Crosshole Sonic Logging

Unearthed Excavated Shaft Crosshole Sonic Logging Test

Firm Background Crosshole Sonic Logging Established in San Diego in 1986, Ninyo & Moore is one of the largest engineering firms Crosshole Sonic Logging (CSL) provides a non-destructive method for Quality specializing in Geotechnical Engineering, Assurance (QA) testing of drilled shaft foundations immediately following construction. Environmental Engineering and Materials The CSL method involves transmitting ultrasonic waves through concrete and Testing and Inspection Services. Engineering other materials, including slurry, rock, grout, water-saturated media, or cemented News Record (ENR) recognizes the firm as radioactive wastes. Drilled shafts or caissons are often used to construct special one of the Top 500 Design Firms in the United types of foundations to support critical structures. Some states, such as California States. and New Mexico, specify CSL to QA test the drilled shaft. In the United States, the testing standard is ASTM Standard D6760 and any additional project specifications. Ninyo & Moore has fully equipped and certified in-house testing laboratories that offer CSL testing is used to find defects in the concrete foundation structure. Generally, the full-service field and laboratory services for CSL test is performed during the construction phase or immediately postconstruction geotechnical design, and soil and materials to evaluate whether the shaft has defects, and to report the nature of detected testing projects. defects so that project structural engineers can evaluate whether the structure will perform as intended, and whether remedial steps are needed before the foundation Professional Staff is approved for use. Ninyo & Moore’s staff of 500 certified and CSL is typically used to not only evaluate integrity, but also the possible presence registered professionals includes: and extent of voids and low density or “soft” areas, in a newly constructed drilled • Geotechnical engineers shaft foundation. It is also used to evaluate the integrity of seal footings, diaphragm • Civil engineers walls, and other concrete structures. • Engineering geologists • Hydrogeologists • Geophysicists • Field technicians CSL advantages over CSL advantages over • Special inspectors gamma-gamma QA Sonic Echo (SE) and • Environmental engineers • Environmental scientists logging Impulse Response (IR) • Industrial hygienists • CSL locates concrete or material Tests • Asbestos consultants defects that exist between tubes. • CSL evaluates multiple defects within • Safety professionals • CSL is quicker than gamma- the same shaft. • Indoor environmental consultants gamma. • CSL evaluates the extent, nature, • Microbial consultants • CSL is less expensive than and location of each defect; SE and • Lead consultants gamma-gamma. IR give you only depth of defect. • Qualified SWPPP developers/practitioners • CSL is safer than gamma-gamma • Hazardous waste and regulatory • CSL is sensitive to smaller defects with no need for special security compliance specialists and detected defect depths are more or safety precautions involving accurate than SE or IR methods. radioactive sources. Locations • CSL is not “fooled” by zones of Ninyo & Moore has offices located in the western United States, including California, dense, uncured concrete like Arizona, Nevada, Colorado, Utah, and Texas. gamma-gamma.