CN113756827B - Bearing wheel device and TBM air-pushing stepping method based on bearing wheel device - Google Patents
Bearing wheel device and TBM air-pushing stepping method based on bearing wheel device Download PDFInfo
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- CN113756827B CN113756827B CN202111067224.0A CN202111067224A CN113756827B CN 113756827 B CN113756827 B CN 113756827B CN 202111067224 A CN202111067224 A CN 202111067224A CN 113756827 B CN113756827 B CN 113756827B
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- oil cylinder
- fixing seat
- pin shaft
- connecting pin
- bearing wheel
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Classifications
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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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
Abstract
The invention relates to a bearing wheel device and an air-pushing stepping method based on the bearing wheel device, wherein the bearing wheel device comprises: the device comprises a bearing wheel, a processing sheath, an oil cylinder assembly and a precast block; the oil cylinder assembly comprises an oil cylinder, an upper fixing seat, a lower fixing seat, an upper connecting pin shaft, a lower connecting pin shaft, an upper locking plate and a lower locking plate; the upper end of the oil cylinder is connected with the upper fixing seat through the upper connecting pin shaft; the lower end of the oil cylinder is connected with the lower fixing seat through the lower connecting pin shaft; the upper locking plate is embedded into the upper connecting pin shaft, and the lower locking plate is embedded into the lower connecting pin shaft; the processing outer sheath and the processing inner sheath form relative motion under the action of the oil cylinder assembly, the prefabricated block is connected with the oil cylinder assembly to provide reverse thrust for the oil cylinder, the TBM air-thrust stepping construction process is optimized, the phenomenon that the prefabricated block can only walk after being stopped under the original construction process condition is avoided in the actual use process, and the construction efficiency is improved.
Description
Technical Field
The invention relates to the technical field of hard rock heading machines, in particular to a bearing wheel device and a TBM air-pushing stepping method based on the bearing wheel device.
Background
After the first section of the water diversion project of the banyan river is 6.3km through, the hollow pushing step 1036m is needed to carry out secondary initial tunneling, in the initial stage of construction, the hollow pushing section is formed and the hole diameter is phi 5360 because the bearing wheel matched with equipment is only matched with phi 4300 hole diameter, and the h-steel is needed to be repeatedly padded under the bearing wheel matched with the equipment for a plurality of times because of height difference. The invention not only affects the safety of tunnel engineering and the safety of the structure, but also greatly reduces the air pushing efficiency of TBM equipment, increases the workload, keeps the air pushing within 30m-40m each day, and improves the later period, thereby greatly improving the construction efficiency, reducing the labor intensity, and having 86.5m daily average tunneling meters up to 98m.
In the initial stage of the air-pushing stepping work, the supporting shoe is considered to be incapable of supporting surrounding rock under the condition that the hole diameter is enlarged, so that counter force cannot be provided to enable the supporting shoe to step forward, on the premise that the pipe piece is used for providing the counter force, larger economic cost (8133 yuan/ring, 1.4 m per ring) can be caused, and according to research, the cost (405 yuan/ring, 0.7m per ring) can be greatly saved by using the precast block for providing the counter force, and the cost is directly saved by 542 ten thousands yuan.
Disclosure of Invention
In order to solve the technical problems, the invention provides a TBM air-pushing stepping method, which is illustrated by taking a banyan river gateway port diversion project as an example, and discovers that in the air-pushing process of TBM equipment, due to design defects, when the hole diameter is changed, the air-pushing stepping can be carried out only after an I-shaped steel is padded under a matched heavy wheel, so that the air-pushing construction efficiency is seriously influenced, and through verification, the matched heavy wheel is a welded structure, only the phi 4300 hole diameter is used, the applicability under the condition that the hole diameter is not changed is discovered, and through technical team discussion researches, the structure of the matched bearing wheel is changed, and then an oil cylinder which is vertically arranged is built in the TBM equipment, so that the applicability is increased.
