CN205605215U - Big section loess tunnel is grooving method construction structures in advance - Google Patents
Big section loess tunnel is grooving method construction structures in advance Download PDFInfo
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- CN205605215U CN205605215U CN201620224568.6U CN201620224568U CN205605215U CN 205605215 U CN205605215 U CN 205605215U CN 201620224568 U CN201620224568 U CN 201620224568U CN 205605215 U CN205605215 U CN 205605215U
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Abstract
The utility model discloses a big section loess tunnel is grooving method construction structures in advance takes the fine slip casting stock of D 32mm glass, two encircle in advance, and the lining cutting horn mouth partially sprays plain concrete or net shotcrete and erect the shaped steel steelframe when needs, and the T76S that side wall and every department of foot of a wall department established 2 root length 6m steps the type stake that declines, before inverted arch excavation erects the shaped steel steelframe, execute the inverted arch steelframe of doing at the pre -buried connector plates of the lining cutting foot of a wall in advance after with and adopt bolted connection. Construction risk and landslide are subsided, are reduced to the earth's surface that not only can control in the construction of big section loess tunnel, more can improve the efficiency of construction, accelerate the construction progress, guarantee construction quality. There is important meaning to improving in advance the grooving method in the adaptability on loess tunnel stratum and the mechanized construction level that improves loess tunnel.
Description
Technical field
This utility model relates to a kind of underground engineering technology, particularly relates to a kind of large-section loess tunnel pre-cut channel process constructing structure.
Background technology
Precutting trough construction technology is to use special arched type pre-cut scouring machine to cut groove in advance along tunnel cross section periphery subregion, irrigates C30 concrete immediately, form a pre-lining cutting in excavation face front after grooving in groove.The face excavation the most just defined by grooving processes; thus can efficiently reduce the surrouding rock deformation and ground settlement produced because of face excavation, and the construction operations such as the excavation in face, dregs shipment, inverted arch, guarded drainage, secondary lining can be operated under the protection of pre-lining cutting safely and efficiently.The method is possible not only to ground settlement, reduction construction risk and the landslide controlling in large-section loess tunnel construction, more can improve efficiency of construction, accelerating construction progress, guarantee construction quality.
Affected bigger for loess tunnel formation condition by its moisture content and sand factor, during the tunnel excavation of poor section of stratum, by can be potentially encountered, face is unstable and arch caves in or the risk of pre-lining cutting integral sinking, there is presently no the connection for the two key technical problem being likely encountered in constructing tunnel and inverted arch and pre-lining cutting and carries out particular study.
Utility model content
The purpose of this utility model is to provide a kind of large-section loess tunnel pre-cut channel process constructing structure that can improve efficiency of construction, accelerating construction progress, guarantee construction quality.
The purpose of this utility model is achieved through the following technical solutions:
Large-section loess tunnel pre-cut channel process constructing structure of the present utility model, including:
Solidifying of the working face structure: take Ф 32mm glass grouted anchor bar；
Prevent the structure of pre-lining cutting integral sinking: two rings pre-lining cutting horn section injection plain concrete or in-network processing also set up at profile steel frame, abutment wall and foundation often place when needed and set the T76S of 2 root lengths 6m and step formula mini pile；
The attachment structure of inverted arch steelframe and pre-lining cutting: before inverted arch excavation sets up profile steel frame, the pre-pre-buried junction steel plate of lining cutting foundation with after the inverted arch steelframe that performs with bolts.
The technical scheme provided by above-mentioned this utility model can be seen that, the large-section loess tunnel pre-cut channel process constructing structure that this utility model embodiment provides, it is possible not only to ground settlement, reduction construction risk and the landslide controlling in large-section loess tunnel construction, more can improve efficiency of construction, accelerating construction progress, guarantee construction quality.For improving the pre-cut channel process adaptability on loess tunnel stratum and improving the mechanization its construction level of loess tunnel and have great significance.
Accompanying drawing explanation
Fig. 1 is cross-sectional configuration schematic diagram in this utility model embodiment；
Fig. 2 is longitudinal plane structure schematic diagram in this utility model embodiment；
Fig. 3 is thin portion connecting structure schematic diagram in this utility model embodiment；
Icon explanation
1. glass anchor pole；2. plain concrete or in-network processing screed-coat；3. profile steel frame；4. step formula mini pile；
5～7. junction steel plates；8. inverted arch steelframe；9. bolt.
Detailed description of the invention
This utility model embodiment will be described in further detail below.
