Orifice plugging device for chambering anchor cable construction

Abstract

The utility model discloses an orifice plugging device for chambering anchor cable construction, which solves the problem that the interior of an anchor hole is easy to leak water in the prior art and has the beneficial effect of improving the plugging quality, and adopts the specific scheme that the orifice plugging device for chambering anchor cable construction comprises an air bag which is provided with a steel strand hole; the air bag is provided with an opening for a drill rod to penetrate through, an air inflation cavity and a steel strand hole are formed in the air bag, the opening and the air inflation cavity are separated, the air inflation pipe is communicated with the air inflation cavity of the air bag, the air bag is annularly provided with at least one sealing brush, the sealing brush is fixed to the air bag and opened, the air bag is provided with a grease injection guide pipe, and the grease injection guide pipe and the air inflation cavity are separated. One end of the grease injection guide pipe is located at the sealing brush.

Description

TECHNICAL FIELD

[0001] The utility model relates to the anchorage cable construction technical field especially a hole mouth plugging device for the hole expansion anchorage cable construction. BACKGROUND

[0002] The statements in this section merely provide background information related to the utility model and do not necessarily constitute the prior art.

[0003] The pile anchor support construction technology has been very mature since the 1990s, and is more economical than the underground continuous wall in cost and construction period. Due to the high underground water level, the pile anchor support structure often needs to be matched with artificial precipitation or water stop curtain water isolation and other auxiliary measures. When the water stop curtain is used for water isolation, the anchorage cable structure often needs to penetrate the water stop curtain, resulting in leakage nodes of the water stop curtain at the anchorage cable, and the leakage of the pile anchor support side wall has been a disadvantage that has plagued the development of the pile anchor support.

[0004] In the pile anchor support project, the anchorage cable as an important structural support element, its construction quality and stability are directly related to the safety and durability of the whole project. However, in the anchorage cable construction process, especially in the anchorage cable construction in the stratum rich in underground water, the hole leakage has been a difficult problem to be solved. First, the seepage of the hole will significantly affect the anchorage cable grouting quality and cause the influence on the anchorage cable bearing capacity; at the same time, the water stop curtain is penetrated, which will produce leakage risk in the subsequent construction work, cause water and soil loss, and affect the engineering safety. The traditional anchorage cable hole plugging method mostly uses cement grouting treatment, but this method has many deficiencies. First, the grouting process is complex and time-consuming, and it is difficult to ensure the uniformity and compactness of grouting. Second, the grouting effect is affected by many factors, such as underground water pressure, grouting material performance, etc., and it is often difficult to achieve ideal plugging effect. In addition, after grouting, it needs to wait for the solidification time, which increases the construction period and cost.

[0005] In the soft stratum, the method of expanding the anchorage diameter can effectively alleviate the defects such as mud flow and insufficient anchorage body gripping force in the artificial hole forming process of the conventional tension type anchorage cable. In the stratum with high underground water level and strong permeability, the existing hole expansion anchorage cable construction process often has problems such as insufficient grouting pressure, easy spewing of grout from the anchor hole, leakage of water in the anchor hole, and spewing of cement grout outside the anchor hole. After the anchorage cable is tensioned and locked, the anchorage head position may have different degrees of water leakage. Long-term anchorage cable leakage will cause the increase or exceeding of the settlement of the surrounding pipelines, buildings and structures. UTILITY MODEL CONTENTS

[0006] In view of the deficiencies of the prior art, the utility model aims to provide a hole mouth plugging device for hole expansion anchorage cable construction, which can effectively plug the hole mouth of the anchorage cable construction and eliminate the safety hazards caused by the anchorage cable leakage to the foundation pit.

[0007] To achieve the above object, the utility model is through the following technical scheme to realize:

[0008] A hole sealing device for reaming anchor cable construction, including air bag, air bag is provided with wire strand hole, air bag is provided with opening for drill rod to pass through, air bag inside has inflation cavity, wire strand hole, opening and inflation cavity are separately arranged, inflation pipe is in communication with the inflation cavity of air bag, air bag is provided with at least one sealing brush, sealing brush is fixed to air bag, sealing brush is set up, air bag is provided with grease injection pipe, grease injection pipe is separately arranged with inflation cavity, one end of grease injection pipe is located at sealing brush.

[0009] The hole sealing device for reaming anchor cable construction, the air bag is cylindrical, the wire strand hole is arranged through the air bag.

[0010] The hole sealing device for reaming anchor cable construction, the air bag is provided with two sealing brushes, and the two sealing brushes are arranged at intervals.

[0011] The hole sealing device for reaming anchor cable construction, the grease injection pipe is L-shaped, one end of the grease injection pipe is exposed from one end of the air bag, and the other end of the grease injection pipe is located between the two sealing brushes.

[0012] The hole sealing device for reaming anchor cable construction, the sealing brush includes a fixing ring, the fixing ring is sleeved on the air bag, a U-shaped groove is formed on one side of the fixing ring, and one end of the sealing brush is fixed in the U-shaped groove.

[0013] The hole sealing device for reaming anchor cable construction, the fastener passes through the side wall of the U-shaped groove to fix one end of the sealing brush to the fixing ring.

[0014] The hole sealing device for reaming anchor cable construction, the part of the sealing brush exceeding the U-shaped groove is bent outward, and the sealing brush is a steel wire brush.

[0015] The hole sealing device for reaming anchor cable construction, the air bag is provided with anti-slip lines, and the fixing ring is arranged at the anti-slip lines of the air bag.

[0016] The hole sealing device for reaming anchor cable construction, one end of the inflation pipe is exposed from one end of the air bag.

[0017] The hole sealing device for reaming anchor cable construction, the air bag is provided with a groove at the opening, and a circle of balls is arranged in the groove.

[0018] The utility model has the beneficial effects as follows:

[0019] 1) The drill pipe can pass through the air bag, the steel strand passes through the steel strand hole, and the air bag can be aerated through the inflation pipe, the air bag is provided with a sealing brush in the circumferential direction, the sealing brush opens towards the soil body, and the sealing brush expands further to fill the gap of the hole during the inflation process of the air bag, sealing grease is injected into the sealing brush through the grease injection pipe, and the sealing grease and the sealing brush jointly form a sealing effect, thereby further preventing the consolidation and sealing effect.

[0020] 2) The inflation pipe and the grease injection pipe are arranged, two sealing brushes are arranged in the circumferential direction of the air bag, the sealing brush is a steel wire brush, the sealing brush is tightly attached to the hole wall under the elastic action of the sealing brush, a cavity is formed between the two sealing brushes and the hole wall and the outer wall of the air bag, the grease injection pipe is L-shaped, the injected sealing grease can pass between the two sealing brushes, and the sealing effect is jointly formed with the sealing brush, so that the grouting slurry and the water and soil in the formation are prevented from leaking out, and the sealing effect is consolidated.

[0021] 3) The air bag is provided with a fixed ring in the circumferential direction, one end of the sealing brush can be inserted into the U-shaped groove of the fixed ring and fixed with the fixed ring, the sealing brush is made of flexible material and will not interfere with the plugging device entering the anchor hole, and after entering, the sealing brush is naturally attached to the hole wall, and in the inflation process of the air bag, the air bag gradually closes the space between the two adjacent sealing brushes, thereby ensuring the plugging effect.

[0022] 4) The air bag has flexible shape, the air bag can be conveniently installed in the exhaust state, the air bag can fill the anchor hole after inflation, the seepage gap is plugged, the sealing property of the hole is improved, and the outflow of underground water and soil is prevented. BRIEF DESCRIPTION OF DRAWINGS

[0023] The drawings accompanying the specification of the present utility model form a part thereof, serve to provide further understanding of the present utility model, and together with the description of the exemplary embodiments of the present utility model, serve the purpose of explaining the present utility model, and do not constitute an inappropriate limitation of the present utility model.

[0024] Figure 1 is a schematic view of a hole sealing device for reaming anchor cable construction according to one or more embodiments of the present utility model.

[0025] Figure 2 is a perspective view of a hole sealing device for reaming anchor cable construction according to one or more embodiments of the present utility model.

[0026] Figure 3 is an enlarged view of the sealing brush in the hole sealing device for reaming anchor cable construction according to one or more embodiments of the present utility model.

[0027] Figure 4It is the utility model according and one or more embodiments of a kind of hole plugging device for hole expansion anchor cable construction in use state schematic diagram.

[0028] In the figure: exaggeratedly show the mutual distance or size of each part position, schematic diagram is only illustrative.

[0029] Wherein: 1. steel strand hole, 2. ball, 3. inflatable tube, 4. grease injection conduit, 5. opening, 6. air bag, 7. sealing brush, 8. anchor hole wall, 9. vertical lines, 10. fixed ring, 11. steel wire brush, 12. soil body, 13. cement mortar, 14. anchor cable, 15. waterproof curtain, 16. plugging device. DETAILED DESCRIPTION

[0030] It should be noted that the following detailed description is exemplary, and is intended to provide further explanation of the utility model. Unless otherwise indicated, all technical and scientific terms used in the utility model have the same meaning as ordinarily understood by a person of ordinary skill in the art to which the utility model belongs.

[0031] It should be noted that the terms used herein are only for the description of specific embodiments, and are not intended to limit the exemplary embodiments according to the utility model. As used herein, unless the utility model explicitly indicates otherwise, the singular form is also intended to include the plural form, and furthermore, it should be understood that when the terms "comprise" and / or "include" are used in the specification, they mean that there is a feature, step, operation, device, component and / or combination thereof;

[0032] As introduced in the background, in the process of hole expansion anchor cable construction in the prior art, problems such as insufficient grouting pressure and slurry easily gushing out of the anchor hole often occur, and after the anchor cable grouting construction is completed, the problem of water leakage from the anchor hole is prone to occur. In order to solve the above technical problems, the utility model provides a hole plugging device for hole expansion anchor cable construction.

[0033] In a typical embodiment of the utility model, referring to Figure 1 As shown in the figure, a hole plugging device for hole expansion anchor cable construction, comprising an air bag 6, the air bag 6 is provided with a steel strand hole 1, the air bag is provided with an opening for the drill rod to pass through, the air bag 6 has an inflation cavity inside, the steel strand hole 1, the opening 5 and the inflation cavity are separately arranged, the inflation tube 3 is communicated with the inflation cavity of the air bag 6, the air bag 6 is circumferentially provided with at least one sealing brush 7, the sealing brush 7 is fixed to the air bag, the sealing brush is opened and arranged, the air bag 6 is provided with a grease injection conduit 4, the grease injection conduit 4 is separately arranged with the inflation cavity, and one end of the grease injection conduit is located at the sealing brush.

[0034] Airbag 6 is a ring-shaped sealed airbag. The inflation chamber in airbag 6 is not connected to the grease injection conduit. Airbag 6 is made of existing slightly elastic rubber material with a thickness of about 2-5mm. The size can be customized according to the diameter of the anchor hole under different construction conditions, preferably 8mm-12mm larger than the designed anchor hole diameter.

[0035] In this embodiment, the airbag 6 is provided with two sealing brushes 7 in a circumferential direction, and the distance between the two sealing brushes 7 is set. Of course, in other examples, more sealing brushes can be provided, which would require increasing the number of grease injection conduits. The outlet of each grease injection conduit 4 is located between two adjacent sealing brushes, and the angle between the grease injection conduits is set.

[0036] It is easy to understand that, in order to achieve the injection of grease, refer to Figure 2 As shown, the grease injection conduit 4 is L-shaped, with one end of the grease injection conduit protruding from one end of the airbag, and the other end of the grease injection conduit located between the two sealing brushes.

