Engineering English
Standard Penetration Test
Civil Engineering · Last updated: July 30, 2026 · How this entry was written
Definition: An in-situ dynamic penetration test that drives a split-barrel sampler into the soil to obtain a disturbed sample and measure the blow count (N-value). It is widely used to estimate soil strength and liquefaction potential.
Example in context
“The geotechnical report used the standard penetration test results to classify the soil and recommend foundation depth.”
“Jeoteknik rapor, zemin sınıflandırması ve temel derinliği önerisi için standart penetrasyon testi sonuçlarını kullandı.”
Where engineers use it
The standard penetration test is performed during site investigation to obtain the N-value, which correlates with soil density and strength. Engineers rely on SPT for foundation design and liquefaction assessment.
Synonyms: SPT
Practice: can you use “Standard Penetration Test” at work?
You are evaluating a sandy soil site for a new building. The client asks how you will determine the soil's relative density and bearing capacity. Explain the role of the standard penetration test.
Show a model answer
“Describe the procedure and purpose of the standard penetration test in site investigation.”
“Standard Penetration Test” in 21 languages
| English | Standard Penetration Test |
|---|---|
| Turkish | standart penetrasyon testi |
| French | essai de pénétration standard |
| German | Standard-Penetrationstest |
| Spanish | ensayo de penetración estándar |
| Chinese | 标准贯入试验 |
| Arabic | اختبار الاختراق القياسي |
| Portuguese | ensaio de penetração padrão |
| Russian | стандартный пенетрационный тест |
| Japanese | 標準貫入試験 |
| Italian | prova di penetrazione standard |
| Vietnamese | thí nghiệm xuyên tiêu chuẩn |
| Hindi | मानक प्रवेशन परीक्षण |
| Thai | การทดสอบการเจาะมาตรฐาน |
| Indonesian | uji penetrasi standar |
| Korean | 표준 관입 시험 |
| Bengali | স্ট্যান্ডার্ড পেনিট্রেশন টেস্ট |
| Dutch | standaard penetratietest |
| Swedish | standardpenetrationstest |
| Finnish | tavallinen tunkeutumiskoe |
| Ukrainian | стандартний пенетраційний тест |
Frequently asked questions
What does Standard Penetration Test mean in engineering?
An in-situ dynamic penetration test that drives a split-barrel sampler into the soil to obtain a disturbed sample and measure the blow count (N-value). It is widely used to estimate soil strength and liquefaction potential. In Civil Engineering, the term carries a usage-frequency rating of 10/10 in the Engineering English library.
How do you pronounce Standard Penetration Test?
Standard Penetration Test is pronounced /ˈstændəd ˌpɛnəˈtreɪʃən tɛst/ (IPA). The Engineering English app plays audio for the term and checks your pronunciation with speech recognition.
How is Standard Penetration Test used in a sentence?
Example from an engineering context: “The geotechnical report used the standard penetration test results to classify the soil and recommend foundation depth.”
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