A construction tool for deep-buried central water ditch splitting method in high-altitude and cold-climate tunnels

Abstract

This utility model relates to the field of tunnel construction technology, specifically to a construction tool for splitting a deep-buried central drainage ditch in high-altitude and cold-climate tunnels. It includes a U-shaped traveling frame that can move relative to a self-propelled arch bridge. The self-propelled arch bridge has a track. The U-shaped traveling frame includes two vertical supports, a transverse connecting beam connecting the two vertical supports, and traveling wheels. A drive unit mounting box is located below the transverse connecting beam. An installation frame is installed below the U-shaped traveling frame via a suspension connection mechanism. The installation frame includes a first installation frame and a second installation frame arranged side-by-side and fixedly connected. The first installation frame contains several first hydraulic core drills and several second hydraulic core drills. The second installation frame contains several splitting rods. The first hydraulic core drills, second hydraulic core drills, and splitting rods are vertically and flexibly mounted on the installation frames. This utility model solves the problems of drainage ditch position deviation, non-straight alignment, and uncontrolled ditch bottom elevation caused by existing blasting excavator methods.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction technology, specifically a construction tool for the deep-buried central water ditch splitting method in high-altitude and cold-climate tunnels. Background Technology

[0002] In the construction of tunnels in high-altitude and cold regions, deeply buried central drainage ditches are a crucial structure for ensuring the tunnel's drainage system. Currently, in hard rock sections, these ditches are mainly excavated using a combination of blasting and excavation. This method has significant drawbacks: First, the center position and alignment of the ditches are difficult to control. Due to the influence of the excavator operator's line of sight and operating habits, the excavated trenches tend to deviate from the center of the invert arch, resulting in a curved alignment and causing the ditch to be misaligned, with uneven thickness of the filter layer on both sides, affecting its filtration performance. Second, controlling the bottom elevation of the ditches is difficult. The combination of blasting and excavation can easily cause unevenness at the bottom, increasing the amount of concrete used for the bottom paving and leading to increased costs. In addition, blasting causes significant disturbance to the surrounding rock, and the blasting range is difficult to control precisely, often resulting in over-excavation or under-excavation, affecting the overall stability and safety of the tunnel. Therefore, there is an urgent need for specialized construction equipment that can achieve precise positioning, straight alignment, and regular contours of the drainage ditches while minimizing disturbance to the surrounding rock. Utility Model Content

[0003] The purpose of this invention is to provide a construction tool for the deep-buried central water ditch splitting method in high-altitude and cold-climate tunnels, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a construction tool for the deep-buried central water ditch splitting method in high-altitude and cold-climate tunnels, comprising a U-shaped traveling frame movable relative to a self-propelled arch bridge, the self-propelled arch bridge being equipped with a track, the U-shaped traveling frame comprising two vertical supports, a transverse connecting beam connecting the two vertical supports, and traveling wheels, the U-shaped traveling frame moving on the track via the traveling wheels; a drive device mounting box is provided below the transverse connecting beam, the drive device mounting box containing a motor and an intelligent control system; an installation frame is installed below the U-shaped traveling frame via a suspension connection mechanism, the installation frame comprising a first installation frame and a second installation frame arranged side by side and fixedly connected; the first installation frame contains a plurality of first hydraulic core extractors and a plurality of second hydraulic core extractors, the second installation frame contains a plurality of splitting rods; the first hydraulic core extractors, the second hydraulic core extractors, and the splitting rods are movably mounted on the installation frames.

[0005] Preferably, the suspension connection mechanism includes two channel steels and a crossbar. The two channel steels are fixedly mounted on the transverse connecting beam, and the crossbar passes through the first mounting frame and the second mounting frame. Both ends of the crossbar are connected to the channel steels respectively.

[0006] Preferably, the crossbar is provided with a limiting device to restrict the lateral displacement of the mounting frame. The limiting device includes two reinforcing iron plates arranged vertically and detachably connected, and high-strength bolts connecting the two reinforcing iron plates to the crossbar.

[0007] Preferably, the second hydraulic core extractor is symmetrically arranged on both sides of the first hydraulic core extractor, and the diameter of the first hydraulic core extractor is larger than the diameter of the second hydraulic core extractor.

[0008] Preferably, the splitting rods are symmetrically arranged on both sides within the second mounting frame, with the middle of the second mounting frame being an empty area, and the diameter of the splitting rods is 90-110mm.

