Cased Micropiles in Travis County

Cased Micropiles in Travis County

Rural and hillside sites across Travis County's unincorporated Hill Country share a problem that ordinary drilled piers struggle with: unstable ground near the surface, whether a karst void or loose colluvium on a steep slope, that a borehole needs to pass through cleanly before reaching bedrock. GeoStabilization International installs cased micropiles throughout Travis County for exactly this kind of site.

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Large diameter cased micropile drilling operation

What Are Cased Micropiles?

Cased micropiles are small-diameter, high-capacity deep foundation elements installed with a steel casing that stays in place through unstable or caving soil, allowing the pile to bore cleanly through the problem zone and found in competent bedrock below. The casing means installation doesn't rely on the soil around the hole to stay open on its own, which matters where that soil includes a karst void, colluvium, or debris.

Across Travis County, cased micropiles solve two distinct problems: karst-affected sites in the western Hill Country where a borehole might otherwise cross an unmapped void, and remote or steep-lot sites where limited access rules out larger drilling equipment. GSI's Travis County cased micropile work typically includes:

  • Casing through karst voids in Hill Country sites to reach competent Edwards Limestone bedrock
  • Installing foundation support on remote or steep-access rural lots
  • Underpinning additions where soil conditions rule out conventional spread footings
  • Supporting structures on undocumented fill without disturbing neighboring foundations
  • Providing deep foundation support where low-headroom or interior access limits equipment size
  • Reaching stable bearing capacity beneath structures affected by nearby karst dissolution
  • Installing piles suited to both compression and uplift loading on constrained sites

Geohazard Mitigation in Texas

Our Cased Micropiles Process

Every Travis County site brings its own ground conditions, so we verify them before committing to a design.

Step 1

Comprehensive Site Assessment

We drill test borings to confirm subsurface conditions, including any karst voids or fill layers the casing needs to pass through.

Step 2

Licensed Engineering Design

Our PE-licensed engineers size the micropile casing, diameter, and depth to the confirmed load and ground conditions.

Step 3

Professional Installation

Crews drill and case each micropile through the unstable zone, then grout and load-test it to confirm capacity.

Step 4

Ongoing Monitoring & Support

We verify pile performance after installation and remain available for follow-up inspection.

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Common Questions About Cased Micropiles

Most projects run 1 to 3 weeks depending on the number of piles and the depth needed to reach competent bedrock.

Cost depends on pile count, depth, casing length through unstable soil, and access conditions, which our engineers confirm from test borings.

Yes. Every design is stamped by a licensed Professional Engineer and meets IBC and Texas Building Code requirements.

GSI offers 24/7 emergency response and can mobilize a crew within hours if a foundation needs immediate deep support.

A cased micropile can bore through an unstable zone, like a karst void or loose colluvium, that would otherwise cause a conventional pier's borehole to collapse before concrete placement.

Yes. Compact drilling equipment and the casing system make cased micropiles well suited to limited-access rural and hillside sites.

Cased micropile installation is a comparatively low-vibration method, which is one reason it's often specified near existing structures.

We confirm depth to competent Edwards Limestone with test borings before finalizing the pile design, rather than assuming a standard depth.

Unstable Ground Doesn't Have to Rule Out Deep Foundations

Get Your Free Assessment Today

A karst void or loose colluvium under a Travis County site doesn't have to stop a deep foundation from reaching bedrock. Call (855) 599-5217 to get a Travis County cased micropile assessment from a licensed engineer.

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