CN203891891U - Hard rock tunneling machine - Google Patents
Hard rock tunneling machine Download PDFInfo
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- CN203891891U CN203891891U CN201420312142.7U CN201420312142U CN203891891U CN 203891891 U CN203891891 U CN 203891891U CN 201420312142 U CN201420312142 U CN 201420312142U CN 203891891 U CN203891891 U CN 203891891U
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Abstract
The utility model relates to a hard rock tunneling machine. The hard rock tunneling machine comprises a cutterhead used for cutting rock, a driving system, main beams and a propulsion supporting step-change system, wherein the driving system is used for driving the cutterhead to rotate, the main beams comprise the front main beam and the rear main beam hinged to the front main beam, the cutterhead is arranged on the driving system, the driving system is arranged on the front main beam, the propulsion supporting step-change system is used for achieving forward movement of the main beams and comprises a propulsion device, and the propulsion device is connected with the front main beam and the rear main beam. When turning tunneling is carried out, the included angle between the front main beam and the rear main beam can be adjusted through the propulsion device. When the hard rock tunneling machine is adopted for tunneling operation, small-turning-radius turning tunneling can be achieved.
Description
Technical field
The utility model relates to technical field of engineering machinery, particularly a kind of hard rock tunnel development machine.
Background technology
Full section rock tunnel development machine (TBM) can be realized the constructing tunnel operations such as propelling, broken rock, muck removal, supporting simultaneously, have fast, the outstanding advantages such as high-quality, safety, economy, environmental protection, in the construction of tunnel such as water conservancy, electric power, railway, coal, mine, traffic, subway and city underground engineering, obtained application more and more widely.
In tunnel line design, because a variety of causes inevitably exists curved section on horizontal plane, this just requires the hard rock tunnel development machine can be according to a certain turning radius driving of turning in work progress.But, the structure length of hard rock tunnel development machine own is longer, in turning process, be subject to the restriction of himself structure length, substantially can realize the turning driving of turning radius 250m-300m, but for special construction, for example, under colliery constructing tunnel condition, need to carry out the turning driving of turning radius below 100m.And along with the variation of following underground construction engineering, realize tight-turning hard rock tunnel development machine and will there is larger market.Therefore, be badly in need of one and can realize tight-turning hard rock tunnel development machine.
Utility model content
For above-mentioned problem, the utility model proposes a kind of hard rock tunnel development machine, while adopting this hard rock tunnel development machine construction, can realize tight-turning turning driving.
According to first aspect of the present utility model, a kind of hard rock tunnel development machine has been proposed, comprising: cutterhead, for cutting rock; Drive system, it is for driving cutterhead to rotate; Girder, it comprises front girder and the rear girder hinged with front girder, and cutterhead is arranged at drive system, and drive system is arranged at front girder; Advance the system of changing step that supports, it advances the support system of changing step to comprise propulsion plant for realizing the reach of development machine, and propulsion plant connects respectively front girder and rear girder, and in the time turning driving, propulsion plant can regulate the angle between front girder and rear girder.
While adopting above-mentioned hard rock tunnel development machine construction, drive systems cutterhead rotates, ream landwaste with this, advance the support system of changing step to realize the reach of girder, in the time that needs are turned driving, regulate the angle between front girder and rear girder by propulsion plant, due to front girder and rear girder hinged, so it can be arbitrarily angled that propulsion plant makes the angle between front girder and rear girder, realize different turning radius by the setting of angle of turn, the tight-turning turning driving of girder, particularly cutterhead before realizing thus.
In one embodiment, advance the support system of changing step also to comprise and support change step device and rear support device, change step device and rear support device of support is arranged at rear girder, for being alternately supported in hole wall, propulsion plant and the support device of changing step is connected, and coordinates with change step device and rear support device of support the reach that realizes development machine.When straight line driving, the support device of changing step is supported in hole wall, rear support device is packed up, knife cutting rock, girder reach before propulsion plant advances, after the front girder of now reach drives, girder moves forward, when rear support device after mobile preset distance is supported in hole wall, the support device of changing step is packed up, and propulsion plant drives and supports girder after the device follow-up of changing step, and realizes thus the reach of development machine.
