A cutting process, support device and installation method thereof in a subway station transfer

Abstract

This application relates to the field of subway station construction technology, and in particular to a cutting process, supporting equipment, and installation method for subway station connections, comprising the following steps: mounting a frame; using the frame, accurately measuring the cutting surface with measuring instruments and marking the cutting line; supporting and fixing a rotating wheel on the frame, ensuring the wheel surface is parallel to the stone cutting surface; measuring the length of the cutting line; installing a corresponding number of diamonds on a wire rope to form a wire saw, and fixing the wire saw to the rotating wheel; sequentially connecting the wheel surface to the wire saw machine, and the wire saw machine to the control system, performing a final start-up check; installing supporting equipment to support the stone, erecting a fence, positioning and fixing a water pipe towards the cutting line; workers exiting the fence to perform cutting. This invention reduces the possibility of underground soil collapse and improves the construction safety of underground tunnels.

Description

Technical Field

[0001] This application relates to the field of construction technology for subway stations, and in particular to a cutting process, support equipment and installation method for subway station connections. Background Technology

[0002] Underground rail transit refers to rail transit systems that operate underground, including various forms such as subways, light rail, monorails, and maglev trains. It can make better use of underground space, share the passenger and transportation traffic on the ground, and reduce the impact of ground traffic congestion on people's travel.

[0003] Underground rail transit has many advantages, such as large capacity, high speed, minimal environmental impact, and extremely high punctuality. However, the construction of underground rail transit requires huge financial investment, large-scale tunnel engineering and underground structure construction, and enormous operation and maintenance costs, and is currently only prevalent in highly modernized cities.

[0004] Underground rail transit is constructed using underground tunnels or pits. The construction period for underground rail transit is relatively long. Therefore, rail transit lines are generally opened directly after a certain length is completed and safety is confirmed. After an expansion section is built, safety risks are assessed as quickly as possible. If the safety factor of the expanded section is high, it is opened directly. If a newly constructed underground rail transit line has interchange stations with an existing line, the two lines need to be connected to allow transfers.

[0005] However, because new structures and operating stations are not built concurrently, during the construction of new subway lines, it is inevitable to encounter situations requiring expansion and renovation by connecting with existing structures, due to space requirements and economic considerations. Especially during the underground excavation phase, large boulders are frequently encountered, and direct excavation can easily lead to the collapse of existing underground structures. To address this, the static cutting process using diamond wire saws can be used to remove large boulders that obstruct excavation without damage.

[0006] Regarding the aforementioned technologies, the inventors believe that if large, protruding rocks on the tunnel ceiling are directly removed, they will fall and easily damage surrounding equipment. Furthermore, when cutting the rocks on the tunnel ceiling, it is necessary to support the surrounding soil to prevent vibration from causing the softer soil to collapse. Therefore, a special support device needs to be designed to support the rocks on the tunnel ceiling and the surrounding soil to reduce the possibility of underground tunnel collapse and improve the safety of construction. Summary of the Invention

[0007] To reduce the possibility of underground soil collapse and improve the construction safety of underground tunnels, this invention provides a cutting process, support equipment, and installation method for subway station connections.

[0008] This invention provides a cutting process for subway station connections, comprising the following steps: The frame is used to accurately measure the cutting surface and mark the cutting lines with measuring instruments. The rotating wheel is supported and fixed on the frame so that the wheel surface is parallel to the stone cutting surface. Measure the length of the cutting line, install the corresponding number of diamonds on the wire rope to form a wire saw, and fix the wire saw on the rotating wheel; The diamond wire saw is attached to the cutting line of the stone to be cut and fixed to the stone. Connect the wheel surface to the wire saw, and the wire saw to the control system in sequence, and perform a final start-up check. Install support equipment to support the stone body, erect a fence, point the water pipe toward the cutting line and fix it, and the workers step outside the fence to carry out the cutting.

[0009] By implementing the above installation process, the diamond block is installed onto the steel wire rope of the corresponding length after measurement, corresponding to the length of the diamond wire saw, saving the installation and winding time of the diamond wire saw before cutting. In addition, the height of the mounting frame should be set between the highest and lowest points of the cutting surface to facilitate the tightening of the diamond wire saw on the rotating wheel.

