CN216238546U

CN216238546U - Anti soil nail that floats convenient to dismantle

Info

Publication number: CN216238546U
Application number: CN202120697266.1U
Authority: CN
Inventors: 陈寒勇; 王利斌; 何万通; 姜恒
Original assignee: China Coal Zhejiang Survey And Design Co ltd
Current assignee: China Coal Zhejiang Survey And Design Co ltd
Priority date: 2021-04-06
Filing date: 2021-04-06
Publication date: 2022-04-08
Anticipated expiration: 2031-04-06

Abstract

The application relates to a conveniently-detached anti-floating soil nail, which comprises a sleeve arranged in a mounting hole, a structural rib arranged in the sleeve, a first connecting assembly arranged at one end of the sleeve far away from a slope surface, a centering support arranged outside the sleeve and cement slurry filled between the sleeve and the mounting hole, wherein one end of the structural rib far away from the slope surface is fixed on the sleeve through the first connecting assembly, and one end of the structural rib extending out of the slope surface is connected with a steel bar net; the structure rib is in sliding fit with the inner wall of the sleeve, and the sleeve and the inner wall of the mounting hole are arranged at intervals. The application has the effect of recycling the construction ribs.

Description

Anti soil nail that floats convenient to dismantle

Technical Field

The application relates to the field of slope supporting structures, in particular to an anti-floating soil nail convenient to disassemble.

Background

The foundation pit support is a retaining, reinforcing and protecting measure adopted for the side wall of the foundation pit and the surrounding environment in order to ensure the safety of the construction of an underground structure and the surrounding environment of the foundation pit. Soil nail support is one of common forms of foundation pit support, and is widely applied at present because the soil nail support is economic and reliable and the construction is rapid and simple.

The existing soil nailing wall, as shown in fig. 3, includes a side slope 11, a structural bar 22 penetrating through the side slope 11, a mounting hole 12 for mounting the structural bar 22, a centering bracket 23 disposed on the structural bar 22, a reinforcing mesh 13 disposed on the slope surface of the side slope 11, cement paste 25 pressure-grouted in the mounting hole 12, and a concrete surface layer 14 disposed on the reinforcing mesh 13, wherein a plurality of mounting holes 12 are uniformly spaced on the side slope 11, one structural bar 22 is disposed in each mounting hole 12, and the centering bracket 23 makes the structural bar 22 located at the center of the mounting hole 12. Grout 25 is injected into the mounting hole 12 and the reinforcing mat 13 is then woven over the slope 11 and the structural bars 22 are secured to the reinforcing mat 13 at the end extending out of the mounting hole 12. A plurality of drain pipes are inserted into the side slopes 11 at intervals, and finally concrete is sprayed to the reinforcing mesh 13 to form a concrete surface layer 14.

In the related art, after the foundation engineering is completed, the structural ribs 22 are not dismantled, the structural ribs 22 cannot be reused, and the inventor thinks that the defect of insufficient resource utilization exists.

SUMMERY OF THE UTILITY MODEL

In order to make the structure muscle can reuse, this application provides an anti soil nail that floats convenient to dismantle.

The application provides a pair of anti soil nail that floats convenient to dismantle adopts following technical scheme:

a conveniently-detachable anti-floating soil nail comprises a sleeve arranged in an installation hole, a structural rib arranged in the sleeve, a first connecting assembly arranged at one end, far away from a slope, of the sleeve, a centering support arranged outside the sleeve and cement slurry filled between the sleeve and the installation hole, wherein one end, far away from the slope, of the structural rib is fixed on the sleeve through the first connecting assembly, and one end, extending out of the slope, of the structural rib is connected with a steel mesh; the structure rib is in sliding fit with the inner wall of the sleeve, and the sleeve and the inner wall of the mounting hole are arranged at intervals.

By adopting the technical scheme, the construction rib is fixed in the sleeve through the first connecting assembly, then the sleeve is arranged in the mounting hole, and the centering support enables the sleeve to be positioned at the center of the mounting hole; when recovery is required, the sleeve and the construction bar are separated, and the construction bar is recovered.

Optionally, first connection assembly includes that threaded connection keeps away from the afterbody external member of domatic one end and sets up in the outside connecting strip of afterbody external member in the structure muscle, the structure muscle is kept away from domatic terminal surface and sleeve and is kept away from domatic terminal surface interval setting.

