CN107514268A - A kind of high ductility tunnel support structure across active fault - Google Patents

A kind of high ductility tunnel support structure across active fault Download PDF

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Publication number
CN107514268A
CN107514268A CN201710511103.8A CN201710511103A CN107514268A CN 107514268 A CN107514268 A CN 107514268A CN 201710511103 A CN201710511103 A CN 201710511103A CN 107514268 A CN107514268 A CN 107514268A
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China
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pva
ecc
active fault
tunnel
support structure
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CN201710511103.8A
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CN107514268B (en
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丁祖德
李晓琴
杜茜
杜婷
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Kunming University of Science and Technology
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Kunming University of Science and Technology
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/04—Lining with building materials
    • E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
    • E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/04—Portland cements
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/04—Lining with building materials
    • E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
    • E21D11/107—Reinforcing elements therefor; Holders for the reinforcing elements
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00724—Uses not provided for elsewhere in C04B2111/00 in mining operations, e.g. for backfilling; in making tunnels or galleries
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20—Resistance against chemical, physical or biological attack
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/34—Non-shrinking or non-cracking materials
    • C04B2111/343—Crack resistant materials
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways

Abstract

The invention discloses a kind of high ductility tunnel support structure across active fault, including across the active fault supporting section along the longitudinally spaced setting in tunnel and common supporting section, the common supporting section is disposed with armored concrete secondary lining from the inside to the outside, splash guard and pneumatically placed concrete preliminary bracing, across the active fault section is disposed with reinforcing bar enhancing PVA ECC secondary linings from the inside to the outside, splash guard, bubble concrete layer and injection PVA ECC preliminary bracings, spray filled and process concrete layer between PVA ECC preliminary bracings and reinforcing bar enhancing PVA ECC secondary linings, splash guard is set between bubble concrete layer and reinforcing bar enhancing the PVA ECC secondary linings.The component of the PVA ECC materials is cement, flyash, sand, water, water reducer and PVA fibers.The present invention has good shearing resistance cutting capacity and shock resisting effect, can effectively reduce the influence of fracture the sliding changing of the relative positions and geological process to tunnel during operation.

