CN203515597U - Tunnel structure applicable to soft stratum - Google Patents

Tunnel structure applicable to soft stratum Download PDF

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Publication number
CN203515597U
CN203515597U CN201320645563.7U CN201320645563U CN203515597U CN 203515597 U CN203515597 U CN 203515597U CN 201320645563 U CN201320645563 U CN 201320645563U CN 203515597 U CN203515597 U CN 203515597U
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tunnel
base plate
applicable
root pile
tunnel structure
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CN201320645563.7U
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王联
李玉文
张兆杰
林国进
郑金龙
田尚志
田志宇
高世军
李泳伸
周仁强
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Sichuan Department of Transportation Highway Planning Prospecting and Design Research Institute
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Sichuan Department of Transportation Highway Planning Prospecting and Design Research Institute
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Abstract

The utility model relates to tunnel structures and provides a tunnel structure applicable to soft stratum. The tunnel structure comprises combined type tunnel linings, wherein the radial lining comprises primary supports and secondary linings, and the circular lining comprises arch portions, bottom boards and both side walls, which enclose a closed structure. The connection portions between the both side walls and the bottom boards are provided with side root piles, the root piles on both sides are longitudinally arranged at intervals along the tunnel, and the top ends of the root piles are fixedly connected to the linings and inclined towards the outside of the linings to be inserted into surrounding rock. By closing the surrounding rock through the closed linings, overlarge relaxing deformation of the surrounding rock can be avoided and accordingly the integral bearing capacity of the tunnel structure can be improved; the root piles on both sides are distributed in a splay shape to support the closed linings and meanwhile are longitudinally arranged at intervals along the tunnel, thereby effectively controlling settlement during the service period of the tunnel and being fit for in-tunnel construction conditions and safe and convenient to construct. The tunnel structure is applicable to traversing various types of soft stratum.

Description

Be applicable to the tunnel structure of soft stratum
Technical field
The utility model relates to tunnel structure, especially a kind of tunnel structure that is applicable to soft stratum.
Background technology
Tunnel is a kind of building at underground engineering structure, is widely used in the fields such as traffic, mine, water conservancy and national defence.Tunnel construction thing can be divided into main building thing and ancillary building two large divisions generally, and wherein main building thing comprises barrel lining cutting and portal.Lining cutting is to keep tunnel stable for reinforcing barrel, prevents that country rock from being also the barrel works that stratum weathering off occurs or caves in around; Portal is for stable side slope, guiding surface water, for the access of Strengthening Tunnel.
The lining cutting in tunnel adopts domes conventionally, comprises arch and both sides abutment wall.And the form of structure of current lining cutting adopts composite lining conventionally, comprise the waterproofing course between preliminary bracing, secondary lining and preliminary bracing and secondary lining, preliminary bracing be restriction country rock in the distortion of construction period, reach the temporary transient stable of country rock; Secondary lining be to provide structure safety stock, bear later stage pressure from surrounding rock; And waterproofing course has waterproof effect, and can reduce the concrete shrinkage crack of secondary lining, provide buffering to reduce deformation pressure.
As a kind of, build at underground engineering structure, tunnel inevitably can run into soft stratum.Soft stratum is often referred to the stratum that bearing capacity is less than 150kPa, mainly comprises soft layer.So-called soft layer be in softly moulding, the stickiness soil layer that stream is moulded state, the sandy soils in loose condition (of surface), undressed banketing and other high-compressibility soil layers, it has that intensity is low, compressibilty is high and the feature such as permeability is poor.Pass through the tunnel of soft stratum, be subject to the impact as the soft stratum low bearing capacity of substrate, under the effect of the factors such as traffic loading, geology variation and groundwater change, very easily in the operation phase, produce sedimentation disease, therefore control its tunnel subsidence in the operation phase and be and guarantee one of workmanship and safe key technical problem.
