Shield segment grouting hole plugging device and method

Abstract

The invention provides a shield segment grouting hole plugging device and method.The shield segment grouting hole plugging device comprises a fixing part, a connecting part and a plugging part, one end of the fixing part is connected with a grouting hole, and the other end of the fixing part is connected with the plugging part through the connecting part; the fixing part comprises a tensioning fixing unit and a reverse rotation fixing unit; the connecting part comprises a telescopic expansion unit and an auxiliary gasket unit; the plugging part comprises a reserved plugging unit; one end of the reverse rotation fixing unit is connected with the tensioning fixing unit, the other end of the reverse rotation fixing unit is connected with the reserved plugging unit through the telescopic expansion unit, and the auxiliary gasket unit is arranged on the peripheral side of the outer portion of the telescopic expansion unit. The blocking device is simple in structure, low in manufacturing cost, convenient to construct and good in blocking effect, the requirements of shield construction can be met to the maximum extent, and the shield construction efficiency and the engineering quality are improved.

Description

[Technical field]

[0001] The invention relates to the technical field of shield tunnel construction equipment, and in particular to a shield segment grouting hole blocking device and method. [Background technology]

[0002] The shield method has been widely used in modern tunnel construction due to its advantages such as high degree of automation and fast construction speed. The shield segment is the main support structure of the shield tunnel. It needs to be assembled in blocks and filled with crushed stone or grouting behind the segment wall to form a permanent support structure. The grouting hole is a reserved hole and needs to be blocked after filling to avoid leakage. In actual engineering, the blocking of the grouting hole is divided into temporary blocking and permanent blocking to meet the requirements of different construction sequences and working conditions.

[0003] In current shield construction, grouting hole plugging is a process that is prone to defects. The purpose of plugging is to avoid water leakage during long-term service. Since tunnels are generally long, there are many grouting holes that need to be plugged, and the tunnel service time is long, which greatly increases the plugging cost of the grouting holes in the entire tunnel and the probability of plugging defects. Plugging defects will cause leakage in the tunnel, which will not only reduce the stability of the support structure, but also affect the long-term service of the tunnel. Therefore, grouting hole plugging and plugging effect inspection have become a key process in current shield construction.

[0004] Therefore, it is necessary to study a shield segment grouting hole sealing device and method to address the deficiencies of the prior art and to solve or alleviate one or more of the above problems. [Summary of the invention]

[0005] In view of this, the present invention provides a shield segment grouting hole sealing device and method, which has a simple structure, low cost, convenient construction and good sealing effect, can meet the needs of shield construction to the greatest extent, and improve shield construction efficiency and project quality.

[0006] On the one hand, the present invention provides a shield segment grouting hole plugging device, the shield segment grouting hole plugging device comprises a fixing part, a connecting part and a plugging part, one end of the fixing part is connected to the grouting hole, and the other end is connected to the plugging part through the connecting part;

[0007] The fixing part includes a tension fixing unit and a reverse rotation fixing unit;

[0008] The connecting portion includes a telescopic expansion unit and an auxiliary gasket unit;

[0009] The blocking portion includes a reserved blocking unit;

[0010] One end of the anti-rotation fixing unit is connected to the tension fixing unit, and the other end is connected to the reserved blocking unit through the telescopic expansion unit, and the auxiliary gasket unit is arranged on the outer peripheral side of the telescopic expansion unit.

[0011] According to the aspects described above and any possible implementation method, an implementation method is further provided, wherein the tightening and fixing unit includes a tightening bolt, one end of the tightening bolt is provided with a thread, and the other end is provided with a boss, the threaded end of the tightening bolt is arranged on one side of the grouting hole, and the boss end is arranged on one side of the reserved plugging unit.

[0012] According to the above aspects and any possible implementation, an implementation is further provided, wherein the reverse rotation fixing unit is a reverse rotation fixing nut, and the reverse rotation fixing nut is sleeved on one end of the thread of the tensioning bolt.

[0013] According to the aspects described above and any possible implementation, an implementation is further provided, wherein the tightening and fixing unit also includes a tightening nut, the tightening nut is sleeved on one end of the thread of the tightening bolt, and the reverse rotation fixing nut is arranged between the tightening nut and the tightening bolt.

