Micro-piling is becoming a much more common groundwork solution when foundation depths exceed 8' to 10'. Micropiles are a most effective, practical and better for the environment. A much more cost effective and practical solution is to form a piled raft or piles with ground beams. With much less excavation or concrete required and less harm to the environment micro-piling is the best solution. Traditionally deep strip foundations require excessive excavation; there is a strong risk of trench collapse and excessive use of materials.
is able to offer you complete service from site clearing, foundation design by a structural engineer and permitting. Then we provide the management, skilled craftsmen and equipment required for a quality finished project.
The use of micropiles has grown significantly since their conception in the 1950s, and in particular since the mid-1980s.
Micropiles have been used mainly as elements for foundation support to resist static and seismic loading conditions and less frequently as in-situ reinforcements for slope and excavation stability. Many of these applications are suitable for transportation structures.
Implementation of micropile technology on U.S. transportation projects has been hindered by lack of practical design and construction guidelines. In response to this need, the FHWA sponsored the development of this Micropile Design and Construction Guidelines Implementation Manual. Funding and development of the manual has been a cooperative effort between FHWA, several U.S. micropile specialty contractors, and several State DOT's.
This manual is intended as a "practitioner-oriented" document containing sufficient information on micropile design, construction specifications, inspection and testing procedures, cost data, and contracting methods to facilitate and speed the implementation and cost effective use of micropiles on United States transportation projects
Chapter 1 provides a general definition and historic framework of micropiles. Chapter 2 describes the newly developed classifications of micropile type and application. Chapter 3 illustrates the use of micropiles for transportation applications. Chapter 4 discusses construction techniques and materials. Chapter 5 presents design methodologies for structural foundation support for both Service Load Design (SLD) and Load Factor Design (LFD). Chapter 6, which was supposed to present a design methodology for slope stabilization, is not included in this version. Chapter 7 describes micropile load testing. Chapter 8 reviews construction inspection and quality control procedures. Chapter 9 discusses contracting methods for micropile applications. Chapter 10 presents feasibility and cost data. Appendix A presents sample plans and specifications for Owner Controlled Design with Contractor Design Build of the micropiles, and/or micropiles and footings.