Tunnel steel frame supporting device for crushed zone

Abstract

The utility model discloses a broken zone tunnel steel frame supporting device which comprises a long beam section, transverse adjusting mechanisms are vertically and symmetrically arranged on the two sides of the bottom of the long beam section respectively, a height adjusting mechanism is arranged at the bottom of each transverse adjusting mechanism, and a base moving mechanism is arranged at the bottom of each height adjusting mechanism. A plurality of supporting mechanisms are arranged at the top of the long beam section, and a steel frame is arranged at the tops of the supporting mechanisms. The steel frame can be quickly spliced and placed, the support-free time after tunnel blasting is shortened, and the situation that surrounding rock is excessively deformed and collapses when the tunnel passes through a fracture zone is prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field of tunnel support, and in particular relates to a steel frame support device for a broken zone tunnel. Background Art

[0002] Central Asia is located at the junction of the Indian Plate, the Eurasian Plate and the Pacific Plate, due to its unique geographical location. At the same time, as the world is in an active earthquake period, it is one of the most seismically active regions in the world. Earthquakes are frequent, strong, widely distributed and shallow in source. In addition, most of the regions are developing countries with dense populations and low earthquake resistance of buildings. Therefore, earthquake disasters are the most severe in the world.

[0003] In recent years, with the advancement of the western development, a large number of tunnels under construction or planned to be built are located in areas prone to high-intensity earthquakes. In this period of global active earthquakes and the complex engineering geological environment in Central Asia, considering the construction of tunnels in high-intensity earthquake areas, especially tunnels in broken zones, is an issue that must be faced in current engineering construction.

[0004] In view of the above situation, the construction of the broken zone tunnel usually adopts the construction principle of "pipe advance, strict grouting, short excavation, no (weak) blasting, strong support, fast closure, frequent measurement, and fast feedback". Under the protection of the pre-consolidation of the surrounding rock by grouting the small pipe shed in advance of the arch, the three-step step method is used for construction to reduce the damage to the tunnel caused by the sliding of the broken zone; when the above three-step step method is used for construction, although small pipes are set in advance and the surrounding surrounding rocks are grouting through the small pipes, there is still the possibility of sliding in the fault broken zone in a larger range. At present, the surrounding rock support is usually achieved by combining steel arch frames with support mechanisms in the strong support process, but the existing support mechanisms and steel frames take a long time to assemble and erect, which increases the exposure time of the tunnel without support after blasting, and thus increases the risk of surrounding rock collapse when the tunnel passes through the broken zone; and the length and height of the existing support mechanisms are usually fixed, which cannot adapt well to the requirements of different tunnel section sizes. Utility Model Content

[0005] The utility model provides a steel frame support device and an early warning method for a broken zone tunnel, aiming to solve the problem that when the existing tunnel broken zone is supported by the steel frame, the steel frame assembly support time is too long, which easily causes the tunnel to collapse. The utility model can realize the rapid assembly of the steel frame support device, can reduce the time for steel frame erection, reduce the exposure time of the tunnel without support after blasting, and reduce the risk of surrounding rock collapse when the tunnel passes through the broken zone; it can also monitor the deformation of the surrounding rock and the stress of the steel frame, and promptly issue an alarm when the surrounding rock undergoes long-term large deformation and short-term sudden deformation, and the stress of the steel frame exceeds its safe allowable value, thereby improving the safety of construction.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A steel frame support device for a broken zone tunnel comprises a long beam section, wherein lateral adjustment mechanisms are vertically and symmetrically arranged on both sides of the bottom of the long beam section, a height adjustment mechanism is arranged at the bottom of each lateral adjustment mechanism, a base moving mechanism is arranged at the bottom of each height adjustment mechanism, a plurality of support mechanisms are arranged at the top of the long beam section, and a steel frame is arranged at the top of the support mechanisms.

[0008] Preferably, each of the base moving mechanisms comprises a load-bearing base, a driving mechanism, two auxiliary support mechanisms and four movable pulleys, the four movable pulleys are arranged at the bottom of the load-bearing base, the driving mechanism is connected to the movable pulleys, and the two auxiliary support mechanisms are symmetrically arranged on two opposite sides of the load-bearing base.

[0009] Preferably, the driving mechanism includes a first driving motor, a second driving motor, a first driving gear, a second driving gear, a first bevel gear and two second bevel gears. The first driving motor and the second driving motor are respectively arranged on the sides of the load-bearing base, the first bevel gear and the first driving gear are respectively arranged on the output shafts of the first driving motor and the second driving motor, the two second bevel gears are respectively arranged on the corresponding rotating rods on the two movable pulleys on the same side, the two second bevel gears are respectively meshed with the first bevel gear, the second driving gear is arranged at the top of the load-bearing base, and the first driving gear and the second driving gear are meshed.