[0009] Preferably, the bottom of the first mounting frame is provided with a first through hole for the first hydraulic core extractor to pass through and a second through hole for the second hydraulic core extractor to pass through, and the bottom of the second mounting frame is provided with a third through hole for the splitting rod to pass through.

[0010] Preferably, the first hydraulic core extractor has a first threaded steel bar inside, and the second hydraulic core extractor has a second threaded steel bar inside. The upper ends of both the first and second threaded steel bars are fixedly connected to the top of the first mounting frame. The inner wall of the first hydraulic core extractor has an internal thread that mates with the external thread of the first threaded steel bar, and the inner wall of the second hydraulic core extractor has an internal thread that mates with the external thread of the second threaded steel bar. The motor is electrically connected to the first and second hydraulic core extractors.

[0011] Preferably, the splitting rod has a third threaded steel rod inside, the upper end of the third threaded steel rod is fixedly connected to the top of the second mounting frame, the inner wall of the splitting rod has an internal thread that matches the external thread of the third threaded steel rod, and the motor is electrically connected to the splitting rod.

[0012] Compared with existing technologies, this utility model provides a construction tool for the deep-buried central drainage ditch splitting method in high-altitude and cold-climate tunnels, which has the following beneficial effects: By moving along the track of a self-propelled arch bridge using a U-shaped walking frame, combined with the precise control of the hydraulic core drill and splitting rod's descent height by an intelligent control system, the center position, alignment, and bottom elevation of the deep-buried drainage ditch strictly meet the design requirements, ensuring that the ditch is always buried in the center of the encasing concrete and graded crushed stone filter layer, effectively guaranteeing drainage function; the use of splitting rods instead of traditional blasting significantly reduces disturbance to the surrounding rock, avoids over- and under-excavation, reduces concrete waste, and saves costs; the tool has a reasonable structure and intelligent operation, making construction in hard rock strata faster and more efficient, while also possessing advantages such as economy, environmental protection, and ease of promotion, thus improving the overall quality and efficiency of tunnel construction. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 This is a side view of the present invention; Figure 4 This is a top view of the first mounting frame of this utility model; Figure 5 for Figure 4 Sectional view of AA; Figure 6 for Figure 4 Sectional view of BB; Figure 7 This is a top view of the second mounting frame of this utility model; Figure 8 for Figure 7 Sectional view of CC; Figure 9 for Figure 1 Enlarged view of the limiting device at point B; Figure 10 This is a side view of the limiting device of this utility model.

[0014] Explanation of reference numerals in the attached drawings: 1. Self-propelled arch bridge; 11. Track; 2. U-shaped walking frame; 21. Vertical support; 22. Transverse connecting beam; 23. Walking wheel; 3. Drive unit mounting box; 31. Motor; 4. Suspension connection mechanism; 41. Channel steel; 42. Crossbar; 5. Mounting frame; 51. First mounting frame; 511. First hydraulic core extractor; 512. Second hydraulic core extractor; 513. First through hole; 514. Second through hole; 515. Third through hole; 52. Second mounting frame; 521. Splitting rod; 6. Limiting device; 61. Reinforcing iron plate; 62. High-strength bolt; 7. First threaded steel bar; 8. Second threaded steel bar; 9. Third threaded steel bar. Detailed Implementation

[0015] The technical solutions of the present utility model will now be described with reference to the accompanying drawings in the embodiments of the present utility model: like Figures 1-10 As shown, this utility model provides a construction tooling for the deep-buried central drainage ditch splitting method in high-altitude and cold-climate tunnels, including a U-shaped traveling frame 2 that can move relative to a self-propelled inverted arch trestle 1. A track 11 is provided on the self-propelled inverted arch trestle 1 to guide the U-shaped traveling frame 2 to move longitudinally along the tunnel. The U-shaped traveling frame 2 is an integral load-bearing structure, including two vertical supports 21, a transverse connecting beam 22 connecting the two vertical supports 21, and traveling wheels 23. Each vertical support 21 is equipped with a traveling wheel 23 at its upper part, ensuring the structural stability of the entire tooling during movement. The U-shaped traveling frame 2 moves on the track 11 via the traveling wheels 23.

[0016] A drive unit mounting box 3 is installed below the transverse connecting beam 22. The drive unit mounting box 3 has a length of 1800-2200mm, a width of 500-700mm, and a height of 700-900mm, with a preferred size of 2000mm in length, 600mm in width, and 800mm in height. The drive unit mounting box 3 contains a motor 31 and an intelligent control system. The motor 31 provides rotational power for the lifting and lowering of the hydraulic coring machine and the splitting rod. The intelligent control system receives construction mileage information and, based on pre-stored ditch design data (such as dimensions, ditch bottom elevation, and slope), automatically calculates and controls the drilling depth of the hydraulic coring machine and the working position of the splitting rod.

