A folded line segment shield tunnel support device and a method of using the same

Abstract

The application discloses the technical field of tunnel underground works construction, and particularly relates to a stacked-line-section shield tunnel supporting equipment and a using method thereof. The stacked-line-section shield tunnel supporting equipment comprises a steel frame, a supporting device and a running device. The supporting device is connected to the steel frame, and the running device is arranged at the bottom of the steel frame. The supporting device is used for abutting against a first segment of a lower shield tunnel, and can be radially expanded and contracted along the first segment, so that the supporting device can be better abutted against the first segment. Meanwhile, the supporting device can be applied to shield tunnels with different radii due to the radial expansion and contraction of the supporting device along the first segment. The steel frame can run longitudinally along the first segment through the running device, so that the supporting equipment can run longitudinally along the lower shield tunnel. After supporting a specified position, the running device can be moved to the next specified position for supporting, so that the supporting equipment can be repeatedly used, and the construction cost is greatly reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel underground engineering construction, and in particular to a stacked-segment shield tunnel support device and a use method thereof. Background Art

[0002] More and more highway tunnels and subway tunnels are constructed using the shield method. The shield method has many advantages such as fast, safe, high-quality, environmentally friendly, and civilized construction, and has gradually become the first choice for various methods of use. The shield tunnel is composed of several ring segments, and each ring tunnel segment is generally assembled from 6 segments. When the site is limited and two shield tunnels cannot be designed side by side, they are generally designed in the form of upper and lower overlapping lines, that is, overlapping line segment shield tunnels. During construction, the lower shield tunnel is constructed first, and then the upper shield tunnel is constructed. For example, Figure 1 As shown, the upper shield tunnel 210 is located above the lower shield tunnel 220, and the lower shield tunnel 220 is composed of several first segments 10. During the shield construction process of the upper shield tunnel 210, the excavation, excavation, grouting and other operations of the shield machine 8 will cause deformation of the soil around the lower shield tunnel 220, which is bound to break the original force balance system of the lower shield tunnel 220, resulting in certain deformation of the first segment 10 structure of the lower shield tunnel 220, posing a safety and quality risk; however, the traditional method is to use a steel frame support in the lower shield tunnel 220, which is complex and bulky in design, not only consumes a large amount of materials and is complicated to install and disassemble, but also has a low reuse rate. It is a disposable device, which increases a lot of support cost investment; there is certain damage to the first segment 10 of the lower shield tunnel 220, and it cannot adapt to lower shield tunnels 220 of different radii. It has low adaptability, difficulty in installation and disassembly, low degree of automation, low work efficiency and high cost.

[0003] For example, Chinese patent CN110030005A discloses a light-weight circular support system for shield tunnels. However, when the device is used, it can only support once. When it is reused, the device needs to be dismantled and reinstalled, resulting in low reuse efficiency. At the same time, the patent is only applicable to ordinary shield tunnels. For the case of more complex stress and deformation of the segments of stacked shield tunnels, no corresponding design is made, resulting in a lack of targeting for stacked shield tunnels. Moreover, because the adjustment range of the patented device is small, it is not applicable to shield tunnels of various radii. The patent is a purely mechanical structure with a low degree of automation. The method of using the patent also has the problem of low efficiency due to the need for manual operation throughout the process. Summary of the Invention

[0004] The purpose of the present invention is to provide a support device for a stacked-segment shield tunnel and a method for using the device to address the problems that the shield segments of the lower shield tunnel are easily disturbed or deformed during the construction of the upper shield tunnel of the stacked-segment shield tunnel, and the existing support device has poor adaptability and a small adjustment range.

[0005] To achieve the above-mentioned object of the application, the application provides the following technical solutions.

[0006] The application discloses a support device for a shield tunnel of a folded line section, which comprises a steel frame, a support device and a running device.

[0007] The application discloses a support device for a shield tunnel of a folded line section, which comprises a steel frame, a support device and a running device.

[0008] Preferably, the support device comprises a plurality of support assemblies, all of which are arranged circumferentially, are connected with the steel frame, one end of the support assembly abuts on the first tube piece, and the support assembly can be radially telescoped along the first tube piece. By abutting the first tube piece through the support assembly, and by enabling the support assembly to be radially telescoped along the first tube piece, the support assembly can be better abutted with the first tube piece, and at the same time, by enabling the support assembly to be radially telescoped along the first tube piece, it can adapt to tube pieces of different diameters, so as to be applicable to shield tunnels of different diameters. Further, all of the support assemblies are arranged circumferentially, so as to abut and support the first tube piece at multiple points, and the support effect is better.

[0009] Preferably, the support assembly comprises a support steel pipe, one end of the support steel pipe is provided with a support lead screw, and the support lead screw is used to abut the first tube piece. Since the support lead screw can be elongated or shortened, when the support lead screw abuts the first tube piece, by controlling the elongation or shortening of the support lead screw, the first tube piece can be effectively supported, and the deformation control of the underlying shield tunnel can be realized, such as elongating the support lead screw to support the inner wall of the first tube piece of the underlying shield tunnel and exerting pressure, so as to effectively support the underlying shield tunnel.

[0010] Preferably, the support assembly further comprises an adjusting device, which is used to automatically adjust the telescoping amount of the support lead screw. By the adjusting device, the automatic adjustment of the support lead screw can be realized, such as when the first tube piece is deformed under pressure and the support lead screw is compressed beyond a limit value, the elongation of the support lead screw is adjusted by the adjusting device to support the first tube piece, so as to achieve the purpose of automatically controlling the deformation of the first tube piece.

[0011] Preferably, the support assembly further comprises a limiting steel pipe, which is fixed on the steel frame, and the support steel pipe passes through the limiting steel pipe and abuts the first tube piece. By providing the limiting steel pipe, the limiting effect of the support steel pipe on the first tube piece is achieved, so that the support steel pipe can better abut and support the first tube piece, and at the same time, the limiting steel pipe has the positioning effect on the support steel pipe and bears the self-gravity of the support steel pipe and the support lead screw, and transmits the self-gravity of the support steel pipe and the support lead screw to the steel frame.

[0012] Preferably, the support device further comprises an intersection connecting steel disc, one end of the support steel pipe is connected with the intersection connecting steel disc by a bolt, the other end of the support steel pipe passes through the limiting steel pipe and abuts against the first pipe piece, and the support steel pipes are uniformly and symmetrically arranged along the circumference of the intersection connecting steel disc. Since the support steel pipe passes through the limiting steel pipe and is connected with the intersection connecting steel disc by a bolt, the support steel pipe is loosened at the bolt in actual operation, so that the support steel pipe is easily pulled out of the limiting steel pipe, and the support steel pipe is easily installed and disassembled, and the support steel pipe is easily replaced when the support steel pipe is installed or damaged. Meanwhile, the limiting steel pipe is arranged to increase the support stiffness of the support steel pipe and reduce the deformation degree of the support steel pipe under pressure, so that the support steel pipe better supports the first pipe piece. The support steel pipes are uniformly and symmetrically arranged along the circumference of the intersection connecting steel disc, and the support assembly is uniformly and symmetrically arranged along the circumference of the intersection connecting steel disc, so that the pressure received by the symmetrically arranged pair of support assemblies is counteracted, the symmetrically arranged support assemblies receive the pressure of the first pipe piece and are counteracted in the process of supporting the underlying shield tunnel by the support device, the steel frame bears the pressure generated by the support device in the process of supporting the first pipe piece, the stress of the steel frame is reduced, the deformation of the support equipment is reduced, the steel consumption of the steel frame is effectively reduced, and the manufacturing cost of the support equipment is saved.

