How does a soil nail wall work? Concept Soil nail walls are typically designed using a limit equilibrium analysis. Think of the sliding block experiment in high school physics lab where you may have calculated what force is required to overcome friction and move a sandpaper block along an incline. In a soil nail wall,…
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Congratulations to Alex Smith on becoming the new Managing Member at Subsurface Construction. Alex is a professional engineer, a partner at Subsurface, a volunteer in his community and our friend. We sat down with Alex to see what makes him tick. Briefly describe what you do all day. For the first 12 years at Subsurface,…
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What are the advantages of a soil nail wall? Speed and Cost Soil nail walls are installed more quickly and cost effectively than other shoring systems. Soldier pile walls or sheet pile walls require large equipment to drill in place or drive the piles or sheets. Soil nails avoid the time and cost of installing…
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With admiration, gratitude, and sadness we announce that Greg Sullivan will retire at the end of 2020. Greg has led Subsurface Construction as the Founder and Managing Member for 25 years. He has inspired us with care for people, servant leadership, engineering expertise and wisdom. Greg plans to spend time with family and friends in…
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Do you need a permanent or temporary soil nail wall? Here are the similarities and differences. Both Remain in PlaceBoth permanent and temporary soil nail walls remain in place. Temporary soil nails are backfilled against and abandoned in place. Permanent soil nail walls remain in place to serve as site retaining walls or to keep…
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Expressing genuine empathy is critical to being a successful leader, salesperson and coworker. Want to lose someone’s confidence? Show them you’re more focused on short term productivity, closing the deal or getting what you want in spite of their wants and needs – professionally or personally. Listen to understand , then respond. When in conversation,…
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Silica Enforcement in the Construction Industry We should consider the OSHA’s new silica law a good thing. The permissible exposure limit for silica has been cut from 250 ug/m3 to 50 ug/m3 – a five fold decrease. We depend on our crew members. The stakes are high. Silica causes silicosis – lung disease, kidney disease,…
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Considering Movement of Excavation Shoring Systems Are you shoring to limit excavation into a tree protection area? Are you shoring to excavate near an historic masonry church? Of course, we would all be more concerned about the shoring system chosen at the church, but which system? The first step is to choose the right system. …
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We would like to recognize our General Superintendent, Robert Jones, for serving as Field Supervisor for the Anchor and Micropile Installation School (AMPIS). ADSC annually puts on AMPIS to better the drilling skills of those in our industry. To learn more about ADSC’s training opportunities, visit ADSC-IAFD
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Common questions we ask ourselves when preparing a shoring bid: 1.Have we clearly communicated the scope of work included in our shoring bid proposal? 2.Will the ground water table cause trouble? 3.How deep is rock? 4.Open hole drilling or casing? 5.Are there reasons to expect drilling obstructions? 6.Can sloping be used to avoid utilities and/or reduce…
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