A self-compacting waterproof joint for a tunnel passing through a normal fault and a construction method thereof

Abstract

The present invention discloses a self-compacting waterproof joint for tunnels through normal faults. The self-compacting waterproof joint comprises a female locking buckle, a male locking buckle, and a buckle filling structure. The female locking buckle is located within a deformation absorbing layer; the male locking buckle is located within a receiving space of the female locking buckle; and the buckle filling structure is disposed within the receiving space of the female locking buckle, the buckle filling structure being located between the male locking buckle and a groove edge of the female locking buckle. The present invention also provides a construction method for a self-compacting waterproof joint for tunnels through normal faults. Compared with the prior art, the self-compacting waterproof joint for tunnels through normal faults of the present invention has the advantages of good waterproofing effect and low repair difficulty.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel construction, in particular to a self-compacting waterproof joint for a tunnel passing through a normal fault and a construction method thereof. Background Art

[0002] Many tunnels located in high-intensity seismic zones inevitably cross active faults. The surrounding rock near active faults is often fragmented, has poor self-stabilization capabilities, and is highly permeable. Past tunnel damage data from earthquakes indicates that fault movement can lead to tunnel lining damage and water seepage, posing a significant threat to tunnel safety.

[0003] Segmental design is a commonly used technique for preventing fault movement in tunnel construction. Segmental design involves dividing the tunnel lining into multiple segments, with expansion joints installed between them. Because expansion joints are less rigid than normal lining structures, segmental design increases the lining's deformation capacity, reducing internal forces and the risk of rupture. However, due to the low rigidity of expansion joints, they deform significantly under fault movement, making them highly susceptible to leakage. Currently, waterproofing of lining expansion joints typically utilizes back-attached waterstops, embedded waterstops, and W-shaped waterstops. These structures primarily rely on the inherent waterproofing of the material and their close contact with the lining on either side. Under the compressive forces of thrust faults, these expansion joint waterstops offer good waterproofing effectiveness. However, under the tensile deformation of normal faults, these expansion joint waterproofing structures undergo significant tensile deformation, which reduces the pressure between the waterstop structure and the lining on either side, and can easily be damaged, resulting in a decrease in the expansion joint's waterproofing capacity or even failure.

[0004] Therefore, how to provide a self-compacting waterproof joint for a tunnel passing through a normal fault so that it can achieve the technical effect of waterproofing when the normal fault moves is a technical problem that technical personnel in this field urgently need to solve. Summary of the Invention

[0005] In view of the problems existing in the prior art, the technical problem to be solved by the present invention is to provide a self-compacting waterproof joint for a tunnel passing through a normal fault, so that the waterproof function can be maintained after the fault shift occurs, and at the same time, the tunnel function can be quickly restored without repair or through simple repair after the fault shift.

[0006] To achieve the above-mentioned purpose, the present invention provides a self-compacting waterproof joint for a tunnel passing through a normal fault, wherein the self-compacting waterproof joint for a tunnel passing through a normal fault is arranged in a tunnel lining structure located within the influence range of the tunnel passing through a normal fault, wherein the tunnel lining structure includes a deformation absorbing layer and a secondary lining layer, wherein the secondary lining layer includes a plurality of construction segments, wherein the plurality of construction segments are arranged along the deformation absorbing layer, and a deformation joint is arranged between any two adjacent construction segments; the self-compacting waterproof joint for a tunnel passing through a normal fault comprises: a female locking buckle, wherein the female locking buckle is arranged along the entire circumference of the deformation absorbing layer, wherein the female locking buckle is located in the deformation absorbing layer, wherein the female locking buckle comprises a groove bottom and two groove edges, wherein one end of one groove edge is fixedly connected to one end of the groove bottom, and one end of the other groove edge is fixedly connected to the groove bottom. The other end is fixedly connected to form a "door"-shaped structure; there is a accommodating space between the two groove edges; a male lock buckle, the male lock buckle is arranged along the entire circumference of the deformation absorbing layer, the male lock buckle is located in the accommodating space, and the male lock buckle is spaced apart from the groove bottom; a lock buckle filling structure, the lock buckle filling structure is fixed in the accommodating space, and the lock buckle filling structure is located between the male lock buckle and one of the groove edges; wherein, a first porous sealing rubber block is filled between the other end of one of the groove edges and one of any two adjacent construction sections, and the other end of the other groove edge is fixedly connected to the steel bar of the other of any two adjacent construction sections; the end of the male lock buckle away from the groove bottom is fixedly connected to the steel bar of one of any two adjacent construction sections.