Concretely, when Tunnel Base bearing capacity is less than 150kPa, Tunnel Base is carried out to consolidation process, to improve its bearing capacity, control operation phase tunnel subsidence.Traditional substrate Scheme of Strengthening comprises: hand excavated pile, cast-in-place concrete pile, preformed pile, high-pressure rotary jet grouting pile, substrate are changed and filled out etc.But because Tunnel Base is processed the restriction of narrow and small place in impact that construction plant is subject to tunnel tunnel face excavation and hole, tunnel excavation, tunnel support and substrate are reinforced and on time and space, are influenced each other and disturb, and hand excavated pile, cast-in-place concrete pile, preformed pile, high-pressure rotary jet grouting pile are difficult to meet in-cavity construction condition.And substrate altering fill, cycle period is long, and to country rock serious interference, working security is poor, and processes and to have limitation, only can process the weak substrate that thickness is not more than 3m.Therefore, develop and a kind ofly can effectively control tunnel operation phase sedimentation, simultaneous adaptation becomes an instant job in the tunnel structure of in-cavity construction condition and easy construction, safety.
Utility model content
Technical problem to be solved in the utility model is to provide a kind ofly can effectively control tunnel operation phase sedimentation, and simultaneous adaptation is in the tunnel structure that is applicable to soft stratum of in-cavity construction condition and easy construction, safety.
The utility model solves the technical scheme that its technical problem adopts: the tunnel structure that is applicable to soft stratum, comprise composite lining, radially described lining cutting comprises the preliminary bracing in outside and the secondary lining of inner side, along lining cutting described in hoop, comprise arch and both sides abutment wall, be provided with base plate, by arch, base plate and both sides abutment wall surround and form enclosed construction, in the junction of both sides abutment wall and base plate, be respectively arranged with limit root pile, the limit root pile of both sides all arranges along tunnel longitudinal separation, described each root pile top, limit and lining cutting is fixed and tilt to insert in country rock to lining cutting outside.
Further, be provided with top and base plate fixed and insert the end root pile in the country rock of base plate below, root pile of the described end is horizontally arranged at interval along base plate is vertical.Preferably root pile of the described end is by column-row arrangement and longitudinally insert country rock as a kind of, and the end root pile between adjacent lines along base plate laterally mutually stagger, end root pile between adjacent column longitudinally staggers mutually along base plate.Further, between the root pile of the adjacent end of each row end root pile, be provided with top and base plate is fixed and longitudinally implant the anchor pole in country rock or slip casting ductule below base plate.
Further, described base plate adopts inverted arch.
Further, connecting reinforcement is set, it is fixed that abutment wall bottom, the other end and inverted arch are implanted in described connecting reinforcement one end.
Further, be provided with ground water drainage structure, comprise header, tube connector, collection pipe and gutter; Described header surface array has spilled water hole and is embedded in outside abutment wall in country rock, and described collection pipe is positioned at base plate below and along base plate horizontal expansion, described each header and each collection pipe all arrange along tunnel longitudinal separation; Described tube connector is embedded in lining cutting, and is communicated with respectively corresponding collection pipe and header by each tube connector; Described gutter is positioned at base plate below and along tunnel longitudinal extension, each collection pipe is all connected with gutter.Concrete, be provided with french drain, the charge for remittance hole that described gutter is embedded in french drain and gutter top array has same french drain to be connected; Described collection pipe inserts in french drain and is connected with gutter through french drain.
The beneficial effects of the utility model are: by the lining cutting sealing country rock of sealing, prevent the excessive lax distortion of country rock, improve the total bearing capacity of structure; Dual-side root pile is splayed to be arranged, the lining cutting of sealing is formed and supported, and limit root pile is along the setting of tunnel longitudinal separation, therefore, can effectively control tunnel operation phase sedimentation.Owing to only increasing root pile and base plate, so easy construction; And the construction of root pile, noise and vibration are very little, and little for the disturbance of country rock, required construction plant is less, is therefore adapted to in-cavity construction condition and construction safety.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiment mono-;
Fig. 2 is the end root pile of embodiment mono-and the layout schematic diagram of slip casting ductule;
Fig. 3 is the structural representation of embodiment bis-;
Fig. 4 is the connection diagram of abutment wall and the inverted arch of embodiment bis-;
Fig. 5 is the layout schematic diagram of embodiment bis-discharge structures;
Fig. 6 is the french drain structural representation of embodiment bis-discharge structures.
