just passable with being communicated with of atomizing of liquids passage.The rear end of high-voltage tube with can adopt high-pressure hose (as high-pressure rubber hose, gauze wire cloth rubber tube, steel plate rubber-lined pipe etc.) being connected of high-pressure pump.A control valve can also be installed between high-voltage tube and the high-pressure pump, realize functions such as shunting, pressure limiting, control operation.
" anchor pole " alleged among the present invention can have various forms, for example gives stress anchor pole, non-stress anchor pole, the soil nailing etc. of giving; Its body of rod can adopt various materials, for example reinforcing bar, steel strand, bamboo reinforcement etc.; Can be towards a plurality of direction settings, for example level, inclination and vertical direction etc.
The job practices of embodiment two, a kind of high-pressure injection enlarged footing anchor pole.Its basic process steps is:
Boring: adopt rig to hole to projected depth formation anchor hole.This step can adopt the drilling rod that drill bit is installed to hole, and also can adopt the sleeve pipe that pipe bit is installed to hole, and after forming anchor hole, sleeve pipe is withdrawed from suitable distance to reserve the position that enlarged footing is set.Described pipe bit can be a kind of annular bit suitable with casing diameter, also can be just before sleeve pipe in the end periphery welding some alloy blades form.The rig of control cased bore-bole can be that common rig also can be the double power head rig.
Reaming: the shower nozzle that will be installed in the high-voltage tube front end with rig control high-voltage tube is put into the position that anchor hole waits to be provided with enlarged footing, and shower nozzle is communicated with the high-pressure pump that is connected the high-voltage tube rear end by the hollow channel of high-voltage tube; High-pressure pump with the atomizing of liquids supercharging after hollow channel by high-voltage tube be transported to shower nozzle and come out through the nozzle ejection that is arranged on the shower nozzle, the soil body that impacts the anchor hole hole wall enlarges anchor hole.Employed high-voltage tube can be the parts of preparing separately, also can just adopt the drilling rod that is complementary with rig.For example, adopting the drilling rod that drill bit is installed to carry out when boring, just this drilling rod is taken out from anchor hole when reaming, is the bit change-over that is installed in the drilling rod front end shower nozzle with nozzle, carries out subsequent operation then.If the time used sleeve pipe in boring, then when reaming, need to be installed in high-voltage tube or put into anchor hole through sleeve pipe as the shower nozzle of the drilling rod front end of high-voltage tube, operation is placed in anchor hole more directly that shower nozzle is wanted easily and is much smooth like this.In addition, what deserves to be mentioned is, mode of operation more flexibly to be arranged if when boring, use the double power head rig.Because this kind rig has two unit heads, can control the center drilling rod of sleeve pipe and coaxial setting simultaneously respectively, therefore: can when boring, adopt sleeve pipe and center drilling rod to creep into synchronously, withdraw from the centre drill bar behind the pore-forming, be replaced by the high-voltage tube that shower nozzle is housed and carry out subsequent operation; The high-voltage tube that shower nozzle also can just will be housed before boring is installed in the position of center drilling rod, and only adopts sleeve pipe to creep into, and high-voltage tube and sleeve pipe enter in the anchor hole synchronously, adjust the position of shower nozzle and sleeve pipe behind the pore-forming respectively and carry out subsequent operation.In above-mentioned two kinds of methods of operating, all can adopt the center drilling rod as high-voltage tube.
When in anchor hole, placing shower nozzle, carry out with rig operate high pressure pipe; When reaming, can fix a point to spray, move around etc., move axially shower nozzle on one side also can rotate shower nozzle one edge anchor hole, make enlarged footing become cylinder, this enlarged footing shape helps carrying out estimating and calculating of construction parameter; Because rig is the ten minutes mature technique to the control of drilling rod, so these operations are easy to carry out.
Spraying the used liquid of reaming can be water, cement paste and various chemical grouts etc., can select according to the requirement of concrete stratum and construction.And, also being not limited to use certain single liquid, can mix or liquid that alternate selection is different carries out repeatedly reaming.For example, adopt water to expand once or secondary, adopt cement paste to carry out secondary or three reamings again, up to reaching design standard.The high-voltage value that high-pressure pump produces liquid can be selected between 5 to 40Mpa according to the hardness situation and the enlarged footing intended diameter on construction part stratum, is generally 12 to 40Mpa.
Slip casting: anchor rod body is put into anchor hole slip casting then, and this step can be carried out according to conventional grouting process.If when boring, used sleeve pipe, then need anchor rod body is put into anchor hole from sleeve pipe, extract sleeve pipe then, carry out slip casting again.If when reaming, be to utilize drilling rod as high-voltage tube, because drilling rod generally all compares slightly, therefore, should before putting into anchor pole, take out drilling rod earlier; If use special high-voltage tube to carry out reaming, then can be chosen in and take out high-voltage tube before or after putting into anchor pole, even high-voltage tube can also be retained in the anchor hole.If select cement paste to carry out reaming in previous step is rapid, this slip casting step can be carried out, or only need carry out suitable additional getting final product.
