CN116378689A - Non-circular rock tunnel boring machine and excavation system thereof - Google Patents
Non-circular rock tunnel boring machine and excavation system thereof Download PDFInfo
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- CN116378689A CN116378689A CN202310354339.0A CN202310354339A CN116378689A CN 116378689 A CN116378689 A CN 116378689A CN 202310354339 A CN202310354339 A CN 202310354339A CN 116378689 A CN116378689 A CN 116378689A
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- 239000011435 rock Substances 0.000 title claims abstract description 62
- 238000009412 basement excavation Methods 0.000 title claims abstract description 29
- 230000005641 tunneling Effects 0.000 claims abstract description 23
- 230000007246 mechanism Effects 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 5
- 230000008569 process Effects 0.000 claims abstract description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 239000002893 slag Substances 0.000 description 8
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000000295 complement effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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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
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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
- E21D9/093—Control of the driving shield, e.g. of the hydraulic advancing cylinders
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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
- E21D9/124—Helical conveying means therefor
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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 relates to a non-circular rock tunnel boring machine, which comprises a shield body, wherein the shield body is provided with a front end which is used for facing a tunneling face, the front end of the shield body is provided with at least one circular large cutterhead, a cutting blind area is formed around the circular large cutterhead, and a disc cutterhead is arranged at the cutting blind area; the axis of the disc-shaped cutterhead is vertical to the axis of the circular large cutterhead; the disc-shaped cutterhead is positioned at the rear of the circular large cutterhead; the disc-shaped cutterhead is driven by a rotation driving device to rotate along the axis of the disc-shaped cutterhead; during the rotation process, the circumferential surface of the disc-shaped cutter head faces the palm face, and rock in the cutting blind area is cut and broken through rotation; the disc cutter is driven by the left-right movement driving mechanism and the up-down driving mechanism to move left and right and up and down, so that the collection of sites which can be reached by the disc cutter covers the cutting blind area. Compared with the prior art, the heading machine disclosed by the invention is more suitable for smoothly completing the excavation operation of the non-circular rock tunnel in harder strata such as the rock tunnel.
Description
Technical Field
The invention relates to the technical field of tunneling equipment, in particular to a tunneling machine suitable for a non-circular tunnel under rock geological conditions and an excavating system thereof.
Background
Rock tunnel boring machines are increasingly valued by various industries because of great advantages of economy, safety, tunneling efficiency in rock stratum and the like, and are widely applied to underground engineering construction of railway tunnels, highway tunnels, diversion tunnels, coal mine tunnels, urban subway tunnels and the like. The circular excavation section rock tunnel boring machine is most widely applied, but the actual tunnel is often in a non-circular shape like a rectangle, a horseshoe and the like. However, the non-circular rock excavation section has the difficult problem of rock breaking in an excavation cutting blind area, and a larger circular section is adopted for excavation and hole forming construction correction, so that a great amount of engineering waste is caused.
Solutions have also been proposed by those skilled in the art for the realization of the tunneling of non-circular section tunnels. As disclosed in CN215979381U, a non-circular tunneling machine includes a shield body, and a multi-cutter combined cutting system is arranged at the front end; the front end of the shield body is also provided with a blind zone cutting system, and the blind zone cutting system comprises a plurality of long cylindrical cutting rollers; the cutting tool on the cutting drum protrudes from the outer peripheral surface of the shield body. When the tunnel is excavated, the rock mass of the cutting blind area can be directly cut by the cutting roller, and a cutter extending forwards is not required to be arranged at the front end of the shield body. Compared with a fixed cutter extending forwards is arranged at the front end of the shield body, the cutting roller can roll passively in the tunneling process, the scraper and the hob arranged on the cutting roller are utilized to cut a cutting blind area of the circular large cutterhead, tunneling resistance is reduced, and tunneling efficiency is improved. The cutting roller is not provided with a driving mechanism, and has a certain effect on pebble strata or soft strata, but the cutting capability is limited when tunneling in hard rocks, and the whole excavation efficiency of the tunneling machine is low. As another example, CN201802407U discloses a combined cutterhead tunneling machine, which comprises a tunneling shell and a compartment plate arranged in the shell, wherein the front end of the compartment plate is provided with 1 circular big cutterhead and 2-6 small cutterheads, the circular big cutterhead is positioned at the center of the tunneling palm surface, and the small cutterheads are dispersed in cutting blind areas around the circular big cutterhead. For example, if the excavation section is rectangular, 3 small cutterheads are respectively arranged at four corners of the circular large cutterhead. The three small cutterheads are arranged in a triangular position relationship, and the shafts of the three small cutterheads can be driven by the same motor; or two small cutterheads are driven by one motor respectively, and the third small cutterhead is driven by the front two motors through gear meshing. In the scheme, although the small cutterhead positioned in the cutting blind area of the circular large cutterhead is driven by a motor, the cutting blind area still exists between any two small cutterheads in the cutting blind area. For pebble stratum or soft rock stratum excavation operation, a part of soil is cut off, and other soil adjacent to the pebble stratum or soft rock stratum can be loosened and fall off, so that a good tunneling effect can be achieved; however, if the device is used for rock tunnel excavation, the excavation efficiency is difficult to improve due to the existence of a cutting blind area.
