From ceginfo@u.washington.edu Tue Nov 30 16:06:56 2004 Received: from mxi3.u.washington.edu (mxi3.u.washington.edu [140.142.32.176]) by lists.u.washington.edu (8.13.1+UW04.08/8.13.1+UW04.08) with ESMTP id iB106uwY052250 for ; Tue, 30 Nov 2004 16:06:56 -0800 Received: from mxout3.cac.washington.edu (mxout3.cac.washington.edu [140.142.32.166]) by mxi3.u.washington.edu (8.13.1+UW04.08/8.13.1+UW04.09) with ESMTP id iB106tCj020068 (version=TLSv1/SSLv3 cipher=EDH-RSA-DES-CBC3-SHA bits=168 verify=NO) for ; Tue, 30 Nov 2004 16:06:56 -0800 Received: from homer05.u.washington.edu (homer05.u.washington.edu [140.142.15.39]) by mxout3.cac.washington.edu (8.13.1+UW04.08/8.13.1+UW04.09) with ESMTP id iB106tdY023664 for ; Tue, 30 Nov 2004 16:06:55 -0800 Received: from localhost (ceginfo@localhost) by homer05.u.washington.edu (8.13.1+UW04.08/8.13.1+UW04.08) with ESMTP id iB106tdM248290 for ; Tue, 30 Nov 2004 16:06:55 -0800 Date: Tue, 30 Nov 2004 16:06:55 -0800 (PST) From: Civil and Environmental Engineering To: cegrads@u.washington.edu Subject: December 9th Geotech Seminar (fwd) Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed X-Uwash-Spam: Gauge=IIIIIII, Probability=7%, Report='__C230066_P1_5 0, __C230066_P2 0, __CT 0, __CT_TEXT_PLAIN 0, __HAS_MSGID 0, __MIME_VERSION 0, __SANE_MSGID 0' This is an announcement for the upcoming University of Washington Geo-Institute Graduate Student Society seminar by Dr. Karen Henry of the Cold Regions Research and Engineering Laboratory. The talk, entitled "Frost Jacking of Unexploded Ordnance" will be held at 4:00 pm on Thursday December 9th, in More Hall, Rm 225. The presentation abstract and speaker bio follow. Kathryn Petek President, Geo-Institute Graduate Student Society University of Washington ---------------------------------------------------------------- ABSTRACT: We hypothesized that frost jacking (net seasonal upward movement) of buried unexploded ordnance (UXO) occurs in cold regions where there is frost-susceptible soil and adequate moisture. In the summer of 2003 we buried 18 inert ordnance shapes in highly frost-susceptible soil in Hanover, NH, to determine whether they would experience frost jacking. Sixteen of the shapes were used for two, three-way factorial experiments to study frost jacking as a function of specific ordnance type, burial depth, and orientation (vertical or at 45). Frost jacking of ordnance occurred between September 2003 and May 2004, and the net upward movement for objects buried from 4 to 36 inches deep ranged up to 3.2 inches. During winter, the ordnance moved upward at approximately the same rate at which the ground heaved; however, during thaw the ground usually subsided to a greater degree than the ordnance. Variability of net upward movement was very high. The group of ordnance that included 2.75-inch rockets and 81-mm mortars buried 24 to 36 inches deep moved upward more than the smaller 20- mm and 40-mm projectiles buried at depths of 4 to 12 inches. BIO: Karen Henry is a Research Civil Engineer at the USACE Engineer Research and Development Center: Cold Regions Research and Engineering Laboratory. She received her BS in Geological Engineering from Michigan Tech, MSCE from Northwestern University, and her PhD from the University of Washington. Dr. Henry's research is in geotechnical and geoenvironmental engineering and her interests include the migration of frost effects in soils, use of geosynthetics in cold regions, geosynthetic reinforcement of soil, environmental applications of geosynthetics and the use of recycled crushed glass as unbound aggregate. .