Below by concrete construction example in detail the present invention being described in detail realizes.
Construction example one, basement anti-float anchor rod, permanent anchor pole, rod body material are 3 φ, 32 reinforcing bars.
Design parameters: design uplift resistance 300KN, hole depth 8M, aperture 0.15M, enlarged footing are positioned at the bottom of the hole, length 3M, diameter 0.8M
Enlarged footing position stratigraphic description: soil layer is a granite residual soil, and soil property is for moulding shape firmly.
Work progress:
Boring: adopt the general geology rig to handle drilling rod and hole to projected depth.
Reaming: boring drilling rod is taken out, and is the bit change-over that is installed in front end shower nozzle, connects high-pressure pump then at the drilling rod rear portion, makes high-pressure pump pass through its hollow channel and is communicated with shower nozzle, and shower nozzle is provided with a radial nozzles.The operation rig is put into shower nozzle at the bottom of the hole, adopts water as atomizing of liquids, and expulsion pressure is 30Mpa.Rotate axially mobile shower nozzle in the design length scope of enlarged footing of shower nozzle one edge anchor hole on one side, translational speed is 0.2M/min, drop to again at the bottom of the hole after promoting 3M at the bottom of the hole, using cement paste then instead sprays, at the bottom of the hole, promote 3M, the enlarged footing diameter adheres to specification substantially, and the excessive slurry in aperture.
Take out drilling rod, anchor pole is put into anchor hole, need not slip casting.
Construction example two, pattern foundation pit supporting structure give the stress anchor cable, and the body of rod is 6 φ
i15 steel strand.
Design parameters: design uplift resistance 850KN, ultimate pullout capacity 1530KN, hole depth 20M, aperture 0.13M, enlarged footing are positioned at the bottom of the hole, length 5M, diameter 1.2M
Stratigraphic description: from top to bottom the stratum be respectively mucky soil, loose-close slightly powder fine sand, close slightly-in close medium coarse sand, the anchor pole enlarged footing is positioned at medium-sand seam
Work progress:
Boring: the cased bore-bole (promptly advancing with pipe bit) that adopts the manipulation of common bolt rig that pipe bit is installed to projected depth, withdraws from sleeve pipe from 5M, reserves the position that enlarged footing is set.
Reaming: cut-off directly be the steel pipe of 32mm as high-voltage tube, the one end is equipped with shower nozzle, the other end has the connecting portion that is complementary with rig, and is communicated with high-pressure pump.Described shower nozzle is provided with two radial nozzles of symmetrical distribution.High-voltage tube is installed on the rig, and the operation rig adopts water as atomizing of liquids at the bottom of sleeve pipe is put into the hole with shower nozzle, and expulsion pressure is 25Mpa.Rotate axially mobile shower nozzle in the design length scope of enlarged footing of shower nozzle one edge anchor hole on one side by rig control operation high-voltage tube, translational speed is 0.2M/min, move back and forth twice after, the enlarged footing diameter adheres to specification substantially.
Slip casting: anchor pole is put into anchor hole through sleeve pipe, takes out high-voltage tube then, extract sleeve pipe, in the hole cement injection till slurry is overflow in the aperture, and certain interval of time slip casting is once again.
Construction example three,
Design parameters: hole depth 18M, aperture 0.15M, enlarged footing are positioned at the bottom of the hole, length 3M, diameter 1.5M
Enlarged footing position stratigraphic description: loose sand
Work progress:
Boring: cut-off directly be the steel pipe of 32mm as high-voltage tube, it is installed on the center unit head of double power head rig, high-voltage tube is coaxial with the sleeve pipe that is installed on another unit head.The high-voltage tube front end is installed shower nozzle, and the rear portion is communicated with high-pressure pump, and described shower nozzle is provided with a radial nozzles.The cased bore-bole that described double power head rig manipulation is equipped with pipe bit withdraws from sleeve pipe from 3M to projected depth, reserves the position that enlarged footing is set.
Reaming: the center unit head of operation double power head rig is adjusted the position of high-voltage tube, shower nozzle is put into the hole at the bottom of, adopt water as atomizing of liquids earlier, expulsion pressure is 15Mpa.Rotate axially mobile shower nozzle in the design length scope of enlarged footing of shower nozzle one edge anchor hole on one side, translational speed is 0.2M/min, after moving back and forth 2 times, it is 1 cement paste that atomizing of liquids is replaced by water/binder ratio, slowly promote the reaming of 3m rotary-jet once at the bottom of the hole, the enlarged footing diameter adheres to specification substantially.
