CN104265306B - A kind of municipal administration shield tunnel - Google Patents
A kind of municipal administration shield tunnel Download PDFInfo
- Publication number
- CN104265306B CN104265306B CN201410369723.9A CN201410369723A CN104265306B CN 104265306 B CN104265306 B CN 104265306B CN 201410369723 A CN201410369723 A CN 201410369723A CN 104265306 B CN104265306 B CN 104265306B
- Authority
- CN
- China
- Prior art keywords
- support
- tunnel
- prefabricated pipe
- municipal administration
- shield tunnel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/0607—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield being provided with devices for lining the tunnel, e.g. shuttering
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/08—Lining with building materials with preformed concrete slabs
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
- E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
Abstract
The invention discloses a kind of municipal administration shield tunnel, the prefabricated pipe that is connected in series including multiple, arch steel perimeter beam, described prefabricated pipe inwall is along the circumferential direction embedded with multiple installing hole, described steel perimeter beam is close to described prefabricated pipe inwall, described steel perimeter beam has the installation frame towards axle center, described tunnel, the described installation uniform connection of frame circumferencial direction has multiple first support and/or the second support, described second support is arranged at the installation frame corresponding with tunnel waist location, and described second support is longer than described first support.Municipal administration shield tunnel of the present invention in prefabricated pipe pre-buried installing hole to replace prior art weld or bore mode, it is more convenient for workmen's mounting arch ellbeam in tunnel, prefabricated pipe is close to by arched girder simultaneously, enhance the bearing capacity in tunnel, and be evenly distributed on arched girder for placing cable, pipeline, the first support of affiliated facility and the second support, Appropriate application space, and it is greatly saved tunneltron appearance.
Description
Technical field
The present invention relates to a kind of tunnel, especially relate to a kind of municipal administration shield tunnel.
Background technology
Municipal administration shield tunnel, builds at Urban Underground, is used as to lay the tunnel of various urban operating mechanism underground utilities
Road.Due to developing industry further in city and the needs of raising resident's culture life condition, set for municipal administration
The underground utilities used get more and more, as power supply, tap water, sewage, heating installation, hot water, coal gas, communication,
Power supply etc..The development of pipeline system, needs to build in a large number municipal tunnel, in order to fundamentally solve various
The management level problem of the underground pipeline system of urban operating mechanism.Arranging the passage of underground, pipeline, cable
Time, should there be strict order and system, in order to avoid street to be excavated and square when overhauling and rebuild.
At present, a diameter of the 5 of major diameter municipal tunnel～7m, tunnel can be divided into upper and lower 2 layers, and
Welding tunnel frame etc. in tunnel, and a diameter of the 2 of minor diameter municipal tunnel～4m, the peace in major diameter tunnel
Dress method tends not to be applied to wherein, and for municipal tunnel, has a following defect:
One, inner support system in tunnel is used for laying the municipal pipeline such as cable, pipeline, the joint of municipal pipeline,
The affiliated facility volume ratio pipelines such as switch are much larger, need special backing positions to lay.This allows for quite
Part tunneltron appearance spends on pipe joint, affiliated facility, causes pipe to hold serious waste；On additionally,
If the pipeline on portion's dried layer support is both needed to around walking to install in lower bracket affiliated facility so that pipeline is vertical
Interfere to direction and affect tunnel space, having a strong impact on the O&M service work in tunnel.
Two, when the prefabricated pipe in composition tunnel is prefabricated, reserved groove inside prefabricated pipe, is assembled into prefabricated pipe section
After ring is installed on tunnel, the reserved groove of steel perimeter beam embedding prefabricated pipe is interior and is locked at groove inner wall.This work
Although steel perimeter beam fastening can be installed by method, but the bulk deviation that constructing tunnel produces is by inside tunnel
Groove passes to cable bearer, and then is delivered on support cross-arm so that support cross-arm is difficult to be horizontally mounted,
Affect the normal ornaments of the pipeline on stent cover, cable etc..
