CN204419195U - A kind of supporting and protection structure pattern being applicable to tunnel portal section - Google Patents

A kind of supporting and protection structure pattern being applicable to tunnel portal section Download PDF

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Publication number
CN204419195U
CN204419195U CN201420853315.6U CN201420853315U CN204419195U CN 204419195 U CN204419195 U CN 204419195U CN 201420853315 U CN201420853315 U CN 201420853315U CN 204419195 U CN204419195 U CN 204419195U
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CN
China
Prior art keywords
retaining
tunnel portal
tunnel
pattern
applicable
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201420853315.6U
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Chinese (zh)
Inventor
薛晓辉
张军
宿钟鸣
孙志杰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanxi Province Transport Science Research Institute
Shanxi Jiaoke Highway Survey and Design Institute
Original Assignee
Shanxi Province Transport Science Research Institute
Shanxi Jiaoke Highway Survey and Design Institute
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Application filed by Shanxi Province Transport Science Research Institute, Shanxi Jiaoke Highway Survey and Design Institute filed Critical Shanxi Province Transport Science Research Institute
Priority to CN201420853315.6U priority Critical patent/CN204419195U/en
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Publication of CN204419195U publication Critical patent/CN204419195U/en
Expired - Fee Related legal-status Critical Current
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Abstract

The utility model discloses a kind of supporting and protection structure pattern being applicable to tunnel portal section, comprise retaining wall, pre-reinforcement bolt, cover arch, pre-buried pipe sleeve, Guan Liang, connecting reinforcement, backfill, prestress anchorage cable, injecting cement paste and anchor head; Described retaining wall is arranged on the lower side of tunnel portal physical features, and pre-reinforcement stake is arranged on the opposite side of tunnel portal.The utility model both make use of the advantage that retaining wall base stress is more balanced and wall body stability is strong, prestress anchorage cable is utilized again to reinforce backfill, improve the physico mechanical characteristic of tunnel vault backfill, strengthen country rock above tunnel vault from arching effect, ensure the resistance to overturning of country rock and tunnel structure, therefore to tunnel portal section, there is good compliance, mechanical property is better, effectively prevent Portal Section slump, ensure that carrying out smoothly of " shallow buried covered excavation ", there is higher economic benefit and social benefit.