In one embodiment, front girder and rear girder are configured to respectively the housing of hollow, and the rearward end of front girder and the leading section of rear girder are stacked to form the internal chamber of penetrating main beam, therefrom pass for the conveyor of carrying landwaste.The employing of hollow housing is therefrom passed for conveyor, makes thus this hard rock tunnel development machine overall structure simplify.
In one embodiment, the rearward end of rear girder is provided with debris outlet, and landwaste is delivered to debris outlet by conveyor.The conveyor of the internal chamber by being arranged at girder is discharged through debris outlet thus, thus the landwaste that cutterhead can be cut down derive in time, successfully realize the headwork of development machine, enhance productivity.
In one embodiment, the rearward end of front girder comprises the first rib that thickness is thicker, the leading section of rear girder comprises the second rib that thickness is thicker, and the first rib and the second rib are realized the stacked of the rearward end of front girder and the leading section of rear girder by bearing pin.The second rib that the first rib that thickness is thicker and thickness are thicker can improve the bonding strength of front girder and rear girder, bearing pin reliable operation in addition, easy accessibility.
In one embodiment, propulsion plant comprises at least one group of propulsion cylinder that is arranged at respectively girder both sides, and the rod end of propulsion cylinder is connected to front girder, and the rear end of propulsion cylinder is arranged at rear girder.When straight line driving, the duty of at least one group of propulsion cylinder of girder both sides is basic identical, to guarantee normally carrying out of straight line headwork, in the time turning driving, realize the adjusting of front girder with respect to the angle between rear girder by the elongation that regulates the elongation of at least one group of propulsion cylinder of girder one side to be different from the propulsion cylinder of girder opposite side, thereby realize the turning radius of setting.In a preferred embodiment, be arranged at the rotation of place straight line lower than described cutterhead of making a concerted effort of at least one group of propulsion cylinder of the every side of described girder.Because the weight of cutterhead and drive system is heavier, cutterhead and drive system in the process of rock cutting, can be subject to the extruding force of rock and self gravitation to it to posteroinferior torsional moment, and in the situation of place straight line lower than the rotation of cutterhead with joint efforts of at least one group of propulsion cylinder of the every survey of girder, this can offset the suffered downward torsional moment of part cutterhead and drive system with joint efforts, and the safety that is beneficial to headwork is carried out.
In one embodiment, support the device of changing step and comprise the saddletree that is provided with slide rail on it and the support boots that are arranged at saddletree both sides, support boots are connected to described saddletree by support boots cylinder, and rear girder is arranged on slide rail moving along slide rail.Thus when rear support device is packed up, support is changed step the support boots of device while being supported on the wall of hole, before when before propulsion plant promotes, girder moves forward, girder drives rear girder and rear support device to move forward on the slide rail of saddletree, girder and rear support device reach thus, then rear support device is supported in Dong Bishang, the piston rod of support boots cylinder drives support boots to regain, girder after saddletree follows up by slide rail.
In one embodiment, the rear end of propulsion cylinder is connected in support boots.In the process of propulsion cylinder girder or rear girder before propelling, can be subject to propulsive thrust, the rear end of propulsion cylinder is connected to support boots, carry out the suffered propulsive thrust of balance propulsion cylinder by the frictional force between support boots and hole wall, to improve the service behaviour of this hard rock tunnel development machine.
In this application, term 'fornt', 'back' is defined as for development machine tunneling direction, direction towards development machine driving is " front ", direction is in contrast " afterwards ", term "up" and "down" is defined as for the horizontal plane of development machine place in addition, the direction of being pointed to development machine place horizontal plane by ground is D score, in contrary direction be " on ".
Compared with prior art, the utility model has the advantage of, traditional girder is divided into front girder and rear girder by hinged mode, the cutterhead that is provided with drive system drive on front girder cuts landwaste with this, on rear girder, be provided with propulsion plant, in the time that straight line tunnels, girder reach before propulsion plant promotes, and coordinate with change step device and rear support device of support the integral forward lead of realizing development machine.In addition, in the time turning driving, regulate the angle between front girder and rear girder by propulsion plant, the turning that realizes different turning radius with this is tunneled.
