Deep Surface Wave Profiling in the Salt Lake Valley (NEES-2006-0173)

<p>Title: Deep Surface Wave Profiling in the Salt Lake Valley (NEES-2006-0173)</p> <p><strong>Year Of Curation: </strong>2011</p> <p><strong>Description: </strong>The purpose of this study is to determine intermediate (250 ft (75 m) to 750 ft (230 m)) to deep (&gt; 750 ft (230 m)) shear-wave velocity (Vs) profiles in the Salt Lake Valley. The Spectral-Analysis-of-Surface-Waves (SASW) method was used in the field to profile 11 locations. Vs profiles from this work have been provided to the Utah Ground Shaking Working Group and added to the community velocity model (CVM). The CVM is the first research goal of a plan developed in 2004 by the Utah Ground Shaking Working Group to develop a ground-shaking map for the Salt Lake region. For the 11 locations tested, six deep and five intermediate Vs profiles were evaluated. An unsuccessful attempt was made to test rock at Sites 5 and 8. All testing was performed using a low-frequency vibroseis called &quot;Liquidator&quot;. Liquidator is specially designed to excite energy in the low-frequency range of 0.5 to 4 Hz. SASW testing at low frequencies allows Vs profiling to greater depths than any other active source. The Vs profiles at the sites were correlated with previous studies performed in the Salt Lake Valley. Most previous work involved Vs profiling at depths less than 150 ft (50 m). The primary focus of this study is to evaluate Vs profiles of the valley sediments at depths below 150 ft (50 m) and to determine the depth to the unconsolidated/semi-consolidated boundary in the Salt Lake Valley.</p> <p><strong>Award: </strong>USGS N/AUtah Geological Survey N/A</p> <p><strong>PIs &amp; CoPIs: </strong>Kenneth H. Stokoe</p> <p><strong>Dates: </strong>July 25, 2006 - August 04, 2006</p> <p><strong>Organizations: </strong>United States Geological Survey (USGS), &nbsp; &nbsp; &nbsp;University of Texas at Austin, TX, United States</p> <p><strong>Facilities: </strong>University of Texas at Austin, TX, United States</p> <p><strong>Sponsor: </strong>USGS - N/A</p> <p><strong>Keywords: </strong>Shear Wave Velocity, Spectral Analysis of Surface Waves</p> <p><strong>Publications:</strong>&nbsp;&quot;SASW Testing in the Salt Lake Valley, UT &quot;</p> <nb:citations></nb:citations>

<p>标题：盐湖谷深部面波勘探剖面（NEES-2006-0173）</p>
<p><strong>数据整理年份：</strong>2011年</p>
<p><strong>研究概况：</strong>本研究旨在获取盐湖谷中等深度（250英尺（75米）至750英尺（230米））至深部（>750英尺（230米））的剪切波速（Shear-wave velocity, Vs）剖面。野外采用面波频谱分析法（Spectral-Analysis-of-Surface-Waves, SASW）对11个测点开展勘探。本研究得到的剪切波速剖面已提交犹他州地面震动工作组，并已加入社区速度模型（Community Velocity Model, CVM）。该社区速度模型是犹他州地面震动工作组2004年制定的盐湖区域地面震动图编制计划的首要研究目标。本次测试的11个测点中，共得到6个深部剪切波速剖面与5个中等深度剪切波速剖面。5号与8号测点的岩石测试未获成功。所有测试均采用名为"Liquidator"的低频可控震源，该设备专为激发0.5至4 Hz的低频能量设计。采用低频开展面波频谱分析测试，可实现比其他主动源方法更深范围的剪切波速剖面探测。本次研究得到的剪切波速剖面与此前在盐湖谷开展的相关研究进行了对比分析，此前多数研究的探测深度均小于150英尺（50米）。本研究的核心目标是评估盐湖谷150英尺（50米）以下的河谷沉积物剪切波速剖面，并确定盐湖谷未固结/半固结沉积物边界的埋深。</p>
<p><strong>资助信息：</strong>美国地质调查局（United States Geological Survey, USGS）、犹他州地质调查局，相关编号未标注</p>
<p><strong>项目负责人及合作负责人：</strong>肯尼思·H·斯托基（Kenneth H. Stokoe）</p>
<p><strong>测试周期：</strong>2006年7月25日—2006年8月4日</p>
<p><strong>依托单位：</strong>美国地质调查局（USGS）、美国得克萨斯大学奥斯汀分校（得克萨斯州，美国）</p>
<p><strong>实验设施：</strong>美国得克萨斯大学奥斯汀分校（得克萨斯州，美国）</p>
<p><strong>赞助方：</strong>美国地质调查局（USGS），相关编号未标注</p>
<p><strong>关键词：</strong>剪切波速、面波频谱分析法</p>
<p><strong>相关出版物：</strong>《犹他州盐湖谷面波频谱分析测试》（"SASW Testing in the Salt Lake Valley, UT"）</p>
<p><nb:citations></nb:citations></p>