阅读说明：本技术 一种钻头止浆钻杆分段后退式注浆方法 (A kind of drill bit only starches drilling rod and is segmented retrusive grouting method ) 是由 王玥 史继尧 徐启鹏 李广跃 罗占夫 徐海廷 邹翀 付仲润 宋妍 晁宁 于 2019-09-26 设计创作，主要内容包括：本发明公开了一种钻头止浆钻杆分段后退式注浆方法,如下：启动钻机,在设计位置钻孔；钻孔至该根双重管钻杆的深度后,拆除高压水和风供给系统,另取一根所述双重管钻杆和液压囊输液管与孔内的所述双重管钻杆和液压囊输液管连接,继续钻孔,至该根双重管钻杆的深度；不断延长双重管钻杆和和液压囊输液管,直至钻孔至设计深度；依次通过各所述液压囊输液管向止浆液压囊中注入液体,使其沿钻孔径向膨胀,止浆液压囊与钻孔的侧壁紧密贴合,在其前方钻孔内形成密封区。依次通过各根所述双重管钻杆和钻头朝向密封区注浆。采用该注浆方法可以避免浆液凝固抱死钻杆和钻头,实现便捷快速的钻杆后退式注浆工艺,对钻机设备要求低,损耗小。(Drilling rod is only starched the invention discloses a kind of drill bit and is segmented retrusive grouting method, and as follows: starting drilling machine drills in design position；After drilling to the depth of the root dual pipe drilling rod, remove high pressure water and wind feed system, separately take the dual pipe drilling rod and hydraulic bag perfusion tube in hole the dual pipe drilling rod and hydraulic bag perfusion tube connect, continue to drill, until the depth of the root dual pipe drilling rod；Constantly extend dual pipe drilling rod and with hydraulic bag perfusion tube, until drilling is to projected depth；Pass sequentially through each hydraulic bag perfusion tube and inject liquid into only slurry hydraulic bag, be radially expanded it along drilling, the side wall for only starching hydraulic bag and drilling fits closely, drill in front of it in form seal area.Each dual pipe drilling rod and drill bit are passed sequentially through towards seal area slip casting.Fast and convenient drilling rod retrusive grouting process can be realized to avoid grout cures locking drilling rod and drill bit using the grouting method, it is low to drilling equipment requirement, it is lost small.)

1. a kind of drill bit only starches drilling rod and is segmented retrusive grouting method, which is characterized in that only starch drilling rod using a kind of drill bit and be segmented Retrusive grouting device, the grouting device include:

Multiple dual pipe drilling rods (11), each dual pipe drilling rod (11) is sequentially axial to be pierced in injected hole, detachable between each Connection；Before being in definition drilling, after being outside；Dual pipe drilling rod (11) front end of front end is connected with single pass drill bit (10)；

Multiple hydraulic bag perfusion tubes (2), it is consistent with number, the length of the dual pipe drilling rod (11), and side by side, front end liquid Pressure capsule perfusion tube (2) is communicated with one, and only slurry hydraulic bag (1), only slurry hydraulic bag (1) are a hollow resilient bladder body, packet It is overlying on the leading portion outer wall of the dual pipe drilling rod (11) of front end；

The grouting method is as follows:

Step 1: high pressure water and wind feed system and first dual pipe drilling rod (11) piping connection are started drilling machine, In Design position drilling；

Step 2: removing high pressure water and wind feed system after drilling to the depth of the root dual pipe drilling rod (11), separately taking an institute State the dual pipe drilling rod (11) in dual pipe drilling rod (11) and hydraulic bag perfusion tube (2) and hole and hydraulic bag perfusion tube (2) Connection, continues to drill, until the depth of the root dual pipe drilling rod (11)；Continue to connect the other one dual pipe drilling rod (11) and Hydraulic bag perfusion tube (2), is repeated in aforesaid operations, constantly extend dual pipe drilling rod (11) and with hydraulic bag perfusion tube (2), directly To drilling to projected depth；

