Найти книгу: "Bento's Sketchbook"

A meditation, in words and images, on the practice of drawing, by the author of Ways of Seeing. The seventeenth-century philosopher Baruch Spinoza—also known as Benedict or Bento de Spinoza—spent the most intense years of his short life writing. He also carried with him a sketchbook. After his sudden death, his friends rescued letters, manuscripts, notes—but no drawings. For years, without knowing what its pages might hold, John Berger has imagined finding Bento’s sketchbook, wanting to see the drawings alongside his surviving words. When one day a friend gave him a beautiful virgin sketchbook, Berger said, “This is Bento’s!” and he began to draw, taking his inspiration from the philosopher’s vision. In this illustrated color book John Berger uses the imaginative space he creates to explore the process of drawing, politics, storytelling and Spinoza’s life and times.

Pipe jacking is a construction process for the no-dig laying of pipes. Successful pipe jacking demands low skin friction between the ground and the jacked pipe. This is achieved with bentonite lubrication. The bentonite slurry fed into the annular gap fulfils several purposes. It stabilises the annular gap by supporting the surrounding ground and reduces friction contact between ground and jacked pipe. The Bentonite Handbook deals comprehensibly with the relevant aspects of annular gap lubrication: starting with the ground conditions, which are of decisive importance for lubrication, through the rheological properties of the bentonite slurry to the technical components of lubrication technology and lubrication strategy. The use of standardised measuring apparatus is described as well as mixing equipment and the automatic lubrication system. Overview tables with calculations and suggested values for bentonite consumption quantities depending on the prevailing ground conditions and the pipe jacking parameters complete the recommendations.

Der Rohrvortrieb ist ein Bauverfahren zur grabenloser Verlegung von Leitungen. Ein erfolgreicher Vortrieb erfordert eine geringe Mantelreibung zwischen Baugrund und Vortriebsrohr. Dies wird uber eine Bentonitschmierung erreicht. Das im Ringspalt eingebrachte Bentonit erfullt hierbei mehrere Aufgaben. Zunachst stabilisiert es den Ringspalt durch Stutzung des Untergrunds und soll damit den direkten Kontakt Untergrund zu Vortriebsrohr vermeiden. Zusatzlich verringert es als Schmiermittel die Reibung zwischen Untergrund und Rohrstrang. Dieses Handbuch behandelt nahezu alle Aspekte der Ringraumschmierung. Angefangen von den fur die Schmierung ma?geblichen Untergrundbedingungen, uber die Eigenschaften des Bentonits bis hin zu den technischen Aspekten. Dabei sind zu nennen die Handhabung des Messequipments, der richtige Einsatz der Mischausrustung und der Quelltanks, Details uber den Einsatz des automatischen Bentonitschmiersystems sowie Berechnungen und Vorschlagswerte uber Bentonitverbrauchsmengen in Abhangigkeit von Untergrund und Vortriebsmaschinengro?e.