A new type of connecting passage excavation equipment

Abstract

The present invention discloses a novel excavation equipment for connecting passages in the field of tunnel excavation, which includes a support trolley system, a rotary drilling rig system, a segment connection system, an inner sleeve support system, a door opening joint sealing system, a pressure maintaining system, a grease injection system and a hydraulic system. It does not need to use the freezing method for reinforcement, is less affected by factors such as weather, and improves the safety factor; the weather conditions have little influence on the use of this excavation equipment, reducing complex preliminary work preparations, can adapt to different stratum geological conditions, is more convenient and fast, and saves time costs; the equipment structure is relatively simple, all functional equipment is installed on one trolley, the volume is small, and there is no need to spend high costs.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel excavation, and particularly to a new type of connecting passage excavation device. Background Art

[0002] Urban ground space resources are becoming increasingly scarce, and it has become a consensus that the development of underground space is needed to fill and realize urban functions. At present, the development of underground space has gradually developed into a spatial and networked form. With the continuous improvement of geotechnical engineering theory, the continuous progress of foundation reinforcement and improvement technology, and the continuous development of tunneling machine manufacturing technology, various construction processes and tunnel excavation equipment with different forms and functions have emerged, making it possible to realize the development of various underground spaces in a micro-disturbance form. In order to achieve the interconnection of the underground space network, a large number of T-connected tunnels need to be constructed: subway and highway connecting passages; subway entrances and ventilation shafts; municipal utility tunnel inspection wells; water tunnel connecting lines. Currently, most of these connection projects are mainly constructed by the mining method.

[0003] Currently, the connecting passage is generally excavated by the mining method, and the excavation range is reinforced by methods such as the freezing method and ground reinforcement.

[0004] The freezing effect is affected by many factors and is difficult to control; when constructing by the mining method, there are potential safety hazards on the excavation surface. As follows:

[0005] ① If a sand layer is encountered, it is easy to cause the instability of the soil near the orifice, resulting in incomplete freezing perfusion and unsatisfactory freezing effect. Moreover, the sand layer is exactly the geological environment that is often encountered.

[0006] ② The freezing range is not easy to control, which is likely to cause waste of resources and uneven freezing effect.

[0007] ③ During the freezing process, the soil will expand, resulting in ground uplift, while during thawing, the soil will subside and the duration is very long. Therefore, it is extremely easy to cause soil instability.

[0008] ④ After thawing, the soil settlement is likely to cause the pressure on the shaft or tunnel lining to become large or uneven, and there are many construction joints, which are likely to cause water seepage and other forms of leakage.

[0009] ⑤ When the freezing pipe is within the range of the sump, the freezing needs to be suspended when excavating the sump. Due to the good creep property of the frozen soil, there will be a relatively large creep process in the failure line of the frozen soil curtain, and the safety of the frozen soil will be relatively poor.

[0010] Replacing the mining method with a fully mechanical process such as the shield method is the development trend of underground tunnel technology. However, the conventional shield method needs to redesign and manufacture the shield machine according to the strata, and supporting infrastructure for construction needs to be provided before tunneling, with high costs and long construction periods.

[0011] Based on this, the present invention designs a new type of connection passage excavation device to solve the problems of too long construction period, large resource consumption, and too high cost of current tunneling equipment. Summary of the Invention

[0012] The object of the present invention is to provide a new type of connection passage excavation device to solve the above-mentioned problems.

[0013] To achieve the above object, the present invention provides the following technical solutions:

