foundation system of burj al arab

Foundation Scouring Scenario of Bridges in United States (Part-2)

Dear reader we have learnt about failure details of Schoharie Creek Bridge and I-5 Bridge. In I-5 Bridge the casualties are as follows:

  • 1 truck and 4 cars fell into Arroyo pasajero
  • 7 people were killed.

Bridge AA-438:


Location: prairie country in the vicinity of Saugus, Montana.


Date of failure: 19th June, 1938.


Collapse of Bridge AA-438

CRANDIC Bridge failed with 15 rail cars
Cause of failure:

The velocity and volume of flowing water reached beyond expectation which led two of pier at central portion to undermine, the weight of locomotive passing over the rail bridge resulted subsidence of bridge piers and finally total collapse occurred.

Casualties:

  • Locomotive fell into creek
  • 47 people (at least) killed.


CRANDIC Bridge (Cedar River Railroad Bridge):


Location: Spanning over Cedar River in Iowa.

Date of failure: 12th June 2008.

Causes of failure: Three steel spans out of total four spans were swept out.


Casualties:

15 rail cars of CRANDIC were swept with bridge. No injuries or life loss were recorded.


Of these bridge failures, collapse of Schoharie creek bridge drawn attention from Federal Highway Administration and they provided regulation to monitor conditions of scouring of bridge over all states of United States.


Around 19% of federal emergency funds for Highway restoration work are required to restoration for bridges in United States. Within 1980-1990, the Federal Authority spent an average 20 million dollar per year for restoration of bridges and we know restoration works involve scouring of foundation elements.

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