Strong grabbing grouting anchor rod for loose body structure and construction technology

Abstract

The invention discloses a strong grabbing grouting anchor rod for a loose body structure and a construction technology, and relates to the technical field of anchor rods. The strong grabbing grouting anchor rod comprises an anchor rod shell, a grouting pipe, a strong grabbing pipe assembly and a locking mechanism; one end of the anchor rod shell is detachably connected with a rotating hand wheel, the other end of the anchor rod shell is movably connected with a strong grabbing pipe assembly through a locking mechanism, all strong grabbing pipes of the strong grabbing pipe assembly are communicated with the grouting pipe and can be contracted and unfolded through the locking mechanism, and the strong grabbing pipes can be inserted into soil around a drill hole after being unfolded. According to the strong grabbing grouting anchor rod designed by the invention, the problems of non-uniform grouting and large structural stability deviation are solved by adopting a method for increasing the grabbing force by adopting a lateral rigid structure and combining guide pipe grouting, and the problem that a structural layer in the cross section direction of the anchor rod is loose is effectively relieved.

Description

Technical Field

[0001] The invention relates to the technical field of anchor rod grouting anchor rods, in particular to a strong-grab grouting anchor rod for loose body structures and a construction process. Background Art

[0002] The existing types of anchor rods are roughly divided into three categories: pipe-seam anchor rods, self-spinning anchor rods, and self-tapping screw-in anchor rods. The commonly used types of anchor rods on the market cannot achieve a good anchoring effect when performing anchoring construction of loose body structures. In order to ensure the quality of the completed project, the method of anchoring first and then grouting is often used for construction. However, for loose body structures, the disadvantage is that it can only reinforce the soil structure layer along the vertical direction of the anchor rod, and the structural layer in the cross-sectional direction of the anchor rod is still loose. Some structural layers have not been grouted and the strength is unstable. Due to the difficulty in constructing loose body structures, the stability of the structural surface is difficult to reach the safety threshold, which can easily cause a series of phenomena such as collapse and landslides. Based on the above technical problems, there is an urgent need for a strong-grasp grouting anchor rod that is suitable for loose body structures to achieve the stability of its structure. Summary of the invention

[0003] The purpose of the present invention is to provide a strong-grip grouting anchor rod and a construction process for loose body structures, so as to solve the problems existing in the above-mentioned prior art and stabilize the structural layer in the cross-sectional direction of the anchor rod.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] The present invention provides a strong-grab grouting anchor rod for a loose body structure, comprising an anchor rod shell, a grouting pipe, a strong-grab pipe assembly and a locking mechanism. The grouting pipe runs through the anchor rod shell, one end of the anchor rod shell is detachably connected to a rotating hand wheel, and the other end is movably connected to the strong-grab pipe assembly through the locking mechanism. Each strong-grab pipe of the strong-grab pipe assembly is connected to the grouting pipe and can be contracted and expanded through the locking mechanism. After being expanded, the strong-grab pipe can be inserted into the soil around the borehole.

[0006] Preferably, a groove and a pair of slots are provided at the center of the tail end of the anchor rod shell, the grouting pipe passes through the center of the groove, the slots are symmetrically arranged on the end face of the anchor rod shell, and an insert matching the slots is provided on the support rod of the rotating handwheel.

[0007] Preferably, a plurality of positioning brackets are arranged at equal intervals in the hollow cavity of the anchor rod housing, the grouting pipe passes through the center of the positioning bracket, and the grouting pipe and the positioning bracket can slide relative to each other.

[0008] Preferably, the positioning bracket includes three layers of support rods and a circular ring, the upper and lower layers of support are symmetrically arranged about the middle layer, and each layer of support rods is radially distributed in the circumference of the circular ring, the grouting pipe runs through the circular ring, and the angle between the planes of two adjacent layers of support rods is 5°-15°.

[0009] Preferably, the spacing between the positioning brackets is 10 cm-20 cm, and the positioning brackets are welded in the hollow cavity of the anchor rod housing.

[0010] Preferably, the strong grip pipe assembly includes a rigid sleeve and a flexible hose, and a plurality of the flexible hoses are evenly distributed and connected along the circumferential direction on the same cross-section of the grouting pipe. Two sections of the rigid sleeves are arranged on the outer sleeve of each flexible hose, and one end of the two rigid sleeves are connected by a spring to form a V-shaped structure. The rigid sleeve at one end of the V-shaped structure is connected to the side wall of the grouting pipe by a spring, and the other end is locked in the locking mechanism.

