Anti-seepage double-layer sleeve for anchor cable construction

Abstract

The utility model discloses an anti-leakage double-layer sleeve for anchor cable construction, which belongs to the technical field of anchor cable construction and comprises an inner sleeve and an outer sleeve sleeved outside the inner sleeve. The inner sleeve and the outer sleeve are each of a cylinder structure with the hollow interior and the two open ends. A gap exists between the inner sleeve and the outer sleeve, and a grouting pipe extending to a pipe opening of the outer sleeve is arranged in the gap; the hollow part in the grouting pipe is a first flow channel, and the hollow part in the gap is a second flow channel; pipe holes are formed in the wall of the outer sleeve; slurry flows into the first flow channel in the grouting pipe through the pipe opening of the grouting pipe, then flows into the second flow channel of the gap through the first flow channel, and finally flows into the gap between the outer sleeve and the anchor hole through the pipe hole. The utility model solves the technical problem of gushing and leakage of confined water when the pre-stressed anchor cable is put into an anchor hole, and realizes the technical effect of improving the production efficiency by grouting the bottom of a drill hole and blocking gushing water and gushing sand of a fine particle soil layer before a drill rod is dismounted.

Description

Technical Field

[0001] The utility model relates to the technical field of anchor cable construction, in particular to an anti-leakage double-layer casing for anchor cable construction. Background Art

[0002] During the excavation of foundation pits in gravel and sandy areas, there are many important buildings around the site, and the excavation depth usually reaches more than 20 meters. In order to ensure the safety of surrounding buildings, the foundation pit support adopts a water-stop curtain plus pile anchor support system to ensure that the groundwater level outside the foundation pit does not drop, resulting in a large water level difference inside and outside the foundation pit. In this way, when the rotary jet anchor cable is constructed below the water level, the groundwater will overflow from the hole, and the gushing water in the gravel layer will often bring gushing sand, seriously affecting the safety of the foundation pit;

[0003] Reference Figure 1 As shown, in the prior art, the prestressed anchor cable includes a free section 100 and an anchor section 200, wherein the free section 100 includes an anchor 1001 and an anchor plate 1002, and the anchor 1001 is fixedly connected to the anchor plate 1002 and then connected to a steel strand bundle 300 through an I-beam 1003, a grouting pipe 400 for filling slurry is provided at the center of the steel strand bundle 300, a wire rack 1004 is provided outside the steel strand bundle 300 of the free section 100, a clamping ring 2001 and a wire rack 1004 are provided outside the steel strand bundle 300 of the anchor section 200, and the clamping ring 2001 and the wire rack 1004 are arranged at intervals, and a guide cap 2002 is provided at the end of the anchor section 200 for collecting the steel strand bundle 300, the existing prestressed anchor cable is inconvenient to install when placed in the anchor hole, and the water-stop curtain will be destroyed during construction, thereby causing problems of pressurized water gushing and leakage, thereby affecting the construction. Utility Model Content

[0004] The purpose of the utility model is to provide a leakage-proof double-layer casing for anchor cable construction, so as to solve the problems existing in the background technology.

[0005] In order to achieve the above technical purpose, the technical solution adopted by the utility model is as follows: a double-layer anti-leakage casing for anchor cable construction, comprising:

[0006] An inner sleeve, and an outer sleeve sleeved outside the inner sleeve;

[0007] Wherein, the inner sleeve and the outer sleeve are both cylindrical structures with hollow interior and open ends;

[0008] There is a gap between the inner sleeve and the outer sleeve, and a grouting pipe extending to the pipe opening of the outer sleeve is arranged in the gap;

[0009] The hollow part in the grouting pipe is a first flow channel, and the hollow part in the gap is a second flow channel connected to the first flow channel;

[0010] The outer sleeve wall is provided with a plurality of tube holes penetrating the tube wall, and the second flow channel is communicated with the external anchor hole through the tube holes.

[0011] The slurry injected into the first flow channel is injected into the gap of the anchor hole through the first flow channel, the second flow channel and the tube hole in sequence to fill the wall of the anchor hole.

[0012] Optionally, a fixing component is provided between the outer sleeve and the inner sleeve, and the outer sleeve and the inner sleeve are connected via the fixing component.

[0013] Optionally, the fixing assembly includes a first hook, a second hook and a connecting rope;

[0014] Wherein, the first hook is arranged at the two end pipe openings of the inner wall of the outer sleeve, the second hook is arranged at the two end pipe openings of the outer wall of the inner sleeve, and the first hook is fixedly connected with the second hook by the connecting rope.

[0015] Optionally, a water blocking portion is provided at the pipe opening of the inner casing;

[0016] Wherein, the water blocking portion is provided with a drill rod hole, and an expansion water blocking ring matching the drill rod hole is provided outside the drill rod hole.

