Deep tunnel assembled composite lining waterproof structure and construction method thereof

Abstract

A kind of deep tunnel assembly type composite waterproof lining structure and its construction method, including steps as follows: step one, tunnel excavation is carried out, prefabrication and on-site assembly of segment are carried out, and initial support is formed;Step two, install drainage device, and set protective layer on the inner side of drainage device;Step three, in turn set up impermeable membrane, optical fiber waterproof layer, inner waterproof layer and high-performance concrete layer, connect impermeable membrane, optical fiber waterproof layer, inner waterproof layer and shield segment layer through high-performance concrete layer;Step four, construction of moulding secondary lining, lining is carried out using integrated pouring concrete method, and the construction is completed by now.The present application solves the technical problem that traditional deep tunnel waterproof system is often difficult to effectively cope with the challenge brought by high permeation pressure, leading to poor connection at joint, easy to crack, and further causing the decline of waterproof capacity, leading to frequent tunnel diseases, affecting the overall structural safety and service life of tunnel.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of tunnel engineering, and particularly relates to a deep tunnel assembled composite waterproof lining structure and a construction method thereof. BACKGROUND

[0002] With the acceleration of urbanization, the demand for submarine tunnels in coastal cities is increasingly urgent, and the construction of underground tunnels in high permeability pressure environments is increasing. In deep tunnel construction, assembled structures have been widely used in above-ground structures and subway projects in China due to their fast construction speed, controllable engineering quality, and simple post-maintenance advantages. However, coastal areas and marine island projects face complex underground environments, such as uneven settlement of the foundation, temperature changes, strong corrosiveness of seawater, and earthquakes, which can significantly affect the performance of assembled structures. In particular, in deep tunnels, due to high water pressure and variable groundwater levels under deep burial conditions, traditional waterproof systems often struggle to effectively cope with the challenges brought by high permeability pressure, leading to poor connection at the joints, easy cracking, and thus a decline in waterproofing ability, resulting in frequent tunnel diseases and affecting the overall structural safety and service life of the tunnel. In addition, water penetration and water accumulation in the tunnel can cause a series of diseases such as concrete spalling, steel corrosion, and deterioration of the tunnel environment, and in severe cases, can even lead to functional failure of the tunnel. SUMMARY

[0003] The purpose of the present application is to provide a deep tunnel assembled composite waterproof lining structure and a construction method thereof, which solves the technical problem that traditional deep tunnel waterproof systems often struggle to effectively cope with the challenges brought by high permeability pressure, leading to poor connection at the joints, easy cracking, and thus a decline in waterproofing ability, resulting in frequent tunnel diseases and affecting the overall structural safety and service life of the tunnel.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical solutions.

[0005] A deep tunnel assembled composite waterproof lining structure, comprising a shield segment layer; further comprising a composite impermeable layer, a molded secondary lining layer, and a water interception and drainage 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 provided on the inner side of the segment near the splicing joint; the notches of adjacent circumferential segments and the notches of adjacent longitudinal segments are combined into a slot; the water interception and drainage device is installed in the slot, and a protective layer is provided on the inner side of the water interception and drainage device in the slot; the shield grouting layer is poured between the outer side of the segment layer and the surrounding rock; the composite impermeable layer is provided on the inner side of the shield segment layer to further enhance the waterproof effect; the molded secondary lining layer is provided on the inner surface of the composite impermeable layer to prevent water from entering the tunnel;

[0006] The drainage device comprises a fiber water cutting belt, a fiber permeation layer and a drainage plate; the cross section of the fiber water cutting belt is in a wave shape and is embedded in an embedding groove; the long sides of the fiber water cutting belt on both sides are connected with the segments on both sides of the embedding groove through connecting plates; drainage holes are arranged on the connecting plates; the fiber permeation layer is arranged between the fiber water cutting belt and the drainage plate; a drainage ditch is arranged on the drainage plate, near the side in the groove and along the long axis of the drainage plate; the circumferential lower end of the drainage ditch extends to the inverted arch at the bottom of the tunnel and communicates with a drainage channel arranged in the inverted arch;

[0007] The composite anti-permeation layer is arranged on the inner side of the shield segment layer and comprises, from outside to inside, an anti-permeation film, a fiber waterproof layer, an inner waterproof layer and a high-performance concrete layer.

