Compaction Grouting

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Straight Line Construction has successfully performed compaction grouting on hundreds of projects throughout Colorado, New Mexico, Arizona, and Wyoming.

Compaction grouting is a ground improvement technique that involves injecting a stiff, low mobility (low slump) soil/cement grout into the ground surface under high pressure. Compaction grouting is typically done using man-portable equipment, but can also utilize larger drilling equipment in commercial applications.
Compaction grouting is usually performed in a bottom-up manner with grout injection beginning at the bottom of the hole. Grout tubes are drilled or driven to the planned treatment depth and grout is injected until one of three cut-off criteria are reached; the volume of grout placed exceeds the specified amount, the specified maximum injection pressure is reached, or undesirable ground or structure movement occurs. The grout tubes are then withdrawn in one-foot increments and grout is again placed until one of the cutoff criteria is reached. This process is repeated until the top of the treatment zone is reached.
The compaction grouting process results in a column of grout bulbs extending from the bottom of the treatment zone to the top. The resulting grout columns allow transfer of load from foundations to deeper bearing stratum. The grouting process also results in densification and increased bearing capacity of the surrounding soils within the treatment zone due to lateral displacement caused by the grout injection. Compaction grouting injection points are generally laid out on a grid pattern and may include primary, secondary, and tertiary treatment points to help provide confinement and increase the amount of ground improvement.
Compaction grouting can be used to improve ground conditions prior to construction but is more commonly used for remedial repairs to help stabilize or raise existing foundations and slabs. The relatively high injection pressures used during compaction grouting often allow significant vertical recovery of foundations and slabs that have experienced settlement and also reduce the risk of future settlement.
Some of the advantages of compaction grouting include:
  • No drill spoils are created, which can be beneficial where there may be environmental concerns with the subsoils.
  • Compaction grouting is relatively economical.
Compaction grouting can be utilized in a variety of applications including:
  • For new construction and remedial repairs.
  • To raise foundations and floor slab that have settled.
  • To fill large voids and fissures.
  • In conjunction with mud jacking to fill small void spaces beneath slabs after stabilization.

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Straight Line Construction

Straight Line Construction has changed a great deal over the last 30+ years in the industry, but one thing remains the same: our commitment to quality and to designing and installing permanent solutions to foundation settlement issues. Beginning with small residential jobs more than 30 years ago when the family-owned company was founded by Tim Davis, Sr., Straight Line Construction today repairs cracking residential and commercial foundations through its Ram Jack product toolkit and designs solutions for large infrastructure and industrial projects. We specialize in matching the right solution to each type of foundation repair issue.

Are you building a new home and want to ensure it has a solid foundation? Or is your house experiencing unwanted sagging or a cracking foundation? Are your walls cracked or your doors and windows sticking? As a bonded, licensed, and fully insured foundation repair company, we are proud to serve Colorado homeowners, builders, and commercial contractors. Our technical certifications enable us to offer the highest quality services and the best American-made, environmentally safe products available for foundation repair. Regardless of how your building is shifting or sinking, we can help you stop it. Our 30 years in the business and our designation as a Ram Jack certified dealer means you get the most technologically savvy solution to fix your foundation.

From the factory to the field, we strive to ensure the quality of our products and workmanship meet the highest industry standards. We work with other vetted professionals in the industry. All of our helical piers, push piers, and mounting brackets are manufactured by Ram Jack in Ada, OK, at an ISO-certified facility with American-made steel. Williams Form Engineering in Golden, CO, manufactures our reinforcing bar for ground anchor systems and shares our commitment to quality control and quality assurance.

About Ram Jack

Ram Jack is a family-owned business that began operations in 1968, in Ada, OK, where we currently source our piers and brackets. Back then, concrete piering was the original repair method used simply because it was the only technology available at the time. Over time, it became evident that concrete piers did not provide long-term stabilization of foundations and only provided a short-term warranty period. To guarantee the highest grade of customer satisfaction, a greater solution needed to be found.

The Ram Jack owners embarked on a research program to develop a foundation repair system to stand the test of time. The U.S. Patent and Trademark Office first issued a patent to Ram Jack for its foundation repair system in 1985. Over the next few years, additional refinements and patents have followed, resulting in the strongest patented system in the industry. Ram Jack driven pilings are ICC-ES recognized (International Construction Code—Evaluation Services). Ram Jack is one of only two ICC-ES recognized foundation repair companies in the industry. Ram Jack’s products meet or exceed code requirements set down by ICC-ES for both commercial and residential properties.

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