Anchoring device and anchoring method

Abstract

The present invention relates to the field of underground engineering construction, and discloses an anchoring device and an anchoring method. The anchoring device includes an anchor pipe, an expansion pipe, a pressing piece and a limiting piece. The anchor pipe is provided with a grouting hole penetrating the wall thickness direction; the expansion pipe is sleeved on the outer side of the anchor pipe; the pressing piece is used to press down the expansion pipe to expand and deform; the limiting piece is provided on the pressing piece, and when the limiting piece abuts against the top of the anchor pipe, the pressing piece is pressed down into place. The anchoring method includes: S1, lowering the anchor pipe with the expansion pipe sleeved at the bottom into a pre-dug foundation pit; S2, using the pressing piece to press the expansion pipe until the limiting piece on the pressing piece abuts against the top of the anchor pipe, and the expansion pipe is completely expanded and deformed; S3, taking out the pressing piece, and injecting cement slurry into the anchor pipe until the cement slurry fills the anchor pipe and the foundation pit. The expansion pipe is sleeved on the anchor pipe, and the limiting piece is provided to ensure that the pressing piece is pressed down into place, and the expansion pipe is completely expanded and deformed, thereby further improving the anchoring force of the anchor pipe. The entire anchoring operation is simple and the construction efficiency is high.

Description

Technical Field

[0001] The invention relates to the field of underground engineering construction, and in particular to an anchoring device and an anchoring method. Background Art

[0002] During underground construction, anchor pipes are used to control the settlement and large deformation of soil or surrounding rock to ensure construction safety. For the construction of high water level basements or basements with large burial depths, there are problems such as limited anchoring force of anchor pipes and a large number of anchor pipes required, which affects the construction quality and progress. Summary of the invention

[0003] The purpose of the present invention is to provide an anchoring device and an anchoring method, wherein the anchor pipe has a large anchoring force, high construction quality and fast construction speed.

[0004] In order to achieve the above objectives, the following technical solutions are provided:

[0005] In a first aspect, an anchoring device is provided, comprising:

[0006] An anchor pipe, on which a grouting hole is provided that penetrates the wall thickness direction;

[0007] An expansion pipe, sleeved on the outside of the anchor pipe;

[0008] A pressing piece, used for pressing down the expansion tube to expand and deform;

[0009] A limiting member is arranged on the pressing member, and when the limiting member abuts against the top end of the anchor pipe, the pressing member is pressed down into place.

[0010] As a preferred solution of the anchoring device, a plurality of connection holes are provided on the pressing member, and the plurality of connection holes are arranged at intervals along the pressing direction of the pressing member, and the limiting member can be selectively connected to any of the connection holes.

[0011] As a preferred solution of the anchoring device, it also includes a locking piece. After the pressing piece is pressed down into place, the pressing piece and the locking piece are locked on the anchor pipe. The locking piece is detachably connected to the pressing piece and the anchor pipe.

[0012] As a preferred solution of the anchoring device, a lifting hole is provided on the upper portion of the pressing member, and the lifting hole is used to insert a hook of a lifting device to lift the pressing member.

[0013] As a preferred solution of the anchoring device, the pressing member is tubular, and the tubular pressing member can be axially movably sleeved on the anchor pipe.

[0014] As a preferred solution of the anchoring device, a flange is provided at the bottom end of the pressing member, and the flange can press against the top end of the expansion tube.

[0015] As a preferred solution of the anchoring device, an anchoring structure is provided at the bottom end of the anchor pipe, the bottom end of the expansion tube abuts against the anchoring structure, and the anchoring structure can be inserted into the soil layer at the bottom of the foundation pit.

[0016] As a preferred solution of the anchoring device, the anchoring structure is in an inverted cone shape.

[0017] In a second aspect, an anchoring method is provided, using the above-mentioned anchoring device, the anchoring method comprising:

[0018] S1. Lower the expansion pipe and anchor pipe into the foundation pit, and sleeve the expansion pipe on the anchor pipe;

[0019] S2, driving the pressing member to press down the expansion tube until the limiter on the pressing member abuts against the top of the anchor tube, and the expansion tube expands and deforms to abut against the inner wall of the foundation pit;

[0020] S3. Remove the pressing piece and inject cement slurry into the anchor pipe until the cement slurry fills the anchor pipe and the foundation pit.

