Deep tunnel fabricated composite lining waterproof structure and construction method thereof

Abstract

The invention discloses a deep tunnel fabricated composite waterproof lining structure and a construction method thereof, and the construction method comprises the following steps: 1, carrying out tunnel excavation, and carrying out prefabrication and on-site assembly of duct pieces to form a primary support; 2, installing a water intercepting and draining device, and arranging a protective layer on the inner side of the water intercepting and draining device; 3, an anti-seepage film, an optical fiber waterproof layer, an inner waterproof layer and a high-performance concrete layer are sequentially arranged, and the anti-seepage film, the optical fiber waterproof layer, the inner waterproof layer and the shield segment layer are connected through the high-performance concrete layer; and fourthly, a secondary lining layer is constructed and molded, and lining is conducted through an integrated concrete pouring method till construction is completed. The technical problems that a traditional deep tunnel waterproof system is often difficult to effectively cope with challenges caused by high osmotic pressure, so that joints are poor in connection and prone to cracking, the waterproof capacity is reduced, tunnel diseases occur frequently, and the overall structure safety and the service life of a tunnel are affected are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of tunnel engineering, and in particular relates to an assembled composite waterproof lining structure for a deep tunnel and a construction method thereof. Background Art

[0002] With the acceleration of urbanization, the demand for submarine tunnels in coastal cities has become more urgent, and the construction of underground tunnels in high osmotic pressure environments has increased. In the construction of deep tunnels, prefabricated structures have been widely used in my country's ground structures and subway projects due to their advantages such as fast construction speed, controllable engineering quality, and simple later maintenance. However, coastal areas and marine island and reef projects face complex underground environments, such as uneven settlement of foundations, temperature changes, strong corrosiveness of seawater, and natural factors such as earthquakes, which will have a significant impact on the performance of prefabricated structures. Especially in deep tunnels, due to the high water pressure and variable groundwater levels under deep burial conditions, traditional waterproofing systems are often difficult to effectively cope with the challenges brought by high osmotic pressure, resulting in poor connection at the joints, easy cracking, and then causing a decrease in waterproofing ability, resulting in frequent tunnel diseases, affecting the overall structural safety and service life of the tunnel. In addition, water infiltration and water accumulation in the tunnel will cause a series of diseases, such as concrete spalling, steel corrosion, and deterioration of the environment in the tunnel, which may even cause the tunnel to fail in severe cases. Summary of the invention

[0003] The purpose of the present invention is to provide a deep tunnel assembled composite waterproof lining structure and a construction method thereof, in order to solve the technical problem that the traditional deep tunnel waterproofing system is often difficult to effectively cope with the challenges brought by high osmotic pressure, resulting in poor connection at the joints, easy cracking, and then causing a decrease in waterproofing ability, leading to frequent tunnel diseases, and affecting the overall structural safety and service life of the tunnel.

[0004] To achieve the above purpose, the present invention adopts the following technical solution.

[0005] A deep tunnel assembled composite waterproof lining structure, comprising a shield segment layer; further comprising a composite anti-seepage layer, a molded secondary lining layer and an intercepting and draining device; the shield segment layer comprises a segment layer and a shield grouting layer; the segment layer is formed by splicing a group of segments, and a notch is arranged on the inner side surface of the segment, close to the side of the splicing seam; the notches of adjacent circumferential segments and the notches of adjacent longitudinal segments are all spliced ​​into an embedded groove; the intercepting and draining device is installed in the embedded groove, and a protective layer is arranged on the inner side of the intercepting and draining device, located in the embedded groove; the shield grouting layer is poured between the outer side of the segment layer and the surrounding rock; the composite anti-seepage layer is arranged on the inner side surface of the shield segment layer to further enhance the waterproof effect; the molded secondary lining layer is arranged on the inner surface of the composite anti-seepage layer to prevent water from entering the tunnel; The intercepting and draining device comprises an optical fiber water-cutting belt, an optical fiber permeable layer and a drain plate; the cross section of the optical fiber water-cutting belt is wavy and embedded in the embedded groove; the long sides of the optical fiber water-cutting belt are connected to the pipe pieces on both sides of the embedded groove through connecting plates; drainage holes are arranged on the connecting plates; the optical fiber permeable layer is arranged between the optical fiber water-cutting belt and the drain plate; a drainage ditch is arranged on the drain plate, close to the groove, along the long axis of the drain plate; the lower end of the circumferential drainage ditch extends into the inverted arch at the bottom of the tunnel and communicates with the drainage channel arranged in the inverted arch; The composite anti-seepage layer is arranged on the inner side of the shield segment layer, and includes an anti-seepage membrane, an optical fiber waterproof layer, an inner waterproof layer and a high-performance concrete layer arranged in sequence from the outside to the inside; The molded secondary lining is arranged on the inner side of the composite anti-seepage layer, and an optical fiber demodulator is arranged in the molded secondary lining; the optical fiber demodulator is connected to the optical fiber permeation layer and / or the optical fiber waterproof layer, and is used to receive the monitoring signal generated when water seepage occurs, so as to perform real-time monitoring of water leakage.