Description

A kind of supporting and protection structure pattern being applicable to tunnel portal section
Technical field
The utility model belongs to tunnels and underground engineering field, is specifically related to a kind of supporting and protection structure pattern being applicable to tunnel portal section.
Background technology
Along with the development of China's transport development cause, the traversing shallow-buried bias voltage landform of freeway tunnel gets more and more, and especially at tunnel portal position, because rock crusher is loose, rate of decay is high, very easily causes landslide, caves in.For tackling these problems, people begin one's study and are applicable to the cover arch structure pattern of tunnel portal section.But traditional supporting and protection structure form due to the engineering properties of backfill above vault poor, cannot be formed " arching ", its gravity pressure directly acts on cover arch or tunnel portal, very easily causes the generation of the diseases such as cover dome portions cracking, can not adapt to the construction of tunnel portal section preferably.
Utility model content
The purpose of this utility model is the deficiency existed for prior art, provides a kind of supporting and protection structure pattern being applicable to tunnel portal section.
The purpose of this utility model is the deficiency existed for prior art, a kind of supporting and protection structure pattern being applicable to tunnel portal section is provided, comprise retaining wall, pre-reinforcement bolt, cover arch, pre-buried pipe sleeve, Guan Liang, connecting reinforcement, backfill, prestress anchorage cable, injecting cement paste and anchor head; Described retaining wall is arranged on the lower side of tunnel portal physical features, and pre-reinforcement stake is arranged on the opposite side of tunnel portal; Described retaining wall is also provided with a bearing platform, and described service sleeve is arranged on this bearing platform, and described connecting reinforcement is arranged in this service sleeve; Described Guan Liang is arranged in pre-reinforcement stake; Described cover bow member is located on tunnel vault, and in the both sides of the cover arch bearing platform that is arranged on retaining wall respectively by connecting reinforcement and Guan Liang and pre-reinforcement stake, backfilled by backfill between described tunnel vault and retaining wall, described prestress anchorage cable is laid in this backfill, and one end of prestress anchorage cable is anchored in country rock by injecting cement paste, the other end is anchored in retaining wall by anchor head.
As preferably, described cover arch is returned with the angle of the bearing platform of retaining wall and is filled with coarse material, and is also provided with spilled water hole at this place.Coarse material is for overlapping the buffering and reinforcement effect of encircleing between retaining wall bearing platform, and spilled water hole can be used to the accumulation getting rid of some natural rain and Pipeline Water, prevents corrosion cover arch and load bearing wall.
As preferably, be also arranged circumferentially pipe canopy in described cover arch, and pipe canopy adopts the steel floral tube of Φ 108mm.It is inner that pipe canopy is used for rigidized cover arch, increases mechanical characteristic.
As preferably, between described anchor head and retaining wall, be also provided with angle board.Angle board, for adjusting the anchoring angle between anchor head and retaining wall, is guaranteed that anchor head can carry out with retaining wall the splicing that fits together perfectly, and is played the effect cushioning rigidity power between the two simultaneously, make overall structure more firm.
As preferably, described service sleeve is the sleeve pipe of four Φ 125mm.Bottom and the connecting reinforcement be arranged in sleeve pipe of service sleeve are all embedded on bearing platform, for connecting arch cover, the setting of service sleeve quantity and diameter should meet the demand of bearing platform upper stress, stress too much can be caused excessive, cause crumbling of bearing platform, cross I haven't seen you for ages cause with cover encircle be connected insecure.
As preferably, described spilled water hole is arranged by the PVC drain pipe of Φ 110mm and forms.
As preferably, described backfill is rubble class soil, and maximum particle diameter is not more than 50mm, and every layer of paving soil thickness is not more than 300mm.Backfill is laid between tunnel vault and retaining wall, is namely laid between cover arch and retaining wall, lays simple flow, can lay multilayer by gravelly soil.
As preferably, described prestress anchorage cable is the steel strand of 7 Φ 15.2mm.
As preferably, described injecting cement paste is the cement mortar of M35, and slip casting length is 2.0m.
Beneficial effect: the utility model has the following advantages compared to the supporting and protection structure pattern of traditional tunnel portal section: the utility model both make use of the advantage that retaining wall base stress is more balanced and wall body stability is strong, prestress anchorage cable is utilized again to reinforce backfill, improve the physico mechanical characteristic of tunnel vault backfill, strengthen country rock above tunnel vault from arching effect, ensure the resistance to overturning of country rock and tunnel structure, therefore to tunnel portal section, there is good compliance, mechanical property is better, effectively prevent Portal Section slump, ensure that carrying out smoothly of " shallow buried covered excavation ", there is higher economic benefit and social benefit.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation;
Fig. 2 is the structural representation of prestress anchorage cable of the present utility model;
Wherein, 1-retaining wall, 2-pre-reinforcement bolt, 3-overlap arch, 4-pre-buried pipe sleeve, 5-Guan Liang, 6-connecting reinforcement Guan Liang, 7-backfill, 8-prestress anchorage cable, 9-injecting cement paste, 10-anchor head, 11-coarse material backfill, 12-spilled water hole, 13-pipe canopy, 14-angle board.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, illustrate the utility model further, the present embodiment is implemented under premised on technical solutions of the utility model, should understand these embodiments and only be not used in restriction scope of the present utility model for illustration of the utility model.
As shown in Figure 1 to Figure 2, a kind of supporting and protection structure pattern being applicable to tunnel portal section, comprises retaining wall 1, pre-reinforcement bolt 2, cover arch 3, pre-buried pipe sleeve 4, hat beam 5, connecting reinforcement 6, backfill 7, prestress anchorage cable 8, injecting cement paste 9 and anchor head 10.
Retaining wall 1 is wherein arranged on the lower side of tunnel portal physical features, C25 concrete is adopted to carry out the wall pouring of retaining wall 1, body of wall height is 27m, retaining wall 1 is also provided with on a bearing platform, and pre-plugged four Φ 125mm service sleeves 4, connecting reinforcement 6 is arranged in this service sleeve 4, and bearing platform and body of wall angle are provided with the spilled water hole 12 that Φ 110mmPVC gutter makes.
And pre-reinforcement stake 2 is arranged on the higher opposite side of tunnel portal physical features, pre-reinforcement stake 2 adopts bored pile, and stake footpath is 0.5m, pile body is long is 10m, hat beam 5 is arranged in this pre-reinforcement stake 2, and the sectional dimension of hat beam 5 is 0.75m × 0.5m, and C25 concrete can be adopted to pour into a mould
Cover arch 3 is erected on tunnel vault, and in the both sides of cover arch 3 bearing platform that is arranged on retaining wall 1 respectively by connecting reinforcement 6 and hat beam 5 and pre-reinforcement stake 2, the thickness of cover arch 3 is 0.5m, C20 concrete can be adopted to pour into a mould, in cover arch 3, hoop is provided with pipe canopy 13, and pipe canopy 13 can adopt Φ 108mm steel floral tube.
Backfilled by backfill 7 between tunnel vault and retaining wall 1, backfill 11 should select rubble class soil, and maximum particle diameter is not more than 50mm, and every layer of paving soil thickness is not more than 300mm; Prestress anchorage cable 8 is laid in this backfill 7, and one end of prestress anchorage cable 8 is anchored in country rock by injecting cement paste 9, and the other end utilizes ground tackle to carry out stretch-draw, after stretch-draw completes, utilizes anchor head 10 to be anchored on retaining wall 1.
By laying prestress anchorage cable 8 in backfill 7, and be anchored on country rock and retaining wall 1, when carrying out " shallow buried covered excavation " in tunnel, first the pressure from surrounding rock of tunnel vault can be discharged in backfill 7, the larger pressure of country rock can be born by the fastening of prestress anchorage cable 8, alleviate tunnel vault overlaps arch 3 pressure initiation from arching effect, ensure the stability of country rock and tunnel structure entirety, effectively prevent caving in of Portal Section.
Prestress anchorage cable 8 is wherein the steel strand of 7 Φ 15.2mm, and injecting cement paste 9 is the cement mortar of M35, and slip casting length is 2.0m.

Claims (9)

1. one kind is applicable to the supporting and protection structure pattern of tunnel portal section, it is characterized in that: comprise retaining wall (1), pre-reinforcement bolt (2), cover arch (3), pre-buried pipe sleeve (4), Guan Liang (5), connecting reinforcement (6), backfill (7), prestress anchorage cable (8), injecting cement paste (9) and anchor head (10); Described retaining wall (1) is arranged on the lower side of tunnel portal physical features, and pre-reinforcement stake (2) is arranged on the opposite side of tunnel portal; Described retaining wall (1) is also provided with a bearing platform, and described service sleeve (4) is arranged on this bearing platform, and described connecting reinforcement (6) is arranged in this service sleeve (4); Described Guan Liang (5) is arranged in pre-reinforcement stake (2); Described cover arch (3) is erected on tunnel vault, and in the both sides of cover arch (3) bearing platform that is arranged on retaining wall (1) respectively by connecting reinforcement (6) and Guan Liang (5) and pre-reinforcement stake (2), backfilled by backfill (7) between described tunnel vault and retaining wall (1), described prestress anchorage cable (8) is laid in this backfill (7), and one end of prestress anchorage cable (8) is anchored in country rock by injecting cement paste (9), the other end is anchored in retaining wall (2) by anchor head (10).
2. a kind of supporting and protection structure pattern being applicable to tunnel portal section according to claim 1, it is characterized in that: described cover arch (3) is returned with the angle of the bearing platform of retaining wall (2) and is filled with coarse material (11), and is also provided with spilled water hole (12) at this place.
3. a kind of supporting and protection structure pattern being applicable to tunnel portal section according to claim 1, is characterized in that: be also arranged circumferentially pipe canopy (13) in described cover arch (3), and pipe canopy (13) adopts the steel floral tube of Φ 108mm.
4. a kind of supporting and protection structure pattern being applicable to tunnel portal section according to claim 1, is characterized in that: be also provided with angle board (14) between described anchor head (10) and retaining wall (2).
5. a kind of supporting and protection structure pattern being applicable to tunnel portal section according to claim 1, is characterized in that: described service sleeve (4) is the sleeve pipe of four Φ 125mm.
6. a kind of supporting and protection structure pattern being applicable to tunnel portal section according to claim 2, is characterized in that: described spilled water hole (12) is arranged by the PVC drain pipe of Φ 110mm and forms.
7. a kind of supporting and protection structure pattern being applicable to tunnel portal section according to claim 1, is characterized in that: described backfill (7) is rubble class soil, and maximum particle diameter is not more than 50 mm, and every layer of paving soil thickness is not more than 300 mm.
8. a kind of supporting and protection structure pattern being applicable to tunnel portal section according to claim 1, is characterized in that: described prestress anchorage cable (8) is the steel strand of 7 Φ 15.2mm.
9. a kind of supporting and protection structure pattern being applicable to tunnel portal section according to claim 1, it is characterized in that: the cement mortar that described injecting cement paste (9) is M35, slip casting length is 2.0 m.
CN201420853315.6U 2014-12-29 2014-12-29 A kind of supporting and protection structure pattern being applicable to tunnel portal section Expired - Fee Related CN204419195U (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106223989A (en) * 2016-08-10 2016-12-14 兰州理工大学 Unsymmetrial loading tunnel hole excavation safeguard structure and construction method
CN106638509A (en) * 2017-01-04 2017-05-10 中国电建集团贵阳勘测设计研究院有限公司 Tunnel structure capable of reducing slope excavation and construction method thereof
CN106907162A (en) * 2017-05-08 2017-06-30 重庆电讯职业学院 A kind of construction method of the supporting of anti-tunnel portal unstability
CN107060837A (en) * 2017-03-23 2017-08-18 中铁十六局集团第五工程有限公司 A kind of asymmetric formula shield arch construction method of Shallow-buried
CN108661669A (en) * 2018-04-28 2018-10-16 中铁六局集团天津铁路建设有限公司 It is a kind of suitable for Shallow-buried section and under wear the method for tunnel construction of shallow-buried water-rich section
CN109958452A (en) * 2019-03-14 2019-07-02 中铁十局集团西北工程有限公司 A kind of tunnel exit slips the body control method that collapses
CN110056369A (en) * 2019-05-05 2019-07-26 中交第三航务工程局有限公司 A kind of construction method at tunnel's entrance and exit hole
CN110374633A (en) * 2019-07-19 2019-10-25 中铁隧道集团二处有限公司 The Portal Section Construction method of Tunnel Passing loose media
CN111594229A (en) * 2020-05-28 2020-08-28 中国建筑第七工程局有限公司 Construction method for multi-arch tunnel entrance under shallow-buried water-rich geological condition
CN112127900A (en) * 2020-09-07 2020-12-25 中国水利水电第十四工程局有限公司 Construction method for hidden half-wall and half-arch protection structure of exposed arch of shallow-buried bias tunnel penetrating through accumulation body

