A tunnel waterproof structure and method

Abstract

The present invention discloses a tunnel waterproof structure and method, relating to the technical field of tunnel waterproofing, including: a first waterproof coiled material laid on the tunnel arch wall, adjacent two first waterproof coiled materials being overlapped through their first overlapping edges, and two mutually overlapped first overlapping edges being connected through a first strip-shaped welding part, the first waterproof coiled material forming a flanging part outside the first strip-shaped welding part; a second waterproof coiled material laid on the tunnel invert and overlapped with the second overlapping edge of the first waterproof coiled material, the second waterproof coiled material being connected with the second overlapping edge through a second strip-shaped welding part, the second strip-shaped welding part being perpendicular to the first strip-shaped welding part; the flanging part between the second overlapping edge and the second waterproof coiled material being cut off; the flanging part between the second overlapping edge and the second waterproof coiled material being cut off, so that the first strip-shaped welding part is exposed, and a water channel formed by the flanging part is eliminated when the first waterproof coiled material and the second waterproof coiled material are overlapped, improving the waterproof effect at the T-shaped joint.

Description

Technical Field

[0001] The invention belongs to the technical field of tunnel waterproofing, and more specifically, relates to a tunnel waterproof structure and method. Background Art

[0002] Tunnel waterproofing has always been a key link in tunnel construction. Tunnel waterproofing includes waterproof construction at multiple nodes. For example, when the inverted arch lapping coil of the waterproof board in the existing tunnel is lapped with the arch wall lapping coil, a "T" - shaped lapping node is generated. Given that most tunnel coils are welded by double - welds, the hot wedge of the double - weld welder is between the upper and lower coils, heating the coils, and the rollers automatically climb - weld and generate extrusion pressure to bond the upper and lower molten - state coils together. However, since there is an inevitable distance between the welding rollers of the welder and the coil edge during welding, the outer edges of the upper and lower coils at this part will not adhere, forming what we commonly call a flying edge. When the arch wall coil with a flying edge is lapped and then joined with the inverted arch coil, the hot wedge of the welder heats the upper surface of the lower coil, and it is impossible to weld the flying edge outside the weld of the arch wall coil, so a water - channeling path will be generated at this part, and it is very easy to have water seepage at this part in the later stage of the tunnel. Summary of the Invention

[0003] The purpose of the invention is to address the deficiencies in the prior art and provide a tunnel waterproof structure and method. The flying - edge part between the second lapping edge and the second waterproof coil of the waterproof structure is cut off, so that the first strip - shaped welding part is exposed. When the first waterproof coil and the second waterproof coil are lapped, the water - channeling path formed by the flying - edge part is eliminated, and the waterproof effect at the "T" - shaped node is improved.

[0004] To achieve the above purpose, the invention provides a tunnel waterproof structure, which includes:

[0005] A first waterproof coil, laid on the tunnel arch wall. Two adjacent first waterproof coils are lapped through their first lapping edges, and the two mutually lapped first lapping edges are connected through a first strip - shaped welding part. The first waterproof coil forms a flying - edge part outside the first strip - shaped welding part;

[0006] A second waterproof coil, laid on the tunnel inverted arch and lapped with the second lapping edge of the first waterproof coil. The second waterproof coil and the second lapping edge are connected through a second strip - shaped welding part, and the second strip - shaped welding part is perpendicular to the first strip - shaped welding part;

[0007] The flying - edge part between the second lapping edge and the second waterproof coil is cut off.

[0008] Optionally, it further includes an isolation layer, which is strip-shaped and is pasted along the axial direction of the tunnel on the side of the first waterproof coiled material at the top of the tunnel arch wall close to the tunnel invert.

[0009] Optionally, the second overlapping edge is on the lower side of the second waterproof coiled material, and a chamfer is provided at the edge of the first waterproof coiled material in contact with the second waterproof coiled material.

[0010] Optionally, a secondary lining structure is provided on the side of the first waterproof coiled material close to the inside of the tunnel, and a grouting channel is formed between the secondary lining structure and the isolation layer.

[0011] Optionally, the tunnel includes a main tunnel and a cross tunnel, and a waterproof connector is provided at the intersection of the main tunnel and the cross tunnel. The waterproof connector includes a plug-in part and a wing part. The plug-in part is arc-shaped, and the plug-in part is inserted into the cross tunnel and can fit with the inner wall of the arch wall of the cross tunnel. The wing part is arranged on the outer periphery of one end of the plug-in part, and the wing part fits with the inner wall of the arch wall of the main tunnel after the plug-in part is inserted into the cross tunnel. An adhesive layer is provided on the inner peripheral surface of the plug-in part and on the surface of the wing part away from the plug-in part.

