CN205445635U - Shaped steel bow member supporting construction of tunnel excavation in -process - Google Patents
Shaped steel bow member supporting construction of tunnel excavation in -process Download PDFInfo
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- CN205445635U CN205445635U CN201620251420.1U CN201620251420U CN205445635U CN 205445635 U CN205445635 U CN 205445635U CN 201620251420 U CN201620251420 U CN 201620251420U CN 205445635 U CN205445635 U CN 205445635U
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- shaped steel
- bow member
- tunnel
- steel arch
- supporting construction
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Abstract
The utility model discloses a shaped steel bow member supporting construction of tunnel excavation in -process, shaped steel bow member supporting construction is used for strutting city gate hole type section tunnel, and the inlayer concrete is spouted at the lateral wall and the top of tunnel, sets up city gate hole type shaped steel bow member with following tunnel longitudinal separation, city gate hole type shaped steel bow member is including encircleing arching top and bow member straight flange, the department of bending of encircleing arching top and bow member straight flange is for encircleing the arching shoulder, and take on and the middle part department of bow member straight flange pours continuous locking roof beam at hunch arching, locking roof beam parcel firmly encircles the middle part of arching shoulder and bow member straight flange and vertically fuses every pin shaped steel bow member along the tunnel. The utility model provides a shaped steel bow member supporting construction is simple, safe and reliable, construction convenience, cheap cost, and can reduce surrouding rock deformation effectively and guarantee construction safety.
Description
Technical field
This utility model relates to the shaped steel arch supporting construction during a kind of tunnel excavation, be applicable to the tunnel excavation support technology of wide spectrum, be particularly suited for that surrounding rock stability is poor, deform bigger tunnel excavation after excavation during need the situation that uses many Pin shaped steel arch to carry out preliminary bracing.
Background technology
During the Tunnel excavation of wide spectrum, run into the situation of rock stability difference, it will usually use many Pin shaped steel arch as preliminary bracing structure.In current many Pin shaped steel arch support structure design, account for by single Pin stress condition, often typically use reinforcement welding between Pin shaped steel arch with forward and backward shaped steel arch or do not weld, lack stronger attachment structure, it is impossible to give full play to the supporting intensity of many Pin shaped steel arch coaction, shaped steel arch less stable, in the case of surrouding rock deformation is relatively big, easily cause shaped steel arch generation excessive deformation and surrender, it is impossible to effectively reduce surrouding rock deformation, construction safety outstanding problem.
Summary of the invention
The purpose of this utility model is, for present on problem, it is provided that the shaped steel arch supporting construction during a kind of tunnel excavation.
To this end, this utility model following solution of employing:
A kind of shaped steel arch supporting construction during tunnel excavation, described shaped steel arch supporting construction is used for supporting gateway opening type section tunnel, layer concrete in the sidewall of tunnel and top spray, along tunnel longitudinally spaced gateway opening type shaped steel arch is set, described gateway opening type shaped steel arch includes arch-rack top and bow member straight flange, the bending part of described arch-rack top and bow member straight flange is bow member spandrel, center at bow member spandrel and bow member straight flange pours continuous print locking beam, described locking beam wraps bow member spandrel and the middle part of bow member straight flange and is longitudinally connected by every Pin shaped steel arch along tunnel.
Preferably, the cross section of locking beam uses the size meeting Structural strength calls.
Preferably, between described locking beam and rock, prestressed anchor is set.
Preferably, described prestressed anchor exposes outside the termination of rock and uses Welding Structure to be connected with shaped steel arch.
Preferably, enter the rock degree of depth and the anchorage length of described prestressed anchor uses and meets the size that tensile strength requires.
This utility model provides the shaped steel arch supporting construction during a kind of tunnel excavation, after excavation is planned to build tunnel and is completed many Pin shaped steel arch supporting construction, spandrel and the middle part pouring reinforcement concrete locking beam of bow member straight flange at every Pin shaped steel arch, described armored concrete locking beam is continuous print, cross dimensions is less, and the tunnel lining concrete etc. not affecting subsequent implementation is constructed, four locking beams of continuous placing and the shaped steel arch for supporting gateway opening type section tunnel together form stable supporting construction, improve the supporting stability of shaped steel arch supporting construction；Described shaped steel arch supporting construction is simple, safe and reliable, easy construction, low cost, and can effectively reduce surrouding rock deformation and ensure construction safety.
Accompanying drawing explanation
Fig. 1 is the optimal crosssection figure of shaped steel arch supporting construction during tunnel excavation provided by the utility model；
Fig. 2 is the facade layout drawing of shaped steel arch supporting construction during tunnel excavation provided by the utility model；
In figure: 1-arch-rack top；2-bow member straight flange；The middle part of 21-bow member straight flange；3-bow member spandrel；4-armored concrete locking beam；5-rock；6-prestressed anchor.
Detailed description of the invention
With specific embodiment, this utility model is described in further detail referring to the drawings.
During the tunnel excavation that surrounding rock stability is poor, use many Pin shaped steel arch as preliminary bracing structure, need to improve the stability of single Pin shaped steel arch.As shown in Figure 1 and Figure 2, after excavation is planned to build tunnel and is completed many Pin shaped steel arch supporting construction, every Pin shaped steel arch includes arch-rack top 1 and bow member straight flange 2, the bending part of arch-rack top 1 and bow member straight flange 2 is bow member spandrel 3, continuous print armored concrete locking beam 4 is all poured at the middle part 21 of bow member spandrel 3 and bow member straight flange, the middle part 21 of every Pin shaped steel arch spandrel 3 and bow member straight flange is wrapped by armored concrete locking beam 4 respectively, arranges prestressed anchor 6 between armored concrete locking beam 4 and rock 5.
