CN114320339A - Buffering damping device for preventing blasting damage of tunnel portal - Google Patents
Buffering damping device for preventing blasting damage of tunnel portal Download PDFInfo
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- CN114320339A CN114320339A CN202111562816.XA CN202111562816A CN114320339A CN 114320339 A CN114320339 A CN 114320339A CN 202111562816 A CN202111562816 A CN 202111562816A CN 114320339 A CN114320339 A CN 114320339A
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Abstract
The invention discloses a tunnel portal anti-shot damage buffering and damping device which comprises a retaining wall fixed on the periphery of a tunnel portal, an inclined strut detachably arranged in the tunnel portal and used for supporting the inner wall of the tunnel portal and a retaining curtain hung and shielded in front of the tunnel portal. The inclined strut is arranged in the tunnel portal, the retaining wall is arranged at the periphery of the tunnel portal, so that the inner side and the outer side of the tunnel portal are simultaneously reinforced, the strength of the inner side and the periphery of the tunnel portal is enhanced by the inclined strut and the retaining wall, the bearing capacity of the tunnel portal on blasting is improved, and the influence of blasting vibration on the tunnel portal is reduced; according to the invention, the blocking curtain is arranged in front of the tunnel portal to cover and shield the tunnel portal, so that flying rocks splashed by the tunnel portal due to blasting during blasting are prevented from flying out to damage surrounding railways or structures; the method can effectively improve the construction safety when the blasting method is adopted for excavating the tunnel portal.
Description
Technical Field
The invention relates to the technical field of tunnel construction, in particular to a tunnel portal anti-blast damage buffering and damping device.
Background
At present, in tunnel construction, the tunnel entrance to a cave usually adopts the excavator to carry out the short lining excavation of digging for a short time, if the country rock integrality because of the tunnel entrance to a cave better, difficult broken lead to the excavator can not excavate when, then can adopt the blasting method to excavate the construction, but if near the tunnel entrance to a cave exist the high-tension line, or when closing on railway, structure, the vibration of blasting or the flying stone etc. that explodes can lead to the fact the destruction to the periphery, lead to the construction safety can't guarantee.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the utility model provides a can guarantee the safe buffering damping device that big gun decreased is prevented to tunnel entrance to a cave of tunnel when blasting method excavation.
In order to solve the technical problems, the invention adopts the technical scheme that: the tunnel portal prevents buffering damping device that big gun decreased, including fix the barricade in tunnel portal periphery, can dismantle the bracing that sets up in the tunnel portal and support tunnel portal inner wall and hang and shelter from the check curtain in tunnel portal the place ahead.
Further, the method comprises the following steps: the retaining wall is a concrete retaining wall poured on the periphery of the tunnel portal.
Further, the method comprises the following steps: the diagonal brace is formed by cross lapping of a bamboo plate and channel steel.
Further, the method comprises the following steps: the top of barricade is fixed with a plurality of check curtain connecting pieces, the check curtain connecting piece is arranged along the length direction of barricade at interval in proper order, the top and the check curtain connecting piece of check curtain can be dismantled and be connected.
Further, the method comprises the following steps: the stop curtain is formed by splicing a plurality of vertically suspended conveying belts, and the conveying belts are paved on the tunnel portal in the vertical direction.
Further, the method comprises the following steps: the curtain baffle connecting piece is a steel pipe vertically fixed at the top of the retaining wall, and the top of the conveying belt is hung on the corresponding steel pipe.
Further, the method comprises the following steps: at least one lateral side thread anchor rod is fixed on each of two sides of the tunnel portal, a front stop lever is connected between the two corresponding lateral side thread anchor rods, and the front stop lever is positioned in front of the stop curtain.
Further, the method comprises the following steps: the bottom of barricade is fixed with a plurality of bottom screw anchor rods, and a plurality of bottom screw anchor rods are arranged along the length direction of barricade interval in proper order, the bottom and the bottom screw anchor rod of conveyer belt articulate.