[0010] Preferably, each auxiliary support mechanism includes a leg, a support hydraulic machine, a connecting leg and a leg base, the leg is arranged on the side of the load-bearing base, the support hydraulic machine and the connecting leg are both arranged inside the leg, the top of the connecting leg is connected to the bottom of the hydraulic rod of the support hydraulic machine, the bottom of the connecting leg penetrates and extends to the outside of the leg, and the leg base is arranged at the bottom of the connecting leg.

[0011] Preferably, each of the height adjustment mechanisms includes a first support rod, a first hydraulic unit, a second support rod and a load-bearing top seat, the bottom of the first support rod is vertically arranged inside the load-bearing base, the first support rod is fixed to the load-bearing base by a base fixing bolt, the first hydraulic unit is arranged at the top of the first support rod, the bottom of the second support rod is connected to the top of the hydraulic rod of the first hydraulic unit, the load-bearing top seat is arranged above the second support rod, the top of the second support rod is arranged inside the load-bearing top seat, and the second support rod and the load-bearing top seat are fixed by the top seat fixing bolts.

[0012] Preferably, each of the lateral adjustment mechanisms includes an installation slot, a plurality of slide rails, a plurality of sliders, a plurality of rolling wheels, a support connecting rod and a plurality of power mechanisms, the installation slot is opened at the top of the load-bearing top seat, the plurality of slide rails are arranged at intervals and staggered along the width direction of the installation slot, the plurality of sliders are respectively arranged above the corresponding slide rails, the plurality of power mechanisms are respectively arranged between the corresponding sliders and the corresponding slide rails, the support connecting rod is arranged above the plurality of sliders, the plurality of rolling wheels are rotatably sleeved on the support connecting rod, and each slider is respectively hinged to the support connecting rod.

[0013] Preferably, each power mechanism includes multiple transmission belts, multiple third drive motors and multiple sliding wheels, the multiple sliding wheels are respectively movably connected to the corresponding sliders, and the multiple sliding wheels are respectively slidingly connected to the corresponding slide rails, the multiple third drive motors are respectively arranged inside the corresponding sliders, and the multiple transmission belts are respectively connected to the output shafts of the corresponding third drive motors and the corresponding sliding wheels.

[0014] Preferably, each group of the support mechanisms includes a vertical support mechanism, a first offset support mechanism and a second offset support mechanism. The vertical support mechanism, the first offset support mechanism and the second offset support mechanism are all arranged at the top of the long beam section and are all connected to the first limit block. The first offset support mechanism and the second offset support mechanism are respectively located on both sides of the vertical support mechanism, and the vertical support mechanism, the first offset support mechanism and the second offset support mechanism have the same structure.

[0015] Preferably, the vertical support mechanism includes a support base, a second hydraulic unit, a fixed seat, a U-shaped fixing groove, a limiting through groove and a protruding buckle, the limiting through groove is opened at the bottom of the support base, the support base is plugged into the first limiting block on the long beam section through the limiting through groove, the second hydraulic unit is arranged at the top of the support base, the fixed seat is arranged above the second hydraulic unit, and the bottom of the fixed seat is connected to the top of the hydraulic rod on the second hydraulic unit, the U-shaped fixing groove is opened at the top of the fixed seat, the protruding buckle is arranged inside the U-shaped fixing groove, the steel frame is plugged into the U-shaped fixing groove, and the protruding buckle is plugged into the groove on the steel frame.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] (1) The steel frame support device for a broken zone tunnel provided by the utility model can realize rapid assembly of the entire support device through the modular coordination design of the long beam section, the lateral adjustment mechanism, the height adjustment mechanism, the base moving mechanism, the support mechanism and the steel frame, which can reduce the time for erecting the steel frame, reduce the exposure time of the tunnel without support after blasting, and reduce the risk of surrounding rock collapse when the tunnel passes through the broken zone;

[0018] (2) The utility model can be quickly assembled and reused. After completing a monitoring and support task, it can quickly move forward to the next support. In addition, the utility model can adapt to different tunnel cross-sectional size requirements through the lateral adjustment mechanism and the splicing design of multiple long beam sections, and the support height of the steel frame support device can be adjusted through the lifting of the hydraulic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the structure of a steel frame support device for a broken zone tunnel provided by an embodiment of the utility model;

