CN217632512U - Anchor rod construction pit groove reservation device and support - Google Patents

Abstract

The utility model provides a device is reserved in stock construction pit groove and is strutted, and the device is reserved in stock construction pit groove includes main body mould, side mould and spring pull rod bolt, and the main body mould is provided with dismantlement portion on the end wall of first direction, and the main body mould is provided with the spout along first direction with running through. The two side dies are oppositely arranged along the second direction and enclose into a containing groove, the main body die is arranged in the containing groove, the side dies are penetratingly provided with first fixing holes along the first direction, and fixing pieces are arranged in the first fixing holes. Spring pull rod bolt installs in the spout, and spring pull rod bolt includes bolt main part, spring and card, and the stiff end of bolt main part passes behind the spout with side mould fixed connection, and spring and card are all established on the bolt main part, and the both ends of spring are fixed respectively and are close to fixed end department at card and bolt main part, card and spout sliding fit and with the spacing cooperation of the diapire of spout. The device realizes that the surface of the primary support of the whole tunnel is smooth without the quality hidden trouble of later-stage water prevention and drainage.

Description

Anchor rod construction pit groove reservation device and support

Technical Field

The utility model belongs to the technical field of the tunnel construction technique and specifically relates to a stock construction pit slot reservation device and strut is related to.

Background

In the construction of tunnel engineering, aiming at the construction stages of broken surrounding rocks and weak surrounding rocks, in order to reduce the risk that the anchor rod constructed immediately after primary spraying will cause block falling caused by multiple disturbances of loose surrounding rocks and simultaneously shorten the working procedure time for enclosing the surrounding rocks as much as possible, the anchor rod of the tunnel in the current stage mostly adopts the methods of primary supporting a steel frame and constructing the anchor rod after the concrete spraying construction is finished.

As shown in fig. 1 and 2, in the prior art, a manual air drill or a machine (a drill jumbo, a bolt drilling machine) or the like is adopted to directly drill a hole on the surface of the concrete layer 11 sprayed at the primary support of the tunnel, the drilled hole penetrates through the primary support steel arch 111 and extends into the surrounding rocks 112, and then the anchor rod 12, the grout stop plug 13, the anchor backing plate 14, the bolt 15 and the like are installed and grouting operation is performed. The anchor rod leakage part 10 of the anchor rod 12 leaking out of the concrete layer 11 comprises an anchor backing plate 14, a bolt 15 and a tail part 121 of the anchor rod 12, the total length of the anchor rod leakage part 10 is more than about 10cm, and before the construction water-proof measures (such as paving and hanging geotextile 16, waterproof boards 17 and the like), the anchor rod leakage part 10 is too long and easily pierces through the waterproof layers 16 and 17, so the anchor rod leakage part 10 leaking out of the surface of sprayed concrete must be subjected to measures such as secondary cutting, mortar 181 wrapping and protection cover 182 treatment before the construction water-proof measures. However, according to the existing scheme, the implementation effect is poor, the process is complicated, the operation is laborious, the bulge increases the difficulty in controlling the paving and hanging looseness of the waterproof board 17, and meanwhile, when the concrete layer 19 is poured on the follow-up two linings, the lining thickness t1 cannot meet the design value, so that the bulge has great water leakage hidden danger for the construction quality of later-stage lining water prevention and drainage, and potential safety hazards are left for later-stage operation safety. And the anchor rods 12 constructed by the multi-step construction method are all in the high-altitude operation range, and the like, and the difficulty of processing the leakage parts 10 of the anchor rods is increased.

The existing method is to adopt sprayed concrete to carry out secondary patching and spraying concrete on all leakage areas to cover the leakage areas, and the problems of large secondary patching and spraying concrete amount, large thickness, easy layering, high cost consumption and the like cannot be effectively solved due to the reasons of dense anchor rods, leakage length and the like.

Therefore, the problems caused by the construction process of the anchor rod and the treatment of the leakage part can greatly affect a plurality of processes and quality safety in the later period, the solution in the prior art is not thorough and effective enough, and a new solution is urgently needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an anchor rod construction hole groove reservation device has thoroughly solved the difficult problem that the stock that the anchor rod that leads to of being under construction again after just propping up and spouting the concrete leaks the position outward and handles, ensures that the stock leaks the position whole and handles simply swiftly outward, does not keep the quality hidden danger of later stage waterproof water.