[0011] Preferably, the diameter of the flexible hose is 3mm-5mm, and the diameter of each section of the rigid sleeve is 5mm-8mm and the length is 5cm-10cm.

[0012] Preferably, the locking mechanism includes a clamping block, an upper clamping seat, a lower clamping seat and a telescopic layer, a cross-cut is provided at the front end of the anchor rod shell, the upper clamping seat and the lower clamping seat are respectively connected to the outer layers of the anchor rod shell on both sides of the cross-cut, and the inner layers are connected as a whole through the telescopic layer, a plurality of pairs of clamping grooves are centrally symmetrically provided on the upper clamping seat, a plurality of clamping blocks are provided along the circumference of the anchor rod shell, the positions and numbers of the clamping blocks correspond one to one with the positions of the clamping blocks and the grooves, the clamping blocks can slide into the clamping groove through the entrance of the clamping groove for locking connection, a plurality of vertical long holes are evenly distributed along the circumference on the telescopic layer, and the strong grip tube can pass through the long holes.

[0013] Preferably, the slot is U-shaped and the entrance is arranged along the axial direction of the anchor rod housing, the number and position of the long holes correspond to the strong grip tubes one by one and are both even numbers, and the telescopic layer is made of high-elastic rubber.

[0014] The present invention also relates to a construction process for a strong-grasp grouting anchor rod for a loose body structure, based on the above-mentioned strong-grasp grouting anchor rod for a loose body structure, specifically comprising the following steps:

[0015] S1, drive the anchor rod into the drill hole of the soil, rotate the anchor rod housing clockwise to unscrew the buckle of the locking mechanism, release the compression layer of the locking mechanism to pop open the upper and lower clamping seats 33, move the grouting pipe and the anchor rod housing out of the drill hole, and make each strong gripping pipe of the strong gripping pipe assembly move out of the anchor rod under the action of the spring until each of the strong gripping pipes is completely inserted into the soil;

[0016] S2, pushing the grouting pipe into the borehole, the compression layer of the locking mechanism is reset, and then the anchor housing is rotated counterclockwise, the buckle of the locking mechanism is re-locked, so that the position of each strong grip pipe is locked;

[0017] S3, using a pressure pump to inject grout into the grouting pipe to form a grouting column, and at the same time, the slurry flows out along the circumference of the grouting pipe to each of the strong gripping pipes, so that the slurry forms a grouting surface inside the soil to ensure the stability of the loose body structure.

[0018] Compared with the prior art, the present invention has achieved the following technical effects:

[0019] The strong-grip grouting anchor designed in the present invention adopts a method of combining a lateral rigid structure to increase the gripping force and duct grouting to compensate for the problems of uneven grouting and large deviation in structural stability, and effectively alleviates the problem of loose structural layers in the cross-sectional direction of the anchor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. 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 these drawings without paying creative work.

[0021] Figure 1 It is a schematic structural diagram of a strong-grasp grouting anchor rod for a loose body structure according to an embodiment of the present invention;

[0022] Figure 2 It is a structural schematic diagram of a locking mechanism in an embodiment of the present invention;

[0023] Figure 3 It is a structural schematic diagram of a rotating hand wheel in an embodiment of the present invention;

[0024] Figure 4 This is a process flow chart of a strong-grasp grouting anchor for a loose body structure in an embodiment of the present invention;

[0025] In the figure: 1- grouting pipe; 2- strong grip pipe, 21- rigid sleeve, 22- flexible hose, 23- spring; 3- locking mechanism, 31- upper clamping seat, 32- clamping slot, 33- lower clamping seat, 34- clamping block; 4- compression layer, 41- long hole; 5- positioning bracket; 6- rotating hand wheel, 61- plug block, 62- slot, 7- anchor rod housing. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] The purpose of the present invention is to provide a strong-grasp grouting anchor rod and a construction process for loose body structures, so as to solve the problems existing in the prior art and stabilize the structural layer in the cross-sectional direction of the anchor rod.

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Embodiment 1

[0030] like Figures 1 to 3 As shown, in this embodiment, a strong-grip grouting anchor rod for a loose body structure is provided, including an anchor rod shell 7, a grouting pipe 1, a strong-grip pipe assembly and a locking mechanism 3. The grouting pipe 1 passes through the anchor rod shell 7, one end of the anchor rod shell 7 is detachably connected to a rotating handwheel 6, and the other end is movably connected to the strong-grip pipe assembly through the locking mechanism 3. Each strong-grip pipe 2 of the strong-grip pipe assembly is connected to the grouting pipe 1 and can be retracted and expanded through the locking mechanism 3. After being expanded, the strong-grip pipe 2 can be inserted into the soil around the borehole.