[0014] According to the above aspects and any possible implementation manner, there is further provided an implementation manner, wherein the telescopic expansion unit comprises an expansion rubber ring, and anti-slip protrusions are arranged on the outer side of the expansion rubber ring.

[0015] According to the above aspects and any possible implementation manner, an implementation manner is further provided, wherein the auxiliary gasket unit includes a plurality of gaskets, and the gaskets are arranged outside the expansion rubber ring.

[0016] According to the above aspects and any possible implementation, an implementation is further provided, wherein there are at least three washers, at least two of which are respectively arranged at the tightening nut and the boss.

[0017] According to the aspects described above and any possible implementation method, an implementation method is further provided, wherein the reserved sealing unit includes an expansion end, an inner groove and a pre-cracking cut, the outer diameter of the expansion end is not greater than the diameter of the grouting hole, the inner diameter is not less than the diameter of the tightening bolt, the number of the pre-cracking cuts is 8-16, and the depth of the pre-cracking cut is not greater than the depth of the inner groove.

[0018] According to the above aspects and any possible implementation, there is further provided an implementation, wherein the diameter of the protrusion is not greater than the diameter of the grouting hole, and the thickness of the protrusion is 10-20 mm.

[0019] According to the above aspects and any possible implementation, a shield segment grouting hole blocking method is further provided, wherein the blocking is achieved by the shield segment grouting hole blocking device, and the shield segment grouting hole blocking method specifically comprises:

[0020] Permanent plugging: The expansion end, gasket, expansion rubber ring and tension nut are installed on the tension bolt in sequence; the tension nut rotates, and the pre-splitting cut on the expansion end causes one side of the expansion end to gradually crack and expand outward. The expansion end is fixed to the rear side of the grouting hole wall of the segment. The expansion rubber ring expands radially under the action of axial tension and gradually adheres to the grouting hole wall to achieve anti-seepage. After reaching the predetermined tension, it is fixed with a reverse rotation fixing nut to achieve permanent plugging;

[0021] Temporary plugging: The expansion end, gasket, expansion rubber ring, tightening nut and counter-rotation fixing nut are installed on the tightening bolt in sequence, without installing the expansion end, to achieve temporary plugging.

[0022] Compared with the prior art, the present invention can achieve the following technical effects:

[0023] On the one hand, the device of the present invention has a simple structure and low cost; on the other hand, it adopts a split setting, which can meet the needs of different working conditions. Under the premise of ensuring the sealing quality, it greatly reduces the difficulty of operation and has broad application prospects.

[0024] Of course, any product implementing the present invention does not necessarily need to achieve all of the above-mentioned technical effects at the same time.

Brief Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, 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.

[0026] Figure 1 is a schematic diagram of the installation of a permanent plugging device provided by an embodiment of the present invention;

[0027] Figure 2 is a schematic diagram of the installation of a temporary blocking device provided by an embodiment of the present invention;

[0028] Figure 3 is a structural diagram of an expansion terminal provided by an embodiment of the present invention;

[0029] Figure 4 The present invention is a flowchart of a shield segment grouting hole plugging method according to an embodiment of the present invention.

[0030] Among them, in the figure:

[0031] 1- tension bolt; 2- thread; 3- convex head; 4- expansion end; 5- inner groove; 6- pre-splitting notch; 7- washer; 8- expansion rubber ring; 9- anti-slip convex point; 10- tension nut; 11- anti-rotation fixing nut. [Specific implementation method]

[0032] In order to better understand the technical solution of the present invention, the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0033] It should be clear that the described embodiments are only some embodiments of the present invention, not all 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.

[0034] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0035] The present invention provides a shield segment grouting hole plugging device, the shield segment grouting hole plugging device comprises a fixing part, a connecting part and a plugging part, one end of the fixing part is connected to the grouting hole, and the other end is connected to the plugging part through the connecting part;

[0036] The fixing part includes a tension fixing unit and a reverse rotation fixing unit;

[0037] The connecting portion includes a telescopic expansion unit and an auxiliary gasket unit;

[0038] The blocking portion includes a reserved blocking unit;

[0039] One end of the anti-rotation fixing unit is connected to the tension fixing unit, and the other end is connected to the reserved blocking unit through the telescopic expansion unit, and the auxiliary gasket unit is arranged on the outer peripheral side of the telescopic expansion unit.