[0006] Preferably, the cast secondary lining is lined using an integrated pouring concrete method.

[0007] Preferably, the optical fiber water-cutting belt comprises a corrugated plate made of rubber material; first optical fiber cables are pre-buried at intervals in the corrugated plate; there is a group of the first optical fiber cables, which are arranged in parallel and at intervals along the width direction of the embedding groove; first optical fiber gratings are installed at intervals on the optical fibers of the first optical fiber cables; a first heating sleeve is sleeved on the first optical fiber grating, and the first heating sleeve is connected to an external power supply through a first cable; connecting plates are arranged on the long sides of both sides of the optical fiber water-cutting belt; the cross-section of the connecting plate is an inverted L-shape, and the horizontal plate section and the vertical plate section of the connecting plate are respectively connected to the two side surfaces of the notch by bolts; a force transmission pad is arranged on the side of the horizontal plate section of the connecting plate close to the side surface of the notch; the drainage hole is arranged on the vertical plate section of the connecting plate.

[0008] Preferably, the gaps between the optical fiber water-cutting tape and the optical fiber permeation layer are filled with porous water-permeable materials.

[0009] Preferably, the optical fiber permeation layer includes a second outer cladding and a second optical fiber cable; the second outer cladding is paved with a semi-permeable material; there is a group of second optical fiber cables, which are arranged in the second outer cladding at intervals along the width direction of the embedding groove; second optical fiber Bragg gratings are installed at intervals on the optical fibers of the second optical fiber cable; a second heating sleeve is provided on the second optical fiber Bragg grating, and the second heating sleeve is connected to an external power supply through a second cable.

[0010] Preferably, the optical fiber waterproof layer includes a third outer cladding and a third optical fiber cable; the third outer cladding is made of waterproof material; there is a group of third optical fiber cables, which are arranged in the third outer cladding at intervals along the width direction of the embedding groove; third optical fiber gratings are installed at intervals on the optical fibers of the third optical fiber cable; a third heating sleeve is provided on the third optical fiber grating, and the third heating sleeve is connected to an external power supply through a third cable.

[0011] A construction method for a deep tunnel assembled composite waterproof lining structure comprises the following steps: Step 1: excavate the tunnel, prefabricate and assemble the segments on site to form initial support; Step 2: Install the intercepting and draining device. After the pipe segments are assembled, install the intercepting and draining device at the joints, and set a protective layer on the inner side of the intercepting and draining device. Step 3: sequentially arrange an anti-seepage membrane, an optical fiber waterproof layer, an inner waterproof layer and a high-performance concrete layer, and connect the anti-seepage membrane, the optical fiber waterproof layer, the inner waterproof layer and the shield segment layer through the high-performance concrete layer; Step 4: construct the secondary lining using a one-piece concrete pouring method, and the construction is now complete.

[0012] Preferably, when installing the water intercepting and draining device in step 2, a connecting plate is used to connect the optical fiber water intercepting tape to the side wall of the embedding groove, and a porous water-permeable material is used to fill the gap between the optical fiber permeable layer and the optical fiber water intercepting tape.

[0013] Preferably, the interface of the connection plate is cleaned and processed before installing the intercepting and draining device to ensure that the intercepting and draining device is tightly connected to the pipe segment, and the connection is sealed to ensure the effectiveness of its waterproof function.

[0014] Compared with the prior art, the present invention has the following characteristics and beneficial effects.

