CN113774907B - Hollow grouting anchor rod with conical enlarged head and construction method - Google Patents

Abstract

The invention relates to the technical field of anchor bolt support, in particular to a hollow grouting anchor bolt with a conical enlarged head and a construction method, wherein the anchor bolt comprises a sleeve, a plurality of connecting rod assemblies are fixedly connected to the outer wall of the sleeve, a first compression assembly for compressing the connecting rod assemblies is fixedly connected to the middle part of the outer wall of the sleeve, a second compression assembly is clamped at one end of the sleeve, a main rib is connected inside the sleeve in a sliding manner, the main rib is in contact with the second compression assembly, and a pre-tightening assembly is arranged at one end of the main rib far away from the sleeve; the second compresses tightly the subassembly and includes rope portion, compresses tightly first and a plurality of group joint tooth, joint tooth and sleeve pipe outer wall rigid coupling, compresses tightly the first sleeve pipe outer wall of cup joint, compresses tightly the first middle part and has seted up the opening, opening and sleeve pipe outer wall looks adaptation, and the opening lateral wall is provided with the telescopic part, telescopic part and joint tooth joint, rope portion and sleeve pipe outer wall rigid coupling, the main muscle sets up with rope portion contact. The invention can achieve the purpose of tightly combining the anchor rod and the wall of the drilling hole.

Description

Hollow grouting anchor rod with conical enlarged head and construction method

Technical Field

The invention relates to the technical field of anchor rod support, in particular to a hollow grouting anchor rod with a conical enlarged head and a construction method.

Background

The new construction and reconstruction of the expressway often encounters various soft rocks, mudstones and other special soil properties, and the hollow grouting anchor rod technology can keep the integrity and stability of surrounding rocks to the maximum extent, can effectively control the deformation, displacement and crack development of the rock mass, and fully plays the supporting role of the surrounding rocks. Chinese patent CN111005376a discloses a fully assembled pressure-bearing type variable diameter reinforcement cage enlarged head anchor pile system, specifically discloses a system comprising a variable diameter reinforcement cage, a reinforcement connector, an anchor rod member and a limiter limit nut, wherein the limit nut can be of an open or closed type structure, and the variable diameter reinforcement cage is limited on the anchor rod member (limited position) by the limit nut and a bottom plate anchor nut; the anchor rod member adopts finish rolling or common screw thread steel bars, and the steel bar connector is used for the length connection of the end parts of the anchor rod member steel bars; the top of the anchor rod member is anchored with the bottom plate, and the bottom of the anchor rod member is anchored with the enlarged head reinforcement cage, namely the diameter-variable reinforcement cage; the variable-diameter reinforcement cage is provided with a restraining and releasing device, and the concrete or cement mortar crystal part is combined with the variable-diameter reinforcement cage and the axial rod to form a variable-diameter reinforcement cage enlarged head anchor pile system; the utility model provides a diameter-variable reinforcement cage enlarged footing stock stake skeleton system is full assembly type, and the perpendicular muscle of this scheme only contacts with rock soil hole inner wall, has the problem that combines inseparably, and the above-mentioned problem that exists to prior art is directed at, and what need is urgent to take cavity slip casting stock and construction method of toper enlarged footing to solve.

Disclosure of Invention

The invention aims to provide a hollow grouting anchor rod with a conical enlarged head and a construction method thereof, so as to solve the problems and achieve the aim of tightly combining the anchor rod with the wall of a drilling hole.

