CN108240226B - It closely overlaps the reserved shield sky of subway tunnel synchronized construction and pushes away condition construction method - Google Patents
It closely overlaps the reserved shield sky of subway tunnel synchronized construction and pushes away condition construction method Download PDFInfo
- Publication number
- CN108240226B CN108240226B CN201810140707.0A CN201810140707A CN108240226B CN 108240226 B CN108240226 B CN 108240226B CN 201810140707 A CN201810140707 A CN 201810140707A CN 108240226 B CN108240226 B CN 108240226B
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- Prior art keywords
- section
- shield
- construction
- jurisdiction
- subway tunnel
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
-
- 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
Abstract
The reserved shield sky of subway tunnel synchronized construction is overlapped the invention discloses a kind of short distance and pushes away condition construction method, and two Subway Tunnel transposition sections are placed in the same foundation pit and are excavated；In the foundation pit of excavation, the structure for lower part Subway Tunnel of first constructing, then the structure for top Subway Tunnel of constructing, it is then blocked on the outside of shield hole, rest part carries out earthing backfill in addition to hoisting port, restores road surface and traffic；The node finally is sequentially passed through according to four shield machines of specific sequence of construction, completes the construction in tunnel.Two Subway Tunnel transposition sections are carried out My Perspective On The Co-building by the present invention, the condition in the crosspoint is crossed in break-through under reserved later period Subway Tunnel shield, both guaranteed that new subway section passed through safely crosspoint and backfills earthing in time, the traffic of upper base is not influenced, and guarantees not influence existing structure of the subway and traffic above-ground when later period Subway Tunnel safely and fast passes through the crosspoint.
Description
Technical field
Subway tunnel synchronized construction, which is overlapped, the present invention relates to a kind of short distance reserves the construction method that shield sky pushes away condition.
Background technique
Currently, subway is all being built in each city energetically, common planning subway line is more, builds the duration by stages and in groups
Longer, the construction period of a subway line is about 5 years, and is predominantly located in the busy area in city, and ground surrounding enviroment are more and more multiple
It is miscellaneous, aboveground space cannot be occupied for a long time.But since Subway Tunnel is interspersed staggeredly, construction timing is different, and design and construction are complicated, often
The problem of appearance engineering construction intersects, or the subway line built up is stopped transport because of the construction of new line.
Because subway construction investment is huge, specifically co-ordination amount is larger when construction, though the general subway line same period is planned,
Successively, route is built in batches one by one for construction.City underground running tunnel mostly uses shield construction, when two Subway Tunnel tunnels
Road top-bottom cross and when being closer, completed works is protected.And when some engineerings distance is close to a certain extent
When, because limited space is difficult to take safeguard measure, at this point, need to be comprehensively considered, node of two engineerings at this is carried out
Matching planning, Integral synchronous design, Engineering Interface is implemented and reserved to the same period, and the crosspoint is worn under construction in later period subway
When, traffic above-ground is not influenced as far as possible, reduces the influence to ground existing structure.
Summary of the invention
It is synchronous the purpose of the present invention is to overcome above-mentioned the deficiencies in the prior art, providing a kind of overlapping subway tunnel of short distance
The construction method that reserved shield sky pushes away condition is built, the construction method is on the basis of existing cut and cover tunneling, by two tablelands
Iron midpoint crossing section carries out My Perspective On The Co-building, and the condition in the crosspoint is crossed in break-through under reserved later period Subway Tunnel shield, both guarantees
New subway section passes through safely crosspoint and backfills earthing in time, does not influence the traffic of upper base, and guarantee later period subway
Existing structure of the subway and traffic above-ground are not influenced when section safely and fast passes through the crosspoint.
