Tunnel secondary lining vault cavity detection structure and pouring system

Abstract

The application provides a tunnel secondary lining vault anti-disengaging detection structure and pouring system, and belongs to the technical field of tunnel secondary lining. The structure comprises a trolley, a wall head plate, an arched top plate, a pouring unit, an avoiding groove, a water bag, a water tank and a closing unit. The water bag is bonded to the top end of a secondary lining pouring area. After the trolley is opened into the position of the tunnel secondary lining, the water bag and the water tank are connected, and then the wall head plate is installed on the trolley, so that the arched top plate, the tunnel wall and the wall head plate form an arched cavity for pouring concrete. Then the pouring unit pours concrete into the arched cavity through the avoiding groove. When the concrete poured by the grouting pipe fills the arched cavity, all the water in the water bag is pressed into the water tank. When the water in the water tank reaches a specified height, the pouring unit stops grouting, the closing unit closes the avoiding groove, and the concrete is allowed to solidify, so that the concrete anti-disengaging detection in the tunnel and the pouring work of the concrete in the arched cavity are completed.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of tunnel secondary lining, and particularly relates to a tunnel secondary lining vault anti-disengagement detection structure and pouring system. BACKGROUND

[0002] Tunnel construction includes primary support and secondary lining. The secondary lining is pouring concrete or reinforced concrete lining after the primary support is good. The secondary lining is an arched concrete structure, and a steel formwork trolley is generally used to pour concrete on site during construction.

[0003] The Chinese invention with the publication number "CN112593978B" discloses "a secondary lining vault anti-disengagement device and construction method". The secondary lining is arranged below the primary lining. The lower layer of steel mesh and the upper layer of steel mesh are arranged in the secondary lining. The bottom formwork is arranged below the secondary lining of the next segment and is overlapped with the secondary lining of the previous segment. The end formwork is arranged in front of the secondary lining of the next segment. The horizontal grouting pipe one and the horizontal exhaust pipe one are arranged below the primary lining. The horizontal grouting pipe one and the horizontal exhaust pipe one are punched with small holes and wrapped with filter cloth. Three to six detection tubes are arranged along the central axis of each segment of the secondary lining. The top of the detection tube is 1-2 cm lower than the surface of the primary lining. The detection tube penetrates the positioning sleeve fixed on the upper layer of steel mesh and the lower layer of steel mesh. The pouring of new concrete can be detected through the detection tube. However, since the top of the detection tube is 1-2 cm lower than the surface of the primary lining, the pouring of the concrete is stopped when the grout overflows from the detection tube. The pouring of the concrete may be stopped 1-2 cm away from the vault, which cannot guarantee the complete filling of the vault.

[0004] The deficiency of the above-mentioned invention is that the invention cannot guarantee that the tunnel vault is completely filled with concrete during the tunnel construction. SUMMARY

[0005] In view of the above-mentioned defects of the prior art, the purpose of the present application is to provide a tunnel secondary lining vault anti-disengagement detection structure and pouring system, which can solve the problem that it is difficult to determine whether the tunnel vault is completely filled in the prior art.

[0006] To achieve the above-mentioned purpose and other related purposes, the present application provides a tunnel secondary lining vault anti-disengagement detection structure, which comprises:

[0007] A plurality of detection units, each of which comprises a water bag and a water tank;

[0008] The water bag is fixedly installed at the top of the secondary lining pouring area, and the water bags of the plurality of detection units are arranged along the axial direction of the tunnel. The water tank of the water bag is in communication.

[0009] When secondary lining is poured, the water in the water bag is pressed into the water tank by the poured concrete.

[0010] As an option, the color of the water in the water bag is different from the color of the water in other water bags.

[0011] As an option, each detection unit further comprises a first connecting pipe;

[0012] One end of the first connecting pipe is in communication with the water outlet end of the water bag, and the other end of the first connecting pipe is in communication with the water tank.

[0013] As an option, each detection unit further comprises a valve;

[0014] The valve is fixed to the first connecting pipe, and the valve can open or close the first connecting pipe.

[0015] As an option, the structure further comprises an air pump and a plurality of second connecting pipes;

[0016] One end of each of the plurality of second connecting pipes is in communication with the corresponding air outlet end of the air pump, and the other end of each of the plurality of second connecting pipes is in communication with the corresponding water tank;

[0017] The end of the first connecting pipe in communication with the water tank is located at the lower part of the water tank.

[0018] The present application also provides a pouring system comprising the tunnel secondary lining vault anti-emptying detection structure described above, the system comprising:

[0019] A trolley and two wall head plates, the trolley is fixed with an arched top plate, the two wall head plates are installed on the trolley, and the two wall head plates are located at the two ends of the trolley in the axial direction of the tunnel, the arched top plate, the tunnel wall and the two wall head plates form an arched cavity for pouring concrete;

[0020] The water bag is located in the arched cavity.

[0021] As an option, the system further comprises a plurality of pouring units, each of which comprises a grouting corrugated pipe, a concrete storage tank and a grouting pipe;

[0022] The concrete storage tank is fixedly installed on the trolley, the liquid inlet end of the grouting corrugated pipe is in communication with the concrete storage tank, the liquid outlet end of the grouting corrugated pipe is in communication with the liquid inlet end of the grouting pipe, the top end of the arched top plate is provided with an avoiding slot, and the liquid outlet end of the grouting pipe injects concrete into the arched cavity through the avoiding slot.

[0023] The liquid outlet end of the grouting pipe is located below the water bag in the arched cavity.

[0024] As an option, the system further comprises a plurality of closed units, each of which comprises a first baffle, a first sliding rail, a first telescopic power source and two first mounting blocks;

[0025] The first baffle is located below the avoidance groove, the upper end surface of the first baffle is in close contact with the lower end surface of the arched roof, and the first baffle seals the lower end of the avoidance groove.

[0026] The grouting pipe is fixed to the first baffle, and the liquid outlet end of the grouting pipe is flush with the upper end surface of the first baffle after penetrating the upper end surface of the first baffle, and concrete is injected into the arched cavity.

[0027] The first mounting blocks are located between the first baffle and the concrete storage tank, and the two first mounting blocks are located on the two sides of the grouting pipe, respectively.

[0028] The first sliding rail is installed on the concrete storage tank, and the sliding guide direction of the first sliding rail is parallel to the axial direction of the tunnel.

[0029] The first mounting blocks are slidingly installed on the first sliding rail.

[0030] The extension end of the first telescopic power source is fixed to the first mounting block, the fixed end of the first telescopic power source is fixedly installed on the trolley, and the telescopic direction of the first telescopic power source is consistent with the axial direction of the tunnel.

[0031] The grouting pipe moves along the axial direction of the tunnel under the action of the first telescopic power source.

[0032] As an option, each of the closed units further comprises a rectangular baffle and a second telescopic power source.

[0033] The fixed end of the second telescopic power source is fixed to the first mounting block, the extension direction of the second telescopic power source is vertically upward, the extension end of the second telescopic power source is fixedly connected with the rectangular baffle, the size of the rectangular baffle is the same as that of the avoidance groove, the first baffle is provided with a rectangular through hole penetrating the upper and lower end surfaces, and the second telescopic power source drives the rectangular baffle to move up and down in the rectangular through hole.

[0034] When the first baffle moves to the position directly below the avoidance groove under the action of the first telescopic power source, the rectangular baffle extends into the avoidance groove under the action of the second telescopic power source.

[0035] As described above, the tunnel secondary lining arch top anti-disengagement detection structure and pouring system has at least the following beneficial effects:

[0036] 1、The present application judges the amount of water in the water bag into the water tank, quantitative judgment secondary lining to be poured area of the top whether is poured with concrete, when the water in the water bag is all pressed into the water tank, it shows that the top of the secondary lining to be poured area has been filled with concrete, thereby preventing the top of the secondary lining to be poured area from being empty when pouring.

[0037] 2、The present application adjusts the grouting pipe below the corresponding water bag when grouting, when detecting that the water in a certain water tank is less pressed back by the water bag, immediately speeds up the speed of the corresponding grouting pipe pumping concrete, so that every place of the top of the tunnel is filled with concrete.

[0038] 3、The present application pushes the concrete in the avoidance groove into the arched cavity under the pushing of the second telescopic power source after the concrete pouring is completed, so that there is no concrete in the avoidance groove that coagulates with the arched cavity when the trolley is driven away for pouring the next place, and the structure design is ingenious. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 It is shown as the schematic diagram of the three-dimensional structure of the present application;

[0040] Figure 2 It is shown as the schematic diagram of the structure related to the water bag and the first connecting pipe of the present application;

[0041] Figure 3 It is shown as the schematic diagram of the structure related to the arched cavity of the present application; Figure 2 It is shown as the enlarged view of A in the present application.

[0042] Figure 4 It is shown as the schematic diagram of the structure inside the trolley of the present application;

[0043] Figure 5 It is shown as the partial sectional view of the inside of the water tank of the present application;

[0044] Figure 6 It is shown as the partial sectional view of the structure related to the arched cavity of the present application;

[0045] Figure 7 It is shown as the schematic diagram of the structure related to the closed unit of the present application;

[0046] Figure 8 It is shown as the schematic diagram of the structure related to the rectangular through hole of the present application.

[0047] In the figure: 101, trolley; 102, wall head plate; 103, arched top plate; 104, arched cavity; 105, avoidance groove;

[0048] 201, grouting pipe; 202, grouting corrugated pipe; 203, concrete storage tank; 204, pump body;

[0049] 301, water bag; 302, water tank; 303, first connecting pipe; 304, connecting head; 305, valve;

[0050] 401, air pump; 402, second connecting pipe; 501, first baffle; 502, first sliding rail; 503, first telescopic power source; 504, first mounting block; 505, rectangular baffle; 506, second telescopic power source; 507, rectangular through hole; 508, second sliding rail. DETAILED DESCRIPTION

[0051] The following specific embodiments illustrate the embodiments of the present application, and those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in the specification.

[0052] Please refer to Figures 1 to 8 It should be understood that the structures, proportions, sizes, etc. shown in the drawings of the specification are only used to cooperate with the content disclosed in the specification for those skilled in the art to understand and read, and are not used to limit the defined conditions under which the present application can be implemented, so they do not have technical significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects and purposes that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the specification are only for the convenience of clear description, and are not used to limit the scope of the present application. The change or adjustment of the relative relationship, without substantially changing the technical content, is also considered as the scope of the present application.

[0053] The following embodiments are only for illustration. The various embodiments can be combined, which are not limited to the content shown in the following single embodiment.

[0054] Please refer to Figure 1 and Figure 5 The present application provides a tunnel secondary lining vault void detection structure, which comprises:

[0055] A plurality of detection units, each of which comprises a water bag 301 and a water tank 302;

[0056] The water tank 302 is not limited here, and its function is to observe the amount of water pressed into the water bag 301. The water tank 302 can be fully transparent or partially transparent, or the amount of water in the water tank 302 can be detected by a water level detector or other detection device;

[0057] The water bag 301 is fixedly installed at the top of the secondary lining pouring area, and the water bags 301 of the plurality of detection units are arranged along the axial direction of the tunnel, and the water bag 301 and the water tank 302 are connected;

[0058] The water bag 301 is fixedly installed at the top end of the secondary lining pouring area, which can be fixed by magic tape or limiting nails.

[0059] When the secondary lining is poured, the water in the water bag 301 is pressed into the water tank 302.

[0060] In this embodiment, when the secondary lining is poured in the tunnel, the water in the water bag 301 is pressed into the water tank 302. When the concrete for pouring the secondary lining fills the top end of the pouring area, the water in the water bag 301 is completely pressed into the water tank 302. At this time, the water in the water tank 302 is observed to stop grouting when the specified height is reached, thereby completing the concrete anti-cavity detection work in the tunnel through the water bag 301. The present application can determine whether the top end of the pouring area is poured with concrete by judging how much water in the water bag 301 enters the water tank 302, thereby preventing the top end of the pouring area from being poured off during pouring.

[0061] Please refer to Figure 1 The color of the water in the water bag 301 is different from that of the water in the other water bags 301.

[0062] In this embodiment, when the water in the water bag 301 is pressed into the corresponding water tank 302, the water pressed into the different water tanks 302 has different colors. The present application can observe the water bags 301 at different positions of the top end of the pouring area corresponding to the water tanks 302 with different colors of water pressed in, thereby more intuitively reflecting how much water is pressed into each water tank 302.

[0063] Please refer to Figures 2 to 5 Each of the detection units further comprises a first connecting pipe 303;

[0064] One end of the first connecting pipe 303 is in communication with the water outlet end of the water bag 301, and the other end of the first connecting pipe 303 is in communication with the water tank 302;

[0065] A connecting head 304 is installed on the first connecting pipe 303, which can connect or disconnect the water bag 301 and the water tank 302;

[0066] The first connecting pipe 303 is divided into a first section and a second section, the connecting head 304 is two flanges, the first flange and the second flange, one end of the first section is in communication with the water bag 301, the other end of the first section is fixedly connected with the first flange, one end of the second section is in communication with the water tank 302, the other end of the second section is fixedly connected with the second flange, and the first flange and the second flange are connected by bolts, thereby connecting the first section and the second section;

[0067] The connecting head 304 can also be a hard cannula, one end of which is inserted into the first section, and the other end of which is inserted into the second section, thereby connecting the first section and the second section, and further connecting the water bag 301 and the water tank 302.

[0068] In this embodiment, when the secondary lining in the tunnel is poured, the water bag 301 and the water tank 302 are connected through the connecting head 304 at this time, and the water in the water bag 301 can enter the water tank 302 through the first connecting pipe 303;

[0069] After the secondary lining in the tunnel is poured, the connecting head 304 is disconnected, so that the water bag 301 and the water tank 302 are disconnected.

[0070] The first connecting pipe 303 of the present application is a detachable connection, so as to facilitate the quick connection and disconnection of the water bag 301 and the water tank 302.

[0071] Please refer to Figure 2 Each of the detection units further comprises a valve 305;

[0072] The valve 305 is located between the water tank 302 and the connecting head 304;

[0073] The valve 305 is fixedly connected to the first connecting pipe 303, and the valve 305 can open or close the first connecting pipe 303.

[0074] In this embodiment, when the secondary lining in the tunnel is poured, the water bag 301 and the tank are connected through the connecting head 304, and then the valve 305 is opened, so that the first connecting pipe 303 is opened, and at this time the water in the water bag 301 can enter the water tank 302 through the first connecting pipe 303 when the secondary lining is poured;

[0075] After the secondary lining in the tunnel is poured, the valve 305 is closed first, and then the connecting head 304 is disconnected, so that the water tank 302 and the water bag 301 are separated.

[0076] The present application can control the water in the water tank 302 not to flow out through the first connecting pipe 303 when the connecting head 304 is disconnected after the secondary lining is poured, by means of the valve 305, and the structure design is ingenious.

[0077] Please refer to Figure 4 And Figure 5 The structure further comprises an air pump 401 and a plurality of second connecting pipes 402;

[0078] One end of each of the second connecting pipes 402 is connected to a corresponding air outlet end of the air pump 401, and the other end of each of the second connecting pipes 402 is connected to a corresponding water tank 302;

[0079] The first connecting pipe 303 is communicated with one end of the water tank 302, which is located at the lower part of the water tank 302.

[0080] In this embodiment, each water tank 302 is filled with water before pouring the secondary lining in the tunnel, and each water bag 301 is empty. First, the valve 305 is closed, and then the water tank 302 and the water bag 301 are communicated through the connecting head 304. After that, the valve 305 is opened, and the air pump 401 is started. The air pump 401 pressurizes the water in each water tank 302 into the corresponding first connecting pipe 303, and then into each water bag 301. Then, the valve 305 and the air pump 401 are closed, and the subsequent operation is waited. In this embodiment, the valve 305 is closed before the connecting head 304 is communicated, so that the water in the water tank 302 cannot flow out through the first connecting pipe 303. After the connecting head 304 is communicated, the water in the water tank 302 can be pressurized into the water bag 301 through the air pump 401. The structure design is ingenious.

[0081] Please refer to Figure 1 , Figure 5 and Figure 6 , the present application also provides a pouring system, which comprises the tunnel secondary lining vault anti-disengaging detection structure described above. The system comprises:

[0082] The trolley 101 is fixedly connected with an arched top plate 103, and two wall head plates 102 are installed on the trolley 101. The two wall head plates 102 are located at the two ends of the trolley 101 in the axial direction of the tunnel. An arched cavity 104 for pouring concrete is formed between the arched top plate 103, the tunnel wall and the two wall head plates 102.

[0083] The water bag 301 is located in the arched cavity 104.

[0084] The first connecting pipe 303 is communicated with the water tank 302 after extending out of the arched cavity 104.

[0085] In this embodiment, after the trolley 101 is opened into the designated position in the tunnel, the water bag 301 and the water tank 302 are first communicated, and then the wall head plate 102 is installed on the trolley 101, so that the arched cavity 104 for pouring concrete is formed between the arched top plate 103, the tunnel wall and the two wall head plates 102. Then, the concrete is poured into the rectangular cavity. In the process of gradually moving up, the water in the water bag 301 is pressurized into the water tank 302. When the poured concrete fills the arched cavity 104, the water in the water bag 301 is completely pressurized into the water tank 302. At this time, the grouting is stopped, and the concrete pouring work in the tunnel is completed. The present application can determine whether the top of the tunnel is poured with concrete by judging how much water in the water bag 301 enters the water tank 302, so as to prevent the top of the tunnel from being disengaged during pouring.

[0086] Please refer to Figure 1 , Figure 5 , Figure 6 and Figure 7 , the pouring unit comprises a grouting bellows 202, a concrete storage tank 203 and a grouting pipe 201;

[0087] The concrete storage tank 203 is fixedly installed on the trolley 101, the concrete storage tank 203 is internally provided with mixed concrete, the pump body 204 is fixedly installed in the concrete storage tank 203, the inlet end of the pump body 204 is inserted into the concrete, the outlet end of the pump body 204 is in communication with the liquid inlet end of the grouting bellows 202, the liquid outlet end of the grouting bellows 202 is in communication with the liquid inlet end of the grouting pipe 201, the top end of the arched top plate 103 is provided with an avoiding slot 105, and the liquid outlet end of the grouting pipe 201 injects concrete into the arched cavity 104 through the avoiding slot 105;

[0088] The liquid outlet end of the grouting pipe 201 is located below the water bag 301 in the arched cavity 104.

[0089] In this embodiment, when it is needed to inject concrete into the arched cavity 104, the pump body 204 extracts the concrete in the concrete storage tank 203 to enter the arched cavity 104 in sequence through the grouting bellows 202 and the grouting pipe 201. The present application only needs to extract the concrete through the pump body 204 when injecting the concrete into the arched cavity 104, and the structure design is ingenious.

[0090] Please refer to Figure 1 , Figure 4 and Figure 6 , the system further comprises a sealing unit, and the sealing unit comprises a first baffle 501, a first sliding rail 502, a first telescopic power source 503 and two first mounting blocks 504;

[0091] The first telescopic power source 503 is not limited here, and its function is to provide telescopic power, which can be a pneumatic cylinder, a hydraulic cylinder or an electric telescopic rod;

[0092] The first baffle 501 is located below the avoiding slot 105, the upper end surface of the first baffle 501 is in close contact with the lower end surface of the arched top plate 103, and the first baffle 501 seals the lower end of the avoiding slot 105;

[0093] The grouting pipe 201 is fixedly connected to the first baffle 501, the liquid outlet end of the grouting pipe 201 penetrates through the upper end surface of the first baffle 501 and is flush with the upper end surface of the first baffle 501, and the grouting pipe 201 injects concrete into the arched cavity 104;

