Numerical simulation of strength failure of buried polyethylene pipe under foundation settlement

Luo, Xiao; Lu, Shunli; Shi, Jianfeng; Li, Xiang; Zheng, Jinyang

doi:10.1016/j.engfailanal.2014.11.014

Cited by 57 publications

(22 citation statements)

References 8 publications

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“…Such composition was also prescribed in [10,14,16,19] as to identify the most common failure causes in sciENcE aNd tEchNology addition to the existing design and construction data, as well as visual physical inspection. Nevertheless random character of failure occurrence makes analysis and assessment in this area very complex and based mainly on the analysis of operational data and implementation of methods and analysis of the failure mechanisms under real conditions as shown in works [9,22,25,32,33].…”

Section: Introductionmentioning

confidence: 99%

Analysis of the gas network failure and failure prediction using the Monte Carlo simulation method

Tchórzewska-Cieślak

Pietrucha-Urbanik

Urbanik

2016

EiN

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Article citation info: IntroductionIn the report of the Committee of Union Gas in the World Congress in Nice in 1972, the issue connected with the failure intensity of the gas network was presented. Operation of Gas Supply System is inseparably linked with the occurrence of the fire and explosion risk. Failures, explosions and fires long-term statistics conducted by the gas services and organizational units of the State Fire Service indicate that despite the continuous increase of the safety level of gas supply system and number of actions taken in this regard, still many failures are recorded, which often generate serious threat for the external and the inner environment of a man, as well as create risk for human health and life. The consequences of failures, during which the release and dispersion of natural gas occurs, depend on its type, nature and causes, as well as from the efficiency of its removal.Failure frequency evaluation in the operation of gas supply subsystem should be one of the priorities of the gasworks, which should attach greater importance to assess the proper functioning of the newly designed, as well as the implemented systems [31]. With the increasing pressure from the environmentalists and stricter standards for acceptable environmental pollution and structures vulnerability in terms of its protection, it seems to be a necessity [6,24,28]. The issue connected with failure gas pipeline analysis in perspective of improper design, construction and maintenance is presented in work [11], the increased failure affected by the lack or improper conduct of repairs and modernization, also incorrect or lack of risk management program. When planning renovations or modernization of gas networks the gasworks employees should make the classification of pipelines, that means determine which sections of the network require immediate repair, and which can be repaired later [7,15,26]. For this reason, making the appropriate maintenance (repair, renovation, replacement) only after the damage of the element may be irrational, control human intervention detects and removes faults being a potential source of failure. Widely used solution become the preventive renewals, aimed at reducing the loss of utility of a given element in different environment [4,8,21]. Very important from operator perspective is the failure reason [18,20,29], as well as modernizing actions that should be taken to avoid such undesirable situations. The strategy of the preventive renewals is to establish such timing of the renewals which will enable to achieve the maximum profitability of the project, through the use of the periodic strategies involving the renewals after a certain period of element operation [5,11]. Such classification can be made, for example, on the basis of failure prediction for certain sections of the gas network, using the Monte Carlo method [30,34]. The Monte Carlo methods include all proceedings aimed at finding approximate solutions of some problems (mathematical, technical or operational) [27]. The Monte Carlo ...

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Section: Introductionmentioning

confidence: 99%

Analysis of the gas network failure and failure prediction using the Monte Carlo simulation method

Tchórzewska-Cieślak

Pietrucha-Urbanik

Urbanik

2016

EiN

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“…66 Nine people are injured with a massive traffic jam. The ground subsidence induced by irregular 67 underground construction causes the destruction of water-supply HDPE pipelines in Shanghai China 68 (Luo 2015). Three types of additional stresses may act on pipes during localized ground subsidence 69 (e.g., Liu level.…”

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confidence: 99%

Laboratory evaluation of buried high-density polyethylene pipes subjected to localized ground subsidence

Zhou

Wang²,

et al. 2018

Acta Geotech.

