CN113047875B - Assembled independent arch sheathing structure of tunnel portal and installation method thereof - Google Patents
Assembled independent arch sheathing structure of tunnel portal and installation method thereof Download PDFInfo
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- CN113047875B CN113047875B CN202110279361.4A CN202110279361A CN113047875B CN 113047875 B CN113047875 B CN 113047875B CN 202110279361 A CN202110279361 A CN 202110279361A CN 113047875 B CN113047875 B CN 113047875B
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- arch
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- screw hole
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
- E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
- E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
- E21D11/183—Supporting means for arch members, not provided for in E21D11/22
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- Engineering & Computer Science (AREA)
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- Civil Engineering (AREA)
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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
An assembled independent arch sheathing structure of a tunnel portal and an installation method thereof comprise an arch sheathing foundation, a connecting sleeve arch section and a steel arch frame, wherein the arch sheathing foundations are symmetrically arranged in pairs, preferably, the arch sheathing structure at least comprises a pair of symmetrically arranged arch sheathing foundations, the steel arch frame is fixedly installed on the arch sheathing foundations, the installation of the connecting sleeve arch section is convenient to play a role in guiding and supporting through the arrangement of the steel arch frame, the connecting sleeve arch section is assembled in the steel arch frame, and is connected with the arch foundations to form an assembled arch sheathing.
Description
Technical Field
The invention belongs to the field of tunnel portal construction, and particularly relates to an assembled independent arch sheathing structure of a tunnel portal and an installation method thereof.
Background
With the deepening of the theoretical practice of 'two mountains' and the enhancement of the environmental protection concept, the 'zero excavation' tunnel entering process is increasingly adopted in the construction of highway tunnels. The process can damage vegetation to the minimum degree, meet the construction principle of 'early entry and late exit' of the tunnel, and achieve the effects of environmental protection, attractiveness and safety. However, under the condition of low and moderate slope shape, particularly when the height of a slope toe is lower than that of the arch crown of the sleeve, the conventional tunnel entering construction generally needs to dig a slope body firstly to form an upward slope with a certain height, and then the upward slope is tightly attached to the slope surface to construct the sleeve arch and the pipe shed. Therefore, under the conditions of the complex environment and the low and moderate slope land shape, a construction method for zero excavation cave entry needs to be adopted, in order to solve the problem that the sleeve arch cannot completely stick to the slope surface when the low and moderate slope land shape and the height of the slope toe are lower than the top of the sleeve arch, the construction method adopts independent sleeve arch, and the zero excavation cave entry can be realized in principle without excavating the slope body into an upward slope with a certain height and constructing the sleeve arch after reinforcing the upward slope.
An empty space section exists between the independent sleeve arch and the slope body, the common pipe shed forms an open pipe shed, and a prefabricated hidden hole is formed after concrete is poured in the empty space section. The prefabricated hidden tunnel consists of outer concrete layer and inner steel arch concrete.
The independent sleeve arch and the slope are integrated by pre-constructing the hidden hole, so that the stability of the sleeve arch is improved, and the slope is supported; meanwhile, the slope body is reinforced through pipe shed grouting, the stability of the slope body is further improved, safe tunneling can be realized under the conditions of shallow burying, bias pressure and small clear distance, the slope body does not need to be excavated to form an upward slope with enough height and then tunneled, and zero excavation tunneling is realized.
The independent cover arch in the construction method is of a cast-in-place concrete structure, a concrete template needs to be manufactured in advance, a pipe shed guide pipe needs to be placed, concrete is poured, main processes such as maintenance operation and the like occupy more labor and working hours, noise and dust generated in the construction process cause adverse effects on life of residents around a construction site, and the problems of claim and the like often occur.
Disclosure of Invention
In view of the above disadvantages, the technical problem to be solved by the present invention is to provide an assembled independent arch sheathing structure of a tunnel portal and an installation method thereof, which are used for improving the construction efficiency of independent arch sheathing.
