CN107725065A - A kind of prefabricated box culvert and its distribution method - Google Patents
A kind of prefabricated box culvert and its distribution method Download PDFInfo
- Publication number
- CN107725065A CN107725065A CN201710916730.XA CN201710916730A CN107725065A CN 107725065 A CN107725065 A CN 107725065A CN 201710916730 A CN201710916730 A CN 201710916730A CN 107725065 A CN107725065 A CN 107725065A
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- box culvert
- prefabricated box
- support bar
- sleeve
- wall
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000010276 construction Methods 0.000 claims abstract description 18
- 238000005259 measurement Methods 0.000 claims description 4
- 230000008859 change Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 230000005226 mechanical processes and functions Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 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
- E21D11/04—Lining with building materials
- E21D11/08—Lining with building materials with preformed concrete slabs
-
- 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
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F16/00—Drainage
- E21F16/02—Drainage of tunnels
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Civil Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
- Sewage (AREA)
Abstract
A kind of prefabricated box culvert and its distribution method provided by the invention, including：The support bar of vertical height can be adjusted and by the they sup-port in the prefabricated box culvert casing of shield tunnel segment lining bottom；Hollow sleeve is embedded with inside the wall of the prefabricated box culvert lower box, the sleeve is vertically set, and the opening of the sleeve lower end is concordant with the bottom end face of the wall, and the top of the support bar is plugged in the sleeve；Its distribution method enters the depth of sleeve inner according to the accumulated error adjustment support bar grafting of construction conduction, so as to adjust the height and position of prefabricated box culvert casing.Shield tunnel segment lining bottom is directly seated compared to prefabricated box culvert casing in the prior art and can not adjust height, the prefabricated box culvert and its distribution method of the present invention, it can effectively adjust the height and position of prefabricated box culvert casing, eliminate or reduce due to the accumulated error of construction conduction, so as to reduce tunnel internal diameter.
Description
Technical field
The present invention relates to tunnel structure, more particularly, to a kind of prefabricated box culvert and its distribution method.
Background technology
To accelerate the construction speed of large shield tunnel internal structure, and easily material is provided for front shield driving face
Transport channel, the internal structure in large shield tunnel select prefabricated box culvert scheme more.Prefabricated box culvert top surface to section of jurisdiction bottom phase
It is a fixed value to height.
At present, it is with regard to installing prefabricated box culvert or making its more firm method mostly in the work progress of installation prefabricated box culvert
Or the improvement of equipment, not to the regulation of prefabricated box culvert height.Such as Publication No. CN206000538U Chinese patent application,
It discloses a kind of shield machine trailing type trestle device, including prefabricated box culvert and trestle car, the left and right sides of prefabricated box culvert are symmetrical
Provided with trestle car, trestle car includes the frame structure shored, support and diagonal brace form vertically.Vertical support is provided with roller, uses
In the side for being supported on prefabricated box culvert, diagonal brace is provided with roller, for being supported on the tube wall in tunnel, shores upper berth equipped with lid
Plate, the top surface of the cover plate and the top surface of prefabricated box culvert are in same level；Prefabricated box culvert is axial split-type structural；Per side of the stack
Bridge car has several, is connected with each other, and can be pulled by shield machine above.
The program makes the installation process of prefabricated box culvert easier, and still, prefabricated box culvert is directly to be seated on pipe-plate lining,
Directly the height of the installation site of prefabricated box culvert can not be adjusted.And prefabricated box culvert is directly seated on pipe-plate lining, shield
The misalignment of axe and the faulting of slab ends of pipe sheet assembling, the stress deformation of section of jurisdiction bottom of structure driving can be directly conducted to prefabricated box culvert top
Face, so as to cause box culvert top surface and design distance diminution or the increase between road surface/rail level.
The content of the invention
The present invention provides a kind of prefabricated box culvert and its cloth for overcoming above mentioned problem or solving the above problems at least in part
Equipment, method, to solve between the top surface and road surface/rail level structure sheaf of prefabricated box culvert to exist due to applying during shield tunnel construction
The technical problem of the accumulated error of work conduction.
According to an aspect of the present invention, there is provided a kind of prefabricated box culvert, including：Can adjust vertical height support bar and
By the they sup-port in the prefabricated box culvert casing of shield tunnel segment lining bottom；The wall of the prefabricated box culvert lower box
Internal portion is embedded with hollow sleeve, and the sleeve is vertically set, and the opening of the sleeve lower end and the wall
Bottom end face it is concordant, the top of the support bar is plugged in the sleeve.