[0007] In the first aspect, the male lock buckle is in a "1"-shaped structure; a second porous sealing rubber block is filled between the male lock buckle and the groove bottom.

[0008] In the first aspect, the locking filling structure is a porous sealing rubber-foam concrete prefabricated block-porous sealing rubber composite structure.

[0009] In the first aspect, there is an isolation space between the inner side wall of the other groove edge and the male lock buckle, the isolation space and the deformation joint are located on the same straight line, the isolation space is connected to the deformation joint, and the isolation space and the deformation joint have the same width.

[0010] In the first aspect, the deformation joint and the isolation space are both caulked with foam concrete material.

[0011] In the first aspect, the female locking buckle and the male locking buckle are both made of high-strength and high-ductility materials.

[0012] The present invention also provides a construction method for a self-compacting waterproof joint for a tunnel through a normal fault. The construction method for a self-compacting waterproof joint for a tunnel through a normal fault is used for the construction of the above-mentioned self-compacting waterproof joint for a tunnel through a normal fault, and the construction method includes: applying a female lock buckle, fixing a lock buckle filling structure tightly against the side wall of one groove edge in the accommodating space; adhering a second porous sealing rubber block to the bottom of the groove between the fixed lock buckle filling structure and the other groove edge; applying a male lock buckle on the second porous sealing rubber block; erecting the steel bars of the first construction section of the secondary lining layer, fixedly connecting the male lock buckle to the steel bars of the first construction section, and then pouring lining concrete; after the strength of the lining concrete of the first construction section reaches the requirement, erecting the steel bars of the second construction section of the secondary lining layer, fixedly connecting the other groove edge to the steel bars of the second construction section, and then continuing to pour the lining concrete; after the strength of the lining concrete of the second construction section reaches the requirement, cleaning the deformation joint, and caulking the deformation joint and the isolation space with foam concrete material.

[0013] In the second aspect, after the tunnel excavation is completed, the initial support construction is carried out in a timely manner to obtain the initial support layer; after the deformation of the surrounding rock is stabilized, the waterproof layer is laid; the deformation absorbing layer is laid on the surface of the waterproof layer, and at the same time, space for the female lock buckle is reserved in the deformation absorbing layer.

[0014] In the second aspect, before the reinforcement of the first construction section of the secondary lining layer is installed, a first porous sealing rubber block is adhered to the other end of one of the groove edges.

[0015] In the second aspect, one end of the second sealing rubber block is fixed tightly against the fixed lock filling structure.

[0016] Beneficial effects:

[0017] The self-compacting waterproof joint of a tunnel through a normal fault of the present invention mainly comprises a female locking buckle, a male locking buckle, and a locking buckle filling structure, wherein the female locking buckle is arranged in a deformation absorbing layer and is arranged with the help of the deformation absorbing layer, and the deformation absorbing layer is made of foam concrete material; one groove edge of the female locking buckle is adjacent to a construction segment, and the other groove edge of the female locking buckle is fixedly connected to the other construction segment, so that the female locking buckle is located between the construction segments of the secondary lining layer, and a deformation joint is formed between the two adjacent construction segments, the male locking buckle is located in the accommodating space, and one end of the male locking buckle away from the groove bottom is fixedly connected to a construction segment, the male locking buckle is located on one side of the deformation joint, and the locking buckle filling structure is filled between the male locking buckle. During the construction process, the first construction segment constructed first in the secondary lining layer is adjacent to a groove edge of the female locking buckle, and a first porous sealing rubber block is filled therebetween. The steel bars in the later construction segment constructed later in the secondary lining layer are fixedly connected to the other groove edge of the female locking buckle, and the end of the male locking buckle away from the groove bottom is fixedly connected to the first construction segment in the secondary lining layer The steel bars in the first construction section of the construction are fixedly connected; when a normal fault movement occurs, the surrounding rock of the upper plate of the fault and the initial support layer slide down along the main sliding surface of the fault, and the foam concrete material of the deformation absorbing layer can absorb most of the fault dislocation deformation. Under the remaining fault dislocation deformation, the secondary lining layer in the upper plate area of ​​the fault slides downward along the main sliding surface of the fault, causing compression between the groove bottom of the female lock buckle and the male lock buckle, so that the lock buckle filling structure is compressed. The lock buckle filling structure is a composite structure of porous sealing rubber-foam concrete prefabricated block-porous sealing rubber. The foam concrete prefabricated block of the lock buckle filling structure absorbs part of the compression deformation. At the same time, the pressure of the porous sealing rubber increases, and the water-stopping effect is enhanced, achieving the waterproof effect of the self-compacting waterproof joint of the tunnel passing through the normal fault; in addition, after the fault movement, the deformation joint becomes wider, and the self-compacting waterproof joint of the tunnel passing through the normal fault will not be damaged as a whole. It is only necessary to fill the deformation joint of the secondary lining layer with foam concrete, which is easy to repair and low in cost. In summary, the self-compacting waterproof joint for a tunnel passing through a normal fault of the present invention has good waterproofing effect and low repair difficulty when a normal fault dislocation occurs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of this specification or the technical solutions in the prior art, 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.

