Pre-embedded shield tunnel leakage plugging system and method of using the same

Abstract

The application discloses a pre-embedded shield tunnel leakage plugging system and method, in which a shield tunnel leakage plugging device is pre-embedded on a segment during segment prefabrication, and is flexibly combined into various plugging modes according to required plugging conditions and segment structures; when leakage occurs in the tunnel, water-absorbing and swelling materials in elastic film bags absorb water and swell, so as to form a dense waterproof layer with high viscosity, high anti-permeability and flexibility; meanwhile, the water-absorbing and swelling materials after the elastic film bags are broken enter into a joint gap of the segment, can further absorb water and swell and fill, so as to plug leakage points of an original waterproof system and improve waterproof capacity of the original waterproof system.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of shield construction. More particularly, the present application relates to a pre-embedded shield tunnel leakage plugging system and a method of using the same. BACKGROUND

[0002] The construction of the existing waterproof system is affected by multiple links such as material pasting and segment assembly, each link affects the waterproof ability of the segment joint, the waterproof construction quality control is difficult, and the risk of failure of the waterproof system is high. At present, the shield tunnel waterproof is generally based on EPDM, and the EPDM is compressed during the segment assembly process, and the water is stopped through the indirect contact stress of the rubber strip. In order to improve the waterproof ability of the tunnel, a double waterproof is used for a large shield, and the EPDM water-activated expansion rubber is arranged on the outside. The water-activated expansion strip expands and compresses each other in the process of contacting with underground water, so as to achieve the purpose of stopping water. However, the expansion direction of the water-activated expansion rubber strip is uncontrollable, and the performance will deteriorate sharply in the process of dry-wet alternation. In addition, affected by the segment misalignment and opening, the failure rate of the water-activated expansion and the EPDM rubber strip is high, resulting in that the tunnel is leaking in nine out of ten during the operation period. At present, the leakage is generally plugged by manually opening holes and injecting chemical slurry, which has high construction cost, low construction efficiency, and the index is not a permanent solution. The leakage points are often fluctuating, resulting in high tunnel operation cost. SUMMARY

[0003] An object of the present application is to solve at least the above problems and to provide at least the advantages to be described later.

[0004] Another object of the present application is to provide a pre-embedded shield tunnel leakage plugging system and a method of using the same, to solve the technical problems of poor waterproof ability and poor durability of the waterproof system between the segments in the prior art.

[0005] In order to achieve these objects and other advantages according to the present application, a pre-embedded shield tunnel leakage plugging system is provided, which is provided with a rubber waterproof layer on the side surface of the segment, comprising:

[0006] A reserved groove is provided on the side surface of the segment and arranged along the circumferential direction of the segment, and the reserved groove is located on the outside of the rubber waterproof layer.

[0007] A plugging assembly is provided, which comprises an elastic film bag, the elastic film bag is connected in the reserved groove and is arranged in sequence and closely along the extension direction of the reserved groove, the elastic film bag is a water-permeable type film bag, the elastic film bag is filled with a water-absorbing and expanding material, the surface of the elastic film bag on the side of the reserved groove is flush with the opening of the reserved groove and is sealed and covered with a waterproof protective film, and the waterproof protective film is detachably connected with each elastic film bag.

[0008] Preferably, each of the elastic film bags is further provided with a cuboid-shaped shell, the shell is fixedly connected with the reserved groove, the height of the shell is consistent with the height of the reserved groove and the shell is open on the side facing out of the reserved groove, each of the elastic film bags is filled in the interior of one shell, and the waterproof protective film is detachably connected to one side of the opening of the shell.

[0009] Preferably, the opening of the shell is hingedly connected with a movable baffle on each side in the length direction of the reserved groove.

[0010] Preferably, the water-absorbing and swelling material comprises a clay material mixed with a flocculating agent.

[0011] Preferably, the elastic film bag is made of water-soluble material.

[0012] The application further provides a use method of the pre-buried shield tunnel leakage plugging system.

[0013] S1, when prefabricating the segment, one reserved groove is arranged on each of the four sides of the segment;

[0014] S2, the elastic film bags are installed in the reserved groove, and a layer of waterproof protective film is sealed and covered on the surface of all the elastic film bags to prevent water from penetrating in during the prefabrication and transportation of the segment;

[0015] S3, the segment is flushed, the waterproof protective film is torn off before the segment is assembled, and then the segment is assembled;

[0016] S4, when water seeps into the joint gap of the segment, the water contacts the elastic film bags and penetrates into the elastic film bags, the water-absorbing and swelling material swells after absorbing water, and the corresponding elastic film bag swells into the joint gap of the segment to form a dense waterproof layer to block the groundwater.

