Before construction can begin on a site, it must first be prepared by a knowledgeable crew. For many projects, this includes extensive excavation services that establish the following:
- Soil and subgrade quality
- An effective grade for drainage
- Additional drainage structures
- A cleared site free of any obstructions
- Underground pathways/trenches for utility lines
- Stable sites for foundation installation
Effective excavation services improve construction efficiency, help with equipment/material staging, reduce safety and rework risks, and ensure the project is done on time and on budget.
Why are Excavation Services Important for Preparing a Houston Construction Site?
Excavation is a critical part of the construction process for several reasons and is part of several site preparation processes. They include:
- Improving soil and subgrade quality – Unstable subgrades are a major concern in Houston, as clay rich and sandy soils are common. Clay rich soils expand when exposed to rain and contract when they dry out. Sandy soils are unreliable load bearers. Both can place intense mechanical stresses on building foundations if they are not stabilized.
Excavation services can be used to remove these unstable soils through cutting and replace them with a higher quality fill. Excavators can be used to compact the subgrade, though typically in a secondary role.
- Ensuring efficient site access – One of the first stages in construction is establishing access to and around the site. Efficient site access is essential for maneuvering heavy equipment and staging materials, so it is critical for keeping the project on time.
Site access includes clearing out any entrances to the construction site, rough grading access routes, stabilizing those access routes and, if necessary, installing temporary roads for equipment. Excavators can assist with every part of this process.
- Establishing a grade that promotes drainage – Efficient drainage is non-negotiable for Houston construction sites. City ordinances demand every residential and commercial site meet standards for drainage capacity. Further, efficient drainage is essential for protecting structures and preventing water related damage to foundations and pavement. The foundation for efficient drainage is establishing a grade that directs runoff to the property’s drainage structures. Although the final grading passes will be done with specialized machinery designed for the task, the initial rough grading is handled by excavators.
- Building out critical drainage structures – In addition to grading, excavators are also heavily utilized when creating additional drainage structures. This includes channel and trench drains, retention/detention ponds, underground catch basins and swales, among others. Most of these structures can only be placed after soils are cut and shaped onsite, and this is what excavators do best. Excavators are also used to establish grades and erosion protection for retention/detention ponds, which are extremely common in Houston.
- Clearing the site of any obstructions – Site clearing is another early and critical process for Houston construction sites. Extensive site work cannot begin until the site is cleared, and this involves removing trees, tree stumps, vegetation, rocks, old utility lines and any dilapidated structures. Excavators are needed for most of the job, whether it is to grub out stubborn vegetation, pull down mature trees or demolish old structures.
- Trenching out utility lines – Once the site is cleared and stabilized, excavators are needed to trench out any utility channels and ensure there is adequate clearance. This is necessary for water and gas lines, electrical conduits, storm sewers and telecommunication/data lines. Excavators are ideal for this process because they can be used to make cuts that are precise in shape and depth.
- Creating stable sites for pad and foundation construction – In Houston, the most common way to install a foundation is with the slab-on-grade process. Slab-on-grade involves installing the concrete foundation directly over a prepared subgrade, though for larger commercial buildings (warehouses, distribution centers, large retail centers, etc.), additional reinforcement may be necessary. For example, drilled pier systems can provide additional stability. Before a slab-on-grade foundation can be installed, the subgrade must first be prepared and compacted. Excavators are used to remove any unstable soils and replace it with structural fill. They help with pad grading and can be used to correct drainage issues.
A Proven Site Developer Can Provide Reliable Excavation Services
Excavation is a foundational part of every Houston construction project, from single family homes to sprawling commercial or corporate campuses. There is no skipping it.
A reputable site developer can provide excavation services as part of the dirt work, prior to construction. An experienced contractor has better access to excavation equipment, ensuring the project has the resources it needs. Experienced site prep contractors are also process experts that know how to utilize excavators to efficiently clear sites, stabilize soils, establish site access and help with drainage construction.
Any business beginning a development project will need excavation services to prepare for vertical construction, stabilize the site and establish proper drainage. A trusted site developer and pavement contractor can make that happen.
