CN109826081A - Large-scale solution cavity, underground river span of arch structure and construction method in a kind of tunnel - Google Patents

Large-scale solution cavity, underground river span of arch structure and construction method in a kind of tunnel Download PDF

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Publication number
CN109826081A
CN109826081A CN201910252853.7A CN201910252853A CN109826081A CN 109826081 A CN109826081 A CN 109826081A CN 201910252853 A CN201910252853 A CN 201910252853A CN 109826081 A CN109826081 A CN 109826081A
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CN
China
Prior art keywords
tunnel
solution cavity
fashioned iron
temporary support
arch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201910252853.7A
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Chinese (zh)
Inventor
李玲玉
黄灿
丁志刚
陈松洲
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Road and Bridge International Co Ltd
China Communication South Road and Bridge Co Ltd
CREEC Guiyang Survey Design and Research Co Ltd
Original Assignee
Middle Cross-Channel Bridge South Engineering Co Ltd
Road and Bridge International Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Middle Cross-Channel Bridge South Engineering Co Ltd, Road and Bridge International Co Ltd filed Critical Middle Cross-Channel Bridge South Engineering Co Ltd
Priority to CN201910252853.7A priority Critical patent/CN109826081A/en
Publication of CN109826081A publication Critical patent/CN109826081A/en
Pending legal-status Critical Current

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Abstract

The invention belongs to tunnels to cross over solution cavity technical field of construction, disclose large-scale solution cavity in a kind of tunnel, underground river span of arch structure and construction method, including complete basement rock, skewback, main arch ring, backfill layer, the protection of hole wall and fashioned iron temporary support, skewback is located at solution cavity, the top of the complete basement rock in underground river two sides, solution cavity, wall protection in hole is carried out around underground river, main arch ring is supported on the skewback of two sides, it is backfill layer between span of arch structure and top tunnel structure, constructing tunnel fashioned iron temporary support is divided into vertical fashioned iron temporary support and longitudinal fashioned iron temporary support, longitudinal fashioned iron temporary support is located at the lower section of tunnel structure, just branch rigid frame is fallen in longitudinal fashioned iron temporary support in tunnel, longitudinal fashioned iron temporary support to solution cavity bottom uses vertical fashioned iron temporary support.The configuration of the present invention is simple, stress is clear, span of arch structure have the advantages that span ability it is larger, it is material it is adaptable, durability is good.

Description

Large-scale solution cavity, underground river span of arch structure and construction method in a kind of tunnel
Technical field
The invention belongs to tunnels to cross over solution cavity technical field of construction, be related to large-scale solution cavity, underground river span of arch knot in a kind of tunnel Structure and construction method.
Background technique
During the tunnel construction of mountain terrain, the case where passing through solution cavity, molten chamber and underground river is frequently encountered, backfill is generallyd use The methods of slip casting, bridge leap processing.Backfill slip casting and use rubble, the soil body and Concrete Filled, be usually used in handling small-sized solution cavity, Molten chamber;Large-scale solution cavity, underground river space are larger, and there are underground water, to avoid largely backfilling and convenient for draining, generally using bridge It is crossed over, but bridge construction difficulty is larger in large-scale solution cavity, underground river.
Summary of the invention
In view of this, the purpose of the present invention is to provide solution cavity large-scale in a kind of tunnel, underground river span of arch structure and construction parties Method.
In order to achieve the above objectives, the invention provides the following technical scheme:
Large-scale solution cavity, underground river span of arch structure in a kind of tunnel, including complete basement rock, skewback, main arch ring, backfill layer, hole wall Protection and fashioned iron temporary support, skewback are located at the top of solution cavity, the complete basement rock in underground river two sides, carry out hole around solution cavity, underground river Wall protection, main arch ring are supported on the skewback of two sides, are backfill layer, constructing tunnel fashioned iron between span of arch structure and top tunnel structure Temporary support is divided into vertical fashioned iron temporary support and longitudinal fashioned iron temporary support, longitudinal fashioned iron temporary support are located at tunnel structure Lower section, just branch rigid frame is fallen in longitudinal fashioned iron temporary support in tunnel, and longitudinal fashioned iron temporary support to solution cavity bottom uses vertical fashioned iron Temporary support.
Further, Concrete Filled is used in backfill layer.
Further, hole wall protection is protected using Bolt net and jet.
Further, skewback is poured using dry microdilatancy early strength concrete.
The construction method of large-scale solution cavity in a kind of tunnel, underground river span of arch structure, specific step are as follows:
S1: technique is chosen: according to solution cavity size and type, choosing suitable structure type, material type specification, in conjunction with existing Field investigation, formulates detailed construction scheme, draws detailed construction figure;
S2: excavating and the protection of hole wall: excavating free face and solution cavity hole top, hole wall carry out the protection of hole wall;
S3: fashioned iron temporary support: just branch rigid frame is fallen in longitudinal fashioned iron temporary support in tunnel, and longitudinal fashioned iron temporary support is extremely Solution cavity bottom uses vertical fashioned iron temporary support;
S4: arch seat construction: after skewback excavation of foundation pit is good, skewback is poured;
S5: it applies main arch ring: after the completion of arch seat construction, applying main arch ring;
S6: backfill layer construction: the gap between main arch ring structure upper and the tunnel inverted arch of tunnel structure, using concrete It backfills and levelling;
S7: tunnel structure construction: tunnel lining structure construction is carried out.
Further, in step S4, skewback is excavated is constructed using static blasting.
Further, after the completion of main arch ring applies in step S5, empty slag is cleaned out below main arch ring.
The beneficial effects of the present invention are:
(1) the configuration of the present invention is simple, stress is clear, and span of arch structure has span ability larger, material adaptable, resistance to The good advantage of long property.
(2) span of arch lower space is big, and drainage performance is good, and can play a protective role to groundwater environment.
(3) present invention can avoid using span of arch structure because of waste of material caused by increasing girder, and guarantee that structure safely may be used It leans on;For project amount can be greatly reduced across large-scale solution cavity, underground river, avoid to a large amount of backfills of solution cavity, underground river and convenient for row Water accelerates construction progress, and economic benefit is obvious.
Other advantages, target and feature of the invention will be illustrated in the following description to a certain extent, and And to a certain extent, based on will be apparent to those skilled in the art to investigating hereafter, Huo Zheke To be instructed from the practice of the present invention.Target of the invention and other advantages can be realized by following specification and It obtains.
Detailed description of the invention
To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention is made below in conjunction with attached drawing excellent The detailed description of choosing, in which:
Fig. 1 is the structural front view of the invention embodiment;
Fig. 2 is the structural side view of the invention embodiment;
Fig. 3 is the span of arch structure chart of the invention embodiment;
Fig. 4 is the construction flow chart of the invention embodiment.
Description of symbols:
1, complete basement rock;2, skewback;3, main arch ring;4, layer is backfilled;5, hole wall protects;6, fashioned iron temporary support;6-1, it indulges To fashioned iron temporary support;6-2, vertical fashioned iron temporary support;7, tunnel structure.
Specific embodiment
