CN111271103A

CN111271103A - Deep hole anchor fixing device

Info

Publication number: CN111271103A
Application number: CN202010303363.8A
Authority: CN
Inventors: 储顺清; 王辉
Original assignee: Anhui Qilushi Engineering Technology Development Co ltd
Current assignee: Anhui Qilushi Engineering Technology Development Co ltd
Priority date: 2020-04-17
Filing date: 2020-04-17
Publication date: 2020-06-12

Abstract

The invention belongs to the technical field of tunnel construction, and particularly relates to a deep hole anchor fixing device which comprises an anchor and a hole sealing device, wherein when reaching the inner end of an anchor hole, the anchor is extruded by the inner end surface of the anchor hole, an expansion block can be automatically popped out, and the expansion block is tensioned on the inner wall of the anchor hole to realize the primary fixing of the anchor, so that convenience is provided for subsequent construction; the hole sealing device disclosed by the invention can be tightly combined with the inner wall of the anchor hole by adopting the grouting pipe for grouting after being sent into the inner end of the anchor hole, so that axial supporting force is provided for the anchor at the inner end of the hole sealing device, the liquid filling bags at two ends are firstly grouted during grouting, and the liquid filling bags are tensioned on the inner wall of the anchor hole after being expanded, so that the hole sealing device has the function of fixing the hole sealing device on one hand, and on the other hand, the phenomenon that the mechanical mechanism of the anchor fails because the slurry enters the space where the anchor.

Description

Deep hole anchor fixing device

Technical Field

The invention belongs to the technical field of tunnel construction, and particularly relates to a deep hole anchorage fixing device.

Background

After the tunnel vault is excavated, the vault needs to be reinforced in order to guarantee the subsequent construction safety and the later tunnel structural strength, the traditional method generally adopts a tie bar for reinforcement, namely the tie bar is inserted along the vault cambered surface, so that the vault inner wall and the rock mass in the mountain are connected into a whole, however, a plurality of problems exist in the reinforcement construction process, for example, in the process of inserting the top tie bar, holes are all inverted holes with downward openings, the traditional reinforcement construction basically depends on manual threading, the manual lifting tie bar has high labor intensity, the tie bar has the risk of falling downwards, and the construction difficulty is large; in addition, part of tunnels are limited by space, and long tie bars cannot be inserted, so that great limitation is caused to tunnel design and construction.

Disclosure of Invention

The invention aims to provide a deep hole anchor fixing device which can be used for efficiently and reliably fixing an anchor in an inverted anchor hole.

The technical scheme adopted by the invention is as follows:

a fixing device for a deep-hole anchor comprises an anchor and a hole sealing device, wherein the anchor comprises an anchor body, an expansion block and a driving block are arranged on the anchor body in a movable mode along the radial direction, the driving block is used for driving the expansion block to expand outwards along the radial direction, a first elastic unit is arranged between the driving block and the anchor body, and the first elastic unit is assembled to enable the elastic force of the first elastic unit to drive the driving block to drive the expansion block to expand outwards along the radial direction; the locking mechanism is assembled to prevent the driving block from driving the expansion block to expand outwards along the radial direction when the locking mechanism is in a locking state, and the unlocking mechanism is assembled to be extruded by the inner end face of the anchor hole and trigger the locking mechanism to unlock when the anchor body reaches the inner end of the anchor hole; the hole sealing device comprises an inner disc, an outer disc and a central shaft for connecting the inner disc and the outer disc, annular liquid filling bags are arranged on the outer ring surfaces of the inner disc and the outer disc, the liquid filling bags on the inner disc and the outer disc are communicated with each other, a liquid filling valve is arranged on the outer disc and comprises a liquid inlet, a first liquid outlet and a second liquid outlet, the liquid inlet is communicated with a grouting pipeline, the first liquid outlet is communicated with the liquid filling bags on the outer disc, the second liquid outlet is communicated with an annular space between the inner disc and the outer disc, and the liquid filling valve is assembled to be capable of being switched between the following two stations: a first station, wherein a liquid inlet is communicated with a first liquid outlet; the liquid inlet is communicated with the second liquid outlet; the hole sealing device is positioned at the outer end of the anchorage device, and the inner disc is abutted against the outer end face of the anchorage device.

At least two expansion blocks are symmetrically arranged along the circumferential direction of the anchor body; the driving block is movably arranged along the axial direction of the anchor body, the expansion block is provided with a wedge surface, the driving block is provided with a wedge driving surface matched with the wedge surface, the elastic force of the first elastic unit acts on the driving block along the axial direction of the anchor body, and the assembling direction of the wedge surface and the wedge driving surface is set to be capable of driving the expansion block to expand outwards along the radial direction of the anchor body when the driving block slides towards the outer side of the anchor hole; and the driving block is provided with a cable hole for connecting a steel strand.

