ANALISIS GROUND VIBRATION DENGAN METODE PEAK PARTICLE VELOCITY (PPV)

<p><em>Measurement of Peak Particle Velocity (PPV) mm / sec in the Sabo dam construction project was carried out using seismic accelerometers. This study is to determine the value of PPV produced by construction equipment and then compared with the BS 6472-2: 2008 standard. The measurement method is carried out based on the applicable rules. PPV measurement results produced by each machine are different. In heavy equipment dump trucks, excavators, and front end loaders show PPV values at distances of 50 m, 100 m, 150 m and 200 m under safe conditions referring to the standard which is still in the range of 0.2 - 0.4 mm / sec. while for the pile driving device, demolition, vibrator pile driver at a distance of 50 meters are in unsafe conditions, because more than the range of 0.2 - 0.4 mm / sec, but at a distance of 100, 150, and 200 m PPV values are at safe condition</em></p><p><em><br /></em></p><p>Key words<strong>: </strong><em>PPV, Ground Vibration, Dam sabo</em></p><p><strong> </strong></p><p><em><br /></em></p>

KOMPARASI BIAYA DAN WAKTU PEKERJAAN TIANG PANCANG METODE HYDRAULIC STATIC PILE DRIVER DENGAN DROP HAMMER

<p class="abstract">Kondisi tanah di Indonesia memiliki berbagai macam jenis tanah untuk tiap wilayahnya, keanekaragaman itu menjadikan setiap wilayah memiliki sifat-sifat tanah yang berbeda dan daya dukung tanah yang berbeda. Sifat tanah dan daya dukung tanah sangat mempengaruhi dalam dunia konstruksi karena fungsi tanah sebagai pendukung fondasi dari sebuah bangunan. Fondasi merupakan bagian dari konstruksi bangunan yang penting karena berfungsi untuk meneruskan beban yang disalurkan dari stuktur atas ke tanah dasar. Fondasi yang digunakan pada proyek pembangunan Gedung Pusat Penelitian, Pendidikan, Dan Kebudayaan Pp Muhammadiyah Yogyakarta adalah fondasi tiang pancang. Tiang pancang saat ini banyak di Indonesia sebagai fondasi dalam bangunan struktur seperti jembatan, gedung bertingkat, pabrik , menara, dermaga, metode pelakasanaan tiang pancang terdapat beberapa metode. Perlu dilakukan komparasi dari segi biaya dan waktu untuk menjadi pertimbangan dalam perencanaan sebuah proyek dari komparasi tersebut diharapkan penentuan metode pancang dapat tepat sesuai dengan kondisi pada daerah proyek tersebut akan dibangun. Hasil dari penelitian ini Total semua biaya untuk metode <em>Hydraulic Static Pile Driver</em> adalah Rp.174.842.411,97 dan untuk metode <em>Drop hammer </em>adalah Rp.103.463.026,27 dengan selisih antara kedua metode tersebut adalah Rp.71.379.385,70. Total waktu pemancangan yang dibutuhkan pada alat <em>Hydraulic Static Pile Driver</em> membutuhkan waktu 56 jam sedangkan untuk alat <em>Drop hammer </em>membutuhkan waktu 119 jam selisih waktu antara keduanya adalah 63 jam.</p>

Deterministic Modelling of Hydraulic Static Pile Driver Productivity for Rectangular and Triangular Shaped Piles in Silty Soil

Various piles driving equipment can be used for piling in building projects. In densely populated urban area, more environmentally friendly pile driving equipment, such as hydraulic static pile driver (HSPD) is therefore needed. There are important factors influence the HSPD productivity that are implied in treatment of pile in soil, such as soil type, driven pile size, piling depth, and cycle time. While some methods are available to estimate construction productivity, each method has limitations, such as unreliable prediction and difficult implementation. In present research, HSPD productivity in construction project has been estimated by deterministic modelling, so produced the chart model of HSPD productivity of rectangular and triangular shaped piles in silty soil. Data were collected through site observation from five building projects in three cities of Indonesia, i.e. Semarang, Pati, and Solo. A deterministic model has been designed utilizing data of 180 piling points from the five projects and simulation, so was obtained the chart model of HSPD productivity. Validation of the outputs of the model shows a valid result with an average validity value of 95.6% and standard deviation of 3.3%. Sensitivity analysis of these outputs shows an average sensitivity value of 88.25%. The productivity chart is valuable to plan and to estimate time related to the use of HSPD in construction projects

Strength characteristics of fiber-reinforced light shotcrete

The article presents the regularities of the flexural and compressive strength variation, as well as the energy intensity of destruction of light heat-shielding vermiculite concrete, depending on the content of polypropylene or basalt fiber. The paper stresses that the greatest increase in flexural strength of 40% is observed at the polypropylene or basalt fiber that the greatest increase in flexural strength of 40% is observed at the polypropylene or basalt fiber of 2 and 2-4% respectively. As the basalt fiber content increases from 1 to 4%, the compressive strength increases from 42 to 83%. The resistance of vermiculite concrete to dynamic bending loads when the polypropylene fiber ranges from 0.5 to 2% by a factor of 2.5 4.2. With basalt fiber content of 1 to 4% the energy intensity of destruction increases 1.5 2.5 times.Specific energy intensity of destruction of samples reinforced with basalt fiber increases by 2.3 ÷ 2.7 times during volumetric destruction of the specimens under study on a vertical pile driver. The regularities obtained in the course of the studies indicate that fiber reinforcement of light heat-shielding vermiculite concrete increase its strength characteristics and thereby expand the scope of its application.

Kinerja Alat Hydraulic Static Pile Driver (HSPD) Pada Proyek Perluasan Terminal Bandara Sultan Thaha Jambi

Salah satu alat yang umumnya dipakai pada proyek untuk bangunan tinggi adalah alat pancang untuk pengerjaan pondasi. Dengan keadaan proyek yang berada ditengah-tengah pemukiman penduduk lainnya, maka alat pancang yang sering digunakan dalam situasi ini adalah hydraulic static pile driver (HSPD). Kelebihan alat ini antara lain gangguan terhadap lingkungan dapat diminimalkan karena tidak menimbulkan getaran dan kebisingan. Konstruksi pondasi dalam (deep foundation) mempunyai struktur yang sangat kompleks dibandingkan dengan konstruksi pondasi dangkal (shallow foundation). Metode konstruksinya memiliki penampilan yang lebih rumit atau memiliki banyak keterkaitan dengan bagian-bagian lainnya. Salah satu jenis alat pancang yang sering digunakan adalah jenis hydraulic static pile driver (HSPD).

Efektifitas Penggunaan Alat Hydraulic Static Pile Driver (HSPD) pada Pemancangan

The rapid development of construction projects in Indonesia is directly proportional to the tools created and developed to assist and facilitate activities in the work. The tools no longer fully use human power but humans are only a part of the process of operating the tool. Limited land in the city of Jambi became the main reason in the construction of high-rise buildings. Thus, special technology is needed in order to facilitate the implementation of such development. One of the tools used is the tool for foundation work. Deep foundation construction has a more complex structure compared to shallow foundation construction. Therefore, in the construction of high-rise project, the use of jack in pile is considered very appropriate. One of the advantages of jack in pile is environmental disturbance such as vibration and noise can be minimized. In this research will discuss one type of Jack in Pile that is type Hydraulic Static Pile Driver (HSPD). Where in this case the effectiveness of the use of Hydraulic Static Pile Drivers (HSPD) on the Odua Weston project will be discussed according to the literature and supporting data available.Keywords: Effectiveness of Pollution, HSPD, SWOT Analysis