[0014] A new type of connection passage excavation device, comprising a support trolley system, a rotary drilling rig system, a segment connection system, an inner sleeve support system, a door opening connecting plate sealing system, a pressure maintaining system, a grease injection system and a hydraulic system; the support trolley system includes a flatbed truck, walking wheels, support shoes and servo cylinders, the front and rear of the flatbed truck are connected with the support shoes through the servo cylinders, the walking wheels are welded to the bottom of the flatbed truck, the flatbed truck walks on the tunnel track through the walking wheels, and the support trolley system is controlled by the servo cylinders and is used for protecting the tunnel structure during the whole process of tunnel construction; the rotary drilling rig system includes a hydraulic motor, a reducer, a transmission box, a gear, an idler gear, a gear ring, rollers, a rolling ring, an upper support, a lower support and a clamping cylinder; the hydraulic motor is connected with the reducer, the reducer is connected with the transmission box, the reducer is meshed with the internal teeth of the gear, the external teeth of the gear and the gear ring are respectively meshed with the idler gear, the idler gear is fixed inside the transmission box through an idler gear shaft, the gear ring is fixedly combined with the end cover one through three rows of the rollers on the lower support; the rolling ring and four rows of the rollers are fixedly combined with the end cover two and the end cover three on the upper support, the transmission box is connected with one end of the clamping cylinder through a connecting pin two, the other end of the clamping cylinder is connected with a connecting seat welded on the upper support through a connecting pin one, and a clamping block is connected to the gear ring and the rolling ring through a transmission rod and a connecting pin three; during operation, the rotary drilling rig system is arranged outside the casing, and the pump station drives the clamping cylinder to act through an oil pipe, drives the whole upper support to act, and the clamping block protrudes inwards and approaches the casing until the clamping action is completed; after the clamping action is completed, the pump station drives the hydraulic motor to act through the oil pipe, and transmits the force to the gear through the reducer, and the gear drives the gear ring to rotate through the idler gear, and finally realizes the rotation of the casing; the rotary drilling rig system controls the clamping cylinder and the hydraulic motor through hydraulic pressure to provide power for the equipment tunneling; the segment connection system includes a casing crane, a casing and a casing hoisting track; the casing crane is installed on the casing hoisting track, the casing hoisting track is welded on the top of the tunnel, and the casing includes a plurality of segments and a cutter head fixed at the front end of the segments; the segment connection system is responsible for the hoisting, transportation and subsequent splicing of the segments; the inner sleeve support system includes an inner sleeve, the inner sleeve includes a cylinder and a cover plate arranged at one end of the cylinder, a sealing brush is welded on the front end of the outer periphery of the cylinder, slurry discharge holes, slurry inlet holes and feeding windows are opened on the cover plate, a circle of support shoe cylinder bases and rear support cylinder bases are welded on the outside of the cylinder, a support shoe cylinder is connected to the support shoe cylinder base, a support cylinder is connected to the rear support cylinder base, and a circle of rollers is installed outside the cylinder, and the rollers rotate synchronously with the casing;The inner sleeve support system is used to seal and prevent the leakage of sediment inside the segment. Shield tail grease is injected through the grease hole at the bottom to the sealing brush along the outer edge and smeared on the inner side of the segment. The support cylinder and the shoe cylinder are hydraulically controlled to perform segment connection and stepping work; the portal joint plate sealing system includes a portal joint plate. An oil cylinder support is welded to the outer periphery of the portal joint plate. An accumulator is installed on the rear wall of the portal joint plate. A chevron seal is installed at the front end. Three circles of sealing brushes are welded to the inner wall. A grease hole communicating with the front sealing brush is provided at the bottom; the portal joint plate sealing system is used to seal the gap between the tunnel and the segment, prevent formation water, mortar and solids from leaking. When the segment steps, shield tail grease is injected through the grease hole in the portal joint plate and smeared on the outer side of the segment to reduce the friction between the portal joint plate sealing system and the segment; the pressure maintaining system includes a pressure sensor, a PLC, an air compressor, a slurry storage tank, a safety valve, a pressure gauge, a liquid level gauge, a slurry pipe and a ball valve installed inside the inner sleeve support system. The liquid level gauge is located in the slurry storage tank. The pressure sensor, the air compressor and the liquid level gauge are electrically connected to the PLC through signal lines. The air compressor is connected to the slurry storage tank through an air pipe. A pressure gauge is provided on the slurry storage tank. A safety valve is provided between the pressure gauge and the slurry storage tank. The slurry storage tank is connected to the inner sleeve support system through a slurry pipe with a ball valve; the pressure sensor detects the pressure inside the inner sleeve support system and uploads the detection signal to the PLC through the signal line. When the internal pressure is lower than the predetermined limit, the PLC gives an instruction and conveys it to the air compressor through the signal line. The air compressor starts and injects compressed air into the slurry storage tank. The pressure gauge shows the instant air pressure in the upper part of the slurry storage tank. The liquid level gauge shows the real-time liquid level in the slurry storage tank and transmits it to the PLC. The safety valve ensures that the pressure will not exceed the limit value. The ball valve is in the normally open state. The air pressure in the upper part presses the slurry in the lower part of the slurry storage tank into the inner cavity of the inner sleeve support system through the slurry pipe. The internal pressure of the inner sleeve support system returns to the set value. The PLC receives the signal from the pressure sensor, gives an instruction and turns off the air compressor; such a feedback cycle ensures the stability of the pressure inside the inner sleeve support system; the grease injection system includes a grease pump, an electric control valve, a pressure sensor and a PLC. The grease pump, the electric control valve and the pressure sensor are respectively electrically connected to the PLC. The inner sleeve support system and the portal joint plate system are provided with grease through the grease injection system;The grease pump is respectively connected to the grease holes of the door opening joint sealing system and the inner sleeve support system through grease pipes installed with electric control valves. The grease holes on the door opening joint sealing system and the inner sleeve support system are connected with the pressure sensors. The signals collected by the pressure sensors are transmitted to the PLC through signal lines. When the pressure in the grease holes is insufficient, the PLC receives the signal and gives instructions to the grease pump and the electric control valve respectively. The grease pump operates, and the electric control valve opens. Driven by the grease pump, grease is injected from the grease pipe into the sealing brushes of the door opening joint sealing system and the inner sleeve support system. When the set pressure is reached, the grease pump stops operating, and the electric control valve closes. Through such feedback regulation, the pressure in the sealing cavity is maintained stable. The hydraulic system is installed on the flat car of the trolley support system. The hydraulic system includes an oil tank, a motor, and a pump head. The bottom traveling wheels of the flat car are placed on the tunnel track and move along with the trolley support system. The oil tank is welded and fixed on the flat car. The motor is fixed on the flat car. The pump head is matched with the motor through a coupling. Before starting, the trolley support system moves the flat car to the designated location. During starting, the motor is controlled to pump the hydraulic oil in the oil tank out from the pump head through the oil pipe and into the servo cylinder of the trolley support system. The servo cylinder is connected to the support shoe through two end lugs. As the cylinder extends, the support shoe presses against the tunnel segment. After adjusting the pressure and fixing the corresponding positions of each support shoe of the trolley support system, tunneling begins. The hydraulic system controls the servo cylinders on the rotary drilling rig system and the inner support trolley system, and the support shoe cylinders and support cylinders on the inner sleeve support system. The pressure maintaining system conducts slurry injection and drainage into the inner sleeve support system. The grease injection system injects grease into the sealing brushes in the inner sleeve support system and the door opening joint sealing system. The sealing brushes act on the inner and outer walls of the casing in the segment connection system. The rotary drilling rig system slides on the support trolley system and is connected to the right support ear seat of the trolley support system through a stepping cylinder. The door opening joint sealing system is connected to the support trolley system through six small cylinders. The inner sleeve support system and the door opening joint sealing system are both closely attached to the tunnel wall. The rotary drilling rig system drives the casing to rotate and break through the tunnel wall. The casing crane moves on the casing hoisting track to complete the hoisting, transportation, and splicing work of the segments. The casing is composed of multiple segments and a front cutter head.

