Assembly type tunnel excavation junction connecting device and connecting method thereof

Abstract

The scheme belongs to the technical field of tunnel construction devices, and particularly relates to an assembled tunnel excavation junction connecting device and a connecting method thereof. The device comprises a first wall body and a second wall body, a reserved groove is arranged at the connecting position of the first wall body and the second wall body, a waterproof layer is further arranged at the connecting end of the first wall body and the second wall body, and the device further comprises a first connecting piece, a limiting piece and a detection unit. The detection unit comprises an inverted "U"-shaped tube arranged horizontally and a loading piece, and the loading piece is filled with colored, non-toxic and odorant liquid. The connecting method firmly and stably connects all structures together, and the connecting method is simple and efficient. The device has good waterproof effect during use, and has the advantages of few operation procedures, high production efficiency, firm and stable device as a whole.

Description

TECHNICAL FIELD

[0001] The scheme belongs to the technical field of tunnel construction devices, and particularly relates to an assembled tunnel excavation junction connecting device and a connecting method thereof. BACKGROUND

[0002] A tunnel is an engineering building buried in a stratum and is a form of human utilization of underground space. Tunnel construction is a reasonable construction method proposed by an Austrian scholar from the viewpoint of rock mechanics in long-term tunnel construction practice, is a new engineering construction method formed by adopting a spray anchor technology, monitoring measurement and the like and a rock mechanics theory. The excavation construction is more and more important in urban underground engineering construction, and especially the construction technology of an excavation tunnel passing through a building or a structure needs to control stability indexes of a formed tunnel and ground surface settlement indexes. In the prior art, a tunnel is excavated by a person using a spade or a professional mechanical device, and excavated residue is transported to the ground by a trolley.

[0003] In recent years, the construction efficiency of a tunnel has been significantly improved through upgrading of excavation equipment. At present, in the excavation tunnel construction, a simple splicing treatment is generally adopted for a connecting position of a tunnel, and professional technicians find that the connecting position of the tunnel in the prior art has the following problems: the mechanical performance of a connecting interface is unstable, water seepage and dislocation easily occur between new and old interfaces due to differences in pouring time of adjacent tunnels; the construction process is relatively complex, a large amount of labor is consumed; the construction interference is large, and harm is caused to surrounding built structures; meanwhile, the waterproof treatment of the connecting position is complex and high in requirement. Therefore, the scheme provides an assembled tunnel excavation junction connecting device and a connecting method thereof. SUMMARY

[0004] The scheme provides an assembled tunnel excavation junction connecting device and a connecting method thereof.

[0005] In order to achieve the above purpose, the scheme provides an assembled tunnel excavation junction connecting device and a connecting method thereof, which comprises a first wall body and a second wall body, a reserved groove is arranged at a connecting position of the first wall body and the second wall body, and adjacent ends of the first wall body and the second wall body are connected in a concave-convex mode.

[0006] The connecting end portions of the first wall body and the second wall body are further provided with a waterproof layer.

[0007] The scheme further comprises a first connecting piece arranged in the reserved groove, one end of the first connecting piece is fixedly connected with the first wall body, and the other end of the first connecting piece is fixedly connected with the second wall body.

[0008] The limiting member is fixedly arranged on the first connecting member;

[0009] The detection unit is arranged in the reserved groove; the detection unit comprises an inverted "U"-shaped tube arranged horizontally and a loading member; one end of the "U"-shaped tube penetrates through the first wall, and the other end of the "U"-shaped tube penetrates through the second wall; the ports at the two ends of the "U"-shaped tube are both directed towards the inside of the tunnel; the loading member is arranged in the horizontal section of the "U"-shaped tube; the loading member is arranged in contact with the inner wall of the "U"-shaped tube, and the "U"-shaped tube is provided with a plurality of protrusions on the surface in contact with the loading member; the loading member is filled with colored, non-toxic and odorant liquid;

[0010] The hardness of the "U"-shaped tube is less than the hardness of the first connecting member;

[0011] During operation, the concrete is poured into the reserved groove; the first connecting member and the limiting member are both fixed in the concrete; the concrete structure at the connecting part of the first wall and the second wall is further provided with a coating layer.

