Deep Cement Mixing
Deep cement mixing improves weak, wet, or variable soils in place to support foundations, excavations, cutoff systems, and bottom seals.
Pacific plans the work around treatment geometry, mixing depth, binder delivery, working platform, spoils, production controls, and verification. The objective is improved ground that can be built and checked against the design criteria.
How Deep Cement Mixing Works
Deep cement mixing is used when the project needs improved ground below the work area. A drill rig advances mixing tooling into the target soil and blends binder into the ground to form soil-cement elements or treatment zones.
The method can support settlement control, excavation stability, cutoff work, mass stabilization, bottom seals, and foundation support when the soil profile and design criteria fit. Pacific reviews DCM around the actual construction problem: what needs to be improved, where it sits, how it will be accessed, and how the finished ground will be verified.
When to Use Deep Cement Mixing
Deep cement mixing makes sense when the design requires in-place soil treatment and the site can support the rigs, tooling, binder plant, spoil handling, and testing plan.
Weak Soil Support
DCM can improve soft or loose soils where added strength or stiffness is needed below a structure, slab, excavation, or working area.
Settlement Control
Soil-cement treatment can reduce movement where the design requires more predictable ground response under new loads.
Cutoff And Seals
Overlapping soil-cement elements can support cutoff walls, bottom seals, and water-control scopes when the geometry and acceptance criteria are clearly defined.
Mass Stabilization
Larger treatment zones can be used where isolated piles are not the right answer and the design calls for improved ground across a broader area.
Excavation Support
DCM can help stabilize ground around excavations when treatment layout, sequencing, groundwater, and adjacent structures are coordinated early.
Limited Export Goals
Because treatment happens in place, DCM can reduce the need for full-depth removal and replacement where disposal, access, or groundwater make excavation less practical.
Equipment and Tooling
Pacific Foundation uses large vertical drill rigs and binder delivery equipment selected around the treatment layout, depth, access, and production plan. Final equipment depends on the design, ground conditions, platform, tooling, and verification requirements.
Bauer BG 40 V
The Bauer BG 40 V is a large vertical drill rig built for deep and large-diameter foundation drilling.
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Bauer BG 33 H
Heavy vertical drill rig used for CFA tooling, drilled foundation work, and production pile installation where pile size, access, and sequencing need coordinated field control.
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Bauer BG 24 H
The Bauer BG 24 H is a mid-size H-kinematics vertical drill rig for drilled foundation and shoring work.
View equipmentFinal equipment selection depends on treatment geometry, depth, access, ground conditions, platform capacity, binder system, tooling, production requirements, and verification plan. Binder storage, batching, grout mixing, pumping, hose routing, and production records remain part of the installation plan.
Project Experience
These projects show how treatment geometry, water control, access, and verification shape deep mixing work.
Honolulu, HI / Water & Wastewater Sand Island WWTP
Pacific Foundation supported the Sand Island Wastewater Treatment Plant work with CFA piles and a value-engineered design-build CDSM system for the IPS excavation, utility trenches, and tower-crane foundations.
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Manzanita, OR / Public Works Manzanita City Hall
Pacific Foundation installed 4-foot CDSM columns as part of the early foundation package for Manzanita’s new city hall campus.
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Honolulu, HI / Commercial HKV Ka Haku Tower
Pacific Foundation supported Hilton Kings Village / Ka Haku Tower with design-build CDSM, jet-grout bottom-seal work, a design-build secant pile wall, and a 120-foot CFA test pile with O-Cell testing.
View projectPacific Capabilities
Pacific coordinates the rig, binder plant, working platform, spoils, production records, and testing around the treatment design. That field control gives contractors a clearer path from layout to accepted ground.
Deep Cement Mixing FAQs
What does DCM do?
Deep cement mixing blends cementitious binder into native soil to form soil-cement elements or treatment zones. The improved ground can support settlement control, stabilization, cutoff, bottom seal, excavation, or foundation objectives when the design fits the site.
When is DCM useful?
DCM is useful when the project needs to improve weak, wet, loose, or variable soils in place and the site can support the required rig, tooling, binder plant, platform, spoil handling, and verification plan.
What controls the plan?
The main controls are soil profile, treatment geometry, target depth, binder design, mixing tooling, overlap, production sequence, working platform, groundwater, spoils, sampling, testing, and acceptance criteria.
What should we send?
Send the geotechnical report, treatment layout, target depths, performance criteria, excavation or foundation plans, access constraints, platform assumptions, groundwater information, binder requirements, and testing criteria.
Is DCM always better?
No. DCM is a strong option when the ground, design, access, and verification plan fit the method. Some sites are better suited for rigid inclusions, jet grouting, displacement piles, drilled shafts, or excavation and replacement.
Discuss Your Deep Mixing Scope
Send the treatment layout, geotechnical report, performance criteria, site access plan, and verification requirements. Pacific will review whether deep cement mixing fits the soil, sequence, equipment, and construction constraints.