Further, the inwall of the sleeve is milled with internal thread, and the outer wall of the support bar is milled with and the internal thread phase
The external screw thread of cooperation.
Further, it is provided through the logical of the support bar along the radial direction of the support bar on the support bar
Hole, the through hole at least two；Below the wall and press close in the through hole of the wall to be plugged with horizontal support
Bar, the upper surface of the horizontal support bar are adjacent to the wall bottom.
Further, the support bar has multiple, and is symmetrically vertically plugged in the wall of the prefabricated box culvert casing two-by-two
Internal portion.
Further, the ratio between the thickness of the diameter of the support bar and the wall is 0.1~0.2.
Further, the bottom of the support bar is connected with base, and the cross-sectional area of the base is more than the support
The cross-sectional area of bar.
Further, it is provided with rubber sheet gasket on the downside of the base.
According to another aspect of the present invention, a kind of distribution method of prefabricated box culvert is also provided, including：
Step S1, while prefabricated box culvert casing is made, sleeve is vertically embedded to the precast box culvert box
In the wall of body bottom；
Step S2, the construction accumulated error of the prefabricated box culvert casing assembly position obtained according to measurement, adjustment support bar are inserted
Access the depth of the sleeve inner and fixation；
Step S3, one end sequentially firm banking and rubber blanket away from the prefabricated box culvert casing on the support bar
Piece；
Step S4, by prefabricated box culvert assembly to specified location, with reference to applying for shield tunnel segment lining internal structure,
The bottom of prefabricated box culvert casing pours space of the slightly expanded concrete between sold stowing sleeve and prefabricated box culvert casing.
Beneficial effects of the present invention are mainly as follows：
(1) sleeve is embedded inside the wall of prefabricated box culvert lower box, and sets be plugged in the sleeve accordingly
Support bar stretches into the depth of prefabricated box culvert box house by adjusting support bar to support prefabricated box culvert casing, pre- so as to adjust
The spacing of box culvert box top processed and road surface/rail level, to eliminate or reduce the accumulated error of shield tunnel construction conduction；
(2) support bar uses the helicitic texture being engaged with sleeve and/or the through-hole structure being disposed radially, can be effective
The degree of regulation for improving prefabricated box culvert box height position.
Brief description of the drawings
Fig. 1 is according to a kind of structural representation of prefabricated box culvert in the embodiment of the present invention.
Embodiment
With reference to the accompanying drawings and examples, the embodiment of the present invention is described in further detail.Implement below
Example is used to illustrate the present invention, but is not limited to the scope of the present invention.
Shown in Figure 1, a kind of prefabricated box culvert, it includes prefabricated box culvert casing 4 and support bar 2, and support bar 2 is arranged on pre-
The downside of box culvert casing 4 processed.The lower support of support bar 2 is in the bottom in shield tunnel segment lining, upper support precast box
Culvert box body 4.Meanwhile support bar 2 can be used in adjusting vertical height, to change the height and position of prefabricated box culvert casing 4, realize pre-
The lifting or reduction of the position of box culvert casing 4 processed, so as to regulate and control the top surface of prefabricated box culvert casing 4 and design road surface/rail level between away from
From the accumulated error of reduction shield tunnel construction conduction.And then tunnel internal diameter can be optimized, reduce difficulty of construction.
Hollow sleeve 1 is embedded with inside the wall of the bottom of prefabricated box culvert casing 4, sleeve 1 is vertically set.Set
Cylinder 1 can be that only lower ending opening or upper/lower terminal is open, and the opening of the lower end of sleeve 1 and prefabricated box culvert casing 4
Wall bottom end face it is concordant.That is sleeve 1 is vertically extended to the bottom of wall by the inside of wall, and with it is outer
Boundary communicates.
The top of support bar 2 is plugged in inside sleeve 1 by the opening of the lower end of sleeve 1.Comprehensive shield tunnel construction tires out
Product error size, the depth inside the insertion sleeve 1 of support bar 2 is adjusted, and then adjust support bar 2 and be located under prefabricated box culvert casing 4
The length in portion, so as to play a part of regulating and controlling the height and position of prefabricated box culvert casing 4.In actual mechanical process, precast box culvert box
The height of body 4 suitably reduces compared with theoretical value, to adapt to the adjustment space of the support bar 2 of duct piece float upward situation.