[0017] Optionally, the outer sleeve is made of steel material, and the inner sleeve is made of PVC material.

[0018] Optionally, the first hanging buckle and the second hanging buckle are both made of polymer materials.

[0019] By adopting the above technical solution, the utility model mainly has the following technical effects:

[0020] In the utility model, an inner casing and an outer casing are provided, and a pipe hole is opened in the wall of the outer casing. Before removing the drill rod, grouting is performed on the bottom of the borehole through the grouting hole so that the slurry flows out into the anchor hole. This can effectively block water and sand gushing from the fine-grained soil layer and improve construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the prestressed anchor cable structure in the background technology;

[0022] Figure 2 This is a schematic diagram of the top view of the structure of a double-layer anti-leakage casing for anchor cable construction according to the utility model;

[0023] Figure 3 This is a schematic diagram of the structure of a double-layer anti-leakage casing for anchor cable construction according to the utility model, viewed from above;

[0024] Figure 4It is a side view structural schematic diagram of a leakage-proof double-layer casing for anchor cable construction according to the utility model;

[0025] Figure 5 The utility model is a schematic diagram of the fixing component structure of a leakage-proof double-layer casing for anchor cable construction.

[0026] The meanings of the reference numerals are as follows:

[0027] 1. Inner casing; 2. Outer casing; 3. Gap; 4. Grouting pipe; 5. First flow channel; 6. Second flow channel; 7. Pipe hole; 8. Fixing assembly; 81. First hook; 82. Second hook; 83. Connecting rope; 9. Water blocking part; 91. Drill rod hole; 92. Expansion water blocking ring. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the specification of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0030] See also Figure 2-Figure 5 The utility model provides a double-layer anti-leakage casing for anchor cable construction. In practical application, it is used for preventing leakage of anchor holes during prestressed anchor cable construction in foundation pits in areas rich in sand and gravel containing water. It includes:

[0031] An inner sleeve 1, and an outer sleeve 2 sleeved outside the inner sleeve 1;

[0032] The inner casing 1 and the outer casing 2 are both cylindrical structures with a hollow interior and openings at both ends. The outer casing 2 is used to cover the inner casing 1, and the outer wall of the outer casing 2 is in contact with the anchor hole. The inner casing 1 is placed on the drill rod so as to be buried in the anchor hole at the same time as the drill rod goes deeper.

[0033] Further, the cross-sectional diameter of the inner casing 1 is smaller than the cross-sectional diameter of the outer casing 2, and there is a gap 3 between the inner casing 1 and the outer casing 2. The gap 3 is generated by the cross-sectional diameter difference between the inner casing 1 and the outer casing 2 when the inner casing 1 is inside the outer casing 2, and is a space for slurry to flow. A grouting pipe 4 extending to the pipe opening of the outer casing 2 is provided in the gap 3, and the grouting pipe 4 is movably arranged in the gap 3, and one end of the grouting pipe 4 is used for the inflow of slurry, and the other end is used for the outflow of slurry;

[0034] Furthermore, the hollow portion in the grouting pipe 4 is a first flow channel 5, and the hollow portion in the gap 3 is a second flow channel 6 connected to the first flow channel 5, and both the first flow channel 5 and the second flow channel 6 are used to allow the slurry to flow in the gap 3;

[0035] The outer casing 2 has a plurality of tube holes 7 penetrating the tube wall, and the second flow channel 6 is connected with the external anchor hole through the tube holes 7. The tube holes 7 are arranged in an array layer by layer on the outer casing 2, so that the slurry in the second flow channel 6 can flow out of the outer casing 2 evenly through the tube holes 7.

[0036] Furthermore, the slurry injected into the first flow channel 5 is injected into the gap of the anchor hole through the first flow channel 5, the second flow channel 6 and the tube hole 7 in sequence to fill the wall of the anchor hole.

[0037] The slurry flows into the first flow channel 5 in the grouting pipe 4 through the grouting pipe 4, and when the slurry flows into the mouth of the first flow channel 5, due to the pressure of the slurry itself, under the action of pressure, the slurry flows from the first flow channel 5 into the second flow channel 6 of the gap 3. When the second flow channel 6 is gradually filled with the slurry, the slurry can flow out through the pipe hole 7 to the gap between the outer sleeve 2 and the anchor hole, so that the slurry can gradually fill the anchor hole from the bottom of the anchor hole to the mouth of the anchor hole, thereby sealing the anchor hole wall.

[0038] In some embodiments, a fixing component 8 is provided between the outer sleeve 2 and the inner sleeve 1, and the outer sleeve 2 is connected to the inner sleeve 1 through the fixing component 8. The fixing component 8 is installed at the two end openings between the inner sleeve 1 and the outer sleeve 2 to form a relatively stable double sleeve structure, so that when the inner sleeve 1 moves, it can drive the outer sleeve 2 to be buried in the anchor hole at the same time and facilitate disassembly and assembly by the staff.