[0017] A mounting frame 5 is installed below the U-shaped walking frame 2 via a suspension connection mechanism 4. The mounting frame 5 includes a first mounting frame 51 and a second mounting frame 52 arranged side-by-side and fixedly connected. The first mounting frame 51 has a length L1 (2200-2400mm), a width L2 (1900-2100mm), and a height L3 (700-900mm), preferably 2300mm long, 2000mm wide, and 800mm high. The dimensions of the first mounting frame 51 are the same as those of the second mounting frame 52. Both the first and second mounting frames 51 are made of welded steel plates, with a 200mm thick steel plate at the top and 20mm thick steel plates on the sides and bottom. Corresponding through holes are provided at the bottom for the hydraulic core extractor and splitting rod. The first mounting frame 51 contains several first hydraulic core extractors 511 and several second hydraulic core extractors 512. The second hydraulic core drill 512 is symmetrically arranged on both sides of the first hydraulic core drill 511, and the diameter of the first hydraulic core drill 511 is larger than the diameter of the second hydraulic core drill 512. The diameter of the first hydraulic core drill 511 is D1, which is 280-320mm, preferably 300mm, and is used to drill large-diameter core samples in the rock strata to form the free surface required for splitting. The diameter of the second hydraulic core drill 512 is D2, which is 90-110mm, preferably 100mm, and is used to drill small-diameter holes to provide space for the installation of splitting rods. The bottom of the first mounting frame 51 has a first through hole 513 for the first hydraulic core drill 511 to pass through and a second through hole 514 for the second hydraulic core drill 512 to pass through. The second mounting frame 52 contains a plurality of splitting rods 521, the diameter of which is D3, which is 90-110mm, preferably 100mm. Splitting rods 521 are symmetrically arranged on both sides within the second mounting frame 52, with the middle section of the second mounting frame 52 being an empty area. A third through hole 515 is provided at the bottom of the second mounting frame 52 for the splitting rods 521 to pass through. The first hydraulic core extractor 511, the second hydraulic core extractor 512, and the splitting rods 521 are vertically and flexibly mounted on the mounting frame 5. The mounting frame 5 also contains a hydraulic drive device, which powers all three components, enabling efficient drilling and splitting operations.

[0018] The suspension connection mechanism 4 includes two channel steels 41 and a crossbar 42. The two channel steels 41 are fixedly mounted on the transverse connecting beam 22. The crossbar 42 passes through the first mounting frame 51 and the second mounting frame 52, and its two ends are connected to the channel steels 41 respectively to ensure the suspension stability of the mounting frame 5. The connection between the two ends of the crossbar 42 and the channel steels 41 is achieved by a heat fitting process to achieve an interference fit. Specifically, during assembly, the channel steel 41 with the mounting holes is first locally heated, causing the mounting holes to expand and increase in diameter; at the same time, the two ends of the crossbar 42 are cooled at low temperature, causing its shaft diameter to shrink. Then, the cooled ends of the crossbar 42 are quickly and accurately aligned and inserted into the heated and expanded mounting holes of the channel steel 41. After the components return to ambient temperature, the diameter of the channel steel 41 shrinks, and the shaft diameter of the crossbar 42 expands, generating a huge clamping force at the contact surface, thereby achieving a firm and highly coaxial interference fit connection between the two.

[0019] The crossbar 42 is equipped with a limiting device 6 to restrict the lateral displacement of the mounting frame 5. The limiting device 6 includes two vertically arranged and detachably connected reinforcing iron plates 61 and a high-strength bolt 62 connecting the two reinforcing iron plates 61 to the crossbar 42. The crossbar 42 has mounting holes. After the high-strength bolt 62 passes through the reinforcing iron plates 61 and the mounting holes, it tightens the upper and lower reinforcing iron plates 61, thereby clamping the mounting frame 5 and preventing the mounting frame 5 from lateral swaying during construction.

