CN112431603B - Composite type micro TBM construction method and micro TBM - Google Patents
Composite type micro TBM construction method and micro TBM Download PDFInfo
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- CN112431603B CN112431603B CN202011392103.9A CN202011392103A CN112431603B CN 112431603 B CN112431603 B CN 112431603B CN 202011392103 A CN202011392103 A CN 202011392103A CN 112431603 B CN112431603 B CN 112431603B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21D9/087—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 rotary drilling-head cutting simultaneously the whole cross-section, i.e. full-face machines
- E21D9/0873—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 rotary drilling-head cutting simultaneously the whole cross-section, i.e. full-face machines the shield being provided with devices for lining the tunnel, e.g. shuttering
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/08—Lining with building materials with preformed concrete slabs
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/08—Lining with building materials with preformed concrete slabs
- E21D11/083—Methods or devices for joining adjacent concrete segments
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21D9/0621—Shield advancing devices
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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 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)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses a composite type micro TBM construction method and a micro TBM, wherein the method comprises the following steps: 1) excavating an originating hole; 2) assembling the micro TBM; 3) excavating a cutter head, and pushing an oil cylinder to push a TBM machine head; 4) installing a pipe piece, pushing the pipe piece by a propulsion oil cylinder, and performing TBM pipe jacking tunneling; 5) completing pipe jacking construction for crushing surrounding rocks; 6) and (4) repeating the step 3) to carry out TBM construction after the surrounding rock is crushed. The miniature TBM comprises a TBM head (1) and a trolley mechanism (2), wherein a propelling supporting mechanism (3) is arranged between the TBM head (1) and the trolley mechanism (2), and the front end of the propelling supporting mechanism (3) is propped against the rear end of the TBM head (1). The invention can realize the TBM excavation of a small-section tunnel of 3 meters or less, creates favorable conditions for grouting consolidation of broken surrounding rock, and simultaneously provides two construction modes of small-section TBM excavation construction, thereby improving the construction efficiency, shortening the construction period and reducing the cost.
Description
Technical Field
The invention relates to a composite type micro TBM construction method and a micro TBM.
Background
At present, TBM is more and more widely applied to the fields of underground engineering such as railway and highway tunnels, hydraulic and electric power transmission tunnels, coal mine rock roadways and the like. However, the existing TBM is mainly used for tunnel excavation construction of large and medium-sized sections and hydraulic and hydroelectric engineering, and the construction of small sections is mainly carried out by adopting a traditional drilling and blasting method, so that the shape of the section of the tunnel is difficult to control, the stability of a cavern is poor, the excavation progress is slow, and the construction period is long.
The existing TBM mainly comprises a TBM machine head, a propulsion system and a trolley system, wherein the propulsion mechanism of the TBM is positioned in front of the whole equipment, the occupied space is particularly large, and the propulsion mechanism with the structure is only suitable for tunnel construction with a large section. For the tunnel with small section, if the existing propelling mechanism is adopted, the occupied tunnel space is too large, the material cannot be transported, the construction cost is increased, and the construction period is prolonged.
The invention patent application named as 'a TBM propelling mechanism structure and device' is disclosed in CN110374613A, and comprises a propelling mechanism and an anti-torsion spring plate arranged on the propelling mechanism; the device applying the propelling mechanism structure also comprises a front main beam, a hinged seat, a tightening device, a left supporting shoe, a right supporting shoe and a propelling sliding beam; the front main beam is fixedly connected with the propelling sliding beam, and the tightening device is arranged on the propelling sliding beam and can slide back and forth along the propelling sliding beam; the left supporting boot and the right supporting boot are respectively hinged on the tightening device; one end of the propelling mechanism is rotatably connected with the front main beam, and the other end of the propelling mechanism is hinged with the corresponding left supporting shoe or right supporting shoe; although the propelling mechanism can propel the TBM head, the propelling mechanism of the structure is provided with two groups of propelling mechanisms on the front main beam, and the structure still has the problem of large occupied space.
Disclosure of Invention
The invention aims to provide a composite micro TBM construction method and a micro TBM, which can be constructed in a small-section tunnel and occupy small space.
