Importance of Dewatering in Construction
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Questions and Answers

Why is dewatering important for trenching and pipelaying activities?

  • To minimize the discharge of sediment-laden water into surrounding water bodies.
  • To create dry and stable excavation conditions. (correct)
  • To prevent settlement and heave in the soil.
  • To reduce the risk of accidents on the construction site.

What is the purpose of a dry well in a drainage system?

  • To collect surface water
  • To store excess groundwater
  • To increase stormwater runoff
  • To allow surface water to percolate away (correct)

What is the function of a culvert in infrastructure?

  • To channel water under a road or sidewalk (correct)
  • To retain heavy sediment
  • To increase hydrostatic pressure
  • To collect rainwater

How does dewatering benefit the installation of underground utilities?

<p>By reducing the risk of damage and ensuring proper alignment and placement. (D)</p> Signup and view all the answers

What is the role of a headwall in a drainage system?

<p>To serve as an inlet retaining wall for a drain (C)</p> Signup and view all the answers

What is the primary role of dewatering in pipelaying activities?

<p>Facilitating the installation of pipelines with greater efficiency. (C)</p> Signup and view all the answers

What defines a box culvert in drainage infrastructure?

<p>Rectangular cross section (D)</p> Signup and view all the answers

How does dewatering contribute to environmental protection during pipelaying?

<p>By minimizing the discharge of sediment-laden water into water bodies. (D)</p> Signup and view all the answers

How does a catch basin contribute to a drainage system?

<p>By collecting surface water and retaining sediment (C)</p> Signup and view all the answers

In what way does a manhole support urban infrastructure?

<p>By allowing maintenance access to sewers or drains (A)</p> Signup and view all the answers

Which aspect is most directly influenced by dewatering in trenching activities?

<p>Stability of excavation conditions. (B)</p> Signup and view all the answers

Which outcome does dewatering help to prevent during trenching activities?

<p>Settlement and heave in the soil. (C)</p> Signup and view all the answers

Which equipment is commonly used for achieving the desired soil density and stability when working with moist soil?

<p>Vibratory rollers and plate compactors (A)</p> Signup and view all the answers

In what kind of soil conditions is an excavator bucket with teeth ideal?

<p>Moist, sticky soil (B)</p> Signup and view all the answers

What challenges can high moisture content in soil lead to?

<p>Clumping and handling difficulty (D)</p> Signup and view all the answers

How can poorly managed surface water runoff impact a construction site?

<p>Necessitate additional corrective measures due to erosion (B)</p> Signup and view all the answers

What is the primary purpose of using dewatering pumps at construction sites?

<p>To remove excess water and maintain a dry worksite (B)</p> Signup and view all the answers

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