Large-section loess tunnel pre-cut channel process constructing structure of the present utility model, its preferably detailed description of the invention is:
Including:
Solidifying of the working face structure: take Ф 32mm glass grouted anchor bar；
Prevent the structure of pre-lining cutting integral sinking: two rings pre-lining cutting horn section injection plain concrete or in-network processing also set up at profile steel frame, abutment wall and foundation often place when needed and set the T76S of 2 root lengths 6m and step formula mini pile；
The attachment structure of inverted arch steelframe and pre-lining cutting: before inverted arch excavation sets up profile steel frame, the pre-pre-buried junction steel plate of lining cutting foundation with after the inverted arch steelframe that performs with bolts.
In described solidifying of the working face structure, the long 12m of glass anchor pole, longitudinal lap joint is not less than 2m, and spacing uses 1.5*1.5m or 1.2m*1.2m, and equilateral triangle is arranged.
In the described structure preventing pre-lining cutting integral sinking, φ 8mm bar-mat reinforcement screed-coat is set when the thickness spraying plain concrete or in-network processing is more than 20cm.
Described inverted arch steelframe, with the attachment structure of pre-lining cutting, has the paragraph of steelframe at the pre-pre-buried junction steel plate of lining cutting foundation for only inverted arch position.
Precutting trough construction technology is to use special arched type pre-cut scouring machine to cut groove in advance along tunnel cross section periphery subregion, irrigates C30 concrete immediately, form a pre-lining cutting in excavation face front after grooving in groove.The face excavation the most just defined by grooving processes; thus can efficiently reduce the surrouding rock deformation and ground settlement produced because of face excavation, and the construction operations such as the excavation in face, dregs shipment, inverted arch, guarded drainage, secondary lining can be operated under the protection of pre-lining cutting safely and efficiently.
Large-section loess tunnel pre-cut channel process constructing structure of the present utility model, the connection for the two key technical problem being likely encountered in constructing tunnel and inverted arch and pre-lining cutting carries out particular study.It is possible not only to ground settlement, reduction construction risk and the landslide controlling in large-section loess tunnel construction, more can improve efficiency of construction, accelerating construction progress, guarantee construction quality.For improving the pre-cut channel process adaptability on loess tunnel stratum and improving the mechanization its construction level of loess tunnel and have great significance.
This utility model must be accomplished in work progress:
1) determine whether face can be from steady according to combined factors such as the Grades of Surrounding Rock of Loess Layer and moisture content, it is impossible in the case of steady, tackle face carry out consolidation process in advance.
2) it is the integral sinking preventing pre-lining cutting, tackle between two ring pre-lining cutting horn section use plain concrete or or in-network processing leveling, and tackle abutment wall and foundation part arranges T76S and steps formula mini pile lock foot anchoring stock, and if desired profile steel frame is set in horn mouth V-belt according to strata condition.
3) inverted arch steelframe should use the mode of pre-embedded steel slab to be effectively connected with pre-lining cutting.
In whole work progress, the concrete control of construction method:
The necessity of solidifying of the working face, the strengthening length of glass anchor pole, spacing and the lap of splice.
Screed-coat between the two pre-lining cutting of ring processes thickness and the lock foot anchoring stock length of material, abutment wall and foundation and position.
Inverted arch steelframe is effectively connected with the reliable of pre-lining cutting.
The beneficial effects of the utility model are:
Make full use of pre-lining cutting and the protection of stable face (carrying out solidifying of the working face if desired) that pre-cut channel process is formed; it is capable of being operated the construction operations such as the tunneling boring excavation in face, dregs shipment, inverted arch, guarded drainage, secondary lining safely and efficiently, substantially increases efficiency of construction, accelerate construction speed, ensure that construction quality.
Control integral sinking and the stability of pre-lining cutting, will can effectively ensure that construction quality and the working security of pre-cut channel process, thus effectively reduce the construction risk such as ground settlement and surrouding rock deformation, the safety of constructing tunnel personnel and equipment is effectively ensured.
This utility model is applicable for use with the engineering of pre-cut channel process construction large-section loess tunnel, the integral sinking by the advance reinforcement measure of face, preventing pre-lining cutting and three key technologies of integrated connection carrying out pre-lining cutting and inverted arch, can guarantee construction safety and the construction quality of pre-cut channel process to greatest extent.