Through adopting above-mentioned technical scheme, after basic engineering is accomplished, when retrieving the structure muscle, strike the tip of structure muscle with the hammer, make the structure muscle along telescopic length direction motion, until the connecting strip fracture, afterbody external member and sleeve disconnection will construct the muscle again and take out in the sleeve to accomplish and retrieve.

Optionally, a baffle plate for reducing the concrete entering the sleeve is arranged at one end of the sleeve extending out of the slope surface, the baffle plate is sleeved outside the construction rib, and the baffle plate is tightly abutted to the end surface of the sleeve through a bolt; the reinforcing mesh is arranged between the baffle and the slope.

By adopting the technical scheme, the baffle blocks the opening of the sleeve, so that the concrete is prevented from entering the sleeve when being sprayed; after the reinforcing mesh is woven, sleeving the baffle plate on the structural rib, enabling the baffle plate to abut against the reinforcing mesh, positioning the reinforcing mesh between the baffle plate and the slope surface, and spraying concrete to form a concrete surface layer; the force transmitted from the side slope is transmitted to the steel bar net and then transmitted to the construction bars through the baffle plates.

Optionally, one end of the baffle, which is close to the sleeve, is provided with a ring strip, the ring strip is fixed on the baffle, and the ring strip is sleeved outside the sleeve.

Through adopting above-mentioned technical scheme, the ring strip has sheltered from the gap between baffle and the sleeve, reduces the concrete and has entered into the condition in the sleeve from the gap.

Optionally, a head sleeve for preventing concrete from being sprayed onto the construction rib is arranged at one end, extending out of the slope, of the construction rib, the head sleeve is a cylinder, a groove is formed in one end face of the head sleeve, a thread groove is formed in the bottom of the groove, and the thread groove is in threaded fit with the construction rib; the head sleeve is provided with an end face with a groove and abuts against the baffle plate.

Through adopting above-mentioned technical scheme, the head external member makes structure muscle and concrete surface course keep apart, is convenient for follow-up the recovery to the structure muscle.

Optionally, the sleeve is externally provided with a rib for increasing friction between the sleeve and cement slurry.

By adopting the technical scheme, the friction force between the sleeve and the cement paste is increased, so that the biting force between the sleeve and the cement paste is improved.

Optionally, the sleeve includes a plurality of unit section of thick bamboo, every all be equipped with centering support on the outer wall of unit section of thick bamboo, it is adjacent be equipped with second coupling assembling between the unit section of thick bamboo.

Through adopting above-mentioned technical scheme, because the length of soil nail is 0.5 ~ 1.2 times of the foundation ditch degree of depth, the length of soil nail is longer, unitizes the sleeve, is favorable to telescopic transportation and installation.

Optionally, the second connection assembly comprises an inner ring arranged at one end of the unit cylinder and an outer ring arranged at the other end of the unit cylinder, and the outer wall of the inner ring and the inner wall of the outer ring are both provided with threads; the outer ring of the unit cylinder is in threaded connection with the inner ring of the adjacent unit cylinder.

By adopting the technical scheme, the connecting mode is simple and the installation is convenient.

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

1. when the structure rib needs to be recovered, the structure rib is separated from the sleeve, and the structure rib is pulled out to complete the recovery.

Drawings

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

FIG. 2 is an enlarged view of the structure of portion A of FIG. 1;

fig. 3 is a schematic view of the overall structure of a soil nailing wall in the related art.

Description of reference numerals: 11. side slope; 12. mounting holes; 13. a reinforcing mesh; 14. a concrete facing; 2. soil nailing; 21. a sleeve; 211. a cell cartridge; 212. a rib; 22. constructing a rib; 23. centering the bracket; 24. a first connection assembly; 241. a tail kit; 242. a connecting strip; 25. cement slurry; 26. a baffle plate; 27. a ring strip; 28. a head kit; 281. a groove; 282. a thread groove; 29. a second connection assembly; 291. an inner ring; 292. and (4) an outer ring.

Detailed Description

The present application is described in further detail below with reference to figures 1-2.