In order to solve the difficult problem of excavating a non-circular tunnel under rock geological conditions, the existing heading machine is necessary to be improved.
Disclosure of Invention
First, the technical problem to be solved
In view of the above-mentioned shortcomings and disadvantages of the prior art, the present invention provides a non-circular rock tunnel boring machine, which sets a disc cutter capable of swinging horizontally and vertically through a cutting blind area around a circular large cutter, the disc cutter is driven by a driving device to rotate, so that a hob provided at the annular edge of the disc cutter can reach each position in the cutting blind area to perform cutting and crushing, and the problem that the existing boring equipment is difficult to perform non-circular section excavation on a rock tunnel is solved. The invention also relates to an excavation system comprising the heading machine.
(II) technical scheme
In a first aspect, the present invention provides a non-circular rock tunnelling machine comprising: the shield body is provided with a front end which is used for facing the tunneling face, the front end of the shield body is provided with at least one circular large cutterhead, a cutting blind area is formed around the circular large cutterhead, and a disc cutterhead is further arranged at the cutting blind area; the axis of the disc-shaped cutterhead is perpendicular to the axis of the circular large cutterhead; the disc-shaped cutterhead is positioned at the rear of the circular large cutterhead; the disc cutter is driven by a rotation driving device to rotate along the axis of the disc cutter; in the rotating process, the circumferential surface of the disc-shaped cutter head faces the palm face, and rock in the cutting blind area is cut and crushed through rotation;
the disc cutter is arranged in the shield body, driven by the left-right movement driving mechanism and can move left and right in the horizontal direction, and driven by the up-down driving mechanism and moves up and down, so that the collection of sites reached by the disc cutter covers the cutting blind area.
According to the preferred embodiment of the invention, the shield body is of a steel shell structure matched with the outline of a non-circular rock tunnel, a main drive and a screw conveyor for driving a circular large cutter disc to rotate are arranged in the shield body, and the disc cutter disc, a rotation drive device acting on the disc cutter disc, a left-right movement drive mechanism and an up-down drive mechanism are also arranged in the shield body.
According to the preferred embodiment of the invention, the spiral conveyor is a muck conveying device with spiral blades arranged inside, and the muck conveying device is arranged at the bottom position of the inner side of the shield body and is used for transferring muck excavated by the circular large cutterhead and the dish-shaped cutterhead.
According to the preferred embodiment of the invention, the circular large cutterhead is provided with a hob and a cutter; the hob and the cutting knife are positioned on one side of the circular large cutterhead facing the face, and the back surface of the circular large cutterhead is provided with a supporting leg flange structure for connecting a main drive.
The main drive is a bearing combination system with rotary power drive, is arranged in the shield body and is matched with the circular large cutterhead in a bolt connection mode, rotary and forward power is provided for excavating the circular large cutterhead, and the configuration quantity of the bearing combination system is consistent with the quantity of the circular large cutterhead.
According to the preferred embodiment of the invention, the number of the circular large cutterheads is 1 or more than 2, and the circular large cutterheads are used for excavating most areas of non-circular tunnels; the specific number is configured according to the non-circular tunnel excavation face.