[0017] Preferably, a rubber waterproof layer and a reserved groove are sequentially arranged on the segment in the radial direction, the elastic film bags made of non-water-soluble material are arranged in the reserved groove, and the shell and the movable baffle are arranged on the outer side of the elastic film bags to jointly form an extrusion type waterproof leakage plugging system to block the groundwater, and the movable baffles on both sides of the shell are opened after the corresponding elastic film bags swell to limit the swelling direction of the elastic film bags.

[0018] Preferably, two said rubber waterproof layers and one said reserved groove are arranged on the segment, the reserved groove is located between the two said rubber waterproof layers, the elastic film bag made of water-soluble material is arranged in the reserved groove, and a filling type waterproof and leakage plugging system is formed, groundwater is blocked, and seepage water penetrates into the elastic film bag, the water-absorbing and swelling material swells and expands the elastic film bag, and at the same time, the elastic film bag starts to dissolve when contacting the seepage water until it is broken, the water-absorbing and swelling material on the inside enters the joint gap of the segment, swells and coagulates after contacting water, and the seepage channel is blocked.

[0019] Preferably, one said rubber waterproof layer and two said reserved grooves are arranged on the segment in sequence, the elastic film bag made of non-water-soluble material and the shell and the movable baffle are arranged in the outer reserved groove, the elastic film bag made of water-soluble material is arranged in the inner reserved groove, and a composite type waterproof and leakage plugging system is formed, groundwater is blocked, the elastic film bag in the outer reserved groove swells along with the water-absorbing and swelling material on the inside after penetrating water, and the gap is blocked, the elastic film bag in the inner reserved groove gradually dissolves when contacting seepage water, and the corresponding water-absorbing and swelling material enters the gap between the rubber waterproof layer and the outer reserved groove of the segment for filling.

[0020] The present application at least includes the following beneficial effects:

[0021] (1) The pre-embedded shield tunnel leakage plugging system can swell when the tunnel leaks water, further forms a dense waterproof layer on the basis of the original rubber waterproof layer, and significantly improves the waterproof capacity of the tunnel without changing the original waterproof system.

[0022] (2) In addition to the waterproof capacity of the pre-embedded shield tunnel leakage plugging system itself, the system can also fill the possible gap between the two original rubber waterproof layers after the elastic film bag is broken, and improve the waterproof capacity of the original waterproof system.

[0023] (3) The pre-embedded shield tunnel leakage plugging system will not be affected in waterproof system integrity when the segment floats and expands, and the dense waterproof layer formed by the elastic film bag and the water-absorbing and swelling material has thixotropy and can adapt to the long-term deformation of the operating tunnel.

[0024] (4) The pre-embedded shield tunnel leakage plugging system can be set according to the prefabrication and embedding construction of the segment, has good waterproof performance and high stability, is cheaper than the way of punching treatment of leakage in the later stage, and reduces the construction cost.

[0025] Other advantages, objects, and features of the present application will be apparent from the following description, and will be understood by those skilled in the art. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 Structure diagram of pipe segment for one embodiment of the present application;

[0027] Figure 2 Structure diagram of plugging assembly for one embodiment of the present application;

[0028] Figure 3 Structure diagram of plugging assembly for one embodiment of the present application after water absorption;

[0029] Figure 4 Structure diagram of setting mode for one embodiment of the pre-embedded shield tunnel leakage plugging system of the present application;

[0030] Figure 5 Structure diagram of setting mode for another embodiment of the pre-embedded shield tunnel leakage plugging system of the present application;

[0031] Figure 6 Structure diagram of setting mode for another embodiment of the pre-embedded shield tunnel leakage plugging system of the present application.

[0032] Description of the drawings: 1, pipe segment, 2, first rubber waterproof layer, 3, first reserved groove, 4, second rubber waterproof layer, 5, shell, 6, movable baffle, 7, elastic film bag, 8, water-absorbing swelling material, 9, waterproof protective film, 10, second reserved groove, 11, pipe segment joint gap. DETAILED DESCRIPTION

[0033] The present application will be further described in detail below with reference to the accompanying drawings, so that those skilled in the art can implement the present application according to the description in the specification.

