Ground Improvement – Why Choose SUNZO?

In the construction industry, attention often centers on towering skyscrapers, massive bridges, and large-scale ports—while the invisible foundation beneath them, the ground, is easily overlooked. Without reliable ground treatment, even the grandest structures face potential hazards such as settlement or instability—leading to cracked walls or even tilting buildings. The world-famous Leaning Tower of Pisa is a classic example of unstable foundations. Though unseen, the foundation is the essential basis for the safety and stability of all above-ground structures.

Ground improvement refers to the engineering methods used to enhance or strengthen weak or poor soil layers through targeted techniques so that they meet the load-bearing, stability, and deformation requirements of a structure.

SUNZO Foundation Engineering Company specializes in ground improvement. As a comprehensive contractor integrating design and construction, SUNZO has been deeply engaged in the field for 26 years, becoming a leading enterprise in foundation engineering. With a professional management team, skilled construction crews, and advanced equipment, SUNZO holds 48 technical patents and has completed 300+ successful projects. Its end-to-end technical strength has made it a trusted partner for clients around the world.

Why Is Ground Improvement So Important?

Not every project site has solid natural ground. Many developments are located on reclaimed land, tidal flats, valleys, or filled ground—areas with inherently weak soils such as:

Soft soil (e.g., silt): Low strength, high compressibility, incapable of supporting heavy loads.
Organic soil: Contains humus that causes long-term settlement and instability.
Fill soil: Uneven composition and large voids lead to instability.
Sandy soil: Risk of liquefaction during earthquakes, resulting in sudden loss of bearing capacity.

Without proper ground treatment, projects face multiple risks—even total failure:

Excessive or uneven settlement: Cracked roads, collapsed plants, disrupted operations.
Differential settlement: Structural cracks or tilting buildings.
Liquefaction or sliding: Earthquake-induced ground failure leading to collapse or landslides.
Cost overruns: Emergency remediation can cost several times more than initial treatment.

Ground improvement addresses these risks by enhancing soil strength, controlling settlement, and reducing hazards—establishing the “underground safety line” for every project.

SUNZO’s Core Technology: Preloading Consolidation

Soft soil (like silt) has high water content and porosity, leading to very slow natural consolidation that may take years. SUNZO’s advanced preloading techniques shorten this process to less than six months.

1. PVD + Vacuum Preloading

Principle: A combination of “artificial drainage channels + vacuum suction” to accelerate water discharge and densify the soil.
Patented Technologies:

Vacuum Preloading without Sand Blanket (Patent No. 2007100312215)
Timed Drainage Channel Closure for Soft Ground (201710107951.2)
Water–Gas Separation Device for Vacuum Preloading (201510083730.7)
Water–Air Separation Vacuum Preloading System (201310481313.9)
Advantages: Greatly improves soft ground strength, shortens consolidation time, saves resources, and minimizes environmental impact.
Projects: Singapore Changi Airport, Tekong Island (Singapore), Formosa Steel Plant (Vietnam), Dhamra Port (India), University of Macau (Zhuhai), HKUST (Guangzhou), Prologis Logistics Parks, E-Shang Logistics Parks, Guangzhou Port Nansha, Yangjiang LNG Storage Facility, and more.

2. PVD + Surcharge Preloading

Principle: Uses “vertical drainage + surface loading” to expel pore water quickly.
Advantages:

Shortens consolidation period
Suitable for large areas
Cost-effective
Stable long-term performance
Projects: Faw Port (Iraq), Macau Zone A Reclamation, Hong Kong–Zhuhai–Macau Bridge, Yangjiang Port.

3. PVD + Water Loading Precompression

Principle: Replaces traditional earth/sand surcharge with water load pressure—achieving rapid consolidation with easier operation.
Advantages:

Low-cost, environmentally friendly
Uniform and controllable pressure
Fast, flexible, and clean post-use

SUNZO’s Grouting Methods

Grouting improves soil by injecting cementitious materials into voids or weak zones, bonding the soil to enhance bearing capacity, stability, or impermeability.

1. High-Pressure Jet Grouting

A “micro-surgery” technique—injecting slurry under high pressure to fracture and fill the soil, ideal for local reinforcement or defect repair.

2. Jet Grouted Columns

Combines jet grouting and pile formation, creating cylindrical soil–cement columns for seepage control or deep load-bearing.

