CN106988748A - High-order parallel heading construction and the construction method that capacity expansion revamping is double line tunnel - Google Patents
High-order parallel heading construction and the construction method that capacity expansion revamping is double line tunnel Download PDFInfo
- Publication number
- CN106988748A CN106988748A CN201710153954.XA CN201710153954A CN106988748A CN 106988748 A CN106988748 A CN 106988748A CN 201710153954 A CN201710153954 A CN 201710153954A CN 106988748 A CN106988748 A CN 106988748A
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- Prior art keywords
- tunnel
- parallel heading
- double line
- construction
- later stage
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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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
Abstract
High-order parallel heading construction and the construction method that capacity expansion revamping is double line tunnel, produce substantial amounts of abandoned project to be prevented effectively from capacity expansion revamping construction, farthest reduce construction safety risk, and construction investment is greatly reduced.High-order parallel heading construction includes being located at the parallel heading on the left of existing tunnel or at 30~50m of right side, the center line of the parallel heading coincides with later stage double line tunnel center line, Qi Keng bottom surfaces are located in later stage double line tunnel more than rail top surface, and its section Internal periphery shape is adapted with later stage double line tunnel top section.The parallel heading arch wall scope uses bolt-spary supports structure, is used as the permanent support system of later stage double line tunnel top arch wall scope.The parallel heading bottom surface sets form concrete bottom plate, and hole bottom gutter is arranged at parallel heading side.
Description
Technical field
The present invention relates to Tunnel Engineering, more particularly to a kind of high-order parallel heading construction and capacity expansion revamping are double line tunnel
Construction method.
Background technology
With the great-leap-forward development of China's communication, the traffic network such as railway, highway is when passing through landform difficulty mountain area
Substantial amounts of super long tunnel can be emerged in large numbers, tunnel is longer, the geologic element that it passes through is more complicated, then difficulty of construction is also bigger.To solve
The super long tunnel completion time of project, take into account in-cavity construction ventilation, draining, abandon quarrel, operation ventilation and take precautions against natural calamities evacuation etc. require, in combination
Shape, geological conditions, and the need for the later stage expands and can increase and build Double line project, super long tunnel suitably set parallel heading as aiding in hole
Road, parallel heading is normally on the left of I threaded lists road or at 30~50m of right side, and Qi Keng bottom surfaces are mostly less than rail top surface 1.2 in tunnel
~2.0m, in favor of water outlet in white-out tunnel.After tunnel I line completion of works, using existing parallel heading, enlarging is multiple in good time
Line or II threaded lists road.
Parallel heading cross-section is arranged according to means of transportation, the appearance and size of current equipment, people's row safe distance, pipeline
And the factor such as gutter arrangement determines that flexible transport bicycle road parallel heading section headroom size is generally 5.0m (width) × 6.0m
(height), flexible transport two-way traffic parallel heading section headroom size is generally 7.5m (width) × 6.2m (height).Parallel heading is used
Based on shotcrete lining cutting, weak surrounding rock and underground water development section can set up set lining on the inside of the hole of shotcrete lining cutting, Portal Section and pass through
The bad geological section such as fault belt use moulded lining.Because parallel heading is deposited with the tunnel cross-section Internal periphery after need to extending
In larger difference, conventional way is the concrete lining structure and bolt-spary supports for first removing existing parallel heading, and using both
There is parallel heading to caunch upwards, abutment wall is digged and downward bottomed excavation, uses drilling and blasting method enlarging construction for the lining section in tunnel
Profile, and apply preliminary bracing, waterproof layer and secondary lining.Existing enlargement method has the following disadvantages：Super long tunnel geology
Complicated condition, the joint density area extremely developed in weak surrounding rock, crack, rich water karst stratum, fault belt etc. are poorly
Quality section, the moulded lining or bolt-spary supports for removing existing parallel heading easily triggers the considerable safety thing such as landslide or gushing water, prominent mud
Therefore, the safety of operating personnel and construction equipment is seriously endangered, there is high construction safety risk；Lining concrete after dismounting
As quarrel processing is abandoned, reinforcing bar and steelframe are difficult to be utilized again in engineering, there is serious abandoned project, economy is very
Difference.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of high-order parallel heading construction, to be prevented effectively from capacity expansion revamping
Construction produces substantial amounts of abandoned project, farthest reduces construction safety risk, and construction investment is greatly reduced.
The technical solution adopted for the present invention to solve the technical problems is as follows：
The high-order parallel heading construction of the present invention, including the parallel conductive on the left of existing tunnel or at 30~50m of right side
Hole, it is characterized in that：The center line of the parallel heading coincides with later stage double line tunnel center line, and Qi Keng bottom surfaces are located at later stage multiple line tunnel
In road more than rail top surface, its section Internal periphery shape is adapted with later stage double line tunnel top section；The parallel heading arch wall
Scope uses bolt-spary supports structure, is used as the permanent support system of later stage double line tunnel top arch wall scope；The parallel heading
Bottom surface sets form concrete bottom plate, and hole bottom gutter is arranged at parallel heading side.
Another technical problem to be solved by this invention is to provide a kind of above-mentioned high-order parallel heading construction capacity expansion revamping
The construction method of double line tunnel, this method comprises the following steps：1. it is multiple by the use of the bolt-spary supports structure of parallel heading as the later stage
The permanent preliminary bracing system in threaded list road, locally occurs in place of peeling off using spray before bottomed excavation to bolt-spary supports body structure surface
Penetrate concrete to fill spray smooth-going, and cheated in parallel heading and row's grouting anchor pile is arranged symmetrically at bottom and arch springing carries out local grouting and reinforcing
Country rock；2. later stage tunnel bottom is bottomed excavates, and is constructed, is first excavated away from the side lower part of existing tunnel one using left side, right side framing
Rock mass, applies abutment wall preliminary bracing structure under the new excavation face in the side, inverted arch preliminary bracing structure and lock pin system in time；It is delayed
3~5m excavates another side lower part rock mass again, and abutment wall preliminary bracing structure under the new excavation face in the side, inverted arch branch at initial stage are applied in time
Protection structure and lock pin system and device；3. short abutment wall, inverted arch and inverted arch packed layer are poured successively, lay waterproof layer, and apply in time
Arch wall secondary lining.
The beneficial effects of the invention are as follows the high-order parallel heading implemented in advance is set in line with the principle for facing combination forever, after pressing
Phase needs the profiled outline for the double line tunnel top preliminary bracing that capacity expansion revamping is to draft, and by later stage Tunnel Internal periphery
Vault absolute altitude determine the elevation of high-order parallel heading, the bolt-spary supports of parallel heading arch wall scope is used as the permanent of later stage tunnel
Supporting, capacity expansion revamping construction only the bottomed excavation of branch, branch need to apply the new excavation face in bottom on the basis of high-order parallel heading
Supporting；Thoroughly evade the high security risk that the arch wall supporting for removing existing parallel heading and ripping construction are brought, and
Avoid capacity expansion revamping construction from producing substantial amounts of abandoned project, can significantly save construction cost；Construction method security risk is low, can be real
Shi Xingqiang, process are simple, operating efficiency is high, short time limit, and construction investment can be greatly reduced.
Brief description of the drawings
This specification includes following four width accompanying drawing：
Fig. 1 is the sectional drawing of high-order parallel heading construction of the invention；
Fig. 2 is that high-order parallel heading construction capacity expansion revamping of the invention is supporting reinforcing section before the construction of double line tunnel
Schematic diagram；
Fig. 3 is that high-order parallel heading construction capacity expansion revamping of the invention excavates for base tunnel in the construction method of double line tunnel is bottomed
And preliminary bracing applies process profile diagram；
Fig. 4 is that high-order parallel heading construction capacity expansion revamping of the invention is Tunnel Second Lining in the construction method of double line tunnel
Apply process sectional schematic diagram；
Component and corresponding mark are shown in figure：Rail top surface A in later stage double line tunnel, parallel heading center line B, double line tunnel
Center line C, later stage double line tunnel bottom excavation contour line D, parallel heading 10, bolt-spary supports liner structure 11, steelframe 11a, system
Anchor pole 11b, shotcrete layer 11c, form concrete bottom plate 12, at the beginning of cheating bottom gutter 13, grouting anchor pile 14, lower-left side wall
Phase supporting construction 21, inverted arch preliminary bracing structure 22, bottom right side wall preliminary bracing structure 23, lock pin system and device 25, short side
Wall 31, inverted arch 32, waterproof layer 33, arch wall secondary lining 34, inverted arch packed layer 35.
Embodiment
The present invention is further described with reference to the accompanying drawings and examples.
Reference picture 1, high-order parallel heading construction of the invention, including on the left of existing tunnel or at 30~50m of right side
Parallel heading 10.The present invention is broken the normal procedure, and parallel heading 10 is set by the theory for facing combination forever, in the parallel heading 10
Line B coincides with later stage double line tunnel center line C, and its polycrystalline substance is located in later stage double line tunnel on rail top surface A, in its section
Contour shape is adapted with later stage double line tunnel top section.I.e. the headroom of parallel heading 10 except meet construction period haulage vehicle,
Personnel are current and pipeline, the laying in gutter require outer, and parallel heading 10 presses the preliminary bracing lubrication groove of double line tunnel top section
The Clearance requirement that exterior feature is set and reserved Support Deformation amount, secondary lining are applied.The absolute altitude of parallel heading 10 break by its cheat bottom with
Rail top surface or road bed determine the routine of elevation relation in tunnel, and as at the beginning of the supporting construction vault of parallel heading 10 and double line tunnel
Phase supporting vault is concordant etc., and a height of principle is determined, it is to avoid later stage increasing builds double line tunnel to parallel heading ripping construction.
Referring to Figures 1 and 2, the arch wall scope of parallel heading 10 uses bolt-spary supports structure 11, is used as later stage multiple line tunnel
The permanent support system of road top arch wall scope.The bottom surface of parallel heading 10 sets form concrete bottom plate 12, mainly as
Parallel heading construction period haulage vehicle and the passage of personnel's turnover are used, and thickness is generally 20cm.Hole bottom gutter 13 is set
In the side of parallel heading 10, can combine I threaded lists road construction drainage needs corresponding deepen.The bolt-spary supports structure 11 is mixed by injection
Solidifying soil layer 11c, bar-mat reinforcement, steelframe 11a and system anchor bolt 11b are constituted, and shotcrete layer 11c is attached on country rock, bar-mat reinforcement
It is embedded in steelframe frame 11a in shotcrete layer 11c, system anchor bolt 11b is laid along country rock in blossom type, its outer end and steelframe
11a anchor connections.
The high-order parallel heading construction of the present invention is set in line with the principle for facing combination forever, and answering after capacity expansion revamping is needed by the later stage
The profiled outline of threaded list road top preliminary bracing is drafted, and determines a high position by the vault absolute altitude of later stage Tunnel Internal periphery
The elevation of parallel heading, the bolt-spary supports structure 11 of the arch wall scope of parallel heading 10 expands energy as the permanent support in later stage tunnel
Rebuilding construction only need on the basis of high-order parallel heading branch it is bottomed excavate, branch applies the supporting of the new excavation face in bottom.It is thorough
The high security risk that the arch wall supporting for removing existing parallel heading and the Enlargement excavation that caunches are brought is evaded at bottom, and avoids expanding
Energy rebuilding construction produces substantial amounts of abandoned project, can significantly save construction cost.
Reference picture 2, Fig. 3 and Fig. 4, the high-order parallel heading capacity expansion revamping are the construction method of double line tunnel, including such as
Lower step：
1. by the use of parallel heading 10 bolt-spary supports structure 11 as later stage double line tunnel permanent preliminary bracing system,
Locally occur peeling off part to the surface of bolt-spary supports structure 11 before bottomed excavation and filled spray smooth-going using gunite concrete, and in parallel
Row's grouting anchor pile 14 is arranged symmetrically at the hole bottom of base tunnel 10 and arch springing and carries out local grouting reinforcement rock, when being excavated to prevent falling stop bottom
Existing bolt-spary supports structure 11 is caused sedimentation displacement occur.Grouting anchor pile 14 is laid by drilling, can be with reference between steelframe 11a longitudinal directions
Away from setting；
2. later stage tunnel bottom is bottomed excavates, and is constructed, is first excavated away under existing tunnel side using left side, right side framing
Portion's rock mass, applies abutment wall preliminary bracing structure under the new excavation face in the side, inverted arch preliminary bracing structure and lock pin system dress in time
Put 25；Delayed 3~5m excavates another side lower part rock mass again, apply in time abutment wall preliminary bracing structure under the new excavation face in the side,
Inverted arch preliminary bracing structure and lock pin system and device 25；
3. short abutment wall (31), inverted arch 32 and inverted arch packed layer 35 are poured successively, are laid waterproof layer 33, arch wall are applied in time secondary
Lining cutting 34.
The step 2. after the completion of, lower left side abutment wall preliminary bracing structure 21 that tunnel both sides are newly implemented, right side abutment wall
Preliminary bracing structure 23 is well connected with top bolt-spary supports structure 11, and is closed into time with inverted arch preliminary bracing structure 22
Ring, is collectively forming the carrying support system of later stage double line tunnel.
