CN106522997A - Construction trolley for lagging jack in tunnel and underground construction and construction method - Google Patents
Construction trolley for lagging jack in tunnel and underground construction and construction method Download PDFInfo
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- CN106522997A CN106522997A CN201611053328.5A CN201611053328A CN106522997A CN 106522997 A CN106522997 A CN 106522997A CN 201611053328 A CN201611053328 A CN 201611053328A CN 106522997 A CN106522997 A CN 106522997A
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- 238000010276 construction Methods 0.000 title claims abstract description 54
- 230000009194 climbing Effects 0.000 claims description 19
- 238000009434 installation Methods 0.000 claims description 5
- 210000005056 cell body Anatomy 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 2
- 230000000903 blocking effect Effects 0.000 abstract 3
- 229910000831 Steel Inorganic materials 0.000 description 9
- 239000010959 steel Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 239000011435 rock Substances 0.000 description 5
- 239000011229 interlayer Substances 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000006378 damage Effects 0.000 description 3
- 230000005484 gravity Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009440 infrastructure construction Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
- E21D11/14—Lining predominantly with metal
- E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/107—Reinforcing elements therefor; Holders for the reinforcing elements
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
- E21D11/40—Devices or apparatus specially adapted for handling or placing units of linings or supporting units for tunnels or galleries
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a construction trolley for a lagging jack in tunnel and underground construction and a construction method. The construction trolley comprises a bottom support structure, a middle support structure and a top jacking structure, wherein the top jacking structure comprises a base, a lifting structure and a third support platform; the base is arranged on a horizontal guiding structure; the lifting structure is arranged on the base; the third support platform is fixed on the lifting structure; a clamping and fixing structure is arranged on the upper surface of the third support platform; the clamping and fixing structure comprises a blocking slot; the slot body width of the blocking slot is corresponding to the width of a to-be-jacked lagging jack, so that the blocking slot is in interference fit with the to-be-jacked lagging jack; and the widths of the first, second and third support platforms are gradually reduced, so that the two opposite edges of the first, second and third support platforms are all in contact with the to-be-jacked lagging jack after the to-be-jacked lagging jack is fully fixed on the construction trolley, and an acting force for fixing the lagging jack is generated.
Description
Technical field
The present invention relates to the construction trolley and construction method of a kind of tunnels and underground engineering middle arch rack.
Technical background
As developing rapidly for national economy, the investment of infrastructure construction increase, the Tunnel Engineering such as traffic, water conservancy is more next
It is more.It is just using bow member support forms such as shaped steel arch, grid steel frame, concrete steel pipes more than a structure, in constructing at present to adopt more
With the installation for manually carrying out a just structure, huge manpower consumption and personnel's injury are caused.
Although had in prior art to carry out propping up to support forms such as shaped steel arch, grid steel frame and concrete steel pipes
The construction trolley of shield, but the small volume of dolly, during on the structure hoistings such as bow member to construction trolley, only jacking position, such as
The top of hydraulic jack is contacted with bow member, so can cause that bow member is isostructural to be rocked, is on the one hand unfavorable for adjusting the knot such as bow member
The jacking precision of structure, in order to reach during expected jacking installation accuracy, it is necessary to adjust the position of bow member, when not only consuming
Between, work efficiency is reduced, substantial amounts of manpower and materials are also consumed, during another aspect bow member rocks, easily to the people that works
Member damages or property is caused damage；The third aspect, when bow member rocks, needs to make which quiet bow member applying active force
Only, and during the jacking of bow member need to buttress bow member, prevent which from rocking, labor intensive material resources.
The content of the invention
For technical problem present in above-mentioned prior art, it is an object of the present invention to provide a kind of tunnel and underground
The construction trolley of engineering middle arch rack, after bow member is lifted in construction trolley, can be quick static in the presence of construction trolley,
And bow member fixed structure in construction trolley, is provided with, bow member is fixed during bow member jacking, prevents rocking for bow member,
The precision and jacking efficiency of bow member jacking are improve, and eliminates potential safety hazard.
It is a further object to provide a kind of construction method of the construction trolley of tunnels and underground engineering middle arch rack.