The embodiment of the application discloses anti soil nail 2 that floats convenient to dismantle. Referring to fig. 1, the soil nail 2 includes a sleeve 21, a structural bar 22 disposed in the sleeve 21, a first connection assembly 24 for fixing one end of the structural bar 22 to a bottom end of the sleeve 21, a centering bracket 23 disposed outside the sleeve 21, and cement slurry 25 disposed outside the sleeve 21. During construction, a mounting hole 12 for placing the sleeve 21 is drilled on the slope surface of the side slope 11, the sectional dimension of the mounting hole 12 is larger than that of the sleeve 21, the sleeve 21 is placed in the mounting hole 12, the support 23 is centered on the sleeve 21 in the mounting hole 12, and cement slurry 25 is injected under pressure between the sleeve 21 and the mounting hole 12. One end of the construction bar 22 extends out of the slope surface of the side slope 11 and is connected with the reinforcing mesh 13, and finally, the concrete is sprayed on the reinforcing mesh 13 to form the concrete surface layer 14.

With reference to fig. 1 and fig. 2, the first connecting assembly 24 includes a tail sleeve 241 sleeved on one end of the structural rib 22 away from the slope surface and a connecting bar 242 fixed outside the tail sleeve 241, and the tail sleeve 241 is in threaded fit with the structural rib 22. One end of the connecting strip 242 is fixed to the outside of the tail sleeve 241, and the other end is fixed to the inside of the sleeve 21. The construction bar 22 is fixed to the sleeve 21 at one end by the tail sleeve 241 and the connecting bar 242, and connected to the mesh reinforcement 13 at the other end, so that the construction bar 22 is under tension. When the construction bar 22 needs to be recovered, the construction bar 22 is struck by a hammer to break the connecting strip 242, the construction bar 22 is disconnected from the sleeve 21, and the construction bar 22 can be drawn out and recovered.

Referring to fig. 1, since the length of the soil nails 2 is 0.5 to 1.2 times of the excavation depth of the foundation pit, the soil nails 2 have a long length and the soil nails 2 need to be unitized. The sleeve 21 comprises a plurality of unit cylinders 211, a second connecting assembly 29 is arranged between the unit cylinders 211, the second connecting assembly 29 comprises an outer ring 292 arranged at one end of each unit cylinder 211 and an inner ring 291 arranged at the other end of each unit cylinder 211, and threads are arranged on the inner wall of the outer ring 292 and the outer wall of the inner ring 291. The outer ring 292 of the unit cylinder 211 is sleeved outside the inner ring 291 of the adjacent unit body and is in threaded fit with the outer ring. The unitization of the sleeve 21 facilitates the installation and transportation of the sleeve 21, and the construction bars 22 may be formed by welding or mechanically connecting a plurality of reinforcing bars. Centering brackets 23 are provided on both sides of the outer wall of each unit cylinder 211.

The terminal surface that is located a unit section of thick bamboo 211 on the slope 11 is domatic flushes with domatic, construction muscle 22 stretches out slope 11 domatic, and be equipped with baffle 26 on the construction muscle 22, baffle 26 cup joints in the outside of constructing muscle 22, one side that construction muscle 22 is located baffle 26 and keeps away from a unit section of thick bamboo 211 is equipped with the bolt with 22 screw-thread fit of construction muscle, the bolt makes baffle 26 butt on a unit section of thick bamboo 211's terminal surface, and baffle 26 is equipped with the ring strip 27 towards a unit section of thick bamboo 211's side, the ring strip 27 is fixed in on the baffle 26, the outside in a unit section of thick bamboo 211 is cup jointed to ring strip 27, thereby it enters into in a unit section of thick bamboo 211 to reduce the concrete.

In order to reduce the amount of concrete sprayed onto the structural ribs 22, so that the end portions of the structural ribs 22 are connected and fixed with the bolts and the baffle 26, a head sleeve 28 is arranged at one end of the structural rib 22 away from the unit cylinder 211, a groove 281 is formed in the end surface of the head sleeve 28 facing the baffle 26, a thread groove 282 is formed in the bottom of the groove 281, the head sleeve 28 is in threaded connection with one end of the structural rib 22 away from the unit cylinder 211, and the end surface of the head sleeve facing the baffle 26 abuts against the baffle 26. The headpiece 28 may be made of low cost plastic, and the headpiece 28 may be broken by direct knocking when the structural ribs 22 need to be retrieved.

The reinforcing mesh 13 is directly woven between the baffle 26 and the slope surface of the side slope 11, and the force transmitted from the slope surface of the side slope 11 is transmitted to the baffle 26 through the reinforcing mesh 13 and then transmitted to the construction ribs 22 through the baffle 26.

The unit cylinder 211 is provided with ribs 212 on the outside thereof to increase the frictional force between the unit cylinder 211 and the cement paste 25, thereby increasing the biting force between the unit cylinder 211 and the cement paste 25.

