CN208778016U - Trolley is widened in tunnel - Google Patents
Trolley is widened in tunnel Download PDFInfo
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- CN208778016U CN208778016U CN201821328918.9U CN201821328918U CN208778016U CN 208778016 U CN208778016 U CN 208778016U CN 201821328918 U CN201821328918 U CN 201821328918U CN 208778016 U CN208778016 U CN 208778016U
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- door frame
- bracket
- template
- trolley
- widened
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Abstract
The utility model provides tunnel and widens trolley, belong to constructing tunnel technical field of tools, including door frame, top template and cheek board, the supporting beam parallel with its top is equipped with above door frame, it is equipped on the right side of door frame and widens bracket, on the left of door frame and widen between bracket right side and cheek board equipped with supporting element one, is equipped with supporting element two between door frame top and top template；Supporting beam is set to door frame and widens the top of bracket, between supporting beam and top template be equipped with column, between supporting beam and door frame be equipped with the first support stringer, supporting beam and widen between bracket be equipped with the second support stringer, widen bracket to be slidably connected with door frame, supporting beam is telescopic structure.Trolley is widened in tunnel provided by the utility model, widen bracket to slide relative to door frame, widen width adjusting according to tunnel and widens bracket stretching door frame length, widen in bore tunnel lining construction, the multiple section lining cutting in tunnel can be completed in trolley on the same stage, lining construction cost is reduced, the construction period is shortened.
Description
Technical field
The utility model belongs to constructing tunnel technical field of tools, is to be related to tunnel to widen trolley more specifically.
Background technique
In constructing tunnel, frequently encounters tunnel local section and need the case where widening.General tunnel trolley can only fit
With the certain constructing tunnel of section, it is not applied for tunnel and widens construction.Such case is encountered, the prior art is taken with interim
Steel arch-shelf spelling, which is set, carrys out trimmed tunnel.After completing widened section tunnel-liner, interim steel arch-shelf scraps processing, material after being removed
Waste is serious；Such as encounter that tunnel width constant interval is larger, for the stability for guaranteeing safety for tunnel engineering and trolley entirety stress,
It needs that trolley is repeatedly transformed, transformation process will cause unrepairable damage to trolley, and time-consuming and laborious, working efficiency is low.
Utility model content
The purpose of this utility model is to provide tunnels to widen trolley, can only be applicable in solving tunnel trolley in the prior art
The certain constructing tunnel of section, is not applied for the technical issues of construction is widened in tunnel.
To achieve the above object, the technical solution adopted in the utility model is, provides tunnel and widens trolley, including door
Frame, top template and cheek board, the door frame top are equipped with the supporting beam parallel with its top, are equipped with and widen on the right side of the door frame
Bracket on the left of the door frame and is widened and is equipped with supporting element one on the right side of bracket between the cheek board, at the top of the door frame and institute
It states and is equipped with supporting element two between top template；The supporting beam is set to the door frame and widens the top of bracket, the supporting beam
It is equipped with column between the top template, the first support stringer, the supporting beam are equipped between the supporting beam and the door frame
The second support stringer is equipped between bracket with described widen, the bracket of widening is slidably connected with the door frame, the supporting beam
For telescopic structure.
Further, the supporting element one includes shoring rod piece and telescopic oil cylinder, described to shore rod piece and the flexible oil
One end of cylinder is connect with the cheek board respectively, the other end for shoring rod piece and the telescopic oil cylinder respectively with the door frame
Left side and described widen on the right side of bracket connect.
Further, the top template includes middle part top template and the left side backform positioned at middle part top template two sides
Plate and right side top template, the middle part backform board ends are hinged with the left side top template and right side top template one end respectively；Institute
Stating supporting element two includes the right side oil cylinder with the left side oil cylinder of left side top template cooperation and with right side top template cooperation,
One end of the left side oil cylinder and the right side oil cylinder is connect at the top of the door frame respectively, the left side oil cylinder and the right side
The other end of oil cylinder is connect with the left side top template and the right side top template respectively.
Further, the cheek board includes left side cheek board and right side cheek board, and the left side template-setup is in institute
State the left side of door frame, the right edge template-setup in the right side for widening bracket, right side cheek board upper end with it is described
Right side top template lower end is hinged, and left side cheek board upper end and left side top template lower end are hinged.