The utility model aims at providing a strut with above-mentioned stock construction pot hole reservation device.

In order to realize the first purpose, the utility model provides a device is reserved in stock construction pot hole, including main phantom, side mould and spring pull rod bolt, the main phantom is provided with dismantlement portion on the end wall of first direction, and the main phantom is provided with the spout along first direction with running through. The quantity of side mould is at least two, and a plurality of side moulds enclose into the storage tank, and wherein two side moulds set up along the second direction relatively, and the main part mould sets up in the storage tank, and the side mould is provided with first fixed orifices along the first direction with running through, is provided with the mounting in the first fixed orifices. Spring pull rod bolt installs in the spout, and spring pull rod bolt includes bolt main part, spring and card, and the stiff end of bolt main part passes behind the spout with side mould fixed connection, and spring and card are all established on the bolt main part, and the both ends of spring are fixed respectively and are close to fixed end department at card and bolt main part, card and spout sliding fit and with the spacing cooperation of the diapire of spout.

By above-mentioned scheme, stock construction hole groove reservation device passes through the spring stay bolt and links together main part mould and side mould fastening, close subsides and form the device that is used for reserving stock construction hole groove, and the device passes through mounting detachably to be fixed on just propping up. After the concrete is sprayed, because the side moulds on both sides of the main body mould are extruded and fastened by the concrete, acting force is applied to the top disassembling part at the center of the main body mould by adopting an auxiliary mechanical tool and the auxiliary mechanical tool is pulled outwards, the deformation of the main body mould and the spring pull rod bolt in the middle can be realized, gaps are generated immediately to cause the side moulds on both sides to be close to each other and separated from the concrete, the spring is in a contraction state under the action of self elastic restoring force, the disassembling and pulling-out operation of the reserved pit slot device is realized easily at last, a pit slot is formed at the position of an installation anchor rod, the head of the anchor rod can be ensured not to leak outwards, and the flatness of the primary support surface is ensured. The whole device is simple and quick in the aspect of pre-embedding operation, the whole device is firm after installation, the installation and dismantling operation of the device is simple, convenient, quick and effective, the device can be repeatedly used, the whole construction cost is greatly reduced, and the effect is extremely obvious. The utility model discloses a stock construction pit slot reservation device thoroughly solves the difficult problem that the stock that just props up again and construct after spouting the concrete and lead to leaks the position processing outside the stock, ensures that the stock leaks the position overall treatment outside and simply swiftly, does not keep the quality hidden danger of later stage waterproof drainage.

After the primary support system is installed, the anchor rod construction pit reserving device is installed at positions such as a steel arch frame and a steel bar mesh through the fixing piece, then, primary support concrete spraying construction can be carried out, after the concrete spraying is finished, during the drilling construction process of the next circulating operation surface, an auxiliary drawing tool is adopted to apply acting force to the disassembling portion, all anchor rod construction pit reserving devices are disassembled, an anchor rod pit is formed at the position where the anchor rod is installed on the primary support concrete layer, then, drilling can be carried out in the anchor rod pit, the anchor rod is installed, and grouting operation is carried out. After the anchor rod is installed, the concrete is sprayed into the anchor rod pit slot in a supplementing mode, so that the pit slot is leveled, the primary supporting surface of the whole tunnel is smooth, and the optimal construction condition is created for later tunnel water-proof and drainage construction.

The side die comprises a side fixing part and a bottom supporting part which are arranged along the second direction, the bottom supporting part is provided with a supporting surface, a second fixing hole opposite to the sliding groove is formed in the supporting surface, and the spring is positioned in the second fixing hole; the main body mould is provided with a matching surface which is perpendicular to the first direction, and the matching surface is parallel to the supporting surface and is attached to the supporting surface.

Therefore, the supporting surface is arranged, so that the main body die can be supported, and meanwhile, the main body die can be well positioned through the limiting matching of the supporting surface and the matching surface along the first direction.

The further scheme is that an internal thread is arranged on the circumferential wall of the bottom end of the second fixing hole, the second fixing hole and the sliding groove are coaxially arranged, and the fixing end of the bolt main body is connected with the internal thread.

Therefore, the main body die and the side die are connected through the matching of the internal threads and the bolt main body.

The further scheme is that the side wall of the accommodating groove inclines towards one end of the dismounting part, the supporting surface is located in the middle of the accommodating groove in the first direction, and the outer wall of the main body model is tightly attached to the side wall of the accommodating groove.

