Geotechnical Geotechnical Assessment
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1 Site Investigation Site Investigation Pile Probing Pile Probing Geotechnical Logging Geotechnical and Sampling Logging and Sampling Streetworks and Utilities Streetworks Avoidance and Utilities Avoidance Piling Risk Assessment Piling Risk Assessment Geotechnical Geotechnical Assessment Assessment Contamination Ground Gas and Water Ground Monitoring Gas and Drilling Drilling Abstraction
2 COMACCHIO 300 The Comacchio 300 is a compact multi-purpose hydraulic rig, capable of drilling using rotary augers (solid or hollow stem), rotary drilling through rock (open hole or coring), dynamic sampling and SPT/U sampling. This rig has been fitted with a NG500 mud pump, making mobilisation and setup for water flush easier and quicker. 300mm clamps allow for a wider variety of drill string to be used where required. There is a mist pump fitted with wash down facilities attached, allowing cleaning of both drill string and site surface. Comes with concrete coring attachment. Comacchio 300 hydraulic rig specifications: Rotary speed rpm Tracking speed 1 km/hr Clamp range mm Open Hole** 80m Dynamic Sampling 10m bgl Dimensions Minimum Height (ideal height is 5200mm, however at min height drilling is slower) Length 4500 Width 3000 Feed stroke 2400mm Feed/retract force 5000 dan Rotary torque danm Hollow/Solid Stem Auger 30m bgl Coring** 80m bgl Minimum width 1500 (reduced to 1100mm for access) Height 2400 Length 4800 COMACCHIO 205 The Comacchio 205 is a compact multi-purpose hydraulic rig, capable of drilling using rotary augers (solid or hollow stem), rotary drilling through rock (open hole or coring), dynamic sampling and carrying out SPT/U samples. Comacchio 205 hydraulic rig specifications: Rotary speed rpm Tracking speed 1.5 km/hr Clamp range mm Open Hole** 40m bgl Dynamic Sampling 10m bgl Dimensions Minimum Height (ideal height is 5100mm, however at min height drilling is slower) Length 3400 Width 1500 Feed stroke 2430mm Feed/retract force 2500 dan Rotary torque danm Hollow/Solid Stem Auger 20m bgl Coring** 40m bgl Width 1500 (reduced to 1100 for access) Height 1900 Length 4700 Symmetrix: Casing - OD (194mm) ID (175mm) Casing ring bit - OD (194mm), ID (154mm) Rod - 89mm Terranox 6 DTH Hammer Shock Absorber 6 in-hole 3 ½ API reg Drive head thread 2 3/8 API reg *Maximum depth is subject to ground conditions **Casing used where required (to max depth 40m) Additional drill string can be purchased on request to achieve specifications required for a site *Maximum depth is subject to ground conditions **Casing used where required (to max depth 40m) Additional drill string can be purchased on request to achieve specifications required for a site
3 PREMIER 110 The Premier 110 is a self-contained percussive probing/sampling rig mounted on a remote controlled rubber tracked undercarriage, specifically designed for dynamic probing (DPSH), standard penetration testing (SPT) and dynamic sampling for geotechnical and environmental applications. Comes with concrete coring attachment. Dynamic probing rig specifications: Dimensions PREMIER 110 PETROL Hammer kg x 760mm fall x 35 blows/min Carriage stroke mm Push - 300kg Pullback kg Max gradient - 30 Speed 3km/h Sampling depth - 15m DPT 15m+ bgl* *Maximum depth is subject to ground conditions Height 2200* Width 860 (no side basket - 750) Length 2100 Height 1350* Width 860 (no side basket - 750) Length 2200* *No upper rod guide PREMIER 110 DIESEL Hammer kg x 760mm fall x 35 blows/min Carriage stroke mm Push - 300kg Pullback kg kg Max gradient - 30 Speed 3km/h Sampling depth - 15m DPT 15m+ bgl* *Maximum depth is subject to ground conditions Height 2200* Width 1000 (no side basket - 850) Length 2200 Height 1500* Width 1000 (no side basket - 850) Length 2300* *No upper rod guide DRILLING SPECIFICATIONS Casing / Coring Tube O.D. Tube I.D Core Liner HW Casing 4.5 (114.3) 4 (101.6) N/A PW Casing (139.7) (127.0) N/A SW Casing (168.3) (150.8) N/A PWF Core Barrel (92.1) 92.3 T6H Core Barrel* * Shell OD: 99.2 mm (convert inches) Drilling Type Open Hole Drilling Drill Rod (98.8) (79)w ¾ (146) Drag O.D. Drag I.D. NWY (66.7) (54.0) Auger Auger O.D Auger I.D Cutter Head O.D 5¾ (146) Core Liner Hollow Stem Auger 7 5 /8 (194) 4 ¼ (108) (229) 87.0 Solid Stem Auger 6 (152) N/A 6 (152) N/A Barrel O.D. Dynamic Sampling (Casing 115mm) Liner Size
