JPH0729476Y2 - Soil backfill hardness tester - Google Patents
Soil backfill hardness testerInfo
- Publication number
- JPH0729476Y2 JPH0729476Y2 JP1986050240U JP5024086U JPH0729476Y2 JP H0729476 Y2 JPH0729476 Y2 JP H0729476Y2 JP 1986050240 U JP1986050240 U JP 1986050240U JP 5024086 U JP5024086 U JP 5024086U JP H0729476 Y2 JPH0729476 Y2 JP H0729476Y2
- Authority
- JP
- Japan
- Prior art keywords
- hammer
- ground
- impact sensor
- rod
- hardness tester
- 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 - Lifetime
Links
Landscapes
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Description
【考案の詳細な説明】 〈産業上の利用分野〉 本考案は、電話、ガス、水道等の設置或は補修等の際に
発掘した土の埋め戻し硬さ試験機に関する。DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a backfill hardness tester for soil excavated when installing or repairing a telephone, gas, water, etc.
〈従来技術〉 通常、上述のように道路などにおいて、電話、ガス、水
道等の工事の際に発掘した土を埋め戻した時、その埋め
戻した土が一定基準の硬さに復元されることが義務付け
られている。<Prior Art> Normally, when the soil excavated at the time of construction of telephone, gas, water, etc. is backfilled on the road as described above, the backfilled soil is restored to a certain standard hardness. Is obligatory.
そこで、これまで埋め戻した土の硬さを測定する手段と
しては簡易式のものや、現場で採集したデータを、デー
タ処理室で別個に解析したりするなど多くの手段が採用
されている。Therefore, as the means for measuring the hardness of the soil that has been backfilled so far, there are adopted many means such as a simple type and a method of separately analyzing the data collected at the site in a data processing room.
例えば、文献「掘削発生土の再利用」昭和59年12月5日
付山海堂発行第66頁乃至第74頁に記載があるように、コ
ーン貫入試験や土研式貫入試験、球体落下試験その他が
ある。For example, as described in the document “Reuse of excavated soil” on December 5, 1984, published by Sankaido, pages 66 to 74, cone penetration test, earthwork type penetration test, ball drop test, etc. is there.
即ち、上記コーン貫入試験は先端に30°の開き角度を持
ったコーンを有する貫入ロッドをプルービングリングを
介して手押しにより地中に貫入するようにし、その時の
貫入抵抗により生じる前記プルービングリングの変形歪
みの大きさをダイヤルゲージによって読み取りデータ処
理をすることにより地盤の埋め戻し硬さを求めるように
している。That is, in the cone penetration test, a penetration rod having a cone having an opening angle of 30 ° is made to penetrate into the ground by pushing through a proving ring by hand, and the deformation strain of the proving ring caused by the penetration resistance at that time. The backfill hardness of the ground is determined by reading the size of the data with a dial gauge and processing the data.
又、土研式貫入試験では、60°の開き角度を持ったコー
ンを有する貫入ロッドを埋め戻し地盤に起立保持し、該
貫入ロッド上に嵌入した重錘を該貫入ロッド上の一定高
さの位置から反復落下し、該コーンが土中の一定深さに
貫入するに至るまでの繰り返し落下回数を記録すること
により地盤の硬さを測定しようとするものである。Further, in the earth-penetration type penetration test, a penetration rod having a cone having an opening angle of 60 ° is erected and retained on the backfill ground, and a weight fitted on the penetration rod has a constant height on the penetration rod. The hardness of the ground is to be measured by recording the number of repeated drops from the position where the cone repeatedly falls until the cone penetrates into a certain depth in the soil.
更に、球体落下試験では、一定高さの重錘を定められた
高さから自然落下させ、該球体が地面に接してその衝撃
によって生じた陥没孔の大きさからその地盤の硬さとな
るデータを得るようにしたものである。Furthermore, in the sphere drop test, a weight with a certain height is naturally dropped from a specified height, and the hardness of the ground is calculated from the size of the depression hole caused by the impact of the sphere coming into contact with the ground. It's something I got to get.
その他にも上記手段により更に複雑でしかも装置化した
大型の機器を用いてデータを採集する手段がある。(前
記文献参照) 〈考案が解決しようとする問題点〉 しかし、上記前三者は何れも手軽で現場設置も容易であ
ると共に持ち運びや、操作等何れも簡単である反面、取
り扱い方によって著しく誤差を生じたり、又、装置化し
た大型のものは設置場所の制限を受けたり、設置のため
の調整その他で汎用性に乏しい欠点があった。In addition, there is a means for collecting data using a large-scale device which is more complicated and deviceized by the above means. (Refer to the above-mentioned document) <Problems to be solved by the device> However, while the above three formers are both easy and easy to install in the field and easy to carry, operate, etc. In addition, there is a drawback in that the large-sized device is limited in installation place, is not versatile in adjustment for installation, and the like.
そこで、本考案においては、上記従来の試験装置より更
に手軽で、しかも準備や測定操作が容易であると共に、
高精度のデータを迅速に得ることのできる装置を提供す
ることを目的とするものである。Therefore, in the present invention, it is more convenient than the above-mentioned conventional testing device, and the preparation and measurement operation are easy, and
It is an object of the present invention to provide an apparatus capable of quickly obtaining highly accurate data.
