Structural performance of sliplined watermain

Zhao, Jingmei; Daigle, L

doi:10.1139/l01-068

Cited by 19 publications

(5 citation statements)

References 3 publications

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“…Additionally, based on the trend of load changes after cracking, the bearing capacity of the pipe sections with a pinned interface no longer increased during the continued loading process due to serious interfacial peeling and remained at a certain level, while the bearing capacity of the pinned and naturally bonded interfacial pipe sections underwent a certain increase after the pipe sections cracked. This illustrates that as the interfacial bonding increased, the longer the pipe in the laminated structure, the more effectively the liner layer functions, resulting in an increased bearing capacity of the after the repair was carried out [23,24].…”

Section: Comparison Of the Ultimate Load And Load Capacity Improvementmentioning

confidence: 99%

Experimental Study on the Bearing Capacity of Reinforced Concrete Pipes with Corrosion-Thinning Defects Repaired by UHP-ECC Mortar Spraying

Zhang

Gong

et al. 2023

Applied Sciences

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The in situ spraying method is widely used because of its advantages as a trenchless pipeline repair technology, including a fast construction speed and close bonding between the repair lining layer and the reinforced concrete pipe. However, current research on high-performance spray repair materials, the bearing capacity of pipelines before and after repair, and the failure modes between the two interfaces after repair is insufficient. Through laboratory tests designed with multiple sets of control tests, this paper outlines the bearing capacity of reinforced concrete pipelines with corrosion thinning defects repaired with ultra-high-performance concrete. The variation law of the residual bearing capacity of reinforced concrete pipes and the influence of different corrosion degrees, repair thicknesses, and interface forms on the bearing capacity of reinforced concrete pipes were studied following UHP-ECC for pipe repair. The results showed that the bearing capacity of the structure decreased with an increase in the corrosion thickness of the pipeline. After repair with ultra-high-performance concrete, the bearing capacity of corroded pipelines greatly improved. When the corrosion and repair thicknesses were the same, the bearing capacity of the repaired pipeline with different interface forms was very different. After the interface was implanted with nails, spray repair was carried out and the bearing capacity of the pipeline improved the most, followed by the naturally bonded interface. When plastic film was pasted on the repair interface, the bearing capacity of the pipeline improved the least.

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Section: Comparison Of the Ultimate Load And Load Capacity Improvementmentioning

confidence: 99%

Experimental Study on the Bearing Capacity of Reinforced Concrete Pipes with Corrosion-Thinning Defects Repaired by UHP-ECC Mortar Spraying

Zhang

Gong

et al. 2023

Applied Sciences

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“…In 2013 investigation of the status of the channel was organized and a restoration plan was subsequently devised. A section of 875 meters was identified in need of immediate rehabilitation [13]. The damage included corrosion, leaks and infiltration, which was facilitated by the proximity of the River Main.…”

Section: Case Study: Relining Project In Würzburg Germanymentioning

confidence: 99%

“…A total of 401 non-circular profiles in lengths of 1 to 2.35 m and with a wall thickness of 25 mm were used in the rehabilitation of the old sewer [13].…”

Section: Case Study: Relining Project In Würzburg Germanymentioning

confidence: 99%

Relining of pipe systems: conditions, benefits and application through case-study

Vladimirov

Simoner

Bîcă

2017

Ovidius University Annals of Constanta - Series Civil Engineering

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-Relining is one of the best alternatives available today for pipe system rehabilitation. This trenchless solution is particularly interesting for urban agglomerations, as a smaller diameter pipe is pushed or pulled through the old pipeline. Relining creates a leak-tight "pipe within a pipe" system, which is as good as new in both structural and hydraulic terms. Relining can be performed with both circular and special, non-circular (NC) profiles. The latter is especially advantageous for the rehabilitation of old sewers, many of which were constructed in a variety of ovoid-like shapes. This paper presents the typical steps that are performed for pipeline rehabilitation with non-circular profiles, as well as an applied case study (a project implemented in the city of Würzburg in Germany).

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“…McAlpine believes that the mortar lining forms a composite structure with the original pipeline and it was found that the lining was mainly tensile and the bending stiffness of the pipeline increased after repair [ 16 ]. Zhao and Daigle think that the lining layer and the original pipe form a composite structure and that the interface is completely smooth [ 17 ]. The lining thickness also has a great influence on the pipeline performance.…”

Section: Introductionmentioning

confidence: 99%

Study of the Structural Mechanical Properties of Drainage Canals Rehabilitated by Spraying Method

et al. 2022

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A large number of drainage pipes and canals in China have been in disrepair for a long time and there have been problems such as leakage and corrosion. In response to these problems, this paper studies a non-excavation technology for repairing the arched canal structure—the in-situ spraying method. To study the influence of the original canal structure on the mechanical characteristics of the lining structure by in-situ spraying and the restraint effect on the lining structure, a field model test with a similar ratio of 1:2 was conducted in the field test pit. By conducting four stages of three-point concentrated load loading tests, the mechanical characteristics of the lining structure were investigated to reveal the influence of the canal structure on the force of the lining structure. The test results show that: the maximum crack width of the newly added lining structure is 0.27 mm and the normal service ultimate bearing capacity of the arched structure repaired by H-70 reaches 150 kN; comparing the loading test and the numerical simulation results, the difference between the two vault displacement results is 4.65% and the results are relatively consistent. The displacement of the bottom of the lining structure is small and the participation of the bottom plate is small, while the displacement of the upper arch structure of the lining is significantly larger than the lateral displacement, indicating that the canal structure can effectively limit the lateral displacement of the newly added lining and that the canal structure is greatly reduced. The bending moment of the lining structure is improved and the restraint effect on the arch foot is more obvious. This paper proposes the use of H-70 to repair arched canal structures by the in-situ spraying method and seeks to prove the feasibility of this method and fill the gap of research in this area. This paper provides the structural design basis and experimental knowledge for the construction of the repair method, which has important practical significance for the pipeline repair project in the future.

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Structural performance of sliplined watermain

Cited by 19 publications

References 3 publications

Experimental Study on the Bearing Capacity of Reinforced Concrete Pipes with Corrosion-Thinning Defects Repaired by UHP-ECC Mortar Spraying

Experimental Study on the Bearing Capacity of Reinforced Concrete Pipes with Corrosion-Thinning Defects Repaired by UHP-ECC Mortar Spraying

Relining of pipe systems: conditions, benefits and application through case-study

Study of the Structural Mechanical Properties of Drainage Canals Rehabilitated by Spraying Method

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