[0020] Figure 2 for Figure 1 A partial enlarged schematic diagram of the middle A part;

[0021] Figure 3 for Figure 2 The enlarged cross-sectional view of the middle B part;

[0022] Figure 4 A left view of a steel frame support device for a broken zone tunnel provided by an embodiment of the utility model;

[0023] Figure 5 for Figure 4 A partial enlarged schematic diagram of the middle C part;

[0024] Figure 6 It is a structural schematic diagram of the lateral adjustment mechanism in the embodiment of the utility model;

[0025] Figure 7 for Figure 6 A partial enlarged schematic diagram of the middle D part;

[0026] Figure 8 It is a structural schematic diagram of the lateral adjustment mechanism in the embodiment of the utility model in the working state;

[0027] In the figure: 101-moving pulley, 102-load-bearing base, 103-first drive motor, 104-support leg, 105-base fixing bolt, 106-support hydraulic device, 107-first bevel gear, 108-support leg base, 109-second drive motor, 110-second drive gear, 111-first drive gear, 112-second bevel gear, 201-first support rod, 202-first hydraulic unit, 203-second support rod, 204 load-bearing top seat, 205- Top seat fixing bolt, 206-slide rail, 207-slide wheel, 208-transmission belt, 209-rotatable support, 210-support connecting rod, 211-rolling wheel, 212-slider, 213-installation slot, 214-connecting rod, 215-bracket, 301-long beam section, 302-fixing bolt, 303-first limit block, 304-second limit block, 401-support base, 402-support base fixing bolt, 403-fixing seat, 404-lateral fixing bolt, 406-protruding buckle, 407-second hydraulic unit, 408-U-shaped fixing groove, 409-limiting slot. DETAILED DESCRIPTION

[0028] The following is a combination of the embodiments of the present invention Figures 1 to 8 , the technical solutions in the embodiments of the utility model are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] like Figures 1 to 8 As shown, the embodiment of the utility model provides a steel frame support device for a broken zone tunnel, specifically including a long beam section 301, and the bottom two sides of the long beam section 301 are respectively and vertically symmetrically provided with lateral adjustment mechanisms, the lateral adjustment mechanisms are used to bear and transfer the load on the long beam section 301, and at the same time, the height adjustment mechanism and the base moving mechanism move radially along the tunnel; the bottom of each lateral adjustment mechanism is provided with a height adjustment mechanism, the height adjustment mechanism is used to bear the load transferred by the lateral adjustment mechanism, and adjust the support height of the long beam section 301; the bottom of each height adjustment mechanism is provided with a base moving mechanism, the base moving mechanism is used to bear the load transferred by the long beam section 301, and the entire support device moves longitudinally along the tunnel; the top of the long beam section 301 is provided with multiple groups of support mechanisms, the support mechanisms are used to bear the dead weight of the steel frame and the additional stress of the surrounding rock on the steel frame; the top of the support mechanism is provided with a steel frame 6, and the steel frame 6 is used to support the surrounding rock. The structures of the hydraulic mechanisms involved in the embodiments of the utility model are all existing technologies, and any existing hydraulic mechanism can be used as long as the height adjustment of the object can be achieved.

[0030] In an embodiment of the utility model, each base moving mechanism includes a load-bearing base 102, a first drive motor 103, a second drive motor 109, a first drive gear 111, a second drive gear 110, a first bevel gear 107, two second bevel gears 112, two auxiliary support mechanisms and four movable pulleys 101. The above-mentioned first drive motor 103, the second drive motor 109, the first drive gear 111, the second drive gear 110, the first bevel gear 107, and the two second bevel gears 112 are the driving mechanism of this embodiment, which is used to drive the four movable pulleys 101 to move forward or backward. Four movable pulleys 101 are arranged at the bottom of the load-bearing base 102, specifically, the four movable pulleys 101 are evenly distributed at the bottom of the load-bearing base 102, and the two movable pulleys 101 on the front side and the two movable pulleys 101 on the rear side are respectively connected together by their own rotating rods, and the two rotating rods are respectively rotatably connected to the bottom of the load-bearing base 102; the first drive motor 103 and the second drive motor 109 are respectively arranged on the side of the load-bearing base 102, the first bevel gear 107 and the first drive gear 111 are respectively arranged on the output shafts of the first drive motor 103 and the second drive motor 109, the two second bevel gears 112 are respectively arranged on the corresponding rotating rods on the two movable pulleys 101 on the same side, the two second bevel gears 112 are respectively meshed with the first bevel gear 107, the second drive gear 110 is arranged on the top of the load-bearing base 102, the first drive gear 111 and the second drive gear 110 are meshed, and the two auxiliary support mechanisms are symmetrically arranged on the two opposite sides of the load-bearing base 102.