Description

A kind of high ductility tunnel support structure across active fault
Technical field
The present invention relates to a kind of tunnel support structure, specially a kind of high ductility tunnel support structure across active fault.
Background technology
With development of the West Regions and the rapid development of transportation industry, tunnel construction quantity is increasing, and construction scale is more next Bigger, the geological conditions run into is become increasingly complex, and the severe challenge of unfavorable disaster environment is faced during tunnel construction and operation. The situation in the special geological structure locations such as China western mountainous areas Tunnel Passing active breaking belt is more universal.Active fault is also known as For active fault, since being the Quaternary Period（Or since Late Quaternlary）Activity, so far still in activity, and still have within the following regular period The tomography of possible activity.Influence of the active fault to tunnel structure is mainly reflected in two aspects：When the influence of fault activity, Such as the Xiaojiang fault of Yunnan Province, it is broken for Holocene Activities, the average year sliding rate of record is 9.4 ± 1.2mm/, right Great shadow will be produced to the security of tunnel support structure up to century-old tunnel structure, the sliding changing of the relative positions of tomography in Years Of Service Ring.Second, seismogenic fault causes the influence of geological process, the tunnel for passing through tomography or fault belt can be by tight in earthquake Destroy again, larger transverse direction and vertical dislocation can occur in the plane vertical with tunnel axle for the lining cutting at tomography.It is existing Research shows, tunnel structure fault belt transition position have larger shear stress, exist at fault belt it is obvious Stress concentration, easily tunnel structure is caused to destroy.
At present, work has been had carried out some research for across active fault tunnel, domestic and foreign scholars, has summarized tunnel and kept away From 3 kinds of measures of tomography failure by shear：Avoidance, reinforcement and Design of breaking resistance；Develop the foam concrete with shock-absorbing function And Cross-fault leveling tunnel shock resisting technology.Such as Patent No. ZL200910058875.6, denomination of invention：Across active fault tunnel is anti-to be subtracted Shake the patent of invention of construction；Patent No. ZL201320646366.7, denomination of invention：Across the tunnel support structure of active fault Patent of invention.Foregoing invention patent, as buffer layer, absorbs tectonic comparison simultaneously using foam concrete by buffer layer Certain displacement space is provided, has carried out having earthquake situations condition and the Shear design without tunnel structure in the case of shake respectively.It is but above-mentioned Patent of invention there is problems：
First, only rely on foam concrete and carry out damping, do not consider to change the performances such as tunnel rigidity in itself, intensity, damping to subtract Shake, makes it easy to follow the deformation on stratum, so as to reduce the reaction in tunnel.Patent No. ZL201320646366.7 invention is special Profit, it uses multilayer liner structure, increases the rigidity of structure, but can increase material usage, also increases the quality in tunnel, so as to Tunnel is caused to bear bigger earthquake load, this method was both uneconomical, and the possibility to be wrecked in earthquake is also big.And And the bubble concrete layer of its design is arranged only at arch, does not give setting at inverted arch, is unfavorable for the hair of polycrystalline substance cushioning effect Wave.
Second, the tunnel support structure of foregoing invention Patent design, its preliminary bracing and secondary lining are using traditional Concrete structure, its tension, shearing resistance, anti-bending strength are poor.Early stage is runed in tunnel, can still be disappeared by foam concrete buffer layer Except the effect of active fault Shear and gliding dislocations, with the growth of Years Of Service, it is also necessary to by preliminary bracing and secondary Lining cutting is put up a resistance, if high ductility construction can be used to preliminary bracing and secondary lining, to be deformed caused by suitable structures dislocation And stress, and structure is remained to earthquake energy after inelastic state is reached and do not destroy, this can effectively be propped up very much Protection structure and shock resisting technology.
Therefore, for deficiency existing for existing across active fault shock resisting technology, need badly and a kind of Gao Yan across active fault is provided Property tunnel support structure.
The content of the invention
It is an object of the invention to provide one kind by PVA-ECC（Vinal toughness reinforcing cement-base composite material, Polyvinyl alcohol Fiber-Engineered CementitiousComposites, abbreviation PVA-ECC）Form The high ductility tunnel support structure that deformability is strong, cracking resistance, anti-seismic performance are good, it is provided simultaneously with resistance active fault gliding dislocations and breaks Bad and shock resisting ability.