[0012] Optionally, the part of the first waterproof coiled material laid on the arch wall of the main tunnel close to the cross tunnel is bonded to the wing part, and the part of the first waterproof coiled material laid on the arch wall of the cross tunnel close to the main tunnel is bonded to the plug-in part.

[0013] The present invention also provides a tunnel waterproofing method. Based on the above tunnel waterproofing structure, the waterproofing method includes:

[0014] Laying the first waterproof coiled material and the second waterproof coiled material on the tunnel arch wall and the tunnel invert respectively;

[0015] Welding adjacent first waterproof coiled materials through a first strip-shaped welding part, and forming a flanging part outside the first strip-shaped welding part;

[0016] Cutting off part of the flanging part close to the second waterproof coiled material;

[0017] Welding the first waterproof coiled material with part of the flanging part cut off to the second waterproof coiled material through a second strip-shaped welding part.

[0018] Optionally, it further includes:

[0019] Setting an isolation layer at the top of the tunnel arch wall.

[0020] Optionally, chamfering the edge of the first waterproof coiled material where part of the flanging part has been cut off, and then welding the chamfered first waterproof coiled material to the second waterproof coiled material.

[0021] Optionally, after pasting the isolation layer, a secondary lining structure is constructed on the side of the first waterproofing membrane close to the inside of the tunnel, so as to form a grouting channel between the secondary lining structure and the isolation layer.

[0022] Optionally, the tunnel includes a main tunnel and a cross tunnel. Before laying the first waterproofing membrane on the arch wall of the main tunnel and on the arch wall of the cross tunnel, a waterproof connector is installed at the intersection of the main tunnel and the cross tunnel;

[0023] The waterproof connector includes a plugging part and a wing part. The plugging part is arc-shaped. The wing part is arranged on the outer periphery of one end of the plugging part. An adhesive layer is arranged on the inner peripheral surface of the plugging part and on the surface of the wing part away from the plugging part;

[0024] The plugging part is inserted into the cross tunnel so as to be attached to the inner wall of the arch wall of the cross tunnel, and the wing part is attached to the inner wall of the arch wall of the main tunnel after the plugging part is inserted into the cross tunnel.

[0025] Optionally, when laying the first waterproofing membrane in the main tunnel, the part of the first waterproofing membrane close to the cross tunnel is pasted on the wing part; when laying the first waterproofing membrane in the cross tunnel, the part of the first waterproofing membrane close to the main tunnel is pasted on the plugging part.

[0026] The present invention provides a tunnel waterproof structure and method, and its beneficial effects are as follows:

[0027] 1. The flashing part between the second overlapping edge and the second waterproofing membrane is cut off, so that the first strip-shaped welding part is exposed, and the water channel formed by the flashing part is eliminated when the first waterproofing membrane and the second waterproofing membrane overlap, improving the waterproof effect at the T-shaped joint;

[0028] 2. The setting of the isolation layer can avoid the multi-point distributed de-bonding situation between the top of the tunnel arch wall and the secondary lining structure during the construction of the pre-laid and self-adhered waterproofing membrane and the pre-laid and self-adhered construction method, resulting in the need to arrange a large number of grouting pipes and it is difficult to ensure the grouting effect. The pre-laid waterproofing membrane at the position of the isolation layer is not adhered to the secondary lining structure, and a grouting channel can be formed between the isolation layer and the secondary lining structure. By injecting grouting liquid through one such grouting channel, the grouting of the tunnel can be realized, and the grouting is convenient and the grouting effect is good;

[0029] 3. The waterproof connector can be inserted and connected to the cross tunnel through the insertion part and fit against the inner wall of the main tunnel through the wing part. In this way, when laying the first waterproof coiled material in the cross tunnel, the part of the first waterproof coiled material close to the main tunnel can be directly pasted on the insertion part, and when laying the first waterproof coiled material in the main tunnel, the part of the first waterproof coiled material close to the cross tunnel can be directly pasted on the wing part. This not only facilitates the laying construction of the first waterproof coiled material at the connection position between the cross tunnel and the main tunnel, but also provides the waterproof effect at this position.

[0030] Other features and advantages of the present invention will be described in detail in the following specific implementation part. Brief Description of the Drawings

[0031] By describing the exemplary embodiments of the present invention in more detail in conjunction with the drawings, the above and other objects, features and advantages of the present invention will become more obvious. Among them, in the exemplary embodiments of the present invention, the same reference numerals generally represent the same components.

[0032] Figure 1 The schematic diagram of the waterproof structure at the T-shaped joint of the first waterproof coiled material and the second waterproof coiled material of a tunnel waterproof structure according to an embodiment of the present invention is shown.

