PERBAIKAN TANAH PADA TANAH GRANULAR DENGAN VIBROCOMPACTION

Land requirements in big cities like Jakarta continues to increase with the growth in infrastructure development. Often the development and utilization of such land should be carried out on land that does not in accordance with the requirements. For example construction on the ground that is less stable during vibration or earthquake as granular soils. Compaction method is generally preferred in granular soil improvement because the method is suitable for use in soil layers not berkohesi that is not solid enough. Land improvements made to the land that has a fairly low technical characteristics become viable material used as a construction material. Benefits of using the technique of vibro compaction, among other things increase the weight of the volume of soil, reducing the decline foundation and reduce the impact of liquefaction

Pengaruh Limbah Slag Baja Terhadap Parameter Kuat Geser Tanah Dasar

Pembangunan prasarana transportasi yang terus dilakukan baik oleh pemerintah maupun swasta tidak seimbang dengan tersedianya lahan yang strategis. Hal ini yang menyebabkan pembangunan prasarana transportasi khususnya jalan raya, tak jarang berada di atas tanah dasar yang kurang baik. Tanah dasar yang kurang baik umumnya berjenis tanah lunak, tanah yang berbutir halus atau tanah yang memiliki kembang susut besar. Untuk mengatasi permasalahan tersebut, dilakukan perbaikan terhadap tanah dasar yang salah satu metodenya adalah stabilisasi dengan menambahkan bahan aditif seperti limbah slag baja. Penambahan slag baja pada tanah lunak akan ditinjau perubahan karakteristik fisik yaitu kadar air, berat jenis dan batas-batas konsistensi, serta perubahan karakteristik mekanik yaitu parameter kuat geser dari pengujian geser langsung. Berdasarkan hasil pengujian karakteristik fisik yaitu nilai kadar air, berat jenis dan batas-batas konsistensi tanah lunak mengalami penurunan seiring dengan penambahan slag baja dibandingkan tanah asli. Sedangkan untuk pengujian karakteristik mekanik yaitu nilai kohesi pada tanah lunak mengalami penurunan dan hal ini berbanding terbalik dengan nilai sudut geser dalam yang mengalami peningkatan seiring dengan penambahan slag baja pada tanah lunak

Pengaruh Variasi Jarak Tiang Bor Pada Tanah Lempung Terhadap Daya Dukung Dengan Metode Analisis

Letak lapisan tanah lempung kaku yang memiliki daya dukung cukup umumnya terletak pada kedalaman yang cukup jauh, sehingga pondasi tiang bor menjadi pilihan yang sering digunakan. Daya dukung pada kelompok pondasi tiang bor dipengaruhi oleh bahan pembentuk tiang, jarak antar tiang, banyaknya tiang yang digunakan dan susunan tiang. Variasi jarak yang digunakan pada kelompok tiang akan menyebabkan zona tegangan serta dapat menimbulkan keruntuhan tamah disekitar pondasi. Analisis efisiensi daya dukung kelompok tiang bor digunakan metode Converse Labarre dengan variasi jarak antar tiangbor  yang digunakan adalah 2,5D dan 3D serta perhitungan penurunan menggunakan metode Vesic. Hasil penelitian dengan menggunakan diameter tiang 1 meter didapatkan efisiensi daya dukung pada jarak 2,5D dan 3,0D berturut-turut adalah 4721,851 ton dan 5057 ton. Berdasarkan hasil tersebut maka jarak 2,5D merupakan  susunan kelompok tiang bor yang dipilih dengan penurunan sebesar 267,199 meter