The concrete technical scheme of the present invention is as follows：Include across the high ductility tunnel support structure of active fault along tunnel longitudinal direction Spaced across active fault supporting section 8 and common supporting section 9, the common supporting section 9 are disposed with steel from the inside to the outside Reinforced concrete secondary lining 7, splash guard 2 and pneumatically placed concrete preliminary bracing 6, across the active fault section 8 are set successively from the inside to the outside It is equipped with reinforcing bar enhancing PVA-ECC secondary linings 1, splash guard 2, bubble concrete layer 3 and injection PVA-ECC preliminary bracings 4, injection Filled and process concrete layer 3 between PVA-ECC preliminary bracings 4 and reinforcing bar enhancing PVA-ECC secondary linings 1, the foam coagulation Splash guard 2 is set between soil layer 3 and reinforcing bar enhancing PVA-ECC secondary linings 1.
Preferably, absorbing joint 5, the spray coagulation are provided between across the active fault supporting section 8 and common supporting section 9 Bar-mat reinforcement is hung in native preliminary bracing 6 and injection PVA-ECC preliminary bracings 4 or steel arch-shelf is set.
Preferably, the component of the PVA-ECC is cement, flyash, sand, water, water reducer and PVA fibers, wherein, by matter Measure percentages, cement：Flyash：Sand：Water：Water reducer=1：1.0~1.2：0.6~0.8：0.42~0.57：0.001~0.003； Using the cumulative volume of cement, flyash, sand and water reducer after well mixed as radix, the volume of PVA fibers is 13 ~ 20kg/m3。
Preferably, the cement is P.O.42.5 portland cements, and the flyash is one-level flyash, the grain of the sand Footpath is in 0.2mm ~ 0.4mm, and the length of the PVA fibers is 12mm, and diameter is more than 30 μm, and tensile strength is more than 1200MPa, elastic Modulus is more than 30GPa, and elongation at break is more than 6%.
Preferably, the water reducer is the high-efficiency water-reducing agent of poly-carboxylic acid of water-reducing rate more than 40%.
Its A Hong reinforcing bar enhancing PVA-ECC secondary linings 1 are furnished with longitudinal reinforcement and circumferential reinforcement, using high tenacity, height The PVA-ECC of intensity and the good adhesive property of reinforcing bar, strengthen secondary lining rigidity and deformability, are obviously improved secondary lining Ductility and anti-seismic performance.
The beneficial effects of the invention are as follows：
（1）The compression strength of the high tenacity PVA-ECC materials of the present invention can reach more than 35MPa, and limit tensile strain is more than 3%, It is more than 300 times of normal concrete, is stretching that there is strain hardening, the characteristic of multiple crack growth under bending and shear load, with The adhesive property of reinforcing bar is good, has the characteristics that high tenacity, high-durability, highly energy-consuming, antidetonation and non-deformability are good.
（2）Preliminary bracing and secondary lining of the present invention using high tenacity PVA-ECC materials, have been obviously improved preliminary bracing With the overall performance of the composite lining of secondary lining composition, the ductility and deformability of supporting construction are greatly improved, is strengthened Bear stress and displacement caused by fault slip dislocation.Effectively damping it can be consumed energy plus the bubble concrete layer of central filler, So that tunnel support structure is provided simultaneously with superior resistance active fault gliding dislocations and destroyed and shock resisting ability.
（3）After the present invention is using the preliminary bracing of high tenacity PVA-ECC materials and secondary lining, lining can be reduced as needed Thickness and bubble concrete layer thickness are built, is advantageous to save tunnel excavation space and supporting construction material quantity so that supporting knot The setting of structure is easier flexibly.
Brief description of the drawings
Fig. 1 is the schematic longitudinal section across the high ductility tunnel support structure of active fault of the present invention；
Fig. 2 is the schematic cross-sectional view across the high ductility tunnel support structure of active fault of the present invention；
Each label represents in figure：
1-reinforcing bar strengthens PVA-ECC secondary linings；2-splash guard；3-bubble concrete layer；4-PVA-ECC preliminary bracings； 5-absorbing joint；The preliminary bracing of 6-pneumatically placed concrete；7-armored concrete secondary lining；8-across active fault supporting section；9-general Logical supporting section.
Embodiment
The embodiment of the present invention is described further below in conjunction with drawings and examples.
Embodiment 1：As shown in Figure 1 and 2：Include across the high ductility tunnel support structure of active fault longitudinally spaced along tunnel Across the active fault supporting section 8 and common supporting section 9 set, the common supporting section 9 are disposed with reinforcing bar and mixed from the inside to the outside Solidifying native secondary lining 7, splash guard 2 and pneumatically placed concrete preliminary bracing 6, across the active fault section 8 are disposed with from the inside to the outside Reinforcing bar enhancing PVA-ECC secondary linings 1, splash guard 2, bubble concrete layer 3 and injection PVA-ECC preliminary bracings 4, spray PVA- Filled and process concrete layer 3 between ECC preliminary bracings 4 and reinforcing bar enhancing PVA-ECC secondary linings 1, the bubble concrete layer 3 Splash guard 2 is set between reinforcing bar enhancing PVA-ECC secondary linings 1.
Absorbing joint 5, the pneumatically placed concrete initial stage are provided between across the active fault supporting section 8 and common supporting section 9 Bar-mat reinforcement can be hung as needed in supporting 6 and injection PVA-ECC preliminary bracings 4 or steel arch-shelf etc. is set.