Illustrate embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this specification Other advantages and efficacy of the present invention can be easily understood for disclosed content.The present invention can also pass through in addition different specific realities The mode of applying is embodied or practiced, the various details in this specification can also based on different viewpoints and application, without departing from Various modifications or alterations are carried out under spirit of the invention.It should be noted that diagram provided in following embodiment is only to show Meaning mode illustrates basic conception of the invention, and in the absence of conflict, the feature in following embodiment and embodiment can phase Mutually combination.
Wherein, the drawings are for illustrative purposes only and are merely schematic diagrams, rather than pictorial diagram, should not be understood as to this The limitation of invention;Embodiment in order to better illustrate the present invention, the certain components of attached drawing have omission, zoom in or out, not Represent the size of actual product;It will be understood by those skilled in the art that certain known features and its explanation may be omitted and be in attached drawing It is understood that.
The same or similar label correspond to the same or similar components in the attached drawing of the embodiment of the present invention;It is retouched in of the invention In stating, it is to be understood that if there is the orientation or positional relationship of the instructions such as term " on ", "lower", "left", "right", "front", "rear" To be based on the orientation or positional relationship shown in the drawings, be merely for convenience of description of the present invention and simplification of the description, rather than indicate or It implies that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore is described in attached drawing The term of positional relationship only for illustration, is not considered as limiting the invention, for the ordinary skill of this field For personnel, the concrete meaning of above-mentioned term can be understood as the case may be.
As shown in Figures 1 to 4, large-scale solution cavity, underground river span of arch structure in a kind of tunnel, including complete basement rock 1, skewback 2, main arch Circle 3, backfill layer 4, hole wall protection 5 and fashioned iron temporary support 6.Skewback 2 is located at the top of solution cavity, the complete basement rock 1 in underground river two sides, molten Hole wall protection 5 is carried out around hole, underground river, main arch ring 3 is supported on two sides skewback 2, span of arch structure and top tunnel structure 7 it Between for backfill layer 4, backfill layer 4 in use Concrete Filled.Constructing tunnel fashioned iron temporary support 6 is divided for vertical fashioned iron temporary support 6-2 and longitudinal fashioned iron temporary support 6-1, longitudinal fashioned iron temporary support 6-1 are located at the lower section of tunnel structure 7, the first branch rigid frame in tunnel It falls on longitudinal fashioned iron temporary support 6-1, longitudinal fashioned iron temporary support 6-1 to solution cavity bottom uses vertical fashioned iron temporary support 6-2.
The construction method of the invention:
(1) technique is chosen: according to solution cavity size and type, choosing suitable structure type, material type specification;In conjunction with existing Field investigation, formulates detailed construction scheme, draws detailed construction figure;
(2) it excavates and hole wall protects 5: excavating free face and solution cavity hole top, hole wall carries out hole wall protection 5, and hole wall protects 5 to adopt It is protected with Bolt net and jet;
(3) fashioned iron temporary support 6: just branch rigid frame is fallen on longitudinal fashioned iron temporary support 6-1 in tunnel, and longitudinal fashioned iron temporarily props up It supports 6-1 and uses vertical fashioned iron temporary support 6-2 to solution cavity bottom, longitudinal, vertical and reinforcement steelframe connection will securely, type steel support bottom Portion enters rock 0.5-1m, forbids bottom hanging.
(4) skewback 2 is constructed: skewback 2 is excavated is constructed using static blasting, micro- using dry after 2 excavation of foundation pit of skewback is good Expansion early strength concrete pours skewback 2;
(5) apply main arch ring 3: after the completion of skewback 2 is constructed, applying main arch ring 3, main arch ring 3 according to solution cavity, underground river depth and Width can be used the modes such as precast assembly, support cast-in-place and construct, and after the completion of main arch ring 3 applies, the empty slag in 3 lower section of main arch ring needs to clear up Completely, in order to avoid blocking original water passage;
(6) backfill layer 4 is constructed: the gap between 3 structure upper of main arch ring and the tunnel inverted arch of tunnel structure 7, using mixed Solidifying earthen backfill is simultaneously levelling;
(7) tunnel structure 7 is constructed: carrying out tunnel lining structure construction.
To prevent solution cavity, the unexpected water burst of underground river water inlet, waterwall, the reserved water outlet in bottom is arranged in construction period water inlet Mouthful, water outlet status can be monitored at any time.
The present invention is directed to the deficiency of traditional technology, using solution cavity span of arch structure large-scale in a kind of tunnel and construction method, needle To the medium-and-large-sized solution cavity of the prior art, underground underground river tunnel across difficulty of construction is big, construction speed is slow and the high problem of construction cost, this Innovation and creation can make full use of that arch bridge span ability is larger, feature adaptable, durability is good of material, apply to reduce Work difficulty reduces construction cost, and span of arch lower space is big, and drainage performance is good.
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to compared with Good embodiment describes the invention in detail, those skilled in the art should understand that, it can be to skill of the invention Art scheme is modified or replaced equivalently, and without departing from the objective and range of the technical program, should all be covered in the present invention Scope of the claims in.

Claims (7)

1. large-scale solution cavity, underground river span of arch structure in a kind of tunnel, it is characterised in that: including complete basement rock (1), skewback (2), main arch Circle (3), backfill layer (4), hole wall protection (5) and fashioned iron temporary support (6), skewback (2) are located at solution cavity, the complete basement rock in underground river two sides (1) top carries out hole wall protection (5) around solution cavity, underground river, and main arch ring (3) is supported on two sides skewback (2), span of arch knot It is backfill layer (4) between structure and top tunnel structure (7), constructing tunnel fashioned iron temporary support (6) is divided into vertical fashioned iron and temporarily props up It supports (6-2) and longitudinal fashioned iron temporary support (6-1), longitudinal fashioned iron temporary support (6-1) is located at the lower section of tunnel structure (7), tunnel Just branch rigid frame is fallen on longitudinal fashioned iron temporary support (6-1) in road, and longitudinal fashioned iron temporary support (6-1) to solution cavity bottom uses vertical type Steel temporary support (6-2).
2. large-scale solution cavity, underground river span of arch structure in tunnel according to claim 1, it is characterised in that: adopted in backfill layer (4) Use Concrete Filled.
3. large-scale solution cavity, underground river span of arch structure in tunnel according to claim 1, it is characterised in that: hole wall protection (5) is adopted It is protected with Bolt net and jet.
4. large-scale solution cavity, underground river span of arch structure in tunnel according to claim 1, it is characterised in that: skewback (2) is using dry Rigid microdilatancy early strength concrete pours.
5. the construction method of large-scale solution cavity in a kind of tunnel, underground river span of arch structure, which is characterized in that specific step are as follows:
S1: technique is chosen: according to solution cavity size and type, choosing suitable structure type, material type specification is adjusted in conjunction with scene It looks into, formulates detailed construction scheme, draw detailed construction figure;
S2: excavating and hole wall protection (5): excavating free face and solution cavity hole top, hole wall carry out the protection of hole wall (5);
S3: fashioned iron temporary support (6): just branch rigid frame is fallen on longitudinal fashioned iron temporary support (6-1) in tunnel, and longitudinal fashioned iron temporarily props up (6-1) is supportted to solution cavity bottom using vertical fashioned iron temporary support (6-2);
S4: after skewback (2) excavation of foundation pit is good, skewback (2) skewback (2) construction: are poured;
S5: it applies main arch ring (3): after the completion of skewback (2) construction, applying main arch ring (3);
S6: backfill layer (4) construction: the gap between main arch ring (3) structure upper and the tunnel inverted arch of tunnel structure (7) uses Concrete backfill is simultaneously levelling;
S7: tunnel structure (7) construction: tunnel lining structure construction is carried out.
6. the construction method of large-scale solution cavity in tunnel according to claim 5, underground river span of arch structure, it is characterised in that: step In rapid S4, skewback (2) is excavated is constructed using static blasting.
7. the construction method of large-scale solution cavity in tunnel according to claim 5, underground river span of arch structure, it is characterised in that: step After the completion of main arch ring (3) applies in rapid S5, empty slag is cleaned out below main arch ring (3).
CN201910252853.7A 2019-03-29 2019-03-29 Large-scale solution cavity, underground river span of arch structure and construction method in a kind of tunnel Pending CN109826081A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111878096A (en) * 2020-07-30 2020-11-03 中铁五局集团有限公司 Karst cave backfilling method based on karst cave underground river environment tunnel construction
CN111878089A (en) * 2020-07-30 2020-11-03 中铁五局集团有限公司 Karst cave section grouting reinforcement construction method based on karst cave underground river environment tunnel construction
CN111878093A (en) * 2020-07-30 2020-11-03 中铁五局集团有限公司 Construction method for side area of tunnel main tunnel in tunnel construction of karst cave and underground river environment
CN111878086A (en) * 2020-07-30 2020-11-03 中铁五局集团有限公司 Peripheral construction channel arrangement method based on karst cave underground river environment tunnel construction
CN111894603A (en) * 2020-07-30 2020-11-06 中铁五局集团有限公司 Tunnel construction method based on karst cave underground river environment

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111878096A (en) * 2020-07-30 2020-11-03 中铁五局集团有限公司 Karst cave backfilling method based on karst cave underground river environment tunnel construction
CN111878089A (en) * 2020-07-30 2020-11-03 中铁五局集团有限公司 Karst cave section grouting reinforcement construction method based on karst cave underground river environment tunnel construction
CN111878093A (en) * 2020-07-30 2020-11-03 中铁五局集团有限公司 Construction method for side area of tunnel main tunnel in tunnel construction of karst cave and underground river environment
CN111878086A (en) * 2020-07-30 2020-11-03 中铁五局集团有限公司 Peripheral construction channel arrangement method based on karst cave underground river environment tunnel construction
CN111894603A (en) * 2020-07-30 2020-11-06 中铁五局集团有限公司 Tunnel construction method based on karst cave underground river environment

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Effective date of registration: 20201015

Address after: 101117 Beijing City Lucheng town Tongzhou District Tong Hu Street 8 No. 1 room 001

Applicant after: ROAD & BRIDGE INTERNATIONAL Co.,Ltd.

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Address before: 101117 Beijing City Lucheng town Tongzhou District Tong Hu Street 8 No. 1 room 001

Applicant before: ROAD & BRIDGE INTERNATIONAL Co.,Ltd.

Applicant before: CHINA COMMUNICATION SOUTH ROAD & BRIDGE Co.,Ltd.