The locking mechanism comprises a first end face adjacent to the wedge face and a second end face adjacent to the wedge driving face, the first end face and the second end face are perpendicular to the axial direction of the anchor device body, and the locking mechanism is in a locking state when the first end face and the second end face are in blocking connection and are mutually abutted under the action of the first elastic unit; when the expansion block slides outwards along the anchor body in the radial direction for a preset distance, the first end face can be separated from the second end face, the wedge face and the wedge driving face are mutually abutted under the action of the first elastic unit, and at the moment, the locking mechanism is in an unlocking state.

The unlocking mechanism is assembled to drive the driving block in the locking state to slide outwards along the radial direction of the anchor body for the preset distance when the unlocking mechanism is extruded by the inner end face of the anchor hole; the unlocking mechanism comprises a push block which is movably arranged along the axial direction of the anchor device body, an inclined plane matched with the wedge surface is arranged on the push block, a push rod is connected to the push block and is arranged in parallel to the axial direction of the anchor device body, and the push rod extends to the outer side of the top end of the anchor device body in a protruding mode and extends towards the inner end face of the anchor hole in a protruding mode.

A second elastic unit is arranged between the ejector rod or the push block and the anchorage device body, and the second elastic unit is assembled to enable the elastic force of the second elastic unit to drive the ejector rod and the push block to protrude towards the top of the anchorage device body; one end of the ejector rod, which protrudes to the outside of the anchorage device body, is connected with a push plate; the anchor device body is radially provided with a T-shaped sliding groove, and the expansion block is provided with a T-shaped block in sliding fit with the T-shaped sliding groove; one side of the expansion block facing the inner wall of the anchor hole is an arc surface, and a convex nail is arranged on the arc surface.

The anchor device body comprises a first disc body and a second disc body, wherein the axes of the first disc body and the second disc body are arranged at intervals, and the first disc body and the second disc body are connected into a whole through a center column; the driving block and the expansion block are axially distributed between the first disc body and the second disc body along the central column, the expansion block is arranged on the first disc body in a sliding mode, the driving block is close to the second disc body, and the first elastic unit is a pressure spring arranged between the second disc body and the driving block; the ejector rod is arranged on the second disc body in a sliding manner; the second elastic unit is a pressure spring arranged between the push plate and the end face of the second disc body.

Still include forced induction actuating mechanism, forced induction actuating mechanism is assembled to be in when the pressure in the liquid filling bag does not reach preset pressure the prefill valve is in station one, and when the pressure in the liquid filling bag reaches preset pressure forced induction actuating mechanism drive prefill valve switch to station two.

The liquid filling valve comprises a valve shell and a valve core, a cylindrical inner cavity is arranged in the valve shell, the liquid inlet, the first liquid outlet and the second liquid outlet are communicated with the cylindrical inner cavity, the first liquid outlet and the second liquid outlet are respectively positioned at two sides of the liquid inlet, the valve core is arranged in the cylindrical inner cavity in a sliding mode, an annular groove is formed in the outer annular surface of the valve core, the annular groove is positioned between the liquid inlet and the first liquid outlet when the liquid filling valve is positioned at a station I, and the annular groove is positioned between the liquid inlet and the second liquid outlet when the liquid filling valve is positioned at; the valve core is provided with a transmission rod which is convexly extended towards one side of the inner disc, the transmission rod is extended to the outside of the valve shell, a third elastic unit is arranged between the transmission rod and the valve shell, and the third elastic unit is assembled to enable the elastic force of the third elastic unit to drive the valve core to slide from the station to the station II; the pressure-sensitive stop pin device is arranged on the inner disc and is abutted against the transmission rod to prevent the transmission rod from sliding to the second station under the action of the third elastic unit when the pressure of the liquid filling bag of the inner disc is smaller than the preset pressure, and the pressure-sensitive stop pin device can avoid the transmission rod to enable the transmission rod to drive the valve core to switch to the second station under the action of the third elastic unit when the pressure of the liquid filling bag of the inner disc is larger than the preset pressure.

The pressure-sensitive stop pin device comprises a telescopic pin, a stop pin and a fourth elastic unit, the telescopic pin is arranged along the radial direction of the inner disc in a sliding manner, and the outer end of the telescopic pin protrudes to the outside of the outer ring surface of the inner disc and extrudes the liquid filling sac; the fourth elastic unit is positioned at the inner end of the telescopic pin and used for pushing the telescopic pin outwards, the stop pin is arranged in a protruding mode along the radial direction of the telescopic pin, and the stop pin protrudes out of one side where the outer disc is positioned and is in blocking connection with the end portion of the transmission rod; when the liquid filling bag on the inner disc reaches the preset pressure, the telescopic pin is compressed inwards, and the stop pin is separated from the end of the transmission rod at the moment.