[0019] Figure 1 This is a longitudinal section of a self-compacting waterproof joint for a tunnel through a normal fault according to the present invention, located in a tunnel lining structure;

[0020] Figure 2 is a longitudinal sectional view of the female lock buckle of the present invention;

[0021] Figure 3 yes Figure 1 AA cross-sectional view;

[0022] Figure 4 yes Figure 1 BB cross-section diagram;

[0023] Figure 5 yes Figure 1 CC cross-sectional view;

[0024] Figure 6 yes Figure 1 DD cross-section diagram;

[0025] Figure 7 It is a schematic diagram of the structural deformation of the self-compacting waterproof joint of the tunnel through the normal fault of the present invention acting on the tunnel lining structure after the fault slip occurs.

[0026] Reference numerals:

[0027] 1. Deformation absorbing layer; 2. Secondary lining layer; 3. Female lock buckle; 31. Groove bottom; 32. Groove edge; 4. Male lock buckle; 5. Lock buckle filling structure; 6. First porous sealing rubber block; 7. Second porous sealing rubber block; 8. Foam concrete material; 9. Initial support layer; 10. Waterproof layer. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of this specification to clearly and completely describe the technical solutions in the embodiments of this specification. Obviously, the embodiments described are only part of the embodiments of this specification, not all of the embodiments. Based on the embodiments in this specification, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this invention.

[0029] Example 1

[0030] like Figures 1 to 7As shown, the first embodiment of the present invention provides a self-compacting waterproof joint for a tunnel passing through a normal fault, wherein the self-compacting waterproof joint for a tunnel passing through a normal fault is arranged in a tunnel lining structure located within the influence range of the tunnel passing through a normal fault, wherein the tunnel lining structure includes a deformation absorbing layer 1 and a secondary lining layer 2, wherein the secondary lining layer 2 includes a plurality of construction segments, wherein the plurality of construction segments are arranged along the deformation absorbing layer 1, and a deformation joint is arranged between any two adjacent construction segments; the self-compacting waterproof joint for a tunnel passing through a normal fault includes: a female locking buckle 3, wherein the female locking buckle 3 is arranged along the entire circumference of the deformation absorbing layer 1, wherein the female locking buckle 3 is located in the deformation absorbing layer 1, wherein the female locking buckle 3 includes a groove bottom 31 and two groove edges 32, wherein one end of one groove edge 32 is fixedly connected to one end of the groove bottom 31, and one end of the other groove edge 32 is fixedly connected to the other end of the groove bottom 31 The ends are fixedly connected to form a "door"-shaped structure; there is a accommodating space between the two groove edges 32; the male lock buckle 4, the male lock buckle 4 is arranged along the entire circumference of the deformation absorbing layer 1, the male lock buckle 4 is located in the accommodating space, and the male lock buckle 4 is spaced apart from the groove bottom 31; the lock buckle filling structure 5, the lock buckle filling structure 5 is fixed in the accommodating space, and the lock buckle filling structure 5 is located between the male lock buckle 4 and one of the groove edges 32; wherein, the other end of one of the groove edges 32 and one of any two adjacent construction sections is filled with a first porous sealing rubber block 6, and the other end of the other groove edge 32 is fixedly connected to the steel bar of the other of any two adjacent construction sections; the end of the male lock buckle 4 away from the groove bottom 31 is fixedly connected to the steel bar of one of any two adjacent construction sections.