The specific embodiment
The tunnel structure that is applicable to soft stratum of the present utility model, comprise composite lining 10, radially described lining cutting 10 comprises the preliminary bracing 14 in outside and the secondary lining 15 of inner side, along lining cutting described in hoop 10, comprise arch 11, base plate and both sides abutment wall 13, and by arch 11, base plate and both sides abutment wall 13 surround and form enclosed construction, in the junction of both sides abutment wall 13 and base plate, be respectively arranged with limit root pile 16, the limit root pile 16 of both sides all arranges along tunnel longitudinal separation, described each limit root pile 16 tops and lining cutting 10 is fixed and tilt to insert in country rocks to lining cutting 10 outsides.
In the cross section in tunnel, composite lining 10 is enclosed construction, by enclosed construction, seal country rock, prevent the excessive lax distortion of country rock, country rock plastic strain and deformation pressure are controlled to allowed band, improve the total bearing capacity of structure, by 16 pairs of annular enclosed composite linings 10 of dual-side root pile, form support simultaneously; Longitudinal along tunnel, dual-side root pile 16 all arranges along tunnel longitudinal separation, can be along tunnel longitudinally to forming complete support.Root pile adopts mud jacking pile, can jointly form root pile composite foundation by root pile and inter-pile soil, has higher bearing capacity; Meanwhile, dual-side root pile 16 is splayed in tilting insertion country rock to lining cutting 10 outsides to be arranged, can effectively increase the transverse width of the carrying soil body, disperses load, strengthens bearing capacity and stability.Therefore, the tunnel structure that is applicable to soft stratum of the present utility model, can effectively control tunnel operation phase sedimentation.
Owing to only need increasing root pile and base plate so easy construction on the basis of existing composite lining structure.And the construction of root pile, noise and vibration are very little, and little for the disturbance of country rock, required construction plant is less, is therefore adapted to in-cavity construction condition and construction safety.Meanwhile, also for above-mentioned reasons, tunnel structure of the present utility model, except for new built tunnel, also can be for the regulation of existing tunnel sedimentation disease.
In addition, root pile can be used for different geological conditions and the casta region such as miscellaneous fill, plain fill, gravelly soil, sand, silt, cohesive soil, collapsible loess, expansive soil, and can be for more than groundwater table, also can be used for below groundwater table, therefore tunnel structure of the present utility model can be applicable to all kinds of soft stratums, and compliance is good.
For tunnel lateral direction wider width, the poor situation of stratum bearing capacity, further, be provided with top and base plate fixed and insert the end root pile 17 in the country rock of base plate below, root pile 17 of the described end is indulged and is horizontally arranged at interval along base plate.In the cross section in tunnel, by complete support and the whole strengthening of transversely carrying the soil body of limit root pile 16 formation of end root pile 17 and both sides.The arrangement mode of end root pile 17 can arrange according to concrete formation condition, tunnel structure.
Wherein, preferably root pile 17 of the described end is by column-row arrangement and longitudinally insert country rock as a kind of, and the end root pile 17 between adjacent lines along base plate laterally mutually stagger, end root pile 17 between adjacent column longitudinally staggers mutually along base plate.This arrangement form, can effectively guarantee the strengthening to base plate below carrying soil body integral body, improves the globality of the carrying soil body.For bearing capacity is further provided, between each row end root pile root pile of the adjacent end 17 of 17, be provided with top and base plate is fixed and longitudinally implant the anchor pole in country rock or slip casting ductule 18 below base plate.
Further, described base plate adopts inverted arch 12, and inverted arch 12 can improve foundation bearing capacity, reduces and.
The bearing capacity of soft stratum is subject to influence on groundwater larger, therefore further, is provided with ground water drainage structure, comprises header, tube connector 32, collection pipe 33 and gutter 35; Described header surface array has spilled water hole and is embedded in abutment wall 13 outside country rocks, and described collection pipe 33 is positioned at base plate below and along base plate horizontal expansion, described each header and each collection pipe 33 all arrange along tunnel longitudinal separation; Described tube connector 32 is embedded in lining cutting 10, and is communicated with respectively corresponding collection pipe 33 and header by each tube connector 32; Described gutter 35 is positioned at base plate below and along tunnel longitudinal extension, each collection pipe 33 is all connected with gutter 35.The underground water of both sides, tunnel and top, both sides enters header through spilled water hole, then by the transverse drainage pipeline being formed by header, tube connector 32, collection pipe 33, enter gutter 35, and finally by gutter 35, be expelled to earth's surface, therefore can effectively reduce the water level of underground water, make soil solidifying, improve bearing capacity and guarantee the stable of bearing capacity.The tunnel structure that has discharge structure for secondary lining arranged outside, above-mentioned transverse drain can directly be connected with the longitudinal drainage pipe 31 in secondary lining outside, so it only needs to extend to outside secondary lining, without extending in country rock.
Above-mentioned end root pile, anchor pole, slip casting ductule and discharge structure, can select and combine according to concrete formation condition, to meet concrete structural stability requirement.Below in conjunction with drawings and Examples, the utility model is further illustrated.
Embodiment mono-
The present embodiment is a new built tunnel, and its country rock is mud stone folder carbonaceous mud stone, girdle, belongs to soft rock~dead-soft rock; And rock mass is affected seriously by geological structure, rock crushing, is the broken shape loose structure in angle.
As shown in Figure 1, the tunnel structure of the present embodiment, the composite lining 10 that comprises bent wall formula, radially described lining cutting 10 comprises the preliminary bracing 14 in outside and the secondary lining 15 of inner side, between preliminary bracing 14 and secondary lining 15, be provided with waterproofing course 19, along lining cutting described in hoop 10, comprise arch 11, inverted arch 12 and both sides abutment wall 13, and by arch 11, inverted arch 12 and both sides abutment wall 13 surround the enclosed construction that forms ring-type, junction at both sides abutment wall 13 and inverted arch 12 is respectively arranged with limit root pile 16, the limit root pile 16 of both sides all arranges along tunnel longitudinal separation, described each limit root pile 16 tops and lining cutting 10 is fixed and tilt to insert in country rocks to lining cutting 10 outsides.And as shown in Figure 1, in corresponding cross section, both sides arrange respectively two limit root piles 16, with side root pile 16, be splayed and arrange.
As shown in Figure 1 and Figure 2, be provided with top and inverted arch 12 fixed and longitudinally insert the end root pile 17 in inverted arch 12 below country rocks, root pile of the described end 17 is by column-row arrangement, and the end root pile 17 between adjacent lines along inverted arch 12 laterally mutually stagger, end root pile 17 between adjacent column longitudinally staggers mutually along inverted arch 12; Between each row end root pile root pile of the adjacent end 17 of 17, be provided with top and inverted arch 12 fixed and longitudinally implant the slip casting ductule in country rock 18 below inverted arch 12.
Embodiment bis-
The present embodiment is the regulation to an existing tunnel, and it is in red beds sand shale alternating layers district, and tunnel bed mud rock easily produces softening under underground water repeated action.Existing tunnel structure, comprises composite lining 10, and radially described lining cutting 10 comprises the preliminary bracing in outside and the secondary lining of inner side, along lining cutting described in hoop 10, comprises 11He both sides, arch abutment wall 13.
Tunnel structure after regulation, be also the present embodiment be applicable to soft stratum tunnel structure, as shown in Figure 3, Figure 4, set up inverted arch 12 and cover lining 20; Connecting reinforcement 21 is set, and it is fixed that abutment wall 13 bottoms, the other end and inverted arch 12 are implanted in described connecting reinforcement 21 one end; Radially described lining cutting 10 comprises the preliminary bracing in outside, the secondary lining between the cover of inner side lining 20 and preliminary bracing and cover lining 20, along hoop, by arch 11, inverted arch 12 and both sides abutment wall 13, surround the enclosed construction that forms ring-type, junction at both sides abutment wall 13 and inverted arch 12 is respectively arranged with limit root pile 16, the limit root pile 16 of both sides all arranges along tunnel longitudinal separation, described each limit root pile 16 tops with lining cutting 10 is fixed and to lining cutting 10 outsides, tilt insertion country rocks in.
As Fig. 5, shown in Fig. 6, be provided with ground water drainage structure, because former secondary lining arranged outside has discharge structure, therefore, in transformation process, collection pipe 33 and gutter 35 are only set, wherein collection pipe 33 is positioned at inverted arch 12 belows and along inverted arch 12 horizontal expansions, each collection pipe 33 arranges along tunnel longitudinal separation, described gutter 35 is positioned at inverted arch 12 belows and along tunnel longitudinal extension, each collection pipe 33 is communicated with respectively and is communicated with through tube connector 32 the longitudinal drainage pipe 31 in former secondary lining outside with the former tube connector 32 being embedded in secondary lining, the other end of each collection pipe 33 is communicated with gutter 35 respectively.Concrete, be provided with french drain 34, the charge for remittance hole 36 that described gutter 35 is embedded in french drain 34 and gutter 35 top array have same french drain 34 to be connected; Described collection pipe 33 inserts in french drain 34 and is connected with gutter 35 through french drain 34.

Claims (8)

1. be applicable to the tunnel structure of soft stratum, comprise composite lining (10), radially described lining cutting (10) comprises the preliminary bracing (14) in outside and the secondary lining (15) of inner side, along lining cutting described in hoop (10), comprise arch (11) and both sides abutment wall (13), it is characterized in that: be provided with base plate, by arch (11), base plate and both sides abutment wall (13) surround and form enclosed construction, in the junction of both sides abutment wall (13) and base plate, be respectively arranged with limit root pile (16), the limit root pile (16) of both sides all arranges along tunnel longitudinal separation, described each limit root pile (16) top and lining cutting (10) is fixed and tilt to insert in country rock to lining cutting (10) outside.
2. the tunnel structure that is applicable to soft stratum as claimed in claim 1, is characterized in that: be provided with top and base plate fixed and insert the end root pile (17) in the country rock of base plate below, root pile of the described end (17) is horizontally arranged at interval along base plate is vertical.
3. the tunnel structure that is applicable to soft stratum as claimed in claim 2, it is characterized in that: root pile of the described end (17) is by column-row arrangement longitudinally insert country rock, and the end root pile (17) between adjacent lines along base plate laterally mutually stagger, end root pile (17) between adjacent column longitudinally staggers mutually along base plate.
4. the tunnel structure that is applicable to soft stratum as claimed in claim 3, is characterized in that: between the root pile of the adjacent end (17) of each row end root piles (17), be provided with top with base plate is fixed and longitudinally implant anchor pole or the slip casting ductule (18) in country rock below base plate.
5. the tunnel structure that is applicable to soft stratum as described in claim 1,2,3 or 4, is characterized in that: described base plate adopts inverted arch (12).
6. the tunnel structure that is applicable to soft stratum as claimed in claim 5, is characterized in that: connecting reinforcement (21) is set, and it is fixed that abutment wall (13) bottom, the other end and inverted arch (12) are implanted in described connecting reinforcement (21) one end.
7. the tunnel structure that is applicable to soft stratum as claimed in claim 1, is characterized in that: be provided with ground water drainage structure, comprise header, tube connector (32), collection pipe (33) and gutter (35); Described header surface array has spilled water hole and is embedded in the country rock of abutment wall (13) outside, and described collection pipe (33) is positioned at base plate below and along base plate horizontal expansion, described each header and each collection pipe (33) all arrange along tunnel longitudinal separation; Described tube connector (32) is embedded in lining cutting (10), and is communicated with respectively corresponding collection pipe (33) and header by each tube connector (32); Described gutter (35) is positioned at base plate below and along tunnel longitudinal extension, each collection pipe (33) is all connected with gutter (35).
8. the tunnel structure that is applicable to soft stratum as claimed in claim 7, it is characterized in that: be provided with french drain (34), the charge for remittance hole (36) that described gutter (35) is embedded in french drain (34) and gutter (35) top array has same french drain (34) to be connected; Described collection pipe (33) inserts in french drain (34) and is connected through the same gutter of french drain (34) (35).
CN201320645563.7U 2013-10-18 2013-10-18 Tunnel structure applicable to soft stratum Active CN203515597U (en)

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104805825A (en) * 2014-11-28 2015-07-29 邓敬森 Pretreatment method adopted before subway tunnel being excavated
CN105443141A (en) * 2015-11-30 2016-03-30 中国神华能源股份有限公司 Tunnel base reinforcement method
CN105927272A (en) * 2016-06-12 2016-09-07 中铁二院工程集团有限责任公司 Floor anchoring constraint tunnel lining structure
CN106401602A (en) * 2016-11-15 2017-02-15 西南交通大学 Flotation, sinking and water pressure resistant shock absorption tunnel structure of water-rich unconsolidated stratum
CN106437748A (en) * 2016-06-12 2017-02-22 中铁二院工程集团有限责任公司 Separated maintainable tunnel lining structure
CN106522979A (en) * 2016-11-15 2017-03-22 西南交通大学 Anti-sinking non-pressure tunnel structure in collapsible loess
CN109958456A (en) * 2019-04-25 2019-07-02 南昌工程学院 A kind of advance reinforcement construction method for building tunnel in the stratum of no self-stable ability
CN110005444A (en) * 2019-05-05 2019-07-12 西南交通大学 Highly seismic region method for tunnel construction and tunnel support structure
CN111441794A (en) * 2020-05-06 2020-07-24 中车建设工程有限公司 Underground excavation construction method and structure for rebuilding existing tunnel into double-layer tunnel
CN111810185A (en) * 2020-06-30 2020-10-23 中铁二院工程集团有限责任公司 Tunnel bottom pre-reinforcement construction method
CN112392517A (en) * 2021-01-18 2021-02-23 中铁工程设计咨询集团有限公司 Tunnel tree root type tunnel bottom structure and construction method thereof
CN112682063A (en) * 2020-12-31 2021-04-20 中铁二院工程集团有限责任公司 Support structure for inhibiting bottom deformation of high-ground-stress soft rock tunnel

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104805825A (en) * 2014-11-28 2015-07-29 邓敬森 Pretreatment method adopted before subway tunnel being excavated
CN105443141A (en) * 2015-11-30 2016-03-30 中国神华能源股份有限公司 Tunnel base reinforcement method
CN105927272B (en) * 2016-06-12 2019-01-04 中铁二院工程集团有限责任公司 Bottom plate anchors restricted type tunnel lining structure
CN105927272A (en) * 2016-06-12 2016-09-07 中铁二院工程集团有限责任公司 Floor anchoring constraint tunnel lining structure
CN106437748A (en) * 2016-06-12 2017-02-22 中铁二院工程集团有限责任公司 Separated maintainable tunnel lining structure
CN106437748B (en) * 2016-06-12 2019-01-22 中铁二院工程集团有限责任公司 A kind of separate type can repair tunnel lining structure
CN106401602B (en) * 2016-11-15 2019-02-15 西南交通大学 The non-consolidating stratum anti-floating of rich water is anti-to sink damping tunnel structure resistant to pressure
CN106522979A (en) * 2016-11-15 2017-03-22 西南交通大学 Anti-sinking non-pressure tunnel structure in collapsible loess
CN106401602A (en) * 2016-11-15 2017-02-15 西南交通大学 Flotation, sinking and water pressure resistant shock absorption tunnel structure of water-rich unconsolidated stratum
CN109958456A (en) * 2019-04-25 2019-07-02 南昌工程学院 A kind of advance reinforcement construction method for building tunnel in the stratum of no self-stable ability
CN110005444A (en) * 2019-05-05 2019-07-12 西南交通大学 Highly seismic region method for tunnel construction and tunnel support structure
CN111441794A (en) * 2020-05-06 2020-07-24 中车建设工程有限公司 Underground excavation construction method and structure for rebuilding existing tunnel into double-layer tunnel
CN111441794B (en) * 2020-05-06 2022-07-01 中车建设工程有限公司 Underground excavation construction method and structure for rebuilding existing tunnel into double-layer tunnel
CN111810185A (en) * 2020-06-30 2020-10-23 中铁二院工程集团有限责任公司 Tunnel bottom pre-reinforcement construction method
CN111810185B (en) * 2020-06-30 2022-04-05 中铁二院工程集团有限责任公司 Tunnel bottom pre-reinforcement construction method
CN112682063A (en) * 2020-12-31 2021-04-20 中铁二院工程集团有限责任公司 Support structure for inhibiting bottom deformation of high-ground-stress soft rock tunnel
CN112392517A (en) * 2021-01-18 2021-02-23 中铁工程设计咨询集团有限公司 Tunnel tree root type tunnel bottom structure and construction method thereof
CN112392517B (en) * 2021-01-18 2021-04-13 中铁工程设计咨询集团有限公司 Tunnel tree root type tunnel bottom structure and construction method thereof

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