A rigid pipeline for the steel strand to pass through is further arranged between the inner disc and the outer disc, and a central hole of the rigid pipeline penetrates through the disc surfaces of the inner disc and the outer disc; an exhaust hole is formed in the end face, opposite to the outer disc, of one side of the inner disc, and the exhaust hole is communicated to the lower end of the central column through the radial direction of the inner disc and the axial direction of the central column; the liquid filling bags are embedded in the annular grooves; the telescopic pin is arranged at the far end of the liquid inlet end of the liquid filling bag on the inner disc.

The invention has the technical effects that: when the anchor device reaches the inner end of the anchor hole, the anchor device is extruded by the inner end face of the anchor hole, so that the expansion block can be automatically ejected out, and the expansion block is tensioned on the inner wall of the anchor hole to realize the initial fixation of the anchor device, thereby providing convenience for subsequent construction; the hole sealing device disclosed by the invention can be tightly combined with the inner wall of the anchor hole by adopting the grouting pipe for grouting after being sent into the inner end of the anchor hole, so that axial supporting force is provided for the anchor at the inner end of the hole sealing device, the liquid filling bags at two ends are firstly grouted during grouting, and the liquid filling bags are tensioned on the inner wall of the anchor hole after being expanded, so that the hole sealing device has the function of fixing the hole sealing device on one hand, and on the other hand, the phenomenon that the mechanical mechanism of the anchor fails because the slurry enters the space where the anchor.

Drawings

Fig. 1 is a perspective view of a tunnel vault reinforcement construction system provided by an embodiment of the present invention;

FIG. 2 is a side view of a tunnel vault reinforcement construction system provided by an embodiment of the present invention;

FIG. 3 is the upper half of the cross-sectional view A-A of FIG. 2;

FIG. 4 is a lower half of the section A-A of FIG. 2;

FIG. 5 is a perspective view of an anchor and sealing device according to an embodiment of the present invention;

FIG. 6 is a perspective view of an anchor pushing device provided in accordance with an embodiment of the present invention;

fig. 7 is an exploded view of an anchor and a sealing device according to an embodiment of the present invention.

Detailed Description

In order that the objects and advantages of the invention will be more clearly understood, the following description is given in conjunction with the accompanying examples. It is to be understood that the following text is merely illustrative of one or more specific embodiments of the invention and does not strictly limit the scope of the invention as specifically claimed.