[0031] The tunnel lining structure includes an initial support layer 9, a waterproof layer 10, a deformation absorbing layer 1 and a secondary lining layer 2. The initial support layer 9, the waterproof layer 10, the deformation absorbing layer 1 and the secondary lining layer 2 are arranged layer by layer from the outside to the inside; a self-compacting waterproof joint for a tunnel through a normal fault of the present invention mainly includes a female lock buckle 3, a male lock buckle 4, and a lock buckle filling structure 5. The female lock buckle 3 is arranged in the deformation absorbing layer 1 with the help of the deformation absorbing layer 1, and the deformation absorbing layer 1 is a foam concrete material; one groove edge 32 of the female lock buckle 3 is adjacent to a construction segment, and the other groove edge 32 of the female lock buckle 3 is adjacent to another construction segment A construction segment is fixedly connected so that the female lock buckle 3 is located between the construction segments of the secondary lining layer 2. There is a deformation joint between two adjacent construction segments. The male lock buckle 4 is located in the accommodating space. The end of the male lock buckle 4 away from the groove bottom 31 is fixedly connected to a construction segment. The male lock buckle 4 is located on one side of the deformation joint. A lock buckle filling structure 5 is filled between the male lock buckle 4. During the construction process, the first construction segment constructed first in the secondary lining layer 2 is adjacent to a groove edge 32 of the female lock buckle 3, and the first porous sealing rubber block 6 is filled between them. The second construction segment constructed later in the secondary lining layer 2 is adjacent to a groove edge 32 of the female lock buckle 3. The steel bars in the working section are fixedly connected to the other groove edge 32 of the female lock buckle 3, and the end of the male lock buckle 4 away from the groove bottom 31 is fixedly connected to the steel bars in the first construction section of the secondary lining layer 2; when normal fault dislocation occurs, the surrounding rock of the fault hanging wall and the initial support layer 9 slide down along the main sliding surface of the fault, and the foam concrete material of the deformation absorbing layer 1 can absorb most of the fault dislocation deformation. Under the remaining fault dislocation deformation, the secondary lining layer 2 in the fault hanging wall area slides downward along the main sliding surface of the fault, causing compression between the groove bottom of the female lock buckle 3 and the male lock buckle 4, so that the lock buckle filling structure The structure 5 is compressed, and the locking filling structure 5 is a composite structure of porous sealing rubber-foam concrete prefabricated block-porous sealing rubber. The foam concrete prefabricated block of the locking filling structure 5 absorbs a part of the compression deformation. At the same time, the pressure of the porous sealing rubber increases, and the water-stopping effect is enhanced, achieving the waterproof effect of the self-compacting waterproof joint of the tunnel through the normal fault. In addition, after the fault moves, the deformation joint becomes wider, and the self-compacting waterproof joint of the tunnel through the normal fault will not be completely destroyed. It is only necessary to fill the deformation joint of the secondary lining layer with foam concrete material 8, which has low repair difficulty and low cost. In summary, the self-compacting waterproof joint of the tunnel through the normal fault of the present invention has good waterproof effect and low repair difficulty when the normal fault moves.

[0032] In some possible implementations, the male lock buckle 4 is in a “1”-shaped structure; a second porous sealing rubber block 7 is filled between the male lock buckle 4 and the groove bottom 31 .

[0033] Specifically, the second porous sealing rubber block 7 is arranged between the male lock buckle 4 and the groove bottom 31. When a normal fault occurs, the male lock buckle 4 and the groove bottom 31 are compressed, and the second porous sealing rubber block 7 plays a buffering role. At the same time, the pressure of the second porous sealing rubber block 7 increases, further enhancing the water-stopping effect.

[0034] In some possible implementations, the lock filling structure 5 is a composite structure of porous sealing rubber-foam concrete prefabricated block-porous sealing rubber; there is an isolation space between the inner wall of the other groove edge 32 and the male lock 4, and the isolation space and the deformation joint are located on the same straight line, the isolation space is connected to the deformation joint, and the isolation space has the same width as the deformation joint; the deformation joint and the isolation space are both caulked with foam concrete material 8.

