CN207229131U - A kind of precipitous broken formation tunnel portal section supporting construction - Google Patents

A kind of precipitous broken formation tunnel portal section supporting construction Download PDF

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Publication number
CN207229131U
CN207229131U CN201720975838.1U CN201720975838U CN207229131U CN 207229131 U CN207229131 U CN 207229131U CN 201720975838 U CN201720975838 U CN 201720975838U CN 207229131 U CN207229131 U CN 207229131U
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China
Prior art keywords
anchor tube
steel arch
shelfs
supporting construction
fixing piece
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CN201720975838.1U
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Inventor
文博
李丹
张孙文
邱朋
李波
李鑫
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CCCC First Harbor Engineering Co Ltd
CCCC Third Harbor Engineering Co Ltd
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CCCC First Harbor Engineering Co Ltd
CCCC Third Harbor Engineering Co Ltd
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Abstract

It the utility model is related to the realm of building construction, and in particular to precipitous broken formation tunnel portal section supporting construction.Propose a kind of precipitous broken formation tunnel portal section supporting construction, including set arch, Guan Peng and along the spaced more Pin steel arch-shelfs in tunnel direction, steel arch-shelf is fixed in top bar, horizontal fixing piece is welded between adjacent two Pin steel arch-shelfs, slanting grouting anchor tube is provided among adjacent two Pin steel arch-shelfs, horizontal fixing piece is close in the upper end of grouting anchor tube, and is welded and fixed by connector and horizontal fixing piece, and the lower end for the anchor tube that is in the milk is fixed on country rock deep.The utility model between adjacent steel arch-shelf by setting oblique grouting anchor tube, so that preliminary bracing pressure from surrounding rock delivers load to grouting anchor tube by the horizontal fixing piece between adjacent steel arch-shelf, adjacent two Pin steel arch-shelfs are anchored in country rock deep by the anchor tube that is in the milk at the same time, are effectively guaranteed the stabilization of tunnel portal segment structure.