[0013] Preferably, the running device comprises wheels, sleepers and tracks, the wheels are connected to the bottom of the steel frame, the sleepers are arranged at the bottom of the first pipe piece, the tracks are longitudinally laid on the sleepers, and the electric wheels can run longitudinally along the tracks. The support equipment is brought into the underlying shield tunnel by the running device, so that the support equipment can be driven to different designated positions to effectively support the underlying shield tunnel, thereby realizing the reuse of the support equipment and greatly reducing the construction cost. Meanwhile, since the support equipment has the running capability, the support equipment is convenient to assemble and disassemble and is convenient to maintain.

[0014] Preferably, the lifting controller is further arranged at the bottom of the steel frame and can be vertically telescopic. The lifting controller arranged at the steel frame can be vertically telescopic, so that the vertical height of the support equipment is adjusted, the vertical height of the support equipment is adjusted by the lifting controller, and the support equipment is convenient to switch between the state of supporting the first pipe piece and the state of running along the first pipe piece, that is, the support equipment is convenient to switch between the supporting state and the running state.

[0015] Preferably, the steel frame comprises a plurality of longitudinally connected steel skeletons, and the support device is arranged on each side of each steel skeleton. The support device is arranged on each side of each steel skeleton, so that the first pipe piece is supported at multiple points in the longitudinal direction.

[0016] The application further discloses a method for using the stacked-line-section shield tunnel supporting device.

[0017] Step one: installing the sleepers and the track in the lower shield tunnel; determining a starting position affected by the upper shield tunnel construction on the lower shield tunnel, and laying the sleepers and the track along the tunneling direction of the upper shield tunnel from the starting position;

[0018] Step two: installing the supporting device in the lower shield tunnel; installing three supporting devices on the track, and dividing the three supporting devices into a first device, a second device and a third device according to the front-to-back order in the tunneling direction of the upper shield tunnel;

[0019] Step three: performing the initial support of the supporting device; moving the first device to the starting position in the lower shield tunnel, the distance between the adjacent two supporting devices is an integer multiple of the longitudinal length of the first pipe section of a single ring, and the first device is braked after being moved to the starting position, then the lifting controller of each supporting device is started to lift each supporting device, and the supporting device of each supporting device is started to support the first pipe section after the lifting of each supporting device is completed, thereby completing the initial support of the supporting device;

[0020] Step four: stopping the shield tunneling of the upper shield tunnel at the midpoint of the first device; under the condition of the initial support of the supporting device, the shield tunneling machine of the upper shield tunnel is stopped at the midpoint of the first device after the shield cutter head reaches the position, and a stop signal is sent;

[0021] Step five: moving the three supporting devices forward by one shield tunneling step and supporting again; after each supporting device receives the stop signal that the shield tunneling reaches the midpoint of the first device, the first device, the second device and the third device are sequentially and automatically moved by one shield tunneling step and supported again, wherein only one supporting device is moved each time, that is, only one supporting device is in the unloading state, and the other two supporting devices are in the supporting state;

[0022] Step six: cyclic tunneling and supporting; the shield tunneling machine in the upper shield tunnel is stopped after tunneling by one shield tunneling step, and the first device, the second device and the third device of the supporting device are sequentially and automatically unloaded, moved forward and supported, and the cyclic tunneling and supporting are repeated until the upper shield tunnel construction of the stacked-line-section is completed;

[0023] Step seven: removing all the supporting devices after the upper shield tunnel construction is completed, and repeating the construction for other tunnels.

[0024] The use method of the stacked segment shield tunnel supporting equipment, when the upper shield tunnel is constructed, repeatedly supports the first segment of the lower shield tunnel by using the supporting equipment, and the supporting equipment is moved in sections, so that the long distance supporting of the lower shield tunnel is completed by using the shorter supporting equipment, the safe tunneling of the upper shield tunnel is realized, the area of the lower shield tunnel affected by the upper shield tunnel is always effectively supported, the deformation or damage of the first segment of the lower shield tunnel is prevented, further, three supporting equipments are arranged in the lower shield tunnel along the tunneling direction of the upper shield tunnel, in order to improve the use efficiency and economy of the supporting equipment, the three supporting equipments are combined for use, so that the structural stability of the lower shield tunnel during the supporting and moving of the supporting equipment is increased, the three supporting equipments are respectively the first equipment, the second equipment and the third equipment, a certain distance is kept between the adjacent supporting equipments, the supporting of the lower shield tunnel by the supporting equipment and the tunneling of the upper shield tunnel by the shield tunneling machine are alternately and circularly operated, when the supporting equipment is moved, the first equipment, the second equipment and the third equipment are unloaded, moved and supported in sequence, the moving of one vehicle is realized when the two vehicles are in the supporting state, the segment of the lower shield tunnel is always in the supporting state, the stability of the lower shield tunnel is effectively maintained, the deformation of the lower shield tunnel is prevented, and the construction safety of the upper shield tunnel is ensured.

[0025] Compared with the prior art, the beneficial effects of the present application are:

[0026] 1. The stacked line segment shield tunnel supporting equipment according to the present application comprises a steel frame, a supporting device and a walking device, the supporting device is arranged on the steel frame, the walking device is connected to the bottom of the steel frame, the supporting device is used for abutting against the first segment of the underlying shield tunnel, and the supporting device can expand and contract along the radial direction of the first segment, so that the supporting device can better abut against the first segment, and meanwhile, the supporting device can be applied to shield tunnels with different radii, so that the use range of the stacked line segment shield tunnel supporting equipment according to the present application is wider, and the utilization value is higher. Further, the steel frame can walk along the longitudinal direction of the first segment through the walking device, so that the stacked line segment shield tunnel supporting equipment according to the present application can walk along the longitudinal direction of the first segment, that is, walk along the longitudinal direction of the underlying shield tunnel. Compared with the supporting structure with a fixed position in the prior art, since the stacked line segment shield tunnel supporting equipment according to the present application can walk along the longitudinal direction of the underlying shield tunnel, after supporting a specified position, the walking device can be used to move to the next specified position for supporting, so that the stacked line segment shield tunnel supporting equipment according to the present application can be reused, and the construction cost is greatly reduced. Meanwhile, since the stacked line segment shield tunnel supporting equipment according to the present application can walk along the underlying shield tunnel, the supporting equipment is very convenient to install and remove. For example, when installing, the supporting equipment is first installed at a wider position, and then the supporting equipment is driven to the specified position of the underlying shield tunnel through the walking device for supporting. After the supporting is completed, the supporting equipment is driven out of the underlying shield tunnel through the walking device. The stacked line segment shield tunnel supporting equipment according to the present application can effectively control the deformation of the underlying shield tunnel during the construction of the stacked line segment tunnel shield, and has important value for ensuring the safety of shield construction, ensuring the normal traffic capacity of the underlying shield tunnel, ensuring the structural safety of the underlying shield tunnel, and ensuring the smooth construction of surrounding projects.

