Shield segment grouting hole sealing device and method

Abstract

The application provides a shield segment grouting hole sealing device and method, the shield segment grouting hole sealing device includes fixed part, connecting part and sealing part, one end of the fixed part is connected with the grouting hole, the other end is connected with the sealing part through the connecting part, the fixed part includes tensioning fixed unit and reverse rotation fixed unit, the connecting part includes expansion unit and auxiliary gasket unit, the sealing part includes reserved sealing unit, one end of the reverse rotation fixed unit is connected with the tensioning fixed unit, the other end is connected with the reserved sealing unit through the expansion unit, and the auxiliary gasket unit is arranged on the outer circumferential side of the expansion unit, the application has simple structure, low cost, convenient construction and good sealing effect, can meet the demand of shield construction to the maximum extent, and improves the shield construction efficiency and engineering quality.

Description

Technical field

[0001] The present 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] Shield tunneling has been widely used in modern tunnel construction due to its advantages such as high automation and rapid construction speed. Shield segments, the primary support structure of shield tunnels, are assembled in sections and then filled with gravel or grouting behind the segments to form a permanent support structure. Grouting holes, as reserved holes, must be sealed after filling to prevent leakage. In actual projects, grouting hole sealing is divided into temporary and permanent sealing to meet the requirements of different construction sequences and working conditions.

[0003] In current shield construction, grouting hole plugging is a process prone to defects. The purpose of plugging is to prevent water leakage during long-term service. However, due to the generally long length of tunnels, the number of grouting holes that need to be plugged is large, and the tunnel's service life is long, the cost of plugging the grouting holes throughout the tunnel and the probability of plugging defects increase significantly. Plugging defects can cause leakage in the tunnel, which not only reduces the stability of the support structure but also affects the long-term service life of the tunnel. Therefore, grouting hole plugging and its effectiveness verification have become a key process in current shield construction.

[0004] Therefore, it is necessary to study a shield segment grouting hole blocking device and method to address the deficiencies of the existing technology 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] In one aspect, the present invention provides a shield segment grouting hole plugging device, the shield segment grouting hole plugging device comprising a fixing portion, a connecting portion and a plugging portion, wherein one end of the fixing portion is connected to the grouting hole, and the other end is connected to the plugging portion through the connecting portion;

[0007] The fixing portion 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 tensioning fixing unit, and the other end is connected to the reserved blocking unit through the telescopic expansion unit. The auxiliary gasket unit is arranged on the outer circumference 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 protrusion, the threaded end of the tightening bolt is provided on one side of the grouting hole, and the protrusion end is provided on one side of the reserved sealing unit.

[0012] According to the above aspects and any possible implementation manner, an implementation manner is further provided, wherein the anti-rotation fixing unit is an anti-rotation fixing nut, and the anti-rotation fixing nut is sleeved on one threaded end of the tightening bolt.

[0013] According to the above aspects and any possible implementation, an implementation is further provided, wherein 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 anti-rotation fixing nut is arranged between the tightening nut and the tightening bolt.

[0014] According to the above aspects and any possible implementation, there is further provided an implementation, wherein the telescopic expansion unit includes an expansion rubber ring, and anti-slip bumps are provided 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-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.

[0018] According to the above aspects and any possible implementation, an implementation is further provided, wherein 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.

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

[0020] Permanent sealing: The expansion end, washer, expansion rubber ring and tensioning nut are installed on the tensioning bolt in sequence. When the tensioning nut is rotated, the pre-cracked cut on the expansion end gradually cracks and expands outward on one side of the expansion end. The expansion end is fixed to the rear side of the grouting hole wall of the segment. Under the action of axial tension, the expansion rubber ring expands radially and gradually adheres to the grouting hole wall to achieve anti-seepage. After the predetermined tension is reached, the counter-rotating fixing nut is used to fix it to achieve permanent sealing.

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

[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. While 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 following briefly introduces the drawings required for use in the embodiments. 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 any creative work.

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

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

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

[0029] Figure 4 The present invention provides a flowchart for implementing a shield segment grouting hole blocking method according to an embodiment of the present invention.

[0030] Among them, in the figure:

[0031] 1-Tightening bolt; 2-Thread; 3-Protrusion; 4-Expansion end; 5-Inner groove; 6-Pre-crack notch; 7-Washer; 8-Expansion rubber ring; 9-Anti-slip bump; 10-Tightening nut; 11-Counter-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 understood that the embodiments described are only a portion of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art 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", "an", "the" 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 otherwise.

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

[0036] The fixing portion 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 tensioning fixing unit, and the other end is connected to the reserved blocking unit through the telescopic expansion unit. The auxiliary gasket unit is arranged on the outer circumference 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 provided on one side of the grouting hole, and the protrusion end is provided on one side of the reserved blocking unit.

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

[0047] In a specific embodiment, 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.

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

[0049] Permanent sealing: The expansion end, washer, expansion rubber ring and tensioning nut are installed on the tensioning bolt in sequence. When the tensioning nut is rotated, the pre-cracked cut on the expansion end gradually cracks and expands outward on one side of the expansion end. The expansion end is fixed to the rear side of the grouting hole wall of the segment. Under the action of axial tension, the expansion rubber ring expands radially and gradually adheres to the grouting hole wall to achieve anti-seepage. After the predetermined tension is reached, the counter-rotating fixing nut is used to fix it to achieve permanent sealing.

