scholarly journals Influence of Rainfall Conditions on Stability of Slope Reinforced by Polymer Anti-slide Pile

2021 ◽  
Vol 9 ◽  
Author(s):  
Yuke Wang ◽  
Musen Han ◽  
Xiaoying Lin ◽  
Dongbiao Li ◽  
Hongliang Yu ◽  
...  
Keyword(s):  
Slope Stability ◽  
Disaster Relief ◽  
Low Cost ◽  
High Strength ◽  
Construction Technology ◽  
Reinforcement Effect ◽  
Pile Spacing ◽  
Reinforced Concrete Piles ◽  
New Type ◽  
The Stability

Traditional reinforced concrete piles have high strength and low cost in slope engineering, but the slow forming and long maintenance period make it difficult to meet the needs of emergency and disaster relief tasks, such as landslides caused by rainfall. In this paper, the influence of a new type of polymer anti-slide pile on slope stability under rainfall conditions is studied. With the advantages of fast forming, high strength, simple construction technology, and small disturbance to slope, the new type of anti-slide pile can meet the requirements of emergency and disaster relief tasks. The influence of different rainfall duration, rainfall form, location, and spacing of pile laying on the stability of rainfall slope is explored with fluid-solid coupling analysis. The results show that the slope stability gradually deteriorates with the increase of the peak duration of rainfall intensity. Without rainfall conditions, the reinforcement effect is optimal when the position of pile cloth is 1/2–3/4 L away from the foot of the slope (L is the horizontal length of the slope); with rainfall conditions, when the position of pile cloth is 1/4–1/2 L away from the foot of the slope, the reinforcement effect is optimal. Without rainfall conditions, the reduction of pile spacing can improve the reinforcement effect; with rainfall conditions, the reduction of pile spacing will affect the flow and discharge of seepage rainwater and reduce the reinforcement effect.

The Application of New High-Strength Polyester Fiber Flexible Net for the End Coal Mining Through

2013 ◽  
Vol 750-752 ◽  
pp. 2141-2144
Author(s):  
Qi Tao Duan ◽  
Guo Yin Shang ◽  
Zhu He Xu ◽  
Xi Wen Zhang
Keyword(s):  
High Efficiency ◽  
Low Cost ◽  
Cutting Speed ◽  
High Strength ◽  
Mining Area ◽  
Polyester Fiber ◽  
Construction Technology ◽  
Metal Mesh ◽  
Working Face ◽  
Mesh Material

Shendong mining area hanging nets adopted metal mesh material in the traditional through of fully mechanized coal face. Whose defects were the high cost of materials, process cumbersome, great labor intensity and time consuming. Therefore, new high-strength polyester fiber flexible mesh material was introduced. Its main advantages are: light weight, tensile resistance and drag force strong, flame-retardant and anti-static, low cost, simple process, high efficiency, coal cutting speed. The construction technology process in detail were designed which contained flexible network transported, fixed, dropped and raised. The project was implemented in Shigetai Coal at the end of No.12401 mining face. Results show that from working face mounting network to smoothly through with only 40 hours, compared with the traditional metal net can save 44 hours and cost 480000 yuan.

scholarly journals A New Multi-objective Comprehensive Optimization Model for Design of Anti-slide Piles

2021 ◽  
Author(s):  
Chao Xu ◽  
Lei Xue ◽  
Yuan Cui ◽  
Songfeng Guo ◽  
Mengyang Zhai ◽  
...  
Keyword(s):  
Optimization Design ◽  
High Efficiency ◽  
Low Cost ◽  
Optimization Method ◽  
Internal Force ◽  
Human Society ◽  
Reinforcement Effect ◽  
Pile Spacing ◽  
Multi Objective ◽  
Pile Length

