JP3115488U - Automatic simple dynamic cone penetration tester - Google Patents

Abstract

[PROBLEMS] To ensure the accuracy of free fall height, to prevent human error such as miscounting, mistakes, avoiding dangers such as pinching fingers between hammer and knocking head, and to recover arm fatigue A simple automatic dynamic cone testing machine that can save a lot of work by saving labor and automation.
A simple dynamic cone testing machine determined by the Geotechnical Society of Japan is installed by attaching the following five parts. The mounting part is composed of 1 control / display part, 2 driving part, 3 working part, 4a and 4b measuring part, 5a and 5b supporting part, and 6 data output terminal part.
[Selection] Figure 1

Description

  The present invention relates to a simple dynamic cone penetration tester provided with a power unit and automated.

  Conventionally, the purpose of the simple dynamic cone penetration test established by the Geotechnical Society is to “freely drop a hammer with a mass of 5 kg from a height of 50 cm and determine the penetration resistance of the soil”. In order to make it fall freely from a height of 50 cm, it is done by human power. This dynamic penetration test has the merit that if it is a fist-sized gravel, it can be crushed by a hammer drop impact and tested deeper, but has the disadvantage that the number of drops increases. There are such disadvantages, two to three people are required to perform the test, and the free fall height of 50 cm cannot be ensured accurately due to fatigue of the arms to raise and lower the hammer, miscounting the number of penetrations, Artificial errors such as mistakes in recording and transcription, the occurrence of a personal accident that causes the fingers to be pinched between the hammer and the knocking head because the rod is supported by the hand, and considerable breaks are required to recover the fatigue of the arm It is. There was nothing that could ensure automation, accuracy, prevention of human error, avoidance of danger, labor saving, and personnel reduction by using power as in the present invention.

Conventionally, two to three people are required to perform this dynamic penetration test, and the free fall height of 50 cm cannot be accurately secured due to fatigue of the arm for moving the hammer up and down. It takes a lot of rest time to recover from fatigue due to human error such as when doing or transcribed or mistakenly recorded. there were.
Accordingly, the present invention seeks to solve these drawbacks by providing a power device to automate the vertical movement of the hammer.

  The present invention is an automatic simple dynamic cone penetration tester that uses power. The simple dynamic cone penetration tester defined by the Geotechnical Society has one control / display part, two drive parts, three working parts, 4a and 4b measurement parts. By mounting the 5a and 5b support parts and 6 data output terminal parts, the free fall height of 50cm is ensured accurately, and the number of intrusions is wrong, and human error such as mistakes in recording and transcription is prevented. Since the rod is supported by the hand, avoiding personal accidents and dangers such as pinching fingers between the hammer and the knocking head, saving labor for considerable rest time to recover fatigue, and testing alone The problem is solved by reducing the number of personnel because it can be implemented.

  This invention is an automatic simple dynamic cone penetration tester that uses power, and uses power by attaching five parts to the simple dynamic cone penetration tester specified by the Geotechnical Society, which is conducted manually by the ground during the ground survey. Thus, automation, accuracy, prevention of human error, avoidance of danger, labor saving, and reduction of personnel can be secured. Therefore, (1) the accuracy of the free fall height seen in the past, (2) miscounting of the number of intrusions, mistakes in writing when recording or transferring, and (3) supporting the rod by hand. Therefore, accidents such as pinching fingers between the hammer and the knocking head, (4) the need for considerable break time to recover the fatigue of the arm, (5) two to three personnel can be eliminated Excellent in terms. It is also excellent in appearance.

Best mode for carrying out the invention

  Use a power to move the hammer up and down to ensure a free fall height of 50 cm, accurately measure the number of intrusions, prevent personal injury, and improve efficiency by eliminating breaks for workers and working alone. Will be able to.

  A simple dynamic cone penetration tester is automated by using electricity as power, the hammer is moved up and down accurately by power, and the cone penetrates into the ground when it falls 50 cm to the knocking head, and the scale carved into the rod The depth of penetration can be measured with a wire, and the number of hammer drops can be measured at a measurement site, so that the ground can be easily investigated.

  An embodiment of the invention will be described with reference to the drawings. The simple dynamic cone testing machine consisting of a hammer, guide rod, knocking head, rod and cone is in accordance with the regulations stipulated by the Geotechnical Society. In FIG. 1, the following six parts are mounted on a simple dynamic cone testing machine defined by the Geotechnical Society. The mounting part is composed of 1 control / display part, 2 driving part, 3 working part, 4a and 4b measuring part, 5a and 5b supporting part, and 6 data output terminal part. The control / display part 1 is composed of controls, controls, switches, and displays for controlling the power, and transmits the controlled power to the drive unit and at the same time displays / records the measured result. The driving part 2 is a part that allows the hammer to be lifted accurately by 50 cm by using the power output from the control part to ensure that the hammer is allowed to fall freely, and at the same time it can be operated repeatedly. The operation part 3 is a part where a hammer having a mass of 5 kg moves up and down between 50 cm in height. The measurement parts 4a and 4b are parts for measuring the number of hammer hits and measuring the penetration depth and transmitting them to the display unit. The support portions 5a and 5b vertically support the rod and guide rod supported by the hand, and the length of the foot can be adjusted so as to support the drive portion and the measurement portion. The data output terminal part 6 stores the obtained data and outputs it. This includes a form in which one or more of the five parts are mounted on a simple dynamic cone testing machine defined by the Geotechnical Society.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Control / display part 2 Drive part 3 Operation part 4a Measurement part-Strike count 4b Measurement part-Penetration depth 5a Support part 5b Foot length regulator 6 Data output terminal part 7 Power source 8 Cable

Claims (1)

An automatic simple dynamic penetration tester characterized by being automated by installing a power unit in a simple dynamic cone penetration tester that is conducted manually.

Images