[0012] The principle of the present scheme is that the reserved groove arranged between the first wall and the second wall provides a good operation environment for connecting the two tunnel components. The first wall and the second wall constitute the upper arch of the tunnel. The adjacent ends of the first wall and the second wall are connected through concave-convex connection, which makes the connection of the first wall and the second wall have a certain stability and firmness to a certain extent. The first connecting member arranged in the reserved groove is used to connect the first wall and the second wall in the longitudinal direction, and the limiting member arranged in the reserved groove is used to fix the first connecting member, so that after pouring the concrete, the structure between the first connecting member and the limiting member can make the whole device more firm and stable. The waterproof layer arranged between the connecting part of the first wall and the second wall can preliminarily waterproof the connecting part of the tunnel. The coating layer arranged outside the concrete at the connecting part of the first wall and the second wall is used for further waterproof treatment of the connecting part.

[0013] In the present scheme, the hardness of the "U"-shaped tube in the detection unit is less than the hardness of the first connecting member, so that when the first wall and the second wall collapse and split, or when displacement occurs between the first wall and the second wall, the "U"-shaped tube will break or be damaged first. Since the loading member is filled in the "U"-shaped tube, and the protrusions are arranged on the wall of the "U"-shaped tube, when the "U"-shaped tube is damaged, the protrusions will pierce the loading member, and the liquid in the loading member will overflow and flow through the two ends of the "U"-shaped tube to the inside of the tunnel; since the liquid in the loading member is colored and odorant, this can remind the tunnel management personnel that the connecting part of the tunnel may be damaged, so as to facilitate timely maintenance.

[0014] The beneficial effects of the scheme are that: the scheme has good waterproof effect in use through multi-layer waterproof treatment; the device has few operation procedures, simple operation, and high production efficiency. Meanwhile, the concave-convex combination between the first wall body and the second wall body, the pouring forming between the first connecting piece, the limiting piece and the concrete in the reserved groove make the device overall firm and stable. Meanwhile, when the tunnel is damaged or broken, the detection unit in the device can detect the safety hidden danger of the tunnel in advance and timely, so as to achieve the technical effects of detection and early warning; the detection unit in the device is simple in structure, good in detection effect, does not need additional operation, low in use cost and high in practicality.

[0015] Further, the two loading pieces are adjacently arranged in the "U"-shaped tube in an up-down manner, and the two loading pieces are in contact with the protrusions on the adjacent walls of the "U"-shaped tube.

[0016] The two loading pieces are flexible bags, and the two bags are a first bag and a second bag.

[0017] In the device, the two flexible bags are arranged, so that the protrusions are more easily broken and the liquid in the bags is easily discharged; the A glue and the B glue are arranged in the two bags respectively, the A glue and the B glue have a certain strength after mixing, so as to resist the threat caused by the damage of the tunnel, and the mixed A glue and B glue can also be used as a strength supporting structure to increase the firmness and stability of the tunnel connection. In the scheme, the red dye and the essence are added to the A glue and the B glue, so that when the tunnel is damaged, the "U"-shaped tube is broken, the protrusions on the wall of the "U"-shaped tube pierce the bags, and the liquid in the bags flows out. Before the mixed A glue and B glue solidify, part of the glue flows into the tunnel through the ports at both ends of the "U"-shaped tube. The red liquid is eye-catching, and the liquid with essence can attract people's attention. In this way, the tunnel operator is reminded that there may be a safety hazard at the connection. The scheme is simple and practical, has good detection effect, low use cost and high practicality.