Three, support cross-arm is fixed on the installation process such as tunnel and uses when being welded to connect, in narrow and small tunnel
Producing a large amount of smog, construction environment is the most severe.
Four, support cross-arm is simply fixed on tunnel inner wall so that the carries such as cable, pipeline, affiliated facility
After on support, the stress being delivered to tunnel inner wall is relatively big, seriously may result in tunnel duct piece cracking.
Summary of the invention
Based on this, the invention reside in the defect overcoming prior art, it is provided that a kind of efficiency of construction is high, rationally
Utilize space, the municipal shield tunnel of saving material.
Its technical scheme is as follows: a kind of municipal administration shield tunnel, the prefabricated pipe that is connected in series including multiple, arch
Shape steel perimeter beam, described prefabricated pipe inwall is along the circumferential direction embedded with multiple installing hole, and described steel perimeter beam is close to
Described prefabricated pipe inwall, described steel perimeter beam has the installation frame towards axle center, tunnel, described installation frame
Connecting has multiple first support and the second support, described second support to be arranged on corresponding with tunnel waist location
Installation frame at, described second support is longer than described first support.
Below further technical scheme is illustrated:
Preferably, corresponding with described tunnel waist location described prefabricated pipe sidewall is axially spaced to be provided with
First brace sections, the second brace sections, arrange described first with the prefabricated pipe sidewall of described second support opposition
Support.
Preferably, described steel perimeter beam includes the first Curved beam, the second Curved beam, described first Curved beam with
Described second Curved beam connecting plate removably connects.
Preferably, described first Curved beam, the second Curved beam are equipped with fixing hole, described connecting plate two ends
It is respectively equipped with the bar hole corresponding with described fixing hole.
Preferably, described first Curved beam and described second Curved beam are individually fixed in described prefabricated pipe inwall
Both sides, have the bottom platform being made up of concrete, are provided with in described bottom platform bottom described prefabricated pipe
Raceway groove, described first Curved beam one end, second Curved beam one end are all fixing with described bottom platform to be connected,
There is between the described first Curved beam other end, the described second Curved beam other end gap and be arranged on described
Prefabricated pipe top.
Preferably, described first Curved beam includes the first angle steel and the second angle steel being arranged side by side, described
Two Curved beams include the third angle steel and the fourth angle steel being arranged side by side.
Preferably, multiple described installing holes are along the described prefabricated pipe uniform setting of inwall circumferencial direction, described
The both sides of steel perimeter beam are all disposed with described installing hole, also include multiple first pressure strip, described steel perimeter beam
Both sides are equipped with described first pressure strip, and described first pressure strip is close to described steel perimeter beam, described first pressure
Tight plate is fixed on described installing hole by the first fixture.
Preferably, multiple described installing holes are along the described prefabricated pipe uniform setting of inwall circumferencial direction, described
The both sides of steel perimeter beam are all disposed with described installing hole, also include multiple second pressure strip, and each described second
Pressure strip has the groove engaged with described installation frame, and described groove ends outward flanging is close to described steel
Ring beam, and the two ends of described second pressure strip are fixed on described installing hole by the first fixture respectively.
Preferably, described first support is provided with cable or pipeline, described second support be provided with cable or
Pipeline pipeline and affiliated facility, described affiliated facility relative to described cable or pipeline closer to described tunnel
Axle center, road.
Preferably, described first support and described second support are longitudinal in being arranged alternately along tunnel structure, tunnel
On cross section, road, the cable on described first support or pipeline need erection joint, affiliated facility, switch, valve
Men Shi, around walking to enforcement on described second support.
Below the principle of preceding solution, effect etc. are illustrated:
1, of the present invention municipal administration shield tunnel in prefabricated pipe pre-buried installing hole to replace prior art weld
Or bore mode, it being more convenient for workmen's mounting arch ellbeam in tunnel, arched girder is close to pre-simultaneously
Tubulation, enhances the bearing capacity in tunnel, and be evenly distributed on arched girder for place cable, pipeline,
First support of affiliated facility and the second support, Appropriate application space, and it is greatly saved tunneltron appearance.