[0015] 1. The present invention proposes a deep tunnel assembled composite lining waterproof device and a construction method thereof, aiming to provide an effective waterproof solution for the special needs of deep tunnels. The waterproof device significantly enhances the resistance to high osmotic pressure by optimizing the selection of materials and structural design, ensuring the sealing of the joints and the overall waterproof performance. In addition, the improvement of the construction method also makes the device more convenient in practical application and reduces the risk and difficulty in the construction process.

[0016] 2. The present invention can effectively solve the lack of high osmotic pressure resistance in traditional waterproof systems by implementing the present invention. At the same time, by monitoring the water penetration inside the support structure, the relevant personnel are warned to strengthen waterproof measures, reduce the occurrence of tunnel diseases, increase the service life of the tunnel, and ensure the safe and reliable operation of deep tunnels in complex underground environments. This not only helps to improve the operating efficiency of tunnels, but also provides solid technical support and guarantee for the infrastructure construction of coastal areas and marine islands and reefs.

[0017] The present invention discloses a prefabricated composite lining waterproof structure for a deep tunnel, comprising a shield segment layer, a drainage device, a composite anti-seepage layer, a molded secondary lining layer and a leakage monitoring system. The structure is formed by using TBM excavation technology and prefabricated segments to quickly form a force-bearing structure, which is connected to the surrounding rock, facilitating subsequent tunnel construction and improving construction efficiency and accuracy. Fiber optic water-cutting tapes, fiber optic permeable layers and drainage boards are embedded in the segment joints to cut off the seepage path, monitor the water seepage, and ensure that the water that may infiltrate can be guided and discharged in time to prevent water accumulation from causing structural damage. The composite anti-seepage layer further improves the waterproof performance of the lining structure to ensure that the inner lining is not affected by the infiltrating water. After the infiltrating water enters the fiber optic water-cutting tape, the fiber optic permeable layer or the fiber optic waterproof layer, the fiber optic Bragg grating generates a monitoring signal, and the fiber optic demodulator processes the signal, facilitating the relevant personnel to monitor the lining. The inner lining is cast using an integrated pouring concrete method, providing a more uniform and seamless internal lining, further improving the waterproofness and structural strength; the present invention utilizes a multi-layer waterproof structure, has good earthquake resistance and the ability to adapt to various soils and geological environments, can effectively improve the tunnel's anti-seepage performance, reduce maintenance costs, and ensure long-term stable operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0019] Figure 1 It is a schematic diagram of the structural layers of the deep tunnel assembled composite waterproof lining structure of the present invention.

[0020] Figure 2 It is a cross-sectional view of the deep tunnel assembled composite waterproof lining structure of the present invention.

[0021] Figure 3 It is a three-dimensional schematic diagram of the intercepting and draining device in the present invention.

[0022] Figure 4 It is a cross-sectional view of the intercepting and draining device in the present invention.

[0023] Figure 5 It is a three-dimensional schematic diagram of the optical fiber water-cutting tape in the present invention.

[0024] Figure 6 It is a schematic diagram of the structure of the composite anti-seepage layer in the present invention.

[0025] Figure 7 It is a schematic diagram of the structure in which a third fiber Bragg grating is arranged on the third optical fiber cable in the present invention.

[0026] Figure 8 It is a schematic diagram of the splicing structure of the pipe segments in the present invention.

[0027] Fig. 9 It is a schematic diagram of the structure in which a first fiber Bragg grating is arranged on a first optical fiber cable in the present invention.

[0028] Fig.10 It is a schematic cross-sectional structure diagram of the third optical fiber cables arranged at intervals in the third outer cladding in the present invention.

[0029] Fig.11 It is a schematic cross-sectional structure diagram of the second optical fiber cables arranged at intervals in the second outer cladding in the present invention.

[0030] Fig.12 It is a schematic diagram of the structure in which a second fiber grating is arranged on the second optical fiber cable in the present invention.

[0031] Fig.13 It is a structural schematic diagram of the connection between the optical fiber demodulator and the second optical fiber cable in the present invention.

[0032] Fig.14 It is a schematic diagram of the connection structure between the drainage ditch and the drainage channel in the present invention.