[0018] Further, the second connecting piece and the reinforcing piece are further included; the first wall body and the second wall body are connected to form a tunnel unit, the second connecting piece is used for connecting two adjacent tunnel units; the second connecting piece is located in the reserved groove, one end of the second connecting piece is fixedly connected with the wall body of one tunnel unit, and the other end of the second connecting piece is fixedly connected with the wall body of the adjacent tunnel unit; the reinforcing piece is located in the reserved groove, and the reinforcing piece is fixedly connected with the first connecting piece, the second connecting piece and the limiting piece; the detection unit arranged in the same way between the first wall body and the second wall body is further arranged between the two tunnel units, and the hardness of the "U"-shaped tube in the detection unit is less than the hardness of the second connecting piece.

[0019] The second connecting piece is used to connect two adjacent tunnel units in the transverse direction, one end of the second connecting piece is connected with one tunnel unit, and the other end of the second connecting piece is connected with another tunnel unit, so that the two tunnel units are connected, and the reinforcing piece further reinforces the connection between the first connecting piece, the limiting piece and the second connecting piece, so that after the concrete is poured, the device makes the connection joint of the tunnel more stable and firm. Such a design also greatly increases the practicality of the device. Because the hardness of the "U"-shaped pipe in the detection unit is less than the hardness of the second connecting piece, the detection unit arranged between the two tunnel units can also detect and predict potential problems between the two tunnel units in advance, so as to remind the separation, movement and rupture between the two adjacent connected tunnel units.

[0020] Further, the first connecting piece is a plurality of first reinforcing bars, the plurality of first reinforcing bars are arranged in the reserved groove at equal intervals, one end of the first reinforcing bar is fixedly connected with the first wall body, and the other end of the first reinforcing bar is fixedly connected with the second wall body. Reinforcing bars are durable and are excellent materials for construction work.

[0021] Further, the limiting piece is a plurality of first stirrups, the plurality of first stirrups are arranged in the reserved groove at equal intervals, the first stirrup is sleeved on the plurality of first reinforcing bars, and the first stirrup is fixedly connected with the plurality of first reinforcing bars. The stirrup not only has the effect of fixing the reinforcing bar, but also forms a load-bearing structure with the reinforcing bar after pouring concrete, thereby increasing the stability and firmness of the device.

[0022] Further, the second connecting piece is a plurality of second reinforcing bars, the plurality of second reinforcing bars are arranged between the two tunnel units and located in the reserved groove of the tunnel unit, one end of the second reinforcing bar is fixedly connected with the wall body of one tunnel unit, and the other end of the second reinforcing bar is fixedly connected with the wall body of the adjacent tunnel unit; the reinforcing piece is a plurality of second stirrups, the plurality of second stirrups are arranged in the reserved groove at equal intervals, and the second stirrup is fixedly connected with the first reinforcing bar, the second reinforcing bar and the first stirrup. Reinforcing bars and stirrups are solid, durable, firm and stable. Such a design makes the two connection points have reinforcing bars as load-bearing devices in the longitudinal and transverse directions, and the stirrups reinforce and limit the connection of the reinforcing bars multiple times, and the device is more stable and firm after pouring concrete.

[0023] Further, the waterproof layer is a slow-expanding water-swelling sealing strip layer. The sealing strip will automatically swell after being exposed to water, and the sealing strip can fill the gap, thereby achieving the effect of waterproofing.

[0024] Further, the coating layer is a cement-based penetrating crystalline waterproof coating layer. The cement-based penetrating crystalline waterproof coating layer is durable and has good waterproof effect.

