CN118008152A - Auxiliary pipe curtain construction positioning device and method thereof - Google Patents

Abstract

The invention discloses an auxiliary pipe curtain construction positioning device, namely a method, which belongs to the technical field of tunnel construction, and comprises a pipe curtain drilling machine, a drilling machine supporting platform for supporting the pipe curtain drilling machine, a pipe curtain drilling rod connected to the output end of the pipe curtain drilling machine, a down-the-hole hammer connected with the pipe curtain drilling rod, wherein the bending radian of an annular supporting steel frame corresponds to the construction position of pipe curtain drilling; the drilling machine supporting platform comprises a supporting plate which is horizontally arranged, a plurality of sliding seats which are fixed at the bottom of the supporting plate along the longitudinal interval of the supporting plate, an annular supporting arch which is in sliding fit with the sliding seats, and a locking piece which is used for locking the sliding seats and the annular supporting seats, wherein the annular supporting arch is parallel to the tunnel face, the bending radian of the annular supporting arch corresponds to that of an arc supporting steel frame, and the construction position of pipe curtain drilling can be changed by sliding the sliding seats along the annular supporting seats. The device and the method can be used for solving the technical problem that the pipe curtain is easy to deflect when the pipe curtain is drilled in tunnel engineering, and meanwhile, the construction cost can be saved.

Description

Auxiliary pipe curtain construction positioning device and method thereof

Technical Field

The invention belongs to the technical field of tunnel construction, and particularly relates to an auxiliary pipe curtain construction positioning device and method.

Background

In tunnel and underground engineering construction, can not avoid crossing bad geological section, because the country rock of bad stratum has relatively poor physical mechanical property of itself, consequently it is difficult to only rely on the preliminary bracing to keep the excavation face stable, excavation face unstability, cave body country rock collapse, phenomenon such as roof fall often take place at the excavation. Therefore, in the tunnel under the bad geological condition, advanced pre-supporting measures are usually adopted to improve the physical and mechanical properties of the soil body in front of the excavation face so as to ensure the stability of the excavation face and surrounding rock.

Compared with other types of advanced pre-support technology, the pipe curtain advanced pre-support is widely applied to tunnel and underground engineering construction with strict control on surface subsidence and surrounding rock deformation requirements, such as shallow burial, ultra shallow burial, tunnel entrance sections, and important underpass buildings, due to the characteristics of mature technology, high overall rigidity, strong surrounding rock deformation limiting capability and the like. Unlike pile foundation drilling, which is performed in a vertical direction, curtain drilling is often performed by horizontal drilling. In the actual pipe curtain construction process, when the first section is drilled, the drill bit and the drill rod are in a suspended state, and the tunnel face is not always at an included angle of 90 degrees with the drill bit due to the fact that the tunnel face is uneven, the drill bit is affected by gravity, and the drill bit is easy to slip downwards when drilling just begins to deviate from the original position.

Disclosure of Invention

Therefore, the invention aims to provide an auxiliary pipe curtain construction positioning device and an auxiliary pipe curtain construction positioning method, which are used for solving the technical problem that a pipe curtain is easy to deflect when being drilled in tunnel engineering, and meanwhile, the construction cost can be saved.

In order to achieve the above purpose, the present invention provides the following technical solutions:

The invention relates to an auxiliary pipe curtain construction positioning device which comprises a pipe curtain drilling machine, a drilling machine supporting platform for supporting the pipe curtain drilling machine, a pipe curtain drilling rod connected to the output end of the pipe curtain drilling machine, and a down-the-hole hammer connected with the pipe curtain drilling rod, wherein the axis of the pipe curtain drilling rod is perpendicular to a tunnel face, an annular supporting steel frame for the down-the-hole hammer is arranged close to the tunnel face, and the bending radian of the annular supporting steel frame corresponds to the construction position of pipe curtain drilling; the drilling machine supporting platform comprises a supporting plate which is horizontally arranged, a plurality of sliding seats which are fixed at the bottom of the supporting plate along the longitudinal interval of the supporting plate, an annular supporting arch which is in sliding fit with the sliding seats, and a locking piece which is used for locking the sliding seats and the annular supporting seats, wherein the annular supporting arch is parallel to the tunnel face, the bending radian of the annular supporting arch corresponds to that of the arc supporting steel frame, and the construction position of pipe curtain drilling can be changed by sliding the sliding seats along the annular supporting.