[0010] Another aspect of the present invention provides a supporting device for subway station connections, which adopts the following technical solution: A support device for subway station connections includes a circular disc base as the main support body, and further includes; Support arms, wherein multiple support arms are distributed circumferentially at equal intervals along the disc ring base, the bottom end of the support arm is hinged to the disc ring base, the support arm can rotate at any angle around the hinge point along the radial direction of the disc ring base, and the top end of the support arm is provided with an extension component for extending the length of the support arm. The support leg is provided with multiple legs corresponding to multiple support arms. The top of the support leg is hinged to the middle part of the multiple support arms facing each other. The support leg is provided with a telescopic mechanism. A fixing mechanism is used to fix the four support arms in the vertical direction.

[0011] By adopting the above technical solution, firstly, in order to reduce the direct impact of the falling stone sections, a support device was designed to support stone sections of different shapes. Since the stones inside the underground tunnel are fragmented and irregular in shape, to ensure effective contact with any surface of the stone protruding from the tunnel roof, the support arm is designed to rotate at any angle along the radius of the disc base. The spacing and angle between multiple support arms can be flexibly adjusted to achieve effective contact at the ends of the support arms. Based on this, legs are provided to support the support arms. The legs can rotate up to 90 degrees around the support arm in the direction away from the hinge point. Combined with a telescopic mechanism, effective support points can be flexibly selected to provide stable support for the support arm. Secondly, based on the support arm's ability to rotate at any angle around the hinge point, multiple support arms are rotated to a vertical position. A fixing ring is then added to limit the angle of the vertical support arm, thus achieving columnar support for the soil surrounding the cut stone. These two points standardize the support device, making it a dual-purpose device.

[0012] Optionally, the elongation component includes; A support top arm is provided, with the interior of each support arm hollowed out and slidably connected to the support top arm. The support top arm slides to the outer side of the end of the support arm away from the disc ring base, extending the effective length of the support arm. Each of the multiple support arms has a storage slot on one side facing each other. The storage slot is provided corresponding to the support leg. The support leg rotates around the hinge point to be stored in the storage slot.

[0013] By adopting the above technical solution, the support top arm achieves the extension effect of the support arm, which can adapt to situations where the top of a certain section of the tunnel is too high or the rocks are irregular and one of the support arms needs to be extended. The support top arm can be slid out of the support arm and then fixed. The length slid out corresponds to the distance difference between the top of the support arm and the point of contact with the rock. In addition, since both the support arm and the outriggers are retractable, after processing, the outriggers can be slid into the storage slot and fixed, and the support top arm can be slid into the inside of the support arm and fixed, so that the entire support device can be folded. Workers can directly use the wheel-type rolling disc base, which is convenient for storing the disc base and also facilitates the transportation of the disc base.

[0014] Optionally, each of the outriggers is composed of multiple retractable sleeves connected in sequence, and a retractable rod is slidably disposed inside every two adjacent retractable sleeves. The near ends of multiple adjacent retractable sleeves slide in opposite directions simultaneously to increase the length of the outrigger. Each of the shrink sleeves is threaded at one end with a locking bolt; The length of the retractable rod is less than the length of the retractable sleeve, and a support groove is provided on the retractable rod. The size of the support groove is set to correspond to the end size of the support leg.

[0015] By adopting the above technical solution, a bamboo-like connection is achieved through adjacent contraction sleeves and contraction rods. The contraction rods are staggered inside the contraction sleeves. After loosening the abutment bolts of two adjacent contraction sleeves, the workers slide them in the opposite direction to expose the middle contraction rod. Based on this, multiple adjacent contraction sleeves are slid simultaneously to extend the length of the outriggers. In addition, the bamboo-like distribution allows for flexibility in the position of the support grooves. In some areas where the ground is not suitable for outrigger support, only part of the outriggers can be firmly fixed to the ground, while the remaining outriggers are attached to the support grooves of other contraction rods, achieving a tiered, frame-like fixation to cope with uneven ground and lack of support points. The multiple contraction rods allow for variability in the position of the support grooves, enabling the selection of the most stable structural form for construction. After achieving the necessary construction, the length of the contraction rods is further limited to avoid excessive length of a single contraction rod, which would reduce the stability of the outrigger structure.