Brief description of the drawings
To be described in more detail the utility model based on embodiment and with reference to accompanying drawing hereinafter.Wherein:
Fig. 1 is according to the stereogram of the hard rock tunnel development machine of a preferred embodiment of the present utility model;
Fig. 2 is the top view of the development machine of hard rock tunnel shown in Fig. 1;
Fig. 3 is the sectional drawing along the A-A line of the development machine of hard rock tunnel shown in Fig. 2;
Fig. 4 is the partial enlarged drawing at the B place in Fig. 3.
In the drawings, identical member is indicated by identical Reference numeral.Accompanying drawing is not according to actual scale.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described further.
As shown in the figure, the hard rock tunnel development machine the utility model proposes comprises cutterhead 10, drive system 20, girder 30 and propelling support system, and girder 30 comprises front girder 31 and rear girder 32.Hard rock tunnel development machine of the present utility model and all parts thereof will be described in detail belows.
As depicted in figs. 1 and 2, cutterhead 10 can cut landwaste, according to rock stratum and the production capacity of cutting, on cutterhead 10, corresponding cutter, for example hobboing cutter can be installed.Cutterhead 10 is mounted to the leading section of drive system 20 by cutter head support device.
Drive system 20 produces flywheel moment and rotates with band movable knife disc 10, thereby realizes the broken rock of hobboing cutter.As shown in the figure, drive system 20 is arranged on front girder 31, this shows that front girder 31 is determining the direction of the rotation of cutterhead 10 to a certain extent, and front girder 31 is determining tunneling direction.In the process of excavation operation, front girder 31 is carrying countertorque and the torsional moment that broken rock driving power produces, can see above girder 31 and must have compared with high resistance torque capability, and the hollow design of front girder 31 and rear girder 32 has stronger anti-torsion ability comparatively speaking.
As depicted in figs. 1 and 2, girder 30 comprises front girder 31 and rear girder 32, and front girder 31 and rear girder 32 are hinged by bearing pin 35.Between front girder 31 and rear girder 32, form thus the angle of different angles.
Advance to support and change step system for advancing the reach of girder 30, this propelling is supported the system of changing step and is comprised propulsion plant 40, propulsion plant 40 connects respectively front girder 31 and rear girder 32, and in the time turning driving, propulsion plant 40 is used for regulating the angle between front girder 31 and rear girder 32.Those skilled in the art can find out, propulsion plant 40 can regulate the relative angle of front girder 31 and rear girder 32 as regulon.Propulsion plant 40 can be to regulate arbitrarily the rod member being hinged, the device that the angle between them is changed.The assembly of for example hydraulic cylinder or motor and worm screw turbine mechanism.
Preferably, advance and support the system of changing step and also comprise and support change step device 50 and rear support device 70, be connected because propulsion plant 40 connects respectively front girder 31 and rear girder 32, particularly propulsion plant 40 and the support of rear girder 32 device 50 of changing step.Under driving operating mode, the support device 50 of changing step is supported in hole wall, when rear support device 70 is packed up, cutterhead 10 rock cuttings, before propulsion plant 40 advances, girder 31 moves forward, after the front girder 31 of reach drives, girder and rear support device 70 move forward, after mobile preset distance, rear support device 70 is supported in hole wall, the support device 50 of changing step is packed up, propulsion plant 40 drives and supports the rear girder 32 of device 50 follow-up of changing step, realize thus the reach of development machine entirety, realize the headwork of hard rock tunnel development machine with this.
As preferred embodiment, as shown in Figure 3, front girder 31 and rear girder 32 are the housing of hollow, the hinged of front girder 31 and rear girder 32 can adopt: the leading section of the rearward end of front girder 31 and rear girder 32 is stacked, then hinged at stacked position, form the internal chamber 33 of penetrating main beam 30 with the inside of this girder 31 and rear girder 32, carry the conveyor 60 of landwaste to pass in this internal chamber 33 of girder 30, smoothly landwaste is exported to thus to the rear side of hard rock tunnel development machine, guarantee the carrying out of the normal work of hard rock tunnel development machine.
Further, as shown in Figure 4, the rearward end of front girder 31 comprises the first rib 311 that thickness is thicker, and the leading section of rear girder 32 comprises the second rib 321 that thickness is thicker.When concrete installation, the first rib 311 and the second rib 321 form respectively the installing hole coordinating with bearing pin, then by stacked to the first rib 311 and the second rib 321, hold revoking in hole 352 so that bearing pin 35 is mounted in installing hole of bearing pin 35 by suspender, finally install bearing pin clamp 353, move along himself axial direction to limit bearing pin 35.In addition as shown in the figure, the periphery of bearing pin 35 is respectively arranged with wear-resistant sleeve 351, to reduce the wearing and tearing between bearing pin 35 and the first rib 311 and the second rib 321, extends their application life.
