CN108571325B - Horseshoe full-section rock tunnel boring machine and construction method thereof - Google Patents
Horseshoe full-section rock tunnel boring machine and construction method thereof Download PDFInfo
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- CN108571325B CN108571325B CN201810465775.4A CN201810465775A CN108571325B CN 108571325 B CN108571325 B CN 108571325B CN 201810465775 A CN201810465775 A CN 201810465775A CN 108571325 B CN108571325 B CN 108571325B
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- 239000011435 rock Substances 0.000 title claims abstract description 33
- 238000010276 construction Methods 0.000 title abstract description 12
- 238000003801 milling Methods 0.000 claims abstract description 93
- 238000007790 scraping Methods 0.000 claims abstract description 75
- 239000002893 slag Substances 0.000 claims abstract description 60
- 238000009412 basement excavation Methods 0.000 claims abstract description 39
- 230000005641 tunneling Effects 0.000 claims abstract description 14
- 230000000712 assembly Effects 0.000 claims description 18
- 238000000429 assembly Methods 0.000 claims description 18
- 230000007246 mechanism Effects 0.000 claims description 15
- 230000009471 action Effects 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 description 5
- 230000008602 contraction Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000013049 sediment Substances 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 235000003283 Pachira macrocarpa Nutrition 0.000 description 1
- 241001083492 Trapa Species 0.000 description 1
- 235000014364 Trapa natans Nutrition 0.000 description 1
- 208000022971 Tuberculous meningitis Diseases 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 208000001223 meningeal tuberculosis Diseases 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 235000009165 saligot Nutrition 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/08—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield
- E21D9/0875—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield with a movable support arm carrying cutting tools for attacking the front face, e.g. a bucket
- E21D9/0879—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield with a movable support arm carrying cutting tools for attacking the front face, e.g. a bucket the shield being provided with devices for lining the tunnel, e.g. shuttering
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/12—Devices for removing or hauling away excavated material or spoil; Working or loading platforms
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses a horseshoe-shaped full face rock tunnel boring machine and a construction method thereof, and solves the problems that horseshoe-shaped tunnel excavation cannot be formed at one time, overexcavation or underexcavation is easy to occur in the prior art. The invention comprises a driving system, a control system, a detection system and a tunneling host machine, wherein the tunneling host machine comprises a circular cutter head, a shield assembly, a main driving and supporting beam frame, a telescopic milling and digging head assembly and a telescopic slag scraping plate assembly are arranged between the circular cutter head and the shield assembly, the telescopic milling and digging head assembly and the telescopic slag scraping plate assembly are arranged in a crossing way, the telescopic milling and digging head assembly and the telescopic slag scraping plate assembly are controlled by the control system, and the telescopic slag scraping plate assembly corresponds to a host machine belt conveyor arranged on the supporting beam frame. The horseshoe-shaped section tunnel is excavated in the mode of excavating the circular section firstly and then the non-circular section, the excavation accuracy is high, the working efficiency is greatly improved, the market blank of horseshoe-shaped TBM for rock excavation is made up, and the horseshoe-shaped TBM has higher popularization value.
Description
Technical Field
The invention relates to the technical field of open tunneling machines, in particular to a horseshoe-shaped full-face rock tunnel tunneling machine and a construction method thereof.
Background
A full-face Tunnel Boring Machine (TBM) is large tunnel boring equipment integrating mechanical, electronic, hydraulic, laser and other technologies, and plays an important role in mountain tunnels, diversion engineering and urban subway construction. TBM is divided into shield type TBM and open type TBM, tunnel section of TBM excavation is generally circular. However, with the development of high-speed railways in China, the requirements of high-speed rails on tunnel sections are diversified in order to increase the utilization rate of tunnel space. The construction requirement of the high-speed railway tunnel meets the high speed of the train, has good ventilation and rescue channels, and has the advantages of good tunnel quality, low construction cost and short construction period. The completed Mongolian railway white city tunnel has the total length of 3.4 km, adopts a horseshoe-shaped section, mainly adopts silt, fine sand and sandy soil as geological conditions, adopts a multi-cutterhead for excavation, is only suitable for soft soil stratum, and cannot be used for rock stratum. Horseshoe TBMs currently adapted to rock have not yet emerged.