The invention has the beneficial effects that: the inclined strut is arranged in the tunnel portal, the retaining wall is arranged at the periphery of the tunnel portal, so that the inner side and the outer side of the tunnel portal are simultaneously reinforced, the strength of the inner side and the periphery of the tunnel portal is enhanced by the inclined strut and the retaining wall, the bearing capacity of the tunnel portal on blasting is improved, and the influence of blasting vibration on the tunnel portal is reduced; according to the invention, the blocking curtain is arranged in front of the tunnel portal to cover and shield the tunnel portal, so that flying rocks splashed by the tunnel portal due to blasting during blasting are prevented from flying out to damage surrounding railways or structures; the method can effectively improve the construction safety when the blasting method is adopted for excavating the tunnel portal.
Drawings
FIG. 1 is a schematic structural view of the present invention;
labeled as: 100-tunnel portal, 200-retaining wall, 300-curtain, 400-curtain connecting piece, 500-side thread anchor rod, 600-front stop lever and 700-bottom thread anchor rod.
Detailed Description
In order to facilitate understanding of the invention, the invention is further described below with reference to the accompanying drawings.
As shown in fig. 1, the tunnel portal blast damage prevention buffering and damping device disclosed by the invention comprises a retaining wall 200, a diagonal brace and a curtain 300. The retaining wall 200 is fixed on the periphery of the tunnel portal 100, and the retaining wall 200 reinforces and strengthens the periphery of the tunnel portal 100 to improve the strength and the shock resistance of the tunnel portal 100 from the outside; the inclined strut is arranged inside the tunnel portal 100, supports and reinforces the inner wall of the tunnel portal 100, and improves the strength and the shock resistance of the tunnel portal 100 from the inner side; the front of the tunnel portal 100 hung by the blocking curtain 300 covers and shields the tunnel portal 100, so that flying stones in the tunnel portal 100 are prevented from splashing out during blasting excavation.
The retaining wall 200 used in the present invention is a concrete retaining wall, and as shown in fig. 1, the concrete retaining wall is fixed on the outer circumference of the retaining wall 200 by means of pouring. The inclined strut adopted by the invention consists of bamboo boards and channel steel, and a plurality of bamboo boards and channel steel are crossed and lapped and then supported on the inner wall surface of the tunnel entrance 100. The curtain 300 used in the present invention is made up of a plurality of vertically suspended conveyor belts that are vertically laid across the tunnel entrance 100.
As shown in fig. 1, a plurality of conveyor belts constituting the curtain 300 are installed through curtain connectors 400, a plurality of curtain connectors 400 are fixed to the top of the retaining wall 200, the curtain connectors 400 are sequentially arranged at intervals along the length direction of the retaining wall 200, and the top of the conveyor belt constituting the curtain 300 is detachably connected to the curtain connectors 400; the steel pipe at barricade 200 top is fixed for vertical to check curtain connecting piece 400, can set up the connecting hole at the top of conveyer belt, directly hang the conveyer belt on the check curtain connecting piece 400 that corresponds can to can effectively improve the convenient degree of dismouting and the efficiency of check curtain 300.
Because the flying stones splashed from the interior of the tunnel portal 100 have high initial kinetic energy during blasting excavation, if only the curtain 300 is adopted, the situation that the curtain 300 is knocked open or damaged by the flying stones may exist, and therefore, the invention is also provided with the front stop rod 600 which is matched with the curtain 300 for use. As shown in fig. 1, at least one lateral threaded anchor rod 500 is fixed on each of two sides of the tunnel portal 100, a front stop lever 600 is connected between the two corresponding lateral threaded anchor rods 500, the front stop lever 600 is located in front of the curtain 300, and the curtain 300 is stopped by the arrangement of the front stop lever 600, so that the deformation degree of the curtain 300 after being impacted by flying stones is reduced.