[0031] As an optional solution, in this embodiment, a groove and a pair of slots 62 are provided at the center of the tail end of the anchor rod housing 7, the grouting pipe 1 passes through the center of the groove, the slots 62 are symmetrically arranged on the end face of the anchor rod housing 7, and an insert block 61 matching the slots 62 is provided on the support rod of the rotating handwheel 6.

[0032] As an optional solution, in this embodiment, a plurality of positioning brackets 5 are arranged at equal intervals in the hollow cavity of the anchor rod housing 7, and the grouting pipe 1 passes through the center of the positioning bracket 5, and the grouting pipe 1 and the positioning bracket 5 can slide relative to each other.

[0033] As an optional solution, the positioning bracket 5 in this embodiment includes three layers of support rods and a circular ring. The upper and lower layers of support are symmetrically arranged about the middle layer, and each layer of support rods is radially distributed in the circumference of the circular ring. The grouting pipe 1 runs through the circular ring. The angle between the planes of two adjacent layers of support rods is 5°-15°. The positioning bracket 5 and the grouting pipe 1 together constitute the basic structure of the grouting anchor rod.

[0034] As an optional solution, the spacing of the positioning brackets 5 in this embodiment is 10cm-20cm, and the positioning brackets 5 are welded in the hollow cavity of the anchor rod housing 7. The function of the grouting pipe 1 is basic grouting. When the anchor rod penetrates into the soil layer, the flowing slurry is injected into the soil layer to achieve the reinforcement effect of the soil layer.

[0035] As an optional solution, the strong grip pipe assembly in this embodiment includes a rigid sleeve 21 and a flexible hose 22. A plurality of flexible hoses 22 are evenly distributed and connected to the same cross section of the grouting pipe 1 along the circumferential direction. Two sections of rigid sleeves 21 are provided on the outer shell of each flexible hose 22. One end of the two rigid sleeves 21 is connected by a spring 23 to form a V-shaped structure. The rigid sleeve 21 at one end of the V-shaped structure is connected to the side wall of the grouting pipe 1 by the spring 23, and the other end is locked in the locking mechanism 3. Among them, the spring 23 is a micro-strong spring, which serves as the release power of the strong grip pipe 2 to ensure that the pipe bone can be released normally during construction; the rigid sleeve 21 has a strong hardness, and a tip is provided at the top. When the spring 23 is released, the rigid sleeve 21 has a strong penetrating ability and extends to the outside, like an umbrella rib opening. At this time, grouting can form a large grouting surface around the anchor rod, making the loose body structure more stable after grouting. The outer shell of the strong grip pipe 2 is hinged to the side wall of the grouting pipe 1 through a hinge ear and a pin shaft, and the internal hose of the strong grip pipe 2 is connected to the grouting pipe 1. When the anchor rod body rotates, due to the fixing effect of its positioning bracket 5, the strong grip pipe 2 and the grouting pipe 1 remain relatively still and do not involve rotation.

[0036] As an optional solution, in this embodiment, the diameter of the flexible hose 22 is 3mm-5mm, and the diameter of each section of the rigid sleeve 21 is 5mm-8mm and the length is 5cm-10cm. In this embodiment, the strong gripping tube 2 can not only provide rigid support for the structural layer in the cross-sectional direction of the anchor rod, but also perform grouting and stabilize the structural layer in the cross-sectional direction.