The horseshoe-shaped section excavation has the following problems: 1. the horseshoe-shaped section has no central symmetry, the horseshoe-shaped section cannot be excavated in a rotary mode, and another excavation mode is added on the basis of the round section to finish the excavation of the area between the horseshoe-shaped section and the round section; 2. the rock slag cut by the circular cutterhead is collected into a main machine belt conveyor through a slag scraping plate arranged on the periphery of the cutterhead. The rock slag excavated by the non-circular part is accumulated at the bottom of the tunnel, but the slag scraping plate of the circular cutter head cannot scrape the rock slag at the bottom of the tunnel, and a new slag scraping plate must be designed to collect slag soil when the non-circular section is excavated; 3. the section of the circular cutter head excavation is the largest inscribed circle track of the horseshoe-shaped interface, the distance between the inscribed circle and the horseshoe-shaped track is large, the non-circular excavation cannot be carried out in one step and needs to be carried out for multiple times, so that the slag scraping of the non-circular part cannot be completed once, and the latest section needs to be adapted in real time; 4. the existing shield and other components are matched with a normally circular excavated tunnel, are not suitable for horseshoe-shaped tunnel surfaces, and need to be further improved.
Disclosure of Invention
Aiming at the defects in the background technology, the invention provides a horseshoe-shaped full-face rock tunnel boring machine and a construction method thereof, which solve the problems that horseshoe-shaped tunnel excavation cannot be formed at one time, over-excavation or under-excavation is easy to occur and the working efficiency is low in the prior art.
The technical scheme of the invention is realized as follows: the horseshoe-shaped full face rock tunnel boring machine comprises a driving system, a control system and a tunneling host machine, wherein the tunneling host machine comprises a round cutterhead, a shield assembly, a main drive and a support beam frame, one end of the shield assembly is connected with the round cutterhead, the other end of the shield assembly is connected with the support beam frame, and the main drive is arranged on the support beam frame and is connected with the round cutterhead; the front end face of the circular cutterhead is uniformly provided with a main cutter and an edge cutter, a telescopic milling and digging head assembly and a telescopic scraping plate assembly are arranged between the circular cutterhead and the shield assembly, the telescopic milling and digging head assembly and the telescopic scraping plate assembly are arranged in a crossing mode, the telescopic milling and digging head assembly and the telescopic scraping plate assembly are controlled by a control system, and the telescopic scraping plate assembly corresponds to a host machine belt conveyor arranged on a supporting beam frame.
The telescopic milling and digging head assembly comprises a guide sleeve connected with the circular cutterhead and a milling and digging head telescopic oil cylinder, a guide column is arranged in the guide sleeve, a milling and digging head and a hydraulic motor are arranged at the upper end of the guide column, the hydraulic motor provides power for the rotation of the milling and digging head, one end of the milling and digging head telescopic oil cylinder is hinged with the guide column, and the other end of the milling and digging head telescopic oil cylinder is connected with the circular cutterhead through an oil cylinder ear seat.
One side of the guide sleeve is provided with a pipeline chain row for clamping the pipeline.
The telescopic slag scraping plate assembly comprises a slag guiding plate connected with the circular cutter head, a slag scraping telescopic oil cylinder is arranged on the slag guiding plate, the free end of the slag scraping telescopic oil cylinder is connected with the slag scraping plate, the slag scraping plate moves along the slag guiding plate under the action of the slag scraping telescopic oil cylinder, and the slag discharging end of the slag guiding plate corresponds to the host belt conveyor.
Four groups of telescopic milling and digging head assemblies and four groups of telescopic scraping plate assemblies are arranged between the circular cutter head and the shield assembly, the four groups of telescopic milling and digging head assemblies are uniformly arranged at the rear part of the circular cutter head along the radial direction, the four groups of telescopic scraping plate assemblies are uniformly arranged at the rear part of the circular cutter head along the radial direction, and the four groups of telescopic milling and digging head assemblies and the four groups of telescopic scraping plate assemblies are positioned in the same plane.