In addition, the invention also arranges a bottom threaded rod 700 at the bottom of the retaining wall 200, as shown in fig. 1, a plurality of bottom threaded anchor rods 700 are sequentially arranged on the retaining wall 200 below the tunnel portal 100 at intervals along the length direction of the retaining wall 200; the bottom of the conveyor belt can be hooked with the bottom threaded anchor rod 700 by drilling at the bottom of the conveyor belt, and the bottom of the conveyor belt is connected to the retaining wall 200 by arranging the bottom threaded rod 700 to be connected with the bottom of the conveyor belt.
Examples
When the blasting method is adopted for excavating the tunnel portal, the following steps are sequentially carried out;
(1) assembling a diagonal brace inside the tunnel portal by adopting a bamboo board with the thickness of 100 and 16# channel steel, and abutting the diagonal brace against the inner wall of the tunnel portal;
(2) pouring a concrete retaining wall on the periphery of the tunnel portal, and simultaneously pre-burying a seamless steel pipe with the diameter of 89mm by 6mm as a curtain connecting piece at the top of the retaining wall in the pouring process, wherein the pre-buried depth of the seamless steel pipe is 500mm, and the exposed length of the seamless steel pipe is 500 mm;
(3) embedding phi 20mm threaded anchor rods at 200mm positions on two sides of a tunnel portal, wherein the distance between the threaded anchor rods above and below the same side is 800mm, the embedding depth is 400mm, and the exposed length is 200 mm;
(4) embedding phi 20mm threaded anchor rods at a position 100mm below a tunnel portal, wherein the distance between adjacent threaded anchor rods is 600mm, the embedding depth is 400mm, and the exposed length is 200 mm;
(5) drilling holes in the tops of conveying belts with the thickness of 0.1m, the width of 0.7m and the length of 6m, hanging the conveying belts on the exposed parts of seamless steel pipes at the bottom of the retaining wall by using a No. 14 iron wire, wherein the lap joint length of each conveying belt is 0.2m, and hanging and fully paving the whole tunnel portal by using the conveying belts;
(6) drilling holes at the bottom of the conveying belt and fixing the conveying belt on a threaded anchor rod pre-embedded at the bottom of the retaining wall by using a clamp;
(7) steel pipes with the diameter of 48mm are arranged between the threaded anchor rods on the two sides of the tunnel portal to serve as front stop rods, and the distance between every two adjacent steel pipes in the vertical direction is 0.8 m;
(8) after the anti-blast damage buffer damping device for the tunnel portal is installed, blasting and blasting construction is carried out;
(9) after blasting is finished, the conveying belt is integrally hung on the seamless steel pipe at the top of the retaining wall;
(10) moving the inclined strut inside the tunnel portal to the outside of the tunnel portal;
(11) and repeating the steps until no flying stones fly out of the tunnel during blasting and blasting, and finishing the construction of the tunnel opening section.
Claims (8)
1. Big gun damage's buffering damping device is prevented to tunnel entrance to a cave, its characterized in that: including fixing barricade (200) at tunnel entrance to a cave (100) periphery, can dismantle the bracing that sets up in tunnel entrance to a cave (100) and support tunnel entrance to a cave (100) inner wall and hang and shelter from fender curtain (300) in tunnel entrance to a cave (100) the place ahead.
2. The tunnel portal blast damage prevention buffering and damping device of claim 1, wherein: the retaining wall (200) is a concrete retaining wall poured on the periphery of the tunnel portal (100).
3. The tunnel portal blast damage prevention buffering and damping device of claim 1, wherein: the diagonal brace is formed by cross lapping of a bamboo plate and channel steel.
4. The tunnel portal blast damage prevention buffering and damping device of claim 1, wherein: the top of barricade (200) is fixed with a plurality of check curtain connecting pieces (400), check curtain connecting piece (400) are arranged along the length direction of barricade (200) at intervals in proper order, the top of check curtain (300) can be dismantled with check curtain connecting piece (400) and be connected.