[0021] As a preferred solution of the anchoring method, after step S2 and before step S3, the method further includes:

[0022] The pressing piece is locked on the anchor pipe by a locking piece. After the pressure is maintained for a preset time, the locking piece is removed to reduce the rebound of the expansion pipe.

[0023] The beneficial effects of the present invention are:

[0024] In the anchoring device provided by the present invention, the anchor pipe with the expansion tube is lowered into the pre-dug foundation pit, the pressing member is used to press the expansion tube downward to expand and deform, and the limiter is arranged on the pressing member. When the limiter abuts against the top of the anchor pipe, it indicates that the pressing member is pressed down in place, ensuring that the expansion tube is fully expanded and deformed. After the deformation of the expansion tube is completed, the pressing member is removed, and cement slurry is poured into the anchor pipe, and part of the cement slurry flows into the space between the anchor pipe and the hole wall of the foundation pit from the grouting hole. When the cement slurry fills the anchor pipe and the space between the anchor pipe and the hole wall of the foundation pit, the anchoring of the anchor pipe is completed. By setting the expansion tube, the anchoring force of the anchor pipe is improved, especially for the construction of high water level basements or basements with large burial depths, the anchor pipe has strong anti-floating and anti-pulling capabilities, and the construction quality is high. At the same time, the number of anchor pipes can be reduced, saving construction costs. By setting the limiter, it is ensured that the pressing member is pressed down in place, thereby ensuring that the expansion tube is fully expanded and deformed. If the pressing member is not pressed down in place, the deformation of the expansion tube is insufficient and the anchoring force of the anchor pipe is insufficient. If the downward pressure of the downward pressure piece is too large, the expansion tube will be deformed too much and fail.

[0025] In the anchoring method provided by the present invention, an expansion tube is sleeved on the anchor tube to improve the anchoring force of the anchor tube, and a limiter is provided on the lower pressing member to ensure that the lower pressing member is pressed down in place, thereby ensuring that the expansion tube is fully expanded and deformed, further improving the anchoring force of the anchor tube. The entire anchoring operation is simple and the construction efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0027] Figure 1 A schematic diagram of the structure of an anchor pipe provided in an embodiment of the present invention;

[0028] Figure 2 A schematic diagram of the structure of an expansion tube (not deformed) provided in an embodiment of the present invention;

[0029] Figure 3 A schematic diagram of the structure of a pressing member provided in an embodiment of the present invention;

[0030] Figure 4 A schematic diagram of the anchoring process provided in an embodiment of the present invention.

[0031] Reference numerals:

[0032] 10-foundation pit; 20-cement slurry;

[0033] 1-anchor pipe; 2-expansion pipe; 3-down-pressing piece; 4-limiting piece;

[0034] 11- grouting hole; 12- anchoring structure;

[0035] 31-connection hole; 32-lifting hole; 33-flange. DETAILED DESCRIPTION

[0036] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0037] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] like Figure 1-Figure 4 As shown, this embodiment provides an anchoring device, including an anchor pipe 1, an expansion pipe 2, a pressing member 3 and a limiting member 4. The anchor pipe 1 is provided with a grouting hole 11 penetrating the wall thickness direction thereof. The expansion pipe 2 is sleeved on the bottom of the anchor pipe 1. The anchor pipe 1 sleeved with the expansion pipe 2 is placed in a pre-dug foundation pit 10. The pressing member 3 is used to press down the expansion pipe 2 to expand and deform. The limiting member 4 is provided on the pressing member 3. When the limiting member 4 abuts against the top of the anchor pipe 1, it indicates that the pressing member 3 is pressed down into place, ensuring that the expansion pipe 2 is fully expanded and deformed. After the deformation of the expansion pipe 2 is completed, the pressing member 3 is removed, and cement slurry 20 is poured into the anchor pipe 1. Part of the cement slurry 20 flows from the grouting hole 11 into the space between the anchor pipe 1 and the hole wall of the foundation pit 10, the inside of the expansion pipe 2, and between the expansion pipe 2 and the inner wall of the foundation pit 10. When the cement slurry 20 fills the anchor pipe 1 and the space between the anchor pipe 1 and the hole wall of the foundation pit 10, the interior of the expansion pipe 2 and the space between the expansion pipe 2 and the inner wall of the foundation pit 10, the anchoring of the anchor pipe 1 is completed.