[0033] Figure symbols: 1-shield segment layer, 1.1-shield grouting layer, 1.2-segment layer, 1.2.1-segment, 2-composite anti-seepage layer, 2.1-anti-seepage membrane, 2.2-optical fiber waterproof layer, 2.2.1-third outer cladding layer, 2.2.2-third optical fiber cable, 2.2.3-third optical fiber Bragg grating, 2.2.4-third heating sleeve, 2.2.5-third cable, 2.3-inner waterproof layer, 2.4-high performance concrete layer, 3-molded secondary lining, 4-intercepting and drainage device, 4.1-optical fiber water-cutting belt, 4.1.1-corrugated plate, 4.1.2-first Optical fiber cable, 4.1.3 - first optical fiber Bragg grating, 4.1.4 - first heating sleeve, 4.1.5 - first cable, 4.2 - optical fiber penetration layer, 4.2.1 - second outer cladding, 4.2.2 - second optical fiber cable, 4.2.3 - second optical fiber Bragg grating, 4.2.4 - second heating sleeve, 4.2.5 - second cable, 4.3 - drainage board, 4.4 - force transmission pad, 4.5 - connecting plate, 5 - notch, 6 - embedding groove, 7 - protective layer, 8 - drainage ditch, 9 - optical fiber demodulator, 10 - drainage hole, 11 - bolt, 12 - inverted arch, 13 - drainage channel. DETAILED DESCRIPTION

[0034] like Figure 1-14As shown, in this embodiment, the side close to the internal space of the tunnel is the inner side, and the side close to the soil outside the tunnel is the outer side. An inverted arch is arranged at the bottom of the tunnel, and drainage channels 13 are arranged at intervals in the inverted arch.

[0035] This deep tunnel assembled composite waterproof lining structure is suitable for complex conditions such as high osmotic pressure environment, uneven foundation settlement, temperature change, seawater corrosion and earthquake, etc., and includes a shield segment layer 1; it also includes a composite anti-seepage layer 2, a molded secondary lining 3 and a drainage device 4; the shield segment layer 1 uses TBM excavation technology and assembled segments to quickly form a force-bearing structure, which is connected to the surrounding rock, facilitating subsequent tunnel construction and improving construction efficiency and accuracy; the shield segment layer 1 includes a segment layer 1.2 and a shield grouting layer 1.1; the segment layer 1.2 is spliced ​​by a group of segments 1.2.1, and in the segment 1 .2.1, a notch 5 is arranged on the inner side surface, near the joint; the notches 5 of adjacent circumferential segments 1.2.1 and the notches 5 of adjacent longitudinal segments 1.2.1 are all assembled into an embedded groove 6; the intercepting and draining device 4 is installed in the embedded groove 6, and a protective layer 7 is arranged on the inner side of the intercepting and draining device 4 and in the embedded groove 6; the shield grouting layer 1.1 is poured between the outer side of the segment layer 1.2 and the surrounding rock; the composite anti-seepage layer 2 is arranged on the inner side surface of the shield segment layer 1 to further enhance the waterproof effect; the molded secondary lining layer 3 is arranged on the inner surface of the composite anti-seepage layer 2 to prevent water from entering the tunnel; The water intercepting and drainage device 4 comprises an optical fiber water intercepting tape 4.1, an optical fiber permeable layer 4.2 and a drainage board 4.3; the cross section of the optical fiber water intercepting tape 4.1 is wavy and embedded in the embedding groove 6; the optical fiber water intercepting tape 4.1 is used to guide the seepage and drain in a specified direction, and is made of a flexible material to enhance its adaptability; the long sides of the optical fiber water intercepting tape 4.1 are connected to the pipe sheets 1.2.1 on both sides of the embedding groove 6 through a connecting plate 4.5; the connecting plate 4.5 is arranged along the long axis of the optical fiber water intercepting tape 4.1; a drainage hole 10 is arranged on the connecting plate 4.5; the optical fiber permeable layer 4.2 is arranged between the optical fiber water intercepting tape 4.1 and the drainage board 4.3; on the drainage board 4. 3, a drainage ditch 8 is arranged along the long axis of the drainage plate 4.3 on one side close to the inner side of the groove; since the embedded groove 6 formed by the notches 5 of the adjacent annular segments 1.2.1 is longitudinal, and the embedded groove 6 formed by the notches 5 of the adjacent longitudinal segments 1.2.1 is annular; therefore, the intercepting and draining device 4 is arranged in the longitudinal and annular directions, and the drainage ditch 8 in the intercepting and draining device 4 is also longitudinal and annular; the longitudinal drainage ditch 8 is connected with the annular drainage ditch 8, and the water in the longitudinal drainage ditch 8 can flow into the annular drainage ditch 8; the lower end of the annular drainage ditch 8 extends into the inverted arch 12 at the bottom of the tunnel, and is connected with the drainage channel 13 arranged in the inverted arch 12; the water is discharged from the drainage channel 13.

