scholarly journals Perencanaan Ulang Pondasi Pilar Jembatan Sikabu Kayu Gadang

2021 ◽  
pp. 64-67
Author(s):  
Chairi Ozi

The construction of transportation facilities such as bridges plays an important role in the development of human resources today because more and more road users will use these facilities. The Sikabu Kayu Gadang Bridge has a span of 100 meters with a structure of precast concrete, abutments, pillars and a foundation of concrete and steel piles which inspired the authors to conduct research. In this type of selection, several things need to be considered, such as the load being carried and the location of the hard ground. Based on this, this study aims to analyze the deep foundation that can be applied to the project in the hope of getting more efficient results. Based on the re-planning, the bearing capacity of the foundation permit (Qall) is 1254.98 kN with a diameter of 0.5 m and a depth of 20 m. The permitted bearing capacity of the pile group (Qall) is 12795.46 kN to withstand the loads acting on the superstructure. Bore Pile foundation logitudinal reinforcement = 10 D16 and Bore Pile shear reinforcement = ᴓ 12 – 150 mm.

Pondasi ◽  
2020 ◽  
Vol 23 (2) ◽  
pp. 1
Author(s):  
Adi Sunarno ◽  
Rinda Karlinasari ◽  
Abdul Rochim

ABSTRACTThe rapid infrastructure development is one of the indicators on the country economic progress. Indonesia as one of the largest archipelagic countries in the world, should be prioritized the port infrastructure to support the maritime. One of the government’s solutions is infrastructure development of Kuala Tanjung port. This research analyzed bearing capacity and settlement of single and group pile foundation on port infrastructure of Kuala Tanjung so it is known that the port is safe to use. The data used are Standard Penetration Test data with soil stratigraphy that is clay and sand. The type of foundation used is Concrete Spun Pile 1000 mm and 600 mm with a pile length of 36 meters. The data are then analyzed by manual calculation and Allpile 6.5E program based on Reese method and methods such as Vesic and Converse-Labarre. The results showed that single pile foundations of 1000 mm and 600 mm each had allowable capacity (Qall) 492.78-538.81 ton and 110.65-128.31 ton, with vertical load (Q) of 330.90 ton, settlement 0.56-1.17 cm and 3.32-3.64 cm, lateral deflection 27.50 cm and 94.90 cm. While the 1000 mm and 600 mm pile group foundations respectively have Qall 8717.31-10796.29 tons and 2059.25-2566.32 tons, with Q of 6618 tons, settlement 0.56-1.68 cm and 3.32-3.64 cm, lateral deflection of 2.49 cm and 19.49 cm. The conclusion of the research indicates that the safe pile foundation used is 1000 mm group pile foundation. Keywords: Bearing Capacity; Foundations; Pile Foundation; Port Infrastructure; Settlement


2018 ◽  
Vol 2018 ◽  
pp. 1-17 ◽  
Author(s):  
Tianzhong Ma ◽  
Yanpeng Zhu ◽  
Xiaohui Yang ◽  
Yongqiang Ling

It is very necessary to research the bearing characteristics of composite pile group foundations with long and short piles under lateral load in loess areas, because these foundations are used widely. But few people researched this problem in loess areas up to now worldwide. In this paper, firstly, an indoor test model of a composite pile foundation with long and short piles is designed and then employed to explore the vertical load bearing characteristics and load transfer mechanisms of a single pile, a four-pile group, and a nine-pile group under different lateral loads. Secondly, ANSYS software is employed to analyze the load-bearing characteristics of the test model, and for comparison with the experimental results. The results demonstrate the following. (1) The lateral force versus pile head displacement curves of the pile foundation exhibit an obvious steep drop in section, which is a typical feature of piercing damage. A horizontal displacement limit of the pile foundation is 10 mm and 6mm for the ones sensitive to horizontal displacement. (2) The axial force along a pile and frictional resistance do not coincide, due to significant variations and discontinuities in the collapsibility of loess; a pile body exhibits multiple neutral points. Therefore, composite pile groups including both long and short piles could potentially maximize the bearing capacity and reduce pile settlement. (3) The distribution of stress and strain along the pile length is mainly concentrated from the pile head to a depth of about 1/3 of the pile length. If the lateral load is too large, short piles undergo rotation about their longitudinal axis and long piles undergo flexural deformation. Therefore, the lateral bearing capacity mainly relies on the strength of the soil at the interface with the pile or the horizontal displacement of the pile head.


