Tunnel construction trolley

Abstract

The utility model discloses a tunnel construction trolley, including base, two parallelly arranged support frame, two laying trolley, two walking tracks, installation shaft and drive assembly, two support frames are connected with base, two support frames all are installed with one walking track, two laying trolleys are correspondingly arranged with support frame, every laying trolley all includes frame, walking mechanism and fixed axle, walking mechanism is located the upper end of frame, is engaged with corresponding walking track, the lower end of frame is equipped with the fixed axle of horizontal extension, installation shaft detachably sleeve connects between two fixed axles, and the outer surface of installation shaft can wind geotextile, drive assembly is installed in at least one support frame, and is connected with two walking tracks transmission, is used for driving two walking tracks synchronous reciprocation, and drives two frames synchronous reciprocation to lay geotextile. Can realize geotextile automatic laying, reduces high altitude operation personnel, promotes geotextile laying efficiency and quality.

Description

Technical Field

[0001] This utility model relates to the field of tunnel engineering technology, and in particular to a tunnel construction trolley. Background Technology

[0002] In recent years, with the rapid advancement of urbanization, the continuous expansion of urban scale, and the constant concentration of population, the demand for underground space development has shown an increasing trend. Underground space plays a crucial role in alleviating urban land shortages and improving urban infrastructure. Among the many underground engineering construction methods, the open-cut method stands out due to its unique advantages. When there are no limitations such as surface traffic congestion or complex surrounding environments in the construction area, the open-cut method becomes the preferred construction method due to its simple construction technology and economic efficiency.

[0003] The cut-and-cover method, a traditional underground engineering construction technique, has a relatively straightforward construction principle. It involves directly excavating earth and rock at the surface to gradually form the desired underground space or structure. This method not only allows construction workers to directly observe the construction process, facilitating timely problem detection and resolution, but also offers relatively lower costs compared to other complex construction methods. For these reasons, the cut-and-cover method has been widely used in subway, tunnel, and underground passage projects.

[0004] In the construction of open-cut underground engineering projects, groundwater control is a crucial link in ensuring project quality and safety, holding an extremely important position. Waterproofing the outer arc surface of the tunnel is the first and most important line of defense in ensuring the effectiveness of waterproofing in open-cut tunnels. Typically, after tunnel construction is completed, construction workers need to perform a series of rigorous and meticulous operations on the outer arc surface. First, spray curing is carried out to maintain the humidity of the outer arc surface and prevent cracks caused by dryness; then, waterproof coating is sprayed to enhance the waterproofing performance of the outer arc surface; finally, geotextile is laid to form a reliable waterproof barrier, thus comprehensively ensuring the waterproofing quality of the outer arc surface of the tunnel. Utility Model Content

[0005] To overcome the difficulties and low efficiency of laying waterproof geotextiles on high-altitude curved sections, while ensuring the safety of workers, this utility model provides a tunnel construction trolley that can automatically lay geotextiles, reduce the number of workers at heights, and improve the efficiency and quality of geotextile laying.

[0006] This utility model provides a tunnel construction trolley, including: a base, two parallel support frames, two laying trolleys, two traveling tracks, a mounting shaft, and a drive assembly;

[0007] The two support frames are connected to the base;

[0008] Both of the aforementioned support frames are equipped with one of the aforementioned travel tracks;

[0009] The two laying trolleys are correspondingly arranged with the support frame;

[0010] Each of the laying trolleys includes a frame, a traveling mechanism, and a fixed axle;

[0011] The traveling mechanism is located at the upper end of the vehicle frame and engages with the corresponding traveling track;

[0012] The lower end of the frame is provided with the horizontally extending fixed shaft;

[0013] The mounting shaft is detachably sleeved between the two fixed shafts, and the outer surface of the mounting shaft can be wrapped with geotextile.

[0014] The drive assembly is mounted on at least one of the support frames and is connected to the two travel tracks for synchronous reciprocating motion, and drives the two vehicle frames to reciprocate synchronously to lay the geotextile.

[0015] Optionally, the support frame is provided with a mounting groove;

[0016] The travel track is located in the mounting slot.

[0017] Optionally, both sides of the mounting groove are provided with a transverse fixing plate and a lateral fixing plate;

[0018] The horizontal fixing plate is located at the opening of the mounting groove;

[0019] The two ends of the lateral fixing plate are respectively connected to the corresponding transverse fixing plate and the outer side wall of the mounting groove;

[0020] Both sides of the frame are connected by a transverse rolling shaft and a lateral rolling shaft.

[0021] The transverse rolling shaft abuts against the corresponding transverse fixing plate;

[0022] The lateral rolling shaft abuts against the corresponding lateral fixing plate.

[0023] Optionally, the drive assembly includes a reversible motor and a gear set;

[0024] The output shaft of the reversible motor is connected to the gear set;

[0025] The gear set meshes with the two travel tracks.

[0026] Optionally, the tunnel construction trolley may also include a control box located at the bottom of any of the support frames;

[0027] The control box is connected to the forward and reverse motor.

[0028] Optionally, the walking mechanism includes walking wheels and a fixed frame;

[0029] The mounting bracket is connected to the upper end of the vehicle frame;

[0030] The traveling wheel is connected to the fixed frame and engages with the corresponding traveling track.

[0031] Optionally, the travel track is a toothed chain;

[0032] The traveling wheel is a sprocket that meshes with the toothed chain.

[0033] Optionally, the tunnel construction trolley may also include nozzles, pipelines, and a power unit;

[0034] The nozzles are spaced apart on the side of the support frame facing the tunnel;

[0035] The pipeline is installed on the support frame and is connected to the nozzle;

[0036] The power unit is connected to the pipeline and is used to transport external water to the pipeline.

[0037] The beneficial effects of the above-mentioned technical solutions provided in the embodiments of this utility model include at least the following:

[0038] This embodiment of the invention provides a tunnel construction trolley, which includes two parallel support frames, two laying trolleys, two traveling tracks, an installation shaft, and a drive assembly. The geotextile to be laid is wound around the installation shaft, which is then fitted between the fixed shafts of the two laying trolleys. The drive assembly drives the two traveling tracks to reciprocate synchronously, and consequently, the frames of the two laying trolleys to reciprocate synchronously for geotextile laying. The drive assembly is connected to the two traveling tracks, thereby driving the two frames to reciprocate synchronously. This ensures that the laying trolleys on both sides work in a coordinated manner during geotextile laying, avoiding unevenness and wrinkles caused by asynchronous movement of the laying trolleys, thus improving the quality and efficiency of geotextile laying. It replaces the traditional method of workers carrying out dangerous manual laying operations on high-altitude scaffolding or simple platforms, significantly improving construction safety and effectively increasing work efficiency. It effectively solves the problems of difficult laying of geotextile on the high-altitude arc-shaped cross-section of the outer arc surface of open-cut tunnels, low construction efficiency, and high safety risks.

[0039] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings.

[0040] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0041] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0042] Figure 1 This is a three-dimensional schematic diagram of the tunnel construction trolley provided in the embodiments of this utility model;

[0043] Figure 2 This is a front view of the tunnel construction trolley provided in this embodiment of the present invention when it is erected in a tunnel;

[0044] Figure 3 This is a partial view of the tunnel construction trolley provided in the embodiments of this utility model;

[0045] Figure 4 This is a top view of the laying trolley as it is positioned on the travel track, as provided in this embodiment of the utility model.

[0046] Figure 5 This is a front view of the laying trolley provided in an embodiment of this utility model;

[0047] Explanation of reference numerals in the attached figures:

[0048] 1. Laying trolley; 101. Frame; 102. Walking mechanism; 1021. Walking wheels; 1022. Fixing frame; 103. Fixing shaft; 104. Lateral rolling shaft; 105. Side rolling shaft; 2. Support frame; 201. Mounting slot; 202. Lateral fixing plate; 203. Side fixing plate; 3. Walking track; 4. Mounting shaft; 5. Drive assembly; 501. Forward and reverse motor; 502. Gear set; 6. Geotextile; 7. Nozzle; 8. Pipeline; 9. Tunnel; 10. Base. Detailed Implementation

[0049] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0050] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," "far," "near," "front," and "rear," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0051] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0052] The inventors discovered that during geotextile laying operations in tunnels, the limited external arc structure of open-cut tunnels often leaves workers without an effective support platform when working on the top or sides of the tunnel, posing significant challenges to on-site construction quality and operational safety. Currently, existing technologies include stepped arched working platforms to provide a platform for workers; however, under high-altitude conditions, geotextile laying remains primarily manual, often resulting in lower efficiency and quality, significantly impacting the seepage prevention quality of the subsequently formed tunnel. Furthermore, manual operation constantly poses personal safety risks, creating substantial challenges for on-site management.

[0053] To address the aforementioned issues, the inventors developed a tunnel construction trolley that enables automated geotextile laying, reducing the need for workers at heights and improving the efficiency and quality of geotextile laying. Example

[0054] See Figures 1-5This embodiment proposes a tunnel construction trolley, which includes a base 10, two parallel support frames 2, two laying trolleys 1, two travel tracks 3, a mounting shaft 4, and a drive assembly 5. The support frames 2 are mounted above the outer arc surface of the tunnel 9, and are arched in shape to match the shape of the tunnel 9. The two support frames 2 are connected to the base 10. Each support frame 2 is equipped with a travel track 3. The support frames 2 provide a stable support foundation for the entire construction trolley, while the travel tracks 3 provide a path for the movement of the laying trolleys 1. The two laying trolleys 1 are correspondingly arranged with the support frames 2, and each laying trolley 1 includes a frame 101, a traveling mechanism 102, and a fixed shaft 103. The upper end of the frame 101 (the end furthest from the outer arc surface of the tunnel 9) is provided with a traveling mechanism 102, which engages with the corresponding traveling track 3. The lower end of the frame 101 (the end closest to the outer arc surface of the tunnel 9) is provided with a horizontally extending fixed shaft 103. The mounting shaft 4 is detachably sleeved between the two fixed shafts 103. The outer surface of the mounting shaft 4 can be wrapped with geotextile 6, and the entire frame 101 is "suspended" above the tunnel 9. The drive assembly 5 is installed on at least one support frame 2 and is connected to the two traveling tracks 3 for transmission. It is used to drive the two traveling tracks 3 to reciprocate synchronously and drive the two frames 101 to reciprocate synchronously to realize the laying of geotextile 6. Of course, the construction trolley in this embodiment can also be used to lay other building materials, such as geogrids, non-woven fabrics, crack-resistant tapes, or waterproof boards, as long as they can be wrapped around the outer surface of the mounting shaft 4. It does not protect or limit the specific building materials. For ease of explanation, the following description uses the laying of geotextile 6 as an example.

[0055] When using, please refer to Figure 2 and Figure 5 ( Figure 5 (A front view of the two laying trolleys, with the central axis as the dividing line). The geotextile 6 to be laid is wound around the mounting shaft 4, and then the mounting shaft 4 is fitted between the fixed shafts 103 of the two laying trolleys 1. The drive assembly 5 is started, and the drive assembly 5 drives the two traveling tracks 3 to move synchronously back and forth. Since the traveling mechanism 102 is engaged with the traveling track 3, the movement of the traveling track 3 will cause the laying trolley 1 to move synchronously back and forth along the traveling track 3. As the laying trolley 1 moves, the mounting shaft 4 on the fixed shaft 103 also rotates, and the geotextile 6 wound on the outer surface of the mounting shaft 4 gradually unfolds, thereby realizing the laying of the geotextile 6 in the tunnel 9. In order to ensure that the geotextile 6 can be laid evenly and effectively, one end of the geotextile 6 can be pressed tightly to the construction ground during the laying process. Under the synergistic action of the drive assembly 5, the traveling track 3 and the laying trolley 1, the geotextile 6 is evenly laid on the outer arc surface of the tunnel 9.

[0056] In this embodiment, refer to Figure 5The mounting shaft 4 is detachably sleeved between two fixed shafts 103, and the outer surface of the mounting shaft 4 can be wrapped with geotextile 6. This allows the mounting shaft 4 to be easily replaced and adjusted according to actual construction needs, facilitating the laying of geotextile 6 with different widths and lengths, and demonstrating strong adaptability. Of course, for some geotextile 6 used on site, which is already wrapped around the outside of the roller, the roller can be sleeved on the outside of the mounting shaft 4, and the construction trolley of this embodiment can be used for laying.

[0057] In this embodiment, refer to Figure 2 and Figure 5 The drive component 5 can be connected to the two traveling tracks 3, thereby driving the two frames 101 to reciprocate synchronously. This ensures that the laying trolleys 1 on both sides can work in a coordinated manner when laying geotextile 6, avoiding problems such as uneven laying and wrinkles caused by asynchronous movement of the laying trolleys 1 on both sides, thus improving the quality and efficiency of geotextile 6 laying. It replaces the traditional method of workers performing dangerous manual laying operations on high-altitude scaffolding or simple platforms, significantly improving construction safety and effectively increasing work efficiency. It effectively solves the problems of difficult laying, low construction efficiency, and high safety risks of geotextile 6 on the high-altitude arc-shaped cross-section of the outer arc surface of open-cut tunnels. The operation process of the construction trolley in this implementation is simple, with low construction risk, and it can be applied to the construction of the outer arc arch of various types of open-cut tunnel linings.

[0058] Also see Figure 2 Since the entire paving trolley 1 is in reciprocating motion, the drive assembly 5 moves forward, pushing the two paving trolleys 1 along the travel track 3 from the starting point A ( Figure 2 The left end of the middle support frame 2 moves to the endpoint B. Figure 2 (From the right end of the middle support frame 2), a section of geotextile 6 is laid; after reaching point B, there is no need to manually or with an additional power mechanism to reset to the starting point A. Simply make the drive component 5 move in the opposite direction to drive the laying trolley 1 and geotextile 6 to return to the starting point A synchronously and at a constant speed, while laying the next section of geotextile 6. This cycle repeats, which not only eliminates the invalid reset time and shortens the operation time, but also enables continuous and efficient laying operations through reciprocating motion, significantly improving the laying speed and work efficiency.

[0059] In one specific embodiment, see [reference] Figure 5 The paving trolley 1 and the traveling track 3 can be engaged by a gear-rack system. Specifically, the traveling track 3 is a chain, and the traveling wheel 1021 is a sprocket that meshes with the chain. Power is transmitted between the sprocket and the chain through meshing, and there is no slippage between them. This ensures that the position and speed of the entire paving trolley 1 can accurately follow the movement of the traveling track 3. The transmission ratio is constant, and the transmission efficiency is high. This enables efficient and precise control of the movement of the entire paving trolley 1, thereby achieving efficient paving work.

[0060] In one specific embodiment, see [reference] Figure 4 The support frame 2 is provided with an installation groove 201, and the traveling track 3 is located in the installation groove 201. The installation groove 201 can position and limit the traveling track 3, providing a stable installation position for the traveling track 3. Furthermore, the installation groove 201 can limit the displacement of the traveling track 3 in the horizontal and vertical directions, ensuring the straightness and levelness of the traveling track 3, and preventing the traveling track 3 from deviating during operation. This ensures that the laying trolley 1 can move smoothly and accurately along the traveling track 3, improving the stability and reliability of the entire construction trolley operation.

[0061] In one specific embodiment, see [reference] Figure 4 and Figure 5 The mounting groove 201 has a transverse fixing plate 202 and a lateral fixing plate 203 on both sides. The transverse fixing plate 202 is located at the opening of the mounting groove 201, and the two ends of the lateral fixing plate 203 are respectively connected to the corresponding transverse fixing plate 202 and the outer wall of the mounting groove 201. The frame 101 has a transverse rolling shaft 104 and a lateral rolling shaft 105 rollingly connected to both sides. The transverse rolling shaft 104 abuts against the corresponding transverse fixing plate 202, and the lateral rolling shaft 105 abuts against the corresponding lateral fixing plate 203.

[0062] When the traveling track 3 moves the frame 101, the transverse rolling shaft 104 rolls on the surface of the corresponding transverse fixing plate 202, and the lateral rolling shaft 105 rolls on the corresponding lateral fixing plate 203. The transverse fixing plate 202 limits the frame 101 in the vertical direction, and the lateral fixing plate 203 limits the frame 101 in the horizontal direction. The transverse fixing plate 202 and the lateral fixing plate 203 limit the frame 101 in both vertical and horizontal directions, forming a stable support and constraint system. This greatly reduces the possibility of the frame 101 overturning and prevents the frame 101 from swaying or shifting during movement. It improves the stability of the frame 101's movement, thereby ensuring that the geotextile can be laid evenly and flatly on the outer arc surface of the tunnel according to the predetermined path and method, improving construction quality and reducing the possibility of rework later.

[0063] In one specific embodiment, see [reference] Figure 2 and Figure 3The drive assembly 5 includes a reversible motor 501 and a gear set 502. The output shaft of the reversible motor 501 is connected to the gear set 502, and the gear set 502 meshes with two traveling tracks 3. The reversible motor 501, as a power source, has forward and reverse rotation functions. It can be a DC motor, asynchronous motor, stepper motor, or servo motor, as is available in existing technologies, enabling the reciprocating motion of the entire laying trolley 1. This reciprocating motion achieves continuous and efficient laying operations, improving laying efficiency. The gear set 502 may include a main gear (not shown in the figure) and at least two driven gears (not shown in the figure). The main gear is connected to the output shaft of the reversible motor 501, and the two driven gears mesh with the main gear and the corresponding traveling track 3, respectively, to transmit the power of the reversible motor 501 from the main gear to the traveling track 3. The meshing transmission method of the gear set 502 has advantages such as high transmission efficiency, stable transmission ratio, and strong load-bearing capacity, ensuring that power is stably transmitted from the reversible motor 501 to the traveling track 3, guaranteeing the smoothness and reliability of the construction trolley's operation.

[0064] In one specific embodiment, see [reference] Figure 2 In this embodiment, the construction trolley also includes a control box (not shown in the figure) located at the bottom of any support frame 2, which is connected to the forward and reverse motor 501. Workers on the construction ground can conveniently control the forward and reverse motor 501 using the control box, achieving precise control of the movement of the laying trolley 1. This avoids workers performing high-altitude work on curved cross-sections, allowing workers to control the laying efficiency and quality of the geotextile 6 with a single button press from the ground, ensuring worker safety. Simultaneously, the control box can monitor the operating status of the forward and reverse motor 501 in real time, such as current, voltage, and speed. If any abnormality is detected, workers can take timely measures to prevent equipment damage and accidents, thereby ensuring construction safety and the quality of the geotextile 6 laying.

[0065] In one specific embodiment, see [reference] Figure 5 The traveling mechanism 102 includes traveling wheels 1021 and a fixed frame 1022. The fixed frame 1022 is connected to the upper end of the frame 101. The traveling wheels 1021 are connected to the fixed frame 1022 and engage with the corresponding traveling track 3. The fixed frame 1022 provides a foundation for the installation and support of the traveling wheels 1021, ensuring the stability of the traveling wheels 1021 during the movement of the frame 101, thereby ensuring the stability of the entire laying trolley 1 and effectively improving the laying quality of the geotextile 6.

[0066] In one specific embodiment, see [reference] Figure 2 and Figure 3In this embodiment, the construction trolley is also equipped with nozzles 7, pipelines 8, and a power unit (not shown in the figure). The nozzles 7 are spaced apart on the side of the support frame 2 facing the tunnel 9. The pipelines 8 are installed on the support frame 2 and connected to the nozzles 7. The power unit is connected to the pipelines 8 to deliver external water to them. Here, the power unit can be a water pump, booster pump, or other equipment found in the prior art. The external water source can be stored in a water tank (not shown in the figure). The inlet of the water tank is connected to the power unit, and a check valve (not shown in the figure) and a flow meter (not shown in the figure) can be connected to the outlet of the water tank. Based on intelligent flow sensing and control technology, an automated spraying flow control module is implemented, enabling controllable spraying volume at each point, continuous spraying effect, and immediate start / stop.

[0067] During the laying of geotextile 6, nozzles 7 can be used for simultaneous spraying to moisten the surface of geotextile 6. Moistened geotextile 6 adheres better to the tunnel wall 9, improving the laying quality and stability. Before laying geotextile 6, nozzles 7 can be used to evenly spray water onto the outer arc surface of tunnel 9 for curing. This eliminates the need for other watering devices or manual watering, enabling the construction trolley to function multifunctionally, reducing the time spent installing other watering devices, effectively shortening curing time, and avoiding manual watering, thus automating curing and ensuring worker safety. Simultaneously, the even spraying achieved by the spaced nozzles 7 improves the curing quality of the outer arc lining of tunnel 9.

[0068] For example, during construction, the cast-in-place tunnel lining structure is divided into multiple segments of fixed length, and each segment is numbered. The design can be based on each segment being 9 meters long. Before movement, the segment number and its corresponding absolute coordinates are input into the control system. Then, the precise location corresponding to the plate number is marked on the ground in advance using spraying or other methods to distinguish the front and rear movements of the construction trolley.