Slip casting: take out high-voltage tube, anchor pole is put into anchor hole through sleeve pipe, extract sleeve pipe then, slip casting once.
Construction example four,
Design parameters: hole depth 25M, aperture 0.15M, enlarged footing are positioned at the bottom of the hole, length 3M, diameter 0.8M
Stratigraphic description: top is gravelly soil, and the bottom is sloping residual soil, and enlarged footing is positioned at sloping residual soil.
Work progress:
Boring: the center drilling rod that adopts the double power head rig to handle the sleeve pipe of pipe bit is installed and be equipped with drill bit is holed synchronously to projected depth, and sleeve pipe is withdrawed from 3M, reserves the position that enlarged footing is set.
Reaming: withdrawing from the center drilling rod, is the bit change-over that is installed in front end shower nozzle, connects high-pressure pump then at the drilling rod rear portion, makes high-pressure pump pass through its hollow channel and is communicated with shower nozzle, and shower nozzle is provided with a radial nozzles.The center unit head of operation double power head rig will be installed in the shower nozzle of center drilling rod front end and put at the bottom of the hole, adopt water/binder ratio be 1 cement paste as atomizing of liquids, expulsion pressure is 28Mpa.On one side rotate axially mobile shower nozzle in the design length scope of enlarged footing of shower nozzle one edge anchor hole, translational speed is 0.15M/min, move back and forth 2 times after, the enlarged footing diameter adheres to specification substantially.
Taking-up center drilling rod is put into anchor hole with anchor pole through sleeve pipe, extracts sleeve pipe then, need not slip casting.
Claims (13)
1, a kind of job practices of high-pressure injection enlarged footing anchor pole comprises following processing step:
1) adopt rig to hole to projected depth formation anchor hole;
2) shower nozzle that will be installed in the high-voltage tube front end with rig control high-voltage tube is put into the position that anchor hole waits to be provided with enlarged footing, and shower nozzle is communicated with the high-pressure pump that is connected the high-voltage tube rear end by the hollow channel of high-voltage tube;
3) high-pressure pump with the atomizing of liquids supercharging after hollow channel by high-voltage tube be transported to shower nozzle and come out through the nozzle ejection that is arranged on the shower nozzle, the soil body that impacts the anchor hole hole wall enlarges anchor hole, employed atomizing of liquids is a cement paste when injection is finished at least;
4) anchor rod body is put into anchor hole.
2, the job practices of high-pressure injection enlarged footing anchor pole according to claim 1, it is characterized in that: first water sprays reaming as atomizing of liquids in described step 3), sprays once more as atomizing of liquids with cement paste again.
3, a kind of job practices of high-pressure injection enlarged footing anchor pole comprises following processing step:
1) adopt rig to hole to projected depth formation anchor hole;
2) shower nozzle that will be installed in the high-voltage tube front end with rig control high-voltage tube is put into the position that anchor hole waits to be provided with enlarged footing, and shower nozzle is communicated with the high-pressure pump that is connected the high-voltage tube rear end by the hollow channel of high-voltage tube;
3) high-pressure pump with the atomizing of liquids supercharging after hollow channel by high-voltage tube be transported to shower nozzle and come out through the nozzle ejection that is arranged on the shower nozzle, the soil body that impacts the anchor hole hole wall enlarges anchor hole;
4) anchor rod body is put into anchor hole.
5) slip casting in anchor hole.
4, the job practices of high-pressure injection enlarged footing anchor pole according to claim 3 is characterized in that: the atomizing of liquids that described step 3) adopts is a water.
5, the job practices of high-pressure injection enlarged footing anchor pole according to claim 3, it is characterized in that: first water sprays reaming as atomizing of liquids in described step 3), sprays once more as atomizing of liquids with cement paste again.
6, according to the job practices of any described high-pressure injection enlarged footing anchor pole of claim 1～5, it is characterized in that: in described step 1), adopt the drilling rod that drill bit is installed to hole; In described step 2) in adopt described drilling rod as high-voltage tube or at least as one section of high-voltage tube, described shower nozzle is provided with radial nozzles.
7, according to the job practices of any described high-pressure injection enlarged footing anchor pole of claim 1～5, it is characterized in that: in described step 1), adopt the sleeve pipe that pipe bit is installed to hole, after forming anchor hole, sleeve pipe is withdrawed from suitable distance to reserve the position that enlarged footing is set; In described step 2) in will be installed in the high-voltage tube front end with rig control high-voltage tube shower nozzle put into the position that anchor hole waits to be provided with enlarged footing through sleeve pipe; In described step 4), anchor rod body is put into anchor hole through sleeve pipe, extract sleeve pipe then.
