Study of non-uniform bedding due to voids under jointed PVC water distribution pipes

Balkaya, Müge; Moore, Ian D.; Sağlamer, Ahmet

doi:10.1016/j.geotexmem.2012.01.003

Cited by 61 publications

(13 citation statements)

References 16 publications

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“…Sewer pipes deteriorate with time, resulting in cracks, fractures and openings that allow soil in the vicinity to migrate into the pipe during ground water infiltration and instantaneous sewer exfiltration processes (Bertrand-Krajewski et al 2006;Cardoso et al 2006;Meguid and Dang 2009;Karpf et al 2011). The continuation of this process over a prolonged period forms a cavity around the defect with an associated low-strength zone, which propagates towards the ground surface with groundwater fluctuation, finally causing a sinkhole (Zheng 2007;Balkaya et al 2012;Guo et al 2013). Sinkholes represent a substantial economic loss,…”

Section: Introductionmentioning

confidence: 99%

“…as they can initiate a series of catastrophic events including interruption to buried service lines (water, cable, electric, gasoline, and telephone), disruption to traffic, contamination of nearby natural water bodies by sewer overflow, sewer overflow in residences upstream, damage to highway profiles and sometimes human fatalities (Galve et al 2012). Furthermore, soil erosion from the vicinity of the pipe causes a loss of support from the surrounding soil to the pipe, which may completely lose its structural integrity and break (Abraham and Wirahadikusumah 1999;Moore 2008;Balkaya et al 2012). In addition, soil and ground water flow into sewer pipes through defects increases the operating cost of wastewater treatment and pumping stations, especially in rainy seasons.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of defective sewer pipe–induced internal erosion and associated ground deformation using laboratory model test

2017

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Sinkholes induced by long-term internal erosion around defective sewer pipes have been widely reported. There is a need for an efficient method to understand the influence of pipe defects on internal erosion and ground settlement. This paper presents an approach to the investigation of erosion-induced ground settlement and the susceptibility of pipe bedding materials to internal erosion. A new and efficient erosion test apparatus is introduced, aided by controlling most of the key influencing parameters. The corresponding ground displacement is tracked by image correlation based on particle image velocimetry (PIV). The basic parameters investigated are (i) the process of cavity initiation and evolution, (ii) the rate of soil loss, (iii) the gradation of eroded soil, and (iv) the corresponding ground displacement. The results indicate that particles less than 0.3 mm are highly vulnerable to erosion through 5 mm openings of embedment material with a maximum particle size of 4.75 mm. The proposed method is beneficial, as it allows measurement of the deformation at any time and at any location throughout the test and facilitates checking the resistance to erosion of pipe embedment materials.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evaluation of defective sewer pipe–induced internal erosion and associated ground deformation using laboratory model test

2017

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“…Due to the significantly weakened bending moment transmission in this kind of flexible-jointed pipeline, the mechanical behaviour of the joints is best simplified as that of a hinge [2]. It should be noted that experimentation has indicated that the behaviour of a nodal pipeline is more complex than encompassed by the hinge model [20,21]. For example, a hinge can limit the axial translation and translation axial stress of the jointed pipeline, which may not accord with the actual situation.…”

Section: Calculation Methods and Validationmentioning

confidence: 99%

Estimating the Effects of Tunnelling on Preexisting Jointed Pipelines

Shao

Duan

Liu

et al. 2019

Advances in Civil Engineering

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Tunnel excavation inevitably results in ground movements and changes in soil stress, leading to additional stress on and settlement of nearby buried pipelines. This article focuses on the response of jointed pipelines to twin tunnelling. The relationship between the relative pipe-soil displacement and the relative pipe-soil stiffness was first determined. Based on this analysis, a series of numerical parametric studies encompassing 7776 conditions were performed to investigate the responses of a jointed pipeline to twin tunnelling. The results are used to estimate a regression equation for the relationship between the relative pipe-soil stiffness and the normalized maximum joint rotation angle. This equation can be used for the direct calculation of the maximum joint rotation angle that will result from single or twin tunnelling and for the assessment of the tunnelling-induced risk to jointed pipelines. The applicability and reliability of the regression equation are validated by comparing the calculated values with the results of earlier centrifuge tests.

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“…The results from the analyses revealed that the friction coefficient affects the stiffness of the joint and that increased gasket modulus leads to increased insertion force and bending moment. In a later publication (Balkaya, Moore, & Sa glamer, 2012), the same model was studied in order to test the bell and spigotjointed PVC water pipes that lie on non-uniform bedding, which was simulated by voids of different sizes. The conclusions derived by FEM included higher deformations in the case of improper bedding under the joint and lower deformations in the case of stiffer soils around the pipes.…”

Section: Elastomeric Jointsmentioning

confidence: 99%

A review on the durability of PVC sewer pipes: research vs. practice

Makris

Langeveld

Clemens

2019

Structure and Infrastructure Engineering

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Polyvinyl chloride (PVC) has become one of the dominant construction materials for sewer systems over the past decades, as a result of its reputed merits. However, since PVC sewer pipes have operated for decades in a hostile environment, concern over their longevity has been lately raised by sewer managers in the Netherlands. Towards that direction, the main factors and mechanisms that affect a PVC pipe's lifetime are discussed in this article, along with the current lifetime prediction methods and their limitations. The review of relevant case studies indicates that material degradation, if any, occurs slowly. However, inspection (CCTV) data of three Dutch municipalities reveals that severe defects have already surfaced and degradation evolves at an unexpected fast rate. A main reason of this gap between literature and practice is the fact that comprehensive material testing of PVC sewer pipes is rarely found in the literature although it proves to be essential in order to trustfully assess the level of degradation and its origins.

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Study of non-uniform bedding due to voids under jointed PVC water distribution pipes

Cited by 61 publications

References 16 publications

Evaluation of defective sewer pipe–induced internal erosion and associated ground deformation using laboratory model test

Evaluation of defective sewer pipe–induced internal erosion and associated ground deformation using laboratory model test

Estimating the Effects of Tunnelling on Preexisting Jointed Pipelines

A review on the durability of PVC sewer pipes: research vs. practice

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