Various submittals are required during the construction process to monitor the project progress, problems encountered and to document the work carried out. These include the following: pre-construction survey reports, documented as-built conditions, construction logs, materials installed, extent and causes of delays, locations of affected areas, and unusual problems or conditions encountered.

Pipe bursting represents an effective method for trenchless replacement of existing pipes. The research results discussed have supplemented the experience gained by contractors, manufacturers and public works engineers and have resulted in:

• a greatly improved understanding of the level of vibration and ground movement associated with pipe replacement operations and how these diminish with distance from the burst location
• greater confidence in the …

This clause includes requirements to rehabilitate existing sanitary sewers by the pipe bursting method. This method involves splitting the existing pipe and immediately installes a new polyethylene pipe reconnecting existing sewer house connections, television inspection of the polyethylene pipe and complete installation in accordance with the Contract documents.

1. The Contractor shall be certified by the particular Pipe Bursting System Manufacturer that such firm is licensed installer of their system.
2. Polyethylene pipe jointing shall be performed by personnel trained in the use of thermal buttfusion equipment and recommended methods for new pipe connections. Personnel directly involved with installing the new pipe shall receive training in the proper methods for handling and installing the polyethylene pipe. …

Submit the following Contractor's Drawings:

1. Shop drawings, catalog data, and manufacturer's technical data showing complete information on material composition, physical properties, and dimensions of new pipe and fittings. Include manufacturer's recommendation for handling, storage, and repair of pipe and fittings damaged.
2. Method of construction and restoration of existing sewer service connections. This shallinclude:
1. Detail drawings and written description …

The methods approved for rehabilitation of existing sanitary sewers by pipe bursting and installation of new polyethylene pipe are xxx, or prior approved equal.

Tests for compliance with this specification shall be made as specified herein and in accordance with the applicable ASTM Specification. A certificate with this specification shall be furnished, upon request, by the manufacturer for all material furnished under this specification. Polyethylene plastic pipe and fittings may be rejected if they fail to meet any requirements of this specification.

All sewer service connections shall be identified, located and excavated prior to the pipe insertion to expedite reconnection. Upon commencement, pipe insertion shall be continuous and without interruption from one manhole to another, except as approved by the engineer and/or his representative. Upon completion of insertion of the new pipe, the Contractor shall expedite the reconnection of services so as to minimize any inconvenience to the customers.

Sewer service connections shall be connected to the new pipe by mechanical methods or electrofusion methods. Once the saddle is secured in place, a hole shall be drilled full inside diameter of saddle outlet in pipe liner.

1. Mechanical saddles shall be made of polyethylene pipe compound that meets the requirements of ASTM D1248, Class C, have stainless steel straps and fasteners, neoprene gasket and backup plate. Mechanical saddles shall be Strap-On-…

1. By-Pass Pumping: The Contractor, when and where required, shall provide diversion for the pipe bursting/replacement process. The pumps and by-pass lines shall be of adequate capacity and size to handle all flows. All costs for by-pass pumping, required during installation of the pipe shall be subsidiary to the pipe reconstruction item.
2. The Contractor shall be responsible for continuity of sanitary sewer service to each facility connected to the section …

Television inspection of pipelines shall be performed by experienced personnel trained in locating breaks, obstacles and service connections by closed circuit color television.

Television inspection shall include the following:

1. Video tapes (post) to be submitted to the city before final invoice.
2. Video tapes to remain property of the city; Contractor to retain second copy for his use.
3. All flows tributary to reach of sewer being inspected are to be completely …

Insertion or launching pits shall only be allowed at locations of existing or proposed manholes, unless otherwise approved by Engineer, to minimize impact on existing trees.

Equipment used to perform the work shall be located away from buildings so as to lessen the noise impact. Provide silencers or other devices to reduce machine noise as required to meet requirements.

The Contractor shall install all pulleys, rollers, bumpers, alignment control devices and other equipment required to protect existing manholes, and to protect the pipe from damage during installation. Lubrication may be used as recommended by the manufacturer. Under no circumstances will the pipe be stressed beyond its yield stress.

The annular space shall be sealed at the manhole. Sealing shall be made with material approved by the Engineer and/or his representative and shall extend a minimum of eight (8) inches into the manhole wall in such a manner as to form smooth, uniform, watertight joint.

1. After the existing sewer is completely replaced, internal inspection with television camera and video tape shall be carried out as required. The finished tape shall be continuous over the entire length of the sewer between two manholes and be free from visual defects.
2. Defects which may affect the integrity or strength of the pipe in the opinion of the Engineer shall be repaired or the pipe replaced at the Contractor's expense.

The polyethylene pipe shall be assembled and joined at the site using the thermal butt-fusion method to provide a leak proof joint. Threaded or solvent-cement joints and connections are not permitted.

All equipment and procedures used shall be used in strict compliance with the manufacturer's recommendations. Fusing shall be accomplished by personnel certified as fusion technicians by a manufacturer of polyethylene pipe and/or fusing equipment.