Perencanaan Perkuatan Stabilitas Timbunan Jalan Tol Krian-Legundi-Bunder-Manyar STA 8+600 - STA 8+850

Ahmad, Fadhilah Aditya (2026) Perencanaan Perkuatan Stabilitas Timbunan Jalan Tol Krian-Legundi-Bunder-Manyar STA 8+600 - STA 8+850. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Jalan Tol Krian–Legundi–Bunder–Manyar (KLBM) menghubungkan Krian di Kabupaten Sidoarjo dengan Manyar di Kabupaten Gresik. Pada sepanjang STA 8+600 – STA 8+850 telah terjadi kelongsoran di beberapa titik, selain itu juga terjadi keretakan memanjang dan amblesan di beberapa titik bahu jalan. Penanganan kelongsoran sementara telah dilakukan dengan pemberian counterweight pada STA 8+650 dan 8+800. Hasil penyelidikan tanah dengan sondir dan borlog menunjukkan pada beberapa potongan jalan, timbunan berada diatas lapisan tanah lunak hingga kedalaman 4-6 meter. Untuk itu, dalam Tugas Akhir ini dianalisis penyebab keretakan jalan dengan melakukan analisis stabilitas timbunan eksisting tanpa dan dengan perkuatan counterweight. Jalan tol yang telah beroperasi selama hampir 5 tahun ini juga akan dianalisis pemampatan konsolidasi dan pemampatan sekunder, kemudian dihitung Rate of Settlement (RoS) dan differential settlement yang terjadi apakah memenuhi persyaratan yang diizinkan menurut Bina Marga. Hasil analisis menunjukkan bahwa ketidakstabilan timbunan menjadi faktor utama terjadinya kelongsoran dan keretakan, ditandai dengan nilai SF < 1,5 pada beberapa potongan STA untuk analisis internal stability maupun overall stability. Evaluasi terhadap perkuatan eksisting juga menunjukkan bahwa counterweight pada STA 8+650 belum mampu memberikan stabilitas yang memadai dengan nilai safety factor sebesar 1,16 < 1,5, sementara pada STA 8+800 telah mencapai kondisi stabil. Pada periode awal hingga menengah, laju pemampatan tanah dasar masih melampaui batas 2 cm/tahun. Seiring waktu nilai RoS menurun, dengan kinerja terbaik ditunjukkan oleh STA 8+700, sementara kondisi paling kritis terjadi pada STA 8+600 dan STA 8+650. Terdapat dua alternatif perkuatan tambahan yang direncanakan, yaitu penggunaan spun pile dengan variasi diameter 40 cm, 45 cm, 55 cm, dan 60 cm, serta kombinasi counterweight dan spun pile. Berdasarkan kebutuhan volume dan biaya material, penggunaan kombinasi counterweight dan spun pile memberikan efektivitas paling tinggi, dengan diameter spun pile 45 cm pada STA 8+600 dan STA 8+750.
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Krian–Legundi–Bunder–Manyar (KLBM) Toll Road connects Krian in Sidoarjo Regency with Manyar in Gresik Regency. Along STA 8+600 to STA 8+850, slope failures have occurred at several locations. In addition, longitudinal cracking and localized settlement have been observed at multiple points along the road shoulder. Temporary countermeasures were implemented by placing counterweight fills at STA 8+650 and STA 8+800. Soil investigations using CPT (sondir) and borehole logs indicate that, in several cross-sections, the embankment is founded on soft soil layers extending to depths of 4–6 m. Accordingly, this undergraduate thesis analyzes the causes of pavement cracking by evaluating the stability of the existing embankment, both without reinforcement and with counterweight reinforcement. Since the toll road has been in operation for nearly five years, primary consolidation settlement and secondary compression are also analyzed. The Rate of Settlement (RoS) and the resulting differential settlement are then calculated to assess whether they meet the allowable limits stipulated by Bina Marga. The analysis results show that embankment instability is the primary cause of the slope failures and cracking, as indicated by safety factors (SF) below 1.5 at several STA sections for both internal stability and overall stability analyses. The evaluation of the existing reinforcement further indicates that the counterweight at STA 8+650 has not provided adequate stability, with a safety factor of 1.16 (< 1.5), whereas the section at STA 8+800 has reached a stable condition. During the early to intermediate period, the settlement rate of the foundation soil still exceeds the limit of 2 cm/year. Over time, the RoS decreases, with the best performance observed at STA 8+700, while the most critical conditions occur at STA 8+600 and STA 8+650. Two additional reinforcement alternatives are proposed: (1) spun piles with diameter variations of 40 cm, 45 cm, 55 cm, and 60 cm; and (2) a combined system of counterweight and spun piles. Based on the required material volume and cost, the combined counterweight–spun pile system provides the highest effectiveness, with 45 cm diameter spun piles at STA 8+600 and STA 8+750.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Counterweight, Differential Settlement, Kelongsoran, Keretakan Jalan, Spun pile, Jadwal Overlay, Counterweight, Differential Settlement, Slope Failure, Road Cracking, Spun pile, Overlay Scheduling
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) T Technology > TA Engineering (General). Civil engineering (General) > TA749 Soil stabilization T Technology > TA Engineering (General). Civil engineering (General) > TA780 Piles and pile-driving
Divisions:	Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Civil Engineering > 22201-(S1) Undergraduate Thesis
Depositing User:	Fadhilah Aditya Ahmad
Date Deposited:	21 Jan 2026 07:58
Last Modified:	21 Jan 2026 07:58
URI:	http://repository.its.ac.id/id/eprint/129995

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