JP3134021B2 - Pressurizing device for horizontal loading tester in bore - Google Patents
Pressurizing device for horizontal loading tester in boreInfo
- Publication number
- JP3134021B2 JP3134021B2 JP04306545A JP30654592A JP3134021B2 JP 3134021 B2 JP3134021 B2 JP 3134021B2 JP 04306545 A JP04306545 A JP 04306545A JP 30654592 A JP30654592 A JP 30654592A JP 3134021 B2 JP3134021 B2 JP 3134021B2
- Authority
- JP
- Japan
- Prior art keywords
- water
- pressure
- measuring
- storage tank
- water supply
- 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 - Fee Related
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Landscapes
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Description
【0001】[0001]
【産業上の利用分野】本発明は、孔内水平載荷試験機に
おいて計測用ゾンデに加圧水を供給するための装置に関
し、更に詳しく述べると、低脈動型ポンプにより貯水タ
ンクから計測用の水を計測用ゾンデに圧送し、貯水タン
ク内の水位変化から送水量を求める構造の加圧装置に関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for supplying pressurized water to a measuring sonde in a horizontal loading tester in a borehole, and more particularly to measuring water for measurement from a water storage tank by a low pulsation pump. The present invention relates to a pressurizing device having a structure for pumping water to a sonde and obtaining a water supply amount from a change in water level in a water storage tank.
【0002】[0002]
【従来の技術】構造物の基礎設計に際して、原位置にお
ける地盤の水平方向の力学的特性、地盤係数(K値)、
降伏強度、極限支持力などを知ることは極めて重要であ
る。そのための試験方法としてボーリング孔を利用した
孔内水平載荷試験がある。孔内水平載荷試験機は種々の
形式が開発されており、その代表的な例は等分布荷重方
式である。この方式では、ボーリング孔内に挿入する計
測用ゾンデのゴムチューブに水を圧入して膨張させるこ
とにより、孔壁に水平載荷力を加える。試験は、通常、
注入した水の圧力と送水量とから、孔壁に加わる荷重と
孔径変化を求めることによって行う。2. Description of the Related Art In the basic design of a structure, horizontal mechanical characteristics of the ground at an original position, ground coefficient (K value),
It is extremely important to know the yield strength and ultimate bearing capacity. As a test method therefor, there is a horizontal loading test using a borehole. Various types of horizontal loading test machines have been developed, and a typical example is an evenly distributed load type. In this method, a horizontal loading force is applied to the hole wall by injecting water into a rubber tube of a measuring sonde inserted into a borehole and expanding the rubber tube. Exams are usually
This is performed by obtaining the load applied to the hole wall and the change in the hole diameter from the pressure of the injected water and the amount of water supplied.
【0003】この試験機の圧力源としては、一般にボン
ベガスを用いている。ボンベに充填されている高圧窒素
ガスを、ニードル弁を通して地上の鋼鉄製の容量計タン
ク内に供給し、そのガス圧により前記容量計タンク内の
水を圧力調節しながら供給する方式である。この場合、
容量計タンクの液面表示部で水位を読み取ることで、送
水量を求める。[0003] A cylinder gas is generally used as a pressure source of this tester. In this method, high-pressure nitrogen gas filled in a cylinder is supplied through a needle valve into a steel volume meter tank on the ground, and the pressure in the water in the volume meter tank is adjusted by the gas pressure. in this case,
By reading the water level on the liquid level display section of the capacity meter tank, the amount of water supply is determined.
【0004】[0004]
【発明が解決しようとする課題】ボンベガスを使用する
加圧装置は、装置構成が単純で、手軽に実施できる利点
がある反面、高圧ガスを使用しているために、次に述べ
るような様々な問題があった。 鋼鉄製のタンクや窒素ガスボンベが必要となり、試験
機が重く、傾斜地や海上に運搬するのに苦労を伴う。 「高圧ガス取締法」の規制を受ける必要があり、高圧
ガス製造事業者としての届出や、年1回の耐圧試験を行
わねばならない。その上、試験機の性能とは無関係の安
全装置が必要となり、それによって試験機が更に重くな
る。 一般に高圧ガスを使用する機器は、たとえどんなに注
意深く設計・製作されていても、操作マニュアル等に従
っていない予期せざる取扱いなどによって、亀裂や破損
が生じる虞は皆無ではない。この種の試験機も例外では
なく、そのため使用する度毎に事前の充分な点検が要求
されている。しかし、この点検作業は煩瑣で時間もかか
る。A pressurizing apparatus using a cylinder gas has the advantage that the apparatus configuration is simple and can be easily implemented. On the other hand, since a high-pressure gas is used, various pressurizing apparatuses described below are used. There was a problem. Steel tanks and nitrogen gas cylinders are required, making the test machine heavy and difficult to transport on slopes and seas. It is necessary to be regulated by the "High Pressure Gas Control Law", and it is necessary to submit a notification as a high pressure gas manufacturer and conduct a pressure test once a year. In addition, a safety device is required that is independent of the performance of the test machine, which makes the test machine even heavier. In general, no matter how carefully a device using high-pressure gas is designed and manufactured, there is no danger that cracks or breakage may occur due to unexpected handling or the like not following an operation manual or the like. This type of testing machine is no exception, and requires a thorough inspection before each use. However, this inspection work is complicated and time-consuming.