Further, annular support supplies including with slide sliding fit's restriction steel sheet, install the deformation sleeve board of keeping away from slide one side at the restriction steel sheet, deformation sleeve board adopts rubber materials to make, deformation sleeve board's inboard formation can hold fluidic cavity, set up on the deformation sleeve board with the gas pocket of cavity intercommunication, restriction steel sheet is used for restricting deformation sleeve board's deformation direction, through changing the fluidic pressure in the cavity, can change annular support and supply the crooked degree, connects through the trachea between the deformation sleeve board of two adjacent annular support supplies, can guarantee the uniformity of atmospheric pressure.

Further, the width of the limiting steel plate is larger than that of the deformation sleeve plate, and the part of the limiting steel plate exceeding the deformation sleeve plate is in limit fit with the boss of the sliding seat.

Further, the limit steel sheet is kept away from slide one side even interval and is fixed with a plurality of T type archs, the back side of deformation sleeve board forms the T type spout with protruding complex of T type, T type spout and the protruding one-to-one installation of T type.

Further, the retaining member is including fixing the pneumatic cylinder of backup pad upside, the output of pneumatic cylinder is connected with the arc friction disc, offered in the slide and be used for the movable displacement chamber of arc friction disc, the pneumatic cylinder can drive the surface contact of arc friction disc and restriction steel sheet after pneumatic.

Further, an anchor plate is fixed at the outer end of the limiting steel plate, one end of the anchor plate is hinged with the limiting steel plate, and the other end of the anchor plate is connected to the limiting steel plate through a fixing piece; the fixing piece comprises a first support, an inner rod, an outer rod, a pin shaft and a second support, wherein the first support is fixed on the anchor plate, the first support is hinged to one end of the inner rod, the other end of the inner rod is slidably arranged in the outer rod, the pin shaft is fixed to one end of the inner rod, which is located in the outer rod, a sliding groove matched with the pin shaft is formed in the outer side of the outer rod, the outer rod is hinged to the second support, and the second support is fixed to the outer side of the limiting steel plate.

Further, set up longitudinal guide way in the backup pad, the gyro wheel is installed to the lower part of pipe curtain rig, the gyro wheel passes through the guide way direction, the outside of pipe curtain drilling rod is provided with the pipe curtain steel pipe, install in the backup pad and be used for right the locating plate that the pipe curtain steel pipe was fixed a position, the upper end of locating plate is formed with the notch.

Further, the annular support steel frame is formed by connecting a plurality of arc-shaped I-shaped steel sections in a tail-to-tail mode, a connecting steel plate is fixed to the end portion of each arc-shaped I-shaped steel section, connecting holes are formed in the connecting steel plate, and the connecting holes of two adjacent arc-shaped I-shaped steel sections are connected through bolts.

Further, a vibration reduction plate is arranged between the connecting steel plates of the two adjacent arc-shaped I-shaped steel sections, and the bolts simultaneously penetrate through the through holes in the vibration reduction plate.

An auxiliary pipe curtain construction positioning method adopting the positioning device of any one of the above steps, comprising the following steps:

s1: before drilling, carrying out laser fixed point on the tunnel face by adopting a total station according to the pipe curtain design scheme, measuring the central position and elevation of each pipe curtain, marking on the tunnel face and coding a number;

S2: connecting the central position of each pipe curtain into a line, freeing the pipe curtain steel pipe position, and carrying out annular support steel frame under the central line of the pipe curtain position Fang Shizuo, wherein the distance between the edge of the annular support steel frame and the central line of the pipe curtain position is the radius of the pipe curtain steel pipe;