4 DELTA DRILLING SERVICES Air Flush During rotary drilling air is used to flush disturbed material to the surface, this process is much faster and simpler than water flushing. BRE365 We are able to test the ground for soakage potential over a three-day period without leaving any open excavations, removing the need for permanent safety barriers and security. We carry out many of these and they have proved an efficient way to recover information on ground properties. Coring rock Core drilling is carried out using a triple-tube core barrel. Delta- Simons can core up to 80m, subject to ground conditions. Dynamic sampling Dynamic sampling (or windowless sampling) is carried out by either track-mounted percussive samplers or hand-held equipment. Samples are retrieved and then logging by a suitably qualified geotechnical engineer. Dynamic sampling is suited to restricted access sites, limited depth contamination investigations, and projects where disturbance must be kept to a minimum. This method can quickly cover a site and is very cost-effective. Foundation pits Delta-Simons has experience in digging foundation pits in order to identify existing foundations, where we will log the findings and provide supporting photos. Groundwater Abstraction Boreholes The Delta-Simons drilling team can install boreholes for domestic and non-domestic properties for the extraction of up to 20m 3 of water per day. Hollow Stem Auger (HSA) Hollow stem auger drilling techniques allow soil sampling with the capacity to case the borehole as sampling proceeds. Monitoring or remedial wells can then be installed through the centre of the hollow stem augers before removing them. Pile probing Encountering obstructions during piling works and clearing these obstructions can cause significant cost implications to the construction programme. By carrying out a pile probing exercise, Delta-Simons Drilling can identify obstructions in advance of the piling works, avoiding costly delays. Rotary open hole Rotary drilling is used to form a deep observation borehole or for obtaining representative samples of rock which could not be recovered using traditional cable percussion or dynamic sampling methods. Open hole boring is suitable for rapid drilling at a greater depth, to look for coal measures/ voids and for the installation of monitoring wells. Delta-Simons can drill up to 60m, subject to ground conditions. Service avoidance When an excavation is required, service plan assessment, cable avoidance tools and onsite observation are used to identify existing services ensuring that all investigation works can be planned and undertaken safely and efficiently. Once an area is cleared it can be dug up to 1.2m before any drill string is put into the ground. Solid Stem Auger (SSA) Solid stem drilling is a fast and effective way of drilling a borehole in soft soil conditions, and is used for pile probing and setting monitoring wells. SPTs (calibrated) The standard penetration test (SPT) is a continuous soil testing procedure to test relative density and shear strength of the strata. SPT results are obtained at regular intervals throughout various drilling methods. U70/U100T The U sample is used for obtaining undisturbed samples in clay and other cohesive soils, giving a nominal 70mm/100mm diameter sample. Water flush During rotary drilling water is used as a lubricant to flush disturbed material to the surface water, which is then recirculated through filtered tanks. Delta-Simons has experience in drilling through coal, where water flushing is required in order to reduce the risk of displacement of hazardous gases and to prevent sparks. Water Flush Rotary methods with SPTs Comacchio coring rock
5 Contact information: T: +44 (0) E: Follow us on social media Head office: 3 Henley Office Park Doddington Road Lincoln I LN6 3QR
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