In the air-pushing stepping process, the concrete construction form is as follows:
(1) In the air pushing stepping process, when in a TBM construction section, the vertically arranged oil cylinder is recovered to the shortest position, and under the action of a hydraulic lock, the bearing wheel is kept at the position and walks in the phi 4300 pipe piece;
(2) In the air pushing stepping process, when in a TBM secondary lining construction section, an oil cylinder which is vertically arranged extends out to a proper position, and under the action of a hydraulic lock, a bearing wheel is kept at the position, and the bearing wheel walks in a secondary lining hole with a hole diameter of phi 5360;
(3) On the section of the second lining, the reaction force is provided by the precast block, the pushing cylinder is pushed forward, and one block is placed for each 0.7 meter pushing, and the continuous operation is carried out.
In the implementation process of the invention, firstly, the welding process is evaluated for the adopted welding process flow, a test piece sample is prepared, and after the test piece sample is qualified, construction can be performed, and nondestructive detection is needed after welding is completed; and (3) constructing all the parts connected with the bolts by using a torque wrench, dividing each bolt into primary screwing and final screwing, and marking by using a marker pen.
According to the improved bearing wheel device for construction, the TBM air-pushing stepping construction process is optimized, the oil cylinder stroke vertically arranged in the bearing wheel is adjusted, so that the change of various hole diameter sizes can be adapted in the construction process, the situation that the bearing wheel cannot adjust the telescopic length when the hole diameter changes under the original construction process condition is avoided, after the machine is stopped every time, the height difference for compensating the change of the hole diameter is arranged below the bearing wheel, and the equipment trolley can be walked and pulled only by I-steel under the bearing wheel.
In order to solve the problems of difficult construction and low production efficiency caused by incapability of continuous operation of air-pushing stepping, the invention adopts a method for carrying out air-pushing stepping construction on a steel structure device. The invention discloses an improved bearing wheel device which can be used for continuous operation and construction under the running state of equipment in the air pushing stepping process.
Specifically, the invention provides a bearing wheel device, which comprises: the bearing wheel, the oil cylinder component and the precast block; the oil cylinder assembly comprises an oil cylinder, an upper fixing seat, a lower fixing seat, an upper connecting pin shaft, a lower connecting pin shaft, an upper locking plate and a lower locking plate which are vertically arranged;
the upper end of the vertically arranged oil cylinder is connected with the upper fixing seat through the upper connecting pin shaft; the lower end of the vertically arranged oil cylinder is connected with the lower fixing seat through the lower connecting pin shaft; the upper locking plate is embedded into the upper connecting pin shaft, and the lower locking plate is embedded into the lower connecting pin shaft;
the upper fixing seat is welded with the connecting bridge, and the lower fixing seat is welded with the bearing wheel;
the precast block can be contacted with the propulsion cylinder to provide reverse thrust for the propulsion cylinder.
Preferably, the device further comprises a processing sheath, wherein the processing sheath comprises a processing outer sheath and a processing inner sheath, one end of the processing outer sheath is welded with the connecting bridge, one end of the processing inner sheath is welded with the bearing wheel, the other end of the processing outer sheath is connected with the processing inner sheath, the processing outer sheath is sleeved on the periphery of the processing inner sheath, and the processing outer sheath and the processing inner sheath form relative movement under the action of the oil cylinder assembly;
preferably, the upper fixing seat and the lower fixing seat are both provided with a through hole and a plurality of internal thread holes, the upper end of the vertically arranged oil cylinder is provided with a through hole and a plurality of internal thread holes which are matched with the through hole and the plurality of internal thread holes of the upper fixing seat, the lower end of the vertically arranged oil cylinder is provided with a through hole and 2 internal thread holes which are matched with the through hole and the plurality of internal thread holes of the lower fixing seat, the upper connecting pin shaft penetrates through the through hole and the plurality of internal thread holes of the upper end of the upper fixing seat and the vertically arranged oil cylinder, and the lower connecting pin shaft penetrates through the through hole and the plurality of internal thread holes of the lower end of the lower fixing seat and the vertically arranged oil cylinder.
