GB1521252A - Soundness investigation - Google Patents

Soundness investigation

Info

Publication number
GB1521252A
GB1521252A GB3150074A GB3150074A GB1521252A GB 1521252 A GB1521252 A GB 1521252A GB 3150074 A GB3150074 A GB 3150074A GB 3150074 A GB3150074 A GB 3150074A GB 1521252 A GB1521252 A GB 1521252A
Authority
GB
United Kingdom
Prior art keywords
vibrator
vibration
frequency
vibration response
gauge
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3150074A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to GB3150074A priority Critical patent/GB1521252A/en
Priority to US05/596,120 priority patent/US4128011A/en
Priority to DE19752531805 priority patent/DE2531805A1/en
Publication of GB1521252A publication Critical patent/GB1521252A/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00Seismology; Seismic or acoustic prospecting or detecting
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D1/00Investigation of foundation soil in situ
    • E02D1/02Investigation of foundation soil in situ before construction work
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D33/00Testing foundations or foundation structures
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M7/00Vibration-testing of structures; Shock-testing of structures

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Structural Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Paleontology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Analytical Chemistry (AREA)
  • Soil Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Geophysics (AREA)
  • Remote Sensing (AREA)
  • Geology (AREA)
  • Acoustics & Sound (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

1521252 Investigating structures and materials R J SAVAGE 16 July 1975 [16 July 1974 28 Nov 1974 12 Dec 1974] 31500/74 51660/74 and 53803/74 Heading G1G The soundness or structural integrity of a structure is tested or monitored by transmitting vibrations through it, varying the vibration frequency, sensing the structure's vibration response at several locations of the structure, recording the vibration response frequency spectrum for each location, and either comparing the spectrum with reference data or detecting frequency shifts of the spectral peaks over a period of time. The invention is applicable to detecting fissures, aquifers or other underground anomalies e.g. below the foundations of a building or ahead of a tunnel face being driven; detecting structural changes in off-shore oil and gas platforms or in bridges, railway track, tunnel walls, or building components (beams &c); testing the strength of concrete; and to medical uses such as investigating the soundness of teeth or testing the repair of broken bones. For underground investigations a swept-frequency vibrator is coupled to the earth surface, Fig. 1 (not shown), to a vertical borehole wall, Fig. 4 (not shown), or to a tunnel face, Fig. 3A (not shown) and vibration sensors are located respectively at the earth surface, in further vertical boreholes, or in holes bored ahead of the tunnel face. Voids, &c, in the ground are detected by the resonances produced in the vibration response sensed and are localized by triangulation, using rotatable sensors. Each sensor comprises a triaxial accelerometer. Acoustic coupling of the vibrator to the ground is afforded by a saucer-shaped member held against the ground by vacuum. Fig. 5 shows a vibrator for generating shear waves in a borehole. It is anchored by a gas-filled device 26 and comprises an electrically insulated tube 20 filled with a gel in which are suspended magnetizable metallic particles 25. Application of an A.C. signal across end electrodes 23 is said to produce oscillation of the vibrator in the direction of the borehole axis. For monitoring the structural integrity of an off-shore platform at least one vibrator and several sensors are fixed above the waterline to various structural members and the vibration response is recorded digitally at intervals (of days or longer). Additionally, strain gauges are fixed to structural members below the waterline. Fig. 13 shows such a gauge, of the vibrating-wire type, in which the wire 45 is within a tube 44 fixed at least at its ends to a member. Electromagnets 46 vibrate the wire transversely in an upper harmonic mode and are used detect the vibration frequency. Alternatively a longitudinal-wave mode gauge can be used, Fig. 14 (not shown), or the gauge may comprise a water-filled tube with means for timing the two-way propagation of a shock-wave along the water column, Fig. 15 (not shown).
GB3150074A 1974-07-16 1974-07-16 Soundness investigation Expired GB1521252A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB3150074A GB1521252A (en) 1974-07-16 1974-07-16 Soundness investigation
US05/596,120 US4128011A (en) 1974-07-16 1975-07-15 Investigation of the soundness of structures
DE19752531805 DE2531805A1 (en) 1974-07-16 1975-07-16 METHOD FOR INVESTIGATING THE INTEGRITY OF A STRUCTURE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3150074A GB1521252A (en) 1974-07-16 1974-07-16 Soundness investigation

Publications (1)

Publication Number Publication Date
GB1521252A true GB1521252A (en) 1978-08-16

Family

ID=10324021

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3150074A Expired GB1521252A (en) 1974-07-16 1974-07-16 Soundness investigation

Country Status (1)

