Anchoring method and anchor for soft soil areas

Abstract

The application provides an anchor rod for soft soil areas and an anchoring method thereof, which comprises a barrel and a central rod, a group of rotating chucks are equidistantly arranged in the barrel through supports, a plurality of openings are arranged on the barrel at each rotating chuck in the axial direction, the axis of the rotating chuck is aligned with the axis of the barrel, the support is fixedly connected with the barrel, the rotating chuck can rotate relative to the support / barrel, the upper part of the rotating chuck is provided with an outwardly extending edge part, a clamping groove is arranged in the middle of the outwardly extending edge part, 2-5 steel wires are connected in the clamping groove, the other end of each steel wire is connected with the tail end of a rotating blade, the rotating blade is arranged in the opening of the barrel through a rotating shaft arranged in the middle of the rotating blade, the blade edge end of the rotating blade is adsorbed through a magnet arranged in the opening, and a clamping block parallel to the axial direction of the rotating chuck is arranged on the inner wall of the rotating chuck. The head end of the central rod is provided with a clamping block, the central rod is of a hollow structure, and the outer wall is provided with a scale. The anchor rod can increase the engagement force between the anchor rod and the soil.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of construction engineering equipment, and particularly relates to an anchor rod for soft soil areas and an anchoring method thereof. BACKGROUND

[0002] Due to the need of engineering construction, the number of slopes is still increasing, and the safety of the slope is the first problem to be considered. As a supporting form, the anchor rod is mainly applied to foundation pits, slopes, tunnels, dams, anti-seismic engineering, etc. The rise of anchor rod supporting technology is an important turning point in the field of geotechnical engineering for protection and management engineering, and is currently widely applied in practical engineering.

[0003] Anchor rod supporting is a safe and economical supporting method, which is a general term for supporting structures taking anchor rods as the main body. The technology is to form a hole in the soil layer, bury the anchor rod, and then pour cement or cement mortar, so as to rely on the friction between the anchoring body and the soil, the gripping force between the rod and the anchoring body, and the strength of the rod to jointly bear the load acting on the supporting structure. Anchor rod supporting has the characteristics of simple structure, convenient construction, low cost, strong adaptability to engineering, etc., and has been widely applied in the field of engineering.

[0004] Anchor rod anchoring is to tightly connect the structure and the stratum together through the anchor rod in the stratum, rely on the shear strength between the anchor rod and the surrounding stratum to transfer the tension of the structure, so as to reinforce the stratum itself and achieve the purpose of keeping the structure and the soil stable. Compared with the traditional supporting method, anchor rod anchoring technology has the advantages of good supporting effect, low labor intensity, high construction efficiency, and obvious economic benefits.

[0005] With the increasing demand for the development and utilization of underground space, the demand for anchor rods is increasing. However, after the soft soil is subjected to vibration, the soil structure is damaged and its strength is reduced. At this time, the soft soil will soon show a state of dilution, showing characteristics of high compressibility, rheology, low strength, etc., and is prone to anchor loss. Therefore, the present application provides an anchor rod for soft soil areas, which uses a sharp blade to cut into the soil to increase the gripping force between the anchor rod and the soil, and at the same time, the mortar can overflow through the side opening to increase the gripping force between the soil and the anchor rod, thereby ensuring the anchoring strength of the anchor rod. SUMMARY

[0006] Technical problem: In view of the defect that the existing anchor rod is difficult to be applied to soft soil areas, the present application provides an anchor rod for soft soil areas and an anchoring method thereof, which uses a sharp blade to cut into the soil to increase the gripping force between the anchor rod and the soil, and at the same time, uses a side opening to let the mortar overflow to increase the gripping force between the soil and the anchor rod, thereby ensuring the anchoring strength of the anchor rod. The device can be produced in engineering specification, and is convenient to install and use on site, and can be effectively used for supporting in soft soil areas.

[0007] Technical solutions: To achieve the above-mentioned purposes, the technical solutions of the present application are as follows:

[0008] An anchor rod for soft soil area, comprising a barrel and a center rod, a group of rotating chucks are installed in the barrel at equal intervals by supports, a plurality of openings are arranged on the barrel at each rotating chuck along the axial direction, the axis of the rotating chuck is aligned with the axis of the barrel, the support is fixedly connected with the barrel, the rotating chuck can rotate relative to the support / barrel, the upper part of the rotating chuck has an outwardly extending edge portion, a clamping groove is formed in the middle of the outwardly extending edge portion, 2-5 steel wires are connected in the clamping groove, the other end of each steel wire is connected to the tail end of a rotating blade, the rotating blade is installed in the opening of the barrel by a rotating shaft in the middle, the blade edge end of the rotating blade is attracted by a magnet installed in the opening, a clamping block parallel to the axial direction is arranged on the inner wall of the rotating chuck; the head end of the center rod is provided with a clamping block, the center rod is hollow inside, and the outer wall has a scale.

[0009] Further, the outer wall of the rotating chuck is provided with a group of ratchet teeth parallel to the axial direction, and the inner side of the support is provided with a buckle for clamping the ratchet teeth.

[0010] Further, a lubricant is coated between the rotating chuck and the support, and the lubricant comprises a graphene material.

[0011] Further, the outer wall of the barrel is serrated.

[0012] Further, the number of openings arranged on the barrel at each rotating chuck along the axial direction is one-to-one corresponding to the number of rotating blades and the number of steel wires at the position.

[0013] Further, the tail end of the rotating blade has a connecting hole connected with the steel wire, and a rotating shaft hole for installing the rotating shaft in the middle.

[0014] The above-mentioned anchor rod for soft soil area, the anchoring method comprises the following steps:

[0015] (1) drilling a hole in the soft soil body to be anchored, the diameter of the hole is the same as the outer diameter of the barrel;

[0016] (2) inserting the assembled anchor rod into the drilled hole to reach the fixed position;

[0017] (3) Insert the center rod into the barrel, and determine the position of the clamping block at the front end of the center rod according to the scale on the center rod. When the clamping block reaches each clamping block in turn, rotate the center rod to drive the clamping block and the rotating chuck to rotate. With the rotation of the rotating chuck, the steel wire is wound on the clamping groove in the middle of the edge part, so that the rotating blade is pulled to rotate, and the cutting edge of the rotating blade is separated from the magnet adsorbed thereon under the action of the pulling force of the steel wire and extends outward to cut into the soil outside the barrel. The cutting edge cuts the soil to increase the engagement force between the soil and the anchor rod; after rotating to the maximum angle, the clamping buckle clamps the ratchet to prevent the rotating chuck from reversing.

[0018] (4) After the center rod rotates each rotating chuck to cut each rotating blade into the soil outside the barrel and reaches the deepest part of the barrel, the mortar is injected from the hollow cavity in the middle of the center rod. After the mortar fills the center rod, it reaches the barrel and then flows out from each opening of the barrel until the mortar flows out from the top end of the barrel, and the grouting is completed.

[0019] The beneficial effects of the present application are:

[0020] 1. All production and assembly of the device can be carried out in the factory, avoiding the difficulties of on-site operation and poor accuracy, and facilitating the standardized design, manufacture and installation of the vibration reduction device, and improving the work efficiency.

[0021] 2. The center rod is marked with a scale to show the depth of the center rod inserted into the barrel, which facilitates the rotation of the bearing and the adjustment of the angle of the rotating blade.

[0022] 3. The graphene material or other lubricant is coated on the rotating shaft and other components, effectively reducing the friction resistance during the rotation of the center rod, and facilitating the operation of the workers.

[0023] 4. The present application uses a cutting edge to cut into the soil, increasing the engagement force between the soil and the anchor rod, so that the anchor rod is more firmly fixed in the soil.

[0024] 5. The present application injects mortar through the center rod, and the center rod is inserted into the deepest end, and the mortar flows from the innermost end to the orifice, effectively ensuring the injection density of the mortar. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a front view of the anchor rod;

[0026] Figure 2 is an axial sectional view of the barrel;

[0027] Figure 3 is a radial sectional view of the barrel;

[0028] Figure 4 is a radial sectional view of the barrel and Figure 4 the rotating blade is not shown in the middle;

[0029] Figure 5 is a schematic view of the rotating blade;

[0030] Figure 6 is a schematic view of the rotating chuck structure;

[0031] Figure 7 is a schematic view of the rotating chuck structure; Figure 6 is a cross-sectional view of A-A in

[0032] Figure 8 is a front view of the central rod.

[0033] Figure 9 is a side view of the central rod.

[0034] In the figure: barrel 1, rotating blade 2, magnet 3, support 4, rotating chuck 5, steel wire 6, rotating shaft 7, rotating shaft hole 8, connecting hole 9, central rod 10, buckle 11, ratchet 12, clamping block 13, clamping block 14, outwardly extending edge part 15, clamping groove 16. Embodiment

[0035] The present application will be further illustrated below in conjunction with the accompanying drawings and specific embodiments, and it should be understood that the following specific embodiments are only used to illustrate the present application and not to limit the scope of the present application.

[0036] When the anchor rod and the soil body slide, the anchor rod will be pulled out, and in severe cases, it will cause serious engineering accidents. Soft soil has the characteristics of high compressibility, rheological property, and low strength, and is more likely to be pulled out. By increasing the bite force of the anchor rod and the soil body and the gripping force of the anchor rod and the soil body, the anchoring strength of the anchor rod can be effectively increased to prevent the anchor rod from being pulled out. Therefore, the bite force of the soil body and the anchor rod is increased by cutting the soil with a sharp blade, and the gripping force of the anchor rod and the soil body is increased by overflowing the mortar laterally, so as to effectively ensure the anchoring strength of the anchor rod.

[0037] The anchor rod for soft soil area provided by the present application has the advantages that Figures 1-9As shown. Including the cylinder 1 and the center rod 10, the inside of the cylinder 1 is installed with a set of rotating chuck 5 through the support 4 at equal intervals, the cylinder 1 is provided with a number of openings at each rotating chuck along the axial direction, the axis of the rotating chuck 5 is aligned with the axis of the cylinder 1, the support 4 is fixedly connected with the cylinder 1, the rotating chuck 5 can rotate relative to the support 4 / cylinder 1, the upper part of the rotating chuck has an outwardly extending edge 15, which enables the rotating chuck 5 to be clamped on the support 4, the outwardly extending edge 15 has a clamping groove 16 in the middle, 2-5 steel wires 6 are connected in the clamping groove, the other end of each steel wire 6 is connected to the tail end of the rotating blade 2, the rotating blade 2 is installed in the opening of the cylinder 1 through the rotating shaft 7 in the middle, the blade edge end of the rotating blade 2 is adsorbed by the magnet 3 installed in the opening, the inner wall of the rotating chuck is provided with a clamping block 13 parallel to the axial direction; The head end of the center rod is provided with a clamping block 12, the inside of the center rod is hollow, and the outer wall has a scale.

[0038] The outer wall of the rotating chuck in the embodiment is provided with a set of ratchet teeth 12 parallel to the axial direction, and the inner side of the support is provided with a buckle 11 for clamping the ratchet teeth, so that the rotating chuck 5 can be prevented from being reversed.

[0039] The rotating chuck 5 and the support 4 in the embodiment are coated with a lubricant, and the lubricant includes graphene material, which effectively reduces the friction resistance during the operation of the device.

[0040] The outer wall of the cylinder 1 in the embodiment is zigzag-shaped, which further increases the engagement force between the cylinder 1 and the soil body.

[0041] The number of openings provided on the cylinder 1 at each rotating chuck 5 in the embodiment is one-to-one corresponding to the number of rotating blades 2 and the number of steel wires 6 at the place. Other positions of the cylinder can also be provided with openings for overflow of the mortar during the grouting process.

[0042] The tail end of the rotating blade 2 in the embodiment has a connecting hole 9 connected with the steel wire 6, and has a rotating shaft hole 8 in the middle for installation on the rotating shaft.

[0043] The above-mentioned anchoring method for the anchor rod in soft soil area, the method comprises the following steps:

[0044] (1) drilling holes in the soft soil body to be anchored, the diameter of the hole is the same as the outer diameter of the cylinder;

[0045] (2) inserting the assembled anchor rod into the drilled hole to reach the fixed position;

[0046] (3) insert the center rod into the barrel, according to the scale on the center rod to determine the front end of the center rod block reaches each clamping block in turn, rotate the center rod to make the clamping block drive the clamping block to rotate, with the rotation of the rotating chuck, the steel wire is wound on the clamping groove in the middle of the edge, so that the steel wire pulls the rotating blade to rotate, the blade edge of the rotating blade is separated from the magnet adsorbed under the action of the pulling force of the steel wire and extends outward to cut into the soil outside the barrel, the cutting soil increases the engagement force between the soil and the anchor rod; after rotating to the maximum angle, the buckle is clamped to the ratchet to prevent the rotating chuck from reversing;

[0047] (4) after the center rod rotates each rotating chuck to cut each rotating blade into the soil outside the barrel and reaches the deepest part of the barrel, inject the mortar from the hollow cavity in the middle of the center rod, and the mortar fills the center rod to reach the barrel, and then flows out from each opening of the barrel, until the mortar flows out from the top end of the barrel, completing the grouting.

