Evaluation Method for the Liquefaction Potential Using the Standard Penetration Test Value Based on the CPTU Soil Behavior Type Index

Taking the project of the Su-xin highway treated by using the resonant compaction method as the reference, a new method for the evaluation of liquefaction potential is proposed based on the piezocone penetration test (CPTU) and the standard penetration test (SPT). The soil behavior type index (Ic) obtained from CPTUs and the standard penetration test index (N63.5), obtained from SPTs, are analyzed for saturated silty sand and silt. The analysis result reveals a linear relationship between N63.5 and Ic, given by N63.5=−18.8Ic+52.0. The larger the value of Ic is, the greater the viscosity of soil is, and the smaller the value of N63.5 is. According to the method, liquefaction assessment of saturated silty sand and silt foundation can be conducted by using N63.5 based on the Code of Seismic Design of Building. N63.5 is expressed by a single Ic, which is calculated from the CPTU data. Compared with existing evaluation methods, this method can provide continuous standard penetration test values, moreover, this method involves a simple calculation, and the results obtained using the method are reliable.

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Analisis Potensi Likuifaksi Akibat Gempa Bumi Menggunakan Metode SPT (Standar Penetration Test) Dan Cpt (Cone Penetration Test) Di Kabupaten Bantul, Yogyakarta

Wahana Fisika ◽

10.17509/wafi.v2i1.7022 ◽

2017 ◽

Vol 2 (1) ◽

pp. 8 ◽

Cited By ~ 1

Author(s):

Tini Tini ◽

Adrin Tohari ◽

Mimin Iryanti

Keyword(s):

Soil Layer ◽

Cone Penetration Test ◽

Standard Penetration Test ◽

Silty Sand ◽

Penetration Test ◽

Cone Penetration ◽

Ground Acceleration ◽

Liquefaction Potential ◽

Liquefaction Hazard ◽

Better Than

Gempa bumi yang terjadi di daerah Bantul, Yogyakarta pada 27 Mei 2006 dengan magnitudo gempa bumi sebesar 6.3 SR dapat menyebabkan terjadinya bahaya likuifaksi yang dapat merusak bangunan khususnya di wilayah Bantul Yogyakarta. Investigasi geoteknik yang telah dilakukan di Bantul, Yogyakarta dapat memberikan gambaran lapisan tanah yang berpotensi terjadinya likuifaksi. Analisis potensi likuifaksi dilakukan berdasarkan data SPT (Standard Penetration Test) dan CPT (Cone Penetration Test) dengan percepatan maksimum tanah menurut Gutenberg Richter di daerah penelitian rata-rata bernilai sebesar 2.93 m/s2 dan menurut Donovan sebesar 2.88 m/s2. Hasil analisis penelitian menunjukan bahwa lapisan tanah yang berpotensi likuifaksi didominasi oleh jenis tanah pasir lanauan da lanau pasiran yang berada pada kedalaman 0.2 – 3 m, 0.4 m, 2.4 m, 3.6 m, 7.6 – 7.8 m dan 8.2 m. Pengaruh percepatan maksimum tanah menurut Gutenberg Richter lebih besar terhadap terjadinya likuifaksi daripada menurut Donovan. Perbandingan hasil analisis potensi likuifaksi antara data SPT (Standard Penetration Test ) dan CPT (Cone Penetration Test) pada daerah penelitian menunjukan adanya kesamaan potensi likuifaksi pada lapisan tanah dengan kedalaman yang sama diantaranya pada kedalaman 0.2 m-4 m, dengan nilai Cyclic Strees Ratio (CSR) rata-rata sebesar 0.2, sedangkan berdasarkan nilai Cyclic Resistance Ratio (CRR) terdapat perbedaan nlai. Analisis berdasarkan data CPT lebih baik daripada data SPT karena data CPT lebih rapat daripada data SPT.The earthquake that occurred in Bantul, Yogyakarta on May 27, 2006 with the magnitudo of the earthquake of 6.3 SR can caused liquefaction hazard which could damage to teh building in the municipals of Bantul, Yogyakarta. Geotechnical investigation was carried in Bantul Yogyakarta, can give information about liquefaction hazard in soil layer. The liquefaction potential lanalysis was conducted using SPT and CPT methods, with Gutenberg-Richter’s maximum ground acceleration is 2.93 m/s2 and Donovan’s maximum ground acceleration is 2.88 m/s2. Result of liquefaction analysis indicate that the soil layer domination of silty sand dan sandy silt at the depth of 0.2 – 3 m, 3.6 m, 4 m 7.6 – 7.8 m and 8.2 m. Gutenberg-Richter’s maximum ground acceleration having influential for liquefaction potential better than Donovan’s maximum ground acceleration. Ratio result of liquefaction was conducted using SPT same as soil layer with CPT in resech location at the depth 0.2 m-4 m, with value Cyclic Strees Ratio (CSR) is 0.2. Even value Cyclic Resistances Ratio (CSR) have different value. The liquefaction potential lanalysis was conducted using CPT method better than SPT methods.