[0040] In a specific embodiment, the tightening and fixing unit includes a tightening bolt, one end of which is provided with a thread and the other end is provided with a protrusion. The threaded end of the tightening bolt is arranged on one side of the grouting hole, and the protrusion end is arranged on one side of the reserved plugging unit.

[0041] In a specific embodiment, the reverse rotation fixing unit is a reverse rotation fixing nut, and the reverse rotation fixing nut is sleeved on one end of the thread of the tightening bolt.

[0042] In a specific embodiment, the tightening and fixing unit further includes a tightening nut, the tightening nut is sleeved on one end of a thread of a tightening bolt, and the reverse rotation fixing nut is arranged between the tightening nut and the tightening bolt.

[0043] In a specific embodiment, the telescopic expansion unit includes an expansion rubber ring, and anti-slip protrusions are provided on the outer side of the expansion rubber ring.

[0044] In a specific embodiment, the auxiliary gasket unit includes a plurality of gaskets, and the gaskets are arranged outside the expansion rubber ring.

[0045] In a specific embodiment, there are at least three washers, wherein at least two washers are respectively arranged at the tightening nut and the boss.

[0046] In a specific embodiment, the reserved sealing unit includes an expansion end, an inner groove and a pre-crack incision. The outer diameter of the expansion end is not greater than the diameter of the grouting hole, and the inner diameter is not less than the diameter of the tightening bolt. The number of the pre-crack incisions is 8-16, and the depth of the pre-crack incision is not greater than the depth of the inner groove.

[0047] In a specific embodiment, the diameter of the protrusion is not greater than the diameter of the grouting hole, and the thickness of the protrusion is 10-20 mm.

[0048] The present invention also provides a shield segment grouting hole blocking method, which is achieved by using the shield segment grouting hole blocking device. The shield segment grouting hole blocking method specifically includes:

[0049] Permanent plugging: The expansion end, gasket, expansion rubber ring and tension nut are installed on the tension bolt in sequence; the tension nut rotates, and the pre-splitting cut on the expansion end causes one side of the expansion end to gradually crack and expand outward. The expansion end is fixed to the rear side of the grouting hole wall of the segment. The expansion rubber ring expands radially under the action of axial tension and gradually adheres to the grouting hole wall to achieve anti-seepage. After reaching the predetermined tension, it is fixed with a reverse rotation fixing nut to achieve permanent plugging;

[0050] Temporary plugging: The expansion end, gasket, expansion rubber ring, tightening nut and counter-rotation fixing nut are installed on the tightening bolt in sequence, without installing the expansion end, to achieve temporary plugging.

[0051] Embodiment 1:

[0052] like Figure 1-Figure 3 As shown, the present invention provides a shield segment grouting hole plugging device, in which a tension bolt 1 has a thread 2 at one end and a convex head 3 at the other end; an expansion end 4 is provided with an inner groove 5 and a pre-splitting cut 6; and an expansion rubber ring 8 is provided with an anti-slip convex point 9 on the outside. The expansion end 4, the washer 7, the expansion rubber ring 8, the tension nut 10, and the reverse rotation fixing nut 11 are installed on the tension bolt 1 as required.

[0053] Among them, the tensioning bolt 1 has a thread 2 at one end and a convex head 3 at the other end. It is made of corrosion-resistant stainless steel. The diameter of the tensioning bolt 1 is 5mm-10mm and the length is 30cm-40cm. The diameter of the convex head 3 is slightly smaller than the diameter of the grouting hole and the thickness is 10-20mm, which can also be determined according to the actual situation on site. The surface is smooth and the angle is reasonable to facilitate the opening of the expansion end 4.