PERENCANAAN PERKERASAN LENTUR DENGAN STABILISASI TANAH DASAR MENGGUNAKAN BUBUK KERAMIK DAN BUBUK KACA

Abstrak : Jalan merupakan bagian dari transportasi darat yang berfungsi menghubungkan satu daerah dengan daerah lainnya. Jalan merupakan komponen penting dalam pembangunan maupun perekonomian, sehingga kualitas jalan pada suatu tempat dapat menentukan keberlanjutan proses pembangunan maupun keberlangsungan roda perekonomian. Kualitas jalan sangat dipengaruhi oleh lapisan perkerasan yang membentuk struktur jalan tersebut. Salah satu lapisan yang seringkali menyebabkan kerusakan jalan adalah lapisan tanah dasar. Sebagai tanah dasar, maka tanah harus memiliki daya dukung yang cukup dalam menerima beban di atasnya. Tanah dasar umumnya merupakan tanah asli yang terdapat di lokasi proyek, jika tanah dasar tidak memiliki daya dukung yang cukup maka tanah tersebut diganti atau distabilisasi. Berdasarkan penelitian stabilisasi tanah rawa dengan 10 % bubuk keramik dan 10 % bubuk kaca, didapat nilai daya dukung (CBR) sebesar 6 %. Data tersebut akan digunakan sebagai perencanaan tebal perkerasan lentur dengan metode Bina Marga. Berdasarkan hasil analisis didapat tebal lapisan permukaan 7,5 cm, lapisan pondasi atas  20 cm, lapisan pondasi bawah 20 cm dan lapisan tanah dasar 10 cm dengan total biaya Rp 1.374.821.000,00. Total biaya perkerasan lentur rencana dengan tanah terstabilisasi lebih kecil 5,4 % dibandingkan total biaya perkerasan eksisting. Kata kunci : perkerasan lentur, tanah stabilisasi, total biaya. Abstract : Roads are part of land transportation which functions to connect one area to another. The road itself is an important component in development and the economy, so that the quality of roads in one place can determine the sustainability of the development process and the sustainability of the economy. Road quality is strongly influenced by the pavement layer that forms the structure of the road. One layer that often causes road damage is the subgrade layer. As subgrade, the soil must have sufficient carrying capacity to receive the load on it. Baseline is generally the original soil found at the project location, if the subgrade does not have sufficient carrying capacity, the soil is replaced or stabilized. Based on research on the stabilization of swamp soil with 10 % ceramic powder and 10 % glass powder, the value of carrying capacity (CBR) is 6 %. The data will be used as a planning for flexible pavement thickness using the Bina Marga method. Based on the results of the analysis it was found that the surface layer thickness was 7.5 cm, the foundation layer was 20 cm, the foundation layer was below 20 cm and the subsoil layer was 10 cm with a total cost of Rp. 1,374,821,000.00. The total cost of planned flexible pavement with stabilized soil is 5.4 % smaller than the total existing pavement cost. Keywords : flexible pavement, stabilization soil, total cos

TINJAUAN KUAT TEKAN BETON MUTU TINGGI DENGAN PENAMBAHAN TALI TAMBANG PLASTIK

High quality concrete as a construction material more widely used, but the higher of the concrete qualitywill cause ductility properties of concrete decreases. One way to decimate the mechanical properties of highstrength concrete is to provide additional materials in the concrete mix. This study aimed to determine theeffect of plastic rope in the concrete mixture. Technical properties of concrete under review due to theaddition of plastic rope to concrete is compressive strength. The method used in this research is to make a testpiece for later testing compressive strength. The test object is created by the addition of plastic rope along the5 cm, 7 cm and 10 cm as much as 0.5% by weight of coarse aggregate. Specimens were made for eachvariation is 3 pieces and will be tested on the concrete age 7 and 28 days. The planned results in this study isthe high quality concrete compressive strength of 55 MPa at the age of concrete 28 days. From the researchthat at the age of concrete 28 days minimum compressive strength of concrete specimen contained in theconcrete with the addition of 5 cm plastic ropes of 11.75 MPa or 21.36% of the compressive strength ofconcrete plans. The maximum concrete compressive strength at 28 days there on the concrete specimen withthe addition of plastic rope 7 and 10 cm at 12.14 MPa or 22.07% of the compressive strength of concreteplans

Pengaruh Penggunaan Bahan Limbah Polimer Sebagai Campuran Aspal Modifikasi Terhadap Kinerja Marshall

One of the polymer materials that can be a mixture of asphalt is Ethylene Vinyl Acetate, which is a material that is widely used in making toys and making footwear. This large amount of toys and footwear production waste has only become rubbish and has not been utilized optimally. Ethylene Vinyl Acetate polymers themselves belong to elastomeric polymers which have flexible properties such as rubber, smooth, flexible, resistant to low temperatures, are not easily cracked and are resistant to water. The use of polymer material as a mixture of asphalt has been widely carried out considering that asphalt modification with polymeric materials is known from several tests showing that it has better resistance to deformation and overcoming cracks, so that road construction can be produced more durable and can reduce maintenance and repair costs Street. In this study the use of Ethylene Vinyl Acetate waste on asphalt mixes has a pretty good effect, this is seen from the results of marshall tests that can meet the requirements

Revitalisasi Tempat Pembuangan Sampah Sementara Di Perumahan Buana Gardenia Untuk Peningkatan Kesehatan Lingkungan

