CN221001035U

CN221001035U - Prefabricated reinforced concrete screw thread soil nail

Info

Publication number: CN221001035U
Application number: CN202322575112.7U
Authority: CN
Inventors: 秦杏春; 姚泽文; 张兴; 黄杰; 严锫铖
Original assignee: Shaanxi Construction Engineering Infrastructure Group Co ltd
Current assignee: Shaanxi Construction Engineering Infrastructure Group Co ltd
Priority date: 2023-09-21
Filing date: 2023-09-21
Publication date: 2024-05-24
Anticipated expiration: 2033-09-21

Abstract

The application relates to a prefabricated reinforced concrete screw thread soil nail, which relates to the technical field of building construction and comprises a plurality of sleeves, a drill bit and reinforcing steel bars, wherein the sleeves are sequentially distributed along the axis direction of the reinforcing steel bars and are in threaded connection with the reinforcing steel bars, the drill bit is fixedly connected with the sleeves coaxially, a thread groove is coaxially arranged in an inner cavity of each sleeve, and the reinforcing steel bars are fixedly connected with the drill bit after penetrating through the sleeves; the outer wall of the sleeve is provided with a thread-shaped screw thread, and the screw thread is fixedly connected with the sleeve in a coaxial way. The application has the effects of enabling the connection between the soil nails and the wall body to be more stable and further providing more stable supporting effect for the foundation pit.

Description

Prefabricated reinforced concrete screw thread soil nail

Technical Field

The application relates to the technical field of building construction, in particular to a prefabricated reinforced concrete screw-thread soil nail.

Background

In the building construction process, a foundation is usually required to be excavated, and meanwhile, a certain slope is required to be supported by adopting a certain slope supporting technology, so that the slope keeps a certain strength, and meanwhile, a stable support is provided for related operation in a foundation pit, so that the foundation pit can safely work. In the related structure of the side slope support, the soil nailing wall is a novel soil retaining structure which is gradually developed in recent years, the application range is gradually increased, and the soil nailing wall is used for more projects

In the related art, the conventional soil nails used for the soil nail wall are usually formed by drilling soil nail holes in advance, then placing the soil nails in the inner cavities of the nail holes, arranging through holes in the hollow side walls of the soil nails, and grouting the inner cavities of the soil nails after the soil nails are positioned in the holes, and contacting with a foundation pit after passing through the through holes, so that the soil nails are fixed on the side walls of the foundation pit.

Aiming at the related technology, the needed procedures are more, the single construction procedure is longer, delay is caused to a certain extent, and meanwhile, when grouting operation is performed, the condition that grouting is not full possibly exists between the through holes and the wall body, so that the connection stability between soil nails and the wall body is affected.

Disclosure of utility model

In order to enable connection between the soil nail and the wall body to be more stable and further provide a more stable supporting effect for the foundation pit, the application provides the prefabricated reinforced concrete threaded soil nail.

The application provides a prefabricated reinforced concrete screw-thread soil nail, which adopts the following technical scheme:

the utility model provides a prefabricated reinforced concrete screw thread soil nail, includes sleeve, drill bit and reinforcing bar, the sleeve is equipped with a plurality ofly, a plurality of the sleeve is arranged in proper order along the reinforcing bar axis direction and all with reinforcing bar threaded connection, the drill bit with sleeve coaxial fixed connection, telescopic inner chamber coaxial is equipped with the screw thread groove, the reinforcing bar wear to locate behind the sleeve with drill bit fixed connection;

The outer wall of the sleeve is provided with a thread-shaped screw thread, and the screw thread is fixedly connected with the sleeve in a coaxial way.

Through adopting above-mentioned technical scheme, when being fixed in the lateral wall of foundation ditch with the soil nail, operating personnel at first according to the length of reinforcing bar, with the sleeve of suitable quantity through threaded connection's mode with the reinforcing bar be connected, aim at the relevant position of foundation ditch with the drill bit afterwards, rotate the reinforcing bar afterwards, the reinforcing bar drives the drill bit rotatory, and then drives the sleeve rotation, and the screw thread of sleeve department can cut soil this moment, and then prevents that the soil nail from droing from the inside of foundation ditch under the exogenic action, influences the connection stability between soil nail and the foundation ditch. Through this scheme, can realize through the screw thread that soil nail is fixed in foundation ditch department, can prevent effectively that soil nail from following the hole slippage, avoid concrete placement simultaneously, improve work efficiency.