In order to solve the technical problems, the invention adopts the technical scheme that,
the utility model provides an independent cover of assembled arch structure of tunnel portal, includes cover arch foundation, adapter sleeve arch section and steel bow member, and cover arch foundation sets up in pairs symmetry, and steel bow member fixed mounting is on cover arch foundation, and adapter sleeve arch section assembly is in the steel bow member, and adapter sleeve arch section is connected with cover arch foundation, forms assembled cover arch, and is preferred, includes the cover arch foundation that a pair of symmetry set up at least in this cover arch structure.
Furthermore, the steel arch frame comprises two channel steel frames and a positioning guide component, the front end face and the rear end face of the sleeve arch foundation are respectively fixedly provided with one channel steel frame, a subsection installation gap for installing a connecting sleeve arch section is formed between the two channel steel frames, the connecting sleeve arch section is installed in the subsection installation gap, and the positioning guide component is fixedly connected to the lower end of the channel steel frame.
Furthermore, the positioning guide assembly comprises a positioning guide plate and a bolt support, the positioning guide plate is fixedly connected to the lower end face of the channel steel frame, and the bolt support is fixedly connected to the lower end face of the positioning guide plate.
Furthermore, the positioning guide plate extends out of the channel steel frame, and the extending part of the positioning guide plate is located below the segmented installation gap.
Furthermore, bolt supports are uniformly arranged on the lower end faces of the positioning guide plates, and the bolt supports on the adjacent positioning guide plates are connected through support bolts.
Furthermore, a steel arch mounting groove is dug in the front end face and the rear end face of the cover arch foundation, a foundation penetrating hole is dug in the center of the steel arch mounting groove, and the steel arch is fixedly mounted in the steel arch mounting groove through the foundation penetrating hole.
Furthermore, a foundation connecting hole and a cover arch section connecting hole are dug in the channel steel frame, the foundation connecting hole is fixedly connected with the foundation penetrating hole through a bolt, and the cover arch section connecting holes are uniformly dug between the adjacent foundation connecting holes.
Furthermore, a connecting through hole is dug in the connecting sleeve arch section and is matched with the connecting hole of the connecting sleeve arch section.
Furthermore, a foundation connecting screw hole is dug in the sleeve arch foundation, a front end connecting screw hole and a rear end connecting screw hole are dug in the connecting sleeve arch section, the front end connecting screw hole and the rear end connecting screw hole are symmetrical about the central plane of the connecting sleeve arch section, and the foundation connecting screw hole is matched with the front end connecting screw hole or the rear end connecting screw hole.
The installation method of the assembled independent arch sheathing structure of the tunnel portal comprises the following steps,
(1) According to the assembled independent arch structure, all parts of the arch structure are prefabricated;
(2) When the ground foundation of the tunnel portal is poured, fixing the arch foundation to the ground foundation of the tunnel portal;
(3) Fixedly mounting a channel steel frame on the arch sheathing foundation, and welding a positioning guide assembly on the lower end surface of the channel steel frame;
(4) Hoisting the connecting sleeve arch section, and installing the connecting sleeve arch section;
(5) After each connecting sleeve arch section is installed in place, the adjacent foundation connecting screw hole, the front end connecting screw hole and the rear end connecting screw hole are connected through bolts.
The method has the advantages that the method is installed by adopting a field assembly type construction method, the original serial hole entering construction process is changed into parallel hole entering construction, the construction procedures of a concrete formwork and a concrete template are eliminated, the concrete curing time is saved, the construction efficiency can be greatly improved, and the influence and damage to the surrounding environment of a construction site can be reduced.
Drawings
FIG. 1 is a schematic view of a half-section structure of the present invention.
Fig. 2 is a structural schematic diagram of a set arch foundation.
Fig. 3 is a top view of the arch base.
FIG. 4 is a front view of the channel steel frame.
Fig. 5 is a top view of the present invention.
Reference numerals: the steel arch foundation comprises a cover arch foundation 1, a connecting sleeve arch section 2, a steel arch 3, a channel steel frame 4, a positioning guide assembly 5, a segmented installation gap 6, a positioning guide plate 7, a bolt support 8, a support bolt hole 9, a support bolt 10, a steel arch mounting groove 11, a foundation through hole 12, a foundation connecting hole 13, a cover arch section connecting hole 14, a connection through hole 15, a foundation connecting screw hole 16, a front end connecting screw hole 17, a rear end connecting screw hole 18, an installation hanging ring 19, a cover arch cast-in-place layer 20, bolts 21 and connecting bolts 22.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
The utility model provides an independent set of arch structure of assembled of tunnel portal, including set arch foundation 1, adapter sleeve arch section 2 and steel bow member 3, set arch foundation 1 sets up to the symmetry, it is preferred, at least, including a set arch foundation 1 that a pair of symmetry set up in this set arch structure, steel bow member 3 fixed mounting is on set arch foundation 1, through the setting of steel bow member 3, be convenient for play direction and supporting role to the installation of adapter sleeve arch section 2, adapter sleeve arch section 2 assembles in steel bow member 3, adapter sleeve arch section 2 is connected with set arch foundation 1, form assembled set arch, adopt on-the-spot assembled construction method installation, it advances the hole construction to change into parallel with original serial-type entering hole work progress, the construction process of concrete die carrier and template has been cancelled, save concrete maintenance time, can improve the efficiency of construction greatly, also can reduce simultaneously to building site surrounding environment influence and destruction.
Steel bow member 3 includes two pin channel-section steel framves 4 and location direction subassembly 5, each fixed mounting has a pin channel-section steel frame 4 on the front and back terminal surface of cover arch basis 1, form the segmentation installation clearance 6 of installation adapter sleeve arch section 2 between two pin channel-section steel frames 4, adapter sleeve arch section 2 is installed in segmentation installation clearance 6, location direction subassembly 5 fixed connection is at the lower extreme of channel-section steel frame 4, setting through location direction subassembly 5, be convenient for fix a position the installation to adapter sleeve arch section 2 on the one hand, on the other hand is convenient for carry out fixed connection to adjacent channel-section steel frame 4, make steel bow member 3 and assembled cover encircle to constitute a stable domes assembly jointly, keep the overall stability and the rigidity of cover arch jointly, provide reliable support assurance for the subsequent segmentation assembly of cover arch.
The positioning guide assembly 5 comprises a positioning guide plate 7 and a bolt support 8, the positioning guide plate 7 is fixedly connected to the lower end face of the channel steel frame 4, the bolt support 8 is uniformly and fixedly connected to the lower end face of the positioning guide plate 7, preferably, a support bolt hole 9 is formed in the bolt support 8 in an excavating mode, a support bolt 10 is installed in the support bolt hole 9, the adjacent channel steel frame 4 is fixedly connected through the support bolt 10, and the rigidity and the stability of the steel arch frame 3 are improved conveniently.
The part of the positioning guide plate 7 extends out of the channel steel frame 4, the extending part of the positioning guide plate 7 is located below the subsection installation gap 6, and through the arrangement of the positioning guide plate 7, the positioning and guiding effect on the connecting sleeve arch section 2 is facilitated, the efficiency of installation work is improved, the subsection falling can be prevented, and the safety in the installation process is ensured.
Dig on the terminal surface around cover arch basis 1 and be equipped with steel bow member mounting groove 11, the central point of bow member mounting groove 11 puts to go up to dig and is equipped with basic wearing to establish hole 12, and steel bow member 3 is worn to establish hole 12 fixed mounting in steel bow member mounting groove 11 through the basis, through the setting of steel bow member mounting groove 11, is convenient for carry out the location installation to steel bow member 3, improves the efficiency and the installation accuracy of installation work.
A foundation connecting hole 13 and a cover arch section connecting hole 14 are dug in the channel steel frame 4, the foundation connecting hole 13 is fixedly connected with the foundation penetrating hole 12 through a bolt 21, so that the steel arch 3 and the cover arch foundation 1 are fixedly connected conveniently, the cover arch section connecting holes 14 are uniformly dug between the adjacent foundation connecting holes 13, and the cover arch section connecting holes 14 are used for penetrating steel pipes.