Description

A kind of precipitous broken formation tunnel portal section supporting construction
Technical field
It the utility model is related to the realm of building construction, and in particular to precipitous broken formation tunnel portal section supporting construction.
Background technology
Precipitous broken formation tunnel portal section slope stability is to ensure the important indicator of safety for tunnel engineering and quality.Press Three conventional step tunnel excavation construction methods, although all applying lock foot anchoring stock at step(Pipe)Come deformation controlling for rock surrounding gateways and guarantor When demonstrate,proving supporting construction to stablize, but meeting precipitous broken formation wall rock condition, often due to tunnel portal section occurs in controling power deficiency How the problems such as supporting construction slides, surrouding rock deformation is excessive, ensure that the stabilization of construction safety and hole segment structure is one at this time The Important Problems to be solved.
Utility model content
In order to solve the shortcoming in above-mentioned background technology, there is provided a kind of precipitous broken formation tunnel portal section supporting knot Structure, can effectively prevent supporting construction sliding and surrouding rock deformation in tunnel portal section work progress, improve the safety of construction The stability of property and structure.
To achieve the above object, the technical solution adopted in the utility model is:Propose a kind of precipitous broken formation tunnel Portal Section supporting construction, including set arch, Guan Peng and along the spaced more Pin steel arch-shelfs in tunnel direction, steel arch-shelf, which is fixed on, appears on the stage On rank, horizontal fixing piece is welded between adjacent two Pin steel arch-shelfs, slanting grouting anchor is provided among adjacent two Pin steel arch-shelfs Pipe, horizontal fixing piece is close in the upper end for the anchor tube that is in the milk, and is welded and fixed by connector and horizontal fixing piece, is in the milk under anchor tube End is fixed on country rock deep.
The grouting anchor tube is arranged on the arranged on left and right sides of steel arch-shelf, and the upper end is apart from the vertical range of top bar footing 0.2~1.5m.
The grouting anchor tube and the angle of horizontal direction are 10~45 °, the angle of horizontal fixing piece and vertical direction and filling It is identical with the angle of horizontal direction to starch anchor tube.
The steel arch-shelf is made of I-steel, and horizontal fixing piece is channel steel, and the both ends of horizontal fixing piece are respectively welded admittedly It is scheduled on the web of adjacent two Pin steel arch-shelfs, connector is steel plate.
The grouting anchor tube is 89~108mm of diameter, the steel pipe of 5~8m of length.
The utility model between adjacent steel arch-shelf by setting oblique grouting anchor tube so that preliminary bracing pressure from surrounding rock is led to The transverse channel steels crossed between adjacent steel arch-shelf deliver load to grouting anchor tube, while steel arch-shelf is anchored in country rock by the anchor tube that is in the milk Deep, is effectively guaranteed the stabilization of tunnel portal segment structure.Portal Section supporting knot can effectively be controlled using the utility model The deformation of structure, ensures the stabilization of precipitous broken formation tunnel portal section supporting construction.
Brief description of the drawings
Fig. 1 is the overall structure diagram of the utility model;
Fig. 2 is the attachment structure schematic diagram of the utility model grouting anchor tube and steel arch-shelf;
Fig. 3 is the elevation of Fig. 2;
Fig. 4 is the front view of Fig. 2;
In figure:1- is in the milk anchor tube, 2- junction steel plates, and 3,4- steel arch-shelfs, 5- channel steels, 6- gunite concretes, 7- pipe canopies, 8- sets Arch.
Embodiment
The utility model is further illustrated below in conjunction with the accompanying drawings, but the utility model is not limited to specific embodiment.
Embodiment 1:
A kind of precipitous broken formation tunnel portal section supporting construction as shown in Figs 1-4, including grouting anchor tube 1, connection steel Plate 2, along the spaced more Pin steel arch-shelfs in tunnel direction, channel steel 5, set arch 8 and pipe canopy 7.Beaten among adjacent two Pin steel arch-shelfs 3,4 If it is in the milk anchor tube 1;Channel steel 5 is welded on the web of adjacent two Pin steel arch-shelfs 3,4, and channel steel 5 is close in the upper end of grouting anchor tube 1, and The grouting weldering of anchor tube 1 is connected on channel steel 5 by junction steel plate 2, the lower end of grouting anchor tube 1 is fixed on country rock deep.
The supporting junction structure to apply method as follows:Set arch 8 is first applied during precipitous broken formation tunnel, is applied after hardening Make pipe canopy 7;After the completion of set arch 8, pipe canopy 7 are constructed, top bar excavation is carried out, erects top bar steel arch-shelf;Then in top bar Grouting anchor tube 1 is set more than footing, among two Pin steel arch-shelfs;Channel steel 5 is adjacent to 1 upside of grouting anchor tube and is welded in two Pin steel arch-shelfs 3 and steel arch-shelf 4 web on;Grouting anchor tube 1 is welded on channel steel 5 with junction steel plate 2;Finally carry out extension bar-mat reinforcement, injection Concrete 6 is constructed.
Embodiment 2:
A kind of precipitous broken formation tunnel portal section supporting construction as shown in Figs 1-4, including grouting anchor tube 1, connection steel Plate 2, along the spaced more Pin steel arch-shelfs in tunnel direction, channel steel 5, set arch 8 and pipe canopy 7.Beaten among adjacent two Pin steel arch-shelfs 3,4 If it is in the milk anchor tube 1;Channel steel 5 is welded on the web of adjacent two Pin steel arch-shelfs 3,4, and channel steel 5 is close in the upper end of grouting anchor tube 1, and The grouting weldering of anchor tube 1 is connected on channel steel 5 by junction steel plate 2, the lower end of grouting anchor tube 1 is fixed on country rock deep.
Concrete methods of realizing in Practical Project is:Set arch 8 is first applied during precipitous broken formation tunnel, is applied after hardening Make 108 pipe canopies 7 of φ;After the completion of set arch 8, pipe canopy 7 are constructed, top bar excavation is carried out, erects I 22a steel arch-shelfs of top bar;Then At top bar footing above 1m height, diameter phi 89, length 8m, oblique 15 ° of grouting anchor tube are set among two Pin steel arch-shelfs 1;By [14a channel steels 5 are adjacent to 1 upside of grouting anchor tube and are welded on the web of adjacent two Pin steel arch-shelfs, for the anchor tube that meets and be in the milk The big effect of 1 closely connected, contact area, channel steel 5 are 15 ° with vertical direction drift angle;With the thick width 150mm × 300mm's high of 10mm Grouting anchor tube 1 is welded on channel steel 5 by junction steel plate 2;Finally carry out extension bar-mat reinforcement, gunite concrete 6 is constructed.
The operation principle of this practicality is:Highly locate away from top bar bottom 1m, set between adjacent two Pin steel arch-shelfs straight Footpath φ 89, length 8m, oblique 15 ° of grouting anchor tube, are close to the web that channel steel is welded on to two steel arch-shelfs on the upside of grouting anchor tube On, grouting anchor tube end is welded on junction steel plate and channel steel.Hole supporting construction is subject to by setting long grouting anchor tube Load is delivered to country rock deep, improves the locking ability to hole supporting construction, also strengthens country rock, can effectively prevent tunnel Road Portal Section supporting construction and surrounding slopes slide, while the common stress of steel arch-shelf of be in the milk anchor tube and both sides, connector Existing globality, power transmission is clear and definite, and ultimate bearing capacity is also improved.