[0054] The expansion end 4 is provided with an inner groove 5 and a pre-crack cut 6, and is made of stainless steel; the outer diameter of the expansion end 4 is slightly smaller than the diameter of the grouting hole, the inner diameter is slightly larger than the diameter of the tensioning bolt 1, and the length is 10-20cm; the diameter of the inner groove 5 is about 5-15mm smaller than the outer diameter of the expansion end 4, and the depth is 2-3cm smaller than the length of the expansion end 4; the number of pre-crack cuts 6 is 8-16, and the depth is slightly smaller than the depth of the inner groove 5; the number of each structural dimension can also be determined according to the actual situation on site.

[0055] The outside of the expansion rubber ring 8 is provided with anti-skid protrusions 9, which are made of rubber; the inner diameter of the expansion rubber ring 8 is slightly larger than the diameter of the tension bolt 1, and the outer diameter is slightly smaller than the diameter of the grouting hole; the density of the anti-skid protrusions 9 is not less than 4 / cm 2 The size and quantity can also be determined according to the actual situation on site.

[0056] The expansion end 4, the washer 7, the expansion rubber ring 8, and the tensioning nut 10 are respectively installed on the tensioning bolt 1; as the tensioning nut 10 rotates, the pre-splitting cut 6 on the expansion end 4 causes one side of the expansion end 4 to gradually crack and expand outward, fixing the device on the rear side of the grouting hole wall of the pipe segment; the expansion rubber ring 8 expands radially under the action of axial tension, gradually clings to the grouting hole wall to achieve anti-seepage; after reaching the predetermined tension, the reverse rotation fixing nut 11 is used to fix it to achieve permanent plugging. Different effects can be achieved by using different combinations, such as temporary plugging when the expansion end 4 is not installed.

[0057] use Figure 4 In the process shown in the figure, during construction, first determine whether the construction condition is permanent or temporary blocking, and then follow Figure 1 or Figure 2 Assemble the plugging device and prepare the matching construction tools. After grouting or filling, press the device in and tighten the nut until the device is completely fixed in the grouting hole and the grouting hole no longer leaks. Then screw in the reverse rotation fixing nut to fix it, and finally check the stability. The size of each device should match the size of the grouting hole to ensure the plugging effect.

[0058] The specific construction process of the present invention is as follows:

[0059] 1. Construction preparation: After filling or grouting is completed, determine the size of each device according to the grouting hole size requirements, and prepare tools such as drills, wrenches, hammers, etc.;

[0060] 2. Determine the type of blocking: temporary blocking or permanent blocking;

[0061] 3 Assemble the plugging device: According to the working conditions, Figure 1 or Figure 2 Assembling the plugging device;

[0062] 4. Seal the grouting hole: remove the grouting pipe and grouting head, press in the sealing device, tighten the nut until the device is completely fixed in the grouting hole and the grouting hole no longer leaks, then screw in the reverse rotation fixing nut to fix it;

[0063] 5. Conduct stability check;

[0064] 6. Removal of temporary plugging: When the temporary plugging needs to be removed, remove the reverse rotation fixing nut and the tightening nut, and pull out the plugging device.

[0065] When permanent sealing is required, the expansion end, gasket, expansion rubber ring and tensioning nut are respectively installed on the tensioning bolt; as the tensioning nut rotates, the pre-cracked cut on the expansion end causes one side of the expansion end to gradually crack and expand outward, fixing the device on the rear side of the grouting hole wall of the pipe segment; the expansion rubber ring expands radially under the action of axial tension, gradually clings to the grouting hole wall to achieve anti-seepage; after reaching the predetermined tension, it is fixed with a reverse rotation fixing nut. When temporary sealing is required, only the expansion end needs to be removed. The device has a reasonable design, simple structure, low cost and convenient construction. It can maximize the sealing effect of the grouting hole and avoid leakage of the grouting hole. It can also be used for temporary and permanent sealing at the same time, and has broad application prospects.

[0066] The above is a detailed introduction to a shield segment grouting hole plugging device and method provided in the embodiment of the present application. The description of the above embodiment is only used to help understand the method and its core idea of ​​the present application; at the same time, for those skilled in the art, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

[0067] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different nouns to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of components as the criteria for distinction. As mentioned throughout the specification and claims, "including" and "comprising" are open-ended terms, so they should be interpreted as "including / including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve the technical problem within a certain error range and basically achieve the technical effect. The subsequent description of the specification is a preferred embodiment of the present application, but the description is for the purpose of illustrating the general principles of the present application, and is not used to limit the scope of the present application. The scope of protection of the present application shall be determined by the definition of the attached claims.