Preferably, the number of the internal threaded holes is 2, and the depth is 10mm.
Preferably, the specifications of the upper connecting pin shaft and the lower connecting pin shaft are 24mm multiplied by 100mm.
Preferably, the precast block is poured by using C30 concrete, and the precast block is 0.7m in width by using a single-layer steel bar form.
On the other hand, the invention provides a manufacturing method of the bearing wheel device, which comprises the following steps:
(1) Designing an upper fixing seat, welding and fixing the upper fixing seat on a connecting bridge, manufacturing a through hole on the upper fixing seat for connecting a vertically arranged oil cylinder, and manufacturing 2 internal threaded holes on the upper fixing seat for fixing an upper connecting pin shaft;
(2) Designing a connecting pin shaft;
(3) Designing an upper locking plate;
(4) The method comprises the steps of designing a vertically arranged oil cylinder, penetrating an upper connecting pin shaft into the upper fixing seat to fixedly connect the vertically arranged oil cylinder after the upper fixing seat is installed, and embedding an upper locking plate into the upper connecting pin shaft;
(5) Designing and processing an outer sheath, wherein one end of the outer sheath is welded with the connecting bridge;
(6) Designing and processing an inner sheath, wherein one end of the inner sheath is welded with the bearing wheel;
(7) The method comprises the steps of designing a lower fixing seat, wherein the lower fixing seat is welded with a bearing wheel, manufacturing a through hole in the lower fixing seat, connecting an oil cylinder arranged vertically, and manufacturing 2 internal threaded holes in the lower fixing seat, wherein the internal threaded holes are used for fixing a lower connecting pin shaft;
(8) Designing a lower connecting pin shaft;
(9) Designing a lower locking plate; after the installation of the lower fixing seat is completed, penetrating the lower fixing seat by using a lower connecting pin shaft to fixedly connect the vertically arranged oil cylinders, and embedding the lower locking plate into the lower connecting pin shaft;
(10) When the prefabricated block is designed on the two lining sections, the pushing cylinder steps forward under the action of the reaction force provided by the prefabricated block, and one prefabricated block is placed every step by a preset distance, and the like, and the operation is continuously performed.
The invention provides an air-pushing stepping method based on a bearing wheel device, which comprises the following steps of:
(1) When the TBM digs a secondary lining construction section, storing the precast block in a storage area, and adjusting the bearing wheel to a proper position;
(2) Extending the vertically arranged oil cylinder to a proper position, and keeping the bearing wheel at a set position under the action of the hydraulic lock;
(3) The precast block is laid at the bottom to provide a counter force for forward propulsion, and the propulsion cylinder is propelled forward.
Preferably, the method further comprises the step (4) of retracting the pushing cylinder after the empty pushing stroke is reached, placing the precast block in a retraction area, and performing empty pushing stepping again after the precast block is placed firmly until the empty pushing stepping is completed.
Preferably, in the step (3), the pushing cylinder is pushed forward, and a prefabricated block is placed every preset pushing distance, and the like, and the operation is continuously performed.
Compared with the prior art, the invention has the beneficial effects that:
(1) The invention provides an improved bearing wheel device, which optimizes the TBM air-pushing stepping construction process, avoids the phenomenon that I-steel can be made by stopping under the original construction process condition to walk in the actual use process, improves the construction efficiency, reduces the labor intensity, ensures that the average tunneling number of meters per day is 86.5m and reaches 98m at most, and can greatly save the cost (405 yuan/ring, 0.7m per ring) by using a precast block to provide counter force and directly saves the cost of 542 ten thousands yuan.
Drawings
FIG. 1 is a schematic view of a load bearing wheel assembly construction provided by the invention;
FIG. 2 is a schematic view of a load bearing wheel apparatus according to the present invention;
FIG. 3 is a schematic view of a vertically disposed cylinder according to the present invention;
FIG. 4 is a schematic view of the cylinder in a vertical arrangement according to the present invention;
FIG. 5-1 is a front view of an upper mounting bracket provided by the present invention;
FIG. 5-2 is a cross-sectional view in the direction of FIG. 5-1 A-A;
FIG. 6-1 is a cross-sectional view of an upper and lower connecting pin provided by the present invention;
FIG. 6-2 is a top view of the upper and lower connecting pins provided by the present invention;
FIG. 7-1 is a front view of an upper locking tab provided by the present invention;
FIG. 7-2 is a cross-sectional view in the direction of FIG. 7-1B-B;
FIG. 8 is a front view of a vertically disposed cylinder provided by the present invention;
FIG. 9-1 is a front view of a finished outer jacket and a finished inner jacket provided by the present invention;
FIG. 9-2 is a side view of a finished outer jacket and a finished inner jacket provided by the present invention;
fig. 9-3 are top views of a finished outer jacket and a finished inner jacket provided by the present invention;
FIG. 10-1 is a front view of a lower fixture of the present invention;
FIG. 10-2 is a cross-sectional view in the direction of FIG. 10-1C-C;
FIG. 11-1 is a front view of a lower locking tab provided by the present invention;
FIG. 11-2 is a side view of the lower locking tab provided by the present invention;
FIG. 12-1 is a front view of a prefabricated section provided by the present invention;
FIG. 12-2 is a cross-sectional view in the direction of FIG. 12-1D-D;
fig. 13 is a flowchart of the air-push stepping method provided by the invention.
The reference numerals are as follows:
1: an upper fixing seat; 2: the upper connecting pin shaft; 3: a locking plate is arranged; 4: the oil cylinder is vertically arranged; 5: processing the outer sheath; 6: processing the inner sheath; 7: a lower fixing seat; 8: a lower connecting pin shaft; 9: a lower locking plate; 10: precast blocks; 11: a second lining construction section; 12: TBM construction section.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The technical scheme adopted for solving the technical problems is as follows:
as shown in fig. 1 to 4, the present invention provides a load bearing wheel apparatus comprising: processing the sheath, the bearing wheel, the oil cylinder assembly and the precast block 10; the oil cylinder assembly comprises an oil cylinder 4, an upper fixing seat 1, a lower fixing seat 7, an upper connecting pin shaft 2, a lower connecting pin shaft 8, an upper locking plate 3 and a lower locking plate 9 which are vertically arranged;
the upper end of the vertically arranged oil cylinder 4 is connected with the upper fixing seat through the upper connecting pin shaft; the lower end of the vertically arranged oil cylinder is connected with the lower fixing seat through the lower connecting pin shaft; the upper locking plate is embedded into the upper connecting pin shaft, and the lower locking plate is embedded into the lower connecting pin shaft;
the upper fixing seat is welded with the connecting bridge, and the lower fixing seat is welded with the bearing wheel;
the prefabricated block 10 can be contacted with a thrust cylinder to provide a reverse thrust for the thrust cylinder.
The specifications of the upper connecting pin shaft and the lower connecting pin shaft are 24mm multiplied by 100mm. The precast block is poured by using C30 concrete, and is in a single-layer reinforcing steel bar form, and the width of the precast block is 0.7 meter.
The processing sheath comprises a processing outer sheath 5 and a processing inner sheath 6, one end of the processing outer sheath 5 is welded with the connecting bridge, one end of the processing inner sheath 6 is welded with the bearing wheel, the other end of the processing outer sheath is connected with the processing inner sheath, the processing outer sheath is sleeved on the periphery of the processing inner sheath, and the processing outer sheath and the processing inner sheath form relative movement under the action of the oil cylinder assembly;
specifically, all be provided with through-hole and 2 internal thread holes on the upper fixing base with down on the fixing base, wherein, the degree of depth is 10mm.
The upper end of the vertically arranged oil cylinder is provided with a through hole matched with the through hole of the upper fixing seat and 2 internal threaded holes, the lower end of the vertically arranged oil cylinder is provided with a through hole matched with the through hole of the lower fixing seat and 2 internal threaded holes, the upper connecting pin shaft penetrates through the through hole of the upper end of the upper fixing seat and the vertically arranged oil cylinder and 2 internal threaded holes, and the lower connecting pin shaft penetrates through the through hole of the lower fixing seat and the lower end of the vertically arranged oil cylinder and 2 internal threaded holes.