In order to achieve the above object, the present invention provides the following solutions: the hollow grouting anchor rod with the conical enlarged head comprises a sleeve, wherein a plurality of connecting rod assemblies are fixedly connected to the outer wall of the sleeve, a first compression assembly used for compressing the connecting rod assemblies is fixedly connected to the middle part of the outer wall of the sleeve, a second compression assembly is clamped at one end of the sleeve, a main rib is connected inside the sleeve in a sliding manner, the main rib is in contact with the second compression assembly, and a pre-tightening assembly is arranged at one end, far away from the sleeve, of the main rib;

the second compresses tightly the subassembly and includes rope portion, compresses tightly head and a plurality of group joint tooth, the joint tooth with sleeve pipe outer wall rigid coupling, it cup joints to compress tightly the head the sleeve pipe outer wall, the opening has been seted up at the head middle part that compresses tightly, the opening with sleeve pipe outer wall looks adaptation, the opening lateral wall is provided with the telescopic part, the telescopic part with joint tooth joint, rope portion with sleeve pipe outer wall rigid coupling, the main muscle with rope portion contact sets up.

Preferably, the rope portion comprises a plurality of pulley seats, the pulley seat bottom is fixedly connected with the outer wall of the sleeve, a plurality of pulley seats are arranged at equal intervals along the circumference of the outer wall of the sleeve, the middle part of the pulley seat is rotationally connected with a pulley, the outer wall of the pulley is sleeved with a steel cable, one end of the steel cable is fixedly connected with the bottom of the pressing head, the other end of the steel cable penetrates through the side wall of the sliding plate fixedly connected with the pressing head, and the sliding plate is in contact with the main rib.

Preferably, the outer wall of the main rib is fixedly connected with a fixing plate, the fixing plate is perpendicular to the axis of the main rib, a through hole is formed in the middle of the sliding plate, the main rib is sleeved in the through hole, the fixing plate is located below the sliding plate, and the fixing plate is in contact with the sliding plate.

Preferably, the telescopic part comprises a plurality of groups of pin holes formed in the side wall of the opening, the pin holes correspond to the clamping teeth in position, the inner wall of each pin hole is slidably connected with a pin, the pins are clamped with the clamping teeth, and a second spring is arranged between the bottom of each pin and the bottom of each pin hole in a contact manner.

Preferably, the plurality of link assemblies are arranged at equal intervals along the circumference of the outer wall of the sleeve, the link assemblies comprise two groups of hinge seats, the two groups of hinge seats are arranged at equal intervals along the circumference of the outer wall of the sleeve, one group of hinge seats are fixedly connected with the outer wall of the sleeve, the other group of hinge seats are fixedly connected with the side wall of a second connecting rod, the two groups of hinge seats are rotationally connected with two ends of a plurality of first connecting rods, and the second connecting rod is far away from the side wall of the sleeve and fixedly connected with a plurality of protrusions.

Preferably, the first pressing component comprises a base plate and a pushing plate, the base plate and the pushing plate are located between two adjacent hinging seats of the connecting rod component, the middle part of the base plate is fixedly connected with the sleeve, the base plate is perpendicular to the axis of the sleeve, the pushing plate is slidably connected with the outer wall of the sleeve, the pushing plate is perpendicular to the axis of the sleeve, a first spring is arranged between the base plate and the pushing plate in a contact mode, the outer wall of the sleeve is sleeved with the first spring, a jack is formed in the outer wall of the sleeve, the jack is located below the pushing plate, a plug pin is detachably connected in the jack, the outer wall of the plug pin is contacted with the pushing plate, and a pull rope is fixedly connected with one end of the sleeve away from the plug pin.

Preferably, the pretension assembly comprises a base and a fixing piece, the middle part of the base is sleeved on the main rib, the fixing piece is connected with the end part of the main rib through threads, jacks are symmetrically arranged between the base and the fixing piece, and through grooves are formed in the edge part of the base.

Preferably, a plurality of sliding grooves are formed in the side edges of the pressing head, the sliding grooves correspond to the first connecting rods in position, and the sliding grooves are in contact with the first connecting rods.

Preferably, one end of the sleeve, which is far away from the compression head, is fixedly connected with a conical head, and the tip end of the conical head is far away from the sleeve.