[0027] 2. The use method of the stacked line segment shield tunnel supporting equipment according to the present application, when the upper shield tunnel is constructed, the first segment of the lower shield tunnel is repeatedly supported by the supporting equipment, and the supporting equipment is moved in sections, the shorter supporting equipment is used to complete the support of the long-distance stacked lower shield tunnel, the safe tunneling of the upper shield tunnel is realized, the area of the lower shield tunnel affected by the shield construction of the upper shield tunnel is always effectively supported, the deformation or damage of the first segment of the lower shield tunnel is prevented, further, in order to improve the use efficiency and economy of the supporting equipment, three supporting equipment vehicles are combined for use, so as to increase the structural stability of the lower shield tunnel when the supporting equipment is supported and moved, the three supporting equipment are arranged in the lower shield tunnel along the tunneling direction of the upper shield tunnel, the three supporting equipment are respectively a first equipment, a second equipment and a third equipment, a certain distance is kept between the adjacent supporting equipment, the supporting equipment supports the lower shield tunnel and the shield tunneling machine of the upper shield tunnel alternately and cyclically, and when the supporting equipment moves, the first equipment, the second equipment and the third equipment are unloaded, moved and supported in turn, so that another vehicle is moved when two vehicles are in the supporting state, the segment of the lower shield tunnel is always in the supporting state, the stability of the lower shield tunnel is effectively maintained, the deformation of the lower shield tunnel is prevented, and the construction safety of the upper shield tunnel is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a schematic diagram of a stacked line segment shield tunnel in the background art.

[0029] Figure 2 is a structural elevation of the supporting equipment of the present application Figure 1 .

[0030] Figure 3 is a structural elevation of the supporting equipment of the present application Figure 2 .

[0031] Figure 4 is a partial enlarged view of A of Figure 3 .

[0032] Figure 5 is a structural elevation of the supporting equipment of the present application .

[0033] Figure 6 is a structural elevation of the supporting equipment of the present application

[0034] Figure 7 is a structural side view of the supporting equipment of the present application Figure 1 .

[0035] Figure 8 is a partial enlarged view of B of Figure 7 .

[0036] Figure 9 is a structural side view of the supporting equipment of the present applicationFigure 2 .

[0037] Figure 10 It is a schematic diagram of the steel frame structure of the present invention.

[0038] Figure 11 It is a schematic diagram of the coordination between the steel frame and the supporting device.

[0039] Figure 12 This is the first construction step of the support equipment of the present invention (schematic diagram of initial support of the support equipment).

[0040] Figure 13 This is the second step of the support equipment construction of the present invention (schematic diagram of the shield tunneling to the midpoint position of the first equipment).

[0041] Figure 14 This is the third step of the support equipment construction of the present invention (schematic diagram after the support equipment moves forward a shield tunneling distance).

[0042] Markings in the figure: 1-steel frame, 11-steel skeleton, 101-vertical pole, 102-top longitudinal rod, 103-bottom longitudinal rod, 14-longitudinal connecting rod, 15-diagonal rod, 2-support device, 21-support assembly, 211-support steel pipe, 212-support screw rod, 213-limiting steel pipe, 22-intersection connecting steel disc, 3-traveling device, 32-wheel, 33-sleeper, 34-track, 4-adjustment device, 41-screw controller , 42-strain sensor, 43-displacement sensor, 5-lifting controller, 6-information transmission receiver, 7-centralized control system, 71-computer, 72-power supply, 8-shield machine, 9-shield cutter head, 10-first segment, 110-rubber pad, 120-alarm, 130-second segment, 210-upper shield tunnel, 220-lower shield tunnel, 310-first equipment, 320-second equipment, 330-third equipment. DETAILED DESCRIPTION

[0043] The present invention will be further described in detail below with reference to the examples and specific implementation methods. However, this should not be understood as limiting the scope of the present invention to the following examples, as all technologies implemented based on the present invention fall within the scope of the present invention.

[0044] Example 1

[0045] like Figures 2-7 As shown, the stacked segment shield tunnel support equipment described in this embodiment includes a steel frame 1, a support device 2 and a running device 3. The support device 2 is connected to the steel frame 1, and the running device 3 is arranged at the bottom of the steel frame 1. The support device 2 is used to abut the first pipe segment 10, and the support device 2 can be extended and retracted along the radial direction of the first pipe segment 10. The steel frame 1 can move longitudinally along the first pipe segment 10 through the running device 3.

[0046] The support device for the overlapped line segment shield tunnel provided by the embodiment comprises a steel frame 1, a support device 2 and a running device 3. The support device 2 is arranged on the steel frame 1, and the running device 3 is connected to the bottom of the steel frame 1. The support device 2 is used to abut against the first segment 10 of the lower shield tunnel 220, and the support device 2 can expand or contract along the radial direction of the first segment 10, so that the support device 2 can be better abutted against the first segment 10. At the same time, since the support device 2 can expand or contract along the radial direction of the first segment 10, the support device 2 can be applied to the first segments 10 with different radii, so that the support device 2 can adapt to the lower shield tunnel 220 with different radii, and the use range of the support device for the overlapped line segment shield tunnel provided by the embodiment is wider, and the utilization value is higher. Further, the steel frame 1 can run along the longitudinal direction of the first segment through the running device 3, so that the support device for the overlapped line segment shield tunnel provided by the embodiment can run along the longitudinal direction of the first segment 10, that is, the support device can run along the longitudinal direction of the lower shield tunnel 220. Compared with the support structure with a fixed position in the prior art, since the support device for the overlapped line segment shield tunnel provided by the embodiment can run along the longitudinal direction of the lower shield tunnel 220, after supporting a specified position, the running device 3 can run to the next specified position for supporting, so that the support device can be reused, and the construction cost is greatly reduced. At the same time, since the support device for the overlapped line segment shield tunnel provided by the embodiment can run along the lower shield tunnel 220, the installation and disassembly are very convenient. For example, when installing, the support device is installed at a wider position first, and then the support device runs to the specified position of the lower shield tunnel 220 through the running device 3 for supporting. After the supporting is completed, the support device runs out of the lower shield tunnel 220 through the running device 3. The support device for the overlapped line segment shield tunnel provided by the embodiment can effectively control the deformation of the lower shield tunnel 220 in the construction process of the overlapped line segment shield tunnel, and has important value for ensuring the safety of shield construction, ensuring the normal traffic capacity of the lower shield tunnel 220, ensuring the structural safety of the lower shield tunnel 220 and the smooth construction of the surrounding engineering.

[0047] In the present application, the longitudinal direction is along the length direction of the lower shield tunnel 220.