[0008] The mold lining secondary lining layer is arranged on the inner side of the composite anti-permeation layer, and a fiber demodulator is arranged in the mold lining secondary lining layer; the fiber demodulator is connected with the fiber permeation layer and / or the fiber waterproof layer and is used to receive monitoring signals generated when water seeps in for real-time monitoring of seepage water.

[0009] Preferably, the mold lining secondary lining layer is lined using an integrated pouring concrete method.

[0010] Preferably, the fiber water cutting belt comprises a wave-shaped plate made of rubber material; a first fiber cable is embedded in the wave-shaped plate; the first fiber cable is arranged in parallel and at intervals along the width direction of the embedding groove; first fiber gratings are arranged at intervals on the fiber of the first fiber cable; a first heating sleeve is sleeved on the first fiber gratings, and the first heating sleeve is connected with an external power source through a first cable; connecting plates are arranged on the long sides of the fiber water cutting belt; the cross section of the connecting plate is in an inverted L shape, and the horizontal plate segment and the vertical plate segment of the connecting plate are connected with the two side surfaces of the notch through bolts respectively; a force transmission gasket is arranged on the side of the horizontal plate segment of the connecting plate close to the notch; the drainage holes are arranged on the vertical plate segment of the connecting plate.

[0011] Preferably, the gap between the fiber water cutting belt and the fiber permeation layer is filled with porous water seepage material.

[0012] Preferably, the fiber permeation layer comprises a second outer cladding layer and a second fiber cable; the second outer cladding layer is made of semi-water permeable material; the second fiber cable is arranged in the second outer cladding layer at intervals along the width direction of the embedding groove; second fiber gratings are arranged at intervals on the fiber of the second fiber cable; a second heating sleeve is sleeved on the second fiber gratings, and the second heating sleeve is connected with an external power source through a second cable.

[0013] Preferably, the optical fiber waterproof layer comprises a third outer cladding and a third optical fiber cable; the third outer cladding is made of waterproof material; the third optical fiber cable is a group of cables arranged in the third outer cladding in the width direction of the embedding groove; a third fiber grating is arranged on the optical fiber of the third optical fiber cable; a third heating sleeve is sleeved on the third fiber grating, and the third heating sleeve is connected with an external power supply through a third cable.

[0014] A construction method of a deep tunnel assembled composite waterproof lining structure, comprising the following steps:

[0015] Step one, tunnel excavation, prefabrication and on-site assembly of segments to form initial support;

[0016] Step two, install the drainage device, install the drainage device at the joint after segment assembly, and set a protective layer on the inner side of the drainage device;

[0017] Step three, sequentially set the impermeable membrane, optical fiber waterproof layer, inner waterproof layer, and high-performance concrete layer, and connect the impermeable membrane, optical fiber waterproof layer, inner waterproof layer, and shield segment layer through the high-performance concrete layer;

[0018] Step four, construction of the secondary lining, using an integrated pouring concrete method for lining, and the construction is completed.

[0019] Preferably, when installing the drainage device in step two, a connecting plate is used to connect the optical fiber water cutting belt with the embedding groove side wall, and a porous water permeable material is used to fill the gap between the optical fiber permeable layer and the optical fiber water cutting belt.

[0020] Preferably, the connecting plate interface is cleaned and treated before installing the drainage device to ensure that the drainage device is tightly connected with the segment, and the connecting part is sealed to ensure the effectiveness of the waterproof function.

[0021] Compared with the prior art, the present application has the following characteristics and beneficial effects.

