CN204476420U - A kind of tunnel being applicable to bias voltage landform - Google Patents
A kind of tunnel being applicable to bias voltage landform Download PDFInfo
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- CN204476420U CN204476420U CN201520073412.8U CN201520073412U CN204476420U CN 204476420 U CN204476420 U CN 204476420U CN 201520073412 U CN201520073412 U CN 201520073412U CN 204476420 U CN204476420 U CN 204476420U
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Abstract
The utility model discloses a kind of tunnel being applicable to bias voltage landform, comprise the first tunnel, mid-board and the second tunnel, the first tunnel and the second tunnel divide the both sides being located at mid-board, and the ratio of rise to span in the first tunnel is different from the ratio of rise to span in the second tunnel; The thrust at springer of first arching of the less side of ratio of rise to span will be greater than the larger side of ratio of rise to span, and the unequal thrust in both sides forms the moment stoping mid-board to topple; Both sides preliminary bracing adopts not uniform thickness design, and the thickness of the larger side of landform pressure is greater than the less side of landform pressure, makes both sides just prop up stress level suitable, avoids the waste of material; Tunnel, landform pressure larger side is used as railway traffic, and the less side of landform pressure is used as highway communication; The utility model achieve tunnel structure stressed on optimization and tunnel in the making full use of of space.
Description
Technical field
The utility model belongs to highway tunnel field, is specifically related to a kind of tunnel being applicable to bias voltage landform.
Background technology
Between hole, tunnel two, clear distance is not enough at present, or during tunnel show line limited space, generally builds multiple-arch tunnel and pass through landform.There is bias-pressure phenomenon in this type of landform majority, the multiple-arch tunnel that conventional design is built, the ratio of rise to span that institute's arching is just propped up in both sides is identical, after tunnel builds up, the landform of bias voltage puts on the pressure difference that institute's arching is just propped up in both sides, therefore just the horizontal thrust of arch springing wall in middle wall fulcrum place puts on is also different, and this will cause Middle Wall of Multi-Arch Highway Tunnel to bear overturning moment, cause huge potential safety hazard to tunnel structure.
Summary of the invention
For defect of the prior art and deficiency, the overturning moment that the mid-board caused for overcoming both sides, tunnel bias voltage landform bears, increases tunnel safety, and improves tunnel clearance utilization rate, optimize tunnel space to utilize, the utility model proposes a kind of tunnel being particularly useful for bias voltage landform.
For solving the problem, the technical solution adopted in the utility model is:
Be applicable to a tunnel for bias voltage landform, comprise the first tunnel, mid-board and the second tunnel, the first tunnel and the second tunnel divide the both sides being located at mid-board, and the ratio of rise to span in the first tunnel is different from the ratio of rise to span in the second tunnel.
Further, the first described tunnel is followed successively by the first preliminary bracing and the first tunnel lining from outside to inside, the second described tunnel is followed successively by the second preliminary bracing and the second tunnel lining from outside to inside, described mid-board connects the first tunnel lining and the second tunnel lining, and the end of the first preliminary bracing is goed deep in mid-board along the circumferencial direction in the first tunnel, the end of the second preliminary bracing is goed deep in mid-board along the circumferencial direction in the second tunnel.
Concrete, described mid-board is wall in monolithic song, and the thickness of mid-board is 2.5m, and the length that mid-board is goed deep in the first preliminary bracing is 50cm, and the length that mid-board is goed deep in the second preliminary bracing is 50cm.
More specifically, the descending direction of the gradient along bias voltage landform sets gradually the first tunnel, mid-board and the second tunnel, and the ratio of the ratio of rise to span in the first tunnel and the ratio of rise to span in the second tunnel is 1.2 ~ 1.5:1.
In addition, the little 3 ~ 7cm of thickness of Thickness Ratio first preliminary bracing of the second described preliminary bracing.