In order to solve above technical problem, the technical scheme is that：
A kind of construction trolley of tunnels and underground engineering middle arch rack, including base support structure, middle level supporting construction and on
Layer climbing structure, wherein,
Base support structure includes the first supporting table, and middle level supporting construction is fixed on the upper surface of the first supporting table；
Middle level supporting construction includes the second supporting table, and the upper surface of the second supporting table is provided with horizontally-guided structure, described
Upper strata climbing structure is arranged in horizontally-guided structure, and is connected with power source；
The upper strata climbing structure includes base, lifting structure and the 3rd supporting table, and floor installation is in the horizontally-guided
In structure, lifting structure is arranged on the base, and the 3rd supporting table is fixed on lifting structure；The upper surface of the 3rd supporting table
Engaging fixing structure is provided with, engaging fixing structure includes draw-in groove, and the cell body width of draw-in groove is corresponding with the width for treating jacking bow member
Arrange, make draw-in groove and treat jacking bow member interference fit；
The width of the first supporting table, the second supporting table and the 3rd supporting table is sequentially reduced so that will treat that jacking bow member is being applied
After on work chassis, fixation is finished, relative two edge of the first supporting table, the second supporting table and the 3rd supporting table with wait to push up
Bow member contact is risen, and is produced for fixing the active force of bow member.
Preferably, first supporting table and the coaxial installation of the second supporting table.
Preferably, the upper surface of first supporting table and the second supporting table is plane.
Preferably, relative two edge of first supporting table is provided with multigroup first groove, and per group first recessed
The line of groove and the horizontally-guided structure vertical.
Preferably, relative two edge of second supporting table is provided with multigroup second groove, and per group second recessed
The line of groove and the horizontally-guided structure vertical.
It is further preferred that multigroup second groove pair on multigroup first groove and the second supporting table in the first supporting table
Should arrange.
Preferably, the horizontally-guided structure is two guide rails be arrangeding in parallel.
It is further preferred that the guide rail is shaped as semi-cylindrical, the lower surface of the base is provided with is led with described
The semi-cylindrical recesses that rail coordinates.
Preferably, the engaging fixing structure includes the first draw-in groove and the second draw-in groove, the first draw-in groove and the second draw-in groove difference
Relative two edge of the upper surface of the 3rd supporting table is fixed on, and the first draw-in groove and the second draw-in groove are tied with horizontally-guided
Structure is vertical.
It is further preferred that first draw-in groove and the second draw-in groove are constituted by relatively-stationary two boards shape structure.
Preferably, the lifting structure includes four hydraulic props, and four hydraulic props are separately mounted to
At four angles of the lower surface of three supporting tables, hydraulic prop oil pump is arranged on the base.
Preferably, supporting leg is provided with four angles of the lower surface of first supporting table, wheel is installed below supporting leg
Son.
A kind of construction method of the construction trolley of tunnels and underground engineering middle arch rack, comprises the steps：
1) construction trolley is transported to and is treated at supporting position, upper strata climbing structure is moved to the lower section for treating supporting position；
2) will treat that jacking bow member is lifted, and make the both sides haunch for treating jacking bow member be stuck in one group first of the first supporting table
In groove or in one group of second groove of/the second supporting table；
3) will treat that jacking bow member is moved down so as to which top is fastened in the draw-in groove of the engaging fixing structure, it is fixed；
4) start lifting structure, by bow member steady jacking, bow member rises along the first groove or/and the second groove, until setting
Fixed height.
Beneficial effects of the present invention are：
1st, engaging fixing structure of the invention can be used for being fixed the top of bow member, the first supporting table and/or second
The groove of two relative edges of supporting table plays engaging restriction effect to the haunch of bow member, engaging fixing structure and first
Support platform and/or the second supporting table coordinate, after bow member is lifted on operation platform, static rapidly to get off, during jacking
Rocking for bow member can also be avoided, bow member is on the one hand avoided and is rocked the potential safety hazard brought, on the other hand can ensure that bow member
The precision of jacking, reduces drain on manpower and material resources.
2nd, horizontally-guided structure can adjust the position of upper strata climbing structure, while improving jacking precision, apply also for
The support work of various location.
3rd, the oil pump of hydraulic prop is arranged in the base of upper strata climbing structure, simplifies the structure of operation platform,
And the carrying out of more convenient jacking work.
Description of the drawings
Fig. 1 is the overall structure diagram of the present invention；
Fig. 2 is the structural representation of the upper strata climbing structure of the present invention；
Wherein, 1, bow member；2nd, the second supporting table；3rd, horizontally-guided structure；4th, interlayer pillar；5th, hydraulic prop oil
Pump；6th, base；7th, hydraulic prop；8th, the 3rd supporting table；9th, engaging fixing structure.