[0022] 1. The present application proposes a deep tunnel assembled composite lining waterproof device and its construction method, aiming at the special needs of deep tunnel, providing an effective waterproof solution. The waterproof device optimizes the selection of materials and structural design, significantly enhances the resistance to high permeability pressure, ensures the sealing performance of the joint and the overall waterproof performance. In addition, the improvement of the construction method also makes the device more convenient in practical application, reduces the risk and difficulty in the construction process.

[0023] 2、The application can effectively solve the problem of insufficient high osmotic pressure resistance in the traditional waterproof system, and through monitoring the water infiltration in the supporting structure, the relevant personnel can be warned to strengthen the waterproof measures, reduce the occurrence of tunnel diseases, improve the service life of the tunnel, and ensure the safe and reliable operation of the deep tunnel in the complex underground environment. This not only helps to improve the operation efficiency of the tunnel, but also provides solid technical support and protection for the infrastructure construction of coastal areas and marine islands.

[0024] The deep tunnel assembly type composite lining waterproof structure in the application comprises a shield segment layer, a water interception and drainage device, a composite anti-infiltration layer, a molded secondary lining layer and a leakage monitoring system. The TBM tunneling technology and the assembly type segment are used to quickly form a stress structure connected with the surrounding rock, which is convenient for subsequent tunnel construction and improves the construction efficiency and accuracy. The optical fiber water interception belt, the optical fiber infiltration layer and the drainage plate are embedded at the segment joint to cut off the seepage path, monitor the water seepage and ensure that the water that may seep in can be guided and discharged in time to prevent water accumulation from causing structural damage. The composite anti-infiltration 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 optical fiber water interception belt, the optical fiber infiltration layer or the optical fiber waterproof layer, the optical fiber grating generates a monitoring signal, and the optical fiber demodulator processes the signal to facilitate the relevant personnel to monitor the lining. The inner lining is poured by using an integrated pouring concrete method to provide more uniform and seamless inner lining, which further improves the waterproof performance and structural strength. The application uses a multi-layer waterproof structure, has good anti-seismic ability and the ability to adapt to various soil and geological environments, can effectively improve the tunnel anti-infiltration performance, reduce the maintenance cost and ensure long-term stable operation. BRIEF DESCRIPTION OF DRAWINGS

[0025] The application will be further described in detail below with reference to the drawings.

[0026] Figure 1 It is a structural layer schematic view of the deep tunnel assembly type composite waterproof lining structure of the application.

[0027] Figure 2 It is a cross-sectional view of the deep tunnel assembly type composite waterproof lining structure of the application.

[0028] Figure 3 It is a three-dimensional schematic view of the water interception and drainage device in the application.

[0029] Figure 4 It is a cross-sectional view of the water interception and drainage device in the application.

[0030] Figure 5 It is a three-dimensional schematic view of the optical fiber water interception belt in the application.

[0031] Figure 6 It is a structural schematic view of the composite anti-infiltration layer in the application.

[0032] Figure 7 Structure diagram of arranging third fiber grating on third fiber cable in the application.

[0033] Figure 8 Structure diagram of splicing between segments in the application.

[0034] Figure 9 Structure diagram of arranging first fiber grating on first fiber cable in the application.

[0035] Figure 10 Structure diagram of third fiber cable arranged in third cladding in the application.

[0036] Figure 11 Structure diagram of second fiber cable arranged in second cladding in the application.

[0037] Figure 12 Structure diagram of arranging second fiber grating on second fiber cable in the application.

[0038] Figure 13 Structure diagram of connecting fiber demodulator with second fiber cable in the application.

[0039] Figure 14 Structure diagram of connecting drainage ditch with drainage channel in the application.