Compared with prior art, the beneficial effects of the utility model are:
(1) preliminary bracing of mid-board both sides adopts different ratios of rise to span, both sides lining cutting arch springing centering partition wall produces different thrust-balancing overturning moment, consider effective utilization of headroom, tunnel, both sides is respectively used to variety classes traffic, structure stress optimization and space utilization are optimized integration, break through the limitation thinking that road and rail designs separately, realize the more excellent utilization of resource;
(2) concrete when h1/d1:h2/d2=1:1.2 ~ 1.5, mid-board bias voltage improves obviously, and t2 3 ~ 7cm less of t1, reach structural safety and can save material simultaneously;
(3) preliminary bracing in tunnel, both sides is formed overall stressed within the walls with middle wall in stretching into, the stability of wall and preliminary bracing in increase.
Accompanying drawing explanation
Fig. 1 is the structural representation in the utility model tunnel;
Fig. 2 is middle partition wall structure enlarged drawing;
Fig. 3 is the utility model tunnel scale diagrams;
Fig. 4 is constructing tunnel step schematic diagram of the present utility model;
In figure, each label is expressed as: 1-first tunnel, 10-first tunnel lining, 11-first preliminary bracing, 110-first temporary lining, 2-second tunnel, 20-second tunnel lining, 21-second preliminary bracing, 210-second temporary lining, 3-mid-board, 301-the 3rd temporary lining;
A-first rock mass, B-second rock mass, C-the 3rd rock mass, D-the 4th rock mass, E-the 5th rock mass, F-the 6th rock mass, G-the 7th rock mass;
D1 is the first tunnel spanning footpath, and h1 is the first tunnel rise, and d2 is the second tunnel spanning footpath, and h2 is the second tunnel rise, and t1 is the first preliminary bracing thickness; T2 is the second preliminary bracing thickness;
Below in conjunction with specification drawings and specific embodiments, the utility model is illustrated.
Detailed description of the invention
The fulcrum of the preliminary bracing on the utility model mid-board is the rise in tunnel to the height of preliminary bracing vault, and the span in the tunnel of the level of the fulcrum position of the preliminary bracing on mid-board is tunnel spanning footpath, and both ratios are the ratio of rise to span in tunnel.
Bias voltage landform described in the utility model refers to that on tunnel, the overlying strata soil body exists the landform of certain gradient, causes hole, tunnel two load asymmetric.
The tunnel being applicable to bias voltage landform of the present embodiment, comprise the first tunnel, mid-board and the second tunnel, first tunnel and the second tunnel divide the both sides being located at mid-board, and the ratio of rise to span in the first tunnel is different from the ratio of rise to span in the second tunnel, adapt to bias voltage landform, sound construction, reduce the overturning moment that even elimination mid-board bears, increase tunnel safety, and improve tunnel clearance utilization rate, optimize tunnel space and utilize;
Further, the first described tunnel is followed successively by the first preliminary bracing and the first tunnel lining from outside to inside, the second described tunnel is followed successively by the second preliminary bracing and the second tunnel lining from outside to inside, described mid-board connects the first tunnel lining and the second tunnel lining, and the end of the first preliminary bracing is goed deep in mid-board along the circumferencial direction in the first tunnel, the end of the second preliminary bracing is goed deep in mid-board along the circumferencial direction in the second tunnel, the preliminary bracing in tunnel, both sides is formed overall stressed within the walls with middle wall in stretching into, the stability of wall and preliminary bracing in increase.
Concrete, described mid-board is wall in monolithic song, and the thickness of mid-board is 2.5m, and the length that mid-board is goed deep in the first preliminary bracing is 50cm, the length that mid-board is goed deep in second preliminary bracing is 50cm, and the correlation between concrete mid-board and both sides supporting just can reach stable effect;
More specifically, the first tunnel, mid-board and the second tunnel is set gradually along the direction that the gradient of bias voltage landform is descending, the ratio of the ratio of rise to span in the first tunnel and the ratio of rise to span in the second tunnel is 1.2 ~ 1.5:1, and experiment proves that the ratio of rise to span of this scope can reduce the overall pressure-bearing value in tunnel;
In addition, the little 3 ~ 7cm of thickness of Thickness Ratio first preliminary bracing of the second described preliminary bracing, meets the requirements of simultaneously with minimum thickness, saves material.