2018 ◽  
Vol 777 ◽  
pp. 559-563
Author(s):  
Yu Zhuo Jia ◽  
Guo Zheng Sun ◽  
Chang Qing Li ◽  
Long Long Tian

To analyze the characteristics of bearing capacity of high-cap pile foundation under inclined load and investigate the influence of vertical and horizontal component on the foundation at different loading angles, based on the background of the Yellow River Crossing project, a three-dimensional finite element model of high-cap foundation is simulated and analyzed with the finite element software ABAQUS. The conclusions are shown as follows: Under the same displacement condition, when the load inclination angle α from 0°(horizontal load) to 80°, the horizontal direction bearing capacity of the foundation increases from 684.8kN to 759.9kN, increases by 10.97%. Expands of vertical load component will affect the pile group effect, the shear force of the back row piles increases with the load inclined angle.


1971 ◽  
Vol 8 (1) ◽  
pp. 7-22 ◽  
Author(s):  
François A. Tavenas

As part of the design of an important pile foundation, an extensive testing program has been carried out in order to determine the type and the necessary characteristics of the pile best suited to the site and the structure to be designed. Three types of piles have been tested, i.e. timber piles, a steel H-pile, and a Herkules precast concrete pile. The Herkules and H-piles were equipped with deformation gauges and driven in 10-ft (3-m) increments to a total length of 70 ft (21 m), a loading test being carried out at the end of each increment. Thus, it was possible to determine the variations of the bearing capacity, the point–resistance, and the skin-friction as functions of the embedded pile length.The aim of this paper is to present the technique used and the results obtained.


2020 ◽  
Vol 2 (1) ◽  
pp. 69-76
Author(s):  
Putera Agung Maha Agung ◽  
Dea Putri Tsabita

AbstractSome damages of the Jalan Lintas Selatan Road, Suradita-Kranggan has occured every year with the identical failure cycle. One of the effort to make problem solving is to replace the base of road body construction with a concrete plate construction supported by circular pre-stressed concrete pile foundation (spun pile) system. The system will carry on the upper structure or embankment (subgrade) since the below of the structure exists soft soil layers and the depth of hard layer soil reachs more than 10 m. Later on, all vertical and horizontal forces including moments caused by the external loads can be retained by the plate and spun pile foundation system. The purpose of the study is to calculate the bearing capacity, negative friction force, settlement of spun pile group with using field test data (SPT and CPT); and diameter variation of pile is 30 cm to 50 cm. From calculations with the average length of 1400 cm and diameter of 50 cm can be determined bearing capacity of 298.9 tons by SPT and 504.3 tons by CPT data, respectively. Then, lateral bearing capacity is 168.5 tons (free pile head) and 344.2 tons (fixed pile head). The settlement occurred of a single pile foundation is 9.40 cm. The results of negative friction resistance were obtained is 81.9 tons. The group piles is designed of 2 (two) rows and 3 (three) columns and can be safe for receiving the construction and traffic loads. Based on the analysis results, the concrete plate and spun pile system has fullfilled to design criteria. Keywords: spun pile, bearing capacity, negative friction, settlement, pile group.AbstrakKerusakan pada Jalan Lintas Selatan, Suradita-Kranggan terjadi setiap tahun dengan siklus kegagalan yang sama. Salah satu upaya penyelesaian masalah tersebut adalah mengganti landasan konstruksi badan jalan dengan plat beton yang didukung oleh sistem pondasi tiang pancang bulat beton prategang (spun pile). Sistem ini akan memikul struktur atas atau timbunan (subgrade) karena di bawah struktur terdapat lapisan tanah lunak dan kedalaman tanah keras mencapai lebih dari 10 m. Nantinya, semua beban vertikal, horizontal berikut momen akibat beban luar dapat ditahan oleh sistem plat dan pondasi spun pile. Tujuan studi ini adalah untuk menghitung daya dukung, gaya gesek negatif, dan penurunan dari kelompok tiang menggunakan data hasil uji lapangan (SPT dan CPT), dan variasi diameter tiang adalah sebesar 30 cm sampai 50 cm. Dari hasil perhitungan dengan panjang rata-rata 1400 cm dan diameter tiang 50 cm dapat ditentukan daya dukung sebesar 298,86 ton (data SPT) dan 504,3 ton (CPT data) secara berurutan. Kemudian, daya dukung lateral sebesar 168,5 ton (kepala tiang bebas) dan sebesar 344,2 ton (kepala tiang terjepit). Penurunan tunggal rata-rata yang terjadi adalah sebesar 9,40 cm. Hasil tahanan gesek negatif diperoleh sebesar 81,9 ton. Kelompok tiang yang direncanakan adalah terdiri 2 baris tiang dan 3 kolom tiang dan aman untuk menerima beban konstruksi dan beban lalu lintas. Berdasarkan hasil analisis, sistem plat dengan spun pile telah memenuhi kriteria desain. Kata kunci: spun pile, daya dukung, gaya gesek negatif, penurunan, grup tiang.