The invention aims to realize the technical scheme that the composite type micro TBM construction method comprises the following steps:
1) excavating an initial hole at one end of the tunnel by a drilling and blasting method, wherein the initial hole is excavated along the center line of the tunnel, the diameter of the initial hole is slightly larger than that of the micro TBM, the length of the initial hole can accommodate the TBM, and the wall of the initial hole meets the requirement that the TBM supports the boot and tightly supports the boot;
2) pushing the assembled micro TBM into the starting hole;
3) a shoe supporting mechanism of the micro TBM tightly supports the wall of the tunnel, a cutter head excavates, a propulsion oil cylinder propels a TBM machine head to carry out TBM method tunneling construction, and the construction is carried out along the center line of the tunnel through a guide mechanism carried by the micro TBM;
4) excavating surrounding rock, crushing, installing a duct piece after a miniature TBM (tunnel boring machine) propulsion oil cylinder is retracted, propelling the duct piece by the propulsion oil cylinder, and excavating a TBM (tunnel boring machine) jacking pipe;
5) after the propulsion oil cylinder is completely extended out, repeating the step 4) to finish the pipe jacking construction for crushing the surrounding rock;
6) and (3) after the surrounding rock is crushed, the supporting shoe and the propulsion oil cylinder move forwards, and the TBM construction is carried out by repeating the step 3).
In the step 1), the initial tunnel is excavated into a city gate tunnel type, and the walking part of the supporting shoe is in a circular arc shape.
In the step 2), the micro TBM is pushed to the starting hole through the stepping device, the stepping device is placed at the bottom of the micro TBM during assembly, the micro TBM is transported to the starting hole through the mechanism movement of the stepping device after assembly is finished, and the stepping device is left in the starting hole after TBM tunneling is started.
Further, in the step 4), the duct piece is composed of 3-5 prefabricated blocks, is assembled into a ring shape and is tightly attached to the surrounding rock; the segments are annularly assembled and connected by bolts.
In the step 6), the supporting shoes and the propulsion oil cylinder are driven by self power or a winch to move forwards, meanwhile, the supporting forward movement is driven, and the supporting shoes are supported inside the duct piece.
The utility model provides a miniature TBM, includes TBM aircraft nose and platform truck mechanism be provided with between TBM aircraft nose and the platform truck mechanism and impel supporting mechanism, impel supporting mechanism's front end top in the rear end of TBM aircraft nose.
The TBM machine head comprises a shield, wherein a support frame is arranged in the shield, and an inner spiral cylinder is arranged on the outer surface of the support frame and positioned in the shield; the rear end of the outer wall of the support frame is provided with a slag hole communicated with the rear end of the inner spiral cylinder; a cutter head is arranged at the front end of the support frame, a gearbox is arranged at the center of the rear end face of the cutter head, a motor A is arranged at the rear end of the gearbox, and the gearbox and the motor A are both positioned in the support frame; the outer wall of the inner spiral cylinder is provided with a gear ring, the support frame is provided with a motor B, the output end of the motor B is provided with a gear, and the gear is meshed with the gear ring.
Further, the support frame comprises a support cylinder, and a support ring A and a support ring B which are connected with the support cylinder are respectively arranged at the front end and the rear end of the support cylinder; the motor B is arranged on the side wall of the support ring B, and the slag hole is positioned at the rear end of the support cylinder.
Further described, the propelling and supporting mechanism comprises a propelling device, a fixing ring A and a fixing ring B are respectively arranged at the front end and the rear end of the propelling device, a shoe supporting mechanism is arranged on the outer side of the fixing ring B, and the shoe supporting mechanism is connected with the outer side of the fixing ring B through a guide mechanism.
The propulsion device comprises at least two symmetrically arranged propulsion oil cylinders, and the front ends and the rear ends of the propulsion oil cylinders are respectively connected with the opposite end faces of the fixing rings A and the fixing rings B.
In order to obtain larger propelling force, four propelling oil cylinders are uniformly distributed between the fixing ring A and the fixing ring B; the front ends and the rear ends of the four propulsion oil cylinders are respectively connected with the opposite end faces of the fixing ring A and the fixing ring B.
Further, the shoe supporting mechanism includes at least two oppositely arranged supporting shoes, the supporting shoes correspond to the upper portion or the lower portion of the fixing ring B, the two oppositely arranged supporting shoes are connected through a supporting shoe oil cylinder, and the supporting shoes are connected with the outer side of the upper portion of the fixing ring B through a guiding mechanism.
In order to enable the supporting to be firmer, the number of the supporting shoes is four, the supporting shoes are arranged in an annular mode, the adjacent supporting shoes are connected through supporting shoe oil cylinders, and the four supporting shoes are connected with the outer side of the fixing ring B through a guide mechanism.