Example 1

As shown in fig. 1 and 2, a tunnel vault reinforcement construction system comprises an anchor 10, an anchor pushing device 30 and a hole sealing device 20, as shown in fig. 3, 5 and 7, the anchor 10 comprises an anchor body 11, an expansion block 12 movably arranged in the radial direction is arranged on the anchor body 11, and a driving block 13 for driving the expansion block 12 to expand outwards in the radial direction, a first elastic unit 15 is arranged between the driving block 13 and the anchor body 11, and the first elastic unit 15 is assembled so that the elastic force of the first elastic unit can drive the driving block 13 to drive the expansion block 12 to expand outwards in the radial direction; the locking mechanism is assembled to prevent the driving block 13 from driving the expansion block 12 to expand outwards in the radial direction when the locking mechanism is in a locking state, and the unlocking mechanism is assembled to be extruded by the inner end face of the anchor hole when the anchor body 11 reaches the inner end of the anchor hole and trigger the locking mechanism to unlock; when the anchor 10 reaches the inner end of the anchor hole, the expansion block 12 can be automatically ejected out by being extruded by the inner end surface of the anchor hole, and the expansion block 12 is tensioned on the inner wall of the anchor hole to realize the initial fixation of the anchor 10, thereby providing convenience for subsequent construction. As shown in fig. 3, 5 and 7, the sealing device 20 is located outside the anchor 10, the sealing device 20 is fixedly connected to the anchor 10, the sealing device 20 includes an inner disc 21, an outer disc 22, and a central shaft 23 connecting the inner disc 21 and the outer disc 22, annular liquid-filled bags 24 are disposed on outer circumferential surfaces of the inner disc 21 and the outer disc 22, the liquid-filled bags 24 on the inner disc 21 and the outer disc 22 are communicated with each other, a liquid-filled valve 25 is disposed on the outer disc 22, the liquid-filled valve 25 includes a liquid inlet 253, a first liquid outlet 254 and a second liquid outlet 255, the liquid inlet 253 is communicated with a grouting pipeline 27, the first liquid outlet 254 is communicated with the liquid-filled bag 24 on the outer disc 22, the second liquid outlet 255 is communicated with an annular space between the inner disc 21 and the outer disc 22, and the liquid-filled valve 25 is configured to be capable of being switched between: in the first working position, the liquid inlet 253 is communicated with the first liquid outlet 254; a second station, wherein the liquid inlet is communicated with a second liquid outlet 255, and the inner disc 21 is attached to the end face of the outer side of the anchorage device 10; the hole sealing device 20 provided by the invention can be tightly combined with the inner wall of the anchor hole by adopting a grouting pipe for grouting after being sent into the inner end of the anchor hole, so that axial supporting force is provided for the anchor 10 at the inner end, the liquid filling bags 24 at two ends are firstly grouted during grouting, and the liquid filling bags 24 are tensioned on the inner wall of the anchor hole after being expanded, so that the hole sealing device 20 is fixed, and the mechanical mechanism of the anchor 10 can be prevented from being failed due to the fact that slurry enters the space where the anchor 10 is located in the subsequent grouting process. As shown in fig. 4 and 6, the anchor pushing device 30 includes a push rod 31 and a push rod conveying mechanism, the outer disc 22 is detachably mounted on the top end of the push rod 31, the push rod conveying mechanism is mounted on a workbench 38, the push rod conveying mechanism is used for conveying the push rod 31 to penetrate into the anchor hole, the push rod conveying mechanism includes a conveying pair roller 32 and a non-return mechanism 33, the non-return mechanism 33 is assembled to freely pass through the non-return mechanism 33 when the push rod 31 moves into the anchor hole, and the non-return mechanism 33 can clamp the push rod 31 to prevent the push rod 31 from exiting when the push rod 31 exits from the anchor hole. The anchor pushing device 30 can effectively send the anchor 10 into the arch crown anchor hole, so that the labor is saved, in addition, the pushing angle of the anchor pushing device 30 is adjustable, the construction of pore canals with different angles can be adapted, the equipment cost is reduced, in addition, the anchor pushing device 30 is provided with the check mechanism 33, the push rod 31 can be prevented from falling down due to slipping in the pushing process, and the safety is improved.

Preferably, at least two expansion blocks 12 are symmetrically arranged along the circumferential direction of the anchor body 11; the driving block 13 is movably arranged along the axial direction of the anchor body 11, the expansion block 12 is provided with a wedge surface 121, the driving block 13 is provided with a wedge driving surface 131 matched with the wedge surface 121, the elastic force of the first elastic unit 15 acts on the driving block 13 along the axial direction of the anchor body 11, and the assembling direction of the wedge surface 121 and the wedge driving surface 131 is set to be capable of driving the expansion block 12 to expand outwards along the radial direction of the anchor body 11 when the driving block 13 slides towards the outside of the anchor hole; the driving block 13 is provided with a cable hole for connecting the steel strand 40. The locking mechanism comprises a first end face adjacent to the wedge face 121 and a second end face adjacent to the wedge driving face 131, the first end face and the second end face are perpendicular to the axial direction of the anchor body 11, and the locking mechanism is in a locking state when the first end face and the second end face are in blocking connection and are mutually abutted under the action of the first elastic unit 15; when the expansion block 12 slides outwards along the anchor body 11 in the radial direction for a preset distance, the first end face can be separated from the second end face, the wedge face 121 and the wedge driving face 131 are mutually abutted under the action of the first elastic unit 15, and at the moment, the locking mechanism is in an unlocking state; the unlocking mechanism is assembled to drive the driving block 13 in the locking state to slide outwards along the radial direction of the anchor body 11 by the preset distance when the unlocking mechanism is extruded by the inner end face of the anchor hole; the unlocking mechanism comprises a push block 14 which is movably arranged along the axial direction of the anchor body 11, an inclined surface matched with the wedge surface 121 is arranged on the push block 14, a push rod 141 is connected on the push block 14, the push rod 141 is arranged in parallel to the axial direction of the anchor body 11, and the push rod 141 protrudes to the outer side of the top end of the anchor body 11 and protrudes towards the inner end surface of the anchor hole. The working principle of the expansion block 12 is as follows: when the anchor 10 does not reach the inner end of the anchor hole, the anchor 10 is as shown in fig. 3, at this time, the expansion block 12 is in a contracted state, the wedge driving surface 131 of the driving block 13 is staggered with the wedge surface 121 of the expanded block, and when the anchor 10 reaches the inner end of the anchor hole and is extruded by the inner end surface of the anchor hole, the pushing block 14 pushes the expansion block 12 to slide outwards for a distance just enough to make the wedge driving surface 131 of the driving block 13 fit with the wedge surface 121 of the expansion block 12, at this time, the driving block 13 pushes the expansion block 12 to pop out quickly under the action of the first elastic unit 15, so as to realize the primary fixation of the anchor 10.