To achieve the above object, the present invention adopts the following technical solutions:
It closely overlaps the reserved shield sky of subway tunnel synchronized construction and pushes away condition construction method, which is characterized in that by two
Subway Tunnel transposition section is placed in the same foundation pit and is excavated；In the foundation pit of excavation, the knot for lower part Subway Tunnel of first constructing
Structure, then the structure for top Subway Tunnel of constructing, then block on the outside of shield hole, and rest part carries out earthing in addition to hoisting port
Backfill restores road surface and traffic；Construction node finally is sequentially passed through according to four shield machines of specific sequence of construction, completes tunnel
Construction.
Further, the excavation of foundation pit depth is determined by the Subway Tunnel for being located at lower part, foundation pit length and width by
The interactional distance of two Subway Tunnels determines；Foundation pit supporting construction form and excavation are determined according to the depth of foundation pit and range
Mode.
Further, the mode that shield machine passes through construction node includes two kinds: one is the shield machines of lower section two to initially pass through
Construction node, then two shield machines in top are then passed through construction node；Another kind is that two shield machines in top initially pass through construction section
Point, then two shield machines in lower section are then passed through construction node.
Further, two shield structures of the top and two shield machines of lower section pass through the process of construction node such as
Under:
Before passing through, arc concrete guide table of first constructing, the guide table cross sectional shape is matched with shield machine shell, the first shield
Before machine reaches, the preparatory coating lubricating oil rouge in guide table reduces the frictional force of the first shield machine；
After first shield machine passes through closing portal, the first shield chain-drive section is fallen in guide table, with normal driving
The rear segment assembly of first shield chain-drive section, withstanding on making every effort to promote on section of jurisdiction by the jack of the first shield machine head back makes
First shield machine is advanced forward；First cutter head of shield machine cannot be rotated in progradation, and when propulsion is withstood on using all jack
On the assembled good section of jurisdiction of one ring；As the forward impelling of the first shield machine fixes section of jurisdiction in time, to the gap between section of jurisdiction and guide table
It is filled；After first shield machine shifts the other end onto from one end of the node, shield hole is passed through, abolishes block wall using cutterhead
Afterwards, start normal rotary head driving, and segment assembly；Then the second shield machine is passed through according to the method that the first shield machine passes through
The node.
Further, in order to guarantee the stability of section of jurisdiction, on the outside of the section of jurisdiction with welding is utilized on its top plate and side wall
Gusseted fixes section of jurisdiction.
Further, for convenience of the dismounting of section of jurisdiction in future, below construction when subway tunnel, in the case where assembly is located at hoisting port just
When the section of jurisdiction of side, a piece of directly on top (horizontally disposed) section of jurisdiction is replaced using steel pipe；The path that section of jurisdiction after dismounting transports
For parallel shield direction；
Above construction when subway tunnel, a piece of side and the horizontal plane of being located at is replaced (to set hoisting port vertically using steel pipe
Set) a piece of section of jurisdiction, and the path that transports of section of jurisdiction after removing is vertical shield direction, then after turning round and transporting to material operating platform
It hangs out.
Further, it after two shield machines of below or above receive at next station, removes in transposition section
Section of jurisdiction and by the section of jurisdiction of dismounting remove；After section of jurisdiction has been removed, start to construct according to the requirement of Subway Tunnel in conjunction with guide table
Track interior structure.
Further, after being manually entered in tunnel, the screw between section of jurisdiction is removed since inside, removes head before following section of jurisdiction
The dregs on section of jurisdiction is first cleared up, then section of jurisdiction is removed, hung out one by one；For the section of jurisdiction being not located at immediately below hoisting port, can match
The section of jurisdiction of dismounting is transported to after hoisting port by conjunction mechanical equipment to be hung out again.
Further, if first constructing two shield machines in top, hoisting port is temporarily sealed at the top in lower section section first and is hung
Mouth is filled, material operating platform is provided, after shield machine passes through and removes section of jurisdiction when top two, upper interval can be sealed from side
It closes, and opens the hoisting port temporarily sealed, facilitate the section for lower part of constructing in the future.
Further, shield above not constructing in a short time can first close hoisting port, restore greening, to top in future
Iron is opened again when constructing.
