During construction or excavation, preventing erosion is important for the environment and the construction site. Sediment from eroded soils pollutes lakes, rivers and wetlands and can clog sewers.
The simplest way to prevent erosion on a construction site is to minimise soil disturbance. If soil disturbance is required, it should be done in a way that meets strict design standards. Planting, mulching, and heavy equipment can help reduce the risk of soil erosion.
All drainage channels should be regularly inspected for sediment deposition. Any sediment that reaches private roads must be removed by street cleaning and transported to a controlled sediment disposal site.
Sediment control measures need to be installed before excavation begins. These measures include soil nails, riprap, rock armouring, turbidity barriers, and erosion control blankets. The size of these measures should be determined based on the severity of the site and its anticipated weather conditions.
Erosion control measures should be implemented at all construction sites. Ideally, the site should have gravelled access roads to prevent sediment from being tracked onto private roads. During excavation, tree root removal should be delayed until the last possible moment. Planting activities should be monitored to ensure vegetation stabilises the soil slopes.
Stormwater runoff is a critical aspect of erosion control. All drainage channels should be inspected for damage caused by construction vehicles. Up-slope stormwater runoff should be diverted around unstable slopes. Larger storms can wash away sediment and turbid runoff.
Erosion and sediment control measures should be implemented and maintained to prevent sediment from reaching private and public roads. All drainage channels should be diverted around soil disturbances. During excavation, seeding the excavation site is an effective way to control erosion. Plants can loosen by wind and livestock and be re-firmed.
Erosion control measures should be designed to address all forms of sediment. Turbid runoff is the most common form of environmental harm related to construction projects. It can contaminate aquatic ecosystems, lakes and rivers and endanger users.
Erosion and sediment control measures are not effective in all situations. Every construction site has unique circumstances. The solution may require creative approaches or a combination of methods.
Choosing the best type of excavation for your project will ensure you get the most bang for your buck. Some excavations may be done in weeks, while others may take years. The key is to choose a contractor who can do the job and make a reasonable estimate on a bid. The best part about the bidding process is that it should result in a win-win situation for both the Contractor and the Owner. In short, it is a matter of defining the project scope and objectives and then matching the appropriate Contractor to the project.
Unclassified excavation is a subset of the larger scheme and is generally defined as the extraction of earth, rock, or other suitable materials to install a new or replace a current structure. The most common occurrence is removing a section of earth from an existing structure, often used in constructing highways, roadways, and parking lots. The more active type of excavation involves drilling, jackhammering, and other high-pressure methods to extract the soil. During the excavation, a trench is created around the pit to hold the soil, which may be removed from the site as the job progresses.
A good example of an unclassified excavation is the removal of existing HMA pavement. Other accoutrements may accompany unclassified excavation, such as surveying and permitting offsite facilities. Aside from the usual suspects, an unclassified excavation may involve removing stones and dirt to make room for new pavement. This type of excavation is commonly used to make room for a new highway or roadway but also to resurface an existing roadway. Depending on the size and complexity of the job, this type of excavation can take several months to several years to complete. The standard equipment may include a bulldozer, skid steer, backhoe, and track tractor, with various attachments to suit the job. Using a track-type tractor is the best option, as the tractor has a wide track, which can handle the varying soil types on-site.
Excavation is a big part of any building project. If you're planning a major construction project, having a reliable partner is important to help you with the excavation process. You'll need to have a firm that can guarantee the quality of their work and one that can work within your schedule and budget. Contact us today at 02 4202 6381 to get started!
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