Commercial Diving Services offer both underwater and under bridge inspections and maintenance with our specialised equipment designed for these type of structures. We provide inspection and maintenance of the above and underwater elements to bridges such as pylons, pillars, piles, piers, abutments and culverts. This is a vital part of the asset maintenance required by government agencies and private companies.
We carry out extensive bridge inspections and maintenance works for NSW Rail Corp, Road and Maritime Services NSW (RMS), Sydney Harbour Authority, regional councils as well as large engineering firms such as GHD and SMEC.
Our professional team provide a comprehensive report to clients and/or engineers for their assessment and records which includes a condition report and any photos and videos recorded.
Under Bridge Inspections and Maintenance
We have portable and boat mounted floating elevated work platforms capable reaching various under bridge structures. These elevated platforms are certified and provide safe access to the underside and outer sides of bridges (or any structure over or on the water). The lift systems can be controlled from either the base or bucket as desired. Our floating work platforms are also available for hire.
Underwater Bridge Services
Some examples of underwater preventative maintenance that we regularly conduct include:
- Corrosion protection (CP) systems
- High pressure water blasting to clean marine growth from structures
- Installation and maintenance of corrosion protection bands
- Installation of cathode protection systems (CPS)
- Core sampling and crack stop drilling
- Pile inspections, repairs and wrapping
- Soffit inspections and repairs
- Fender replacements
- Concrete repairs
Bridge Non Destructive Testing
NDT is used to analyse and evaluate the integrity of piles, piers and underwater structures. Through the NDT method of testing there is no permanent alteration or damage done to the structure. We commonly are requested to test metal thickness’s and crack propagation. These tasks are achieved using MPI and ultrasonic double echo metal thickness digital gauging. In certain circumstances NDT can also be carried out using our ROV systems.
Core Drilling and Samples
We can execute a variety of core drilling techniques providing core samples typically to assist large corporations and government departments to investigate the structural integrity of marine assets. Core sampling can often be requested by the client or engineers before or after assessment of a condition report on the asset.
Based upon the clients or engineers instruction to us we will carry out their request with the core drilling size and location, in either concrete or metal. The core will be supplied to the client for their further analysis which may lead to subsequent coring requirements. It is normal that after each core is taken the void created by the core is filled with an appropriate product such as rapid set epoxy or equivalent as specified by the client.
Bottom Sampling and Surveys
We also do bottom sampling and surveys of river beds, upstream and downstream of bridge structures and below to determine if river bed scouring is present. Debris build up against bridge piers and pylons also needs to be identified for its potential removal.