[0025] A method for connecting the junction of an assembled tunnel and a cut-and-cover tunnel, the method comprising the following steps:

[0026] 1) providing a first wall and a second wall, setting a reserved groove between the first wall and the second wall, and connecting the adjacent ends of the first wall and the second wall in a concave-convex manner;

[0027] 2) setting a waterproof layer at the connecting part of the first wall and the second wall;

[0028] 3) providing a first connecting piece, setting the first connecting piece in the reserved groove, one end of the first connecting piece being fixedly connected to the first wall by welding, and the other end of the first connecting piece being fixedly connected to the second wall by welding;

[0029] 4) providing a detection unit, fixedly setting the detection unit in the reserved groove, setting one end of the detection unit in connection with the first wall, and setting the other end of the detection unit in connection with the second wall;

[0030] 5) providing a limiting piece, fixedly setting the limiting piece on the first connecting piece;

[0031] 6) the first wall and the second wall constitute a tunnel unit; a second connecting piece is provided between two adjacent tunnel units, the second connecting piece being located in the reserved groove, one end of the second connecting piece being fixedly connected to one tunnel unit, and the other end of the second connecting piece being fixedly connected to another tunnel unit;

[0032] 7) providing a reinforcing piece, fixedly setting the reinforcing piece on the first connecting piece, the second connecting piece, and the limiting piece;

[0033] 8) providing concrete, pouring the concrete into the reserved groove between the first wall and the second wall to complete the filling of the reserved groove, the first connecting piece, the second connecting piece, the limiting piece, the reinforcing piece, and the detection unit being embedded in the concrete;

[0034] 9) providing a coating layer having a waterproof effect, and applying the coating layer on the outer wall formed by pouring the concrete.

[0035] The method can quickly and efficiently complete the connection of the tunnel connecting part, has good waterproof effect, and has firm and stable connection relationship between structures, is simple to operate, has low technical requirement, has low construction cost, and has high practicality. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 is a front view of an embodiment of the present application.

[0037] Figure 2 is a perspective view of an embodiment of the present application.

[0038] Figure 3It is a structural schematic diagram of the detection unit of the embodiment of the application.

[0039] Figure 4 It is Figure 3 It is a structural schematic diagram of the amplification structure of the middle A. DETAILED DESCRIPTION

[0040] The following is further described in detail through specific embodiments:

[0041] The reference signs in the drawings of the specification include: a first wall 1, a second wall 2, a reserved groove 3, a first steel bar 4, a “U”-shaped pipe 5, a first stirrup 6, a second stirrup 7, a second steel bar 8, a first bag 51, a second bag 52, and a spike 53.

[0042] The embodiment is basically as shown in the accompanying Figure 1 and Figure 2 The assembly type tunnel open-cut junction connecting device includes a first wall 1 and a second wall 2, and a reserved groove 3 is arranged at the junction of the first wall 1 and the second wall 2. Adjacent ends of the first wall 1 and the second wall 2 are connected in a concave-convex manner.

[0043] The device further includes a first connecting piece, a limiting piece, a second connecting piece, a detection unit, and a reinforcing piece.

[0044] The first connecting piece is arranged in the reserved groove 3, one end of the first connecting piece is fixedly connected with the first wall 1, and the other end of the first connecting piece is fixedly connected with the second wall 2. The first connecting piece is a plurality of first steel bars 4, and the plurality of first steel bars 4 are evenly arranged in the reserved groove 3. One end of each first steel bar 4 is fixedly connected with the first wall 1, and the other end of each first steel bar 4 is fixedly connected with the second wall 2. In this embodiment, there are eight first steel bars 4, which are divided into two layers in the reserved groove 3, and there are four first steel bars 4 in each layer. In other embodiments, the number of first steel bars 4 can be freely selected according to actual needs.

[0045] The limiting piece is arranged in the reserved groove 3 and is fixedly arranged on the first connecting piece. The limiting piece is a plurality of first stirrups 6, and the plurality of first stirrups 6 are evenly arranged in the reserved groove 3. The first stirrups 6 are sleeved on the plurality of first steel bars 4, and the first stirrups 6 are fixedly connected with the plurality of first steel bars 4. In this embodiment, there are six first stirrups 6.