[0036] The composite anti-seepage layer 2 is arranged on the inner side of the shield segment layer 1, and includes an anti-seepage membrane 2.1, an optical fiber waterproof layer 2.2, an inner waterproof layer 2.3 and a high-performance concrete layer 2.4 arranged in sequence from the outside to the inside; wherein the anti-seepage membrane 2.1 is laid on the inner side of the shield segment layer 1, and has excellent flexibility and anti-seepage properties, and waterproofs the inner side of the anti-seepage membrane 2.1 to prevent water from passing through; the optical fiber waterproof layer 2.2 is laid on the inner side of the anti-seepage membrane 2.1, and has a certain water isolation function; the inner waterproof layer 2.3 is laid It is attached to the inner side of the optical fiber waterproof layer 2.2 and to the outer side of the molded secondary lining layer 3; the inner waterproof layer 2.3 adopts high-performance waterproof material to ensure the waterproof ability of the inner lining and prevent water from penetrating into the inner lining; the molded secondary lining layer 3 is arranged on the inner side of the composite anti-seepage layer 2, and an optical fiber demodulator 9 is arranged in the molded secondary lining layer 3; the optical fiber demodulator 9 is connected to the optical fiber penetration layer 4.2 and / or the optical fiber waterproof layer 2.2, and is used to receive the monitoring signal generated when water seepage occurs, so as to monitor the water leakage in real time.

[0037] In this embodiment, the cast secondary lining 3 is used as the inner lining and is lined using an integrated concrete pouring method. After the composite anti-seepage layer is laid, reinforced concrete is cast in situ to form the inner lining according to relevant requirements and actual needs. This method provides a more uniform and seamless internal lining, further improving the waterproofness and structural strength.

[0038] In this embodiment, the optical fiber water-cutting belt 4.1 comprises a corrugated plate 4.1.1 made of rubber material; first optical fiber cables 4.1.2 are pre-buried at intervals in the corrugated plate 4.1.1; there is a group of the first optical fiber cables 4.1.2, which are arranged in parallel and at intervals along the width direction of the embedding groove; first optical fiber gratings 4.1.3 are installed at intervals on the optical fibers of the first optical fiber cables 4.1.2; a first heating sleeve 4.1.4 is sleeved on the first optical fiber grating 4.1.3, and the first heating sleeve 4.1.4 is connected to an external power supply via a first cable 4.1.5. Connecting plates 4.5 are arranged on the long sides of both sides of the optical fiber water-cutting tape 4.1; the cross-section of the connecting plate 4.5 is in an inverted L-shape, and the horizontal plate section and the vertical plate section of the connecting plate 4.5 are respectively connected to the two side surfaces of the notch 5 by bolts 11; a force transmission pad 4.4 is arranged on the side of the horizontal plate section of the connecting plate 4.5 close to the side surface of the notch; the drainage hole 10 is arranged on the vertical plate section of the connecting plate 4.5; the force transmission pad 4.4 is made of nitrile cork rubber material, and the connecting plate 4.5 is made of steel plate.

[0039] In this embodiment, the gap between the optical fiber water-cutting tape 4.1 and the optical fiber permeable layer 4.2 is filled with porous water-permeable material; the optical fiber water-cutting tape 4.1 and the drainage board 4.3 enhance the waterproof effect of the joints of the pipe segments, and jointly monitor the water seepage of the drainage device 4 with the optical fiber permeable layer 4.2.

[0040] In this embodiment, the joints between the optical fiber permeable layer 4.2 and the optical fiber water-cutting tape 4.1 are coated with high-performance sealant such as polyurethane for compression; the drainage board 4.3 is connected to the pipe segments 1.2.1 on both sides by clamping with prefabricated clamping grooves.