Further, the front-back for widening cradle top is respectively equipped with sliding slot, and the front-back at the top of the door frame is set
There is the sliding block with sliding slot cooperation, the sliding slot widens the setting of cradle top length direction described in, described to widen top of support
It is limited between at the top of portion and the door frame by the first positioning pin, the sliding slot is located at the front-back for widening cradle top
On outer wall, the sliding block is located on the inner wall of the front-back at the top of the door frame.
Further, the front-back for widening cradle top is successively equipped at intervals with several the first adjustment holes, the door
The front-back of top of the trellis is equipped with the first positioning hole cooperated with first adjustment hole, and first positioning pin is located at described first
On location hole, several described first adjustment holes are located at the sliding slot bottom, and the first positioning hole is located at the sliding block side.
Further, the supporting beam outer profile is trapezoidal, and roof side rail, the lower-edge beam of the trapezoidal supporting beam are telescopic
Structure.
Further, the roof side rail is equipped with the second positioning pin that flexible limit is carried out to it, sets on the lower-edge beam
There is the third positioning pin that flexible limit is carried out to it.
Further, the roof side rail includes first sleeve and the first core bar positioned at the first sleeve right end, described
First core bar left end is sheathed in the first sleeve, and first core bar is successively equipped at intervals with from left to right along its length
Several second adjustment holes, the first sleeve right end are equipped with the second location hole that cooperates with second adjustment hole, and described the
Two positioning pins are located in the second location hole.
Further, the lower-edge beam includes the second casing and the second core bar positioned at the second casing right end, described
Second core bar left end is sheathed in second casing, and second core bar is successively equipped at intervals with from left to right along its length
Several third adjustment holes, the second casing right end are equipped with the third location hole that cooperates with the third adjustment hole, and described the
Three positioning pins are located on the third location hole.
The beneficial effect that trolley is widened in tunnel provided by the utility model is: compared with prior art, the utility model
Trolley is widened in the tunnel of offer, widens bracket and slides relative to door frame, widens width adjusting according to tunnel and widens bracket stretching door
Frame length is widened in bore tunnel lining construction, and the multiple section lining cutting in tunnel can be completed in trolley on the same stage, is reduced tunnel-liner and is applied
Work cost shortens the construction period.
Detailed description of the invention
It, below will be to embodiment or the prior art in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing needed in description is briefly described, it should be apparent that, the accompanying drawings in the following description is only that this is practical new
Some embodiments of type for those of ordinary skill in the art without any creative labor, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the schematic diagram that trolley is widened in tunnel provided by the embodiment of the utility model；
Fig. 2 is the enlarged drawing in Fig. 1 at A；
Fig. 3 is the enlarged drawing in Fig. 1 at B；
Wherein, each appended drawing reference in figure:
1, door frame；2, right side cheek board；3, supporting beam；4, the first support stringer；5, column；6, middle part top template；7, left
Side top template；8, right side top template；9, widen bracket；10, rod piece is shored；11, telescopic oil cylinder；12, sliding slot；13, sliding block；14,
Second support stringer；15, the first positioning pin；16, left side oil cylinder；17, right side oil cylinder；18, the first adjustment hole；19, the first positioning
Hole；20, first sleeve；21, the first core bar；22, the second adjustment hole；23, second location hole；24, the second casing；25, the second core
Bar；26, third adjustment hole；27, third location hole；28, the second positioning pin；29, third positioning pin；30, roof side rail；31, following
Beam.
Specific embodiment
In order to which technical problem to be solved in the utility model, technical solution and beneficial effect is more clearly understood, with
Lower combination accompanying drawings and embodiments, the present invention will be further described in detail.It should be appreciated that specific reality described herein
It applies example to be only used to explain the utility model, is not used to limit the utility model.
Also referring to Fig. 1 to Fig. 3, trolley now is widened to tunnel provided by the utility model and is illustrated.The tunnel
Widen trolley, including door frame 1, top template and cheek board, is equipped with the supporting beam 3 parallel with its top, institute above the door frame 1
It states to be equipped on the right side of door frame 1 and widens bracket 9, on the left of the door frame 1 and widen between 9 right side of bracket and the cheek board equipped with support
Part one is equipped with supporting element two between 1 top of door frame and the top template；The supporting beam 3 is set to the door frame 1 and adds
The top of wide bracket 9 is equipped with column 5, between the supporting beam 3 and the door frame 1 between the supporting beam 3 and the top template
Equipped with the first support stringer 4, the supporting beam 3 and described widen are equipped with the second support stringer 14 between bracket 9, described to widen branch
Frame 9 is slidably connected with the door frame 1, and the supporting beam 3 is telescopic structure.