[0046] The first wall 1 and the second wall 2 are connected to form a tunnel unit. The second connecting piece is used to connect two adjacent tunnel units. The second connecting piece is located in the reserved groove 3, one end of the second connecting piece is fixedly connected with the wall of one tunnel unit, and the other end of the second connecting piece is fixedly connected with the wall of the adjacent tunnel unit. The reinforcing piece is located in the reserved groove, and the reinforcing piece is fixedly connected with the first connecting piece, the second connecting piece, and the limiting piece.

[0047] The second connecting member is a plurality of second reinforcing bars 8, which are evenly distributed between two tunnel units and located in the reserved groove 3 of the tunnel unit. In this embodiment, there are five second reinforcing bars 8. One end of the second reinforcing bar 8 is fixedly connected with the wall of one tunnel unit, and the other end of the second reinforcing bar 8 is fixedly connected with the wall of the adjacent tunnel unit. The reinforcing member is a plurality of second stirrups 7, which are evenly spaced in the reserved groove 3. In this embodiment, there are six second stirrups 7, which are connected and integrally formed. The second stirrup 7 is fixedly connected with the first reinforcing bar 4, the second reinforcing bar 8 and the first stirrup 6.

[0048] The first reinforcing bar 4, the second reinforcing bar 8, the first stirrup 6 and the second stirrup 7 are solid, durable, firm and stable. Such design makes the two connecting parts have reinforcing bars as bearing devices in the longitudinal and transverse directions, and the stirrups reinforce and limit the connection of the reinforcing bars multiple times. After pouring concrete, the device is more stable and firm in comprehensive use.

[0049] As shown in the accompanying drawings Figure 3 , Figure 4 The detection unit is arranged in the reserved groove 3. The detection unit includes a horizontally arranged and inverted "U"-shaped tube 5 and a loading member. The two ends of the "U"-shaped tube 5 are downwardly open, and the "U"-shaped tube 5 is overall horizontally arranged. One end of the "U"-shaped tube 5 penetrates the first wall 1, and the other end of the "U"-shaped tube 5 penetrates the second wall 2. The ports at the two ends of the "U"-shaped tube 5 are both directed toward the inside of the tunnel. The loading member is arranged in the horizontal section of the "U"-shaped tube 5 and located in the tube of the "U"-shaped tube 5. The loading member is in contact with the inner wall of the "U"-shaped tube 5, and the "U"-shaped tube 5 is provided with a plurality of protrusions 53 on the surface in contact with the loading member. The loading member is filled with a colored, non-toxic and odorant liquid.

[0050] The loading member is provided with two loading members, which are arranged adjacent to each other in the "U"-shaped tube 5. The two loading members are in contact with the protrusions 53 on the adjacent walls of the "U"-shaped tube 5. The two loading members are flexible pouches, and the two pouches are a first pouch 51 and a second pouch 52. The first pouch 51 is filled with A glue, and the second pouch 52 is filled with B glue. The A glue and the B glue in the first pouch 51 and the second pouch 52 are used in cooperation. The A glue and the B glue are both adapted with red dye and essence. In this scheme, the red dye is a composite titanium red, and the essence is lavender essence, which is fragrant and easy to attract attention.

[0051] The detection unit is provided with three. Two detection units are located between the first wall body 1 and the second wall body 2, in the middle of the reserved groove 3, in the two layers of the first reinforcing steel bars 4, and each detection unit has two first reinforcing steel bars 4 on the left and right sides. Another detection unit is arranged between the two tunnel units and is also located in the reserved groove 3, the “U”-shaped pipe 5 is arranged horizontally, one end of the “U”-shaped pipe 5 penetrates the wall body of one tunnel unit, the other end of the “U”-shaped pipe 5 penetrates the wall body of the adjacent tunnel unit, and the two ports of the “U”-shaped pipe 5 are both directed to the inside of the tunnel. In the scheme, the hardness strength of the “U”-shaped pipe 5 is smaller than that of the first reinforcing steel bars 4 and the second reinforcing steel bars 8, and in the embodiment, the material of the “U”-shaped pipe 5 is engineering plastic.

