Civil Engineering

Geotechnics of Organic Soils and Peat - download pdf or read online

Posted On April 20, 2018 at 5:27 pm by / Comments Off on Geotechnics of Organic Soils and Peat - download pdf or read online

By Bujang B.K. Huat

ISBN-10: 0415659418

ISBN-13: 9780415659413

Peat and natural soils normally ensue as super smooth, rainy, unconsolidated surficial deposits which are a vital part of wetland structures. all these soils may give upward thrust to geotechnical difficulties within the zone of sampling, payment, balance, in situ trying out, stabilisation and building. there's hence a bent to both steer clear of development on those soils, or, whilst this isn't attainable, to easily eliminate or substitute soils, which in a few circumstances can result in potentially uneconomical layout and development choices. despite the fact that, in lots of nations of the realm, those soils conceal a considerable land quarter and strain on land use is leading to ever extra widespread utilisation of such marginal grounds.

For the winning layout, building and function of constructions on such marginal soils, it is important to foretell geotechnical behaviour by way of cost, shear energy and balance, with admire to time. this implies increasing our wisdom base and demands a competent characterisation in their geotechnical houses and mechanical behaviour and as a result, the devising of compatible layout parameters and building recommendations for facing those materials.

A sound medical realizing of the character and services of peat and natural soils is necessary to their right and secure use, and this booklet contributes by way of providing scholars, researchers, engineers and lecturers concerned with these kind of soils a finished evaluate. This ebook might be precious not just to these within the box of geotechnical engineering, but additionally to soil scientists and agriculturalists, who're interested by the advance of peatlands.

 

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Additional resources for Geotechnics of Organic Soils and Peat

Sample text

Alternatively, ignition of the soil at high temperature (450 °C to 550 °C) to achieve destruction of organic matter can be used to determine organic content directly. The loss-on-ignition method gives quantitative oxidation of organic matter, but because it may decompose some of the inorganic constituents of the soil it may give a number in excess of the actual organic content (Edil, 2003). Procedures for obtaining the organic content of peat by the loss on ignition method will be described later in this chapter.

Pseudofibrous peat is moderately humified and has an indistinct to relatively distinct plant structure. It is usually brown. If a sample is squeezed in the hand, less than half of the peat mass passes between the fingers. The material remaining in the hand has a more or less mushy consistency, but with a distinct plant structure (H5–H7). Amorphous peat is highly humified and the plant structure is very indistinct or invisible. It is brown to brown-black in colour. If a sample is squeezed in the hand, more than half of the peat mass passes between the fingers without any free water running out.

The Japanese Committee of Soil Sampling has proposed the Japanese 75 mm fixed piston sampler as the standard in Japan. The boring rod is connected to the upper end of the sampler head and the sampling tube is connected to the lower end. 15 Cross-section of piston sampler (after Huat, 2004). mechanism in the head allows only the upward movement of the piston rod, thus preventing loss of the sample when the sampler is withdrawn from a borehole. A ball cone clamp is typically used as a locking mechanism.

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Geotechnics of Organic Soils and Peat by Bujang B.K. Huat


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