[0031] When it is necessary to move the broken zone tunnel steel frame support device provided by the embodiment of the utility model, start the first drive motor 103, the first drive motor 103 drives the first bevel gear 107 to rotate, and then drives the two second bevel gears 112 to rotate, so that the four moving pulleys 101 rotate in the same direction, so that the entire support device moves forward or backward, and finally moves to the position that needs support.

[0032] In the embodiment of the utility model, each specific auxiliary support mechanism includes a support leg 104, a support hydraulic press 106, a connecting leg 113 and a support leg base 108. The support leg 104 is arranged on the side of the load-bearing base 102, the support hydraulic press 106 and the connecting leg 113 are both arranged inside the support leg 104, the top of the connecting leg 113 is connected to the bottom of the hydraulic rod of the support hydraulic press 106, the bottom of the connecting leg 113 penetrates and extends to the outside of the support leg 104, and the support leg base 108 is arranged at the bottom of the connecting leg 113. In the specific design of the embodiment of the utility model, a first placement groove and a second placement groove which are interconnected are opened at the bottom of the support leg 104, the first placement groove is located above the second placement groove, the support hydraulic press 106 is arranged inside the first placement groove, and the top of the support hydraulic press 106 is connected to the bottom of the first placement groove, the connecting leg 113 is arranged inside the second placement groove, and the top of the connecting leg 113 is connected to the bottom of the hydraulic rod of the support hydraulic press 106.

[0033] When the support device provided by the embodiment of the utility model is assembled, the support hydraulic machine 106 is pressurized to move the connecting leg 113 downward, driving the leg base 108 to move downward, so that the leg base 108 falls and contacts the ground, thereby expanding the contact area of ​​the steel frame support device with the ground in the direction of travel, which not only improves the stability of the support, but also shares the deadweight of the steel frame 6, the deformation pressure of the surrounding rock and the deadweight of the entire support device through the leg base 108, thereby reducing the pressure on the moving pulley 101. After completing a steel frame support task, the leg base 108 is driven by the support hydraulic machine 106 to rise and separate from the ground, and then the entire device can be moved.

[0034] When it is necessary to adjust the moving direction of the movable pulley 101, loosen the base fixing bolt 105. At this time, the first support rod 201 and the load-bearing base 102 are in a rotatable state, start the second drive motor 109, drive the first drive gear 111 to rotate, and then drive the second drive gear 110 to rotate. Since the second drive gear 110 and the load-bearing base 102 are fixedly connected, the load-bearing base 102 and the movable pulley 101 are driven to rotate inward 90°, and then turn off the second drive motor 109, and fix the first support rod 201 and the load-bearing base 102 by the fixing bolt 105.

[0035] In the embodiment of the utility model, each specific height adjustment mechanism includes a first support rod 201, a first hydraulic unit 202, a second support rod 203 and a load-bearing top seat 204. The bottom of the first support rod 201 is vertically arranged inside the load-bearing base 102. The first support rod 201 is fixed to the load-bearing base 102 by a base fixing bolt 105. The first hydraulic unit 202 is arranged on the top of the first support rod 201. The bottom of the second support rod 203 is connected to the top of the hydraulic rod of the first hydraulic unit 202. The load-bearing top seat 204 is arranged It is placed above the second support rod 203, and the top of the second support rod 203 is arranged inside the load-bearing top seat 204. When the embodiment of the utility model is specifically designed, the top of the second support rod 203 is designed as a "T"-shaped structure, and a "T"-shaped through groove along the left and right directions that matches the top structure of the second support rod 203 is opened inside the load-bearing top seat 204. The second support rod 203 is plugged into the "T"-shaped through groove on the load-bearing top seat 204, and the second support rod 203 and the load-bearing top seat 204 are fixed by the top seat fixing bolts 205.

[0036] When the support height of the entire support device needs to be adjusted, the first hydraulic unit 202 is started, the hydraulic rod is extended or shortened, driving the second support rod 203 to rise or fall, thereby adjusting the support height of the long beam section 301 and the steel frame 6.