S3: after the pipe curtain drilling machine, the pipe curtain drill rod, the down-the-hole hammer and other pipe curtain equipment are assembled in place, drilling on the face is started; the right lower part of the down-the-hole hammer is tightly attached to the I-shaped steel frame, so that the down-the-hole hammer can be supported, and the downward deviation of a drill bit after the pipe curtain drilling machine is started is prevented;

s4: when the drill bit drills into the face, the formed holes can provide support for the drill bit, and the annular support steel frame does not play a role in positioning and supporting at the moment, and construction is carried out according to a preset drilling scheme;

S5: the hole is formed and hole cleaning is completed, pipe curtain steel pipe jacking is started, a first section of steel pipe is supported in front of a face when the annular support steel frame is jacked in, hole alignment is facilitated, and operation difficulty of constructors is reduced.

The invention has the beneficial effects that:

Compared with the traditional pipe curtain drilling, the auxiliary pipe curtain construction positioning device and method disclosed by the invention have the advantages that the annular I-shaped steel frame is mainly applied in front of the palm face according to the pipe curtain position, the pipe curtain drilling and pipe conveying can be positioned and supported through the supporting function of the annular supporting steel frame, the problem that the drill bit is easy to deviate downwards after the pipe curtain drilling machine is started is solved, the pipe conveying can be conveniently carried out, and the operation difficulty of constructors is reduced.

In the device disclosed by the invention, the construction position of pipe curtain drilling can be changed according to the actual pipe curtain position requirement by arranging a plurality of sliding seats and annular supporting arches which are in sliding fit with the sliding seats at the bottom of the supporting plate. The bending radian of the annular supporting arch corresponds to that of the arc supporting steel frame, so that the position of the annular supporting arch can be predetermined, and the locking piece is directly used for directly locking the annular supporting arch in place, so that the drilling position is not required to be frequently calibrated, the construction position is conveniently adjusted, and the construction efficiency is greatly improved.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objects and other advantages of the invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.

Drawings

In order to make the objects, technical solutions and advantageous effects of the present invention more clear, the present invention provides the following drawings for description:

FIG. 1 is a schematic diagram of the structure of the device of the present invention;

FIG. 2 is an enlarged view of FIG. 1 at A;

FIG. 3 is a front view of the device of the present invention;

FIG. 4 is a schematic view of the structure of a deformed sleeve plate;

FIG. 5 is a schematic view of a slider structure;

fig. 6 is a schematic structural view of an arc-shaped i-section.

The figures are marked as follows: the pipe curtain drilling machine 1, a drilling machine supporting platform 2, a pipe curtain drilling rod 3, a down-the-hole hammer 4, a tunnel face 5, an annular supporting steel frame 6, a supporting plate 7, a sliding seat 8, an annular supporting steel plate 9, a limiting steel plate 10, a deformation sleeve plate 11, a T-shaped bulge 12, a T-shaped sliding groove 13, a hydraulic cylinder 14, an air pipe 15, an arc friction plate 18, a displacement cavity 19, an anchoring plate 20, a first support 21, an inner rod 22, an outer rod 23, a pin shaft 24, a second support 25, a guide groove 27, a roller 28, a pipe curtain steel pipe 29, a positioning plate 30, an arc I-shaped steel section 31, a connecting steel plate 32, a connecting hole 33 and a vibration damping plate 34.

Detailed Description

As shown in fig. 1-6, the auxiliary pipe curtain construction positioning device disclosed by the invention comprises a pipe curtain drilling machine 1, a drilling machine supporting platform 2 for supporting the pipe curtain drilling machine 1, a pipe curtain drilling rod 3 connected to the output end of the pipe curtain drilling machine 1, and a down-the-hole hammer 4 connected with the pipe curtain drilling rod 3, wherein the axis of the pipe curtain drilling rod 3 is perpendicular to a tunnel face 5, and the pipe curtain drilling machine 1 is positioned at the rear end of the pipe curtain drilling rod 3 to drive the pipe curtain drilling rod 3 to rotate so as to realize drilling operation. The down-the-hole hammer 4 adopts the prior art and is matched with a drill to carry out rotary drilling. The drill rod enters the down-the-hole hammer 4 to generate impact force with a certain frequency, so that the rock is crushed, the hammer head is cooled by the discharged waste gas, and the rock scraps after being chiseled are discharged out of the hole.