Country Link
GB (1) GB1521252A (en)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0049090A1 (en) * 1980-10-01 1982-04-07 Burks, A. Edward and Green, J. Keith Testing mechanism for floors
GB2144853A (en) * 1983-08-10 1985-03-13 Rolls Royce Component inspection by self generated transient stress wave detection
GB2146772A (en) * 1983-09-16 1985-04-24 Williamson Inc T Methods and apparatus for indicating selected physical parameters in a pipeline
GB2197473A (en) * 1986-10-31 1988-05-18 Helitune Limited Method and apparatus for vibration testing equipment
GB2236392A (en) * 1989-09-11 1991-04-03 Shell Int Research Method for improving cross-borehole seismic surveys
GB2253698A (en) * 1991-02-19 1992-09-16 Premier Brands Uk Method and apparatus for testing packages
GB2266370A (en) * 1992-04-16 1993-10-27 British Gas Plc Apparatus for use in testing the surroundings of a buried pipe
GB2366382A (en) * 2000-08-23 2002-03-06 Mecon Ltd Remote monitoring of structure condition
WO2013180592A1 (en) * 2012-06-01 2013-12-05 Siemens Aktiengesellschaft A method and system for evaluating a dam
CN105604102A (en) * 2015-12-28 2016-05-25 厦门市工程检测中心有限公司 On-site measurement method for perpendicularity of cast-in-place concrete pile body and drilling core hole
CN106959338A (en) * 2017-03-10 2017-07-18 西南交通大学 A kind of dynamic response analogue means of multi-level underground space structure and country rock
CN110965998A (en) * 2019-12-13 2020-04-07 龚大建 Detection device and detection method for shale natural frequency in shale gas well
CN113759422A (en) * 2021-09-10 2021-12-07 刘俊伟 Underground abnormal body detection method
CN114277859A (en) * 2021-12-07 2022-04-05 北京工业大学 Device and method for simulating influence of asymmetric foundation pit excavation on adjacent existing tunnel
WO2022267135A1 (en) * 2021-06-23 2022-12-29 中国地质大学(武汉) Crack deformation monitoring device for locked segment of rock slope, and arrangement method

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0049090A1 (en) * 1980-10-01 1982-04-07 Burks, A. Edward and Green, J. Keith Testing mechanism for floors
GB2144853A (en) * 1983-08-10 1985-03-13 Rolls Royce Component inspection by self generated transient stress wave detection
GB2146772A (en) * 1983-09-16 1985-04-24 Williamson Inc T Methods and apparatus for indicating selected physical parameters in a pipeline
GB2197473A (en) * 1986-10-31 1988-05-18 Helitune Limited Method and apparatus for vibration testing equipment
GB2236392A (en) * 1989-09-11 1991-04-03 Shell Int Research Method for improving cross-borehole seismic surveys
GB2253698A (en) * 1991-02-19 1992-09-16 Premier Brands Uk Method and apparatus for testing packages
GB2266370A (en) * 1992-04-16 1993-10-27 British Gas Plc Apparatus for use in testing the surroundings of a buried pipe
GB2266370B (en) * 1992-04-16 1995-07-26 British Gas Plc Apparatus for use in testing the surroundings of a buried pipe
GB2366382A (en) * 2000-08-23 2002-03-06 Mecon Ltd Remote monitoring of structure condition
WO2013180592A1 (en) * 2012-06-01 2013-12-05 Siemens Aktiengesellschaft A method and system for evaluating a dam
CN105604102A (en) * 2015-12-28 2016-05-25 厦门市工程检测中心有限公司 On-site measurement method for perpendicularity of cast-in-place concrete pile body and drilling core hole
CN106959338A (en) * 2017-03-10 2017-07-18 西南交通大学 A kind of dynamic response analogue means of multi-level underground space structure and country rock
CN110965998A (en) * 2019-12-13 2020-04-07 龚大建 Detection device and detection method for shale natural frequency in shale gas well
WO2022267135A1 (en) * 2021-06-23 2022-12-29 中国地质大学(武汉) Crack deformation monitoring device for locked segment of rock slope, and arrangement method
CN113759422A (en) * 2021-09-10 2021-12-07 刘俊伟 Underground abnormal body detection method
CN113759422B (en) * 2021-09-10 2023-11-21 刘俊伟 Underground abnormal body detection method
CN114277859A (en) * 2021-12-07 2022-04-05 北京工业大学 Device and method for simulating influence of asymmetric foundation pit excavation on adjacent existing tunnel
CN114277859B (en) * 2021-12-07 2023-09-19 北京工业大学 Device and method for simulating influence of asymmetric foundation pit excavation on adjacent existing tunnels

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee