Tunnel trolley with positioning mark function

Abstract

The utility model discloses a tunnel trolley with positioning mark function, including trolley body, and the laser transmitter of fixed on trolley body a plurality, each laser transmitter can project mark light rays to the direction of tunnel inner wall, and the projection path of each mark light rays passes through the preset position of hot melt gasket, or passes through the preset position of transverse steel bar. Through mark light rays replace artificial ruler and instrument measurement and mark, on one hand, the cumbersome operation of construction worker point -by -point measurement, marking is saved, and the worker only needs to "see light operation", and the time and manpower consumption in the positioning process of hot melt gasket and transverse steel bar are reduced greatly, the low -efficiency problem of numerous components in prior art leads to the solution, on the other hand, laser light has very high projection accuracy, can effectively avoid the cumulative error of artificial ruler and instrument measurement, and the mark result is not influenced by construction worker, and positioning mark's accuracy is improved significantly, and then can guarantee waterproof board laying quality and steel bar cage structure performance.

Description

Technical Field

[0001] This utility model mainly relates to the field of tunnel construction equipment technology, and in particular to tunnel trolleys. Background Technology

[0002] The tunnel construction process includes two steps: waterproofing membrane construction and secondary lining construction.

[0003] During the construction of waterproof membranes, hot-melt gaskets are required on the inner wall of the initial support to secure the membrane and achieve a nail-free installation. Strictly controlling the spacing of these hot-melt gaskets is crucial for ensuring the reliability, structural stability, and economic efficiency of the tunnel waterproofing system. As the anchor points between the waterproof membrane and the inner wall of the initial support, the spacing of the hot-melt gaskets directly determines the laying quality, stress state, and waterproofing effectiveness of the membrane. In existing technologies, construction workers typically use measuring tools to measure and mark the pre-set positions of the hot-melt gaskets on the inner wall of the initial support before fixing them according to the marked points.

[0004] Secondary lining construction includes the on-site fabrication of reinforcing cages, which involves binding circumferential and transverse reinforcing bars inside the tunnel to form an arched reinforcing cage that conforms to the shape of the tunnel wall. When using existing tunnel reinforcing cage construction equipment (such as the technical solution disclosed in Chinese patent document CN115163139A, entitled "Tunnel Reinforcing Cage Construction Equipment and Tunnel Reinforcing Cage Construction Method") for reinforcing cage construction, the circumferential reinforcing bars are first arranged along the tunnel length direction on one side of the tunnel road surface. Then, a reinforcing bar pulling device is used to pull one end of the circumferential reinforcing bar, causing it to move along the tunnel circumferentially with the device, thereby positioning the circumferential reinforcing bar in the tunnel circumferential direction. Afterward, the transverse reinforcing bars are fixed to the circumferential reinforcing bars to form a complete arched reinforcing cage.

[0005] Transverse reinforcement bars are crucial load-bearing and structural components of the tunnel secondary lining reinforcement cage. Their spacing directly affects the cage's mechanical properties, construction quality, and ultimate structural safety. Transverse reinforcement bars provide lateral support to the circumferential reinforcement bars, preventing instability due to insufficient restraint during stress or concrete pouring. If the spacing is too large, the circumferential reinforcement bars will lack sufficient support, leading to localized deformation; if the spacing is too small, it will waste reinforcement and affect the compaction of the concrete during pouring. Furthermore, the transverse reinforcement bars themselves bear some horizontal shear and tensile forces; uniform spacing is essential for ensuring even load distribution throughout the entire cage. Therefore, the spacing of the transverse reinforcement bars must be strictly controlled during reinforcement construction. In existing technologies, construction workers typically use measuring tools to measure and mark the binding positions of the transverse reinforcement bars on the circumferential reinforcement bars before binding them according to the marked points.

[0006] Both the installation of hot-melt gaskets and the installation of transverse reinforcing bars involve three steps: "measurement, marking, and binding," all of which are entirely done manually. This method has two drawbacks. First, due to the large number of hot-melt gaskets and transverse reinforcing bars, the measurement and marking steps consume a significant amount of time and manpower. Second, the accuracy of measurements using measuring tools is relatively low, prone to cumulative errors, and highly dependent on the skill and responsibility of the construction workers, often resulting in significant deviations during actual construction.

[0007] Therefore, it is necessary to modify the tunnel trolley to enable it to locate and mark the hot-melt pads and / or the transverse reinforcement bars of the secondary lining, thereby improving construction efficiency and reducing manpower requirements. Utility Model Content

[0008] The technical problem to be solved by this utility model is how to use a tunnel trolley to position and mark the hot melt pads and / or the transverse reinforcement bars of the secondary lining, thereby improving construction efficiency and reducing manpower requirements.

[0009] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A tunnel trolley with positioning and marking function includes a trolley body and several laser emitters fixed on the trolley body. Each laser emitter can project marking light towards the inner wall of the tunnel, and the projection path of each marking light passes through a preset position of the hot-melt pad or a preset position of the transverse reinforcement. By using laser emitters to project marking light to replace manual measurement and marking, on the one hand, it eliminates the tedious operation of construction workers measuring and marking point by point. Workers only need to "work by light," which greatly reduces the time and manpower consumption in the positioning process of the hot-melt pad and transverse reinforcement, and solves the problem of low efficiency caused by the large number of components in the existing technology. On the other hand, the laser light has extremely high projection accuracy, which can effectively avoid the cumulative error caused by manual measurement, and the marking results are not affected by construction workers, which significantly improves the accuracy of positioning and marking, thereby ensuring the quality of waterproof membrane laying and the structural performance of the reinforcement cage.

[0010] The trolley body includes a support frame, a pair of arc-shaped tracks fixed to the outside of the support frame, and a rebar pulling device mounted on the arc-shaped tracks to drive the circumferential rebars from a length-along-tunnel-direction arrangement to a circumferential-along-tunnel arrangement. The design of the support frame and arc-shaped tracks allows the trolley body to stably support the rebar pulling device, ensuring smooth movement and accurate positioning of the circumferential rebars during the pulling process. By incorporating the rebar pulling device, the circumferential rebar arrangement process is automated, reducing manual intervention and improving construction speed and consistency.

[0011] The arc-shaped track has grooves on both its inner and outer sides, which are adapted to the wheels in the rebar pulling device. The precise fit between the inner and outer track grooves and the wheels of the rebar pulling device limits the movement of the wheels within the grooves, ensuring the stability and smoothness of the rebar pulling device as it runs along the arc-shaped track.

[0012] At least one of the aforementioned arc-shaped tracks has a mounting base fixed to its inner side. The mounting base is located below the track groove, and several laser emitters are spaced apart on the mounting base along the length of the arc-shaped track. The mounting base's placement inside the arc-shaped track and below the track groove avoids the running path of the rebar pulling device's wheels within the track groove and prevents interference with other structures of the trolley body. This ensures that the original function of the rebar pulling device is not affected by the positioning marker structure and that the light projected by the laser emitters is not obstructed. Simultaneously, the laser emitters are arranged along the length of the arc-shaped track, conforming to the arched contour of the tunnel wall, allowing the marking light to be accurately projected onto the preset positions of the hot-melt pads or transverse rebars distributed circumferentially along the tunnel.

[0013] The number of laser emitters is equal to the number of rows of hot-melt gaskets. By setting the number of laser emitters equal to the number of rows of hot-melt gaskets, marking light can be provided to all rows of hot-melt gaskets simultaneously, achieving one-time comprehensive positioning and greatly improving the efficiency of waterproof membrane construction. At the same time, setting the number of laser emitters equal to the number of rows of hot-melt gaskets means that each laser emitter only needs to provide marking light to one row of hot-melt gaskets, thereby reducing the difficulty of adjusting the laser emitters and making implementation easier.

[0014] The inner and outer transverse reinforcing bars of the secondary lining cage correspond one-to-one, and the number of laser emitters is equal to the number of transverse reinforcing bars in a single layer. By setting the number of laser emitters equal to the number of transverse reinforcing bars in a single layer, marking rays can be provided for all transverse reinforcing bars in the same layer simultaneously, achieving one-time comprehensive positioning and greatly improving the efficiency of transverse reinforcing bar construction. At the same time, setting the number of laser emitters equal to the number of transverse reinforcing bars in a single layer means that each laser emitter only needs to provide marking rays for one transverse reinforcing bar in a single layer, thus reducing the difficulty of adjusting the laser emitters and making implementation easier. Furthermore, because the inner and outer transverse reinforcing bars of the secondary lining cage correspond one-to-one, it means that the number of inner and outer transverse reinforcing bars is equal, meaning that the number of laser emitters equal to the number of transverse reinforcing bars in a single layer can provide marking rays for both layers of transverse reinforcing bars, thereby halving the number of lasers and reducing manufacturing, procurement, and maintenance costs.

[0015] The inner and outer transverse reinforcing bars of the secondary lining cage correspond one-to-one. The projection path of the marking light emitted by the laser emitter simultaneously passes through the preset positions of both the inner and outer transverse reinforcing bars. The marking light simultaneously covers the preset positions of both layers of reinforcing bars, achieving synchronous positioning of the two layers. During construction, workers first tie the outer transverse reinforcing bars, then tie the inner transverse reinforcing bars. This sequence avoids the inner transverse reinforcing bars obstructing the light spot used for positioning the outer transverse reinforcing bars. With this setup, there is no need to readjust the laser emitter when tying the inner and outer transverse reinforcing bars, simplifying the construction process and improving tying efficiency.

[0016] The laser emitters are evenly arranged on the mounting base. The hot-melt pads and transverse reinforcing bars are also evenly arranged. This even distribution of the laser emitters on the mounting base facilitates adjustment.

[0017] The laser emitter and mounting base are detachably connected. This detachable connection makes the laser emitter easy to install, replace, or maintain, improving the equipment's flexibility and lifespan. Construction personnel can quickly adjust the number and position of the laser emitters according to different tunnel sizes or design requirements, adapting to various construction scenarios. Attached Figure Description

[0018] Figure 1 This is a structural schematic diagram of the tunnel trolley; Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle; Figure 3 This is a schematic diagram of the tunnel trolley projected inside the tunnel.

[0019] The labels in the diagram represent: 1. Trolley body; 11. Support frame; 12. Arc track; 121. Track groove; 122. Mounting seat; 13. Rebar pulling device; 131. Wheel; 2. Laser emitter. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Example 1 like Figures 1 to 3 As shown, the tunnel trolley with positioning and marking function consists of a trolley body 1 and several laser emitters 2. The laser emitters 2 are detachably fixed to the trolley body 1 and all project high-brightness, low-divergence marking rays toward the inner wall of the tunnel. The spatial projection path of each marking ray precisely passes through the preset installation coordinates of the hot melt pad or transverse steel bar, achieving the effect of laser layout.

[0022] In this embodiment, the trolley body 1 includes a support frame 11—providing a rigid foundation for the entire trolley; a pair of arc-shaped tracks 12 symmetrically arranged at both ends of the support frame 11 along the tunnel length direction—welded to the support frame 11 as a whole, with their curvature concentric with the inner contour of the tunnel design; and a steel bar pulling device 13 spanning the arc-shaped tracks 12—this device can pull and twist the circumferential steel bars stacked along the tunnel longitudinal direction to the circumferential design position, completing the circumferential forming of the steel bar cage.

[0023] Furthermore, a track groove 121 is provided on each of the inner and outer sides of the arc track 12. The track groove 121 is precisely matched with the flange of the wheel 131 of the steel bar pulling device 13, which not only ensures the walking accuracy but also serves as a fall prevention constraint.

[0024] At least one of the arc-shaped tracks 12 has an arc-shaped mounting base 122 welded to its inner lower side; the curvature of the mounting base 122 is consistent with that of the arc-shaped track 12, and its rigidity is sufficient to suppress laser deflection caused by vibration. The laser emitter 2 is detachably connected to the mounting base 122 by means of a clamp. It should be noted that the laser emitter 2 is a commercially available product, and its structure and working principle will not be described in detail here. Furthermore, the laser emitter 2 has an adjustment function; through its own adjustment structure, the direction of the transmitted light can be modified as needed.

[0025] In this embodiment, the number of laser emitters 2 is equal to the number of rows of circumferential hot-melt pads in the tunnel, ensuring that a beam of light passes through the center of each row of hot-melt pads. It should be noted that a row of hot-melt pads refers to a group of hot-melt pads arranged along the length of the tunnel. When the light is projected onto the inner wall of the tunnel, each beam is parallel and equally spaced. By fixing the hot-melt pads according to the position of the light beams, the consistent spacing of the hot-melt pads along the circumferential direction of the tunnel can be ensured.

[0026] Meanwhile, all laser emitters 2 are evenly arranged on the mounting base 122 for easy adjustment. By setting up the above structure, the tunnel trolley can complete the lateral marking of all hot melt gaskets in one go, without the need for additional manual layout, which significantly improves construction efficiency and reduces cumulative errors.

[0027] Example 2 In this embodiment, the tunnel trolley with positioning marking function differs from that in Embodiment 1 in that: the inner and outer transverse steel bars correspond one-to-one, the number of laser emitters 2 is equal to the number of single-layer transverse steel bars, and the same beam of marking light passes through the corresponding inner and outer transverse steel bars at the same time, realizing the alignment of the double-layer steel bars in one go.

[0028] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make many possible variations and modifications to the present invention, or modify it into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, should fall within the protection scope of the present invention.

Claims

1. A tunnel trolley with positioning and marking function, characterized in that: It includes a trolley body (1) and a plurality of laser emitters (2) fixed on the trolley body (1); each of the laser emitters (2) can project marking light toward the inner wall of the tunnel, and the projection path of each marking light passes through a preset position of the hot melt pad or a preset position of the transverse steel bar.

2. The tunnel trolley with positioning marking function according to claim 1, characterized in that: The trolley body (1) includes a support frame (11), a pair of arc-shaped rails (12) fixed on the outside of the support frame (11), and a steel bar pulling device (13) set on the arc-shaped rails (12) for driving the circumferential steel bars to change from being arranged along the tunnel length direction to being arranged along the tunnel circumferential direction.

3. The tunnel trolley with positioning marking function according to claim 2, characterized in that: The arc-shaped track (12) has track grooves (121) on both the inner and outer sides, and the track grooves (121) are adapted to the wheels (131) in the steel bar pulling device (13).

4. The tunnel trolley with positioning marking function according to claim 3, characterized in that: At least one of the arc-shaped tracks (12) has a mounting base (122) fixed on its inner side. The mounting base (122) is located below the track groove (121), and a plurality of laser emitters (2) are installed on the mounting base (122) at intervals along the length direction of the arc-shaped track (12).

5. The tunnel trolley with positioning marking function according to claim 4, characterized in that: The number of laser emitters (2) is equal to the number of rows of hot melt pads.

6. The tunnel trolley with positioning marking function according to claim 4, characterized in that: The inner transverse steel bars of the secondary lining cage correspond one-to-one with the outer transverse steel bars, and the number of laser emitters (2) is equal to the number of single-layer transverse steel bars.

7. The tunnel trolley with positioning marking function according to claim 4, characterized in that: The inner transverse steel bars of the secondary lining cage correspond one-to-one with the outer transverse steel bars. The projection path of the marker light projected by the laser emitter (2) passes through the preset positions of the inner transverse steel bars and the outer transverse steel bars.

8. The tunnel trolley with positioning marking function according to any one of claims 4-7, characterized in that: The laser emitters (2) are evenly arranged on the mounting base (122).

9. The tunnel trolley with positioning marking function according to any one of claims 4-7, characterized in that: The laser emitter (2) and the mounting base (122) are configured to be detachably connected.

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