(1) The bearing wheel device is applied to a two-lining-section construction section 11 and a TBM construction section 12, and in the air pushing stepping process, when the TBM construction section 12 is arranged, an oil cylinder which is vertically arranged is recycled to the shortest position, and under the action of a hydraulic lock, the bearing wheel is kept at the position and walks in a phi 4300 pipe piece;
(2) In the air pushing stepping process, when in the secondary lining construction section 11, the vertically arranged oil cylinder extends out to a proper position, and under the action of a hydraulic lock, the bearing wheel is kept at the position, and the bearing wheel walks in the secondary lining hole with the hole diameter phi 5360;
(3) On the section of the second lining, the reaction force is provided by the precast block, the pushing cylinder is pushed forward, and one block is placed for each 0.7 meter pushing, and the continuous operation is carried out.
As shown in fig. 5-1-12-2, the present invention provides a method for manufacturing a bearing wheel device, which mainly includes the following steps:
(1) The oil cylinder which is arranged vertically is connected with the upper fixing seat 1. The base is fixed on the connecting bridge in a welding connection mode, a through hole with the diameter of 24mm is formed in the upper fixing seat 1 connected with the vertically arranged oil cylinder and is used for connecting the vertically arranged oil cylinder 4, and 2 internally threaded holes (M5, the depth is 10 mm) are formed in the component and are used for fixing the upper connecting pin shaft 2 of the vertically arranged oil cylinder.
(2) The oil cylinder is designed to be vertically arranged and is connected with a pin shaft 2 (the specification is phi 24mm multiplied by 100 mm). Under the action of a connecting pin shaft 2 on the vertically arranged oil cylinder, an upper fixing seat 1 of the vertically arranged oil cylinder is connected with the oil cylinder, and the upper fixing seat is fixed by an upper locking plate 3.
(3) The upper locking plate 3 is designed. After the fixing seat 1 is installed on the vertically arranged oil cylinder connection, the vertically arranged oil cylinder 4 is fixedly connected by penetrating through the vertically arranged oil cylinder upper connecting pin shaft 2, the fact that the vertically arranged oil cylinder upper connecting pin shaft 2 is scratched out and falls off in the construction process is considered, and the locking plate 3 is designed to be embedded into the vertically arranged oil cylinder upper connecting pin shaft 2 so that the locking plate 3 does not scratch out and fall off.
(4) The vertically arranged oil cylinder 4 is designed. The upper end of the vertically arranged oil cylinder 4 is connected with the vertically arranged oil cylinder connecting upper fixing seat 1 through an upper connecting pin shaft 2 of the vertically arranged oil cylinder, and the lower end of the vertically arranged oil cylinder 4 is connected with the vertically arranged oil cylinder connecting lower fixing seat 7 through an oil cylinder lower connecting pin shaft 8.
(5) The outer sheath 5 is designed and processed. One end of the processing outer sheath 5 is welded with the connecting bridge, and the processing outer sheath 5 and the processing inner sheath 6 form relative movement under the action of the vertically arranged oil cylinder 4, so that the applicability of bearing wheel construction is improved and the construction efficiency is improved when the hole diameter is changed.
(6) The inner sheath 6 is designed and processed. One end of the processing inner sheath 6 is welded with the bearing wheel, and the processing outer sheath 5 and the processing inner sheath 6 form relative movement under the action of the oil cylinder 4) which is vertically arranged, so that the applicability of the construction of the bearing wheel is increased and the construction efficiency is improved when the hole diameter is changed.
(7) The oil cylinder which is vertically arranged is designed to be connected with the lower fixing seat 7. The lower fixing seat 7 connected with the vertically arranged oil cylinder is connected with heavy wheels in a welding connection mode, a phi 24mm through hole is formed in the lower fixing seat 7 connected with the vertically arranged oil cylinder and used for connecting the vertically arranged oil cylinder 4, and 2 internal threaded holes (M5, the depth is 10 mm) are formed in the member and used for fixing the lower connecting pin shaft 8 of the vertically arranged oil cylinder.
