Single-hole grouting plug behind duct piece wall

Abstract

The utility model discloses a duct piece wall back single-hole grouting plug which comprises an inner through pipe arranged in a duct piece working hole, the inner through pipe is hollow, and a rubber sleeve, a steel sleeve and a fastening head are sequentially arranged on the inner through pipe from bottom to top. When grouting is conducted, the grouting plug is inserted into the duct piece working hole, the duct piece working hole is closed through the principle that large friction is generated between the expansion of the rubber sleeve and the hole wall of the duct piece working hole, the purpose that grout leakage and grout leakage are avoided under certain pressure is achieved, operation is easy, and the expanded grouting plug is not prone to falling off; and the rubber sleeve, the steel sleeve and the fastening head are matched to seal the duct piece working hole, the influence of the change of the thickness of the duct piece is avoided, the device can be repeatedly used, the construction cost is effectively reduced, and the applicability to tunnel duct piece lining grouting is high.

Description

Technical Field

[0001] This utility model belongs to the field of tunnel construction technology, and in particular relates to a single-hole grouting plug behind the tunnel segment wall. Background Technology

[0002] In current TBM construction, cement mortar needs to be injected within a 90° range of the formed bottom tunnel segment to quickly stabilize it. The remaining 270° range is then filled with gravel and backfilled with neat cement grout. Existing tunnel segment lining grouting plugs mostly use conventional plugs from building construction, mining, and underground construction. These plugs have drawbacks such as difficult operation, easy detachment, complex structure, and susceptibility to damage. They are poorly suited for tunnel segment lining grouting, especially when the segment thickness or working hole size changes, and cannot be reused. Utility Model Content

[0003] The technical problem to be solved by this utility model is to address the shortcomings of the prior art by providing a single-hole grouting plug behind the tunnel segment wall. By inserting this grouting plug into the working hole of the tunnel segment during grouting, the working hole is sealed by utilizing the principle of large friction generated by the expansion of the rubber sleeve against the hole wall of the tunnel segment. This achieves the purpose of preventing grout leakage under certain pressure. The operation is simple, and the grouting plug is not easy to fall off after expansion. Moreover, the use of the rubber sleeve, steel sleeve and fastening head to seal the working hole of the tunnel segment is not affected by changes in the thickness of the tunnel segment. It can be reused repeatedly, effectively reducing construction costs. It is highly applicable to tunnel segment lining grouting.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a single-hole grouting plug behind the tunnel segment wall, characterized in that: it includes an inner tube disposed in the working hole of the tunnel segment, the inner tube is hollow inside, and a rubber sleeve, a steel sleeve and a fastening head are arranged sequentially from bottom to top on the inner tube, the rubber sleeve, the steel sleeve and the fastening head are all fitted on the inner tube, and the rubber sleeve, the steel sleeve and the fastening head are all coaxially arranged with the inner tube;

[0005] The rubber sleeve is fitted onto the bottom of the inner tube, and steel gaskets are horizontally provided at both the top and bottom of the rubber sleeve.

[0006] The steel sleeve is vertically arranged on the top of the rubber sleeve, the diameter of the steel sleeve is not greater than the diameter of the rubber sleeve, and the bottom and top of the steel gasket of the steel sleeve are in close contact.

[0007] The fastening head is vertically positioned at the top of the steel sleeve. The diameter of the fastening head is larger than the diameter of the steel sleeve. The fastening head is threadedly connected to the inner tube, and the bottom of the fastening head is in contact with the top of the steel sleeve.

[0008] The above-mentioned single-hole grouting plug behind the pipe segment wall is characterized in that: the inner pipe has a four-section structure, the inner pipe includes a first inner pipe section, a second inner pipe section, a third inner pipe section and a fourth inner pipe section connected sequentially from bottom to top, the diameters of the first inner pipe section, the second inner pipe section and the third inner pipe section decrease sequentially, the diameters of the third inner pipe section and the fourth inner pipe section are equal, the first inner pipe section, the second inner pipe section, the third inner pipe section and the fourth inner pipe section are coaxially arranged; the interiors of the first inner pipe section, the second inner pipe section, the third inner pipe section and the fourth inner pipe section are all hollow and interconnected; a clamping plate is horizontally provided at the bottom of the first inner pipe section, and the first inner pipe section, the second inner pipe section, the third inner pipe section, the fourth inner pipe section and the clamping plate are integrally formed.