Optionally, a thread-shaped guide piece is arranged on the surface of the drill bit.

Through adopting above-mentioned technical scheme, the surface of drill bit is equipped with spiral and changes the guide piece, can increase the area of contact of drill bit and foundation ditch at the in-process of drill bit and foundation ditch contact, and then makes the inner chamber at the foundation ditch that the drill bit can be faster remove, and then drives the sleeve and enter into the inner chamber of foundation ditch, accomplishes the reinforcement operation to the foundation ditch.

Optionally, a slice is provided at one end of the screw adjacent to the drill bit, and the thickness of the slice gradually decreases from the direction close to the screw to the direction far away from the screw.

Through adopting above-mentioned technical scheme, the one end that the section is close to the screw tooth is unanimous with the thickness of screw tooth, and the other end is the pointed end setting, at the in-process of screw tooth and the soil contact of foundation ditch department, the section can play the effect of breaking the earth, and then makes the screw tooth can enter into the gap department that the section breaks, improves the speed of advancing of screw tooth in soil, improves operating personnel's work efficiency.

Optionally, the plurality of sleeves include adjacent first sleeve and second sleeve, be close to in the first sleeve the terminal surface of second sleeve is provided with the grafting piece, be close to in the second sleeve the terminal surface of first sleeve is provided with the grafting groove, the grafting groove is used for holding the grafting piece.

Through adopting above-mentioned technical scheme, operating personnel is when the location to two adjacent telescopic, and operating personnel rotates the sleeve, and when two sleeves were close to gradually, the spliced block received the extrusion this moment with another telescopic terminal surface contact, and to installing telescopic inner chamber slip that is equipped with the spliced block, when the spliced block just to the jack groove, the spliced block lost telescopic extrusion this moment, and the spliced block pops out to enter into the jack groove, accomplish the circumference location between two sleeves.

Optionally, a connecting component is arranged between two adjacent sleeves, the connecting component comprises two positioning blocks, the sleeves are all provided with positioning grooves, each positioning groove is used for accommodating one positioning block, two positioning blocks are fixedly connected, each positioning block is provided with a jackscrew, and the jackscrews sequentially penetrate through the positioning blocks and the sleeves and are in threaded connection with the positioning blocks and the sleeves.

Through adopting above-mentioned technical scheme, operating personnel is being connected two adjacent sleeves and is made, makes two locating pieces be located two constant head tanks respectively, and then is connected fixedly to each sleeve and locating piece through the jackscrew, can accomplish the axial positioning between two adjacent sleeves, and then prevents to take off between two sleeves.

Optionally, the telescopic outer wall is equipped with a plurality of mounting grooves, is equipped with the grafting subassembly in the mounting groove, the grafting subassembly includes the grafting piece, grafting piece one end with the sleeve rotates to be connected, the grafting piece towards the terminal surface of telescopic inner chamber is equipped with the spring, spring one end with grafting piece fixed connection, the other end with telescopic inner chamber fixed connection.

Through adopting above-mentioned technical scheme, the mounting groove provides installation space for the installation of grafting subassembly, and in the rotatory in-process of sleeve in the foundation ditch, soil extrusion grafting piece, grafting piece extrusion spring this moment makes the sleeve can be smooth rotatory in soil. When soil nails have a tendency of being pulled out from soil, the inserting pieces reversely rotate and are inserted into the soil, the springs extend to the longest distance, and then the inserting pieces are prevented from excessively rotating, and the limiting effect is reduced.

Optionally, a blocking plate is arranged on the end surface, which is far away from the sleeve of the drill bit and is not in contact with the adjacent sleeve, and the blocking plate is sleeved on the reinforcing steel bar and is fixedly connected with the sleeve;

The baffle plate is provided with an annular groove, the inner cavity of the annular groove is provided with a sliding block, the sliding block can slide along the annular groove, the sliding block is provided with two supporting plates, one supporting plate is rotationally connected with the sliding block, the other supporting plate is rotationally connected with the supporting plate, the end faces, close to each other, of the two supporting plates are sunken to form a clamping gap in the direction away from each other, and the clamping gap is used for accommodating a reinforcing steel bar frame.