[0040] Reference signs: 1 - shield segment layer, 1.1 - shield grouting layer, 1.2 - segment layer, 1.2.1 - segment, 2 - composite anti-permeable layer, 2.1 - anti-permeable membrane, 2.2 - fiber waterproof layer, 2.2.1 - third cladding, 2.2.2 - third fiber cable, 2.2.3 - third fiber 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 layer, 4 - intercepting and draining device, 4.1 - fiber intercepting belt, 4.1.1 - wave plate, 4.1.2 - first fiber cable, 4.1.3 - first fiber grating, 4.1.4 - first heating sleeve, 4.1.5 - first cable, 4.2 - fiber permeable layer, 4.2.1 - second cladding, 4.2.2 - second fiber cable, 4.2.3 - second fiber grating, 4.2.4 - second heating sleeve, 4.2.5 - second cable, 4.3 - drainage plate, 4.4 - force transmission pad, 4.5 - connecting plate, 5 - notch, 6 - embedding groove, 7 - protection layer, 8 - drainage ditch, 9 - fiber demodulator, 10 - drainage hole, 11 - bolt, 12 - inverted arch, 13 - drainage channel. DETAILED DESCRIPTION

[0041] As Figures 1-14As shown, in the embodiment, the side close to the inner space of the tunnel is the inner side, the side close to the soil body outside the tunnel is the outer side, and the inverted arch is arranged at the bottom of the tunnel, and the drainage channel 13 is arranged in the inverted arch.

[0042] The deep tunnel assembled composite waterproof lining structure is suitable for complex conditions such as high permeation pressure environment, uneven ground settlement, temperature change, seawater corrosion and earthquake, and comprises a shield segment layer 1; further comprising a composite anti-permeation layer 2, a molded secondary lining layer 3 and a drainage device 4; the shield segment layer 1 is rapidly formed into a stress structure by using TBM tunneling technology and assembled segments, is connected with surrounding rock, is convenient for subsequent tunnel construction, and improves construction efficiency and precision; the shield segment layer 1 comprises 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 a notch 5 is arranged on the inner side of the segment 1.2.1 and close to the splicing joint; the notches 5 of adjacent ring segments 1.2.1 and the notches 5 of adjacent longitudinal segments 1.2.1 are spliced into a slot 6; the drainage device 4 is installed in the slot 6, and a protective layer 7 is arranged in the slot 6 on the inner side of the drainage device 4; the shield grouting layer 1.1 is filled between the outer side of the segment layer 1.2 and the surrounding rock; the composite anti-permeation layer 2 is arranged on the inner side of the shield segment layer 1, further enhancing the waterproof effect; the molded secondary lining layer 3 is arranged on the inner surface of the composite anti-permeation layer 2, preventing water from entering the tunnel;

[0043] The drainage device 4 comprises an optical fiber water cutting belt 4.1, an optical fiber permeation layer 4.2 and a drainage plate 4.3; the cross section of the optical fiber water cutting belt 4.1 is in a wave shape and is embedded in the slot 6; the optical fiber water cutting belt 4.1 is used for guiding water seepage and draining water in a specified direction, is made of flexible material to enhance its adaptability; the long edges of the optical fiber water cutting belt 4.1 on both sides are connected with the segments 1.2.1 on both sides of the slot 6 through the connecting plates 4.5; the connecting plates 4.5 are arranged along the long axis of the optical fiber water cutting belt 4.1; the drainage holes 10 are arranged on the connecting plates 4.5; the optical fiber permeation layer 4.2 is arranged between the optical fiber water cutting belt 4.1 and the drainage plate 4.3; the drainage ditch 8 is arranged on the drainage plate 4.3 and close to the inner side of the slot along the long axis of the drainage plate 4.3; since the slot 6 spliced by the notches 5 of the adjacent ring segments 1.2.1 is longitudinal, and the slot 6 spliced by the notches 5 of the adjacent longitudinal segments 1.2.1 is ring-shaped; therefore, the drainage device 4 is arranged in the longitudinal and ring directions, and the drainage ditch 8 in the drainage device 4 also has longitudinal and ring directions; the longitudinal drainage ditch 8 is communicated with the ring-shaped drainage ditch 8, and the water in the longitudinal drainage ditch 8 can flow into the ring-shaped drainage ditch 8; the lower end of the ring-shaped drainage ditch 8 extends into the inverted arch 12 at the bottom of the tunnel and is communicated with the drainage channel 13 arranged in the inverted arch 12; the water is drained by the drainage channel 13.