The beneficial effect that trolley is widened in tunnel provided by the utility model is: compared with prior art, the utility model
Trolley is widened in the tunnel of offer, widens bracket and slides relative to door frame, widens width adjusting according to tunnel and widens bracket stretching door
Frame length is widened in bore tunnel lining construction, and the multiple section lining cutting in tunnel can be completed in trolley on the same stage, is reduced tunnel-liner and is applied
Work cost shortens the construction period.Trolley is widened in tunnel provided by the utility model, reasonable in design reliable, by testing
Out, labour only needs the half of original labour, greatly reduces labor intensity, and template appearance and carrying avoid being dismounted for multiple times,
It ensure that construction precision, operating process is time saving and energy saving；There is the trolley structure to be simple and convenient to operate and reduce security risk
Advantage.To widen bracket to be easy to remove from door frame, demolishing process does not cause any structure to destroy in original trolley, meanwhile,
Widen bracket detachably to reuse, improves the turnover utilization rate and transition efficiency of trolley.
Preferably, the supporting element one includes shoring rod piece 10 and telescopic oil cylinder 11, described to shore rod piece 10 and described stretch
One end of contracting oil cylinder 11 is connect with the cheek board respectively, the other end difference for shoring rod piece 10 and the telescopic oil cylinder 11
It is connected with 1 left side of door frame and described widen on the right side of bracket 9.It first passes through after cheek board is installed in place by telescopic oil cylinder 11,
It is fixed by shoring the support of rod piece 10, so that when joints cement, dual fail-safe fixed form is realized in the enhancing of cheek board stability.The
Two support stringers, 14 height is greater than 4 height of the first support stringer.There is height between 1 top beam of 9 top beam of bracket and door frame due to widening
It is poor to spend, and in order to reduce the degree of error of top template and tunnel cooperation, is preferably such that 14 height of the second support stringer is greater than first
4 height of stringer is supportted, to make up above-mentioned difference in height.
Preferably, the top template includes middle part top template 6 and the left side backform positioned at 6 two sides of middle part top template
Plate 7 and right side top template 8,6 both ends of middle part top template are cut with scissors with the left side top template 7 and 8 one end of right side top template respectively
It connects；The supporting element two includes cooperating with the left side oil cylinder 16 of the left side top template 7 cooperation and with the right side top template 8
One end of right side oil cylinder 17, the left side oil cylinder 16 and the right side oil cylinder 17 is connected at the top of the door frame 1 respectively, the left side
The other end of side cylinder 16 and the right side oil cylinder 17 is connect with the left side top template 7 and the right side top template 8 respectively.Top
Template is split type structure, is carried out respectively to left side top template 7 and right side top template 8 by left side oil cylinder 16 and right side oil cylinder 17
It is accurate fixed and positioned, installation accuracy is improved, middle part top template 6 does not have in addition independent setting oil cylinder and carries out installation positioning, only needs
After left side top template 7 and right side top template 8 are installed in place, middle part top template 6 is resisted by column 5, simplifies operation step
Suddenly, cost is saved.
Preferably, the cheek board includes left side cheek board and right side cheek board 2, and the left side template-setup is in described
The left side of door frame 1, the right side cheek board 2 are set to the right side for widening bracket 9,2 upper end of right side cheek board and institute
8 lower end of top template is hinged on the right side of stating, and left side cheek board upper end and 7 lower end of left side top template are hinged.When not needing plus
When wide bracket 9, right side cheek board 2 is then arranged on 1 right side of door frame, rather than first dismantles and reconfigure again, when saving work
Between, improve working efficiency.
