Geotechnical Site Investigation

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What is the primary purpose of site mapping in a construction project?

To design the foundation of structures
To determine the location of borrow regions
To identify potential geological hazards (correct)
To document construction progress

What type of information is typically included in a foundation map?

Hydrologic, lithologic, and structural aspects (correct)
Only hydrologic aspects
Only rock reinforcing systems
Only lithologic aspects

What is a major limitation of hand augering as an excavation technique?

The soil is highly disturbed and mixing of soil types occurs (correct)
It is a time-consuming process
It is not suitable for rocky areas
It is expensive

What is the purpose of preparing a map for soil and rock areas?

To show any feature installed to improve, modify, or control geologic conditions (A) Signup and view all the answers

Who should work together to accomplish site mapping?

Geologists and geotechnical engineers (B) Signup and view all the answers

What is a potential geological hazard that can be identified through site mapping?

All of the above (D) Signup and view all the answers

What is the primary goal of site exploration direct approaches?

To understand the ground conditions at a construction site and its surroundings (A) Signup and view all the answers

What is the primary purpose of a detailed site investigation?

To gather information on subsurface conditions (A) Signup and view all the answers

What is a limitation of hand augering in subsurface exploration?

It causes mixing of soil types and disturbance of samples (B) Signup and view all the answers

What is the purpose of the casing in percussion boring?

To prevent hole collapse (A) Signup and view all the answers

What is a concern related to subsurface water conditions?

Moderate or rapid water loss (D) Signup and view all the answers

What is the function of the shell and clay cutter in percussion boring?

To make cuts in the ground and create a hole (D) Signup and view all the answers

What is a key aspect of assessing storage reservoir basins?

Their freedom from sinks, permeable strata, and fractures or fissures (C) Signup and view all the answers

What type of equipment is typically used for detailed site investigations?

Bulldozers, power augers, and drill rigs (C) Signup and view all the answers

What is the maximum depth that can be reached using percussion boring?

60 meters or more (A) Signup and view all the answers

Why is knowledge of foundation materials and conditions important?

To serve as a basis for geologic interpretation and structural design (A) Signup and view all the answers

What is the final output of the site exploration process?

A report detailing the findings, including geological plans and sections (C) Signup and view all the answers

What is the benefit of allocating sediment storage?

To ensure storage capacity during the design life of the structure (B) Signup and view all the answers