[0037] As an optional scheme, the locking mechanism 3 in this embodiment includes an upper clamping seat 3, a lower clamping seat 33 and a telescopic layer. A transverse incision is provided at the front end of the anchor rod shell 7. The outer layers of the anchor rod shell 7 on both sides of the transverse incision are respectively connected to the upper clamping seat 3 and the lower clamping seat 33, and the inner layers are connected as a whole through the telescopic layer. A plurality of pairs of slots 32 are centrally symmetrically provided on the upper clamping seat 3, and a plurality of snap-in blocks 34 are provided along the circumference of the anchor rod shell 7. The positions and numbers of the snap-in blocks 34 correspond to those of the slots 32 one by one. The snap-in blocks 34 can slide into the slots 32 through the entrance of the slots 32 to form a snap-in structure for locking connection. A plurality of vertical long holes 41 are evenly distributed along the circumference of the telescopic layer, and the strong grip tube 2 can pass through the long holes 41. Specifically, the wall of the anchor rod housing 7 at the cross-cut is a double-layer structure with two layers inside and outside, the upper clamping seat 3 and the lower clamping seat 33 are both located in the outer layer and the lower clamping seat 33 can be inserted into the upper clamping seat 3, and the telescopic layer is located in the inner layer; the inner pipe wall of the anchor rod needs to be relatively smooth, so that the strong gripping pipe 2 can be released from the inside and extended from the long strip hole 41 of the telescopic layer to penetrate into the loose soil, and it can also not cause disturbance of the soil beyond the safety range. The inner wall of the anchor rod of this embodiment has a limiting effect on the strong gripping pipe 2. When strong grip grouting is required, the clamping block 34 is separated from the restriction of the clamping groove 32 by rotating the buckle, the upper clamping seat 3 and the lower clamping seat 33 are separated, the telescopic layer rebounds, and the strong gripping pipe 2 pops out from the long strip hole 41 of the telescopic layer. The material of the telescopic layer is a highly elastic material that can be stretched and can be rubber. When the upper clamping seat 3 and the lower clamping seat 33 are clamped, the telescopic layer can act as a sealing ring to play a sealing role; when the upper clamping seat 3 and the lower clamping seat 33 are separated, they can act as a traction layer to prevent the anchor rod from being unable to dock in the original way. After the strong gripping tube 2 passes through the telescopic layer, the anchor rod can be pushed upward to rotate the clamping block 34 of the lower clamping seat 33 and push it back into the clamping groove 32 of the upper clamping seat 3.

[0038] As an optional solution, the shape of the slot 32 in this embodiment is U-shaped and the entrance is arranged along the axial direction of the anchor rod housing 7. The long holes 41 correspond to the number and position of the strong gripping tubes 2 one by one and are both even numbers. The material of the telescopic layer is high elastic rubber. In this embodiment, the lengths of the two ends of the U-shaped slot 32 are different, and the entrance length is longer. The internal slot 32 is mainly used to lock the circumferential position of the clamping block 34; the number of strong gripping tubes 2 and the corresponding entrances and grooves should be designed to be 8-16, an even number.

[0039] Embodiment 2

[0040] like Figure 4 As shown, in this embodiment, a construction process for a strong-grasp grouting anchor rod for a loose body structure is provided. Based on the above-mentioned strong-grasp grouting anchor rod for a loose body structure, the process specifically includes the following steps:

[0041] S1, drive the anchor into the borehole of the soil, rotate the anchor housing 7 clockwise to unscrew the buckle of the locking mechanism, release the compression layer 4 of the locking mechanism to pop open the upper clamping seat 3 and the lower clamping seat 33, move the grouting pipe 1 and the anchor housing 7 out of the borehole, and convert the elastic potential energy of the micro spring 23 into the kinetic energy of the rigid sleeve 21 to stretch outward, so that each strong gripping pipe 2 of the strong gripping pipe assembly moves out of the anchor under the action of the spring 23 until each strong gripping pipe 2 is completely penetrated into the soil;

[0042] S2, push the grouting pipe 1 into the borehole, the compression layer 4 of the locking mechanism is reset, and then the anchor housing 7 is rotated counterclockwise, the buckle of the locking mechanism is re-locked, so that the position of each strong grip pipe 2 is locked;

[0043] S3, use a pressure pump to inject grout into the grouting pipe 1 to form a grouting column, and at the same time, the slurry flows out along the circumference of the grouting pipe 1 to each strong grip pipe 2, so that the slurry forms a grouting surface inside the soil to ensure the stability of the loose body structure.

[0044] This embodiment adopts a combination of conventional grouting + rigid support + cross-section grouting for the anchor construction of the loose body structure. On the basis of the conventional grouting method, the rigid support of the cross-section is added to make the conventional grouting section more stable. It also makes up for the shortcoming of loose soil structure in the cross-section direction of the loose body structure construction, and effectively prevents a series of engineering problems caused by large deviations in structural stability.

[0045] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A strong grip grouting anchor for loose body structure, characterized by: It includes an anchor rod shell, a grouting pipe, a strong grip pipe assembly and a locking mechanism. The grouting pipe runs through the anchor rod shell. One end of the anchor rod shell is detachably connected to a rotating hand wheel, and the other end is movably connected to the strong grip pipe assembly through the locking mechanism. Each strong grip pipe of the strong grip pipe assembly is connected to the grouting pipe and can be retracted and expanded through the locking mechanism. After being expanded, the strong grip pipe can be inserted into the soil around the borehole.