[0052] In this way, when the first wall body 1, the second wall body 2 or the units of the adjacent two tunnels are collapsed and split, the “U”-shaped pipe 5 will be broken or damaged first when the first wall body, the second wall body or the units of the adjacent two tunnels are displaced. Since the first bag 51 and the second bag 52 are filled in the “U”-shaped pipe 5, and the protrusions 53 are arranged on the wall of the “U”-shaped pipe 5, when the “U”-shaped pipe 5 is damaged, the protrusions 53 will pierce the first bag 51 and the second bag 52, and the A and B glue in the first bag 51 and the second bag 52 will overflow and flow to the inside of the tunnel through the two ends of the “U”-shaped pipe 5; since the red dye and the essence are adjusted in the A and B glue, the red A and B glue flowing out of the “U”-shaped pipe can remind the tunnel maintenance personnel that the connection position of the tunnel may be damaged, so as to facilitate timely maintenance. In the scheme, the material of the first bag 51 and the second bag 52 can be controlled to achieve that the protrusions 53 in the “U”-shaped pipe 5 cannot pierce the first bag 51 and the second bag 52 under normal conditions of the tunnel, and only when the connection position of the tunnel is displaced and split, the protrusions 53 on the “U”-shaped pipe 5 can pierce the bags. In the scheme, the material of the bags is selected to be rubber, and in other embodiments, the material of the bags can also be plastic, including but not limited to plastic.

[0053] In order to enhance the waterproof effect of the device, a waterproof layer is further arranged at the connection end of the first wall body 1 and the second wall body 2. In the scheme, the waterproof layer is a water-swelling type water-swelling strip layer. The swelling water-stop strip will automatically swell after encountering water, the water-stop strip can fill the gap, so as to achieve the waterproof effect.

[0054] In order to further enhance the waterproof effect of the device, a coating layer is further arranged on the concrete at the connection position of the first wall body 1 and the second wall body 2 after pouring the concrete into the reserved groove 3. In the embodiment, the coating layer is a cement-based permeable crystalline waterproof coating layer. The cement-based permeable crystalline waterproof coating layer is durable and has good waterproof effect.

[0055] A method for connecting the connection position of an assembled tunnel and a cut-and-cover tunnel, the method comprising the following steps:

[0056] 1) providing a first wall 1 and a second wall 2, setting a reserved groove 3 between the first wall 1 and the second wall 2, and concave-convex connecting adjacent ends of the first wall 1 and the second wall 2;

[0057] 2) setting a waterproof layer at the connecting part of the first wall 1 and the second wall 2;

[0058] 3) providing a first connecting piece, setting the first connecting piece in the reserved groove 3, and welding and fixedly connecting one end of the first connecting piece with the first wall 1 and welding and fixedly connecting the other end of the first connecting piece with the second wall 2;

[0059] 4) providing a detection unit, fixedly setting the detection unit in the reserved groove 3, and setting one end of the detection unit in connection with the first wall 1 and setting the other end of the detection unit in connection with the second wall 2;

[0060] 5) providing a limiting piece, fixedly setting the limiting piece on the first connecting piece;

[0061] 6) the first wall 1 and the second wall 2 constitute a tunnel unit; a second connecting piece is provided between two adjacent tunnel units, the second connecting piece is located in the reserved groove 3, one end of the second connecting piece is fixedly connected with one tunnel unit, and the other end of the second connecting piece is fixedly connected with another tunnel unit;

[0062] 7) providing a reinforcing piece, fixedly setting the reinforcing piece on the first connecting piece, the second connecting piece and the limiting piece;

[0063] 8) providing concrete, pouring the concrete in the reserved groove between the first wall 1 and the second wall 2, completing the filling of the reserved groove 3, and embedding the first connecting piece, the second connecting piece, the limiting piece, the reinforcing piece and the detection unit in the concrete;

[0064] 9) providing a coating layer with waterproof effect, and smearing the coating layer on the outer wall formed by pouring the concrete.