Step 3: hydraulic bag perfusion tube (2) is connected with electric hydraulic pump (5), each hydraulic bag perfusion tube is passed sequentially through (2) liquid is injected into only slurry hydraulic bag (1), is radially expanded it along drilling, the side wall of only slurry hydraulic bag (1) and drilling It fits closely, drill interior formation seal area in front of it；

Step 4: removing high pressure water and wind feed system, the dual pipe drilling rod (11) of grouting system and rearmost end is connected, successively By each dual pipe drilling rod (11) and drill bit (10) towards seal area slip casting, the slip casting of this section is completed；After grout cures, The liquid in hydraulic bag 1 is only starched in discharge, its is made to restore contraction state；

Step 5: retreating the length of a dual pipe drilling rod (11), a dual pipe drilling rod of rearmost end is dismantled (11) and hydraulic bag perfusion tube (2)；

Step 6: step 4~five are repeated, segmenting slip casting, until completing the design slip casting requirement in drilling.

2. a kind of drill bit according to claim 1 only starches drilling rod and is segmented retrusive grouting method, which is characterized in that each described Dual pipe drilling rod (11) is concentric two-layer pipe, and inner tube is hollow structure, and annular is formed between outer tube and inner tube Channel.

3. a kind of drill bit according to claim 21 only starches drilling rod and is segmented retrusive grouting method, which is characterized in that each institute Hydraulic bag perfusion tube (2) front and back is stated sequentially to be detachably connected and be connected；It is closely pasted with the corresponding dual pipe drilling rod (11) It closes；The hydraulic bag perfusion tube (2) of rearmost end is used for and electric hydraulic pump (5) piping connection.

4. a kind of drill bit according to claim 3 only starches drilling rod and is segmented retrusive grouting method, which is characterized in that described to stop When being filled with liquid in slurry hydraulic bag (1), it is radially expanded along drilling, fits closely, formed in the front of drilling close with borehole sidewall Seal area；When liquid is discharged, it is contracted to original state.

5. a kind of drill bit according to claim 1 only starches drilling rod and is segmented retrusive grouting method, which is characterized in that described In step 3, the pressure in only slurry hydraulic bag (1) after expansion is not less than 1.5 times of design grouting pressure.

6. a kind of drill bit according to claim 4 or 5 only starches drilling rod and is segmented retrusive grouting method, which is characterized in that when Should only slurry hydraulic bag (1) when be in contraction state, length is not less than 2m, width less than the drill bit (10) the widest part extremely Few 2cm.

7. a kind of drill bit according to claim 6 only starches drilling rod and is segmented retrusive grouting method, which is characterized in that in each institute It states and is provided in the axial direction with a semi-circular recesses on the outer wall of dual pipe drilling rod (11), for hydraulic bag perfusion tube (2) described in clamping； The internal diameter of each groove is consistent with the diameter of the hydraulic bag perfusion tube (2).

8. a kind of drill bit according to claim 7 only starches drilling rod and is segmented retrusive grouting method, which is characterized in that each adjacent The dual pipe drilling rod (11), be connected by quick coupling between adjacent hydraulic bag perfusion tube (2).

9. a kind of drill bit according to claim 8 only starches drilling rod and is segmented retrusive grouting method, which is characterized in that each adjacent The dual pipe drilling rod (11), be arranged with a rubber sleeve (3) at the quick coupling between adjacent hydraulic bag perfusion tube (2).

10. a kind of drill bit according to claim 9 only starches drilling rod and is segmented retrusive grouting method, which is characterized in that in hole A single tube is integrally communicated between the dual pipe drilling rod (11) of one of bottom and drill bit (10).

[technical field]

Drilling rod, which is only starched, the invention belongs to civil engineering technical field of tunnel construction more particularly to a kind of drill bit is segmented retrusive Grouting method.