The connecting through holes 15 are dug in the connecting sleeve arch section 2, the connecting through holes 15 are matched with the connecting holes 14 of the connecting sleeve arch section, so that a steel pipe can conveniently penetrate through the sleeve arch structure, the strength of the independent sleeve arch structure is improved, and the positioning and the installation of the connecting sleeve arch section 2 and the steel arch frame 3 are realized.
A foundation connecting screw hole 16 is dug in the arch base 1, a front end connecting screw hole 17 and a rear end connecting screw hole 18 are dug in the arch section 2 of the connecting sleeve, the front end connecting screw hole 17 and the rear end connecting screw hole 18 are symmetrical about the central plane of the arch section 2 of the connecting sleeve, the foundation connecting screw hole 16 is matched with the front end connecting screw hole 17 or the rear end connecting screw hole 18, in the installation process, the foundation connecting screw hole 16 is fixedly connected with the front end connecting screw hole 17 or the rear end connecting screw hole 18 through a connecting bolt 22, the connecting strength of the arch base 1 and the arch section 2 of the connecting sleeve is further enhanced, adjacent arch sections 2 of the connecting sleeve are connected through the front end connecting screw hole 17 and the rear end connecting screw hole 18, and the connecting strength of the adjacent arch sections 2 of the connecting sleeve is enhanced.
In some preferred modes, the diameters of the foundation through holes 12, the foundation connecting holes 13, the arch section sleeving connecting holes 14 and the connecting through holes 15 are consistent, so that the production of each part is facilitated, and the convenience of later installation of each part is improved.
In some preferred modes, fixedly connected with installation rings 19 on the up end of connecting sleeve arch section 2, through the setting of installation rings 19, be convenient for hoist connecting sleeve arch section 2.
In some preferred modes, the foundation connecting screw hole 16, the front end connecting screw hole 17 and the rear end connecting screw hole 18 are all in a semi-circular arc shape and form a complete circular arc shape after being spliced, so that the connecting bolt 22 can be conveniently installed in the circular arc-shaped screw hole, and the radian of the circular arc-shaped screw hole is preferably smaller than that of the sleeve arch structure, so that adjacent sleeve arch units can be conveniently connected.
In some preferred modes, the ground of the opening is cast in place before construction to form a cover arch cast-in-place layer 20, in the cast-in-place process, an embedded groove of a cover arch foundation 1 is preset, the cover arch foundation is embedded in the embedded groove, and plain concrete is filled and fixed.
The installation method of the assembled independent arch sheathing structure of the tunnel portal comprises the following steps,
(1) According to the assembled independent set of arch structure, prefabricating each part of the set of arch structure;
(2) When the ground foundation of the tunnel portal is poured, fixing the arch foundation to the ground foundation of the tunnel portal;
(3) Fixedly mounting a channel steel frame on the arch sheathing foundation, and welding a positioning guide assembly on the lower end surface of the channel steel frame;
(4) Hoisting the connecting sleeve arch section, and installing the connecting sleeve arch section;
(5) After each connecting sleeve arch section is installed in place, the adjacent foundation connecting screw hole, the front end connecting screw hole and the rear end connecting screw hole are connected through bolts.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention; thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Although the terms corresponding to the reference numerals in the figures are used more herein, the possibility of using other terms is not excluded; these terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to the spirit of the present invention.
Claims (7)
1. An assembled independent arch sleeving structure of a tunnel portal is characterized by comprising an arch sleeving foundation (1), connecting sleeve arch sections (2) and steel arches (3), wherein the arch sleeving foundations (1) are symmetrically arranged in pairs, the steel arches (3) are fixedly installed on the arch sleeving foundations (1), the connecting sleeve arch sections (2) are assembled in the steel arches (3), and the connecting sleeve arch sections (2) are connected with the arch sleeving foundations (1) to form an assembled arch sleeving;
the steel arch frame (3) comprises two channel steel frames (4) and a positioning guide component (5), one channel steel frame (4) is fixedly mounted on each of the front end surface and the rear end surface of the arch base (1), a subsection mounting gap (6) for mounting the connecting sleeve arch section (2) is formed between the two channel steel frames (4), the connecting sleeve arch section (2) is mounted in the subsection mounting gap (6), and the positioning guide component (5) is fixedly connected to the lower end of each channel steel frame (4);
the positioning guide assembly (5) comprises a positioning guide plate (7) and a bolt support (8), the positioning guide plate (7) is fixedly connected to the lower end face of the channel steel frame (4), the bolt support (8) is fixedly connected to the lower end face of the positioning guide plate (7), and the bolt supports (8) of adjacent steel arches (3) are fixedly connected through support bolts (10).
2. An assembled individual shell arch structure of a tunnel portal according to claim 1, characterized in that the positioning guide plate (7) partly protrudes out of the channel steel frame (4), the protruding part of the positioning guide plate (7) being located below the sectional mounting gap (6).
3. An assembled independent arch sheathing structure of a tunnel portal according to claim 1, wherein bolt supports (8) are uniformly installed on the lower end surfaces of the positioning guide plates (7), and the bolt supports (8) on adjacent positioning guide plates (7) are connected by support bolts (10).
4. A tunnel portal assembled independent arch structure according to claim 1, wherein the arch foundation (1) is provided with steel arch installing grooves (11) dug on the front and rear end faces thereof, the steel arch installing grooves (11) are provided with foundation through holes (12) dug in the center positions thereof, and the steel arch (3) is fixedly installed in the steel arch installing grooves (11) through the foundation through holes (12).
5. The assembled independent arch sheathing structure of the tunnel portal according to claim 4, wherein the channel steel frame (4) is internally dug with foundation connection holes (13) and arch sheathing section connection holes (14), the foundation connection holes (13) are fixedly connected with the foundation through holes (12) through bolts (21), and the arch sheathing section connection holes (14) are uniformly dug between the adjacent foundation connection holes (13).
6. An assembled independent arch sheathing structure of a tunnel portal according to claim 5, wherein the connecting arch segments (2) are internally dug with connecting through holes (15), and the connecting through holes (15) are matched with the connecting holes (14) of the connecting arch segments.
7. The assembled independent arch sheathing structure of a tunnel portal according to claim 1, wherein a foundation connection screw hole (16) is dug in the arch sheathing foundation (1), a front end connection screw hole (17) and a rear end connection screw hole (18) are dug in the arch sheathing section (2), the front end connection screw hole (17) and the rear end connection screw hole (18) are symmetrical with respect to a center plane of the arch sheathing section (2), and the foundation connection screw hole (16) is fitted to the front end connection screw hole (17) or the rear end connection screw hole (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110279361.4A CN113047875B (en) | 2021-03-16 | 2021-03-16 | Assembled independent arch sheathing structure of tunnel portal and installation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110279361.4A CN113047875B (en) | 2021-03-16 | 2021-03-16 | Assembled independent arch sheathing structure of tunnel portal and installation method thereof |
Publications (2)
| Publication Number | Publication Date |
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| CN113047875A CN113047875A (en) | 2021-06-29 |
| CN113047875B true CN113047875B (en) | 2023-04-14 |
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| CN202110279361.4A Active CN113047875B (en) | 2021-03-16 | 2021-03-16 | Assembled independent arch sheathing structure of tunnel portal and installation method thereof |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103410528B (en) * | 2013-08-29 | 2015-07-15 | 中南大学 | Tunnel lining structure and construction method |
| JP6230557B2 (en) * | 2015-02-16 | 2017-11-15 | ジオスター株式会社 | Joining method |
| CN107893383A (en) * | 2017-12-28 | 2018-04-10 | 中交二公局第四工程有限公司 | One kind assembling installing type concrete culvert |
| CN212054725U (en) * | 2019-12-11 | 2020-12-01 | 湖北省路桥集团有限公司 | Cast-in-place reinforced concrete arch-covering formwork system |
| CN111425217A (en) * | 2020-04-29 | 2020-07-17 | 四川省交通勘察设计研究院有限公司 | Reusable assembled type arch sheathing structure and construction method thereof |
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