CN203685217U - Initial-stage supporting steel frame of large-section weak-surrounding-rock tunnel - Google Patents
Initial-stage supporting steel frame of large-section weak-surrounding-rock tunnel Download PDFInfo
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- CN203685217U CN203685217U CN201320873335.5U CN201320873335U CN203685217U CN 203685217 U CN203685217 U CN 203685217U CN 201320873335 U CN201320873335 U CN 201320873335U CN 203685217 U CN203685217 U CN 203685217U
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Abstract
The utility model relates to the field of initial-stage tunnel supporting, in particular to an initial-stage supporting steel frame of a large-section weak-surrounding-rock tunnel, solving the problems that as an existing grid steel frame is formed by combining four main reinforcing steel bars and auxiliary stirrups, the early-stage strength and rigidity are insufficient. The initial-stage supporting steel frame comprises an upper guide steel grid, middle guide steel grids, lower guide steel grids and an inverted-arch steel grid, wherein the upper guide steel grid, the middle guide steel grids, the lower guide steel grids and the inverted-arch steel grid are respectively formed by six longitudinal main reinforcing steel bars, the stirrups fixedly arranged on the external periphery of the longitudinal main reinforcing steel bars, and constructional reinforcements welded between the adjacent longitudinal main reinforcing steel bars; the constructional reinforcements adopt 8-shaped steel frames and X-shaped steel frames, which are arranged at intervals; the adjacent steel grids are connected by corresponding joints A, joints B, joints C and joints D. According to the initial-stage supporting steel frame, not only can the close adhesion with sprayed concrete be realized, but also the initial-stage supporting steel frame of the large-section weak-surrounding-rock tunnel can be provided with higher strength and rigidity, in particular to early-stage strength and early-stage rigidity; due to simple structure, rational design and simplicity in manufacturing, the popularization is easy.
Description
Technical field
The utility model relates to Tunnel field, is specially a kind of large cross-section weak surrounding rock tunnel preliminary bracing steelframe.
Background technology
Composite lining tunnel is general adopts the preliminary bracing being made up of grid steel frame or profile steel frame and anchor pole, pneumatically placed concrete to resist the distortion of weak surrounding rock after tunnel excavation.At present, mostly conventional grid steel frame is that being aided with a certain amount of stirrup by 4 main reinforcements combines.Compared with profile steel frame, grid steel frame has the advantages such as good economy performance, good with the closely connected property of sprayed mortar, light and flexible constructability sets up, but also there is the outstanding problem such as early strength and insufficient rigidity, especially in large cross-section weak surrounding rock tunnel construction, conventional grid steel frame is difficult to resist the surrouding rock deformation sharply developing after tunnel excavation.
Summary of the invention
The utility model is aided with stirrup by four main reinforcements and combines in order to solve existing grid steel frame, has the problem of early strength and insufficient rigidity, and a kind of large cross-section weak surrounding rock tunnel preliminary bracing steelframe is provided.
The utility model is to adopt following technical scheme to realize: large cross-section weak surrounding rock tunnel preliminary bracing steelframe, comprise be bolted together along tunnel excavation outline line on lead steel grating, in the left and right sides, lead steel grating and under lead steel grating and be positioned at the inverted arch steel grating of tunnel bottom, innovative point of the present utility model is to lead steel grating, in lead steel grating, under lead steel grating and inverted arch steel grating is all by the longitudinal main reinforcement of the six roots of sensation, spacer ring is to being fixed on the stirrup of longitudinal main reinforcement periphery and being welded on the structure muscle between adjacent longitudinal main reinforcement, described structure muscle adopts 8 font steelframes and X-shaped steel frame interval to arrange.
On described, lead steel grating with in the left and right sides, lead steel grating, in lead steel grating with under lead steel grating, under lead between steel grating and inverted arch steel grating and adopt respectively corresponding A joint, B joint, C joint, D joint to be connected, described joint is by forming with junction steel plate and the L-type stiffening rib of the welding of adjacent steel grid, L-type stiffening rib one side and adjacent steel grid are fixed, another side and junction steel plate are bolted
Compared with prior art, grid steel frame described in the utility model adopts the longitudinal main reinforcement of the six roots of sensation and by 8 font steelframes and the spaced structure muscle of X-shaped steel frame, not only can realize closely connected with sprayed mortar, and can provide stronger strength and stiffness for large cross-section weak surrounding rock tunnel preliminary bracing, especially early strength and early stage rigidity, simple in structure, reasonable in design, simple for production, be easy to promote.
