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DV SWE > UIP CH3 > Flashcards

UIP CH3 Flashcards

1
Q

What are the different condition ratings for concrete piles?
NI
ND
MN

A 
NI - Not  Inspected (Inaccessible or passed by)
ND- No Defects 
- Hairline  Cracks
- Good original surface,  hard material
MN - Minor Defects 
-Good Original Surface 
-Minor Cracks or Pits 
-Slight rust stains 
-hard material, sound 
-Corrosion of the wires
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2
Q

What are the different conditions ratings for concrete piles?
MD
MJ

A 
MD -  Moderate Defects 
- limited spalling of concrete
- minor  corrosion of the exposed re-bar
- rust stains along re-bar 
- reinforcing steel ties exposed 
- pop-outs  of impact  damage   
MJ -  Major Defects  
*Spalling of concrete results in (10-15%)  loss*
-  large spall 
- deep wide cracks along rebar  
- major rust strains along rebar  
- wide spread surface disintegration
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3
Q

What are the different condition ratings for concrete piles?

SV

A

SV - Severe Defects

  • exposed rebar with 50% loss of steel section area
  • More than 15% loss of concrete*
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4
Q

What should be included in a color photograph of U/W damaged areas?

A

A color Chart

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5
Q

What are the different exposure zone on a piling?

A 
Atmospheric Zone
Splash Zone 
Tidal Zone 
Submerged Zone 
Mud Zone
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6
Q

What is a level 1 inspection?

A

A general visual inspection that does not involve cleaning and can be conducted rapidly

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7
Q

What is a level 2 inspection?

A
  • A close up-visual inspections
  • Cleaning is restricted to critical areas that are typical of entire structure
  • Subjective Judgement of structural integrity are occasionally made by probing wood w/ice picks & by pounding concrete with hammers
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8
Q

What is a level 3 inspection?

A
  • Highly detailed inspection
  • Used to detect hidden or imminent damage
  • Often required NDT techniques
  • Usually limited to key structural areas that may be suspect, or to structural areas that may be representative of the overall structure
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9
Q

What are the different conditions ratings for timber piles?
NI
ND
MN

A 
NI - Not Inspected, inaccessible or passed by 
ND - No Defects 
*Less than 5% list material*
-Sound surface material 
-No evidence of borer damage 
MN - Minor Defects 
*5% to 15% lost material*
-Sound surface material 
-no evidence of borer damage 
-minor abrasion damage
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10
Q

What are the different condition ratings for timber piles?
MD
MJ

A 
MD - Moderate Defects 
*15% to 45% lost material*
-Significant loss of outer shell material 
-Evidence of borer damage 
-Significant abrasion damage
MJ - Major Defects 
*45% to 75% lost material*
-Significant loss of outer shell & interior material 
-Evidence of severe borer damage 
-Severe abrasion damage
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11
Q

What are the different condition rating for timber piles?

SV

A

SV - Severe Defects

  • More thank 75% lost material*
  • No remaining structural strength
  • Severe borer damage
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12
Q

Tell me about marine borers?
Ship worms
Gribbles
Pholdds

A

Shipworms
-Tropical climates 6 FT in length and 3 IN in diameter
-North America 6 to 8 IN in length and 1/2 In in diameter
Wood Gribbles- Small 1/8 to 1/4IN
Pholdds - 2 to 2 1/2 IN long and 1 IN in diameter

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13
Q

What do you need to watch out for when operating the rebound hammers?

A

Do not operate the rebound hammer with the impact plunger in contact with human body parts; serious injury can result

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14
Q

What tools are used to inspect U/W concrete going with non-destructive testing techniques?

A

1 - Magnetic rebar locator
2 - Rebound hammer
3- Ultrasonic System

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15
Q

Deterioration of concrete waterfront structures is caused primarily by?

A 
1 - Corrosion of steel reinforcement
2 - Repetitive freezing & thawing of moist concrete 
3 - Abrasion 
4 - Chemical Deterioration 
5 - Structural overloading
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16
Q

Tell me about chain?

A

Comes in 90FT lengths called shots

It can be cast forged or dilock

17
Q

What are the 6 major causes of steel structure deterioration in the marine environment?

A 
1 - Corrosion
2 - Abrasion 
3 - Loosening of structural connection 
4 - Overloading 
5 - Fatigue
6 - Loss of foundation Material
18
Q

A loss of foundational Material in front of a steel pile bulkhead that may cause a kick-out of the toe of the wall & result in total failure, is an example of what type of major steel deterioration?

A

Foundation Deterioration

19
Q

What is the principal cause of deterioration of steel waterfront structures?

A

Corrosion

20
Q

When taking U/W photographs of damage what must be included?

A

Photographs should be numbered, dated & labeled with a brief description of the subject

DV SWE (16 decks)

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