2. The strong grip grouting anchor for loose body structure according to claim 1, characterized in that: A groove and a pair of slots are arranged at the center of the tail end of the anchor rod housing, the grouting pipe passes through the center of the groove, the slots are symmetrically arranged on the end face of the anchor rod housing, and an insert matching the slots is arranged on the support rod of the rotating hand wheel.

3. The strong grip grouting anchor for loose body structure according to claim 1, characterized in that: A plurality of positioning brackets are arranged at equal intervals in the hollow cavity of the anchor rod housing, the grouting pipe runs through the center of the positioning bracket, and the grouting pipe and the positioning bracket can slide relative to each other.

4. The strong grip grouting anchor for loose body structure according to claim 3, characterized in that: The positioning bracket includes three layers of support rods and a circular ring. The upper and lower layers of support are symmetrically arranged about the middle layer, and each layer of support rods is radially distributed around the circumference of the circular ring. The grouting pipe runs through the circular ring, and the angle between the planes of two adjacent layers of support rods is 5°-15°.

5. The strong grip grouting anchor for loose body structure according to claim 3, characterized in that: The spacing between the positioning brackets is 10cm-20cm, and the positioning brackets are welded in the hollow cavity of the anchor rod housing.

6. The strong grip grouting anchor for loose body structure according to claim 1, characterized in that: The strong grip pipe assembly includes a rigid sleeve and a flexible hose. A plurality of the flexible hoses are evenly distributed and connected along the circumferential direction on the same cross-section of the grouting pipe. Two sections of the rigid sleeves are arranged on the outer sleeve of each flexible hose. One end of the two rigid sleeves are connected by a spring to form a V-shaped structure. The rigid sleeve at one end of the V-shaped structure is connected to the side wall of the grouting pipe by a spring, and the other end is locked in the locking mechanism.

7. The strong grip grouting anchor for loose body structure according to claim 6, characterized in that: The diameter of the flexible hose is 3mm-5mm, and the diameter of each section of the rigid sleeve is 5mm-8mm and the length is 5cm-10cm.

8. The strong-grasp grouting anchor for loose body structure according to claim 1, characterized in that: The locking mechanism includes an upper clamping seat, a lower clamping seat and a telescopic layer. A transverse incision is provided at the front end of the anchor rod shell. The outer layers of the anchor rod shells on both sides of the transverse incision are respectively connected to the upper clamping seat and the lower clamping seat, and the inner layers are connected as a whole through the telescopic layer. A plurality of pairs of clamping grooves are centrally symmetrically provided on the upper clamping seat, and a plurality of clamping blocks are provided along the circumference of the anchor rod shell. The positions and numbers of the clamping blocks correspond one to one, and the clamping blocks can slide into the clamping groove through the entrance of the clamping groove for locking connection. A plurality of vertical long strip holes are evenly distributed along the circumference on the telescopic layer, and the strong grip tube can pass through the long strip holes.

9. The strong grip grouting anchor for loose body structure according to claim 8, characterized in that: The shape of the card slot is U-shaped and the entrance is arranged along the axial direction of the anchor rod housing. The number and position of the long holes correspond to the strong gripping tubes one by one and are both even numbers. The material of the telescopic layer is high-elastic rubber.

10. A construction process for a strong-grasp grouting anchor rod for a loose body structure, based on the strong-grasp grouting anchor rod for a loose body structure according to any one of claims 1 to 9, characterized in that: The specific steps include: S1, drive the anchor rod into the drill hole of the soil, rotate the anchor rod housing clockwise to unscrew the buckle of the locking mechanism, release the compression layer of the locking mechanism to pop the upper and lower clamping seats apart, move the grouting pipe and the anchor rod housing out of the drill hole, and move each strong gripping pipe of the strong gripping pipe assembly out of the anchor rod under the action of the spring until each of the strong gripping pipes is completely inserted into the soil; S2, pushing the grouting pipe into the borehole, the compression layer of the locking mechanism is reset, and then the anchor housing is rotated counterclockwise, the buckle of the locking mechanism is re-locked, so that the position of each strong grip pipe is locked; S3, using a pressure pump to inject grout into the grouting pipe to form a grouting column, and at the same time, the slurry flows out along the circumference of the grouting pipe to each of the strong gripping pipes, so that the slurry forms a grouting surface inside the soil to ensure the stability of the loose body structure.

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