In a specific embodiment, the inwall of sleeve 1 is milled with internal thread, and the outer wall of support bar 2 is milled with external screw thread, and
Internal thread is engaged with external screw thread, support bar 2 is rotatably connected in sleeve 1, and is fixed in sleeve 1.
Specifically, the depth screwed in by adjusting support bar 2 inside sleeve 1, is located at precast box culvert box to change support bar 2
Length outside body 4, so as to change the height and position of prefabricated box culvert casing 4, that is, reach lifting or reduce prefabricated box culvert casing 4
Purpose.By the way of support bar 2 spins the inside of sleeve 1, it is not only simple in structure, it is easy to accomplish, and can effectively improve pre-
The control accuracy of the height and position of box culvert casing 4 processed.
In another specific embodiment, at least two through holes are provided with support bar 2, through hole is along support bar 2
Radial direction runs through support bar 2.Spaced apart between two neighboring through hole, the distance between two neighboring through hole can root
According to the height degree of regulation demand relative set of prefabricated box culvert casing 4.I.e. degree of regulation requires higher, between two neighboring through hole
Distance it is smaller.It is to be noted that to ensure the distance between the support strength demand, two neighboring through hole of support bar 2 no
Can be too small.
When it is determined that shield tunnel construction conduction accumulated error after, according to the accumulated error, it is determined that being located at precast box culvert box
The length of support bar 2 outside body 4 or the grafting of support bar 2 enter the depth inside prefabricated box culvert casing 4.Determine the grafting of support bar 2
After entering the depth inside prefabricated box culvert casing 4, the grafting horizontal support bar in corresponding through hole, and the top of support bar 2 is inserted
The inside of prefabricated box culvert casing 4 is accessed, the upper surface of horizontal support bar is adjacent to the bottom of prefabricated box culvert casing 4, so as to play
Support the effect of prefabricated box culvert casing 4.
Specifically, the size for the accumulated error conducted according to shield tunnel construction, support bar 2 is plugged into by horizontal support bar
Corresponding to upper in through hole, i.e., it can play a part of adjusting the height and position of prefabricated box culvert casing 4.
During using setting the structure of through hole and grafting horizontal support bar on support bar 2, the outer wall of support bar 2 can be milled with
Externally threaded screw-rod structure, correspondingly, the inwall of sleeve 1 can be milled with internal thread.Support bar 2 can also be not externally threaded
Straight-bar structure, correspondingly, the inwall of sleeve 1 can be not provided with internal thread.
Support bar 2 outer wall be milled with it is externally threaded on the basis of, in conjunction with the through hole set on support bar 2, one can be entered
Support and locating effect of the step enhancing support bar 2 to prefabricated box culvert casing 4.
In another specific embodiment, support bar 2 has multiple, also, is symmetrically plugged in precast box culvert box two-by-two
Inside the wall of body 4.When support bar 2 has multiple, corresponding sleeve 1 also have it is multiple, i.e., each support bar 2 be plugged in correspondingly
Sleeve 1 inside.
When support bar 2 has multiple, support bar 2 can be distributed in prefabricated box culvert casing 4 close to the place of periphery；Example
Such as, support bar 2 can be arranged on inside the side wall of prefabricated box culvert casing 4, also, in the relative side wall of prefabricated box culvert casing 4
Support bar 2 is symmetrical arranged, makes supporting role of the support bar 2 to prefabricated box culvert casing 4 more firm.
In another specific embodiment, the ratio between the diameter of support bar 2 and the thickness of wall is 0.1~0.2.
Specifically, when support bar 2 is plugged in prefabricated box culvert 4 inside of casing, the ratio of the diameter of support bar 2 and the thickness of wall is set
Put in suitable scope, while can making support bar 2 that there is more preferable supporting role to prefabricated box culvert casing 4, branch can be reduced
The consumptive material of strut 2, reduce cost.It is understood that when support bar 2 is cylindrical shape, using the thickness of its diameter and wall
Degree is compared；When support bar 2 is other shapes, the parameters such as its circumscribed circle/inscribed circle diameter, width or thickness can be used, with
It is determined that the relation between the thickness of wall.
In another specific embodiment, base 3, and the cross-sectional area of base 3 are connected with the bottom of support bar 2
More than the cross-sectional area of support bar 2.Specifically, support bar 2 can be integrally formed or be spirally connected, rivet with base 3
Or weld together.The area of section of base 3 is more than the area of section of support bar 2, can make support bar 2 is more stable to be fixed on
The bottom of shield tunnel segment lining.