2, in prefabricated pipe, axially spaced-apart arranges the first brace sections, the second brace sections, needs to prolong according to cabling
Long first support, it is to avoid support arranges and too much causes vacant wasting phenomenon, and the second support is not in prefabricated pipe
Same place opposition is arranged, to increase the middle part activity space of prefabricated pipe.
3, steel perimeter beam is formed by connecting by two Curved beam connecting plates, and two Curved beams lay respectively at prefabricated
Having gap between inside pipe wall both sides, and every Curved beam top, connecting plate is respectively arranged at two ends with bar hole,
When tunnel tilts, two Curved beams of adjustable are in the position of prefabricated pipe inwall, to keep support level to pacify
Dress, it is to avoid cable, pipeline and affiliated facility on support install wild effect, the most each arc
Beam is formed by two pieces of angle splice joints, can be easy to transport of materials, installation etc..
Accompanying drawing explanation
Fig. 1 is the structural representation one of municipal administration shield tunnel described in the embodiment of the present invention；
Fig. 2 is the structural representation two of municipal administration shield tunnel described in the embodiment of the present invention；
Fig. 3 is Fig. 1 sectional view one at A-A；
Fig. 4 illustrates the partial schematic diagram that steel perimeter beam is fixed on prefabricated pipe section by fixed plate；
Fig. 5 is Fig. 1 sectional view two at A-A；
Fig. 6 is the exploded perspective view of Fig. 5；
Fig. 7 is illustrated adjacent steel ring beam and is fixed the structural representation of connection by connecting plate；
Fig. 8 is Fig. 7 sectional view at B-B.
Description of reference numerals:
10, prefabricated pipe, 11, installing hole, the 12, first fixture, the 13, first pressure strip, 14,15,
16,17, pad, the 18, second pressure strip, the 21, first Curved beam, the 211, first angle steel, 212,
Second angle steel, the 22, second Curved beam, 221, the third angle steel, 222, fourth angle steel, 30, first
Frame, the 31, second support, 41, raceway groove, 42, bottom platform, 43, cover plate, 50, connecting plate, 51,
Bar hole, the 52, second fixture, 60, cable or pipeline, 70, affiliated facility.
Detailed description of the invention
Below embodiments of the invention are described in detail:
As it is shown in figure 1, municipal administration shield tunnel of the present invention, including multiple prefabricated pipe being connected in series
10, arch steel perimeter beam, described prefabricated pipe 10 inwall is along the circumferential direction embedded with multiple installing hole 11, described steel
Ring beam is close to described prefabricated pipe 10 inwall, and described steel perimeter beam has the installation limit towards axle center, described tunnel
Frame, please also refer to Fig. 2, the described installation uniform connection of frame circumferencial direction has multiple first support 30 He
Second support 31, described second support 31 is arranged at the installation frame corresponding with tunnel waist location, institute
State the second support 31 longer than described first support 30.
Of the present invention municipal administration shield tunnel in prefabricated pipe 10 pre-buried installing hole 11 to replace prior art
Welding or bore mode, be more convenient for workmen's mounting arch ellbeam in tunnel, and arched girder is close to simultaneously
In prefabricated pipe 10, enhance the bearing capacity in tunnel, and be evenly distributed on arched girder for placing cable
Or the first support 30 and the second support 31 of pipeline 60, affiliated facility 70, Appropriate application space, and greatly
Save greatly tubing.