The construction method of the hollow grouting anchor rod with the conical expansion head is suitable for the hollow grouting anchor rod with the conical expansion head, and comprises the following steps of:

drilling holes on the surface of a rock mass;

the grouting pipe passes through the through groove, and an outlet of the grouting pipe is arranged at the lower end of the compaction head;

the hollow grouting anchor rod with the conical expansion head is erected, the conical head faces towards a drilling hole, an operator grabs a main rib, and the hollow grouting anchor rod with the conical expansion head is slowly lowered to the bottom of the drilling hole;

pulling the pull rope to enable the bolt to be separated from the jack, and enabling the connecting rod assembly to be spread under the action of the elastic force of the first spring, wherein the convex part on the second connecting rod is inserted into the wall of the drilling hole;

installing a pre-tightening assembly, manually controlling the jack to extend, and further applying force to the first connecting rod by the compression head, so that the combination of the bulge on the second connecting rod and the wall of the drilling hole is tighter;

and injecting high-pressure mortar into the drilling hole through the grouting pipe until the drilling hole is filled, extracting the grouting pipe, and removing the pre-tightening assembly after the mortar is cured.

The invention has the following technical effects: install the cavity slip casting stock of this application before the rock mass surface drilling that needs the reinforcement of area toper enlarged footing, place the stock of this application in drilling bottom, prop up link assembly through first hold-down assembly, link assembly contacts with the drilling pore wall, link assembly produces certain frictional force with the drilling pore wall, further install pretension subassembly at the main muscle end, stretch the main muscle through pretension subassembly, the main muscle passes through rope portion and drives the clamp head and move down, clamp head and the joint tooth of main muscle cooperate, the clamp head can only follow vertical downward direction unidirectional movement, but not reverse motion, along with the clamp head decurrent removal, the clamp head further presses to link assembly, make link assembly limit portion and the connection of drilling pore wall inseparabler.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

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

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

FIG. 3 is a schematic view of a compression head;

FIG. 4 is a schematic view of a main rib structure;

FIG. 5 is a schematic illustration of a connecting rod assembly;

FIG. 6 is a schematic view of a portion of a first compression assembly;

FIG. 7 is a partial cross-sectional view of the rope portion;

FIG. 8 is a schematic diagram of the structure of embodiment 2;

FIG. 9 is an enlarged view of a portion of FIG. 8 at B;

wherein, 1, the conical head; 2. a sleeve; 3. a hinge base; 4. a first link; 5. a second link; 6. a protrusion; 7. a backing plate; 8. a first spring; 9. a push plate; 10. clamping teeth; 11. a compacting head; 12. a chute; 13. a sliding plate; 14. a main rib; 15. a base; 16. a through groove; 17. a jack; 18. a fixing member; 19. a wire rope; 20. a pulley seat; 21. an opening; 22. a pulley; 23. a pin hole; 24. a pin; 25. a second spring; 26. a fixing plate; 27. a plug pin; 28. a bearing; 29. a plane.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.

Example 1

Referring to fig. 1-7, the embodiment provides a hollow grouting anchor rod with a conical expansion head, which comprises a sleeve 2, wherein a plurality of connecting rod assemblies are fixedly connected to the outer wall of the sleeve 2, a first compression assembly for compressing the connecting rod assemblies is fixedly connected to the middle part of the outer wall of the sleeve 2, a second compression assembly is clamped at one end of the sleeve 2, a main rib 14 is slidably connected to the interior of the sleeve 2, the main rib 14 is in contact with the second compression assembly, and a pre-tightening assembly is arranged at one end, far away from the sleeve 2, of the main rib 14;

the second compresses tightly the subassembly and includes rope portion, compresses tightly first 11 and a plurality of group joint tooth 10, joint tooth 10 and sleeve pipe 2 outer wall rigid coupling, compresses tightly first 11 cup joints at sleeve pipe 2 outer wall, compresses tightly first 11 middle part and has seted up opening 21, opening 21 and sleeve pipe 2 outer wall looks adaptation, opening 21 lateral wall is provided with the telescopic part, telescopic part and joint tooth 10 joint, rope portion and sleeve pipe 2 outer wall rigid coupling, main muscle 14 and rope portion contact setting.

