scholarly journals PLANNING TO REPAIR THE APPROACH SLABS BRIDGE MUARA TABIRAI, RANTAU – KANDANGAN

CERUCUK ◽  
2021 ◽  
Vol 5 (1) ◽  
pp. 41
Author(s):  
Ade Nafis Prawira
Keyword(s):  
Economic Growth ◽  
Retaining Wall ◽  
Soil Reinforcement ◽  
Traffic Load ◽  
Sheet Pile ◽  
Improvement Project ◽  
Approach Slabs ◽  
Vertical Drain ◽  
Prefabricated Vertical Drain ◽  
Land Improvement

Muara Tabirai Bridge is on the border between Rantau and Kandangan District ,which is precisely is on the street of Kalumpang-Margasari, the village of Paci, Kalumpang subdistrict. Increasing economic growth has led to the economy of the population being affected by the development of the city, gradually increasing in economic sectors as a result of global economic growth. The increase in this economy is due to the growing industry in the area. This is accompanied by the increase and needs of the population in the area that resides in the region. Unfortunately, after one year of construction of Muara Tabirai Bridge, the approach slabs bridge in the direction Kandangan on the right side suffered a decrease in the soil to damage the asphalt, due to the possibility of a landslide on the side of the road, then the implementers make alternative repairs by using a bronjong which makes the load heavier than before so that the ground that supports the burden of the heap, bronjong and traffic load can not withstand and So in this final task is done repair on the ground soil and design a retaining wall that is more suitable for the condition of the landThe basic soil repair method used is by a phased heap (Preloading) combined with the Prefabricated Vertical Drain (PVD) ,which serves as a water and air release on the soil, thus experiencing a consolidated degree of 90%. And for retaining wall against the side of the heap is used sheet pile with the type of free-standing ,which is suitable for the location of the pile located in the river. After that, the calculation of budget plan (RAB) on the Land, improvement Project,From the result of calculation obtained, a gradual heap (Preloading) carried out 0.2 m/week ,and ,a high critical heap (HCR) obtained on the high end of the plan (HR) 3.14 m obtained a security figure (SF) of 1.148 so that the heap used the soil reinforcement that is Mini pile erection so that the safety number (SF) reaches more than equal to 1.5 Prefabricated Vertical Drain (PVD) is used specification of the product PT. Teknindo Superior System installed when before done the filling is on the ground ground, planning Prefabricated Vertical Drain (PVD) using a triangular mounting pattern with a distance between PVD 1.25 m, depth 28 m and the time required is 21 weeks. Planning of soil retaining structure used is cantilever sheet pile type, obtained a total length of sheet pile of 20.938 m at STA 0 + 275 on the left and right side of the bridge. The budget plan for this basic land improvement project is Rp. 30,886,527,167

CASE-BASED REASONING PEMILIHAN METODE KONSTRUKSI JALAN DI ATAS TANAH BERMASALAH KEDALAMAN 10 SAMPAI DENGAN 20 METER

2020 ◽  
Vol 6 (2) ◽  
pp. 77-89
Author(s):  
Maulana Iqbal ◽  
Anton Soekiman
Keyword(s):  
Soil Improvement ◽  
Soil Reinforcement ◽  
Case Based Reasoning ◽  
Vacuum Preloading ◽  
Horizontal Drain ◽  
Vertical Drain ◽  
Prefabricated Vertical Drain ◽  
Case Based ◽  
Problematic Soil

Permasalahan konstruksi jalan di atas tanah bermasalah (problematic soil) tanpa adanya perbaikan  tanah (soil improvement) maupun perkuatan tanah (soil reinforcement), pada umumnya akan mengakibatkan instabilitas timbunan dan penurunan tanah dasar. Tidak sedikit jaringan jalan di atas tanah dasar bermasalah di beberapa area di Indonesia mengalami penurunan tingkat pelayanan yang drastis sebelum umur rencana. Kurangnya pemahaman karakteristik tanah dasar menyebabkan pemilihan metode konstruksi tidak efektif dan efisien. Kecenderungan pemilihan metode yang digunakan masih didasari ketersediaan pagu anggaran. Pemilihan metode konstruksi jalan di atas tanah dasar bermasalah dengan analisis Case-Based Reasoning (CBR), dapat menghemat waktu dalam pengambilan keputusan berdasarkan keahlian pakar, sehingga risiko ketidakakuratan pemilihan metode berakibat pada keputusan penanganan yang kurang tepat dapat diminimalisir. Berdasarkan hasil analisis dengan mengambil studi kasus tol Pemalang – Batang pada kedalaman tanah bermasalah antara 10 sampai dengan 20 meter dan menggunakan analisis CBR, didapatkan  gejala kecocokan (similarity) sebesar 97,74% pada metode Prefabricated Vertical Drain (PVD) yang dikombinasikan dengan metode pembebanan dengan vakum (vacuum preloading) dan Prefabricated Horizontal Drain (PHD).

