CN203547773U - Channel combined support structure suitable for slowly inclined stratified rock mass - Google Patents
Channel combined support structure suitable for slowly inclined stratified rock mass Download PDFInfo
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- CN203547773U CN203547773U CN201320655835.1U CN201320655835U CN203547773U CN 203547773 U CN203547773 U CN 203547773U CN 201320655835 U CN201320655835 U CN 201320655835U CN 203547773 U CN203547773 U CN 203547773U
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- 239000011435 rock Substances 0.000 title claims abstract description 66
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 43
- 239000010959 steel Substances 0.000 claims abstract description 43
- 239000004570 mortar (masonry) Substances 0.000 claims description 20
- 210000005239 tubule Anatomy 0.000 claims description 14
- 210000003205 muscle Anatomy 0.000 claims description 9
- 238000009412 basement excavation Methods 0.000 abstract description 15
- 238000010276 construction Methods 0.000 abstract description 8
- 239000004567 concrete Substances 0.000 abstract description 6
- 230000003014 reinforcing effect Effects 0.000 abstract description 2
- 230000008093 supporting effect Effects 0.000 description 21
- 239000010410 layer Substances 0.000 description 11
- 230000008901 benefit Effects 0.000 description 4
- 230000006378 damage Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000002787 reinforcement Effects 0.000 description 4
- 238000005728 strengthening Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 235000019994 cava Nutrition 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000001687 destabilization Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000266 injurious effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012913 prioritisation Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000011378 shotcrete Substances 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
- 238000002910 structure generation Methods 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
A channel combined support structure suitable for a slowly inclined stratified rock mass is used for effectively reinforcing a channel top plate rock mass, controlling the deformation and instability of surrounding rock, ensuring the rock stability at the arch top, fully ensuring the stability of surrounding rock and the support after excavation, maintaining the stability of an excavated surface, reducing the settling quantity of the arch top and ensuring construction safety. The channel combined support structure suitable for the slowly inclined stratified rock mass comprises a grating steel frame (1), a jetting concrete arch section (2), jetting concrete edge wall sections (3), arch part radial anchor rods (4) and advance anchor rods or advance small guide pipes (5); the arch radial anchor rods (4) and the advance anchor rod or advance small guide pipes (5) are arranged in a range of 120 degrees and are firmly connected with the grating steel frame (1); longitudinal steel bars (9) are arranged in the grating steel frame (1).
Description
Technical field
The utility model relates to railway tunnel, particularly a kind of tunnel combined support structure that is applicable to the slow beded rock mass that inclines.
Background technology
Rock mass structure can be divided into complete structure, block structure, cataclastic texture, layer structure, the large class of prose style free from parallelism structure five conventionally, the analysis of stratified rock mass structure classification that the aspect of wherein take is structural plane can be divided into alternating layers, interbed, thin layer and soft formation, and its intensity is controlled by the destruction of sillar intensity, structural plane intensity, rock stratum face and maximum principal plane angle and generation mainly.The beded rock mass that the slow beded rock mass that inclines refers to that rock stratum face and horizontal plane angle are less than 20～30 °, be generally sedimentary rock, can be formed by single lithology, also can be combined by different lithology alternating layers or interlayer, aspect often has the interlayer changing of the relative positions, aspect adhesion a little less than, its destruction mostly is that top curved is sunk and produce absciss layer, when deflection is larger, the layering destruction that occurs fractureing.At layering, good and weak intercalated layer is grown, is excavated large span tunnel in the slow beded rock mass inclining of occurrence, hole top girth rock stability problem is outstanding, in beded rock mass, a large amount of slow shape structural planes that incline of depositing of composing easily cause tunnel thin layer and medium bed roof strata to sink to fractureing, if supporting intensity rigidity not or support time not in time, very easily there is inbreak in vault rock stratum, and inbreak span successively decreases from the bottom up successively, finally form the slump space of notch cuttype, stable unfavorable especially to arch crown part.