[0016] Optionally, each of the supporting top arms is rotatably connected to a plurality of snap rings at its end. The plurality of snap rings are distributed along the length of the supporting top arm to fix the water pipe and can be rotated to any angle to adjust the orientation of the water pipe.

[0017] By adopting the above technical solution, when using a diamond wire saw for cutting, a large amount of heat is generated due to the friction between the diamond wire saw and the cutting stone. Cooling water is needed to remove the heat and grinding debris. The retaining ring directs one end of the water pipe outlet toward the cutting line, so that the high-speed water flow from the water pipe is sprayed into the cutting opening. If there is a deviation in the angle, the retaining ring can be rotated to adjust the direction of the water pipe until one end of the water pipe outlet is against the cutting opening.

[0018] Optional, also includes; The frame groove is formed on the side wall of the disc ring base away from the support arm. Multiple frame grooves are formed at equal intervals along the circumference of the disc ring base, and each frame groove is set as a hemispherical shape. The frame pole has one end in a hemispherical shape that fits the frame groove, and the frame pole is equipped with components for changing the length of the frame pole and fixing the length.

[0019] By adopting the above technical solution, since the ground at the bottom of the tunnel is inevitably uneven, in addition to solving the support problem of the outriggers, it is also necessary to solve the problem of the stability of the disc ring base. When the support point of the rock to be cut is uneven, the disc ring base is placed at an angle. At this time, the spherical end of the frame rod and the frame groove abut against each other to support the upward tilt of the disc ring base, providing it with a support point. The contact end of the frame rod and the frame groove is set with a spherical surface. By utilizing the characteristics of the ball joint, it can adapt to stable contact at various angles.

[0020] Optionally, the fixing mechanism includes; A fixing ring is detachably connected to one side of the disc ring base, and components for engaging the fixing ring are provided at the same height on opposite sides of the multiple support arms.

[0021] By adopting the above technical solution, when the soil around the stone needs support, multiple support arms need to be rotated to a vertical position, and the entire support device is placed in a cylindrical shape. The top of the support arms is placed against the surrounding horizontal soil to prevent the high-frequency vibration during stone cutting from collapsing the surrounding soil. After the multiple support arms are rotated to a vertical position, the fixing ring is clamped at the same height of the support arms to limit the angle of the support arms, stabilize the cylindrical shape of the support device, and prevent the multiple support arms from tilting to the side away from the center of the disc ring base, which would reduce the support effect.

[0022] The present invention also provides a method for installing a rock cutting device in the construction of a ground-rail tunnel connection, comprising the following steps: Roll the disc ring base under the rock to be cut using a wheel-like motion. Adjust the length of the support pole according to the terrain of the tunnel surface and fix it under the disc ring base to keep the disc ring base horizontal. Rotate the support arm to a suitable point, visually estimate the distance from the top of the support arm to the surface of the stone, retract the support arm and extend the top support arm until the end of the top support arm can effectively contact the stone, then rotate the support arm again to contact the stone. Take out the support legs from the storage slot and visually identify the support leg with the strongest fixing effect. Adjust the length of the support leg using the retractable sleeve and then fix it against the ground. Select the best support point for the remaining support legs. For outriggers without stable ground support points, the end of the outrigger can be abutted into the support groove of the first outrigger to be fixed to complete the fixation of the disc ring base.

[0023] By implementing the above installation process, the transportation of the support device is greatly simplified by replacing the traditional manual handling with wheeled rolling, thus improving the efficiency of transportation and installation. Regarding the method in this scheme where workers visually measure the distance between the top of the support arm and the support point at the top of the tunnel, the accuracy requirement for distance is not high in actual construction. Furthermore, the top support point is limited to an effective range; the adjusted support arm simply needs to be within this effective range. It should be noted that the selection criteria for the outrigger with the strongest visual fixing effect should be based on whether there is a suitable mounting body nearby. Secondly, the stability of the mounting body should also be considered. If the mounting body is unstable, the high-frequency vibration during cutting may cause it to collapse, easily leading to the tilting of the entire support device and thus losing its supporting effect on the rock above.