Therefore, the obliquely arranged side wall is convenient for pulling out the anchor rod construction pit reserving device.

Preferably, the side fixing part and the main body mold are arranged along the second direction, the first fixing hole is formed in the side fixing part, the fixing end of the fixing part is provided with a threaded connecting part, and the threaded connecting part extends out of the first fixing hole.

Therefore, the threaded connection part is convenient for realizing the detachable connection between the anchor rod construction pit reserving device and the supporting system.

An preferred scheme is that, stock construction pot hole reservation device still includes long tail nut, and long tail nut includes welding stiff end and the thread connection end of arranging along first direction, thread connection end and mounting threaded connection.

Therefore, the fixation of the whole anchor rod construction pit reserving device is solved by welding and fixing the welding fixed end of the long tail nut and the steel arch or the steel mesh and the like in the primary support system of the tunnel, so that the anchor rod construction pit reserving device is prevented from deforming, falling and being damaged in the primary support concrete spraying process. In addition, the combination of the long tail nut and the long screw rod used as a fixing piece can ensure that the long tail nut does not loosen or fall off under the severe environment of high wind pressure and high impact force of sprayed concrete.

Preferably, the disassembling part is a ring-pull screw, and the main body mold and the side molds are plastic parts.

It follows that the application of force to the body mould using the tool is facilitated.

One preferred scheme is that a sealing plug is further arranged in the sliding groove and is located at one end, far away from the fixed end of the bolt main body, of the sliding groove.

Therefore, the arrangement of the blocking plug can prevent concrete and the like from entering the sliding groove to influence the sliding of the bolt main body in the sliding groove.

For realizing the second purpose, the utility model provides a strut, including support and foretell stock construction hole groove reservation device, stock construction hole groove reservation device detachably installs on the support.

Preferably, the support further comprises a concrete layer formed by spraying concrete on the bracket; anchor rod construction hole groove reservation device is pre-buried in the concrete layer, and the end wall that anchor rod construction hole groove reservation device was provided with the dismantlement portion exposes from the concrete layer.

Therefore, the initially supported concrete layer can form the pit at the position of the anchor rod construction pit reserving device, and the subsequent anchor rod installation is facilitated.

Drawings

Fig. 1 is a schematic view of an overall structure of a conventional anchor rod constructed after primary support construction of a tunnel is completed.

Fig. 2 is a schematic structural view of the anchor rod of fig. 1 after being installed and subjected to waterproof and drainage construction and secondary lining concrete pouring.

Fig. 3 is the structural schematic diagram of the embodiment of the device is reserved in the anchor rod construction pit.

Fig. 4 is the utility model discloses anchor rod construction pot hole reservation device's embodiment structural exploded view.

Fig. 5 is the cross-sectional view of the utility model discloses stock construction pot hole reservation device embodiment.

Fig. 6 is the utility model discloses the construction of stock construction pit slot reservation device in the embodiment spring rod bolt's structural schematic.

Fig. 7 is the state diagram after the utility model discloses anchor rod construction pit groove reservation device embodiment is installed on the steel bow member and just spouts.

Fig. 8 is the utility model discloses anchor rod construction pit groove is reserved device embodiment dismantles the schematic diagram of long screw rod.

Fig. 9 is the state diagram of the main body mould and the side mould separated after the main body mould is outwards pulled by the anchor rod construction pit slot reserving device.

Fig. 10 is the state diagram that the side mould outwards moves along with the main body mould under the effect of the elastic restoring force of the spring after the embodiment of the anchor rod construction pit groove reserving device of the utility model outwards pulls the main body mould.

Fig. 11 is the application the utility model discloses anchor rod construction pit slot is reserved device embodiment and is formed the anchor rod construction pit slot back supporting schematic structure in the tunnel.

Fig. 12 is a schematic structural view of the in-tunnel support after concrete is applied to the anchor rod construction pit of fig. 11.

Fig. 13 is a schematic view showing a structure of a support in a tunnel after waterproof and drainage construction and secondary lining concrete pouring are performed on the foundation of fig. 12.

The present invention will be further explained with reference to the drawings and examples.