[0035] Specifically, the lock filling structure 5 is a lock filling structure of a porous sealing rubber-foam concrete prefabricated block-porous sealing rubber composite structure, which is arranged between the groove edge 32 and the male lock buckle 4. In the accommodating space from the groove edge 32 to the male lock buckle 4, the porous sealing rubber and the foam concrete prefabricated block are arranged adjacent to each other, so that when a normal fault dislocation occurs, the lock filling structure 5 can more effectively absorb compression deformation and stop water. In addition, when a normal fault dislocation occurs, due to the compression between the male lock buckle 4 and the female lock buckle 3, the lock filling structure 5 is compressed, so that the joint will not be completely damaged after the fault dislocation. It is only necessary to fill the deformation joint of the secondary lining layer 2 with foam concrete material 10, and the repair difficulty is small and the cost is low.

[0036] In some possible implementations, the female locking buckle 3 and the male locking buckle 4 are both made of high-strength and high-ductility materials.

[0037] Specifically, when the normal fault moves, a tensioning effect will be generated, and the high-strength and high-ductility materials can prevent the female lock buckle 3 and the male lock buckle 4 from breaking or serious deformation.

[0038] Example 2

[0039] like Figures 1 to 7As shown, the second embodiment of the present invention provides a construction method for a self-compacting waterproof joint for a tunnel passing through a normal fault. The construction method for a self-compacting waterproof joint for a tunnel passing through a normal fault is used for the construction of a self-compacting waterproof joint for a tunnel passing through a normal fault in the first embodiment. The construction method comprises: applying a female lock buckle, fixing a lock buckle filling structure close to the side wall of one groove edge in the accommodating space; adhering a second porous sealing rubber block to the bottom of the groove between the fixed lock buckle filling structure and the other groove edge; applying a male lock buckle on the second porous sealing rubber block; erecting a secondary lining. The steel bars of the first construction section of the layer are fixedly connected with the male lock buckle and the steel bars of the first construction section, and then the lining concrete is poured; after the strength of the lining concrete of the first construction section reaches the requirement, the steel bars of the second construction section of the secondary lining layer are erected, the other groove edge is fixedly connected with the steel bars of the second construction section, and then the lining concrete is continued to be poured; after the strength of the lining concrete of the second construction section reaches the requirement, the deformation joints are cleaned and the deformation joints and the isolation space are caulked with foam concrete material.

[0040] Specifically, the female lock buckle 3 and the male lock buckle 4 are arranged with the aid of the deformation absorbing layer 1, and a second porous sealing rubber block 7 is filled between the male lock buckle 4 and the groove bottom 31, which has the effect of buffering and water stopping; the setting of the lock buckle filling structure 5 absorbs part of the compression deformation when a normal fault occurs, and at the same time the pressure of the porous sealing rubber increases, the water stopping effect is enhanced, and the joint self-compacting and waterproof effect is achieved; the other groove edge 32 of the female lock buckle 3 is fixedly connected to the steel bar of the rear construction section of the secondary lining layer 2, and the end of the male lock buckle 4 away from the groove edge 32 is fixedly connected to the steel bar of the front construction section of the secondary lining layer 2, so that the normal fault occurs. When the fault is dislocated, the surrounding rock of the upper plate of the fault and the initial support layer 9 slide down along the main sliding surface of the fault, and the deformation absorbing layer absorbs most of the fault dislocation deformation. Under the remaining fault dislocation deformation, the secondary lining layer 2 in the upper plate area of ​​the fault slides down along the main sliding surface of the fault, causing compression between the female lock buckle 3 and the male lock buckle 4, and the lock buckle filling structure 5 is compressed. The lock buckle filling structure 5 absorbs part of the compression deformation. At the same time, the pressure of the porous sealing rubber in the lock buckle filling structure 5 increases, and the water-stopping effect is enhanced, achieving the waterproof effect of the self-compacting waterproof joint of the tunnel passing through the normal fault. Under the tensioning effect of the normal fault, the existing expansion joint water-stopping structure will undergo tensile deformation, and the structural water-stopping pressure will be reduced, resulting in a decrease in the waterproof effect or even failure; after the fault is displaced, the entire expansion joint structure needs to be rebuilt, which is difficult and costly to repair. However, the present invention converts the tensioning effect of the normal fault into a compression effect, thereby achieving self-compacting waterproofing of the joint; after the fault is displaced, the joint will not be completely destroyed, and only the expansion joint of the secondary lining layer 2 needs to be filled with foam concrete material 8, which is easy to repair and low cost.