Preferably, the front-back for widening 9 top of bracket is respectively equipped with sliding slot 12, the front-back at 1 top of door frame
Equipped with the sliding block 13 cooperated with the sliding slot 12, the sliding slot 12 is arranged along the 9 top length direction of bracket of widening, described to add
Wide 9 top of bracket and the door frame are limited between 1 top by the first positioning pin 15, and the sliding slot 12 widens bracket positioned at described
On the outer wall of the front-back at 9 tops, the sliding block 13 is located on the inner wall of the front-back at 1 top of door frame.Pass through sliding block 13
It is slided in sliding slot 12, is just adjustable and widens the amount that bracket 9 stretches out 1 length of door frame, sliding slot 12 and sliding block 13 are easy to make, connection
Mode is simple.
Preferably, the front-back for widening 9 top of bracket is successively equipped at intervals with several the first adjustment holes 18, the door
The front-back at 1 top of frame is equipped with the first positioning hole 19 cooperated with first adjustment hole 18, and first positioning pin 15 is located at
In the first positioning hole 19, several described first adjustment holes 18 are located at 12 bottom of sliding slot, the first positioning hole 19
Positioned at 13 side of sliding block.Widen position of the bracket 9 relative to door frame 1 by the restriction of the first positioning pin 15, according to tunnel plus
After width, need to widen between 9 length stretched out so that after first positioning hole 19 is aligned with corresponding first adjustment hole 18, by the
One positioning pin 15 sequentially passes through first positioning hole 19 and corresponding first adjustment hole 18.Two neighboring first adjustment hole 18 it
Between position determine that the aperture of the first adjustment hole 18 and first positioning hole 19 is also according to the actual situation according to site specific
Depending on.The first adjustment hole 18 for widening 9 top beam front and rear part of bracket is all correspondingly arranged, and the first of 1 top beam front and rear part of door frame is fixed
Position hole 19 is equally correspondingly arranged, and each first positioning hole 19 is equipped with the first positioning pin 15 and is positioned.
Preferably, 3 outer profile of supporting beam is trapezoidal, and roof side rail 30, the lower-edge beam 31 of the trapezoidal supporting beam 3 are to stretch
Contracting formula structure.The roof side rail of the supporting beam 3 of trapezium structure and the waist beam of two sides is respectively set in multiple columns 5, such as to waist beam
Cut oblique, the corresponding top template contact angle of column 5 thereon is substantially vertical, and top template is bonded with tunnel arc surface
It is closer, improve the precision of construction；3 bearing area of supporting beam of trapezium structure is big, support strength is good, stability is strong.On
It is sequentially arranged at intervals with multiple reinforcing beams between side bar 30 and lower-edge beam 31, further increases the stability of support.
Preferably, the roof side rail 30 is equipped with the second positioning pin 28 that flexible limit is carried out to it, the lower-edge beam 31
It is equipped with the third positioning pin 29 that flexible limit is carried out to it.The roof side rail 30 is including first sleeve 20 and positioned at described first
First core bar 21 of 20 right end of casing, 21 left end of the first core bar are sheathed in the first sleeve 20, first core bar
21 are successively equipped at intervals with several second adjustment holes 22 from left to right along its length, 20 right end of first sleeve be equipped with
The second location hole 23 that second adjustment hole 22 cooperates, second positioning pin 28 are located in the second location hole 23.Institute
Stating lower-edge beam 31 includes the second casing 24 and the second core bar 25 positioned at 24 right end of the second casing, and second core bar 25 is left
End cap is set in second casing 24, and second core bar 25 is successively equipped at intervals with several from left to right along its length
Third adjustment hole 26,24 right end of the second casing is equipped with the third location hole 27 cooperated with the third adjustment hole 26, described
Third positioning pin 29 is located on the third location hole 27.