[0044] The composite anti-seepage layer 2 is arranged on the inner side of the shield segment layer 1, and comprises, from outside to inside, an anti-seepage film 2.1, an optical fiber waterproof layer 2.2, an inner waterproof layer 2.3 and a high-performance concrete layer 2.4; the anti-seepage film 2.1 is laid on the inner side of the shield segment layer 1, has excellent flexibility and anti-seepage property, and prevents water from penetrating through the inner side of the anti-seepage film 2.1; the optical fiber waterproof layer 2.2 is laid on the inner side of the anti-seepage film 2.1 and has a certain water blocking function; the inner waterproof layer 2.3 is laid on the inner side of the optical fiber waterproof layer 2.2 and is attached to the outer side of the cast secondary lining 3; the inner waterproof layer 2.3 is made of high-performance waterproof material, thereby ensuring the waterproof capability of the inner lining and preventing water from penetrating into the inner lining; the cast 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 cast secondary lining 3; the optical fiber demodulator 9 is connected with the optical fiber permeation layer 4.2 and / or the optical fiber waterproof layer 2.2, receives a monitoring signal generated when water seeps, and performs real-time monitoring on the seepage water.

[0045] In the embodiment, the cast secondary lining 3 is used as the inner lining, and an integrated cast-in-place concrete method is used for lining; after the composite anti-seepage layer is laid, the inner lining is formed by cast-in-place reinforced concrete according to relevant requirements and actual needs; the method provides more uniform and seamless inner lining, and further improves the waterproof property and structural strength.

[0046] In the embodiment, the optical fiber water interception belt 4.1 comprises a wave plate 4.1.1 made of rubber material; a first optical fiber cable 4.1.2 is embedded in the wave plate 4.1.1 at intervals; the first optical fiber cable 4.1.2 has one group and is arranged in parallel at intervals along the width direction of the embedding groove; a first optical fiber grating 4.1.3 is arranged on the optical fiber of the first optical fiber cable 4.1.2 at intervals; 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 with an external power supply through a first electric cable 4.1.5. Connection plates 4.5 are arranged on the two long sides of the optical fiber water interception belt 4.1; the cross section of the connection plate 4.5 is in the shape of an inverted L, and the horizontal plate segment and the vertical plate segment of the connection plate 4.5 are connected with the two side surfaces of the notch 5 through bolts 11 respectively; a force transmission gasket 4.4 is arranged on the side of the horizontal plate segment of the connection plate 4.5 close to the notch; the drainage hole 10 is arranged on the vertical plate segment of the connection plate 4.5; the force transmission gasket 4.4 is made of nitrile rubber material, and the connection plate 4.5 is made of steel plate.

[0047] In the embodiment, the gap between the optical fiber water interception belt 4.1 and the optical fiber permeation layer 4.2 is filled with porous water permeation material; the optical fiber water interception belt 4.1 and the drainage plate 4.3 enhance the waterproof effect of the joint between the segments, and together with the optical fiber permeation layer 4.2, monitor the water seepage of the interception and drainage device 4.

[0048] In this embodiment, the optical fiber penetration layer 4.2 is coated with high-performance sealant such as polyurethane at the joint with the optical fiber cutoff belt 4.1; the drainage plate 4.3 is connected with the two sides of the pipe segment 1.2.1 by using prefabricated clamping slots.

[0049] In this embodiment, the optical fiber penetration 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 made of semi-water permeable material; the second optical fiber cable 4.2.2 is arranged in the second outer cladding 4.2.1 in a width direction of the embedding groove; a second fiber grating 4.2.3 is installed on the optical fiber of the second optical fiber cable 4.2.2; a second heating sleeve 4.2.4 is sleeved on the second fiber grating 4.2.3, and the second heating sleeve 4.2.4 is connected with an external power supply through a second cable 4.2.5.