[0033] Figure 2 The schematic diagram of the overlapping structure of adjacent first waterproof coiled materials of a tunnel waterproof structure according to an embodiment of the present invention is shown.

[0034] Figure 3 The schematic diagram of the tunnel cross-section structure of a tunnel waterproof structure according to an embodiment of the present invention is shown.

[0035] Figure 4 The schematic diagram of the top view position of the paste of the isolation layer of a tunnel waterproof structure according to an embodiment of the present invention is shown.

[0036] Figure 5 The schematic diagram of the structure of the waterproof connector of a tunnel waterproof structure according to an embodiment of the present invention is shown.

[0037] Figure 6 The schematic diagram of the installation position of the waterproof connector of a tunnel waterproof structure according to an embodiment of the present invention is shown.

[0038] Figure 7 The flowchart of a tunnel waterproof method according to an embodiment of the present invention is shown.

[0039] Description of the Reference Numerals:

[0040] 1. First waterproof coiled material; 2. First overlapping edge; 3. First strip-shaped welding part; 4. Flange part; 5. Second waterproof coiled material; 6. Second overlapping edge; 7. Second strip-shaped welding part; 8. Chamfer; 9. Isolation layer; 10. Secondary lining structure; 11. Grouting channel; 12. Grouting pipe; 13. Main tunnel; 14. Cross tunnel; 15. Insertion part; 16. Wing part; 17. Adhesive layer; 18. Tunnel. Detailed implementation manners

[0041] The preferred implementation manners of the present invention will be described in more detail below. Although the preferred implementation manners of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the implementation manners set forth herein. On the contrary, these implementation manners are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0042] The present invention provides a tunnel waterproof structure, and the waterproof structure includes:

[0043] A first waterproof coiled material, which is laid on the tunnel arch wall. Two adjacent first waterproof coiled materials are overlapped through their first overlapping edges, and the two mutually overlapped first overlapping edges are connected through a first strip-shaped welding part. The first waterproof coiled material forms a flange part outside the first strip-shaped welding part;

[0044] A second waterproof coiled material, which is laid on the tunnel invert and overlaps with the second overlapping edge of the first waterproof coiled material. The second waterproof coiled material is connected to the second overlapping edge through a second strip-shaped welding part, and the second strip-shaped welding part is perpendicular to the first strip-shaped welding part;

[0045] The flange part between the second overlapping edge and the second waterproof coiled material is cut off.

[0046] Specifically, the number of the first waterproof coiled materials is set according to needs. Two adjacent first waterproof coiled materials are overlapped through their first overlapping edges and then welded by a welding machine. When welding, a first strip-shaped welding part is generated, and since the welding roller inevitably needs to maintain a certain distance from the edge of the first waterproof coiled material during welding, the upper first waterproof coiled material and the lower first waterproof coiled material at this part both form non-adhesive flange parts outside the first strip-shaped welding part. The flange part will form a water channel between the second overlapping edge of the first waterproof coiled material and the second waterproof coiled material, which is prone to leakage. And the flange part between the second overlapping edge and the second waterproof coiled material of this waterproof structure is cut off, so that the first strip-shaped welding part is exposed, eliminating the water channel formed by the flange part when the first waterproof coiled material and the second waterproof coiled material are overlapped, and improving the waterproof effect at the T-shaped joint formed by the first waterproof coiled material on the tunnel arch wall and the second waterproof coiled material on the tunnel invert.

[0047] Optionally, two first overlapping edges that overlap each other are connected by two first strip-shaped welding parts, and the two first strip-shaped welding parts are parallel to each other.

[0048] Specifically, the first strip-shaped welding part is a hot melt weld formed by a welding machine when welding two first waterproof coiled materials. When a double-weld welding machine is used for welding, double welds are produced.

[0049] Optionally, the first overlapping edge is the long-side overlapping edge of the first waterproof coiled material, and the second overlapping edge is the short-side overlapping edge of the first waterproof coiled material.

[0050] Specifically, the overlapping edge in the length direction of the first waterproof coiled material is the long-side overlapping edge, and the overlapping edge in the width direction of the first waterproof coiled material is the short-side overlapping edge.

[0051] Optionally, the second overlapping edge overlaps on the long-side overlapping edge of the second waterproof coiled material.

[0052] Specifically, the overlapping edge in the length direction of the second waterproof coiled material is the long-side overlapping edge, and the length direction of the second waterproof coiled material is perpendicular to the length direction of the first waterproof coiled material.

[0053] Optionally, the second waterproof coiled material and the second overlapping edge are connected by two second strip-shaped welding parts, and the two second strip-shaped welding parts are parallel to each other.