[0024] Optionally, the disc ring base is rolled in a wheel-like manner to be fixed under the stone to be cut, and the reinforcement support points of the surrounding soil are visually assessed. The corresponding number of disc ring bases are then rolled in a wheel-like manner to be under the reinforcement support points. Install support poles at appropriate heights according to the terrain and conditions of the tunnel surface to keep the disc ring base level; After rotating multiple support arms to a vertical position, visually measure the distance between the top of the support arm and the reinforcement support point, reset the support arm and slide the top support arm until the top support arm effectively abuts the reinforcement support point; Rotate the support arm again until the top support arm abuts the top of the tunnel. Remove the fixing ring on the disc ring base, install it at the corresponding position of the fixing ring on the multiple support arms, and fix it.

[0025] By implementing the above installation process steps, relying on the detachable connection between the fixing ring and the disc ring base, the simple installation of the soil support device around the cutting stone is achieved, and the overall shape of the vertical support arm is constrained. Attached Figure Description

[0026] Figure 1 This is a schematic diagram illustrating an application scenario of an embodiment of this application.

[0027] Figure 2 This is a schematic diagram of the overall structure of an embodiment of this application.

[0028] Figure 3 This is a structural diagram designed to highlight the mounting groove on the disc ring base.

[0029] Figure 4 This is a structural diagram designed to highlight the single support arm and leg.

[0030] Figure 5 This is a structural diagram to highlight the vertical state of the support arm.

[0031] Explanation of reference numerals in the attached drawings: 1. Stone support device; 11. Disc ring base; 111. Frame groove; 112. Frame rod; 1121. Semi-threaded rod; 1122. Threaded column groove; 12. Support arm; 13. Support leg; 131. Contraction sleeve; 132. Contraction rod; 133. Support groove; 14. Tightening bolt; 15. Storage groove; 16. Fixing bolt; 17. Support top arm; 171. Ring sleeve; 172. Positioning bolt; 173. Fixing ring groove; 174. Snap ring; 18. Ring groove; 181. Fixing ring; 2. Frame canopy; 3. Diamond wire saw; 31. Rotating wheel. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0033] One embodiment of this application discloses a cutting process in subway station connections, including the following steps; Workers pre-determine the cutting section of the stone and erect the scaffolding at the corresponding height; Workers measure and mark the cutting surface using the scaffold 2, and mark the cutting line according to the connection point of adjacent surfaces. They then adjust the corresponding height of the scaffold 2 to be level with the height of the cutting line, ensuring that the height of the scaffold 2 is between the highest and lowest points of the cutting line. Place the wheel on the frame 2, select the appropriate length of steel wire rope according to the cutting line, attach diamond blocks to form a diamond wire saw, and install the diamond wire saw on the wheel. Fix the diamond wire saw along the cutting line onto the stone to be cut, then connect the wheel surface to the wire saw machine and the wire saw machine to the control system in sequence, and perform a final start-up check. Install stone support device 1 to support the stone body, erect a fence, point the water pipe toward the cutting line and fix it, and the workers step outside the fence to carry out the cutting.

[0034] Another aspect of this application discloses a support device for subway station connections. (See also...) Figure 1 The stone support device 1 is used in conjunction with the diamond wire saw 3, supporting the stone to be cut. The worker needs to mount a frame on one side of the stone support device 1, and place one end of the diamond wire saw 3's rotating wheel 31 on the frame, keeping it horizontal with the pre-calculated cutting line. The worker first installs the stone support device 1 under the stone to be cut, providing support, and then starts the diamond wire saw 3 to cut the stone.

[0035] Reference Figure 2 This application discloses a support device for subway station connections, comprising a circular disc base 11 and multiple support arms 12 hinged to one side of the disc base 11. This embodiment uses four support arms 12, evenly spaced along the circumference of the disc base 11, and capable of rotating up to 180 degrees radially. The four support arms 12 can rotate flexibly at any angle, allowing workers to pre-rotate and fix them to any effective support surface on the stone, depending on its shape. An effective support surface refers to the plane where a stable support point is calculated by the worker. When the cut portion detaches from the stone, the four support arms 12 stably support it, preventing it from falling directly and rolling down uneven ground, damaging the equipment and injuring the worker. Because the stone support device 1 requires high stability during the cutting process, this embodiment is compatible with the static non-destructive cutting technology of a diamond wire saw 3.