[0041] It should be noted that the construction method of the self-compacting waterproof joint for a tunnel passing through a normal fault in Example 2 is used for the construction of a self-compacting waterproof joint for a tunnel passing through a normal fault in Example 1. Therefore, the performance principle of the self-compacting waterproof joint for a tunnel passing through a normal fault will not be repeated here. For the undetailed parts, please refer to Example 1.

[0042] In some possible implementations, before the female lock buckle is applied, the construction method further includes: after the tunnel excavation is completed, promptly carrying out initial support construction to obtain an initial support layer; after the deformation of the surrounding rock is stabilized, laying a waterproof layer; laying a deformation absorbing layer on the surface of the waterproof layer, and at the same time reserving space for the application of the female lock buckle in the deformation absorbing layer; before erecting the steel bars of the first construction section of the secondary lining layer, adhering a first porous sealing rubber block to the other end of one of the groove edges; and fixing one end of the second sealing rubber block tightly against the fixed lock buckle filling structure.

[0043] Specifically, the waterproof layer 10 is used for waterproofing the tunnel lining; the first porous sealing rubber block 6 is adhered to the other end of one of the groove edges 32 to have a waterproofing effect.

[0044] In order to further illustrate the technical solution of the present application in detail to support the technical problem to be solved by the present application, the construction of the self-compacting waterproof joint of the tunnel passing through the normal fault of the present application is described below with a specific example, such as Example 1.

[0045] Example 1

[0046] background:

[0047] A highway tunnel in a high-intensity earthquake zone has a circular cross-section. The line vertically crosses an active normal fault with a dip angle of 50 degrees and a displacement of 30 cm. The surrounding rock of the fault zone is broken and water-rich, so the waterproofing requirements of the tunnel lining are high. Figures 1 to 7 As shown, the tunnel clearance diameter is 12.0m. The initial support adopts a 30cm thick C30 shotcrete structure, the waterproof layer adopts earth cloth and EVA waterproof board, the deformation absorption layer adopts 50cm thick foam concrete material, and the secondary lining layer adopts a 40cm thick C40 reinforced concrete structure.

[0048] Determine the construction parameters of self-compacting waterproof joints in tunnels through normal faults:

[0049] The total deformation of the self-compacting waterproof joint of the tunnel through the normal fault transferred from the deformation absorbing layer to the secondary lining layer under the fault fortification dislocation is about 8 cm, corresponding to the horizontal deformation of 8 cm × cos (50°) = 5.1 cm and the vertical deformation of 8 cm × sin (50°) = 6.1 cm.

[0050] Both the male and female locking buckles are made of 4cm thick steel plates. Based on the horizontal and vertical displacement of the self-compacting waterproof joint in a tunnel through a normal fault and the construction requirements, the radial dimensions of the male and female locking buckles are 20cm and the longitudinal length is 35cm.

[0051] Based on the thickness of the locking steel plate and the vertical deformation of 6.1 cm transferred to the secondary lining, the width of the first porous sealing rubber block is 4 cm and the thickness is 6 cm; the width of the first porous sealing rubber block is 4 cm and the thickness is 6 cm;

[0052] Based on construction requirements, the width of the expansion joint is 5cm;

[0053] The longitudinal length of the filling area of ​​the lock filling structure in the accommodating space is the longitudinal length of the female lock minus the thickness of the lock steel plate and the width of the deformation joint, that is, 35cm-4cm×3-5cm=18cm; the longitudinal width of the accommodating space is the radial dimension of the female lock in the deformation absorbing layer minus the thickness of the lock steel plate, that is, 20cm-4cm=16cm. Considering the horizontal deformation of the secondary lining and the convenience of construction, the lock filling structure adopts a composite structure of "3cm thick porous sealing rubber-12cm thick foam concrete prefabricated block-3cm thick porous sealing rubber";