Embodiment one:
In conjunction with Fig. 1 and 2, the multiple-arch tunnel being suitable for bias voltage landform of the present embodiment comprises the first tunnel 2, tunnel 1, second and mid-board 3, wherein:
First tunnel 1 comprises the first tunnel lining 10 and the first preliminary bracing 11, second tunnel 2 comprises the second tunnel lining 20 and the second preliminary bracing 21, first tunnel spanning footpath d1 is 6m, and the first tunnel rise h1 is 14m.Second tunnel spanning footpath d2 is 5m, and the second tunnel rise h2 is 15m, and the first preliminary bracing thickness t1 is 25cm, and the second preliminary bracing thickness t2 is 20cm; Mid-board adopts wall in monolithic song, and wall thickness 2.5m, the length that mid-board 3 is goed deep in the first preliminary bracing 11 is 50cm, and the length that mid-board 3 is goed deep in the second preliminary bracing 21 is 50cm.
The ratio of rise to span in the first tunnel 1 is the ratio of rise to span in the 3/7, second tunnel 2 is 1/3,
adopt the present embodiment and general symmetric design, utilize ANSYS finite element software to calculate and show:
(1) mid-board utilizing this programme to design is stressed obviously evenly, and bias condition has larger improvement.When adopting general approach to design, mid-board maximum compressional is 3.64MPa, and adopt its value of this programme to be 3.61MPa, load also makes moderate progress;
(2), during general approach design, the first preliminary bracing 11 and the first tunnel lining 10 maximum crushing stress are respectively 5.3 and 4.2MPa, and the second preliminary bracing 21 and the second tunnel lining 20 maximum crushing stress are respectively 5.9 and 6.1MPa; During employing this programme, the first preliminary bracing 11 and the first tunnel lining 10 maximum crushing stress are respectively 4.5 and 5.1MPa, second preliminary bracing 21 and the second tunnel lining 20 maximum crushing stress are respectively 4.3 and 5.5MPa, under obvious this programme, structure on two sides is quite stressed, and all less than normal, structure stress is improved obviously.
Embodiment two:
In conjunction with Fig. 1 and 2, the present embodiment and embodiment one are 7m unlike the first tunnel spanning footpath d1, and the first tunnel rise h1 is 14m; Second tunnel spanning footpath d2 is 5m, and the second tunnel rise h2 is 15m; The ratio of rise to span in the first tunnel 1 is the ratio of rise to span in the 1/2, second tunnel 2 is 1/3,
adopt the present embodiment design compared with general symmetric design, utilize ANSYS finite element software to calculate and show:
(1) mid-board utilizing this programme to design is stressed obviously evenly, and bias condition has larger improvement.When adopting general approach to design, mid-board maximum compressional is 3.6MPa, and adopt its value of this programme to be 3.1MPa, load also makes moderate progress;
(2), during general approach design, the first preliminary bracing 11 and the first tunnel lining 10 maximum crushing stress are respectively 5.3 and 4.2MPa, and the second preliminary bracing 21 and the second tunnel lining 20 maximum crushing stress are respectively 5.9 and 6.1MPa; During employing this programme, the first preliminary bracing 11 and the first tunnel lining 10 maximum crushing stress are respectively 5.0 and 3.2MPa, second preliminary bracing 21 and the second tunnel lining 20 maximum crushing stress are respectively 5.3 and 2.8MPa, under obvious this programme, structure on two sides is quite stressed, and all less than normal, structure stress is improved obviously.