[0040] By setting the expansion tube 2, the anchoring force of the anchor tube 1 is improved, especially for the construction of high water level basements or basements with greater burial depths. The anchor tube 1 has strong anti-floating and anti-pulling capabilities and high construction quality. At the same time, the number of anchor tubes 1 can be reduced, saving construction costs. By setting the limiter 4, it is ensured that the down-pressing member 3 is pressed down in place, thereby ensuring that the expansion tube 2 is fully expanded and deformed. If the down-pressing member 3 is not pressed down in place, the expansion tube 2 will not be fully deformed and the anchoring force of the anchor tube 1 will be insufficient. If the down-pressing member 3 is pressed down too much, the expansion tube 2 will be deformed too much and fail.

[0041] Exemplarily, a plurality of grouting holes 11 are provided. The plurality of grouting holes 11 are provided in a plurality of rows, the plurality of rows of grouting holes 11 are provided at intervals along the circumference of the anchor pipe 1, the plurality of grouting holes 11 in each row are provided at intervals along the axial direction of the anchor pipe 1, and the grouting holes 11 in adjacent rows are provided at offset positions. The cement slurry 20 injected into the anchor pipe 1 continuously flows downward in the anchor pipe 1, and at the same time, part of the cement slurry 20 flows through the grouting holes 11 to the space between the anchor pipe 1 and the inner wall of the foundation pit 10. By providing a plurality of rows of grouting holes 11 provided at intervals along the circumference of the anchor pipe 1, the cement slurry 20 is uniformly guided to the space between the anchor pipe 1 and the inner wall of the foundation pit 10. The plurality of grouting holes 11 in each row are provided at intervals along the axial direction of the anchor pipe 1, so that the cement slurry 20 can fill the space between the anchor pipe 1 and the inner wall of the foundation pit 10, the interior of the expansion pipe 2, and the space between the expansion pipe 2 and the inner wall of the foundation pit 10 in the axial direction.

[0042] Optionally, the diameter of the grouting holes 11 is 5 mm-10 mm, the spacing between adjacent grouting holes 11 in each row is 250 mm-500 mm, and the distance between the bottommost grouting hole 11 and the bottom end of the anchor pipe 1 is 250 mm-500 mm.

[0043] For example, the grouting hole 11 may be a cylindrical hole. Alternatively, the cross-sectional size of the grouting hole 11 gradually decreases from the inside to the outside along the wall thickness direction of the anchor pipe 1, thereby reducing the resistance of the cement slurry 20 passing through the grouting hole 11 and improving the filling capacity of the cement slurry 20 in the space between the anchor pipe 1 and the inner wall of the foundation pit 10. The grouting hole 11 may be conical.

[0044] Preferably, an anchoring structure 12 is provided at the bottom end of the anchor pipe 1, and the bottom end of the expansion pipe 2 is against the anchoring structure 12. The anchoring structure 12 is inserted into the soil layer at the bottom of the foundation pit 10 to prevent the anchor pipe 1 from shaking in the foundation pit 10 during the process of the down-pressing member 3 pressing down the expansion pipe 2 and the subsequent pouring, thereby ensuring the verticality of the anchor pipe 1. Exemplarily, the anchoring structure 12 is in an inverted cone shape, which facilitates the insertion of the anchoring structure 12 into the soil layer at the bottom of the foundation pit 10. The anchoring structure 12 is also provided with a penetrating grouting hole 11 to improve the connection strength between the anchor pipe 1 and the foundation pit 10.

[0045] Exemplarily, a connection hole 31 is provided on the pressing member 3. The limiting member 4 may be a bare rod, and the connection hole 31 is passed through the limiting member 4. Alternatively, the limiting member 4 is a screw or a bolt, and the limiting member 4 is threadedly connected to the connection hole 31.

[0046] Optionally, a plurality of connecting holes 31 are provided, and the plurality of connecting holes 31 are arranged at intervals along the pressing direction of the pressing member 3. The limiting member 4 can selectively cooperate with any connecting hole 31 to adjust the pressing depth of the pressing member 3 to adapt to anchor pipes 1 of different heights or expansion pipes 2 of different deformation amounts. The pressing member 3 has strong adaptability.