In order to obtain larger outward thrust and supporting force, the adjacent supporting shoes are connected through two supporting shoe oil cylinders which are arranged in pairs.
Further describing, in order to facilitate guiding, the guide mechanism comprises a wedge block, the wedge block is vertically arranged, the upper end of the wedge block is connected with the outer side of the fixing ring B, and the lower end of the wedge block penetrates into a guide hole formed in the supporting boot.
Further, in the present invention, the trolley mechanism includes a trolley body, a conveyor belt is disposed on the trolley body, one end of the conveyor belt passes through the pushing support mechanism and the support cylinder, and the slag hole corresponds to the conveyor belt.
By adopting the technical scheme, the construction method has the advantages of simplicity, high safety and small occupied space, can realize the TBM excavation of a small-section tunnel of 3 meters or less, ensures the construction safety and good operation environment, reduces the slag stone cleaning, creates favorable conditions for grouting and consolidation of broken surrounding rocks, can be used for quickly and conveniently constructing in the small-section tunnel, provides two construction modes of the small-section TBM excavation construction, improves the construction efficiency, shortens the construction period and reduces the cost.
Drawings
The drawings of the invention are illustrated as follows:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of the TBM head structure of the present invention;
FIG. 3 is a cross-sectional view of FIG. 2;
FIG. 4 is a half-sectional perspective view of FIG. 2;
FIG. 5 is a schematic view of the supporting frame of the present invention;
FIG. 6 is a schematic view of the propulsion support mechanism of the present invention;
fig. 7 is a reference view showing a use state of the propulsion support mechanism of the present invention.
Detailed Description
The following detailed description of the embodiments of the present invention is provided in conjunction with the accompanying drawings, but the present invention is not limited to these embodiments, and any modifications or substitutions in the basic spirit of the embodiments are still within the scope of the present invention claimed in the claims.
Example 1: a construction method of a composite type micro TBM comprises the following steps:
1) excavating an initial tunnel at one end of the tunnel by a drilling and blasting method, excavating the initial tunnel along the center line of the tunnel, wherein the diameter of the initial tunnel is slightly larger than that of a miniature TBM, the length of the initial tunnel can accommodate the TBM, and the wall of the tunnel meets the requirements of supporting the boot and the tightness of the TBM;
2) pushing the assembled micro TBM into the starting hole;
3) a shoe supporting mechanism of the micro TBM tightly supports the wall of the tunnel, a cutter head excavates, a propulsion oil cylinder propels a TBM machine head to carry out TBM method tunneling construction, and the construction is carried out along the center line of the tunnel through a guide mechanism carried by the micro TBM;
4) excavating surrounding rock, crushing, installing a duct piece after a miniature TBM (tunnel boring machine) propulsion oil cylinder is retracted, propelling the duct piece by the propulsion oil cylinder, and excavating a TBM (tunnel boring machine) jacking pipe;
5) after the propulsion oil cylinder is completely extended out, repeating the step 4) to finish the pipe jacking construction for crushing the surrounding rock;
6) and (3) after the surrounding rock is crushed, the supporting shoe and the propulsion oil cylinder move forwards, and the TBM construction is carried out by repeating the step 3).
In the step 1), the initial tunnel is excavated into a city gate tunnel type, and the walking part of the supporting shoe is in a circular arc shape.
In the step 2), the micro TBM is pushed to the starting hole through the stepping device, the stepping device is arranged at the bottom of the micro TBM during assembly, the micro TBM is transported to the starting hole through the mechanism movement of the stepping device after the assembly is finished, and the stepping device is left in the starting hole after the TBM starts to tunnel.
In the step 4), the duct piece is composed of 3-5 prefabricated blocks, assembled into a ring shape and tightly attached to the surrounding rock; the segments are annularly assembled and connected by bolts.
In the step 6), the supporting shoes and the propulsion oil cylinder are driven by self power or a winch to move forwards, meanwhile, the supporting forward movement is driven, and the supporting shoes are supported inside the duct piece.
As shown in fig. 1, the micro TBM comprises a TBM head 1 and a trolley mechanism 2, wherein a propelling support mechanism 3 is arranged between the TBM head 1 and the trolley mechanism 2, and the front end of the propelling support mechanism 3 is supported against the rear end of the TBM head 1.
As shown in fig. 2, 3 and 4, the TBM head comprises a shield 4, a support frame 5 is arranged in the shield 4, and an inner spiral cylinder 6 is arranged on the outer surface of the support frame 5 and in the shield 4; the rear end of the outer wall of the support frame 5 is provided with a slag hole 7 communicated with the rear end of the inner spiral cylinder 6; a cutter head 8 is arranged at the front end of the support frame 5, a gearbox 9 is arranged at the center of the rear end face of the cutter head 8, a motor A10 is arranged at the rear end of the gearbox 9, and the gearbox 9 and the motor A10 are both positioned in the support frame 5; the outer wall of the inner spiral cylinder 6 is provided with a gear ring 11, the support frame 5 is provided with a motor B12, the output end of the motor B12 is provided with a gear 13, and the gear 13 is meshed with the gear ring 11.
As shown in fig. 5, further describing, the supporting frame 5 comprises a supporting cylinder 14, and a supporting ring a15 and a supporting ring B16 connected with the supporting cylinder 14 are respectively arranged at the front end and the rear end of the supporting cylinder 14; the motor B12 is arranged on the side wall of the support ring B16, and the slag hole 7 is located at the rear end of the support cylinder 14.
In the invention, the power of the motor A10 drives the cutter head 8 to rotate through the gearbox 9, so that the rocks are excavated, the excavated rocks and soil enter the inner spiral cylinder 6, the inner spiral cylinder 6 rotates under the drive of the motor B12, the gear 13 and the gear ring 11, the rocks and soil are discharged onto the conveyer belt 24 through the slag hole 7, and the rocks and soil are conveyed outwards through the conveyer belt 24.
In the invention, when the surrounding rock is in a good condition, the propelling and supporting mechanism 3 is pushed into the TBM machine head 1 for tunneling construction. When surrounding rock is broken, the propelling support mechanism 3 is separated from the TBM head 1, a duct piece can be arranged between the propelling support mechanism and the TBM head, and the duct piece is jacked for tunneling construction; or the supporting mechanism 3 is pushed to retreat, the tunnel is supported in advance in the reserved space, and the tunnel is normally tunneled after being reinforced.
Wherein, the propulsion supporting mechanism 3 adopts full circle support to provide counter force for the propulsion oil cylinder; the shoe supporting mechanism is retracted and can move in the tunnel or the pipe piece (or move by adopting a winch) through the propulsion oil cylinder 19 and the fixing ring B18; the supporting shoe 20 is tightly supported and can be fixed on surrounding rocks or a pipe piece; the fixing ring A17 can be pushed into the TBM handpiece 1 to advance, and can also be pushed into the splicing frame to advance the pipe piece and the handpiece to advance.
As shown in fig. 6 and 7, in the present invention, the propelling support mechanism includes a propelling device, a fixing ring a17 and a fixing ring B18 are respectively provided at a front end and a rear end of the propelling device, and a shoe supporting mechanism is provided outside the fixing ring B18, and is connected to the outside of the fixing ring B18 via a guide mechanism.
In order to obtain larger propelling force, the propelling device comprises at least two symmetrically arranged propelling cylinders 19, and the front ends and the rear ends of the propelling cylinders 19 are respectively connected with the opposite end surfaces of the fixing ring A17 and the fixing ring B18.
Further describing, the number of the propulsion cylinders 19 is four, and the propulsion cylinders are uniformly distributed between a fixed ring A17 and a fixed ring B18; the front and rear ends of the four thrust cylinders 19 are connected to the opposite end faces of the fixed ring a17 and the fixed ring B18, respectively.
In the present invention, the shoe supporting mechanism includes at least two oppositely disposed supporting shoes 20, the supporting shoes 20 correspond to the upper or lower portion of the fixing ring B18, the two oppositely disposed supporting shoes 20 are connected by a supporting shoe cylinder 21, and the supporting shoes 20 are connected to the outer side of the upper portion of the fixing ring B18 by a guide mechanism.
In order to make the support more firm and obtain a more balanced support, the supporting shoes 20 are four and are arranged annularly, the adjacent supporting shoes 20 are connected by the supporting shoe oil cylinder 21, and the four supporting shoes 20 are all connected with the outer side of the fixing ring B18 by a guide mechanism.
Further, in order to obtain a large outward thrust and supporting force, the adjacent shoes 20 are connected by two shoe cylinders 21 arranged in pairs.