[0034] It should be noted that the experimental methods described in the following embodiments are all conventional methods unless otherwise specified, and the reagents and materials can be obtained from commercial channels unless otherwise specified; in the description of the present application, the terms "lateral", "longitudinal", "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 devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0035] As Figures 1-6 shown, the present application provides a pre-embedded shield tunnel leakage plugging system, which is provided with a rubber waterproof layer on the side surface of the pipe segment 1, comprising:

[0036] The reserved groove 3 is located outside the rubber waterproof layer 2, and the reserved groove 3 is located between the two rubber waterproof layers (2 and 4);

[0037] The leaking plugging assembly comprises elastic film bags 7, the elastic film bags 7 are connected in the reserved groove 3 and are arranged in sequence and closely along the extension direction of the reserved groove, the elastic film bag 7 is a water-permeable film bag, the elastic film bag 7 is filled with water-absorbing and swelling material 8, the outer side of each elastic film bag 7 is flush with the opening of the reserved groove 3 and is sealed and covered with a waterproof protective film 9, and the waterproof protective film 9 is detachably connected with each elastic film bag 7.

[0038] The embedded shield tunnel leakage plugging system is arranged on the segment 1, and the segment 1 is provided with a plurality of rubber waterproof layers according to the prior art, as shown in Figure 1 , two rubber waterproof layers are provided, the reserved groove is located between the two rubber waterproof layers (2 and 4), and the two rubber waterproof layers (2 and 4) form a new waterproof system, so that the overall waterproof capacity is significantly enhanced, the reserved groove is reserved during the production of the segment 1, does not occupy the space between the adjacent segments 1, ensures that the segments 1 are closely connected, and the elastic film bag 7 is fixed between the reserved groove and the inner wall during the production of the segment 1, and the part of the elastic film bag 7 exposed outside the segment 1 is pasted with the waterproof protective film 9, so that the elastic film bag 7 is prevented from being water-absorbed in advance, the waterproof protective film 9 is torn off when the segment 1 is prefabricated and is ready to be assembled, and then the segment 1 is installed, at this time, all the elastic film bags 7 are completely located in the reserved groove, the adjacent elastic film bags 7 abut against each other and the reserved groove, when water seeps into the joint gap 11 between the segments and the waterproof capacity of the rubber waterproof layer is insufficient, the water continues to seep between the two rubber waterproof layers, the seepage water contacts the elastic film bag 7 at the corresponding position, the elastic film bag 7 is a water-permeable film bag, the water contacts the water-absorbing and swelling material 8 in the elastic film bag 7, the water-absorbing and swelling material 8 swells, the elastic film bag 7 has elasticity and swells along with the water-absorbing and swelling material 8, the water-permeable elastic film bag 7 is limited in space by the adjacent elastic film bag 7 and the reserved groove, so that the elastic film bag 7 mainly swells towards the space between the segments 1, the two reserved grooves of the adjacent segments 1 are oppositely arranged, and the elastic film bags 7 at the corresponding positions in the two reserved grooves at the water seepage position can swell towards each other and then abut against each other, so that a dense waterproof layer is formed to block the water seepage.

[0039] In another technical scheme, as shown in Figures 2-4 , Figure 6 , the outer side of each elastic film bag 7 is further provided with a cuboid-shaped shell 5, the shell 5 is fixedly connected with the reserved groove 3, the height of the shell 5 is consistent with the height of the reserved groove and the side surface opening towards the outside of the reserved groove 3, each elastic film bag 7 is filled in the inside of one shell 5, and the waterproof protective film 9 is detachably connected with one side of the opening of the shell 5.

[0040] By setting the shell 5 outside the elastic film bag 7, the shape of the shell 5 is fixed, the shell 5 is convenient to fix with the reserved groove, and the corresponding side of the elastic film bag 7 is waterproofed and protected, the elastic film bag 7 is limited, and the elastic film bag 7 only absorbs water and expands in the direction of the opening of the shell 5, that is, the water seepage direction between the segments 1. When the segments 1 are prefabricated, the shell 5 is fixed on the segment 1 mold in advance, and the deformation of the plugging device can be prevented during the pouring and vibrating process of the segments 1.

[0041] In another technical solution, as shown in Figures 2-4 , Figure 6 The opening of the shell 5 is hinged with a movable baffle 6 on both sides in the length direction of the reserved groove.