[0054] Specifically, the second strip-shaped welding part is a hot melt weld formed by a welding machine when welding two first waterproof coiled materials. When a double-weld welding machine is used for welding, double welds are produced.

[0055] Optionally, it further includes an isolation layer. The isolation layer is strip-shaped and is pasted along the axial direction of the tunnel on one side of the first waterproof coiled material at the top of the tunnel arch wall close to the tunnel invert.

[0056] Specifically, since it is difficult to form a dense connection between the secondary lining structure in the tunnel and the pre-laid and self-adhered waterproof coiled material during the construction of the secondary lining structure in the tunnel, when the first waterproof coiled material uses the pre-laid and self-adhered waterproof coiled material, a multi-point distributed de-bonding adhesion situation is formed between the secondary lining structure and the pre-laid and self-adhered waterproof coiled material. When grouting is carried out for this multi-point distributed de-bonding adhesion situation, not only the number of grouting pipes required is large, but also the grouting effect is difficult to guarantee; this waterproof structure sets an isolation layer on the self-adhesive side of the pre-laid and self-adhered waterproof coiled material at the middle position of the top of the tunnel arch wall, so that the pre-laid and self-adhered waterproof coiled material at the position of the isolation layer is not adhered to the secondary lining structure, and a grouting channel is formed between the isolation layer and the secondary lining structure. By injecting grouting liquid through one such grouting channel, the grouting of the tunnel can be realized, and the grouting is convenient and the grouting effect is good.

[0057] It should be noted that the grouting of the tunnel is an essential part of the tunnel construction standard. For the grouting of this tunnel, a grouting channel is necessarily formed between the secondary lining structure and the isolation layer.

[0058] Optionally, a grouting pipe is provided in the secondary lining structure, and the grouting pipe is communicated with the grouting channel.

[0059] Specifically, grouting liquid can be injected into the grouting channel through the grouting pipe.

[0060] Optionally, the secondary lining structure is provided with multiple segments, and one grouting pipe is provided on each segment of the secondary lining structure.

[0061] Specifically, the multiple segments of the secondary lining structure are arranged in sequence along the axial direction of the tunnel, and only one grouting pipe needs to be provided on each segment of the secondary lining structure to meet the grouting at the position of this segment of the secondary lining structure.

[0062] Optionally, the pre-laid and self-adhered waterproofing membrane is a pre-laid and self-adhered waterproofing membrane with a self-adhesive isolation film. The isolation films on both sides of the crown of the pre-laid and self-adhered waterproofing membrane are cut off, and the isolation film in the middle of the crown is reserved to form the isolation layer.

[0063] Optionally, the pre-laid and self-adhered waterproofing membrane is a coating type pre-laid and self-adhered waterproofing membrane.

[0064] Optionally, the pre-laid and self-adhered waterproofing membrane is a pre-laid and self-adhered waterproofing membrane without an isolation film, and an isolation layer is adhered to the self-adhesive side in the middle of the crown of the pre-laid and self-adhered waterproofing membrane through an adhesive.

[0065] Optionally, the pre-laid and self-adhered waterproofing membrane is a sand layer type pre-laid and self-adhered waterproofing membrane.

[0066] Optionally, grouting filler is injected into the grouting channel.

[0067] Optionally, the width of the isolation layer is at least 400 mm.

[0068] Specifically, the isolation layer is not adhered to the secondary lining structure, and a through-type grouting channel is formed between the isolation layer and the secondary lining structure, which is convenient for grouting and can improve the grouting effect.

[0069] Optionally, the secondary lining structure includes secondary lining concrete.

[0070] Specifically, the secondary lining structure is formed by pouring secondary lining concrete.

[0071] Optionally, the second overlapping edge is located on the lower side of the second waterproofing membrane, and a chamfer is provided at the edge of the first waterproofing membrane in contact with the second waterproofing membrane.

[0072] Specifically, the lapped part of the first waterproof coil on the tunnel arch wall is pressed under the lapped part of the second waterproof coil. The chamfer is provided so that when the first waterproof coil overlaps with the second waterproof coil, the edge of the first waterproof coil contacts the second waterproof coil more smoothly. The exposed first strip-shaped welded part can form a connection with the second strip-shaped welded part, avoiding the formation of bulges at the overlapping position.

[0073] Optionally, a secondary lining structure is provided on the side of the first waterproof coil close to the inside of the tunnel, and a grouting channel is formed between the secondary lining structure and the isolation layer.

