Pre-tensioning reinforcement device and method for tunnels or mines

Abstract

The application provides a pre-tightening reinforcement device and method for a tunnel or a mine shaft, and relates to the field of engineering construction. The pre-tightening reinforcement device for the tunnel or the mine shaft comprises a plurality of support members and at least one pre-tightening mechanism; the plurality of support members are connected in sequence, and the plurality of support members are used for supporting a to-be-reinforced member; the pre-tightening mechanism is connected with two adjacent support members, and the pre-tightening mechanism can apply adjustable pre-tightening force to the two adjacent support members. The application can provide support force to the to-be-reinforced member between the deformation of the pipe piece and the to-be-reinforced member, and improve the reinforcement effect of the pre-tightening reinforcement device.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of engineering construction, and in particular to a pre-tightening reinforcement device and a reinforcement method for a tunnel or a mine. BACKGROUND

[0002] Currently, in the process of tunnel construction, prefabricated concrete segments are usually gradually installed around the tunnel during mechanical propulsion to reduce the possibility of tunnel collapse. The segment is a permanent lining structure, serving as the innermost (or outermost) barrier of the tunnel and playing a core role in resisting soil pressure, groundwater pressure, engineering load and accidental load. The quality of the segment is directly related to the overall safety, waterproof performance and durability of the tunnel.

[0003] When external loads are continuously applied, the cross section of the segment will change from a circular shape to an elliptical shape, at which time the original bearing capacity will decrease, causing the segment to deform and thus creating a certain safety hazard. For deformed segments, a post-reinforcement method can be used for repair and reinforcement, for example, a chemical anchor rod can be used to connect the reinforcement material body to the segment, so that the reinforcement material body is suspended on the inner arc surface of the segment, and when the segment deforms again, the reinforcement material body can bear the segment.

[0004] However, this repair and reinforcement method not only increases the load on the already deformed segment, but also does not significantly improve the bearing capacity of the segment after the initial installation of the reinforcement material body. Furthermore, for reinforcement objects without segment structures, such as mine inner walls, directly setting a reinforcement material body to support also has the problem of unclear reinforcement effect. SUMMARY

[0005] The present application provides a pre-tightening reinforcement device and a reinforcement method for a tunnel or a mine to solve the problem.

[0006] The pre-tightening reinforcement device for a tunnel or a mine provided by the present application embodiment comprises a plurality of support members and at least one pre-tightening mechanism.

[0007] The plurality of support members are connected in sequence, and the plurality of support members are used to support the reinforcement object.

[0008] The pre-tightening mechanism connects two adjacent support members, and the pre-tightening mechanism can apply adjustable pre-tightening force to the two adjacent support members.

[0009] By adopting the above technical solution, the pre-tightening reinforcement device comprises a plurality of support members and at least one pre-tightening mechanism; the plurality of support members are connected in sequence, and the plurality of support members are used to support the reinforcement object. The pre-tightening mechanism connects two adjacent support members, and the pre-tightening mechanism can apply adjustable pre-tightening force to the two adjacent support members, so that the support member and the pre-tightening mechanism can cooperate to provide support to the reinforcement object.

[0010] In the related art, the maintenance and reinforcement method not only adds a load to the deformed segment, but also does not significantly improve the bearing capacity of the segment after the initial installation of the reinforcement material body. For example, the reinforcement material body can only bear the segment when the segment is deformed again, which makes the support effect of the reinforcement material body on the segment poor, and the reinforcement material body mainly replaces the segment to provide bearing capacity to the tunnel.

[0011] In the embodiments of the present application, the pre-tightening mechanism provides a pre-tightening force to the adjacent two support members, which not only improves the support effect of the support member on the reinforcement object, but also enables the pre-tightening mechanism to provide bearing capacity to the inner wall of the tunnel together with the reinforcement object, and enables the support member to have a support effect more quickly, so that the support force can be provided to the reinforcement object between the deformation of the segment and the like, and the reinforcement effect of the pre-tightening reinforcement device is further improved.

[0012] In some possible embodiments, the pre-tightening mechanism includes a bolt and a nut matched with each other;

[0013] The bolt is arranged in the support member, and the nut is threadedly connected with the bolt, and the nut can apply a force to the support member.