Install the cavity slip casting stock of this application before the rock mass surface drilling that needs the reinforcement of the toper enlarged footing, place the stock of this application in the drilling bottom, prop up link assembly through first hold-down assembly, link assembly contacts with the drilling pore wall, link assembly produces certain frictional force with the drilling pore wall, further install pretension subassembly at the main muscle 14 end, stretch main muscle 14 through pretension subassembly, main muscle 14 passes through rope portion and drives the clamp head 11 and move down, clamp head 11 cooperates with joint tooth 10 of main muscle 14, clamp head 11 can only follow vertical downward direction unidirectional movement, but not reverse motion, move along with clamp head 11 decurrent, clamp head 11 further is exerted pressure to link assembly, make link assembly limit portion and drilling pore wall's connection inseparabler.

Further optimizing scheme, rope portion includes a plurality of pulley holders 20, pulley holder 20 bottom and sleeve pipe 2 outer wall rigid coupling, and a plurality of pulley holders 20 are along sleeve pipe 2 outer wall circumference equidistant setting, and pulley holder 20 middle part rotation is connected with pulley 22, and pulley 22 outer wall has cup jointed cable wire 19, cable wire 19 one end and the rigid coupling of closing head 11 bottom, and cable wire 19 other end passes closing head 11 rigid coupling and has the lateral wall of sliding plate 13, and sliding plate 13 and main muscle 14 contact setting. In the use process, the main rib 14 moves upwards to drive the sliding plate 13 to move upwards, the sliding plate 13 pulls the steel cable 19, and the steel cable 19 pulls the pressing head 11 to move downwards because the position of the pulley 22 is fixed, and the pressing head 11 can press the connecting rod assembly to make contact with the wall of the drilling hole more tightly.

According to the further optimization scheme, the outer wall of the main rib 14 is fixedly connected with a fixing plate 26, the fixing plate 26 is perpendicular to the axis of the main rib 14, a through hole is formed in the middle of the sliding plate 13, the main rib 14 is sleeved in the through hole, the fixing plate 26 is located below the sliding plate 13, and the fixing plate 26 is in contact with the sliding plate 13. The main rib 14 moves upwards to drive the fixing plate 26 to move upwards, the fixing plate 26 drives the sliding plate 13 to move upwards, and the fixing plate 26 on the main rib 14 plays a role in driving the sliding plate 13 to move upwards.

Further optimizing scheme, the telescopic part includes a plurality of groups of pin hole 23 of seting up at opening 21 lateral wall, and a plurality of groups of pin hole 23 are corresponding with joint tooth 10 position, and pin 24 is connected with to pin hole 23 inner wall sliding, and pin 24 and joint tooth 10 joint are provided with second spring 25 in the contact between pin 24 bottom and the pin hole 23 bottom. In the downward movement process of the pressing head 11, the pin 24 is always in contact with the clamping teeth 10 under the action of the elastic force of the second spring 25, and as the clamping teeth 10 are serrated, the pressing head 11 can only move unidirectionally along the clamping teeth 10, and the pin 24 and the clamping teeth 10 cooperate to play a role in preventing the upward movement of the pressing head 11.