The shield assembly comprises an upper shield body, a lower shield body and a side guard plate which are connected end to end, the upper shield body and the side guard plate are connected with a support beam frame through support oil cylinders respectively, the side guard plate is an elliptical arc-shaped plate, and the elliptical arc-shaped plate is matched with the inner side wall of the horseshoe-shaped tunnel.
The support beam frame comprises a front girder and a rear girder, a propulsion mechanism, a shoe supporting mechanism and rear supporting legs are sequentially arranged on the rear girder, a saddle is arranged in the shoe supporting mechanism, a host belt conveyor penetrates through the saddle, shoe supporting plates are arranged on the outer sides of the shoe supporting mechanisms, the shoe supporting plates are elliptical arc-shaped plates, and the elliptical arc-shaped plates are matched with the inner side walls of the horseshoe-shaped tunnels; the lower part of the rear supporting leg is provided with a supporting guard plate which is an elliptical arc-shaped plate, and the elliptical arc-shaped plate is matched with the inner side wall of the horseshoe-shaped tunnel.
The construction method of the horseshoe-shaped full face rock tunnel boring machine comprises the following steps: s1, a control system controls a telescopic milling and digging head assembly and a telescopic scraping plate assembly, so that the milling and digging head and the scraping plate are retracted into the contour line of a circular cutter; s2, starting the circular cutterhead to rotate, and tunneling forward for one stroke under the action of the propelling force of the propelling mechanism to finish excavation of a circular section; s3, keeping the circular cutterhead to rotate only and not advance, and starting a hydraulic motor to drive the milling and digging head to rotate; s4, controlling the telescopic milling and digging head assembly and the telescopic scraping plate assembly by the control system, so that the milling and digging head and the scraping plate gradually extend out of the contour line of the circular cutterhead, and digging a non-circular section of the horseshoe-shaped section on the basis of the circular section; s5, keeping the cutting distance of the milling and digging head consistent with the digging stroke of the circular cutter head, and collecting the rock cut by the milling and digging head to the outside of a conveying hole on a main machine belt conveyor through a slag scraping plate and a slag guide plate; s6, after the horseshoe-shaped section profiling is completed, the control system controls the milling head and the slag scraping plate to retract into the contour line of the circular cutter head; and (5) circularly reciprocating to finish the excavation of the whole horseshoe-shaped tunnel.
The telescopic milling and digging head assembly is added on the circular cutter head to finish profiling excavation work of the horseshoe-shaped section, smooth slag discharge is realized through the telescopic slag scraping plate assembly, continuous construction of the horseshoe-shaped section tunnel can be realized under the condition of hard rock suitable for milling and digging head excavation, and the working effect is high, and the conditions of overexcavation and underexcavation are avoided. When carrying out non-circular excavation, under control system's effect, every mills dig head and scrapes the slag plate and all can stretch out different length in different positions, ensures when having certain excavation volume, can in time scrape the timely scraping of rock residue that gets off again, improves excavation efficiency and excavation precision, realizes the one shot forming excavation. The horseshoe-shaped section tunnel is excavated in the mode of excavating the circular section firstly and then the non-circular section, the excavation accuracy is high, the working efficiency is greatly improved, the market blank of horseshoe-shaped TBM for rock excavation is made up, and the horseshoe-shaped TBM has higher popularization value.
Drawings
In order to more clearly illustrate the embodiments of the present invention, the drawings that are required for the description of the embodiments will be briefly described below, it being apparent that the drawings in the following description are only some embodiments of the present invention and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
FIG. 1 is a schematic diagram of the overall structure of the present invention.
Fig. 2 is A-A view of fig. 1.
Fig. 3 is a view B-B of fig. 1.
Fig. 4 is a view of fig. 1C-C.
Fig. 5 is a view D-D of fig. 1.
Fig. 6 is a schematic structural view of the retractable milling head assembly and the retractable scraper assembly in a retracted state.
Fig. 7 is a schematic structural view of the telescopic milling head assembly and the telescopic scraper assembly in an extended state.
Fig. 8 is a schematic diagram of an excavation area of a milling head.