[0074] Optionally, the tunnel includes a main tunnel and a cross tunnel. A waterproof connector is provided at the intersection of the main tunnel and the cross tunnel. The waterproof connector includes a plug-in part and a wing part. The plug-in part is arc-shaped. The plug-in part is inserted into the cross tunnel and can fit with the inner wall of the arch wall of the cross tunnel. The wing part is arranged on the outer periphery of one end of the plug-in part. After the plug-in part is inserted into the cross tunnel, the wing part fits with the inner wall of the arch wall of the main tunnel. An adhesive layer is provided on the inner peripheral surface of the plug-in part and on the surface of the wing part away from the plug-in part.

[0075] Specifically, the plug-in connection with the cross tunnel is achieved through the plug-in part, and the inner wall of the arch wall of the main tunnel is fitted through the wing part. Adhesive layers are provided on the inner peripheral surface of the plug-in part and on the surface of the wing part away from the plug-in part. In this way, when laying the waterproof coil in the cross tunnel, the waterproof coil can be directly pasted on the plug-in part, and when laying the waterproof coil in the main tunnel, the waterproof coil can be directly pasted on the wing part. This not only facilitates the laying construction of the waterproof coil at the connection position between the cross tunnel and the main tunnel but also provides the waterproof effect at this position.

[0076] Optionally, the waterproof connector is made of a polymer material.

[0077] Specifically, the waterproof connector made of the polymer material itself has a waterproof effect. The connection between the waterproof coil laid in the cross tunnel and the waterproof coil laid in the main tunnel at the connection position between the cross tunnel and the main tunnel is realized by this waterproof connector, which facilitates construction and ensures the waterproof effect at this position.

[0078] Optionally, the wing part is sheet-shaped, and the shape of the surface of the wing part away from the plug-in part matches the shape of the inner wall of the arch wall of the main tunnel.

[0079] Specifically, the wing part is a sheet-shaped part that is shaped according to the inner wall radian at the connection position between the main tunnel and the cross tunnel. The wing part can be relatively thin, which is beneficial for smooth connection with the waterproof coil laid in the main tunnel. The plug-in part is also an arc-shaped sheet, and the wall thickness of the plug-in part is also relatively thin, which is beneficial for smooth connection with the waterproof coil laid in the cross tunnel.

[0080] Optionally, an isolation film is provided on the outer side of the adhesive layer.

[0081] Specifically, the adhesive layer and the release film thereon can not only prevent the waterproof connector from being damaged or soiled during installation, but also facilitate the connection between the waterproof coiled material and the waterproof connector through the adhesive layer.

[0082] Optionally, the material of the waterproof connector for the tunnel is at least one of PE material, EPDM material, TPO material, PVC material, EVA material, and ECB material.

[0083] Optionally, the material of the adhesive layer is at least one of SBC hot melt pressure-sensitive adhesive, polyisobutylene-based adhesive, butyl-based adhesive, and acrylic-based adhesive.

[0084] Optionally, the insertion part is adapted to the inner shape of the arch wall part of the cross tunnel.

[0085] Specifically, the outer shape of the insertion part is conformally arranged with respect to the inner shape of the arch wall part of the cross tunnel, which facilitates the waterproof connection between the insertion part and the inner side of the arch wall part of the cross tunnel through the hot melt gasket.

[0086] Optionally, the wing part is adapted to the inner shape of the arch wall part of the main tunnel.

[0087] Specifically, the shape of the wing part is conformally arranged with respect to the inner shape of the arch wall part of the main tunnel, which facilitates the waterproof connection between the wing part and the inner side of the arch wall part of the main tunnel through the hot melt gasket.

[0088] Optionally, the part of the first waterproof coiled material laid on the arch wall of the main tunnel near the cross tunnel is bonded to the wing part, and the part of the first waterproof coiled material laid on the arch wall of the cross tunnel near the main tunnel is bonded to the insertion part.

[0089] Optionally, the insertion part is connected to the arch wall of the cross tunnel through the first hot melt gasket, and the wing part is connected to the arch wall of the main tunnel through the second hot melt gasket.

[0090] Specifically, the waterproof connector realizes the waterproof connection with the cross tunnel and the main tunnel through the first hot melt gasket and the second hot melt gasket.

[0091] The present invention also provides a tunnel waterproofing method. Based on the above tunnel waterproofing structure, the waterproofing method includes:

[0092] Laying the first waterproof coiled material and the second waterproof coiled material on the tunnel arch wall and the tunnel invert respectively;

[0093] Welding the adjacent first waterproof coiled materials through the first strip-shaped welding part, and forming a flange part outside the first strip-shaped welding part;

[0094] Cutting off part of the flange part close to the second waterproof coiled material;

[0095] The first waterproof coiled material with part of its flashings removed is welded to the second waterproof coiled material through the second strip-shaped welding part.

