At CGL, we are experienced in providing temporary works solutions, including basement propping services, for which we use specialist software, ensuring the safe and sustainable delivery of projects.
Our Basement Propping Services
CGL provides a single source of geostructural guidance to optimise temporary works solutions in relation to the following:
- Piled Walls
- Basement Propping
- Berm Stability
Our engineers can also provide temporary works design using software including CADS A3D, Steel Work Member Design (SWMD), and AdSec to develop designs, including:
- Basement Propping Frames
- Capping Beams
- Thrust Blocks
Understanding what an optimum construction sequence is, is key to ground modelling and the sensitivity of numerical analysis.
Efficient Analysis and Modelling
CGL combined geotechnical, structural, and construction sequence engineering to deliver a fast-track deep London basement at 1-9 Seymour Street, London. The project featured challenging complexities and was delivered safely, sustainably, and within program and budget constraints. Our work was shortlisted by Ground Engineering magazine for a major project award.
The temporary works (TW) design uniquely blended skilful construction sequencing and engineering management with sophisticated geostructural analysis, and 2D and 3D modelling whilst combining realistic ground modelling and observational techniques.
The TW techniques used were designed efficiently using Finite Element modelling (FEM), which is more often in the domain of permanent works designers than the temporary works designer’s skill set. Examples include the novel use of PLAXIS 3D for the efficient design of reaction pile caps to limit the movement of party walls and two tower crane base foundations. These maximised the benefits of sophisticated soil structure interaction so often ignored in conventional temporary works design.
Alternatives to Conventional Basement Propping
CGL has used buttress piling as an alternative to conventional steel basement propping and thrust blocks on basement excavations up to 10m deep. The buttress pile approach enabled an accelerated construction program versus conventional basement propping systems by eliminating restricted working space within the excavation.
These buttress piles use the same piling system, and indeed largely the same piles as the main wall set either just in front or just behind the line of the retaining wall. The buttress piles are connected to the permanent piled wall by a capping beam to become a single continuum, which increases the overall flexural stiffness of the system and lowers the potential displacement characteristics.
Buttress piles for a basement can either be included in the permanent construction or demolished once the internal floors within the basement can provide effective propping. Where onsite space restrictions allow, the buttress piles can be installed on the active side of the wall and remain in place post-construction.
Why Choose CGL For Basement Propping Services?
CGL has a wealth of experience in relation to temporary works solutions including basement propping services. Our experienced and accredited team of engineers uses specialist software to ensure safe and sustainable project delivery.
We have a proven track record of dealing with complex projects and we continually explore and develop new innovative processes to accelerate construction schedules and maximise both our efficiency and that of our clients.
At CGL, we are industry-leading experts providing a comprehensive range of services in relation to basement propping, berm stability, capping beams, thrust blocks, and corbels.
Our experienced and accredited team of geotechnical and geoenvironmental specialists strive to ensure that all our clients receive an efficient and accurate service enabling them to proceed with their projects and meet their objectives in a timely manner.