Detailed Description

Referring to fig. 3 to 5, the anchor rod construction pit reserving device 3 of the present embodiment includes a mold assembly, four spring stay bolts 6, three long screws 7 as fixing members, and three long tail nuts 8. The mould assembly is substantially cuboid and consists of a substantially T-shaped main mould 4 and two substantially L-shaped side moulds 5. The main body mold 4 and the side mold 5 are plastic members, and a tab screw 41 serving as a detachable portion is provided on an end wall of the main body mold 4 in a first direction (direction indicated by an arrow X).

The two side molds 5 are arranged oppositely along the second direction Y at a certain distance, a containing groove 50 is formed by the two side molds 5 in a surrounding mode, the main body mold 4 is arranged in the containing groove 50, the pull ring screw 41 is located at the first opening end 501 of the containing groove 50, and the main body mold 4 is fixedly connected with the side molds 5 through the spring pull rod bolt 6. The side die 5 is provided with a first fixing hole 53 penetrating in the first direction X, and the long screw 7 is installed in the first fixing hole 53. Each lug nut 8 includes a welded fixed end 81 and a threaded end 82 arranged along the first direction X, the fixed end of the long screw 7 is provided with a threaded connection portion 71, and the threaded connection portion 71 is threaded with the threaded end 82 of the lug nut 8 after protruding from the first fixing hole 53. The fixing of the anchor rod construction pit reserving device 3 is realized by fixedly welding the welding fixed end 81 of the long tail nut 8 with a steel arch 91 (shown in fig. 11) or a reinforcing mesh and the like in the primary support of the tunnel, and meanwhile, the anchor rod construction pit reserving device 3 is ensured not to be deformed, dropped and damaged in the primary support concrete spraying process. In addition, the long tail nuts 8 are correspondingly matched and connected with the long screw rods 7 one by one, so that the looseness and falling of the sprayed concrete in severe environments with high wind pressure and high impact force can be avoided. The length of the longtail nut 8 can be lengthened according to the field situation.

The main body mold 4 is provided with four sliding grooves 42 arranged in a matrix in a penetrating manner along the first direction X, the spring pull rod bolts 6 are installed in the corresponding sliding grooves 42 in a one-to-one manner, as shown in fig. 6, each spring pull rod bolt 6 comprises a bolt main body 61, a spring 62 and a clamping piece 63, the fixed end 611 of each bolt main body 61 penetrates through the corresponding sliding groove 42 and then is fixedly connected with the side mold 5, the springs 62 and the clamping pieces 63 are all sleeved on the bolt main bodies 61, two ends of the springs 62 are respectively fixed at positions, close to the fixed ends 611, of the clamping pieces 63 and the bolt main bodies 61, the fixed ends 611, used for the bolt main bodies 61, are arranged on the bottom wall of the sliding grooves 42 and penetrate through holes 421, the outer diameter of each clamping piece 63 is larger than the diameter of the through holes 421 and smaller than the diameter of the sliding grooves 42, and therefore sliding fit between the clamping pieces 63 and the bottom walls of the sliding grooves 42 is achieved. The bolt head 64 of the bolt body 61 is provided with an inner hexagonal screw hole 641, which is convenient for the constructor to disassemble with tools. Each sliding groove 42 is provided with a blocking plug 40 made of rubber material, the blocking plug 40 is positioned at one end of the sliding groove 42 far away from the fixed end 611 of the bolt main body 61, and the blocking plug 40 can prevent concrete and the like from entering the sliding groove 42 and influencing the sliding of the bolt main body 61 in the sliding groove 42.

