The National Academies Press

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From page 7... ... 7 Introduction This chapter provides a brief overview of the different types of commonly used trenchless renewal methods. The overview of each method includes a discussion of the generally accepted applicability of the method and limiting factors. Read the entire page →
From page 8... ... 8 The Renewal of Stormwater Systems Using Trenchless Technologies between 1,000 and 2,000 ft (Osborn 2010) Read the entire page →
From page 9... ... Trenchless Renewal Methods 9 Construction The construction was scheduled for December, a relatively dry month in Wisconsin, to mitigate the potential need to bypass flows. The CIPP liner was installed using the inversion method and air (Figure 1) Read the entire page →
From page 10... ... 10 The Renewal of Stormwater Systems Using Trenchless Technologies Access to both ends of the pipe is needed to facilitate installation and grouting of the annular space. Joining shorter sections of pipe together during insertion can reduce the amount of required space. Read the entire page →
From page 11... ... Trenchless Renewal Methods 11 The annular space between the new liner and existing pipe is typically grouted. The grout is required for a structural renewal. Read the entire page →
From page 12... ... 12 The Renewal of Stormwater Systems Using Trenchless Technologies removal, the existing pipe is removed by (1) reaming or crushing the pipe into small pieces that are removed by circulating drilling mud or slurry or (2) Read the entire page →
From page 13... ... Trenchless Renewal Methods 13 The following case study is for an ILR project completed in Ohio in June and July 2014 using pipe bursting (Adamtey 2016) Read the entire page →
From page 14... ... 14 The Renewal of Stormwater Systems Using Trenchless Technologies the inside of the existing pipe must be clean to promote proper adhesion of the coating, flow through the existing pipe must be bypassed, and infiltration must be sealed. The following case study is for an SIPP project completed in Indiana in September 2015 using a fiber-reinforced geopolymer resin (Keaffaber 2016) Read the entire page →
From page 15... ... Trenchless Renewal Methods 15 Summary The small size of the equipment limited the disturbance to traffic and a single product was used for both the spot repair and the new liner. While most of the leaks were mitigated, additional rehabilitation will be required to complete the mitigation. Read the entire page →
From page 16... ... 16 The Renewal of Stormwater Systems Using Trenchless Technologies The following case study is for a CFP project completed in Colorado in fall 2012 by swagelining a 27-in. steel-finished water main (Matthews and Randall 2014) Read the entire page →
From page 17... ... Trenchless Renewal Methods 17 Summary The successful renewal of the water transmission main using swagelining required deliberate preparation including bypassing the existing flow, CCTV to verify there were no obstructions and that the pipe was clean, and construction of reinforced concrete anchor block. Summary of Advantages and Challenges The following summary of the advantages and challenges (Tables 1 and 2) Read the entire page →
From page 18... ... 18 The Renewal of Stormwater Systems Using Trenchless Technologies high strength, steel wires embedded in a spin-cast or spray-applied cementitious or polymeric matrix and sandwiched between two epoxy-impregnated, fiber-reinforced polymer sheets. The process as described in the literature requires personnel entry and starts with applying the fiberreinforced polymer sheets to the inside of the existing pipe, installing the steel wire, applying the cementitious or polymeric matrix, and applying a second set of fiber-reinforced polymer sheets to covert the matrix. Read the entire page →
From page 19... ... Trenchless Renewal Methods 19 PVC backing that is mechanically fastened in strips to the inside of the existing pipe. A sealant is used along the seams of the overlapped strips to help prevent infiltration. Read the entire page →
From page 20... ... 20 The Renewal of Stormwater Systems Using Trenchless Technologies Additional Information No discernable change in the GCCM was observed during a 9-month, post-construction review of the installation. Tacoma Water continues to perform regular inspections of the culvert and is hopeful that they will achieve an additional 15 to 20 years of life from the renewed culvert. Read the entire page →
From page 21... ... Trenchless Renewal Methods 21 Chapter Summary This chapter provides a brief overview of CIPP, SL, MSL, ILR, SIPP, and CFP trenchless renewal methods. The generally accepted applicability of the methods and limiting factors are included in the overview. Read the entire page →

From page 7...

... 7 Introduction This chapter provides a brief overview of the different types of commonly used trenchless renewal methods. The overview of each method includes a discussion of the generally accepted applicability of the method and limiting factors.