scholarly journals Application of Prefabricated Vertical Drain (PVD) for Basic Soil Stabilization in the Railway Double Track Construction Project at Km 437 + 300 to Km 438 + 500 Gombong, Kebumen

2019 ◽  
Vol 3 (1) ◽  
Author(s):  
Ayu Prativi ◽  
Septiana Widi Astuti ◽  
Ahmad Ependi
Keyword(s):  
Land Subsidence ◽  
Soil Stabilization ◽  
Construction Project ◽  
Development Project ◽  
Vertical Drain ◽  
Prefabricated Vertical Drain ◽  
Degree Of Consolidation ◽  
Double Track ◽  
Consolidation Time

The subgrade in the railway double track development project in KM 437 + 300 to KM 438 + 500 Gombong, Kebumen is soft land (N-SPT <15) so that it requires efforts to improve the land to avoid land subsidence exceeding the allowable land subsidence, which is equal to 20cm In this research, an effort to repair subgrade uses Prefabricated Vertical Drain (PVD) to accelerate the process of soil congestion due to the load of the railroad pile, the burden of railroad construction, and the burden of the passing railroad. Compression analysis results show that the subgrade will experience a land subsidence of 0.524m. The natural consolidation time needed to achieve a 90% degree of consolidation is 268.9 years. Meanwhile, the time of consolidation to reach a degree of consolidation of 90% using PVD spaced 0.8 m with a triangle and quadrilateral pattern is for 15 weeks and 18 weeks. Planting PVD in both patterns is as deep as 24 m

scholarly journals APPLICATION OF SUPER BOARD DRAIN (SBD) TO REPLACE THE SAND MAT IN SOFT SOIL TREATMENT BY USING PREFABRICATED VERTICAL DRAIN (PVD) WITH PRELOADING METHOD

2009 ◽  
Vol 12 (18) ◽  
pp. 76-84
Author(s):  
Phan Vo ◽  
Giang Thien Nguyen
Keyword(s):  
New Technology ◽  
Soft Soil ◽  
Construction Project ◽  
Soil Treatment ◽  
Horizontal Drain ◽  
Vertical Drain ◽  
Prefabricated Vertical Drain ◽  
Horizontal Drainage ◽  
Preloading Method ◽  
East West

The report will introduce a new technology using Prefabricated Horizontal Drain (called Super Board Drain -SBD) which is replaced for Sand Mat in soft soil treatment by using Prefabricated Vertical Drain (PVD) with preloading method and sand filled layer (Sand Mat) designed as the horizontal drainage for PVD through East-West Highway Construction Project.

scholarly journals ANALISIS DERAJAT KONSOLIDASI BERDASARKAN HASIL PEMBACAAN PIEZOMETER PADA PROYEK TOL TRANS SUMATERA

2021 ◽  
Vol 4 (2) ◽  
pp. 447
Author(s):  
Aditya Christiandi Sinulingga ◽  
Andryan Suhendra
Keyword(s):  
Theoretical Calculations ◽  
Soft Soil ◽  
Infrastructure Development ◽  
Vacuum Preloading ◽  
Goods And Services ◽  
Toll Road ◽  
Vertical Drain ◽  
Prefabricated Vertical Drain ◽  
Long Time ◽  
Degree Of Consolidation

The development of toll road or expressway infrastructure in Indonesia is urgently needed because it can reduce inefficiencies due to congestion on main sections, as well as to improve the process of distribution of goods and services, especially in areas with high levels of development. Transportation infrastructure development on soft soils often experiences consolidation decline problems. Soft soil has a high moisture content and low bearing capacity. If the soft soil is saturated with water, it means that the water cannot be fully dissipated, causing the soil to take a long time to consolidate. If the construction work does not begin with land improvement, the construction has the potential to suffer damage before the planned age. To anticipate this, an alternative that can be done is to repair the soil with prefabricated vertical drain (PVD) and vacuum preloading. This study aims to determine the degree of consolidation based on the piezometer reading and to make initial predictions. As for the results of this study there is a difference of 5.79% in the degree of assessment from the results of theoretical calculations with the piezometer reading.Pembangunan infrastruktur jalan tol atau jalan bebas hambatan di Indonesia sangat dibutuhkan karena dapat mengurangi inefisiensi akibat kemacetan pada ruas utama, serta untuk meningkatkan proses distribusi barang dan jasa terutama di wilayah yang sudah tinggi tingkat perkembangannya. Pembangunan infrastruktur transportasi pada tanah lunak sering mengalami masalah penurunan konsolidasi. Tanah lunak memiliki kadar air yang tinggi dan daya dukung yang rendah. Jika tanah lunak jenuh air mengakibatkan air tidak dapat terdispasi secara penuh menyebabkan tanah membutuhkan waktu yang lama untuk terkonsolidasi. Apabila pekerjaan konstruksi tidak diawali dengan perbaikan tanah maka konstruksi tersebut berpotensi mengalami kerusakan sebelum umur yang telah direncanakan. Untuk mengantisipasi hal tersebut alternatif yang dapat dilakukan adalah melakukan perbaikan tanah dengan prefabricated vertical drain (PVD) dan vacuum preloading. Penelitian ini bertujuan untuk mengetahui besar derajat konsolidasi berdasarkan pembacaan piezometer serta melakukan prediksi awal. Adapun hasil dari penelitian ini terdapat perbedaan 5,79% derajat konsolidasi dari hasil perhitungan teoritis dengan pembacaan piezometer.