Armored concrete locking beam 4 is to pour along being longitudinally continuous of tunnel, and its cross section should use less size when meeting structural strength, and the tunnel lining concrete etc. not affecting subsequent implementation is constructed.
The concrete construction method of the present embodiment is as follows:
1) excavation is planned to build tunnel and completes many Pin shaped steel arch supporting construction；
2) holing in pressing close to the rock 5 at middle part 21 of the spandrel 3 of every Pin shaped steel arch, bow member straight flange, prestressed anchor 6 of constructing, the termination of exposing of prestressed anchor 6 is welded with shaped steel arch；
3) pour continuous print armored concrete locking beam 4 at the position arranging prestressed anchor 6, and longitudinally every Pin shaped steel arch is connected along tunnel.
Above-mentioned detailed description of the invention is used for illustrating this utility model; it is only preferred embodiment of the present utility model; rather than this utility model is limited; in spirit of the present utility model and scope of the claims; the any modification, equivalent substitution and improvement etc. making this utility model, both fall within protection domain of the present utility model.
Claims (5)
1. the shaped steel arch supporting construction during a tunnel excavation, it is characterized in that, described shaped steel arch supporting construction is used for supporting gateway opening type section tunnel, layer concrete in the sidewall of tunnel and top spray, along tunnel longitudinally spaced gateway opening type shaped steel arch is set, described gateway opening type shaped steel arch includes arch-rack top and bow member straight flange, the bending part of described arch-rack top and bow member straight flange is bow member spandrel, center at bow member spandrel and bow member straight flange pours continuous print locking beam, described locking beam wraps bow member spandrel and the middle part of bow member straight flange and is longitudinally connected by every Pin shaped steel arch along tunnel.
2. according to the shaped steel arch supporting construction during a kind of tunnel excavation described in claim 1, it is characterised in that the cross section of locking beam uses the size meeting Structural strength calls.
3. according to the shaped steel arch supporting construction during a kind of tunnel excavation described in claim 1, it is characterised in that arrange prestressed anchor between described locking beam and rock.
4. according to the shaped steel arch supporting construction during a kind of tunnel excavation described in claim 3, it is characterised in that described prestressed anchor exposes outside the termination of rock and uses Welding Structure to be connected with shaped steel arch.
5. according to the shaped steel arch supporting construction during a kind of tunnel excavation described in claim 3, it is characterised in that enter the rock degree of depth and the anchorage length of described prestressed anchor use and meet the size that tensile strength requires.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620251420.1U CN205445635U (en) | 2016-03-29 | 2016-03-29 | Shaped steel bow member supporting construction of tunnel excavation in -process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620251420.1U CN205445635U (en) | 2016-03-29 | 2016-03-29 | Shaped steel bow member supporting construction of tunnel excavation in -process |
Publications (1)
| Publication Number | Publication Date |
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| CN205445635U true CN205445635U (en) | 2016-08-10 |
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| CN201620251420.1U Active CN205445635U (en) | 2016-03-29 | 2016-03-29 | Shaped steel bow member supporting construction of tunnel excavation in -process |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106593484A (en) * | 2016-12-28 | 2017-04-26 | 中铁第四勘察设计院集团有限公司 | Sectional steel frame welding-free support structure for tunnel primary support construction |
| CN106593485A (en) * | 2016-12-28 | 2017-04-26 | 中铁第四勘察设计院集团有限公司 | Sectional steel frame welding-free fast assembly support structure for tunnel primary support construction |
| CN107653848A (en) * | 2017-09-12 | 2018-02-02 | 中国葛洲坝集团基础工程有限公司 | A kind of attached cavern excavation supporting construction of sand gravel layer tunnel and its construction method |
| CN110566242A (en) * | 2019-08-21 | 2019-12-13 | 义煤集团宜阳义络煤业有限责任公司 | control method for surrounding rock of top coal roadway of large-inclination soft thick coal seam |
| CN112576277A (en) * | 2020-12-11 | 2021-03-30 | 南昌工程学院 | Spatial combined supporting structure for shallow-buried bias section of opening and construction method |
-
2016
- 2016-03-29 CN CN201620251420.1U patent/CN205445635U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106593484A (en) * | 2016-12-28 | 2017-04-26 | 中铁第四勘察设计院集团有限公司 | Sectional steel frame welding-free support structure for tunnel primary support construction |
| CN106593485A (en) * | 2016-12-28 | 2017-04-26 | 中铁第四勘察设计院集团有限公司 | Sectional steel frame welding-free fast assembly support structure for tunnel primary support construction |
| CN106593485B (en) * | 2016-12-28 | 2019-02-05 | 中铁第四勘察设计院集团有限公司 | It is a kind of at the beginning of tunnel branch construct profile steel frame exempt from weld quick assembling supporting construction |
| CN106593484B (en) * | 2016-12-28 | 2019-02-05 | 中铁第四勘察设计院集团有限公司 | It is a kind of at the beginning of tunnel branch construct profile steel frame exempt from weld supporting construction |
| CN107653848A (en) * | 2017-09-12 | 2018-02-02 | 中国葛洲坝集团基础工程有限公司 | A kind of attached cavern excavation supporting construction of sand gravel layer tunnel and its construction method |
| CN107653848B (en) * | 2017-09-12 | 2019-04-09 | 中国葛洲坝集团基础工程有限公司 | A kind of attached cavern excavation support construction of sand gravel layer tunnel and its construction method |
| CN110566242A (en) * | 2019-08-21 | 2019-12-13 | 义煤集团宜阳义络煤业有限责任公司 | control method for surrounding rock of top coal roadway of large-inclination soft thick coal seam |
| CN112576277A (en) * | 2020-12-11 | 2021-03-30 | 南昌工程学院 | Spatial combined supporting structure for shallow-buried bias section of opening and construction method |
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