Cement-stabilized soil is a commonly used pavement base/bottom base material. Adding suitable curing agent to cement-stabilized can effectively reduce the dosage of cement, meet strength requirements, and also greatly improve its water stability. In this paper, three kinds cement (6%, 8%, 10%) were selected add 0.04% organic liquid agent, then compared with high-dose (10% 12%)-stabilized soil. The influence wetting–drying cycles on mechanical properties five stabilized soils was discussed....

Green mining is of great significance for the sustainable development mines. However, current green mine evaluation index system proposed in China complex, and intrinsic logical relationships between indicators are not yet clear. To address this issue, article conducts an in-depth analysis study system. First, 16 directly related to activities were selected. Then, using data technology based on Apriori algorithm, actual 30 open-pit mines analyzed, 7 effective association rules among...

The application of alkali-activated slag (AAS) cementing material to the curing soft soil foundations has a good engineering prospect and is economical environmentally friendly. In this study, three different activators (Na2O·nSiO2, NaOH, Ca(OH)2) were used alkali-activate powder solidify improve in inland port areas. order explore mechanical properties strength formation mechanism AAS-solidified under activators, properties, microscopic tests carried out. Firstly, with unconfined...

In view of the problems difficulties faced in horizontal planting; high labor intensity, poor operation quality and low economy existing sweet potato bare seedling transplanting technology equipment, combined with agronomic requirements planting transplanting, a transplanter is designed, which can realize multiple processes such as rotary tillage ridging, ditching covering soil standing seedlings. The main parameters affecting working performance effect whole machine are analyzed,...

The four-point bending beam fatigue test (4PB), two-point trapezoidal (Trapezoidal Beam), and Overlay Tester (OT) are used to evaluate the performance of six kinds asphalt mixtures that widely in engineering, newly developed ones. result shows that, all three tests, performances 6% SBS (styrene-butadiene-styrene block copolymer) modified mixture is best, those 10% WPE (waxed polyethylene) + 3% SBS, 4% 0.4% PA610, good. warm mixing agent base worst. An increase content can effectively improve...

<title>Abstract</title> Steel trusses have desirable bending performance; accordingly, a new type of stiffen deep cement mixing (SDCM) wall，namely wall (DCM) reinforced with prestressed steel tubular truss, is proposed in this paper. Its performance studied via model tests and 3D finite element simulations cement–soil composite beams. The deformation, stiffness, crack distribution characteristics different beams are compared analysed, the stiffness contribution truss to elucidated. According...

The disposal of tailings has always been a focal point in the mining industry. Semi-dry stockpiling, specifically high-concentration emerged as potential solution. To enhance stability stockpiling and minimize its costs, incorporation low-cost curing agent into is essential. Therefore, this study focuses on development for unclassified stockpiling. composition system determined based theoretical analysis, reaction mechanisms each are researched. Subsequently, an orthogonal experiment...

To address the issues of high labor intensity, excessive manpower requirements, low planting spacing qualification rates, depth and operational efficiency associated with sweet potato transplanting, a seedling belt transplanter has been designed. This machine can perform multiple processes: precision tillage ridge shaping, orderly feeding from rolls, efficient separation seedlings belt, flexible gripping precise soil covering mechanism exposing tips. A three-factor, three-level orthogonal...

Sweet potato is essential for food security, but its transplanting efficiency currently low. To improve this, we developed a belt-type transplanter that uses seedling belt technology automated feeding, increasing by over 25%. The use of the key to significantly enhancing transplanter’s efficiency. Building on designed “trumpet-shaped” staggered detachable using LDPE film. Seedlings are fixed at intervals between two film layers via thermal bonding points. Mechanical analysis showed optimal...

1. Adamkowski A., Henclik S., Janicki W., Lewandowski M., 2017, The influence of pipeline supports stiffness onto the water hammer run, European Journal Mechanics B/Fluids, 61, 297-303. CrossRef Google Scholar

1. Adamkowski A., Henclik S., Janicki W., Lewandowski M., 2017, The influence of pipeline supports stiffness onto the water hammer run, European Journal Mechanics-B/Fluids, 61, 297-303. CrossRef Google Scholar

The main objective of this paper is to study the dynamic performance seals and fatigue failure probability updating a hydraulic steel sluice gate by experiments. First, water seal modifications involving top, side, bottom rotation hinge were performed in order identify test for desired shape functionality. Water sealing experiments under variety conditions performed. It indicated that preset compressive deformation various changed at varying head conditions. Moreover, transformation law...

The construction safety supervision errors can lead to unsafe behavior; further affect the working conditions of workers and result in accidents at last. probabilities data are provided by statistical analysis between different types neighborhood-level factors independence chi-square test. relationship behavioral has been performed order find non-independent factors. Among Human Factors Analysis Classification System (HFACS), impact high-level on bottom level is determined. Based data, work...