Design charts for vertical drains considering construction time

2001 ◽  
Vol 38 (5) ◽  
pp. 1142-1148 ◽  
Author(s):  
Guofu Zhu ◽  
Jian-Hua Yin
Keyword(s):  
Design Procedure ◽  
Technical Note ◽  
Engineering Properties ◽  
Construction Time ◽  
Vertical Drains ◽  
Vertical Drain ◽  
Design Charts ◽  
Degree Of Consolidation ◽  
Free Strain ◽  
Consolidation Time

This technical note presents design charts for use in determining the required drain spacing explicitly using free strain assumption. The influence of time-dependent loading is incorporated in the design charts. The design procedure is also described. When the radius of vertical drain, required degree of consolidation, time available, and pertinent geotechnical engineering properties of a soil are given, the charts can be used to design a vertical drain system without unnecessary trial and error processes.Key words: consolidation, vertical drain, design charts, time dependence, drainage.

scholarly journals Risk analysis and strategic planning on bridge construction works at the toll road procurement projects in Central Java Province

2018 ◽  
Vol 49 ◽  
pp. 02020
Author(s):  
Hery Suliantoro ◽  
Nurul Fitriani ◽  
Bagus Hario Setiadji
Keyword(s):  
Avoidance Response ◽  
Construction Projects ◽  
Construction Project ◽  
Weather Forecast ◽  
Development Project ◽  
Response Strategy ◽  
Bridge Construction ◽  
Risk Response ◽  
Toll Road ◽  
The Impact

Risk is a condition caused by uncertainty. Risks will occur on any construction project, including bridge construction projects. Efforts that can be taken to minimize the impact of these risks are to engage in risk management activities. This research was conducted on bridge construction work on toll road procurement project in Pejagan-Pemalang, Pemalang-Batang and Salatiga-Kertasura. The purpose of this research is to analyze the risk of bridge development project in toll road project using Risk Breakdown Structure (RBS) method and then the result as database in discussing risk response strategy. The bridge construction project has 36 risks that are divided into six groups: materials and equipment, design, human resources, finance, management, nature and environmental conditions. Bad weather risks are the higest risk and seasonal risk causing temporary work stoppages. This risk-response strategy is avoidance. Short-term avoidance response strategy is to add shift workers, install tents and add additives in the acceleration of the process of maturation of concrete. The long-term avoidance response strategy is to evaluate and rearrange the work schedule by considering the weather forecast report.

scholarly journals ANALISIS PENGGUNAAN PREFABRICATED VERTICAL DRAINS (PVD) PADA TANAH LEMPUNG LUNAK YANG TERDAPAT LAPISAN LENSA

2020 ◽  
Vol 3 (1) ◽  
pp. 119
Author(s):  
Andreyan Prasetio ◽  
Aniek Prihatiningsih
Keyword(s):  
Soft Soil ◽  
Soil Improvement ◽  
Cohesive Soils ◽  
Consolidation Process ◽  
Prefabricated Vertical Drains ◽  
Soil Layers ◽  
Vertical Drains ◽  
Vertical Drain ◽  
Installation Depth ◽  
Consolidation Time