〈問題点を解決する為の手段〉 直立保持できる円筒状のハンマーガイドと、該ハンマー
ガイド内にあって自然落下でき内部にインパクトセンサ
ーを収納したハンマーと、該ハンマー内のインパクトセ
ンサーに接続された検出演算装置とからなる。<Means for solving the problem> A cylindrical hammer guide that can be held upright, a hammer that can fall naturally in the hammer guide and that has an impact sensor housed inside, and a hammer sensor that is connected to the impact sensor in the hammer And a detection arithmetic unit.
〈作用〉 ハンマーガイドを測定しようとする埋め戻し地盤上に直
立保持し、該ハンマーガイド内にあるハンマーを一定の
高さまで引き上げて、該ハンマーを自然落下させる。そ
して、ハンマーが地面に接した時の衝撃力の大小をイン
パクトセンサーによって電気的に検出し、そのデータを
検出演算装置によって直ちに解析し、その地点における
硬さを判定し、表示するものである。<Operation> The hammer guide is held upright on the backfilled ground to be measured, the hammer in the hammer guide is pulled up to a certain height, and the hammer is naturally dropped. Then, the magnitude of the impact force when the hammer comes into contact with the ground is electrically detected by the impact sensor, the data is immediately analyzed by the detection calculation device, and the hardness at that point is determined and displayed.
〈実施例〉 以下、本考案について図面に示す実施例により詳細に説
明すると、一定の高さを有する中空のハンマーガイド1
の下端外周に鍔状の着床板3を熔接或はその他螺子など
によって定着して、該ハンマーガイド1を埋め戻した地
盤上で垂直に自立できるようにし、該ハンマーガイド1
内にには、該ハンマーガイド1の上端より適当な長さ突
出する中空の杆体6の下端にハンマー支持体5を定着
し、該支持体5の下端に図面に示すように鎚打面が平坦
なハンマー2を連設すると共に該ハンマー2と前記ハン
マー支持体5との間にインパクトセンサー4(ロードセ
ルでも良い)を介在させ、更に杆体6の上端に把手9を
直交連設して、該ハンマー2を引き上げ可能ならしめる
と共に、前記インパクトセンサー4から杆体6、把杆9
内を経て同軸ケーブル7を引き出し、その他端に検出演
算装置11を接続してなる。<Embodiment> Hereinafter, the present invention will be described in detail with reference to an embodiment shown in the drawings. A hollow hammer guide 1 having a constant height.
A flange-shaped flooring plate 3 is fixed to the outer periphery of the lower end of the hammer by welding or other screws so that the hammer guide 1 can stand vertically on the backfilled ground.
Inside, a hammer support 5 is fixed to the lower end of a hollow rod 6 projecting an appropriate length from the upper end of the hammer guide 1, and the hammering surface is flattened at the lower end of the support 5 as shown in the drawing. A hammer 2 is provided in series, an impact sensor 4 (may be a load cell) is interposed between the hammer 2 and the hammer support 5, and a handle 9 is provided in an orthogonal connection to the upper end of the rod 6 so that 2 can be pulled up, and at the same time from the impact sensor 4 to the rod 6 and the grip rod 9.
The coaxial cable 7 is pulled out through the inside, and the detection arithmetic unit 11 is connected to the other end.
尚、図中符号8はハンマーガイド1の上端に取り付けた
口金であり、10はハンマーガイド1の略中間部に被嵌し
た搬送用のハンガーである。In the figure, reference numeral 8 is a ferrule attached to the upper end of the hammer guide 1, and 10 is a transport hanger fitted in a substantially middle portion of the hammer guide 1.
又、上記構成においてハンマー2の重量及び該ハンマー
2の地盤と接する面の広さ及び、該ハンマー2の落下行
程等は予め定められており、しかも該ハンマー2が自然
落下する際、該ハンマー2の外側とハンマーガイド1の
内壁との接触がなく、円滑に落下できるような小間隙を
形成している。Further, in the above structure, the weight of the hammer 2, the size of the surface of the hammer 2 contacting with the ground, the falling stroke of the hammer 2 and the like are predetermined, and when the hammer 2 naturally falls, the hammer 2 There is no contact between the outside and the inner wall of the hammer guide 1, and a small gap is formed so that the hammer guide 1 can fall smoothly.
本考案は上述のようになり、通路などで電話の地下埋設
工事や、水道、ガス等の設置或は補修時における発掘後
の埋め戻し地盤上に、ハンマーガイド1を着床板3によ
って自立せしめ、検出演算装置11の電源をセットしてか
らハンマー2の把手9を以って一定高さまで引き上げか
ら、該把手9の手許を釈放することで、該ハンマー2を
ガイド1内を自然落下させる。そして、該ハンマー2が
地盤に接した時の衝撃力をインパクトセンサー4で捉え
て、同軸ケーブル7を経て前記検出演算装置11に表示す
るものである。The present invention is as described above. The hammer guide 1 is self-supported by the landing plate 3 on the backfill ground after excavation for underground burial work of telephones, installation of water, gas, etc. at passages, etc. After setting the power supply of the detection arithmetic unit 11 and pulling it up to a certain height with the handle 9 of the hammer 2, the hand of the handle 9 is released, so that the hammer 2 is naturally dropped in the guide 1. Then, the impact force when the hammer 2 contacts the ground is captured by the impact sensor 4 and displayed on the detection / calculation device 11 via the coaxial cable 7.
