CN107503360A - A kind of huge loose talus tunnel entrance surcharge reaction ruggedized construction - Google Patents
A kind of huge loose talus tunnel entrance surcharge reaction ruggedized construction Download PDFInfo
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- CN107503360A CN107503360A CN201710595018.4A CN201710595018A CN107503360A CN 107503360 A CN107503360 A CN 107503360A CN 201710595018 A CN201710595018 A CN 201710595018A CN 107503360 A CN107503360 A CN 107503360A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
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Abstract
A kind of huge loose talus tunnel entrance surcharge reaction ruggedized construction, is vertically provided with multistage stepped secondary levee, multistage secondary levee is filled using block stone soil filler at protection elevation；The platform of multistage secondary levee is protected with Caused by Sloping Surfaces using double-deck dry-laid rubble, and blotter is arranged below in double-deck dry-laid rubble protection；Concrete guard wall is provided with toe；Upstream side bank protection connects domatic using upstream side cone with secondary levee multi-stage platform, and upstream pleurocentrum is domatic to be protected using mortar rubble masonry pavement, and bank protection has a blotter, and basis is using C35 concrete spoon type basis；Downstream bank protection connects domatic using downstream pleurocentrum with secondary levee multi-stage platform, and downstream cone is domatic to use double-deck dry-laid rubble slope protection prevention, and bank protection has a blotter, and basis uses concrete strip foundation；Agent on crack resistance of concrete sliding pile is provided with two level, the big mileage side of Three-level Platform, stake top sets binder.This structural shielding intensity is big, and protective range and protection effect are comprehensive, avoids talus location from caving in, so as to ensure the security of circuit operation.
Description
Technical field
The present invention relates to tunnel field, more particularly to a kind of huge loose talus tunnel entrance surcharge reaction ruggedized construction.
Background technology
The scale of great Qian Shi ridges tunnel entrance talus is very big, and talus scope includes the almost whole massif of tunnel entrance,
26 °~38 ° of natural grade, talus thickness are 26.3~48.4 meters, and body extends to korneforos near the mountain for Study on Rock bottom.Talus mainly by
Block stone composition not of uniform size, rock matter are early Sinian system fishing platform group (Z1d) quartzy sandstone, and block stone diameter is more in 0.5m~1.5m
Between, big 2~3m of person, block footpath is overall more homogeneous, and in loose aerial construction, basic non-binding, no shiver stone and fine grained soil fill
Fill out, assortment, the voidage of talus reaches 40%-50%.Great Qian Shi ridges tunnel passes through from huge talus middle and upper part, tunnel top rock
50 meters of heap maximum gauge, tunnel bottom is from talus base rock height up to more than 32 meters.
There is reservoir planning in local government simultaneously in the segment limit, and after reservoir filling, different journeys can be produced to side bank around
Degree influences, especially talus location, is most also easy to produce reservoir bank caving problem, and then has influence on the operation security of circuit, therefore, in iron
While the engineering construction of road, the scope that may influence line security is needed to take sloughing bank safeguard procedures.
The content of the invention
To there is provided a kind of protection intensity big to solve technical problem present in known technology by the present invention, protective range and prevents
It is comprehensive to protect effect, avoids talus location from caving in, so as to ensure that the huge loose talus tunnel of the security of circuit operation enters
Mouth surcharge reaction ruggedized construction.
The present invention is adopted the technical scheme that to solve technical problem present in known technology：
A kind of huge loose talus tunnel entrance surcharge reaction ruggedized construction, it is characterised in that：
Multistage stepped secondary levee is vertically provided with protection elevation, multistage secondary levee is filled using block stone soil filler；It is more
The platform of level secondary levee is protected with Caused by Sloping Surfaces using double-deck dry-laid rubble, and rubble pad is provided below in double-deck dry-laid rubble protection
Layer；Concrete guard wall is provided with toe；
Upstream side bank protection connect with secondary levee multi-stage platform it is domatic using cone, the centrum it is domatic for upstream pleurocentrum it is domatic,
Upstream pleurocentrum is domatic to be protected using mortar rubble masonry pavement, and bank protection has blotter, and basis uses C35 concrete spoon type bases
Plinth；
Downstream bank protection connect with secondary levee multi-stage platform it is domatic using centrum, the centrum it is domatic for downstream pleurocentrum it is domatic,
Downstream cone is domatic to use double-deck dry-laid rubble slope protection prevention, and bank protection has blotter, and basis uses concrete stripe shape
Basis；
Two level, the big mileage side of Three-level Platform are provided with agent on crack resistance of concrete sliding pile, often locates more, is set by spacing, stake top is set
Put binder.
Further：Stepped secondary levee is three-level, and the double-deck dry-laid rubble that the platform of three-level secondary levee is used with Caused by Sloping Surfaces is prevented
Every thickness degree of shield is 0.3m, and the blotter thickness that double-deck dry-laid rubble protection is provided below is 0.15m；Set at toe
The a height of 4m of wall of concrete guard wall.
Further：The domatic ratio of slope of upstream side cone not steep 1:2.0, the centrum is domatic to use M7.5 mortar rubble masonry pavements
Protection, bank protection thickness is 0.6m, and the thickness of the blotter set under bank protection is 0.15m.
Further：The domatic ratio of slope of downstream cone not steep 1:2.0, the double-deck dry-laid rubble of the domatic use of downstream cone
Every layer of bank protection thickness of slope protection prevention is 0.3m, and the thickness of the blotter set under bank protection is 0.15m.
Further：Agent on crack resistance of concrete sliding pile uses a diameter of 2.0m C45 agent on crack resistance of concrete sliding piles, often locates 5 below original ground
Root, stake spacing 2.2m；More than ground often locate 3, stake spacing 4.4m.
Further：From not easy-weathering in block stone soil filler, the stone based on cusped edge shape, packing material size is more than 200mm
The quality of particle exceedes the 50% of gross mass, and the maximum particle diameter of filler is less than the 2/3 of 300mm or paving thickness；The compacting of filler
Standard is not less than 130MPa/m using coefficient of subgrade reaction as Con trolling index, coefficient of subgrade reaction K/30.
The present invention has the advantages and positive effects of：
1st, the present invention uses extensive block stone soil back-pressure grinding compacting, compared with concrete or other protective equipment durability more
Good, protection intensity is bigger, and protective range and protection effect are more comprehensively.
2nd, for the present invention compared to existing more difficult safeguard procedures or protectiving scheme, construction technology is fairly simple, and work efficiency is high,
Construction equipment configuration requirement is low, and construction quality is easily controlled, and construction safety risk is small, and total construction management cost is relatively low.
3rd, the present invention can make full use of tunnel muck, have the good feature of environmental protection, can meet local government's high requirement
Environmental protection policy.
4th, for the present invention after railway puts into effect from now on, maintenance is less, and maintenance risk is also smaller, manages into
This is lower.
5th, the present invention is multi-faceted than choosing from technology, economy, safe and environment-friendly etc., belongs to mutual exclusion type scheme, effect is more excellent.
Brief description of the drawings
Fig. 1 is that talus of the present invention reinforces floor map；
Fig. 2 is that talus of the present invention reinforces diagrammatic cross-section；
Fig. 3 is friction pile arrangement schematic diagram of the present invention；
Fig. 4 is spoon shape basic schematic of the present invention；
Fig. 5 is strip footing schematic diagram of the present invention；
Fig. 6 is concrete retaining wall schematic diagram of the present invention.
In figure：1st, one-level platform；2nd, two level platform；3rd, Three-level Platform；4th, one-level is domatic；5th, two level is domatic；6th, three-level slope
Face；7th, concrete guard wall；7-1, spilled water hole；8th, upstream pleurocentrum is domatic；9th, C35 concrete spoon type basis；10th, downstream pleurocentrum
It is domatic；11st, C35 concrete strip foundation；12nd, friction pile；13rd, binder.
Embodiment
In order to further understand the content, features and effects of the present invention, following examples are hereby enumerated, and with reference to accompanying drawing
Describe in detail as follows：
Such as Fig. 1 and 2, slope protection width is 165m (being free of quadrant revetment), i.e.,：33# piers to 37# platforms section sets secondary levee pair
Existing talus is reinforced, elevation of top surface 431.1m.
Down-set stepped secondary levee at elevation is protected, is the stepped secondary levee of three-level in accompanying drawing, but is not limited to three-level, to both
There is talus to be reinforced, secondary levee is filled using block stone soil filler, and secondary levee platform is prevented with Caused by Sloping Surfaces using double-deck dry-laid rubble bank protection
Shield, every layer of bank protection thickness is more preferably 0.3m, and blotter, rubble pad is provided below in double-deck dry-laid rubble slope protection prevention
The thickness of layer further preferably takes 0.15m.For the stepped secondary levee of above-mentioned three-level, secondary levee platform big-endian is successively
For one-level platform 1, two level platform 2 and Three-level Platform 3, the Three-level Platform is respectively that one-level is domatic 4, two level domatic 5 with Caused by Sloping Surfaces
With three-level domatic 6.Concrete guard wall 7 is provided with toe.
The soil filler selection of block stone and the following requirement of the preferred satisfaction of compacting criteria：
1. preferably selecting not easy-weathering in block stone soil filler, the stone based on cusped edge shape, packing material size is more than 200mm particles
Quality exceedes the 50% of gross mass.
2. the maximum particle diameter of filler is not preferably greater than the 2/3 of 300mm or paving thickness.
3. elevation, which is less than filler in the range of 425.5m side slope outermosts 5m, chooses large particle size filler, and fills neat.
4. the compacting criteria of filler is not less than 130MPa/m using coefficient of subgrade reaction as Con trolling index, coefficient of subgrade reaction K/30.
Such as Fig. 2 and 6, concrete guard wall is more preferably the high C35 concrete guard walls of 4m.The high 4m of retaining walls, wall height exist
Marked in accompanying drawing with H.Top width 1.8m, wall chest, back slope are 1:0.25.Along wall length one of expansion joint, slit width are set every 10~20m
0.02m, seam interior edge is inside and outside, three sides of top filling pitch hemp cut, deep 0.2m.Wall body bassets part, away from setting one at wall top 1m
Water hole 7-1, spacing 3.0m are drained, spilled water hole is managed using φ 10cmPVC.Foundation ditch is backfilling and compacted with original soil before wall, after wall foundation ditch with
Original soil backfills, and compacting criteria should meet Evd >=30Mpa.Barricade substrate is horizontal, and substrate buried depth is deep not less than general scour line
1m below degree, is placed in good ground.
Such as Fig. 1, domatic using cone when upstream side bank protection connects with secondary levee Three-level Platform, the domatic centrum is upstream side vertebra
Body domatic 8, ratio of slope is not further preferably suddenly in 1:2.0, cone is domatic to be entered using the protection of M7.5 mortar rubble masonry pavements, bank protection thickness
One step is preferably 0.6m, and it divides into blotter, and blotter thickness is more preferably 0.15m.Bank protection is every along line direction
Expansion joint is set every 15~20m together, slit width 0.02m, stitches interior filling pitch hemp cut (or pitch plank), deep 0.2m.Bank protection is domatic
It is staggered spilled water hole every 2~3m upper and lower, left and right, spilled water hole uses pvc pipe, caliber 0.1m, the gradient 4%, pvc pipe
Influent side is wrapped up using permeable geotextiles.Basis uses C35 concrete spoon types basis 9, as shown in figs. 1 and 4.
Such as Fig. 1, downstream bank protection connects domatic using centrum with secondary levee multi-stage platform, and the domatic centrum is downstream pleurocentrum
Domatic 10, downstream cone is domatic to use double-deck dry-laid rubble slope protection prevention, and every layer of bank protection thickness is more preferably 0.3m, cone
The domatic ratio of slope of body is not more preferably suddenly in 1:2.0.Bank protection has blotter, and blotter thickness is more preferably
0.15m.Basis uses C35 concrete strip foundation 11, as described in figures 1 and 5.
Such as Fig. 2 and 3, agent on crack resistance of concrete sliding pile 12 is set at two level, Three-level Platform end, often locates more, is set by spacing, stake top
Binder 13 is set.In the present invention, friction pile is more preferably a diameter of 2.0m C45 agent on crack resistance of concrete sliding piles, specific arrangement
For：Often locate 5 below original ground, stake spacing 2.2m；More than ground often locate 3, stake spacing 4.4m；Binder is set at ground, is
Beam size is long 11.8m, wide 3m, high 1m.Friction pile can play supporting and retaining system gliding mass, stable side slope, protect the effect of bridge pier.
Such as Fig. 2, secondary levee and 33# bridge piers infall set that 7m is wide, vertical section direction 8m Wide Worktables along profile direction, platform
Three weeks domatic ratios of slope 1:1.25, platform and domatic use M7.5 mortar flag stones are built by laying bricks or stones, thick 0.4m.
This surcharge reaction ruggedized construction in addition to suitable for great Qian Shi ridges, from similar huge loose talus wear by other tunnels
The landforms situation crossed, is also applied for the present invention.
The better embodiment of the present invention is explained in detail above, but the present invention is not limited to above-mentioned embodiment party
Formula, can also be on the premise of present inventive concept not be departed from one skilled in the relevant art's possessed knowledge
Various changes can be made, belongs to the protection content of the present invention.
Claims (6)
- A kind of 1. huge loose talus tunnel entrance surcharge reaction ruggedized construction, it is characterised in that：Multistage stepped secondary levee is vertically provided with protection elevation, multistage secondary levee is filled using block stone soil filler；It is multistage secondary The platform of dike is protected with Caused by Sloping Surfaces using double-deck dry-laid rubble, and blotter is provided below in double-deck dry-laid rubble protection；Slope Concrete guard wall is provided with pin；Upstream side bank protection connect with secondary levee multi-stage platform it is domatic using cone, the centrum it is domatic for upstream pleurocentrum it is domatic, upstream Pleurocentrum is domatic to be protected using mortar rubble masonry pavement, and bank protection has blotter, and basis is using C35 concrete spoon type basis；Downstream bank protection connect with secondary levee multi-stage platform it is domatic using centrum, the centrum it is domatic for downstream pleurocentrum it is domatic, downstream Side cone is domatic to use double-deck dry-laid rubble slope protection prevention, and bank protection has blotter, and basis uses concrete strip foundation；Two level, the big mileage side of Three-level Platform are provided with agent on crack resistance of concrete sliding pile, often locates more, is set by spacing, stake top sets system Beam.
- 2. huge loose talus tunnel entrance surcharge reaction ruggedized construction according to claim 1, it is characterised in that：Ladder Shape secondary levee is three-level, and the every thickness degree for the double-deck dry-laid rubble protection that the platform of three-level secondary levee is used using Caused by Sloping Surfaces is double as 0.3m The blotter thickness that layer dry-laid rubble protection is provided below is 0.15m；The a height of 4m of wall of the concrete guard wall set at toe.
- 3. huge loose talus tunnel entrance surcharge reaction ruggedized construction according to claim 1, it is characterised in that：Upstream The domatic ratio of slope of side cone not steep 1:2.0, the centrum is domatic to be protected using M7.5 mortar rubble masonry pavements, and bank protection thickness is 0.6m, And the thickness of the blotter set under bank protection is 0.15m.
- 4. huge loose talus tunnel entrance surcharge reaction ruggedized construction according to claim 1, it is characterised in that：Downstream The domatic ratio of slope of side cone not steep 1:2.0, every layer of bank protection thickness of the double-deck dry-laid rubble slope protection prevention of the domatic use of downstream cone Spend for 0.3m, and the thickness of the blotter set under bank protection is 0.15m.
- 5. huge loose talus tunnel entrance surcharge reaction ruggedized construction according to claim 1, it is characterised in that：Coagulation Native friction pile uses a diameter of 2.0m C45 agent on crack resistance of concrete sliding piles, often locates 5 below original ground, stake spacing 2.2m；It is more than ground Often locate 3, stake spacing 4.4m.
- 6. huge loose talus tunnel entrance surcharge reaction ruggedized construction according to claim 1, it is characterised in that：Block stone From not easy-weathering in native filler, the stone based on cusped edge shape, the quality that packing material size is more than 200mm particles exceedes gross mass 50%, the maximum particle diameter of filler is less than the 2/3 of 300mm or paving thickness；The compacting criteria of filler is using coefficient of subgrade reaction as control Index processed, coefficient of subgrade reaction K/30 are not less than 130MPa/m.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710595018.4A CN107503360B (en) | 2017-07-20 | 2017-07-20 | Huge loose rock pile tunnel import is piled and is carried back pressure reinforced structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710595018.4A CN107503360B (en) | 2017-07-20 | 2017-07-20 | Huge loose rock pile tunnel import is piled and is carried back pressure reinforced structure |
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| CN107503360A true CN107503360A (en) | 2017-12-22 |
| CN107503360B CN107503360B (en) | 2020-01-24 |
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