CN104948217A - Air duct structure for underground ventilation system overpassing main hole of tunnel - Google Patents
Air duct structure for underground ventilation system overpassing main hole of tunnel Download PDFInfo
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- CN104948217A CN104948217A CN201510430442.4A CN201510430442A CN104948217A CN 104948217 A CN104948217 A CN 104948217A CN 201510430442 A CN201510430442 A CN 201510430442A CN 104948217 A CN104948217 A CN 104948217A
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- air channel
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- air duct
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Abstract
The invention discloses an air duct structure for an underground ventilation system overpassing a main hole of a tunnel. The air duct structure comprises a connecting air duct used for communicating the main hole with an auxiliary hole of the tunnel and connected with a ventilating shaft; the connecting air duct is provided with a crossing section used for crossing the main hole of the tunnel along the outline of the main hole of the tunnel; the crossing section comprises an inner-layer housing and an outer-layer housing; a crossing section air duct communicated with the connecting air duct is formed between the inner-layer housing and the outer-layer housing; air duct baffles are arranged in the crossing section air duct in the longitudinal direction; plugging walls used for expanding the cross sections of ends of the outer-layer housing are respectively arranged on two longitudinal sides of the outer-layer housing; reinforcing sections are respectively arranged at the joints between the two ends of the crossing section and the connecting air duct. On the premise of not influencing the ventilation effect, the construction is convenient, the working procedures are reasonably arranged, the flexible scheduling possibility is improved, the main hole and the air duct structure are constructed integrally, and the air duct structure has the advantages that once excavation shaping (in place) is achieved, pouring is carried out according to a sequence step by step, the construction organization is flexible, and the excavation risks are reduced.
Description
Technical field
The present invention relates to Tunnel Ventilation System, particularly a kind of on across the air channel structure of main hole, tunnel underground ventilation.
Background technology
Under the national strategy overall background on " band one tunnel ", the infrastructure such as railway, highway development is swift and violent.By geographical conditions restriction and the raising of technical standard, Extra-long Highway Tunnel is also built more and more.Because of the needs of comfort level of taking precautions against natural calamities, rescue and drive a vehicle, most Extra-long Highway Tunnel all will arrange ventilating shaft (vertical shaft or inclined shaft) and take a breath.In underground, contact air channel between tunnel and ventilating shaft, is adopted to link.When bidirectional tunnel (left and right line) shares a ventilating shaft, usually needing contact air channel to cross over one of them main hole could connect with ventilating shaft.
The domestic design to this part at present usually adopt contact air channel to be separated with main hole, tunnel to intersect on across pattern, contact air channel base plate distance main hole, tunnel vault about 5 ~ 15m.But there is following shortcoming in this structure: steep across main hole section contact slope, air channel 1, constructional difficulties.Take up an area for saving, the level interval between left and right line two tunnel is not more than 35m usually; Consider route indices, on same section, the discrepancy in elevation in two tunnels is not more than 2m; For guaranteeing construction safety, the depth of stratum of contact air channel and tunnel vault is at least greater than 5m, and general control is between 10 ~ 15m; Two track tunnel excavation height (road surface is apart from vault distance) about 8m, three lanes tunnel excavation height is about 9.5m, according to horizontal range and the discrepancy in elevation, on across the contact air channel gradient in right hole at least more than 20 °, in addition air channel section is got in touch with usually less, therefore cannot utilize in digging machine, forklift etc., big machinery operation, hand excavation is extremely difficult.2, complicated organization, operation can not flexible conversion, the first due on the contact air channel gradient across main hole section large, from contacting to mainly wide openly digging, draining is all very difficult, therefore excavation can only carry out from main hole to the direction in contact air channel; Its two be contact Jin Yuzuo hole, air channel be connected, therefore the construction of left hole can only be waited to this position just to carry out contact air channel excavation, and because the various reasons such as geology, machinery, personnel can not ensure that left hole can arrive this position at first in site operation process, this position even if construct in advance in right hole, can not launch the construction of contact air channel in advance.3, no matter be first excavate main hole or first excavate across main hole section contact air channel, the Blasting Excavation of Hou Hangdong (hole of rear row excavation) all can have an impact to leading hole structure, there is potential safe construction risk.
Therefore, under being badly in need of a kind of prerequisite not affecting ventilation effect of exploitation, convenient construction, reasonable arrangement operation, increase flexible dispatching possibility, make main hole and air channel structure " construction integrated ", reduce to greatest extent because construction causes potential damage risk between works, have " once excavate shaping (putting in place), branch build according to the order of sequence, construction organization flexibly, reduce excavation risk " advantage on across the air channel structure of main hole, tunnel underground ventilation.
