Automatic Spt Monitor
An Apparatus Is Used With An Impact Hammer Penetration Assemble Such As Standard Penetration Test (Spt) In Geotechnical Engineering. The Impact Hammer Penetration Assembly Comprises A Penetration Sample, A Series Of Rods Coupled Together And An Impact Hammer Apparatus. The Drop Of The Hammer From A Constant Height Hits The Coupled Rods And Sampler In Series And Forces The Sampler Deeper Into The Ground. The Apparatus Includes A Tip Depth Transducer And Sampler To Output A First Electrical Signal That Is A Function Of The Sampler Tip Position. A Shock Force Transducer Communicates The Axial Shock Force In The Rod To Output A Second Electrical Signal That Is A Function Of The Rod Shock Force And Hammer Blows.; A Shock Penetration Transducer Communicates The Movement Of The Coupled Rods And Sampler To Output A Third Electrical Signal That Is A Function Of The Sampler Penetration Due To The Hammer Blows. A Micro-Process Controller Monitors And Processes The First, Second And Third Signals In Real Time.
Patent Number: US7404455B2
Application Number: US2005302048A
Inventor: Yue, Zhong Qi | Lee, Chack Fan | Lee, Peter Kai Kwong | Tham, Leslie George
Priority Date: 13 Dec 2005
Priority Number: US7404455B2
Application Date: 13 Dec 2005
Publication Date: 29 Jul 2008
IPC Current: E21B004712 | E21B001900
US Class: 175027 | 173004 | 175020 | 175040 | 175044 | 175135
Assignee Applicant: The University of Hong Kong
Title: Automatic SPT monitor
Usefulness: Automatic SPT monitor
Summary: For penetration test sampler penetrated into ground or bore hole in geotechnical engineering.
Novelty: Standard penetration test apparatus for bore hole, processes primary, secondary and tertiary output signals to produce respective graph of tip position, shock force and penetration depth function
環保/綠色科技
岩土工程
香港