Abstract Landslides have posed a huge threat to the ecological environment and human society all over the world. As the most conventional reinforcement method, anti-slide piles are widely used in the reinforcement of slopes. Currently, more and more attentions have been paid to the low-cost and high-efficiency optimal design of anti-slide piles. However, limitations in the method of the optimization design for slope reinforced with piles still exist. In this paper, a new multi-objective comprehensive optimization method was proposed for the optimization of the slope reinforced with anti-slide piles. The factor of safety, internal force and deflection of piles were selected as the optimization indexes and the optimization index weight was determined by integrating the subjective and objective weight. The influence of the pile location, pile length and pile spacing on the reinforcement effect was analyzed by the numerical simulation. Through the simulation case analysis, the proposed model had achieved good effects on the optimization design of anti-slide piles, which could effectively reduce the engineering costs. The optimization results showed that the best reinforcement effect for the homogeneous slope could be obtained when the anti-slide piles with the critical pile length and small pile spacing was located in the middle of the slope. This provides a new solution for the optimization design of other types of complex slopes, and has broad application prospects.

Synthesis of Bi2S3/MoS2 Nanorods and Their Enhanced Electrochemical Performance for Aluminum Ion Batteries

2020 ◽  
Vol 17 (3) ◽  
Author(s):  
Shimeng Zhao ◽  
Jialin Li ◽  
Haixia Chen ◽  
Jianxin Zhang
Keyword(s):  
Cathode Materials ◽  
High Performance ◽  
Low Cost ◽  
Specific Capacity ◽  
Discharge Voltage ◽  
Aluminum Ion ◽  
High Charge Density ◽  
Initial Charge ◽  
New Type ◽  
The Stability

Abstract Rechargeable aluminum ion batteries (AIBs) have attracted much attention because of their high charge density, low cost, and low flammability. Transition metal sulfides are a class of cathode materials that have been extensively studied. In this report, Bi2S3 nanorods and Bi2S3/MoS2 nanorods were synthesized by the hydrothermal method as new type of cathode materials for rechargeable AIBs. The diameter of Bi2S3/MoS2 nanorods is 20–100 nm. The Bi2S3 nanorods display high initial charge and discharge capacities of 343.3 and 251 mA h/g with a current density of 1 A/g. The static cycling for the Bi2S3/MoS2 nanorods electrode at 1 A/g denotes high stability with a specific capacity of 132.9 mA h/g after 100 cycles. The charging voltage platform of Bi2S3 nanorods and Bi2S3/MoS2 nanorods is at 1.1–1.4 V, and the discharge voltage platform is at around 0.8 V. The well-defined heterojunction maintains the stability of the Bi2S3 structure during long-term cycling, which is desirable for aluminum ion batteries. This strategy reveals new insights for designing cathode materials of high-performance AIBs.

Application Research on Geo-Filament Bolt Reinforced Earthen Site

2013 ◽  
Vol 353-356 ◽  
pp. 1001-1004
Author(s):  
Xiao Fei Mao ◽  
Zhao Dong ◽  
Yu Qian Liu
Keyword(s):  
Advanced Technology ◽  
Structure Stability ◽  
Construction Technology ◽  
Working Mechanism ◽  
Soil Medium ◽  
Historical Significance ◽  
Simulating Analysis ◽  
New Type ◽  
The Stability ◽  
New Research

After hundreds years or even a thousand years of vicissitudes, the earthen sites are destroyed seriously. Protecting these cultural relics has great historical significance and practical value. The protections of the earthen sites include two aspects which are chemistry and physics protection at present. Compared with chemic protection, the structure stability is more important. So the stability reinforcement used bolt is researched for many scholar. Combined the reinforced project of Gaochang earthen site in xinjiang province, and directed toward the new type bolt of geo-filament, the article introduced the construction technology of the geo-filament bolt; in addition, the numerical comparative tests in typical soil medium were implemented and compared the bearing capacity of bolt from the different affections, and the working mechanism for bolt pulled-out test was revealed quantitatively by the overall course simulating analysis. According the test results, the surface state affects the anchor force obviously; the length of bolt is feasible from 0.8-2.0m. the geo-filament bolt is proved to be an excellent material which is used in the walls reinforcement of earthen sites, and it has many typical characters which are advanced technology, novelty techniques and construction facility. Because of that, the new research will play an important part in guiding us to protect the earthen sites.