[background technique]

In tunnel and underground engineering construction, often meet with weak water rich strata, be easy to appear excavation face water bursting factor and Large deformation jeopardizes safety for tunnel engineering.The improvement of rock property is carried out frequently with slip casting method at present, that is, passes through certain pressure for glue Solidifying property material injection country rock simultaneously consolidates, and filling pore solid soil plays good reinforcing and water plugging effect.

Currently, main horizontal grouting method is divided to two kinds: i.e. segmentation protrusive slip casting and drilling rod is segmented retrusive slip casting.It bores The applicable formation condition of bar retrusive slip casting is relatively slightly good, can accomplish once to drill substantially i.e. to design drilling depth, then exist Orifice sealing utilizes the self-sealing of rapid hardening slurries, sealing device is removed after slip casting, drilling rod retreats and removes extra drilling rod, again Slip casting is sealed, until drilling rod all exits, the multiple segmenting slip casting of complete opening is completed.The method slip casting is high-efficient, the mortar depositing construction duration It is short, but since slurries are full of hole between drilling rod and drilling, drilling rod is tightly embraced after consolidation and blocks drill bit (bit diameter > brill Shank diameter), Yao Shixian drilling rod retreats, and needs high-power and large torque drill power head, and rotation is beaten repeatedly, and shatter slurries are solidifying Drawing after solid and go out, the high requirements on the equipment, abrasion are big, and it is relatively high that the core parts such as splined shaft in power head maintain renewal cost It is expensive, there is the risk for retreating failure of getting rid of poverty during deep hole grouting is to be greater than 20m.

[summary of the invention]

Drilling rod, which is only starched, the object of the present invention is to provide a kind of drill bit is segmented retrusive grouting method, it can using the grouting method To avoid grout cures locking drilling rod and drill bit, fast and convenient drilling rod retrusive grouting process is realized, to drilling equipment requirement It is low, it is lost small.

The invention adopts the following technical scheme: a kind of drill bit, which only starches drilling rod, is segmented retrusive grouting method, a kind of brill is used Only slurry drilling rod is segmented retrusive grouting device to head, and grouting device includes:

Multiple dual pipe drilling rods, each dual pipe drilling rod sequentially axially pierce in injected hole, removable between each dual pipe drilling rod Unload connection；Before being in definition drilling, after being outside；The dual pipe drilling rod front end of front end is connected with single pass drill bit；

Multiple hydraulic bag perfusion tubes, it is consistent with the number of dual pipe drilling rod, length, and side by side, front end hydraulic bag is defeated Liquid pipe is communicated with one and only starches hydraulic bag, only starches hydraulic bag, is a hollow resilient bladder body, and the dual pipe for being coated on front end bores The leading portion outer wall of bar；

The grouting method is as follows:

Step 1: starting drilling machine, designing high pressure water and wind feed system and first dual pipe drilling rod piping connection Position drilling；

Step 2: removing high pressure water and wind feed system after drilling to the depth of the root dual pipe drilling rod, one pair is separately taken Again pipe drilling rod and hydraulic bag perfusion tube in hole dual pipe drilling rod and hydraulic bag perfusion tube connect, continue to drill, until the root is double The depth of pipe drilling rod again；Continue to connect an other dual pipe drilling rod and hydraulic bag perfusion tube, is repeated in aforesaid operations, constantly Extend dual pipe drilling rod and with hydraulic bag perfusion tube, until drilling is to projected depth；

Step 3: hydraulic bag perfusion tube is connected with electric hydraulic pump, each hydraulic bag perfusion tube is passed sequentially through to only slurry Liquid is injected in hydraulic bag, is radially expanded it along drilling, only starches hydraulic bag and the side wall of drilling fits closely, bore in front of it Seal area is formed in hole；

Step 4: removing high pressure water and wind feed system, the dual pipe drilling rod of grouting system and rearmost end is connected, successively By each dual pipe drilling rod and drill bit towards seal area slip casting, the slip casting of this section is completed；After grout cures, discharge stops slurries pressure Liquid in capsule 1 makes it restore contraction state；

Step 5: retreating the length of a dual pipe drilling rod, a dual pipe drilling rod and the hydraulic bag for dismantling rearmost end are defeated Liquid pipe；

Step 6: step 4~five are repeated, segmenting slip casting, until completing the design slip casting requirement in drilling.