When the application trolley traveling pass through main hole arrive widened section when, first top stretch on the left of oil cylinder 16 to left side top template 7 in place
Afterwards, the column 5 of installation left side top template 7 lower section, then top stretch right side oil cylinder 17 to right side top template 8 in place after, installation right side
The column 5 of 8 lower section of top template, middle part top template 6 and left side top template 7 and right side top template 8 are hingedly an entirety, left side top
After template 7 and right side top template 8 are installed in place, i.e. middle part top template 6 is also mounted to position, then installs 6 lower section of middle part top template
Column 5；The first positioning pin 15 is taken out, is drawn to the right from the right side of door frame 1 and is widened bracket 9 to suitable position and (widen the prolonging to the right of bracket 9
Elongation and tunnel width increase flux matched) so that after first positioning hole 19 is aligned with corresponding first adjustment hole 18, by first
Positioning pin 15 is sequentially inserted into first positioning hole 19 and corresponding first adjustment hole 18, and bracket 9 is widened in completion and door frame 1 positions work
Make；Roof side rail 30 and 31 length of lower-edge beam are adjusted, it is made to extend right up to suitable position, with the length for widening the stretching door frame 1 of bracket 9
Corresponding, the second support stringer 14 of 8 lower section of installation right side top template is spent, after top integrally checks that geometric dimension is errorless,
Left side cheek board and right side cheek board 2 are installed by telescopic oil cylinder 11 respectively, start widened section construction, realizes that platform is widened in tunnel
The circulation of vehicle is constructed, and overcoming existing trolley and repeatedly encountering tunnel widened section in construction needs being dismounted for multiple times trolley to cause labour strong
Degree is big, cannot be guaranteed quality and the lower problem of construction efficiency.
After widened section has been perfused in construction, first by trolley entire lowering certain altitude, Tunnel wall bottom support pad is abutted, it is right
The jacking of side cylinder 17 right side top template 8 to column 5 loosens, and removes the column 5 of 8 lower section of right side top template, then receives to the left
Contracting supporting beam 3 removes the second support stringer 14；It pushes to the left again and widens bracket 9, keep it close to 1 right side of door frame, that is, be located at tunnel
Within the main hole profile in road, right side oil cylinder 17 is contracted to right side top template 8 close to sagging, and the left side jacking of oil cylinder 16 left side is then used to push up
Template 7 to column 5 loosens, and removes the dismounting column 5 of 7 lower section of left side top template, shrinks left side oil cylinder 16 to left side backform
Plate 7 is contacted with supporting beam 3, that is, is located within the main hole profile in tunnel, is connected top template and door frame with Auxiliary support, is tried traveling inspection
Whether overall structure is retracted to and position firm supporting.It is detachable to widen 9 side of bracket, so next need across main hole, then
It is pushed to the left 9 top of bracket is widened, is located at the lower section at 1 top of door frame, 9 side of bracket is widened in dismounting can carry out normally
Work.
Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention etc. should all wrap
Containing being within the protection scope of the utility model.
Claims (10)
1. trolley is widened in tunnel, which is characterized in that including door frame, top template and cheek board, the door frame top is equipped with and it
The parallel supporting beam in top is equipped on the right side of the door frame and widens bracket, on the left of the door frame and widen on the right side of bracket with the side
It is equipped with supporting element one between template, is equipped with supporting element two between the top template at the top of the door frame；The supporting beam setting
Column, the supporting beam and institute are equipped between the door frame and the top for widening bracket, the supporting beam and the top template
It states and is equipped with the first support stringer between door frame, the supporting beam and described widen are equipped with the second support stringer between bracket, described
Widen bracket to be slidably connected with the door frame, the supporting beam is telescopic structure.
2. trolley is widened in tunnel according to claim 1, which is characterized in that the supporting element one includes shoring rod piece and stretching
Contracting oil cylinder, it is described to shore rod piece and one end of the telescopic oil cylinder is connect with the cheek board respectively, it is described to shore rod piece and institute
The other end for stating telescopic oil cylinder is connect on the left of the door frame and bracket right side of widening respectively.
3. trolley is widened in tunnel according to claim 1, which is characterized in that the top template include middle part top template and
Left side top template and right side top template positioned at middle part top template two sides, the middle part backform board ends respectively with the left side
Side top template and right side top template one end are hinged；The supporting element two include with the left side top template cooperation left side oil cylinder and
With the right side oil cylinder of right side top template cooperation, one end of the left side oil cylinder and the right side oil cylinder respectively with the door frame
Top connection, the other end of the left side oil cylinder and the right side oil cylinder respectively with the left side top template and the right side backform
Plate connection.
4. trolley is widened in tunnel according to claim 3, which is characterized in that the cheek board includes left side cheek board and the right side
Side template, the left side template-setup widen bracket in described in the left side of the door frame, the right edge template-setup
Right side, right side cheek board upper end and right side top template lower end are hinged, left side cheek board upper end and the left side
Side top template lower end is hinged.