[0042] The movable baffles 6 on both sides can rotate relative to the shell 5, and one movable baffle 6 is rotatably connected on each elastic film bag 7 in the left-right direction as shown in Figure 1 When the elastic film bag 7 is not water permeable, the movable baffles 6 on both sides are closed and cover the two sides of the exposed side of the elastic film bag 7, and the whole is rectangular. When the waterproof protection film is set, the waterproof protection film 9 can completely cover all the movable baffles 6, and is adhered to the movable baffles 6 to be convenient for tearing off in the later period. When water seeps, the elastic film bag 7 inside the movable baffle 6 is water permeable, the water absorbing and expanding material 8 absorbs water and expands, the elastic film bag 7 opens the movable baffles 6 on both sides, and the opening angle of the movable baffles 6 changes with the expansion of the corresponding elastic film bag 7. The expansion of the elastic film bag 7 to the left and right sides can be limited, which is beneficial to the mutual contact and extrusion between the relative elastic film bags 7 to form a dense waterproof layer. Further, the movable baffle 6 can be provided as a plurality of baffles that are rotatably connected in sequence to better adapt to the joint changes of the segments 1 and the expansion of the water absorbing and expanding material 8 in different sections.

[0043] In another technical solution, as shown in Figures 2-3 The water absorbing and expanding material 8 includes clay materials mixed with flocculants.

[0044] By filling the inside of the elastic film bag 7 with dense clay materials mixed with a certain amount of flocculants, the clay material filling and water form a waterproof system, and the addition of flocculants can prevent the water absorbing and expanding material 8 from absorbing water and caking, prevent the loss of fine particles in the filling material, become a flexible waterproof layer with high viscosity and high impermeability, and adapt to the settlement changes of the tunnel during operation.

[0045] In another technical solution, the elastic film bag 7 is made of water-soluble material. When the elastic film bag 7 is exposed to water to a certain extent, it dissolves in water and starts to break, which is convenient for the water absorbing and expanding material 8 inside to absorb water, and the water absorbing and expanding material 8 is more likely to break the elastic film bag 7 and enter the segment joint gap 11, and further fill the segment joint gap 11.

[0046] This invention also provides a method for using a pre-embedded shield tunnel leakage sealing system, such as... Figures 1-6 As shown, it includes the following steps:

[0047] S1. When prefabricating the tube segment 1, a reserved groove 3 is provided on the four sides of the tube segment 1.

[0048] S2. Install the elastic membrane bag 7 in the reserved groove 3, and seal the surface of all the elastic membrane bags 7 with a layer of the waterproof protective membrane 9 to prevent water from seeping in during the prefabrication and transportation of the segment 1.

[0049] S3. Rinse the tube segment 1, and tear off the waterproof protective film 9 before assembling the tube segment 1, and then assemble the tube segment 1.

[0050] S4. When water seeps into the joint gap 11 of the pipe segment, the water comes into contact with the elastic membrane bag 7 and seeps into the elastic membrane bag 7. The water-absorbing and expanding material 8 absorbs water and expands, expanding the corresponding elastic membrane bag 7 into the joint gap 11 of the pipe segment to form a dense waterproof layer to block groundwater.

[0051] The elastic membrane bag 7 is fixedly installed in the reserved groove 3 on the side during the prefabrication of the segment 1 to ensure waterproofing. The waterproof protective membrane 9 is removed before assembling the segment 1. Finally, the segment 1 is assembled into a ring-shaped shield segment 1 to protect against water leakage at the joints of the subsequent segment 1. This setting method can expand and fill the gap 11 of the segment joint when the waterproofing effect of the original general rubber waterproof layer 2 is reduced or failed, forming a dense waterproof layer that blocks groundwater, has a good leak-stopping effect, and has long-lasting waterproof performance.

[0052] In another technical solution, such as Figure 4 As shown, a rubber waterproof layer 2 and a reserved groove 3 are arranged radially outward on the pipe segment 1. The elastic membrane bag 7 made of non-water-soluble material is arranged in the reserved groove 3. The outer shell 5 and the movable baffle 6 are arranged on the outside of the elastic membrane bag 7, which together form a compression-type waterproof and leak-stopping system to block groundwater. The movable baffles 6 on both sides of the outer shell 5 expand after the corresponding elastic membrane bag 7 expands due to water permeation, so as to limit the expansion direction of the elastic membrane bag 7.

[0053] Waterproofing is achieved initially through a rubber waterproof layer, which has a skeletal effect to ensure basic seepage prevention between pipe segments 1. By using a non-water-soluble material for the elastic membrane bag 7, the elastic membrane bag 7 itself will not dissolve in water. It mainly relies on the expansion of the elastic membrane bag 7 into the gap 11 of the pipe segment joint. The elastic membrane bags 7 in the corresponding reserved grooves are squeezed tightly against each other to form a dense waterproof layer. The movable baffle 6 limits the expansion of the elastic membrane bag 7 in the early stage, guiding the elastic membrane bag 7 to expand as much as possible toward the gap 11 of the pipe segment joint and squeeze into the gap to achieve a waterproof effect.