[0009] The above-mentioned single-hole grouting plug behind the pipe segment wall is characterized in that: the rubber sleeve is fitted below the first inner through pipe section, and the top surface of the steel gasket at the bottom of the rubber sleeve and the bottom surface of the clamping plate are in close contact; the steel sleeve is fitted above the first inner through pipe section; the fastening head is fitted on the second inner through pipe section, and the outer side of the second inner through pipe section is threaded; the outer side of the fourth inner through pipe section is threaded.

[0010] The above-mentioned single-hole grouting plug behind the pipe segment wall is characterized in that: a handle is provided on the outer side of the fastening head, and the fastening head and the handle are integrally formed.

[0011] The beneficial effects of this utility model are that by inserting the grouting plug into the working hole of the tunnel segment during grouting, the working hole is sealed by utilizing the principle of large friction generated by the expansion of the rubber sleeve against the hole wall, thus achieving the purpose of preventing grout leakage under certain pressure. The operation is simple, and the grouting plug is not easy to fall off after expansion. Moreover, the use of the rubber sleeve, steel sleeve and fastening head to seal the working hole of the tunnel segment is not affected by changes in the thickness of the tunnel segment, and can be reused repeatedly, effectively reducing construction costs. It is highly applicable to tunnel segment lining grouting.

[0012] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 This is a schematic diagram of the internal tube of this utility model.

[0015] Figure 3 This is a diagram showing the usage state of this utility model.

[0016] Explanation of reference numerals in the attached figures:

[0017] 1—Segment working hole; 2—Inner tube; 3—Rubber sleeve;

[0018] 4—Steel sleeve; 5—Fastening head; 6—Steel washer;

[0019] 7—Handle; 8—First internal pipe section; 9—Second internal pipe section;

[0020] 10—Third internal pipe section; 11—Fourth internal pipe section; 12—Modifying plate;

[0021] 13—Bottom segment. Detailed Implementation

[0022] like Figure 1 , Figure 2 and Figure 3 As shown, this utility model includes an inner tube 2 disposed in the working hole 1 of the tube segment. The inner tube 2 is hollow inside. A rubber sleeve 3, a steel sleeve 4 and a fastening head 5 are arranged sequentially from bottom to top on the inner tube 2. The rubber sleeve 3, the steel sleeve 4 and the fastening head 5 are all fitted on the inner tube 2, and the rubber sleeve 3, the steel sleeve 4 and the fastening head 5 are all coaxially arranged with the inner tube 2.

[0023] The rubber sleeve 3 is fitted onto the bottom of the inner tube 2, and steel gaskets 6 are horizontally provided at both the top and bottom of the rubber sleeve 3.

[0024] The steel sleeve 4 is vertically arranged on the top of the rubber sleeve 3. The diameter of the steel sleeve 4 is not greater than the diameter of the rubber sleeve 3. The bottom of the steel sleeve 4 and the top of the steel gasket 6 are in close contact.

[0025] The fastening head 5 is vertically positioned on the top of the steel sleeve 4. The diameter of the fastening head 5 is larger than the diameter of the steel sleeve 4. The fastening head 5 is threadedly connected to the inner tube 2. The bottom of the fastening head 5 is in contact with the top of the steel sleeve 4.

[0026] In actual use, the grouting plug is inserted into the working hole 1 of the tunnel segment during grouting. The working hole 1 is sealed by the principle of large friction generated by the expansion of the rubber sleeve 3 against the hole wall of the tunnel segment working hole 1, so as to achieve the purpose of preventing grout leakage under a certain pressure. The operation is simple and the grouting plug is not easy to fall off after expansion. Moreover, the use of the rubber sleeve 3, steel sleeve 4 and fastening head 5 to seal the working hole 1 of the tunnel segment is not affected by the change of tunnel segment thickness. It can be reused repeatedly, effectively reducing construction costs. It is highly applicable to tunnel segment lining grouting.