Specific embodiment
The present invention will be further described with example below in conjunction with the accompanying drawings：
As illustrated, a kind of construction trolley of tunnels and underground engineering middle arch rack, including base support structure, middle level support
Structure and upper strata climbing structure, wherein,
Base support structure refers to undermost supporting construction, and its effect is as follows：
First, operation platform is that, for supporting construction such as jacking bow members, bow member is usually shaped steel arch, or concrete steel pipe
Bow member, with larger weight, in order to ensure steady, the safety of jacking process, needs operation platform to have higher intensity
With relatively low position of centre of gravity, so propose to the base support structure compared with strict requirements, base support structure should with compared with
Big volume, heavier weight and higher intensity, play a part of bottom support.So, base support structure includes
One supporting table, the concrete structure and form of first supporting table do not have strict restriction, and such as the first supporting table inherently plays class
Like the effect of base, the heavier-weight of the first supporting table, the center of gravity of construction trolley can be made integrally to move down.As another kind of enforcement
Mode, base support structure is except including in addition to the first supporting table, it is also possible to be included in playing of arranging below the first supporting table
The pillar of supporting role, pillar are supported at the angle of the first supporting table, it is ensured that the stability of the first supporting table, e.g., add first
Supporting table for cuboid, then pillar is supported at four angles of the first supporting table lower surface, and this is also well known support
Method.Certainly, as the height of the underground engineerings such as tunnel is higher, so under conditions of stability is ensured, can properly increase
The height of pillar, this highly can be obtained through test of many times.
Second, base support structure can be played to bow member and frictionally secure or arrange groove, play a part of to be fixed.
During bow member jacking, the first step should bow member be lifted to the lifting structure of operation platform, then by operation platform
Carry out jacking work.General lifting structure is simply played a supporting role to bow member, or in order to prevent dropping for bow member, in lifting
Baffle plate is provided with structure.But often have ignored a bit, bow member is lifted to the lifting of operation platform by outside active force to be tied
During structure, bow member is susceptible to rock, and on the one hand rock can make vault deviate lifting structure, then the essence for during jacking, reducing jacking
Degree, needs again labor intensive material resources to be adjusted the position of bow member；On the other hand, the quality of bow member is larger, and inertia is big, rocks
When the destructive power that produces it is larger, potential safety hazard can be produced to neighbouring people and thing.
So, the width of the first support base can be increased so as to the width of corresponding position after fixing slightly larger than bow member, be made
There is frictional force between first support base and bow member, and then bow member is quickly fixed.It should be noted that the first support base and bow member
Between frictional force can not be too big, it is too big to be difficult to carry out manual control, so, the width and height and bow member of the first support base
Corresponding relation can be determined by correlation test.
As another preferred embodiment, can arrange multigroup recessed in relative two edge of the first support base
Groove, the both sides haunch of bow member is positioned in groove, line and the horizontally-guided structure vertical of each group of groove, the width of groove
It is correspondingly arranged with the width of bow member, herein, the width of groove should be slightly larger than the width of bow member, to prevent in jacking process further groove
Larger resistance is produced to bow member.During jacking, groove plays restriction effect to the position of bow member, it is therefore prevented that bow member shakes
Shake.
Middle level supporting construction is fixed on the upper surface of the first supporting table, plays a part of middle transition, the jacking to bow member
Play more preferable assosting effect.Medial support structures can include one layer of supporting table, it is also possible to including Multi-layer supporting platform, depending on concrete
Construction environment depending on.In order to simplify the structure of operation platform, it is one layer by middle level support structure configuration, including the second supporting table
2, between the second supporting table 2 and the first supporting table can with directly contact, in that case, in order to reach the height of jacking,
Two supporting tables 2 should have larger thickness, can cause the waste of raw material, so, under conditions of proof strength and stability, will
Second supporting table 2 is designed to certain thickness, is entered by arranging interlayer pillar 4 between the second supporting table 2 and the first supporting table
Row is supported to be fixed, and the height of interlayer pillar 4 can be adjusted according to actual construction environment, so, can be by interlayer pillar 4
Collapsible structure is designed to, with the more preferable suitability.
In order to ensure the synergism of middle level supporting construction and base support structure, by the width design of the second supporting table 2
It is that, less than the width of the first supporting table, and both are coaxially disposed.After bow member lifting, the width on top is less than the width of bottom
The width of degree, the first supporting table and the second supporting table 2 is adapted with the width of bow member, certain rubbing can be played to bow member simultaneously
Power is wiped, quickly bow member is fixed.
Multigroup groove can also be set in relative two edge of the second supporting table 2 only, the line of every group of groove with
Horizontally-guided structure vertical.That is, the second supporting table 2 can also play spacing effect during bow member jacking to bow member, keep away
Rocking for bow member is exempted from.
Equally, groove can be set in the edge of the first supporting table and the second supporting table 2 simultaneously, principle here is no longer gone to live in the household of one's in-laws on getting married
State.