The annular support steel frame 6 for the down-the-hole hammer 4 is arranged close to the tunnel face 5, the bending radian of the annular support steel frame 6 corresponds to the construction position of the pipe curtain drilling, namely, the shape of the annular support steel frame 6 corresponds to the pipe curtain center line to be constructed, and the frequent position adjustment of the steel frame support is reduced while the support is provided. The outer side surface of the annular support steel frame 6 is ensured to be smooth during construction so as to reduce the abrasion of the drill bit or the down-the-hole hammer 4.

Specifically, rig supporting platform 2 includes the backup pad 7 that the level set up, a plurality of slides 8 at backup pad 7 bottom are fixed along the longitudinal interval of backup pad 7, with slide 8 sliding fit's annular support arch, be used for carrying out the retaining member of locking between slide 8 and the annular support supplies 9, backup pad 7 is perpendicular with tunnel face 5, the annular support arch is parallel with tunnel face 5, the crooked radian of annular support arch corresponds with the crooked radian of arc support steelframe, through supplying 9 sliding slide 8 along the annular support, can change the construction position of pipe curtain drilling. Because the bending radian of the annular supporting arch corresponds to that of the arc supporting steel frame, the position of the annular supporting arch can be predetermined before construction, and the sliding seat 8 and the annular supporting seat 9 are directly locked by adopting the locking piece after the annular supporting arch is in place, the drilling position is not required to be frequently calibrated, the construction position is conveniently adjusted, and the construction efficiency is greatly improved.

In this embodiment, the annular support 9 includes a limiting steel plate 10 slidingly engaged with the slide 8, and a deformation sleeve plate 11 mounted on a side of the limiting steel plate 10 away from the slide 8, the deformation sleeve plate 11 is made of rubber material, the hardness of the limiting steel plate 10 is greater than that of the deformation sleeve plate 11, a cavity capable of containing fluid is formed on the inner side of the deformation sleeve plate 11, an air hole communicated with the cavity is formed in the deformation sleeve plate 11, the limiting steel plate 10 is used for limiting the deformation direction of the deformation sleeve plate 11, and the bending degree of the annular support 9 can be changed by changing the pressure of the fluid in the cavity. When in use, fluid can be introduced into the inner side of the deformation sleeve plate 11, so that the deformation sleeve plate 11 is hardened and expanded, the deformation sleeve plate 11 has a larger bending tendency, and the deformation tendency is more obvious when the internal pressure is larger. As the pressure increases, the annular support 9 can be made to become more curved. Therefore, to a certain extent, the bending degree of the annular support 9 can be changed by changing the pressure of the fluid in the cavity, so that the construction of tunnel face 5 with different sizes can be adapted, and the materials and construction cost are saved.

In this embodiment, the width of the limiting steel plate 10 is larger than the width of the deformation sleeve plate 11, and the part of the limiting steel plate 10 beyond the deformation sleeve plate 11 is in limit fit with the boss of the slide seat 8. Can play a limiting role to prevent the slide 8 from falling out of the limiting steel plate 10. Of course, the engagement of the slide 8 with the restraining steel plate 10 is not a complete surface contact engagement, so that the engagement of the two can accommodate bending variations of the restraining steel plate 10 without impeding the relative movement of the two.

In this embodiment, a plurality of T-shaped protrusions 12 are uniformly fixed at intervals on one side of the limiting steel plate 10 far away from the sliding seat 8, a T-shaped chute 13 matched with the T-shaped protrusions 12 is formed on the back side of the deformation sleeve plate 11, and the T-shaped chute 13 is installed in one-to-one correspondence with the T-shaped protrusions 12. The limiting steel plate 10 and the deformation sleeve plate 11 can be conveniently detached and installed, so that the worn limiting steel plate 10 can be conveniently replaced, and the cost is saved.

