Plans and Specifications
The contract documents typically include the contract agreement, general conditions, special conditions, project plans, specifications, geotechnical report,
and CCTV records. The plans and specifications for pipe bursting projects should have all the required information for typical open cut water or wastewater
pipeline projects plus the information listed in this section. The drawings should provide information about the existing site conditions and the required
construction work. Description of site constraints (i.e., work hours, noise, etc.) and the procedures to review the CCTV data should be listed in the
notes section in the drawings. The plans may also include information to show erosion and sediment control requirements, flow bypassing plans, and
service connection and reinstatement details. Generally the plans should include:
- Limits of work; horizontal and vertical control references.
- Topography and survey points of existing structures.
- Boundaries, easements, and rights-of-way.
- Existing utilities, sizes, locations, and pipe materials.
- The verification requirements for existing utilities.
- Plan and profile of the design alignment.
- Existing point repairs, encasement, sleeves, etc.
- Construction easement and the allowable work areas around the insertion and pulling pits.
- Details for lateral connections and connections to the rest of the network.
- Restoration plans.
- Traffic control plans.
- Existing flow measurements for bypass pumping (Najafi 2007).
The technical specifications supplement the drawings in communicating the project requirements. The technical specifications should include:
- Minimum contractor qualifications.
- Permit matrix and responsibilities.
- Safety requirements with focus on confined space entry, flow bypass, and shoring.
- Scheduling requirements and construction sequence.
- Pipe and manhole materials
- Standards and tolerances for materials, wall thickness and class, testing and certification requirements.
- Construction installation instructions for pipe joining and handling.
- Fittings, appurtenances, and connection-adaptors.
- Acceptable material performance criteria and tests.
- Construction considerations
- Flow bypassing, downtime limits, and service reinstatement requirements.
- Spill and emergency response plans.
- Traffic control requirements.
- Erosion and sediment control requirements.
- Existing conditions documentation (e.g., photographs, videos, interviews).
- Protection plan for existing structure and utility (ground movement monitoring).
- Accuracy requirements of the installed pipe.
- Daily construction monitoring reports.
- Field testing and follow-up requirements for pipe joining, pipe leakage, disinfection, backfill, etc.
- Site restoration and spoil material disposal requirements (Najafi, 2007).