Evaluation of p-y Curves for Group Piles in Cohesive Soil Based on 3D Numerical Analysis

The pile foundation supported on a structure can generate large horizontal loads due to earthquakes, high winds, and wave actions. The behavior of piles when subjected to horizontal load is generally analyzed using the p-y curve and “p-multiplier (Pm),” which is the coefficient of the group pile effect. In this study, the p-y curves and Pm were calculated by analyzing a single pile and group of piles arranged in 3 × 3 installed in cohesive soil using the finite element analysis program, Plaxis 3D. The soil resistance (p) increased as the undrained shear strength of the clay increased and the distance between the pile centers (S/D) increased. In the case of the group pile effect, when Pm was closer to the center of the group pile, the distance between the pile centers was smaller, and Pm was less due to the interference effect of the adjacent individual piles. In conclusion, it was observed that Pm is affected by the location of the individual piles and the distance between the pile centers.

Soil-Structure Interaction Study on Group pile over Monopile Foundation

Soil structures are very important for very good strength and durability to the reinforced concrete structures. it is extensively used for bridges, turbines, dams, industrial structures, and other heavy structures. soil-structure interactions are extensively used for seismic responses to the structures. it is mostly used in geotechnical investigations on pile foundations. The main importance of soil-structure interaction is the response of soil and structure and it influences the motion of ground and motion of the structure. It is one of the important factors to know the interactions between the soil and the ground. If the soil interactions are good, then the structure will be safe and strong and withstand the seismic effects. So, the study of soil interaction is important for any structure for safety and serviceability conditions. This paper mainly focuses on group piles over the monopile foundation of soil interaction. This mainly explains the importance of a monopile foundation over the group pile foundation. Monopile foundation is simple to type construction and standard foundation nowadays. This paper is mainly focused on soil structure and its interaction and as well monopile foundation and its importance.

PERBANDINGAN EFISIENSI LATERAL FREE DAN FIXED HEAD MENGGUNAKAN ELEMEN HINGGA PADA GALIAN TANAH KOHESIF DAN NON-KOHESIF

ABSTRACTFoundation is the important way for designing upper structure or below structure. Designing foundation is a must, especially for the complicated structure. There are so many things to be focused on sturdy foundation. One of those design steps is designing foundation with lateral loading. Lateral loadings are so many different variances of it, depends on the location of installation. Then, we can identify the efficiency of individual pile on group pile cause of lateral loadings. The efficiency of pile can be analysed by Finite Element metho, which is the foundation is located on the real condition of loading and soils between the pile. And then, Finite Element is supposed to identify the foundation with free-headed pile or fixed-headed pile on cohesive or cohesionless soils. ABSTRAKFondasi merupakan hal penting bagi struktur atas maupun struktur bawah. Perencanaan fondasi sendiri sangat dibutuhkan, apalagi untuk membuat struktur yang rumit, diperlukan fondasi yang kuat. Banyak sekali hal-hal yang harus diperhatikan untuk bisa merancang fondasi yang kokoh. Salah satunya dengan perancangan pembebanan akibat beban lateral. Beban lateral sendiri dapat bermacam-macam bentuknya, bergantung pada pondasi tersebut dipasang di daerah yang seperti apa. Efisiensi lateral tiang yang umum digunakan, didapatkan dari eksperimen di lapangan, dimana kondisi kepala tiang adalah pada kondisi free-head. Hal ini bertujuan juga untuk melihat kinerja fondasi tersebut apabila dalam kondisi Free Head, maupun Fixed Head dengan tanah kohesif dan non-kohesif.

ANALISA DAYA DUKUNG PONDASI TIANG PANCANG PADA PROYEK PEMBANGUNAN GEDUNG KULIAH TERPADU POLITEKNIK PARIWISATA PALEMBANG

This researcher focused on an exprimental study of the carryng capasity of a group pile foundation used in the palembang tourism polytechnic integrated lecture building, bearing in mind that this type of foundation is capable of supporting a considerable burden. To determine the carryng capacity of the pile foundation carrying capacity calculation based on N-SPT data using tarzaqi and Peck (1948)Researches conducted at point P6 2b at the integrated lecture building in palembang tourism polytechnic using diameter variation of Ø30, Ø35, Ø40, Ø60 with depth variations of 24,25,26 meters and quality of concreate k-500.The result of the carrying capacity of the group pile foundation,at point P6 2b by using the calculation of tarzaqi and peck (1948) amounted to 3803. 19 Kn. From the calculation of variations at point P6 2b the e Øen Ø30 is a depth of 35.5 m with a volume of 15.60 m3 with KnKeywords: Efficiency of bearing carryng, variations in group piles, Terzaghi and peck (1948)

Group Pile Effect on Temperature Distributions inside Energy Storage Pile Foundations

Energy storage pile foundations are being developed for storing renewable energy by utilizing compressed air energy storage technology. Previous studies on isolated piles indicate that compressed air can result in pressure and temperature fluctuations in the pile, which can further affect safety of the pile foundation. Meanwhile, the temperature changes and distributions for the pile and surrounding soil also are influenced by adjacent piles in typical group pile constructions. Therefore, dynamic thermal transfer simulations were conducted in this paper to investigate the temperature changes and distributions in the concrete pile and surrounding soil for group pile construction. The main parameter in this study is the spacing of the piles. The analysis results show that the group pile effect significantly increases the temperature up to more than 100 °C depending on the location and changes its distribution in both concrete and soil due to the heat transferred from the adjacent piles. The final stabilized temperature can be as high as 120 °C in the concrete pile and 110 °C in the soil after numerous loading cycles, which is about 4 times higher than typical thermo-active energy pile applications. Thus, it is important to include the group pile effect for design and analysis of the energy storage pile foundation.

ANALISIS PERFORMANCE LEVEL SENDI PLASTIS LOKAL PADA FONDASI TIANG TUNGGAL DAN TIANG KELOMPOK

Foundation is part of the structure that was build first and the most important part to guarantee the establishment of a building. The foundation function in general are to carry and distribute building loads into the ground. The loads channeled into the ground in the form of axial loads and lateral loads. Generally for high buildings used in the form of foundation piles or bored piles. To find out the design capabilities of a building in maintaining its robustness, naturally some analysis of the lower and upper structures needed. Especially in the lower structure, which is the foundation of a single pile or a group of piles, one of which can be done is a pushover analysis of the pile. By conducting pushover analysis on a pile foundation, the level of performance of the single pile foundation and group pile can be determined. From the results of pole pushover analysis will be obtain including the maximum deflection value and the melting value of pole. From the two data, it can be seen the value of the ductility of various types of pile foundation materials used. In this case, this journal will calculate the ductility and overstrength of a single pile foundation and group pile with variation dimensions.

REVIEW OF BEARING CAPACITY AND SETTLEMENT OF PILE FOUNDATION IN PORT INFRASTRUCTURE

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