[0048] A preferred mode is as follows: Figure 3As shown, the support device 2 comprises a plurality of support assemblies 21, all of which are arranged circumferentially, i.e. during construction, the support assemblies 21 are placed circumferentially inside the tunnel segment, the support assemblies 21 are connected with the steel frame 1, one end of the support assemblies 21 abuts on the first segment 10, and the support assemblies 21 can expand or contract along the radial direction of the first segment 10, the first segment 10 is abutted by the support assemblies 21, and the support assemblies 21 can expand or contract along the radial direction of the first segment 10 to better abut the first segment 10, and at the same time, the support assemblies 21 can expand or contract along the radial direction of the first segment 10 to adapt to segments of different diameters, thereby being applicable to shield tunnels of different diameters, further, all of the support assemblies 21 are arranged circumferentially, thereby being able to abut and support the first segment 10 at multiple points, and the support effect is better

[0049] As shown in Figure 3 each support device 2 is composed of a plurality of support assemblies 21 located on the same cross section, each support assembly 21 abuts on the first segment 10, thereby supporting the first segment 10 at multiple points in the circumferential direction, further, each support device 2 comprises 12 support assemblies 21, of which, 3 support assemblies 21 are connected at the top of the steel frame 1, 3 support assemblies 21 are connected on each side of the steel frame 1, of which, the support assemblies 21 arranged on the two side surfaces of the steel frame 1 are symmetrically arranged, and 3 support assemblies 21 are connected at the bottom of the steel frame 1, by arranging a plurality of support assemblies 21 circumferentially on the steel frame 1, it is ensured that the first segment 10 can be stably supported, and the support device 2 will not rotate on the cross section, thereby enhancing the stability of the first segment 10.

[0050] A preferred mode, as shown in Figure 3 the support assembly 21 comprises a support steel pipe 211, one end of the support steel pipe 211 is provided with a support lead screw 212, and the support lead screw 212 is used to abut on the first segment 10. Since the support lead screw 212 can be elongated or shortened, when the support lead screw 212 abuts on the first segment 10, the elongation or shortening of the support lead screw 212 is controlled to effectively support the first segment 10, thereby achieving deformation control of the underlying shield tunnel 220, such as elongating the support lead screw 212 to support the inner wall of the first segment 10 of the underlying shield tunnel 220 and exerting pressure, thereby effectively supporting the underlying shield tunnel 220.

[0051] A preferred mode, as shown in Figures 3-4As shown, the support assembly 21 further comprises an adjusting device 4, which is arranged at the support lead screw 212 and is used to automatically adjust the extension of the support lead screw 212, so as to automatically adjust the support lead screw 212 through the adjusting device 4, for example, when the first pipe piece 10 is deformed under pressure and the support lead screw 212 is compressed beyond a limit value, the support lead screw 212 is automatically adjusted to extend through the adjusting device 4, so as to support the first pipe piece 10, thereby achieving the purpose of automatically controlling the deformation of the first pipe piece 10.

[0052] As shown in the drawings, Figure 4 The adjusting device 4 comprises a lead screw controller 41, a strain sensor 42 and a displacement sensor 43, wherein the lead screw controller 41 is composed of a microcomputer for information processing and control, and is arranged in the support steel pipe 211; the strain sensor 42 is installed on the support lead screw 212, and is used to monitor the strain information of the support lead screw 212 and transmit the monitored strain information to the lead screw controller 41, so that the lead screw controller 41 calculates the pressure borne by the support lead screw 212 according to the strain information, and judges whether the pressure exceeds an alarm value of the bearing capacity of the support lead screw 212, and sends an alarm signal when the alarm value is exceeded; the displacement sensor 43 is installed on the support lead screw 212 near the top of the first pipe piece 10, and is used to monitor the displacement information of the support lead screw 212 and transmit the displacement information to the lead screw controller 41, so that when the displacement is greater than a set limit value, i.e., when the compression value of the support lead screw 212 exceeds the limit value, the lead screw controller 41 automatically adjusts the extension of the support lead screw 212 according to the displacement information, so as to effectively support the first pipe piece 10 and realize the deformation control of the underlying shield tunnel 220.

[0053] In a preferred mode, the support lead screw 212 is an electric lead screw, one end of which is connected to the top of the support steel pipe 211, and the electric lead screw controls the extension or shortening of the lead screw through its own starting motor, so that when the lead screw extends, it can support the inner wall of the first pipe piece 10 of the underlying shield tunnel 220 and apply pressure, thereby supporting the underlying shield tunnel, and if necessary, the position of the first pipe piece 10 of the underlying shield tunnel 220 can be finely adjusted.

[0054] In a preferred mode, as shown in the drawings, Figure 4 Each end surface of the support lead screw 212 in contact with the first pipe piece 10 is provided with a rubber pad 110, which plays a role in dispersing stress and protecting the lead screw of the support lead screw 212 and the first pipe piece 10.

[0055] In a preferred mode, as shown in the drawings, Figure 3As shown, the support assembly 21 further comprises a limiting steel pipe 213 fixed on the steel frame 1, and the support steel pipe 211 passes through the limiting steel pipe 213 and abuts against the first pipe piece 10. The limiting steel pipe 213 is arranged to limit the support steel pipe 211. Since the support steel pipe 211 passes through the limiting steel pipe 213, the support steel pipe 211 cannot rotate, but can only compress or elongate along the axial direction of the limiting steel pipe 213, so that the support steel pipe 211 better abuts against and supports the first pipe piece 10. Meanwhile, the limiting steel pipe 213 positions the support steel pipe 211 and bears the self-gravity of the support steel pipe 211 and the support lead screw 212, and transmits the self-gravity of the support steel pipe 211 and the support lead screw 212 to the steel frame 1.

[0056] As shown in Figure 6 , the limiting steel pipe 213 is connected to and fixed on the steel frame 1 by bolts. The limiting steel pipe 213 is located at the top and bottom of the steel frame 1 and on the two side surfaces of the steel frame 1.

[0057] As shown in Figure 3 , Figure 5 , the support device 2 further comprises a cross-point connecting steel disc 22. One end of the support steel pipe 211 is connected to the cross-point connecting steel disc 22 by a pin, and the other end of the support steel pipe 211 passes through the limiting steel pipe 213 and abuts against the first pipe piece 10. The support steel pipe 211 is uniformly and symmetrically arranged along the circumferential direction of the cross-point connecting steel disc 22. Since the support steel pipe 211 passes through the limiting steel pipe 213 and is connected to the cross-point connecting steel disc 22 by the pin, the support steel pipe 211 can be easily pulled out of the limiting steel pipe 213 by loosening the pin in the actual operation process, so that the support steel pipe 211 can be easily installed and disassembled. When the support steel pipe 211 needs to be replaced due to installation or damage, it is extremely convenient. Meanwhile, the limiting steel pipe 213 can increase the support stiffness of the support steel pipe 211 and reduce the deformation degree of the support steel pipe 211 under pressure, so that the support steel pipe 211 can better support the first pipe piece 10.