[0037] In the embodiment of the utility model, each specific lateral adjustment mechanism includes an installation slot 213, a plurality of slide rails 206, a plurality of sliders 212, a plurality of rolling wheels 211, a plurality of transmission belts 208, a plurality of third drive motors, a plurality of rotatable supports 209, a plurality of connecting rods 214, a supporting connecting rod 210 and a plurality of sliding wheels 207. In the embodiment of the utility model, the plurality of third drive motors, a plurality of rotatable supports 209 and a plurality of sliding wheels 207 are the power mechanism for driving the slider 212 to move along the slide rail 206; the slide rail 206, the slider 212, the rolling wheel 211, the transmission belt 208, the third drive motor, the rotatable support 209, the connecting rod 214 and the slide The number of the moving wheels 207 is preferably 5, and the installation slot 213 is opened on the top of the load-bearing top seat 204. The multiple slide rails 206 are arranged alternately along the width direction of the installation slot 213. Specifically, three slide rails 206 are arranged on the right side, and two slide rails 206 are arranged on the left side. The slide rails 206 arranged on the left and the slide rails 206 arranged on the right are arranged alternately in sequence, that is, a right slide rail, followed by a left slide rail, and then a right slide rail, and so on. The five slide rails 206 are parallel to each other, and the five sliders 212 are respectively placed above the corresponding slide rails 206. The five sliding wheels 207 are movably connected to the corresponding sliders 212, specifically: a socket is opened in the middle of the sliding wheel 207 , a connecting shaft is movably inserted inside the socket, and the slider 212 is symmetrically fixedly connected to the connecting shaft through two brackets 215, and the two brackets 215 are respectively located on both sides of the sliding wheel 207, and the sliding wheel 207 is slidably connected to the corresponding slide rail 206, specifically, the five sliding wheels 207 are all arranged on the right side of the corresponding slider 212; the five third driving motors are respectively arranged inside the corresponding slider 212, and the five transmission belts 208 are respectively connected to the output shaft of the corresponding third driving motor and the corresponding sliding wheel 207. In the specific design, in order not to affect the normal rotation of the sliding wheel 207, a connecting column is arranged in the middle of the side of the sliding wheel 207, and the five transmission belts 208 are respectively connected to the output shaft of the corresponding third driving motor And connected with the connecting column, the support link 210 is placed above the five sliders 212. At this time, the bottom of the long beam section 301 contacts the top of the rolling wheel 211, and the bottom of the long beam section 301 contacts the top of the load-bearing top seat 204. The five rolling wheels 211 are rotatably sleeved on the support link 210. In the specific design, limit blocks can be respectively set on both sides of the position of the rolling wheel 211 on the support link 210 to limit the rolling wheel 211 to prevent it from moving along the length direction of the support link 210. The five rotatable supports 209 are respectively set on the top of the corresponding sliders 212, one end of the five connecting rods 214 is connected to the corresponding rotatable supports 209, and the other end is hinged to the support link 210.

[0038] When it is necessary to adjust the positions of the height adjustment mechanism and the base moving mechanism laterally according to the width of the tunnel so as to make them reach a suitable supporting position, the five third driving motors are started to drive the sliding wheels 207 slidably connected to the three slide rails 206 on the right side to rotate to the left, thereby driving the sliding wheels 207 and the slider 212 to move to the left, while the sliding wheels 207 slidably connected to the three slide rails 206 on the left side rotate to the right, thereby driving the sliding wheels 207 and the slider 212 to move to the right. As the slider 212 on the right side and the slider 212 on the left side gradually move in opposite directions, the supporting connecting rod 210 and the rolling wheel are driven by the action of the connecting rod 214. 211 is gradually lifted up, at this time, the bottom of the long beam section 301 and the top of the load-bearing top seat 204 are gradually separated and no longer in contact, and the long beam section 301 is only in contact with the rolling wheel 211, and the contact friction between the long beam section 301 and the lower structure is reduced, and the five third drive motors are turned off, and then the base fixing bolts 105 are loosened. At this time, the first support rod 201 and the load-bearing base 102 are in a state of being able to rotate and move, and the two second drive motors 109 are started to drive the first drive gear 111 to rotate, and then drive the second drive gear 110 to rotate. Since the second drive gear 110 and the load-bearing base 102 are fixedly connected, the load-bearing base 102 and the movable pulley 106 are driven to rotate. 01 is rotated 90° inward or outward, at which time the moving direction of the moving pulley 101 changes to the width direction of the tunnel, and then the second driving motor 109 is turned off, and the first support rod 201 and the load-bearing base 102 are fixed by the fixing bolts 105; the first driving motor 103 is started, and the first driving motor 103 drives the first bevel gear 107 to rotate, and then drives the two second bevel gears 112 to rotate, so that the four moving pulleys 101 rotate in the same direction, driving the height adjustment mechanism and the base moving mechanism to move forward or backward along the bottom of the second limit block 304 through the rolling wheel 211, and finally move to a suitable supporting position. After moving to the appropriate position, start The five third drive motors are started to reverse, driving the sliding wheels 207 slidingly connected on the three slide rails 206 on the right side to rotate rightward, thereby driving the sliding wheels 207 and the slider 212 to move to the right, while the sliding wheels 207 slidingly connected on the three slide rails 206 on the left side rotate leftward, thereby driving the sliding wheels 207 and the slider 212 to move to the left side. As the slider 212 on the right side and the slider 212 on the left side gradually move away, under the action of the connecting rod 214, the supporting link 210 and the rolling wheel 211 are gradually retracted downward. At this time, the long beam section 301 contacts the top of the supporting link 210 and the rolling wheel 211.

