![]() One header is the high-pressure supply line and the other a low-pressure discharge line. Wells are installed and connected to two parallel headers. This method is designed to pump large amounts of groundwater, which creates a broad cone of influence. Deep Well Systemsĭeep well dewatering systems lower groundwater using a series of drilled wells, each fitted with an electric submersible pump. Wellpoints are normally utilized for shallow sites due to the maximum lift of about 18' (based on site elevation and system efficiency). The header system is then connected to a vacuum pump that draws the water through the wellpoint, to the header system and then to a discharge point. How do we dewater a site? Wellpoint SystemsĬonsists of a series of wellpoints that connect to a common header pipe. Proper dewatering prevents groundwater from affecting the jobsite and keeps the project on the proper timeline.ĭownload our project checklist to ensure you don’t miss a step when gathering important information and planning dewatering activities. Additionally, water pressure from under the excavation floor may cause sand boils or the upheaval of the soil. This may cause the walls of a pit or slope to fail, leading to safety hazards, schedule delays, equipment damage, and re-excavation. If you remove soil below the level of the groundwater at the site (static level), water may flow into your excavation. Groundwater exerts pressure on the surrounding soil. Proper removal of the groundwater before construction begins can eliminate excavation failures due to uncontrolled water. If the groundwater at the site is contaminated with chemicals from a dry cleaner or UST site, removing the water from the excavation reduces employee exposure to the toxins. Also, keeping the bottom of the excavation dry reduces the possibility of tripping and slipping hazards and can prevent equipment damage. People don’t like working with wet feet, this includes workers in building excavations, pipeline welders, and any other contractor working at the site. Dewatering may be temporary during construction activities or be a permanent fixture for the life of the facility. Groundwater is removed from the site using deep wells, well points, eductors, or conventional “sump and pump” methods. What is Construction Dewatering?ĭewatering is the process of removing groundwater or surface water from a construction site using dewatering systems and methods. In our first issue, we’re going to start with the basics. Every six weeks or so you will receive non-commercial information regarding dewatering system design, installation, and operations for construction, infrastructure, and coal ash dewatering projects along with water treatment solutions for removed groundwater. Welcome to the inaugural issue of the Griffin Dewatering newsletter that will focus on construction dewatering and groundwater management topics. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |