Since 1930, Willy Stäubli Ing. AG has employed professional divers who are deployed on our construction sites. Diving work in confined spaces, at great depths and in poor visibility should not be underestimated. Our divers have earned a reputation for carrying out delicate and dangerous work with the utmost care and caution.
Our diving services include, among other things
- Diving examinations
- Controls
- Video and photo recordings
- Surveys
- Salvages
- Assembly work
- Burning
- Welding
- Drilling
- Blasting
- Formwork and concrete work
- Piling work
Safety is very important, especially when diving, which is why we pay attention to many different points:
- SUVA check
- Briefing
- Debriefing
- permanent diving assistant
- Observe the dive times
- Breathing gases (own Nitrox system)
- Dive computer etc.
Our divers have a proven diving qualification and technical training in locksmithing, construction or construction-related trades.
Compilation of the most important articles: SR 832.311.12 "Ordinance on the Safety of Workers Working at Overpressure"
Art. 2 Definitions
For the purposes of this Ordinance: a. Compressed air: breathing air or breathing gas with a working pressure of more than 0.1 bar; b. Breathing air: air from the atmosphere or a technically produced gas mixture whose composition corresponds to atmospheric air; c. Breathing gas: gas mixture that is more suitable than atmospheric air for medical reasons; g. Treatment chamber: room in which persons can be medically treated by changing the working pressure; h. Decompression: procedure for an orderly desaturation of the body from nitrogen, starting from the existing saturation at working pressure to a harmless residual saturation at atmospheric pressure; i. Holding stage: interruption of decompression at a pressure justified for occupational medical reasons. The human body is not designed by evolution to remain at overpressure. For this reason, various technical aids are needed to ensure survival in this environment, which is hostile to our lives. Various aids such as special equipment, different breathing gases, thermoregulation systems and mathematical diving tables are used.
The following approximate correlations can be assumed for compressed air diving in our lakes (approx. 400 m above sea level):
| Basic time (min) | Depth (m) | Decompression time (min) |
|---|---|---|
| 10 | 10 | 0 |
| 30 | 10 | 0 |
| 60 | 10 | 0 |
| 10 | 20 | 1 |
| 30 | 20 | 3 |
| 60 | 20 | 18 |
| 10 | 40 | 5 |
| 20 | 40 | 19 |
| 30 | 40 | 47 |
The times given are in no way binding and only serve as a rough guide. Each dive must be planned and carried out individually. In addition, the strain on the human body can be further reduced by using technical breathing gases.
Deeper dives are not permitted with compressed air in accordance with SUVA and associations.
The decompression time is the time the human body needs to survive a dive without damage. The diver must consistently wait for this time at calculated depths in order to ascend to the surface. If the decompression time cannot be maintained, the diver's health will be impaired without further measures, which can lead to paralysis or death.
Art. 21 Treatment chamber
1. a treatment chamber must be available and operational on site in the following situations:
a. for construction work in compressed air: if the working pressure is greater than or equal to 0.7 bar;
b. for diving work: if decompression of more than 15 minutes is required due to the planned exposure times.
2. the treatment chamber must be suitable for the medical care of persons who fall ill or have an accident while working in overpressure.
3. the number and capacity of the treatment chambers must be adapted to the number of people expected at the workplace.
4. the location of the treatment chamber must be selected in such a way that it can be reached from the workstations in the overpressure in a short time.
The decompression time reaches more than 15 minutes after just 30 minutes of diving with compressed air at a depth of 30 meters. According to Article 21, the installation of a treatment chamber (decompression chamber) is mandatory on the construction site in such cases. In addition, the maximum diving time including descent and ascent must not exceed three hours in accordance with the regulations.
We have our own chamber and install it on the supply pontoon for technically demanding construction sites. Treatment in the decompression chamber may only be carried out by a qualified diving doctor. For this purpose, rescue plans are drawn up with on-call diving doctors, ambulances and helicopters.
Our decompression chamber is also used with the wet diving bell (Wetbell).