As a preferred embodiment, propulsion plant 40 comprises at least one group of propulsion cylinder that is separately positioned on girder 30 both sides, and the rod end of propulsion cylinder is connected to front girder 31, and the rear end of propulsion cylinder is arranged on rear girder 32.Propulsion cylinder can be the hydraulic cylinder that control accuracy is higher, thus the elongation of the piston rod of at least one group of propulsion cylinder of girder 30 1 sides is different to the elongation of the piston rod of at least one group of propulsion cylinder of girder 30 opposite sides, just can realizes the angle at any angle between front girder 31 and rear girder 32.
Further, as depicted in figs. 1 and 2, propulsion plant 40 comprises two groups of propulsion cylinders that are arranged at respectively girder 30 both sides, for clearly explanation, spy provides numbering, and one group of upper end near girder 30 in two groups of propulsion cylinders of each side, as the first propulsion cylinder 41 and the second propulsion cylinder 42, another group in two groups of propulsion cylinders of each side is near the lower end of girder 30, as the 3rd propulsion cylinder 43 and the 4th propulsion cylinder 44.The elongation of the piston rod by regulating above-mentioned four groups of propulsion cylinders regulates the angle between front girder 31 and rear girder 32 thus.The position of above-mentioned four propulsion cylinders, does not form restriction of the present utility model only as example at this.
Preferably, be arranged at the rotation of place straight line lower than cutterhead 10 of making a concerted effort of at least one group of propulsion cylinder (the first propulsion cylinder 41 and the 3rd propulsion cylinder 43, or the second propulsion cylinder 42 and the 4th propulsion cylinder 44) of girder 30 every sides.Because the straight line at the place of making a concerted effort of at least one group of propulsion cylinder of girder 30 every sides is lower than cutterhead 10, propulsion plant 40 gives cutterhead 10 and drive system 20 with the torsional moment to front upper place by front girder so, with this balance cutterhead 10 and drive system 20 suffered to posteroinferior torsional moment.
In one embodiment, as shown in Figure 2, the support device 50 of changing step comprises the saddletree 51 that is provided with slide rail on it and the support boots 52 that are arranged at saddletree 51 both sides, and support boots 52 are connected to saddletree 51 by support boots cylinder 53, and rear girder 32 is arranged on slide rail moving along slide rail.Thus when rear support device 70 is packed up, support is changed step the support boots 52 of device 50 while being supported on the wall of hole, before propulsion plant 40 promotes, girder 31 moves forward, front girder 31 is brought rear girder 32 into and rear support device 70 moves forward on the slide rail of saddletree 51, thus, girder 32 and rear support device 70 move forward, and after mobile preset distance, rear support device 70 is supported in Dong Bishang, the piston rod of support boots cylinder 53 drives support boots 52 to regain, and saddletree 51 has also been realized and having been moved forward by slide rail.Saddletree 51 plays support effect, and support boots cylinder 53 can be hydraulic cylinder, and the elongation of its piston rod can be realized 52 stretching hole wall or the withdrawals of support boots.
In one embodiment, the rear end of propulsion cylinder is connected in support boots.When supportting boots and be supported in hole wall with this, suffered frictional force can be offset propulsive thrust suffered in the process of propulsion cylinder girder 31 before propelling.
The course of work of hard rock tunnel development machine of the present utility model is described below.