Summary of the invention
In view of this, the object of this invention is to provide a kind of on across the air channel structure of main hole, tunnel underground ventilation, can under the prerequisite not affecting ventilation effect, convenient construction, reasonable arrangement operation, increase flexible dispatching possibility, make main hole and air channel structure " construction integrated ", reduce to greatest extent because of the potential damage risk caused between works of constructing, there is the advantage of " once excavate shaping (putting in place), branch builds according to the order of sequence, construction organization is flexible, reduce excavation risk ".
Of the present invention on across the air channel structure of main hole, tunnel underground ventilation, comprise for being communicated with tunnel master, secondary hole the contact air channel be connected with ventilating shaft, described contact air channel has the main hole profile along tunnel and crosses over the Crossover phase in main hole, tunnel, described Crossover phase comprises internal layer shell and outer casing, described internal layer shell with formed between outer casing and the Crossover phase air channel that is communicated with, contact air channel, air-duct clapboard is vertically arranged with in described Crossover phase air channel, longitudinal both sides of described outer casing are respectively equipped with the plug wall for expanding termination section, the two ends of described Crossover phase are respectively equipped with strengthening segment with the junction in contact air channel.
Further, the Internal periphery of described internal layer shell is identical with the Internal periphery in main hole, tunnel.
Further, described internal layer shell is reinforced concrete lining layer.
Further, described outer casing comprises first and steel concrete two lining.
Further, the longitudinal length of described outer casing is greater than the width in contact air channel, and the longitudinal length of described internal layer shell is identical with the longitudinal length of outer casing.
Further, described air-duct clapboard is supported between internal layer shell and outer casing, and described air-duct clapboard is two, and two air-duct clapboards are longitudinally disposed in Crossover phase air channel, and Crossover phase air channel is separated into tubulose curve air channel by two air-duct clapboards.
Further, smoother by Concrete Filled between described internal layer shell and the bottom of outer casing.
The invention has the beneficial effects as follows: of the present invention on across the air channel structure of main hole, tunnel underground ventilation, achieve " on across the monolithic " structure in contact air channel and main hole, tunnel, not only easy construction, when crossover location is constructed in main hole, tunnel, does not need newly-increased excavated surface, abrupt slope is not needed to excavate, directly from tunnel, main hole face expands section, once excavates shaping, and large cross section excavation, facilitate large and medium-sized mechanical work, improve efficiency of construction; And construction organization is simple, realize operation flexible conversion, when Crossover phase is constructed in contact air channel, the construction expanding section can be carried out by normal construction step sequence, if because of various reasons main hole, tunnel, place can not first arrive and the secondary hole of adjacent tunnel arrives the same cross section of infall in advance time, by the secondary wide open contact air channel of digging of adjacent tunnel to main hole, this tunnel, thus the construction at main hole, tunnel place can be carried out, not delay programming; Simultaneously because employing is once excavated shaping, there is not the mutual interference in successively hole, impact, working security is high, and due to contact air channel and main hole, tunnel, together Blasting Excavation is shaping, then no longer include close Blasting Excavation, therefore there is not the situation of successively excavation, there is not rear row hole explosion to the vibration influence in leading hole.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described:
Fig. 1 is structural representation of the present invention;
Fig. 2 is that the A-A of Fig. 1 is to schematic diagram;
Fig. 3 is that the B-B of Fig. 1 is to schematic diagram;
Fig. 4 is the schematic diagram of air-duct clapboard of the present invention;
Fig. 5 is the schematic diagram of plug wall of the present invention.
Detailed description of the invention
Fig. 1 is structural representation of the present invention, Fig. 2 is that the A-A of Fig. 1 is to schematic diagram, Fig. 3 is that the B-B of Fig. 1 is to schematic diagram, Fig. 4 is the schematic diagram of air-duct clapboard of the present invention, Fig. 5 is the schematic diagram of plug wall of the present invention, as shown in the figure: the present embodiment on across the air channel structure of main hole, tunnel underground ventilation, comprise for being communicated with tunnel master, secondary hole 1, 2 and the contact air channel 3 be connected with ventilating shaft, in constructing tunnel, usually will the tunnel of right lateral vehicle pass-through be only allowed to be called right threaded list road (or being called main hole, tunnel), left threaded list road (or being called secondary hole, tunnel) is called by only allowing the tunnel of left lateral vehicle pass-through, the one end in contact air channel 3 is communicated with secondary hole 2, tunnel, the other end is crossed over main hole 1, tunnel and is connected with ventilating shaft.Described contact air channel 3 has main hole 1 profile along tunnel and crosses over the Crossover phase 4 in main hole 1, tunnel, " on across monolithic " structure is adopted when the main hole 1 in contact air channel 3 and tunnel is intersected, described Crossover phase 4 comprises internal layer shell 5 and outer casing 6, difference in height between outer casing 6 and internal layer shell 5 is about 300cm (this difference in height tunnel can adjust according to tunnel Wind Coverage Calculation), be consistent with the area in the contact air channel making the area of Crossover phase and Zhu Dong both sides, tunnel as far as possible, described internal layer shell 5 with formed between outer casing 6 and the Crossover phase air channel 7 that is communicated with, contact air channel 3, to ensure tunnel ventilation, air-duct clapboard 8 is vertically arranged with in described Crossover phase air channel 7, for reducing section sudden enlargement, and support is formed to Crossover phase 4, longitudinal both sides of described outer casing 6 are respectively equipped with the plug wall 9 for expanding termination section, the shutoff of plug wall is between the excavated section and the termination of ordinary crossing section of outer casing, the two ends of described Crossover phase 4 are respectively equipped with strengthening segment 10 with the junction in contact air channel 3, the length of strengthening segment 10 is 500cm, to strengthen the security performance of total.