Specific embodiment:
During pre-cut channel process construction large-section loess tunnel, Chief technology and content are as follows:
As shown in Figure 1,2 and 3,
The stability contorting measure of face 1；
The sharpest edges of pre-cut channel process construction are the functions that the concrete lining that grooving irrigates in advance has advance support, construction supporting and permanent support concurrently, it is possible to achieve large cross section excavation.But due to Loess Layer when moisture content is higher or sandy content is higher it is possible that face cannot be from steady situation, the most in this case, should first use glass anchor pole that face is reinforced, carry out full face tunneling the most again.Solidifying of the working face preferably combines concrete strata condition and adjusts the length of glass anchor pole, the lap of splice and spacing.
The control measure of pre-lining cutting integral sinking；
Owing to pre-cut channel process has certain angle when grooving irrigates in tunnel longitudinal direction, the V-belt of a bell mouth shape can be formed between the two pre-lining cutting of ring, for preventing the integral sinking of pre-lining cutting, this V-belt planted agent arranges C25 element pneumatically placed concrete or in-network processing (when thickness is more than 20cm) screed-coat, and 3 Pin profile steel frame are set if desired depending on strata condition, simultaneously the T76S of 2 root lengths 6m is set at abutment wall and foundation and steps formula mini pile, to guarantee construction safety.
3) pre-lining cutting and the connection of inverted arch steelframe；
Have the paragraph of steelframe for only inverted arch position, for guaranteeing effectively being connected of inverted arch steelframe and pre-lining cutting, employing at the pre-pre-buried junction steel plate of lining cutting foundation, the most again with after the inverted arch steelframe that performs with bolts.
The above; it is only this utility model preferably detailed description of the invention; but protection domain of the present utility model is not limited thereto; any those familiar with the art is in the technical scope that this utility model discloses; the change that can readily occur in or replacement, all should contain within protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain of claims.
Claims (4)
1. a large-section loess tunnel pre-cut channel process constructing structure, it is characterised in that including:
Solidifying of the working face structure: take Ф 32mm glass grouted anchor bar；
Prevent the structure of pre-lining cutting integral sinking: two rings pre-lining cutting horn section injection plain concrete or in-network processing also set up at profile steel frame, abutment wall and foundation often place when needed and set the T76S of 2 root lengths 6m and step formula mini pile；
The attachment structure of inverted arch steelframe and pre-lining cutting: before inverted arch excavation sets up profile steel frame, the pre-pre-buried junction steel plate of lining cutting foundation with after the inverted arch steelframe that performs with bolts.
Large-section loess tunnel pre-cut channel process constructing structure the most according to claim 1, it is characterised in that in described solidifying of the working face structure, the long 12m of glass anchor pole, longitudinal lap joint is not less than 2m, and spacing uses 1.5*1.5m or 1.2m*1.2m, and equilateral triangle is arranged.
Large-section loess tunnel pre-cut channel process constructing structure the most according to claim 1, it is characterised in that described in prevent in the structure of pre-lining cutting integral sinking, when spraying the thickness of plain concrete or in-network processing more than 20cm, φ 8mm bar-mat reinforcement screed-coat is set.
Large-section loess tunnel pre-cut channel process constructing structure the most according to claim 1, it is characterised in that described inverted arch steelframe, with the attachment structure of pre-lining cutting, has the paragraph of steelframe at the pre-pre-buried junction steel plate of lining cutting foundation for only inverted arch position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620224568.6U CN205605215U (en) | 2016-03-22 | 2016-03-22 | Big section loess tunnel is grooving method construction structures in advance |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620224568.6U CN205605215U (en) | 2016-03-22 | 2016-03-22 | Big section loess tunnel is grooving method construction structures in advance |
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| CN205605215U true CN205605215U (en) | 2016-09-28 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106703837A (en) * | 2017-01-02 | 2017-05-24 | 王玉田 | Collapse-preventing construction method for subway tunnels |
| CN108457658A (en) * | 2018-03-14 | 2018-08-28 | 济南城建集团有限公司 | A kind of texture stratum tunnel list hole bidirectional construction crosses section constructing method |
-
2016
- 2016-03-22 CN CN201620224568.6U patent/CN205605215U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106703837A (en) * | 2017-01-02 | 2017-05-24 | 王玉田 | Collapse-preventing construction method for subway tunnels |
| CN108457658A (en) * | 2018-03-14 | 2018-08-28 | 济南城建集团有限公司 | A kind of texture stratum tunnel list hole bidirectional construction crosses section constructing method |
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