CN102852533A - High-strength three-dimensional support system of yielding type restriction concrete lagging jack - Google Patents
High-strength three-dimensional support system of yielding type restriction concrete lagging jack Download PDFInfo
- Publication number
- CN102852533A CN102852533A CN2012103977955A CN201210397795A CN102852533A CN 102852533 A CN102852533 A CN 102852533A CN 2012103977955 A CN2012103977955 A CN 2012103977955A CN 201210397795 A CN201210397795 A CN 201210397795A CN 102852533 A CN102852533 A CN 102852533A
- Authority
- CN
- China
- Prior art keywords
- concrete
- strength
- anchor
- bow
- dimensional support
- Prior art date
- 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.)
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- 239000004567 concrete Substances 0.000 title claims abstract description 68
- 239000011435 rock Substances 0.000 claims abstract description 31
- 229910000831 Steel Inorganic materials 0.000 claims description 15
- 239000010959 steel Substances 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound 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- 238000005065 mining Methods 0.000 claims description 3
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- 239000007921 spray Substances 0.000 description 1
Abstract
The invention discloses a high-strength three-dimensional support system of a yielding type restriction concrete lagging jack, which is mainly formed by a restriction concrete lagging jack, a yielding node, a vertical beam, an anchor rod or an anchor cable, wherein the restriction concrete lagging jack is in a closed structure which is the same as the shape of a roadway and is formed by connecting and combining restriction concrete through a sleeve and the yielding node; the restriction concrete is distributed at an interval and is connected through the vertical beam; the anchor rod or the anchor cable passes through the vertical beam to be anchored into a rock layer; pre-stress is applied so as to form extrusion effect on a surrounding rock; and the lagging jack forms an integral structure with the anchor rod or the anchor cable through the vertical beam, and a space three-dimensional support system is formed by combined action. The high-strength three-dimensional support system is applicable to an underground engineering support including a deep soft rock underground roadway and the like, and has the advantages of high supporting strength, good stability, reasonable stress and the like; and the high-strength three-dimensional support system has a yielding function and can effectively control the stability of a roadway surrounding rock.
Description
Technical field
The invention belongs to the underground engineering support field, particularly the underground cave in a kind of deep lane support system.
Background technology
Along with socioeconomic development, building of underground rock engineering such as coal mine roadway, road and rail tunnel and large hydropower station is more and more, the situation of the deep tunnel that faces and the large buried depth of chamber group, large section also increases gradually, and corresponding supporting problem is also more and more outstanding with it., supporting difficult characteristics large for the distortion of deep soft rock cavern, the support pattern of the large section of deep high stressed soft rock cavern carried out particular study both at home and abroad, experienced from common bolt-spary supports, sprayed steel fibre supporting, flexible steel bracket support to forms such as the spray of anchor net and flexible steel support combined supportings, but the effect of these support forms is not very desirable, Support Resistance is not enough mostly, and supporting intensity is not high.In general, the large deformation that tunnel and chamber group show under deep high stressed soft rock and fragmented rock body condition, difficult supporting problem, existing support technology is difficult to satisfy fully deep high stress tunnel and chamber group's supporting needs, has had a strong impact on production and the safety of deep rock mass engineering project.
Summary of the invention
The object of the invention is to overcome the deficiency of above-mentioned supporting aspect, provide a kind of supporting intensity high, the die mould that allows that is applicable to the underground engineering supports such as the underground cave of deep soft rock lane (tunnel, tunnel etc.) of good stability and reasonable stress retrains concrete bow member high-strength three-dimensional support system.
For achieving the above object, the present invention adopts following technical proposals: allow die mould retrain concrete bow member high-strength three-dimensional support system, mainly by retraining the concrete bow member, allowing and press node, longitudinal beam, anchor pole or anchor cable to form, constraint concrete bow member is the enclosed construction consistent with roadway shape, and the interval is arranged, connected with longitudinal beam between the adjacent constraint concrete bow member, be provided with anchor pole or anchor cable hole on the longitudinal beam, anchor pole or anchor cable pass longitudinal beam and anchor in the rock stratum, and apply prestressing force, and country rock is formed squeezing action; Anchor pole or anchor cable form a three-dimensional support system by longitudinal beam and the acting in conjunction of constraint concrete bow member.And, be provided with leveling between constraint concrete bow member and the country rock and release ergosphere, so that bow member and country rock close contact and make bow member bear uniform pressure.
Described constraint concrete bow member is retrained concrete by sleeve or allowed by multistage presses the node connection to combine, and is shaped as stalk arch, circle or the shape of a hoof.
Described constraint concrete is to fill the member that the core concrete forms in the steel tube confinement material, and wherein, the core concrete is the steel fibrous concrete material, and constraint concrete cross sectional shape is rectangle, round-shaped according to the practical application needs.