[0058] And the support steel pipe 211 is arranged along the circumferential direction of the intersection connecting steel disc 22 uniformly and symmetrically, one end of the support steel pipe 211 is connected with the intersection connecting steel disc 22 by means of a bolt, the other end of the support steel pipe 211 passes through the limiting steel pipe 213 and abuts against the first pipe piece 10, and the support steel pipe 211 is arranged along the circumferential direction of the intersection connecting steel disc 22 uniformly and symmetrically, that is, the support assembly 21 is arranged along the circumferential direction of the intersection connecting steel disc 22 uniformly and symmetrically, so that the pressure borne by the symmetrically arranged pair of support assemblies 21 is counteracted, the support device 2 is in the process of supporting the lower shield tunnel 220, the pressure borne by the symmetrically arranged support assemblies 21 is counteracted, the pressure borne by the steel frame 1 in the process of supporting the first pipe piece 10 by the support device 2 is reduced, the stress borne by the steel frame 1 is reduced, thereby reducing the deformation of the support device, and further effectively reducing the steel consumption of the steel frame 1 and saving the manufacturing cost of the support device.

[0059] As shown in Figure 3 , the center of the intersection connecting steel disc 22 coincides with the intersection point of the support assembly 21 on the support device 2, and bears the pressure transmitted by the support assembly 21; the end of the support steel pipe 211 away from the first pipe piece 10 is connected with the intersection connecting steel disc 22 by means of a bolt, and the other end of the support steel pipe 211 is connected with the support lead screw 212 after passing through the limiting steel pipe 213, wherein the intersection connecting steel disc 22 is provided with a plurality of protrusions on the side surface in the circumferential direction, the number of protrusions corresponds to the number of support steel pipes 211, the protrusions are inserted into the end of the support steel pipe 211, that is, the support steel pipe 211 is sleeved on the protrusions of the intersection connecting steel disc 22, thereby realizing the bolt connection of the support steel pipe 211 and the intersection connecting steel disc 22.

[0060] As shown in Figure 5 , in the actual construction process, a plurality of support assemblies 21 on each cross section are arranged radially and uniformly and symmetrically, one end of each support assembly 21 intersects the intersection connecting steel disc 22, and the other end of each support assembly 21 is in contact with the first pipe piece 10 as a fulcrum, the fulcrum is arranged along the circumferential direction of the first pipe piece 10, so that the support assembly 21 is arranged symmetrically around the center, thereby counteracting the pressure borne by the symmetrically arranged pair of support assemblies 21, counteracting the pressure borne by the support device 2 in the process of supporting the first pipe piece 10, further realizing that the steel frame 1 does not bear the pressure generated by the support device 2 in the process of supporting the first pipe piece 10, and further, the included angle between adjacent support assemblies 21 is θ, when the total number of support assemblies 21 is 12, the included angle between adjacent support assemblies 21 is 30°.

[0061] A preferred mode, as shown in Figures 7-8 , the running device 3 includes wheels 32, sleepers 33 and tracks 34, the wheels 32 are connected at the bottom of the steel frame 1, as shown in Figure 6The sleeper 33 is arranged at the bottom of the first pipe piece 10, as shown in Figure 5 The track 34 is longitudinally arranged on the sleeper 33, as shown in Figure 5 The wheel 32 can run longitudinally along the track 34. The support device is brought to walk in the underlying shield tunnel 220 by the walking device 3, so that the support device can run to different designated positions to effectively support the underlying shield tunnel 220, thereby realizing the reuse of the support device, greatly reducing the construction cost, and at the same time, since the support device has the walking ability, it is also convenient for the installation and disassembly of the support device and the subsequent maintenance.

[0062] The sleeper 33 is horizontally placed on the bottom of the underlying shield tunnel 220, i.e. the bottom of the first pipe piece 10, and the track 34 is longitudinally arranged in two parallel rows on the sleeper 33. The track 34 is connected to the sleeper 33 by bolts. The contact part between the sleeper 33 and the first pipe piece 10 is provided with a buffer point for protection, so as to prevent the sleeper 33 from damaging the first pipe piece 10. The wheel 32 is symmetrically arranged at the bottom of the steel frame 1 on both sides, and two rows of wheels 32 are arranged on one steel frame 1. 2-4 wheels are arranged on one side, which are connected to the steel frame 1 by bolts, and the wheels 32 are placed on the track 34 to bear the weight of the whole support device. The rotation of the wheel 32 drives the support device to move on the track 34.

[0063] The track 34 is arranged symmetrically on both sides of the vertical line passing through the center of the underlying shield tunnel 220, so that the intersection point of the support device on the track 34 and the center of the steel disc 22 are located on the vertical line passing through the center of the underlying shield tunnel 220. The difference in height between the top surface of the track 34 and the center of the intersection point of the steel disc 22 is h, the difference in height between the top surface of the track 34 and the center of the underlying shield tunnel 220 is H, and the difference in height between the center of the intersection point of the steel disc 22 and the center of the underlying shield tunnel 220 is h1=H-h. h1 is greater than 0, and h1 is preferably 5 cm.

[0064] In this application, the spatial positions of the support device 2 and the walking device 3 do not intersect.

[0065] A preferred mode, as shown in Figure 8 The lifting controller 5 is connected to the bottom of the steel frame 1, and the lifting controller 5 can be vertically extended and retracted. By arranging the lifting controller 5 which can be vertically extended and retracted on the steel frame 1, the vertical height of the support device can be adjusted. The vertical height of the support device is adjusted by the lifting controller 5, which is convenient for the conversion between the support device in the support state and the walking state.

[0066] Among them, the lifting controller 5 causes the supporting equipment to be vertically lifted to a certain height, which is the height difference h1 between the center of the steel disc 22 connected at the intersection and the center of the shield tunnel 220 below. The center of the steel disc 22 connected at the intersection coincides with the center of the shield tunnel 220 below, completing the centering; before each supporting device moves forward after the support is completed, the lifting controller 5 is used to first lower the supporting device to a certain height, which is the height difference h1 between the center of the steel disc 22 connected at the intersection and the center of the shield tunnel, so that the supporting device is vertically lowered, so that the wheel 32 contacts the track 34 and bears the entire weight of the supporting device, and then the wheel 32 is started, and the supporting device is used to travel a predetermined distance and then stop before the next support is performed.

[0067] A preferred method, such as Figure 10 As shown, the lifting controller 5 is vertically installed at the bottom of the steel frame 1. The lifting or lowering of the supporting equipment is achieved by the vertical extension and contraction of the lifting controller 5. The lifting controller 5 is symmetrically installed at the bottom of both sides of the steel frame 1. Two rows of lifting controllers 5 are set for one supporting equipment. 3 to 6 lifting controllers are preferably used on one side. Figure 10 One is set at each end and several are set in the middle, and the lifting controller 5 is connected to the steel frame 1 with bolts, wherein the lifting controller 5 is an electric screw. When the lifting controller 5 is extended, it is supported on the top surface of the track 34 and bears the weight of the entire supporting equipment. The screw of the lifting controller 5 is extended synchronously to realize the lifting of the supporting equipment, so that the center of the steel disc 22 connected at the intersection coincides with the center of the shield tunnel 220 below.

[0068] A preferred method, such as Figure 9 As shown, it also includes an alarm 120, which is installed inside the steel frame 1. The alarm 120 is used to receive the monitoring information of the adjustment device 4 and respond. For example, the screw controller 41 calculates the pressure on the support screw 212 based on the strain information, and determines whether the pressure exceeds the bearing capacity alarm value of the support screw 212. When the alarm value is exceeded, an alarm signal is issued. Then, the alarm 120 receives the alarm signal and starts to alarm.