The upper surface of the second supporting table 2 is provided with horizontally-guided structure 3, and the upper strata climbing structure is movably arranged on level
On guide frame 3, and it is connected with power source.When supporting is carried out to tunnel, need multiple bow members are mounted side by side, if movement is applied
Work platform, is then aligned again, it is not easy to carried out.Upper strata climbing structure is movably arranged in horizontally-guided structure 3, makes upper strata
Climbing structure can be fed in the horizontal direction along horizontally-guided structure 3, when the complete bow member of jacking supporting, only can be adjusted
Upper strata climbing structure so as to after tunnel direction movement setpoint distance, fixed, then supporting next one bow member, this kind of mode compared with
Simplicity, easily realizes, improves work efficiency.
Horizontally-guided structure 3 can be single guide rail, or two guide rails be arrangeding in parallel, as long as upper strata can be made
Climbing structure is moved horizontally along orientation.The shape of horizontally-guided structure 3 is not intended to be limited in any, and e.g., can be cylinder, semicircle
Post and other cylinders, install for convenience and process, preferably semicylinder.
As shown in Fig. 2 the upper strata climbing structure includes base 6, lifting structure and the 3rd supporting table 8, the bottom of base 6
Arrange fluted, and base 6 is arranged in the horizontally-guided structure 3 by groove, lifting structure is arranged on the base 6
On, the 3rd supporting table 8 is fixed on lifting structure；The upper surface of the 3rd supporting table 8 is provided with engaging fixing structure 9, and engaging is solid
Fixed structure 9 includes draw-in groove, and cell body width and the width for treating jacking bow member of draw-in groove are correspondingly arranged, and make draw-in groove and treat jacking bow member 1
Interference fit.The effect of draw-in groove is the bow member 1 that is fixed, and prevents which from shaking during jacking, thus need draw-in groove with
1 interference fit of bow member.
As one kind preferred embodiment, the engaging fixing structure 9 includes the first draw-in groove and the second draw-in groove, the first card
Groove and the second draw-in groove are separately fixed at relative two edge of the upper surface of the 3rd supporting table, and the first draw-in groove and the second card
Groove is vertical with horizontally-guided structure 3.First draw-in groove and the second draw-in groove are constituted by relatively-stationary two boards shape structure,
The distance between two boards shape structure is slightly smaller than the shaped steel width of bow member.
The lifting structure includes four hydraulic props 7, and four hydraulic props 7 are separately mounted to the 3rd support
At four angles of the lower surface of platform 8, hydraulic prop oil pump 5 is arranged on the base 6.
Supporting leg is provided with four angles of the lower surface of first supporting table, wheel is installed below supporting leg, is easy to
The movement of construction trolley.
A kind of construction method of the construction trolley of tunnels and underground engineering middle arch rack, comprises the steps：
1) construction trolley is transported to and is treated at supporting position, upper strata climbing structure is moved to the lower section for treating supporting position；
2) will treat that jacking bow member 1 is lifted, and make the both sides haunch for treating jacking bow member 1 be stuck in one group of the first supporting table
In one groove or in one group of second groove of/the second supporting table；
3) will treat that jacking bow member 1 is moved down so as to which top is fastened in the draw-in groove of the engaging fixing structure 9, it is fixed；
4) start lifting structure, 1 steady jacking of bow member, bow member 1 are risen along the first groove or/and the second groove, until
Setting height.
Although the above-mentioned accompanying drawing that combines is described to the specific embodiment of the present invention, not to invention protection domain
Restriction, one of ordinary skill in the art should be understood that on the basis of technical scheme those skilled in the art are not required to
The various modifications or deformation made by creative work is paid are still within the scope of the present invention.
Claims (10)
1. a kind of construction trolley of tunnels and underground engineering middle arch rack, it is characterised in that：Support including base support structure, middle level
Structure and upper strata climbing structure, wherein,
Base support structure includes the first supporting table, and middle level supporting construction is fixed on the upper surface of the first supporting table；
Middle level supporting construction includes the second supporting table, and the upper surface of the second supporting table is provided with horizontally-guided structure, the upper strata
Climbing structure is arranged in horizontally-guided structure, and is connected with power source；
The upper strata climbing structure includes base, lifting structure and the 3rd supporting table, and floor installation is in the horizontally-guided structure
On, lifting structure is arranged on the base, and the 3rd supporting table is fixed on lifting structure；The upper surface of the 3rd supporting table is arranged
There is engaging fixing structure, engaging fixing structure includes draw-in groove, and cell body width and the width for treating jacking bow member of draw-in groove are correspondingly arranged,
Make draw-in groove and treat jacking bow member interference fit；
The width of the first supporting table, the second supporting table and the 3rd supporting table is sequentially reduced so that jacking bow member will be treated in construction platform
After on car, fixation is finished, relative two edge of the first supporting table, the second supporting table and the 3rd supporting table with treat jacking and encircle
Bridge joint is touched, and is produced for fixing the active force of bow member.