8, according to the job practices of any described high-pressure injection enlarged footing anchor pole of claim 1～5, it is characterized in that: in described step 1), adopt the pipe bit of double power head rig to hole, sleeve pipe is withdrawed from suitable distance to reserve the position that enlarged footing is set to projected depth formation anchor hole; In described step 2) in adopt the center unit head control high-voltage tube of double power head rig; In described step 4), anchor rod body is put into anchor hole through sleeve pipe, extract sleeve pipe then.
9, according to the job practices of any described high-pressure injection enlarged footing anchor pole of claim 1～8, it is characterized in that: when in described step 3), spraying reaming, move axially shower nozzle, make enlarged footing become cylinder Yi Bian rotate shower nozzle one edge anchor hole.
10, according to the job practices of any described high-pressure injection enlarged footing anchor pole of claim 1～8, it is characterized in that: the high-voltage value that described high-pressure pump produces liquid is 12 to 40Mpa.
11, a kind of construction equipment of high-pressure injection enlarged footing anchor pole, comprise rig, it is characterized in that: also comprise high-voltage tube, shower nozzle and high-pressure pump, described shower nozzle is installed in the high-voltage tube front end, and the hollow channel by high-voltage tube is communicated with the high-pressure pump that is connected the high-voltage tube rear end, and described rig supporting and control high-voltage tube are operated.
12, the construction equipment of high-pressure injection enlarged footing anchor pole according to claim 11, it is characterized in that: also comprise sleeve pipe, described rig is the rig of double power head, its supporting is also operated with sleeve pipe and high-voltage tube that two unit heads are controlled coaxial setting respectively, and the sleeve pipe front end is equipped with the pipe bit that is used to hole.
13, according to the construction equipment of claim 11 or 12 described high-pressure injection enlarged footing anchor poles, it is characterized in that: described high-voltage tube is that drilling rod or at least one section are drilling rod, and described shower nozzle is provided with radial nozzles.
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| CNB2005100213189A CN100371533C (en) | 2005-07-19 | 2005-07-19 | Construction method of high pressure jet expansion head anchor rod and its device |
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| CNB2005100213189A CN100371533C (en) | 2005-07-19 | 2005-07-19 | Construction method of high pressure jet expansion head anchor rod and its device |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101858084A (en) * | 2010-07-05 | 2010-10-13 | 天津建岩岩土工程有限公司 | Cement injection machine used for reinforcing and preventing leakage in underground tunnel construction |
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| CN101858084A (en) * | 2010-07-05 | 2010-10-13 | 天津建岩岩土工程有限公司 | Cement injection machine used for reinforcing and preventing leakage in underground tunnel construction |
| CN102213077A (en) * | 2011-05-25 | 2011-10-12 | 煤炭科学研究总院沈阳研究院 | Coal seam reaming system using three-dimensional (3D) swirling water jet and reaming and fracturing method for permeability enhancement |
| CN103343537A (en) * | 2013-07-29 | 2013-10-09 | 李宪奎 | Drilling machine of high-pressure rotary-spraying anchor rod and construction method of high-pressure rotary-spraying anchor rod |
| CN103526754A (en) * | 2013-09-30 | 2014-01-22 | 中国建筑第八工程局有限公司 | Method for constructing head-expanded anchoring rod in sand-rich decomposed rock |
| CN104032737A (en) * | 2014-05-21 | 2014-09-10 | 苏州市能工基础工程有限责任公司 | Construction method and structure of pressure dispersing type expansion head anchor rod |
| CN104032737B (en) * | 2014-05-21 | 2016-05-04 | 苏州市能工基础工程有限责任公司 | Construction method and the structure of pressure dispersing type enlarged footing anchor pole |
| CN104088278B (en) * | 2014-07-22 | 2016-04-20 | 黄辉 | A kind of construction method of powerful water column hole reaming of anchor rod and device |
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| CN106677186A (en) * | 2017-02-17 | 2017-05-17 | 北京中岩大地科技股份有限公司 | Free-angle rotary jet grouting technology |
| CN109339070A (en) * | 2018-11-05 | 2019-02-15 | 黄灿 | Anchoring pile and its construction method are planted in a kind of whirl spraying |
| CN110904959A (en) * | 2019-12-04 | 2020-03-24 | 广州市地平线岩土工程有限公司 | Anti-collapse hole construction method for anchor cable with enlarged head |
| CN113669090A (en) * | 2021-08-23 | 2021-11-19 | 中建八局发展建设有限公司 | Anchor rod construction process |
| CN113669090B (en) * | 2021-08-23 | 2023-05-02 | 中建八局发展建设有限公司 | Anchor rod construction process |
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Application publication date: 20060111 Assignee: Shenzhen great joint bolt Technology Co., Ltd. Assignor: Zeng Qingyi Contract record no.: 2010440000214 Denomination of invention: Construction method of high pressure jet expansion head anchor rod and its device Granted publication date: 20080227 License type: Common License Record date: 20100308 |
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