A5065726985- Geotechnical Engineering and Underground Structures
- Geotechnical Engineering and Analysis
- Grouting, Rheology, and Soil Mechanics
- Civil and Geotechnical Engineering Research
- Tunneling and Rock Mechanics
- Rock Mechanics and Modeling
- Underground infrastructure and sustainability
- Climate change and permafrost
- Geotechnical Engineering and Soil Stabilization
- Smart Materials for Construction
- Cryospheric studies and observations
- Perovskite Materials and Applications
- Coal Properties and Utilization
- Geophysical Methods and Applications
- Geoscience and Mining Technology
- Landslides and related hazards
- Geomechanics and Mining Engineering
- Quantum Dots Synthesis And Properties
- Seismic Performance and Analysis
- Power Systems Fault Detection
- Digital Platforms and Economics
- Conducting polymers and applications
- Organic Light-Emitting Diodes Research
- Winter Sports Injuries and Performance
- Technology and Security Systems
North China University of Technology
2014-2024
Peking University
2024
Sichuan University
2022-2023
China Railway Group (China)
2022
Southwest Jiaotong University
2010-2011
Abstract Surface post‐treatment using ammonium halides effectively reduces large open‐circuit voltage ( V OC ) losses in bromine‐rich wide‐bandgap (WBG) perovskite solar cells (PSCs). However, the underlying mechanism still remains unclear and device efficiency lags largely behind. Here, a facile strategy of precisely tailoring phase purity 2D perovskites on top 3D WBG realizing high is reported. The transient absorption spectra, cross‐sectional confocal photoluminescence mapping, Kelvin...
This paper has designed a novel off-wall insulation liner, aiming to prevent severe frost damages for the high-speed railway tunnel in cold regions. In terms of composition, double-layer steel corrugated plates liner not only block falling and water intrusion cold-region tunnels but prolong durability effectiveness thermal materials. Besides, quick-construction technology was derived present study, it exhibits excellent construction efficiency, great economic social benefits tunnel....
Tunnels in the junction of soft and hard rock always suffer severe damages during strong earthquakes. This article aims to investigate seismic effect combination buffer layer steel fibre reinforced concrete (SFRC) linings tunnel design. Firstly, taking Fanjiazhai Tunnel as research background, finite difference calculation models considering modified motion, mechanical damping, safety factor materials are established study response crossing junction. Then, SFRC lining applied into soft-hard...
In railway tunnels located in cold regions, frost damage is constantly emerging, which seriously affects the safety of tunnel operations. While having general thermal insulation effects, measures developed previous studies have not solved problem operational tunnels. To fill this gap, paper puts forward a new composite lining. Firstly, through numerical simulation, lining was verified to better mechanical properties and effects than steel plate The fast construction method proposed excellent...
Field studies by squeezing rock deformation have shown that large slips can occurs in tunnels rock, the may be partially or completely broken. This article proposed two schemes for controlling of which are "resistance combine release" Scheme 1 and "strong support" 2, characteristics mechanism is researched Zhongyi Tunnel. The results show 2 superior to terms rate, cumulative deformation, monthly construction footage. Research provide a reference similar projects.
A thiazolidine-based interfacial modification strategy is developed for wide-bandgap perovskite solar cells to promote the efficiency 20.02% with a reduced V OC deficit of 0.51 V, along good near-infrared transmittance.
More than 80 TBM jamming accidents had been recorded in the Water Diversion Project from Hongyan River to Shitou Shan'xi Province, China, resulting substantial losses. This paper aims investigate rescue technology for of double-shield project through a five-year geotechnical in-situ investigation. Firstly, engineering background, geological and hydrological conditions, construction method, possible hazards, support system is introduced detail. Then, are classified into five kinds total,...
The fault-crossing tunnel in meizoseismal area is directly subjected to strong ground motion, which leads the failure of lining. In order improve seismic safety tunnel, fiber-reinforced concrete applied lining this article. Taking section Zhongyi crossing Wanlong fault as an example, performance was studied by finite difference numerical calculation software FLAC3D. displacement, stress response, and side wall convergence secondary structures are plain concrete, steel steel-basalt hybrid...
Abstract In order to further explore the large deformation control technology of high ground stress soft rock tunnel, this study takes highly weathered carbonaceous shale section Muzhailing tunnel as research background, effect scheme 1 “three-step method” and 2 “pilot expansion are compared analysed by field test numerical simulation. The results show that simulation consistent with test, trend is same. maximum occurs at middle step. From perspective deformation, reduced about 10% 1, both...