[0027] It should be noted that the inner tube 2 is the main body of the grouting plug, and the grout is injected through the tube to achieve the construction purpose. The rubber sleeve 3 is an important component of the grouting plug. The rubber sleeve 3 has good deformation capacity. After being connected to the working hole 1 of the pipe segment, it is deformed and expanded by the fastening head 5, supporting the inner wall of the working hole 1 of the pipe segment and fixing the grouting plug as a whole. The steel gasket 6 provides a fixing and protection function for the rubber sleeve 3. The steel sleeve 4 is installed between the fastening head 5 and the rubber sleeve 3 to transmit the pressure of rotating the fastening head 5. The steel sleeve 4 has a small thickness, which helps to reduce the resistance encountered by the fastening head 5 when rotating. The fastening head 5 is installed at the thread of the second inner tube section 9. By rotating the fastening head 5, the rubber sleeve 3 is squeezed and deformed and expanded.

[0028] In particular, the main body of this grouting plug is made of steel, making it resistant to damage. The components of this grouting plug—inner tube 2, rubber sleeve 3, steel sleeve 4, fastening head 5, steel gasket 6, and handle 7—are made from readily available and durable raw materials. This grouting plug can be quickly fixed and disassembled during grouting using the fastening head 5, ensuring efficient and rapid construction. The rubber sleeve 3 is easy to replace when damaged, resulting in high efficiency.

[0029] like Figure 2 As shown, in this embodiment, the inner tube 2 has a four-segment structure. The inner tube 2 includes a first inner tube segment 8, a second inner tube segment 9, a third inner tube segment 10, and a fourth inner tube segment 11 connected sequentially from bottom to top. The diameters of the first inner tube segment 8, the second inner tube segment 9, and the third inner tube segment 10 decrease sequentially. The diameters of the third inner tube segment 10 and the fourth inner tube segment 11 are equal. The first inner tube segment 8, the second inner tube segment 9, the third inner tube segment 10, and the fourth inner tube segment 11 are coaxially arranged. The interiors of the first inner tube segment 8, the second inner tube segment 9, the third inner tube segment 10, and the fourth inner tube segment 11 are all hollow and interconnected. A mounting plate 12 is horizontally arranged at the bottom of the first inner tube segment 8. The first inner tube segment 8, the second inner tube segment 9, the third inner tube segment 10, the fourth inner tube segment 11, and the mounting plate 12 are integrally formed.

[0030] In actual use, in order to ensure normal grouting and installation, the mounting plate 12 and the steel gasket 6 are both provided with holes that communicate with the inside of the inner tube 2.

[0031] like Figure 1 As shown, in this embodiment, the rubber sleeve 3 is fitted below the first inner through pipe section 8, and the top surface of the steel gasket 6 at the bottom of the rubber sleeve 3 is in close contact with the bottom surface of the clamping plate 12; the steel sleeve 4 is fitted above the first inner through pipe section 8; the fastening head 5 is fitted on the second inner through pipe section 9, and the outer side of the second inner through pipe section 9 is threaded; the outer side of the fourth inner through pipe section 11 is threaded.

[0032] In actual use, it is connected to the grouting pipe through the thread on the outer side of the fourth inner pipe section 11.

[0033] like Figure 1 As shown, in this embodiment, a handle 7 is provided on the outer side of the fastening head 5, and the fastening head 5 and the handle 7 are integrally formed.

[0034] In actual use, the handle 7 is welded to both sides of the fastening head 5, which facilitates the rotation of the fastening head 5.