[0014] In some possible embodiments, the plurality of support members includes a first support member and a second support member, and the pre-tightening mechanism is connected with the first support member and the second support member;

[0015] The bolt includes opposite first and second end portions, the first end portion is connected with the first support member, and the second end portion is connected with the second support member;

[0016] The number of the nuts is plural, and the plurality of nuts includes a first nut and a second nut;

[0017] The first nut is threadedly connected with the first end portion, and the first nut can apply a force to the first support member away from the second support member; and the second nut is threadedly connected with the second end portion, and the second nut can apply a force to the second support member away from the first support member.

[0018] In some possible embodiments, the first support member and the second support member have a gap therebetween;

[0019] Between the first support member and the second support member, the number of the pre-tightening mechanisms is plural, and the plurality of bolts are sequentially and spacedly arranged, and at least part of the bolts is located in the gap.

[0020] In some possible embodiments, the support member includes a body and a connecting end face;

[0021] The connecting end face has a first end face and a second end face connected to each other, the first end face is located at the end of the body, and the second end face is located at the side of the body;

[0022] The bolt is arranged in the first end face and is threadedly connected with the first end face, and the extension direction of the bolt is arranged perpendicularly to the first end face.

[0023] In some possible embodiments, the connecting end face is provided with a pin;

[0024] The pin is arranged in the second end face and the body, and the connecting end face is fixed with the body through the pin.

[0025] In some possible embodiments, the support is provided with a chemical anchor, and the support can be fixedly connected with the reinforced part through the chemical anchor.

[0026] In some possible embodiments, the support is provided with a plurality of reinforcing ribs, and the reinforcing ribs are arranged in sequence and in intervals, and a connecting channel is arranged between adjacent two reinforcing ribs.

[0027] Between adjacent two supports, at least part of the bolt is located in the connecting channel of one of the supports, and at least part of the bolt is located in the connecting channel of the other support.

[0028] In some possible embodiments, a connecting piece is further included, and the connecting piece is used to connect adjacent two supports.

[0029] The support includes a first end and a second end arranged oppositely;

[0030] The first end of the support is provided with the pre-tightening mechanism, the second end of the support is provided with the connecting piece, and the second end of the support is not provided with the pre-tightening mechanism.

[0031] Embodiments of the present application provide a pre-tightening force reinforcing method for a tunnel or a mine, which comprises the following steps:

[0032] A plurality of supports are provided, and the supports are connected in sequence, and at least two adjacent supports have a pre-tightening mechanism therebetween;

[0033] A plurality of supports are arranged on the reinforced part, and the supports support the reinforced part;

[0034] The pre-tightening mechanism is adjusted to adjust the pre-tightening force applied by the pre-tightening mechanism to adjacent two supports, so that the supports are tightly abutted against the reinforced part. BRIEF DESCRIPTION OF DRAWINGS

[0035] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0036] Figure 1 A perspective view of the preload reinforcement device provided in the embodiments of this application;

[0037] Figure 2 A schematic diagram of the preload reinforcement device provided in the embodiments of this application;

[0038] Figure 3 for Figure 2 Sectional view at point AA;

[0039] Figure 4 A schematic diagram of the support component provided in an embodiment of this application;

[0040] Figure 5 for Figure 4 Sectional view at point BB;

[0041] Figure 6 This is a schematic diagram illustrating the cooperation between the support member and the pre-tightening mechanism according to an embodiment of this application;

[0042] Figure 7 This is a schematic diagram showing the connection between two support members according to an embodiment of this application;

[0043] Figure 8 A schematic diagram of the support component provided in an embodiment of this application;

[0044] Figure 9 A schematic diagram of the preload reinforcement device provided in the embodiments of this application;

[0045] Figure 10 for Figure 9 Sectional view at the center CC;

[0046] Figure 11 This is a schematic diagram of the connection between two support members according to an embodiment of this application.

[0047] Explanation of reference numerals in the attached figures:

[0048] 100. Segment; 101. Mounting groove; 102. Inner wall;

[0049] 1. Support component; 11. Body; 12. Reinforcing rib; 121. Anti-loosening through hole; 122. First reinforcing rib; 123. Second reinforcing rib; 124. First connecting channel; 125. Second connecting channel; 13. First support component; 14. Second support component;

[0050] 2. Bolt; 21. Nut;

[0051] 3. Gap; 31. First end; 32. Second end;

[0052] 4. Connection end face; 41. First end face; 42. Second end face;

[0053] 5. Pin;

[0054] 6. Steel bonding glue;

[0055] 7. Edge sealing strip;

[0056] 8. Chemical anchor; 81. Anchor nut;

[0057] 9. Connector;

[0058] 10. Support bracket.