[0036] Reference Figure 3The disc ring base 11 has multiple hemispherical support slots 111 circumferentially formed on the side away from the support arm 12. This embodiment also includes support rods 112 adapted to the support slots 111. The support rod 112 is formed by a semi-threaded rod 1121 and a threaded groove 1122 connected at their near ends. The end of the semi-threaded rod 1121 that is away from the threaded groove 1122 is hemispherical. When the unevenness of the tunnel bottom causes the disc ring base 11 to be placed at an angle, the support rod 112 is set at the bottom of the disc ring base 11 and the support rod 112 is attached to the hemispherical contact surface of the support slot 111. The support rod 112 is set vertically with its bottom end touching the ground, thereby supporting the upward tilting side of the disc ring base 11. In actual use, the workers should determine the number of support rods 112 for stable support and the length of the support rods 112 supporting different positions according to the actual situation. The contact surface between the support rod 112 and the support groove 111 is set to a hemispherical shape. Taking advantage of the ball joint, the disc ring base 11 can stably contact the support rod 112 at any angle.

[0037] Reference Figure 2 and Figure 4 Each of the four support arms 12 has a support leg 13 hinged to one side near the disc ring base 11. The support leg 13 is composed of multiple cylindrical shrink sleeves 131 and multiple cylindrical shrink rods 132 interlocked. The inner diameter of the shrink sleeve 131 is adapted to the cross-sectional diameter of the shrink rod 132. The two ends of the shrink rod 132 are respectively inserted into the two shrink sleeves 131. Correspondingly, two shrink rods 132 are respectively fitted at both ends of each shrink sleeve 131. Each shrink rod 132 has a hemispherical support groove 133. The end of each support leg 13 away from the hinge point is provided with a hemispherical block adapted to the hemispherical support groove 133. When the shrink rod 132 slides out of the shrink sleeve 131, the support groove 133 slides out with it. One end of each shrink sleeve 131 is threaded with a locking bolt 14 for fixing the shrink rod 132. To ensure effective support for the support arm 12, the angle between the support arm 12 and the disc ring base 11 is usually acute. Based on this, the bottom end of the support leg 13 abuts against a stable support point on the ground. This stabilizes the angle of the support arm 12 when it abuts against the top stone. In cases where the ground is uneven and some support legs 13 lack effective fixing points on the ground, the support legs 13 that cannot be effectively supported on the ground can be inserted into different parts of the support groove 133, and fixed by stacking them in a step-by-step manner. Thus, this embodiment uses the abutment between the support groove 133 and the bottom end of the support leg 13 to stabilize and fix the support leg 13. Similar to the abutment principle between the frame groove 111 and the frame rod 112, the abutment point between the support groove 133 and the support leg 13 is hemispherical, allowing for effective hinged connection between the support groove 133 and the support leg 13 at any angle. Furthermore, when the support leg 13 abuts against the ground, the hemispherical end face is easier to engage with the groove on the stone than a straight face.

[0038] In this embodiment, the length of the retractable rod 132 constituting the support leg 13 is less than the length of the retractable sleeve 131, but greater than half the length of the retractable sleeve 131. This limitation on the relative lengths of the retractable rod 132 and the retractable sleeve 131 prevents instability of the stone support device 1 due to excessive extension of the retractable rod 132.

[0039] Reference Figure 4 Each support arm 12 has a storage groove 15 corresponding to the initial length of the support leg 13, i.e., the length at which all the ends of the retractable sleeves 131 are connected. The support leg 13 can rotate into the storage groove 15 along the hinge point with the support arm 12. The support arm 12 is threadedly connected to the support leg 13 with a fixing bolt 16. The storage groove 15 is used to store the support leg 13. After the work is completed, the support leg 13 is stored in the storage groove 15, and then the fixing bolt 16 is tightened. The end of the fixing bolt 16 abuts against the support leg 13 in the storage groove 15, and the support leg 13 is stably stored in the storage groove 15. Then, the four support arms 12 are rotated to fit the disc ring base 11, and the entire stone support device 1 is stored in a wheel shape, so that the worker can roll it instead of transporting it.