[0065] Specific operation: when using the device, first, install the slow-expanding water-swelling sealing strip layer at the gap of the connecting part of the first wall 1 and the second wall 2. Then manually install the first reinforcing steel bar 4, the first stirrup 6, the second reinforcing steel bar 4, the detection unit and the second stirrup 8. Pour the concrete, smear the coating layer on the surface of the concrete after the concrete is poured and formed, and the coating layer is a cement-based penetrating crystalline waterproof coating layer.

[0066] The scheme has good waterproof effect in use through multi-layer waterproof treatment; the device has few operation procedures, simple operation and high production efficiency. Meanwhile, the concave-convex combination between the first wall body 1 and the second wall body 2, the pouring and forming between the first connecting piece, the limiting piece and the concrete in the reserved groove 3 make the device overall firm and stable. Meanwhile, when the tunnel is damaged or broken, the detection unit in the device can detect the safety hidden danger of the tunnel in advance and timely, so as to achieve the technical effects of detection and early warning; the detection unit in the device is simple in structure, good in detection effect, does not need additional operation, low in use cost and high in practicality.

[0067] The above-mentioned is only the embodiment of the present application, and the well-known specific structure and characteristics in the scheme are not described too much. It should be pointed out that, for those skilled in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should be regarded as the protection scope of the present application, and these will not affect the effect and practicality of the present application. The protection scope claimed in the present application should be subject to the content of the claims, and the specific implementation mode and the like recorded in the specification can be used to explain the content of the claims.

Claims

1. A fabricated tunnel excavation junction connecting device, comprising a first wall body (1) and a second wall body (2), characterized in that, The connecting part of the first wall body (1) and the second wall body (2) is provided with a reserved groove (3); the adjacent ends of the first wall body (1) and the second wall body (2) are connected in concave-convex mode; The connecting end part of the first wall body (1) and the second wall body (2) is further provided with a waterproof layer; Further comprising a first connecting member arranged in the reserved groove (3), one end of the first connecting member is fixedly connected with the first wall body (1), and the other end of the first connecting member is fixedly connected with the second wall body (2); A limiting member is arranged in the reserved groove (3), and the limiting member is fixedly arranged on the first connecting member; A detection unit is arranged in the reserved groove (3); the detection unit comprises an inverted "U"-shaped tube (5) arranged horizontally and a loading member, one end of the "U"-shaped tube (5) penetrates through the first wall body (1), and the other end of the "U"-shaped tube (5) penetrates through the second wall body (2), the ports at both ends of the "U"-shaped tube (5) are both directed towards the inside of the tunnel; the loading member is arranged in the horizontal section of the "U"-shaped tube (5), the loading member is arranged in contact with the inner wall of the "U"-shaped tube (5), and the "U"-shaped tube (5) is provided with a plurality of protrusions (53) on the surface in contact with the loading member; the loading member is filled with a colored, non-toxic and odorant liquid; The loading member is provided with two, and the two loading members are arranged adjacent to each other in the "U"-shaped tube (5) in an up-down mode, and the two loading members are arranged in contact with the protrusions (53) on the adjacent tube walls of the "U"-shaped tube (5); The two loading members are both flexible bags, and the two bags are respectively a first bag (51) and a second bag (52), the first bag (51) is filled with A glue, and the second bag (52) is filled with B glue, and the A glue and the B glue are both adapted with red dye and essence; The hardness of the "U"-shaped tube (5) is less than the hardness of the first connecting member; During operation, the concrete is poured into the reserved groove (3), and the first connecting member and the limiting member are fixed in the concrete; the connecting part of the first wall body (1) and the second wall body (2) is further provided with a paint layer.