[0054] The construction method of a self-compacting waterproof joint for a tunnel passing through a normal fault of the present invention comprises:

[0055] After the tunnel excavation is completed, the initial support construction is carried out in time to obtain the initial support layer;

[0056] After the deformation of the surrounding rock is stable, lay the waterproof layer;

[0057] A deformation absorbing layer is arranged on the surface of the waterproof layer, and a space for the female locking buckle is reserved in the deformation absorbing layer;

[0058] A female lock buckle is applied to fix the lock buckle filling structure closely against a side wall of a groove edge in the accommodating space;

[0059] A second porous sealing rubber block is adhered to the bottom of the groove between the fixed lock buckle filling structure and the other groove edge; one end of the second sealing rubber block is fixed tightly against the fixed lock buckle filling structure;

[0060] Applying a male lock buckle on the second porous sealing rubber block;

[0061] Glue the first porous sealing rubber block to the other end of one groove edge, then install the steel bars of the first construction section of the secondary lining layer, fix the male lock buckle to the steel bars of the first construction section, and then pour the lining concrete;

[0062] After the strength of the lining concrete of the first construction section reaches the required level, the steel bars of the second construction section are installed, the other trough edge is fixedly connected to the steel bars of the second construction section, and then the lining concrete is poured.

[0063] After the strength of the lining concrete of the subsequent construction section reaches the requirement, the deformation joints are cleaned and the deformation joints and isolation spaces are caulked with foam concrete materials.

[0064] Conclusion: The structural diagram of the self-compacting waterproof joint in the tunnel lining obtained in the above example 1 is shown in Figures 1 to 6 When a normal fault occurs, the deformation diagram of the tunnel lining provided with the self-compacting waterproof joint for tunnels through normal faults of the present invention is shown in FIG. Figure 7 ,Depend on Figure 7 It can be seen that when a normal fault occurs, the surrounding rock of the upper wall of the fault and the initial support layer slide downward along the main sliding surface of the fault. The foam concrete material of the deformation absorbing layer can absorb most of the fault dislocation deformation. Under the remaining fault dislocation deformation, the secondary lining layer in the upper wall area of ​​the fault slides downward along the main sliding surface of the fault, causing compression between the groove bottom of the female lock buckle and the male lock buckle, so that the lock buckle filling structure is compressed. The lock buckle filling structure is a composite structure of porous sealing rubber-foam concrete prefabricated block-porous sealing rubber. The foam concrete prefabricated block of the lock buckle filling structure absorbs part of the compression deformation. At the same time, the pressure of the porous sealing rubber increases, and the water-stopping effect is enhanced, achieving the waterproof effect of the self-compacting waterproof joint of the tunnel passing through the normal fault; in addition, after the fault moves, the deformation joint becomes wider, and the self-compacting waterproof joint of the tunnel passing through the normal fault will not be damaged as a whole. It is only necessary to fill the deformation joint of the secondary lining layer with foam concrete, which is easy to repair and low in cost. In summary, the self-compacting waterproof joint for a tunnel passing through a normal fault of the present invention has good waterproofing effect and low repair difficulty when a normal fault dislocation occurs.

[0065] The above describes in detail the preferred embodiments of the present invention. It should be understood that those skilled in the art can make numerous modifications and variations based on the concepts of the present invention without inventive effort. Therefore, any technical solutions that can be derived by those skilled in the art through logical analysis, reasoning, or limited experimentation based on the concepts of the present invention and the prior art should be within the scope of protection defined by the claims.