According to the preferred embodiment of the invention, the whole disc-shaped cutter disc is flat and disc-shaped, similar to a thicker saw disc, and the peripheral surface of the disc-shaped cutter disc is provided with a hob with the axis parallel to the axis of the disc-shaped cutter disc; when the disc cutter is driven to rotate, the circumferential surface of the cutter is provided with a hob towards the face, and the rock in the cutting blind area is cut and broken through the cutting action of the hob. In addition, the peripheral surface of the disc-shaped cutter disc can be provided with structures such as a cutting knife or a scraper, or sharp tooth-shaped structures; or a hob is not arranged, and only a skiving knife, a scraping knife or a sharp toothed structure is arranged, and the adjustment is specifically carried out according to the hardness of the tunneling rock stratum. The harder the rock layer, the better the hob effect.
According to the preferred embodiment of the invention, the disc cutter is connected to the shield body through a multi-stage swing arm structure; the multi-section swing arm comprises a left swing arm and a right swing arm which are hinged with the inner side wall of the shield body, and an upper swing arm and a lower swing arm which are hinged with the left swing arm and the right swing arm, and the dish-shaped cutter head is arranged at the front ends of the upper swing arm and the lower swing arm; the rotation driving device is arranged in the disc-shaped cutterhead and used for driving the disc-shaped cutterhead to rotate;
the left swing arm and the right swing arm are connected with a first telescopic oil cylinder; the upper swing arm and the lower swing arm are connected with a second telescopic oil cylinder;
the telescopic movement of the first telescopic oil cylinder drives the left swing arm and the right swing arm to swing left and right relative to the axis of the shield body in the horizontal direction, so that the position of the disc-shaped cutterhead in the horizontal direction is moved; the front ends of the upper swing arms and the lower swing arms swing up and down relative to the hinged positions of the upper swing arms and the lower swing arms and the left swing arms and the right swing arms through telescopic movement of the second telescopic oil cylinder, so that the position of the disc cutter disc in the height direction is moved.
According to the preferred embodiment of the invention, the number of the first telescopic cylinders is 2, the first telescopic cylinders are symmetrically connected to the two sides of the left swing arm and the right swing arm, and the first telescopic cylinders are connected between the inner wall of the shield body and the left swing arm and the right swing arm; the second telescopic oil cylinder is connected between the inner wall of the shield body and the upper swing arm and the lower swing arm.
It should be noted that, the specific implementation manner of the present invention is not limited to the "multi-stage swing arm structure" of the left and right swing arms and the up and down swing arms, and is not limited to the power mechanism of the first (left and right) telescopic cylinder and the second (up and down) telescopic cylinder, so long as the disc cutter can freely move in the horizontal direction and the height direction and maintain good stability, and any structural design and power implementation means that can implement "moving scanning" type complementary cutting for the corresponding cutting blind area should be covered in the scope of the present invention.
In a second aspect, the invention also relates to an excavation system comprising a non-circular rock tunnel boring machine of any of the embodiments described above.
(III) beneficial effects
(1) The invention adopts the disc-shaped cutterhead which can move left and right and up and down to realize the movable 'scanning' type supplementary cutting of the left blind area which can not be cut by the circular large cutterhead which plays a main excavation function, has no cutting blind area, and is beneficial to smoothly completing the excavation operation of a non-circular rock tunnel in harder stratum such as the rock tunnel.
(2) Compared with a cutting roller structure arranged on the side wall of the front end of the shield body, the disc cutter head has stronger cutting power, and is beneficial to development of tunneling operation in harder strata such as a rock tunnel.
(3) The invention adopts the disc-shaped cutterhead capable of moving left and right, and can push rock slag excavated by the circular large cutterhead and the disc-shaped cutterhead to the screw conveyor areas at the bottom of the inner side of the shield body at two sides so as to facilitate slag discharge of the screw conveyor.
(4) The disc cutter head is provided with the rotation driving device, so that the disc cutter head actively rotates and has a higher cutting force, and the disc cutter head can collide with a part of harder rock stratum and shake away dregs by matching with the characteristic of left-right/up-down swinging of the disc cutter head under the action of the first telescopic oil cylinder or the second telescopic oil cylinder, thereby further improving the capability of the heading machine for cutting the hard rock stratum and improving the working efficiency of the heading machine.
Drawings
FIG. 1 is a schematic illustration of the non-circular rock tunnel profile of the present invention.
Fig. 2 is a front view of the heading machine of the non-circular rock tunnel of the present invention.