[0096] Optionally, it further includes:

[0097] An isolation layer is provided at the top of the arch wall of the tunnel.

[0098] Optionally, chamfers are cut at the edges of the first waterproof coiled material where part of its flashings have been removed, and then the first waterproof coiled material with chamfers cut is welded to the second waterproof coiled material.

[0099] Optionally, after pasting the isolation layer, a secondary lining structure is constructed on the side of the first waterproof coiled material close to the inside of the tunnel, so that a grouting channel is formed between the secondary lining structure and the isolation layer.

[0100] Optionally, the tunnel includes a main tunnel and a cross tunnel. Before laying the first waterproof coiled material on the arch wall of the main tunnel and on the arch wall of the cross tunnel, a waterproof connector is installed at the intersection of the main tunnel and the cross tunnel;

[0101] The waterproof connector includes a plug-in part and a wing part. The plug-in part is arc-shaped, the wing part is arranged on the outer periphery of one end of the plug-in part, and adhesive layers are provided on the inner peripheral surface of the plug-in part and on the surface of the wing part far from the plug-in part;

[0102] The plug-in part is inserted into the cross tunnel so that it fits against the inner wall of the arch wall of the cross tunnel, and the wing part fits against the inner wall of the arch wall of the main tunnel after the plug-in part is inserted into the cross tunnel.

[0103] Optionally, when laying the first waterproof coiled material in the main tunnel, the part of the first waterproof coiled material close to the cross tunnel is pasted on the wing part; when laying the first waterproof coiled material in the cross tunnel, the part of the first waterproof coiled material close to the main tunnel is pasted on the plug-in part.

[0104] Embodiment

[0105] As Figures 1 to 7 shown, the present invention provides a tunnel waterproof structure, and this waterproof structure includes:

[0106] A first waterproof coiled material 1, laid on the arch wall of the tunnel. Two adjacent first waterproof coiled materials 1 are overlapped through their first overlapping edges 2, and the two mutually overlapped first overlapping edges 2 are connected through a first strip-shaped welding part 3. The first waterproof coiled material 1 forms a flashing part 4 outside the first strip-shaped welding part 3;

[0107] A second waterproof coiled material 5, laid on the invert of the tunnel and overlapped with the second overlapping edge 6 of the first waterproof coiled material 1. The second waterproof coiled material 5 is connected to the second overlapping edge 6 through a second strip-shaped welding part 7, and the second strip-shaped welding part 7 is perpendicular to the first strip-shaped welding part 3;

[0108] The flash part 4 between the second lapping edge 6 and the second waterproof coiled material 5 is cut off.

[0109] In this embodiment, it further includes an isolation layer 9. The isolation layer 9 is strip-shaped and is adhesively attached along the axial direction of the tunnel to one side of the first waterproof coiled material 1 at the top of the tunnel arch wall close to the tunnel invert.

[0110] In this embodiment, the second lapping edge 6 is located at the lower side of the second waterproof coiled material 5, and a chamfer 8 is provided at the edge of the first waterproof coiled material 1 in contact with the second waterproof coiled material 5.

[0111] In this embodiment, a secondary lining structure 10 is provided on the side of the first waterproof coiled material 1 close to the interior of the tunnel, and a grouting channel 11 is formed between the secondary lining structure 10 and the isolation layer 9.

[0112] In this embodiment, the tunnel 18 includes a main tunnel 13 and a cross tunnel 14. A waterproof connecting piece is provided at the intersection of the main tunnel 13 and the cross tunnel 14. The waterproof connecting piece includes a plugging part 15 and a wing part 16. The plugging part 15 is arc-shaped, the plugging part 15 is inserted into the cross tunnel 14 and can be fitted with the inner wall of the arch wall of the cross tunnel 14. The wing part 16 is arranged on the outer periphery of one end of the plugging part 15, and the wing part 16 is fitted with the inner wall of the arch wall of the main tunnel 13 after the plugging part 15 is inserted into the cross tunnel 14. An adhesive layer 17 is provided on the inner peripheral surface of the plugging part 15 and the surface of the wing part 16 away from the plugging part 15.

[0113] In this embodiment, the part of the first waterproof coiled material 1 laid on the arch wall of the main tunnel 13 close to the cross tunnel 14 is adhesively attached to the wing part 16, and the part of the first waterproof coiled material 1 laid on the arch wall of the cross tunnel 14 close to the main tunnel 13 is adhesively attached to the plugging part 15.