Claims (5)

1. a kind of precipitous broken formation tunnel portal section supporting construction, including set arch, Guan Peng and spaced along tunnel direction More Pin steel arch-shelfs, steel arch-shelf are fixed in top bar, it is characterised in that:Horizontal fixation is welded between adjacent two Pin steel arch-shelfs Part, is provided with slanting grouting anchor tube among adjacent two Pin steel arch-shelfs, horizontal fixing piece is close in the upper end for the anchor tube that is in the milk, and passes through Connector is welded and fixed with horizontal fixing piece, and the lower end for the anchor tube that is in the milk is fixed on country rock deep.
A kind of 2. precipitous broken formation tunnel portal section supporting construction according to claim 1, it is characterised in that:The filling Slurry anchor tube is arranged on the arranged on left and right sides of steel arch-shelf, and the upper end is 0.2~1.5m apart from the vertical range of top bar footing.
A kind of 3. precipitous broken formation tunnel portal section supporting construction according to claim 1, it is characterised in that:The filling The angle for starching anchor tube and horizontal direction is 10~45 °, the angle and grouting anchor tube of horizontal fixing piece and vertical direction and level side To angle it is identical.
4. according to a kind of any precipitous broken formation tunnel portal section supporting construction of claim 1-3, it is characterised in that: The steel arch-shelf is made of I-steel, and horizontal fixing piece is channel steel, the both ends of horizontal fixing piece be respectively welded be fixed on it is adjacent On the web of two Pin steel arch-shelfs, connector is steel plate.
5. according to a kind of any precipitous broken formation tunnel portal section supporting construction of claim 1-3, it is characterised in that: The grouting anchor tube is 89~108mm of diameter, the steel pipe of 5~8m of length.
CN201720975838.1U 2017-08-07 2017-08-07 A kind of precipitous broken formation tunnel portal section supporting construction Active CN207229131U (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108678771A (en) * 2018-07-15 2018-10-19 中铁二十局集团有限公司 Pass through fault belt Tunnel and median septum strengthening supporting system
CN110985057A (en) * 2019-12-25 2020-04-10 云南交投公路建设第四工程有限公司 Construction method for tunneling hidden excavation and hole entering under combined advanced support of cover beam and pipe shed
CN111058873A (en) * 2020-01-15 2020-04-24 中国石油大学(华东) Primary support part supporting device and method for weak surrounding rock large-section tunnel
CN112031814A (en) * 2020-09-17 2020-12-04 攀钢集团工程技术有限公司 Cave-entering construction method for crossing shallow-layer high-load highway
CN114075989A (en) * 2020-08-17 2022-02-22 李信斌 Support equipment
CN114075988A (en) * 2020-08-17 2022-02-22 李信斌 Support equipment

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108678771A (en) * 2018-07-15 2018-10-19 中铁二十局集团有限公司 Pass through fault belt Tunnel and median septum strengthening supporting system
CN110985057A (en) * 2019-12-25 2020-04-10 云南交投公路建设第四工程有限公司 Construction method for tunneling hidden excavation and hole entering under combined advanced support of cover beam and pipe shed
CN111058873A (en) * 2020-01-15 2020-04-24 中国石油大学(华东) Primary support part supporting device and method for weak surrounding rock large-section tunnel
CN111058873B (en) * 2020-01-15 2021-07-13 中国石油大学(华东) Primary support part supporting device and method for weak surrounding rock large-section tunnel
CN114075989A (en) * 2020-08-17 2022-02-22 李信斌 Support equipment
CN114075988A (en) * 2020-08-17 2022-02-22 李信斌 Support equipment
CN114075989B (en) * 2020-08-17 2024-03-26 李信斌 Supporting equipment
CN114075988B (en) * 2020-08-17 2024-03-29 李信斌 Supporting equipment
CN112031814A (en) * 2020-09-17 2020-12-04 攀钢集团工程技术有限公司 Cave-entering construction method for crossing shallow-layer high-load highway

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