In another specific embodiment, the downside of base 3 is provided with rubber sheet gasket 5.Specifically, rubber sheet gasket 5
Orlop is arranged on, may be configured as wedge shape, to ensure the reliable power transmission between support bar 2 and shield tunnel segment lining, meanwhile,
It is adapted the inner face of itself and shield tunnel segment lining.
In work progress, prefabricated box culvert specific embodiment is：
A, when making prefabricated box culvert casing 4, i.e., sleeve 1 is reliably fixed on to the relevant position of prefabricated box culvert casing 4；
B, the construction accumulated error △ of 4 assembled position of shield tail rear prefabricated box culvert casing is measured2；
C, the construction accumulated error △ obtained according to measurement2, the adjustment grafting of support bar 2 enters the depth in sleeve 1, and is propping up
The lower end of strut 2 sequentially firm banking 3 and rubber sheet gasket 5, make the top surface lifting of prefabricated box culvert casing 4 or reduce height △1；Should
Process can be completed before prefabricated box culvert is gone into the well, to ensure the precision of regulation；
D, by prefabricated box culvert assembly to precalculated position；Then the construction accumulated error of prefabricated box culvert is by original △2It is reduced to
△2-△1；
E, applying for connecting inner structure pours slightly expanded concrete in prefabricated box culvert casing side wall bottom, by sleeve 1 with
Space filling between prefabricated box culvert casing 4 is closely knit.
It is understood that the setting quantity of sleeve 1, the length of support bar 2 can be according to the weights of actual prefabricated box culvert casing
Amount, size integrating tunnel formation condition, construction level synthesis determine.
According to another aspect of the present invention, a kind of distribution method of prefabricated box culvert, including：
Step S1, while prefabricated box culvert casing is made, sleeve is vertically embedded to the precast box culvert box
In the wall of body bottom；
Step S2, the construction accumulated error of the prefabricated box culvert casing assembly position obtained according to measurement, adjustment support bar are inserted
Access the depth of the sleeve inner and fixation；
Step S3, one end sequentially firm banking and rubber blanket away from the prefabricated box culvert casing on the support bar
Piece；
Step S4, by prefabricated box culvert assembly to specified location, with reference to applying for shield tunnel segment lining internal structure,
The bottom of prefabricated box culvert casing pours space of the slightly expanded concrete between sold stowing sleeve and prefabricated box culvert casing.
A kind of prefabricated box culvert and its distribution method of the present invention, its sleeve 1 in prefabricated box culvert casing 4, support bar 2
Top is plugged in sleeve 1, and by setting external screw thread or the through hole being disposed radially on support bar 2, adjustment support bar 2 is inserted
The depth accessed inside sleeve 1, to adjust the height and position of prefabricated box culvert casing 4, so as to eliminate or reduce shield tunnel construction
Conduct to the accumulated error on prefabricated box culvert casing 4.
Finally, method of the invention is only preferable embodiment, is not intended to limit the scope of the present invention.It is all
Within the spirit and principles in the present invention, any modification, equivalent substitution and improvements made etc., the protection of the present invention should be included in
Within the scope of.
Claims (8)
- A kind of 1. prefabricated box culvert, it is characterised in that including：The support bar of vertical height can be adjusted and by the they sup-port Prefabricated box culvert casing in shield tunnel segment lining bottom；It is embedded with inside the wall of the prefabricated box culvert lower box hollow Sleeve, the sleeve vertically sets, and opening, the institute concordant with the bottom end face of the wall of the sleeve lower end The top for stating support bar is plugged in the sleeve.
- 2. a kind of prefabricated box culvert as claimed in claim 1, it is characterised in that the inwall of the sleeve is milled with internal thread, described The outer wall of support bar is milled with the external screw thread being engaged with the internal thread.
- 3. a kind of prefabricated box culvert as claimed in claim 1 or 2, it is characterised in that along the support bar on the support bar Radial direction is provided through the through hole of the support bar, the through hole at least two；Below the wall and press close to Horizontal support bar is plugged with the through hole of the wall, the upper surface of the horizontal support bar is adjacent to the wall bottom.
- A kind of 4. prefabricated box culvert as claimed in claim 3, it is characterised in that the support bar have it is multiple, and two-by-two symmetrically Vertically it is plugged in inside the wall of the prefabricated box culvert casing.
- 5. a kind of prefabricated box culvert as described in claim 1 or 4, it is characterised in that the diameter of the support bar and the wall Thickness between ratio be 0.1~0.2.