It is the New Austrian Tunneling Method construction of core that current tunnel generally adopts Shotcrete Rockbolt Support Technique, preliminary bracing layer is comprised of anchor pole, steel mesh reinforcement, sprayed mortar etc., anchor pole, steel mesh reinforcement are evenly arranged along arch wall position conventionally, sprayed mortar layer thickness equates along arch wall position thickness, the supporting and protecting system of tunnel of this routine is not had a specific aim in the slow beded rock mass that inclines, both having caused the waste of engineering material and investment,, easily there is engineering accident in the problem that simultaneously can not emphasis solves the inbreak of rock stratum, arch, caves in.Therefore need the special supporting structural system that solves arch, tunnel stability for the slow beded rock mass primary study that inclines badly.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of tunnel combined support structure that is applicable to the slow beded rock mass that inclines, with effective Strengthening Tunnel roof rock mass, deformation controlling for rock surrounding gateways and unstability, guarantee arch Rock Slide Stability, fully guarantee the stable of the rear country rock of excavation and supporting, and it is stable to maintain excavation face, reduces vault settling amount, guarantee construction safety.
The technical scheme that the purpose of this utility model adopts is as follows:
The utility model is applicable to the tunnel combined support structure of the slow beded rock mass that inclines, comprise grid steel frame, sprayed mortar arch section, sprayed mortar abutment wall section, arch radially anchor pole, advance anchor bolt or advanced tubule, it is characterized in that: described arch radially anchor pole, advance anchor bolt or advanced tubule is disposed within the scope of 120 ° of arch, and be firmly connected with grid steel frame, between grid steel frame, establish longitudinal dowel.
The beneficial effects of the utility model are, for the slow beded rock mass tunnel excavation destructive characteristics of inclining, emphasis is strengthened the strength and stiffness of arch supporting and protection structure, effective Strengthening Tunnel roof rock mass, deformation controlling for rock surrounding gateways and unstability, assurance arch Rock Slide Stability; The combining structure that leading pre-supporting and arch add strong supporting fully guarantees to excavate the stable of rear country rock and supporting, and it is stable to maintain excavation face, reduces vault settling amount, guarantees construction safety; Structure is light and handy, and manufacture craft is simple, installs and sets up conveniently, and stress condition is good, and energy immediate support, bears load fast, at the surrouding rock deformation initial stage, can effectively control distortion, prevents country rock generation injurious deformation; Cost savings, grid steel frame steel using amount is few, economical aspect is far superior to profile steel frame, artificial and machinery expenses also greatly reduces, cancel the little abutment wall anchor pole of use simultaneously, in the better situation of abutment wall wall rock condition, attenuate sprayed mortar thickness, cancellation abutment wall grid, save great amount of investment, guaranteeing to produce huge economy and social benefit in safe construction situation; Speed of application is fast, and the grid set-up time is short, and has saved abutment wall anchor pole and grid applies the time, can realize slow tunnel, the rock stratum quick supporting construction of inclining.
Accompanying drawing explanation
This manual comprises following five width accompanying drawings:
Fig. 1 is the profile that the utility model is applicable to the tunnel combined support structure embodiment 1 of the slow beded rock mass that inclines;
Fig. 2 is the sectional view along A-A line in Fig. 1;
Fig. 3 is the zoomed-in view of Local C in Fig. 1;
Fig. 4 is the profile that the utility model is applicable to the tunnel combined support structure embodiment 2 of the slow beded rock mass that inclines;
Fig. 5 is the sectional view along B-B line in Fig. 4;
Toponym and corresponding mark in figure: grid steel frame 1, sprayed mortar arch section 2, sprayed mortar abutment wall section 3, arch radially anchor pole 4, advance anchor bolt or advanced tubule 5, lock pin anchor tube 6, steel mesh reinforcement 13, face 7, get out of a predicament or an embarrassing situation not excavation portion 8, longitudinal dowel 9, pading plate 10, the main muscle 11 of grid, grid contact radially rock-bolt length l of muscle 12, arch
1, circumferential distance d
1, longitudinal pitch d
2, grid steel frame longitudinal pitch d
3, advance anchor bolt or ductule length l
2, longitudinal pitch d
4, top bar height h
1, get out of a predicament or an embarrassing situation height h
2, overall height H.
The specific embodiment
Below in conjunction with accompanying drawing and example, the utility model is further illustrated.