Embodiment 2：Wherein common supporting section 9 is composite lining structure, its construction technology and conventional composite lining Structure is identical；The component of PVA-ECC materials in across active fault supporting section 8 be cement, flyash, sand, water, water reducer and PVA fibers, wherein, by mass percentage, cement：Flyash：Sand：Water：Water reducer=1：1.0~1.2：0.6~0.8：0.42~ 0.57：0.001~0.003；Using the cumulative volume of cement, flyash, sand and water reducer after well mixed as radix, PVA fibers are mixed Measure as 13 ~ 20kg/m3。
The cement is P.O.42.5 portland cements, and the flyash is one-level flyash, and the particle diameter of the sand exists 0.2mm ~ 0.4mm, the length of the PVA fibers is 12mm, and diameter is more than 30 μm, and tensile strength is more than 1200MPa, modulus of elasticity More than 30GPa, elongation at break is more than 6%, and the PVA-ECC is also added with the efficient diminishing of polycarboxylic acids of water-reducing rate more than 40% Agent.
Embodiment 3：Reinforcing bar enhancing PVA-ECC secondary linings 1 are poured using PVA-ECC materials in the present embodiment forms, PVA-ECC preliminary bracings are formed using the injection of PVA-ECC materials, the components of the PVA-ECC materials is cement, flyash, sand, Water, water reducer and PVA fibers, wherein, by mass percentage, cement：Flyash：Sand：Water：Water reducer=1:1.2:0.72: 0.57:0.003, using the cumulative volume of cement, flyash, sand, water reducer after well mixed as radix, the quality volume of PVA fibers For 20kg/m3.The cement is P.O.42.5 portland cements, and the flyash is one-level flyash, and the particle diameter of the sand exists 0.2mm ~ 0.4mm, PVA fiber are the fiber of Japan's production, length 12mm, a diameter of 39 μm, tensile strength 1620MPa, Modulus of elasticity is 42.8GPa, adds Sika high-efficiency water-reducing agent of poly-carboxylic acid.Performance test to above-mentioned PVA-ECC materials is as follows：
（1）Using 100mm × 100mm × 300mm prism test block, 28d is conserved by standard curing method, carries out shaft center compression resistant Strength test.Result of the test shows：PVA-ECC material compression strength average value is 40MPa, and test block exists bright in destructive process Aobvious resistance to compression toughness.
（2）Using 100mm × 100mm × 400mm beam specimen, carry out at 4 points after conserving 28d by standard curing method Bend test.Result of the test shows：PVA-ECC material limits elongation strains reach 3.2%, should for normal concrete ultimate elongation More than 300 times become, strain hardening, the characteristic of multiple crack growth of steel are appeared similar under bending load.
Above result of the test shows that the limit tensile strain of PVA-ECC materials is far above common plain concrete ultimate elongation Strain, test specimen be pressurized, by curved destruction when be ductile fracture, show high tenacity feature.
The stirring means of wherein PVA-ECC materials are：Cement, flyash, sand are added mixer by above-mentioned mass ratio and stirred After mixing uniformly, add PVA fibers by above-mentioned mass ratio and stir, add water, water reducer wet-mixing by above-mentioned mass ratio afterwards Uniformly it can obtain high tenacity PVA-ECC materials.
Reinforcing bar enhancing PVA-ECC secondary linings 1 use the casting methods of PVA-ECC materials for：By above-mentioned PVA-ECC Mixture is poured using lining template trolley for baffle using conventional pumping technology, Schaltisch is removed after pouring completion maintenance 3 days Car, you can obtain PVA-ECC secondary linings.
The injection PVA-ECC preliminary bracings 4 use the injection methods of PVA-ECC materials for：By above-mentioned PVA-ECC mixs Thing is placed in spraying machine and sprayed, and using wet spraying process, layering injection, every layer of jet thickness is 3 ~ 5cm.
The reinforcing bar enhancing PVA-ECC secondary linings 1, bubble concrete layer 3, the thickness of injection PVA-ECC preliminary bracings 4 Determined according to the fault activity of tunnel Years Of Service and sliding rate, Structural strength calls synthesis, this implementation as depicted In example, thickness 30cm ~ 50cm of reinforcing bar enhancing PVA-ECC secondary linings 1, the thickness of bubble concrete layer 3 is 20cm ~ 30cm, The thickness for spraying PVA-ECC preliminary bracings 4 is 15cm ~ 30cm.
The calculating parameter of the bubble concrete layer 3 can be according to existing standard such as《Foam concrete》（JG/T266- 2011）、《Foam concrete application technology code》（JGJ/T341-2014）Set etc. standard, in the present embodiment is：Resistance to compression Intensity is 3.0 ~ 5.0MPa, and modulus of elasticity is 0.6 ~ 1.2GPa, and porosity is more than 50%.
Using flexible connection between across the active fault section 8 and common supporting section 9, specifically, as shown in figure 1, described Absorbing joint 5 is provided between the both ends of across active fault section 9 and common supporting section 9.
The splash guard 2 is closed in tunnel ring loopful, is rolled up using high molecular polymer coiled material, such as polyvinyl chloride waterproof Material, EVA waterproof rolls, HDPE high density ethylene waterproof rolls etc..In embodiment as depicted, the more soft EVA of use Waterproof roll.
The embodiment of the present invention is explained in detail above in conjunction with figure, but the present invention is not limited to above-mentioned reality Mode is applied, in those of ordinary skill in the art's possessed knowledge, the premise of present inventive concept can also not departed from It is lower that various changes can be made.