[0037] In this embodiment, the sealing brush 7 includes a retaining ring 10. The retaining ring 10 is made of elastic steel sheet and is fitted around the airbag 6 in the circumferential direction. Figure 3 As shown, one side of the fixing ring is bent outward to form a U-shaped groove. The sealing brush 7 is a wire brush 11 (a wire brush composed of multiple wires). One end of the wire brush 11 is fixed in the U-shaped groove. The length of the outer side of the U-shaped groove is less than the length of the inner side, so that the length of the fixing ring 10 near the inner side of the airbag is longer than the length of the outer side of the fixing ring. Fasteners such as screws pass through the side wall of the U-shaped groove to fix one end of the wire brush 11 to the fixing ring. The part of the wire brush 11 that extends beyond the U-shaped groove is bent outward toward the soil 12. The sealing brush is made of flexible material and will not interfere with the sealing device entering the anchor cable hole. After entering, the sealing brush naturally fits against the hole wall. During the inflation of the airbag, the airbag gradually closes the space between two adjacent sealing brushes to ensure the sealing effect.

[0038] It is easy to understand that the airbag 6 is provided with anti-slip texture in the circumferential direction, and the fixing ring is set at the anti-slip texture of the airbag. The anti-slip texture can be a protrusion on the surface of the airbag. The anti-slip texture increases the friction between the fixing ring and the airbag, preventing the fixing ring from coming off the airbag. In some examples, the airbag can be provided with vertical grooves 9 perpendicular to the outer side of the airbag in the circumferential direction. The distance between the two vertical grooves 9 is the width of the inner side of the fixing ring, so that the fixing ring can be inserted between the two vertical grooves 9.

[0039] In this embodiment, one end of the inflation tube 3 is exposed at one end of the airbag. The inflation tube 3 is an inflation hose used to inflate the airbag. The inflation tube has an opening at the airbag and a gas check valve at the opening to prevent the backflow of gas in the airbag. The airbag is inflated by an air pump. During inflation, the gas check valve opens into the airbag. After inflation is completed, the gas check valve closes due to the pressure difference between the inside and outside of the airbag, ensuring that the air pressure inside the airbag is stable.

[0040] Understandably, the airbag 6 has a groove at the opening, which is located near the end face of the airbag 6. A ring of ball bearings 2 is installed in the groove so that the drill rod can rotate relative to the airbag. Lubricating oil is injected into the ball bearings in advance. The steel strand hole 1 is set through the length of the airbag 6 and is parallel to the opening direction. There can be three steel strand holes, which are set at a set angle interval. The ball bearings can effectively reduce the friction between the drill rod and the airbag and prevent the sealing device from shifting when the drill rod is pulled up, thus affecting the sealing effect.

[0041] It is easy to understand that during the molding process of the airbag 6, the steel strand hole 1, the opening 5, the inflation tube 3, the grease injection conduit 4 and the groove are formed simultaneously. The material of the grease injection conduit 4 can be different from the material of the airbag, while the material of the inflation tube 3 can be the same as the material of the airbag. After the groove is formed, the ball bearing 2 can be inserted.

[0042] The orifice sealing device provided in this embodiment allows the drill rod to pass through the airbag 6, and the steel strand to pass through the steel strand hole 1. Air can be introduced into the inflation chamber of the airbag 6 through the inflation pipe 3. The airbag is also equipped with a sealing brush 7 circumferentially, which opens towards the soil. During the inflation of the airbag, the airbag will gradually expand, and the sealing brush 7 will expand along with the expansion of the airbag 6 to further fill the orifice gap. Sealing grease is injected into the sealing brush 7 through the grease injection conduit 4. The sealing grease and the sealing brush 7 together form a sealing effect, further preventing and consolidating the sealing effect.

[0043] The implementation steps of the entire sealing device are as follows: Figure 4 As shown, it includes the following:

[0044] Anchor holes of different diameters are formed by drilling. During the anchor cable production, several steel strands are fixed to the end of the anchor cable bundle by a flange. The jet grouting drill bit is passed through the pre-reserved opening in the middle of the sealing device and pushed against the flange at the end of the anchor cable bundle to send the anchor cable bundle to the bottom of the anchor hole. Then, during the process of lifting the jet grouting drill bit, the soil around the anchor hole is cut by high-pressure cement slurry to form an enlarged head.