5. trolley is widened in tunnel according to claim 1, which is characterized in that the front-back difference for widening cradle top
Equipped with sliding slot, the front-back at the top of the door frame is equipped with the sliding block cooperated with the sliding slot, and the sliding slot widens bracket described in
The setting of top length direction, described widen between at the top of cradle top and the door frame are limited by the first positioning pin, the cunning
For slot position on the outer wall of the front-back for widening cradle top, the sliding block is located at the inner wall of the front-back at the top of the door frame
On.
6. trolley is widened in tunnel according to claim 5, which is characterized in that the front-back for widening cradle top is successively
Several the first adjustment holes are equipped at intervals with, the front-back at the top of the door frame, which is equipped with first cooperated with first adjustment hole, to be determined
Position hole, first positioning pin are located in the first positioning hole, several described first adjustment holes are located at the sliding slot bottom,
The first positioning hole is located at the sliding block side.
7. trolley is widened in tunnel according to claim 1, which is characterized in that the supporting beam outer profile be it is trapezoidal, it is trapezoidal
Roof side rail, the lower-edge beam of the supporting beam are telescopic structure.
8. trolley is widened in tunnel according to claim 7, which is characterized in that the roof side rail, which is equipped with, stretches to it
Second positioning pin of limit, the lower-edge beam are equipped with the third positioning pin that flexible limit is carried out to it.
9. trolley is widened in tunnel according to claim 8, which is characterized in that the roof side rail includes first sleeve and is located at
First core bar of the first sleeve right end, first core bar left end are sheathed in the first sleeve, first core bar
Successively it is equipped at intervals with several second adjustment holes from left to right along its length, the first sleeve right end is equipped with and described the
The second location hole of two adjustment holes cooperation, second positioning pin are located in the second location hole.
10. trolley is widened in tunnel according to claim 8, which is characterized in that the lower-edge beam includes the second casing and position
In the second core bar of the second casing right end, second core bar left end is sheathed in second casing, second core
Bar is successively equipped at intervals with several third adjustment holes from left to right along its length, the second casing right end be equipped with it is described
The third location hole of third adjustment hole cooperation, the third positioning pin are located on the third location hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821328918.9U CN208778016U (en) | 2018-08-17 | 2018-08-17 | Trolley is widened in tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821328918.9U CN208778016U (en) | 2018-08-17 | 2018-08-17 | Trolley is widened in tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208778016U true CN208778016U (en) | 2019-04-23 |
Family
ID=66157202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821328918.9U Active CN208778016U (en) | 2018-08-17 | 2018-08-17 | Trolley is widened in tunnel |
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| Country | Link |
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| CN (1) | CN208778016U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110513126A (en) * | 2019-09-27 | 2019-11-29 | 中铁四局集团有限公司 | A kind of tunnel double-lining trolley that section-variable can be recycled |
| CN112647967A (en) * | 2020-12-26 | 2021-04-13 | 中铁十局集团有限公司 | Combined and separated type multipurpose excavation trolley for large-section tunnel and construction method thereof |
| CN115478517A (en) * | 2022-09-19 | 2022-12-16 | 河南黄河河务局工程建设中心 | Support protection device for hydraulic engineering construction and use method thereof |
-
2018
- 2018-08-17 CN CN201821328918.9U patent/CN208778016U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110513126A (en) * | 2019-09-27 | 2019-11-29 | 中铁四局集团有限公司 | A kind of tunnel double-lining trolley that section-variable can be recycled |
| CN110513126B (en) * | 2019-09-27 | 2020-11-13 | 中铁四局集团有限公司 | Recyclable tunnel secondary lining trolley with variable cross section |
| CN112647967A (en) * | 2020-12-26 | 2021-04-13 | 中铁十局集团有限公司 | Combined and separated type multipurpose excavation trolley for large-section tunnel and construction method thereof |
| CN112647967B (en) * | 2020-12-26 | 2022-06-28 | 中铁十局集团有限公司 | Combined and separated type multipurpose excavation trolley for large-section tunnel and construction method thereof |
| CN115478517A (en) * | 2022-09-19 | 2022-12-16 | 河南黄河河务局工程建设中心 | Support protection device for hydraulic engineering construction and use method thereof |
| CN115478517B (en) * | 2022-09-19 | 2024-01-26 | 河南黄河河务局工程建设中心 | Support protection device for hydraulic engineering construction and application method thereof |
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