The side die 5 comprises a side fixing part 51 and a bottom end supporting part 52 which are arranged along the second direction Y, the side fixing part 51 and the main die 4 are arranged along the second direction Y, the first fixing holes 53 are located on the side fixing part 51, one of the side dies 5 is provided with one first fixing hole 53, the other side die is provided with two first fixing holes 53, and the three first fixing holes 53 are arranged in a triangular shape. The first end wall 512 of the side fixing portion 51 in the first direction X is smoothly and transitionally connected with the end wall 44 of the pull ring screw 41 on the main body form 4 to form the front end wall 31 of the anchor construction pit reserving device 3, the front end wall 31 is located at the opening 210 of the anchor construction pit 21 (shown in fig. 11), the front end wall 31 is in an arc shape slightly bending outwards in the first direction X, the second end wall 513 of one end of the side form 5 in the first direction X is smoothly transitionally connected with the end wall 45 of the main body form 4 far away from the pull ring screw 41 to form the rear end wall 32 of the anchor construction pit reserving device 3, the rear end wall 32 is in an arc shape bending away from the pull ring screw 41 in the first direction X, the side wall 514 of the side fixing portion 51 far away from the accommodating groove 50 is slightly inclined away from the pull ring screw 41, the upper end wall 34 and the lower end wall 35 of the anchor construction pit reserving device 3 oppositely arranged in the third direction Z are also inclined towards the direction far away from the pull ring screw 41, therefore, the side wall 34, the side wall and the side wall 35 and the side wall 514 of the pull ring screw 32 between the front end wall 31 and the pull ring screw 32 are also inclined towards the inner peripheral wall of the side wall of the anchor construction pit reserving device 3, and the inner peripheral wall of the side wall 21 is inclined towards the side wall 21, and the side wall of the anchor construction pit 21 is formed by the side wall 21, and the anchor construction pit is quickly inclined towards the side wall 21, and the inner wall 32, and the anchor construction pit is formed by the side wall 21, and the anchor construction pit wall 21 is quickly separated from the opening 21.

The bottom end support portion 52 is provided with a support surface 521, a second fixing hole 522 which is opposite to the sliding groove 42 and coaxially arranged is arranged on the support surface 521, the sliding groove 42 and the second fixing hole 522 jointly form a bolt mounting hole for accommodating the spring stay bolt 6, and the spring 62 is located in the second fixing hole 522. The main body mold 4 is provided with a mating surface 43 perpendicular to the first direction X, and the mating surface 43 is parallel to the supporting surface 521 and is closely attached to the supporting surface 521 under the tensile force of the spring 62. The peripheral wall of the bottom end of the second fixing hole 522 is provided with an internal thread 523, and after the bolt main body 61 passes through the through hole 421 and extends into the second fixing hole 522, the fixed end 611 of the bolt main body 61 is connected with the internal thread 523.

The sidewall 502 of the receiving groove 50 is inclined toward one end of the tab screw 41, the sidewall 502 of the receiving groove 50 includes a first inclined surface 511 on the side fixing portion 51 and a second inclined surface 524 on the bottom end supporting portion 52, the first inclined surface 511 and the second inclined surface 524 are arranged along the first direction X and are connected by a supporting surface 521, such that the supporting surface 521 is located at the middle of the receiving groove 50 in the first direction X. The first inclined surface 511 and the second inclined surface 524 are both inclined toward the first open end 501 of the receiving groove 50, and the outer wall of the main body mold 4 is closely attached to the side wall 502 of the receiving groove 50.

Referring to fig. 10 and 11, the support of the present embodiment is a primary support, i.e., a primary support. The support includes steel bow member 91, longitudinal tie bar 92, the reinforcing bar net piece, concrete layer 2 and anchor rod construction pit groove reservation device 3, steel bow member 91 and reinforcing bar net piece are all installed on the country rock 93 in tunnel, two adjacent steel bow members 91 along longitudinal arrangement are through longitudinal tie bar 92 welded fastening, steel bow member 91, longitudinal tie bar 92, the reinforcing bar net piece forms the support, anchor rod construction pit groove reservation device 3 detachably installs on the support, concrete layer 2 is through spraying concrete formation on steel bow member 91 and reinforcing bar net piece, anchor rod construction pit groove reservation device 3 is pre-buried in concrete layer 2, be used for forming the pit groove 21 that is used for installing the anchor rod on concrete layer 2, anchor rod construction pit groove reservation device 3 is provided with the end wall 44 that pull ring screw 41 exposes from concrete layer 2, and the outer surface of concrete layer 2 is provided with the end wall 44 of pull ring screw 41 on the main part mould 4 and is nearly parallel and level.

Referring to fig. 7 to 13, the method for constructing using the anchor construction pit reserving device 3 of the present embodiment includes the following steps.

Firstly, after tunnel excavation and initial spraying, immediately installing a steel arch 91, a longitudinal connecting rib 92 and the like of initial support, immediately installing an anchor rod construction pit reserving device 3 at the positions of the steel arch 91, a reinforcing mesh and the like according to the requirement of annular arrangement of anchor rods at longitudinal intervals after the initial support is installed, wherein the distance between the end wall of the anchor rod construction pit reserving device 3, which is provided with a pull ring screw 41, and the surface of the steel arch 91 is about 6 cm to 9 cm, as shown in fig. 7, the welding fixed end 81 of a long tail nut 8 is welded on the steel arch 91, the reinforcing mesh and the like, so that the anchor rod construction pit reserving device 3 is firmly and reliably fixed on the initial support. During the installation, because the pulling force effect of spring 62, can make main part mould 4 and the inseparable laminating of side mould 5 to make the inseparable connection of main part mould 4 and two side moulds 5 form overall structure together.