Further, each dual pipe drilling rod is concentric two-layer pipe, and inner tube is hollow structure, outer tube and interior Circular passage is formed between layer pipe.

Further, it is sequentially detachably connected and is connected before and after each hydraulic bag perfusion tube；With corresponding dual pipe drilling rod It fits closely；The hydraulic bag perfusion tube of rearmost end is used for and electric hydraulic pump piping connection.

Further, should only slurries pressure is intracapsular is radially expanded along drilling, fits closely with borehole sidewall when being filled with liquid, Seal area is formed in the front of drilling；When liquid is discharged, it is contracted to original state.

Further, in step 3, the only slurries after expansion press intracapsular pressure not less than design grouting pressure 1.5 times.

Further, when this, which only starches hydraulic bag, is in contraction state, length is not less than 2m, and width is less than the brill The widest part at least 2cm of head.

Further, a semi-circular recesses are provided in the axial direction on the outer wall of each dual pipe drilling rod, for described in clamping Hydraulic bag perfusion tube；The internal diameter of each groove is consistent with the diameter of the hydraulic bag perfusion tube.

Further, it is connected by quick coupling between each adjacent dual pipe drilling rod, adjacent hydraulic bag perfusion tube.

Further, it is arranged at the quick coupling between each adjacent dual pipe drilling rod, adjacent hydraulic bag perfusion tube One rubber sleeve.

Further, a single tube is integrally communicated between a dual pipe drilling rod and drill bit for bottom hole.

The beneficial effects of the present invention are:

1. avoiding locking drilling rod and drill bit after grout cures, it is more suitable for the deep hole grouting greater than 20m, is omitted and " bores Bar is got rid of poverty retrogressing " this procedure, improve mortar depositing construction efficiency.

2. reducing the performance requirement to drilling equipment, such as torque, hydraulic hammer, pulling capacity, reduce equipment attrition and work Industry maintenance cost.

[Detailed description of the invention]

Fig. 1 is the structural schematic diagram of the embodiment of the present invention.

Fig. 2 is the structural schematic diagram in work progress of the embodiment of the present invention.

Fig. 3 is the enlarged section of dual pipe drilling rod.

Wherein: 1, stop and starches hydraulic bag, 2, hydraulic bag perfusion tube, 3, rubber sleeve, 4, quick coupling, 5, electric hydraulic pump, 6, Pressure gauge, 10, drill bit, 11, dual pipe drilling rod.

[specific embodiment]

The following describes the present invention in detail with reference to the accompanying drawings and specific embodiments.

Drilling rod is only starched the embodiment of the invention discloses a kind of drill bit and is segmented retrusive grouting method, is only starched using a kind of drill bit Drilling rod is segmented retrusive grouting device, and as shown in Fig. 1,2 or 3, grouting device includes:

Multiple dual pipe drilling rods 11, each dual pipe drilling rod 11 are concentric two-layer pipe, and inner tube is hollow structure, Circular passage is formed between outer tube and inner tube；Each dual pipe drilling rod 11 is sequentially axial to be pierced in injected hole, detachable between each Connection；Before being in definition drilling, after being outside；

Drill bit 10 axially offers single-pass hole, is connected with the end of the dual pipe drilling rod 11 of front end, and be connected to；