A comfortable and healthy residential area must be supported by the availability of adequate facilities and infrastructure such as the availability of clean water networks, road networks, drainage systems, worship facilities, green open spaces and temporary garbage storage facilities. The available temporary garbage collection sites must be able to accommodate the volume of waste up to the relevant transportation service schedule. However, sometimes transportation delays can occur, so that it can cause problems in residential areas, especially in Buana Gardenia housing such as unpleasant odors and the flow of water that is blocked due to rubbish that falls into the waterways. Waste that falls into the water channel over time can clog the flow of water in it, other than that due to organic rotting in the water channel can cause sedimentation in the bottom of the channel so that the channel becomes shallow. To anticipate the fall of rubbish into the waterways due to the full volume of waste and delays in transportation from related agencies. In the community service activities at the Buana Gardenia housing complex, a temporary garbage shelter will be revitalized. The revitalization results can reduce the waste that falls into the water channel so that the flow of water in the channel flows smoothly, reducing the number of mosquito larvae and puddle when it rains

PENGARUH PENAMBAHAN SERBUK ARANG CANGKANG SAWIT TERHADAP KUAT GESER LANGSUNG PADA TANAH LEMPUNG

Salah satu jenis tanah berbutir halus adalah tanah lempung yang memiliki sifat kohesi dengan tingkat plastisitas yang rendah sampai dengan tinggi dan daya dukung yang rendah. Tingginya tingkat plastisitas dapat menyebabkan tingginya potensi mengembang tanah lempung. Untuk mengurangi plastisitas dan meningkatkan daya dukung pada tanah lempung  sehingga perlu adanya perbaikan parameternya. Metode perbaikan yang sederhana adalah stabilisasi kimia. Pada penelitian ini digunakan serbuk arang cangkang sawit sebagai bahan stabilisasi tanah lempung. Serbuk arang cangkang sawit yang ditambahkan berdasarkan berat kering tanah bervariasi mulai 5%, 10% dan 15%. Penambahan serbuk arang cangkang sawit tersebut bertujuan untuk mengetahui pengaruhnya terhadap plastisitas dan parameter kuat geser tanah lempung. Hasil pengujian di laboratorium didapatkan tingkat plastisitas tanah lempung menurun seiring dengan penambahan serbuk arang cangkang sawit. Sedangkan untuk parameter kuat geser diketahui bahwa nilai kohesi mencapai nilai optimum dengan variasi penambahan serbuk arang cangkang sawit 10% dengan nilai sebesar 44,04 kPa. Namun hal tersebut tidak berlaku dengan nilai sudut geser dalam yang semakin lama semakin meningkat seiring dengan bertambahnya serbuk arang cangkang sawit. Penambahan serbuk arang cangkang sawit pada tanah lempung dapat menyebabkan hilangnya sifat kohesif dan tanah lempung menjadi lebih berbutir

Pengaruh Penambahan Serbuk Kaca Dan Abu Sekam Pada Tanah Lunak Berdasarkan Uji Konsolidasi

It can not be avoided when the construction must stand on soft soil, then the construction will suffer damage due to subsidence or congestion from soft soil. To improve soft soils as one part of the construction of them is the method of chemical stabilization of the soil. The stabilizer material mixed was 10% glass powder and the percentage of husk ash was 0%, 2.5%, 5%, 7.5% and 10% of the dry weight of the original soil sample. Changes in the characteristics of soft soil and stabilized soils are reviewed based on the consolidation test. Based on the results of the study, the value of the void ratio decreases with increasing glass dust and husk ash, where the lowest void ratio is 0.5328 obtained in the addition of 10% glass powder and 7.5% husk ash. A decrease in the void ratio indicates a decrease in the compression index (Cc) and the swelling index (Cs). The lowering of the compression index and the swelling index indicate that the addition of glass powder and husk ash causes the soft soil sample to become denser. The lowest compressive index and swelling index values ​​were obtained in soil sample specimens with the addition of 10% glass powder and 10% husk ash, which respectively decreased by 35.165% and 75.757% when compared to the condition of the original soil sample

An Overview of Commonly Used Steel Beam-Column Connection in Indonesia for Low-Rise Building

The Indonesian seismic provision for steel structures was initiated in 2002. The use of steel has also been increasing as a choice of structural material since then. However, there are still many weaknesses in the seismic design of steel structures that have been carried out so far. A lot of beam-column connections in steel buildings in Indonesia use a haunch in a moment-resisting connection system. Haunched systems are not described in AISC 358 as permitted connections for earthquake-resistant buildings. Recently, Europe publishes European Prequalified Steel Joints (EqualJoints). There are four types of connections discussed, and one of them is the haunched type connections. The haunched connection meets the seismic requirements to be suitable for use as an earthquake-resistant connection in Europe. This can be used as a reference if we are going to design a haunched connection in Indonesia. However, special attention should be paid to the details. The bolt configuration, the thickness of the end plates, and the shape of the haunch are not like those commonly used in Indonesia, there must be improvements to be adjusted in EqualJoints. So that the performance of the connection against earthquakes becomes more guaranteed