Further optimizing scheme, a plurality of link assembly sets up along sleeve pipe 2 outer wall circumference equidistant, and link assembly includes two sets of articulated seat 3, two sets of articulated seat (3) are followed sleeve pipe (2) outer wall circumference equidistant sets up, and articulated seat 3 bottom of a set of and sleeve pipe 2 outer wall rigid coupling, another articulated seat 3 bottom rigid coupling have the lateral wall of second connecting rod 5, rotate between two sets of articulated seats 3 and be connected with the both ends of a plurality of first connecting rods 4, and the lateral wall rigid coupling that sleeve pipe 2 was kept away from to second connecting rod 5 has a plurality of archs 6. When the connecting rod assembly is unfolded, the first connecting rod 4 rotates around the hinging seat 3 on the outer wall of the sleeve 2, the second connecting rod 5 moves horizontally far away from the sleeve 2 around the end parts of the first connecting rods 4, the second connecting rod 5 is always parallel to the sleeve 2, the bulge 6 of the second connecting rod 5 is contacted with the wall of the drilled hole and gradually penetrates into the wall of the hole to form a connection relationship with the wall of the hole, and vertical relative movement between the second connecting rod 5 and the wall of the hole is prevented.

Further optimizing scheme, first hold-down assembly includes backing plate 7 and push pedal 9, backing plate 7 and push pedal 9 are located between two adjacent articulated seat 3 of same link assembly, backing plate 7 middle part and sleeve pipe 2 rigid coupling, backing plate 7 perpendicular sleeve pipe 2 axis, push pedal 9 and sleeve pipe 2 outer wall sliding connection, push pedal 9 perpendicular sleeve pipe 2 axis, the contact is provided with first spring 8 between backing plate 7 and the push pedal 9, first spring 8 cover is established at sleeve pipe 2 outer wall, the jack has been seted up to sleeve pipe 2 outer wall, the jack is located push pedal 9 below, can dismantle in the jack and be connected with bolt 27, bolt 27 outer wall and push pedal 9 contact, bolt 27 keeps away from sleeve pipe 2 one end rigid coupling and has the stay cord (not shown in the figure). The operator pulls the stay cord, and the stay cord drives bolt 27 motion, and after the bolt 27 breaks away from the jack, the elasticity release of first spring 8, and first spring 8 promotes push pedal 9 downward movement, and backing plate 7 is as the support, and push pedal 9 and elastic component's first connecting rod 4 contact to promote first connecting rod 4 to rotate around the articulated seat 3 of sleeve pipe 2 outer wall, thereby link assembly expansion.

Further optimizing scheme, pretension subassembly includes base 15 and mounting 18, and base 15 middle part cup joints on main muscle 14, and mounting 18 passes through threaded connection at main muscle 14 tip, and the symmetry is provided with jack 17 between base 15 and the mounting 18, and the logical groove 16 has been seted up to base 15 limit portion. The base 15 is supported above the drilling opening, after the connecting rod assembly is unfolded, the second connecting rod 5 and the hole wall initially establish a connection relationship, at the moment, the jack 17 is started, the jack 17 lifts the fixing piece 18, the fixing piece 18 drives the main rib 14 to move upwards, the main rib 14 further enables the pressing head 11 to press the first connecting rod 4 through the steel cable 19, and the bonding strength of the second connecting rod 5 and the drilling hole wall is enhanced.

Further optimizing scheme, a plurality of sliding grooves 12 are formed in the side edges of the pressing head 11, the sliding grooves 12 correspond to the first connecting rod 4 in position, and the sliding grooves 12 are in contact with the first connecting rod 4. The pressing head 11 pushes the first connecting rod 4 to move through the sliding groove 12, so that dislocation of the first connecting rod 4 in the moving process is prevented.

Further optimizing scheme, sleeve pipe 2 keeps away from the rigid coupling of closing cap 11 one end has conical head 1, and the pointed end of conical head 1 is kept away from sleeve pipe 2 setting. The conical head 1 is beneficial to the whole device to go deep into a drilling hole, and the conical head 1 plays a guiding role.