[0035] When using this utility model, such as Figure 3 As shown, M15 cement mortar is injected within a 90° range of the bottom segment 13. The cement mortar injection system for the bottom segment 13 is mounted on a rear-mounted trailer and consists of a cement mortar mixing machine and a grouting pump. The grouting plug injects grout between the bottom segment 13 and the surrounding rock. Before grouting, the grouting plug is installed on the working hole 1 of the segment, and the fixing head 5 is tightened to expand the rubber sleeve 3, ensuring a tight fit with the hole wall of the working hole 1 and achieving a stable state. Simultaneously, the grouting fluid is prepared. After the grouting fluid is prepared, the grouting pipe is connected to the grouting plug, and grouting is performed. The grouting pipe and the grouting plug are mechanically threaded together, and a valve is installed at the connection point for grout sealing. After the grouting standard is met, the valve between the grouting pipe and the grouting plug is tightly closed, and the grouting pipe is disassembled. When the grout reaches initial setting, loosen the fastening head 5 to cause the rubber sleeve 3 to shrink, creating a gap between it and the working hole 1 of the segment. Then, pull out the grouting plug.

[0036] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the present utility model. Any simple modifications, alterations, or equivalent structural changes made to the above embodiments based on the technical essence of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A pipe segment wall back single-hole grouting plug, characterized in that: The utility model provides a pipe segment working hole (1) is provided with inner through pipe (2) in, the inside hollow of inner through pipe (2), the rubber sleeve (3), steel sleeve (4) and fastening head (5) are sequentially arranged from bottom to top on inner through pipe (2), the rubber sleeve (3), steel sleeve (4) and fastening head (5) are all sleeved on inner through pipe (2), and the rubber sleeve (3), steel sleeve (4) and fastening head (5) all with inner through pipe (2) coaxial arrangement; The rubber sleeve (3) is sleeved on the bottom of the inner through pipe (2), and the top and bottom of the rubber sleeve (3) are both provided with a steel gasket (6) horizontally; The steel sleeve (4) is vertically arranged on the top of the rubber sleeve (3), the diameter of the steel sleeve (4) is not greater than the diameter of the rubber sleeve (3), and the top of the steel gasket (6) at the bottom and top of the steel sleeve (4) is tightly attached; The fastening head (5) is vertically arranged on the top of the steel sleeve (4), the diameter of the fastening head (5) is greater than the diameter of the steel sleeve (4), the fastening head (5) is threadedly connected with the inner through pipe (2), and the bottom of the fastening head (5) is attached to the top of the steel sleeve (4).

2. A pipe segment wall behind a single-hole grouting plug according to claim 1, characterized in that: The inner through pipe (2) is a four-segment structure, the inner through pipe (2) comprises a first inner through pipe segment (8), a second inner through pipe segment (9), a third inner through pipe segment (10) and a fourth inner through pipe segment (11) sequentially connected from bottom to top, the diameter of the first inner through pipe segment (8), the diameter of the second inner through pipe segment (9) and the diameter of the third inner through pipe segment (10) decrease in turn, the diameter of the third inner through pipe segment (10) is equal to the diameter of the fourth inner through pipe segment (11), and the first inner through pipe segment (8), the second inner through pipe segment (9), the third inner through pipe segment (10) and the fourth inner through pipe segment (11) are coaxially arranged; the interiors of the first inner through pipe segment (8), the second inner through pipe segment (9), the third inner through pipe segment (10) and the fourth inner through pipe segment (11) are hollow and connected in communication; the bottom of the first inner through pipe segment (8) is horizontally provided with a clamping plate (12), and the first inner through pipe segment (8), the second inner through pipe segment (9), the third inner through pipe segment (10), the fourth inner through pipe segment (11) and the clamping plate (12) are integrally formed.

3. A pipe segment wall behind a single-hole grouting plug according to claim 2, characterized in that: The rubber sleeve (3) is sleeved below the first inner through pipe segment (8), the top surface of the steel gasket (6) at the bottom of the rubber sleeve (3) is tightly attached to the bottom surface of the clamping plate (12); the steel sleeve (4) is sleeved above the first inner through pipe segment (8); the fastening head (5) is sleeved on the second inner through pipe segment (9), and threads are formed on the outer side surface of the second inner through pipe segment (9); threads are formed on the outer side surface of the fourth inner through pipe segment (11).

4. The tubular segment wall behind single-hole grouting plug according to claim 1, characterized in that: A handle (7) is arranged on the outer side surface of the fastening head (5), and the fastening head (5) and the handle (7) are integrally formed.

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