[0041] In this embodiment, the optical fiber permeation layer 4.2 includes a second outer cladding 4.2.1 and a second optical fiber cable 4.2.2; the second outer cladding 4.2.1 is paved with semi-permeable material; there is a group of second optical fiber cables 4.2.2, which are arranged in the second outer cladding 4.2.1 at intervals along the width direction of the embedding groove; second optical fiber gratings 4.2.3 are installed at intervals on the optical fibers of the second optical fiber cables 4.2.2; a second heating sleeve 4.2.4 is provided on the second optical fiber grating 4.2.3, and the second heating sleeve 4.2.4 is connected to an external power supply through a second cable 4.2.5.

[0042] In this embodiment, after the water enters the intercepting and draining device 4, the optical fiber intercepting tape 4.1 can be used to drain part of the water. After the water penetrates into the optical fiber intercepting tape 4.1, the water can be drained out of the lining using the drainage board to avoid entering the inner lining.

[0043] In this embodiment, the optical fiber waterproof layer 2.2 includes a third outer cladding 2.2.1 and a third optical fiber cable 2.2.2; the third outer cladding 2.2.1 is made of waterproof material; the third optical fiber cable 2.2.2 has a group, which is arranged in parallel and spaced in the third outer cladding 2.2.1 along the width direction of the embedding groove; third optical fiber gratings 2.2.3 are installed on the optical fiber of the third optical fiber cable 2.2.2; the third optical fiber grating 2.2.3 is covered with a third heating sleeve 2.2.4, and the third heating sleeve 2.2.4 is connected to an external power source through a third cable 2.2.5. In this embodiment, a plurality of optical fiber grating monitoring points are arranged on the optical fiber water-cutting tape 4.1, the optical fiber permeation layer 4.2 and the optical fiber cable inside the optical fiber waterproof layer 2.2, and the optical fiber grating is covered with a heating sleeve, which is connected to an external power source through a cable, and the optical fiber cable is connected to a laser light source. The optical fiber water-cutting tape 4.1, the optical fiber penetration layer 4.2 and the optical fiber waterproof layer 2.2 are connected to the optical fiber demodulator 9 to form a leakage monitoring system; when water penetrates through the optical fiber water-cutting tape 4.1 and / or the optical fiber penetration layer 4.2 and / or the optical fiber waterproof layer 2.2, the optical fiber Bragg grating generates a monitoring signal representing the heat change and transmits it to the optical fiber demodulator. The data output of the optical fiber demodulator is transmitted to a computer or a dedicated analysis system for further data processing, storage and visualization. These systems can perform detailed analysis of the demodulated signal, generate charts, reports, etc., to help engineers troubleshoot or evaluate performance.

[0044] In this embodiment, the first heating sleeve 4.1.4, the second heating sleeve 4.2.4 and the third heating sleeve 2.2.4 are collectively referred to as heating sleeves; wire connection points are reserved at both ends of the heating sleeves, and the two ends of each heating sleeve are respectively connected to the live wire and the neutral wire (i.e., the first cable 4.1.5 or the second cable 4.2.5 or the third cable 2.2.5), and the connection is insulated and protected to prevent short circuit due to moisture. The power cord uses a waterproof cable to ensure safety and reliability; the voltage-stabilized power supply is turned on to increase the temperature of the heating sleeve and transfer the heat to the fiber grating sensor. The leaking water takes away the heat, and the fiber grating sensor captures the temperature change. The heating sleeves are connected in parallel to ensure that the working voltage of all heating sleeves is the same. Each heating sleeve can work independently, and the failure of a single heating sleeve does not affect other heating sleeves, which is convenient for troubleshooting and maintenance.

[0045] The construction method of the deep tunnel assembled composite waterproof lining structure comprises the following steps.

[0046] Step 1: excavate the tunnel, prefabricate and assemble the segments 1.2.1 on site to form initial support.

[0047] Step two, install the intercepting and draining device 4. After the pipe segments are assembled, the intercepting and draining device 4 is installed at the joints, and a protective layer 7 is set on the inner side of the intercepting and draining device 4. The protective layer 7 uses high-performance concrete to improve the waterproof performance of the location and achieve multiple waterproof effects.

[0048] Step three, arrange the anti-seepage membrane 2.1, the optical fiber waterproof layer 2.2, the inner waterproof layer 2.3 and the high-performance concrete layer 2.4 in sequence, and connect the anti-seepage membrane 2.1, the optical fiber waterproof layer 2.2, the inner waterproof layer 2.3 with the shield segment layer 1 through the high-performance concrete layer 2.4, which can effectively inhibit the penetration of water and maintain good anti-seepage performance under different environments.