[0069] A preferred method, such as Figure 9 As shown, it also includes an information transmission receiver 6 and a centralized control system 7. The information transmission receiver 6 and the centralized control system 7 are installed inside the steel frame 1. The information transmission receiver 6 is responsible for transmitting and receiving shield displacement and support equipment operation information, can receive wireless and limited signals, and transmit the information to the centralized control system 7.

[0070] Among them, such as Figure 9As shown, the centralized control system 7 includes a computer 71 and a power supply 72, the computer 71 is used to compile and execute control programs, receive signals of the support device 2, the walking device 3, the lifting controller 5, process data, control the automatic control of each device, such as controlling the screw rod controller 41 of the adjusting device 4, thereby controlling the extension of the support screw rod 212, such as controlling the rotation and steering of the wheels 32 of the walking device 3, so that the support equipment moves to the next designated support, such as controlling the vertical extension of the lifting controller 5, etc. Operation and use, the power supply 72 is used to provide the required power for the support device 2, the walking device 3, the adjusting device 4, the lifting controller 5 and the information transmission receiver 6, etc. Further, the control panel is also provided on the computer 71, which is used to manually control the operation of each device.

[0071] Embodiment 2

[0072] As shown in Figure 7 , Figure 10 , based on embodiment 1, the steel frame 1 of the overlapping line segment shield tunnel support equipment described in this embodiment includes a plurality of longitudinally connected steel skeletons 11, each steel skeleton 11 is provided with a support device 2 on the side, and each steel skeleton 11 is provided with a support device 2 on the side, thereby supporting the first segment 10 in the longitudinal direction. Multi-point, wherein a plurality of steel skeletons 11 are longitudinally connected side by side, the support assembly 21 of each support device 2 is located on the side of the steel skeleton and corresponds one by one, realizing the support of the first segment 10 of the underlying shield tunnel 220, the distance between adjacent support devices 2 is the length of each ring of the first segment 10, so that each support device 2 can support one ring of the first segment 10.

[0073] As shown in Figure 10 , the adjacent steel skeletons 11 are connected by longitudinal connecting rods 14, the longitudinal connecting rods 14 are connected to the top and bottom of the steel skeleton 11, further, the inclined rods 15 are also provided between the adjacent steel skeletons 11, the two inclined rods 15 are hinged together to form a scissors support; a plurality of steel skeletons 11 are longitudinally connected side by side, connected by longitudinal connecting rods 14 and inclined rods 15, to form a steel frame 1.

[0074] A preferred mode, as shown in Figure 6 , the steel skeleton 11 includes two side vertical rods 101, a top longitudinal rod 102 and a bottom longitudinal rod 103, the two side vertical rods 101, the top longitudinal rod 102 and the bottom longitudinal rod 103 form a rectangular steel skeleton 11.

[0075] As shown in Figure 5 , when the support device 2 is connected with the steel frame 1, the limiting steel pipe 213 is connected and fixed with the steel skeleton 11 of the steel frame 1 by bolts, and the limiting steel pipe 213 is located on the vertical rod 101, the top longitudinal rod 102 and the bottom longitudinal rod 103 of the steel skeleton 11, such asFigure 3 As shown, the support assembly 21 is fixed on the steel framework 11 through the limiting steel pipe 213.

[0076] As shown, the running device 3 is connected with the steel frame 1, and the wheels 32 are symmetrically installed on the longitudinal horizontal rods 14 at the bottom of the steel frame 1 or on the vertical rods 101 at the bottom of the steel frame 1. Figures 7-8

[0077] As shown, the lifting controller 5 is connected with the steel frame 1, and the lifting controller 5 is installed on the longitudinal horizontal rods 14 at the bottom of the steel frame 1 or on the vertical rods 101 at the bottom of the steel frame 1. Figure 8 Embodiment 3

[0078] As shown, the embodiment also discloses a use method of the support equipment for the overlapped segment shield tunnel, which comprises the support equipment for the overlapped segment shield tunnel as described in the embodiment 1 or the embodiment 2 and further comprises the following steps.

[0079] Figures 2-14 Step one: installing the sleeper 33 and the track 34 in the lower shield tunnel 220, as shown, first calculating or evaluating to determine the starting position of the influence on the lower shield tunnel 220 during the construction of the upper shield tunnel 210, laying the sleeper 33 and the track 34 from the starting position to the front and laying the track 34 not less than the length of the support equipment to the rear for the initial installation and debugging of the support equipment, wherein the front refers to the tunneling direction of the upper shield tunnel 210, and the rear refers to the direction opposite to the tunneling direction of the upper shield tunnel 210.

[0080] Step one: installing the sleeper 33 and the track 34 in the lower shield tunnel 220, as shown, first calculating or evaluating to determine the starting position of the influence on the lower shield tunnel 220 during the construction of the upper shield tunnel 210, laying the sleeper 33 and the track 34 from the starting position to the front and laying the track 34 not less than the length of the support equipment to the rear for the initial installation and debugging of the support equipment, wherein the front refers to the tunneling direction of the upper shield tunnel 210, and the rear refers to the direction opposite to the tunneling direction of the upper shield tunnel 210. Figure 7 As shown, the sleeper 33 and the track 34 are laid on the first segment 10 at the bottom of the lower shield tunnel 220, and the track 34 is arranged in two parallel lines with the same elevation on the same cross section, and the installation is stable.

[0081] Figure 5 As shown, the sleeper 33 and the track 34 are laid on the first segment 10 at the bottom of the lower shield tunnel 220, and the track 34 is arranged in two parallel lines with the same elevation on the same cross section, and the installation is stable.

[0082] As shown, the sleeper 33 and the track 34 are laid on the first segment 10 at the bottom of the lower shield tunnel 220, and the track 34 is arranged in two parallel lines with the same elevation on the same cross section, and the installation is stable.

[0083] ​​​Further, the rails 34 are symmetrically arranged on both sides of the vertical line passing through the center of the lower shield tunnel 220, the intersection connecting steel disc 22 of the support equipment arranged on the rails 34 is located on the vertical line passing through the center of the lower shield tunnel 220, the top surface of the rail 34 and the center of the intersection connecting steel disc 22 have a height difference h, the top surface of the rail 34 and the center of the lower shield tunnel 220 have a height difference H, the height difference h1 between the center of the intersection connecting steel disc 22 and the center of the lower shield tunnel 220 is h1 = H - h, h1 is greater than 0, and h1 can be set to 5 cm.

[0084] Step two: installing the support equipment in the lower shield tunnel 220, as shown in Figure 12 Each component of the support equipment is manufactured in a factory or manufacturer and transported to the initial support position of the support equipment in the lower shield tunnel 220, three support equipment are installed on the rails 34, and the support equipment is divided into the first equipment 310, the second equipment 320, and the third equipment 330 in the front-to-back order of the tunneling direction of the upper shield tunnel 210.

[0085] Further, the support equipment is debugged after being assembled, and each system is in a normal working state through debugging.

[0086] As shown in Figures 7-8 After the support equipment is debugged, the support screw rod 212 of the support assembly 21 is in a retracted state, the lifting controller 5 is in a retracted state, and the support equipment is supported on the rails 34 by the wheels 32.