[0094] The first mounting block 504 is located between the first baffle 501 and the concrete storage tank 203, and two first mounting blocks 504 are respectively located on both sides of the grouting pipe 201, and the two first mounting blocks 504 are both fixedly connected to the first baffle 501;

[0095] The first sliding rail 502 is mounted on the concrete storage tank 203, and the sliding direction of the first sliding rail 502 is parallel to the axial direction of the tunnel;

[0096] The first mounting block 504 is slidably mounted on the first sliding rail 502;

[0097] The lower end surface of the arched top plate 103 is provided with a second sliding rail 508, and the sliding direction of the second sliding rail 508 is parallel to the axial direction of the tunnel;

[0098] The first baffle 501 is slidably mounted on the second sliding rail 508;

[0099] The extension end of the first telescopic power source 503 is fixedly connected to the first mounting block 504, the fixed end of the first telescopic power source 503 is fixedly mounted on the trolley 101, and the telescopic direction of the first telescopic power source 503 is consistent with the axial direction of the tunnel;

[0100] The grouting pipe 201 moves along the axial direction of the tunnel under the action of the first telescopic power source 503.

[0101] In this embodiment, since the vault in the tunnel has some recessed positions, some water bags 301 will be correspondingly installed in the recessed positions, so that the positions between adjacent water bags 301 will have some deviation, so after the trolley 101 enters the designated position in the tunnel, the grouting pipe 201 corresponding to the water bag 301 below needs to be adjusted to the lower side of the water bag 301, specifically by pushing the first mounting block 504 to move through the first telescopic power source 503, the first mounting block 504 drives the grouting pipe 201 to move to the lower side of the corresponding water bag 301 in the avoiding groove 105, and then subsequent grouting operation is performed. When grouting, the grouting pipe 201 is adjusted to be below the corresponding water bag 301, and when it is monitored that the water in a water tank 302 is pressed back by the water bag 301, the speed of the grouting pipe 201 corresponding to the water tank 302 is immediately increased, so that every position of the top of the tunnel is filled with concrete.

[0102] Please refer to Figures 6 to 8 Each of the closed units further comprises a rectangular baffle 505 and a second telescopic power source 506;

[0103] The second telescopic power source 506 is not limited here, and its function is to provide telescopic power, which can be a pneumatic cylinder, a hydraulic cylinder, an electric telescopic rod, etc.

[0104] The fixed end of the second telescopic power source 506 is fixed on the first mounting block 504, the extension direction of the second telescopic power source 506 is vertically upward, the extension end of the second telescopic power source 506 is fixed with a rectangular baffle 505, the size of the rectangular baffle 505 is the same as the size of the avoiding groove 105, the first baffle 501 is provided with a rectangular through hole 507 through the upper and lower end faces, the second telescopic power source 506 drives the rectangular baffle 505 to move up and down in the rectangular through hole 507.

[0105] When the first baffle 501 is moved to the directly below of the avoiding groove 105 under the action of the first telescopic power source 503, the rectangular baffle 505 is extended into the avoiding groove 105 under the action of the second telescopic power source 506.

[0106] In this embodiment, when the grouting of the grouting pipe 201 is completed, the first baffle 501 is moved to the directly below of the avoiding groove 105 under the action of the first telescopic power source 503, then the rectangular baffle 505 is extended into the avoiding groove 105 under the action of the second telescopic power source 506, and stops until the upper end face of the rectangular baffle 505 is flush with the upper end of the avoiding groove 105, so as to complete the pouring work of the concrete. After the pouring of the concrete is completed, the concrete in the avoiding groove 105 can be pushed into the arched cavity 104 by the rectangular baffle 505, so that there is no concrete in the avoiding groove 105 that is coagulated with the arched cavity 104 when the trolley 101 is moved away, and the structure design is ingenious.

[0107] The above embodiments are only illustrative of the principles and effects of the present application, and are not used to limit the present application. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought of the present application should be covered by the claims of the present application.