[0049] Step 4: construct the secondary lining 3 in a mold, and use the integrated pouring concrete method for lining, and the construction is now completed.

[0050] In this embodiment, when installing the intercepting and draining device 4 in step 2, the optical fiber water-cutting tape 4.1 is connected to the side wall of the embedding groove by using the connecting plate 4.5, and the gap between the optical fiber permeable layer 4.2 and the optical fiber water-cutting tape 4.1 is filled with porous water-permeable material.

[0051] In this embodiment, the interface of the connecting plate 4.5 is cleaned and processed before installing the intercepting and draining device 4 to ensure that the intercepting and draining device 4 is tightly connected to the pipe segment, and the connection is sealed to ensure the effectiveness of its waterproof function.

[0052] The above embodiments are not exhaustive of specific implementation methods, and there may be other embodiments. The above embodiments are intended to illustrate the present invention rather than to limit the protection scope of the present invention. All applications derived from simple variations of the present invention fall within the protection scope of the present invention.

Claims

1. A deep tunnel assembled composite waterproof lining structure, comprising a shield segment layer (1); characterized in that: It also includes a composite anti-seepage layer (2), a molded secondary lining layer (3) and a water interception and drainage device (4); the shield segment layer (1) includes a segment layer (1.2) and a shield grouting layer (1.1); the segment layer (1.2) is formed by splicing a group of segments (1.2.1), and a notch (5) is provided on the inner side surface of the segment (1.2.1) near the splicing seam; the notches (5) of adjacent circumferential segments (1.2.1) and the notches (5) of adjacent longitudinal segments (1.2.1) are all spliced ​​together. The invention relates to a synthetic embedded groove (6); the intercepting and draining device (4) is installed in the embedded groove (6), and a protective layer (7) is arranged on the inner side of the intercepting and draining device (4) and in the embedded groove (6); the shield grouting layer (1.1) is poured between the outer side of the segment layer (1.2) and the surrounding rock; the composite anti-seepage layer (2) is arranged on the inner side of the shield segment layer (1) to further enhance the waterproof effect; the molded secondary lining layer (3) is arranged on the inner surface of the composite anti-seepage layer (2) to prevent water from entering the tunnel; The intercepting and draining device (4) comprises an optical fiber intercepting tape (4.1), an optical fiber permeable layer (4.2) and a drain plate (4.3); the optical fiber intercepting tape (4.1) has a wavy cross section and is embedded in the embedding groove (6); the long sides of the optical fiber intercepting tape (4.1) are connected to the pipe segments (1.2.1) on both sides of the embedding groove (6) through a connecting plate (4.5); a drain hole (10) is provided on the connecting plate (4.5); the optical fiber permeable layer (4.2) is provided between the optical fiber intercepting tape (4.1) and the drain plate (4.3); a drain ditch (8) is provided on the drain plate (4.3) along the long axis of the drain plate (4.3) on one side close to the groove; the lower end of the annular drain ditch (8) extends into the inverted arch (12) at the bottom of the tunnel and is connected to a drain channel (13) provided in the inverted arch (12); The composite anti-seepage layer (2) is arranged on the inner side of the shield segment layer (1), and comprises an anti-seepage membrane (2.1), an optical fiber waterproof layer (2.2), an inner waterproof layer (2.3) and a high-performance concrete layer (2.4) arranged in sequence from the outside to the inside; The molded secondary lining (3) is arranged on the inner side of the composite anti-seepage layer (2), and an optical fiber demodulator (9) is arranged in the molded secondary lining (3); the optical fiber demodulator (9) is connected to the optical fiber permeable layer (4.2) and / or the optical fiber waterproof layer (2.2) and is used to receive monitoring signals generated when water seepage occurs, so as to perform real-time monitoring of water leakage.

2. The deep tunnel assembled composite waterproof lining structure according to claim 1 is characterized by: The molded secondary lining (3) is lined using an integrated concrete pouring method.