[0050] In this embodiment, the cutoff and drainage device 4 can discharge part of the infiltrated water through the optical fiber cutoff belt 4.1 after the infiltrated water enters; the water that infiltrates into the optical fiber cutoff belt 4.1 can be discharged outside the lining through the drainage plate, so as to avoid entering the inner lining.

[0051] 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 is arranged in the third outer cladding 2.2.1 in a width direction of the embedding groove; a third fiber grating 2.2.3 is installed on the optical fiber of the third optical fiber cable 2.2.2; a third heating sleeve 2.2.4 is sleeved on the third fiber grating 2.2.3, and the third heating sleeve 2.2.4 is connected with an external power supply through a third cable 2.2.5. In this embodiment, a plurality of fiber grating monitoring points are arranged on the optical fiber cables in the optical fiber cutoff belt 4.1, the optical fiber penetration layer 4.2 and the optical fiber waterproof layer 2.2, and the fiber gratings are sleeved with heating sleeves, the heating sleeves are connected with an external power supply through cables, and the optical fiber cables are connected with a laser light source. The optical fiber cutoff belt 4.1, the optical fiber penetration layer 4.2 and the optical fiber waterproof layer 2.2 are connected with an optical fiber demodulator 9 to form a leakage monitoring system; when the optical fiber cutoff belt 4.1 and / or the optical fiber penetration layer 4.2 and / or the optical fiber waterproof layer 2.2 pass through the infiltrated water, the fiber grating generates a monitoring signal representing heat change and transmits the signal to the optical fiber demodulator, the data output of the optical fiber demodulator is transmitted to a computer or a special analysis system for further data processing, storage and visualization; these systems can analyze the demodulation signal in detail, generate charts and reports, and help engineers to troubleshoot or evaluate performance.

[0052] 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 connected with a live wire and a zero line (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 caused by moisture, and the power supply line uses a waterproof cable to ensure safety and reliability; the voltage stabilizing power supply is energized to increase the temperature of the heating sleeve and transfer heat to the fiber grating sensor, and the leaked water carries away heat, and the fiber grating sensor captures the temperature change. The parallel connection mode is used between the heating sleeves to ensure that the working voltages of all the heating sleeves are the same, each heating sleeve can work independently, and a single heating sleeve failure does not affect other heating sleeves, which facilitates fault troubleshooting and maintenance.

[0053] The construction method of the deep tunnel assembly type composite waterproof lining structure comprises the following steps.

[0054] Step one, tunnel excavation, prefabrication and on-site assembly of segments 1.2.1 to form primary support.

[0055] Step two, install the drainage device 4, install the drainage device 4 at the joint after segment assembly, and set a protective layer 7 on the inner side of the drainage device 4, the protective layer 7 is made of high-performance concrete to improve the waterproof performance of the place and achieve multiple waterproof effects.

[0056] Step three, sequentially set the impermeable membrane 2.1, the optical fiber waterproof layer 2.2, the inner waterproof layer 2.3 and the high-performance concrete layer 2.4, and connect the impermeable membrane 2.1, the optical fiber waterproof layer 2.2, the inner waterproof layer 2.3 and the shield segment layer 1 through the high-performance concrete layer 2.4, which can effectively inhibit the penetration of water and maintain good impermeability in different environments.

[0057] Step four, construct the secondary lining 3 using the integral pouring concrete method, and the construction is completed.

[0058] In this embodiment, when installing the drainage device 4 in step two, the connecting plate 4.5 is used to connect the optical fiber water cutting belt 4.1 with the side wall of the groove, and the porous water permeable material is used to fill the gap between the optical fiber permeable layer 4.2 and the optical fiber water cutting belt 4.1.