Wherein, described tunnel waist location is corresponding described prefabricated pipe 10 sidewall is axially spaced arranges first
30 sections of support, 31 sections of the second support, and described prefabricated pipe 10 sidewall that described tunnel waist location is corresponding
When described second support 31 is set, arrange described with prefabricated pipe 10 sidewall of described second support 31 opposition
First support 30.Described first support 30 is provided with cable or pipeline 60, and described second support 31 sets
Having cable or pipeline and affiliated facility 70, described affiliated facility 70 is relative to described cable or pipeline 60
Closer to axle center, described tunnel.In embodiments of the present invention, described first support 30 and described second support
31 is longitudinal in being arranged alternately along tunnel structure, the cable on described first support 30 or pipeline on cross section, tunnel
60 when needing erection joint, affiliated facility, switch, valve, implements around walking on described second support 31.
In prefabricated pipe 10, axially spaced-apart arranges the first brace sections, the second brace sections, needs to extend the according to cabling
One support 30, it is to avoid support arranges the too much or long support vacant waste tubing phenomenon that causes, and second
Support 31 is not arranged in prefabricated pipe 10 same place opposition, to increase the middle part activity space of prefabricated pipe 10.
Referring again to Fig. 7,8, described steel perimeter beam includes first Curved beam the 21, second Curved beam 22, described
First Curved beam 21 removably connects with described second Curved beam 22 connecting plate 50.Described first arc
Beam the 21, second Curved beam 22 is equipped with fixing hole, and described connecting plate 50 is respectively arranged at two ends with solid with described
Determine bar hole corresponding to hole 51.Described first Curved beam 21 is individually fixed in described second Curved beam 22
Described prefabricated pipe 10 inwall both sides, have, bottom described prefabricated pipe 10, the bottom platform being made up of concrete
42, it is provided with raceway groove 41, described first Curved beam 21 one end, the second Curved beam in described bottom platform 42
22 one end are all fixing with described bottom platform 42 to be connected, described first Curved beam 21 other end, described the
There is between two Curved beam 22 other ends gap and be arranged at described prefabricated pipe 10 top.
In embodiments of the present invention, the first angle steel 211 that described first Curved beam 21 includes being arranged side by side with
Second angle steel 212, described second Curved beam 22 includes the third angle steel 221 and the fourth angle steel being arranged side by side
222.I.e. steel perimeter beam is by first angle steel the 211, second angle steel 212, the third angle steel 221, fourth angle steel 222
Splicing composition, material is readily transported and assembles.
Referring again to Fig. 3,4, wherein in an embodiment, multiple described installing holes 11 are along described pre-
The uniform setting of tubulation 10 inwall circumferencial direction, the both sides of described steel perimeter beam are all disposed with described installing hole 11,
Also including multiple first pressure strip 13, the both sides of described steel perimeter beam are equipped with described first pressure strip 13, institute
Stating the first pressure strip 13 and be close to described steel perimeter beam, described first pressure strip 13 is solid by the first fixture 12
Due to described installing hole 11, in embodiments of the present invention, installing hole 11 can be bolt hole, and first fixes
Part 12 can use bolt, can be provided with pad 14, simultaneously between installing hole 11 and the first pressure strip 13
May select, between the first fixture 12 and described first pressure strip 13, pad 15 is set, to strengthen angle steel
Fixed effect.
Referring again to Fig. 5,6, in another embodiment, multiple described installing holes 11 are along described prefabricated
The uniform setting of pipe 10 inwall circumferencial direction, the both sides of described steel perimeter beam are all disposed with described installing hole 11, also
Including multiple second pressure strips 18, each described second pressure strip 18 has and engages with described installation frame
Groove, described groove ends outward flanging is close to described steel perimeter beam (not illustrating steel perimeter beam in Fig. 6),
Described installing hole 11 is fixed on by the first fixture 12 respectively in the two ends of described second pressure strip 18.?
In the embodiment of the present invention, pad 17 can be provided with between installing hole 11 and the second pressure strip 18, and can
Select between the first fixture 12 and described second pressure strip 18, to arrange pad 16, to strengthen consolidating of angle steel
Determine effect.