Preferably, a second elastic unit 143 is disposed between the ejector rod 141 or the push block 14 and the anchor body 11, and the second elastic unit 143 is assembled such that the elastic force thereof can drive the ejector rod 141 and the push block 14 to protrude towards the top of the anchor body 11; one end of the ejector rod 141 protruding to the outside of the anchorage body 11 is connected with a push plate 142; a T-shaped sliding groove is formed in the anchor device body 11 along the radial direction, and a T-shaped block in sliding fit with the T-shaped sliding groove is arranged on the expansion block 12; one side of the expansion block 12 facing the inner wall of the anchor hole is an arc surface, and a convex nail is arranged on the arc surface to increase the friction force between the expansion block 12 and the inner wall of the anchor hole. The anchor device body 11 comprises a first disc body 111 and a second disc body 112, wherein the axes of the first disc body 111 and the second disc body 112 are arranged at intervals, and the first disc body 111 and the second disc body 112 are connected into a whole through a center column 113; the driving block 13 and the expansion block 12 are axially distributed between the first disc body 111 and the second disc body 112 along the center post 113, wherein the expansion block 12 is slidably arranged on the first disc body 111, the driving block 13 is arranged close to the second disc body 112, and the first elastic unit 15 is a pressure spring arranged between the second disc body 112 and the driving block 13; the top rod 141 is arranged on the second disc body 112 in a sliding manner; the second elastic unit 143 is a compression spring provided between the push plate 142 and the end surface of the second tray 112.

Further, the hole sealing device 20 further includes a pressure-sensitive driving mechanism, which is configured to drive the liquid filling valve 25 to be at the first station when the pressure in the liquid filling bag 24 does not reach the preset pressure, and to drive the liquid filling valve 25 to be switched to the second station when the pressure in the liquid filling bag 24 reaches the preset pressure. Specifically, the liquid filling valve 25 comprises a valve housing 251 and a valve core 252, a cylindrical inner cavity is arranged in the valve housing 251, the liquid inlet 253, the first liquid outlet 254 and the second liquid outlet 255 are all communicated with the cylindrical inner cavity, the first liquid outlet 254 and the second liquid outlet 255 are respectively positioned at two sides of the liquid inlet 253, the valve core 252 is slidably arranged in the cylindrical inner cavity, an annular groove is arranged on the outer annular surface of the valve core 252, when the liquid filling valve 25 is positioned at a first station, the annular groove is positioned between the liquid inlet 253 and the first liquid outlet 254, and when the liquid filling valve 25 is positioned at a second station, the annular groove is positioned between the liquid inlet 253 and the second liquid outlet; a transmission rod 256 which is convexly arranged towards one side of the inner disk 21 is arranged on the valve core 252, the transmission rod 256 protrudes out of the valve shell 251, a third elastic unit 257 is arranged between the transmission rod 256 and the valve shell 251, and the third elastic unit 257 is assembled so that the elastic force of the third elastic unit can drive the valve core 252 to slide from the working position to the working position II; the inner disc 21 is provided with a pressure-sensitive stop pin device, the pressure-sensitive stop pin device is assembled to abut against the transmission rod 256 to prevent the transmission rod 256 from sliding to the second station under the action of the third elastic unit 257 when the pressure of the liquid filling bag 24 of the inner disc 21 is smaller than a preset pressure, and the pressure-sensitive stop pin device can avoid the transmission rod 256 to enable the transmission rod 256 to drive the valve core 252 to switch to the second station under the action of the third elastic unit 257 when the pressure of the liquid filling bag 24 of the inner disc 21 is larger than the preset pressure; the pressure-sensitive stop pin device comprises a telescopic pin 261, a stop pin 262 and a fourth elastic unit 263, wherein the telescopic pin 261 is arranged along the inner disc 21 in a sliding manner in the radial direction, and the outer end of the telescopic pin 261 protrudes to the outside of the outer ring surface of the inner disc 21 and presses the liquid-filled sac 24; the fourth elastic unit 263 is located at the inner end of the telescopic pin 261 for pushing the telescopic pin 261 outwards, the stop pin 262 is arranged to protrude along the radial direction of the telescopic pin 261, and the stop pin 262 protrudes to the side where the outer disc 22 is located and is stopped with the end of the transmission rod 256; when the liquid-filled bag 24 on the inner disc 21 reaches the preset pressure, the retractable pins 261 are compressed inward and the stop pins 262 are disengaged from the end of the transmission rod 256.