And then, after all the anchor rod construction pit reserving devices 3 are installed and fixed, the construction of primary support concrete spraying can be carried out, a concrete layer 2 is formed on the steel arch 91, the technical requirements and quality control of the construction process are strictly operated according to the specifications, the concrete spraying thickness and the concrete spraying time need to be controlled as much as possible in the process, and the later-stage use influence caused by over-thickness, long-time impact and the like is avoided.

And then, after the concrete spraying is finished, during the drilling construction process of the next cycle working face, the anchor rod construction pit reserving device 3 is completely removed by adopting an auxiliary drawing tool. The specific dismantling steps comprise: first, as shown in fig. 8, the head of the long screw 7 is rotated in the reverse direction by a tool, and the long screw 7 is pulled out after the long screw 7 is loosened from the long tail nut 8. Next, as shown in fig. 9, a tool is used to apply an acting force F to the pull ring screw 41 and pull the main body mold 4 outward, the main body mold 4 moves along the first direction X in a direction away from the side mold 5, due to the limit fit between the clamping piece 63 and the bottom wall of the sliding groove 42, the clamping piece 63 moves along with the main body mold 4, due to the connection between one end of the spring 62 and the clamping piece 63, the spring 62 is stretched after receiving a pulling force, the elastic connection of the spring 62 can delay the movement of the side mold 5 relative to the main body mold 4, a gap appears between the side mold 5 and the main body mold 4, so that the side molds 5 on both sides approach each other and separate from the concrete, and as shown in fig. 10, due to the elastic restoring force of the spring 62, a pulling force can be applied to the side mold 5, and after the side molds 5 are tightly attached to the main body mold 4, the main body mold 4 is pulled out along the first direction X. After the anchor rod construction pit reserving device 3 is pulled out, the anchor rod construction pit 21 is formed on the primary support concrete layer 2.

Next, after all the anchor rod construction pit reserving devices 3 are removed, as shown in fig. 11, after drilling is performed in the anchor rod construction pit 21 by using a drilling machine, the anchor rod 94, the grout stop plug 95, the anchor backing plate 96 and the bolt 97 are installed and grouting operation is performed, and during drilling, a constructor can directly drill a hole in the center position of the bottom wall of the anchor rod construction pit 21. After the anchor rods 94 are installed, the rear ends of the anchor rods 94 are located in the anchor rod construction pit 21.

Finally, as shown in fig. 12, the shotcrete post-grouting construction process of the anchor rod construction pit 21 is reasonably arranged according to the comprehensive indexes such as the tunneling construction progress and the anchor rod stress state, the shotcrete post-grouting backfilling is performed on the anchor rod construction pit 21, the tail end of the anchor rod 94 is hidden in the concrete backfilling portion 211, so that the surface of the concrete backfilling portion 211 is flush with the surface of the concrete layer 2, the anchor rod construction pit 21 is leveled, the smooth supporting surface of the whole tunnel in the initial stage is realized, no sharp or bulge part exists, and the optimal construction condition is created for the later stage tunnel water-proof and drainage construction (such as paving and hanging of geotextile 98, installing of waterproof boards 99 and the like). Meanwhile, when a concrete layer 90 is poured in the subsequent two linings, the lining thickness t2 meets the design value.

It is from top to bottom seen that anchor rod construction hole groove reservation device passes through the spring pull rod bolt and fastens main part mould and side mould, the close laminating links together and forms the device that is used for reserving anchor rod construction hole groove, and the device passes through long screw rod detachably to be fixed on just supporting. After concrete spraying is finished, because the side dies on the two sides of the main body die are extruded and fastened by concrete, acting force is applied to the pull ring screw on the top end of the center of the main body die by adopting an auxiliary mechanical tool and the pull ring screw is pulled outwards, so that the deformation of the middle main body die and the spring pull rod bolt can be realized, and gaps are generated immediately so that the side dies on the two sides are close to each other and separated from the concrete, the spring is in a contraction state under the action of self elastic recovery force, and finally, the dismantling and pulling-out operation of the reserved pit slot device is easily realized. The whole device is simple and quick in the aspect of pre-embedding operation, the whole device is firm after installation, the installation and dismantling operation of the device is simple, convenient, quick and effective, the device can be repeatedly used, the whole construction cost is greatly reduced, and the effect is extremely obvious.