Fig. 9 is a schematic diagram of the principle of the circular cutterhead and the milling head excavation.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1-9, in embodiment 1, a horseshoe-shaped full face rock tunnel boring machine includes a driving system, a control system, a detection system and a tunneling host, wherein the driving system, the control system and the detection system are all connected with the tunneling host. The tunneling host comprises a circular cutterhead 1, a shield assembly 2, a main drive 3 and a supporting beam frame 4, wherein a cutterhead panel of the circular cutterhead 1 adopts conventional design, and has normal tunneling and slag discharging functions. One end of the shield assembly 2 is connected with the circular cutterhead 1, the other end is connected with the supporting beam frame 4, and the main drive 3 is arranged on the supporting beam frame 4 and connected with the circular cutterhead 1 to provide driving force for rotation of the circular cutterhead. The front end face of the circular cutterhead 1 is uniformly provided with a main cutter 5 and an edge cutter 6, wherein the main cutters are uniformly arranged in groups along the radial direction of the circular cutterhead and are used for cutting rocks on the front face, and the edge cutters are arranged on the outer circumference of the circular cutterhead and are used for cutting rocks on the edge side. A telescopic milling and digging head assembly 7 and a telescopic scraping plate assembly 8 are arranged between the circular cutter head 1 and the shield assembly 2, the telescopic milling and digging head assembly 7 and the telescopic scraping plate assembly 8 are arranged in a crossing mode, the telescopic milling and digging head assembly 7 and the telescopic scraping plate assembly 8 are controlled by a control system, and the telescopic scraping plate assembly 8 corresponds to a host machine belt conveyor 9 arranged on the support beam frame 4. When the circular cutterhead excavates a circular section, the milling and excavating head is retracted into the outline of the cutterhead; after a certain stroke is excavated by the circular cutterhead, the cutterhead stops pushing, the cutterhead continues to rotate, the milling and digging head stretches out according to a certain rule under the control of the oil cylinder, the milling and digging head rotates and rocks are cut along with the rotation of the cutterhead. Thus, the milling head can finish the excavation of the rock from the round section to the horseshoe section within a certain time. In order to ensure the excavation efficiency, the milling and excavating heads work in a combined mode, the cutting of the milling and excavating heads is progressive, and the maximum distance between the horseshoe-shaped section and the circular section can be ensured to be covered by the cutting range.
Further, the telescopic milling and digging head assembly 7 comprises a guide sleeve 7-1 connected with the circular cutter head 1 and a milling and digging head telescopic oil cylinder 7-2, a guide column 7-3 is arranged in the guide sleeve 7-1, a milling and digging head 7-4 and a hydraulic motor 7-5 are arranged at the upper end of the guide column 7-3, the hydraulic motor 7-5 provides power for the rotation of the milling and digging head 7-4, one end of the milling and digging head telescopic oil cylinder 7-2 is hinged with the guide column 7-3, and the other end of the milling and digging head telescopic oil cylinder is connected with the circular cutter head 1 through an oil cylinder ear seat 7-6. The guide post drives the hydraulic motor and the milling head to move up and down along the guide sleeve under the action of the telescopic oil cylinder of the milling head to extend and retract the milling head, and a pipeline chain row 7-7 for clamping a pipeline is arranged on one side of the guide sleeve 7-1 to prevent the pipeline and the pipeline from being damaged in the rotation process of the circular cutter.