Construction method security risk of the invention is low, exploitativeness is strong, process is simple, operating efficiency is high, short time limit, and can
Construction investment is greatly reduced.
Claims (4)
1. high-order parallel heading construction, including the parallel heading (10) on the left of existing tunnel or at 30~50m of right side, it is special
Levying is：The center line (B) of the parallel heading (10) coincides with later stage double line tunnel center line (C), and it is cheated bottom structure and is located at the later stage
In double line tunnel more than rail top surface (A), its section Internal periphery shape is adapted with later stage double line tunnel top section；It is described parallel
Base tunnel (10) arch wall scope uses bolt-spary supports structure (11), is used as the permanent support body of later stage double line tunnel top arch wall scope
System；Parallel heading (10) bottom surface sets form concrete bottom plate (12), and hole bottom gutter (13) is arranged at parallel heading
(10) side.
2. high position parallel heading as claimed in claim 1, it is characterized in that：The bolt-spary supports structure (11) is by shotcrete layer
(11c), bar-mat reinforcement, steelframe (11a) and system anchor bolt (11b) are constituted, and shotcrete layer (11c) is attached on country rock, reinforcing bar
Net and steelframe (11a) are embedded in shotcrete layer (11c), and system anchor bolt (11b) is laid along country rock in blossom type, its outer end
With steelframe steelframe (11a) anchor connection.
3. high position parallel heading capacity expansion revamping is the construction method of double line tunnel as claimed in claim 1, comprise the following steps：
1. by the use of parallel heading (10) bolt-spary supports structure (11) as later stage double line tunnel permanent preliminary bracing system,
Locally occur peeling off part to bolt-spary supports structure (11) surface before bottomed excavation and filled spray smooth-going using gunite concrete, and in putting down
Row base tunnel (10), which is cheated, is arranged symmetrically the local grouting reinforcement rock of row's grouting anchor pile (14) progress at bottom and arch springing；
2. later stage tunnel bottom is bottomed excavates, and is constructed, is first excavated away from the side lower part rock of existing tunnel one using left side, right side framing
Body, applies abutment wall preliminary bracing structure under the new excavation face in the side, inverted arch preliminary bracing structure and lock pin system and device in time
(25)；Delayed 3~5m excavates another side lower part rock mass again, apply in time abutment wall preliminary bracing structure under the new excavation face in the side,
Inverted arch preliminary bracing structure and lock pin system and device (25)；
3. short abutment wall (31), inverted arch (32) and inverted arch packed layer (35) are poured successively, and laying waterproof layer (33) applies arch wall two in time
Secondary lining cutting (34).
4. high position parallel heading capacity expansion revamping is the construction method of double line tunnel as claimed in claim 3, it is characterized in that：The step
Suddenly 2. after the completion of, lower left side abutment wall preliminary bracing structure (21) that tunnel both sides are newly implemented, right side abutment wall preliminary bracing structure
(23) well it is connected with top bolt-spary supports structure (11), and closing is cyclic in time with inverted arch preliminary bracing structure 22, common shape
Into the carrying support system of later stage double line tunnel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710153954.XA CN106988748B (en) | 2017-03-15 | 2017-03-15 | High-order parallel heading construction and capacity expansion revamping are the construction method of double line tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710153954.XA CN106988748B (en) | 2017-03-15 | 2017-03-15 | High-order parallel heading construction and capacity expansion revamping are the construction method of double line tunnel |
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| Publication Number | Publication Date |
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| CN106988748A true CN106988748A (en) | 2017-07-28 |
| CN106988748B CN106988748B (en) | 2019-10-29 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109403986A (en) * | 2017-08-16 | 2019-03-01 | 中铁二院工程集团有限责任公司 | The synchronous enlarging of the parallel heading of TBM tunneling construction is the construction method of double line tunnel |
| CN110566240A (en) * | 2019-08-26 | 2019-12-13 | 中铁四局集团第五工程有限公司 | Construction method suitable for protecting existing tunnel in close-proximity expanded excavation tunnel construction |
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| CN110566240A (en) * | 2019-08-26 | 2019-12-13 | 中铁四局集团第五工程有限公司 | Construction method suitable for protecting existing tunnel in close-proximity expanded excavation tunnel construction |
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| Publication number | Publication date |
|---|---|
| CN106988748B (en) | 2019-10-29 |
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