Described allowing presses node to press material and sleeve to consist of by allowing, and wherein, sleeve set is on constraint concrete bow member, and the play movements of two constraint concretes are filled with and allow the pressure material in sleeve, allow press material be have quantitative yielding property can allow pressure ring or macromolecular material.
Described longitudinal beam is mining girder steel channel-section steel, i iron or the constraint concrete with regular shape.
Described anchor pole is high strength anchor bar or grouted anchor bar, and described anchor cable is high-strength anchor cable or grouting cable anchor.
Described leveling is released ergosphere and is formed by the woven bag filling that the comminuted coal spoil is housed.
The present invention has the following advantages:
1. constraint concrete bow member has high-strength supporting capacity, and it is large to protect surface area, and plasticity and toughness properties are better, and non-deformability is strong, and the deep soft rock cave lane of large deformation, high confining pressure is had remarkable supporting effect.
2. the connection by longitudinal beam, make constraint concrete bow member and anchor pole or anchor cable acting in conjunction, form the three-dimensional support system in space, in the high-strength enabling capabilities of performance constraint concrete bow member, can more effective anchor pole or anchor cable prestressing force be diffused in the surrounding rock of chamber by bow member, can provide three-dimensional supporting power for country rock, surrouding rock deformation is controlled in the allowed band, avoid causing because of excessive deformation the bearing capacity forfeiture of country rock itself, thereby guarantee the stability of cave lane country rock.
3. the support system supporting intensity is high, integer support property regulation space is large, constraint concrete and longitudinal beam, anchor pole or anchor cable are used in conjunction with, can adjust bow member spacing, longitudinal beam array pitch in conjunction with on-the-spot geological condition, retrain concrete size and anchor pole or the parameters such as anchor cable model and an array pitch to carry out the coupling of mechanical property, country rock is carried out effective supporting.
4. allow and press node can play the pressure effect that effectively allows, after the support system bearing capacity reaches certain limit, allow country rock to produce certain distortion with release pressure, guaranteed monolithic stability and the safety of support system.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention one;
Fig. 2 retrains longitudinal beam connection diagram between concrete bow member frame among the present invention;
Fig. 3 is A-A sectional view among Fig. 1.
Fig. 4 is A structure enlarged diagram among Fig. 1;
Fig. 5 is the structural representation of the embodiment of the invention two.
Wherein: 1-constraint concrete bow member; 2-allow the pressure node; 3-sleeve; 4-longitudinal beam; Ergosphere is released in 5-leveling; 6-anchor pole; 7-constraint concrete; 8-constraint steel pipe; 9-concrete; 10-allow pressure ring; 11-tunnel terrace; 12-country rock.
The specific embodiment
The present invention will be further described below in conjunction with accompanying drawing and embodiment.
With reference to Fig. 1 ~ 2, the specific embodiment of the present invention is, allow die mould retrain concrete bow member high-strength three-dimensional support system, mainly by constraint concrete bow member 1, allow and press node 2, longitudinal beam 4, anchor pole 6 forms, constraint concrete bow member 1 adds domes of the anti-end for the closed stalk arch consistent with roadway shape, its layout that keeps at a certain distance away, connect with longitudinal beam 4 between the adjacent constraint concrete bow member 1, be provided with bolthole on the longitudinal beam 4, anchor pole 6 passes longitudinal beam 4 and anchors in the country rock 12 again, and apply prestressing force, and country rock 12 is formed squeezing action, anchor pole 6 forms a three-dimensional support system by longitudinal beam 4 and constraint concrete bow member 1.Be provided with leveling between constraint concrete bow member 1 and the country rock 12 and release ergosphere 5, so that bow member 1 and country rock 12 close contacts and make bow member 1 bear uniform pressure.Wherein, the member that constraint concrete 7 forms for constraint steel pipe 8 inner filling steel fiber concretes 9, cross sectional shape is square (Fig. 3); Single constraint concrete bow member 1 is combined by 4 sections constraint concretes 7 connections, and the arch section presses node 2 to be connected with stalk section constraint concrete 7 by allowing, and encircle section and is connected by sleeve 3 with stalk section constraint concrete 7 at the anti-end; Allow and press node 2 by allowing pressure ring 10 and square sleeve 3 consist of, allow pressure ring 10 be arranged on the position, play movement (Fig. 4) of two constraint concretes 7 in the sleeve 3; Longitudinal beam 4 is mining channel-section steel, and length is consistent with adjacent bow member spacing; Anchor pole 6 can be selected high strength anchor bar or grouted anchor bar according to actual conditions and needs; Leveling is released ergosphere 5 and is formed by the woven bag filling that the comminuted coal spoil is housed.