Through adopting above-mentioned technical scheme, the baffle provides the erection bracing for the setting of annular, and the slider slides along the annular, can drive the backup pad and slide along the annular, and two backup pads are formed with the centre gripping clearance, can drive the centre gripping clearance and slide along the annular, and the backup pad rotates with the slider to be connected for the centre gripping clearance is adjustable for the angle of baffle, and then carries out the centre gripping spacing to the reinforcing bar frame of different angles.

Optionally, the inner chamber equipartition in centre gripping clearance has a plurality of elastic rods, elastic rod one end with backup pad fixed connection, the other end are equipped with the butt board, and with butt board fixed connection.

Through adopting above-mentioned technical scheme, operating personnel rotate two backup pads to make clamping gap and external environment intercommunication, place the steel reinforcement frame in clamping gap this moment, and with two backup pads closure, make clamping gap and external environment disconnection. The steel bar frame contacts and extrudes the abutting plate, and the abutting plate extrudes the elastic rod at the moment, so that the limiting effect on the steel bar frame is improved.

In summary, the present application includes at least one of the following beneficial technical effects:

1. By arranging the sleeve, the drill bit and the steel bar frame, the device has the advantages that drilling and deslagging are not needed; the grouting is not needed, the on-site stirring of cement is not needed, and the safety civilization degree is high; the construction machine can be installed at one time, the construction mechanization degree is high, the efficiency is high, and the construction period is saved;

2. By arranging the plug-in assembly, the anti-pulling bearing capacity is high, and the safety stability of foundation pit support can be improved;

3. through setting up the barrier plate, the backup pad of being convenient for is spacing and connect through carrying out the reinforcing bar frame.

Drawings

FIG. 1 is a schematic view of the overall structure of an embodiment of the present application;

FIG. 2 is a schematic cross-sectional view of a connection assembly;

FIG. 3 is a schematic view of a drill bit;

fig. 4 is a schematic view of a blocking plate structure.

Reference numerals: 1. a sleeve; 11. screw threads; 111. slicing; 12. a plug block; 13. a connection assembly; 131. a connecting rod; 132. a positioning block; 133. a jackscrew; 14. a plug assembly; 141. a plug-in piece; 142. a rotating shaft; 143. a spring; 2. a drill bit; 21. a guide piece; 3. a blocking plate; 31. a ring groove; 32. a support plate; 321. a clamping gap; 33. an elastic rod; 34. an abutting plate; 35. an elastic pad; 4. reinforcing steel bars.

Detailed Description

The application is described in further detail below with reference to fig. 1-4.

The embodiment of the application discloses a prefabricated reinforced concrete screw-thread soil nail.

Referring to fig. 1 and 2, a precast reinforced concrete screw includes a sleeve 1, a drill bit 2, a blocking plate 3, and a reinforcing bar 4.

Referring to fig. 1 and 3, in the present embodiment, the sleeve 1 is preferably a hollow cylindrical cylinder, and a plurality of sleeves 1 are provided and coaxially arranged. The outer wall of the sleeve 1 is provided with screw teeth 11, in this embodiment, the cross section of the screw teeth 11 is preferably rectangular, the screw teeth 11 are arranged along the axial direction of the sleeve 1 in a threaded manner, the screw teeth 11 are fixedly connected with the sleeve 1 coaxially in a welding manner, and the rotation directions of the screw teeth 11 of each sleeve 1 are all in the same direction. The one end that keeps away from the entrance to a cave of screw thread 11 is equipped with section 111, and in this embodiment, the shape of section 111 prefers isosceles triangle, and section 111 passes through welded mode and screw thread 11 fixed connection, and the both sides wall of section 111 is laminated and smooth transitional coupling with the both sides wall of screw thread 11 respectively.

Referring to fig. 1 and 2, one end of the sleeve 1 is provided with a plugging groove, an inner cavity of the plugging groove is provided with a plugging block 12, and the plugging block 12 is connected with the sleeve 1 in a sliding way through an elastic piece; the sleeve 1 is kept away from the one end of grafting piece 12 and is equipped with the jack groove, and the quantity of jack groove is four, and along sleeve 1's axis circumference equipartition. Each for receiving one of the plug blocks 12.