[0059] The specific embodiments of the present application have been shown by the above drawings, and will be described in more detail hereinafter. These drawings and written descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0060] As described in the background, in the current tunnel construction, prefabricated concrete segments are usually installed around the tunnel during mechanical propulsion to reduce the possibility of tunnel collapse. The segment is a permanent lining structure, which serves as the innermost (or outermost) barrier of the tunnel and plays a core role in resisting soil pressure, groundwater pressure, engineering load and accidental load. The quality of the segment is directly related to the overall safety, waterproof performance and durability of the tunnel.

[0061] When the external load is continuously applied, the transverse section of the segment will change from a circular shape to an elliptical shape, at which time the original bearing capacity will decrease, causing the segment to deform and thus causing certain safety hazards. The deformed segment can be repaired and reinforced by a post-reinforcement method, for example, a chemical anchor can be used to connect the reinforcement material body to the segment, so that the reinforcement material body is suspended on the inner arc surface of the segment, and when the segment deforms again, the reinforcement material body can bear the segment.

[0062] For example, the deformed segment is generally repaired and reinforced by a post-reinforcement method, and the existing reinforcement methods mainly include the following:

[0063] 1. A 20-30 mm thick steel plate is added to the inner arc surface of the original segment, and the steel plate for strengthening the bearing capacity of the segment needs to be butt welded on site, and the steel plate needs to be installed after the tunnel internal pipeline is first disassembled, which is time-consuming, labor-intensive and material-consuming.

[0064] 2. An aluminum alloy assembly type reinforced composite component, the reinforcing method uses splicing combination without electric welding, light weight and easy installation, but the aluminum alloy fire resistance time and temperature do not meet the fire resistance grade requirements of the building tunnel.

[0065] 3. A composite cavity grouting type reinforced component, the method uses splicing combination without electric welding, light weight and easy installation, but when the composite cavity is injected with cement mortar, it is difficult to clean up and the mortar needs more than 48 hours to reach the bearing strength, the reinforced bearing capacity function is slow to realize, the composite cavity material needs to be wrapped with carbon fiber cloth and basalt fiber cloth on the outer surface to increase the overall strength and prevent stray current corrosion, the process is complex and the outer wrapping material has the risk of falling off during operation.

[0066] However, this maintenance and reinforcement method not only increases the load on the already deformed segment, but also does not significantly improve the bearing capacity of the segment after the initial installation of the reinforcing material body. Moreover, for the reinforcement of the inner wall of the mine and other reinforcement objects without segment structure, directly setting the reinforcing material body to support also has the problem of poor reinforcement effect.

[0067] To solve the above technical problems, the embodiments of the present application provide a pre-tightening force reinforcing device and method for a tunnel or mine, the pre-tightening force reinforcing device comprising a plurality of support members and at least one pre-tightening mechanism; the plurality of support members are connected in sequence, and the plurality of support members are used to support a reinforcement object. The pre-tightening mechanism connects two adjacent support members, and the pre-tightening mechanism can apply an adjustable pre-tightening force to the two adjacent support members, so that the support members and the pre-tightening mechanism can cooperate to provide support to the reinforcement object.

[0068] In the related art, the maintenance and reinforcement method not only increases the load on the already deformed segment, but also does not significantly improve the bearing capacity of the segment after the initial installation of the reinforcing material body. For example, the reinforcing material body can only bear the segment when the segment deforms again, which makes the support effect of the reinforcing material body on the segment poor, and the reinforcing material body mainly replaces the segment to provide bearing capacity to the tunnel.

[0069] In the embodiments of the present application, the pre-tightening mechanism provides a pre-tightening force to the two adjacent support members, which not only improves the support effect of the support members on the reinforcement object, but also enables the pre-tightening mechanism to provide bearing capacity to the inner wall of the tunnel together with the reinforcement object, and the pre-tightening mechanism can make the support members have a support effect faster, so that the pre-tightening force reinforcing device can provide support to the reinforcement object between the deformation of the segment and other reinforcement objects, and further improve the reinforcement effect of the pre-tightening force reinforcing device.

