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All Journal Jurnal Teknik Sipil Teknisia Pena Teknik : Jurnal Ilmiah Ilmu-ilmu Teknik
Bambang Setiawan
Universitas Sebelas Maret
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Engineering Mechanical Engineering Transportation

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Tahanan Lateral Pondasi Tiang Berdasar Cone Penetration Test Sumiyati Gunawan; Niken Silmi Surjandari; Bambang Setiawan
Jurnal Teknik Sipil Vol. 15 No. 4 (2020)
Publisher : Program Studi Teknik Sipil Fakultas Teknik Universitas Atma Jaya Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (550.569 KB) | DOI: 10.24002/jts.v15i4.3798

Abstract

Kapasitas beban lateral pondasi tiang (Pu) merupakan hal utama untuk perencanaan konstuksi dengan beban lateral yang cukup dominan. Kapasitas Pu didasarkan pada kondisi keseimbangan resultan gaya pada tiang dan ketahanan tanah lateral serta distribusi tekanan tanah PL sepanjang kedalaman tiang berdasarkan metode konvensional, tetapi sulit diterapkan pada tanah nonhomogen, karena kondisi tanah nonlinier terhadap kedalaman. Insitu test yang paling sering digunakan karena mudah, cepat dan hemat biaya adalah cone penetration test (CPT), yang memberikan profil tanah secara kontinu, dan lebih mendefinisikan jenis lapisan, ketebalan, dan kepadatan dari masing masing lapisan. Meskipun jarang disebut dalam literatur tentang penggunaan data CPT untuk menganalisa perilaku defleksi pondasi tiang, beberapa peneliti menyatakan hubungan antara resistensi kerucut qc dan tahanan lateral tanah Pu di sepanjang kedalaman tiang. Salah satu metode yang menyajikan pengembangan metode kurva p-y untuk pondasi tiang dengan dasar resistensi penetrasi kerucut qc adalah Bouafia, A. (2014). Berdasarkan pengembangan oleh Bouafia, penulis menganalisa hubungan antara resistensi kerucut qc dan ketahanan lateral tiang Pu untuk menentukan beban lateral pondasi tiang pada tanah lunak di Wates, Kulon Progo DIY dan dibandingkan dengan teori Broms 1964; metode Kurva p-y, dan pengembangan rumus Bouafia, dengan kekakuan tiang, jenis tanah dan defleksi maksimum yang sama maka diperoleh sebagai berikut, teori Broms, LBroms=14,16m ; PuBroms=32,4ton ; MBroms=19,88tonm. Metode Kurva p-y, Lp-ycurve =14,4m ; Pup-ycurve s=28,0ton ; Mp-ycurve =7,50tonm dan Metode Bouafia, LBouafia =17,9m ; PuS2bouafia=34ton; PuS4bouafia=14,8ton; MS2bouafia =11,3tonm ; MS4bouafia =4,9tonm.
RESPON TIANG DALAM KELOMPOK TERHADAP GAYA LATERAL METODE STRAIN WEDGE Sumiyati Gunawan; Niken Silmi Surjandari; Bambang Setiawan
TEKNISIA Vol. XXV, No. 2, November 2020
Publisher : Jurusan Teknik Sipil, Fakultas Teknik Sipil dan Perencanaan, Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/teknisia.vol25.iss2.art5

Abstract

Calculation of lateral bearing capacity of the foundation becomes very important if lateral loads dominate, for example the foundation on bridges, tall buildings, and tower structures. Pile foundations that receive lateral loads, are generally calculated based on the ability of a single pile even though in its application, pile groups are always used. The carrying capacity of the pile group in lateral direction is not the same as the sum of the carrying capacity of a single pile in a pile group. This is due to the differences in the reduction factor supported by the force, direction of the force, number of piles in the group, position of piles in the group, diameter of the piles, the distance between the piles, stiffness of pile, type and stiffness of the soil. This research will analyze the bearing capacity of the pile group using the strain wedge method in the 1x3 and 3x1 configurations with a round steel pipe with a diameter of D = 0,4 m and a square steel pipe with a width of B = 0,429 m; length varies between L = 8,0 m to L = 20,0 m, 2 m intervals and the ratio of pile distance and diameter S/D = 3, on soft silt sand soils with an inner friction angle of 10o and a weight volume of 1200 kg/m3. The results obtained, in the configuration 1x3 the lateral resistance of the square pile is greater than the circle pile about 2,1 times at all pile positions in the group, with S/D = 3. So if L = 10 m, the interaction between the pile and soil insignificant so that the lateral bearing capacity of each pile is the same as a single pile, the multiplier factor for square and circular piles is almost the same. In the configuration 3x1 the lateral resistance of the square pile is greater than the circle pile about 1,4 times at all pile positions in the group. For piles with length L = 10 m, the multiplier factor of the square pile is greater than the circle pile by 1,07 times at all pile positions in the group, and for L = 10 m, the multiplier for the circle pile is greater than the square pile by 1,04 times in all pile positions in the group.
Expansive Soil Swelling Test of Small Scale Laboratory Model on Sambungmacan Soil, Central Jawa Cahyo Agung Saputra; Bambang Setiawan; Yusep Muslih Purwana
PENA TEKNIK: Jurnal Ilmiah Ilmu-Ilmu Teknik VOLUME 8 NUMBER 1 MARCH 2023
Publisher : Faculty of Engineering, Andi Djemma University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51557/pt_jiit.v8i1.1431

Abstract

Soil is one of the most important elements in any civil engineering work, almost all construction activities are related to soil. One of the most common soil problems is expansive soil. This type of soil has a high potential to expand when compared to other types of soil. This research aims to find out how expansive the tested soil is and how it reacts when wetting. The test in this research is experimental, where the expansive soil test is modeled in a rectangular test box with a soil volume of 0.08 m3. The swelling and expansion pressures were measured using proving rings and dials, each totaling five units. The expansive soil used came from Sambungmacan Subdistrict, Sragen Regency, Central Java. The results of the property index test of Sambungmacan soil have a plasticity index percent value of 49.33% and a liquid limit (LL) of 90.16%. The test results showed that the maximum swelling reached 28.3% of the initial soil height of 200 mm and the maximum soil swelling pressure reached 103.23 kPa with a moisture content of 22.62%. The maximum pressure that occurs in each proving ring is at an average moisture content of 31.81%. The results of this study also show the effect of every 1% moisture content will produce a percent soil swelling of 0.40% to 1.08% and the average percentage of swelling pressure that occurs is in the range of 4.65 kPa to 10.26 kPa at every 1% swelling.
Co-Authors Cahyo Agung Saputra Niken Silmi Surjandari Sumiyati Gunawan Yusep Muslih Purwana