FIG. 3 is a schematic view of a tunneling machine excavation longitudinal section of a non-circular rock tunnel of the present invention.
Fig. 4 is a schematic view of the vertical swing of the dished cutterhead of the present invention.
Fig. 5 is a schematic view of the horizontal swing of the dished cutterhead of the present invention.
Detailed Description
The invention will be better explained by the following detailed description of the embodiments with reference to the drawings.
As shown in fig. 1, is a tunneling section of an elliptical rock tunnel profile. The oval tunnel 6 has a cross section with a height H and a length L. In order to realize the excavation and tunneling of the non-circular rock tunnel, one end of the tunneling machine facing the tunnel face is required to be provided with two circular large cutterheads with the radius of D (D=1/2H), the two circular large cutterheads are arranged side by side and partially overlapped to generate a section of overlapping area, and in addition, an area which cannot be cut by the upper circular large cutterhead and the lower circular large cutterhead is generated to form a cutting blind area 7. The cutting blind area 7 is positioned between two circular large cutterheads, is approximately triangular, and has a height h and a width l.
As shown in fig. 2-3, a heading machine is designed for the present invention in order to implement the oval tunnel 6 shown in fig. 1. Mainly comprises a circular large cutterhead 1, a dished cutterhead 2, a shield body 3, a main drive 4, a screw conveyor 5 and the like. The circular large cutterhead 1 is a circular heavy steel structure, a hob 101, a cutter 102 and the like are arranged on the steel structure, a circular section with the diameter D can be excavated, and a supporting leg flange 103 is arranged on the back of the circular large cutterhead and used for connecting a main drive 4. Under the rotation and the propulsion of the main drive 4, the hob 101 rolls and crushes rock strata to form rock slag, the outer diameter D of the rock slag is formed by excavation, the outer diameter D is identical to the tunnel height H, after the two circular large cutterheads 1 are excavated, the excavation sections of the two circular large cutterheads form a double-circle section, and the distance between the horizontal farthest points of the double circles is L. The cutting knife 102 is configured to scrape the rock slag broken by the hob onto the back of the circular large cutterhead 1, and the rock slag is conveyed out of the excavation bin by the screw conveyor 5. Because the rotary excavation of the circular large cutter head 1 is not covered, two specific cutting blind areas 7 are formed in the area outside the double-circle section, and the shape of the cutting blind areas is a triangle with the base length of l and the height of h.
The number of the circular large cutterheads 1 is mainly 2 in the present embodiment according to the non-circular tunnel excavation face configuration. The circular large cutterhead 1 is used for excavating most areas of the non-circular tunnel 6 in advance. The main drive 4 is a bearing combination system with rotary power drive, is arranged in the shield body 3, is matched with the supporting leg flange 103 of the circular large cutterhead 1 in a bolt connection mode, and provides rotary torque and transmits propulsion power for excavating rock strata of the circular large cutterhead 1. The number of the main drives 4 is consistent with that of the circular large cutterheads 1, and the back of one circular large cutterhead 1 is connected with one main drive 4.
The whole disc cutter 2 is flat disc-shaped, is similar to a saw disc structure with thickened thickness, the disc cutter 2 is arranged behind the circular large cutter 1, a hob 201 is arranged on the circumferential surface (outer edge) of the saw disc structure, and the hob 201 has the same rock breaking capacity as the hob 101 on the circular large cutter 1 in a similar parameter. The disc cutter 2 has an outer diameter d, and a rotation driving device 202 is disposed inside the disc cutter 2. The rotation driving device 202 may drive the disc cutter 2 to rotate. And a plurality of disc-shaped cutterheads 2 are configured according to the situation of cutting blind areas after the large circular cutterhead 1 is excavated and are used for excavating cutting blind areas 7 which cannot be excavated by the large circular cutterhead.
As shown in fig. 2-3, the shield body 3 is a steel shell structure matched with the outline of the non-circular rock tunnel 6, and is internally provided with a main drive 4, a screw conveyor 5, a dished cutter head 2 and the like. In addition, a rotation driving device 202, a left-right movement driving mechanism, an up-down driving mechanism, and the like, which act on the disc cutter 2, are also provided in the shield body 3. The screw conveyor 5 is a muck conveying device provided with helical blades, and is generally arranged at the bottom of the shield body 3 and is used for conveying muck excavated by the circular large cutterhead 1 and the dish-shaped cutterhead 2 out of the excavation bin.
