CN205206838U - Collapsible loess tunnel supporting construction - Google Patents
Collapsible loess tunnel supporting construction Download PDFInfo
- Publication number
- CN205206838U CN205206838U CN201521061949.9U CN201521061949U CN205206838U CN 205206838 U CN205206838 U CN 205206838U CN 201521061949 U CN201521061949 U CN 201521061949U CN 205206838 U CN205206838 U CN 205206838U
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Abstract
The utility model relates to a tunnel supporting technology field, in particular to collapsible loess tunnel supporting construction. Including concrete filled steel tube support and precast reinforced concrete section of jurisdiction 3, the concrete filled steel tube support set up along tunnel length direction interval, set up a week along the circumference in tunnel, the country rock 8 of tunnel hole wall is hugged closely to the lateral surface of concrete filled steel tube support, precast reinforced concrete section of jurisdiction 3 fill and be fixed in between the two pin concrete filled steel tube supports, concrete filled steel tube support and contact department of precast reinforced concrete section of jurisdiction between 3 are sealed, it builds concrete layer 6 to be provided with the mould on the medial surface of concrete filled steel tube support and precast reinforced concrete section of jurisdiction 3, the concrete filled steel tube support include hollow steel pipe 1 and fill the concrete 2 in 1 inner chamber of hollow steel pipe. This tunnel supporting construction can not only satisfy tunnel structure safety and stability requirement, can improve tunnel construction environment and reduce project cost moreover.
Description
[technical field]
The utility model relates to tunnel support technical field, particularly a kind of collapsible loess tunnel supporting and protection structure.
[background technology]
China's loess and Loessial Soil distribution area about 640,000 km
2, be 6.3% of area, be distributed widely in middle Yellow River regions, from Helan Mountain, east is to Taihang Mountain, and North gets Great Wall, the Qinling Mountains is arrived in south, area about 270,000 km
2, stratum is complete, thickness is large, it is continuous to distribute and many tools settlement by soaking.Collapsible loess is a kind of soil of special nature, and its soil property is comparatively even, short texture, vertical joints development.When not by water-soaked, common intensity is higher, and compressibilty is less.When being subject to water-soaked under a certain pressure, soil structure can be destroyed rapidly, and produce additional comparatively greatly sinking, intensity reduces rapidly.The reason of Loess Collapsibility is caused to be that loess is based on powder and hydrophilic weak mineral, there is macroporous structure, natural moisture content is little, there is the strong Bound moisture link of clay and the cementation inosculation of salinity, a constant load can be born when drying and be out of shape little, but after soaking, grogs link significantly weakens, and causes soil structure to destroy and produces Collapsing Deformation.
Collapsibility of loess is very large to the harm of tunnel structure, construction period often cause surrouding rock deformation to increase rapidly so that cave in, the stressed increase of preliminary bracing even ftractures, the problems such as secondary lining cracking, Tunnel Water Leakage are caused during operation, therefore, tunnel construction is carried out under collapsible loess wall rock condition, the harm that Loess Collapsibility produces tunnel structure should be prevented, the infiltration of anti-sealing be paid special attention to, and take necessary artificial soil improvement or other prophylactico-therapeutic measuress.But, the tunnel of constructing according to New Austrian Tunneling Method is at present generally the supporting method adopting anchor pole to add sprayed mortar, due to must water be entrained with during sprayed mortar, the collapsible loess moisture absorbed in concrete easily becomes unstable, and the mechanism of action of anchor pole in loess tunnel is still not clear, Canal in Loess Area is made to be not suitable for adopting traditional anchor pole to add the support pattern of sprayed mortar.And be applicable to the shield method of weak soil, owing to being adopt mud and water balance principle, have water equally in excavation face, excavation face loess is absorbed water and easily becomes unstable.The supporting scheme also do not carried out under water-less environment in existing method, therefore, the tunnel support structure under the water-less environment of research Canal in Loess Area has great importance.