Further, a rigid pipeline 28 for the steel strand 40 to pass through is further arranged between the inner disc 21 and the outer disc 22, and on one hand, the rigid pipeline 28 can isolate the steel strand 40 from concrete slurry to prevent the concrete slurry from blocking the steel strand 40 from being tensioned, and on the other hand, the rigid pipeline can play a role of a reinforcing rib to improve the structural strength of the hole sealing device 20; the central hole of the rigid pipeline 28 is arranged by penetrating through the disc surfaces of the inner disc 21 and the outer disc 22; an exhaust hole 201 is formed in the end face, opposite to the outer disc 22, of the inner disc 21, the exhaust hole 201 is communicated with the lower end of the central column 113 through the radial direction of the inner disc 21 and the axial direction of the central column 113, and the exhaust hole 201 can prevent positive pressure generated inside the hole sealing device 20 during grouting from affecting grouting efficiency; annular grooves on the outer annular surfaces of the inner disc 21 and the outer disc 22, and the liquid filling sac 24 is embedded in the annular grooves; the retractable pin 261 is disposed at the far end of the liquid inlet end of the liquid filling bag 24 on the inner disc 21.

Further, the push rod conveying mechanism is mounted on a swing bracket 34, the swing bracket 34 is hinged on a sliding bracket 35 along a horizontal axis, the sliding bracket 35 is mounted on a sliding block of a first sliding rail 36, the first sliding rail 36 is mounted on a sliding block of a second sliding rail 37, the first sliding rail 36 and the second sliding rail 37 are perpendicular to each other and both arranged horizontally, and the second sliding rail 37 is fixed on a working table frame 38; the check mechanism 33 comprises a shell 331 and two wedge-shaped clamping blocks 332, a trapezoidal inner cavity is arranged in the shell 331, the two wedge-shaped clamping blocks 332 are arranged, the inclined surfaces of the two wedge-shaped clamping blocks 332 are in sliding fit with the inclined walls of the trapezoidal inner cavity, two opposite side walls of the two wedge-shaped clamping blocks 332 are parallel straight walls, and arc-shaped grooves with the radian consistent with that of the face of the push rod 31 are arranged on the straight walls; the non-return mechanism 33 further comprises a lifting block 333, the lifting block 333 is movably arranged in the shell 331 along a direction parallel to the axis of the push rod 31, the lifting block 333 is in blocking connection with the bottom surfaces of the two wedge-shaped clamping blocks 332, the lower end of the lifting block 333 protrudes out of the shell 331, when the lifting block 333 is lifted, the inclined surfaces of the two wedge-shaped clamping blocks 332 can be separated from the inclined wall of the inner cavity of the shell 331, and at the moment, the push rod 31 can be conveniently pulled out downwards after the anchor 10 is fixed in place.

Preferably, at least two groups of conveying roller pairs 32 are arranged along the axial direction of the push rod 31, and the swing bracket 34 is provided with a driving motor for driving at least one group of conveying roller pairs 32 to rotate; the push rod 31 is of a hollow tubular structure, and a convex shaft which is in insertion fit with the push rod 31 is arranged at the outer end of the anchor 10; the push rod 31 is of a detachable multi-section structure; the push rods 31 of all the sections are connected through threads; and the first slide rail 36 and the second slide rail 37 are both provided with a screw rod and nut mechanism for driving the slide seat to slide along respective rails, and a screw rod of the screw rod and nut mechanism is provided with a hand wheel.

Example 2

A method for reinforcing a tunnel vault by using the reinforced construction system comprises the following steps:

step 1: a plurality of anchor holes distributed in a radial shape are formed along the normal direction of the arch crown cambered surface of the tunnel;

step 2: connecting the steel strands 40 to the anchorage device 10, and pushing the anchorage device 10 and the hole sealing device 20 to the inner end of the anchor hole by using the anchorage device pushing device 30; and step 3: the push rod 31 of the pushing device is pulled out of the anchor hole, and the anchor 10 and the hole sealing device 20 stay at the inner end of the anchor hole under the support of the re-expansion block 12;

and 4, step 4: the grouting pipeline 27 is utilized to fill concrete grout into the hole sealing device 20, the concrete grout firstly fills the liquid filling bags 24 on the inner disc 21 and the outer disc 22 to isolate the space between the inner disc 21 and the outer disc 22 from the spaces at the two ends of the hole sealing device 20, and then the grout fills the space between the inner disc 21 and the outer disc 22 to enable the hole sealing device 20 to be tightly combined with the inner wall of the anchor hole;