[0015] Preferably, it further includes a fixed anti-collapse device arranged at a position corresponding to the right-line working area, i.e., the working area on the right side of the tunnel. The fixed anti-collapse device includes a sealed steel structure, channel steel, and a support. The sealed steel structure is welded to the left side of the right-line working area, the channel steel is welded to the right side of the right-line working area, the end of the channel steel is connected to the support, and the support is closely attached to the right side of the right-line working area.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] 1. Higher safety

[0018] Currently, the mining method is generally used for excavation and the freezing method is used for reinforcement in the current connection passage. During the construction of the freezing method, the hydrogeological and geological conditions at the connection passage are poor. The freezing holes are constructed in the water-rich soil layer, and the implementation effect is affected by factors such as weather, geology, and human factors. It is easy to have problems such as water leakage and sand gushing, and it is difficult to control the reinforcement effect, which may cause safety accidents such as ground settlement and collapse. The present invention provides a brand-new connection passage tunneling device, which does not need to use the freezing method for reinforcement, is less affected by factors such as weather, and improves the safety factor.

[0019] 2. Shorter time consumption

[0020] For the construction of the freezing method, the preparatory work in the early stage is relatively complex, and different schemes need to be determined according to different geological conditions and weather conditions. The present invention provides a brand-new connection passage tunneling device, which is less affected by weather conditions, reduces the complex preparatory work in the early stage, can adapt to different stratum geological conditions, is more convenient and fast, and saves time costs.

[0021] 3. Lower cost

[0022] For the currently used shield method for excavating the connection passage, a shield machine with a suitable size needs to be redesigned, which has a high cost and a long construction period. The present invention provides a brand-new connection passage tunneling device, the equipment structure is relatively simple, all functional equipment is installed on a single trolley, the volume is small, and there is no need to spend a high cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 It is a schematic diagram of the system control structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the main structure of the present invention;

[0026] Figure 3 Schematic diagram of the trolley support system and hydraulic system of the present invention;

[0027] Figure 4 Schematic diagram of the rotary drilling rig system;

[0028] Figure 5 Schematic diagram of the pressure maintaining system;

[0029] Figure 6 Schematic diagram of the grease injection system;

[0030] Figure 7 Schematic diagram of the system structure during starting and step change, i.e., Figure 8 Cross-sectional view C-C in

[0031] Figure 8 is Figure 7 Cross-sectional view A-A in

[0032] Figure 9 is Figure 7 Cross-sectional view B-B in

[0033] Figure 10 Schematic diagram of the present invention and its fixed anti-collapse device;

[0034] Reference numerals are as follows:

[0035] 1. Support trolley system, 101. Flatbed truck, 102. Traveling wheels, 103. Support shoes, 104. Servo cylinder, 2. Rotary drilling rig system, 201. Hydraulic motor, 202. Reducer, 203. Transmission box, 204. Gear, 205. Idler gear, 206. Ring gear, 207. Roller, 208. Rotating ring, 209. Upper support, 210. Lower support, 211. Clamping cylinder, 212. Idler gear shaft, 213. End cover one, 214. End cover two, 215. End cover three, 216. Connecting pin two, 217. Connecting pin one, 218. Connecting seat, 219. Clamping block, 220. Transmission rod, 221. Connecting pin three, 222. Pumping station, 223. Oil pipe, 3. Segment connection system, 301. Sleeve crane, 302. Sleeve, 3021. Segment, 3022. Cutter head, 303. Sleeve hoisting track, 4. Inner sleeve support system, 401. Inner sleeve, 402. Cylinder, 403. Sealing brush, 404. Slurry discharge hole, 405. Slurry inlet hole, 406. Feeding window, 407. Support shoe cylinder base, 408. Rear support cylinder base, 409. Support shoe cylinder, 410. Support cylinder, 411. Drum, 5. Door opening joint plate sealing system, 501. Door opening joint plate, 5011. Door opening joint plate connection ear seat, 502. Cylinder support, 503. Accumulator, 6. Pressure maintaining system, 601. Pressure sensor, 602. Air compressor, 603. Slurry storage tank, 604. Safety valve, 605. Pressure gauge, 606. Liquid level gauge, 607. Slurry pipe, 608. Ball valve, 609. Signal line, 7. Grease injection system, 701. Grease pump, 702. Electric control valve, 703. Grease pipe, 8. Hydraulic system, 801. Oil tank, 802. Motor, 803. Pump head, 804. Coupling, 9. Tunnel track, 10. Grease hole, 11. Stepping cylinder, 12. Small cylinder, 13. Fixed anti-collapse device, 1301. Sealed steel structure, 1302. Channel steel, 1303. Support, 14. Tunnel segment. Detailed implementation manners

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0037] Please refer to Figure 2-9 , a new type of connecting passage excavation equipment, including a support trolley system 1, a rotary drilling rig system 2, a segment connection system 3, an inner sleeve support system 4, a door opening joint plate sealing system 5, a pressure maintaining system 6, a grease injection system 7, and a hydraulic system 8.