With reference to Fig. 1, Fig. 2 and Fig. 3, the utility model is applicable to the tunnel combined support structure of the slow beded rock mass that inclines, and comprises grid steel frame 1, sprayed mortar arch section 2, sprayed mortar abutment wall section 3, arch radially anchor pole 4, advance anchor bolt or advanced tubule 5.Described arch radially anchor pole 4, advance anchor bolt or advanced tubule 5 is disposed within the scope of 120 ° of arch, and is firmly connected with grid steel frame 1, and 1 of grid steel frame is established longitudinal dowel 9.This combined support structure effective Strengthening Tunnel roof rock mass in the slow beded rock mass constructing tunnel that inclines, fully guarantees the stable of country rock and face after excavation, controls wall rock destabilization and excessive sedimentation, assurance construction safety.Compare with the supporting and protection structure that profile steel frame forms, grid steel frame combined support structure has that speed of application is fast, structure is light and handy, manufacture craft is simple, install set up conveniently, stress condition is good, remarkable advantage that can immediate support, slow tunnel, the rock stratum fast and safe construction that inclines can be realized, huge economic and social benefit can be produced.Grid steel frame is compared profile steel frame simultaneously, and steel using amount is few, cost savings, artificial and machinery expenses also greatly reduces, economy aspect is much better than profile steel frame, and in the better situation of abutment wall wall rock condition, attenuate sprayed mortar thickness, cancellation abutment wall grid, can be engineering economy great amount of investment.
The slow rock stratum tunnel excavation damage envelope that inclines mainly occurs in vault, numerical analysis shows, the top board plastic zone degree of depth is about 2～3 times of abutment wall, and vault settling amount is much larger than abutment wall horizontal convergence amount, and therefore the slow rock stratum Tunnel Stability that inclines is controlled the strength and stiffness of answering emphasis to strengthen arch supporting and protection structure.The support action of system anchor bolt mainly contains suspention, compound beam, extruding reinforcement effect, effective Strengthening Tunnel roof rock mass, controlroof surrouding rock deformation and unstability, according to production practices and field measurement data, show, slow, incline in beded rock mass tunnel, within the scope of 120 ° of arch, the suffered axle power of anchor pole is larger, the abutment wall position suffered pulling force of anchor pole is very little, do not bring into play due effect, therefore the utility model proposes bolt support prioritization scheme, only within the scope of 120 ° of arch, configure radially anchor pole, abutment wall does not set anchor pole.Simultaneously, before tunnel excavation, take pre-supporting reinforcing technique extremely important to guaranteeing stablizing of the rear country rock of excavation and supporting, the utility model adopts the pre-supporting technology measure of advance anchor bolt or advanced tubule, with after excavation radially anchor pole, pneumatically placed concrete layer form support system jointly grid steel frame, arch, at tunnel cross section, form an arch non-individual body, make it reinforce excavation face earth layer in front.After tunnel excavation to before supporting and protection structure generation effect during this period of time, empty rock mass is faced in supporting, maintains excavation face stable, reduces settling amount.
Grid steel frame is a kind of Novel steel frame of being used widely after external experience of drawing, and it has, and steel using amount is few, stress condition good, make and to set up the advantages such as simple, supporting is timely, is particularly suitable for easily occurring use in the slow beded rock mass tunnel that inclines of top inbreak.According to abutment wall position country rock situation, grid steel frame can adopt the scope setting of 180 ° of arch or the setting of arch wall scope.The embodiment 1 that sees figures.1.and.2 and illustrate, if rock stratum, tunnel side wall position is more stable, integrality is better, 180 ° along arch scope settings of grid steel frame 1, grid is not established at abutment wall position, and the thickness of sprayed mortar arch section 2 is greater than the thickness of sprayed mortar abutment wall section 3.With reference to by the embodiment 2 shown in Fig. 4 and Fig. 5, as abutment wall rock crack is grown, integrality is poor, grid steel frame 1 is along the setting of arch wall position, and the thickness of sprayed mortar arch section 2, sprayed mortar abutment wall section 3 is equal.
The outer limb of described advance anchor bolt or advanced tubule 5 is 10～15 °, along circuit longitudinal lap joint length, is 0.5～1.0m.The body of advanced tubule plays the effect of advance anchor bolt simultaneously, pass through conduit slip casting simultaneously, can reinforce top certain limit rock mass, again can rest country rock, its support rigidity, pre-supporting effect are better than advance anchor bolt, be applicable to weak broken band, Shallow Section, underground water and grow the pre-supporting in section tunnel, advance anchor bolt is applicable to that surrouding rock stress is less, underground water is less, rock mass is compared with the pre-supporting in reduction stage tunnel.
The above the utility model that just explains through diagrams is applicable to some principles of the tunnel combined support structure of the slow beded rock mass that inclines, be not the utility model to be confined to shown in and in described concrete structure and the scope of application, therefore the corresponding modify being likely utilized every and equivalent, all belong to the scope of the claims that the utility model is applied for.
