Checklists for excavation, trenching, pipes before application, pipe installation, gravel envelope, manholes, outlets, jacket crossing, and backfilling are all required at various stages of urban stormwater system development. An inspection checklist for the urban storm water construction process is presented in this article. The following are some of the necessary checks that must be performed during excavation: The excavation’s alignment and grade must be constantly maintained. It should be ensured that the excavated material is deposited at least 1 metre away from the excavation’s edge. In terms of dust abatement, it should be guaranteed that the criteria of applicable codes or specifications are followed. In areas with unstable sub-grade, over excavate and stabilise should be alerted and documented in the daily project report.
When a classified excavation occurs, a contractor representative should be notified, and the amount of excavated rock should be recorded. The term “classified excavation” refers to the fact that prices for ordinary excavation and rock excavation are different. It should be reviewed to see if the contractor’s classified excavation plan has been filed and accepted by the contracting officer. Checklist for Trenching Underground utilities that are not depicted on the design or indicated by the utility company on the field should be avoided by the engineer. If workers are forced to step into a least 1.5m trench, safety precautions must be used unless the earth is sufficiently stable. This is necessary to avoid unfavourable outcomes owing to trench wall failure. Examples of measures that must be taken.
To avoid trench wall failure, incorporate the construction of a slanted trench wall or the use of shoring. Check that necessary precautions, such as fencing, are in place to prevent people and equipment from falling into the trench. Check the positioning of the escape ladder in the trench at a distance of 7.5m. If shields are necessary in the trench, they must be checked for suitable size and strength.Soil types that aren’t included in the standards must be documented. Pipes Checklist Before Application heck the pipe size to make sure you’re installing the right size. In the case of corrugated pipe, test the coating for integrity, use the right coupler, and visually inspect seam breakage.
If gasket joints are utilised, the gasket seating should be examined. Seals must be inspected if sealed pipe is being used. Perform a stretch test at least once for each shift if corrugated plastic tubing is utilised, and keep track of the test stationing and stretch %. Checklist for Pipe Installations Suresh that a surveyor’s instrument is installed whenever a pipe is installed, and that the pipe’s grade is checked on a regular basis. After the trencher has departed its location, the grade should be verified. When using a shield on an open joint pipe, look for pulled joints. The grading specifications for the gravel enclosure should be double-checked. It’s important to double-check the gravel envelope’s dimensions. The gravel packet must be sealed.
Prior to being placed into the hopper, it should be examined for contamination such as soil or organic debris. Check the gravel feed in the trenching machine hopper and the thickness of the gravel over the pipe to ensure that the required thickness is applied as specified. Envelope with Gravel Manhole Inspection Checklist Wherever manholes are installed, surveyor instruments must be installed and the grade must be monitored on a regular basis during construction. The manhole’s grade, alignment, and plumb should all be verified. Examine the size and location of the inlet holes in the pipe. Examine the filter gravel beneath the intake and exit valves. Examine the manhole-to-drainpipe connection. Check the grade, the length of the pipe into the manhole, and the length of the pipe at the first joint.
Checklist for Manholes
Check for any discontinuities in the gravel around the lower half of the manhole. It is necessary to inspect the manhole for the presence of silt. The grade of the manhole must be rechecked when backfilling is done. Manhole Inspection Checklist Checklist for Outlets No Check that the outlet pipe is coated, that it was chosen according to acceptable standards, and that it has a proper riprap for protection. The grade and placement of the output pipe end must be examined to confirm compliance with the applicable code. The backfill around the pipe must be checked for compaction. In addition, the backfill thickness must be at least 300mm thick.
Before the jacking operation begins,Contractor-installed safety fencing and signs should be double-checked. If the plan calls for a specialised pipe, the available pipe should be examined to see if it fulfils the unique pipe’s specifications. All equipment must be inspected.During the jacking process Check the safety of jacking pets and make sure there are enough spaces for labourers to flee.Examine the pipe connections. Examine the jacking equipment’s alignment and grade. Determine the pipe’s grade. Make sure any unique backfill is properly installed. The following tests should be performed when the jacking operation is completed: Check the pipe grade at both ends and make a note of it.
Checklist for Outlets
The SDSFM Program inspects dams, gives permits for dam construction, repairs, and modifications, and collaborates with dam owners and emergency management specialists to prepare and test “Emergency Action Plans” that will be used in the event of a dam failure. The Dam Safety Inspection and Compliance and Dam Safety Permits sections are in charge of dam safety. For further information, go to the Dam Safety home page. The stormwater, sediment, and erosion control programmes are managed by SDSFM’s Program Review division. Maryland’s stormwater and erosion and sediment control requirements apply to any land development that disturbs at least 5,000 square feet of land. Maryland requires that development projects use environmental site design techniques or minor rainwater collection systems.
The jacking pit’s backfilling and compaction should be examined. Verify that the ground surface has been restored to its former state.Checklist for Crossing Jackets Checklist for Backfilling It is necessary to double-check the measures used to avoid pipe movement. It should be ensured that only the relevant locations are compacted. Backfilling should be done as soon as the trenching procedure is completed. Check that compaction will not be used elsewhere other than the designated areas. Ensure that the surface restoration is completed in a timely manner. Any damage produced by the building activity should be reported, as well as the extent of the damage.
During jacking operation
The built environment consists of disturbed soils and hard surfaces such as buildings and roads, all of which have an impact on the land’s natural ability to absorb precipitation. To mitigate the negative effects of land development on the natural hydrologic cycle, the state of Maryland has implemented extensive stormwater management and erosion and sediment control programmes. Maryland’s Stormwater, Dam Safety, and Flood Management (SDSFM) Program is in charge of implementing these programmes through oversight and delegation to local governments. Program Review, Plan Review, Dam Safety Permits, Dam Safety Inspection and Compliance, and Flood Management are the five divisions of the SDSFM programme. The SDSFM Program assures that all dams in Maryland are designed, constructed, operated, and maintained safely to avoid dam collapses and the consequences.
Stormwater management means to manage surface runoff. It can be applied in rural areas.
Stormwater management plays a critical role in the maintenance of healthy streams, lakes, and aquatic life.
They work by diverting rainwater and melting snow and ice into nearby bodies of water.