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Liquefaction Assessment Using the CPT and Accounting for Soil Ageing

Aceh International Journal of Science and Technology ◽

10.13170/aijst.7.3.11544 ◽

2018 ◽

Vol 7 (3) ◽

pp. 162-168

Author(s):

Bambang Setiawan ◽

Mark Jaksa

Keyword(s):

Low Cost ◽

South Australia ◽

Standard Penetration Test ◽

Penetration Test ◽

Liquefaction Potential ◽

Cyclic Resistance ◽

Cyclic Resistance Ratio ◽

Conservative Estimation ◽

Liquefaction Assessment ◽

Soil Ageing

Due to its continuous data recording capability, excellent repeatability and accuracy, relatively low cost and simplicity of operation, the cone penetration test (CPT) offers enhanced liquefaction assessment over its predecessor the standard penetration test (SPT). However, soil ageing, which influences the cyclic resistance ratio (CRR), is difficult, if not impossible, to be detected by the CPT due to disturbance during the test. This situation may lead to excessively conservative estimation of CRR values which result in conservative assessment of liquefaction potential. This paper presents and discusses liquefaction assessment using the CPT and methods for accounting for soil ageing. A field study, conducted at Gillman, South Australia, is presented and the study site is assessed for liquefaction potential. This paper also explores the influence of soil ageing on the subsequent liquefaction assessment.

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Closure to “Standard Penetration Test-Based Probabilistic and Deterministic Assessment of Seismic Soil Liquefaction Potential” by K. Onder Cetin, Raymond B. Seed, Armen Der Kiureghian, Kohji Tokimatsu, Leslie F. Harder Jr., Robert E. Kayen, and Robert E. S. Moss

Journal of Geotechnical and Geoenvironmental Engineering ◽

10.1061/(asce)1090-0241(2006)132:5(667.2) ◽

2006 ◽

Vol 132 (5) ◽

pp. 667-669

Author(s):

K. Onder Cetin ◽

Raymond B. Seed ◽

Armen Der Kiureghian ◽

Kohji Tokimatsu ◽

Leslie F. Harder ◽

...

Keyword(s):

Standard Penetration Test ◽

Soil Liquefaction ◽

Penetration Test ◽

Liquefaction Potential

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Experimental Research on the Liquefaction Potential of Tailings Silt in Zhuziqing Tailings Dam

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.204-208.708 ◽

2012 ◽

Vol 204-208 ◽

pp. 708-713

Author(s):

Jing You Hu ◽

Jian Bin Xie ◽

Wei Li ◽

Cheng Hui Li

Keyword(s):

Mechanical Properties ◽

Experimental Research ◽

Field Survey ◽

Physical And Mechanical Properties ◽

Field Performance ◽

Standard Penetration Test ◽

Tailings Dam ◽

Penetration Test ◽

Liquefaction Potential ◽

Lab Test

The particle composition, physical and mechanical properties of tailings silt in Zhuziqing tailings dam were tested by means of field survey and lab test. And the liquefaction potential of tailings silt in Zhuziqing tailings dam were investigated based on field-performance data using standard penetration test (SPT) and wave velocity test (WVT) methods. Results show that the liquefaction potential of tailings silt in Zhuziqing tailings dam can be evaluated by means of SPT and WVT. Results also show that there is almost non liquefaction at the places in Zhuziqing tailings dam where are under the seventh sub-dam, and there is serious liquefaction in the new sub-dam and deposited beach, which locate at the places above the eleventh sub-dam.

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