To sum up, present invention have the advantage that
1, of the present invention municipal administration shield tunnel in prefabricated pipe 10 pre-buried installing hole 11 to replace existing skill
Art welding or bore mode, be more convenient for workmen's mounting arch ellbeam in tunnel, and arched girder is tight simultaneously
It is affixed on prefabricated pipe 10, enhances the bearing capacity in tunnel, and be evenly distributed on arched girder for placing electricity
Cable, pipeline, the first support 30 and the second support 31 of affiliated facility 70, Appropriate application space, and greatly
Save greatly tubing.
2, in prefabricated pipe 10, axially spaced-apart arranges 30 sections of the first support, 31 sections of the second support, according to walking
Line needs to extend the first support 30, it is to avoid support arranges and too much causes vacant wasting phenomenon, and second
Frame 31 is not arranged in prefabricated pipe 10 same place opposition, to increase the middle part activity space of prefabricated pipe 10.
3, steel perimeter beam is formed by connecting by two Curved beam connecting plates 50, and two Curved beams lay respectively at
Having gap between prefabricated pipe 10 inwall both sides, and every Curved beam top, connecting plate 50 two ends are respectively
Be provided with bar hole 51, when tunnel tilts, two Curved beams of adjustable in the position of prefabricated pipe 10 inwall,
To keep support level to install, it is to avoid cable, pipeline and affiliated facility 70 on support install instability
Phenomenon, the most each Curved beam is formed by two pieces of angle splice joints, can be easy to transport of materials, installation etc..
Embodiment described above only have expressed the detailed description of the invention of the present invention, and it describes more concrete and detailed
Carefully, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that, for
For those of ordinary skill in the art, without departing from the inventive concept of the premise, it is also possible to if making
Dry deformation and improvement, these broadly fall into protection scope of the present invention.
Claims (10)
1. a municipal shield tunnel, it is characterised in that include multiple be connected in series prefabricated pipe, arch steel
Ring beam, described prefabricated pipe inwall is along the circumferential direction embedded with multiple installing hole, and described steel perimeter beam is close to described pre-
Tubulation inwall, described steel perimeter beam has the installation frame towards axle center, tunnel, and the connection of described installation frame has many
Individual first support and the second support, described second support is arranged on the installation frame corresponding with tunnel waist location
Place, described second support is longer than described first support.
Municipal administration shield tunnel the most according to claim 1, it is characterised in that with described tunnel loin
The described prefabricated pipe sidewall putting correspondence axially spaced is provided with the first brace sections, the second brace sections, with described
The prefabricated pipe sidewall of the second support opposition arranges described first support.
Municipal administration shield tunnel the most according to claim 1, it is characterised in that described steel perimeter beam includes the
One Curved beam, the second Curved beam, described first Curved beam detachably connects with described second Curved beam connecting plate
Connect.
Municipal administration shield tunnel the most according to claim 3, it is characterised in that described first Curved beam,
Second Curved beam is equipped with fixing hole, and described connecting plate is respectively arranged at two ends with the bar shaped corresponding with described fixing hole
Hole.
The most according to claim 3 municipal administration shield tunnel, it is characterised in that described first Curved beam with
Described second Curved beam is individually fixed in described prefabricated pipe inwall both sides, has by coagulation bottom described prefabricated pipe
The bottom platform that soil is made, is provided with raceway groove, described first Curved beam one end, the second arc in described bottom platform
Ellbeam one end is all fixing with described bottom platform to be connected, the described first Curved beam other end, described second arc
There is between the beam other end gap and be arranged on described prefabricated pipe top.
Municipal administration shield tunnel the most according to claim 3, it is characterised in that described first Curved beam bag
Including the first angle steel and the second angle steel being arranged side by side, described second Curved beam includes the third angle steel being arranged side by side
With fourth angle steel.