[0038] The support trolley system 1 includes a flatbed truck 101, walking wheels 102, support shoes 103 and servo cylinders 104. The support shoes 103 are connected to the front and rear of the flatbed truck 101 through the ear seats 105 and the servo cylinders 104. The walking wheels 102 are welded to the bottom of the flatbed truck 101. The flatbed truck 101 travels on the tunnel track 9 through the walking wheels 102. The support trolley system 1 is controlled by the servo cylinders 104 and is used for protecting the tunnel structure during the whole process of tunnel construction.

[0039] The rotary drilling rig system 2 includes a hydraulic motor 201, a speed reducer 202, a transmission case 203, gears 204, idler gears 205, a gear ring 206, rollers 207, a ring gear 208, an upper support 209, a lower support 210, and a clamping cylinder 211. The hydraulic motor 201 is connected to the speed reducer 202. The speed reducer 202 is connected to the transmission case 203. The speed reducer 202 meshes with the internal teeth of the gear 204. The external teeth of the gear 204 and the gear ring 206 are respectively meshed with the idler gear 205. The idler gear 205 is fixed inside the transmission case 203 through an idler gear shaft 212. The gear ring 206 is combined and fixed to the lower support 210 through three rows of rollers 207 and an end cover 1 213. The ring gear 208 and four rows of rollers 207 are combined and fixed to the upper support 209 through an end cover 2 214 and an end cover 3 215. The transmission case 203 is connected to one end of the clamping cylinder 211 through a connecting pin 2 216. The other end of the clamping cylinder 211 is connected to a connecting seat 218 welded to the upper support 209 through a connecting pin 1 217. The clamping block 219 is connected to the gear ring 206 and the ring gear 208 through a transmission rod 220 and a connecting pin 3 221. During operation, the rotary drilling rig system 2 is arranged outside the casing 302. The pump station 222 drives the clamping cylinder 211 to act through an oil pipe 223, driving the overall movement of the upper support 209. The clamping block 219 protrudes inward and approaches the casing 302 until the clamping action is completed. After the clamping action is completed, the pump station 222 drives the hydraulic motor 201 to act through the oil pipe 223. The force is transmitted to the gear 204 through the speed reducer 202. The gear 204 drives the gear ring 206 to rotate through the idler gear 205, finally realizing the rotation of the casing 302. The rotary drilling rig system 2 controls the clamping cylinder 211 and the hydraulic motor 201 through hydraulic pressure to provide power for the equipment tunneling.

[0040] The segment connection system 3 includes a casing crane 301, a casing 302 and a casing hoisting track 303. The casing crane 301 is installed on the casing hoisting track 303. The casing hoisting track 303 is welded to the top of the tunnel segment 14. The casing 302 includes several segments 3021 and a cutter head 3022 fixed to the front end of the segment 3021. The segment connection system 3 is responsible for the hoisting, transportation and subsequent splicing of the segments 3021.

[0041] The inner sleeve support system 4 includes an inner sleeve 401 which comprises a cylinder 402 and a cover plate arranged at one end of the cylinder. A sealing brush 403 is welded to the front end of the outer periphery of the cylinder 402. Drainage holes 404, slurry inlet holes 405 and feeding windows 406 are formed in the cover plate. A circle of support shoe oil cylinder bases 407 and rear support oil cylinder bases 408 are welded to the outside of the cylinder 402. A support shoe oil cylinder 409 is connected to the support shoe oil cylinder base 407, and a support oil cylinder 410 is connected to the rear support oil cylinder base 408. A circle of rollers 411 is installed outside the cylinder 402, and the rollers 411 rotate synchronously with the casing 302. The inner sleeve support system 2 is used to seal and prevent the leakage of sediment inside the segment 3021. Shield tail grease is injected through the grease hole 10 at the bottom to the sealing brush 403 along the outer edge and smeared on the inner side of the segment 3021. The support oil cylinder 410 and the support shoe oil cylinder 409 are hydraulically controlled to perform the segment connection and stepping work.

[0042] The portal joint plate sealing system 5 includes a portal joint plate 501. Oil cylinder supports 502 are welded to the outer periphery of the portal joint plate 501. An accumulator 503 is installed on the rear wall of the portal joint plate 501. A chevron seal is installed at the front end part. Three circles of sealing brushes 403 are welded to the inner wall. A grease hole 10 communicating with the front sealing brush is arranged at the bottom. The portal joint plate sealing system 5 is used to seal the gap between the tunnel segment 14 and the segment 3021, prevent the leakage of formation water, mortar and solids. When the segment 3021 steps, shield tail grease is injected through the grease hole 10 in the portal joint plate 501 and smeared on the outer side of the segment 3021 to reduce the friction between the portal joint plate sealing system 5 and the segment 3021.