- 6. a kind of prefabricated box culvert as claimed in claim 5, it is characterised in that the bottom of the support bar is connected with base, institute The cross-sectional area for stating base is more than the cross-sectional area of the support bar.
- 7. a kind of prefabricated box culvert as claimed in claim 6, it is characterised in that be provided with rubber sheet gasket on the downside of the base.
- A kind of 8. distribution method of prefabricated box culvert, it is characterised in that including：Step S1, while prefabricated box culvert casing is made, sleeve is vertically embedded under the prefabricated box culvert casing In the wall in portion；Step S2, the construction accumulated error of the prefabricated box culvert casing assembly position obtained according to measurement, adjustment support bar grafting enter The depth of the sleeve inner and fixation；Step S3, one end sequentially firm banking and rubber sheet gasket away from the prefabricated box culvert casing on the support bar；Step S4, by prefabricated box culvert assembly to specified location, with reference to applying for shield tunnel segment lining internal structure, prefabricated The bottom of box culvert casing pours space of the slightly expanded concrete between sold stowing sleeve and prefabricated box culvert casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710916730.XA CN107725065A (en) | 2017-09-30 | 2017-09-30 | A kind of prefabricated box culvert and its distribution method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710916730.XA CN107725065A (en) | 2017-09-30 | 2017-09-30 | A kind of prefabricated box culvert and its distribution method |
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| Publication Number | Publication Date |
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| CN107725065A true CN107725065A (en) | 2018-02-23 |
Family
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710916730.XA Pending CN107725065A (en) | 2017-09-30 | 2017-09-30 | A kind of prefabricated box culvert and its distribution method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108708752A (en) * | 2018-07-27 | 2018-10-26 | 西南交通大学 | The method that the tunnels TBM apply the supporting apparatus and beans gravel rockfill grouting of section of jurisdiction |
| CN112983465A (en) * | 2021-03-16 | 2021-06-18 | 中铁第四勘察设计院集团有限公司 | Fully-prefabricated internal structure of shield tunnel and construction method |
| CN113586085A (en) * | 2021-08-26 | 2021-11-02 | 鲍怡 | Quick positioner is connected to prefabricated box culvert structure that shield tunnel used |
| CN114320342A (en) * | 2021-12-10 | 2022-04-12 | 力信测量(上海)有限公司 | Installation method and system of arc-shaped box culvert in tunnel |
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| JPH09256450A (en) * | 1996-03-26 | 1997-09-30 | Towa Jiyuuken:Kk | Concrete structure |
| JP2007284989A (en) * | 2006-04-17 | 2007-11-01 | Kajima Corp | Tunnel interior building method |
| CN201358579Y (en) * | 2009-01-06 | 2009-12-09 | 广州市市政集团有限公司 | Adjustable support bracket device |
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| CN103669114A (en) * | 2012-09-06 | 2014-03-26 | 隔而固(青岛)振动控制有限公司 | Ballast bed base prefabricated slab and application thereof |
| CN206000538U (en) * | 2016-08-31 | 2017-03-08 | 中铁六局集团有限公司 | A kind of shield machine trailing type trestle device |
| CN207212351U (en) * | 2017-09-30 | 2018-04-10 | 中铁第四勘察设计院集团有限公司 | A kind of Height Adjustable prefabricated box culvert structure |
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| JPH09256450A (en) * | 1996-03-26 | 1997-09-30 | Towa Jiyuuken:Kk | Concrete structure |
| JP2007284989A (en) * | 2006-04-17 | 2007-11-01 | Kajima Corp | Tunnel interior building method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108708752A (en) * | 2018-07-27 | 2018-10-26 | 西南交通大学 | The method that the tunnels TBM apply the supporting apparatus and beans gravel rockfill grouting of section of jurisdiction |
| CN108708752B (en) * | 2018-07-27 | 2023-11-24 | 西南交通大学 | Temporary supporting device for TBM tunnel construction segment and bean gravel backfill grouting method |
| CN112983465A (en) * | 2021-03-16 | 2021-06-18 | 中铁第四勘察设计院集团有限公司 | Fully-prefabricated internal structure of shield tunnel and construction method |
| CN113586085A (en) * | 2021-08-26 | 2021-11-02 | 鲍怡 | Quick positioner is connected to prefabricated box culvert structure that shield tunnel used |
| CN114320342A (en) * | 2021-12-10 | 2022-04-12 | 力信测量(上海)有限公司 | Installation method and system of arc-shaped box culvert in tunnel |
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