Beneficial effects of the present invention are as follows:
1, the present invention, can be under advance reservation later period Subway Tunnel using open-cut foundation ditch construction subway midpoint crossing segment structure
Wear the condition of existing structure of the subway, it is ensured that later period Subway Tunnel does not influence built structure of the subway when constructing, it is ensured that structure of the subway peace
Entirely, while guaranteeing that the subway runed does not interrupt.
2, performing can backfill after finishing structure in time, restore the functions such as overhead surface traffic；Hoisting port is reserved in by road
In the greening on side, cover board can carried out when not in use and afforested, and can enabled at any time.
3, it can provide material such as jack, suspension hook etc. used when shield pushes through crossover node from hoisting port, and in node
It is interior that the channel and space of shield machine overhauling, tool changing are provided, it is ensured that shield machine is safe and smooth to pass through the crosspoint.
4, the concrete pipe sheet after the present invention removes can utilize again.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present application, and the application's shows
Meaning property embodiment and its explanation are not constituted an undue limitation on the present application for explaining the application.
Fig. 1 is the sectional view that node builds structure jointly；
Fig. 2 is the A-A section of structure, expression be top shield section cross-sectional view；
Fig. 3 is the B-B section of structure, expression be lower section shield section cross-sectional view；
Fig. 4 is the C-C section of structure, expression be lower section shield section shield block wall；
Fig. 5 is the D-D section of structure, expression be lower section shield interval structure side wall, reserved shield hole；
Fig. 6 is the E-E section of structure, expression be hoisting port section；
Fig. 7 is the F-F section of structure, and expression is the transport of materials mouth reserved at top structure side wall；
Fig. 8 is the G-G section of structure, expression be top shield center and rectangular structure relationship；
When Fig. 9 is construction lower section tunnel, the structure chart of top section of jurisdiction is replaced with steel pipe；
When Figure 10 is construction top tunnel, the structure chart of side section of jurisdiction is replaced with steel pipe；
In figure: 1 is hoisting port, and 2 be the shield machine of top, and 3 be the shield machine of lower section, and 4 be concrete guide table, and 5 be shield
Hole, 6 be the block wall on the outside of shield hole, the section of jurisdiction 7-1；The section of jurisdiction 7-2；8 be steel pipe.
Specific embodiment
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
Subway tunnel synchronized construction, which is overlapped, the invention discloses a kind of short distance reserves the method that shield sky pushes away condition construction,
When being particularly suitable for the subway sectional tunnel that two are closer and successively using shield-tunneling construction, avoid shield-tunneling construction to built neighbour
The influence of nearly structure；And the ground heavy traffic in crosspoint, construction period are higher, need to guarantee that the shield of construction in later period passes through the friendship
Ground traffic is not influenced when crunode.Specific installation method is as follows:
It is excavated firstly, two tableland iron midpoint crossing sections are placed in the same foundation pit, cutting depth is by being located at lower part
Subway Tunnel determine that foundation pit length and width are determined by the interactional distance of two Subway Tunnels, be typically approximately diamond shape
Or square.Foundation pit supporting construction form and digging mode are determined according to the depth of foundation pit and range.
Secondly, in the foundation pit of excavation, the structure for lower part Subway Tunnel of first constructing, then the knot for top Subway Tunnel of constructing
Then structure blocks, except hoisting port outer portion carries out earthing backfill on the outside of shield hole, restores road surface and traffic.
Then, construction node is successively passed through according to four shields of Specific construction sequence, shield machine passes through the side of construction node
Formula includes two kinds: one is the shield machines of lower section two to initially pass through construction node, and then two shield machines in top are then passed through construction section
Point；Another kind is that two shield machines in top initially pass through construction node, and then two shield machines in lower section are then passed through construction node.
The process that two shield machines of lower section pass through construction node is as follows:
Preceding arc concrete guide table 4 of first constructing is passed through, guide table cross sectional shape is matched with shield machine shell, and shield machine 2 reaches
Before, preparatory coating lubricating oil rouge, reduces the frictional force of shield machine in guide table.