3. The deep tunnel assembled composite waterproof lining structure according to claim 1 is characterized by: The optical fiber water-cutting belt (4.1) comprises a corrugated plate (4.1.1) made of rubber material; first optical fiber cables (4.1.2) are pre-buried at intervals in the corrugated plate (4.1.1); the first optical fiber cables ( 4.1.2) has a group of parallel and spaced arrangement along the width direction of the embedding groove; in the first optical fiber cable ( The optical fiber of the optical fiber cut-off tape (4.1) is provided with a first optical fiber grating (4.1.3) at intervals; the first optical fiber grating (4.1.3) is provided with a first heating sleeve (4.1.4), and the first heating sleeve (4.1.4) is connected to an external power source through a first cable (4.1.5); connecting plates (4.5) are provided on the long sides of both sides of the optical fiber cut-off tape (4.1); the cross section of the connecting plate (4.5) is in an inverted L shape, and the horizontal plate section and the vertical plate section of the connecting plate (4.5) are respectively connected to the two side surfaces of the notch (5) through bolts (11); a force transmission pad (4.4) is provided on the side of the horizontal plate section of the connecting plate (4.5) close to the side surface of the notch; and the drainage hole (10) is provided on the vertical plate section of the connecting plate (4.5).

4. The deep tunnel assembled composite waterproof lining structure according to claim 1 is characterized by: The gap between the optical fiber water-cutting tape (4.1) and the optical fiber permeable layer (4.2) is filled with porous water-permeable material.

5. The deep tunnel assembled composite waterproof lining structure according to claim 1 is characterized by: The optical fiber permeation layer (4.2) comprises a second outer cladding (4.2.1) and a second optical fiber cable (4.2.2); the second outer cladding (4.2.1) is paved with a semi-permeable material; a group of the second optical fiber cables (4.2.2) are arranged in the second outer cladding (4.2.1) at intervals along the width direction of the embedding groove; second optical fiber gratings (4.2.3) are installed at intervals on the optical fibers of the second optical fiber cables (4.2.2); a second heating sleeve (4.2.4) is provided on the second optical fiber grating (4.2.3), and the second heating sleeve (4.2.4) is connected to an external power source via a second cable (4.2.5).

6. The deep tunnel assembled composite waterproof lining structure according to claim 1 is characterized by: The optical fiber waterproof layer (2.2) comprises a third outer cladding (2.2.1) and a third optical fiber cable (2.2.2); the third outer cladding (2.2.1) is made of waterproof material; a group of the third optical fiber cables (2.2.2) are arranged in the third outer cladding (2.2.1) at intervals along the width direction of the embedding groove; third optical fiber gratings (2.2.3) are installed at intervals on the optical fibers of the third optical fiber cables (2.2.2); a third heating sleeve (2.2.4) is provided on the third optical fiber grating (2.2.3), and the third heating sleeve (2.2.4) is connected to an external power source via a third cable (2.2.5).

7. A construction method for a deep tunnel assembled composite waterproof lining structure according to any one of claims 1 to 6, characterized in that: The steps include: Step 1: excavate the tunnel, prefabricate and assemble the segments (1.2.1) on site to form the initial support; Step 2: installing the intercepting and draining device (4). After the pipe segments are assembled, the intercepting and draining device (4) is installed at the joints, and a protective layer (7) is provided on the inner side of the intercepting and draining device (4); Step 3: sequentially arrange an anti-seepage membrane (2.1), an optical fiber waterproof layer (2.2), an inner waterproof layer (2.3), and a high-performance concrete layer (2.4), and connect the anti-seepage membrane (2.1), the optical fiber waterproof layer (2.2), the inner waterproof layer (2.3), and the shield segment layer (1) via the high-performance concrete layer (2.4); Step 4: construct the secondary lining (3) using a one-piece concrete pouring method, and the construction is now complete.

8. The construction method of the deep tunnel assembled composite waterproof lining structure according to claim 7 is characterized by: When installing the water intercepting and draining device (4) in step 2, the optical fiber water intercepting tape (4.1) is connected to the side wall of the embedding groove using a connecting plate (4.5), and the gap between the optical fiber permeable layer (4.2) and the optical fiber water intercepting tape (4.1) is filled with a porous water-permeable material.

9. The construction method of the deep tunnel assembled composite waterproof lining structure according to claim 7 is characterized by: Before installing the intercepting and draining device (4), the interface of the connecting plate (4.5) is cleaned and processed to ensure that the intercepting and draining device (4) is tightly connected to the pipe segment, and the connection is sealed to ensure the effectiveness of its waterproof function.

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