Claims (6)

  1. A kind of 1. high ductility tunnel support structure across active fault, it is characterised in that：Including along the longitudinally spaced setting in tunnel Across active fault supporting section（8）With common supporting section（9）, the common supporting section（9）Reinforcing bar is disposed with from the inside to the outside to mix Coagulate native secondary lining（7）, splash guard（2）With pneumatically placed concrete preliminary bracing（6）, across the active fault section（8）From the inside to the outside according to It is secondary to be provided with reinforcing bar enhancing PVA-ECC secondary linings（1）, splash guard（2）, bubble concrete layer（3）With injection PVA-ECC initial stages Supporting（4）, spray PVA-ECC preliminary bracings（4）Strengthen PVA-ECC secondary linings with reinforcing bar（1）Between filled and process concrete Layer（3）, the bubble concrete layer（3）Strengthen PVA-ECC secondary linings with reinforcing bar（1）Between splash guard is set（2）.
  2. 2. the high ductility tunnel support structure according to claim 1 across active fault, it is characterised in that：It is described across activity It is broken supporting section（8）With common supporting section（9）Between be provided with absorbing joint（5）.
  3. 3. the high ductility tunnel support structure according to claim 1 across active fault, it is characterised in that：The spray coagulation Native preliminary bracing（6）With injection PVA-ECC preliminary bracings（4）Inside hang bar-mat reinforcement or steel arch-shelf is set.
  4. 4. as claimed in claim 1 across the high ductility tunnel support structure of active fault, it is characterised in that：The PVA-ECC Component be cement, flyash, sand, water, water reducer and PVA fibers, wherein, by mass percentage, cement：Flyash：Sand： Water：Water reducer=1：（1.0~1.2）：（0.6~0.8）：（0.42~0.57）：（0.001~0.003）；With cement, flyash, sand and Cumulative volume after water reducer is well mixed is radix, and the volume of PVA fibers is 13 ~ 20kg/m3。
  5. 5. as claimed in claim 4 across the high ductility tunnel support structure of active fault, it is characterised in that：
    The cement is P.O.42.5 portland cements；The flyash is one-level flyash；The particle diameter of the sand 0.2mm ~ 0.4mm；The length of the PVA fibers is 12mm, and diameter is more than 30 μm, and tensile strength is more than 1200MPa, and modulus of elasticity is more than 30GPa, elongation at break are more than 6%.
  6. 6. as claimed in claim 4 across the high ductility tunnel support structure of active fault, it is characterised in that：The water reducer is The high-efficiency water-reducing agent of poly-carboxylic acid of water-reducing rate more than 40%.
CN201710511103.8A 2017-06-29 2017-06-29 Stride high ductility tunnel supporting construction of activity fracture Active CN107514268B (en)

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CN109989768A (en) * 2019-04-26 2019-07-09 山东大学 A kind of liner structure and its construction method suitable for Tunnel Passing active fault
CN110359954A (en) * 2019-08-02 2019-10-22 西南交通大学 One kind passing through creep faults tunnel particle-filled layers error resilience structure and its construction method
CN110374628A (en) * 2019-08-02 2019-10-25 西南交通大学 One kind passing through the double-deck anti-fault structure in creep faults tunnel and construction method
CN114057456A (en) * 2021-12-23 2022-02-18 昆明理工大学 Multi-scale reinforced light high-ductility cement-based composite material and preparation method thereof

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CN103664069A (en) * 2013-08-30 2014-03-26 江南大学 Injection-type fiber-reinforced cement-based composite material with high ductility
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JP2007009556A (en) * 2005-06-30 2007-01-18 Ps Mitsubishi Construction Co Ltd Segment for shield tunnel and its manufacturing method
CN101550831A (en) * 2009-04-09 2009-10-07 西南交通大学 Shock resisting and reducing structure spanning movable fault tunnel
CN103664069A (en) * 2013-08-30 2014-03-26 江南大学 Injection-type fiber-reinforced cement-based composite material with high ductility
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CN109989768A (en) * 2019-04-26 2019-07-09 山东大学 A kind of liner structure and its construction method suitable for Tunnel Passing active fault
CN110359954A (en) * 2019-08-02 2019-10-22 西南交通大学 One kind passing through creep faults tunnel particle-filled layers error resilience structure and its construction method
CN110374628A (en) * 2019-08-02 2019-10-25 西南交通大学 One kind passing through the double-deck anti-fault structure in creep faults tunnel and construction method
CN114057456A (en) * 2021-12-23 2022-02-18 昆明理工大学 Multi-scale reinforced light high-ductility cement-based composite material and preparation method thereof
CN114057456B (en) * 2021-12-23 2023-03-10 昆明理工大学 Multi-scale reinforced light high-ductility cement-based composite material and preparation method thereof

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