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106223989A (en) * 2016-08-10 2016-12-14 兰州理工大学 Unsymmetrial loading tunnel hole excavation safeguard structure and construction method
CN106223989B (en) * 2016-08-10 2018-01-16 兰州理工大学 Excavate safeguard structure and construction method in unsymmetrial loading tunnel hole
CN106638509A (en) * 2017-01-04 2017-05-10 中国电建集团贵阳勘测设计研究院有限公司 Tunnel structure capable of reducing slope excavation and construction method thereof
CN107060837A (en) * 2017-03-23 2017-08-18 中铁十六局集团第五工程有限公司 A kind of asymmetric formula shield arch construction method of Shallow-buried
CN107060837B (en) * 2017-03-23 2019-08-13 中铁十六局集团第五工程有限公司 A kind of Shallow-buried asymmetry formula shield arch construction method
CN106907162A (en) * 2017-05-08 2017-06-30 重庆电讯职业学院 A kind of construction method of the supporting of anti-tunnel portal unstability
CN108661669A (en) * 2018-04-28 2018-10-16 中铁六局集团天津铁路建设有限公司 It is a kind of suitable for Shallow-buried section and under wear the method for tunnel construction of shallow-buried water-rich section
CN109958452A (en) * 2019-03-14 2019-07-02 中铁十局集团西北工程有限公司 A kind of tunnel exit slips the body control method that collapses
CN110056369A (en) * 2019-05-05 2019-07-26 中交第三航务工程局有限公司 A kind of construction method at tunnel's entrance and exit hole
CN110374633A (en) * 2019-07-19 2019-10-25 中铁隧道集团二处有限公司 The Portal Section Construction method of Tunnel Passing loose media
CN111594229A (en) * 2020-05-28 2020-08-28 中国建筑第七工程局有限公司 Construction method for multi-arch tunnel entrance under shallow-buried water-rich geological condition
CN111594229B (en) * 2020-05-28 2021-08-20 中建七局交通建设有限公司 Construction method for multi-arch tunnel entrance under shallow-buried water-rich geological condition
CN112127900A (en) * 2020-09-07 2020-12-25 中国水利水电第十四工程局有限公司 Construction method for hidden half-wall and half-arch protection structure of exposed arch of shallow-buried bias tunnel penetrating through accumulation body

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20150624

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