In this embodiment, the retaining member includes the pneumatic cylinder 14 of fixing in backup pad 7 upside, and the output of pneumatic cylinder 14 is connected with arc friction disc 18, has offered the displacement chamber 19 that is used for arc friction disc 18 activity in the slide 8, and pneumatic cylinder 14 can drive arc friction disc 18 and restriction steel sheet 10's surface contact, can realize spacing effect, can inject the position of slide 8 and backup pad 7.

In this embodiment, the outer end of the limiting steel plate 10 is fixed with an anchor plate 20, and the anchor plate 20 is used for anchoring on the ground to prevent the annular support 9 from shaking. Wherein one end of the anchor plate 20 is hinged to the restraining steel plate 10 to accommodate bending variations of the restraining steel plate 10 prior to construction. The other end of the anchor plate 20 is connected to the limiting steel plate 10 by a fixing member; the mounting includes first support 21, interior pole 22, outer pole 23, round pin axle 24 and second support 25, first support 21 is fixed on anchor board 20, first support 21 is articulated with the one end of interior pole 22, the other end slip setting of interior pole 22 is in outer pole 23, the one end that interior pole 22 is located outer pole 23 is fixed with round pin axle 24, the spout with round pin axle 24 complex is seted up in the outside of outer pole 23, round pin axle 24 passes through threaded connection nut with round pin axle 24 lock in the outside of outer pole 23, outer pole 23 is articulated with second support 25, the outside at restriction steel sheet 10 is fixed to second support 25. By locking the position between the anchor plate 20 and the limiting steel plate 10, the position of the anchor plate 20 is ensured to be horizontal, and the annular support 9 is conveniently fixed.

In some other embodiments, a longitudinal guide groove 27 is formed in the supporting plate 7, a roller 28 is mounted at the lower part of the pipe curtain drilling machine 1, the roller 28 is guided by the guide groove 27, a pipe curtain steel pipe 29 is arranged at the outer side of the pipe curtain drilling rod 3, a positioning plate 30 for positioning the pipe curtain steel pipe 29 is mounted on the supporting plate 7, and a notch is formed at the upper end of the positioning plate 30, so that the pipe curtain steel pipe 29 is supported conveniently.

In some other embodiments, the annular supporting steel frame 6 is formed by connecting a plurality of arc-shaped I-shaped steel sections 31 in an ending mode, a connecting steel plate 32 is fixed to the end portion of each arc-shaped I-shaped steel section 31, connecting holes 33 are formed in the connecting steel plate 32, and the connecting holes 33 of two adjacent arc-shaped I-shaped steel sections 31 are connected through bolts. The two adjacent arc-shaped I-steel sections 31 cannot be welded and dead, so that the pipe curtain can be conveniently disassembled, recycled and reused after construction. The annular supporting steel frame 6 in front of the tunnel face can be provided with a foot locking anchor pipe by punching on the tunnel wall foot, two ends of the positioning I-steel wall foot are fixed on surrounding rocks, and the positioning I-steel wall foot is prevented from slipping and tilting to the outer side of the tunnel face.

In this embodiment, install damping plate 34 between the connection steel sheet 32 of two adjacent arc I-steel sections 31, the bolt passes the through-hole on the damping plate 34 simultaneously, and damping plate 34 adopts rubber materials to make, through setting up damping plate 34, can be used for the damping when the drill bit is under construction, prevents annular support steelframe 6 not hard up, can improve the security and the precision of device.