[0070] The exemplary embodiments will be described in detail herein with reference to the attached drawings. The description of the exemplary embodiments is intended to apply to any embodiment of the application, unless specified otherwise. It should be understood that the following description is not meant to limit the application or the appended claims in any way.

[0071] The technical solutions of the present application and how the technical solutions solve the above technical problems will be described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of the present application will be described below with reference to the accompanying drawings.

[0072] The pre-tightening reinforcement device for tunnels or mines provided by the embodiments of the present application can be applied to shield tunnels and mine roadways, etc., wherein the shield tunnels include nuclear power tunnels, railway tunnels, highway tunnels, pipe gallery tunnels, rail transit tunnels, etc., and the mine roadways include mine tunnels, coal tunnels, etc.

[0073] With reference to Figure 1 and Figure 2 The pre-tightening reinforcement device is mainly used for reinforcing the to-be-reinforced member, which can be in various forms. For shield tunnels, the to-be-reinforced member can be a segment 100 of the shield tunnel, and the pre-tightening reinforcement device can be arranged around the circumference of the segment 100, so as to support the segment 100 of the shield tunnel through the pre-tightening reinforcement device.

[0074] For mine roadways, the to-be-reinforced member can be an inner wall 102 of the mine roadway, and the pre-tightening reinforcement device can be directly arranged around the inner wall 102 of the mine roadway, so as to support the inner wall 102 of the mine roadway through the pre-tightening reinforcement device.

[0075] The pre-tightening reinforcement device for tunnels or mines includes a plurality of support members 1 and at least one pre-tightening mechanism. The plurality of support members 1 are connected in sequence, and the plurality of support members 1 can be used to support the to-be-reinforced member.

[0076] When the segment 100 (to-be-reinforced member) is supported by the pre-tightening reinforcement device, the plurality of support members 1 can be arranged on the inner side of the segment 100, and the support member 1 can be used to abut against the inner wall 102 of the segment 100. When the inner wall 102 (to-be-reinforced member) of the mine roadway is supported by the pre-tightening reinforcement device, the plurality of support members 1 can directly abut against the inner wall 102 of the mine roadway.

[0077] The pre-tightening mechanism can be connected to two adjacent support members 1, and can apply adjustable pre-tightening force to the two adjacent support members 1. The pre-tightening mechanism can also make the support members 1 have a supporting effect more quickly, so that the support force can be provided to the reinforcement object between the time when the reinforcement object is waiting for deformation, thereby further improving the reinforcement effect of the pre-tightening reinforcement device.

[0078] With reference to Figure 3 and Figure 4 In some possible embodiments, the support member 1 can be provided with a chemical anchor 8, and the support member 1 can be fixedly connected to the reinforcement object through the chemical anchor 8 and an anchor nut 81, so that the connection between the support member 1 and the reinforcement object is more stable.

[0079] With reference to Figure 5 and Figure 6 For example, the support member 1 has a body 11 and a plurality of reinforcing ribs 12 extending outward from the body 11, and the shape of the support member 1 is similar to a “mountain” shape. Each support member 1 can include three reinforcing ribs 12, which can strengthen the overall supporting force of the support member 1.

[0080] The body 11 can be connected to the inner wall 102 of the segment 100, the reinforcing ribs 12 can be directed toward the center of the segment 100, and two adjacent support members 1 can be connected through a pre-tightening mechanism. The segment 100 can be provided as an arc-shaped segment 100, for example, the segment 100 has a shape of a part of a circle, and the center here refers to the center of the circle.

[0081] Alternatively, the support member 1 can also be connected to the segment 100 in other ways. For example, steel adhesive 6 can be applied between the body 11 and the inner wall 102 of the segment 100, so that the connection between the two is more compact. The two sides of the support member 1 can also be provided with edge sealing strips 7, which are used to protect the steel adhesive 6, prevent the steel adhesive 6 from leaking, save materials, and prolong the service life.

[0082] For example, the support member 1 can be provided with a support bracket 10. The support bracket 10 can be fixedly connected to the support member 1, and the support bracket 10 is provided to support and protect the support member 1. The number of support members 1 located on the inner wall 102 of the segment 100 can be multiple, and each support member 1 at the bottom of the segment 100 is fixedly connected to a support bracket 10. Two oppositely arranged support brackets 10 have a passage for the tunnel to pass through.