Further, the scalable scum board assembly 8 includes the scum board 8-1 that is connected with circular cutterhead 1, be equipped with on the scum board 8-1 and scrape the flexible hydro-cylinder 8-2 of sediment, the free end of scraping the flexible hydro-cylinder 8-2 of sediment is connected with scum board 8-3, scum board 8-3 is along the motion of scum board 8-1 under the effect of scraping the flexible hydro-cylinder 8-2 of sediment, the slag end of scum board 8-1 corresponds with host computer belt feeder 9, circular section excavation is along with milling the excavation of dig head, the section of stroke has exceeded the scope that circular cutterhead scum board can cover, at this moment, a large amount of stone slag can pile up in the below in tunnel, if the stone slag can not in time be scraped away, will prevent milling dig head to the cutting here. However, since the contoured trajectory is a gradual process, the slag scraping trajectory must also be adapted to the new trajectory in real time, so that a fixed slag scraping plate cannot be designed. The telescopic scraping plate controlled by the oil cylinder is designed, and the control process is similar to the control of the milling head. The slag scraping plates are designed at the positions of each group of milling and digging heads at intervals, and the expansion and contraction of each group of slag scraping plates are consistent with the expansion and contraction of the previous group of milling and digging heads, so that the rock slag cut by each group of milling and digging heads can be timely scraped and transported away. In order to ensure the slag scraping effect, the rotating speed of the cutterhead is not easy to be too high during non-circular excavation. Four groups of telescopic milling and digging head assemblies 7 and four groups of telescopic scraping plate assemblies 8 are arranged between the circular cutter head 1 and the shield assembly 2, the four groups of telescopic milling and digging head assemblies 7 are uniformly arranged at the rear part of the circular cutter head 1 along the radial direction, the four groups of telescopic scraping plate assemblies 8 are uniformly arranged at the rear part of the circular cutter head 1 along the radial direction, and the four groups of telescopic milling and digging head assemblies 7 and the four groups of telescopic scraping plate assemblies 8 are positioned in the same plane. To realize the profiling excavation of non-circular sections, the milling and excavating head and the scraping plate are required to be accurately controlled, and the time, the speed and the travel of each expansion and contraction are required to be strictly controlled. Meanwhile, the logic control between four groups of milling heads and four groups of scraping plates is also a difficult point of the patent, each group of scraping plates is suitable for the section of the excavation position of the previous group of milling heads in real time, each group of milling heads is required to increase a certain amount of cutting depth on the basis of cutting of the previous group of milling heads, the speed and the time of increasing the cutting depth are different, the real-time monitoring cutter disc rotation angle of a rotary encoder is adopted, and the cutter disc rotation angle is transmitted to a control system to serve as one of signals for controlling the milling heads and the scraping plates, so that the cutter disc type scraper is timely, accurate and effective.
The construction method of the horseshoe-shaped full face rock tunnel boring machine comprises the following steps: s1, a control system controls a telescopic milling and digging head assembly and a telescopic scraping plate assembly, so that the milling and digging head and the scraping plate are retracted into the contour line of a circular cutter; s2, starting the circular cutterhead to rotate, and tunneling forward for one stroke under the action of the propelling force of the propelling mechanism to finish excavation of a circular section; s3, keeping the circular cutterhead to rotate only and not to advance, reducing the speed of the circular cutterhead, and starting a hydraulic motor to drive the milling and digging head to rotate; s4, controlling the telescopic milling and digging head assembly and the telescopic scraping plate assembly by the control system, so that the milling and digging head and the scraping plate gradually extend out of the contour line of the circular cutterhead, and digging a non-circular section of the horseshoe-shaped section on the basis of the circular section; s5, each group of telescopic milling head assembly and telescopic scraping plate assembly are controlled independently, and sequentially go through the cyclic processes of extending, retracting, extending and retracting along with the rotation of the circular cutterhead, wherein the rotation of the milling head, the rotation of the cutterhead, the synchronous actions of the milling head telescopic oil cylinder and the scraping plate telescopic oil cylinder are carried out in the process, the cutting distance of the milling head is kept consistent with the excavation stroke of the circular cutterhead, and rocks cut by the milling head are collected to the outside of a conveying hole on a main machine belt conveyor through the scraping plate and the slag guide plate; s6, after the horseshoe-shaped section profiling is completed, the control system controls the milling head and the slag scraping plate to retract into the contour line of the circular cutter head; and (5) circularly reciprocating to finish the excavation of the whole horseshoe-shaped tunnel.