[0039] The top and bottom of the long beam section 301 are respectively provided with a first limit block 303 and a second limit block 304. The long beam section 301 is plugged into the mounting groove 213 on the load-bearing top seat 204 through the second limit block 304. Through the coordinated design of the second limit block 304 and the mounting groove 213, the bottom of the long beam section 301 can always be located inside the mounting groove 213, and when the supporting connecting rod 210 and the rolling wheel 211 are not lifted upward, the bottom of the long beam section 301 is in contact with the top of the load-bearing top seat 204. In this way, since the second limit block 304 is limited by the mounting groove 213 and the contact friction resistance with the supporting connecting rod 210 and the rolling wheel 211, the plug-in stability of the long beam section 301 and the load-bearing top seat 204 is improved, thereby improving the stability of the support. The bottom of the second limit block 304 contacts the top of the rolling wheel 211, and the long beam section 301 is connected to the multiple support mechanisms through the first limit block 303. In the embodiment of the utility model, the long beam section 301 can be selected according to the tunnel size. A plurality of long beam sections 301 of appropriate quantity and length are selected, and are connected together by fixing bolts 302.

[0040] Each group of support mechanisms includes a vertical support mechanism, a first offset support mechanism and a second offset support mechanism. The vertical support mechanism, the first offset support mechanism and the second offset support mechanism are all arranged at the top of the long beam section 301 and are all connected to the first limit block 303. The first offset support mechanism and the second offset support mechanism are respectively located on both sides of the vertical support mechanism. The vertical support mechanism, the first offset support mechanism and the second offset support mechanism have the same structure. The first offset support mechanism and the second offset support mechanism have an inclined angle of 30° and 60° with the long beam section 301, respectively.

[0041] The vertical support mechanism includes a support base 401, a second hydraulic unit 407, a fixing seat 403, a U-shaped fixing groove 408, a limiting groove 409 and a protruding buckle 406. The limiting groove 409 is opened at the bottom of the support base 401. The support base 401 is plugged into the first limiting block 303 on the long beam section 301 through the limiting groove 409, and the support base 401 and the long beam section 301 are fixed together by the base fixing bolts 402. The support height can be adjusted by the second hydraulic unit 407, so as to ensure that the steel frame 6 can provide good support for the surrounding rock.

[0042] When the position of the support mechanism needs to be adjusted, the limiting through slot 409 on the support base 401 can be moved on the first limiting block 303. When it is moved to a suitable position, the support base 401 and the long beam section 301 are fixedly connected together by the base fixing bolt 402; the second hydraulic unit 407 is arranged on the top of the support base 401, the fixing seat 403 is arranged above the second hydraulic unit 407, and the bottom of the fixing seat 403 is connected to the top of the hydraulic rod on the second hydraulic unit 407, the U-shaped fixing slot 408 is opened on the top of the fixing seat 403, and the protruding buckle 406 is arranged in the inner middle of the U-shaped fixing slot 408 The steel frame 6 is plugged into the U-shaped fixing groove 408, and the U-shaped fixing groove 408 is fixedly connected to the steel frame 6 by the transverse fixing bolt 403. The force of the steel frame is transmitted to the steel frame supporting device. When the steel frame 6 is embedded in the U-shaped fixing groove 408, the protruding buckle 406 is inserted into the steel frame groove. When the steel frame 6 is inserted, the outer side of the protruding buckle 406 is first squeezed and bent. After the steel frame 6 is placed in place, the protrusion of the protruding buckle 406 rebounds to form a whole with the steel frame 6, thereby increasing the stability of the connection between the steel frame and the U-shaped fixing groove 408; the transverse fixing bolt 404 fixes the steel frame 6 and the U-shaped fixing groove 408 together through the prefabricated hole on the steel frame 6.