The construction method of the hollow grouting anchor rod with the conical expansion head is suitable for the hollow grouting anchor rod with the conical expansion head, takes the supporting project of the side slope from Tian Emei (Qian Gui world) to North sea expressway (Ba Ma Zhi plain fruit segment) as an example, and comprises the following steps:

drilling holes on the surfaces of rock bodies on two sides of the expressway, wherein the hole diameter of the drilled holes is 300mm;

the grouting pipe passes through the through groove 16, the outlet of the grouting pipe is arranged at the 500mm position of the lower end of the pressing head 11, and 1000g of balancing weight is arranged at the outlet of the grouting pipe;

four operators stand up the hollow grouting anchor rod with the conical expansion head, wherein the sleeve 2 is 2m long, the main rib 14 is 7m long, the conical head 1 faces the drill hole, the operators grasp the main rib 14, the hollow grouting anchor rod with the conical expansion head is slowly put down to the bottom of the drill hole, and the tail end of the main rib 14 extends out of the rock wall by 800mm;

an operator pulls the pull rope to enable the bolt 27 to be separated from the jack, the connecting rod assembly is unfolded under the action of the elastic force of the first spring 8, and the bulge 6 on the second connecting rod 5 is partially inserted into the wall of the hole;

the operator passes the base 15 through the main rib 14 to cover the top of the drill hole, screws the fixing piece 18 on the end part of the main rib 14, places two jacks 17 between the base 15 and the fixing piece 18, manually controls the jacks 17 to extend 300mm, and the pressing head 11 further applies force to the first connecting rod 4, so that the bulge 6 on the second connecting rod 5 is combined with the wall of the drill hole more tightly;

and injecting high-pressure mortar into the drill hole through the grouting pipe until the drill hole is filled, extracting the grouting pipe, curing for 15 days, and removing the pre-tightening assembly.

The working procedure of this embodiment is as follows: the whole device is erected, an operator holds the main rib 14 by hand, the whole device is slowly lowered to the bottom of a drilling hole, the conical head 1 plays a guiding role in the lowering process, after the whole device is in place, the operator pulls a pull rope, pulls out the plug 27 from the jack and pulls out the plug 27 to the outside of the drilling hole, after the plug 27 is separated from the jack, the elastic force of the first spring 8 is released, the first spring 8 pushes the push plate 9 to move downwards, the base plate 7 is used as a support, the push plate 9 contacts with the first connecting rod 4 and pushes the first connecting rod 4 to rotate around the hinging seat 3 on the outer wall of the casing 2, the first connecting rod 4 drives the second connecting rod 5 to make translation far away from the casing 2 around the ends of the plurality of first connecting rods 4, the second connecting rod 5 is always parallel to the casing 2, the bulge 6 of the second connecting rod 5 contacts with the wall of the drilling hole and gradually stretches into the wall, and forms a connection relation with the wall, and vertical relative movement between the second connecting rod 5 and the wall is prevented;

the base 15 is covered on the top of a drilling hole through the main rib 14, the fixing piece 18 is screwed on the end part of the main rib 14, the two jacks 17 are placed between the base 15 and the fixing piece 18, the jacks 17 are controlled to extend, the jacks 17 lift the fixing piece 18, the fixing piece 18 drives the main rib 14 to move upwards, the main rib 14 drives the sliding plate 13 to move upwards through the fixing plate 26, the sliding plate 13 pulls the steel cable 19, the steel cable 19 is wound on the pulley 22, the pulley 22 plays a role of a fixed pulley, the other end of the steel cable 19 pulls the pressing head 11 to move downwards, the pin 24 in the pressing head 11 slides downwards on the clamping teeth 10, the pin 24 prevents the pressing head 11 from moving reversely under the action of the elastic force of the second spring 25, and in the downward movement process of the pressing head 11, the first connecting rod 4 is continuously pressed, and the connecting rod assembly is further promoted to be unfolded, so that the second connecting rod 5 is combined with the wall of the drilling hole more tightly;

finally, high-pressure mortar is injected into the drilled hole through the grouting pipe until the drilled hole is filled, the grouting pipe is pulled out, and the pre-tightening assembly is removed after the mortar is cured.