Embodiment 2, a full face rock tunnel boring machine of water chestnut shape, shield assembly 2 includes the last shield body 2-1, the lower shield body 2-2 and the side shield 2-3 of end to end, goes up shield body 2-1 and side shield 2-3 and is connected with support beam frame 4 through supporting cylinder 2-4 respectively, and side shield 2-3 is oval arc, oval arc and horseshoe tunnel inside wall cooperate. The supporting beam frame 4 comprises a front girder 4-1 and a rear girder 4-2, wherein a propulsion mechanism 10, a shoe supporting mechanism 11 and a rear supporting leg 12 are sequentially arranged on the rear girder 4-2, a saddle 13 is arranged in the shoe supporting mechanism 11, a host belt conveyor 9 penetrates through the saddle 13, a shoe supporting plate 14 is arranged on the outer side of the shoe supporting mechanism 11, the shoe supporting plate 14 is an elliptical arc plate, and the elliptical arc plate is matched with the inner side wall of the horseshoe-shaped tunnel; the lower part of the rear supporting leg 12 is provided with a supporting guard plate 15, the supporting guard plate 15 is an elliptical arc plate, and the elliptical arc plate is matched with the inner side wall of the horseshoe-shaped tunnel. Because all the excavation and slag discharging work is completed at the cutter head, the shield, the supporting shoe and the rear supporting leg system of the TBM main machine area are matched with the horseshoe-shaped section. In particular, the outer contour of the side shield is matched with a part of the horseshoe-shaped contour, the outer contour of the supporting boot is matched with the radian of the horseshoe-shaped waist, and the boot plate at the bottom of the rear supporting leg is matched with the radian of the bottom of the horseshoe-shaped section, so that the supporting shoe has the function of stabilizing and supporting.
Other structures are the same as in embodiment 1.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (6)
1. The utility model provides a full face rock tunnel boring machine of horse-shoe shape, includes actuating system, control system and tunnelling host computer, its characterized in that: the tunneling host comprises a circular cutterhead (1), a shield assembly (2), a main drive (3) and a supporting beam frame (4), one end of the shield assembly (2) is connected with the circular cutterhead (1), the other end of the shield assembly is connected with the supporting beam frame (4), and the main drive (3) is arranged on the supporting beam frame (4) and is connected with the circular cutterhead (1); a main cutter (5) and an edge cutter (6) are uniformly arranged on the front end face of the circular cutter head (1), a telescopic milling head assembly (7) and a telescopic slag scraping plate assembly (8) are arranged between the circular cutter head (1) and the shield assembly (2), the telescopic milling head assembly (7) and the telescopic slag scraping plate assembly (8) are arranged in a crossing manner, the telescopic milling head assembly (7) and the telescopic slag scraping plate assembly (8) are connected with a control system, and the telescopic slag scraping plate assembly (8) corresponds to a main machine belt conveyor (9) arranged on the support beam frame (4);
the telescopic milling and digging head assembly (7) comprises a guide sleeve (7-1) connected with the circular cutter head (1) and a milling and digging head telescopic cylinder (7-2), a guide column (7-3) is arranged in the guide sleeve (7-1), a milling and digging head (7-4) and a hydraulic motor (7-5) are arranged at the upper end of the guide column (7-3), the hydraulic motor (7-5) provides power for the rotation of the milling and digging head (7-4), one end of the milling and digging head telescopic cylinder (7-2) is hinged with the guide column (7-3), and the other end of the milling and digging head telescopic cylinder is connected with the circular cutter head (1) through a cylinder ear seat (7-6);
the telescopic slag scraping plate assembly (8) comprises a slag guiding plate (8-1) connected with the circular cutter head (1), a slag scraping telescopic oil cylinder (8-2) is arranged on the slag guiding plate (8-1), a slag scraping plate (8-3) is connected to the free end of the slag scraping telescopic oil cylinder (8-2), the slag scraping plate (8-3) moves along the slag guiding plate (8-1) under the action of the slag scraping telescopic oil cylinder (8-2), and the slag discharging end of the slag guiding plate (8-1) corresponds to a main machine belt conveyor (9).
2. The horseshoe-shaped full face rock tunnel boring machine of claim 1, wherein: one side of the guide sleeve (7-1) is provided with a pipeline chain row (7-7) for clamping a pipeline.
3. The horseshoe-shaped full face rock tunnel boring machine according to claim 2, wherein: four groups of telescopic milling and digging head assemblies (7) and four groups of telescopic scraping plate assemblies (8) are arranged between the circular cutter head (1) and the shield assembly (2), the four groups of telescopic milling and digging head assemblies (7) are uniformly arranged at the rear part of the circular cutter head (1) along the radial direction, the four groups of telescopic scraping plate assemblies (8) are uniformly arranged at the rear part of the circular cutter head (1) along the radial direction, and the four groups of telescopic milling and digging head assemblies (7) and the four groups of telescopic scraping plate assemblies (8) are positioned in the same plane.
