JPS552179A - Sand column compacting state recorder - Google Patents

Sand column compacting state recorder

Info

Publication number
JPS552179A
JPS552179A JP4955479A JP4955479A JPS552179A JP S552179 A JPS552179 A JP S552179A JP 4955479 A JP4955479 A JP 4955479A JP 4955479 A JP4955479 A JP 4955479A JP S552179 A JPS552179 A JP S552179A
Authority
JP
Japan
Prior art keywords
acceleration
recorded
compacting machine
sand
vibration
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.)
Granted
Application number
JP4955479A
Other languages
Japanese (ja)
Other versions
JPS5531250B2 (en
Inventor
Hiroshi Wada
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 JP4955479A priority Critical patent/JPS552179A/en
Publication of JPS552179A publication Critical patent/JPS552179A/en
Publication of JPS5531250B2 publication Critical patent/JPS5531250B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)

Abstract

PURPOSE: To provide the subject recorder wherein the vibration of a compacting machine is detected and recorded in acceleration thereby to obtain only energy consumed by the compaction of sand, and further the value obtained is converted into N value, thereby making it possible to obtain accurately the compacting state of sand column.
CONSTITUTION: The vibration of a vibrator 3 of a compacting machine 1 is detected as a variation of voltage by a vibration acceleration detector 7, and recorded in a recorder 9. The vibromotive force of the vibrator 3 is represented by the product of the weight of the compacting machine 1 and the vibration acceleration thereof. Here, the compacting machine 1 is blindly hit in the air and the acceleration α1 upon this occasion is recorded. Then, the compacting machine 1 is penetrated through the gound, and the acceleration α2 upon this occasion is recorded. Thereafter, sand is supplied, while being weighed, into the steel pipe 5 of the compacting machine 1 to effect the compaction, and the acceleration a3 upon this occasion is recorded. It is possible to obtain energy consumed for the compaction of sand from the difference between the above described accelerations (α2-α3).
COPYRIGHT: (C)1980,JPO&Japio
JP4955479A 1979-04-21 1979-04-21 Sand column compacting state recorder Granted JPS552179A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4955479A JPS552179A (en) 1979-04-21 1979-04-21 Sand column compacting state recorder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4955479A JPS552179A (en) 1979-04-21 1979-04-21 Sand column compacting state recorder

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP13911173A Division JPS5090105A (en) 1973-12-12 1973-12-12

Publications (2)

Publication Number Publication Date
JPS552179A true JPS552179A (en) 1980-01-09
JPS5531250B2 JPS5531250B2 (en) 1980-08-16

Family

ID=12834409

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4955479A Granted JPS552179A (en) 1979-04-21 1979-04-21 Sand column compacting state recorder

Country Status (1)

Country Link
JP (1) JPS552179A (en)

Also Published As

Publication number Publication date
JPS5531250B2 (en) 1980-08-16

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