Accompanying drawing explanation
Fig. 1 is cross section of the present utility model constructional drawing;
Fig. 2 is facade installation drawing of the present utility model;
Fig. 3 is Plane Installation figure of the present utility model;
Fig. 4 is the detail drawing of A in Fig. 1, B joint;
Fig. 5 is the detail drawing of C joint in Fig. 1;
Fig. 6 is the detail drawing of D joint in Fig. 1;
In figure: lead steel grating on 1-; In 2-, lead steel grating; Under 3-, lead steel grating; 4-inverted arch steel grating; The longitudinal main reinforcement of 5-; 6-stirrup; 7-8 font steelframe; 8-X shaped steel frame; 9-A joint; 10-B joint; 11-C joint; 12-D joint; 13-junction steel plate; 14-L type stiffening rib; 15-bolt.
The specific embodiment
Large cross-section weak surrounding rock tunnel preliminary bracing steelframe, as shown in Figure 1, 2, 3, comprise be bolted together along tunnel excavation outline line on lead steel grating 1, the left and right sides in lead steel grating 2 and under lead steel grating 3 and be positioned at the inverted arch steel grating 4 of tunnel bottom, on lead steel grating, in lead steel grating, under lead steel grating and inverted arch steel grating be all by the longitudinal main reinforcement 5 of the six roots of sensation, spacer ring to being fixed on the stirrup 6 of longitudinal main reinforcement periphery and being welded on the structure muscle between adjacent longitudinal main reinforcement, described structure muscle adopts 8 font steelframes 7 and X-shaped steel frame 8 intervals to arrange.
As shown in Figure 4,5, 6, on lead steel grating with in the left and right sides, lead steel grating, in lead steel grating with under lead steel grating, under lead between steel grating and inverted arch steel grating and adopt respectively corresponding A joint 9, B joint 10, C joint 11, D joint 12 to be connected, joint is that by forming with junction steel plate 13 and the L-type stiffening rib 14 of adjacent steel grid welding, L-type stiffening rib one side and adjacent steel grid are fixed, another side is passed through bolt 15 with junction steel plate and fixed.Different according to the position of A joint, B joint, C joint, D joint, its structure is slightly had any different, and concrete structure as shown in the figure.
This grid steel frame is made up of 8 unit, and each unit is prefabricated outside hole, and assembling in hole, can be according to actual conditions adjustment unit length when construction, and corresponding adjustment joint location.
Claims (2)
1. a large cross-section weak surrounding rock tunnel preliminary bracing steelframe, comprise be bolted together along tunnel excavation outline line on lead steel grating (1), in the left and right sides, lead steel grating (2) and under lead steel grating (3) and be positioned at the inverted arch steel grating (4) of tunnel bottom, it is characterized in that leading steel grating, in lead steel grating, under lead steel grating and inverted arch steel grating is all by the longitudinal main reinforcement of the six roots of sensation (5), spacer ring is to being fixed on the stirrup (6) of longitudinal main reinforcement periphery and being welded on the structure muscle between adjacent longitudinal main reinforcement, described structure muscle adopts 8 font steelframes (7) and X-shaped steel frame (8) interval to arrange.
2. large cross-section weak surrounding rock tunnel preliminary bracing steelframe according to claim 1, it is characterized in that leading steel grating and the left and right sides in lead steel grating, in lead steel grating with under lead steel grating, under lead and between steel grating and inverted arch steel grating, adopt respectively corresponding A joint (9), B joint (10), C joint (11), D joint (12) connects, described joint is by forming with junction steel plate (13) and the L-type stiffening rib (14) of the welding of adjacent steel grid, L-type stiffening rib one side and adjacent steel grid are fixed, another side and junction steel plate are fixing by bolt (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320873335.5U CN203685217U (en) | 2013-12-28 | 2013-12-28 | Initial-stage supporting steel frame of large-section weak-surrounding-rock tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320873335.5U CN203685217U (en) | 2013-12-28 | 2013-12-28 | Initial-stage supporting steel frame of large-section weak-surrounding-rock tunnel |
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| Publication Number | Publication Date |
|---|---|
| CN203685217U true CN203685217U (en) | 2014-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320873335.5U Expired - Fee Related CN203685217U (en) | 2013-12-28 | 2013-12-28 | Initial-stage supporting steel frame of large-section weak-surrounding-rock tunnel |