[0048] In this embodiment, the following aspects need attention:

[0049] I. The length of the anchor rod and the number of notches should be selected according to the quality of the soil. When the soil is soft, the length of the anchor rod and the number of notches should be increased to ensure the anchoring strength of the anchor rod.

[0050] II. When drilling, the hole diameter should be strictly controlled according to the outer diameter of the anchor rod to avoid the rotating blade from cutting into the soil due to the excessively large hole diameter.

[0051] III. The inner diameter of the center rod should not be too small to avoid blockage when injecting mortar.

[0052] IV. The support should be appropriately strengthened to avoid buckling during work, which may cause displacement of the bearing.

[0053] V. The steel wire should have sufficient rigidity to avoid breaking during work.

[0054] VI. The components in the rotating chuck should be fully lubricated to reduce the friction between the components.

[0055] The above is the preferred embodiment of the present application. It should be noted that for ordinary skilled persons in the technical field, several improvements can still be made without departing from the principles of the present application, and these improvements should also be considered within the protection scope of the present application.

Claims

1. An anchor rod for use in soft soil areas, characterised in that, The anchor rod comprises a barrel and a central rod, a plurality of rotating chucks are installed at equal intervals in the barrel by supports, a plurality of openings are arranged on the barrel at each rotating chuck along the axial direction, the axis of the rotating chuck is aligned with the axis of the barrel, the support is fixedly connected with the barrel, the rotating chuck can rotate relative to the support and the barrel, the upper part of the rotating chuck has an outwardly extending edge portion, a clamping groove is arranged in the middle of the outwardly extending edge portion, 2-5 steel wires are connected in the clamping groove, the other end of each steel wire is connected with the tail end of a rotating blade, the rotating blade is installed at the opening of the barrel by a rotating shaft in the middle, the blade edge end of the rotating blade is adsorbed by a magnet installed at the opening, a clamping block parallel to the axial direction is arranged on the inner wall of the rotating chuck; the head end of the central rod is provided with a clamping block, the central rod is a hollow structure, and the outer wall has a scale.

2. An anchor rod for use in soft ground according to claim 1, characterised in that, The outer wall of the rotating chuck is provided with a plurality of ratchets parallel to the axial direction, and the inner side of the support is provided with a buckle for clamping the ratchets.

3. An anchor rod for use in soft ground according to claim 1 or 2, characterised in that, A lubricant is coated between the rotating chuck and the support, and the lubricant comprises a graphene material.

4. An anchor rod for use in soft ground according to claim 1 or 2, characterised in that, The outer wall of the barrel is serrated.

5. An anchor rod for use in soft ground according to claim 1 or 2, characterised in that, The number of openings arranged on the barrel at each rotating chuck along the axial direction is in one-to-one correspondence with the number of rotating blades and the number of steel wires at the position.

6. An anchor rod for use in soft ground according to claim 1 or 2, characterised in that, The tail end of the rotating blade has a connecting hole connected with the steel wire, and a rotating shaft hole for installing the rotating shaft is arranged in the middle.

7. A method of anchoring an anchor rod for use in soft ground according to any one of claims 2 to 6, characterised in that, The method comprises the following steps: (1) drilling a hole in the soft soil to be anchored, the diameter of the hole being the same as the outer diameter of the barrel; (2) inserting the assembled anchor rod into the drilled hole to reach the fixed position; (3) inserting the central rod into the barrel, when the clamping block at the front end of the central rod reaches each clamping block in turn according to the scale on the central rod, rotating the central rod to drive the clamping block to rotate the rotating chuck, with the rotation of the rotating chuck, the steel wire is wound on the clamping groove in the middle of the edge portion, so that the steel wire drives the rotating blade to rotate, the blade edge end of the rotating blade is separated from the magnet adsorbed under the action of the tension of the steel wire and extends outward to cut into the soil outside the barrel, the cutting of the rotating blade increases the engagement force between the soil and the anchor rod; after rotating to the maximum angle, the buckle clamps the ratchet to prevent the rotating chuck from reversing; (4) after the central rod rotates each rotating chuck to cut each rotating blade into the soil outside the barrel and reaches the deepest part of the barrel, injecting the mortar from the hollow cavity in the middle of the central rod, the mortar fills the central rod, then flows out from each opening of the barrel, until the mortar flows out from the top end of the barrel, and the grouting is completed.

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