The auxiliary pipe curtain construction positioning method adopts the positioning device of any one of the above steps:

S1: before drilling, carrying out laser fixed point on the tunnel face 5 by adopting a total station according to the pipe curtain design scheme, measuring the central position and elevation of each pipe curtain, marking on the tunnel face 5 and coding a number;

S2: connecting the central position of each pipe curtain into a line, emptying the positions of the pipe curtain steel pipes 29, and annularly supporting the steel frame 6 below the central line of the pipe curtain position Fang Shizuo, wherein the distance between the edge of the annular supporting steel frame 6 and the central line of the pipe curtain position is the radius of the pipe curtain steel pipes 29; the steel frame 6 is supported in a ring shape under the central line of the pipe curtain position Fang Shizuo, the face surface needs to be as smooth as possible, the I-steel needs to be closely attached to the face surface, and theoretically, the distance between the upper edge of the I-steel and the central line of the pipe curtain position is the radius of the pipe curtain steel pipe 29.

S3: after the pipe curtain drilling machine 1, the pipe curtain drill rod 3, the down-the-hole hammer 4 and other pipe curtain equipment are assembled in place, drilling on the tunnel face is started; the right lower part of the down-the-hole hammer 4 is tightly attached to the I-shaped steel frame, so that the down-the-hole hammer 4 can be supported, and the downward deviation of a drill bit after the pipe curtain drilling machine 1 is started is prevented;

S4: when the drill bit drills into the face, the formed holes can provide support for the drill bit, and the annular support steel frame 6 does not play a role in positioning and supporting at the moment, and construction is carried out according to a preset drilling scheme;

S5: the hole is formed and hole cleaning is completed, pipe curtain steel pipe 29 jacking is started, support is provided before the face of the palm face when the annular support steel frame 6 simultaneously jacks the first section of steel pipe, hole alignment is facilitated, and operation difficulty of constructors is reduced.

Finally, it is noted that the above-mentioned preferred embodiments are only intended to illustrate rather than limit the invention, and that, although the invention has been described in detail by means of the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention as defined by the appended claims.

Claims (10)

1. An auxiliary pipe curtain construction positioner, its characterized in that: the pipe curtain drilling machine comprises a pipe curtain drilling machine, a drilling machine supporting platform for supporting the pipe curtain drilling machine, a pipe curtain drilling rod connected to the output end of the pipe curtain drilling machine and a down-the-hole hammer connected with the pipe curtain drilling rod, wherein the axis of the pipe curtain drilling rod is perpendicular to a tunnel face, an annular supporting steel frame for the down-the-hole hammer is arranged close to the tunnel face, and the bending radian of the annular supporting steel frame corresponds to the construction position of pipe curtain drilling; the drilling machine supporting platform comprises a supporting plate which is horizontally arranged, a plurality of sliding seats which are fixed at the bottom of the supporting plate along the longitudinal interval of the supporting plate, an annular supporting arch which is in sliding fit with the sliding seats, and a locking piece which is used for locking the sliding seats and the annular supporting seats, wherein the annular supporting arch is parallel to the tunnel face, the bending radian of the annular supporting arch corresponds to that of the arc supporting steel frame, and the construction position of pipe curtain drilling can be changed by sliding the sliding seats along the annular supporting.

2. The auxiliary pipe curtain construction positioning device according to claim 1, wherein: the annular support supplies including with slide sliding fit's restriction steel sheet, install the deformation sleeve board of keeping away from slide one side at the restriction steel sheet, the deformation sleeve board adopts rubber materials to make, the inboard formation of deformation sleeve board can hold fluidic cavity, set up on the deformation sleeve board with the gas pocket of cavity intercommunication, the restriction steel sheet is used for restricting the deformation direction of deformation sleeve board, through the pressure that changes the fluid in the cavity, can change the crooked degree that annular support supplied.

3. An auxiliary pipe curtain construction positioning device according to claim 2, wherein: the width of the limiting steel plate is larger than that of the deformation sleeve plate, and the part of the limiting steel plate exceeding the deformation sleeve plate is in limit fit with the boss of the sliding seat.

4. An auxiliary pipe curtain construction positioning device according to claim 3, wherein: a plurality of T-shaped bulges are uniformly fixed on one side, far away from the sliding seat, of the limiting steel plate at intervals, T-shaped sliding grooves matched with the T-shaped bulges are formed in the back side of the deformation sleeve plate, and the T-shaped sliding grooves are installed in one-to-one correspondence with the T-shaped bulges.