[0087] Step three: performing initial support of the support equipment, as shown in Figure 12 The front end of the first equipment 310 is moved to the starting position of the upper shield tunnel 210 construction affecting the lower shield tunnel 220 by manual control, the net distance between the three support equipment, i.e., the first equipment 310, the second equipment 320, and the third equipment 330, is determined according to analysis and evaluation, the net distance between adjacent two support equipment is an integer multiple of the longitudinal length of the single-ring first segment 10, and the first equipment 310 is braked after being moved to the position.

[0088] Wherein, as shown in Figure 12As shown, the net distance between the first device 310 and the second device 320 and the net distance between the second device 320 and the third device 330 can be equal or not equal. When the net distance of the adjacent support devices is 1 times the longitudinal length of the single-ring first pipe piece 10, the support devices can achieve full support of the first pipe piece 10 because the distance between the support devices on the support device is 1 times the longitudinal length of the single-ring first pipe piece 10. When the net distance of the adjacent support devices is 2-4 times the longitudinal length of the single-ring first pipe piece 10, the support devices can achieve support at a distance of 2-4 rings of the first pipe piece 10. In the later circulation of the support devices, the net distance of the adjacent support devices can be adjusted as needed.

[0089] Further, when the support device is initially supported, the lifting controller 5 of each support device is started to lift each support device to a predetermined height h1 (set as a constant value, such as 5 cm), so that the center of the intersection connecting steel disc 22 is coincident with the center of the lower shield tunnel 220.

[0090] After the support device is lifted, the support wire rod 212 of the support device 2 is started to extend, the front end of the support wire rod 212 contacts and tightly presses the first pipe piece 10, the support wire rod 212 contacts the first pipe piece 10 and a certain support force is applied, and the support force can be set to 0.1 kN. When the support force is reached, the extension of the support wire rod 212 is stopped, and the initial support of the support device is completed.

[0091] After the initial support is completed, the wire rod controller 41, the strain sensor 42, the displacement sensor 43 and the alarm 120 of the adjusting device 4 start to work. When the upper shield tunnel 210 shield tunneling construction causes the first pipe piece 10 of the lower shield tunnel 220 to deform, the support wire rod 212 of the support device 2 is compressed due to the increase of the stress, the displacement sensor 43 transmits the deformation information of the first pipe piece 10 to the wire rod controller 41, the wire rod controller 41 automatically adjusts the support wire rod 212 according to the strain information, the support wire rod 212 is elongated and a greater support force is applied to the first pipe piece 10 to offset the deformation of the first pipe piece 10, until the strain information is zero, and the automatic adjustment is continuously performed until the upper shield tunnel 210 shield tunneling reaches the next support position of the support device.

[0092] Step four: as shown in Figure 13 After the upper shield tunnel 210 shield tunneling reaches the midpoint of the first device 310, the shield machine 8 of the upper shield tunnel 210 stops and sends a stop signal under the condition of initial support of the support device.

[0093] Step five: asFigure 14 As shown, the three support devices are moved forward by one shield tunneling step and then supported again: after each support device receives a stop signal that the shield tunneling reaches the midpoint of the first device 310, the first device 310, the second device 320, and the third device 330 are sequentially and automatically moved forward by one shield tunneling step and supported, wherein only one support device is moved each time, i.e., only one support device is in the unloading state and the other two support devices are in the supporting state, effectively preventing the deformation of the first segment 10 of the lower shield tunnel 220.

[0094] In the present embodiment, the length of one shield tunneling step is preferably defined as the distance between the longitudinal center position of the second device 320 and the longitudinal center position of the first device 310, i.e., the shield tunneling step is equal to 0.5 times the sum of the lengths of the first device 310 and the second device 320 plus the clear distance between the first device 310 and the second device 320;

[0095] Further, the specific support device moving and supporting steps are as follows:

[0096] 1) Unloading, moving forward, and supporting of the first device 310; the support wire rod 212 of the support device 2 is retracted to complete unloading; the lifting controller 5 is retracted to make the wheels 32 of the support device fall on the track 34; the wheels 32 are moved forward by one shield tunneling step; the lifting controller 5 is elongated to lift the support device to a predetermined height h1, so that the center of the intersection steel disc 22 coincides with the center of the lower shield tunnel 220; the support wire rod 212 of the support device 2 is elongated, the front end of the support wire rod 212 contacts and tightly presses the first segment 10 of the lower shield tunnel 220, so that the support wire rod 212 contacts the first segment 10 and preloads a certain supporting force, which can be set to 0.1 kN, to complete the support of the first device 310;

[0097] 2) Unloading, moving forward, and supporting of the second device 320; after the second device 320 is unloaded, it is moved forward by one shield tunneling step, and the midpoint of the second device 320 is located below the shield machine 8 in the upper shield tunnel 210, specifically below the shield cutterhead 9 of the shield machine 8, and the other operation steps and methods are the same as those of the first device 310;

[0098] 3) Unloading, moving forward, and supporting of the third device 330; after the third device 320 is unloaded, it is moved forward by one shield tunneling step, and the third device 320 reaches the rear of the shield machine 8 in the upper shield tunnel 210, specifically the third device 320 reaches the lower side of the second segment 130 of the upper shield tunnel 210, preventing the installation of the second segment 120 of the upper shield tunnel 210 and the post-grouting operation of the second segment 130 from causing extrusion deformation of the first segment 10 of the lower shield tunnel 220, and the other operation steps and methods are the same as those of the first device.

[0099] Step six: cycle of tunneling and supporting: the shield machine 8 in the upper shield tunnel 210 stops after tunneling a shield tunneling step, and the first device 310, the second device 320, and the third device 330 of the supporting equipment unload, move forward, and support in turn, thus cycling tunneling and supporting until the upper shield tunnel 210 is completed.

[0100] Step seven: after the upper shield tunnel 210 is completed, the supporting equipment is removed, and the process is repeated for other tunnel construction.

[0101] A preferred way is that during the shield construction of the upper shield tunnel 210, when the pressure on the supporting lead screw 212 of the supporting device 2 decreases, the program can automatically adjust the pressure and the supporting state. During the shield construction of the upper shield tunnel 210, the pressure on the supporting lead screw 212 of the supporting device 2 may increase or decrease. When the pressure on the supporting device 2 exceeds the warning value, an alarm will be automatically sent, and the staff can check the supporting equipment and adjust the parameters of the construction of the shield machine 8 in the upper shield tunnel 210 to reduce the stress and deformation of the first segment 10 of the lower shield tunnel 220 caused by the shield construction of the upper shield tunnel 210.

[0102] A preferred way is to adjust the net distance between the three supporting equipment or adjust the parking position of the shield machine 8 above the first device 310, i.e., adjust the shield tunneling step, to reduce the pressure on the supporting lead screw 212 of the supporting device 2 and ensure that the first segment 10 does not deform. When the pressure on the supporting device 2 is small, the net distance between the three supporting equipment can be adjusted or the parking position of the shield machine above the first device can be adjusted forward, i.e., the shield tunneling step can be adjusted, to achieve rapid construction, reduce the pressure on the supporting device 2, and reduce the number of supporting equipment movements.