Composition graphs 4, the multiple-arch tunnel Specific construction step being suitable for bias voltage landform of the present utility model is as follows:
1, the Rock And Soil excavating the first rock mass part A forms middle drift, and the 3rd temporary lining 301 of middle drift of constructing, construction mid-board 3;
2, the Rock And Soil that the 5th rock mass E part is corresponding is excavated, and the first preliminary bracing 11 of construct the first temporary lining 110 and corresponding section;
3, the Rock And Soil that the second rock mass part B is corresponding is excavated, and the second preliminary bracing 21 of construct the second temporary lining 210 and corresponding section;
4, the Rock And Soil that the 6th rock mass F part is corresponding is excavated, and the first preliminary bracing 11 of corresponding section of constructing;
5, the Rock And Soil that the 3rd rock mass C part is corresponding is excavated, and the second preliminary bracing 21 of corresponding section of constructing;
6, excavate the 7th corresponding Rock And Soil of rock mass G part and the corresponding Rock And Soil of the 4th rock mass D part, carry out the first tunnel lining 10 and the second tunnel lining 20 of corresponding section.
Claims (1)
1. one kind is applicable to the tunnel of bias voltage landform, it is characterized in that, comprise the first tunnel (1), mid-board (3) and the second tunnel (2), first tunnel (1) and the second tunnel (2) point are located at the both sides of mid-board (3), and the ratio of rise to span of the first tunnel (1) is different from the ratio of rise to span of the second tunnel (2);
Described the first tunnel (1) is followed successively by the first preliminary bracing (11) and the first tunnel lining (10) from outside to inside, described the second tunnel (2) is followed successively by the second preliminary bracing (21) and the second tunnel lining (20) from outside to inside, described mid-board (3) connects the first tunnel lining (10) and the second tunnel lining (20), and the end of the first preliminary bracing (11) is goed deep in mid-board (3) along the circumferencial direction of the first tunnel (1), the end of the second preliminary bracing (21) is goed deep in mid-board (3) along the circumferencial direction of the second tunnel (2),
Described mid-board (3) is wall in monolithic song, the thickness of mid-board (3) is 2.5m, the length that mid-board (3) is goed deep in first preliminary bracing (11) is 50cm, and the length that mid-board (3) is goed deep in the second preliminary bracing (21) is 50cm;
Set gradually the first tunnel (1), mid-board (3) and the second tunnel (2) along the direction that the gradient of bias voltage landform is descending, the ratio of the ratio of rise to span of the first tunnel (1) and the ratio of rise to span of the second tunnel (2) is 1.2 ~ 1.5:1;
Little 3 ~ the 7cm of thickness of Thickness Ratio first preliminary bracing (11) of described the second preliminary bracing (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520073412.8U CN204476420U (en) | 2015-02-02 | 2015-02-02 | A kind of tunnel being applicable to bias voltage landform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520073412.8U CN204476420U (en) | 2015-02-02 | 2015-02-02 | A kind of tunnel being applicable to bias voltage landform |
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| CN204476420U true CN204476420U (en) | 2015-07-15 |
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| CN201520073412.8U Expired - Fee Related CN204476420U (en) | 2015-02-02 | 2015-02-02 | A kind of tunnel being applicable to bias voltage landform |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109882182A (en) * | 2019-01-09 | 2019-06-14 | 中铁七局集团西安铁路工程有限公司 | A kind of extra small clear distance construction method in tunnel |
| CN111075454A (en) * | 2020-01-17 | 2020-04-28 | 中铁十九局集团第三工程有限公司 | Double-arch tunnel five-hole excavation method |
| CN113622941A (en) * | 2021-09-10 | 2021-11-09 | 中铁一局集团第五工程有限公司 | Large-span double-arch tunnel excavation method under urban complex environment |
-
2015
- 2015-02-02 CN CN201520073412.8U patent/CN204476420U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109882182A (en) * | 2019-01-09 | 2019-06-14 | 中铁七局集团西安铁路工程有限公司 | A kind of extra small clear distance construction method in tunnel |
| CN111075454A (en) * | 2020-01-17 | 2020-04-28 | 中铁十九局集团第三工程有限公司 | Double-arch tunnel five-hole excavation method |
| CN111075454B (en) * | 2020-01-17 | 2022-01-04 | 中铁十九局集团第三工程有限公司 | Double-arch tunnel five-hole excavation method |
| CN113622941A (en) * | 2021-09-10 | 2021-11-09 | 中铁一局集团第五工程有限公司 | Large-span double-arch tunnel excavation method under urban complex environment |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150715 Termination date: 20160202 |