[0040] Reference Figure 4 Each support arm 12 has a tubular top end, with a support top arm 17 inserted inside. The support top arm 17 can slide along the support arm 12 to extend beyond the top end of the support arm 12. A positioning bolt 172 is threadedly connected to the top end of the support arm 12 to fix the support top arm 17 to its extension length. A ring 171 is rotatably connected to the top end of the support top arm 17, and multiple snap rings 174 are rotatably connected to the ring 171, with the snap rings 174 evenly distributed circumferentially. The support top arm 17 is used to extend the length of the support arm 12. Since the distance between the top and bottom of the underground tunnel is not fixed, the support top arm 17 can be extended to flexibly adapt to situations where the tunnel top is high.

[0041] The locking ring 174 is used to fix the water pipe near the tangent of the diamond wire saw. The water outlet of the water pipe sprays water into the cutting gap of the stone, using water cooling to remove the heat generated by the friction of the diamond wire saw and ensure the service life of the diamond wire saw. In addition, multiple locking rings 174 are rotatably connected, and the position and orientation of the water pipe can be adjusted at any time as the cutting line gradually deepens.

[0042] When the top support arm 17 is housed inside the support arm 12, the ring 171 portion of the top support arm 17 remains outside the support arm 12.

[0043] In this embodiment, the four support arms 12 can also be set vertically, and the stone support device 1 is columnar in shape to support the surrounding area of ​​the cut stone.

[0044] Looking back Figure 2The disc ring base 11 has a ring groove 18, and a fixing ring 181 is engaged in the ring groove 18. The top ends of the four support arms 12 are fixed to opposite sides of the fixing ring groove 173, and the four fixing ring grooves 173 are arranged on the same circumference.

[0045] Reference Figure 5 Four support arms 12 are vertically arranged. The worker removes the fixing ring 181 from the annular groove 18 and snaps it into the fixing annular groove 173 of the support arm 12, maintaining the four support arms 12 in an effectively supported vertical state. Thus, this embodiment achieves multiple uses in one piece, utilizing the flexible hinge of the support arms 12 to support the stone to be cut, while also providing support around the stone.

[0046] The implementation principle of a support device in a subway station connection according to an embodiment of this application is as follows: This embodiment takes into account various problems encountered when expanding underground tunnels for connection through various structural designs. By opening the storage slot 15 and setting the support arm 12 telescopically, the four support arms 12 are folded in a cross shape on the disc ring base 11, which makes it convenient for workers to transport the stone support device 1 to a suitable position and alleviates the problem of uneven ground in the tunnel making it inconvenient to carry. By setting multiple retractable rods 132 and opening multiple retractable sleeves 131, the problem of uneven ground causing some outriggers 13 to have no effective support points on the ground is reasonably solved.

[0047] This application also discloses an installation method for support equipment in a subway station connection as described above, including the following steps: Construction workers push the disc ring base 11 along the tunnel floor and roll it to a suitable position. Then they flatten the disc ring base 11 and adjust the support rod 112 to a suitable length according to the unevenness of the ground. The support rod 112 is placed vertically and the top of the support rod 112 abuts against the support groove 111. Rotate each support arm 12 in sequence until the top of the support arm 12 abuts against the support point of the stone being cut; If the length of the support arm 12 is insufficient, first align the extension line of the support arm 12 with the support point of the stone, then rotate the support arm 12 in the opposite direction to lengthen the support top arm 17 to the corresponding length according to the visual distance. After adjustment, rotate the support arm 12 again to the support point of the stone to be cut. First, select the support leg 13 with the strongest support effect according to the ground conditions, put it against the ground and fix it. Then, rotate each support leg 13 in turn to put the bottom of the support leg 13 against the ground to support the support arm 12. If the subsequent outrigger 13 does not have an effective support point on the ground, the end of the outrigger 13 is abutted into the support groove 133 of the already stably supported outrigger 13.

[0048] When selecting the outrigger 13 with the strongest support effect, the worker should observe the terrain and conditions near the outrigger 13, focusing on the area with fewer rocks, and ensuring that the outrigger 13 is stable and fixed to the support arm 12 and other support arms 12 mounted on it.

[0049] This application further discloses an installation process under another scenario based on the above-described method for installing support equipment in a subway station connection, including the following steps: Construction workers push the disc ring base 11 along the tunnel floor and roll it to a suitable position. Then they flatten the disc ring base 11 and adjust the support rod 112 to a suitable length according to the unevenness of the ground. The support rod 112 is placed vertically and the top of the support rod 112 abuts against the support groove 111. Rotate each support arm 12 sequentially to a vertical position. If the tunnel ceiling is high, the construction worker visually estimates the distance difference between the top of the support arm 12 and the tunnel ceiling, pulls out the support top arm 17 by the corresponding length, and then rotates the support arm 12 again until the support top arm 17 touches the tunnel ceiling again. Remove the retaining ring 181 from the annular groove 18 and place the retaining ring sleeve 171 in the retaining ring groove 173 to maintain the angle of the support arm 12.