The implementation principle of the embodiment of the application is as follows: during construction, a mounting hole 12 is drilled on the slope surface of the side slope 11, the construction ribs 22 are firstly connected to the tail sleeve 241 in the unit cylinder 211 at the lowest end in a threaded mode, then one part of the unit cylinder 211 is placed into the mounting hole 12, then one unit cylinder 211 is connected with the unit cylinder 211 in the mounting hole 12 in a threaded mode, the operation is repeated until the unit cylinders 211 are completely installed, and cement slurry 25 is injected between the unit cylinders 211 and the mounting hole 12 under pressure. After the cement slurry 25 is hardened, the reinforcing mesh 13 is woven on the slope surface of the side slope 11, the end parts of the construction ribs 22 are sleeved with the baffle plates 26 and fixed through bolts, so that the reinforcing mesh 13 is positioned between the baffle plates 26 and the slope surface, then the head sleeve 28 is sleeved and connected in a threaded mode, and finally concrete is sprayed to form the concrete surface layer 14.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides an anti soil nail that floats convenient to dismantle which characterized in that: the steel bar net structure comprises a sleeve (21) arranged in a mounting hole (12), a structural bar (22) arranged in the sleeve (21), a first connecting assembly (24) arranged at one end, far away from a slope, of the sleeve (21), a centering support (23) arranged outside the sleeve (21) and cement paste (25) filled between the sleeve (21) and the mounting hole (12), wherein one end, far away from the slope, of the structural bar (22) is fixed on the sleeve (21) through the first connecting assembly (24), and one end, extending out of the slope, of the structural bar (22) is connected with a steel bar net (13); the structure ribs (22) are in sliding fit with the inner wall of the sleeve (21), and the sleeve (21) and the inner wall of the mounting hole (12) are arranged at intervals.

2. The easy-to-detach anti-floating soil nail as claimed in claim 1, wherein: first connecting elements (24) include tail external member (241) that slope surface one end was kept away from in structure muscle (22) and set up in the outside connecting strip (242) of tail external member (241), structure muscle (22) are kept away from domatic terminal surface and sleeve (21) and are kept away from domatic terminal surface interval setting.

3. The easy-to-detach anti-floating soil nail according to claim 2, wherein: one end of the sleeve (21) extending out of the slope surface is provided with a baffle (26) for reducing concrete entering the sleeve (21), the baffle (26) is sleeved outside the construction rib (22), and the baffle (26) is tightly propped against the end surface of the sleeve (21) through a bolt; the reinforcing mesh (13) is arranged between the baffle (26) and the slope.

4. The easy-to-detach anti-floating soil nail as claimed in claim 3, wherein: one end of the baffle (26) close to the sleeve (21) is provided with a ring strip (27), the ring strip (27) is fixed on the baffle (26), and the ring strip (27) is sleeved outside the sleeve (21).

5. The easy-to-detach anti-floating soil nail according to claim 4, wherein: a head sleeve (28) used for preventing concrete from being sprayed onto the construction rib (22) is arranged at one end, extending out of the slope, of the construction rib (22), the head sleeve (28) is a cylinder, a groove (281) is formed in one end face of the head sleeve (28), a thread groove (282) is formed in the bottom of the groove (281), and the thread groove (282) is in threaded fit with the construction rib (22); the end face of the head sleeve (28) provided with the groove (281) is abutted against the baffle plate (26).

6. The easy-to-detach anti-floating soil nail as claimed in claim 1, wherein: the outer part of the sleeve (21) is provided with a rib (212) for increasing the friction force between the sleeve (21) and cement slurry (25).

7. The easy-to-detach anti-floating soil nail as claimed in claim 1, wherein: the sleeve (21) comprises a plurality of unit cylinders (211), a centering support (23) is arranged on the outer wall of each unit cylinder (211), and a second connecting assembly (29) is arranged between every two adjacent unit cylinders (211).

8. The easy-to-detach anti-floating soil nail according to claim 7, wherein: the second connecting assembly (29) comprises an inner ring (291) arranged at one end of the unit cylinder (211) and an outer ring (292) arranged at the other end of the unit cylinder (211), and both the outer wall of the inner ring (291) and the inner wall of the outer ring (292) are provided with threads; the outer ring (292) of the unit cylinder (211) is in threaded connection with the inner ring (291) of the adjacent unit cylinder (211).