Engineering Design & Geotechnical Services

Infrastructure development is one of the key pillars driving national growth — from roads, bridges, tunnels, and high-rise buildings to dams and flood protection systems.
All these projects rely on civil engineering, and more specifically, geotechnical engineering, which focuses on the interaction between soil, structure, and the environment.

Natural disasters such as floods and earthquakes have highlighted the importance of resilient design, as they continue to cause significant losses in lives and property each year.

Recognizing these challenges, STS has established a specialized Geotechnical Engineering Division, offering integrated services that cover design, construction, maintenance, and remediation across all civil engineering fields.

Our Expertise

One of the key drivers of national development is the advancement of fundamental infrastructure—such as roads, bridges, tunnels (including mass transit, water conveyance, and utility conduits), high-rise buildings, and dams. All of these projects are directly related to the field of civil engineering, particularly geotechnical engineering, which focuses on both surface and subsurface structures.

In addition to infrastructure development, natural disasters such as floods and earthquakes have increasingly caused severe damage to lives and properties, resulting in significant annual economic losses worth billions of baht.

Recognizing the critical importance of these challenges, STS has continuously developed its Geotechnical Engineering Division, providing comprehensive services in design, construction, maintenance, and problem-solving across all areas of civil engineering. Our expertise covers foundation design for buildings, roads, bridges, dams, airports, underground tunnels (mass transit and wastewater systems), high-rise structures, and ground improvement projects.

We emphasize the selection of structurally appropriate solutions—above and below ground—integrated with other engineering disciplines, ensuring academic accuracy, structural stability, and cost efficiency. Because geotechnical engineering involves soil-structure interaction, and soil characteristics vary significantly by location, this field demands specialized expertise and precision in both design and construction.

STS is staffed by a multidisciplinary team of geotechnical engineers, soil mechanics specialists, engineering geologists, civil engineers, and other experts. We are committed to providing professional geotechnical engineering services using modern approaches that ensure both cost-effectiveness and client satisfaction, serving clients in both public and private sectors.

Our Core Services

At STS, we understand that every geotechnical project must be tailored to the specific soil conditions of its location. Our experienced team of geotechnical engineers, soil mechanics specialists, engineering geologists, and civil engineers provides professional and modern solutions to achieve cost efficiency and optimal performance for our clients.



Our services include:

1. Road Works

STS has conducted surveys and detailed designs for road construction projects nationwide, such as:

Road along Khlong Chong Nonsi (Narathiwat Ratchanakarin Road), Bangkok

Widening of Highway No. 304 (Kabinjaburi–Pak Thong Chai), Km.31+794 to Km.55+362, Department of Highways

Widening of Highway No. 33 (Prachinburi–Kabinjaburi), Km.150 to Km.186 (36 km) including 18 bridges, Department of Highways

2. Overpass Structures

STS has undertaken survey and detailed design works for intersection overpass bridges across the country, such as:

Overpass projects under the Department of Highways (World Bank Loan Project) at Bangphra, Chiang Mai, Lampang, Laem Chabang, Minburi, Saraburi, and Thepharak

3. Underpass Tunnels

STS has carried out survey and design services for underpass construction nationwide, such as:

Underpass at Dindaeng – Vibhavadi Rangsit, Bangkok

4. Riverbank Protection Dams

STS provides detailed design services for riverbank protection structures along both domestic and border rivers, such as:

Yom River Bank Protection, Moo 3 & 5, Ban Yan Yao, Nam Rad, Nong Muang Khai, Phrae

Mekong River Bank Protection, Ban Lao Lom, Moo 4, Na Si Nuan, Mueang Mukdahan, Mukdahan

Trang River Bank Protection with landscape improvement, Moo 10, Tha Saba, Wang Wiset, Trang

5. Coastal Protection Structures

STS has provided design services for coastal protection works across Thailand, such as:

Coastal Protection at Cha-Am Beach, Phetchaburi

Coastal Protection at Moo 4 and Moo 5, Pak Thera, Ranot, Songkhla

Coastal Protection near Laem Pho Temple, Koh Yo, Songkhla

Coastal Protection at Koh Kho Khao, Takua Pa, Phangnga

6. Flood Protection Systems

STS has designed flood protection systems for communities nationwide, such as:

Survey and Design of Flood Protection System for Angthong Province

7. Slope Stability Analysis

STS conducts slope stability analyses and improvement design projects throughout Thailand, such as:

Ground Improvement and Slope Stability Analysis for the Wastewater Treatment Pond, Nitro Chemical Industry Co., Ltd.