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Karst collapse, up from its influence factors are divided into natural collapse and man-made collapse.
Natural collapse in karst region is a slow process of natural development, but human engineering construction exacerbated its development, rapidly produced large amounts of collapse in the surface, seriously affect the safety of industrial and agricultural production, railways, highways and so on.
The result is the road collapse type is damaged; (2) collapse of overlaying soil: under depressions, such as karst funnel closed there is generally a negative opening karst terrain morphology, such as sinkholes, large sheets of wide cracks(“melting seam”), which overburden dynamic mechanical effects in the water, the occurrence of ground subsidence caused by damage to the roadbed collapse; (3) destruction of insufficient carrying capacity: mainly derived from the original causes that the soil is the red clay, and bring other mix, the early accumulation is steep terrain type of fall-in-stye accumulation, and it is usually intermittent multi-phase accumulation, vegetation growth in intermittent depression was buried by late accumulation, thus containing humus and closed negative terrain is easy to aggregation of precipitation, resulting in accumulation layer being long-term wet, nature usually being weak and uneven, and the intensity decreasing trend with a top-down, when its carrying capacity
The mechanical properties of rock and soil varies considerably and then become uneven ground, leading to uneven roadbed settlement.
In response to these engineering problems, taking various factors arising from the treatment program into account: Design of slab Culverts and drainage spring in the foot hole, Combination of culverts masonry appropriate support to foot hole of masonry; High - fill roadbed and culvert and the high fill depressions in the soil does not meet load requirements, so foundation treatment should be carried out in theory.

Experimental Research of Distributed Optical Fiber Sensor Monitors the Embankment Hidden Hazard Hua Lei1,a , Ping Yu Zhu2,b , Hong Qiang Liang1,c , Guo Qin Hou1,d 1Hunan Provincial Key Laboratory of Health Maintenance for Mechanical Equipment, Hunan University of Science and Technology, Xiangtan 411201,Hunan Province; China 2School of Mechanical and Electric Engineering, Guangzhou University, Guangzhou 510006, Guangdong Province; China alleihhua@126.com, bzhu.pingyu@gmail.com, cleung2013@126.com, dhgqhappy@126.com Keywords: Distributed Optical Fiber Sensor, Dams, Hidden Hazard, Bending Radius, Experimental Study Abstract.
Introduction When dam is during operation, it maybe show seepage, breaks and cracks, holes and other hidden hazards because of the damage of act of man, nature, organism and other factors.
Especially in dams monitoring of loose medium, sensor cable must be deal with by special process and with protective layer, the strain and temperature and bend radius of the optical fiber all will affect sensing properties of the optical fiber, so it is necessary to calibration by experimental test before the application.
This paper launches free strain and tensile test to understand strain sensing properties of the optical fiber.
This paper launches constant temperature and variable temperature test to understand strain sensing properties of the optical fiber.

The influence of the volume fraction and grain size of TiC nanocrystallites on the coating properties has been examined.
Table 1 summarizes the deposition parameters, chemical composition and mechanical properties of TiC/a-C:H nanocomposite coatings.
Checking against the mechanical properties (Table 1), it is clear that the wear rate (WR) of the nanocomposite coatings significantly decreases with increasing the elasticity index (H/E ratio) and fracture toughness, but not with hardness.
Although for a long time hardness has been regarded as a primary material property affecting wear resistance, the H/E ratio that we termed the elasticity index is a more suitable parameter for predicting wear resistance, as originally proposed by Leyland and Matthews [10, 11].
De Hosson: Influence of deposition parameters on the structure and mechanical properties of nanocomposite coatings, Surf.

Among these nanostructures, nanofibers gained incredible attention due to some interesting properties such as large surface to volume ratio and flexibility [2].
The flexibility, light weight, easy processability, robustness, mechanical, less hazardous impact and chemical resistance are some of the attractive properties of polymers that makes them a suitable choice for piezoelectricity based applications [3], [4].
The material properties associated with these solution include molar masses, viscosity, and conductivity[11], [12].
The factors that affects the transmittance will vary from material to material especially for polymers, metals and ceramics based on the associated bonds along with the shape of the microstructure.
Farooq, “Electrospun Polymer Nanofibers: Processing, Properties, and Applications,” Polymers, vol. 15, no. 1.

Obtaining membranes incorporating clay is attracting interest because it improves the membrane filtration properties.
The addition of solid loads in polymeric materials is a practice widely used in industry to improve its properties - mechanical strength, flammability, thermal and electrical conductivities, eliminating the formation of macrovoids, improvement of porosity, permeability and hydrophilicity [2, 3], with the use of low loading levels (1-5 wt%).
These membranes have properties that provide good chemical resistance as well as heat resistance.
Accordingly, much effort is to improve the performance of membranes with respect to the antifouling properties, mechanical strength and chemical resistance [6].
It is widely used in the commercial preparation of membranes and allows to obtain membranes with different morphology and transportation properties.

Main effects and interaction effects of these factors were analyzed using statistical techniques.
A factorial design of experiments was applied to find out the influence of biomass properties, such as net calorific value and C/N ratio, on the total biogas produced after 65 days of anaerobic digestion (Q).
The effect of selected factors was studied by means of a 22 full factorial design (two factors each at two levels).
The effect of those factors on the response was performed by analysis of variance (ANOVA).
This indicates that the two factors do not work independently, the effect of each factor being affected by the level of other factor.

It is noticeable that both pores contribute to the bending properties.
Hanada, Mechanical properties of porous titanium compacts prepared by powder sintering, Scripta Materialia. 2003 (49) 1197-1202
Zeng, Preparation, microstructure and mechanical properties of porous titanium sintered by Ti fibres, Journal of Materials Science - Materials in Medicine. 2008 (19) 401-405
Brinson, Effects of pore morphology and bone ingrowth on mechanical properties of microporous titanium as an orthopaedic implant material, Materials Transactions. 2004 (45) 1124-1131
Ashby, Cellular solids: structure and properties, 2nd ed, Cambridge, 1997

There is no microcrack in surface layer of the groove, and the depth of work-hardening is less than 40 µm, which indicates that the grinding affected zone is small.
Compared with conventional grinding wheels, CBN wheels have many unique advantages in grinding property, grinding resistance, machine efficiency, workpiece surface, precision and longevity.
Because of the several factors, such as the coating layer is too much deep, the exposing height of the grit is relatively low and the chip space is very limited, the chips are often blocked and the grits are very easy to pull out from the tool substrate under heavy load circumstance during grinding.
There is no microcrack in surface of groove, and grinding affected zone is small.
Xiao: Journal of Mechanical Engineering Vol.38 (2002), pp. 91.

It has a wide range of negative influences on steel properties.
For example, sulfur imposes adverse effects on thermal processing, mechanical properties, weldability, and so on [5].
The most appropriate process flow depends on concentrate properties, difficulty of methods used, and costs.
Considering the ore properties, a joint process of magnetic separation and flotation was carried out.
The interactions between different magnetic intensities and different kinds of mineral ores vary, thereby affecting iron grade and iron recovery.

In this paper, a new type of high temperature plugging agent of tannin foam system was researched, and the influencing factors on it were analyzed.
In this paper, a new type of high temperature plugging agent of tannin foam system was researched, and the influencing factors on it were analyzed.
Considering the gel strength, gelling time and other factors, the eighth set of the experiments is selected as the optimal formula.
Crosslinking agent concentration will directly affect the gelling time and gel strength of tannin, so influence factor research of crosslinking agent appears particularly important.
The influencing factors of concentration of each component, salt tolerance and temperature resistance were analyzed.