Page 1 Page 2 Page 3 Page 4 Page 5 Page 6 Page 7 Page 8 Page 9 Page 10 Page 11 Page 12 Page 13 Page 14 Page 15 Page 16 Page 17 Page 18 Page 19 Page 20 Page 21 Page 22 Page 23 Page 243 An introduction to pipe jacking and microtunnelling Contents 2a) Table comparing the environmental aspects and carbon savings of open trench and pipe jacked sewer construction at two typical sewer diameters 4 8 1 THE PIPE JACKING TECHNIQUE 2 APPLICATIONS AND BENEFITS 3a) Diagram showing typical ground information required for design and costing 3b) Table of parameters to be considered in relation to each soil type 3c) Table illustrating ground treatment and face support methods for varying ground conditions 10 3 SITE INVESTIGATION AND INFORMATION REQUIRED ON SOIL CONDITIONS 4a) Table: Design of working shafts in dry ground 4b) Table: Design of working shafts in wet ground 4c) Table of indicative jacking lengths achievable between shafts for mechanised drives 4d) Guidelines for curved drives 4e) Table illustrating pipe jacking excavation methods for dry and wet ground 13 4 DESIGN AND CONSTRUCTION METHODS 20 22 5 PIPE JACKING PIPES 6 JACKING LENGTHS, LOADS AND TOLERANCES An overview of pipejacking and microtunnelling and its benefits Different pipe materials and secondary linings and their uses