Centrifuge Modelling of Soil Load Transfer to Flexible Sewer Liners

Gumbel, John; Spasojevic, Aleksandar; Mair, RJ

doi:10.1061/40690(2003)58

Cited by 5 publications

(6 citation statements)

References 2 publications

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“…where x5gap, y5log(p crit /E9), f5log(D/t) and p crit 5Fp 0 . Equation (7) expresses log(D/t) as a bilinear function of log(p crit /E9) and gap. Thus, knowing the solutions f i (x i ,y i ), i51,4 as delineated in Fig.…”

Section: Example Applications Buckling Capacities Of Polyethylene Lin...mentioning

confidence: 99%

“…Thus, knowing the solutions f i (x i ,y i ), i51,4 as delineated in Fig. 6 yields four equations to solve for the interpolation parameters a i in equation (7). This can then yield the value of log(D/t) corresponding to any log(p crit /E9), gap within the interpolation zone 1,2,3,4.…”

Section: Example Applications Buckling Capacities Of Polyethylene Lin...mentioning

confidence: 99%

“…This can then yield the value of log(D/t) corresponding to any log(p crit /E9), gap within the interpolation zone 1,2,3,4. Alternatively, if it is required to obtain the critical pressure for a lining of given D, t, gap then put y5log(D/t), f5log(p crit /E9) in equation (7) and proceed as before.…”

Section: Example Applications Buckling Capacities Of Polyethylene Lin...mentioning

confidence: 99%

“…5 The prime function of a flexible lining is therefore to provide a waterproof membrane on the bore of the pipe, thus returning the pipe to a state of hydraulic integrity, and enabling the original soil-pipe system to maintain a state of structural stability. 7 Under the conditions described above, structural performance of the lining is dominated by its ability to sustain the external head of groundwater pressure (that must be assumed to develop once hydraulic integrity is restored) within the confines of the host pipe. The vast majority of pipes requiring renovation have a nominally circular cross-section, but subject to a relatively small ((10%) ovality.…”

Section: Introductionmentioning

confidence: 99%

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Design of cylindrical plastic pipe linings to resist buckling due to collapse pressures

Boot¹

2005

Plastics, Rubber and Composites

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Flexible (non-bonded) polymeric sewer linings are used extensively to renovate both gravity and pressure pipes. Linings for both types of pipe are subject to collapse pressures, and in the case of gravity pipes this is the dominant source of loading; the efficient design of linings to sustain collapse pressures is therefore an important problem. In this paper, the buckling of an ideal thinwalled elastic lining in a rigid cylindrical cavity is first presented as a simple closed form solution, and The effect of a representative small imperfection shown to be significant. The different types of imperfection that can be encountered in practical lined pipe systems are identified, and the situations in which each can arise are discussed. A generalised procedure for obtaining the structural imperfections in, and hence buckling capacities of, practical systems is then presented and two example applications are used to illustrate its application in specific situations.

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Section: Example Applications Buckling Capacities Of Polyethylene Lin...mentioning

confidence: 99%

Section: Example Applications Buckling Capacities Of Polyethylene Lin...mentioning

confidence: 99%

Section: Example Applications Buckling Capacities Of Polyethylene Lin...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Design of cylindrical plastic pipe linings to resist buckling due to collapse pressures

Boot¹

2005

Plastics, Rubber and Composites

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“…As a result, it was revealed that the bending moment and the deformation of the liner were restrained since the damaged host pipe partially supported the external loads. In addition, Gumbel et al [4] and Spasojevic et al [13] carried out centrifuge model tests using four hinged pieces as damaged host pipes and observed the deformation behaviors of the liners under the several conditions (the host pipe deterioration, the void in the surrounding soil, and the traffic loading surcharge). The test results showed that the deformation of the liner increases with the progress of deterioration of the host pipes.…”

Section: Introductionmentioning

confidence: 99%

Centrifuge Modeling for Mechanical Behavior of Liners in Damaged Host Pipes

Ono

Sonoda

Sawada

et al. 2015

Transp. Infrastruct. Geotech.

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In Japan, a trenchless rehabilitation method has often been used for replacing aging irrigation pipes because of the economical reason. With the method, damaged host pipes are repaired with new pipes. Namely, the rehabilitated pipeline system comprises two pipes: a damaged host pipe and a liner. The mechanical behavior of liners is influenced by host pipes. In the present study, in order to reveal the mechanical behaviors, centrifuge model tests were carried out under various conditions including the damage levels of the host pipe, the positions of surcharge load, the ring stiffness of the liner, and the stiffness of the backfill. Test results indicate that the deflection of the liner increases with the damage level of the host pipe, and the influence of the host pipe on the liner is negligible when the host pipe reaches the ultimate damaged state. In addition, the strain concentration occurs at the crown of the inner due to the contact between the edge of the damaged host pipe and the liner. The strain concentration is reduced by 20 % with the increase of the ring stiffness of the liner. It is also revealed that the strain concentration appears even if the stiffness of backfills increases.

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