Trench Repair and Utility Cut
ility Cut Patching (UCP) is a major cause of pavement deterioration in city streets. The streets of the city of Riyadh are no exception. A study was undertaken to investigate factors related to UCP and possibly contributing to pavement deterioration. Existing pavement conditions, materials properties of patch and pavement, and geometry of trench were among the factors investigated. Pavement deterioration was evaluated by deflection measurements at various points on the patch and existing pavement using a falling weight deflectometer. Analysis of the results indicated that deflection at the center of the patch is the most critical one. Furthermore, deflection readings at various points on the patch indicated the dependency of patch deflection on trench geometry and existing pavement structural conditions. Investigation of patching effects on pavement roughness suggested an increase in roughness of pavement due to UCP.
The impact of discontinuities resulting from vertical cuts in existing pavements is widely recognized as one of the main causes of deterioration. The pavement deterioration resulting from UCP results in a noticeable nuisance to road users due to pavement roughness and due to traffic flow interruptions caused by closing the road for the repair of pavement failures.
Installing, replacing, or repairing underground utilities is one of the most common reasons for patching in pavements, especially in urban areas. Depending on how well agencies manage to coordinate with each other, a perfectly good pavement may need to get torn up on account of utility work. Then when the work is done and the pavement is patched up again, often the patch doesn’t perform as well as the rest of the pavement.
Open cut trench excavation is the traditional and most popular method for sewer lateral sewer construction, repair, or replacement. Open cut trench excavation consists of excavating a trench for the manual installation of each “stick” or piece of pipe. This method is usually the least expensive method if the pipe is located under non‐pavement areas such as a front or back yard. The open-cut trench method involves excavating down to and exposing the existing pipe so that it can be repaired or replaced and then backfilled. If the open-cut trench excavation is located in a non‐pavement area the excavation can be backfilled with soil and surface vegetation restored by seed or sod. When the open-cut trench excavation is located under pavement the existing pavement must be saw cut and removed, the excavation filled with granular backfill (compacted stone or sand to prevent settlement), and the pavement must be replaced and the end of the pipe repair or replacement.
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Area We Serve
- Underkoflers Corner
- Kings Corner
- Swartz Corner