scholarly journals PENYUSUNAN PROJECT PLANNING PERBAIKAN TANAH LUNAK DENGAN PREFABRICATED VERTICAL DRAIN (STUDI KASUS PADA AREA LONG BEACH PAKUWON CITY-SURABAYA)

2013 ◽  
Vol 7 (2) ◽  
pp. 177
Author(s):  
Muhammad Amin Fahmi
Keyword(s):  
Traffic Management ◽  
Program Planning ◽  
Soft Clay ◽  
Project Planning ◽  
Project Cost ◽  
Improvement Project ◽  
Vertical Drain ◽  
Prefabricated Vertical Drain ◽  
Cost Planning ◽  
Implementation Method

The improvement project was carried out within 30 work days with the project price of IDR 551.439.500,-. In the project management a project planning is in need a carry out the project on time at precise cost and quality. The data needed in this arrangement of project planning were contract documents, list of work force cost, equipment and materials used. Work scheduling and cost arrangement for the project was done with benefit of Microsoft Project Program. The writer discusses the determination of project site layout, traffic management, implementation method, project time schedule, project cost planning, project quality management planning as well as K3 program planning. From the calculating result, the writer summed that the total cost was Rp. 270.950.000.-. When this sum compared to the previous project cost planning was Rp. 551.439.500,- we can difference as much as Rp. 280.489.500.-. In order to assure the working quality, material testing was conducted in laboratory so that the material mounted matched the technical qualifications as well as the use if correct implementation method. To avoid work accident, every worker must use the Self Protection Device and work carefully by the correct working procedures. Keywords:  Vertical Drain, Soft Clay, Project Planning

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 Analysis of Dynamic Coupling Characteristics of the Slope Reinforced by Sheet Pile Wall

2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
H. L. Qu ◽  
H. Luo ◽  
L. Liu ◽  
Y. Liu
Keyword(s):  
Slip Surface ◽  
Retaining Wall ◽  
Time History ◽  
Interaction Force ◽  
Body Parts ◽  
Sheet Pile ◽  
Stabilizing Piles ◽  
The Difference ◽  
Coupling Characteristics ◽  
Sheet Pile Wall

Large deformation of slope caused by earthquake can lead to the loss of stability of slope and its retaining structures. At present, there have been some research achievements about the slope reinforcement of stabilizing piles. However, due to the complexity of the structural system, the coupling relationship between soil and pile is still not well understood. Hence it is of great necessity to study its dynamic characteristics further. In view of this, a numerical model was established by FLAC3D in this paper, and the deformation and stress nephogram of sheet pile wall in peak ground motion acceleration (PGA) at 0.1 g, 0.2 g, and 0.4 g were obtained. Through the analysis, some conclusions were obtained. Firstly, based on the nephogram of motion characteristics and the positions of the slip surface and the retaining wall, the reinforced slope can be divided into 6 sections approximatively, namely, the sliding body parts of A, B, C, D, and E and the bedrock part F. Secondly, the deformation and stress distributions of slope reinforced by sheet pile wall were carefully studied. Based on the results of deformation calculation from time history analysis, the interaction force between structure and soil can be estimated by the difference of peak horizontal displacements, and the structure-soil coupling law under earthquake can be studied by this approach.

scholarly journals Numerical Modelling of Structures Adjacent to Retaining Walls Subjected to Earthquake Loading

Geosciences ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 486
Author(s):  
Xiaoyu Guan ◽  
Gopal S. P. Madabhushi
Keyword(s):  
Finite Element ◽  
Dynamic Behaviour ◽  
Retaining Wall ◽  
Free Field ◽  
Retaining Walls ◽  
Earthquake Loading ◽  
Bending Moments ◽  
Sheet Pile ◽  
Novel Approach ◽  
Active Zones

In an urban environment, it is often necessary to locate structures close to existing retaining walls due to congestion in space. When such structures are in seismically active zones, the dynamic loading attracted by the retaining wall can increase. In a novel approach taken in this paper, finite element-based numerical analyses are presented for the case of a flexible, cantilever sheet pile wall with and without a structure on the backfill side. This enables a direct comparison of the influence exerted by the structure on the dynamic behaviour of the retaining wall. In this paper, the initial static bending moments and horizontal stresses prior to application of any earthquake loading are compared to Coulomb’s theory. The dynamic behaviour of the retaining wall is compared in terms of wall-top accelerations and bending moments for different earthquake loadings. The dynamic structural rotation induced by the differential settlements of the foundations is presented. The accelerations generated in the soil body are considered in three zones, i.e., the free field, the active and the passive zones. The differences caused by the presence of the structure are highlighted. Finally, the distribution of horizontal soil pressures generated by the earthquake loading behind the wall, and in front of the wall is compared to the traditional Mononobe-Okabe type analytical solutions.

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.

Sign in / Sign up

Export Citation Format

Share Document