[0069] First, the control system is used to autonomously move the construction trolley to the corresponding construction area. Spraying water on the outer arc surface of the tunnel lining is carried out using nozzles. The water spraying operation is mainly carried out along the tunnel axis. The water spraying operation is started when the construction trolley moves forward. As the construction trolley moves forward evenly, water is sprayed evenly. The water spraying operation is stopped when the construction trolley reaches the end of the segment. Considering the influence of seasonal climate, the water spraying operation may be a repetitive process. Therefore, it needs to be carried out according to the actual site conditions. If necessary, the trolley can spray water back and forth within a single segment.

[0070] After the tunnel's outer arc surface is water-cured, geotextile laying is required. Powered by a reversible motor, the chain on the support frame (i.e., the aforementioned travel track) rotates in a circular motion, similar to a bicycle chain, securing the geotextile to the arch foot. The chain drives the laying trolley along the tunnel's outer arc surface to lay the geotextile. Considering the limitations on geotextile width, after each segment is laid, the construction trolley is advanced to 90%–95% of the geotextile width, and the laying process is repeated to ensure an overlap of 5%–10% of the geotextile width per ring, thus ensuring effective leakage control on the tunnel lining's outer arc surface.

[0071] Finally, after the geotextile is laid, a concrete protective layer is constructed according to the design requirements. Then, backfilling is carried out according to the design requirements by selecting suitable soil materials, appropriate moisture content and gradation requirements, and compaction is carried out according to the compaction equipment, number of compaction passes and compaction degree required by the design.

[0072] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. This disclosure is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims. Thus, if these modifications and variations of this utility model fall within the scope of the claims of this utility model and their equivalents, this utility model is also intended to include these modifications and variations.

Claims

1. A tunneling jumbo, characterized in that include: The system includes a base, two parallel support frames, two laying trolleys, two travel tracks, mounting shafts, and drive components. The two support frames are connected to the base; Both of the aforementioned support frames are equipped with one of the aforementioned travel tracks; The two laying trolleys are correspondingly arranged with the support frame; Each of the laying trolleys includes a frame, a traveling mechanism, and a fixed axle; The traveling mechanism is located at the upper end of the vehicle frame and engages with the corresponding traveling track; The lower end of the frame is provided with the horizontally extending fixed shaft; The mounting shaft is detachably sleeved between the two fixed shafts, and the outer surface of the mounting shaft can be wrapped with geotextile. The drive assembly is mounted on at least one of the support frames and is connected to the two travel tracks for synchronous reciprocating motion, and drives the two vehicle frames to reciprocate synchronously to lay the geotextile.

2. The tunneling trolley of claim 1, wherein, The support frame is provided with a mounting groove; The travel track is located in the mounting slot.

3. The tunneling trolley of claim 2, wherein, Both sides of the mounting groove are provided with a horizontal fixing plate and a lateral fixing plate; The horizontal fixing plate is located at the opening of the mounting groove; The two ends of the lateral fixing plate are respectively connected to the corresponding transverse fixing plate and the outer side wall of the mounting groove; Both sides of the frame are connected by a transverse rolling shaft and a lateral rolling shaft. The transverse rolling shaft abuts against the corresponding transverse fixing plate; The lateral rolling shaft abuts against the corresponding lateral fixing plate.

4. The tunneling trolley of claim 1, wherein, The drive assembly includes a forward and reverse rotating motor and a gear set; The output shaft of the reversible motor is connected to the gear set; The gear set meshes with the two travel tracks.

5. The tunneling trolley of claim 4, wherein, It also includes a control box located at the bottom of any of the aforementioned support frames; The control box is connected to the forward and reverse motor.

6. The tunneling trolley of claim 1, wherein, The walking mechanism includes walking wheels and a fixed frame; The mounting bracket is connected to the upper end of the vehicle frame; The traveling wheel is connected to the fixed frame and engages with the corresponding traveling track.

7. The tunneling trolley of claim 6, wherein, The walking track is a toothed chain; The traveling wheel is a sprocket that meshes with the toothed chain.

8. The tunneling trolley of any one of claims 1-7, wherein, It also includes nozzles, piping, and power units; The nozzles are spaced apart on the side of the support frame facing the tunnel; The pipeline is installed on the support frame and is connected to the nozzle; The power unit is connected to the pipeline and is used to transport external water to the pipeline.

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