[0083] For example, the segment 100 of the shield tunnel can be provided with a mounting groove 101, and the support member 1 is arranged in the mounting groove 101, that is, the pre-tightening reinforcement device is pre-buried in the segment 100. This kind of mode can be applied to the reinforcement of a new segment 100.

[0084] With reference to Figure 7and Figure 8 In some possible implementations, the preload reinforcement device may also include a connector 9. The connector 9 can be used to connect two adjacent support members 1 to make the connection between the two adjacent support members 1 more stable.

[0085] The support member 1 may include a first end and a second end that are disposed opposite to each other. The first end of the support member 1 is provided with a pre-tightening mechanism, and the second end of the support member 1 is provided with a connecting member 9. The second end of the support member 1 is not provided with a pre-tightening mechanism.

[0086] For example, a connector 9 and a pre-tightening mechanism can be provided at both ends of the same support member 1, or a connector 9 can be provided at each end of the same support member 1.

[0087] Since there are multiple support members 1 in each ring, it is necessary to splice adjacent support members 1. For example, two adjacent support members 1 can be connected by connector 9. The reason for setting connector 9 is that if pre-tightening mechanisms are used for all of them, it will affect the overall strength.

[0088] The shape of the connector 9 is similar to that of the support 1, also in the shape of a "mountain". It is located between two adjacent support 1s. After the connector 9 is fitted onto the two adjacent support 1s, fasteners such as pins 5 are used to fix the two adjacent support 1s together, so that the two adjacent support 1s can be fixed relative to each other through the connector 9.

[0089] For example, the pre-tightening mechanism and connector 9 can be staggered for support strength considerations.

[0090] Reference Figures 9-11 In other words, a support member 1 can be equipped with only one pre-tightening mechanism, and the support member 1 can be connected to another support member 1 through a connector 9. This ensures that the support member 1 can obtain the pre-tightening force of the pre-tightening mechanism, while also ensuring the support strength of the support member 1.

[0091] The number of connectors 9 and the number of pre-tightening mechanisms can be set to several. Several connectors 9 and several pre-tightening mechanisms can be arranged alternately in sequence. One connector 9 and one pre-tightening mechanism can be set at both ends of the same support member 1. The support member 1 can be connected to an adjacent support member 1 through the pre-tightening mechanism at one end. The support member 1 can also be connected to another adjacent support member 1 through the connector 9 at the other end.

[0092] Reference Figure 6 In some possible implementations, the preload mechanism may include a mating bolt 2 and a nut 21. The bolt 2 passes through the support member 1, and the nut 21 is threadedly connected to the bolt 2, and the nut 21 can apply a force to the support member 1.

[0093] Exemplarily, the plurality of support members 1 can include a first support member 13 and a second support member 14, and the pre-tightening mechanism connects the first support member 13 and the second support member 14. The bolt 2 includes opposite first and second end portions 31 and 32, the first end portion 31 is connected with the first support member 13, and the second end portion 32 is connected with the second support member 14.

[0094] The plurality of nuts 21 includes a first nut 21 and a second nut 21. The first nut 21 is threadedly connected with the first end portion 31, and the first nut 21 can apply an action force to the first support member 13 away from the second support member 14. The second nut 21 is threadedly connected with the second end portion 32, and the second nut 21 can apply an action force to the second support member 14 away from the first support member 13.

[0095] By adopting the above technical solution, when the first nut 21 at the first end portion 31 is tightened, a first direction pre-tightening force is generated on the first support member 13, and when the second nut 21 at the second end portion 32 is tightened, a second direction pre-tightening force is generated on the second support member 14, the first direction and the second direction are opposite, that is, the pre-tightening force device formed by the cooperating bolt 2 and nut 21 can improve the support force of the support member 1 on the segment 100, thereby improving the overall bearing capacity and forming an excellent reinforcing effect.

[0096] Exemplarily, the number of the first nuts 21 can be two, and the two first nuts 21 are arranged in sequence, one of the first nuts 21 is close to the first support member 13, and the other first nut 21 is away from the first support member 13.

[0097] When the first nut 21 applies a pre-tightening force to the first support member 13, the generation of the pre-tightening force mainly occurs in the process of tightening the first nut 21 close to the first support member 13, and the other first nut 21 (i.e. the first nut 21 away from the first support member 13) mainly functions to lock the first nut 21 close to the first support member 13 to prevent loosening.