2. construction trolley according to claim 1, it is characterised in that：First supporting table and the coaxial peace of the second supporting table
Dress.
3. construction trolley according to claim 1, it is characterised in that：The upper table of first supporting table and the second supporting table
Face is plane.
4. construction trolley according to claim 1, it is characterised in that：Relative two edge of first supporting table
It is provided with multigroup first groove, the line of per group of first groove and the horizontally-guided structure vertical.
5. the construction trolley according to claim 1 or 4, it is characterised in that：Relative two side of second supporting table
Multigroup second groove, the line of per group of second groove and the horizontally-guided structure vertical are provided with edge.
6. construction trolley according to claim 5, it is characterised in that：Multigroup first groove and second in first supporting table
Multigroup second groove in supporting table is correspondingly arranged.
7. construction trolley according to claim 1, it is characterised in that：The horizontally-guided structure is two for be arrangeding in parallel
Guide rail；
It is further preferred that the guide rail is shaped as semi-cylindrical, the lower surface of the base is provided with is matched somebody with somebody with the guide rail
The semi-cylindrical recesses of conjunction.
8. construction trolley according to claim 1, it is characterised in that：The engaging fixing structure includes the first draw-in groove and
Two draw-in groove, the first draw-in groove and the second draw-in groove are separately fixed at relative two edge of the upper surface of the 3rd supporting table, and
One draw-in groove and the second draw-in groove with horizontally-guided structure vertical.
9. construction trolley according to claim 8, it is characterised in that：First draw-in groove and the second draw-in groove are by relatively solid
Fixed two boards shape structure is constituted.
10. a kind of construction method of the construction trolley of tunnels and underground engineering middle arch rack, it is characterised in that：Comprise the steps：
1) construction trolley is transported to and is treated at supporting position, upper strata climbing structure is moved to the lower section for treating supporting position；
2) will treat that jacking bow member is lifted, and make the both sides haunch for treating jacking bow member be stuck in one group of first groove of the first supporting table
In or one group of second groove of/the second supporting table in；
3) will treat that jacking bow member is moved down so as to which top is fastened in the draw-in groove of the engaging fixing structure, it is fixed；
4) start lifting structure, by bow member steady jacking, bow member rises along the first groove or/and the second groove, until setting is high
Degree.
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| CN201611053328.5A CN106522997B (en) | 2016-11-24 | 2016-11-24 | A kind of construction trolley and construction method of tunnels and underground engineering middle arch rack |
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| CN201611053328.5A CN106522997B (en) | 2016-11-24 | 2016-11-24 | A kind of construction trolley and construction method of tunnels and underground engineering middle arch rack |
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Cited By (9)
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| CN107152289A (en) * | 2017-07-25 | 2017-09-12 | 重庆交通大学 | The vcehicular tunnel maintenance and reinforcement platform and device of low influence traffic |
| CN107191195A (en) * | 2017-07-25 | 2017-09-22 | 重庆交通大学 | The vcehicular tunnel maintenance and reinforcement platform and device of uninterrupted traffic |
| CN108167003A (en) * | 2018-01-31 | 2018-06-15 | 湖南五新隧道智能装备股份有限公司 | A kind of tunnel arch Mobile workbench |
| CN109026077A (en) * | 2018-09-27 | 2018-12-18 | 长沙科达智能装备股份有限公司 | Clamping device for multiple arch supporting trolley |
| CN110486020A (en) * | 2019-08-06 | 2019-11-22 | 中国铁建重工集团股份有限公司 | Tunneling operation vehicle |
| CN112302686A (en) * | 2020-10-30 | 2021-02-02 | 中交隧道工程局有限公司 | Vertical jacking construction method for entering tunnel inclined shaft into main tunnel |
| CN112554912A (en) * | 2020-12-11 | 2021-03-26 | 天长市飞龙金属制品有限公司 | Steel grating combined support for tunnel initial construction support |
| CN113074004A (en) * | 2021-04-19 | 2021-07-06 | 中铁工程装备集团有限公司 | Novel operation rack for tunnel construction and use method thereof |
| CN113074001A (en) * | 2021-04-19 | 2021-07-06 | 中铁工程装备集团有限公司 | Multifunctional operation rack suitable for tunnel construction |
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