5. The auxiliary pipe curtain construction positioning device according to claim 4, wherein: the locking piece is including fixing the pneumatic cylinder of backup pad upside, the output of pneumatic cylinder is connected with the arc friction disc, offer in the slide and be used for the displacement chamber of arc friction disc activity, the pneumatic cylinder can drive the surface contact of arc friction disc and restriction steel sheet after pneumatic.

6. An auxiliary pipe curtain construction positioning device according to claim 2, wherein: an anchor plate is fixed at the outer end of the limiting steel plate, one end of the anchor plate is hinged with the limiting steel plate, and the other end of the anchor plate is connected to the limiting steel plate through a fixing piece; the fixing piece comprises a first support, an inner rod, an outer rod, a pin shaft and a second support, wherein the first support is fixed on the anchor plate, the first support is hinged to one end of the inner rod, the other end of the inner rod is slidably arranged in the outer rod, the pin shaft is fixed to one end of the inner rod, which is located in the outer rod, a sliding groove matched with the pin shaft is formed in the outer side of the outer rod, the outer rod is hinged to the second support, and the second support is fixed to the outer side of the limiting steel plate.

7. The auxiliary pipe curtain construction positioning device according to claim 1, wherein: the pipe curtain drilling machine is characterized in that a longitudinal guide groove is formed in the supporting plate, a roller is mounted at the lower part of the pipe curtain drilling machine, the roller is guided by the guide groove, a pipe curtain steel pipe is arranged on the outer side of the pipe curtain drilling rod, a positioning plate used for positioning the pipe curtain steel pipe is mounted on the supporting plate, and a notch is formed in the upper end of the positioning plate.

8. An auxiliary pipe curtain construction positioning device according to any one of claims 1-7, wherein: the annular support steel frame is formed by connecting a plurality of arc-shaped I-shaped steel sections in a tail-to-tail mode, a connecting steel plate is fixed to the end portion of each arc-shaped I-shaped steel section, connecting holes are formed in the connecting steel plate, and the connecting holes of two adjacent arc-shaped I-shaped steel sections are connected through bolts.

9. The auxiliary pipe curtain construction positioning device according to claim 8, wherein: and a vibration reduction plate is arranged between the connecting steel plates of the two adjacent arc-shaped I-shaped steel sections, and the bolts simultaneously pass through the through holes in the vibration reduction plate.

10. An auxiliary pipe curtain construction positioning method is characterized by comprising the following steps of: use of a positioning device according to any of claims 1-9, comprising the steps of:

s1: before drilling, carrying out laser fixed point on the tunnel face by adopting a total station according to the pipe curtain design scheme, measuring the central position and elevation of each pipe curtain, marking on the tunnel face and coding a number;

S2: connecting the central position of each pipe curtain into a line, freeing the pipe curtain steel pipe position, and carrying out annular support steel frame under the central line of the pipe curtain position Fang Shizuo, wherein the distance between the edge of the annular support steel frame and the central line of the pipe curtain position is the radius of the pipe curtain steel pipe;

S3: after the pipe curtain drilling machine, the pipe curtain drill rod, the down-the-hole hammer and other pipe curtain equipment are assembled in place, drilling on the face is started; the right lower part of the down-the-hole hammer is tightly attached to the I-shaped steel frame, so that the down-the-hole hammer can be supported, and the downward deviation of a drill bit after the pipe curtain drilling machine is started is prevented;

s4: when the drill bit drills into the face, the formed holes can provide support for the drill bit, and the annular support steel frame does not play a role in positioning and supporting at the moment, and construction is carried out according to a preset drilling scheme;

S5: the hole is formed and hole cleaning is completed, pipe curtain steel pipe jacking is started, a first section of steel pipe is supported in front of a face when the annular support steel frame is jacked in, hole alignment is facilitated, and operation difficulty of constructors is reduced.