Referring to fig. 1, 2 and 3, the end that two sleeves 1 are close to each other is equipped with a plurality of coupling assembling 13, coupling assembling 13 is along sleeve 1's axis direction circumference equipartition, coupling assembling 13 includes connecting rod 131 and two locating pieces 132, two locating pieces 132 are located the both ends of connecting rod 131 respectively, and locating piece 132 is through welded mode and connecting rod 131 fixed connection, sleeve 1 is close to each other one end is equipped with the constant head tank in the lateral wall, every constant head tank can hold a locating piece 132, every locating piece 132 department all is equipped with jackscrew 133, jackscrew 133 and locating piece 132 threaded connection, and pass locating piece 132 and sleeve 1 threaded connection.

Referring to fig. 1 and 2, the drill bit 2 is located at one end of the sleeve 1 away from the hole, in this embodiment, the drill bit 2 is preferably a cone, and the large end of the drill bit 2 is fixedly connected with the sleeve 1 coaxially by welding. The outer wall of the drill bit 2 is provided with a guide piece 21, and the guide piece 21 is arranged in a threaded manner and is fixedly connected with the drill bit 2 in a coaxial manner in a welding manner. Wherein the end of the guide piece 21 far away from the sleeve 1 is provided with a blade.

Referring to fig. 1 and 2, the sleeve 1 is provided with a plurality of mounting slots along the length direction of the screw 11 at intervals, the inner cavity of each mounting slot is provided with a plug assembly 14, the plug assembly 14 comprises a plug piece 141, a rotating shaft 142 and a spring 143, the rotating shaft 142 is fixedly connected with the sleeve 1 in a screw fixing manner, the rotating axis of the rotating shaft 142 is perpendicular to the screw 11, the plug piece 141 is fixedly connected with the rotating end of the rotating shaft 142 in a screw fixing manner, the plug piece 141 inclines towards the opening along the screw direction of the screw 11, one end of the spring 143 is fixedly connected with the plug piece 141 in a welding manner, and the other end of the spring 143 is fixedly connected with the sleeve 1. In this embodiment, the tab 141 is perpendicular to the sleeve 1 when the spring 143 is extended to the longest position.

Referring to fig. 1, 3 and 4, the blocking plate 3 is installed at one sleeve 1 closest to the hole, in this embodiment, the blocking plate 3 is preferably a circular plate, the blocking plate 3 is coaxially arranged with the sleeve 1, the outer diameter is identical to the outer diameter of the sleeve 1, the sleeve 1 is fixedly connected with the blocking plate 3 by a bolt fixing manner, one end of the blocking plate 3 far away from the sleeve 1 is coaxially provided with a ring groove 31, in this embodiment, the ring groove 31 is preferably a T-shaped groove, the inner cavity of the ring groove 31 is provided with a plurality of sliding blocks, and the sliding blocks can slide along the ring groove 31. Each slider department all is equipped with locking subassembly, and locking subassembly includes two backup pads 32, and in this embodiment, the backup pad 32 that is close to the slider is rotated with the slider through the bearing and is connected, and axis of rotation is on a parallel with the axis direction of sleeve 1, and another backup pad 32 one end is rotated with this backup pad 32 through the hinge and is connected, and the other end passes through the retaining member and is connected with this backup pad 32 can dismantle.

Referring to fig. 1, 3 and 4, the end surfaces of the two support plates 32, which are close to each other, are symmetrically recessed in a direction away from each other to form a clamping gap 321, in this embodiment, the shape of the clamping gap 321 is preferably circular, a plurality of abutting components are disposed at the position of the clamping gap 321, the abutting components are circumferentially uniformly distributed along the axial direction of the clamping gap 321, the abutting components include an elastic rod 33 and an abutting plate 34, the length direction of the elastic rod 33 points to the axial direction of the clamping gap 321, one end of the elastic rod is fixedly connected with the support plate 32 in a screw fixing manner, the other end of the elastic rod is fixedly connected with the abutting plate 34 in a screw fixing manner, an elastic pad 35 is disposed at one end of the abutting plate 34, which is far from the elastic rod 33, and the elastic pad 35 is fixedly connected with the abutting plate 34 in a screw fixing manner.

Referring to fig. 1 and 2, the through shaft of the inner cavity of the sleeve 1 is provided with a thread groove, and the thread grooves of the inner cavities of two adjacent sleeves 1 are communicated.