[0043] The working method of the broken zone tunnel steel frame support device provided by the embodiment of the utility model is:

[0044] Before the next blasting in the tunnel is completed, at the rear of the face, according to the tunnel diameter, a suitable long beam section 301 is selected and assembled together through the fixing bolts 302, and the appropriate number and size of the supporting mechanism are selected according to the tunnel size, and the steel frame 6 of the next advance is fixedly connected to the U-shaped fixing groove 408 through the transverse fixing bolts 404 on the supporting mechanism to achieve the fixation of the steel frame 6 and the supporting mechanism, and the supporting base 401 and the long beam section 301 are fixedly connected together through the base fixing bolts 402, and the upper part formed by the steel frame 6, the supporting mechanism, and the long beam section 301 is hoisted on the height adjustment mechanism. After the next blasting is completed, the first drive motor 103 is started, the first drive motor 103 drives the first bevel gear 107 to rotate, and then drives the two second bevel gears 112 to rotate, so that the four moving pulleys 101 rotate in the same direction, so that the entire support device moves forward or backward, and the support device is moved to the previously preset position, and then the five third drive motors are started to drive the sliding wheels 207 slidably connected to the three slide rails 206 on the right side to rotate left, thereby driving the sliding wheels 20 7 and the slider 212 move to the left, and the sliding wheel 207 slidably connected to the three slide rails 206 on the left side rotates to the right, thereby driving the sliding wheel 207 and the slider 212 to move to the right. As the slider 212 on the right side and the slider 212 on the left side gradually move in opposite directions, under the action of the connecting rod 214, the supporting connecting rod 210 and the rolling wheel 211 are gradually pushed up. At this time, the long beam section 301 is only in contact with the rolling wheel 211, and the contact friction between the long beam section 301 and the lower structure is reduced. Then the base fixing bolt 105 is loosened. At this time, the first supporting The rod 201 and the load-bearing base 102 are in a state of being able to rotate and move, and the two second drive motors 109 are started to drive the first drive gear 111 to rotate, and then drive the second drive gear 110 to rotate. Since the second drive gear 110 and the load-bearing base 102 are fixedly connected, the load-bearing base 102 and the moving pulley 101 are driven to rotate inward or outward 90°. At this time, the moving direction of the moving pulley 101 becomes along the width direction of the tunnel, and then the second drive motor 109 is turned off, and the first support rod 201 and the load-bearing base 102 are fixed by the fixing bolts 105;Start the first drive motor 103, the first drive motor 103 drives the first bevel gear 107 to rotate, and then drives the two second bevel gears 112 to rotate, so that the four moving pulleys 101 rotate in the same direction, driving the height adjustment mechanism and the base moving mechanism to move forward or backward along the bottom of the second limit block 304 through the rolling wheel 211, and finally move to a suitable support position, and adjust the support height through the second hydraulic unit 407, so that the steel frame 6 can support the surrounding rock well, assemble the steel frame sections, and pressurize the support hydraulic press 106 to move the leg base 108 downward, so that the leg base 108 falls and contacts the ground, and completes one operation. ;

[0045] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A steel frame support device for a broken zone tunnel, characterized in that: It comprises a long beam section (301), wherein lateral adjustment mechanisms are respectively arranged vertically and symmetrically on both sides of the bottom of the long beam section (301), a height adjustment mechanism is arranged at the bottom of each lateral adjustment mechanism, a base moving mechanism is arranged at the bottom of each height adjustment mechanism, and a plurality of groups of supporting mechanisms are arranged at the top of the long beam section (301), and a steel frame (6) is arranged at the top of the supporting mechanisms.

2. The broken zone tunnel steel frame support device according to claim 1, characterized in that: Each base moving mechanism comprises a load-bearing base (102), a driving mechanism, two auxiliary supporting mechanisms and four moving pulleys (101); the four moving pulleys (101) are arranged at the bottom of the load-bearing base (102); the driving mechanism is connected to the moving pulleys (101); and the two auxiliary supporting mechanisms are symmetrically arranged on two opposite side surfaces of the load-bearing base (102).