[0059] In this embodiment, the interface of the connecting plate 4.5 is cleaned and treated before the drainage device 4 is installed to ensure that the drainage device 4 is tightly connected with the segment, and the connection is sealed to ensure the effectiveness of the waterproof function.

[0060] The above examples are not exhaustive of the embodiments, and other embodiments can also be provided. The above examples are intended to illustrate the present application, and not to limit the scope of protection of the present application. All applications derived from simple changes of the present application fall within the scope of protection of the present application.

Claims

1. A deep tunnel fabricated composite waterproof lining structure, comprising a shield segment layer (1); characterized in that: The shield tunnel structure also comprises a composite anti-seepage layer (2), a moulded secondary lining layer (3) and a water interception device (4); the shield tunnel segment layer (1) comprises a tunnel segment layer (1.2) and a shield grouting layer (1.1); the tunnel segment layer (1.2) is formed by splicing a group of tunnel segments (1.2.1), and a notch (5) is arranged on the inner side of the tunnel segment (1.2.1) near the splicing joint; the notches (5) of adjacent ring-shaped tunnel segments (1.2.1) and the notches (5) of adjacent longitudinal tunnel segments (1.2.1) are combined into a slot (6); the water interception device (4) is installed in the slot (6), and a protective layer (7) is arranged on the inner side of the water interception device (4) in the slot (6); the shield grouting layer (1.1) is filled between the outer side of the tunnel segment layer (1.2) and the surrounding rock; the composite anti-seepage layer (2) is arranged on the inner side of the shield tunnel segment layer (1), further enhancing the waterproof effect; the moulded secondary lining layer (3) is arranged on the inner surface of the composite anti-seepage layer (2), preventing water seepage into the tunnel; The water interception device (4) comprises a fiber water interception belt (4.1), a fiber permeation layer (4.2) and a drainage plate (4.3); the cross section of the fiber water interception belt (4.1) is in a wave shape and is embedded in the slot (6); the long sides of the fiber water interception belt (4.1) on both sides are connected with the tunnel segments (1.2.1) on both sides of the slot (6) through connecting plates (4.5); a drainage hole (10) is arranged on the connecting plate (4.5); the fiber permeation layer (4.2) is arranged between the fiber water interception belt (4.1) and the drainage plate (4.3); a drainage ditch (8) is arranged on the drainage plate (4.3) near the inner side of the slot along the long axis of the drainage plate (4.3); the lower end of the ring-shaped drainage ditch (8) extends into the inverted arch (12) at the bottom of the tunnel and communicates with a drainage channel (13) arranged in the inverted arch (12); The composite anti-seepage layer (2) is arranged on the inner side of the shield tunnel segment layer (1) and comprises, from outside to inside, an anti-seepage film (2.1), a fiber waterproof layer (2.2), an inner waterproof layer (2.3) and a high-performance concrete layer (2.4); The moulded secondary lining layer (3) is arranged on the inner side of the composite anti-seepage layer (2), and a fiber demodulator (9) is arranged in the moulded secondary lining layer (3); the fiber demodulator (9) is connected with the fiber permeation layer (4.2) and / or the fiber waterproof layer (2.2) and is used for receiving a monitoring signal generated when water seepage occurs to realize real-time monitoring of the seepage water.

2. The deep tunnel fabricated composite waterproof lining structure according to claim 1, characterized in that: The moulded secondary lining layer (3) is lined by using an integrated pouring concrete method.

