公开(公告)号：US09810614B2

公开(公告)日：2017-11-07

申请号：US14439544

申请日：2013-10-28

Applicant: SNCF RESEAU ,  UNIVERSITE DE MONTPELLIER 2 SCIENCES ET TECHNIQUES ,  UNIVERSITE BLAISE PASCAL-CLERMONT II ,  LE CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS)

Inventor： Gilles Saussine ,  Juan Carlos Quezada ,  Pierre Breul ,  Franck Radjai

IPC: G01N3/48 ,  E01B35/00 ,  G01N3/40 ,  E02D1/02 ,  G01N33/42 ,  E01B27/12

CPC classification number: G01N3/48 ,  E01B27/12 ,  E01B35/00 ,  E02D1/022 ,  G01N3/40 ,  G01N33/42 ,  G01N2203/001 ,  G01N2203/0082

Abstract: The method for evaluating the compactness of a layer of railroad ballast near a railroad tie includes at least one step of taking at least two measurements (11,11a,11b) of the penetration resistance (Qd) of the ballast (13) near one and the same railroad tie (10), and a step of calculating the mean value (Qdmean) of these measurements (11,11a,11b) of penetration resistance (Qd). Also provided are a device for implementing such a method and a method for predicting the settlement of the ballast of a railroad track including a step of evaluating the compactness of a ballast near a railroad tie.

公开(公告)号：US20170137309A1

公开(公告)日：2017-05-18

申请号：US15129917

申请日：2015-03-23

Applicant: MS DEVELOPPEMENT ET PARTICIPATIONS ,  UNIVERSITE BLAISE PASCAL-CLERMONT II ,  CNRS CENTRE NATIONAL RECHERCHE SCIENTIFIQUE ,  ECOLE NATIONALE SUPERIEURE CHIMIE CLERMONT-FERRAND-ENSCCF

Inventor： Marcello BRIGANTE ,  Benoit CHAMPEAU ,  Alexandre GUILLAUME ,  Gilles MAILHOT ,  Romain PRULHO

IPC: C02F9/00

CPC classification number: C02F9/00 ,  C02F1/004 ,  C02F1/283 ,  C02F1/66 ,  C02F1/70 ,  C02F2001/007 ,  C02F2101/22 ,  C02F2209/06

Abstract: The method for reducing the chromium content, in particular the hexavalent chromium content, present in a liquid effluent loaded with solid particles, called the initial effluent (1), comprises at least one reduction step (9) by the addition, to the initial effluent, of a weak organic acid (10) in an amount sufficient to reduce the hexavalent chromium present in the initial effluent into a lower valency, namely into trivalent chromium, said step being followed by a step of discharging the treated liquid effluent, called the final effluent. It comprises at least a step of collecting the solid particles present in the initial effluent, at least by settling and a reduction step (9) which is performed after adjustment (12) of the pH of the initial effluent to a pH value lower than the initial pH of the initial effluent while remaining compatible with a discharge of the final effluent at this pH value. The invention also comprises a plant for implementing the method.