Demolition of a bridge crossing German motorway A3
In the last two or three years, all six bridges crossing the German motorway A3 between the junctions “Goldbach” and “Hösbach”, were torn down and replaced by new structures. This was done to give space to a third lane in both directions of the motorway.
The last of the old bridges to fall was the one at the “Bahnhofstraße” at Goldbach, due in the night between 5th and 6th of May, 2001. For that purpose, the A3 was shut down completely between Saturday 6:00 PM and Sunday 6:00 AM.
Beuschlein of Würzburg, Germany, used heavy equipment for this job: a O&K RH8, a new Komatsu PC340LC and a Komatsu PC400LC, all three equipped with concrete cutters (most likely all made by Verachtert).
Additionally a JCB JS 330 XD with a Krupp demolition hammer and two Komatsu PC210LC equipped with hammers too. For “non-demolition-duties”, an older Komatsu PC320LC, a O&K MH6 a Komatsu wheel loader WA420 a tracked loader from Liebherr as well as a Caterpillar motor grader stood by.
Here are pictures from the job:
Before 6:15 PM: Preparations
![Prior to the demolition [Foto]](/de/berichte/A3/1.gif) |
![The protective mat [Foto]](/de/berichte/A3/2.gif) |
![First truckloads of sand [Foto]](/de/berichte/A3/3.gif) |
5:30 PM: Traffic is still running and only few onlookers are present. |
Right on time, at 6:00 PM, the lanes leading to Frankfurt are closed. To protect the pavement from debris, a thick layer of sand is used. But first, a protective mat is laid out. |
The first truckloads of sand are delivered. |
![A fleet of trucks bringing the sand [Foto]](/de/berichte/A3/4.gif) |
![New Mercedes Actros [Foto]](/de/berichte/A3/5.gif) |
![All lanes are closed [Foto]](/de/berichte/A3/6.gif) |
The sand is delivered by a whole fleet of trucks. |
Among them was a like-new Mercedes Actros. |
In the meantime, the lanes leading to Würzburg are closed, too and many sightseers have arrived. |
![carefull manuevering of trucks [Foto]](/de/berichte/A3/7.gif) |
Close to the bridge, carefull handling of the trucks is needed. |
![Demolition equipment in stand-by [Foto]](/de/berichte/A3/8.gif) |
The demolition equipment had been parked on the median days in advance. |
6:15 PM to 7:00 PM: The demolition commences
The supporting elements of the bridge consisted of three longitudinal binding girders. Between the pillars and at some more points, the girders were connected with cross beams. On top of this lay the road-tray, while the pedestrian’s walks stood laterally.
![Advancing excavators [Foto]](/de/berichte/A3/9.gif) |
![The pedestrian's walks are removed [Foto]](/de/berichte/A3/10.gif) |
![All six demolition machines [Foto]](/de/berichte/A3/11.gif) |
The excavators are coming … |
While the walkways are torn down by concrete cutters, the first hammer is attacking a girder.. |
Meanwhile, all six demolition excavators are working. |
![Massive reinforcement [Foto]](/de/berichte/A3/12.gif) |
![Like dinosaurs [Foto]](/de/berichte/A3/13.gif) |
![Traffic jam on the by-pass [Foto]](/de/berichte/A3/14.gif) |
The massive concrete reinforcement of the girders. |
The machines work their way through thy bridge like dinaurs made from steel. |
What drivers saw: traffic jam on the by-pass. |
7:00 PM to 9:15 PM: The work continues during nightfall
![Working on the girder [Foto]](/de/berichte/A3/15.gif) |
![The first girder is gone [Foto]](/de/berichte/A3/16.gif) |
![Onlookers on the motorway [Foto]](/de/berichte/A3/17.gif) |
At girders, first the concrete is removed with the help of hammers then the reeinforcements are cut by shears. |
The first girder is gone, the second is being worked on. |
Sightseers are now walking around on the motorway itself. |
![O&K RH8 [Foto]](/de/berichte/A3/18.gif) |
![Two Komatsu PC210LC [Foto]](/de/berichte/A3/19.gif) |
![Reinforcements [Foto]](/de/berichte/A3/20.gif) |
The RH8 working on th southern bridge head. |
Both of the Komatsus PC210LC working together. |
The concrete reinforcements of the middle girder. |
![JCB at work [Foto]](/de/berichte/A3/21.gif) |
![The first pillar is falling [Foto]](/de/berichte/A3/22.gif) |
|
The JCB excavator at work. Many chunks of concrete are still hanging from the reinforcements. |
The first pillar on the northern side is falling. |
|
After 9:15 PM
![The last girder [Foto]](/de/berichte/A3/23.gif) |
![The last girder [Foto]](/de/berichte/A3/24.gif) |
![Concrete cutter [Foto]](/de/berichte/A3/25.gif) |
Around quarter to ten, the last girder falls. First, near the norther bridge heade … |
…and shortly afterwards everywhere. |
Once again one of the big concrete cutters. In the background, you can see a motorway white with dust. |
![Crushing debris [Foto]](/de/berichte/A3/26.gif) |
![Clearing debris [Foto]](/de/berichte/A3/27.gif) |
![Clean motorway [Foto]](/de/berichte/A3/28.gif) |
Around 11:00 PM, the remaining debris is crushed further still … |
… and removed. |
The debris is and the layer of sand is removed completly. The fire brigade has cleaned the lanes with water and the road maintenance staff has installed guard rails. |