Municipal administration shield tunnel the most according to claim 1, it is characterised in that multiple described installing hole edges
The described prefabricated pipe uniform setting of inwall circumferencial direction, the both sides of described steel perimeter beam are all disposed with described installing hole,
Also including multiple first pressure strip, the both sides of described steel perimeter beam are equipped with described first pressure strip, and described first
Pressure strip is close to described steel perimeter beam, and described first pressure strip is fixed on described installing hole by the first fixture.
Municipal administration shield tunnel the most according to claim 1, it is characterised in that multiple described installing hole edges
The described prefabricated pipe uniform setting of inwall circumferencial direction, the both sides of described steel perimeter beam are all disposed with described installing hole,
Also include that multiple second pressure strip, each described second pressure strip have the groove engaged with described installation frame,
Described groove ends outward flanging is close to described steel perimeter beam, and the two ends of described second pressure strip are respectively by the
One fixture is fixed on described installing hole.
Municipal administration shield tunnel the most according to claim 1, it is characterised in that set on described first support
Cable or pipeline, described second support is had to be provided with cable or pipeline and affiliated facility, described affiliated facility
Relative to described cable or pipeline closer to axle center, described tunnel.
The most according to claim 9 municipal administration shield tunnel, it is characterised in that described first support and
Described second support is longitudinal in being arranged alternately along tunnel structure, the cable on described first support on cross section, tunnel
Or municipal pipeline is when needing erection joint, affiliated facility, switch, valve, around walking on described second support
Implement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410369723.9A CN104265306B (en) | 2014-07-30 | 2014-07-30 | A kind of municipal administration shield tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410369723.9A CN104265306B (en) | 2014-07-30 | 2014-07-30 | A kind of municipal administration shield tunnel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104265306A CN104265306A (en) | 2015-01-07 |
| CN104265306B true CN104265306B (en) | 2016-10-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410369723.9A Active CN104265306B (en) | 2014-07-30 | 2014-07-30 | A kind of municipal administration shield tunnel |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104747206B (en) * | 2015-03-18 | 2017-01-25 | 济南轨道交通集团有限公司 | Shield tunnel segment structure considering municipal cable pipelines and installing method |
| CN106761850A (en) * | 2016-11-18 | 2017-05-31 | 国网北京市电力公司 | Glass shield shell and its installation method |
| CN107630719A (en) * | 2017-10-16 | 2018-01-26 | 中国恩菲工程技术有限公司 | The pipeline fixed structure of vertical shaft |
| CN109653768A (en) * | 2018-12-29 | 2019-04-19 | 北京城建信捷轨道交通工程咨询有限公司 | Adjustable support, shield duct piece and adjusting method for shield duct piece inner wall |
| CN111208005A (en) * | 2020-01-19 | 2020-05-29 | 广州电力设计院有限公司 | Testing device and testing system of cable installation structure |
| CN111614011A (en) * | 2020-05-20 | 2020-09-01 | 中电建十一局工程有限公司 | Method for mounting assembled arc-shaped power cable bracket |
| CN115749950B (en) * | 2022-11-01 | 2023-06-13 | 北京爱普电力股份有限公司 | Electric power tunnel construction equipment |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2917776B1 (en) * | 2007-06-25 | 2009-09-04 | Bouygues Travaux Publics Sa | TUNNEL COATING TIGHTS AND METHOD OF MAINTAINING THE SKIRT OF A TUNNELIER. |
| CN101614304B (en) * | 2009-08-05 | 2011-01-12 | 北京市政建设集团有限责任公司 | Fixing force transfer bracket for thermodynamic pipe in thermodynamic shield tunnel |
| CN101761344B (en) * | 2010-01-14 | 2012-05-30 | 华南理工大学 | Preparation method of prefabricated pipe section for shield tunnel |
| KR101240334B1 (en) * | 2010-06-09 | 2013-03-06 | 우근우 | Under-ground structure construction method using steel pipe with bended guide pannel |
| CN204113295U (en) * | 2014-07-30 | 2015-01-21 | 广州电力设计院 | A kind of municipal shield tunnel |
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