(8) The lower connecting pin shaft 8 (with the specification of phi 24mm multiplied by 100 mm) of the oil cylinder is designed to be vertically arranged. Under the action of a vertically arranged cylinder lower connecting pin shaft 8, connecting a vertically arranged cylinder connecting lower fixing seat 7 with the vertically arranged cylinder, and using a lower locking plate 9;
(9) The lower locking piece 9 is designed. After the installation of the fixing seat 7 under the connection of the vertically arranged oil cylinder is completed, the vertically arranged oil cylinder 4 is fixedly connected by penetrating through the upper connecting pin shaft 8 of the vertically arranged oil cylinder, the lower connecting pin shaft 8 of the vertically arranged oil cylinder can be scratched out and fall off in the construction process, and the upper locking plate (component 9) is designed to be embedded into the lower connecting pin shaft 8 of the vertically arranged oil cylinder so that the lower locking plate is not scratched out and fall off.
(10) The prefabricated block 10 is designed. The prefabricated block 10 is poured by using C30 concrete, and is in the form of phi 8@100×100 single-layer steel bars, and the width of the prefabricated block is 0.7 m. When the two lining sections are arranged, the pushing cylinder is forwards stepped under the action of the reaction force provided by the precast blocks, and one precast block is placed every 0.7 meter step by step, and the like, and the operation is continuously performed.
On the other hand, as shown in fig. 13, the invention also provides a space-pushing stepping method based on the bearing wheel device, which comprises the following steps:
(1) When the TBM digs a secondary lining construction section, storing the precast block in a storage area, and adjusting the bearing wheel to a proper position;
(2) Extending the vertically arranged oil cylinder to a proper position, and keeping the bearing wheel at a set position under the action of the hydraulic lock;
(3) The precast block is laid at the bottom to provide a reaction force for forward propulsion, and the propulsion cylinder is propelled forward;
(4) After the idle pushing travel is reached, the pushing oil cylinder is retracted, the precast block is placed in the retraction area, and the idle pushing step is performed again after the precast block is placed firmly until the idle pushing step is completed.
Specifically, in the step (3), the pushing cylinder is pushed forward, and a precast block is placed every 0.7m, and the like, and the steps are continuously performed.
Those of ordinary skill in the art will appreciate that: the foregoing description of the 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 (8)
1. A manufacturing method of a bearing wheel device is characterized in that,
the load bearing wheel apparatus includes: the bearing wheel, the oil cylinder component and the precast block; the oil cylinder assembly comprises an oil cylinder, an upper fixing seat, a lower fixing seat, an upper connecting pin shaft, a lower connecting pin shaft, an upper locking plate and a lower locking plate which are vertically arranged;
the upper end of the vertically arranged oil cylinder is connected with the upper fixing seat through the upper connecting pin shaft; the lower end of the vertically arranged oil cylinder is connected with the lower fixing seat through the lower connecting pin shaft; the upper locking plate is embedded into the upper connecting pin shaft, and the lower locking plate is embedded into the lower connecting pin shaft;
the upper fixing seat is welded with the connecting bridge, and the lower fixing seat is welded with the bearing wheel;
the precast block can be contacted with the propulsion cylinder to provide reverse thrust for the propulsion cylinder;
the manufacturing method comprises the following steps:
(1) Designing an upper fixing seat, welding and fixing the upper fixing seat on a connecting bridge, manufacturing a through hole on the upper fixing seat for connecting a vertically arranged oil cylinder, and manufacturing 2 internal threaded holes on the upper fixing seat for fixing an upper connecting pin shaft;
(2) Designing a connecting pin shaft;
(3) Designing an upper locking plate, wherein the upper locking plate is provided with a through hole matched with an inner threaded hole arranged on the upper fixing seat;
(4) The method comprises the steps of designing a vertically arranged oil cylinder, penetrating an upper connecting pin shaft into a through hole of the upper fixing seat and a through hole at the upper end of the vertically arranged oil cylinder to fixedly connect the vertically arranged oil cylinder after the upper fixing seat is installed, and embedding an upper locking plate into the upper connecting pin shaft;
