Hiroshima new transportation system bridge girder fall accident
 Intersection (January, 2007) that became the scene of the accident | |
| Date | 1991March 14 |
|---|---|
| Time | 14:05 (JST) |
| Place | HiroshimaHiroshima-shiAsaminami-ku |
| Dead person, injured person | |
| 15 death [1] | |
| Eight injuries [1] | |
The accident that the Hiroshima new transportation system bridge girder fall accident (ひろしましんこうつう system はしげたらっかじこ) was the construction spot of Hiroshima Rapid Transit Hiroshima new traffic Route 1 (nickname Astra irregularity in) under construction in those days, and a bridge girder dropped, and a commoner and 23 workers were killed or injured.
Table of contents
Summary of the accident
The accident that a bridge girder dropped during work to install 63m in length, 1.7m in width, thickness 2m, a steel bridge girder made which I installed provisionally of 60t in weight [1] [2] in the Hiroshima prefectural road 38 Yasushi Asa Furuichi line (existing Hiroshima prefectural road 38 Hiroshima Toyohira Line) under 10m occurred the day before (1991) at about 2:05 [1], 2, Kamiyasu, Asaminami-ku, Hiroshima-shi, Hiroshima (the neighborhood of existing Hiroshima Rapid Transit Hiroshima new traffic Route 1 Kamiyasu Station) on the afternoon of March 14 in 1991.
In this accident, the bridge girder hit 11 including the car which stopped at a red light in the prefectural road down line which ran side by side directly [1], and worked on one of a bridge girder, and death, nine were due for a serious or slight injury 14 of nine that took five workers and car thrown out below in total (one serious wound recognizes it as the death caused by accident later); [2]. In the car which caught the direct hit of the fall of the bridge girder, there was the thing compressed to approximately 50cm in height by the weight of the bridge girder, and there was the thing which a fire occurred again, and was wrapped in flame. A bridge girder was removed by a crane approximately two hours after an accident, and the victims shut in by a crushed car were rescued, but, as for nine dead people, all were approximately states of the instant death.
Cause of the accident
The Hiroshima Prefectural Police searched bridge maker "Sakurada" (the head office: Ichikawa-shi, Chiba) who undertook Hiroshima-shi government office and work on the charge of professional negligence resulting in death and injury. As a result, it became clear that there were the following defects in work.
Work mis
Because it was (safety zone of the one side two traffic lane), the scene of the accident was not able to secure a construction site enough on a prefectural road. Therefore I adopted a method to call "an assumption descent method of construction" to let you descend to be attached to each supporting beam after having moved parts to a supporting beam on a supporting beam in the right angle direction. I let you descend while repeating jack operation after having put it to the temporary cradle in this method of construction once and finally fixed it to a stand called 沓座 on the supporting beam. I completed 仮置 きが by the day before, and setting to fix a jack put to three supporting beams to a pedestal after having descended in turn worked on the day of the accident.
However, three H rolling steel of the temporary cradle was put, but the H rolling steel which there was in the south side of the western supporting beam in work points made mistake of work did not it-formed, to load a double cross onto one line in the direction. When exchange worked to pull H rolling steel of one that purpose, and to adjust the height of the temporary cradle, 6.6mm in depth, a range of 300mm buckled it a base of the south side of the bridge girder because load became disproportionate. Therefore two were beyond a load power-resistant among three jacks which supported a principal beam because the weight of the bridge girder deviated to the south side. As a result, the H rolling steel of the bolster of two jacks buckled it approximately at the same time and dropped below while I lost balance, and a bridge girder half-turned it.
In addition, I hung it to a bridge girder and the supporting beam, and a scaffold set it up, and the worker one who worked who blocked up the gap of footing there dropped with four workers who operated a jack. A worker spoke, "a jack is abnormally heavy" just before that, and there was omen of buckling it, but it was the system which nobody noticed on the site and has been overlooked like later description.
Mis of a worker and the construction plan
There was not the construction unification person in charge (construction director) of Sakurada of the original contractor in the spot while knowing the plan of the descent work. In addition, the construction spot agent left without warning the setting method of the jack, and I only gave the aide agent jack bottom げの instructions and went down below, and the real field overseer left it to the staff of the second subcontract. However, it was only rambling, and this staff only saw it until one month ago because it was an office worker, and there was no technical knowledge of the construction that spot experience grieved at.
The contract of the construction construction of the bridge girder was the first construction company of the third subcontract in charge of the scene of the accident. Two of four people who operated a jack were scaffolding erectors, but spot work included a blank, and there was not really the experience that I constructed it and constructed of the bridge. Remaining two people were the beginners who engaged in the processing sale of glasses until several months ago. In other words, it was in condition to entrust the worker who looked like an amateur while being the dangerous work called the jack descent of heavy goods. In addition, as for the person who noticed that I piled it up wrong and I carried out a fatal activity and made a mistake called (strength is completely short to receive a bridge girder) of the H rolling steel, there was nobody. In this background, construction was carried out for Asian Games preparations at each site in Hiroshima, and an expert worker has lacked it for a serious labor shortage. Therefore the amateur worker whom only head count prepared would carry out a dangerous activity.
A contract of the construction became the hierarchical structure including an original contractor and the subcontract in this way, and the construction management system had a problem. The plan of operation that should be made did not exist, and even the explanation of the procedure was not originally carried out for a worker. In addition, the examination of the construction method was insufficient, too and independent took down a beam without putting a wire for the prevention of fall, and there was not the preparation such as the fall preventive measures against worst states.
Traffic regulation
Because the prefectural road concerned had 15,000 daily quantity of traffic, and there was not a detour elsewhere, and Hiroshima-shi insisted from the geographical features in the valley when a traffic jam got up when I regulated traffic, and the Hiroshima Prefectural Police agreed to this, I did not regulate the traffic of the prefectural road [2].
Trial
As for the responsibility investigation for the person concerned, a construction worker was charged as a criminal case under an accusation of professional negligence resulting in death.
The Hiroshima District Court handed down a decision of stay of execution four years on stay of execution three years [1], aide spot agent to a prison sentence [1] of June, a bridge construction director in spot agent in June for 2-year imprisonment for 2-year imprisonment for 2-year imprisonment in March, 1996 [1]. However, the staff whom I supervised really denied liability arising from negligence on the site saying "it was only watch positions such as the communication without knowledge, ability" and was found innocent.
In addition, for the construction supplier, I was assigned to heavy administrative deposition such as a nomination stop or the suspension of business [1].
It was still less called into question about the criminal liability of Hiroshima-shi that placed an order for construction, but I affirmed that there was foreknowledge possibility by the first trial judgment of the civil action that the bereaved of the accident raised, and there was Sorgfaltspflicht, and compensation for damages responsibility was the judgment that there was, but legal binding force became extinct with a construction supplier because a plaintiff demanded a quick trial at the appeal court that Hiroshima-shi appealed against and abandoned the right to claim for the city [1].
The post of the case
Hiroshima-shi switched a policy saying that I did not hold traffic regulation during construction and I established the detour and did it for full-scale suspension of traffic and changed it in a method of construction to install by a crane directly. In addition, measures to interrupt traffic would be carried out nationwide in the spot where danger was expected, and the safety education of the worker came to be thorough.
The bridge girder which dropped was subjected to the disposal after removal, and the bridge girder of the neighborhood of scene of the accident was had made newly. In addition, a memorial service monument was erected under the Kamiyasu Station south stairs which became the neighborhood of spot in March in the next year. Mayor Hiroshima, deputy mayor (the deputy mayor), three people of the road traffic chief of the bureau visit it and promise security every year on the day when an accident occurred.
Footnote
References
- It is ISBN 978-4,805,911,624 in association of prevention of Kutani Yoshiro "history building what you learn "at that time" (middle evil new book-proof) of an accident and the disaster" center work-related accident 2008
- Morikita Shuppan 2005 ISBN 978-4,627,664,715 that Masayuki Nakao "predicts future failure from a cause of failure 100 selections 41"
- Case, crime meeting for the study Kaoru Murano "Meiji, Taisho era, Showa, Heisei case, crime size encyclopedia" Tokyo method study of Confucianism House publication, 2002. ISBN 4-8089-4003-5。
Allied item
- A bridge girder fall accident occurs in construction section of Kita-ku, Kobe-shi on new Meishin Expressway Arima River Bridge bridge girder fall accident - April 22, 2016. One of the 120 meter-long bridge girder dropped on National highway No. 176, and ten people were killed or injured.
Outside link
- Bridge girder fall - failure knowledge database of the Hiroshima new transportation system
Coordinate: 34°28'N 32.4 seconds 132°26'E 38.3 seconds / 34.475667 degrees N 132.443972 degrees E
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