Multiple hydraulic bag perfusion tubes 2, each hydraulic bag perfusion tube 2 are consistent with the length of a dual pipe drilling rod 11；Each liquid 2 front and back of pressure capsule perfusion tube is sequentially detachably connected and is connected；It is fitted closely with corresponding dual pipe drilling rod 11；The liquid of rearmost end Capsule perfusion tube 2 is pressed to be used for and 5 piping connection of electric hydraulic pump；

Hydraulic bag 1 is only starched, is a hollow resilient bladder body, is coated on outside the leading portion of dual pipe drilling rod 11 of front end Wall connect and is connected with the hydraulic bag perfusion tube 2 of front end；When being filled with liquid in cystidium, hydraulic bag 1 is only starched along brill Hole is radially expanded, and is fitted closely with borehole sidewall, forms seal area in the front of drilling；

The grouting method is as follows:

Step 1: starting drilling machine, setting high pressure water and wind feed system and first 11 piping connection of dual pipe drilling rod Count position drilling；

Step 2: removing high pressure water and wind feed system after drilling to the depth of the root dual pipe drilling rod 11, separately taking one Dual pipe drilling rod 11 and hydraulic bag perfusion tube 2 in hole dual pipe drilling rod 11 and hydraulic bag perfusion tube 2 connect, continue to drill, To the depth of the root dual pipe drilling rod 11；Continue to connect an other dual pipe drilling rod 11 and hydraulic bag perfusion tube 2, be repeated in Aforesaid operations, constantly extend dual pipe drilling rod 11 and with hydraulic bag perfusion tube 2, until drilling is to projected depth；Stopping after expansion Starch 1.5 times of the pressure in hydraulic bag 1 not less than design grouting pressure.

Step 3: hydraulic bag perfusion tube 2 is connected with electric hydraulic pump 5, each hydraulic bag perfusion tube 2 is passed sequentially through to only Liquid is injected in slurry hydraulic bag 1, is radially expanded it along drilling, hydraulic bag 1 is only starched and the side wall of drilling fits closely, before it Seal area is formed in drill with ferrule hole；

Step 4: removing high pressure water and wind feed system, the dual pipe drilling rod 11 of grouting system and rearmost end is connected, according to It is secondary by each dual pipe drilling rod 11 and drill bit 10 towards seal area slip casting, complete the slip casting of this section；Avoid slurries in hole wall sky Induration is formed in gap, is embraced drilling rod and is difficult to get rid of poverty.After grout cures, the liquid in hydraulic bag 1 is only starched in discharge, its is made to restore to receive Contracting state；

Step 5: retreat the length of a dual pipe drilling rod 11, a dual pipe drilling rod 11 of rearmost end and hydraulic is dismantled Capsule perfusion tube 2；

Step 6: step 4~five are repeated, segmenting slip casting, until completing the design slip casting requirement in drilling.

When this, which only starches hydraulic bag 1, is in contraction state, length is not less than 2m, and width is less than the widest part of drill bit 10 At least 2cm.When only slurry hydraulic bag 1 is in contraction state, only starches 1 length of hydraulic bag and be not less than 2m, width is less than drill bit 10 The widest part at least 2cm.During cleaning bottom of hole, hole slag can be smoothly discharged from hole wall gap；Only slurry 1 volume of hydraulic bag is swollen After swollen, closely drill bit 10, form the area Zhi Jiang with drilling front end, avoid slurries from forming induration in hole wall gap, influence to continue Hole drilling deslagging；Only slurry 1 length of hydraulic bag is greater than 2m, to have enough only slurry sealabilities after expanding.

A semi-circular recesses are provided in the axial direction on the outer wall of each dual pipe drilling rod 11, are used for clamping hydraulic bag perfusion tube 2；The internal diameter of each groove is consistent with the diameter of hydraulic bag perfusion tube 2.Each adjacent dual pipe drilling rod 11, adjacent hydraulic bag It is connected by quick coupling between perfusion tube 2.The selection of quick coupling 4 is suitable for the connector of pipe connection, in the prior art There is molding product.