(5) Designing and processing an outer sheath, wherein one end of the outer sheath is welded with the connecting bridge;
(6) Designing and processing an inner sheath, wherein one end of the inner sheath is welded with the bearing wheel;
(7) The method comprises the steps of designing a lower fixing seat, wherein the lower fixing seat is welded with a bearing wheel, manufacturing a through hole in the lower fixing seat, connecting an oil cylinder arranged vertically, and manufacturing 2 internal threaded holes in the lower fixing seat, wherein the internal threaded holes are used for fixing a lower connecting pin shaft;
(8) Designing a lower connecting pin shaft;
(9) Designing a lower locking plate, wherein the lower locking plate is provided with a through hole matched with an inner threaded hole arranged on a lower fixing seat, after the lower fixing seat is installed, a lower connecting pin shaft penetrates into the through hole of the lower fixing seat and a through hole at the lower end of a vertically arranged oil cylinder to fixedly connect the vertically arranged oil cylinder, and the lower locking plate is embedded into the lower connecting pin shaft;
(10) When the prefabricated block is designed on the two lining sections, the pushing cylinder steps forward under the action of the reaction force provided by the prefabricated block, and one prefabricated block is placed every step by a preset distance, and the like, and the operation is continuously performed.
2. The method for manufacturing a wheel device according to claim 1, further comprising a processing sheath, wherein the processing sheath comprises a processing outer sheath and a processing inner sheath, one end of the processing outer sheath is welded with the connecting bridge, one end of the processing inner sheath is welded with the wheel, the other end of the processing outer sheath is connected with the processing inner sheath, the processing outer sheath is sleeved on the periphery of the processing inner sheath, and the processing outer sheath and the processing inner sheath form relative movement under the action of the oil cylinder assembly.
3. The method of manufacturing a loadwheel apparatus of claim 1 wherein the number of internally threaded holes is 2 and the depth is 10mm.
4. The method of manufacturing a loadwheel apparatus of claim 1 wherein the upper and lower connecting pins are 24mm x 100mm in size.
5. The method of manufacturing a loadwheel apparatus of claim 1 wherein the precast block is cast using C30 concrete and is formed using a single layer of rebar and has a width of 0.7 meters.
6. An air-push stepping method based on a bearing wheel device, characterized in that the bearing wheel device manufactured by the manufacturing method of the bearing wheel device according to any one of claims 1-5 comprises the following steps:
(1) When the TBM digs a secondary lining construction section, storing the precast block in a storage area, and adjusting the bearing wheel to a proper position;
(2) Extending the vertically arranged oil cylinder to a proper position, and keeping the bearing wheel at a set position under the action of the hydraulic lock;
(3) The precast block is laid at the bottom to provide a counter force for forward propulsion, and the propulsion cylinder is propelled forward.
7. The idle pushing stepping method based on the bearing wheel device according to claim 6, further comprising the step of retracting the pushing cylinder after the idle pushing stroke of the step (4) is reached, placing the precast block in the retraction area, and performing idle pushing stepping again after the precast block is placed firmly until the idle pushing stepping is completed.
8. The method of claim 6, wherein the pushing cylinder is pushed forward in step (3), and each time a predetermined distance is pushed, a prefabricated block is placed, and so on, continuously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202111067224.0A CN113756827B (en) | 2021-09-13 | 2021-09-13 | Bearing wheel device and TBM air-pushing stepping method based on bearing wheel device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111067224.0A CN113756827B (en) | 2021-09-13 | 2021-09-13 | Bearing wheel device and TBM air-pushing stepping method based on bearing wheel device |
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| CN113756827A CN113756827A (en) | 2021-12-07 |
| CN113756827B true CN113756827B (en) | 2023-08-11 |
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