[0047] Optionally, a lifting hole 32 is provided on the upper portion of the pressing member 3. The lifting hole 32 is used to insert a hook of a lifting device to lift the pressing member 3. After the pressure maintenance of the expansion tube 2 is completed, the pressing member 3 can be lifted out of the foundation pit 10 by the lifting device.

[0048] In this embodiment, the pressing member 3 is tubular. The tubular pressing member 3 can be axially movably sleeved on the anchor pipe 1. By setting the pressing member 3 to be tubular, the tubular pressing member 3 is coaxially sleeved on the anchor pipe 1, ensuring that the pressing member 3 applies circumferentially uniform downward pressure to the expansion pipe 2, ensuring that the expansion pipe 2 is uniformly deformed. Of course, in other embodiments, the pressing member 3 can also be a rod or other shape, as long as it can extend into the space between the anchor pipe 1 and the foundation pit 10 to press down the expansion pipe 2.

[0049] Preferably, a flange 33 is provided at the bottom end of the pressing member 3, and the flange 33 presses against the top end of the expansion tube 2 to increase the contact area between the pressing member 3 and the expansion tube 2, promote the deformation of the expansion tube 2, and make the pressing operation of the pressing member 3 more labor-saving.

[0050] Optionally, the anchoring device further includes a locking member. After the pressing member 3 is pressed down into place, the locking member locks the pressing member 3 with the anchor pipe 1 to maintain the pressure on the expansion pipe 2. The locking member is detachably connected to the pressing member 3 and the anchor pipe 1. After maintaining the pressure for a preset time, the locking member is removed and the pressing member 3 is taken out. By maintaining the pressure on the expansion pipe 2 for a preset time, the rebound of the expansion pipe 2 is reduced and the anchoring force of the anchor pipe 1 is ensured. The pressing member 3 can be driven to move up and down repeatedly for multiple times, and after the expansion pipe 2 is completely deformed, the pressing member 3 is locked with the anchor pipe 1 by the locking member.

[0051] Exemplarily, the locking member is a screw or a bolt. A through hole is provided on the pressing member 3, and a threaded hole is provided on the anchor pipe 1. After the locking member passes through the through hole, it is threadedly matched with the threaded hole on the anchor pipe 1 to lock the pressing member 3 with the anchor pipe 1. Alternatively, only a threaded hole is provided on the pressing member 3, and the locking member is threadedly matched with the threaded hole. At the same time, the locking member passes through the threaded hole and abuts against the side wall of the anchor pipe 1 to lock the pressing member 3 with the anchor pipe 1.

[0052] In the anchoring device provided in this embodiment, the anchoring force of the anchor pipe 1 is improved by setting the expansion pipe 2. Especially for the construction of high-water basements or basements with greater burial depths, the anchor pipe 1 has strong anti-floating and anti-pulling capabilities and high construction quality. At the same time, the number of anchor pipes 1 can be reduced to save construction costs. By setting the limiter 4, it is ensured that the down-pressing member 3 is pressed down in place, thereby ensuring that the expansion pipe 2 is fully expanded and deformed. If the down-pressing member 3 is not pressed down in place, the expansion pipe 2 will not be fully deformed and the anchoring force of the anchor pipe 1 will be insufficient. If the down-pressing member 3 is pressed too much, the expansion pipe 2 will be deformed too much and fail.

[0053] See also Figure 4 This embodiment also provides an anchoring method, using the above-mentioned anchoring device, the anchoring method includes:

[0054] S1. Lower the expansion pipe 2 and the anchor pipe 1 into the pre-dug foundation pit 10 , and sleeve the expansion pipe 2 on the anchor pipe 1 .

[0055] When excavating the foundation pit 10, first level the construction site, measure and locate the places where the anchor pipe 1 needs to be set in the foundation pit 10, and mark the drilling positions. Before drilling, adjust the angle of the drilling machine, drill the holes at the places marked by the anchor bolt machine, and start the drilling machine until the predetermined depth is reached. After drilling, clean the hole. After that, lower the anchor pipe 1 into the foundation pit 10. The anchor structure 12 at the bottom of the anchor pipe 1 is inserted into the soil layer at the bottom of the foundation pit 10.