[0045] During the anchor cable fabrication process, based on the distance between the foundation pit surface and the water-stop curtain 15, the airbag is inserted into the anchor cable 14 from the tail end (near the anchor hole opening). This ensures that the sealing device 16, after entering the anchor hole with the steel strand, is positioned precisely at the junction of the water-stop curtain and the anchor hole. Each steel strand passes through the reserved steel strand hole in the sealing device 16. The sealing device, inflation pipe 3, and grease injection conduit are tied to the steel strand with cable ties for fixation and led to the outside of the anchor hole opening for protection. This prevents construction materials from entering the pipes and causing blockages that could affect subsequent procedures. The airbag 6 is inflated to one-third of its rated pressure through the inflation pipe 3 to further secure it. During the anchoring process, care is taken to minimize collisions between the anchor cable and the anchor hole wall 8 to prevent hole collapse.

[0046] After the sealing device 16 is placed in the predetermined position, the position of the sealing device 16 is higher than the ordinary anchoring section. Cement grout 13 is injected into the ordinary anchoring section and the jet grouting expansion section. The inflation tube of the airbag is connected to the inflation equipment. The airbag is inflated to the rated pressure through the inflation equipment. During the inflation process, the airbag will gradually expand. The wire brush will expand with the expansion of the airbag to further fill the gap at the orifice.

[0047] Finally, sealing grease is injected between the two wire brushes through the grease injection tube. The grease and the wire brushes work together to form a seal, further preventing and consolidating the sealing effect.

[0048] In addition, the number of sealing devices can be increased according to specific project needs. For example, they can be placed at the junction of the free section and the anchoring section of the anchor cable to further ensure grouting pressure and consolidate the construction effect.

[0049] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A borehole sealing device for borehole reamed anchor cable construction, characterized in that, The device includes an airbag with a steel strand hole and an opening for the drill rod to pass through. The airbag has an inflation chamber inside, and the steel strand hole and the opening are separated from the inflation chamber. An inflation tube is connected to the inflation chamber of the airbag. The airbag is circumferentially equipped with at least one sealing brush, which is fixed to the airbag and is open. The airbag is equipped with a grease injection conduit, which is separated from the inflation chamber. One end of the grease injection conduit is located at the sealing brush.

2. The borehole sealing device for borehole reamed anchor cable construction according to claim 1, characterized in that, The airbag is cylindrical, and the steel strand hole is provided through the airbag.

3. The borehole sealing device for borehole reamed anchor cable construction according to claim 1, characterized in that, The airbag is provided with two sealing brushes in a circumferential direction, and the two sealing brushes are spaced apart.

4. A borehole sealing device for borehole reamed anchor cable construction according to claim 3, characterized in that, The grease injection conduit is L-shaped, with one end protruding from one end of the airbag and the other end located between the two sealing brushes.

5. A borehole sealing device for borehole reamed anchor cable construction according to claim 1, characterized in that, The sealing brush includes a fixing ring, which is fitted around the airbag in the circumferential direction. A U-shaped groove is provided on one side of the fixing ring, and one end of the sealing brush is fixed in the U-shaped groove.

6. A borehole sealing device for borehole reamed anchor cable construction according to claim 5, characterized in that, Fasteners pass through the sidewall of the U-shaped groove to secure one end of the sealing brush to the retaining ring.

7. A borehole sealing device for borehole reamed anchor cable construction according to claim 5, characterized in that, The portion of the sealing brush extending beyond the U-shaped groove is bent outwards, and the sealing brush is a wire brush.

8. A borehole sealing device for borehole enlargement anchor cable construction according to claim 5, characterized in that, The airbag is provided with anti-slip texture in the circumferential direction, and the fixing ring is provided at the anti-slip texture of the airbag.

9. A borehole sealing device for borehole reamed anchor cable construction according to claim 1, characterized in that, One end of the inflation tube is exposed at one end of the airbag.

10. A borehole sealing device for borehole reamed anchor cable construction according to claim 1, characterized in that, The airbag has a groove at the opening, and a ring of ball bearings is provided in the groove.

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