[0043] The pressure-holding system 6 includes a pressure sensor 601, a PLC, an air compressor 602, a slurry storage tank 603, a safety valve 604, a pressure gauge 605, a liquid level gauge 606, a slurry pipe 607 and a ball valve 608 installed inside the inner sleeve support system 4. The liquid level gauge 606 is arranged in the slurry storage tank 603. The pressure sensor 601, the air compressor 602 and the liquid level gauge 606 are electrically connected to the PLC through a signal line 609. The air compressor 602 is connected to the slurry storage tank 603 through an air pipe 610. A pressure gauge 605 is arranged on the slurry storage tank 603. A safety valve 611 is arranged between the pressure gauge 605 and the slurry storage tank 603. The slurry storage tank 603 is communicated with the inner sleeve support system 4 through the slurry pipe 607 with a ball valve 608. The pressure sensor 601 detects the pressure inside the inner sleeve support system 4 and uploads the detection signal to the PLC through the signal line 609. When the internal pressure is lower than a predetermined limit, the PLC gives an instruction and conveys it to the air compressor 602 through the signal line. The air compressor 602 starts, and compressed air is injected into the slurry storage tank 603. The pressure gauge 605 shows the instant air pressure in the upper part of the slurry storage tank 603. The liquid level gauge 606 shows the real-time liquid level in the slurry storage tank 603 and transmits it to the PLC. The safety valve 604 ensures that the pressure will not exceed the limit value. The ball valve 608 is in an open state all the time. The upper air pressure presses the slurry at the lower part of the slurry storage tank 603 into the inner cavity of the inner sleeve support system 4 through the slurry pipe 607. When the pressure inside the inner sleeve support system 4 returns to the set value, the PLC receives the signal from the pressure sensor 601 and gives an instruction to turn off the air compressor 602. In this way, through feedback circulation, the pressure inside the inner sleeve support system 4 is ensured to be stable.

[0044] The grease injection system 7 includes a grease pump 701, an electric control valve 702, a pressure sensor 601 and a PLC. The grease pump 701, the electric control valve 702 and the pressure sensor 601 are respectively electrically connected to the PLC. The grease injection system 7 provides grease for the inner sleeve support system 4 and the door opening connecting plate system 5. The grease pump 701 is respectively connected to the grease holes 10 of the door opening connecting plate sealing system 5 and the inner sleeve support system 4 through a grease pipe 703 equipped with an electric control valve 702. Pressure sensors 601 are connected to the grease holes 10 on the door opening connecting plate sealing system 5 and the inner sleeve support system 4. The signals collected by the pressure sensors 601 are transmitted to the PLC through the signal line 609. When the pressure in the grease hole 10 is insufficient, the PLC receives the signal and gives instructions to the grease pump 701 and the electric control valve 702 respectively. The grease pump 701 operates, and the electric control valve 702 opens. Driven by the grease pump 701, grease is injected into the sealing brushes 403 of the door opening connecting plate sealing system 5 and the inner sleeve support system 4 through the grease pipe 703. When the set pressure is reached, the grease pump 701 stops operating and the electric control valve 702 closes. Through such feedback adjustment, the pressure in the sealing cavity is maintained stable.

[0045] The hydraulic system 8 is installed on the flatbed truck 101 of the trolley support system 1. The hydraulic system 8 includes an oil tank 801, a motor 802, and a pump head 803. The bottom traveling wheels 102 of the flatbed truck 101 are placed on the tunnel track 9 and move along with the trolley support system 1. The oil tank 801 is welded and fixed on the flatbed truck 101, the motor 802 is fixed on the flatbed truck, and the pump head 803 is coupled with the motor 802 through a coupling 804. Before starting, the trolley support system moves the flatbed truck 101 to a designated location. When starting, the motor 802 is controlled to pump the hydraulic oil in the oil tank 801 out through the pump head 803 via a pipeline and inject it into the servo cylinder 104 of the trolley support system 1. The servo cylinder 104 is connected to the support shoe 103 through the two end lugs 105. As the servo cylinder 104 extends, the support shoe 103 abuts against the tunnel segment 14. After adjusting the pressure and fixing the corresponding positions of each support shoe 103 of the trolley support system 1, tunneling begins.

[0046] Please refer to Figure 1 , the hydraulic system 8 controls the rotary drilling rig system 2, the servo cylinder 104 on the support trolley system 1, the support shoe cylinders 409 and the support cylinders 410 on the inner sleeve support system 4. The pressure maintaining system 6 pumps slurry into and discharges slurry from the inner sleeve support system 4. The grease injection system 7 injects grease into the sealing brushes 403 in the inner sleeve support system 4 and the door opening connecting plate sealing system 5. The sealing brushes 403 act on the inner and outer walls of the casing 302 in the segment connection system 3. The rotary drilling rig system 2 slides on the support trolley system 1 and is connected to the right support lug of the trolley support system 1 through the stepping cylinder 11. The door opening connecting plate sealing system 5 is connected to the support trolley system 1 through six small cylinders 12. Both the inner sleeve support system 4 and the door opening connecting plate sealing system 5 are closely attached to the wall of the tunnel segment 14. The rotary drilling rig system 2 drives the casing 302 to rotate and break through the pipe wall. The casing crane 301 moves on the casing hoisting track 303 to complete the hoisting, transportation, and splicing of the segment 3021. The casing 302 is composed of multiple segments 3021 and a front cutter head 3022. The tunnel segment 14 and the support trolley system 1 provide support for opening up the left and right tunnel sides, reducing damage to the tunnel. The rotary drilling rig system 2 is similar to a drill bit fixing part and a power drill bit, installed in the middle of the tunnel to provide fixation and power. The door opening connecting plate 501 is similar to a retaining joint.

