Browsing by Author "K. Piriyakul"

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    Pipe jacking tunnel construction crossing the Bang Pakong River
    (CRC Press/Balkema, 2021) K. Piriyakul; S. Pochalard; E. Rungrueng
    This article presented a case study on a pipe jacking tunneling project crossing underneath the Bang Prakong River in Thailand. This project belonged to the Thailand Irrigation Department and connected between the Klong Phra Ong Chaiya Nuchit and the Bang Pakong River. The technique and process of tunnel construction crossing the river by pipe jacking method were described in details. Moreover, the technique and process of shaft construction technique for jacking pit and receiving pit by sinking method were explained. The jacking pit was collapsed so it was reversed to be the receiving pit. This pit was rebuilt by the steel casing. Then the new jacking pit was improved from the old receiving by the jet grouting method. The jacking force was controlled under 900 Ton. The horizontal deviation was in between ±60 mm and the vertical deviation was in between ±70 mm along the tunnel line. © 2021 ISSMGE, London, UK
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    Using shear wave velocity to determine the cementation effect of soft Bangkok clay mixed with cement and fly ash
    (Springer Verlag, 2013) K. Piriyakul; S. Pochalard
    This paper presents the using of shear wave velocity to determine the cementation effect of soft Bangkok clay mixed with cement and fly ash. The Bangkok clay is mixed with 20 % of the Portland cement type 1 by weight of dry soil and varied the replacement of fly ash 10, 15, 20, 25 and 30 % by weight of cement. Then, these samples were cured to 7, 14, 28 and 90 days respectively and performed the bender element and unconfined compression test. From the results, the research found that the undrained shear strength and the shear wave velocity increased with increasing the curing time. The undrained shear strength data of 15 % of fly ash type F were maximum values and in good agreement with the result of no fly ash. In the similar ways, the shear wave velocity results of 15-20 % of fly ash type F were higher than the result of no fly ash in the long term. The relationship between the shear wave velocity and the undrained shear strength was Vs = 243.38(Su/Pa)0.305 and in good agreement with the field data. © Springer-Verlag Berlin Heidelberg 2013.