and 5: after the concrete grout in the hole sealing device 20 is forced, installing the orifice anchor 10, firstly arranging an anchor seat at the orifice of the anchor hole, arranging an anchor head at the outer end of the anchor seat, penetrating the steel strand 40 through a conical hole in the anchor head, arranging a hydraulic cylinder at the outer end of the anchor head, fixing the steel strand 40 on a pushing head of the hydraulic cylinder, tensioning the steel strand 40 by using the hydraulic cylinder, installing a conical clamping piece in the conical hole of the anchor head, finally dismantling the hydraulic cylinder, and finishing the installation of a single anchor cable;

step 6: and (5) repeating the steps 2 to 5, and sequentially installing the anchor cables in the anchor holes until all the anchor cables in all the anchor holes are installed, and finishing construction.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be construed as the protection scope of the present invention. Structures, devices, and methods of operation not specifically described or illustrated herein are generally practiced in the art without specific recitation or limitation.

Claims

1. A deep hole anchor fixing device is characterized in that: the hole sealing device comprises an anchor and a hole sealing device, wherein the anchor comprises an anchor body, an expansion block movably arranged along the radial direction and a driving block used for driving the expansion block to expand outwards along the radial direction are arranged on the anchor body, a first elastic unit is arranged between the driving block and the anchor body, and the first elastic unit is assembled to enable the elastic force of the first elastic unit to drive the driving block to drive the expansion block to expand outwards along the radial direction; the locking mechanism is assembled to prevent the driving block from driving the expansion block to expand outwards along the radial direction when the locking mechanism is in a locking state, and the unlocking mechanism is assembled to be extruded by the inner end face of the anchor hole and trigger the locking mechanism to unlock when the anchor body reaches the inner end of the anchor hole; the hole sealing device comprises an inner disc, an outer disc and a central shaft for connecting the inner disc and the outer disc, annular liquid filling bags are arranged on the outer ring surfaces of the inner disc and the outer disc, the liquid filling bags on the inner disc and the outer disc are communicated with each other, a liquid filling valve is arranged on the outer disc and comprises a liquid inlet, a first liquid outlet and a second liquid outlet, the liquid inlet is communicated with a grouting pipeline, the first liquid outlet is communicated with the liquid filling bags on the outer disc, the second liquid outlet is communicated with an annular space between the inner disc and the outer disc, and the liquid filling valve is assembled to be capable of being switched between the following two stations: a first station, wherein a liquid inlet is communicated with a first liquid outlet; the liquid inlet is communicated with the second liquid outlet; the hole sealing device is positioned at the outer end of the anchorage device, and the inner disc is abutted against the outer end face of the anchorage device.

2. The deep hole anchor fixing device of claim 1, wherein: at least two expansion blocks are symmetrically arranged along the circumferential direction of the anchor body; the driving block is movably arranged along the axial direction of the anchor body, the expansion block is provided with a wedge surface, the driving block is provided with a wedge driving surface matched with the wedge surface, the elastic force of the first elastic unit acts on the driving block along the axial direction of the anchor body, and the assembling direction of the wedge surface and the wedge driving surface is set to be capable of driving the expansion block to expand outwards along the radial direction of the anchor body when the driving block slides towards the outer side of the anchor hole; and the driving block is provided with a cable hole for connecting a steel strand.

3. The deep hole anchor fixing device of claim 3, wherein: the locking mechanism comprises a first end face adjacent to the wedge face and a second end face adjacent to the wedge driving face, the first end face and the second end face are perpendicular to the axial direction of the anchor device body, and the locking mechanism is in a locking state when the first end face and the second end face are in blocking connection and are mutually abutted under the action of the first elastic unit; when the expansion block slides outwards along the anchor body in the radial direction for a preset distance, the first end face can be separated from the second end face, the wedge face and the wedge driving face are mutually abutted under the action of the first elastic unit, and at the moment, the locking mechanism is in an unlocking state.

4. The deep hole anchor fixing device of claim 4, wherein: the unlocking mechanism is assembled to drive the driving block in the locking state to slide outwards along the radial direction of the anchor body for the preset distance when the unlocking mechanism is extruded by the inner end face of the anchor hole; the unlocking mechanism comprises a push block which is movably arranged along the axial direction of the anchor device body, an inclined plane matched with the wedge surface is arranged on the push block, a push rod is connected to the push block and is arranged in parallel to the axial direction of the anchor device body, and the push rod extends to the outer side of the top end of the anchor device body in a protruding mode and extends towards the inner end face of the anchor hole in a protruding mode.