Furthermore, in the first direction, the outer surface of the concrete may also be located between two end walls of the bolting work pit reservation device in the first direction. The number of long screws and spring tie bolts can be changed as desired. The number of the side dies can also be four, the four side dies are distributed around the main die and are arranged oppositely, and at least one long screw rod is arranged on each side die. The above changes also enable the object of the present invention to be achieved.

Finally, it should be emphasized that the above-described preferred embodiments of the present invention are merely examples of implementations, and are not intended to limit the scope of the present invention, as those skilled in the art will appreciate that various changes and modifications may be made without departing from the spirit and scope of the invention, and it is intended to cover all such modifications, equivalents, and improvements as fall within the true spirit and scope of the invention.

Claims (10)

1. Anchor rod construction pot hole reservation device, its characterized in that includes:

the main body mould is provided with a dismounting part on the end wall in the first direction, and a sliding groove is penetratingly arranged along the first direction;

the side dies are at least two, a plurality of side dies surround to form an accommodating groove, the two side dies are oppositely arranged along a second direction, the main body die is arranged in the accommodating groove, a first fixing hole is penetratingly formed in the side dies along a first direction, and a fixing piece is arranged in the first fixing hole;

spring pull rod bolt, spring pull rod bolt installs in the spout, spring pull rod bolt includes bolt main part, spring and card, the stiff end of bolt main part passes behind the spout with side mould fixed connection, the spring with the card is all established bolt main part is last, the both ends of spring are fixed respectively the card with the bolt main part is close to fixed end department, the card with spout sliding fit and with the diapire spacing cooperation of spout.

2. The anchor rod construction pit reservation device of claim 1, characterized in that:

the side die comprises a side fixing part and a bottom supporting part which are arranged along the second direction, the bottom supporting part is provided with a supporting surface, a second fixing hole opposite to the sliding groove is formed in the supporting surface, and the spring is located in the second fixing hole;

the main body model is provided with a matching surface perpendicular to the first direction, and the matching surface is parallel to the supporting surface and is attached to the supporting surface.

3. The anchor rod construction pit reservation device of claim 2, characterized in that:

the peripheral wall of the bottom end of the second fixing hole is provided with an internal thread, the second fixing hole and the sliding groove are coaxially arranged, and the fixing end of the bolt main body is connected with the internal thread.

4. The anchor rod construction pit reservation device of claim 2, characterized in that:

the side wall of the accommodating groove inclines towards one end of the detaching part, the supporting surface is located in the middle of the accommodating groove in the first direction, and the outer wall of the main body model is tightly attached to the side wall of the accommodating groove.

5. The anchor rod construction pit reserving device of any one of claims 2-4, wherein:

the side fixing part and the main body die are arranged along the second direction, the first fixing hole is formed in the side fixing part, the fixing end of the fixing part is provided with a threaded connecting part, and the threaded connecting part extends out of the first fixing hole.

6. The anchor rod construction pit reserving device of any one of claims 1-4, wherein:

the anchor rod construction pit slot reservation device still includes long tail nut, long tail nut include along welded fastening end and the threaded connection end that the first direction was arranged, the threaded connection end with mounting threaded connection.

7. An anchor rod construction pit reservation device according to any one of claims 1 to 4, characterized in that:

the disassembling part is a pull ring screw, and the main body die and the side dies are plastic parts.

8. An anchor rod construction pit reservation device according to any one of claims 1 to 4, characterized in that:

and a sealing plug is further arranged in the sliding groove and is positioned at one end, far away from the fixed end of the bolt main body, of the sliding groove.

9. Support, characterized in that it comprises a support and an anchor construction pit reservation device according to any of claims 1 to 8, removably mounted on said support.

10. The support of claim 9, wherein:

the support further comprises a concrete layer formed by spraying concrete on the bracket;

the anchor rod construction pit slot reservation device is pre-buried in the concrete layer, the anchor rod construction pit slot reservation device is provided with the end wall of dismantlement portion and follows the concrete layer exposes.

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