2. The assembled tunnel excavation junction connecting device according to claim 1, characterized in that: Further comprising a second connecting member and a reinforcing member; the first wall body (1) and the second wall body (2) are connected to form a tunnel unit, the second connecting member is used for connecting two adjacent tunnel units; the second connecting member is located in the reserved groove (3), one end of the second connecting member is fixedly connected with the wall body of one tunnel unit, and the other end of the second connecting member is fixedly connected with the wall body of the adjacent tunnel unit; the reinforcing member is located in the reserved groove (3), and the reinforcing member is fixedly connected with the first connecting member, the second connecting member and the limiting member; a detection unit arranged in the same mode as the detection unit between the first wall body (1) and the second wall body (2) is further arranged between the two tunnel units, and the hardness of the "U"-shaped tube (5) in the detection unit is less than the hardness of the second connecting member.

3. The assembled tunnel excavation junction connecting device according to claim 1, characterized in that: The first connecting member is a plurality of first reinforcing steels (4), and the plurality of first reinforcing steels (4) are evenly arranged in the reserved groove (3), one end of the first reinforcing steel (4) is fixedly connected with the first wall body (1), and the other end of the first reinforcing steel (4) is fixedly connected with the second wall body (2).

4. The assembled tunnel excavation junction connecting device according to claim 1, characterized in that: The limiting member is a plurality of first stirrups (6), which are evenly arranged in the reserved groove (3), the first stirrup (6) is sleeved on the plurality of first reinforcing bars (4), and the first stirrup (6) is fixedly connected with the plurality of first reinforcing bars (4).

5. The assembled tunnel excavation junction connecting device according to claim 2, characterized in that: The second connecting member is a plurality of second reinforcing bars (8), which are evenly distributed between two tunnel units and located in the reserved groove (3) of the tunnel unit, one end of the second reinforcing bar (8) is fixedly connected with the wall of one tunnel unit, and the other end of the second reinforcing bar (8) is fixedly connected with the wall of the adjacent tunnel unit; the reinforcing member is a plurality of second stirrups (7), which are evenly arranged in the reserved groove (3), and the second stirrup (7) is fixedly connected with the first reinforcing bar (4), the second reinforcing bar (8) and the first stirrup (6).

6. The assembled tunnel excavation junction connecting device according to claim 1, characterized in that: The waterproof layer is a slow-expanding water-swelling sealing strip layer.

7. The assembled tunneling junction connecting device according to claim 1, characterized in that: The coating layer is a cement-based permeable crystalline waterproof coating layer.

8. A method for connecting a fabricated tunnel and a tunneling intersection, characterized in that, The method steps are as follows: 1) providing a first wall (1) and a second wall (2), arranging a reserved groove (3) between the first wall (1) and the second wall (2), and connecting the adjacent ends of the first wall (1) and the second wall (2) concave-convexly; 2) arranging a waterproof layer at the connecting part of the first wall (1) and the second wall (2); 3) providing a first connecting member, arranging the first connecting member in the reserved groove (3), one end of the first connecting member is fixedly connected with the first wall (1) by welding, and the other end of the first connecting member is fixedly connected with the second wall (2) by welding; 4) providing a detection unit, fixedly arranging the detection unit in the reserved groove (3); one end of the detection unit is arranged in connection with the first wall (1), and the other end of the detection unit is arranged in connection with the second wall (2); 5) providing a limiting member, fixedly arranging the limiting member on the first connecting member; 6) the first wall (1) and the second wall (2) constitute a tunnel unit; a second connecting member is provided between two adjacent tunnel units, the second connecting member is located in the reserved groove (3), one end of the second connecting member is fixedly connected with one tunnel unit, and the other end of the second connecting member is fixedly connected with another tunnel unit; 7) providing a reinforcing member, fixedly arranging the reinforcing member on the first connecting member, the second connecting member and the limiting member; 8) providing concrete, pouring the concrete into the reserved groove (3) between the first wall (1) and the second wall (2), completing the filling of the reserved groove (3), and the first connecting member, the second connecting member, the limiting member, the reinforcing member and the detection unit are embedded in the concrete; 9) providing a coating layer with waterproof effect, and applying the coating layer on the outer wall formed by pouring the concrete.

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