A rubber is arranged at quick coupling between each adjacent dual pipe drilling rod 11, adjacent hydraulic bag perfusion tube 2 Set 3.A single tube is integrally communicated between a dual pipe drilling rod 11 and drill bit 10 for bottom hole.Buffer two kinds of slurries here in advance It is mixed.

High pressure water, wind feed system and the slip casting machine of periphery and drill bit are only starched into drilling rod and are segmented retrusive grouting device, group At a kind of quick grouting system of segmentation protrusive drilling rod, drilling rod is only starched including above-mentioned drill bit and is segmented retrusive grouting device, Further include: high pressure water and wind feed system, when drilling, high pressure water supply system and a dual pipe close to aperture are bored The outer tube piping connection of bar 11；High-pressure blast feed system and inner tube piping connection；Slurries machine and leans on adjacent pores when infusing double slurries The inner and outer tubes piping connection of a piece dual pipe drilling rod 11 of mouth outermost end；Electric hydraulic pump 5, with a liquid close to aperture Pressure 2 pipeline of capsule perfusion tube is detachably connected, for being filled with liquid into only slurry hydraulic bag 1.High pressure water, wind feed system and slurries Machine is all made of existing equipment, is selected according to the different for example required pressure of construction operating condition, speed etc..It is hydraulic during bore operation Capsule perfusion tube 2 is in an off state with electric hydraulic pump 5, avoids drilling rod rotation that hydraulic bag perfusion tube is caused to generate winding.

When actual borehole, operate as follows:

Drilling prepares:

Hydraulic bag perfusion tube 2 is embedded in the semi-circular recesses of 11 outer wall of dual pipe drilling rod, and is tied tight using rubber sleeve 3, Hydraulic bag perfusion tube 2 is in an off state with electric hydraulic pump 5 at this time, and hydraulic bag perfusion tube 2 can be same with dual pipe drilling rod 11 Step rotation；The inside and outside dual pipeline of dual pipe drilling rod 11 high-pressure blast and water have been separately connected.

Bore operation:

High-pressure blast and water are opened, starting drilling machine starts to drill, and after piercing a dual pipe drilling rod 11, extension one new dual Pipe drilling rod 11, while a new hydraulic bag perfusion tube 2 is connected using quick coupling 4, a new hydraulic bag perfusion tube 2 is embedded in new one In the semi-circular recesses of 11 outer wall of root dual pipe drilling rod, and newly-increased one piece of rubber sleeve 3 is tied tight；Similarly constantly extend dual pipe drilling rod 11 and hydraulic bag perfusion tube 2, increase drilling depth, until projected depth.

Slip casting prepares:

Hydraulic bag perfusion tube 2 is connected with electric hydraulic pump 5 by quick coupling 4, starts electric hydraulic pump 5, passes through The injection liquid into only slurry hydraulic bag 1 of hydraulic bag perfusion tube 2 makes its volume expansion, until the reading of pressure gauge 6 reaches design note 1.5 times for starching pressure form good sealing and stop slurry；High-pressure blast and water that dual pipe drilling rod 11 connects are removed, with slip casting machine It is connected；

Slip casting operation:

Rapid hardening slurries are injected into sealing area by slip casting machine, such as polyurethane or cement-sodium silicate double liquid, to This section of Cementer work terminates, and after grout cures, the liquid in hydraulic bag 1 is only starched in discharge, its is made to restore contraction state；

Retreat hydraulic bag perfusion tube 2:

The connection of hydraulic bag perfusion tube 2 at rear end minor details hydraulic bag perfusion tube 2 is disconnected, a hydraulic bag infusion is exited in rotation Pipe 2 removes rear end dual pipe drilling rod 11 and hydraulic bag perfusion tube 2.

Aforesaid operations are repeated, segmentation, which retreats, carries out slip casting operation, until completing the design slip casting requirement in this hole.