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| CN (1) | CN203685217U (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104533446A (en) * | 2015-01-16 | 2015-04-22 | 中交一公局第一工程有限公司 | Construction method and structure of two-layer preliminary support for preventing geological disaster of large-section weak surrounding rock tunnel |
| CN104596374A (en) * | 2015-01-07 | 2015-05-06 | 浙江省隧道工程公司 | Blasting process for tunnel karst cave construction |
| CN104929656A (en) * | 2015-06-02 | 2015-09-23 | 蔺宏哲 | Novel tunnel first lining structure and construction method thereof |
| CN105537886A (en) * | 2015-12-03 | 2016-05-04 | 申志军 | Automatic manufacturing process for butterfly rebars of tunnel grid rebar truss |
| CN105863168A (en) * | 2016-06-02 | 2016-08-17 | 河南宝润机械有限公司 | Twisted 8-shaped steel bar ring and prefabricated block |
| CN105863148A (en) * | 2016-05-28 | 2016-08-17 | 河南宝润机械有限公司 | Double rebar rings shaped like Arabic numeral eight and prefabricated block |
| CN106112324A (en) * | 2016-07-28 | 2016-11-16 | 中国建筑第六工程局有限公司 | The manufacture method of Mining Method preliminary bracing grid steel frame weld mold |
| CN106988765A (en) * | 2016-12-13 | 2017-07-28 | 范玫光 | High intensity grid steel frame and its manufacture method |
| CN108457679A (en) * | 2018-03-13 | 2018-08-28 | 中铁隧道局集团有限公司 | Grid steel frame, the assembled device of grid steel frame examination and grid steel frame production method |
| CN108843342A (en) * | 2018-08-15 | 2018-11-20 | 中铁第勘察设计院集团有限公司 | Realize the assembled preliminary bracing structure of tunnel quick closure |
| CN109915175A (en) * | 2019-04-26 | 2019-06-21 | 北京市市政工程设计研究总院有限公司 | A kind of grid type reinforcing bar grid steelframe |
| CN110318785A (en) * | 2019-08-01 | 2019-10-11 | 中铁二院成都勘察设计研究院有限责任公司 | A kind of steelframe and its construction method based on tunnel machine full face tunneling |
| CN111648794A (en) * | 2020-06-02 | 2020-09-11 | 山东高速科技发展集团有限公司 | Support framework for tunnel portal section in cold region and installation method |
-
2013
- 2013-12-28 CN CN201320873335.5U patent/CN203685217U/en not_active Expired - Fee Related
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104596374A (en) * | 2015-01-07 | 2015-05-06 | 浙江省隧道工程公司 | Blasting process for tunnel karst cave construction |
| CN104533446A (en) * | 2015-01-16 | 2015-04-22 | 中交一公局第一工程有限公司 | Construction method and structure of two-layer preliminary support for preventing geological disaster of large-section weak surrounding rock tunnel |
| CN104533446B (en) * | 2015-01-16 | 2017-06-06 | 中交一公局第一工程有限公司 | Construction method and its structure that a kind of big cross section Support System in Soft Rock Tunnels bilayer pre- Geological disaster prevention of preliminary bracing occurs |
| CN104929656B (en) * | 2015-06-02 | 2017-01-18 | 蔺宏哲 | Tunnel first lining structure construction method |
| CN104929656A (en) * | 2015-06-02 | 2015-09-23 | 蔺宏哲 | Novel tunnel first lining structure and construction method thereof |
| CN105537886A (en) * | 2015-12-03 | 2016-05-04 | 申志军 | Automatic manufacturing process for butterfly rebars of tunnel grid rebar truss |
| CN105863148A (en) * | 2016-05-28 | 2016-08-17 | 河南宝润机械有限公司 | Double rebar rings shaped like Arabic numeral eight and prefabricated block |
| CN105863168A (en) * | 2016-06-02 | 2016-08-17 | 河南宝润机械有限公司 | Twisted 8-shaped steel bar ring and prefabricated block |
| CN106112324A (en) * | 2016-07-28 | 2016-11-16 | 中国建筑第六工程局有限公司 | The manufacture method of Mining Method preliminary bracing grid steel frame weld mold |
| CN106112324B (en) * | 2016-07-28 | 2017-11-14 | 中国建筑第六工程局有限公司 | The preparation method of Mining Method preliminary bracing grid steel frame weld mold |
| CN106988765A (en) * | 2016-12-13 | 2017-07-28 | 范玫光 | High intensity grid steel frame and its manufacture method |
| CN108457679A (en) * | 2018-03-13 | 2018-08-28 | 中铁隧道局集团有限公司 | Grid steel frame, the assembled device of grid steel frame examination and grid steel frame production method |
| CN108843342A (en) * | 2018-08-15 | 2018-11-20 | 中铁第勘察设计院集团有限公司 | Realize the assembled preliminary bracing structure of tunnel quick closure |
| CN109915175A (en) * | 2019-04-26 | 2019-06-21 | 北京市市政工程设计研究总院有限公司 | A kind of grid type reinforcing bar grid steelframe |
| CN110318785A (en) * | 2019-08-01 | 2019-10-11 | 中铁二院成都勘察设计研究院有限责任公司 | A kind of steelframe and its construction method based on tunnel machine full face tunneling |
| CN111648794A (en) * | 2020-06-02 | 2020-09-11 | 山东高速科技发展集团有限公司 | Support framework for tunnel portal section in cold region and installation method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140702 Termination date: 20211228 |
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| CF01 | Termination of patent right due to non-payment of annual fee |