Claims

1. A placement system, characterized by, The system comprises a tunnel secondary lining vault emptying detection structure, the structure comprises: a plurality of detection units, each of the detection units comprises a water bag and a water tank; the water bag is fixedly installed at the top of a secondary lining pouring area, and the water bags of the plurality of detection units are arranged along the axial direction of the tunnel, and the water bag and the water tank are in communication; when the secondary lining is poured, the water in the water bag is pressed into the water tank by the poured concrete; the system further comprises a trolley and two wall head plates, the trolley is fixedly connected with an arched top plate, the two wall head plates are installed on the trolley, and the two wall head plates are located at the two ends of the trolley along the axial direction of the tunnel, the arched top plate, the tunnel wall and the two wall head plates form an arched cavity for pouring concrete; the water bag is located in the arched cavity; the system further comprises a plurality of pouring units, each of the pouring units comprises a grouting corrugated pipe, a concrete storage tank and a grouting pipe; the concrete storage tank is fixedly installed on the trolley, the liquid inlet end of the grouting corrugated pipe is in communication with the concrete storage tank, the liquid outlet end of the grouting corrugated pipe is in communication with the liquid inlet end of the grouting pipe, the top end of the arched top plate is provided with an avoiding slot, and the liquid outlet end of the grouting pipe injects concrete into the arched cavity through the avoiding slot; the liquid outlet end of the grouting pipe is located below the water bag in the arched cavity; the system further comprises a plurality of sealing units, each of the sealing units comprises a first baffle, a first sliding rail, a first telescopic power source and two first mounting blocks; the first baffle is located below the avoiding slot, the upper end surface of the first baffle is in close contact with the lower end surface of the arched top plate, and the first baffle seals the lower end of the avoiding slot; the grouting pipe is fixedly connected to the first baffle, the liquid outlet end of the grouting pipe is flush with the upper end surface of the first baffle after penetrating through the upper end surface of the first baffle, and the grouting pipe injects concrete into the arched cavity; the first mounting blocks are located between the first baffle and the concrete storage tank, the two first mounting blocks are respectively located on the two sides of the grouting pipe, and the two first mounting blocks are fixedly connected to the first baffle; the first sliding rail is installed on the concrete storage tank, and the sliding guide direction of the first sliding rail is parallel to the axial direction of the tunnel; the first mounting blocks are slidingly installed on the first sliding rail; the extension end of the first telescopic power source is fixedly connected to the first mounting block, the fixed end of the first telescopic power source is fixedly installed on the trolley, and the telescopic direction of the first telescopic power source is consistent with the axial direction of the tunnel; the grouting pipe moves along the axial direction of the tunnel under the action of the first telescopic power source.

2. A placement system according to claim 1, wherein, The color of the water in the water bag is different from that of the water in other water bags.

3. A placement system according to claim 1, wherein, Each of the detection units further comprises a first connecting pipe; one end of the first connecting pipe is in communication with the water outlet end of the water bag, and the other end of the first connecting pipe is in communication with the water tank.

4. A placement system according to claim 3, wherein, Each of the detection units further comprises a valve; the valve is fixedly connected to the first connecting pipe, and the valve can open or close the first connecting pipe.

5. A placement system according to claim 3, wherein, The structure further comprises an air pump and a plurality of second connecting pipes; one end of each of the second connecting pipes is in communication with the corresponding air outlet end of the air pump, and the other end of each of the second connecting pipes is communicated into the corresponding water tank. The first connecting pipe is communicated with one end of the water tank.

6. A placement system according to claim 1, wherein, Each of the closed units further comprises a rectangular baffle and a second telescopic power source. The fixed end of the second telescopic power source is fixed to the first mounting block, the extension direction of the second telescopic power source is vertically upward, the extension end of the second telescopic power source is fixed with a rectangular baffle, the size of the rectangular baffle is same as that of the avoiding groove, the first baffle is provided with a rectangular through hole penetrating through the upper and lower end faces, and the second telescopic power source drives the rectangular baffle to move up and down in the rectangular through hole. When the first baffle moves to the position directly below the avoiding groove under the action of the first telescopic power source, the rectangular baffle extends into the avoiding groove under the action of the second telescopic power source.

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