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The construction of masonry paving involves using materials such as bricks, stones, and concrete masonry units. These materials are chosen for their shape, color, strength, and resistance to abrasion and weathering. Masonry units can be installed dry on a thin layer of sand and a gravel base, or they can be embedded in mortar or asphalt on a concrete slab. For areas subjected to heavy vehicular loads, a rigid base layer of reinforced or unreinforced concrete is recommended. In contrast,...
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Concrete pavement joints are essential for maintaining the structural integrity and longevity of pavement by controlling where and how the pavement cracks. These joints can be categorized based on their functions, such as contraction or control joints, construction joints, isolation joints, and expansion joints.
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Simulation of surface runoff control effect by permeable pavement.

Wang Chen1, Mulian Zheng1, Qian Gao2

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Summary
This summary is machine-generated.

Permeable pavement (PP) effectively reduces urban runoff. Fully permeable designs eliminate runoff, while surface drainage types significantly decrease runoff depth and delay its onset.

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Area of Science:

  • Environmental Engineering
  • Urban Hydrology
  • Sustainable Infrastructure

Background:

  • Urbanization increases surface runoff, leading to waterlogging.
  • Permeable pavement (PP) is a key strategy for urban runoff mitigation.
  • Limited research exists on the performance of different PP structures in roadways.

Purpose of the Study:

  • To investigate the runoff reduction effects of various permeable pavement structures in Chinese sponge city carriageways.
  • To compare the performance of surface drainage, base course storage and drainage, and fully permeable PP types.
  • To identify key factors influencing PP's runoff reduction capabilities.

Main Methods:

  • Development of runoff models using the Storm Water Management Model (SWMM).
  • Simulation of three distinct PP structures under various rainfall recurrence periods.
  • Analysis of influential factors including rainfall, structure type, and permeable layer thickness.

Main Results:

  • Rainfall recurrence period, PP structure, and permeable layer thickness are critical factors for runoff reduction.
  • Surface drainage PP reduced runoff depth and coefficient by over 14% and delayed runoff by >40 minutes.
  • Base course storage and drainage PP generated runoff only at a 50-year recurrence period; fully permeable PP produced no runoff under tested conditions.

Conclusions:

  • Fully permeable pavement offers the highest runoff reduction, eliminating it entirely.
  • The selection of PP structure and permeable layer thickness is crucial for effective urban waterlogging mitigation.
  • Recommended runoff coefficient values are provided to guide the design and implementation of PP systems.