Claims (5)
1. be applicable to the tunnel combined support structure of the slow beded rock mass that inclines, comprise grid steel frame (1), sprayed mortar arch section (2), sprayed mortar abutment wall section (3), arch radially anchor pole (4), advance anchor bolt or advanced tubule (5), it is characterized in that: described arch radially anchor pole (4), advance anchor bolt or advanced tubule (5) is disposed within the scope of 120 ° of arch, and be firmly connected with grid steel frame (1), between grid steel frame (1), establish longitudinal dowel (9).
2. the tunnel combined support structure that is applicable to the slow beded rock mass that inclines as claimed in claim 1, it is characterized in that: 180 ° along arch scope settings of described grid steel frame (1), the thickness of sprayed mortar arch section (2) is greater than the thickness of sprayed mortar abutment wall section (3).
3. the tunnel combined support structure that is applicable to the slow beded rock mass that inclines as claimed in claim 1, is characterized in that: described grid steel frame (1) arranges along arch wall position, and the thickness of sprayed mortar arch section (2), sprayed mortar abutment wall section (3) equates.
4. the tunnel combined support structure that is applicable to the slow beded rock mass that inclines as claimed in claim 1, it is characterized in that: described grid steel frame (1) adopts three limbs or the main muscle of four limbs, contact muscle adopts splayed to connect, with bolts between each unit grid, lock pin anchor tube (6) and pading plate (10) are established in steelframe footing or junction, unit.
5. the tunnel combined support structure that is applicable to the slow beded rock mass that inclines as claimed in claim 1, is characterized in that: the outer limb of described advance anchor bolt or advanced tubule (5) is 10～15 °, along circuit longitudinal lap joint length, is 0.5～1.0m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320655835.1U CN203547773U (en) | 2013-10-23 | 2013-10-23 | Channel combined support structure suitable for slowly inclined stratified rock mass |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320655835.1U CN203547773U (en) | 2013-10-23 | 2013-10-23 | Channel combined support structure suitable for slowly inclined stratified rock mass |
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| CN203547773U true CN203547773U (en) | 2014-04-16 |
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| CN201320655835.1U Expired - Fee Related CN203547773U (en) | 2013-10-23 | 2013-10-23 | Channel combined support structure suitable for slowly inclined stratified rock mass |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104343461A (en) * | 2014-09-10 | 2015-02-11 | 西南交通大学 | Light supporting method applicable to gently-dipping-stratum massive rock tunnel |
| CN106121693A (en) * | 2016-07-21 | 2016-11-16 | 中电建路桥集团有限公司 | A kind of horizontal interbedding of soft and hard rocks surrounding rock tunnel suspension roof support structure and method |
| CN106703839A (en) * | 2016-12-28 | 2017-05-24 | 中铁第四勘察设计院集团有限公司 | Lattice girder non-welding supporting structure for tunnel primary support construction |
| CN106703835A (en) * | 2016-12-28 | 2017-05-24 | 中铁第四勘察设计院集团有限公司 | Welding-free quick assembly supporting structure with grid steel frames for tunnel primary supporting construction |
| CN106761847A (en) * | 2016-12-28 | 2017-05-31 | 中铁第四勘察设计院集团有限公司 | A kind of profile steel frame for tunnel just branch construction is exempted to weld pin-connected panel supporting construction |
| CN106761846A (en) * | 2016-12-28 | 2017-05-31 | 中铁第四勘察设计院集团有限公司 | A kind of grid steel frame for tunnel just branch construction exempts to weld pin-connected panel supporting construction |
| CN107420121A (en) * | 2017-09-20 | 2017-12-01 | 中铁十四局集团有限公司 | A kind of interim steelframe locks pin construction method |
| CN108756948A (en) * | 2018-06-15 | 2018-11-06 | 中铁工程设计咨询集团有限公司 | A kind of longspan tunnel prestressed anchor net branch shell is from carrying supporting construction |