Example 2

Referring to fig. 8-9, the difference between this embodiment and embodiment 1 is that the main rib 14 is in threaded connection with the sleeve 2, the main rib 14 is sleeved with a bearing 28, the bearing 28 is located between the fixed plate 26 and the sliding plate 13, one end of the main rib 14 far away from the sleeve 2 is symmetrically provided with a plane 29, and the bearing 28 is a thrust bearing.

The working process of the embodiment 2 is different from that of the embodiment 1 in that the wrench is used for clamping the plane 29 at the end part of the main rib 14, the wrench is rotated, the main rib 14 rotates along with the plane 29, and the main rib 14 is in threaded connection with the sleeve 2, so that the main rib 14 moves upwards relative to the sleeve 2 in the rotating process, and the cable is driven to move upwards, and the embodiment 2 has the advantages that a pre-tightening assembly is not required to be installed, time and labor are saved, and the operation is convenient.

In the description of the present invention, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

The above embodiments are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solutions of the present invention should fall within the protection scope defined by the claims of the present invention without departing from the design spirit of the present invention.

Claims (6)

1. The utility model provides a take cavity slip casting stock of toper enlarged footing which characterized in that: the novel connecting rod assembly comprises a sleeve (2), wherein a plurality of connecting rod assemblies are fixedly connected to the outer wall of the sleeve (2), a first compression assembly used for compressing the connecting rod assemblies is fixedly connected to the middle of the outer wall of the sleeve (2), a second compression assembly is clamped at one end of the sleeve (2), a main rib (14) is connected to the inside of the sleeve (2) in a sliding manner, the main rib (14) is in contact with the second compression assembly, and a pre-tightening assembly is arranged at one end, far away from the sleeve (2), of the main rib (14);

the second compaction assembly comprises a rope part, a compaction head (11) and a plurality of groups of clamping teeth (10), the clamping teeth (10) are fixedly connected with the outer wall of the sleeve (2), the compaction head (11) is sleeved on the outer wall of the sleeve (2), an opening (21) is formed in the middle of the compaction head (11), the opening (21) is matched with the outer wall of the sleeve (2), a telescopic part is arranged on the side wall of the opening (21), the telescopic part is clamped with the clamping teeth (10), the rope part is fixedly connected with the outer wall of the sleeve (2), and the main rib (14) is in contact with the rope part;

the rope part comprises a plurality of pulley seats (20), the bottoms of the pulley seats (20) are fixedly connected with the outer wall of the sleeve (2), a plurality of pulley seats (20) are circumferentially arranged at equal intervals along the outer wall of the sleeve (2), pulleys (22) are rotationally connected to the middle part of the pulley seats (20), steel ropes (19) are sleeved on the outer wall of the pulleys (22), one ends of the steel ropes (19) are fixedly connected with the bottoms of the pressing heads (11), the other ends of the steel ropes (19) penetrate through the pressing heads (11) and are fixedly connected to the side wall of the sliding plate (13), and the sliding plate (13) is in contact with the main ribs (14);

the outer wall of the main rib (14) is fixedly connected with a fixing plate (26), the fixing plate (26) is perpendicular to the axis of the main rib (14), a through hole is formed in the middle of the sliding plate (13), the main rib (14) is sleeved in the through hole, the fixing plate (26) is located below the sliding plate (13), and the fixing plate (26) is in contact with the sliding plate (13);

the connecting rod assemblies are arranged at equal intervals along the circumferential direction of the outer wall of the sleeve (2), each connecting rod assembly comprises two groups of hinging seats (3), each two groups of hinging seats (3) are arranged at equal intervals along the circumferential direction of the outer wall of the sleeve (2), one group of hinging seats (3) is fixedly connected with the outer wall of the sleeve (2), the other group of hinging seats (3) is fixedly connected with the side wall of a second connecting rod (5), two groups of hinging seats (3) are rotationally connected with two ends of a plurality of first connecting rods (4), and the side wall of the second connecting rod (5) far away from the sleeve (2) is fixedly connected with a plurality of bulges (6);