【0005】またガスによる加圧方式は、ガスが圧縮性
であるため、加圧の応答性が低く、ステップ加圧の制御
は困難である。所定の試験圧力に調整するのに熟練が必
要となるからである。また歪み制御での試験には適さな
い。In the gas pressurization method, since the gas is compressible, the response of pressurization is low, and it is difficult to control step pressurization. This is because skill is required to adjust to a predetermined test pressure. Also, it is not suitable for testing with strain control.
【0006】本発明の目的は、上記のような従来技術の
問題点を解消し、高圧ガスを使用することなく水を直接
加圧供給することにより、事前の点検を簡略化できるた
め作業性に優れ、試験機の軽量化を図ることができ、コ
ンピュータ制御に適した孔内水平載荷試験機用の加圧装
置を提供することである。SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art and to simplify the prior inspection by directly supplying water under pressure without using high-pressure gas, thereby improving workability. An object of the present invention is to provide a pressurizing apparatus for a horizontal loading test machine in a hole, which is excellent, can reduce the weight of the test machine, and is suitable for computer control.
【0007】[0007]
【課題を解決するための手段】本発明は、ボーリング孔
内に挿入する計測用ゾンデのゴムチューブに水を圧入し
膨張させて孔壁に水平載荷力を加え、その送水圧力と送
水量から孔壁に加わる荷重と孔径変化を求める孔内水平
載荷試験機用の加圧装置である。上記の目的を達成する
ため本発明では、内部に計測用の水を貯蔵すると共にそ
の水位変動を測定する手段を備えた貯水タンクと、該貯
水タンクの水を計測用ゾンデのゴムチューブ内に圧送す
る加圧系配管及びその途中に位置する低脈動型ポンプ
と、前記計測用ゾンデの内圧を測定する圧力測定手段と
を具備している。According to the present invention, water is press-fitted into a rubber tube of a measuring sonde inserted into a boring hole and expanded to apply a horizontal loading force to the hole wall. This is a pressurizing device for a horizontal loading tester in a hole that determines the load applied to the wall and the change in hole diameter. In order to achieve the above object, according to the present invention, there is provided a water storage tank having means for storing water for measurement therein and measuring a fluctuation in the water level, and pumping the water in the water storage tank into a rubber tube of a measurement sound. And a pressure measuring means for measuring the internal pressure of the measuring sonde.
【0008】更に給水口及び制御弁を有する給水系配管
を設け、前記低脈動型ポンプを共用して給水口から貯水
タンクに計測用の水を給水可能とする。ここで低脈動型
ポンプとしてはギアポンプが好ましいが、その他、ベー
ンポンプやスクリューポンプなども使用可能である。ま
た貯水タンクの水位を示す水位センサ出力信号及び計測
用ゾンデの圧力を示す圧力センサ出力信号により、コン
ピュータで低脈動型ポンプの回転を制御し、予め決めら
れた加圧送水プログラムに従って載荷試験を行うように
構成することもできる。その場合、ファジー制御が好ま
しい。Furthermore the water supply piping is provided with a water supply port and the control valve, it allows water water for measuring the water tank from the water inlet share the low pulsation pump. Here, a gear pump is preferable as the low pulsation pump, but a vane pump, a screw pump, or the like can also be used. In addition, the computer controls the rotation of the low-pulsation pump based on a water level sensor output signal indicating the water level of the water storage tank and a pressure sensor output signal indicating the pressure of the measuring probe, and performs a loading test according to a predetermined pressurized water supply program. It can also be configured as follows. In that case, fuzzy control is preferred.
【0009】[0009]
【作用】貯水タンク内に貯蔵されている計測用の水は、
低脈動型ポンプによって計測用ゾンデに圧送される。計
測用ゾンデの内圧は圧力測定手段で測定でき、その時の
送水量は貯水タンクの水位変動量を求めることで算出で
きる。使用しているポンプは、脈動が少ないので圧力を
一定に保ち易く、ポンプを停止しても一定圧力を維持で
きる。また正・逆回転が可能であり、別に給水口と制御
弁を有する給水系配管を設けることで、そのポンプを利
用して貯水タンクへの給水が行える。低脈動型ポンプは
電気的に送水量制御ができるので、各部に必要なセンサ
を設けることで、容易にコンピュータ制御が可能とな
る。[Function] The measuring water stored in the water storage tank is
It is pumped to the measuring sonde by a low pulsation pump. The internal pressure of the measuring sonde can be measured by the pressure measuring means, and the amount of water supply at that time can be calculated by obtaining the water level fluctuation amount of the water storage tank. Since the pump used has a small pulsation, it is easy to keep the pressure constant, and even if the pump is stopped, the constant pressure can be maintained. In addition, forward and reverse rotation is possible, and by providing a water supply system pipe having a water supply port and a control valve separately, water can be supplied to the water storage tank using the pump. Since the low pulsation pump can electrically control the amount of water supplied, computer control can be easily performed by providing necessary sensors in each section.