3. Deep Mixing Method

Mixes cement slurry with in-situ soil via rotating blades to form composite soil-cement piles, suitable for large-scale soft ground or seepage barriers.

Method	Core Feature	Typical Use	Strengths
High-Pressure Jet	Local injection, precise filling	Repairs, void filling, waterproofing	Flexible, minimal disturbance
Jet Grouted Column	High-quality pile formation	Deep reinforcement, seepage control	High strength, deep application
Deep Mixing	Mechanical soil-cement mixing	Roadbeds, yards, large areas	Low cost, efficient, eco-friendly

SUNZO’s Replacement Methods

1. Replacement (Soil Exchange)

Directly excavates and replaces weak soil (≤3 m) with quality material—simple, low-cost, and fast.

2. Vibroflotation

Uses vibration and backfill to densify or replace soil, suitable for both soft and sandy layers.

3. Dynamic Compaction

Applies heavy tamping energy from falling weights to densify soil up to 10 m deep—ideal for loose or low-saturation soils.

4. Composite Pile Foundations (Sand, Gravel, CFG Piles)

Forms piles within soft soil to share load-bearing—suited for deep or high-strength requirements.

Method	Depth	Core Logic	Suitable Soil	Strengths
Replacement	≤3 m	Replace weak soil	Shallow silt, organic soil	Simple, low cost
Vibroflotation	3–6 m	Vibrate + fill	Soft/sandy soil	Fast, versatile
Dynamic Compaction	3–10 m	Impact densification	Loose sand, soft soil	Deep, low cost
Sand/Gravel Pile	5–15 m	Pile replacement	Deep soft soil	Moderate cost
CFG Pile	5–30 m	High-strength pile	Deep/high-load sites	High capacity, low settlement

Application Fields

Highway and railway foundations
Ports, airports, and station platforms
Hydraulic embankments and levees
Mining and environmental cutoff projects

SUNZO delivers cost-effective and durable solutions, building strong foundations for century-long infrastructure.

Representative Projects

Singapore Changi Airport – 20 m soft soil; completed consolidation within 12 months using PVD + vacuum preloading.
Formosa Steel Plant, Vietnam – Vacuum + dynamic compaction reduced schedule by 35%.
Hong Kong–Zhuhai–Macau Bridge – Ensured island foundation stability with patented vacuum preloading.
Guangzhou Huangpu Semiconductor Plant – Combined piles and dynamic compaction to ensure precision stability.
BW Industrial Park, Vietnam – Treated 270,000 m² of fill soil within six months via dynamic compaction.
Dhamra Port, India – PVD + vacuum preloading ensured safe harbor expansion.

FAQ

Q1: How long does vacuum preloading take?
A: Typically 3–6 months for medium-sized projects.

Q2: How much cheaper is it than deep foundations?
A: Usually saves 30–50% of cost and time.

Q3: How is quality assured?
A: Verified via CPT, SPT, and settlement monitoring.

Q4: Is it suitable for reclamation?
A: Yes, SUNZO has extensive experience in Singapore and Malaysia.

Q5: Can SUNZO handle overseas projects?
A: Yes—projects completed in Singapore, Vietnam, Malaysia, India, and the Middle East.

Industry Trends: Green, Smart, and Global

Future ground improvement integrates sustainability and intelligence:

Green Construction: Lower emissions, less waste, and reduced noise.
Smart Monitoring: Real-time settlement tracking via sensors and data platforms.
Global Cooperation: Expanding with the “Belt and Road” into Southeast Asia, the Middle East, and Africa.

SUNZO is leading breakthroughs in vacuum preloading optimization and intelligent monitoring, greatly shortening consolidation time and cutting energy use.

Why Choose SUNZO?

26+ years of expertise (founded 1999, 300+ projects).
48 patents, including 9 inventions.
Comprehensive equipment system: PVD installers, vacuum preloading sets, mixing rigs, jet grouting machines, dynamic compactors, vibroflot rigs, CFG pile machines, hydraulic hammers, and marine platforms.
Global presence: China, Singapore, Malaysia, Vietnam, India, and the Middle East.
Prestigious clients: CCCC, CRCC, MCC, Prologis, ESR, Sembcorp, Dhamra Port, Penta-Ocean, Gamuda, and CSCEC.

Conclusion

A stable foundation ensures lasting success.
Through its patented technologies, proven expertise, and international reach in consolidation, grouting, and replacement techniques, SUNZO stands as a trusted partner in foundation engineering.