[0050] Through the above installation process, the four support arms 12 of the stone support device 1 are rotated to a vertical position, forming a relatively stable columnar support structure, which is then secured by the fixing rings 181 to maintain the columnar structure. After use, the worker reinstalls the fixing rings 181 in the ring grooves 18 to complete the storage of the fixing rings 181.

[0051] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A cutting process for subway station connections, comprising the following steps: The frame (2) is used to accurately measure the cutting surface and mark the cutting line with a measuring instrument. The rotating wheel is supported and fixed on the frame (2) so that the wheel surface is parallel to the stone cutting surface. Measure the length of the cutting line, install the corresponding number of diamonds on the wire rope to form a wire saw, and fix the wire saw on the rotating wheel; The diamond wire saw is attached to the cutting line of the stone to be cut and fixed to the stone. Connect the wheel surface to the wire saw, and the wire saw to the control system in sequence, and perform a final start-up check. Install support equipment to support the stone body, erect a fence, point the water pipe toward the cutting line and fix it, and the workers step outside the fence to carry out the cutting. The supporting equipment used in subway station connections includes a circular disc base (11) as the main support body, and also includes: Support arm (12), multiple support arms (12) are distributed circumferentially at equal intervals along the disc ring base (11), the bottom end of the support arm (12) is hinged to the disc ring base (11), the support arm (12) can rotate at any angle around the hinge point along the radial direction of the disc ring base (11), and the top end of the support arm (12) is provided with an extension component for extending the length of the support arm (12); Support leg (13), the support leg (13) is provided with multiple support arms (12), the top of the support leg (13) is hinged to the middle part of the multiple support arms (12) facing each other, and the support leg (13) is provided with a telescopic mechanism. A fixing mechanism for fixing the four support arms (12) in the vertical direction; The elongation component includes: Support top arm (17), each of the support arms (12) is hollowed out and slidably connected to the support top arm (17), the support top arm (17) slides to the outside of the end of the support arm (12) away from the disc ring base (11), extending the effective length of the support arm (12); A storage slot (15) is provided on one side of each of the multiple support arms (12). The storage slot (15) is provided corresponding to the support leg (13). The support leg (13) can rotate around the hinge point to be stored in the storage slot (15). Each of the support legs (13) is composed of multiple retractable sleeves (131) connected in sequence. A retractable rod (132) is slidably provided inside every two adjacent retractable sleeves (131). The near ends of multiple adjacent retractable sleeves (131) slide in opposite directions at the same time to increase the length of the support leg (13). Each of the shrink sleeves (131) is threaded to a locking bolt (14) at its end; The length of the retractable rod (132) is less than the length of the retractable sleeve (131). A support groove (133) is provided on the retractable rod (132), and the size of the support groove (133) is set to correspond to the end size of the support leg (13). Also includes: The support groove (111) is opened on the side wall of the disc ring base (11) away from the support arm (12). Multiple support grooves (111) are opened at equal intervals along the circumference of the disc ring base (11), and each support groove (111) is set as a hemispherical shape. The frame pole (112) has one end in a hemispherical shape that adapts to the frame groove (111), and the frame pole (112) is provided with a component for changing the length of the frame pole (112) and the fixed length; The fixing mechanism includes: A fixing ring (181) is detachably connected to one side of the disc ring base (11); the disc ring base (11) has an annular groove (18) and the fixing ring (181) is engaged in the annular groove (18); a fixing ring groove (173) is fixed to the opposite side of the top of the support arm (12) and the fixing ring groove (173) is arranged on the same circumference.

2. The cutting process in subway station connection according to claim 1, characterized in that: Each of the supporting top arms (17) is rotatably connected to a plurality of snap rings (174) at its end. The plurality of snap rings (174) are distributed along the length of the supporting top arm (17) for fixing the water pipe and can be rotated to any angle to adjust the orientation of the water pipe.

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