详情

Characterization of Soil and Rock for Transportation Infrastructure Using Seismic Methods in Wyoming

项目名称：	Characterization of Soil and Rock for Transportation Infrastructure Using Seismic Methods in Wyoming
摘要：	The Load Resistance and Factor Design (LRFD) method currently in use by Wyoming Department of Transportation (WYDOT) allows the designer to develop soil and rock specific resistance factors depending on the testing and analyses of foundation and soil elements. Currently Kam Ng has initiated testing necessary to calibrate the resistance factors for driven piles in soft rocks (RS06216). This research is in its beginning stages but may be enhanced with more detailed sub-surface data. For example, one important factor when designing pile foundations is the weathered rock / hard rock transition zone. This zone can be hard to sample and is an important layer for pile driving and foundation design. Current design practice in Wyoming is to perform sub-surface exploration using borings, SPT analyses for soils, coring rock, and a drive point method specific to WYDOT. These methods have proven to work well in the past, and are still a source of vital information for today’s bridge and foundation designs. The data obtained from these investigation can be enhanced using seismic techniques in sub-surface investigation which will allow designers to accurately measure the depth of the transition zone and modulus over a large area. The seismic methods proposed in this project include compression wave refraction and surface wave testing. This project, will allow researchers at the University of Wyoming to perform refraction and surface wave testing at 9 sites in Wyoming. These 9 sites include 3 sites where advanced load and osterburg cell tests will take place. The load and osterburg tests will provide the highest quality field test data available and will be complimented by the seismic testing. It is hoped that by performing advanced seismic surveys at these 9 sites future predication and correlation information will be determined. The correlations will be a value to WYDOT, and other states building bridge foundations in similar soft rock conditions. Additionally, better subsurface investigations will yield better predictions concerning depth of competent rock which may help control costs. Long-term benefits include development of shear wave velocity information being used to help classify rock types or behavior. By performing this research WYDOT will be following recommendations from the Federal Highway Administration (FHWA) which encourages the use of different and new sub-surface investigation techniques (Rivers and Nichols, 2019). The purpose of this project is to set forth the terms and conditions by which the Contractor shall perform refraction and surface wave testing at nine (9) sites in Wyoming.
状态：	Active
资金：	171668
资助组织：	Wyoming Department of Transportation
项目负责人：	Hood, Kirk
开始时间：	20200106
预计完成日期：	20220531
主题领域：	Geotechnology；Transportation (General)