Investigation of approach slab settlement for highway infrastructure

Yasrobi, Seyed Yashar; Ng, Kam; Edgar, Thomas V.; Menghini, Michael

doi:10.1016/j.trgeo.2015.12.002

Cited by 23 publications

(7 citation statements)

References 2 publications

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“…The grade beams typically rest on driven piles to support the approach slab and prevent any substantial differential settlements caused by the thermal cycles transformed into the backfill. According to a recent nationwide survey ( 13 ), Nebraska reported a low percentage (0%–25%) of bridges that experience problems with approach slab settlement.…”

Section: Filed Instrumentationmentioning

confidence: 99%

Field Monitoring and Analysis of Abutment Foundation Behavior for a Curved Integral Abutment Bridge under Thermal Loading

Alhowaidi

Eun

Kim

et al. 2023

Transportation Research Record: Journal of the Transportation R

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The construction of integral abutment bridges (IABs), including semi-IABs, has increased substantially in the past two decades, partly because of reduced construction and maintenance costs. However, temperature-driven lateral movements, associated with the elimination of expansion joints, lead to a complex interaction between the bridge structure and the soils behind and under the abutment, which could result in soil densification, void formation, and settlement in the approach slab. The bridge's structure, geometry, and location all play an essential role in how the IAB responds to those movements. In addition, if the IAB is curved, it brings more complexity to its behavior. Nonetheless, there has been very little research on the behavior of curved IABs to date. This study investigates the behavior of a newly constructed curved IAB via field monitoring and numerical simulation. Field measurements included the backfill pressure, horizontal translation, and rotation imposed on the abutments during seasonal thermal fluctuations. The abutments rotate and translate toward backfill in summer and away from it in winter because of thermal expansion and contraction of the superstructure. Such thermal movements contributed to the increase in the lateral pressure to 85 kPa in the first year and to 140 kPa in the second year of monitoring. This implies that irreversible deformation may occur during seasonal temperature changes, supported by the monitored displacements. The bridge curvature, different skew angles at both ends, and the abutment geometry resulted in different movements and backfill pressures at each corner. A numerical simulation is also performed to provide more insights into the behavior of the curved IAB with more seasonal temperature cycles.

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Section: Filed Instrumentationmentioning

confidence: 99%

Field Monitoring and Analysis of Abutment Foundation Behavior for a Curved Integral Abutment Bridge under Thermal Loading

Alhowaidi

Eun

Kim

et al. 2023

Transportation Research Record: Journal of the Transportation R

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“…The study uses the concept of multi-source information method in geotechnical model monitoring, conventional monitoring techniques, and SInSAR monitoring. Yasrobi, S. Y. et al (2016) investigated the settlement of the relief floor at the transition from the road to the bridge in the United States [13]. A total of 34 responses from 31 states were obtained from this survey, with some states providing multiple responses and only a few reasonable responses were selected for the analysis.…”

Section: Introductionmentioning

confidence: 99%

Soft ground improvement below bridge approach foundation using cement deep mixing columns combined with geotextile

Anh

Ngoc

2023

J Appl Eng Science

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Vehicle load is a dynamic load and embankment load is a static load. These two load types can act simultaneously to accelerate the consolidation rate of the ground under the embankment, which then leads to differential settlement. This differential settlement is dangerous as it can cause sudden bouncing and shock for vehicles on the road. There are also other problems such as the reduction in the exploitation capacity of the construction work due to the reduction in the speed of vehicles going through the positions of settlement. Lower speed increases the waste of means of transport. Excessive settlement can occur from reasons such as improper design or improper construction. This paper uses the finite element method to simulate the construction process of the bridge approach to calculate, and check the stability and deformation of the soft ground under this road. The analysis results show that the settlement of the ground without treatment is quite large at 1.06 m. After reinforcement, the settlement is 0.013 m, and the stability coefficient increases from 1.032 to 2.739. The research results can be applied to reinforce the bridge approach with a system of cement deep mixing (CDM) columns combined with geotextiles to shorten the construction time and limit settlement compensation.

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“…How to effectively solve the problem of settlement difference and ensure driving stability is of great significance [4] and has become a major problem in engineering construction [7]. At present, there are many methods to solve the settlement difference problem in China and abroad, such as using bridge end transition slab [8], i.e., connecting bridge abutment with roadbed through reinforced concrete slab [9], improving the degree of density of roadbed and reducing deformation by using civil engineering material with reinforced bars and loading preload, increasing rigidity of foundation by piling, and filling foundation with lightweight materials. Greco et al [10] regarded vehicle and bridge as an integrated system based on moving mesh strategy and analyzed the moving load of vehicle and bridge interaction using finite element model.…”

Section: Introductionmentioning

confidence: 99%

Analysis of mechanical properties of transition segment of road and bridge based on high-strength foam concrete

Cao

2019

Frattura Ed Integrità Strutturale

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The settlement difference in the transition section of road and bridge may lead to traffic accidents, which has many negative effects. Back filling of foam concrete behind abutment is a good method of treatment. In this study, a kind of high-strength foam concrete was designed for back filling of transition section of road and bridge, and the mechanical properties of the transition section of road and bridge were analyzed using finite element analysis method. It was found that only a large number of micro cracks grew in high-strength concrete under a large number of load cycles, and structural damage did not happen, indicating the high-strength foam concrete had high strength and long service life; the static base pressure was about 40 kPa, indicating a small burden on the structure. Under the vehicle load, the vertical displacement of the transition section of road and bridge with back filling of high-strength foam concrete behind abutment was about 0.7 m and the maximum vertical stress was about-40 kPa, which was significantly lower than that of the ordinary concrete, and the stability was favourable and the settlement was small, indicating that the high-strength foam concrete had good vibration absorption effect. The analysis results verifies the value of the high-strength foam concrete as the backfill material of the transition section of road and bridge and proves that it can effectively solve the problem of differential settlement of the transition segment of road and bridge, providing some theoretical bases for its application and popularization.

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Investigation of approach slab settlement for highway infrastructure

Cited by 23 publications

References 2 publications

Field Monitoring and Analysis of Abutment Foundation Behavior for a Curved Integral Abutment Bridge under Thermal Loading

Field Monitoring and Analysis of Abutment Foundation Behavior for a Curved Integral Abutment Bridge under Thermal Loading

Soft ground improvement below bridge approach foundation using cement deep mixing columns combined with geotextile

Analysis of mechanical properties of transition segment of road and bridge based on high-strength foam concrete

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