Soil compaction

This paper presents a study on settlements of road embankment on soft ground using vertical drains, including prefabricated-vertical drain (PVD), sand drain (SD), and sand compaction pile (SCP) on a number of packages of Hanoi – Haiphong Expressway Construction Project.

12p vithomson 02-07-2024 0 0   Download

This study investigates the impact of roller compaction-induced vibration on the building structure of Ring road No.2 in Hanoi, Vietnam. The finite element method (Plaxis 2D) was applied to evaluate the impact of vibration on surrounding structures.

9p vithomson 02-07-2024 0 0   Download

Part 1 book "Principles of soil physics" includes content: Importance of soil physics; basic definitions and concepts - soil components and phases; soil solids; soil structure; porosity; manifestations of soil structure; soil strength and compaction; soil rheology and plasticity; water; soil’s moisture content.

315p muasambanhan07 08-02-2024 1 0   Download

Part 1 of ebook "Advanced geotechnical analyses: Developments in soil mechanics and foundation engineering-4" has presents the following content: computational approaches to the dynamics and statics of saturated and unsaturated soils; finite element analysis of compaction problems; finite element analysis of the stability of a vertical cut using an anisotropic soil model; finite element simulation of embedded retaining walls;...

165p dieptieuung 19-07-2023 4 2   Download

Part 1 of ebook "Earth structures: In transport, water and environmental engineering" provides readers with content including: Chapter 1 - Introduction – design specification for earth structures; Chapter 2 - Soil as a construction material; Chapter 3 - Geosynthetics in earth structures; Chapter 4 - Soil improvement; Chapter 5 - Limit states for earth structures;...

267p dieptieuung 19-07-2023 3 2   Download

Continued part 1, part 2 of ebook "Geotechnical engineering (Revised third edition)" provides readers with content including: settlement analysis; compaction of soil; lateral earth pressure and stability of retaining walls; bearing capacity; shallow foundations; pile foundations; soil stabilisation; soil exploration; caissons and well foundations; elements of soil dynamics and machine foundations;...

537p dieptieuung 19-07-2023 9 5   Download

Part 1 of ebook "Mechanics of residual soils (Second edition)" provides readers with content including: origin and formation of residual soils; microstructure, mineralogy and classification of residual soils; describing the engineering properties of residual soils as observed in situ; the mechanics of compaction and compacted residual soil; steady and unsteady flow of water and air through soils - permeability of saturated and unsaturated soils;...

167p dieptieuung 19-07-2023 7 2   Download

Part 1 of ebook "Current trends in civil engineering: Select proceedings of ICRACE 2020" has presents the following content: treatment of well water contaminated with septic tank effluent using a modified compacted sand filter; heavy metal fractionation in aerobic and anaerobic sewage sludge; environmental remediation of oil contaminated soil; treatment and reuse of periyar sedimented soil using nanochemicals;...

107p dieptieuung 20-07-2023 7 3   Download

This article applies experimental methods in the laboratory to determine the increase of soil density with explosive energy. The results show that soil moisture, explosive mass, and the distance between compacted soil and the explosion centre have influenced the compaction of the studying soil significantly.

12p viargus 20-02-2023 2 0   Download

Raster time series, a.k.a. temporal rasters, are collections of rasters covering the same region at consecutive timestamps. These data have been used in many different applications ranging from weather forecast systems to monitoring of forest degradation or soil contamination.

26p guernsey 28-12-2021 16 0   Download

The paper presents a series of modified direct shear tests to investigate the interface shear strength between clay and nonwoven geotextile under different normal stresses and degrees of saturation. The modified direct shear apparatus consists of a 60 mm × 60 mm square shear box assembly with a 60 mm × 60 mm acrylic block inserted in the bottom shear box. A woven geotextile layer was glued to the top of the acrylic block, while the top shear box was filled by the compacted clayey soil.