In the present invention, bow member spacing, longitudinal beam arrange between density and anchor pole or anchor cable that the parameter such as array pitch can be according to the actual conditions adjustment, embodiment two as shown in Figure 5, for the Deep Soft Rock Tunnel that presents obvious asymmetrical deformation feature, longitudinal beam 4, anchor pole 6 can be arranged to unsymmetric form, and use grouted anchor bar to carry out wall rock grouting and reinforce, add strong supporting at key position.
As known by the technical knowledge, the present invention can realize by other the embodiment that does not break away from its Spirit Essence or essential feature.Therefore, with regard to each side, all just illustrating, is not only.All within the scope of the present invention or the change within being equal to scope of the present invention all be included in the invention.
Claims (7)
1. allow die mould retrain concrete bow member high-strength three-dimensional support system, it is characterized in that: mainly by retraining the concrete bow member, allowing and press node, longitudinal beam, anchor pole or anchor cable to form, wherein, constraint concrete bow member is the enclosed construction consistent with roadway shape, the interval is arranged, connects with longitudinal beam between the adjacent constraint concrete bow member, is provided with anchor pole or anchor cable hole on the longitudinal beam, anchor pole or anchor cable pass longitudinal beam and anchor in the rock stratum again, and anchor pole or anchor cable become a three-dimensional support system by longitudinal beam with constraint concrete arch; Be provided with leveling between constraint concrete bow member and the country rock and release ergosphere.
2. the die mould that allows according to claim 1 retrains concrete bow member high-strength three-dimensional support system, it is characterized in that: described constraint concrete bow member is retrained concrete by sleeve or allowed by multistage presses the node connection to combine, and is shaped as stalk arch, circle or the shape of a hoof.
3. the die mould that allows according to claim 1 and 2 retrains concrete bow member high-strength three-dimensional support system, it is characterized in that: described constraint concrete is to fill the member that the core concrete forms in the steel pipe, wherein, the core concrete is the steel fibrous concrete material, and constraint concrete cross sectional shape is rectangle, circle.
4. the die mould that allows according to claim 1 and 2 retrains concrete bow member high-strength three-dimensional support system, it is characterized in that: described allowing presses node to press material and sleeve to consist of by allowing, wherein, sleeve set is on constraint concrete bow member, the play movements of two constraint concretes are filled with and allow the pressure material in sleeve, allow press material be have quantitative yielding property can allow pressure ring or macromolecular material.
5. the die mould that allows according to claim 1 retrains concrete bow member high-strength three-dimensional support system, and it is characterized in that: described longitudinal beam is mining girder steel channel-section steel, i iron or the constraint concrete with regular shape.
6. the die mould that allows according to claim 1 retrains concrete bow member high-strength three-dimensional support system, and it is characterized in that: described anchor pole is high strength anchor bar or grouted anchor bar, and described anchor cable is high-strength anchor cable or grouting cable anchor.
7. the die mould that allows according to claim 1 retrains concrete bow member high-strength three-dimensional support system, and it is characterized in that: described leveling is released ergosphere and formed by the woven bag filling that the comminuted coal spoil is housed.
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| CN2012103977955A CN102852533A (en) | 2012-10-18 | 2012-10-18 | High-strength three-dimensional support system of yielding type restriction concrete lagging jack |
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| CN2012103977955A CN102852533A (en) | 2012-10-18 | 2012-10-18 | High-strength three-dimensional support system of yielding type restriction concrete lagging jack |
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| CN104153792A (en) * | 2014-07-24 | 2014-11-19 | 山东大学 | Energy-absorption yield tunnel support system and method suitable for weak broken wall rock |
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| CN104343458A (en) * | 2014-09-29 | 2015-02-11 | 湖南科技大学 | Full-section wide-width one-piece type steel bracket and supporting method thereof |
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| CN105569673A (en) * | 2015-12-31 | 2016-05-11 | 中国石油天然气集团公司 | Concrete filled steel tube bracket system and construction method |
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| CN105952474A (en) * | 2016-07-08 | 2016-09-21 | 山东大学 | Rapid construction method for primary support of confined concrete of large-section tunnel |
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| CN108915735A (en) * | 2018-06-21 | 2018-11-30 | 安徽理工大学 | Slopes wall construction method for supporting and slopes wall support system |
| CN109372556A (en) * | 2018-09-30 | 2019-02-22 | 淮阴工学院 | A kind of sandwich arch and construction method suitable for high stressed soft rock tunnel supporting roadway surrounding rock |
| CN109695454A (en) * | 2019-01-25 | 2019-04-30 | 河北工程大学 | The construction method of preliminary bracing is carried out in the constructing tunnel of high earthquake zone fracture area |
| CN110094215A (en) * | 2019-05-30 | 2019-08-06 | 三峡大学 | Non-newtonian fluid liner supporting structure and construction method |
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