[0020] The first hydraulic core extractor 511 contains a first threaded steel rod 7, and the second hydraulic core extractor 512 contains a second threaded steel rod 8. The upper ends of both the first threaded steel rod 7 and the second threaded steel rod 8 are fixedly connected to the top of the first mounting frame 51. The inner wall of the first hydraulic core extractor 511 has an internal thread that mates with the external thread of the first threaded steel rod 7, and the inner wall of the second hydraulic core extractor 512 has an internal thread that mates with the external thread of the second threaded steel rod 8. A motor 31 is electrically connected to both the first and second hydraulic core extractors 511 and 512, driving them to rotate and thus raising and lowering along the first threaded steel rod 7 and the second threaded steel rod 8. The descent height is automatically calculated and controlled by an intelligent control system based on a preset algorithm.

[0021] The splitting rod 521 has a third threaded steel rod 9 inside, and the upper end of the third threaded steel rod 9 is fixedly connected to the top of the second mounting frame 52. The inner wall of the splitting rod 521 has an internal thread that mates with the external thread of the third threaded steel rod 9. The motor 31 is electrically connected to the splitting rod 521, and the motor 31 drives the splitting rod 521 to rotate, realizing the lifting and lowering along the third threaded steel rod 9. The descent height is automatically calculated and controlled by the intelligent control system according to a preset algorithm.

[0022] Before construction, the intelligent control system pre-enters data on the dimensions, bottom elevation, and slope of the entire tunnel's buried drainage ditch. During construction, operators input the current construction mileage via a handheld control terminal, and the system automatically calculates the drop height of each hydraulic core drill and splitter according to a preset algorithm. The calculation formula is H=(Aa)-(B+L×i×X / L)=Aa-(B+i×X), where H is the drop height of the corresponding hydraulic core drill or splitter (meters), A is the bottom elevation of the corresponding hydraulic core drill or splitter when it is currently positioned (meters), a is the height of the invert excavation line corresponding to the corresponding hydraulic core drill or splitter when it is currently in place (meters), B is the bottom depth of the corresponding hydraulic core drill or splitter at the specific location of the buried drainage ditch cross-section (meters), L is the current tunnel length (meters), i is the current tunnel slope (e.g., 3‰), and X is the current tunnel mileage (meters) of the corresponding hydraulic core drill or splitter. Based on the calculation results, the system controls the motor to drive each hydraulic core extractor and splitting rod to rotate, so that they are lowered to the predetermined height, ensuring that the excavation profile and depth fully meet the design requirements.

[0023] During construction, this tooling shall be operated according to the following steps: S1: Excavation and shaping of the inverted arch curvature.

[0024] S2: The U-shaped traveling frame 2 drives the first hydraulic core extractor 511, the second hydraulic core extractor 512, and the splitting rod 521 to move from the initial support closed end of the upper plate towards the working face.

[0025] S3: For each 2-meter section of the deep-buried ditch, the intelligent control system first controls the first hydraulic core drill 511 and the second hydraulic core drill 512 to descend to the calculated height for core drilling. After completion, the first hydraulic core drill 511 and the second hydraulic core drill 512 are retrieved, and the U-shaped walking frame 2 moves forward 2 meters. Then, the splitting rod 521 moves to the position where the core was just retrieved and drops to perform hydraulic splitting on the rock strata in the ditch area. After splitting, the splitting rod is retrieved.

[0026] S4: Clean up the rock fragments and debris generated by splitting to expose a neat drainage channel.

[0027] S5: Repeat steps S3 and S4 until the length of the deep-buried ditch reaches the length of this construction cycle.

[0028] S6: Pour the bottom concrete. Pour concrete at the bottom of the ditch to form the base of the ditch.

[0029] S7: Install precast water pipes after the base concrete (i.e., the base of the water ditch) has set and reached its strength.

[0030] S8: Backfill the middle section with C25 concrete around the pipe to fix its position.

[0031] S9: After the C25 concrete in the middle has set and reached its strength, backfill the top of the precast water pipe with graded crushed stone, and cover the top of the graded crushed stone with geotextile to prevent the initial support concrete from entering the crushed stone layer and causing it to harden, thus affecting the drainage function.

[0032] S10: Install the initial support steel frame for the invert arch and spray the initial support concrete.

[0033] S11: Move the arch bridge forward to install the next slab.

[0034] This invention achieves precise control over the center position, alignment, and bottom elevation of a deeply buried central ditch through a U-shaped traveling frame that can move precisely along a self-propelled arch bridge, a hydraulic core extractor and splitting rod arranged in sections, and an intelligent control system based on a preset algorithm. This forms a dedicated, efficient, and low-disturbance excavation solution for hard rock sections of tunnels in high-altitude and cold regions.