After shield machine 3 below First passes through block wall 6, shield chain-drive section is fallen in concrete guide table 4, and just
The often the same rear segment assembly in shield chain-drive section of driving, the power on section of jurisdiction is withstood on by the jack of shield machine head back
Shield machine is promoted to advance forward.
With pushing ahead for the shield machine 3 below First, the seam below section of jurisdiction between concrete guide table 4 in time
The fixed section of jurisdiction of the fritter wedge shape lumps of wood is padded in gap, the gap between section of jurisdiction and concrete guide table is filled with fine sand.
For convenience of the dismounting of section of jurisdiction in future, it is necessary at the assembled section of jurisdiction being located at immediately below hoisting port 1, be replaced using steel pipe 8
A piece of directly on top section of jurisdiction (as shown in Figure 9)；The path that section of jurisdiction after dismounting transports is parallel shield direction.
Particularly, the operating space in 2 front of shield machine above when can make full use of the shield crossing node, organizes loom
Tool, electromechanics and electrical engineer carry out Shield-type machinery maintenance, maintenance, cutter changing, it is ensured that 2 runnability of shield machine of top is good
It is good, remaining engineering construction can be efficiently accomplished.
After shield machine 3 below First shifts the other end onto from one end of the node, start normal rotary head driving, and
Segment assembly.
The shield machine peace of another lower section passes through the node according to the method for front.
Start to remove the section of jurisdiction in the node after two shield machine perforation sections and after receiving, with cutter lacking section of jurisdiction
Mouth steel plate is cut off, the power between removal section of jurisdiction, while being provided space and being entered the good tunnel internal of pipe sheet assembling, will have been cut off with crane
Steel plate hung out from hoisting port 1.
After being manually entered in tunnel, section of jurisdiction is removed since inside, clears up the slag on section of jurisdiction first before removing following section of jurisdiction
Soil, then section of jurisdiction is removed one by one, is hung out.
For the section of jurisdiction being not located at immediately below hoisting port, the machines such as small-sized forklift or artificial jack (chain block) can be cooperated
The section of jurisdiction of dismounting is transported to after hoisting port and hangs out again by tool.
After section of jurisdiction has been removed, start in conjunction with concrete guide table internal according to the requirement construction track of Subway Tunnel etc.
Structure.
After the completion of rectangular structure, the position at the top of section seals hoisting port 1 from below, makes the bottom and top of hoisting port
The floor level in shield section is consistent, and top shield machine is facilitated to provide material transport platform when passing through.
Further, the step of when shield machine of the step of when the shield machine 2 of top passes through and lower section passes through be it is identical,
Unlike, for convenience of the dismounting of section of jurisdiction in future, replace being located at side and horizontal plane to the section of jurisdiction of hoisting port (such as Figure 10 institute with steel pipe
Show), it is convenient to carry out steel plate cutting and personnel's disengaging from material transport platform；The path that section of jurisdiction after dismounting transports is by parallel shield
Direction is changed to vertical direction, then turns round to transport to after material operates platform and hang out.
After the completion of all structure constructions, from top closed hoisting port 1, backfill restores greening.
Particularly, such as top shield of not constructing in a short time, hoisting port 1 can be first closed, greening is restored, to top in future ground
Iron is opened again when constructing.
Particularly, if first construct two top shield machine 2, can first by hoisting port the top in lower section section position
Hoisting port 1 temporarily is sealed, providing material operating platform can be by top after shield machine 2 passes through and removes section of jurisdiction when top two
The hoisting port temporarily sealed is opened from side-closed in section, facilitates the section for lower part of constructing in the future.
The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for the skill of this field
For art personnel, various changes and changes are possible in this application.Within the spirit and principles of this application, made any to repair
Change, equivalent replacement, improvement etc., should be included within the scope of protection of this application.