scholarly journals Effect of Curing Temperature on the Mechanical Strength of Alkali Activated Laterite Geopolymeric Samples

2021 ◽  
Author(s):  
Ahmad Fahmi ◽  
◽  
Alireza Babaeian amini ◽  
Yaser Marabi ◽  
Sohrab Rafati Zavaragh ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Mechanical Strength ◽  
Sodium Hydroxide ◽  
Building Materials ◽  
Sodium Hydroxide Solution ◽  
Low Cost ◽  
High Strength ◽  
Curing Temperature ◽  
Green Materials ◽  
New Type

A huge amount of carbon dioxide is released in the Portland cement production process. A large quantity of greenhouse gases is produced because of the significant amount of energy consumption via making bricks through firing. Using the pozzolanic sources containing the aluminosilicate and alkaline reagents, a new type of green materials called geopolymeric materials are produced with quite lower environmental hazards. The use of laterite as an iron-rich aluminosilicate material has a high potential for building materials. In this study, the effect of the curing temperature and characteristics of the alkaline reagent including the concentration of sodium hydroxide solution and the water-glass to sodium hydroxide mass mixing ratio on the mechanical strength of the laterite-based, oven-cured geopolymer samples was investigated. The results showed that the curing temperature had a significant effect on the compressive strength of the laterite-based geopolymer samples so that with a 15°C change at the curing temperature, the compressive strength of the samples could be multiplied and a sharp increase in the mechanical strength could occur. Also, according to the results of this study, the 6 M sodium hydroxide is recommended for the construction of the laterite-based geopolymer materials with low cost and relatively high strength, and for the construction of higher-strength building materials, the 14 M sodium hydroxide is recommended.

Study on Mechanical Properties of New Type Chain Concrete Blocks with Ecological Function

2011 ◽  
Vol 213 ◽  
pp. 409-413
Author(s):  
Xiao Lei Zhang ◽  
Jun Jie Li ◽  
Zun Xin Huang ◽  
Yong Hao Chen
Keyword(s):  
Mechanical Properties ◽  
Stress Condition ◽  
Low Cost ◽  
Concrete Block ◽  
Ecological Function ◽  
Average Thickness ◽  
Ecological Protection ◽  
Concrete Blocks ◽  
New Type ◽  
The Stability

A drainage experiment on chain concrete blocks with ecological function has carried out to study their mechanical properties. This paper presents the stress condition, stability and the effect of infilling gravels, and analyzes the anti-scour capability of the chain concrete block revetment, finally provides some usage suggestions. The results indicate that: The stability and anti-scour capability are good after the blocks are filled with gravels. The infilling gravels are scoured and a certain slope is formed. It is suggested to consider the residual volume of the gravels to save investments. The average thickness of the cushion is suggested to be 15cm to keep the dry stones smooth. The new type chain concrete blocks have such advantages as high anti-shear stress and stability, well permeability, ecological protection, easy construction and low cost.

Study on Production Technology of Paper Wooden Compound Pallets

2013 ◽  
Vol 690-693 ◽  
pp. 1057-1060
Author(s):  
Jian Hai Guo ◽  
Jun Yan Huang ◽  
Xin Sun ◽  
Shuang Ling Wu ◽  
Jie Ma
Keyword(s):  
Flat Plate ◽  
Environmental Protection ◽  
Production Technology ◽  
Raw Materials ◽  
Low Cost ◽  
High Strength ◽  
Packaging Materials ◽  
Light Weight ◽  
Particle Board ◽  
New Type

The paper wooden compound pallets are produced through the processing and assembly by using particle board, paper tubes and PE coated paper board as raw materials. Comparing with traditional wooden flat plate, the new type of green environmental protection pallets has many advantages such as high strength, light weight, low cost, waterproof, anti-moth-eaten, no need fumigation, etc. is an ideal green transport packaging materials for export commodities. The paper discusses and probes into the process and technology of paper wooden compound pallets.

Decomposition of the metastable beta titanium alloy Ti-15-3

1983 ◽  
Vol 41 ◽  
pp. 264-265
Author(s):  
Y. L. Chen ◽  
S. Fujlshiro
Keyword(s):  
Low Cost ◽  
High Strength ◽  
Alpha Phase ◽  
Thick Sheet ◽  
Omega Phase ◽  
Beta Titanium Alloy ◽  
Beta Titanium ◽  
Beta Matrix ◽  
Metastable Beta ◽  
Very High

Metastable beta titanium alloys have been known to have numerous advantages such as cold formability, high strength, good fracture resistance, deep hardenability, and cost effectiveness. Very high strength is obtainable by precipitation of the hexagonal alpha phase in a bcc beta matrix in these alloys. Precipitation hardening in the metastable beta alloys may also result from the formation of transition phases such as omega phase. Ti-15-3 (Ti-15V- 3Cr-3Al-3Sn) has been developed recently by TIMET and USAF for low cost sheet metal applications. The purpose of the present study was to examine the aging characteristics in this alloy.The composition of the as-received material is: 14.7 V, 3.14 Cr, 3.05 Al, 2.26 Sn, and 0.145 Fe. The beta transus temperature as determined by optical metallographic method was about 770°C. Specimen coupons were prepared from a mill-annealed 1.2 mm thick sheet, and solution treated at 827°C for 2 hr in argon, then water quenched. Aging was also done in argon at temperatures ranging from 316 to 616°C for various times.

The stability and collapse of lava domes: insight from UAS-derived 4D structure and slope stability models

2020 ◽  
Author(s):  
Brett Carr ◽  
Einat Lev ◽  
Loÿc Vanderkluysen ◽  
Danielle Moyer ◽  
Gayatri Marliyani ◽  
...  
Keyword(s):  
Slope Stability ◽  
Lava Domes ◽  
The Stability

ANALISIS KESTABILAN LERENG DINDING AKHIR DI PIT BARATLAUT PADA PENAMBANGAN BATUBARA DI PT. PUTERA BARA MITRA , KECAMATAN MENTEWE, KALIMANTAN SELATAN

KURVATEK ◽  
2018 ◽  
Vol 3 (1) ◽  
pp. 21-34
Author(s):  
Untung Wahyudi ◽  
Excelsior T P ◽  
Luthfi Wahyudi
Keyword(s):  
Slope Stability ◽  
Mining Operation ◽  
Subsurface Water ◽  
Mining System ◽  
Mine Site ◽  
Analysis And Design ◽  
The Stability ◽  
End Wall ◽  
Wall Slope ◽  
Mining Slope

PT. Putera Bara Mitra used open mining system for mining operation, Yet the completion of study on the end wall slope stability that  undertaken by geotechnical PT. Putera Bara Mitra in Northwest Pit and the occured a failure in the low wall on the 1st June 2012 led to the need for analysis and design the overall slope at the mine site. To analyze and design the overall slope, used value of the recommended minimum safety. The value was based on company for single slope SF ≥ 1.2 and SF ≥ 1.3 for overall slope. The calculation used Bichop method with the help of software slide v 5.0. Geometry improvements was done at the low slopes that originally single wall with a 30 m bench height and a slope 70° with SF = 0.781, into 4 levels with SF = 1.305. The analysis explained the factors that affect the stability of the low wall included the mining slope geometry, unfavorable drainase system, material stockpiles and seismicity factors. It was necessary to do prevention efforts to maintain the stability of the slope included the redesign to slope geometry, handling surface and subsurface water in a way to control slopes draining groundwater, vegetation stabilization using and monitoring slope using Total Station with Prism and Crackmeter to determine the movement of cracks visible on the surface. 

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