[utility model content]
For solving the defect that prior art exists, the utility model provides a kind of collapsible loess tunnel supporting and protection structure, and this tunnel support structure can not only meet tunnel structure safety and stability requirement, and can improve tunnel construction environment and reduce construction costs.
The utility model solves the technical scheme that its technical problem adopts:
A kind of collapsible loess tunnel supporting and protection structure, comprise encased structures support and prefabricated reinforced concrete section of jurisdiction 3, described encased structures support is arranged along interval, length of tunnel direction, circumference along tunnel arranges one week, the lateral surface of encased structures support is close to the country rock 8 of Tunnel wall, described prefabricated reinforced concrete section of jurisdiction 3 is filled and is fixed between two Pin encased structures supports, and the contact position between encased structures support and prefabricated reinforced concrete section of jurisdiction 3 seals; The medial surface of encased structures support and prefabricated reinforced concrete section of jurisdiction 3 is provided with form concrete layer 6; The concrete 2 that described encased structures support comprises hollow steel pipe 1 and is filled in hollow steel pipe 1 inner chamber.
Described encased structures support and be provided with waterproofing course 5 between the medial surface of prefabricated reinforced concrete section of jurisdiction 3 and form concrete layer 6, described waterproofing course 5 is close to the medial surface of encased structures support and prefabricated reinforced concrete section of jurisdiction 3, and form concrete layer 6 is close to waterproofing course 5.
The shape of cross section of described hollow steel pipe 1 selects rectangle, and along the circumference in tunnel, hollow steel pipe 1 comprises some segmentations, and hollow steel pipe 1 is provided with several sleeve pipes 7, by sleeve pipe 7 fixed seal connection between adjacent two segmentations.
Described hollow steel pipe 1 offers injected hole and steam vent on the side at top.
Contact position between described encased structures support and prefabricated reinforced concrete section of jurisdiction 3 is sealed by pitch 4.
Be bolted between described prefabricated reinforced concrete section of jurisdiction 3, the seam crossing sealing between adjacent prefabricated reinforced concrete section of jurisdiction 3.
Compared with prior art, the beneficial effects of the utility model are, after tunnel excavation, immediately hollow steel pipe is close to country rock and arranges, hollow steel pipe can provide certain support in time, prevent the country rock in tunnel from relaxing, ensure that subsequent construction is carried out safely; Because hollow steel pipe is lightweight, convenient construction is installed, and significantly can reduce rolled steel dosage, is conducive to reducing construction costs; In hollow steel pipe, fill concrete perfusion (or steel fibrous concrete) form encased structures support afterwards, give full play to steel pipe and this bi-material of concrete advantage separately, form the effect of " 1+1>2 "; Substitute sprayed mortar of the prior art with prefabricated reinforced concrete section of jurisdiction not only can eliminate the lax and relaxation zone of country rock that course of hardening causes and expand, and can tunnel construction environment be improved, realize " dustless " construction; Seam crossing asphalt reperfusion between encased structures support and prefabricated reinforced concrete section of jurisdiction, prevents seam crossing percolating water; The surface concordant with prefabricated reinforced concrete section of jurisdiction at encased structures support arranges tunnel waterproofing layer, complete during can ensureing waterproofing course operation, effectively work; The intensity of form concrete is high, and quality is guaranteed, guarantees that tunnel structure has enough safety factor under the country rock lowering conditions such as rainfall infiltration, immersion disturbance.
[accompanying drawing explanation]
Fig. 1 is cross-sectional configuration schematic diagram of the present utility model;
Fig. 2 is vertical structure schematic sectional view of the present utility model;
Fig. 3 is the structural representation that hollow steel pipe of the present utility model and concrete perfusion are installed;
Fig. 4 is the structural representation that prefabricated reinforced concrete section of jurisdiction of the present utility model is installed.
Position shown in figure, component name and corresponding mark: 1-hollow steel pipe, 2-concrete, 3-prefabricated reinforced concrete section of jurisdiction, 4-pitch, 5-waterproofing course, 6-form concrete layer, 7-sleeve pipe, 8-country rock.
[detailed description of the invention]
Below in conjunction with drawings and Examples, the utility model is described in further detail.
As shown in Figures 1 to 4, a kind of collapsible loess tunnel supporting and protection structure, comprise encased structures support and prefabricated reinforced concrete section of jurisdiction 3, described encased structures support is arranged along interval, length of tunnel direction, circumference along tunnel arranges one week, the lateral surface of encased structures support is close to the country rock 8 of Tunnel wall, described prefabricated reinforced concrete section of jurisdiction 3 is filled and is fixed between two Pin encased structures supports, and the contact position between encased structures support and prefabricated reinforced concrete section of jurisdiction 3 seals; The medial surface of encased structures support and prefabricated reinforced concrete section of jurisdiction 3 is provided with form concrete layer 6; The concrete 2 that described encased structures support comprises hollow steel pipe 1 and is filled in hollow steel pipe 1 inner chamber.
Described encased structures support and be provided with waterproofing course 5 between the medial surface of prefabricated reinforced concrete section of jurisdiction 3 and form concrete layer 6, described waterproofing course 5 is close to the medial surface of encased structures support and prefabricated reinforced concrete section of jurisdiction 3, and form concrete layer 6 is close to waterproofing course 5.
The shape of cross section of described hollow steel pipe 1 selects rectangle, and along the circumference in tunnel, hollow steel pipe 1 comprises some segmentations, and hollow steel pipe 1 is provided with several sleeve pipes 7, by sleeve pipe 7 fixed seal connection between adjacent two segmentations.
Described hollow steel pipe 1 offers injected hole and steam vent, and described injected hole and steam vent are opened in hollow steel pipe 1 on the side at top.
Contact position between described encased structures support and prefabricated reinforced concrete section of jurisdiction 3 is sealed by pitch 4.
Be bolted between described prefabricated reinforced concrete section of jurisdiction 3, the seam crossing sealing between adjacent prefabricated reinforced concrete section of jurisdiction 3.
Described hollow steel pipe is close to Tunnel wall country rock 8 interval immediately and is arranged after tunnel excavation, and around tunnel one week, be in the outermost layer of tunnel support; Fill concrete 2 in hollow steel pipe 1, concrete 2 selects concrete perfusion or steel fibrous concrete, forms encased structures support; Prefabricated reinforced concrete section of jurisdiction 3 is filled between described adjacent two Pin encased structures supports, described prefabricated reinforced concrete section of jurisdiction 3 is concordant with the surface inside encased structures support, the medial surface of encased structures support is hollow steel pipe is in inner side in tunnel after one week surface around tunnel, and the medial surface of prefabricated reinforced concrete section of jurisdiction 3 is the surface being in the same side with the medial surface of encased structures support; Seam crossing asphalt reperfusion 4 between described encased structures support and prefabricated reinforced concrete section of jurisdiction, makes seam crossing therebetween close; The waterproofing course 5 in tunnel is set on the described encased structures support surface concordant with prefabricated reinforced concrete section of jurisdiction and medial surface; In the inner side of described waterproofing course 5, form concrete layer 6 is set.
The cross sectional shape of described hollow steel pipe 1 is rectangle, closely connected combination between encased structures support and prefabricated reinforced concrete section of jurisdiction asphalt reperfusion 4, and described hollow steel pipe is provided with grouting port and steam vent near the side at top.
Be bolted between described prefabricated reinforced concrete segment, form bearing structure.
As depicted in figs. 1 and 2, the supporting and protection structure of a kind of collapsible loess tunnel of the present utility model, comprise institute in hollow steel pipe 1 and hollow steel pipe that tunnel support adopts and fill the concrete 2 poured into, be filled in the prefabricated reinforced concrete section of jurisdiction 3 between two Pin encased structures supports, the pitch 4 that between encased structures support and prefabricated reinforced concrete section of jurisdiction 3, seam crossing pours into, be close to the waterproofing course 5 in the tunnel that the encased structures support surface concordant with prefabricated reinforced concrete section of jurisdiction 3 is arranged, in the inner side of described waterproofing course 5, form concrete layer 6 is set.
Tunnel support is divided into two numbers support, and (near Tunnel wall) of outside is called just, the inside be called two linings, just with between two linings be called waterproofing course, be just main primary structure member, two linings also bear load, and two linings are mainly as safety stock.
Hollow steel pipe 1, the concrete (or steel fibrous concrete) 2 poured in hollow steel pipe 1 and the prefabricated reinforced concrete segment 3 be filled between two Pin encased structures supports form first, hollow steel pipe 1 one week around tunnel, prevent tunnel surrounding from relaxing, timely formation Load-carring arch, but the intensity of hollow steel pipe 1 is relatively low, need the supporting drag that concrete perfusion (or steel fibrous concrete) 2 provides enough, it is to save cost that encased structures support is spaced along length of tunnel direction, fill prefabricated reinforced concrete segment 3 between encased structures support and make the entirety that just Zhi Chengwei mono-is common, be conducive to bearing tunnel load.Tunnel wall is close in one week around tunnel in encased structures support (1 and 2) and prefabricated reinforced concrete section of jurisdiction 3, and waterproofing course is close to first, and form concrete layer is close to waterproofing course.
As shown in Figure 4, the direct one piece of block of prefabricated reinforced concrete segment 3 (illustrated A, B1, B2, C1, C2, D1, D2, E1 and E2) is assembled into a complete tunnel cross-section structure, forms an annular, is similar to shield machine segment assembled.
Concrete enforcement sets up hollow steel pipe 1 immediately after the short drilling depth excavation in tunnel, weld together with several longitudinal reinforcements between hollow steel pipe 1, ensure the stable of hollow steel pipe 1, avoid hollow steel pipe unstability, then the injected hole offered from hollow steel pipe 1 is to concrete perfusion in hollow steel pipe (or steel fibrous concrete) 2, hollow steel pipe 1 is exhausted by steam vent simultaneously, make concrete 2 fully can fill up the inner chamber of hollow steel pipe 1, between two Pin encased structures supports, fill prefabricated reinforced concrete segment 3 makes encased structures support (1 and 2) and prefabricated reinforced concrete section of jurisdiction 3 jointly form a whole, then on the surface that steel pipe concrete bracket is concordant with reinforced concrete segment, waterproofing course is installed, secondary lining is performed again when treating that surrouding rock deformation tends towards stability.Thus under anhydrous environment, complete the supporting of loess tunnel.
A kind of collapsible loess tunnel supporting and protection structure of the present utility model, be intended to the adverse effect that elimination constructing tunnel water causes Loess Collapsibility to cause constructing tunnel, make tunnel structure meet safety and stability requirement, improve tunnel construction environment simultaneously and reduce construction costs.After tunnel excavation, be close to country rock 8 immediately hollow steel pipe 1 is set, make hollow steel pipe 1 form temporary support structures; Concrete perfusion (or steel fibrous concrete) 2 in hollow steel pipe 1, makes hollow steel pipe 1 and concrete 2 jointly form encased structures support; Between two adjacent Pin encased structures supports, fill prefabricated reinforced concrete section of jurisdiction 3, institute's prefabricated reinforced concrete section of jurisdiction is concordant with concrete filled steel tube surface; Seam crossing asphalt reperfusion 4 between encased structures support and prefabricated reinforced concrete section of jurisdiction 3, makes seam crossing therebetween close; On the surface that encased structures support is concordant with prefabricated reinforced concrete section of jurisdiction, waterproofing course 5 is set; Form concrete layer 6 is set in the inner side of waterproofing course 5, forms secondary lining, as safety stock.