While adopting this hard rock tunnel development machine tunneling construction, cutterhead 10 remains down rotation in working order, in the time that straight line tunnels, the piston rod of the propulsion cylinder of propulsion plant 40 extends, girder 31 before promoting forward, front girder 31 drives drive system 20 and cutterhead 10 to move forward, therefore when straight line tunnels, the reach of cutterhead 10 and rotation occur simultaneously, cutterhead 10 cuts rock mass simultaneously, the landwaste dropping is delivered to debris outlet 34 through conveyor 60, and pass through other deslagging equipment delivery to tunnel, in addition because rear girder 32 can slide on the slide rail of saddletree 51, so propulsion plant 40 is pushed ahead front girder 31, (now rear support device is packed up, support boots 52 are supported in Dong Bishang) time, after front girder 31 drives simultaneously, girder 32 and rear support device 70 move forward, realize cutterhead with this, the reach of the parts such as drive system and girder.In the time that the elongation of propulsion cylinder reaches range, rear support device 70 launches to be supported on Dong Bishang, support boots cylinder 53 bounces back and regains will support boots 52, propulsion cylinder bounces back to drive support boots 52 and saddletree 51 on rear girder 32, to move forward that (now cutterhead 10, drive system 20, front girder 31, rear girder 32, rear support device 70 are all motionless, cutterhead 10 is still rotating), in the time that propulsion cylinder bounces back to initial position, support boots cylinder 53 struts boots 52 and is supported in hole wall, rear support device 70 is packed up, the piston rod of propulsion cylinder extends, and starts next progradation.In the time that needs are turned driving, due to front girder 31 and rear girder 32 hinged, before institute, between girder 31 and rear girder 32, can be angle at any angle, realize any angle between front girder 31 and rear girder 32 by the elongation that regulates the elongation of piston rod of at least one group of propulsion cylinder of girder 30 1 sides to be different from the piston rod of at least one group of propulsion cylinder of girder 30 opposite sides, the different turning radius, particularly tight-turning turning that realize cutterhead 10 with this are tunneled.
Although the utility model is described with reference to preferred embodiment, in the situation that not departing from scope of the present utility model, can carries out various improvement and can replace parts wherein with equivalent it.The utility model is not limited to disclosed specific embodiment in literary composition, but comprises all technical schemes in the scope that falls into claim.
Claims (9)
1. a hard rock tunnel development machine, is characterized in that, comprising:
Cutterhead, for cutting rock;
Drive system, it is for driving described cutterhead to rotate;
Girder, it comprises front girder and the rear girder hinged with described front girder, and described cutterhead is arranged at described drive system, and described drive system is arranged at described front girder;
Advance the system of changing step that supports, it is for realizing the reach of described development machine, described propelling is supported the system of changing step and is comprised propulsion plant, described propulsion plant connects respectively described front girder and described rear girder, when propulsion plant described in when driving of turning can regulate the angle between described front girder and described rear girder.
2. hard rock tunnel development machine according to claim 1, it is characterized in that, described propelling is supported the system of changing step and is also comprised and support change step device and rear support device, change step device and described rear support device of described support is arranged at described rear girder, for being alternately supported in hole wall, described propulsion plant and the described support device of changing step is connected, and coordinates with change step device and described rear support device of described support the reach that realizes described development machine.
3. hard rock tunnel development machine according to claim 1 and 2, it is characterized in that, described front girder and described rear girder are configured to respectively the housing of hollow, the rearward end of described front girder and the leading section of described rear girder are stacked to form the internal chamber that connects described girder, therefrom pass for the conveyor of carrying landwaste.
4. hard rock tunnel development machine according to claim 3, is characterized in that, the rearward end of described rear girder is provided with debris outlet, and described landwaste is delivered to described debris outlet by described conveyor.
5. hard rock tunnel development machine according to claim 3, it is characterized in that, the rearward end of described front girder comprises the first rib that thickness is thicker, the leading section of described rear girder comprises the second rib that thickness is thicker, and described the first rib and described the second rib are realized the stacked of the rearward end of described front girder and the leading section of described front girder by bearing pin.
6. hard rock tunnel development machine according to claim 2, it is characterized in that, described propulsion plant comprises at least one group of propulsion cylinder that is arranged at respectively described girder both sides, and the rod end of described propulsion cylinder is connected to described front girder, and the rear end of described propulsion cylinder is arranged at described rear girder.
7. hard rock tunnel development machine according to claim 6, is characterized in that, is arranged at the rotation of place straight line lower than described cutterhead of making a concerted effort of at least one group of propulsion cylinder of the every side of described girder.
8. hard rock tunnel development machine according to claim 6, it is characterized in that, the described support device of changing step comprises the saddletree that is provided with slide rail on it and the support boots that are arranged at described saddletree both sides, described support boots are connected to described saddletree by support boots cylinder, and described rear girder is arranged on described slide rail moving along described slide rail.