14p chauchaungayxua12 09-07-2021 17 1   Download

A field experiment was conducted at Anbil Dharmalingam Agricultural College and Research Institute, Tiruchirapalli during winter season of 2019 to study the effect of subsurface drip irrigation- fertigation regimes on stalk yield, seed cotton yield and economics of high density cotton cultivation in sodic soil. The experiment was laid out in factorial randomized block design with three replications.

6p cothumenhmong11 11-05-2021 15 2   Download

This thesis studied the soil and the soil properties in the North Central region and proposed reasonable and safe solutions for the design and the construction of compacted earth dams. It meets the requirements for development of economic, social security and defense of the country.

27p dolphintaletale 23-04-2021 19 6   Download

The constraint of labour shortage resulted in modern heavy machineries which form a hard pan on agricultural field. A subsoiler plough is famous for breaking hardpan and working at higher depths. On overview of effects of subsoiler on field is studied. The subsoiler has better performance on improving soil properties such as bulk density, porosity, strength and infiltration rates. The subsoiling also has its effects on root system of plants positively. The crop yields were seen positive or no correlation on subsoiling.

7p chauchaungayxua10 19-03-2021 18 1   Download

Escalated food demands propelled by the ever increasing population demands for increase in crop production. But problems like labour shortages, high input costs and conventional farming practices makes agriculture economically unviable and resulted in its decline, especially in vulnerable communities of the developing world. Use of heavy machinery has been in the increase to tackle the problems of labour shortages but have adverse effects on environment due to soil compaction and the adverse effect on global warming owing to high fossil fuel use.

7p chauchaungayxua11 23-03-2021 18 3   Download

The review study assessed that the adoption of CA in rice-wheat system for a few uninterrupted years can substantially improves the organic carbon carbon status, and reduce the sub-surface compaction and the modified soil environment may promote rice-wheat system productivity in directseeded/ unpuddled transplanted rice and notill wheat system, in comparison to a conventional system, where rice was puddletransplanted followed by conventionally tilled wheat.

18p caygaocaolon7 18-09-2020 10 2   Download

The objectives of sowing operation are to put the seed along with fertilizer in rows at desired depth and seed to seed spacing, cover the seeds with soil and provide proper compaction over the seed. The machinery such as seed cum fertilizer drill with attachment of furrow irrigated raised bed (FIRB), broad bed furrow (BBF) and ridge & furrow systems are used to sow the seeds on raised beds in a pulverized soil so as to allow easy emergence of seed with proper moisture availability and better drainage during excess rainfall events.

12p caygaocaolon6 30-07-2020 23 2   Download

Conservation agriculture (CA) is based on principles of minimum soil disturbance through zero or minimum tillage operations, residue retention on soil surface and crop diversification which not only improves healthy functioning of soil but also enhances nutrient availability, its biological quality and aggregate formation. On the other hand, conventional tillage (CT) practices characterized by excessive tillage, residue removal and monoculture are often associated with the degradation of soil mainly in terms of depletion of Soil Organi arbon (SOC), sub-soil compaction and loss of biodiversity.

8p angicungduoc5 14-06-2020 10 1   Download

Intensive tillage increases soil compaction, reduces soil aggregates stability, disrupts soil productivity, decreases retention and transportation of water and solutes and exacerbates losses due to run-off erosion. In contrast conservation agriculture like zero-till and minimum tillage (reduced tillable) increased porosity, organic carbon, water holding capacity and decreases bulk density.

12p trinhthamhodang1213 29-05-2020 15 0   Download

The decrease of rural population has increased in the recent past which led to feed the growing urban population, for which there is a need to increase the productivity of agriculture has become an essential feature in stepping towards sustainability. Presently, the untilled soil near the bunds and corners of the field are prepared manually which is consuming more time and energy. More over manually made bunds not properly aligned and compacted, and not last for long causing rodent problem.

6p nguaconbaynhay5 16-05-2020 7 0   Download