In the present embodiment, the Internal periphery of described internal layer shell 5 is identical with the Internal periphery in main hole, tunnel 1, ensures the uniformity in internal layer shell 5 and main hole 1, tunnel, constructability.
In the present embodiment, described internal layer shell 5 is reinforced concrete lining layer, and its thickness is about 40cm, to ensure support strength and the structural safety of internal layer shell 5.
In the present embodiment, described outer casing 6 comprises first and steel concrete two lining, and the thickness that steel concrete two serves as a contrast is about 65cm, to ensure support strength and the structural safety of outer casing 6.
In the present embodiment, the longitudinal length of described outer casing 6 is greater than the width in contact air channel 3, the longitudinal length of outer casing 6 is that the width getting in touch with air channel 3 widens 300cm in main hole axis both sides respectively along tunnel, to ensure outer casing and the structural safety getting in touch with air channel infall, the longitudinal length of described internal layer shell 5 is identical with the longitudinal length of outer casing 6, to ensure integrally-built structural safety.
In the present embodiment, described air-duct clapboard 8 is supported between internal layer shell 5 and outer casing 6, described air-duct clapboard 8 is two, two air-duct clapboards 8 are longitudinally disposed in Crossover phase air channel 7, Crossover phase air channel 7 is separated into tubulose curve air channel by two air-duct clapboards 8, for reducing windage loss, the spacing between two air-duct clapboards 8 can adjust according to the air quantity in concrete tunnel, makes the area in the contact air channel of the area of Crossover phase and Zhu Dong both sides, tunnel be consistent as far as possible.
In the present embodiment, fill smoother by concrete 11 between described internal layer shell 5 and the bottom of outer casing 6, to reduce windage loss further.
Liner supporting structure construction step sequence of the present invention is as follows:
1) Dang Zhudong is excavated to when getting in touch with the position of air channel infall, expands Blasting Excavation section, completes the preliminary bracing (namely completing the excavation that air channel section got in touch with by main hole, tunnel and vault) expanding section.
2) get in touch with air channel from design attitude respectively to Zhu Dong both sides, tunnel excavation and complete preliminary bracing.
3) formwork erection builds the outline secondary lining expanding section section.
4) formwork erection builds the secondary lining (internal layer shell) and air-duct clapboard that expand the main hole of section inner tunnel, and when noting building internal layer shell, its inner outline and tunnel main hole inner outline is completely the same.
5) secondary lining of other sections of contact air channel is completed.
What finally illustrate is, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technical scheme of the present invention or equivalent replacement, and not departing from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (7)
1. one kind on across the air channel structure of main hole, tunnel underground ventilation, comprise for being communicated with tunnel master, secondary hole the contact air channel be connected with ventilating shaft, it is characterized in that: described contact air channel has the main hole profile along tunnel and crosses over the Crossover phase in main hole, tunnel, described Crossover phase comprises internal layer shell and outer casing, described internal layer shell with formed between outer casing and the Crossover phase air channel that is communicated with, contact air channel, air-duct clapboard is vertically arranged with in described Crossover phase air channel, longitudinal both sides of described outer casing are respectively equipped with the plug wall for expanding termination section, the two ends of described Crossover phase are respectively equipped with strengthening segment with the junction in contact air channel.
2. according to claim 1 on across the air channel structure of main hole, tunnel underground ventilation, it is characterized in that: the Internal periphery of described internal layer shell is identical with the Internal periphery in main hole, tunnel.
3. according to claim 1 on across the air channel structure of main hole, tunnel underground ventilation, it is characterized in that: described internal layer shell is reinforced concrete lining layer.
4. according to claim 1 on across the air channel structure of main hole, tunnel underground ventilation, it is characterized in that: described outer casing comprises just and steel concrete two lining.
5. according to claim 1 on across the air channel structure of main hole, tunnel underground ventilation, it is characterized in that: the longitudinal length of described outer casing is greater than the width in contact air channel, and the longitudinal length of described internal layer shell is identical with the longitudinal length of outer casing.