[0056] S2, driving the pressing member 3 to press down the expansion tube 2 until the limiting member 4 on the pressing member 3 abuts against the top end of the anchor tube 1, and the expansion tube 2 expands and deforms to abut against the inner wall of the foundation pit 10.

[0057] The pressing member 3 is locked on the anchor pipe 1 by a locking member. After the expansion pipe 2 is pressurized for a preset time, the locking member is removed to reduce the rebound of the expansion pipe 2.

[0058] S3, take out the pressing member 3, and inject cement slurry 20 into the anchor pipe 1, until the cement slurry 20 fills the anchor pipe 1 and the space between the anchor pipe 1 and the hole wall of the foundation pit 10. The anchoring construction of one anchor pipe 1 is completed.

[0059] In the anchoring method provided in this embodiment, an expansion tube 2 is sleeved on the anchor tube 1 to improve the anchoring force of the anchor tube 1, and a limiter 4 is provided on the pressing member 3 to ensure that the pressing member 3 is pressed down into place, thereby ensuring that the expansion tube 2 is fully expanded and deformed, further improving the anchoring force of the anchor tube 1. The entire anchoring operation is simple and the construction efficiency is high.

[0060] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. An anchoring device, characterized in that: include: An anchor pipe (1) having a grouting hole (11) extending through the wall thickness direction; An expansion tube (2) is sleeved on the outside of the anchor tube (1); A pressing member (3) is used to press down the expansion tube (2) to expand and deform; A limiting member (4) is arranged on the pressing member (3), and when the limiting member (4) abuts against the top end of the anchor pipe (1), the pressing member (3) is pressed down into place; The pressing member (3) is provided with a plurality of connection holes (31), the plurality of connection holes (31) are arranged at intervals along the pressing direction of the pressing member (3), and the limiting member (4) can be selectively connected to any of the connection holes (31).

2. The anchoring device according to claim 1, characterized in that: It also comprises a locking member, and after the pressing member (3) is pressed down into place, the pressing member (3) is locked on the anchor pipe (1) through the locking member, and the locking member is detachably connected to the pressing member (3) and the anchor pipe (1).

3. The anchoring device according to claim 1, characterized in that: The upper portion of the pressing member (3) is provided with a lifting hole (32), and the lifting hole (32) is used to be inserted into a lifting hook of a lifting device so as to lift the pressing member (3).

4. The anchoring device according to claim 1, characterized in that: The pressing member (3) is tubular and can be axially movably sleeved on the anchor pipe (1).

5. The anchoring device according to claim 4, characterized in that: The bottom end of the pressing member (3) is provided with a flange (33), and the flange (33) can press against the top end of the expansion tube (2).

6. The anchoring device according to any one of claims 1 to 5, characterized in that: The bottom end of the anchor pipe (1) is provided with an anchor structure (12), the bottom end of the expansion pipe (2) abuts against the anchor structure (12), and the anchor structure (12) can be inserted into the soil layer at the bottom of the foundation pit (10).

7. The anchoring device according to claim 6, characterized in that: The anchoring structure (12) is in the shape of an inverted cone.

8. An anchoring method, characterized in that: Using the anchoring device according to any one of claims 1 to 7, the anchoring method comprises: S1, lowering the expansion pipe (2) and the anchor pipe (1) into the foundation pit (10), and sleeve-mounting the expansion pipe (2) on the anchor pipe (1); S2, driving the pressing member (3) to press down the expansion tube (2) until the limiting member (4) on the pressing member (3) abuts against the top end of the anchor tube (1), and the expansion tube (2) expands and deforms until it abuts against the inner wall of the foundation pit (10); S3, taking out the pressing member (3), and injecting cement slurry (20) into the anchor pipe (1), until the cement slurry (20) completely fills the anchor pipe (1) and the foundation pit (10).

9. The anchoring method according to claim 8, characterized in that: After step S2 and before step S3, the method further includes: A locking piece is used to lock the pressing piece (3) on the anchor pipe (1); after the pressure is maintained for a preset time, the locking piece is removed to reduce the rebound of the expansion pipe (2).

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