As shown in fig. 4 and 5, the disc cutter 2 is designed for the cutting dead zone 7. Since the number of cutting blind areas 7 in the embodiment shown in fig. 1 is 2, the number of disc cutterheads 2 to be set is also two, and they are respectively set in the corresponding areas of the upper and lower cutting blind areas 7 of the non-circular rock tunnel 6. In other embodiments, for example, when a tunnel with a square section (with a side length of 2D) is to be excavated, 1 large circular cutterhead 1 with a radius of D may be configured, and 4 cutting blind areas may be generated at four corners of the large circular cutterhead 1, and at least 4 disc cutterheads should be configured.
As shown in fig. 4-5, a high-power driving device 202 is arranged inside the disc cutter 2 and can drive the disc cutter 2 to rotate, so as to provide autonomous rotation power for the hob 201 arranged at the outer edge to excavate the rock strata of the broken cutting dead zone 7. The disc cutter is provided with a two-stage swing arm structure, a first-stage swing arm 203 (namely a left swing arm and a right swing arm) of the disc cutter is hinged with the inside of the shield body 3 by adopting a pin shaft structure 204, two sides of the first-stage swing arm 203 are provided with horizontal swing oil cylinders 205 (first telescopic oil cylinders), and each specific left and right swing angle A (shown in fig. 4) in the horizontal direction of the disc cutter 2 can be realized through the telescopic action of the horizontal swing oil cylinders 205, so that the horizontal range with the width of l of a cutting blind area 7 is covered; the second-stage swing arm 206 (up-down swing arm) is hinged with the first-stage swing arm 203 by adopting a pin shaft structure 204, and is provided with a vertical swing oil cylinder 207 (second telescopic oil cylinder), and the up-down swing of the dish-shaped cutter head 2 in the vertical direction can be realized by the telescopic action of the vertical swing oil cylinder 207 by a specific angle B (shown in fig. 5), so that the vertical range of the cutting blind area 7 with the height h is covered. When the heading machine works, the internal driving device 202 of the disc cutter 2 drives the disc cutter 2 to actively rotate, and meanwhile, the scanning type excavation of the whole range of the cutting blind area 7 can be completed by combining the linkage work of the two-stage swing arm structure. The upper disc cutter head 2 and the lower disc cutter head 2 work simultaneously, so that the excavation of two cutting blind areas 7 can be realized. The disc cutter 2 positioned at the bottom below the shield body 3 pushes the rock slag excavated by the circular large cutter 1 and the disc cutter 2 to the areas of the screw conveyors 5 at the two sides when horizontally swinging, so that the screw conveyors 5 slag. The horizontal swing cylinders 205 are symmetrically connected to the left and right sides of the first-stage swing arm 203, and the vertical swing cylinders 207 are connected to the side of the second-stage swing arm 206 close to the inner wall of the shield body. Because the main reaction load is in the rotation direction of the disc cutter 2 in the process of cutting the rock stratum by rotating the disc cutter 2, two horizontal swinging oil cylinders 205 are arranged, so that the disc cutter 2 is more stable.
It should be noted that, the specific implementation manner of the present invention is not limited to the "multi-stage swing arm structure" of the left and right swing arms and the up and down swing arms, and is not limited to the power mechanism of the first (left and right) telescopic cylinder and the second (up and down) telescopic cylinder, so long as the disc cutter can freely move in the horizontal direction and the height direction and maintain good stability, and any structural design and power implementation means that can implement "moving scanning" type complementary cutting for the corresponding cutting blind area should be covered in the scope of the present invention.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (9)
1. A non-circular rock tunnel boring machine, comprising: the shield body is provided with a front end which is used for facing the tunneling face, the front end of the shield body is provided with at least one circular large cutterhead, a cutting blind area is formed around the circular large cutterhead, and a disc cutterhead is further arranged at the cutting blind area; the axis of the disc-shaped cutterhead is perpendicular to the axis of the circular large cutterhead; the disc-shaped cutterhead is positioned at the rear of the circular large cutterhead; the disc cutter is driven by a rotation driving device to rotate along the axis of the disc cutter; in the rotating process, the circumferential surface of the disc-shaped cutter head faces the palm face, and rock in the cutting blind area is cut and crushed through rotation;
the disc cutter is arranged at the inner side of the shield body, can move left and right in the horizontal direction by being driven by a left and right movement driving mechanism, and can move up and down by being driven by an up and down driving mechanism, so that the collection of sites reached by the disc cutter covers the cutting blind area.