[0114] The present invention also provides a tunnel waterproofing method. Based on the above tunnel waterproofing structure, the waterproofing method includes:

[0115] Lay the first waterproof coiled material 1 on the tunnel arch wall and the second waterproof coiled material 5 on the tunnel invert respectively;

[0116] Weld the adjacent first waterproof coiled materials 1 through the first strip-shaped welding part 3, and form a flash part 4 outside the first strip-shaped welding part 3;

[0117] Cut off the part of the flash part 4 close to the second waterproof coiled material 5;

[0118] Weld the first waterproof coiled material 1 with the part of the flash part 4 cut off to the second waterproof coiled material 5 through the second strip-shaped welding part 7.

[0119] Optionally, it further includes:

[0120] Set an isolation layer 9 at the top of the tunnel arch wall.

[0121] In this embodiment, chamfers 8 are cut on the edges of the first waterproof coiled material 1 from which part of the flashings 4 have been removed, and then the first waterproof coiled material 1 after the chamfers 8 are cut is welded to the second waterproof coiled material 5.

[0122] In this embodiment, after the isolation layer 9 is pasted, a secondary lining structure 10 is constructed on the side of the first waterproof coiled material 1 close to the inside of the tunnel, so that a grouting channel 11 is formed between the secondary lining structure 10 and the isolation layer 9.

[0123] In this embodiment, the tunnel 18 includes a main tunnel 13 and a cross tunnel 14. Before the first waterproof coiled material 1 is laid on the arch walls of the main tunnel 13 and the cross tunnel 14, a waterproof connector is installed at the intersection of the main tunnel 13 and the cross tunnel 14;

[0124] The waterproof connector includes a plug-in part 15 and a wing part 16. The plug-in part 15 is arc-shaped. The wing part 16 is arranged on the outer periphery of one end of the plug-in part 15. An adhesive layer 17 is arranged on the inner peripheral surface of the plug-in part 15 and the surface of the wing part 16 away from the plug-in part 15.

[0125] The plug-in part 15 is inserted into the cross tunnel 14 to make it fit with the inner wall of the arch wall of the cross tunnel 14, and the wing part 16 fits with the inner wall of the arch wall of the main tunnel 13 after the plug-in part 15 is inserted into the cross tunnel 14.

[0126] In this embodiment, when the first waterproof coiled material 1 is laid in the main tunnel 13, the part of the first waterproof coiled material 1 close to the cross tunnel 14 is pasted on the wing part 16; when the first waterproof coiled material 1 is laid in the cross tunnel 14, the part of the first waterproof coiled material 1 close to the main tunnel 13 is pasted on the plug-in part 15.

[0127] In summary, the tunnel waterproofing method provided by the present invention is based on the waterproof structure of the above-mentioned tunnel. During construction, the pre-laid reverse-adhesive membrane and the pre-laid reverse-adhesive construction method are used as examples: the first waterproof membrane 1 and the second waterproof membrane 5 are both pre-laid reverse-adhesive waterproof membranes. First, the waterproof connector is installed at the junction of the main tunnel 13 and the cross tunnel 14, and the plug-in portion 15 is inserted into the cross tunnel 14. The waterproof connector is fixed to the connection between the cross tunnel 14 and the main tunnel 13 by the first hot-melt gasket and the second hot-melt gasket, and then the isolation film on the adhesive layer 17 is torn off to expose the adhesive layer 17; then, the first waterproof membrane 1 is pre-laid on the arch wall of the main tunnel 13 and the arch wall of the cross tunnel 14, and the second waterproof membrane 5 is pre-laid on the inverted arch of the main tunnel 13 and the inverted arch of the cross tunnel 14; When laying the first waterproofing membrane 1 in the horizontal hole 13, the portion of the first waterproofing membrane 1 close to the horizontal hole 14 is pasted on the wing 16; when laying the first waterproofing membrane 1 in the horizontal hole 14, the portion of the first waterproofing membrane 1 close to the main tunnel 13 is pasted on the plug-in portion 15; two adjacent first waterproofing membranes 1 are welded through their first overlapping edges 2 by a double-weld welding machine, and two first strip-shaped welding portions 3 and a flash portion 4 parallel to each other are generated during welding; the flash portion 4 close to the second waterproofing membrane 5 is cut off, and the first waterproofing membrane 1 is placed on the A chamfer 8 is cut out of the edge of the partially cut flash portion 4, and then the first waterproof membrane 1 after cutting the chamfer 8 is welded to the second waterproof membrane 5 by two mutually parallel second strip welding portions 7 formed by a double-weld welder; then, an isolation layer 9 is set in the middle position of the top of the arch wall of the main tunnel 13 and the middle position of the top of the arch wall of the cross tunnel 14. Since the pre-laid reverse-adhesive waterproof membrane is used, it is only necessary to cut out the strip-shaped isolation layer 9 structure when peeling off the release film on the pre-laid reverse-adhesive waterproof membrane, and then the isolation layer 9 structure except for the release film as the first layer is cut out. The release film of the isolation layer 9 is peeled off; finally, the secondary lining structure 10 is constructed. Due to the existence of the isolation layer 9, the pre-laid reverse-adhesive waterproof membrane at the position of the isolation layer 9 is not bonded to the secondary lining structure 10, and a grouting channel 11 is formed between the isolation layer 9 and the secondary lining structure 10, which facilitates grouting and improves the grouting effect; the secondary lining structure 10 is formed by pouring secondary lining concrete and constructed in sections, and a grouting pipe 12 is buried in each section of the secondary lining structure 10, and the grouting construction of the tunnel vault can be completed by injecting grouting filler into the grouting pipe 12.