[0035] The above embodiments are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

Claims

1. A construction tooling system for deep-buried central drainage ditch splitting method in high-altitude and cold regions, comprising a U-shaped traveling frame (2) movable relative to a self-propelled inverted arch trestle (1), characterized in that: The self-propelled arch bridge (1) is equipped with a track (11). The U-shaped walking frame (2) includes two vertical supports (21), a transverse connecting beam (22) connecting the two vertical supports (21), and walking wheels (23). The U-shaped walking frame (2) moves on the track (11) via the walking wheels (23). A drive device mounting box (3) is provided below the transverse connecting beam (22). The drive device mounting box (3) contains a motor (31) and an intelligent control system. The U-shaped walking frame (2) is suspended below. The mechanism (4) is equipped with an installation frame (5), which includes a first installation frame (51) and a second installation frame (52) arranged side by side and fixedly connected. The first installation frame (51) is provided with a plurality of first hydraulic core extractors (511) and a plurality of second hydraulic core extractors (512), and the second installation frame (52) is provided with a plurality of splitting rods (521). The first hydraulic core extractors (511), the second hydraulic core extractors (512) and the splitting rods (521) are vertically and vertically mounted on the installation frame (5).

2. The construction tooling for the deep-buried central water ditch splitting method in high-altitude and cold-climate tunnels according to claim 1, characterized in that: The suspension connection mechanism (4) includes two channel steels (41) and a crossbar (42). The two channel steels (41) are fixedly mounted on the transverse connecting beam (22). The crossbar (42) passes through the first mounting frame (51) and the second mounting frame (52). The two ends of the crossbar (42) are respectively connected to the channel steels (41).

3. The construction tooling for the deep-buried central water ditch splitting method in high-altitude and cold-climate tunnels according to claim 2, characterized in that: The crossbar (42) is provided with a limiting device (6) to restrict the lateral displacement of the mounting frame (5). The limiting device (6) includes two reinforcing iron plates (61) arranged vertically and detachably connected, and a high-strength bolt (62) connecting the two reinforcing iron plates (61) to the crossbar (42).

4. The construction tooling for the deep-buried central water ditch splitting method in high-altitude and cold-climate tunnels according to claim 1, characterized in that: The second hydraulic core extractor (512) is symmetrically arranged on both sides of the first hydraulic core extractor (511), and the diameter of the first hydraulic core extractor (511) is larger than the diameter of the second hydraulic core extractor (512).

5. The construction tooling for the deep-buried central water ditch splitting method in high-altitude and cold-climate tunnels according to claim 1, characterized in that: The splitting rod (521) is symmetrically arranged on both sides inside the second mounting frame (52), and the middle part of the second mounting frame (52) is an empty area. The diameter of the splitting rod (521) is 90-110mm.

6. The construction tooling for the deep-buried central water ditch splitting method in high-altitude and cold-climate tunnels according to claim 1, characterized in that: The bottom of the first mounting frame (51) is provided with a first through hole (513) for the first hydraulic core extractor (511) to pass through and a second through hole (514) for the second hydraulic core extractor (512) to pass through. The bottom of the second mounting frame (52) is provided with a third through hole (515) for the splitting rod (521) to pass through.

7. The construction tooling for the deep-buried central water ditch splitting method in high-altitude and cold-climate tunnels according to claim 1, characterized in that: The first hydraulic core extractor (511) is provided with a first threaded steel rod (7) inside, and the second hydraulic core extractor (512) is provided with a second threaded steel rod (8) inside. The upper ends of the first threaded steel rod (7) and the second threaded steel rod (8) are fixedly connected to the top of the first mounting frame (51). The inner wall of the first hydraulic core extractor (511) is provided with an internal thread that matches the external thread of the first threaded steel rod (7). The inner wall of the second hydraulic core extractor (512) is provided with an internal thread that matches the external thread of the second threaded steel rod (8). The motor (31) is electrically connected to the first hydraulic core extractor (511) and the second hydraulic core extractor (512).

8. The construction tooling for the deep-buried central water ditch splitting method in high-altitude and cold-climate tunnels according to claim 1, characterized in that: The splitting rod (521) has a third threaded steel rod (9) inside. The upper end of the third threaded steel rod (9) is fixedly connected to the top of the second mounting frame (52). The inner wall of the splitting rod (521) is provided with an internal thread that matches the external thread of the third threaded steel rod (9). The motor (31) is electrically connected to the splitting rod (521).

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