Referring to the figure, the steel bar 4 is coaxially arranged with the sleeve 1, the outer wall of the steel bar 4 is provided with a thread section, the steel bar 4 sequentially penetrates through the inner cavities of the baffle plate 3 and the plurality of sleeves 1 and is in threaded connection with the sleeve 1, and the steel bar 4 is coaxially and fixedly connected with the drill bit 2 in a screw fixing mode.

The implementation principle of the prefabricated reinforced concrete screw thread soil nail provided by the embodiment of the application is as follows: the operator first sleeves a proper number of sleeves 1 at the reinforcing bars 4 according to the required length of the soil nails.

In the process of installing the sleeve 1, the plug block 12 is located in the plug groove, so that two adjacent sleeves 1 can be circumferentially fixed, then two positioning blocks 132 are inserted into the positioning grooves and fixed at the sleeve 1 through jackscrews 133, and further axial fixation between the two adjacent sleeves is achieved.

The operating personnel drives the drill bit 2 and the sleeve 1 to rotate through rotating the reinforcing steel bar 4, the guide piece 21 improves the efficiency of drilling soil by the drill bit 2, the sleeve 1 is driven to advance along the foundation pit, the screw teeth 11 and the plug pieces 141 can improve the connection strength of the sleeve 1 and the foundation pit, and the sleeve 1 is prevented from slipping from the foundation pit.

The operator rotates the support plates 32 along the striker plate, and then changes the opening direction of the clamping gap 321, then rotates the two support plates 32, and makes the reinforcement frame located in the clamping gap 321, and simultaneously the reinforcement frame extrudes the abutting plate 34 and the elastic rod 33, thereby improving the limiting effect on the reinforcement frame.

The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.

Claims

1. A precast reinforced concrete screw-thread soil nail which is characterized in that: the steel bar cutting device comprises a plurality of sleeves, a drill bit and steel bars, wherein the sleeves are sequentially arranged along the axis direction of the steel bars and are in threaded connection with the steel bars, the drill bit is fixedly connected with the sleeves coaxially, a thread groove is coaxially formed in the inner cavity of each sleeve, and the steel bars are fixedly connected with the drill bit after penetrating through the sleeves;

2. A precast reinforced concrete threaded soil nail according to claim 1, characterized in that: the surface of the drill bit is provided with a thread-shaped guide piece.

3. A precast reinforced concrete threaded soil nail according to claim 1, characterized in that: the screw thread is close to the one end of drill bit is equipped with the section, the section is by being close to the screw thread to keep away from the direction thickness taper of screw thread.

4. A precast reinforced concrete threaded soil nail according to claim 1, characterized in that: the plurality of sleeves comprise adjacent first sleeves and second sleeves, plug blocks are arranged on the end faces, close to the second sleeves, of the first sleeves, plug grooves are formed in the end faces, close to the first sleeves, of the second sleeves, and the plug grooves are used for accommodating the plug blocks.

5. A precast reinforced concrete threaded soil nail according to claim 1, characterized in that: the connecting assembly comprises two positioning blocks, wherein each positioning block is used for accommodating one positioning block, two positioning blocks are fixedly connected, each positioning block is provided with a jackscrew, and the jackscrews sequentially penetrate through the positioning blocks and the sleeves and are in threaded connection with the positioning blocks and the sleeves.

6. A precast reinforced concrete threaded soil nail according to claim 1, characterized in that: the outer wall of the sleeve is provided with a plurality of mounting grooves, a plug assembly is arranged in each mounting groove and comprises a plug sheet, one end of each plug sheet is rotationally connected with the sleeve, a spring is arranged on the end face, facing to the inner cavity of the sleeve, of each plug sheet, one end of each spring is fixedly connected with the plug sheet, and the other end of each spring is fixedly connected with the inner cavity of the sleeve.

7. A precast reinforced concrete threaded soil nail according to claim 1, characterized in that: the end face, which is far away from the drill bit and is not in contact with the adjacent sleeve, of the sleeve is provided with a blocking plate, and the blocking plate is sleeved on the steel bar and is fixedly connected with the sleeve;

8. A precast reinforced concrete threaded soil nail according to claim 7, characterized in that: the inner cavity of the clamping gap is uniformly provided with a plurality of elastic rods, one ends of the elastic rods are fixedly connected with the supporting plate, and the other ends of the elastic rods are provided with abutting plates which are fixedly connected with the abutting plates.