| CN111119963A (en) * | 2020-03-05 | 2020-05-08 | 中铁（天津）隧道工程勘察设计有限公司 | Large-span cavern two-lining steel bar hanging bracket combined structure and construction method |
| CN111577339A (en) * | 2020-04-21 | 2020-08-25 | 中国建筑股份有限公司 | High-ground-stress soft rock tunnel supporting structure system and construction method thereof |
| CN112727473A (en) * | 2021-02-04 | 2021-04-30 | 中铁二院工程集团有限责任公司 | Pre-anchoring rapid tunneling construction method for high-ground-stress large-deformation tunnel |
| CN112796795A (en) * | 2020-12-28 | 2021-05-14 | 中国科学院武汉岩土力学研究所 | Combined supporting device, combined supporting system and method for anchor rod and section steel |
-
2013
- 2013-10-23 CN CN201320655835.1U patent/CN203547773U/en not_active Expired - Fee Related
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104343461A (en) * | 2014-09-10 | 2015-02-11 | 西南交通大学 | Light supporting method applicable to gently-dipping-stratum massive rock tunnel |
| CN106121693A (en) * | 2016-07-21 | 2016-11-16 | 中电建路桥集团有限公司 | A kind of horizontal interbedding of soft and hard rocks surrounding rock tunnel suspension roof support structure and method |
| CN106703839B (en) * | 2016-12-28 | 2019-02-05 | 中铁第四勘察设计院集团有限公司 | It is a kind of at the beginning of tunnel branch construct grid steel frame exempt from weld supporting construction |
| CN106761847B (en) * | 2016-12-28 | 2019-02-05 | 中铁第四勘察设计院集团有限公司 | It is a kind of at the beginning of tunnel branch construct profile steel frame exempt from weld pin-connected panel supporting construction |
| CN106761847A (en) * | 2016-12-28 | 2017-05-31 | 中铁第四勘察设计院集团有限公司 | A kind of profile steel frame for tunnel just branch construction is exempted to weld pin-connected panel supporting construction |
| CN106761846A (en) * | 2016-12-28 | 2017-05-31 | 中铁第四勘察设计院集团有限公司 | A kind of grid steel frame for tunnel just branch construction exempts to weld pin-connected panel supporting construction |
| CN106703835A (en) * | 2016-12-28 | 2017-05-24 | 中铁第四勘察设计院集团有限公司 | Welding-free quick assembly supporting structure with grid steel frames for tunnel primary supporting construction |
| CN106703835B (en) * | 2016-12-28 | 2019-02-05 | 中铁第四勘察设计院集团有限公司 | It is a kind of at the beginning of tunnel branch construct grid steel frame exempt from weld quick assembling supporting construction |
| CN106703839A (en) * | 2016-12-28 | 2017-05-24 | 中铁第四勘察设计院集团有限公司 | Lattice girder non-welding supporting structure for tunnel primary support construction |
| CN106761846B (en) * | 2016-12-28 | 2019-02-05 | 中铁第四勘察设计院集团有限公司 | It is a kind of at the beginning of tunnel branch construct grid steel frame exempt from weld pin-connected panel supporting construction |
| CN107420121A (en) * | 2017-09-20 | 2017-12-01 | 中铁十四局集团有限公司 | A kind of interim steelframe locks pin construction method |
| CN108756948A (en) * | 2018-06-15 | 2018-11-06 | 中铁工程设计咨询集团有限公司 | A kind of longspan tunnel prestressed anchor net branch shell is from carrying supporting construction |
| CN108756948B (en) * | 2018-06-15 | 2023-06-20 | 中铁工程设计咨询集团有限公司 | Self-bearing supporting structure for large-span tunnel prestress anchor net supporting rock shell |
| CN111119963A (en) * | 2020-03-05 | 2020-05-08 | 中铁（天津）隧道工程勘察设计有限公司 | Large-span cavern two-lining steel bar hanging bracket combined structure and construction method |
| CN111577339A (en) * | 2020-04-21 | 2020-08-25 | 中国建筑股份有限公司 | High-ground-stress soft rock tunnel supporting structure system and construction method thereof |
| CN111577339B (en) * | 2020-04-21 | 2021-09-28 | 中国建筑股份有限公司 | High-ground-stress soft rock tunnel supporting structure system and construction method thereof |
| CN112796795A (en) * | 2020-12-28 | 2021-05-14 | 中国科学院武汉岩土力学研究所 | Combined supporting device, combined supporting system and method for anchor rod and section steel |
| CN112727473A (en) * | 2021-02-04 | 2021-04-30 | 中铁二院工程集团有限责任公司 | Pre-anchoring rapid tunneling construction method for high-ground-stress large-deformation tunnel |
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|---|---|---|---|
| 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: 20140416 |