5. The tunnel portal blast damage prevention buffering and damping device of claim 4, wherein: the blocking curtain (300) is formed by splicing a plurality of vertically suspended conveying belts, and the conveying belts are paved on the tunnel portal (100) in the vertical direction.
6. The tunnel portal blast damage prevention buffering and damping device of claim 5, wherein: the curtain blocking connecting piece (400) is a steel pipe vertically fixed at the top of the retaining wall (200), and the top of the conveying belt is hung on the corresponding steel pipe.
7. The tunnel portal blast damage prevention buffering and damping device of claim 1, wherein: at least one lateral side thread anchor rod (500) is fixed on each of two sides of the tunnel portal (100), a front stop lever (600) is connected between the two corresponding lateral side thread anchor rods (500), and the front stop lever (600) is located in front of the stop curtain (300).
8. The tunnel portal blast damage prevention buffering and damping device of claim 5, wherein: the bottom of barricade (200) is fixed with a plurality of bottom screw anchor rods (700), and a plurality of bottom screw anchor rods (700) are arranged along the length direction of barricade (200) at interval in proper order, the bottom and the bottom screw anchor rod (700) of conveyer belt articulate.
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| CN202111562816.XA CN114320339A (en) | 2021-12-20 | 2021-12-20 | Buffering damping device for preventing blasting damage of tunnel portal |
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| CN202111562816.XA CN114320339A (en) | 2021-12-20 | 2021-12-20 | Buffering damping device for preventing blasting damage of tunnel portal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115045676A (en) * | 2022-05-12 | 2022-09-13 | 江苏徐工工程机械研究院有限公司 | Multifunctional integrated workstation for tunnel construction |
Citations (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101430180A (en) * | 2008-11-03 | 2009-05-13 | 徐建勇 | Security protection system used for steel reinforced concrete support blasting engineering |
| CN102926805A (en) * | 2012-11-06 | 2013-02-13 | 广西华锡集团股份有限公司铜坑矿 | Flexible wave blocking wall for underground explosion impact disaster protection |
| JP2014227787A (en) * | 2013-05-24 | 2014-12-08 | 株式会社大林組 | Protection device for tunnel blasting |
| CN204228008U (en) * | 2014-10-27 | 2015-03-25 | 中交第二航务工程局有限公司 | A kind of tunnel portal explosion three-dimensional protector being close to existing building |
| JP2015135010A (en) * | 2014-01-17 | 2015-07-27 | 株式会社オリエンタルコンサルタンツ | Scattering stone guard device for tunnel blasting excavation |
| CN105401956A (en) * | 2015-12-24 | 2016-03-16 | 四川川交路桥有限责任公司 | Anti-rock burst and anti-rockfall flexible protection device and construction method for tunnel excavation |
| CN107060774A (en) * | 2017-05-08 | 2017-08-18 | 重庆电讯职业学院 | A kind of anti-tunnel portal wall damage device and construction method |
| CN206930230U (en) * | 2017-03-17 | 2018-01-26 | 周咸领 | A kind of netted blasting protection device of rope class |
| CN206972275U (en) * | 2017-07-03 | 2018-02-06 | 天津润木科技有限公司 | Tunnel Blasting noise abatement anti-splashing protector |
