Cities of Yuan-Lin and Nantou

ROUTE MAP

     

The four-story building leans due to the collapse of the first floor (23.95N, 120.60E, 08:36:06, September 30, 1999)
Deformation of the sidewalk in front of a building (23.95N, 120.60E, 08:39:36, September 30, 1999)


     

Another view of the concrete sidewalk that bulked due to ground deformation (23.95N, 120.60E, 08:41:03, September 30, 1999)
The prestressed concrete beam of the freeway bridge under construction fell on the ground and broke (23.97N, 120.65E, 09:32:54, September 30, 1999).

     

Two beams on one end fell about 15 feet away from their support, possibly pushed by the other beams due to a domino effect (23.97N, 120.65E, 09:40:23, September 30, 1999)
The steel bridge deck was shored due to the damage of some of its reinforced concrete columns (23.95N, 120.66E, 10:05:11, September 30, 1999).


     

Detail of the damage to the reinforced concrete column of the steel bridge (23.95N, 120.66E, 10:09:53, September 30, 1999).
In the immediate vicinity of the steel bridge, an unreinforced brick column was still standing (23.95N, 120.66E, 10:10:34, September 30, 1999)


     

The first floor of the warehouse collapsed on top of a trailer and delivery truck (23.93N, 120.67E, 10:24:51, September 30, 1999).
The truck and trailer were lifted up by the collapsed building (23.93N, 120.67E, 10:24:57, September 30, 1999).


     

On the other side of the collapsed warehouse, the delivery trucks parked at the warehouse were also pinched and lifted up (23.93N, 120.67E, 10:26:28, September 30, 1999).
Leaning silo after the earthquake (23.93N, 120.67E, 10:35:12, September 30, 1999).

     

Longitudinal cracks in the asphalt road caused by the lateral displacement of retaining wall (23.92N, 120.69E, 10:44:45, September 30, 1999).
The 120 m span steel arch bridge was closed to traffic due to the settlement of its abutment and movement of its deck (23.91N, 120.69E, 10:56:21, September 30, 1999).


     

The shear key of the bridge was sheared due to the lateral displacement of the deck (23.91N, 120.69E, 10:56:25, September 30, 1999).
Sand boils caused by soil liquefaction were clearly detectable in the vicinity of the bridge (23.91N, 120.69E, 10:58:28, September 30, 1999).


     

Other sand boils in the vicinity of the bridge (23.91N, 120.69E, 10:58:32, September 30, 1999).
The concrete lining moved laterally and was crushed against the bridge pier (23.91N, 120.69E, 11:03:14, September 30, 1999).


     

The ground spread laterally along the river bank and distorted the levee (23.91N, 120.69E, 11:04:06, September 30, 1999).
The passage above the drainage channel buckled due to ground deformation induced by liquefaction (23.91N, 120.69E, 11:07:36, September 30, 1999).


     

There were clear signs of liquefaction around the pier of the bridge (23.91N, 120.69E, 11:07:43, September 30, 1999).
A close view of a sand boil close to the bridge pier (23.91N, 120.69E, 11:08:37, September 30, 1999).


     

Another view of sand boils close to the bridge pier (23.91N, 120.69E, 11:11:26, September 30, 1999).
Settlement of the bridge abutment and levee leading to a one-foot separation gap (23.91N, 120.69E, 11:16:30, September 30, 1999).


     

Close view of the gap opened by the abutment settlement (23.91N, 120.69E, 11:16:32, September 30, 1999).
Buckling of the concrete lining due to liquefaction-induced lateral spread (23.91N, 120.69E, 11:18:30, September 30, 1999).


     

The bridge abutment settled about one foot (23.91N, 120.69E, 11:31:32, September 30, 1999).
Damage to levees due to liquefaction induced ground deformation (23.91N, 120.69E, 11:33:24, September 30, 1999).


     

Settlement of the other abutment of the bridge (23.91N, 120.69E, 11:35:44, September 30, 1999).
The other bridge abutment underwent more damage due to the presence of a box culvert passing under it (23.91N, 120.69E, 11:42:10, September 30, 1999).


     

Another view of the damage to the bridge abutment caused by uneven settlement (23.91N, 120.69E, 11:43:21, September 30, 1999).
The bridge abutment settled about 16 inch (23.91N, 120.69E, 11:46:25, September 30, 1999).


     

Longitudinal cracks in bridge abutment associated with settlement (23.91N, 120.69E,, 11:46:39, September 30, 1999).
Longitudinal cracks parallel to the levee caused by liquefaction-induced lateral spreading (23.91N, 120.69E, 11:53:58, September 30, 1999).


     

The building underwent differential settlement and was slightly leaning toward the river (23.91N, 120.69E, 11:56:37, September 30, 1999).
Tensile ground crack parallel to the river bed indicating that the building was on a lateral spread area (23.91N, 120.69E, 12:00:06, September 30, 1999).


     

The tilt of the building was measured to be 4 degree (23.91N, 120.69E, 12:01:23, September 30, 1999).
The building separated from the concrete backyard about 10 inch (23.91N, 120.69E, 12:08:20, September 30, 1999).


     

The building shifted laterally due to liquefaction-induced lateral spread and separated from the concrete backyard (23.91N, 120.69E, 12:09:43, September 30, 1999).
Ground disruption caused by soil liquefaction (23.91N, 120.69E, 12:17:37, September 30, 1999).


     

In Nantou, a new building underwent structural damage (23.90N, 120.69E, 12:30:24, September 30, 1999).
Some cardboard boxes were exposed in the reinforced concrete due to cracking. These did not contribute to the building strength (23.90N, 120.69E, 12:30:24, 12:37:55, September 30, 1999).


     

The metal span bridge slightly sagged on the pier (23.95N, 120.66E, 16:14:49, September 30, 1999).
The soil under the bridge pier settled about one inch (23.95N, 120.66E, 16:26:09, September 30, 1999).


Collapse of the two lower floors of a building in Taichung (24.11N, 120.67E, 17:05:05, September 30, 1999).



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