3. The broken zone tunnel steel frame support device according to claim 2, characterized in that: The driving mechanism comprises a first driving motor (103), a second driving motor (109), a first driving gear (111), a second driving gear (110), a first bevel gear (107) and two second bevel gears (112); the first driving motor (103) and the second driving motor (109) are respectively arranged on the side of the load-bearing base (102); the first bevel gear (107) and the first driving gear (111) are respectively arranged on the output shafts of the first driving motor (103) and the second driving motor (109); the two second bevel gears (112) are respectively arranged on corresponding rotating rods on two moving pulleys (101) on the same side; the two second bevel gears (112) are respectively meshed with the first bevel gear (107); the second driving gear (110) is arranged on the top of the load-bearing base (102); and the first driving gear (111) and the second driving gear (110) are meshed.

4. The broken zone tunnel steel frame support device according to claim 2, characterized in that: Each auxiliary support mechanism comprises a support leg (104), a support hydraulic machine (106), a connecting support leg (113) and a support leg base (108); the support leg (104) is arranged on the side of the load-bearing base (102); the support hydraulic machine (106) and the connecting support leg (113) are both arranged inside the support leg (104); the top of the connecting support leg (113) is connected to the bottom of the hydraulic rod of the support hydraulic machine (106); the bottom of the connecting support leg (113) passes through the support leg (104); and the support leg base (108) is arranged at the bottom of the connecting support leg (113).

5. The broken zone tunnel steel frame support device according to claim 2, characterized in that: Each of the height adjustment mechanisms comprises a first support rod (201), a first hydraulic unit (202), a second support rod (203) and a load-bearing top seat (204); the bottom of the first support rod (201) is vertically arranged inside the load-bearing base (102); the first support rod (201) is fixed to the load-bearing base (102); the first hydraulic unit (202) is arranged at the top of the first support rod (201); the bottom of the second support rod (203) is connected to the top of the hydraulic rod of the first hydraulic unit (202); the load-bearing top seat (204) is arranged above the second support rod (203); and the top of the second support rod (203) is arranged inside the load-bearing top seat (204).

6. The broken zone tunnel steel frame support device according to claim 5, characterized in that: Each of the lateral adjustment mechanisms comprises an installation slot (213), a plurality of slide rails (206), a plurality of sliders (212), a plurality of rolling wheels (211), a support connecting rod (210) and a plurality of power mechanisms. The installation slot (213) is opened at the top of the load-bearing top seat (204). The plurality of slide rails (206) are arranged in an interlaced manner along the width direction of the installation slot (213). The plurality of sliders (212) are respectively arranged above the corresponding slide rails (206). The plurality of power mechanisms are respectively arranged between the corresponding sliders and the corresponding slide rails. The support connecting rod (210) is arranged above the plurality of sliders (212). The plurality of rolling wheels (211) are rotatably sleeved on the support connecting rod (210), and each slider is respectively hinged to the support connecting rod (210).

7. The broken zone tunnel steel frame support device according to claim 6, characterized in that: Each of the power mechanisms comprises a plurality of transmission belts (208), a plurality of third drive motors and a plurality of sliding wheels (207); the plurality of sliding wheels (207) are respectively movably connected to corresponding sliders (212); the plurality of sliding wheels (207) are respectively slidably connected to corresponding slide rails (206); the plurality of third drive motors are respectively arranged inside corresponding sliders (212); and the plurality of transmission belts (208) are respectively connected to output shafts of corresponding third drive motors and corresponding sliding wheels (207).

8. The broken zone tunnel steel frame support device according to claim 1, characterized in that: Each group of the support mechanisms comprises a vertical support mechanism, a first offset support mechanism and a second offset support mechanism. The vertical support mechanism, the first offset support mechanism and the second offset support mechanism are all arranged at the top of the long beam section (301). The first offset support mechanism and the second offset support mechanism are respectively located on both sides of the vertical support mechanism. The vertical support mechanism, the first offset support mechanism and the second offset support mechanism have the same structure.

9. The broken zone tunnel steel frame support device according to claim 8, characterized in that: The vertical support mechanism comprises a support base (401), a second hydraulic unit (407), a fixing seat (403), a U-shaped fixing groove (408), a limiting groove (409) and a protruding buckle (406); the limiting groove (409) is arranged at the bottom of the support base (401); the second hydraulic unit (407) is arranged at the top of the support base (401); the fixing seat (403) is arranged above the second hydraulic unit (407); the U-shaped fixing groove (408) is arranged at the top of the fixing seat (403); the protruding buckle (406) is arranged inside the U-shaped fixing groove (408); the steel frame (6) is plugged into the U-shaped fixing groove (408); and the protruding buckle (406) is plugged into a groove on the steel frame (6).

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