[0047] Please refer to Figure 10 , a fixed anti-collapse device 13 is set at the corresponding position in the right-line working area, i.e., the working area on the right side of the tunnel. The fixed anti-collapse device includes a sealed steel structure 1301, a channel steel 1302, and a support 1303. The sealed steel structure 1301 is welded to the left side of the right-line working area, the channel steel 1302 is welded to the right side of the right-line working area, and a support 1303 is connected to the end of the channel steel and is closely attached to the right side of the right-line working area.

[0048] During specific implementation, the construction steps of the new connecting passage excavation equipment are as follows:

[0049] 1. Equipment installation steps before entering the tunnel

[0050] 1) Install the portal connecting plate 501 on the right side of the support trolley system 1 in the shield tunneling direction. The outer circular side lugs of the portal connecting plate 501 are connected to the ear seats at the right side support of the support trolley system 1 through the small oil cylinder 12.

[0051] 2) The bottom of the rotary drilling rig system 2 is equipped with wheels and is placed on the track in the center of the support trolley system through these wheels, and confirm that the rotary drilling rig system slides smoothly without interference.

[0052] 3) Connect the stepping oil cylinder 11 on the rotary drilling rig system to the fixed ear seat on the right side support of the support trolley system 1.

[0053] 4) Install the cutter head 3022 at the front end of the starting segment 3021 through the casing hoist 301, and place the casing 302 into the rotary drilling rig system 2, ensuring the length margin of the casing 302.

[0054] 5) Start the pump station 222 and drive the clamping oil cylinder 211 inside the rotary drilling rig system 2 to act: the clamping oil cylinder 211 contracts, and the lifting layer of the rotary drilling rig system 2, that is, the upper support 209, descends as a whole, driving the clamping block 219 to protrude and approach the casing 302 and finally clamping it. After clamping the casing 302, the casing 302 can be driven to rotate, and the clamping and loosening of the casing 302 are regulated by controlling the extension and retraction of the clamping oil cylinder 211.

[0055] 6) Install the inner sleeve 401.

[0056] 2. After installation, enter the tunnel and make excavation preparation work

[0057] 1) Send the support trolley system 1 into the left-line working area, that is, the corresponding position on the left side of the tunnel segment. The bottom of the flatbed truck 101 in the support trolley system 1 is welded with traveling wheels 102.

[0058] 2) The battery car drives the support trolley system 1 and the pump station 222 along the tunnel track 9 to the starting point of the connecting passage excavation.

[0059] 3) At this time, extend the servo oil cylinder 104 to drive the support trolley system 1 to support evenly and tightly on the inner wall of the tunnel segment 14 in all directions.

[0060] 4) Supply oil and pressurize and then retract the 6 small oil cylinders 12 connecting the portal connecting plate 501, and confirm that the mountain-shaped seal at the front end of the portal connecting plate 501 is evenly pressed on the tunnel segment 14. The external accumulator 503 ensures that the oil cylinder does not release pressure and there is no slurry leakage in case of power failure during work.

[0061] 5) A fixed anti-collapse device 13 is set at the corresponding position on the right side of the working area of the right tunnel, i.e., on the right side of the tunnel segment, which consists of a sealed steel structure 1301, channel steel 1302, and a support 1303. The fixed anti-collapse device is used to support the inside of the built right tunnel to prevent collapse and damage. That is, when the excavation equipment excavates from the left tunnel to the right tunnel, the right tunnel will receive a thrust, avoiding damage to the built right tunnel caused by the thrust and the collapse of the right tunnel.

[0062] 3. Excavation starting work

[0063] 1) Start the hydraulic motor 201 of the rotary drilling rig system 2 to rotate at a low speed. The stepping cylinder 11 of the rotary drilling rig system 1 acts, cooperating with the clamping cylinder 211. The front cutter head 3022 of the segment 3021 passes through the sealing brush 403 inside the inner ring of the portal connecting plate 501 and reaches one side of the tunnel segment 14. After the first segment 3021 of the sleeve 302 and the cutter head 3022 break through the wall of the tunnel segment 14, stop the rotary drilling rig system 2. At this time, a closed space is formed between the inner sleeve 401 and the part of the tunnel segment 14 drilled by the sleeve 302.

[0064] 2) Extend the 4 support cylinders 410 outside the inner sleeve 401 and press them against the shoe of the support trolley system 1.

[0065] 3) After confirming the completion of the operation, the grease pump 701 starts to act, opens the electric control valve 702, and injects grease into the sealing brush 403 of the portal connecting plate 501 and the inner sleeve 302 until grease overflows (observed from the bottom feeding window 406 of the inner sleeve), and observe the pressure change.

[0066] 4) Use the sleeve crane 301 to fill the inner sleeve cavity with muck through the feeding window 406. When the filling reaches the designed required depth, use bolts to close the feeding window.