Frost damages of the tunnel in cold and seasonally frozen areas seriously affect its operation safety service life. To better prevent frost areas, a new corrugated steel plate (NCSP) liner is proposed to improve insulation capacity linings. Firstly, design parameters construction technologies NCSP are introduced. Then, taking Yushuchuan Jinlin Province China as background, numerical models were built explore temperature fields with liner, theoretical effect was obtained. Afterwards, field...
In order to improve the structural safety and stability of tunnels crossing stick-slip fault, an indoor model test on effect tunnel antibreaking measures under influence fault movements was conducted. Using contact pressure, longitudinal strain, factor, compared analyzed 5 kinds operating conditions, mainly including no measures, strengthening, strengthening reducing dislocation layer, joint, joint. The results showed that strain pressure changed markedly (from severe change more uniform...
Based on the background of Line F 2-3 interval tunnel section Jiujiawan in Urumqi Subway 1, this paper carries out model test research antibreaking technology reducing dislocation layer stick‐slip fracture. The effect different locations and number layers engineering is analyzed paper. results show that when double layer, respectively, set between surrounding rock primary support, support secondary lining, best. It recommended to use scheme for design. can provide reference design traffic...
In order to study the antibreaking effect of fiber reinforced concrete lining in tunnel, this paper takes a subway tunnel engineering project F2-3 section Jiujiawan fault as research background and carries out model test active zone high earthquake intensity. The results show that principle stress longitudinal strain are 30%∼40% 80%∼90%, respectively, minimum value structural safety factor is increased by 4∼5 times. hybrid better than steel lining. polypropylene highest, its 1.62. aspect...
In order to solve the problem of freezing damage treatment and anti-freezing design for railway tunnels in operation seasonal frozen area, this paper proposes a polyurethane-corrugated steel plate insulation lining, studies its thermal effect, relying on project an existing passenger-dedicated tunnel on-site application. paper, lining is applied actual effect verified by field monitoring. The temperature test section was set section. proposed mainly composed corrugated plate, polyurethane...
Shallow utility tunnels with exceptionally large cross-sections in weak soil can face significantly more severe seismic risks compared to conventional deep hazard areas. This study investigates the response and isolation technologies applied a section tunnel 4 compartments one layer, employing simulations. The engineering context, dynamic motions, measuring points of numerical simulation were introduced. Subsequently, finite element method was employed explore behaviors when subjected strong...
Abstract Low‐dimensional perovskites have opened up a new frontier in light‐emitting diodes (LED) due to their excellent properties. However, concerns regarding the potential toxicity of Pb limited commercial development. Sn‐based are regarded as promising candidate replace Pb‐based counterparts, while they generally exhibit strong electron–phonon coupling and consequently blue emission quenching at room temperature (RT), thus perovskite LED devices not yet been reported. Herein,...
At present, the tunnel design specifications in China do not provide a clear and systematic intelligent evaluation system of frost damage cold regions. Based on research results 122 seasonal frozen soil tunnels high-latitude areas China, four key influencing factors geohydrology, temperature, surrounding rock, engineering measures were determined, fuzzy comprehensive model was established, weights all considered, technology had been put forward. Meanwhile, rationality verified by specific...
Tunnel portal sections located in the soft-hard rock junction are vulnerable to strong earthquake motions seismically active regions. The main objective of this paper is investigate seismic response tunnel portals junction. Taking Baiyunding northeast China as a background, shaking table test with geometric scaling ratio 1:30 was built. Details setup and procedures introduced first then results presented. discussion based on peak ground acceleration (PGA), longitudinal, contact stress,...
The objective of this paper is to optimize the selection seismic ground motion intensity indexes in fortification urban shallow-buried rectangular tunnels. This takes a tunnel city as research object, uses ABAQUS establish finite-infinite element coupling model, and selects 70 typical motions for dynamic calculation. Using time history analysis method study response lining structure terms internal force, minimum safety factor strain energy, analyze their correlation with 15 parameters....
Formulae display:?Mathematical formulae have been encoded as MathML and are displayed in this HTML version using MathJax order to improve their display. Uncheck the box turn off. This feature requires Javascript. Click on a formula zoom.
Adding fiber can improve the brittleness of plain concrete. Compared with concrete, basalt fiber‐reinforced concrete has advantages strengthening, toughening, and crack resistance. steel better construction performance. Basalt is a type inorganic material environmental protection high mechanical properties, which an important advantage for controlling deformation soft surrounding rock tunnel. Through indoor model test behavior reinforced lining, bearing characteristics lining was studied....