[0054] In another technical solution, such as Figure 5 As shown, two rubber waterproof layers (2 and 4) and a reserved groove 3 are provided on the pipe segment 1. The reserved groove 3 is located between the two rubber waterproof layers (2 and 4). A water-soluble elastic membrane bag 7 is placed in the reserved groove 3, which together form a filling type waterproof and leak-stopping system to block groundwater. When the leaking water penetrates into the elastic membrane bag 7, the water-absorbing and expanding material 8 expands and enlarges the elastic membrane bag 7. At the same time, the elastic membrane bag 7 begins to dissolve when it comes into contact with the leaking water until it ruptures. The water-absorbing and expanding material 8 on the inside enters the joint gap 11 of the pipe segment. After encountering water, it expands and solidifies, sealing the seepage channel.

[0055] Two symmetrical rubber waterproof layers (2 and 4) are set to provide stable support for the inner and outer sides of the pipe segment 1. When the elastic membrane bag 7 dissolves in water or is damaged by the expansion of the internal water-absorbing material 8, the internal water-absorbing material 8 leaks out and fills the surrounding gaps, forming an expanded waterproof layer, improving the structure's impermeability, and causing the elastic membrane bag 7 to break actively without affecting the waterproof effect of the leak-stopping component.

[0056] In another technical solution, such as Figure 6 As shown, a rubber waterproof layer 2 and two reserved grooves (3 and 10) are sequentially arranged on the pipe segment 1. The outer reserved groove 10 contains a non-water-soluble elastic membrane bag 7, the outer shell 5, and the movable baffle 6. The inner reserved groove 3 contains a water-soluble elastic membrane bag 7, which together form a composite waterproof and leak-stopping system to block groundwater. After water permeates, the elastic membrane bag 7 in the outer reserved groove 10 expands with the water-absorbing and expanding material 8 on the inner side, blocking the gap. When the elastic membrane bag 7 in the inner reserved groove 3 comes into contact with the leaking water, it gradually dissolves, and the corresponding water-absorbing and expanding material 8 enters the gap between the rubber waterproof layer 2 and the outer reserved groove 10 of the pipe segment 1 to fill it.

[0057] Two reserved slots, wherein the plugging component in the middle reserved slot is set as an elastic film bag 7 which is easy to dissolve and break in water, and the water-absorbing expansion material 8 expands out of the corresponding elastic film bag 7 and can be filled between the rubber waterproof layer on both sides of the pipe joint gap 11 and the non-dissolving elastic film bag 7, while the non-dissolving elastic film bag 7 on the outside relies on mutual extrusion into the gap to block water, thereby forming a composite multi-channel waterproof mechanism along the radial direction of the shield pipe 1 on the pipe joint gap, and jointly plugging and waterproofing, significantly enhancing the waterproofing capacity, and the waterproofing effect is long-lasting.

[0058] In summary, the pre-embedded shield tunnel leakage plugging system and its use method, in the process of pipe piece prefabrication, the shield tunnel leakage plugging device is pre-embedded on the pipe piece, and according to the required plugging condition and the pipe piece structure, it is flexibly combined into multiple plugging modes, when the tunnel appears leakage, the water-absorbing expansion material in the elastic film bag absorbs water and expands, forming a dense waterproof layer with high viscosity and high anti-permeability flexibility, at the same time, the water-absorbing expansion material after the elastic film bag expands and breaks enters the pipe joint gap, which can further absorb water and expand to fill, so as to plug the leakage point of the original waterproof system and improve the waterproof capacity of the original waterproof system.

[0059] Although the embodiments of the present application have been disclosed as above, it is not limited to the application listed in the specification and the embodiments, and it can be fully applied to various fields suitable for the present application, and other modifications can be easily realized by those skilled in the art, therefore, the present application is not limited to specific details and the figures shown and described herein, without departing from the general concept defined by the claims and the equivalent scope.