Claims

1. A self-compacting waterproof joint for a tunnel through a normal fault, characterized in that: The self-compacting waterproof joint for a tunnel through a normal fault is arranged in a tunnel lining structure located within the influence range of the tunnel through a normal fault, the tunnel lining structure comprising a deformation absorbing layer (1) and a secondary lining layer (2), the secondary lining layer (2) comprising a plurality of construction segments, the plurality of construction segments being arranged along the deformation absorbing layer (1), and a deformation joint being arranged between any two adjacent construction segments; the self-compacting waterproof joint for a tunnel through a normal fault comprises: A female locking buckle (3), the female locking buckle (3) is arranged along the entire circumference of the deformation absorbing layer (1), the female locking buckle (3) is located in the deformation absorbing layer (1), the female locking buckle (3) comprises a groove bottom (31), two groove edges (32), one end of one groove edge (32) is fixedly connected to one end of the groove bottom (31), and one end of the other groove edge (32) is fixedly connected to the other end of the groove bottom (31), so as to form a "door"-shaped structure; there is an accommodating space between the two groove edges (32); A male locking buckle (4), the male locking buckle (4) being arranged along the entire circumference of the deformation absorbing layer (1), the male locking buckle (4) being located in the accommodating space, and the male locking buckle (4) being spaced apart from the groove bottom (31); A lock buckle filling structure (5), the lock buckle filling structure (5) is fixed in the accommodating space, and the lock buckle filling structure (5) is located between the male lock buckle (4) and one of the groove edges (32); The first porous sealing rubber block (6) is filled between the other end of one of the groove edges (32) and one of any two adjacent construction segments, and the other end of the other groove edge (32) is fixedly connected to the steel bar of the other of any two adjacent construction segments; and the end of the male lock buckle (4) away from the groove bottom (31) is fixedly connected to the steel bar of one of any two adjacent construction segments.

2. A self-compacting waterproof joint for a tunnel through a normal fault according to claim 1, characterized in that: The male lock buckle (4) has an "1"-shaped structure; a second porous sealing rubber block (7) is filled between the male lock buckle (4) and the groove bottom (31).

3. A self-compacting waterproof joint for a tunnel through a normal fault according to claim 2, characterized in that: The lock filling structure (5) is a porous sealing rubber-foam concrete prefabricated block-porous sealing rubber composite structure.

4. A self-compacting waterproof joint for a tunnel through a normal fault according to claim 3, characterized in that: An isolation space is provided between the inner side wall of the other groove edge (32) and the male lock buckle (4), the isolation space and the deformation joint are located on the same straight line, the isolation space is connected to the deformation joint, and the isolation space and the deformation joint have the same width.

5. The self-compacting waterproof joint for a tunnel through a normal fault according to claim 4, characterized in that: The deformation joint and the isolation space are both caulked with foam concrete material (8).

6. The self-compacting waterproof joint for a tunnel through a normal fault according to claim 5, characterized in that: The female lock buckle (3) and the male lock buckle (4) are both made of high-strength and high-ductility materials.

7. A construction method for a self-compacting waterproof joint in a tunnel through a normal fault, characterized in that: The construction method of the self-compacting waterproof joint for a tunnel passing through a normal fault is used for the construction of a self-compacting waterproof joint for a tunnel passing through a normal fault as claimed in any one of claims 1 to 6, and the construction method comprises: A female lock buckle is applied to fix the lock buckle filling structure closely against a side wall of a groove edge in the accommodating space; A second porous sealing rubber block is adhered to the bottom of the groove between the fixed lock filling structure and the other groove edge; Applying a male lock buckle on the second porous sealing rubber block; Installing the steel bars of the first construction section of the secondary lining layer, fixing the male lock buckle to the steel bars of the first construction section, and then pouring lining concrete; After the strength of the lining concrete of the first construction section reaches the required level, the steel bars of the second construction section are installed, the other groove edge is fixedly connected to the steel bars of the second construction section, and then the lining concrete is poured continuously; After the strength of the lining concrete of the later construction section reaches the required level, the deformation joints are cleaned and the deformation joints and the isolation space are caulked with foam concrete material.

8. The construction method of a self-compacting waterproof joint for a tunnel passing through a normal fault as claimed in claim 7, characterized in that: Before applying the female lock buckle, the construction method further includes: After the tunnel excavation is completed, the initial support construction is carried out in time to obtain the initial support layer; After the deformation of the surrounding rock is stable, lay the waterproof layer; A deformation absorbing layer is arranged on the surface of the waterproof layer, and a space for the female locking buckle is reserved in the deformation absorbing layer.

9. The method for constructing a self-compacting waterproof joint for a tunnel through a normal fault as claimed in claim 8, characterized in that: Before the reinforcement of the first construction section of the secondary lining layer is erected, a first porous sealing rubber block is adhered to the other end of one of the groove edges.

10. The construction method of a self-compacting waterproof joint for a tunnel passing through a normal fault according to claim 9, characterized in that: One end of the second porous sealing rubber block is fixed tightly against the fixed lock filling structure.

Images