The construction of subway tunnels in the coastal section is affected by special soil quality, with complex conditions unstable and vulnerability to groundwater corrosion. design difficulty greatly increased, safety performance event an earthquake reduced. To study changes shield tunnel lining structure under propose damping measures, ANSYS software used conduct numerical simulation. Firstly, s...

Basalt fiber, as a natural silicate has excellent engineering performance in high and low temperature resistance, fracture strength, toughness, shear elastic modulus nature. Shotcrete was widely used tunnel lining, slope support, coal mine roadway other projects. With the continuous development of shotcrete technology, scholars found that adding fiber to would greatly improve shotcrete. Compare...

The asymmetric temperature field is one of the main factors inducing cracking inner shaft lining during freezing-shaft sinking. evolution equation for thermophysical and mechanical properties concrete construction period basis revealing mechanism. In this study, several experiments were conducted to reveal field, thermal conductivity, specific heat capacity, compressive strength, tensile elasti...

The lining system, used in tunnel boring machines, is made of precast concrete segments. use steel fibers this kind support system can not only decrease production time and costs but also improve compressive, tensile as well flexural behaviors. A study has been carried out to examine the mechanical properties segments Tabriz metro line-2 project using three types fibers: 3D, 4D, 5D. Various exp...

The construction industry generates a considerable amount of waste. Faced with this undesirable situation, the ready-mix concrete sector, in particular, has invested energy and resources into reusing its own waste in its production process as it works towards the goal of more sustainable construction. This study examines the feasibility of incorporating two types of concrete waste, which curren...

The susceptibility of structural concrete to early-age cracking depends on material composition, methods of processing, structural boundary conditions, and a variety of environmental factors. Computational modeling offers a means for identifying primary factors and strategies for reducing cracking potential. Herein, lattice models are shown to be adept at simulating the thermal-hygral-mechanica...

This paper presents the residual mechanical properties of concrete made with crushed bricks and clay roof tile aggregates after exposure to high temperatures. One referent mixture and eight mixtures with different percentages of replacement of natural aggregate by crushed bricks and roof tiles are experimentally tested. The properties of the concrete were measured before and after exposure to 2...

A simplified analytical solution for steel plate strengthened circular tunnel concrete linings is presented, considering various interface slip modes. The full derivation the introduced in detail, from which explicit expressions stress and displacement fields throughout system are obtained. distribution of lining deformation, internal force, interaction between were investigated by tunnel-steel...