[0098] The number of the second nuts 21 can be two, and the two second nuts 21 are arranged in sequence, one of the second nuts 21 is close to the second support member 14, and the other second nut 21 is away from the second support member 14.

[0099] When the second nut 21 applies a pre-tightening force to the second support member 14, the generation of the pre-tightening force mainly occurs in the process of tightening the second nut 21 close to the second support member 14, and the other second nut 21 (i.e. the second nut 21 away from the second support member 14) mainly functions to lock the second nut 21 close to the second support member 14 to prevent loosening.

[0100] Referring toFigure 6 In some possible embodiments, the first support 13 and the second support 14 have a gap 3 therebetween. Between the first support 13 and the second support 14, the number of pre-tightening mechanisms is multiple, and the multiple bolts 2 are sequentially and spacedly arranged, at least part of the bolts 2 being located in the gap 3.

[0101] For example, between the adjacent first support 13 and the second support 14, the number of pre-tightening mechanisms can be set to two or three. It is easy to understand that the number of pre-tightening mechanisms can be set to other numbers, and the embodiments of the present application do not make further limitations thereon.

[0102] Referring to Figure 6 In some possible embodiments, the support 1 comprises a connecting end face 4. The connecting end face 4 can have a first end face 41 and a second end face 42 connected to each other, the first end face 41 can be located at the end of the body 11, and the second end face 42 can be located at the side of the body 11.

[0103] For example, the bolt 2 can be arranged through the first end face 41 and threadedly connected with the first end face 41, and the extension direction of the bolt 2 can be arranged perpendicularly to the first end face 41.

[0104] The connecting end face 4 is shaped like a "U" letter, and the connecting end face 4 has a first end face 41 and two oppositely arranged second end faces 42, two threaded holes are formed in the first end face 41 for the bolt 2 to pass through the support 1, and the size of the threaded holes is matched with the bolt 2.

[0105] In some possible embodiments, the connecting end face 4 can be provided with a pin 5. The pin 5 is arranged through the second end face 42, the pin 5 is arranged through the body 11, and the connecting end face 4 is fixed with the body 11 of the support 1 through the pin 5.

[0106] Two holes are formed in the second end face 42 for the pin 5 to pass through, the support 1 is located between the two second end faces 42, the two ends of the pin 5 are respectively located on the two second end faces 42, the pin 5 is first arranged through the hole in one of the second end faces 42, then passes through the body 11, and finally is arranged out of the hole in the other second end face 42, so that the connecting end face 4 can be fixed with the body 11 of the support 1 through the pin 5.

[0107] In some possible embodiments, the support 1 is provided with multiple reinforcing ribs 12, the multiple reinforcing ribs 12 are sequentially and spacedly arranged, and a connecting channel can be arranged between the adjacent two reinforcing ribs 12. The reinforcing rib 12 is further provided with an anti-loosening through hole 121 for the pin 5 to pass through, and the pin 5 can prevent the bolt 2 from loosening.

[0108] Exemplarily, the reinforcing rib 12 can also be used to fix the connecting piece 9, the connecting piece 9 can connect the reinforcing ribs 12 of two adjacent support pieces 1, so as to make the connection between the two adjacent support pieces 1 more stable.

[0109] Between the two adjacent support pieces 1, at least part of the bolt 2 is located in the connecting channel of one of the support pieces 1, and at least part of the bolt 2 is located in the connecting channel of the other support piece 1.

[0110] Exemplarily, the first support piece 13 has a plurality of first reinforcing ribs 122, the second support piece 14 has a plurality of second reinforcing ribs 123, a first connecting channel 124 is arranged between two adjacent first reinforcing ribs 122, a second connecting channel 125 is arranged between two adjacent second reinforcing ribs 123, one end of the bolt 2 is inserted into the first connecting channel 124, and the other end of the bolt 2 is inserted into the second connecting channel 125.

[0111] The bottom of the first connecting channel 124 and the second connecting channel 125 is provided with a through hole, and after the locking nut 21, the chemical anchor 8 is used to pass through the through hole to fixedly connect the segment 100 and the support piece 1, and the chemical anchor 8 here only plays a fixing role and does not bear a load.