| CN207315446U (en) * | 2017-09-27 | 2018-05-04 | 中国水利水电第十四工程局有限公司 | A kind of Tunnel Blasting protective device |
| CN108444353A (en) * | 2018-04-19 | 2018-08-24 | 宁波交通工程建设集团有限公司 | Tunnel excavation Blasting shock wave protective device and operating method |
| CN109470102A (en) * | 2018-12-27 | 2019-03-15 | 上海绿地建设(集团)有限公司 | A kind of Tunnel Blasting protection bamboo raft reinforcement wall and preparation method thereof |
| KR20190031745A (en) * | 2017-09-18 | 2019-03-27 | 김성호 | Blasting splash prevention device |
| CN208830326U (en) * | 2018-06-22 | 2019-05-07 | 中国水利水电第十四工程局有限公司 | A kind of High Slope Protection device |
| CN110438885A (en) * | 2019-08-16 | 2019-11-12 | 湖南联智桥隧技术有限公司 | A kind of bridge tunnel supporting member |
| CN110985025A (en) * | 2019-12-16 | 2020-04-10 | 中铁一局集团有限公司 | Method for reconstructing shield tunnel to carry out mine construction |
| CN210862412U (en) * | 2019-10-31 | 2020-06-26 | 中国水利水电第八工程局有限公司 | Protection device suitable for high steep side slope goes out hole blasting |
| CN210892889U (en) * | 2019-09-19 | 2020-06-30 | 浙江交工金筑交通建设有限公司 | Multifunctional portal protection device for tunnel portal blasting excavation |
| CN211178169U (en) * | 2019-09-25 | 2020-08-04 | 中国水利水电第十四工程局有限公司 | Protection device for small-size tunnel blasting construction in city |
| CN211422666U (en) * | 2019-11-30 | 2020-09-04 | 云南建投第二水利水电建设有限公司 | Supporting structure for excavation of side slope at inlet and outlet of diversion water delivery tunnel |
| CN211474127U (en) * | 2020-02-13 | 2020-09-11 | 赵先鹏 | Shield constructs portal reinforced structure for track traffic |
| CN112031814A (en) * | 2020-09-17 | 2020-12-04 | 攀钢集团工程技术有限公司 | Cave-entering construction method for crossing shallow-layer high-load highway |
| CN212870955U (en) * | 2020-04-10 | 2021-04-02 | 中建一局集团第五建筑有限公司 | Tunnel excavation blasting shock wave protector |
| CN113217013A (en) * | 2021-06-18 | 2021-08-06 | 杜娟 | Protective structure is used in construction of simple and easy assembled abrupt slope tunnel entrance to a cave |
| CN215003268U (en) * | 2021-06-02 | 2021-12-03 | 贾思源 | Safety protection curtain for tunnel blasting flyrock and shock wave control |
| CN215064152U (en) * | 2021-03-10 | 2021-12-07 | 中交第三公路工程局有限公司 | Mountain tunnel portal blasting flyrock blocking device |
-
2021
- 2021-12-20 CN CN202111562816.XA patent/CN114320339A/en active Pending
Patent Citations (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101430180A (en) * | 2008-11-03 | 2009-05-13 | 徐建勇 | Security protection system used for steel reinforced concrete support blasting engineering |
| CN102926805A (en) * | 2012-11-06 | 2013-02-13 | 广西华锡集团股份有限公司铜坑矿 | Flexible wave blocking wall for underground explosion impact disaster protection |
| JP2014227787A (en) * | 2013-05-24 | 2014-12-08 | 株式会社大林組 | Protection device for tunnel blasting |
| JP2015135010A (en) * | 2014-01-17 | 2015-07-27 | 株式会社オリエンタルコンサルタンツ | Scattering stone guard device for tunnel blasting excavation |
| CN204228008U (en) * | 2014-10-27 | 2015-03-25 | 中交第二航务工程局有限公司 | A kind of tunnel portal explosion three-dimensional protector being close to existing building |
| CN105401956A (en) * | 2015-12-24 | 2016-03-16 | 四川川交路桥有限责任公司 | Anti-rock burst and anti-rockfall flexible protection device and construction method for tunnel excavation |
