Lezkairu Utilities Tunnel

Chasco, Francisco de Asís Ramírez; Seco, A.; Cobo, Eduardo Prieto

doi:10.1061/(asce)sc.1943-5576.0000071

Cited by 10 publications

(4 citation statements)

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“…The process of MUT construction using this method includes (1) surveying; (2) demolition of urban furniture; (3) excavation of the surface for diverting the current utilities; (4) diversion of the old utilities that already exist in the location; (5) trench excavation; (6) assembly of the trench shoring system; (7) preparation of the bed for placing the precast concrete sections; (8) delivery of the precast concrete sections to the construction site; (9) attaching the sections to the crane and lifting them; (10) placement of the sections; (11) sealing the joint between sections; (12) installation of the required supports (e.g., trays and hangers) for the utility systems; (13) installation of the utilities; ( 14) displacement of the trench shoring system; (15) backfilling; (16) installation of the MUT's own networks (e.g., security cameras, fire detectors, etc. ); and (17) pavement restoration.…”

Section: Candc Simulation Modelmentioning

confidence: 99%

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Stochastic Simulation of Construction Methods for Multi-purpose Utility Tunnels

Jorjam,

Mawlana,

Hammad

2023

Infrastructures

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The traditional method of installing underground utilities (e.g., water, sewer, gas pipes, electrical cables) by burying them under roads has been used for decades. However, the repeated excavations related to this method cause problems, such as traffic congestion and business disruption, which can significantly increase financial and social costs. Multi-purpose Utility Tunnels (MUTs) are a good alternative for buried utilities. Although the initial cost of MUTs is higher than that of the traditional method, social cost savings make them more feasible, especially in dense urban areas. Different factors, such as the specifications of utilities, the location of the MUTs, and the construction method, should be investigated to determine if MUTs can be an economical and practical alternative. The construction method is one of the most important factors to assess to have a successful MUT project and reduce its impact on the surrounding area. Simulation can be used to investigate the different construction methods of MUTs. In this paper, two Stochastic Discrete Event Simulation models depicting two MUT construction methods (i.e., microtunneling and cut-and-cover) are developed to analyze the duration and cost of the MUT projects. Also, 4D simulation models of these methods are developed for constructability assessment of these projects.

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Section: Candc Simulation Modelmentioning

confidence: 99%

“…MUT construction methods can be classified into two main groups: cut-and-cover (C&C) methods [14,15] and trenchless methods [16]. Despite the high initial cost of the trenchless methods, avoiding the excavation of roads and low social costs make these methods more appealing.…”

Section: Introductionmentioning

confidence: 99%

Stochastic Simulation of Construction Methods for Multi-purpose Utility Tunnels

Jorjam,

Mawlana,

Hammad

2023

Infrastructures

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“…The construction of utility tunnels has undergone development for over 100 years, leading to the emergence of two main construction methods: cast-in-place (CIP) concrete and prefabricated concrete [6][7][8]. While CIP utility tunnels offer high flexibility in execution, their application often necessitates extensive formwork, resulting in time-consuming processes due to concrete hardening.…”

Section: Introductionmentioning

confidence: 99%

Pseudo-Static Tests on Top Joints of Hybrid Precast Utility Tunnel

Xue,

Chen,

Bai

2023

Buildings

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This paper introduces a new type of hybrid precast MUT, consisting of precast composite top slab and double-skin sidewalls with reserved rebar. The seismic behavior of the top joints was examined through pseudo-static tests. Four full-scale specimens, including both exterior and interior precast joints, in addition to two corresponding cast-in-place (CIP) joints, were fabricated and subjected to reversed cyclic loading. The results showed that both the precast and CIP joints exhibited flexure failure, characterized by the formation of a plastic hinge at the end of the sidewall. The hysteresis curves of both precast and CIP joints exhibited comparable shapes and quantities of hysteresis loops. The load-carrying capacities for exterior precast joints and corresponding CIP joints were 141.25 kN and 143.5 kN, exhibiting a difference of less than 1.6%. The load-carrying capacities for interior precast and corresponding CIP joints were 60.5 kN and 62.75 kN, displaying a variance of less than 3.6%. The precast specimens demonstrated comparable levels of ductility, energy dissipation, and structural integrity as the CIP specimens. These findings provide validation for designing and analyzing the hybrid precast utility tunnel using identical principles and models as applied CIP structures.

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“…Currently, researchers have analyzed the planning and design [12,13], construction [14][15][16], or O&M stage [17] of UUT projects. Several studies have attempted to solve certain challenges in construction and O&M. To ensure safety and sustainability in the O&M stage, scholars have proposed to avoid the risks in later operations by incorporating considerations at the UUT design stage [18]. Yet, these studies neglected the whole life cycle factors affecting UUT sustainability.…”

Section: Introductionmentioning

confidence: 99%

How to Guarantee the Sustainable Operation and Maintenance of Urban Utility Tunnels? From the Perspective of Stakeholder and the Whole Life Cycle

Cao

Gong

et al. 2023

Buildings

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Urban utility tunnels (UUTs) have become an important infrastructure for sustainable urban development. However, numerous uncertainties brought by the complex stakeholder groups seriously hinder sustainable operation and maintenance (O&M) of UUT projects, which make it necessary to plan the development of UUT projects in advance. Previous studies mostly identified and analyzed the influencing factors from the partial life cycle perspective and neglected the limitations of exploring the complex whole life cycle factors from one single perspective. This paper comprehensively considered the perspectives of stakeholder roles and the whole UUT project life cycle and proposed a factor identification and analysis framework. In the factor identification section: (a) literature surveys were conducted to identify all influencing factors of stakeholders at each stage; and (b) 21 types of factors were identified through semi-structured interviews. In the factor analysis section: (a) the hierarchical structure of the factors was analyzed by introducing the Decision-Making Trial and Evaluation Laboratory (DEMATEL) approach and Interpretative Structural Model (ISM); (b) the various factors were divided into linkage, dependent, autonomous, and driving factors to clarify their influence degrees; and (c) the core influencing factor was determined based on the above analysis results and the two perspectives. The results indicated that (1) the pricing and charging mechanism is the decisive factor affecting the sustainable O&M of UUTs, the government should focus on establishing a standardized and transparent pricing and charging mechanism; (2) policy support to encourage social capital and user participation should be actively explored; and (3) UUT development must rely on the strong promotion of the government, and the needs of all stakeholders throughout the life cycle should be paid attention to. This study can provide useful insights for guaranteeing the sustainable O&M of UUTs in China and similar regions.

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Lezkairu Utilities Tunnel

Cited by 10 publications

References 0 publications

Stochastic Simulation of Construction Methods for Multi-purpose Utility Tunnels

Stochastic Simulation of Construction Methods for Multi-purpose Utility Tunnels

Pseudo-Static Tests on Top Joints of Hybrid Precast Utility Tunnel

How to Guarantee the Sustainable Operation and Maintenance of Urban Utility Tunnels? From the Perspective of Stakeholder and the Whole Life Cycle

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