[0067] 5) Connect the pipeline between the slurry inlet 405 and the slurry outlet 406 at the bottom of the inner sleeve 401, add water to the inside. The internal pressure of the inner sleeve 401 is uploaded to the upper computer by the earth pressure sensor for display, and corrected through slurry input and output until the normal working pressure range is met, and the excavation starting work is completed.

[0068] 4. Step change

[0069] 1) The accumulator 503 provides pressure (ensuring that the pressure of the accumulator of the inner sleeve shoe cylinder is always stable within the required range), extend the shoe cylinder 409 so that the shoe cylinder 409 presses against the sleeve wall, generating a frictional force to offset the force in the closed space inside the inner sleeve.

[0070] 2) Retract the support cylinder 410 to leave space for segment connection.

[0071] 3) Use the casing crane 301 to connect the second segment behind the first segment, and fix the segments to each other by pins or welding.

[0072] 4) Start the rotary drilling rig system 2 again, start the hydraulic motor 201 of the rotary drilling rig system, rotate at a low speed, the drill step cylinder 11 operates, cooperate with the clamping cylinder 211, drive the casing to excavate forward, stop after reaching the designed position, and turn off the drilling rig.

[0073] 5) Repeat steps 3) and 4) until approaching the excavation end point of the connection passage.

[0074] 5. Breaking through the tunnel

[0075] 1) Continue to start the step of the rotary drilling rig system 2 until the cutter head on the casing breaks through the wall of the segment 14 of the right-line tunnel. The sealed steel structure 1301 can prevent the muck in the connection passage from flowing into the right-line working area, avoiding dangers such as cave-ins.

[0076] 2) The rotary drilling rig system stops working, and the staff enters the connection passage to remove the muck and disassemble the right-line sealed steel structure 1301.

[0077] 3) Reinforce the connection of every two segments to ensure stiffness and strength.