The beneficial effects of the utility model are, adopt hollow steel pipe can provide certain support in time, prevent country rock from relaxing; The encased structures support formed after slip casting and prefabricated reinforced concrete section of jurisdiction can provide enough supporting drags, meet tunnel structure and stablize and supporting and protection structure safety requirements; Encased structures support is concordant with surface, prefabricated reinforced concrete section of jurisdiction, complete during ensureing the operation of guarded drainage system, effectively work; The intensity of form concrete is high, and quality is guaranteed, guarantees that tunnel structure has enough safety factor under the country rock lowering conditions such as rainfall infiltration, immersion disturbance.
Some principles of a kind of collapsible loess tunnel supporting and protection structure of the above the utility model that just explains through diagrams, be not the utility model to be confined to shown in and in described concrete structure and the scope of application, therefore every corresponding modify of being likely utilized and equivalent, all belong to the scope of the claims that the utility model is applied for.
Claims (6)
1. a collapsible loess tunnel supporting and protection structure, it is characterized in that, comprise encased structures support and prefabricated reinforced concrete section of jurisdiction (3), described encased structures support is arranged along interval, length of tunnel direction, circumference along tunnel arranges one week, the lateral surface of encased structures support is close to the country rock (8) of Tunnel wall, described prefabricated reinforced concrete section of jurisdiction (3) is filled and is fixed between two Pin encased structures supports, contact position between encased structures support and prefabricated reinforced concrete section of jurisdiction (3) seals, the medial surface of encased structures support and prefabricated reinforced concrete section of jurisdiction (3) is provided with form concrete layer (6), described encased structures support comprises hollow steel pipe (1) and is filled in the concrete (2) in hollow steel pipe (1) inner chamber.
2. a kind of collapsible loess tunnel supporting and protection structure according to claim 1, it is characterized in that, waterproofing course (5) is provided with between the medial surface of described encased structures support and prefabricated reinforced concrete section of jurisdiction (3) and form concrete layer (6), described waterproofing course (5) is close to the medial surface of encased structures support and prefabricated reinforced concrete section of jurisdiction (3), and form concrete layer (6) is close to waterproofing course (5).
3. a kind of collapsible loess tunnel supporting and protection structure according to claim 1, it is characterized in that, the shape of cross section of described hollow steel pipe (1) selects rectangle, along the circumference in tunnel, hollow steel pipe (1) comprises some segmentations, and hollow steel pipe (1) is provided with several sleeve pipes (7), by sleeve pipe (7) fixed seal connection between adjacent two segmentations.
4. a kind of collapsible loess tunnel supporting and protection structure according to claim 1 or 3, is characterized in that, described hollow steel pipe (1) offers injected hole and steam vent on the side at top.
5. a kind of collapsible loess tunnel supporting and protection structure according to claim 1, is characterized in that, the contact position between described encased structures support and prefabricated reinforced concrete section of jurisdiction (3) is sealed by pitch (4).
6. a kind of collapsible loess tunnel supporting and protection structure according to claim 1, it is characterized in that, be bolted between described prefabricated reinforced concrete section of jurisdiction (3), the seam crossing sealing between adjacent prefabricated reinforced concrete section of jurisdiction (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521061949.9U CN205206838U (en) | 2015-12-17 | 2015-12-17 | Collapsible loess tunnel supporting construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521061949.9U CN205206838U (en) | 2015-12-17 | 2015-12-17 | Collapsible loess tunnel supporting construction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205206838U true CN205206838U (en) | 2016-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521061949.9U Expired - Fee Related CN205206838U (en) | 2015-12-17 | 2015-12-17 | Collapsible loess tunnel supporting construction |