3. The deep tunnel fabricated composite waterproof lining structure according to claim 1, characterized in that: The fiber water interception belt (4.1) comprises a wave-shaped plate (4.1.1) made of rubber material; a first fiber cable (4.1.2) is pre-embedded in the wave-shaped plate (4.1.1); the first fiber cable (4.1.2) is arranged in parallel and at intervals along the width direction of the slot; a plurality of first fiber cables (4.1.2) are arranged in parallel and at intervals along the width direction of the slot; a plurality of second fiber cables (4.1.3) are arranged in parallel and at intervals along the length direction of the slot; the wave-shaped plate (4.1.1) is provided with a plurality of through holes (11) corresponding to the first fiber cables (4.1.2) and the second fiber cables (4.1.3); the wave-shaped plate (4.1.1) is provided with a plurality of through holes (11) corresponding to the first fiber cables (4.1.2) and the second fiber cables (4.1.3); the wave-shaped plate (4.1.1) is provided with a plurality of through holes (11) corresponding to the first fiber cables (4.1.2) and the second fiber cables (4.1.3); ​ 4.1.2) is provided with a first fiber grating (4.1.3); the first fiber grating (4.1.3) is sleeved with a first heating sleeve (4.1.4), and the first heating sleeve (4.1.4) is connected with an external power supply through a first cable (4.1.5); the fiber water cutting belt (4.1) is provided with a connecting plate (4.5) on both sides of the long side; the connecting plate (4.5) is in an inverted L shape, and the horizontal plate segment and the vertical plate segment of the connecting plate (4.5) are connected with the two side surfaces of the notch (5) through bolts (11) respectively; the connecting plate (4.5) is provided with a force transmission pad (4.4) on the side of the horizontal plate segment close to the notch; the drainage hole (10) is arranged on the vertical plate segment of the connecting plate (4.5).

4. The deep tunnel fabricated composite waterproof lining structure according to claim 1, characterized in that: The gap between the fiber water cutting belt (4.1) and the fiber permeation layer (4.2) is filled with porous water permeation material.

5. The deep tunnel fabricated composite waterproof lining structure according to claim 1, characterized in that: The fiber permeation layer (4.2) comprises a second outer cladding (4.2.1) and a second fiber cable (4.2.2); the second outer cladding (4.2.1) is made of semi-water permeable material; the second fiber cable (4.2.2) is arranged in the second outer cladding (4.2.1) in a width direction of the embedding groove; a second fiber grating (4.2.3) is arranged on the fiber of the second fiber cable (4.2.2) in a spaced manner; the second fiber grating (4.2.3) is sleeved with a second heating sleeve (4.2.4), and the second heating sleeve (4.2.4) is connected with an external power supply through a second cable (4.2.5).

6. The deep tunnel fabricated composite waterproof lining structure according to claim 1, characterized in that: The fiber water cutting belt (4.1) and the fiber permeation layer (4.2) are filled with porous water permeation material.

7. A construction method of the deep tunnel assembled composite waterproof lining structure according to any one of claims 1-6, characterized in that, The fiber water cutting belt (4.1) and the fiber permeation layer (4.2) are filled with porous water permeation material. The fiber water cutting belt (4.1) and the fiber permeation layer (4.2) are filled with porous water permeation material. The steps are as follows: Step one, tunnel excavation, prefabrication and on-site assembly of segments (1.2.1) to form initial support; Step two, install the water cutting and draining device (4), install the water cutting and draining device (4) at the joint after segment assembly, and set a protective layer (7) on the inner side of the water cutting and draining device (4); Step three, sequentially set the impermeable membrane (2.1), the fiber water-proof layer (2.2), the inner waterproof layer (2.3) and the high-performance concrete layer (2.4), and connect the impermeable membrane (2.1), the fiber water-proof layer (2.2), the inner waterproof layer (2.3) and the shield segment layer (1) through the high-performance concrete layer (2.4); Step four, construct the secondary lining (3) using an integrated pouring concrete method, and the construction is completed.

8. The construction method of the deep tunnel assembled composite waterproof lining structure according to claim 7, characterized in that: In step two, when installing the water interception and drainage device (4), a connecting plate (4.5) is used to connect the optical fiber water interception belt (4.1) with the side wall of the embedded groove, and a porous water permeable material is used to fill the gap between the optical fiber permeable layer (4.2) and the optical fiber water interception belt (4.1).

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

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