9. hard rock tunnel development machine according to claim 8, is characterized in that, the rear end of described propulsion cylinder is connected in described support boots.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420312142.7U CN203891891U (en) | 2014-06-12 | 2014-06-12 | Hard rock tunneling machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420312142.7U CN203891891U (en) | 2014-06-12 | 2014-06-12 | Hard rock tunneling machine |
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| CN203891891U true CN203891891U (en) | 2014-10-22 |
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| CN201420312142.7U Active CN203891891U (en) | 2014-06-12 | 2014-06-12 | Hard rock tunneling machine |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103993889A (en) * | 2014-06-12 | 2014-08-20 | 中国铁建重工集团有限公司 | Hard rock tunnel boring machine |
| WO2015188356A1 (en) * | 2014-06-12 | 2015-12-17 | 中国铁建重工集团有限公司 | Hard rock tunnel boring machine |
| CN106979016A (en) * | 2017-05-26 | 2017-07-25 | 东北大学 | A kind of microwave presplitting formula hard rock tunnel development machine cutterhead |
| CN109139035A (en) * | 2018-08-21 | 2019-01-04 | 中铁工程装备集团盾构再制造有限公司 | A kind of hard rock mole circulation driving method |
| CN109296377A (en) * | 2018-09-25 | 2019-02-01 | 中铁工程服务有限公司 | A kind of construction method that rock tunnel(ling) machine stepping is appeared |
| CN110159289A (en) * | 2019-06-28 | 2019-08-23 | 重庆市能源投资集团科技有限责任公司 | A kind of coal mine light section shield excavation machine |
| CN110159282A (en) * | 2019-06-28 | 2019-08-23 | 重庆市能源投资集团科技有限责任公司 | A kind of construction technology of coal mine light section shield shield excavation machine |
| CN115199285A (en) * | 2022-09-13 | 2022-10-18 | 北方重工集团有限公司 | Small-turning main beam hinged open type TBM for hard rock tunnel construction |
-
2014
- 2014-06-12 CN CN201420312142.7U patent/CN203891891U/en active Active
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103993889A (en) * | 2014-06-12 | 2014-08-20 | 中国铁建重工集团有限公司 | Hard rock tunnel boring machine |
| WO2015188356A1 (en) * | 2014-06-12 | 2015-12-17 | 中国铁建重工集团有限公司 | Hard rock tunnel boring machine |
| CN103993889B (en) * | 2014-06-12 | 2017-05-31 | 中国铁建重工集团有限公司 | A kind of hard rock tunnel development machine |
| CN106979016A (en) * | 2017-05-26 | 2017-07-25 | 东北大学 | A kind of microwave presplitting formula hard rock tunnel development machine cutterhead |
| CN106979016B (en) * | 2017-05-26 | 2019-02-05 | 东北大学 | A kind of microwave presplitting formula hard rock tunnel development machine cutterhead |
| CN109139035A (en) * | 2018-08-21 | 2019-01-04 | 中铁工程装备集团盾构再制造有限公司 | A kind of hard rock mole circulation driving method |
| CN109296377A (en) * | 2018-09-25 | 2019-02-01 | 中铁工程服务有限公司 | A kind of construction method that rock tunnel(ling) machine stepping is appeared |
| CN110159289A (en) * | 2019-06-28 | 2019-08-23 | 重庆市能源投资集团科技有限责任公司 | A kind of coal mine light section shield excavation machine |
| CN110159282A (en) * | 2019-06-28 | 2019-08-23 | 重庆市能源投资集团科技有限责任公司 | A kind of construction technology of coal mine light section shield shield excavation machine |
| CN115199285A (en) * | 2022-09-13 | 2022-10-18 | 北方重工集团有限公司 | Small-turning main beam hinged open type TBM for hard rock tunnel construction |
| CN115199285B (en) * | 2022-09-13 | 2022-12-02 | 北方重工集团有限公司 | Small-turning main beam hinged open type TBM for hard rock tunnel construction |
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Address after: 410100 No. 88 East 7 Line, Changsha Economic and Technological Development Zone, Hunan Province Patentee after: China Railway Construction Heavy Industry Group Co., Ltd. Address before: 410100 Changsha Province, the city of Hunan by the East Road, No. seven, No. 88 Patentee before: China Railway Construction Heavy Industry Co.,Ltd. |