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

[0051] Example 1:

[0052] like Figure 1-Figure 3 As shown, the present invention provides a shield segment grouting hole sealing device. In this device, a tensioning bolt 1 has a thread 2 at one end and a protrusion 3 at the other end. An expansion end 4 has an inner groove 5 and a pre-split notch 6. An expansion rubber ring 8 has anti-slip bumps 9 on its outer side. The expansion end 4, washer 7, expansion rubber ring 8, tensioning nut 10, and counter-rotating fixing nut 11 are installed on the tensioning bolt 1 as needed.

[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 tightening bolt 1, and the length is 10-20 cm; the diameter of the inner groove 5 is about 5-15 mm smaller than the outer diameter of the expansion end 4, and the depth is 2-3 cm 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 quantity 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 , its size and quantity can also be determined by the actual situation on site.

[0056] The expansion tip 4, washer 7, expansion rubber ring 8, and tensioning nut 10 are installed on the tensioning bolt 1. As the tensioning nut 10 rotates, the pre-cracked notch 6 on the expansion tip 4 causes one side of the expansion tip 4 to gradually crack and expand outward, securing the device to the rear side of the grouting hole wall of the segment. Under the action of axial tension, the expansion rubber ring 8 expands radially, gradually clinging to the grouting hole wall to achieve anti-seepage. After reaching the predetermined tension, the reverse-rotation fixing nut 11 is used to secure the device, achieving permanent sealing. Different combinations can achieve different effects. For example, if the expansion tip 4 is not installed, a temporary seal can be achieved.

[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 corresponding construction tools. After grouting or filling is completed, press the device into the grouting hole and tighten the nut until the device is completely fixed in the grouting hole and the grouting hole stops leaking. Then screw in the counter-rotating fixing nut to secure it. Finally, check the stability. The dimensions of each device should match the dimensions 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 drill bits, wrenches, hammers, etc.

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

[0061] 3 Assemble the plugging device: According to the working conditions, Figure 1 or Figure 2 Assemble 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 secure 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 present invention installs the expansion end, the washer, the expansion rubber ring, and the tightening nut on the tightening bolt respectively; as the tightening 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 to 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 clinging 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, a simple structure, a low cost, and is easy to construct. 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 describes in detail a shield segment grouting hole plugging device and method provided in the embodiments of this application. The description of the above embodiments is only intended to help understand the method and core concept of this application; at the same time, for those skilled in the art, based on the concept of this application, there may be changes in the specific implementation method and application scope. In summary, the contents of this specification should not be understood as limiting this 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. For example, "including" and "comprising" mentioned throughout the specification and claims 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 problems within a certain error range and basically achieve the technical effects. The subsequent description in 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 as defined in the attached claims.

[0068] It should also be noted that the terms "include," "comprises," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a product or system comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such product or system. In the absence of further limitations, an element defined by the phrase "comprises a..." does not exclude the presence of other identical elements in the product or system comprising the element.

[0069] It should be understood that the term "and / or" as used herein is merely a description of the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0070] The above description shows and describes several preferred embodiments of the present application. However, as previously mentioned, it should be understood that the present application is not limited to the form disclosed herein and should not be construed as excluding other embodiments. Instead, the present application 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 technology or knowledge in the relevant field. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present application should be protected by the claims appended hereto.

Claims

1. A shield segment grouting hole blocking device, characterized in that: The shield segment grouting hole plugging device comprises a fixing portion, a connecting portion and a plugging portion, wherein one end of the fixing portion is connected to the grouting hole, and the other end is connected to the plugging portion through the connecting portion; The fixing portion 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 circumference of the telescopic expansion unit; 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 provided on one side of the grouting hole, and the convex head end is provided on one side of the reserved plugging unit; The anti-rotation fixing unit is an anti-rotation fixing nut, and the anti-rotation fixing nut is sleeved on one end of the thread of the tightening bolt; The tightening and fixing unit further comprises a tightening nut, the tightening nut being sleeved on one end of a thread of the tightening bolt, and the counter-rotating fixing nut being arranged between the tightening nut and the tightening bolt; The telescopic expansion unit includes an expansion rubber ring, and the outer side of the expansion rubber ring is provided with anti-slip bumps; The auxiliary gasket unit includes a plurality of gaskets, which are arranged outside the expansion rubber ring; There are at least three washers, at least two of which are respectively arranged at the tightening nut and the protruding head; 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.

2. The shield segment grouting hole blocking device according to claim 1, 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.

3. A method for blocking grouting holes of shield segments, wherein the blocking is achieved by the shield segment grouting hole blocking device according to any one of claims 1-2, characterized in that: The shield segment grouting hole blocking method specifically includes: Permanent sealing: The expansion end, washer, expansion rubber ring and tensioning nut are installed on the tensioning bolt in sequence. When the tensioning nut is rotated, the pre-cracked cut on the expansion end gradually cracks and expands outward on one side of the expansion end. The expansion end is fixed to the rear side of the grouting hole wall of the segment. Under the action of axial tension, the expansion rubber ring expands radially and gradually adheres to the grouting hole wall to achieve anti-seepage. After the predetermined tension is reached, the counter-rotating fixing nut is used to fix it to achieve permanent sealing. Temporary sealing: The expansion end, gasket, expansion rubber ring, tightening nut and counter-rotating fixing nut are installed on the tightening bolt in sequence without installing the expansion end to achieve temporary sealing.

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