Claims

1. A pre-embedded shield tunnel leakage plugging system, a rubber waterproof layer is arranged on the side surface of a pipe piece, characterized in that, The utility model relates to a waterproof plugging system for segmental lining of tunnel, which comprises: a reserved groove is arranged on the side surface of the segmental lining and extends along the circumferential direction of the segmental lining, and the reserved groove is located outside the rubber waterproof layer; a plugging assembly comprises elastic film bags, which are connected in the reserved groove and arranged in sequence along the extension direction of the reserved groove, the elastic film bags are water-permeable film bags, the elastic film bags are filled with water-absorbing and swelling materials, the outer side of each elastic film bag is flush with the opening of the reserved groove and is sealed with a waterproof protective film, and the waterproof protective film is detachably connected with each elastic film bag; the outer side of each elastic film bag is further provided with a cuboid-shaped shell, the shell is fixedly connected with the reserved groove, the height of the shell is consistent with the height of the reserved groove, and the side surface of the shell opening to the outside of the reserved groove is provided, each elastic film bag is fully arranged in the shell, and the waterproof protective film is detachably connected with the opening side of the shell; the opening of the shell is hinged with movable flaps on both sides in the length direction of the reserved groove; two reserved grooves are sequentially arranged in the thickness direction of the segmental lining, the reserved groove close to the inner side of the segmental lining is a first reserved groove, the reserved groove away from the center of the segmental lining is a second reserved groove, the first elastic film bags are arranged in the first reserved groove, and the second elastic film bags are arranged in the second reserved groove, the first elastic film bags are made of non-water-soluble material, and the second elastic film bags are made of water-soluble material.

2. The pre-embedded shield tunnel leakage plugging system according to claim 1, wherein, The water-absorbing and swelling material comprises clay material mixed with flocculants.

3. The pre-embedded shield tunnel leakage plugging system according to claim 1, wherein, The elastic film bag is made of water-soluble material.

4. The method of using a pre-installed shield tunnel leakage plugging system according to claim 1, wherein, The utility model relates to a waterproof plugging system for segmental lining of tunnel, which comprises: S1, one reserved groove is arranged on each side surface of the segmental lining during prefabrication of the segmental lining; S2, the elastic film bags are installed in the reserved groove, and a waterproof protective film is sealed and covered on the surface of all the elastic film bags to prevent water from penetrating in during prefabrication and transportation of the segmental lining; S3, the segmental lining is flushed, the waterproof protective film is torn off before the segmental lining is assembled, and then the segmental lining is assembled; S4, when water penetrates into the joint gap of the segmental lining, the water contacts the elastic film bags and penetrates into the elastic film bags, the water-absorbing and swelling material absorbs water and swells, the corresponding elastic film bag swells into the joint gap of the segmental lining to form a dense waterproof layer and block groundwater.

5. The method of using a pre-embedded shield tunnel leakage plugging system as claimed in claim 4, wherein, A reserved groove and a rubber waterproof layer are sequentially arranged on the segmental lining along the radial direction, the elastic film bags made of non-water-soluble material are arranged in the reserved groove, and the shells and the movable flaps are arranged outside the elastic film bags to form an extrusion type waterproof plugging system, which blocks groundwater, and the movable flaps on both sides of the shell are opened to limit the swelling direction of the elastic film bags after the elastic film bags swell.

6. The method of using a pre-embedded shield tunnel leakage plugging system as claimed in claim 4, wherein, Two said rubber waterproof layers and one said reserved groove are arranged on the pipe piece, the reserved groove is located between the two said rubber waterproof layers, the elastic film bag made of water-soluble material is arranged in the reserved groove, and a filling type waterproof and leakage stopping system is formed, underground water is blocked, and seepage water penetrates into the elastic film bag, the water-absorbing and swelling material swells and expands the elastic film bag, at the same time, the elastic film bag starts to dissolve when contacting seepage water until being broken, the water-absorbing and swelling material on the inner side enters the joint gap of the pipe piece, and swells and coagulates after contacting water, thereby sealing the seepage channel.

7. The method of using a pre-embedded shield tunnel leakage plugging system as claimed in claim 4, wherein, One said rubber waterproof layer and two said reserved grooves are arranged on the pipe piece in sequence, the elastic film bag made of non-water-soluble material and the shell and the movable baffle are arranged in the outer said reserved groove, the elastic film bag made of water-soluble material is arranged in the inner said reserved groove, and a composite type waterproof and leakage stopping system is formed, underground water is blocked, the elastic film bag in the outer said reserved groove swells after penetrating water, and the inner said water-absorbing and swelling material expands, thereby blocking the gap, the elastic film bag in the inner said reserved groove gradually dissolves when contacting seepage water, and the corresponding water-absorbing and swelling material enters the gap between the rubber waterproof layer and the outer said reserved groove of the pipe piece to be filled.

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