Hayward Baker Inc. is highly experienced in earth retention and is able to apply this experience to complex soil-structure interaction projects. Advantages of Hayward Baker Inc. earth retention include full design-build geotechnical services that are suitable for restricted access, rapid mobilization, fast excavation, cost-effective designs, and a full range of underpinning techniques.
Over the past forty years, earth retention systems, also known as earth support systems, have evolved from relatively simple methods of temporary shoring for excavation support to complex subterranean reinforcement for permanent stabilization of deep cuts and slopes. Better equipment, use of the latest geotechnical construction techniques, and innovative use of soil nailing and soil anchors allow cost-effective and safe support of excavations, as well as slope stability control. Crucial to the successful construction of these technologies is a thorough understanding of geotechnical engineering as well as the structural mechanics of the earth retention system itself.
Hayward Baker Inc. has experience with the comprehensive range of earth retention construction services. Structural retaining walls include soldier pile and lagging walls, sheet pile walls, secant pile walls, tangent pile walls, or structural diaphragm walls to resist lateral pressures from retained soil and adjacent structures, and prevent raveling. When a cantilever wall is insufficient to resist the lateral loading, incorporating ground anchors (tieback walls) or internal bracing (braced walls) provide additional lateral support. Braced excavations are often used when adjacent property owners or structures restrict the use of anchors. Secant walls or tangent walls constructed with drilled shafts (caissons) or augercast piles are well suited for use in urban environments where noise, space, and damage to adjacent structures are major concerns. As part of an earth retention system, micropile walls can be constructed with lagging in tight access and low headroom sites. Jet grouting, chemical grouting, and soil mixing construct a grouted soil wall by cementing in situ particles together on vibration-sensitive or tight access sites. A jet grouting or chemical grouting systems can be used to construct walls beneath existing foundations allowing excavations immediately adjacent to existing structures.
Soil nail walls provide temporary or permanent stabilization of cuts and failed retaining walls. Anchored reaction blocks are utilized for soil stabilization of a damaged or failing retaining wall. When excavations are planned near existing structures, Hayward Baker Inc. can employ underpinning techniques to provide foundation support for the adjacent structures. The innovative use of micropiles, often in combination with anchors, to construct walls has proven to be a valuable tool for increasing the factor of safety of landslide prone areas. Tunnel access shafts are often constructed with secant piles or tangent piles.
Working with owners and their geotechnical engineers, Hayward Baker Inc. can assist in selecting the most appropriate technique for the application and the soils.