[0112] In summary, the pre-tightening force reinforcing device comprises a plurality of support pieces 1 and at least one pre-tightening mechanism; the plurality of support pieces 1 are connected in sequence, and the plurality of support pieces 1 are used to support a to-be-reinforced member. The pre-tightening mechanism connects two adjacent support pieces 1, and the pre-tightening mechanism can apply an adjustable pre-tightening force to the two adjacent support pieces 1, so that the to-be-reinforced member can be supported by the plurality of support pieces 1 and the pre-tightening mechanism in cooperation.

[0113] In the related art, the maintenance and reinforcement method not only increases the load on the already deformed segment 100, but also does not significantly improve the bearing capacity of the segment 100 after the initial installation of the reinforcing material body. For example, the reinforcing material body can only bear the segment 100 when the segment 100 deforms again, which makes the support effect of the reinforcing material body on the segment 100 poor, and the reinforcing material body mainly replaces the segment 100 to provide bearing capacity to the tunnel alone.

[0114] In the embodiments of the present application, the pre-tightening mechanism provides a pre-tightening force to the two adjacent support pieces 1, which not only improves the support effect of the support piece 1 on the to-be-reinforced member, but also enables the pre-tightening mechanism to provide bearing capacity to the inner wall 102 of the tunnel together with the to-be-reinforced member, and the pre-tightening mechanism can also make the support piece 1 have a support effect more quickly, so that the support force can be provided to the to-be-reinforced member between the deformation of the segment 100 and the like, and the reinforcing effect of the pre-tightening force reinforcing device is further improved.

[0115] The pre-tightening force reinforcing device has at least the following advantages: improving the structure bearing capacity of the pre-tightening force reinforcing device. The support 1 in the shape of a mountain can improve the bearing capacity, and the bolt 2 and the nut 21 are matched and reversely supported, forming a pre-tightening force, which improves the overall bearing capacity of the support 1.

[0116] The reinforcing effect of the pre-tightening force reinforcing device is obvious. In the traditional reinforcing method, the steel plates are fixed in a whole circle, and the butt welding between the steel plates is needed, and the reinforcing effect can be achieved after the segment 100 continues to deform. The device uses the outward arc reverse tightening of the supporting piece 1 by the supporting screw and nut 21, so as to form a pre-tightening force, and the segment 100 can be immediately reinforced after installation.

[0117] The pre-tightening force reinforcing device has high construction efficiency. The product can be produced in batches and quickly, the body 11 and the reinforcing rib 12 are integrally hot-rolled and formed, and only the pre-tightening piece, the nut 21 and the chemical anchor rod 8 for fixing are needed on site, without welding, which can improve the construction efficiency and reduce the cost.

[0118] The embodiment of the application provides a pre-tightening force reinforcing method for a tunnel or a mine, which comprises the following steps: S101, providing a plurality of supports 1, the plurality of supports 1 are connected in sequence, and at least two adjacent supports 1 have a pre-tightening mechanism therebetween. The structure of the support 1 and the pre-tightening mechanism can refer to the description above, and the embodiment of the application will not be described here.

[0119] In some possible implementation manners, after the plurality of supports 1 are provided, the reinforcing method further comprises the following step: S102, arranging the plurality of supports 1 on a to-be-reinforced member, and the plurality of supports 1 support the to-be-reinforced member.

[0120] For example, the supports 1 can be arranged according to the length and the arc of the segment 100 or the mine roadway, and the supports 1, the pre-tightening mechanism and the support bracket 10 can be produced according to the on-site demand, so that the plurality of supports 1 can be arranged on the inner side of the to-be-reinforced member.

[0121] After the plurality of supports 1 are arranged on the to-be-reinforced member, the reinforcing method further comprises the following step: S103, adjusting the pre-tightening mechanism to adjust the pre-tightening force applied by the pre-tightening mechanism to the two adjacent supports 1, so that the support 1 is in close abutment with the to-be-reinforced member.

[0122] For example, the specific structure of the pre-tightening mechanism can refer to the description above, and the embodiment of the application will not be described here. The first nut 21 at the first end portion 31 can be tightened, so that the first nut 21 generates a pre-tightening force in the first direction on the first support 13. The second nut 21 at the second end portion 32 can be tightened, so that the second nut 21 generates a pre-tightening force in the second direction on the second support 14.

[0123] Then, the pin 5 can be first inserted into the hole on one of the second end faces 42, then through the body 11, and finally inserted out of the hole on the other second end face 42, so that the connecting end face 4 can be fixed with the body 11 of the support 1 through the pin 5.