Claims (8)
- Condition construction method is pushed away 1. closely overlapping subway tunnel synchronized construction and reserving shield sky, which is characterized in that by two tablelands Iron midpoint crossing section, which is placed in the same foundation pit, to be excavated；In the foundation pit of excavation, the structure for lower part Subway Tunnel of first constructing, It constructs the structure of top Subway Tunnel, is then blocked on the outside of shield hole again, rest part carries out earthing and returns in addition to hoisting port It fills out, restores road surface and traffic；Construction node finally is sequentially passed through according to four shield machines of specific sequence of construction, completes tunnel Construction；The mode that shield machine passes through construction node includes two kinds: one is the shield machines of lower section two to initially pass through construction node, then The shield machine of top two is then passed through construction node；Another kind is that two shield machines in top initially pass through construction node, then lower section two Platform shield machine is then passed through construction node；Two shield structures of the top and two shield machines of lower section pass through the mistake of construction node Journey is as follows: before passing through, arc concrete guide table of first constructing, the guide table cross sectional shape is matched with shield machine shell, the first shield Before machine reaches, the preparatory coating lubricating oil rouge in guide table reduces the frictional force of the first shield machine；First shield machine passes through closing hole After door, the first shield chain-drive section is fallen in guide table, with normal driving the first shield chain-drive section rear segment assembly, Withstanding on making every effort to promote on section of jurisdiction by the jack of the first shield machine head back makes the first shield machine advance forward；First shield machine Cutterhead cannot be rotated in progradation, be withstood on the assembled good section of jurisdiction of a ring when propulsion using all jack；With the first shield The forward impelling of structure machine fixes section of jurisdiction in time, is filled to the gap between section of jurisdiction and guide table；First shield machine is from the node After one end shifts the other end onto, shield hole is passed through, after abolishing block wall using cutterhead, starts normal rotary head driving, and assembled Section of jurisdiction；Then the second shield machine passes through the node according to the method that the first shield machine passes through.
- 2. the subway tunnel synchronized construction reserved shield sky as described in claim 1 that closely overlaps pushes away condition construction method, It is characterized in that, the excavation of foundation pit depth determines that foundation pit length and width are by two tableland iron by the Subway Tunnel for being located at lower part The interactional distance in section determines；Foundation pit supporting construction form and digging mode are determined according to the depth of foundation pit and range.
- 3. the subway tunnel synchronized construction reserved shield sky as described in claim 1 that closely overlaps pushes away condition construction method, Be characterized in that, in order to guarantee the stability of section of jurisdiction, on the outside of the section of jurisdiction on its top plate and side wall using welding gusseted Fixed section of jurisdiction.
- 4. the subway tunnel synchronized construction reserved shield sky as described in claim 1 that closely overlaps pushes away condition construction method, It is characterized in that, below construction when subway tunnel, at the assembled section of jurisdiction being located at immediately below hoisting port, is replaced using steel pipe a piece of Directly on top concrete pipe sheet；The path that section of jurisdiction after dismounting transports is parallel shield direction；The subway tunnel above construction When road, replaced using steel pipe a piece of positioned at side and horizontal plane is to a piece of section of jurisdiction of hoisting port, and section of jurisdiction after removing transports Path is vertical shield direction, then turns round to transport to after material operates platform and hang out.
- 5. the subway tunnel synchronized construction reserved shield sky as described in claim 1 that closely overlaps pushes away condition construction method, It is characterized in that, after two shield machines of below or above receive at next station, removes the section of jurisdiction in transposition section and incite somebody to action The section of jurisdiction of dismounting removes；After section of jurisdiction has been removed, start track interior of constructing according to the requirement of Subway Tunnel in conjunction with guide table Structure.
- 6. the subway tunnel synchronized construction reserved shield sky as described in claim 1 that closely overlaps pushes away condition construction method, It is characterized in that, after being manually entered in tunnel, the screw between section of jurisdiction is removed since inside, and cleaning first is managed before removing following section of jurisdiction The dregs of on piece, then section of jurisdiction is removed, is hung out one by one；For the section of jurisdiction being not located at immediately below hoisting port, cooperative mechanical equipment The section of jurisdiction of dismounting is transported to after hoisting port and is hung out again.
