Soil arching exists in many geotechnical applications, including tunnels, buried pipes, and geosynthetic-reinforced pile-supported (GRPS) embankments. has been mostly investigated using trapdoor tests under soil self-weight and/or uniform surcharge. In real localized surface loading, such as traffic may be applied onto affect or degrade arching. Geosynthetic reinforcement is used GRPS embankments over pipes have effects on mobilization degradation loading. The of loading geosynthetic not yet...

Buried structures (e.g., culverts and pipes under roadways) installed several decades ago are reaching the end of their service life. Excavation replacement these will cause disturbances to transportation network require significant funding. Trenchless techniques sliplining) have been increasingly employed rehabilitate deteriorated buried corroded corrugated steel pipes). Sliplining includes inserting a new pipe (liner) into an existing filling gap between them with grout. The objective this...

To investigate the behavior of laterally loaded piles within mechanically stabilized earth (MSE) walls, reduced-scale physical model tests single MSE walls were conducted inside a test box. Sensors installed in each to monitor responses wall facing and pile during test. The results show that lateral capacity at distance two times diameter behind decreased by 21% as compared with four diameter. well those full-scale field tests. An empirical relationship was developed estimate pile-induced...

A three-dimensional numerical analysis was conducted to evaluate the performance of mechanically stabilized earth (MSE) walls with free-headed piles installed within geosynthetic-reinforced zone subjected lateral loading. The models were first verified available field test results laterally loaded MSE walls. parametric study investigate influence factors on both and piles, including location behind wall facing, diameter stiffness reinforcement layers, length ratio. Load–displacement curves,...

Approach slabs are commonly used to smooth the transition between an integral bridge abutment and its adjacent backfill-supported pavement where differential settlement may exist. This can be aggravated by cyclic movements caused seasonal temperature changes. When backfill surface near is large enough create a void under approach slab, traffic loads on slab transferred end of pavement. Differential also develop at joint due loading. Sleeper geosynthetic-reinforced soil have been proposed...

Bridges supported by abutments on rock or end-bearing piles are not expected to settle. However, sometimes approach embankments bridge settle due underlying compressible soil and/or traffic loading, causing bumps at the ends of bridges resulting from differential settlement between and embankments. Climatic conditions including temperature changes heavy rainfalls may also cause bumps. The seasonal change generates expansion contraction girders, which induce movements in backfill behind...

To reduce construction cost, minimize long-term maintenance of girder beams, and prevent water infiltration-induced erosion problems at expansion joints, integral bridge abutments have been increasingly used in the practice. This type is subjected to passive earth pressures when girders expand high temperatures. When contract low temperatures, backfill materials tend move downward, inducing settlement creating "the bump end bridge" problem. problem becomes progressively worse over time. Some...

Geo-mat system is considered as an alternative to a flexible or rigid pavement that can be used for fire lanes, parking areas, roadway shoulders cars, pickup trucks, utility/delivery and trucks. Also, it reduce the thickness of base course in unpaved roads. In this investigation, six cyclic loading tests were conducted assess efficacy geo-mat on weak intermediate subgrade layers, characterized by California Bearing Ratios (CBR) 2%, 3%, 4%. Control sections, consisting 300-mm thick over...

This paper deals with prediction the effect of soil remoulding (smear) on ultimate bearing capacity driven piles. The proposed method based detecting decrease in pile shaft (excluding share tip) after sliding downward. was done via conducting an experimental study three installed R.C piles a sandy clayey silt soil. were so that gap space is left between its tip and base borehole. tested for according to ASTM D1143 stages. Between each two stages jacked inside borehole until about 200mm...

Corrugated metal pipes (CMPs) buried in the ground for decades may get corroded and lose their structural capacities supporting surface loading, leading to end of service life. Three maintenance options are commonly adopted practice these CMPs: repair, rehabilitate, replace. The option replacement CMPs under roadways through excavation often disrupts traffic requires considerable time budget. Therefore, trenchless rehabilitation methods, such as cement mortar (spray-on) lining, sliplining,...

Some corroded corrugated metal pipes (CMPs) buried under roadways have been reached the end of their service life. Maintenance, which includes excavation and replacement damaged pipes, will disrupt traffic require a considerable cost. Trenchless methods rehabilitation, such as sliplining cement mortar (spray-on) lining, increasingly utilized to repair pipes. However, few studies carried out assess performance rehabilitated In this study, numerical analysis was CMPs with lining methods. The...

Abstract Pile foundations have been increasingly installed within mechanically-stabilized earth walls (MSE) on rocks or compressible soils to support structural loads. Integral abutment bridges, sound walls, and traffic signs are common examples of the structures supported by pile behind MSE walls. These often subjected lateral loads resulting from earthquakes, loads, wind and/or thermal expansion contraction bridge girders. Typical approaches available design limited without present...

Geocell is a three-dimensional cellular geosynthetic, which can be used to confine infill aggregate and stabilize roadway structures over weak subgrade. Although geocells have been increasingly in the field, equivalency of geocell-stabilized base non-stabilized (i.e., control section) terms their performance under static loading has not well established by experimental tests. This paper focuses on comparative analysis same subgrade loading. Four large-scale plate tests were performed with...