[0124] Subsequently, glue can be filled between the body 11 of the support 1 and the segment 100 or between the body 11 of the support 1 and the inner wall 102 of the mine roadway. When the application scenario is a shield tunnel, the glue is filled between the body 11 of the support 1 and the segment 100; when the application scenario is a mine roadway, the glue is filled between the body 11 and the inner wall 102 of the mine roadway.

[0125] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0126] In the description of the present application, it should be understood that the terms "include" and "have" and any variations thereof used herein are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units need not be limited to those clearly listed steps or units, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0127] Unless otherwise clearly specified and limited, the terms "mount", "connect", "connect", "fix", and the like should be broadly understood, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be directly connected, or can be indirectly connected through an intermediate medium; can be connected or interacted between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. In addition, the terms "first", "second", etc. are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0128] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application; although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions recorded in the above embodiments can be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A pre-tensioning reinforcement device for tunnels or mines, characterized in that, Includes multiple support components and at least one pre-tensioning mechanism; The plurality of support members are connected in sequence, and the plurality of support members are used to support the component to be added; The component to be reinforced is a new segment of a shield tunnel, and multiple support members are arranged around the circumference of the new segment; or, the component to be reinforced is a mine roadway, and multiple support members are arranged around the inner wall of the mine roadway. The pre-tightening mechanism connects two adjacent support members and can apply an adjustable pre-tightening force to the two adjacent support members; The preload mechanism includes a mating bolt and nut; The bolt passes through the support member, and the nut is threadedly connected to the bolt, and the nut can apply a force to the support member; The support component includes a body and a connecting end face; The connecting end face has a first end face and a second end face that are connected to each other. The first end face is located at the end of the body, and the second end face is located on the side of the body. The bolt passes through the first end face and is threaded to the first end face. The extension direction of the bolt is perpendicular to the first end face. The connecting end face is provided with a pin; The pin passes through the second end face and the body, and the connecting end face is fixed to the body by the pin; The support member is provided with multiple reinforcing ribs, which are arranged at intervals in sequence, and a connecting channel is provided between two adjacent reinforcing ribs. Between two adjacent supports, at least a portion of the bolt is located within a connection channel of one of the supports and at least a portion of the bolt is located within a connection channel of the other support.

2. The pre-tensioning reinforcement device for tunnels or mines according to claim 1, characterized in that, The plurality of support members include a first support member and a second support member, and the pre-tightening mechanism connects the first support member and the second support member; The bolt includes a first end and a second end opposite to each other, the first end being connected to the first support member and the second end being connected to the second support member; The number of nuts is multiple, and the multiple nuts include a first nut and a second nut; The first nut is threaded to the first end and can apply a force to the first support member away from the second support member; the second nut is threaded to the second end and can apply a force to the second support member away from the first support member.

3. The pre-tensioning reinforcement device for tunnels or mines according to claim 2, characterized in that, There is a gap between the first support member and the second support member; Between the first support member and the second support member, there are multiple pre-tightening mechanisms, and multiple bolts are arranged sequentially at intervals, with at least a portion of each bolt located within the gap.

4. The pre-tensioning reinforcement device for tunnels or mines according to claim 1, characterized in that, The support member is equipped with a chemical anchor rod, which allows the support member to be fixedly connected to the component to be reinforced.

5. The pre-tensioning reinforcement device for tunnels or mines according to any one of claims 1-4, characterized in that, It also includes a connector that can be used to connect two adjacent support members; The support member includes a first end and a second end that are disposed opposite to each other; The first end of the support member is provided with the pre-tightening mechanism, the second end of the support member is provided with the connecting member, and the second end of the support member is not provided with the pre-tightening mechanism.

6. A method for pre-tensioning reinforcement in tunnels or mines, characterized in that, The pre-tensioning device for tunnels or mines according to any one of claims 1-5 comprises: A plurality of the aforementioned support members are provided, the plurality of support members are connected in sequence, and the pre-tightening mechanism is provided between at least two adjacent support members; Multiple support members are arranged on the component to be reinforced, and the multiple support members support the component to be reinforced, which is a new segment of a shield tunnel or the inner wall of a mine roadway. Adjust the pre-tightening mechanism to adjust the pre-tightening force applied by the pre-tightening mechanism to the two adjacent support members, so that the support members are in close contact with the fastener to be reinforced.

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