Pengaruh Penambahan Semen terhadap Kuat Geser Lempung Sebelum dan Sesudah Penjenuhan

Soil is a material that very influential in the contruction work. Major issues in soft soil are low bearing capacity and high settlement condition. One of soil stabilitation effort is mixing PCC cement in specific content by the soil to improve shear strength. This research aims to study UCS and CBR values of mixed clay and cement at 2%, 3%, 4% and 5% content variations on soaked condition. The result showed that increasing cement content until 5% mixture raising soil dry density still optimum mouisture content decrease. While over 5% cement mixture showed contrary behavior. UCS and CBR values not influenced by soaking process

Analisis Kestabilan Lereng Gambut Pesisir Utara Bengkalis

Peat soil slope stability is influenced by soil properties, the depth of the water table and the effect of loading or surcharges. Land conversion on areas can cause changes in peatland hydrological balance that led to a decrease in ground water level and causing slope failure. This study analyzes slope stability modeling based on the limit equilibrium principle by Morgenstern-Price method. The current peat slope collapse in the Bengkalis Island North Coast continue to occur by progressive despite to the decline in groundwater levels provide increasing peat slope safety factors

Korelasi Empirik Kompresibilitas Tanah Permukaan di Kota Pekanbaru

Preliminary study is needed to provide a general overview as well as the characteristics of the local soil conditions. So, we need an estimate of the local soil conditions and characteristics based on soil conditions and characteristics that have been known about the condition and characteristics, in order for a plan to be more efficient. Basically one soil parameter that is needed in the design of index compression (compression index) can be found using the correlation formula. This study aims to find the correlation formula recommendations more precise than some formula to use in calculating or predicting the value of index compression. Hand drill data obtained from the Laboratory of Soil Mechanics. To find a correlation formula recommendations, used some statistical parameters such as mean, standard deviation, and correlation index. Zoning analysis results showed that the thickness of the soft soil in general area of Pekanbaru has soft soil thickness was (a thickness of ten to fifteen feet). Zoning analysis results showed that the level of congestion ground Pekanbaru City area has a moderate level of congestion ground. From the evaluation of the correlation formula, based on static parameters obtained correlation formula recommendations azzous et al (1976) that Cc = 0:40 (E-0.25) and Cc = -0156 + + 0.00058wn sebgai 0.41eo correlation formula is best used in Pkenabaru

Karakteristik Mekanis dari Campuran Abu Terbang dan Abu Dasar dalam Geoteknik

Generally, coal are used for fuel by industry factory at Indonesia. Coal burning produce two of kind waste, that is fly ash and bottom ash. Utilization of coal waste is not optimal yet at this time. This research aims to find out optimum percentage from fly ash and bottom ash mixed by mechanical strength and to know curing effect for 0 and 28 days. The result of proctor standard is increasing proportion bottom ash content on fly ash and bottom ash mixed, then increased dry density maximum while optimum moisture content is decreased. CBR value is increased with increasing bottom ash content. From UCS test, value shear strength (cu) is decreased because increasing bottom ash content. Value from CBR, UCS and Triaxial test is increased after curing for 28 days

Interpretasi Lapisan Bawah Permukaan Tanah Menggunakan Metode Geolistrik 2-D (Mapping)

Research was conducted at a location in Pekanbaru city. On this location has two test line at a distance from each other as far as 3 m, which for each testing line will be tested by using 2D geoelectric Wenner and dipole-dipole arrays then performed data processing by software Res2dinv. In addition, there will be handbor and laboratory testing for the soil in depth 1, 2, and 3 m to determine the soil classifications. And then, this result will be compared or matched with geoelectric result. Generally, the geoelectric (soil resistivity) results from the both arrays is sufficient to represent the actual potention of underground conditions. That can be evidenced with have suitability result between geoelectric, handbor, and laboratory test. In this result, Wenner array gives better result than dipole-dipole array. Wenner array gives resistivity range more closer and layers of the soil are easier to interpret than dipole-dipole array

Perbandingan Kapasitas Dukung Aksial Pondasi Tiang Tunggal dengan Beberapa Metode Analisis (Studi Kasus : Pondasi Rumah Sakit Pendidikan Universitas Riau Pekanbaru)

A pile foundation design should be done carefully and as carefully as possible. Each foundation must be able to support loads up to the limit safely, including supporting the maximum load that may occur. The purpose of this study was to determine the bearing capacity and settlement of pile foundation at Rumah Sakit Pendidikan Universitas Riau Pekanbaru Project. Analyses were performed by static and dynamic methods to determine the bearing capacity of piles and settlement. Bearing capacity of piles with static methods is calculated based on the data field (SPT) and laboratory while the method of dynamically calculated based on the field data is data obtained static load test and Pile Driving Analyzer (PDA) while driving operation. In this paper, we describe briefly how the calculate bearing capacity of the pile vertical for some methods such as Meyerhof, Poulus dan Davis, U.S Army Corps, Briaud et al. (1985), Metode β, Software All Pile and From the analysis data , ultimate bearing capacity vertical for single pile base on SPT and laboratory methods Briaud et al. (1985) is near ultimate bearing capacity for single pile base on static load tes

Pengaruh Spasi pada Performa Prefabricated Vertical Drain (PVD) dalam Perbaikan Tanah Lunak

Soil condition heaps of times be a problem in a construction work, it is cause the condition soft soil layer have low permeability. Soft ground improvement with vertical drain is complex analysis for consolidation, got in on space of prefabricated vertical drain (PVD). Space is influential at times of settlement. If space too small then it's not economical, because it will more point to installation PVD. So, did analysis comparison Chai et al method and average method. This comparison between the two method give the result is not to be different, so installation PVD should be with space 1,5 m. it's from the result with soil data of PLTU Riau

Analisis Sistem Penurunan Konsolidasi Multi-Layer

Construction on thick soft soils is often faced by settlement problems, which need particular concern. In order to reduce settlement friction piles are often used. However the effectiveness of group friction piles related to their dimension has not been fully understood. Therefore settlement analysis need to be conducted. In addition, in practice one-point settlement is generally used for preliminary assignment. This approach is considered to be very rough analysis. This research will show the comparison between one-point method and multi-layer method. For group friction pile analysis, simplified boussinesq stress distribution (2 verticals : 1 horizontal stress distribution) is applied in settlement calculation. This research shows that multi-layer settlement calculation is recommended for preliminary settlement assignment