4. A horseshoe-shaped full face rock tunnel boring machine according to claim 3, wherein: the shield assembly (2) comprises an upper shield body (2-1), a lower shield body (2-2) and a side guard plate (2-3) which are connected end to end, the upper shield body (2-1) and the side guard plate (2-3) are connected with a support beam frame (4) through support cylinders (2-4) respectively, the side guard plate (2-3) is an elliptical arc plate, and the elliptical arc plate is matched with the inner side wall of the horseshoe-shaped tunnel.
5. Horseshoe-shaped full face rock tunnel boring machine according to claim 1 or 4, wherein: the supporting beam frame (4) comprises a front girder (4-1) and a rear girder (4-2), wherein a propelling mechanism (10), a shoe supporting mechanism (11) and a rear supporting leg (12) are sequentially arranged on the rear girder (4-2), a saddle frame (13) is arranged in the shoe supporting mechanism (11), a host belt conveyor (9) penetrates through the saddle frame (13), a shoe supporting plate (14) is arranged on the outer side of the shoe supporting mechanism (11), the shoe supporting plate (14) is an elliptical arc-shaped plate, and the elliptical arc-shaped plate is matched with the inner side wall of a horseshoe-shaped tunnel; the lower part of the rear supporting leg (12) is provided with a supporting guard board (15), the supporting guard board (15) is an elliptic arc-shaped board, and the elliptic arc-shaped board is matched with the inner side wall of the horseshoe-shaped tunnel.
6. A method of constructing a horseshoe-shaped full face rock tunnel boring machine according to claim 1, wherein: the method comprises the following steps: s1, a control system controls a telescopic milling and digging head assembly and a telescopic scraping plate assembly, so that the milling and digging head and the scraping plate are retracted into the contour line of a circular cutter; s2, starting the circular cutterhead to rotate, and tunneling forward for one stroke under the action of the propelling force of the propelling mechanism to finish excavation of a circular section; s3, keeping the circular cutterhead to rotate only and not advance, and starting a hydraulic motor to drive the milling and digging head to rotate; s4, controlling the telescopic milling and digging head assembly and the telescopic scraping plate assembly by the control system, so that the milling and digging head and the scraping plate gradually extend out of the contour line of the circular cutterhead, and digging a non-circular section of the horseshoe-shaped section on the basis of the circular section; s5, keeping the cutting distance of the milling and digging head consistent with the digging stroke of the circular cutter head, and collecting the rock cut by the milling and digging head to the outside of a conveying hole on a main machine belt conveyor through a slag scraping plate and a slag guide plate; s6, after the horseshoe-shaped section profiling is completed, the control system controls the milling head and the slag scraping plate to retract into the contour line of the circular cutter head; and (5) circularly reciprocating to finish the excavation of the whole horseshoe-shaped tunnel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810465775.4A CN108571325B (en) | 2018-05-16 | 2018-05-16 | Horseshoe full-section rock tunnel boring machine and construction method thereof |
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| CN109236315B (en) * | 2018-10-26 | 2024-04-12 | 中铁工程装备集团有限公司 | Flexible arm heading machine for excavating tunnel with arbitrary section by single cutter disc supported by robot |
| CN109488323A (en) * | 2018-10-26 | 2019-03-19 | 中铁工程装备集团有限公司 | Parallel robot support, the soft arm development machine that arbitrary cross-section tunnel can be excavated |
| CN109236314B (en) * | 2018-10-26 | 2024-04-09 | 中铁工程装备集团有限公司 | Flexible arm heading machine supported by serial robots and capable of excavating tunnels with arbitrary sections |
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| CN111075464B (en) * | 2020-01-17 | 2021-08-24 | 中铁工程装备集团有限公司 | Heading machine cutter head capable of realizing real-time reducing and expanding excavation and eccentric excavation method thereof |
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| CN112343609B (en) * | 2020-12-26 | 2022-04-29 | 中铁工程装备集团有限公司 | Hollow TBM cutter head, pilot tunnel expanding excavation TBM for inclined shaft and construction method |
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