Country Status (1)
| Country | Link |
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| CN (1) | CN205206838U (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107044288A (en) * | 2017-05-22 | 2017-08-15 | 中铁第勘察设计院集团有限公司 | Prefabricated support lining structure and construction method for large-deformation tunnel in soft rock |
| CN107725068A (en) * | 2017-11-06 | 2018-02-23 | 山东建筑大学 | A kind of assembled supporting construction and its construction method based on outside steel arch-shelf and inner side concrete slab |
| CN108547635A (en) * | 2018-03-15 | 2018-09-18 | 华能西藏雅鲁藏布江水电开发投资有限公司 | A kind of pipe-plate lining replaces tunnel surrounding reinforcement means with combined bolting and shotcrete |
| CN109611116A (en) * | 2019-01-28 | 2019-04-12 | 中铁第四勘察设计院集团有限公司 | A kind of the pipe-plate lining structure and its construction method of suitable for surrounding rock large deformation |
| CN109882207A (en) * | 2019-03-28 | 2019-06-14 | 中铁十六局集团第一工程有限公司 | The interim horizontal support in double -side approach tunnel, support device and its assembly, method for dismounting |
| CN110056371A (en) * | 2019-05-28 | 2019-07-26 | 长安大学 | A kind of tunnel morning strong supporting system and its installation method |
| CN110259485A (en) * | 2019-07-19 | 2019-09-20 | 长安大学 | A kind of loess tunnel support system and its installation method |
| CN111022084A (en) * | 2019-11-19 | 2020-04-17 | 长安大学 | Large-section loess tunnel excavation primary support arch frame single truss and method |
| CN111425216A (en) * | 2020-04-09 | 2020-07-17 | 山东建筑大学 | Composite supporting structure, construction system and method |
| CN114320349A (en) * | 2021-12-30 | 2022-04-12 | 山东交通学院 | Primary support structure of highway tunnel and construction method |
| CN111022084B (en) * | 2019-11-19 | 2024-04-26 | 长安大学 | Single arch truss of primary support for excavating large-section loess tunnel and method |
-
2015
- 2015-12-17 CN CN201521061949.9U patent/CN205206838U/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107044288A (en) * | 2017-05-22 | 2017-08-15 | 中铁第勘察设计院集团有限公司 | Prefabricated support lining structure and construction method for large-deformation tunnel in soft rock |
| CN107725068A (en) * | 2017-11-06 | 2018-02-23 | 山东建筑大学 | A kind of assembled supporting construction and its construction method based on outside steel arch-shelf and inner side concrete slab |
| CN108547635A (en) * | 2018-03-15 | 2018-09-18 | 华能西藏雅鲁藏布江水电开发投资有限公司 | A kind of pipe-plate lining replaces tunnel surrounding reinforcement means with combined bolting and shotcrete |
| CN109611116A (en) * | 2019-01-28 | 2019-04-12 | 中铁第四勘察设计院集团有限公司 | A kind of the pipe-plate lining structure and its construction method of suitable for surrounding rock large deformation |
| CN109882207A (en) * | 2019-03-28 | 2019-06-14 | 中铁十六局集团第一工程有限公司 | The interim horizontal support in double -side approach tunnel, support device and its assembly, method for dismounting |
| CN110056371A (en) * | 2019-05-28 | 2019-07-26 | 长安大学 | A kind of tunnel morning strong supporting system and its installation method |
| CN110259485A (en) * | 2019-07-19 | 2019-09-20 | 长安大学 | A kind of loess tunnel support system and its installation method |
| CN111022084A (en) * | 2019-11-19 | 2020-04-17 | 长安大学 | Large-section loess tunnel excavation primary support arch frame single truss and method |
| CN111022084B (en) * | 2019-11-19 | 2024-04-26 | 长安大学 | Single arch truss of primary support for excavating large-section loess tunnel and method |
| CN111425216A (en) * | 2020-04-09 | 2020-07-17 | 山东建筑大学 | Composite supporting structure, construction system and method |
| CN111425216B (en) * | 2020-04-09 | 2021-07-30 | 山东建筑大学 | Composite supporting structure, construction system and method |
| US11739639B2 (en) | 2020-04-09 | 2023-08-29 | Shandong Jianzhu University | Composite support structure, construction system, and method |
| CN114320349A (en) * | 2021-12-30 | 2022-04-12 | 山东交通学院 | Primary support structure of highway tunnel and construction method |
| CN114320349B (en) * | 2021-12-30 | 2023-09-08 | 山东交通学院 | Highway tunnel primary support structure and construction 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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160504 Termination date: 20161217 |