こうしてインパクトセンサー4が受ける衝撃力は地盤の
硬さによって変化することを利用するものである。In this way, the impact force received by the impact sensor 4 is used because it changes depending on the hardness of the ground.
〈考案の効果〉 本考案は、以上のように構成されている為に測定時間が
著しく短縮(10秒程度)され多くの地点の測定が可能と
なり、硬さの平均値をより正確なものにすることができ
る。<Effect of device> Since the device of the present invention is configured as described above, the measurement time is significantly shortened (about 10 seconds), and it is possible to measure at many points, making the average hardness value more accurate. can do.
又、反力が全く必要なく構造上の安定を図ることができ
る。In addition, it is possible to achieve structural stability without requiring any reaction force.
更に、軽量且つ小型で片手で持ち運びでき作業能率を向
上できると共に操作も著しく簡単であり、多くの地点に
おけるデータを短時間で容易に採集できその場でデータ
処理することにより不足の場合には直ちに地固め作業が
再開できる。その他ハンマーガイドの下端外周に着床板
を設けている為に傾斜のない地面においては、該ハンマ
ーガイドを自立させて使用することができるので作業が
し易く、 又、小型である為埋め戻し個所の狭い場所でも実施で
き、現場の地盤を採取することなく非破壊試験である
為、測定によって路面を損傷しないなど埋め戻し管理に
適した多くの優れた効果を有する実用価値の高い考案で
ある。In addition, it is lightweight and small, can be carried with one hand, can improve work efficiency, and is extremely easy to operate, and can easily collect data at many points in a short time and process data on the spot so that if there is a shortage, it can be immediately used. The consolidation work can be resumed. In addition, since the flooring plate is provided on the outer periphery of the lower end of the hammer guide, the hammer guide can be used by standing on the ground without inclination, and it is easy to work. Since it is a non-destructive test that can be carried out even in a narrow space and does not collect the ground at the site, it is a highly practical device that has many excellent effects suitable for backfill management, such as not damaging the road surface by measurement.
添付図面は、本考案試験機の要部縦断側面図である。 1……ハンマーガイド、2……ハンマー 3……着床板、4……インパクトセンサー 6……杆体、11……検出演算装置 The attached drawing is a side view of a longitudinal section of a tester of the present invention. 1 ... Hammer guide, 2 ... Hammer, 3 ... Floor board, 4 ... Impact sensor, 6 ... Rod, 11 ... Detection / calculation device
Claims (1)
ド内に、ハンマー支持体の下端に定着した平坦な鎚打面
を有するハンマーを緩嵌挿入し、上端に把手を取着した
中空の杆体を前記ハンマー支持体の上面に定設して、該
ハンマーを所定高さまで人為的に引き上げ、或いは釈放
して自然落下するようになすと共に、該ハンマーとハン
マー支持体の空所天井面との間にインパクトセンサー又
はロードセルを介在保持し、該中空杆体内を経て前記イ
ンパクトセンサーと検出演算装置とを同軸ケーブルにて
接続してなる土の埋め戻し硬さ試験機。1. A hollow structure in which a hammer having a flat hammering surface fixed to the lower end of a hammer support is loosely inserted into a cylindrical hammer guide having a floor plate at the lower end, and a handle is attached to the upper end. The rod is fixedly installed on the upper surface of the hammer support, and the hammer is artificially pulled up to a predetermined height, or is released so as to fall naturally. An earth backfill hardness tester in which an impact sensor or a load cell is held between the two, and the impact sensor and the detection calculation device are connected via a coaxial cable through the hollow rod.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1986050240U JPH0729476Y2 (en) | 1986-04-03 | 1986-04-03 | Soil backfill hardness tester |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1986050240U JPH0729476Y2 (en) | 1986-04-03 | 1986-04-03 | Soil backfill hardness tester |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS62162652U JPS62162652U (en) | 1987-10-16 |
JPH0729476Y2 true JPH0729476Y2 (en) | 1995-07-05 |
Family
ID=30873418
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1986050240U Expired - Lifetime JPH0729476Y2 (en) | 1986-04-03 | 1986-04-03 | Soil backfill hardness tester |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0729476Y2 (en) |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS541283U (en) * | 1977-06-07 | 1979-01-06 | ||
JPS5674348U (en) * | 1979-11-12 | 1981-06-18 | ||
JPS5977336A (en) * | 1982-10-26 | 1984-05-02 | Shimadzu Corp | Device for measuring impact for high speed load tester |
-
1986
- 1986-04-03 JP JP1986050240U patent/JPH0729476Y2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPS62162652U (en) | 1987-10-16 |
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