the first pressing assembly comprises a base plate (7) and a pushing plate (9), the base plate (7) and the pushing plate (9) are located in the same two adjacent hinge bases (3) of the connecting rod assembly, the middle of the base plate (7) is fixedly connected with the sleeve (2), the base plate (7) is perpendicular to the axis of the sleeve (2), the pushing plate (9) is in sliding connection with the outer wall of the sleeve (2), the pushing plate (9) is perpendicular to the axis of the sleeve (2), a first spring (8) is arranged between the base plate (7) and the pushing plate (9) in a contact mode, the first spring (8) is sleeved on the outer wall of the sleeve (2), a jack is formed in the outer wall of the sleeve (2), the jack is located below the pushing plate (9), a plug pin (27) is detachably connected in the jack, the outer wall of the plug pin (27) is in contact with the pushing plate (9), and a pull rope (27) is far away from one end of the sleeve (2) in a fixed connection mode.

2. A hollow grouting anchor with conical enlarged head as claimed in claim 1, wherein: the telescopic part comprises a plurality of groups of pin holes (23) formed in the side wall of the opening (21), the pin holes (23) of the groups correspond to the clamping teeth (10), pins (24) are slidably connected to the inner walls of the pin holes (23), the pins (24) are clamped with the clamping teeth (10), and a second spring (25) is arranged between the bottoms of the pins (24) and the bottoms of the pin holes (23) in a contact mode.

3. A hollow grouting anchor with conical enlarged head as claimed in claim 1, wherein: the pre-tightening assembly comprises a base (15) and a fixing piece (18), wherein the middle part of the base (15) is sleeved on the main rib (14), the fixing piece (18) is connected to the end part of the main rib (14) through threads, jacks (17) are symmetrically arranged between the base (15) and the fixing piece (18), and through grooves (16) are formed in the edge part of the base (15).

4. A hollow grouting anchor with conical enlarged head as claimed in claim 1, wherein: a plurality of sliding grooves (12) are formed in the side edges of the pressing heads (11), the sliding grooves (12) correspond to the first connecting rod (4) in position, and the sliding grooves (12) are in contact with the first connecting rod (4).

5. A hollow grouting anchor with conical enlarged head as claimed in claim 1, wherein: one end of the sleeve (2) far away from the compression head (11) is fixedly connected with a conical head (1), and the tip of the conical head (1) is far away from the sleeve (2).

6. A construction method of a hollow grouting anchor rod with a conical expansion head, which is applicable to the hollow grouting anchor rod with the conical expansion head as claimed in claim 3, and is characterized in that: the method comprises the following steps:

drilling holes on the surface of a rock mass;

the grouting pipe passes through the through groove (16), and the outlet of the grouting pipe is arranged at the lower end of the compaction head (11);

raising a hollow grouting anchor rod with a conical expansion head according to claim 3, enabling the conical head (1) to face a drill hole, enabling an operator to grasp a main rib (14), and slowly lowering the hollow grouting anchor rod with the conical expansion head according to claim 3 to the bottom of the drill hole;

pulling the pull rope to enable the bolt (27) to be separated from the jack, and enabling the connecting rod assembly to be unfolded under the action of the elastic force of the first spring (8), wherein the bulge (6) on the second connecting rod (5) is partially inserted into the wall of the drilling hole;

installing a pre-tightening assembly, manually controlling the jack (17) to extend, and further applying force to the first connecting rod (4) by the pressing head (11), so that the bulge (6) on the second connecting rod (5) is combined with the wall of the drilling hole more tightly;

and injecting high-pressure mortar into the drilling hole through the grouting pipe until the drilling hole is filled, extracting the grouting pipe, and removing the pre-tightening assembly after the mortar is cured.

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