Study And Analysis Of Rub By Box Pushing Technique Using Ansys Software

• Author(s):

  Shravya Shetty | prof. Abhijeet Undre | Dr. Atul Pujari

• Keywords:

  Road Under Bridge, Box Pushing Technique, RCC Box, ANSYS, Soil-Structure Interaction, Hydraulic Jacking, Trenchless Construction, Settlement Control

• Abstract:

  Road Under Bridges (RUBs) Are Critical Infrastructure For Improving Traffic Safety And Continuity, Particularly Where Level Crossings Disrupt Smooth Flow Of Rail Or Road Traffic. Conventional Open-cut Construction Of RUBs Often Causes Significant Traffic Disruption, Temporary Embankment Instability, And High Construction Costs. The Box Pushing Technique Offers A Trenchless Alternative, Wherein A Reinforced Concrete (RCC) Box Is Fabricated Adjacent To The Embankment And Hydraulically Pushed Through The Soil While Excavation Is Performed At The Leading Face. This Method Minimizes Surface Disturbance And Allows Traffic To Remain Operational During Construction. The Present Study Evaluates The Structural Behavior And Construction Feasibility Of A Single-cell RCC Box (6.0 M × 4.5 M Clear Opening) Using ANSYS Finite Element Analysis. Detailed Engineering Calculations, Including Hydraulic Jack Capacity, Soil-structure Interaction, Earth And Surcharge Loads, And Lateral Pressures, Were Incorporated Into The Model. Simulation Results Indicate A Maximum Equivalent Stress Of 18.7 MPa, Well Below The M35 Concrete Compressive Strength, And Total Deformation Ranging From 1.8 Mm To 4.6 Mm, With Vertical Deflection Dominating Due To Soil Cover And Live Load Surcharge. The Required Installed Jacking Capacity Of 12,000 KN Ensures Safe And Controlled Advancement Of The Box, Accounting For Base Friction (6,693 KN) And Face Resistance (1,800 KN). Safety Evaluation Confirms A Factor Of Safety Of 1.5, Validating The Design Under Both Construction-stage And Service-stage Loads. The Study Demonstrates That The Box Pushing Technique, Combined With FEM Analysis, Allows Efficient, Safe, And Minimally Disruptive RUB Construction. Recommendations Include Careful Jack Alignment, Staged Excavation, And Monitoring Of Settlement And Stress To Optimize Safety And Performance In Urban And Railway Environments.

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Other Details

• Paper id:

  IJSARTV12I5105361

• Published in:

  Volume: 12 Issue: 5 May 2026

• Publication Date:

  2026-05-14

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