Problem that often occurs in soft cohesive soils is settlement caused by consolidation process. If  construction activities doing when the soils has not been consolidated, settlement can occur. To accelerate  the consolidation process, soil improvement are usually do, one method of soil improvement to accelarate the consolidation process is vertical drain using prefabricated vertical drains (PVD). The soft soil layers in the field are not always continuous, sometimes found soft soil layers that have a lens layer. In this study, will discuss about the settlement and consolidation time of soft  soil layers that have a lens layer which has been improved by PVD with 1 meter distance. Infrastructure that stand on a location that is installed by PVD is taxiway and loading by Airbus A380 aircraft of 18,22ton/m2. Analysis using the 1 dimensional consolidation theory of Terzaghi. For PVD installation to a depth of 50 meters, preloading settlement of 234,80 cm with a consolidation time of  2260 days for the square pattern PVD and 1918 days for triangle pattern PVD. Post loading settlement for PVD installation depth of 50 meters by 2,50 cm. AbstrakMasalah yang sering terjadi pada tanah kohesif dan lunak adalah penurunan yang disebabkan proses konsolidasi. Penurunan dapat menyebabkan keretakan pada struktur konstruksi yang berada di atasnya. Jika suatu kegiatan konstruksi dilakukan saat tanah belum terkonsolidasi, maka konstruksi tersebut dapat mengalami penurunan.. Untuk mempercepat proses konsolidasi biasanya dilakukan perbaikan tanah, salah satu metode perbaikan tanah untuk mempercepat proses konsolidasi yaitu vertical drain dengan menggunakan prefabricated vertical drains (PVD). Lapisan tanah lunak yang terdapat di lapangan tidak selalu kontinu, terkadang ditemukan lapisan tanah lunak yang terdapat lapisan lensa. Pada penelitian ini, penulis akan membahas mengenai waktu konsolidasi yang dibutuhkan oleh lapisan tanah kohesif dan lunak yang terdapat lapisan lensa yang telah diperbaiki dengan menggunakan PVD berjarak 1 meter. Infrastruktur yang berdiri di atas lokasi yang dipasang PVD berupa taxiway dengan beban berupa pesawat Airbus A380 sebesar 18,22 ton/m2. Analisis dilakukan menggunakan teori konsolidasi 1 dimensi Terzaghi. Untuk pemasangan PVD hingga kedalaman 50 meter diperoleh penurunan pra pembebanan sebesar 234,80 cm dengan waktu konsolidasi selama 2260 hari untuk pemasangan PVD pola persegi dan selama 1918 hari untuk pola segitiga . Penurunan pasca pembebanan untuk pemasangan PVD hingga kedalaman 50 meter sebesar 2,5 cm.

scholarly journals Design Method and Verification of Electroosmosis-Vacuum Preloading Method for Sand-Interlayered Soft Foundation

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Yunliang Cui ◽  
Jianbo Tu ◽  
Xinquan Wang ◽  
Hongguo Diao ◽  
Qianru Ge
Keyword(s):  
Design Method ◽  
Simulation Method ◽  
Electrical Circuit ◽  
Test Results ◽  
Vacuum Preloading ◽  
Foundation Treatment ◽  
Vertical Drain ◽  
Soft Foundation ◽  
Prefabricated Vertical Drain ◽  
Preloading Method

The design method of electroosmosis-vacuum preloading for soft foundation treatment is not systematic and complete, thereby restricting the application of the technology in engineering. A design method for the electroosmosis-vacuum preloading treatment of sand-interlayered soft foundation is therefore presented. A compressible electrical prefabricated vertical drain is developed, and a vacuum sealing and draining system is designed for the application of the electroosmosis-vacuum preloading in sand-interlayered soft foundation. Calculation formulas of site resistance considering the interlayer and interface resistivity of the electrode are established to design the power supply and electrical circuit. A simple numerical simulation method is proposed to predict the ground settlement treated by electroosmosis-vacuum preloading. A field test of electroosmosis-vacuum preloading is designed using the suggested method, and comparison tests between the electroosmosis-vacuum preloading and the vacuum preloading are performed to verify the proposed technique. The test results show that the proposed design method is reasonable for the design of electroosmosis-vacuum preloading in engineering.

scholarly journals Numerical Modelling of Prefabricated Vertical Drain for Soft Clay Using ABAQUS

2015 ◽  
Vol 773-774 ◽  
pp. 1502-1507
Author(s):  
Saiful Azhar Ahmad Tajudin ◽  
Mohd Fairus Yusof ◽  
I. Bakar ◽  
Aminaton Marto ◽  
Muhammad Nizam Zakaria ◽  
...  
Keyword(s):  
Pore Water Pressure ◽  
Water Pressure ◽  
Soft Soil ◽  
Soft Clay ◽  
Elastic Model ◽  
Clay Layer ◽  
Soil Consolidation ◽  
Consolidation Process ◽  
Vertical Drain ◽  
Prefabricated Vertical Drain

Construction, buildings and infrastructure founded on soft clays are often affected by settlement problem. Therefore, Prefabricated Vertical Drain (PVD) is one of the best solutions to accelerate soil consolidation by shortening the drainage path. In this study, numerical investigation was carried out to pursue a better understanding of the consolidation behavior of soft clay improved with PVD. The consolidation process accelerated by PVD with surcharge of 50 kPa was analysed using the ABAQUS software by adopting an elastic model. The aim of this study is to compare the settlement and the required time to fully consolidate the soft soil at different drain spacings (1.0 m, 1.5 m and 2.0 m) for two different thickness of the clay layer. The results shows that the time required to completely consolidate the soft soil for 12 m and 20 m thickness of clay layer with different spacings are in the range of 3 months to 66 months. The settlement rate and excess pore water pressure dissipation are increased when the spacing of the drain closer.

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