2020 ◽  
Vol 9 (1) ◽  
pp. 70-77
Author(s):  
Amanda Rachmad Pratama ◽  
Rida Respati ◽  
Norseta Ajie Saputra

Soil bearing capacity is the ability of the soil to support the foundation load acting on it. To produce an accurate bearing capacity, it is necessary to know the properties and characteristics of the soil. For this reason, a comparison of the carrying capacity of the soil is carried out based on the calculation of CPT / Sondir and SPT to be able to plan a safe and economical pile foundation. The purpose of this study was to determine the amount of soil bearing capacity of the deep foundation in the environment around the Ataqwa Mosque, Baringin Village, Palangkaraya City based on field tests, and based on laboratory tests, and to determine the value of the comparison between the Mayerhof Method and the Schmertmann-Nottingham Method. Based on the Sondir value, it is continued with the calculation of the carrying capacity of the soil, then the calculation results are analyzed and concluded. From the calculation of the value of the carrying capacity of the foundation pile implementation of point 1 (one), the highest value of 400 mm diameter piles in the Meyerhoff method is 75,319 kg, while the lowest bearing capacity value is also at 400 mm piles of 10,676 kg. For point 2 (two), the highest value is obtained at 400 mm diameter piles in the Shmertmann-Nottingham method of 65,853 kg, while the lowest bearing capacity value is also at 400 mm piles of 10,676 kg


2018 ◽  
Vol 1 (2) ◽  
pp. 94-99
Author(s):  
Muhammad O Yunus

The pile foundation is one of the deep foundation types commonly used to support building loads when hard soil layers are deeply located. To determine the ultimate bearing capacity of a pile foundation of the load test results, there are several methods commonly used to interpretation test results such as Davisson method, Mazurkiewich method, Chin method, Buttler Hoy method and De Beer method. The aim of this study was to determine the characteristics of soft soil and bakau piles used in the study and to analyze the size of the bearing capacity ultimate of pile foundation that is modeled on a small scale in the laboratory. From the test results of material characteristics of the soil used is organic clay type with medium plasticity with specific gravity 2.75, liquid limit, LL = 50.36% and plasticity index, PI = 13.2%. While the results of testing the characteristics of bakau piles obtained average water content of 21.58%, tensile strength of 18.51 MPa, compressive strength of parallel fiber 23.75 MPa and perpendicular fiber 14.10 MPa, bending strength 106, 22 MPa, and strong split 29.91 MPa. From the result of loading test of the foundation model in the laboratory, it is found that the ultimate bearing capacity of the model without foundation is 41.00 kN with the ultimate settlement of 14.00 mm, the model of the 20 cm long bakau piles foundation is 52.00 kN with the ultimate settlement of 13.00 mm, the foundation model a 30 cm long bakau piles foundation of 54.00 kN with a 10.00 mm ultimate settlement, a 40 cm long bakau piles foundation model of 56.00 kN with an ultimate settlement of 8.50 mm.


2018 ◽  
Vol 18 (2) ◽  
pp. 65-76
Author(s):  
Ramanda Pratama ◽  
Anas Puri ◽  
Sri Hartati Dewi

