Consulting Engineers Group Site Engineer Interview Questions and Answers

Socketing criteria for piles in hard rock involves determining the depth of socket required based on rock strength and load capacity.

• Socketing depth should be at least 1-2 times the diameter of the pile for hard rock.

• Rock strength should be assessed using methods like rock core testing or Schmidt hammer test.

• Load capacity of the pile and expected loads should be considered when determining socketing criteria.

• Socketing ...read more

CHSL is used to determine the length of a pile while Pile Integrity Test is used to assess the integrity of a pile.

• CHSL (Cross Hole Sonic Logging) is used to determine the length and integrity of a pile by sending ultrasonic waves between tubes installed in the pile.

• Pile Integrity Test is used to assess the integrity of a pile by sending stress waves through the pile and analyzing the reflected waves to detect any defe...read more

Stressing of I girder involves pre-tensioning steel strands before grouting to ensure structural integrity.

• Pre-tensioning steel strands to desired level of stress

• Grouting process to fill voids and bond strands to girder

• Monitoring stress levels during and after grouting

• Ensuring proper curing of grout for strength

The grade of steel used for structures depends on the specific requirements and design considerations.

• The grade of steel is determined based on factors such as strength, ductility, weldability, and corrosion resistance.

• Common grades of structural steel include ASTM A36, ASTM A572, and ASTM A992.

• Higher grade steels are typically used for more demanding applications or in seismic zones.

• The grade of steel may also vary de...read more

Quality of concrete can be checked through various tests and inspections.

• Perform slump test to check workability of concrete

• Conduct compressive strength test to assess the strength of concrete

• Check for air content to ensure proper mix design

• Inspect for cracks, honeycombing, segregation, and other visual defects

• Use non-destructive testing methods like ultrasonic pulse velocity testing

The slump required depends on the specific project requirements and the type of concrete being used. Admixtures are used to modify the properties of concrete.

• Slump requirements vary based on project specifications and concrete mix design

• Admixtures are used to improve workability, strength, durability, or other properties of concrete

• Examples of admixtures include water reducers, accelerators, retarders, and air-entraini...read more

Pile bents can be prevented by proper design, installation, and maintenance.

• Ensure proper soil investigation and design of pile foundation

• Use high-quality materials for pile construction

• Ensure proper installation techniques are followed

• Regularly inspect and maintain the pile foundation

• Consider using protective measures such as cathodic protection or coatings

• Monitor the structure for any signs of distress or movement

The clearance between girder and ground depends on the design and specifications of the bridge.

• The clearance is determined by the height of the girder and the elevation of the ground.

• It is important to ensure that the clearance is sufficient for any vehicles or pedestrians passing underneath the bridge.

• The clearance may vary depending on the location and purpose of the bridge.

• For example, a highway bridge may have a hi...read more

We are using reinforced concrete piles for this project.

• Reinforced concrete piles are commonly used for their strength and durability.

• They are ideal for projects that require deep foundations or support for heavy structures.

• Other types of piles include timber, steel, and composite piles.

• The choice of pile depends on factors such as soil conditions, load requirements, and cost.

• We have selected reinforced concrete piles ...read more

A reaction pile is a type of foundation pile used to resist horizontal loads.

• It is installed at an angle to resist lateral forces.

• It is commonly used in retaining walls and bridge abutments.

• It can be made of steel, concrete, or timber.

• It is designed to transfer the load to the surrounding soil or rock.

• It is also known as a batter pile or inclined pile.

There are several types of piles used in construction, including driven piles, bored piles, and screw piles.

• Driven piles are hammered into the ground using a pile driver.

• Bored piles are created by drilling a hole and filling it with concrete.

• Screw piles are twisted into the ground using a hydraulic torque motor.

• Other types of piles include sheet piles, composite piles, and helical piles.