For the convenience of guiding, the guide mechanism comprises a wedge block 22, the wedge block 22 is vertically arranged, the upper end of the wedge block 22 is connected with the outer side of the fixing ring B18, and the lower end of the wedge block 22 penetrates into a guide hole 23 formed in the supporting shoe 20.
The invention works as follows: when the supporting shoe oil cylinder 21 works and extends outwards, the supporting shoe 20 is supported out until the surrounding rock is tightly supported, so that a counterforce is provided for propulsion. The propelling oil cylinder 19 is arranged between the fixing ring A17 and the fixing ring B18, the supporting shoe 20 is tightly supported, the propelling oil cylinder 19 extends out, the fixing ring A17 moves forwards, and the TBM nose 1 is pushed to tunnel forwards; after the push, the supporting shoe 20 retracts, the fixing ring A17 is fixed, the push oil cylinder 19 retracts, the fixing ring B18 is dragged to retract, and the push supporting mechanism moves forwards repeatedly.
In the invention, the shoe supporting oil cylinder 21 can be vertically arranged or horizontally arranged.
In the invention, the trolley mechanism 2 comprises a trolley body, a conveying belt 24 is arranged on the trolley body, one end of the conveying belt 24 penetrates through the propelling support mechanism and penetrates through the support cylinder 14, and the slag hole 7 corresponds to the conveying belt 24.
Claims (13)
1. A construction method of a composite type micro TBM is characterized by comprising the following steps:
1) excavating an initial hole at one end of the tunnel by a drilling and blasting method, wherein the initial hole is excavated along the center line of the tunnel, the diameter of the initial hole is slightly larger than that of the micro TBM, the length of the initial hole can accommodate the TBM, and the wall of the initial hole meets the requirement that the TBM supports the boot and tightly supports the boot;
2) pushing the assembled micro TBM into the starting hole;
wherein, including TBM aircraft nose (1) and platform truck mechanism (2), characterized by: a propelling support mechanism (3) is arranged between the TBM head (1) and the trolley mechanism (2), and the front end of the propelling support mechanism (3) is propped against the rear end of the TBM head (1);
the TBM machine head comprises a shield (4), a support frame (5) is arranged in the shield (4), and an inner spiral cylinder (6) is arranged on the outer surface of the support frame (5) and positioned in the shield (4); a slag hole (7) communicated with the rear end of the inner spiral cylinder (6) is formed in the rear end of the outer wall of the support frame (5); a cutter head (8) is arranged at the front end of the support frame (5), a gearbox (9) is arranged at the center of the rear end face of the cutter head (8), a motor A (10) is arranged at the rear end of the gearbox (9), and the gearbox (9) and the motor A (10) are both positioned in the support frame (5); a gear ring (11) is arranged on the outer wall of the inner spiral cylinder (6), a motor B (12) is arranged on the support frame (5), a gear (13) is arranged at the output end of the motor B (12), and the gear (13) is meshed with the gear ring (11);
the supporting frame (5) comprises a supporting cylinder (14), and a supporting ring A (15) and a supporting ring B (16) which are connected with the supporting cylinder (14) are respectively arranged at the front end and the rear end of the supporting cylinder (14); the motor B (12) is arranged on the side wall of the support ring B (16), and the slag hole (7) is positioned at the rear end of the support cylinder (14);
3) a shoe supporting mechanism of the micro TBM tightly supports the wall of the tunnel, a cutter head excavates, a propulsion oil cylinder propels a TBM machine head to carry out TBM method tunneling construction, and the construction is carried out along the center line of the tunnel through a guide mechanism carried by the micro TBM;
4) excavating surrounding rock, crushing, installing a duct piece after a miniature TBM (tunnel boring machine) propulsion oil cylinder is retracted, propelling the duct piece by the propulsion oil cylinder, and excavating a TBM (tunnel boring machine) jacking pipe;
5) after the propulsion oil cylinder is completely extended out, repeating the step 4) to finish the pipe jacking construction for crushing the surrounding rock;
6) and (3) after the surrounding rock is crushed, the supporting shoe and the propulsion oil cylinder move forwards, and the TBM construction is carried out by repeating the step 3).
2. The construction method of the composite micro TBM as claimed in claim 1, wherein: in the step 1), the initial hole is excavated into a city gate hole shape, and the supporting shoe walking part is in a circular arc shape.