[0078] In the description of this specification, the descriptions referring to terms such as "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0079] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification in order to better explain the principles and practical applications of the present invention, so that those skilled in the art in the relevant technical field can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A new type of connecting passage excavation device, characterized in that: It includes a support trolley system, a rotary drilling rig system, a segment connection system, an inner sleeve support system, a door opening connecting plate sealing system, a pressure maintaining system, a grease injection system and a hydraulic system; The support trolley system includes a flatbed truck, walking wheels, support shoes and servo cylinders. The support shoes are connected to the front and rear of the flatbed truck through ear seats by the servo cylinders. The walking wheels are welded to the bottom of the flatbed truck. The flatbed truck travels on the tunnel track through the walking wheels. The support trolley system is controlled by the servo cylinders and is used for protecting the tunnel structure during the whole process of tunnel construction; The rotary drilling rig system includes a hydraulic motor, a reducer, a transmission box, gears, idler gears, a gear ring, rollers, a rolling ring, an upper support, a lower support and a clamping cylinder. The hydraulic motor is connected to the reducer, the reducer is connected to the transmission box, the reducer meshes with the internal teeth of the gear, the external teeth of the gear and the gear ring respectively mesh with the idler gear. The idler gear is fixed inside the transmission box through an idler gear shaft. The gear ring is fixedly combined with the end cover one on the lower support through three rows of the rollers. The rolling ring and four rows of the rollers are fixedly combined with the end cover two and the end cover three on the upper support. The transmission box is connected to one end of the clamping cylinder through a connecting pin two. The other end of the clamping cylinder is connected to a connecting seat welded on the upper support through a connecting pin one. The clamping block is connected to the gear ring and the rolling ring through a transmission rod and a connecting pin three. During operation, the rotary drilling rig system is arranged outside the casing. The pump station drives the clamping cylinder to act through an oil pipe, driving the overall movement of the upper support. The clamping block protrudes inwards and approaches the casing until the clamping action is completed. After the clamping action is completed, the pump station drives the hydraulic motor to act through the oil pipe. Through the reducer, the force is transmitted to the gear. The gear drives the gear ring to rotate through the idler gear, finally realizing the rotation of the casing. The rotary drilling rig system controls the clamping cylinder and the hydraulic motor hydraulically to provide power for the equipment to advance; The segment connection system includes a casing crane, a casing and a casing hoisting track; the casing crane is installed on the casing hoisting track, the casing hoisting track is welded on the top of the tunnel segment. The casing includes several segments and a cutter head fixed at the front end of the segment. The segment connection system is responsible for the hoisting, transportation and subsequent splicing of the segments; The inner sleeve support system includes an inner sleeve, which comprises a cylinder and a cover plate arranged at one end of the cylinder. A sealing brush is welded to the front end of the outer periphery of the cylinder. The cover plate is provided with slurry discharge holes, slurry inlet holes and a feeding window. A circle of support shoe oil cylinder bases and rear support oil cylinder bases are welded to the outside of the cylinder. A support shoe oil cylinder is connected to the support shoe oil cylinder base, and a support oil cylinder is connected to the rear support oil cylinder base. A circle of rollers is installed outside the cylinder, and the rollers rotate synchronously with the casing. The inner sleeve support system is used to seal and prevent the leakage of sediment inside the segment. Shield tail grease is injected through the grease hole at the bottom along the sealing brush and smeared on the inner side of the segment. The support oil cylinder and the support shoe oil cylinder are hydraulically controlled to perform segment connection and stepping work. The portal joint plate sealing system includes a portal joint plate. Oil cylinder supports are welded to the outer periphery of the portal joint plate. An accumulator is installed on the rear wall of the portal joint plate, a chevron seal is installed at the front end part, three circles of sealing brushes are welded to the inner wall, and a grease hole communicating with the front sealing brush is arranged at the bottom. The portal joint plate sealing system is used to seal the gap between tunnel segments and prevent the leakage of formation water, mortar and solids. When the segment steps, shield tail grease is injected through the grease hole in the portal joint plate and smeared on the outer side of the segment to reduce the friction between the portal joint plate sealing system and the segment. The pressure maintaining system includes a pressure sensor, a PLC, an air compressor, a slurry storage tank, a safety valve, a pressure gauge, a liquid level gauge, a slurry pipe and a ball valve installed inside the inner sleeve support system. The liquid level gauge is arranged in the slurry storage tank. The pressure sensor, the air compressor and the liquid level gauge are electrically connected to the PLC through signal lines. The air compressor is connected to the slurry storage tank through an air pipe. A pressure gauge is arranged on the slurry storage tank, and a safety valve is arranged between the pressure gauge and the slurry storage tank. The slurry storage tank is communicated with the inner sleeve support system through a slurry pipe with a ball valve. The pressure sensor detects the pressure inside the inner sleeve support system and uploads the detection signal to the PLC through the signal line. When the internal pressure is lower than the predetermined limit, the PLC gives an instruction and conveys it to the air compressor through the signal line. The air compressor starts, and compressed air is injected into the slurry storage tank. The pressure gauge shows the instant air pressure at the upper part of the slurry storage tank. The liquid level gauge shows the real-time liquid level in the slurry storage tank and transmits it to the PLC. The safety valve ensures that the pressure does not exceed the limit value. The ball valve is in an open state all the time. The air pressure at the upper part presses the slurry at the lower part of the slurry storage tank into the inner cavity of the inner sleeve support system through the slurry pipe. The internal pressure of the inner sleeve support system returns to the set value. The PLC receives the signal from the pressure sensor and gives an instruction to turn off the air compressor. In this way, the feedback cycle ensures the stable pressure inside the inner sleeve support system. The described grease injection system includes a grease pump, an electrically controlled valve, a pressure sensor, and a PLC. The grease pump, the electrically controlled valve, and the pressure sensor are respectively electrically connected to the PLC. The grease injection system provides grease for the inner sleeve support system and the door opening joint plate sealing system. The grease pump is respectively connected to the grease holes of the door opening joint plate sealing system and the inner sleeve support system through a grease pipe installed with an electrically controlled valve. The pressure sensor is connected to the grease holes on the door opening joint plate sealing system and the inner sleeve support system. The signal collected by the pressure sensor is transmitted to the PLC through a signal line. When the pressure in the grease hole is insufficient, the PLC receives the signal and gives instructions to the grease pump and the electrically controlled valve respectively. The grease pump operates, the electrically controlled valve opens, and the grease is injected into the sealing brushes of the door opening joint plate sealing system and the inner sleeve support system through the drive of the grease pump. When the set pressure is reached, the grease pump stops operating and the electrically controlled valve closes. Through such feedback adjustment, the pressure in the sealing cavity is maintained stable. The hydraulic system is established on the flatbed of the support trolley system. The hydraulic system includes an oil tank, a motor, and a pump head. The bottom walking wheels of the flatbed are placed on the tunnel track and move along with the support trolley system. The oil tank is welded and fixed on the flatbed. The motor is fixed on the flatbed. The pump head is matched with the motor through a coupling. Before starting, the support trolley system moves the flatbed to a designated location. When starting, the motor is controlled to pump the hydraulic oil in the oil tank out through the oil pipe from the pump head and into the servo cylinder of the support trolley system. The servo cylinder is connected to the shoe through the two end lugs. As the servo cylinder extends, the shoe presses against the tunnel segment, realizing driving the support trolley system to support and press evenly on the inner wall of the tunnel segment in all directions. By adjusting the pressure, each shoe of the support trolley system reaches the corresponding position. After fixing the position, tunneling begins. The hydraulic system controls the servo cylinders on the rotary drilling rig system and the support trolley system, and the shoe cylinders and support cylinders on the inner sleeve support system. The pressure maintaining system conducts slurry input and discharge into the inner sleeve support system. The grease injection system injects grease into the sealing brushes in the inner sleeve support system and the door opening joint plate sealing system. The sealing brushes act on the inner and outer walls of the casing in the segment connection system. The rotary drilling rig system slides on the support trolley system and is connected to the right support lug of the support trolley system through a stepping cylinder. The door opening joint plate sealing system is connected to the support trolley system through six small cylinders. Both the inner sleeve support system and the door opening joint plate sealing system are closely attached to the tunnel segment wall. The rotary drilling rig system drives the casing to rotate and break through the segment wall. The casing crane moves on the casing hoisting track to complete the hoisting, transportation, and splicing work of the segments. The casing consists of multiple segments and a front cutter head.

2. The novel connection passage excavation device according to claim 1, wherein: It further includes a fixed anti-collapse device arranged at a position corresponding to the right-line working area, i.e., the working area on the right side of the tunnel. The fixed anti-collapse device includes a sealed steel structure, channel steel, and a support. The sealed steel structure is welded to the left side of the right-line working area, the channel steel is welded to the right side of the right-line working area, and the support is connected to the end of the channel steel and is closely attached to the right side of the right-line working area.

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