[ID] Pondasi sebagai dasar bangunan harus mampu memikul seluruh beban bangunan dan beban lainnya, untuk diteruskan sampai kelapisan tanah atau batuan dibawahnya. Pemilihan jenis pondasi salah satunya disebabkan oleh jenis tanah dan jenis struktur atasnya, apakah termasuk konstruksi beban ringan atau beban berat, maka dari itu diperlukan stabilitas tanah itu sendiri agar mempunyai kapasitas dukung yang kuat. Tujuan dari penelitian ini menghitung kapasitas dukung aksial, kapasitas dukung lateral, penurunan, defleksi pondasi bored pile menggunakan metode statis dan elemen hingga 2D, menghitung tegangan geser efektif tanah dengan metode elemen hingga 2D yang kemudian membandingkan dengan beban bekerja dan syarat yang diizinkan. Dalam menganalisa beban bekerja pada bangunan dihitung menggunakan bantuan software Etabs v.9. Analisa kapasitas dukung pondasi bored pile tunggal menggunakan metode Aoki & Alancer, Schmertmaan & Nottingham, Begemaan, dan untuk menghitung kapasitas dukung pondasi bored pile (group) digunakan efisiensi kelompok tiang, sedangkan kapasitas lateral dan defleksi digunakan metode Broms dan penurunan pondasi bored pile tunggal menggunakan metode Dee Beer & Marten, untuk kelompok tiang menggunakan metode Vesic dan tegangan geser efektif tanah. Dan akan dilakukan analisa menggunakan elemen hingga 2D dengan bantuan software Plaxis 2D v.8.2. Dari hasil perhitungan dan persentase nilai terbesar kapasitas dukung (Qgall) pondasi bored pilegroup As I-39 dan As C-26 pada titik S-1 dengan metode Schmertmaan & Nottingham sebesar 128%, metode Begemaan sebesar 139% dan elemen hingga 2D sebesar 169% dan dinyatakan pondasi aman terhadap beban yang bekerja pada pile cap, sedangkan metode Aoki & Alancer sebesar 39%, dinyatakan tidak aman terhadap beban yang bekerja pada pile cap. Dan kapasitas beban lateralmetode Broms mampu memikul sebesar 167% dan elemen hingga 2D sebesar 105% dan dinyatakan aman terhadap beban horizontal yang bekerja. Sedang defleksi pondasi bored pile  metode Broms sebesar 2,39 mm, elemen hingga 2D sebesar 3,46 mm, dan penurunan pondasi tunggal dengan metode Dee Beer & Marten sebesar 9,78 mm, elemen hingga 2D sebesar 36,40 mm dan pondasi bored pile group metode Vesic sebesar 21,87 mm dan elemen hingga 2D sebesar 16,78 mm, dapat dinyatakan defleksi dan penurunan memenuhi syarat yang diizinkan, dan tegangan geser efektif tanah tunggal tanpa interface dan dengan interface tidak memenuhi syarat yang diizinkan. [EN] Foundation, as the building basic must be able to carry the whole building load and other loads to be forwarded to the soil or rock layers underneath. Selection of the foundation type one caused by the type of soil and the type of structure above, whether included construction of a light load or a heavy load, therefore it needed the stability of the land itself in order to have a strong bearing capacity. The purpose of this studies are to calculate the axial bearing capacity, lateral bearing capacity, decreasing, and bored pile foundation deflection using static and 2D finite element method, and calculate effective shear stress of soil with 2D finite element method, then compare with the workload and terms are allowed. In analyzing the workload on buildings, the calculation using ETABS software v.9. Analysis of bearing capacity of single bored pile foundation use Aoki & Alancer, Schmertmaan & Nottingham, Begemaan method, and to calculate the bearing capacity of bored pile foundation (group) used the pile groups efficiency, while lateral capacity and deflection used Broms method and reduction single bored pile foundation used Dee Beer & Marten method, for pile group using Vesic method and effective shear stress of soil. And will be analyzed using 2D finite element with Plaxis 2D software v.8.2. From the calculation and the percentage of the bearing capacity greatest value (Qgall), bored pile group foundation As I-39 and As C-26 at S-1 point with Schmertmaan & Nottingham method amounted to 128%, Begemaan method amounted to 139% and the 2D finite element amounted to 169 % and foundation declared safe to the load on the pile cap, whereas Aoki and Alancer method amounted to 39%, declared unsafe to load on the pile cap. And the lateral load capacity Broms method capable of assuming at 167% and the 2D finite element about 105% and declared safe to horizontal workload. Bored pile foundation deflection with Broms method amounted to 2.39 mm, 2D finite element amounted to 3.46 mm, and a decrease in single foundation with Dee Beer & Marten method amounted to 9.78 mm, 2D finite element amounted to 36.40 mm and bored pile group foundation Vesic method amounted to 21.87 mm and 2D finite element amounted to 16.78 mm, it can be stated that deflection and decrease are eligible permitted, and effective shear stress of single soil with and without interface are ineligible permitted.


2008 ◽  
Vol 3 (1) ◽  
pp. 73-83
Author(s):  
Koichiro DANNO ◽  
Koichi ISOBE ◽  
Makoto KIMURA

2021 ◽  
pp. 1-11
Author(s):  
Jihan Melasari ◽  
Meri Sufina ◽  
Afdhal Yusra

Solid construction certainly has a strong foundation that sustain Minimizing the potential for a settlement and the destruction of the foundation is so important to be known. So we should be able to know exactly how large a bearing capacity of the foundation. The purpose of this thesis is to redesign the foundation witha bore pile foundation. So in terms of knowing the size of the bearing capacity of the foundation, ,we discusses how the value of the bearing capacity of the foundation analytically which in this case using mayerhoff method, the from data SPT will using reese & wright method and mayerhoff method. The value of bearing capacity that we seek to determine the strength of the foundation that suffer a load the which is located thereon. legislative officebuilding Dharmasraya using a pile foundation and design with bore pile foundation, At the point BH-1 the carrying capacity of the single pile foundation is greater than the load, the foundation is said to be safe, Q permits> the rated load is 2000,32 tons > 47,973 tons. At point BH-2 the bearing capacity of the pile foundation of the group is greater than the load, the foundation is said to be safe, Q permits > 2073,532 tons > 1218,989 tons. At point BH-1 the carrying capacity of single bore pile foundation is greater than load carrying, the foundation is said to be safe, Q permit> the mean load is 1230,249 tons > 47,973 tons. At BH-2 point thecarrying capacity of the bore pile foundation is larger than the load, the foundation is said to be safe, Q permits> the rated load is 1222,337 tons > 1218,989 tons. 


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