| CN206930230U (en) * | 2017-03-17 | 2018-01-26 | 周咸领 | A kind of netted blasting protection device of rope class |
| CN107060774A (en) * | 2017-05-08 | 2017-08-18 | 重庆电讯职业学院 | A kind of anti-tunnel portal wall damage device and construction method |
| CN206972275U (en) * | 2017-07-03 | 2018-02-06 | 天津润木科技有限公司 | Tunnel Blasting noise abatement anti-splashing protector |
| KR20190031745A (en) * | 2017-09-18 | 2019-03-27 | 김성호 | Blasting splash prevention device |
| CN207315446U (en) * | 2017-09-27 | 2018-05-04 | 中国水利水电第十四工程局有限公司 | A kind of Tunnel Blasting protective device |
| CN108444353A (en) * | 2018-04-19 | 2018-08-24 | 宁波交通工程建设集团有限公司 | Tunnel excavation Blasting shock wave protective device and operating method |
| CN208830326U (en) * | 2018-06-22 | 2019-05-07 | 中国水利水电第十四工程局有限公司 | A kind of High Slope Protection device |
| CN109470102A (en) * | 2018-12-27 | 2019-03-15 | 上海绿地建设(集团)有限公司 | A kind of Tunnel Blasting protection bamboo raft reinforcement wall and preparation method thereof |
| CN110438885A (en) * | 2019-08-16 | 2019-11-12 | 湖南联智桥隧技术有限公司 | A kind of bridge tunnel supporting member |
| CN210892889U (en) * | 2019-09-19 | 2020-06-30 | 浙江交工金筑交通建设有限公司 | Multifunctional portal protection device for tunnel portal blasting excavation |
| CN211178169U (en) * | 2019-09-25 | 2020-08-04 | 中国水利水电第十四工程局有限公司 | Protection device for small-size tunnel blasting construction in city |
| CN210862412U (en) * | 2019-10-31 | 2020-06-26 | 中国水利水电第八工程局有限公司 | Protection device suitable for high steep side slope goes out hole blasting |
| CN211422666U (en) * | 2019-11-30 | 2020-09-04 | 云南建投第二水利水电建设有限公司 | Supporting structure for excavation of side slope at inlet and outlet of diversion water delivery tunnel |
| CN110985025A (en) * | 2019-12-16 | 2020-04-10 | 中铁一局集团有限公司 | Method for reconstructing shield tunnel to carry out mine construction |
| CN211474127U (en) * | 2020-02-13 | 2020-09-11 | 赵先鹏 | Shield constructs portal reinforced structure for track traffic |
| CN212870955U (en) * | 2020-04-10 | 2021-04-02 | 中建一局集团第五建筑有限公司 | Tunnel excavation blasting shock wave protector |
| CN112031814A (en) * | 2020-09-17 | 2020-12-04 | 攀钢集团工程技术有限公司 | Cave-entering construction method for crossing shallow-layer high-load highway |
| CN215064152U (en) * | 2021-03-10 | 2021-12-07 | 中交第三公路工程局有限公司 | Mountain tunnel portal blasting flyrock blocking device |
| CN215003268U (en) * | 2021-06-02 | 2021-12-03 | 贾思源 | Safety protection curtain for tunnel blasting flyrock and shock wave control |
| CN113217013A (en) * | 2021-06-18 | 2021-08-06 | 杜娟 | Protective structure is used in construction of simple and easy assembled abrupt slope tunnel entrance to a cave |
Non-Patent Citations (5)
| Title |
|---|
| 侯志强;: "临近既有线隧道石方开挖控制***的施工技术", 工程建设与设计, no. 07, pages 163 - 165 * |
| 周国俊;: "永嘉县三塘隧洞分洪应急工程2#支洞口超近距离安全***施工技术", no. 15, pages 251 * |
| 孙纬;肖立勇;: "西岙三线隧道施工技术", 铁道建筑技术, no. 1, pages 213 - 216 * |
| 尹禄修;: "复杂环境下高速铁路双线隧道出洞施工技术", 铁道建筑技术, no. 01, pages 47 - 50 * |
| 赵根, 张正宇, 吴新霞, 唐世来, 唐大龄: "大朝山尾水洞出口1号、2号岩埂拆除***方案设计", 云南水力发电, no. 04, pages 82 - 85 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115045676A (en) * | 2022-05-12 | 2022-09-13 | 江苏徐工工程机械研究院有限公司 | Multifunctional integrated workstation for tunnel construction |
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