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Laboratory evaluation of buried high-density polyethylene pipes subjected to Laboratory evaluation of buried high-density polyethylene pipes subjected to localized ground subsidence localized ground subsidence Abstract AbstractThe serviceability loss of buried high-density polyethylene (HDPE) double-wall corrugated pipes caused by localized ground subsidence has been reported all over the world. Beam-on-nonlinear spring model is widely used to analyze the structural responses of buried pipes to the localized ground subsidence underneath the pipe. However, the pipe-soil separation is not considered by the beam-on-nonlinear spring model which assumes bonded interaction between the pipe and soil. This is because the spring stiffness could not be assigned as zero. The bonded interaction between pipe and soil is not able to capture the pipe behavior and characteristics of load distribution around the pipe when pipe-soil separation occurs. This study presents a series of large-scale model tests aiming to investigate the performance of buried HDPE double-wall corrugated pipes subjected to the localized ground subsidence. Movable plates installed at the bottom of the model test box are lowered down to simulate the localized ground subsidence. Earth pressures, pipe vertical displacements, and settlements at the backfill surface are monitored. For comparison purpose, free field condition (i.e., without pipe) is also tested. The test results demonstrate that soil settlement troughs above buried pipes are shallower and wider than those at the same elevation in the free field condition. Earth pressures at the top of the pipe are found to increase due to the negative soil arching, i.e., earth pressure is greater than the overburden pressure. It is suggested that three-dimensional soil arching, i.e., soil arching effects in both the transverse and longitudinal directions of the tested pipe, should be considered in calculating the earth pressures at the pipe top. The pipe-soil separation is substantiated by the observation that earth pressure measured at the bottom of the pipe is zero. Finally, empirical equations are proposed to correlate the volume of pipe displacement profile with the volume of settlement trough at the backfill surface to facilitate evaluation of the performance of the pipes subjected to the localized land subsidence. Abstract:The serviceability loss of High Density PolyEthylene (HDPE) double-wall corrugated 32 pipes caused by localized ground subsidence has been reported all over the world. Theory of beams 33 on Winkler elastic foundation is commonly used to analyze structural responses of buried pipes 34 subjected to ground subsidence. However, the theory of beams on Winkler elastic foundation 35 assumes that the displacement of buried pipes exactly matches the soil settlement trough (i.e., the 36 displacement of pipe is equal to the soil settlement underneath the pipe). This assumption is not able 37 to present the pipe behavior and load distribution around the pipe when pipe-soil separation occurs a...

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“…General technical progress and civilization development have caused the requirements for technical systems to increase [11][12][13][14][15][16]. The construction of gas pipelines and the associated facilities is associated with deep interference in the environment and creates many threats for it.…”

Section: Introductionmentioning

confidence: 99%

Approaches for Safety Analysis of Gas-Pipeline Functionality in Terms of Failure Occurrence: A Case Study

et al. 2018

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Abstract:The development of appropriate assessment methods of gas-pipeline functionality contributes to the reduction of failure consequences and helps engineers to make the right decisions as to the optimal solution choice for technical facilities, as well as provides procedures to protect their users and the surrounding environment. This paper presents methods for the assessment of gas network operation. Pipe failure data were collected from a gas distribution network. A statistical analysis of the failure of gas networks was made. An attempt was made to isolate seasonal and accidental fluctuations in the tested failure stream. The Poisson distribution was proposed as a model of failure distribution of gas networks. The conducted analysis allowed us to propose the forecasting method of acceptable failure consequences using the homogeneous Markov chain. The obtained results are valuable for supporting the management of urban gas networks, mainly in terms of the strategic modernization plans and the rehabilitation techniques.

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Numerical simulation of strength failure of buried polyethylene pipe under foundation settlement

Cited by 57 publications

References 8 publications

Analysis of the gas network failure and failure prediction using the Monte Carlo simulation method

Analysis of the gas network failure and failure prediction using the Monte Carlo simulation method

Laboratory evaluation of buried high-density polyethylene pipes subjected to localized ground subsidence

Approaches for Safety Analysis of Gas-Pipeline Functionality in Terms of Failure Occurrence: A Case Study

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