5. The deep hole anchor fixing device of claim 6, wherein: a second elastic unit is arranged between the ejector rod or the push block and the anchorage device body, and the second elastic unit is assembled to enable the elastic force of the second elastic unit to drive the ejector rod and the push block to protrude towards the top of the anchorage device body; one end of the ejector rod, which protrudes to the outside of the anchorage device body, is connected with a push plate; the anchor device body is radially provided with a T-shaped sliding groove, and the expansion block is provided with a T-shaped block in sliding fit with the T-shaped sliding groove; one side of the expansion block facing the inner wall of the anchor hole is an arc surface, and a convex nail is arranged on the arc surface.

6. The deep hole anchor fixing device of claim 8, wherein: the anchor device body comprises a first disc body and a second disc body, wherein the axes of the first disc body and the second disc body are arranged at intervals, and the first disc body and the second disc body are connected into a whole through a center column; the driving block and the expansion block are axially distributed between the first disc body and the second disc body along the central column, the expansion block is arranged on the first disc body in a sliding mode, the driving block is close to the second disc body, and the first elastic unit is a pressure spring arranged between the second disc body and the driving block; the ejector rod is arranged on the second disc body in a sliding manner; the second elastic unit is a pressure spring arranged between the push plate and the end face of the second disc body.

7. The deep hole anchor fixing device of claim 1, wherein: still include forced induction actuating mechanism, forced induction actuating mechanism is assembled to be in when the pressure in the liquid filling bag does not reach preset pressure the prefill valve is in station one, and when the pressure in the liquid filling bag reaches preset pressure forced induction actuating mechanism drive prefill valve switch to station two.

8. The deep hole anchor fixing device of claim 2, wherein: the liquid filling valve comprises a valve shell and a valve core, a cylindrical inner cavity is arranged in the valve shell, the liquid inlet, the first liquid outlet and the second liquid outlet are communicated with the cylindrical inner cavity, the first liquid outlet and the second liquid outlet are respectively positioned at two sides of the liquid inlet, the valve core is arranged in the cylindrical inner cavity in a sliding mode, an annular groove is formed in the outer annular surface of the valve core, the annular groove is positioned between the liquid inlet and the first liquid outlet when the liquid filling valve is positioned at a station I, and the annular groove is positioned between the liquid inlet and the second liquid outlet when the liquid filling valve is positioned at; the valve core is provided with a transmission rod which is convexly extended towards one side of the inner disc, the transmission rod is extended to the outside of the valve shell, a third elastic unit is arranged between the transmission rod and the valve shell, and the third elastic unit is assembled to enable the elastic force of the third elastic unit to drive the valve core to slide from the station to the station II; the pressure-sensitive stop pin device is arranged on the inner disc and is abutted against the transmission rod to prevent the transmission rod from sliding to the second station under the action of the third elastic unit when the pressure of the liquid filling bag of the inner disc is smaller than the preset pressure, and the pressure-sensitive stop pin device can avoid the transmission rod to enable the transmission rod to drive the valve core to switch to the second station under the action of the third elastic unit when the pressure of the liquid filling bag of the inner disc is larger than the preset pressure.

9. The deep hole anchor fixing device of claim 4, wherein: the pressure-sensitive stop pin device comprises a telescopic pin, a stop pin and a fourth elastic unit, the telescopic pin is arranged along the radial direction of the inner disc in a sliding manner, and the outer end of the telescopic pin protrudes to the outside of the outer ring surface of the inner disc and extrudes the liquid filling sac; the fourth elastic unit is positioned at the inner end of the telescopic pin and used for pushing the telescopic pin outwards, the stop pin is arranged in a protruding mode along the radial direction of the telescopic pin, and the stop pin protrudes out of one side where the outer disc is positioned and is in blocking connection with the end portion of the transmission rod; when the liquid filling bag on the inner disc reaches the preset pressure, the telescopic pin is compressed inwards, and the stop pin is separated from the end of the transmission rod at the moment.

10. The deep hole anchor fixing device of claim 5, wherein: a rigid pipeline for the steel strand to pass through is further arranged between the inner disc and the outer disc, and a central hole of the rigid pipeline penetrates through the disc surfaces of the inner disc and the outer disc; an exhaust hole is formed in the end face, opposite to the outer disc, of one side of the inner disc, and the exhaust hole is communicated to the lower end of the central column through the radial direction of the inner disc and the axial direction of the central column; the liquid filling bags are embedded in the annular grooves; the telescopic pin is arranged at the far end of the liquid inlet end of the liquid filling bag on the inner disc.