[0068] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a product or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such a product or system. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the product or system including the elements.

[0069] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0070] The above description shows and describes several preferred embodiments of the present application, but as mentioned above, it should be understood that the present application is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the application concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the present application, and should be within the scope of protection of the claims attached to the present application.

Claims

1. A shield segment grouting hole plugging device, characterized in that: The shield segment grouting hole plugging device comprises a fixing part, a connecting part and a plugging part, wherein one end of the fixing part is connected to the grouting hole, and the other end is connected to the plugging part through the connecting part; The fixing part includes a tension fixing unit and a reverse rotation fixing unit; The connecting portion includes a telescopic expansion unit and an auxiliary gasket unit; The blocking portion includes a reserved blocking unit; One end of the anti-rotation fixing unit is connected to the tension fixing unit, and the other end is connected to the reserved blocking unit through the telescopic expansion unit, and the auxiliary gasket unit is arranged on the outer peripheral side of the telescopic expansion unit.

2. The shield segment grouting hole plugging device according to claim 1, characterized in that: The tightening and fixing unit includes a tightening bolt, one end of which is provided with a thread, and the other end is provided with a convex head. The threaded end of the tightening bolt is arranged on one side of the grouting hole, and the convex head end is arranged on one side of the reserved plugging unit.

3. The shield segment grouting hole plugging device according to claim 2 is characterized in that: The reverse rotation fixing unit is a reverse rotation fixing nut, and the reverse rotation fixing nut is sleeved on one end of the thread of the tightening bolt.

4. The shield segment grouting hole plugging device according to claim 3 is characterized in that: The tightening and fixing unit also includes a tightening nut, which is sleeved on one end of the thread of the tightening bolt, and the reverse rotation fixing nut is arranged between the tightening nut and the tightening bolt.

5. The shield segment grouting hole plugging device according to claim 1, characterized in that: The telescopic expansion unit comprises an expansion rubber ring, and anti-slip convex points are arranged on the outer side of the expansion rubber ring.

6. The shield segment grouting hole plugging device according to claim 5, characterized in that: The auxiliary gasket unit includes a plurality of gaskets, and the gaskets are arranged outside the expansion rubber ring.

7. The shield segment grouting hole plugging device according to claims 4 and 6, characterized in that: There are at least three washers, among which at least two washers are respectively arranged at the tightening nut and the boss.

8. The shield segment grouting hole plugging device according to claim 2, characterized in that: The reserved plugging unit includes an expansion end, an inner groove and a pre-crack cut. The outer diameter of the expansion end is not greater than the diameter of the grouting hole, and the inner diameter is not less than the diameter of the tightening bolt. The number of the pre-crack cuts is 8-16, and the depth of the pre-crack cut is not greater than the depth of the inner groove.

9. The shield segment grouting hole plugging device according to claim 2, characterized in that: The diameter of the convex head is not greater than the diameter of the grouting hole, and the thickness of the convex head is 10-20 mm.

10. A method for plugging a grouting hole of a shield segment, wherein the plugging is achieved by using the shield segment grouting hole plugging device according to any one of claims 1 to 9, wherein: The shield segment grouting hole blocking method specifically comprises: Permanent plugging: The expansion end, gasket, expansion rubber ring and tension nut are installed on the tension bolt in sequence; the tension nut rotates, and the pre-splitting cut on the expansion end causes one side of the expansion end to gradually crack and expand outward. The expansion end is fixed to the rear side of the grouting hole wall of the segment. The expansion rubber ring expands radially under the action of axial tension and gradually adheres to the grouting hole wall to achieve anti-seepage. After reaching the predetermined tension, it is fixed with a reverse rotation fixing nut to achieve permanent plugging; Temporary plugging: The expansion end, gasket, expansion rubber ring, tightening nut and counter-rotation fixing nut are installed on the tightening bolt in sequence, without installing the expansion end, to achieve temporary plugging.

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