[0128] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A tunnel waterproof structure, characterized in that, The waterproof structure includes: A first waterproof coiled material, which is laid on the arch wall of the tunnel. Two adjacent first waterproof coiled materials are overlapped through their first overlapping edges, and two mutually overlapped first overlapping edges are connected through a first strip-shaped welding part. The first waterproof coiled material forms a flanging part outside the first strip-shaped welding part. A second waterproof coiled material, which is laid on the invert of the tunnel and overlaps with the second overlapping edge of the first waterproof coiled material. The second waterproof coiled material is connected to the second overlapping edge through a second strip-shaped welding part, and the second strip-shaped welding part is perpendicular to the first strip-shaped welding part. The flanging part between the second overlapping edge and the second waterproof coiled material is cut off. The tunnel includes a main tunnel and a cross tunnel. A waterproof connecting piece is arranged at the intersection of the main tunnel and the cross tunnel. The waterproof connecting piece includes a plug-in part and a wing part. The plug-in part is arc-shaped. The plug-in part is inserted into the cross tunnel and can be attached to the inner wall of the arch wall of the cross tunnel. The wing part is arranged on the outer periphery of one end of the plug-in part. After the plug-in part is inserted into the cross tunnel, the wing part is attached to the inner wall of the arch wall of the main tunnel. An adhesive layer is arranged on the inner peripheral surface of the plug-in part and the surface of the wing part far away from the plug-in part.

2. The tunnel waterproof structure according to claim 1, characterized in that It further includes an isolation layer. The isolation layer is strip-shaped and is adhesively attached along the axial direction of the tunnel to the side of the first waterproof coiled material near the invert of the tunnel at the top of the arch wall of the tunnel.

3. The tunnel waterproof structure according to claim 2, characterized in that, A secondary lining structure is arranged on the side of the first waterproof coiled material close to the inside of the tunnel, and a grouting channel is formed between the secondary lining structure and the isolation layer.

4. The tunnel waterproof structure according to claim 1, characterized in that, The part of the first waterproof coiled material laid on the arch wall of the main tunnel close to the cross tunnel is adhesively attached to the wing part, and the part of the first waterproof coiled material laid on the arch wall of the cross tunnel close to the main tunnel is adhesively attached to the plug-in part.

5. A tunnel waterproofing method, based on the tunnel waterproofing structure according to any one of claims 1-4, characterized in that, The waterproof method includes: Install a waterproof connecting piece at the intersection of the main tunnel and the cross tunnel, insert the plug-in part into the cross tunnel to make it fit with the inner wall of the arch wall of the cross tunnel, and the wing part fits with the inner wall of the arch wall of the main tunnel after the plug-in part is inserted into the cross tunnel. Lay the first waterproof coiled material on the arch wall of the tunnel and the second waterproof coiled material on the invert of the tunnel respectively. Weld the adjacent first waterproof coiled materials through a first strip-shaped welding part, and form a flanging part outside the first strip-shaped welding part. Cut off part of the flanging part close to the second waterproof coiled material. Weld the first waterproof coiled material with part of the flanging part cut off to the second waterproof coiled material through a second strip-shaped welding part.

6. The tunnel waterproofing method according to claim 5, characterized in that, It further includes: Set an isolation layer at the top of the arch wall of the tunnel.

7. The tunnel waterproofing method according to claim 6, characterized in that, After pasting the isolation layer, construct a secondary lining structure on the side of the first waterproof coiled material close to the inside of the tunnel, so that a grouting channel is formed between the secondary lining structure and the isolation layer.

8. The tunnel waterproofing method according to claim 5, characterized in that, When laying the first waterproof coiled material in the main tunnel, paste the part of the first waterproof coiled material close to the cross tunnel on the wing part; when laying the first waterproof coiled material in the cross tunnel, paste the part of the first waterproof coiled material close to the main tunnel on the plug-in part.

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