[0103] A preferred way is to control the automatic control of each device through the computer 71 of the centralized control system 7, such as controlling the lead screw controller 41 of the adjusting device 4 to control the extension and retraction of the supporting lead screw 212, such as controlling the rotation and steering of the wheels 32 of the walking device 3 to move the supporting equipment to the next designated supporting position, such as controlling the vertical extension of the lifting controller 5, to realize the automatic control of the cycle operation steps of steps four to six, and to realize automatic operation. At the same time, the control panel of the computer 71 can also be used to manually control the operation of each system, which is convenient for manual control of the operation of the supporting equipment.

[0104] The finite element analysis FLAC3D is used to analyze the construction process of the overlapped line segment shield tunnel, and it is concluded that the main influence range of the upper shield tunnel construction on the lower shield tunnel is about 4.5 m away from the open cut face, so that the design length and spacing of the support equipment suitable for the overlapped line segment shield tunnel are obtained, and the overlapped line segment of the support equipment is designed according to the deformation influence analysis result, so that the applicability of the support equipment in the overlapped line segment shield tunnel is enhanced; the conventional support rod is changed into a distributed automatic adjustable screw rod, the adjustable range is greatly increased, and the support rod is suitable for various radius tunnels; the strain sensor is used to accurately control the support system, so that the support system can automatically move and support along with the shield excavation process, and the automation degree is enhanced.

[0105] The above merely describes preferred embodiments of the present application and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A stacked segment shield tunnel support device, characterized in that: It comprises a steel frame (1), a supporting device (2) and a running device (3), wherein the supporting device (2) is connected to the steel frame (1), the running device (3) is arranged at the bottom of the steel frame (1), the supporting device (2) is used to abut against the first pipe segment (10), and the supporting device (2) can be extended and retracted along the radial direction of the first pipe segment (10), and the steel frame (1) can move longitudinally along the first pipe segment (10) through the running device (3); The support device (2) includes a plurality of support assemblies (21), all of the support assemblies (21) are arranged circumferentially, the support assemblies (21) are connected to the steel frame (1), one end of the support assembly (21) abuts against the first pipe segment (10), and the support assembly (21) can be extended and retracted along the radial direction of the first pipe segment (10); The support assembly (21) comprises a support steel pipe (211), one end of the support steel pipe (211) is provided with a support screw rod (212), and the support screw rod (212) is used to abut against the first pipe segment (10); The support assembly (21) further includes a limiting steel pipe (213), the limiting steel pipe (213) being fixed on the steel frame (1), and the supporting steel pipe (211) passing through the limiting steel pipe (213) and abutting against the first pipe segment (10); The support device (2) further includes an intersection connection steel disc (22), one end of the support steel pipe (211) is connected to the intersection connection steel disc (22) by a pin, the other end of the support steel pipe (211) passes through the limiting steel pipe (213) and abuts against the first pipe segment (10), and the support steel pipe (211) is evenly and symmetrically arranged along the circumference of the intersection connection steel disc (22); One end of each support assembly (21) intersects at the intersection point to connect the steel disc (22), and the contact point between the other end of each support assembly (21) and the first pipe segment (10) serves as a fulcrum. The fulcrums are arranged circumferentially along the first pipe segment (10), so that the support assemblies (21) are arranged in a centrally symmetrical manner. The support assembly (21) further includes an adjustment device (4), wherein the adjustment device (4) is used to automatically adjust the extension and contraction amount of the support screw rod (212); The regulating device (4) comprises a screw controller (41), a strain sensor (42), and a displacement sensor (43); the screw controller (41) performs information processing and control and is arranged inside the supporting steel pipe (211); The strain sensor (42) is mounted on the support screw (212), and the strain sensor (42) is used to monitor strain information of the support screw (212) and transmit the monitored strain information to the screw controller (41); The displacement sensor (43) is installed on the top of the support screw rod (212) close to the first pipe segment (10), and the displacement sensor (43) is used to monitor the displacement information of the support screw rod (212) and transmit the displacement information to the screw rod controller (41).

2. The stacked segment shield tunnel support device according to claim 1, characterized in that: The running device (3) includes wheels (32), sleepers (33) and tracks (34), wherein the wheels (32) are connected to the bottom of the steel frame (1), the sleepers (33) are arranged at the bottom of the first pipe segment (10), and the tracks (34) are longitudinally laid on the sleepers (33), and the wheels (32) can travel longitudinally along the tracks (34).

3. The stacked segment shield tunnel support device according to claim 2, characterized in that: It also includes a lifting controller (5), which is connected to the bottom of the steel frame (1) and can be vertically extended and retracted.

4. The stacked segment shield tunnel support device according to claim 3, characterized in that: The steel frame (1) comprises a plurality of longitudinally connected steel skeletons (11), and the supporting device (2) is provided on the side of each of the steel skeletons (11).

5. A method for using a stacked segment shield tunnel support device, characterized in that: Using the stacked segment shield tunnel support device as claimed in claim 3 further comprises the following steps: Step 1: Installing the sleepers (33) and the track (34) in the lower shield tunnel (220): first determine a starting position where the upper shield tunnel (210) affects the lower shield tunnel (220) during construction, and then lay the sleepers (33) and the track (34) from the starting position along the excavation direction of the upper shield tunnel (210); Step 2: Installing the support equipment in the lower shield tunnel (220): Installing three support equipment on the track (34), and dividing the three support equipment into a first device (310), a second device (320), and a third device (330) in a front-to-back order in the excavation direction of the upper shield tunnel (210); Step 3: Performing initial support of the supporting device: moving the first device (310) to the starting position in the shield tunnel (220) below, the net distance between two adjacent supporting devices is an integer multiple of the longitudinal length of the single-ring first pipe segment (10), the first device (310) is braked after moving to the starting position, and then the lifting controller (5) of each supporting device is started to lift each supporting device, and after each supporting device is lifted, the supporting device (2) of each supporting device is started to support the first pipe segment (10), completing the initial support of the supporting device; Step 4: The shield machine (8) of the upper shield tunnel (210) stops after it advances to the middle point of the first device (310): under the condition of the initial support of the support device, the shield machine (8) of the upper shield tunnel (210) advances until the shield cutter head (9) reaches the middle position of the first device (310), and stops, and sends a stop signal; Step 5: Move the three supporting devices forward by one shield tunneling distance and then support again: after each supporting device receives a stop signal when the shield tunneling reaches the midpoint of the first device (310), it automatically completes the first device (310), the second device (320) and the third device (330) moving one shield tunneling distance and completing the support again, wherein only one supporting device is moved at a time, that is, only one supporting device is in an unloading state at a time, and the other two supporting devices are in a supporting state; Step 6: cyclic excavation and support: the shield machine (8) in the upper shield tunnel (210) excavates a shield excavation distance and then stops, and the first device (310), the second device (320) and the third device (330) of the supporting device are unloaded, moved forward, and supported in sequence, and the excavation and support are cyclically carried out until the construction of the upper shield tunnel (210) of the overlapped line segment is completed; Step 7: After the construction of the upper shield tunnel (210) is completed, all the supporting equipment is removed and reused for other tunnel construction.

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