3. The composite type micro TBM construction method as claimed in claim 2, wherein: in the step 2), the miniature TBM is pushed to the starting hole through the stepping device, the stepping device is arranged at the bottom of the miniature TBM during assembly, the miniature TBM is transported to the starting hole through the mechanism movement of the stepping device after the assembly is finished, and the stepping device is left in the starting hole after the TBM starts to tunnel.
4. The composite micro TBM construction method as claimed in claim 3, wherein: in the step 4), the duct piece is composed of 3-5 prefabricated blocks, assembled into a ring shape and tightly attached to the surrounding rock; the segments are annularly assembled and connected by bolts.
5. The construction method of the composite micro TBM as claimed in claim 4, wherein: and in the step 6), the supporting shoes and the propulsion oil cylinder move forwards under the traction of self power or a winch, and simultaneously drive the supporting front movement at the back, and the supporting shoes are supported inside the duct piece.
6. The construction method of the composite micro TBM as claimed in claim 5, wherein: the propelling and supporting mechanism comprises a propelling device, wherein the front end and the rear end of the propelling device are respectively provided with a fixing ring A (17) and a fixing ring B (18), the outer side of the fixing ring B (18) is provided with a shoe supporting mechanism, and the shoe supporting mechanism is connected with the outer side of the fixing ring B (18) through a guide mechanism.
7. The construction method of the composite micro TBM as claimed in claim 6, wherein: the propulsion device comprises at least two symmetrically arranged propulsion oil cylinders (19), and the front ends and the rear ends of the propulsion oil cylinders (19) are respectively connected with the opposite end faces of the fixing rings A (17) and the fixing rings B (18).
8. The construction method of the composite type micro TBM as claimed in claim 7, wherein: the number of the propulsion oil cylinders (19) is four, and the four propulsion oil cylinders are uniformly distributed between the fixing ring A (17) and the fixing ring B (18); the front ends and the rear ends of the four propulsion oil cylinders (19) are respectively connected with the opposite end surfaces of the fixing ring A (17) and the fixing ring B (18).
9. The construction method of the composite micro TBM as claimed in claim 8, wherein: the shoe supporting mechanism comprises at least two oppositely arranged supporting shoes (20), the supporting shoes (20) correspond to the upper portion or the lower portion of the fixing ring B (18), the two oppositely arranged supporting shoes (20) are connected through a supporting shoe oil cylinder (21), and the supporting shoes (20) are connected with the outer side of the upper portion of the fixing ring B (18) through a guide mechanism.
10. The construction method of the composite micro TBM as claimed in claim 9, wherein: the four supporting shoes (20) are annularly arranged, the adjacent supporting shoes (20) are connected through supporting shoe oil cylinders (21), and the four supporting shoes (20) are connected with the outer side of the fixing ring B (18) through a guide mechanism.
11. The construction method of the composite micro TBM as claimed in claim 10, wherein: the adjacent supporting shoes (20) are connected through two supporting shoe oil cylinders (21) which are arranged in pairs.
12. The method for constructing a composite micro TBM as claimed in claim 11, wherein: the guide mechanism comprises a wedge block (22), the wedge block (22) is vertically arranged, the upper end of the wedge block is connected with the outer side of the fixing ring B (18), and the lower end of the wedge block (22) penetrates into a guide hole (23) formed in the supporting shoe (20).
13. The method for constructing a composite micro TBM as claimed in claim 12, wherein: the trolley mechanism (2) comprises a trolley body, a conveying belt (24) is arranged on the trolley body, one end of the conveying belt (24) penetrates through the pushing supporting mechanism and penetrates through the supporting cylinder (14), and the slag hole (7) corresponds to the conveying belt (24).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011392103.9A CN112431603B (en) | 2020-12-03 | 2020-12-03 | Composite type micro TBM construction method and micro TBM |
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| CN202011392103.9A CN112431603B (en) | 2020-12-03 | 2020-12-03 | Composite type micro TBM construction method and micro TBM |
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| CN112431603B true CN112431603B (en) | 2022-07-01 |
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| CN113175326B (en) * | 2021-04-09 | 2022-08-19 | 重庆文理学院 | Automatic measurement type tunneling measuring machine for TBM construction and using method |
| CN114017456B (en) * | 2021-11-04 | 2022-07-22 | 无锡中铁城轨装备有限公司 | High-efficient damping device of shield machine |
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