2. The non-circular rock tunnel boring machine according to claim 1, wherein the shield body is a steel shell structure matched with the outline of the non-circular rock tunnel, a main drive and a screw conveyor for driving the circular large cutterhead to rotate are arranged in the shield body, and the disc cutterhead, a rotation drive device acting on the disc cutterhead, a left-right movement drive mechanism and an up-down drive mechanism are also arranged in the shield body.
3. The non-circular rock tunnel boring machine according to claim 1, wherein the screw conveyor is a muck conveying device with screw blades arranged inside, and the muck conveying device is arranged at the bottom position inside a shield body and is used for transferring muck excavated by the circular large cutterhead and the disc cutterhead.
4. The non-circular rock tunnel boring machine of claim 1 wherein the circular cutterhead is configured with hob cutters and cutting blades; the hob and the cutting knife are positioned on one side of the circular large cutterhead facing the face, and the back surface of the circular large cutterhead is provided with a supporting leg flange structure for connecting a main drive.
5. The non-circular rock tunnel boring machine according to claim 4, wherein the number of circular large cutterheads is 1 or 2 or more; the number of the main drives is consistent with that of the circular large cutterheads.
6. A non-circular rock tunnelling machine as claimed in any one of claims 1 to 5 wherein the disc cutter is generally flat and disc-shaped, resembling a thicker saw disc, with a hob being provided on the peripheral surface of the disc cutter, the axis of the hob being parallel to the axis of the disc cutter; when the disc cutter is driven to rotate, the circumferential surface of the cutter is provided with a hob towards the face, and the rock in the cutting blind area is cut and broken through the cutting action of the hob.
7. The non-circular rock tunnel boring machine according to claim 6, wherein the disc cutter is connected to the shield body through a multi-stage swing arm structure; the multi-section swing arm comprises a left swing arm and a right swing arm which are hinged with the inner side wall of the shield body, and an upper swing arm and a lower swing arm which are hinged with the left swing arm and the right swing arm, and the dish-shaped cutter head is arranged at the front ends of the upper swing arm and the lower swing arm; the rotation driving device is arranged in the disc-shaped cutterhead and used for driving the disc-shaped cutterhead to rotate;
the left swing arm and the right swing arm are connected with a first telescopic oil cylinder; the upper swing arm and the lower swing arm are connected with a second telescopic oil cylinder;
the telescopic movement of the first telescopic oil cylinder drives the left swing arm and the right swing arm to swing left and right relative to the axis of the shield body in the horizontal direction, so that the position of the disc-shaped cutterhead in the horizontal direction is moved; the front ends of the upper swing arms and the lower swing arms swing up and down relative to the hinged positions of the upper swing arms and the lower swing arms and the left swing arms and the right swing arms through telescopic movement of the second telescopic oil cylinder, so that the position of the disc cutter disc in the height direction is moved.
8. The non-circular rock tunnel boring machine according to claim 7, wherein the number of the first telescopic cylinders is 2, the first telescopic cylinders are symmetrically connected to two sides of the left and right swing arms, and the first telescopic cylinders are connected between the inner wall of the shield body and the left and right swing arms; the second telescopic oil cylinder is connected between the inner wall of the shield body and the upper swing arm and the lower swing arm.
9. An excavation system comprising the non-circular rock tunnel boring machine of any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310354339.0A CN116378689A (en) | 2023-03-31 | 2023-03-31 | Non-circular rock tunnel boring machine and excavation system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310354339.0A CN116378689A (en) | 2023-03-31 | 2023-03-31 | Non-circular rock tunnel boring machine and excavation system thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116378689A true CN116378689A (en) | 2023-07-04 |
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ID=86974599
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310354339.0A Pending CN116378689A (en) | 2023-03-31 | 2023-03-31 | Non-circular rock tunnel boring machine and excavation system thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116378689A (en) |
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2023
- 2023-03-31 CN CN202310354339.0A patent/CN116378689A/en active Pending
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