[0039] Furthermore, the fixing assembly 8 includes a first hook 81, a second hook 82 and a connecting rope 83; wherein, the first hook 81 is respectively fixedly arranged at the two end pipe openings of the inner wall of the outer sleeve 2, and the second hook 82 is respectively fixedly arranged at the two end pipe openings of the outer wall of the inner sleeve 1, and the first hook 81 and the second hook 82 have the same structure and one end of each is provided with a through hole. The connecting rope 83 connects the first hook 81 and the second hook 82 through the through hole, so that the two can be fixed, thereby fixing the inner sleeve 1 and the outer sleeve 2, and the connecting rope 83 can be made of steel wire or other materials.

[0040] In some embodiments, a water blocking portion 9 is provided at the mouth of the inner casing 1. The water blocking portion 9 is provided at one end of the inner casing 1 away from the bottom of the anchor hole. If water or sand appears at the mouth of the anchor hole, the water blocking portion 9 can be used to cover the mouth of the inner casing 1 to prevent water or slurry from escaping from the drill pipe.

[0041] Among them, the water blocking part 9 is provided with a drill rod hole 91, which is opened at the center of the water blocking part 9 and the hole size matches the drill rod actually used. An expansion water blocking ring 92 matching the drill rod hole 91 is provided on the outside of the drill rod hole 91. The material of the expansion water blocking ring 92 can be made of a polymer material that expands in water, such as chloroprene rubber, nitrile rubber, and EPDM rubber modified from cellulose or polyacrylamide.

[0042] Furthermore, the outer sleeve 2 is made of steel material, and the inner sleeve 1 is made of PVC material, which is used to enhance the strength and toughness of the sleeve.

[0043] Furthermore, the first hanging buckle 81 and the second hanging buckle 82 are both made of polymer materials, such as polypropylene (PP), polystyrene (PS) and nylon (PA66).

[0044] The utility model provides an anti-leakage double-layer casing for anchor cable construction. An inner casing 1 and an outer casing 2 are arranged, and a pipe hole 7 is opened in the pipe wall of the outer casing 2. A double-casing hole-making process is adopted to grout the bottom of the borehole through a grouting pipe 4 before removing the drill rod, so that the slurry flows out into the anchor hole through a first flow channel 5 and a second flow channel 6, which can well block water and sand gushing from fine-grained soil layers and improve construction efficiency.

[0045] Finally, it should be noted that the embodiments of the present invention disclose only preferred embodiments of the present invention, which are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A double-layer anti-leakage casing for anchor cable construction, characterized in that: include: An inner sleeve, and an outer sleeve sleeved outside the inner sleeve; Wherein, the inner sleeve and the outer sleeve are both cylindrical structures with hollow interior and open ends; There is a gap between the inner sleeve and the outer sleeve, and a grouting pipe extending to the pipe opening of the outer sleeve is arranged in the gap; The hollow part in the grouting pipe is a first flow channel, and the hollow part in the gap is a second flow channel connected to the first flow channel; The outer sleeve wall is provided with a plurality of tube holes penetrating the tube wall, and the second flow channel is connected with the external anchor hole through the tube holes; The slurry injected into the first flow channel is injected into the gap of the anchor hole through the first flow channel, the second flow channel and the tube hole in sequence to fill the wall of the anchor hole.

2. The anti-leakage double-layer casing for anchor cable construction according to claim 1 is characterized in that: A fixing assembly is provided between the outer sleeve and the inner sleeve, and the outer sleeve and the inner sleeve are connected via the fixing assembly.

3. The anti-leakage double-layer casing for anchor cable construction according to claim 2 is characterized in that: The fixing assembly includes a first hook, a second hook and a connecting rope; Wherein, the first hook is arranged at the two end pipe openings of the inner wall of the outer sleeve, the second hook is arranged at the two end pipe openings of the outer wall of the inner sleeve, and the first hook is fixedly connected with the second hook by the connecting rope.

4. The anti-leakage double-layer casing for anchor cable construction according to claim 1, characterized in that: A water blocking portion is provided at the pipe opening of the inner casing; Wherein, the water blocking portion is provided with a drill rod hole, and an expansion water blocking ring matching the drill rod hole is provided outside the drill rod hole.

5. The anti-leakage double-layer casing for anchor cable construction according to claim 1, characterized in that: The outer sleeve is made of steel material, and the inner sleeve is made of PVC material.

6. The anti-leakage double-layer casing for anchor cable construction according to claim 3, characterized in that: The first hanging buckle and the second hanging buckle are both made of polymer materials.

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