Our portfolio of concrete repair methods offers several effective choices that can reduce cost and ensure a quality repair. We have experience performing pier repairs whether or not they are dewatered. Our divers can perform underwater concrete repairs using several different methods. We can also install cofferdams and dewater the entire structure so that crews can access the bridge pier in the dry.
Our crews can also repair submerged or dry abutments. Since our founding our crews have been repairing masonry, concrete, and timber bridge supports.
Typical methods used by Brennan include the following.
Underwater Concrete Repairs
- Often, it is thought that a successful concrete repair must be done in the dry; however, this is not always the case. Brennan can present several methods of underwater concrete placement that best fit each project. – Learn More
Preplaced Aggregate Concrete (PAC)
- This process blends the traditional placement methods with pressurized grouting techniques. Several advantages include high bondability, low shrinkage, reduced cracking, and increased strength. – Learn More
- Pressure grouting is an integral part of Brennan’s geotechnical services. We often pressure grout to consolidate masonry bridge piers and increase strength lost to degradation. This can be done both above and below the water on several types of structures to restore integrity. Pressure grouting increases the bearing capacity, consolidates structure interiors, and arrests water infiltration.
- Formed concrete is the most common type of concrete work done at Brennan. We have the expertise and ability to design and install custom formwork for any application. Whether it is a critical pour or a small patch job, we can safely and efficiently carry out placement in several types of weather conditions.
Concrete Pile Jackets
- Bridge and dock piling tend to be susceptible to degradation caused by scour, ice flows, and time. Total replacement of the piling can be avoided by using a repair method that uses concrete pile jackets to restore the piling to its original strength. – Learn More
- While repairing the abutment, Brennan can provide and install a jump span to keep railroad traffic operational during the repair. We have experience in driving piling and placing concrete while the bridge remains open to train traffic.