6. according to claim 1 on across the air channel structure of main hole, tunnel underground ventilation, it is characterized in that: described air-duct clapboard is supported between internal layer shell and outer casing, described air-duct clapboard is two, two air-duct clapboards are longitudinally disposed in Crossover phase air channel, and Crossover phase air channel is separated into tubulose curve air channel by two air-duct clapboards.
7. according to claim 1 on across the air channel structure of main hole, tunnel underground ventilation, it is characterized in that: smoother by Concrete Filled between described internal layer shell and the bottom of outer casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510430442.4A CN104948217B (en) | 2015-07-21 | 2015-07-21 | Across the air channel structure of the main hole underground ventilation in tunnel on |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510430442.4A CN104948217B (en) | 2015-07-21 | 2015-07-21 | Across the air channel structure of the main hole underground ventilation in tunnel on |
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| Publication Number | Publication Date |
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| CN104948217A true CN104948217A (en) | 2015-09-30 |
| CN104948217B CN104948217B (en) | 2017-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510430442.4A Expired - Fee Related CN104948217B (en) | 2015-07-21 | 2015-07-21 | Across the air channel structure of the main hole underground ventilation in tunnel on |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110617073A (en) * | 2019-10-08 | 2019-12-27 | 济南城建集团有限公司 | Construction method for air-propelled shield tunneling machine to integrally pass through curved air shaft |
| CN112253142A (en) * | 2020-11-27 | 2021-01-22 | 鲁东大学 | Construction method for short-clear-distance upward-crossing main tunnel of connecting air duct of deep and long tunnel |
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| CN102400701A (en) * | 2010-09-10 | 2012-04-04 | 上海同岩土木工程科技有限公司 | Road tunnel intercommunication type longitudinal ventilation mode |
| CN102536293A (en) * | 2012-02-09 | 2012-07-04 | 浙江省交通规划设计研究院 | Two-line tunnel based on sharing of exhaust communication air passage and ventilation vertical shaft |
| CN104153789A (en) * | 2014-08-21 | 2014-11-19 | 铁道第三勘察设计院集团有限公司 | High-speed railway separation type tunnel-bridge concatenation tunnel portal |
| CN204312086U (en) * | 2014-12-09 | 2015-05-06 | 山西省交通规划勘察设计院 | Tunnel ventilation accessory channel and main hole intersect integral structure |
| CN104594913A (en) * | 2015-01-16 | 2015-05-06 | 中交一公局第一工程有限公司 | Tunnel longitudinal ventilation connection duct and main tunnel zero-clear-distance three-dimensional crossing structure and construction method thereof |
| CN204984468U (en) * | 2015-07-21 | 2016-01-20 | 招商局重庆交通科研设计院有限公司 | A wind channel structure for going up tunnel main cave underground ventilation system strides |
-
2015
- 2015-07-21 CN CN201510430442.4A patent/CN104948217B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102400701A (en) * | 2010-09-10 | 2012-04-04 | 上海同岩土木工程科技有限公司 | Road tunnel intercommunication type longitudinal ventilation mode |
| CN102536293A (en) * | 2012-02-09 | 2012-07-04 | 浙江省交通规划设计研究院 | Two-line tunnel based on sharing of exhaust communication air passage and ventilation vertical shaft |
| CN104153789A (en) * | 2014-08-21 | 2014-11-19 | 铁道第三勘察设计院集团有限公司 | High-speed railway separation type tunnel-bridge concatenation tunnel portal |
| CN204312086U (en) * | 2014-12-09 | 2015-05-06 | 山西省交通规划勘察设计院 | Tunnel ventilation accessory channel and main hole intersect integral structure |
| CN104594913A (en) * | 2015-01-16 | 2015-05-06 | 中交一公局第一工程有限公司 | Tunnel longitudinal ventilation connection duct and main tunnel zero-clear-distance three-dimensional crossing structure and construction method thereof |
| CN204984468U (en) * | 2015-07-21 | 2016-01-20 | 招商局重庆交通科研设计院有限公司 | A wind channel structure for going up tunnel main cave underground ventilation system strides |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110617073A (en) * | 2019-10-08 | 2019-12-27 | 济南城建集团有限公司 | Construction method for air-propelled shield tunneling machine to integrally pass through curved air shaft |
| CN112253142A (en) * | 2020-11-27 | 2021-01-22 | 鲁东大学 | Construction method for short-clear-distance upward-crossing main tunnel of connecting air duct of deep and long tunnel |
| CN112253142B (en) * | 2020-11-27 | 2022-05-24 | 鲁东大学 | Construction method for short-clear-distance upward-crossing main tunnel of connecting air duct of deep and long tunnel |
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| Publication number | Publication date |
|---|---|
| CN104948217B (en) | 2017-06-30 |
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