- 7. the subway tunnel synchronized construction reserved shield sky as described in claim 1 that closely overlaps pushes away condition construction method, It is characterized in that, if first two shield machines in construction top, first temporarily seal hoisting port at the top in lower section section for hoisting port, provide Material operates platform, after shield machine passes through and removes section of jurisdiction when top two, by upper interval from side-closed, and opens and faces When the hoisting port that seals, facilitate the section for lower part of constructing in the future.
- 8. the subway tunnel synchronized construction reserved shield sky as described in claim 1 that closely overlaps pushes away condition construction method, It is characterized in that, top shield of not constructing in a short time first closes hoisting port, restores greening, when top subway work in future again It opens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810140707.0A CN108240226B (en) | 2018-02-11 | 2018-02-11 | It closely overlaps the reserved shield sky of subway tunnel synchronized construction and pushes away condition construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810140707.0A CN108240226B (en) | 2018-02-11 | 2018-02-11 | It closely overlaps the reserved shield sky of subway tunnel synchronized construction and pushes away condition construction method |
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| Publication Number | Publication Date |
|---|---|
| CN108240226A CN108240226A (en) | 2018-07-03 |
| CN108240226B true CN108240226B (en) | 2019-08-13 |
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| CN201810140707.0A Active CN108240226B (en) | 2018-02-11 | 2018-02-11 | It closely overlaps the reserved shield sky of subway tunnel synchronized construction and pushes away condition construction method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109695456A (en) * | 2019-01-22 | 2019-04-30 | 济南轨道交通集团有限公司 | A kind of rail traffic and pipe gallery build structure and its construction method jointly |
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| CN103032072A (en) * | 2012-12-08 | 2013-04-10 | 中铁十二局集团第二工程有限公司 | Method for disassembling, lifting and transferring closed type station shield to transferring line to be hoisted out |
| CN106223969A (en) * | 2016-08-30 | 2016-12-14 | 中铁隧道勘测设计院有限公司 | One closely upper and lower overlap or shield tunnel construction method of closely intersecting |
| CN106401592A (en) * | 2016-06-17 | 2017-02-15 | 中铁十八局集团第五工程有限公司 | Construction method for tunnel boring off-contact sending and receiving platform of up-down overlapped tunnel |
| CN106499399A (en) * | 2016-12-30 | 2017-03-15 | 中铁二局集团有限公司 | A kind of Shield Construction Method Used method of overlapping tunnel in rich water powder land floor |
| CN108590679A (en) * | 2018-04-18 | 2018-09-28 | 重庆建工第七建筑工程有限责任公司 | Utilize the construction method for walking support truck jumbo overlapping tunnel |
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2018
- 2018-02-11 CN CN201810140707.0A patent/CN108240226B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103032072A (en) * | 2012-12-08 | 2013-04-10 | 中铁十二局集团第二工程有限公司 | Method for disassembling, lifting and transferring closed type station shield to transferring line to be hoisted out |
| CN106401592A (en) * | 2016-06-17 | 2017-02-15 | 中铁十八局集团第五工程有限公司 | Construction method for tunnel boring off-contact sending and receiving platform of up-down overlapped tunnel |
| CN106223969A (en) * | 2016-08-30 | 2016-12-14 | 中铁隧道勘测设计院有限公司 | One closely upper and lower overlap or shield tunnel construction method of closely intersecting |
| CN106499399A (en) * | 2016-12-30 | 2017-03-15 | 中铁二局集团有限公司 | A kind of Shield Construction Method Used method of overlapping tunnel in rich water powder land floor |
| CN108590679A (en) * | 2018-04-18 | 2018-09-28 | 重庆建工第七建筑工程有限责任公司 | Utilize the construction method for walking support truck jumbo overlapping tunnel |
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