【0010】[0010]
【実施例】図1は本発明に係る加圧装置を用いた孔内水
平載荷試験機の説明図である。孔内水平載荷試験機は、
ボーリング孔10の内部に計測用ゾンデ12を挿入し、
そのゴムチューブ14内に水を圧入し膨張させて孔壁1
6に水平載荷力を加え、その送水圧力と送水量から孔壁
に加わる荷重と孔径変化を求める等分布荷重方式の1室
形式である。地上に設置する加圧装置は、計測用の水を
貯留する貯水タンク20と、ギアポンプ本体22と駆動
用モータ24からなるギアポンプ26を具備している。
貯水タンク20には、その内部に上下方向に設けたガイ
ド棒28と、そのガイド棒28に沿って上下動自在のフ
ロート30と、該フロート30の位置を検出する水位セ
ンサ32を有する。また貯水タンク20の下部とギアポ
ンプ本体22との間、及びギアポンプ本体22と計測用
ゾンデ12との間は加圧系配管34で接続する。ギアポ
ンプ本体22と計測用ゾンデ12との間には三方制御弁
36を挿入し、それに給水口38を備えた給水系配管4
0を接続する。また前記加圧系配管34の計測用ゾンデ
側に第1の圧力計42を設けると共に、計測用ゾンデ1
2から圧力ホース44を用いて地上に引出し、第2の圧
力計46を設置する。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an explanatory view of an in-hole horizontal load tester using a pressurizing device according to the present invention. The horizontal loading tester in the hole
Insert the measuring sonde 12 into the borehole 10,
Water is pressed into the rubber tube 14 to expand it, and the hole wall 1 is expanded.
6 is a one-distribution load type one-chamber system in which a horizontal loading force is applied to the chamber 6 to determine a load applied to the hole wall and a change in the hole diameter from the water supply pressure and the water supply amount. The pressurizing device installed on the ground includes a water storage tank 20 for storing water for measurement, and a gear pump 26 including a gear pump main body 22 and a driving motor 24.
The water storage tank 20 has a guide rod 28 provided in the interior thereof in a vertical direction, a float 30 movable vertically along the guide rod 28, and a water level sensor 32 for detecting the position of the float 30. A pressurizing system pipe 34 connects between the lower part of the water storage tank 20 and the gear pump main body 22 and between the gear pump main body 22 and the measurement sonde 12. A three-way control valve 36 is inserted between the gear pump main body 22 and the measuring sonde 12, and a water supply system pipe 4 having a water supply port 38 provided therein.
0 is connected. Also, a first pressure gauge 42 is provided on the measurement sound side of the pressurized system pipe 34, and the measurement sound 1
2 is pulled out to the ground using a pressure hose 44, and a second pressure gauge 46 is installed.
【0011】この加圧装置を用いて測定するには、次の
ような手順で行う。まず給水口38を適当な水源に入
れ、三方制御弁36を操作して給水系配管40からギア
ポンプ本体22の方向への流路を形成する。そしてギア
ポンプ26を逆回転させることにより、水源の水を給水
口38から給水系配管40を通して汲み上げ、貯水タン
ク20内に送って必要な水量を確保する。そして予め水
位センサ32で試験開始時のフロート30の位置を読み
取っておく。The measurement using this pressurizing device is performed in the following procedure. First, the water supply port 38 is put into an appropriate water source, and the three-way control valve 36 is operated to form a flow path from the water supply system pipe 40 to the gear pump main body 22. Then, by rotating the gear pump 26 in the reverse direction, the water of the water source is pumped up from the water supply port 38 through the water supply system pipe 40 and sent into the water storage tank 20 to secure a necessary amount of water. Then, the position of the float 30 at the start of the test is read by the water level sensor 32 in advance.
【0012】次に、三方制御弁36を切り換えて、給水
系配管40との連絡を遮断し、計測用ゾンデ12と連絡
するように操作する。ギアポンプ26を正回転駆動して
貯水タンク20内の水を計測用ゾンデ12のゴムチュー
ブ14内に圧送する。これによって計測用の水に加圧力
が加わり、計測用ゾンデ12のゴムチューブ14が加圧
水で膨張し、孔壁16に水平載荷力を加える。加圧力の
調整はギアポンプ26の動作を電気的に制御することで
行える。その際の計測用ゾンデ12内の圧力は第2の圧
力計46で測定することができ、送水量は貯水タンク2
0内のフロート30の位置を読み取り、試験開始時との
差から算出できる。それ故、この送水圧力と送水量から
孔壁に加わる荷重と孔径変化が求まる。なお、第1の圧
力計42は、ギアポンプ26の吐出圧力のモニターに使
用している。Next, the three-way control valve 36 is switched to operate so as to cut off communication with the water supply system pipe 40 and communicate with the measuring sonde 12. The gear pump 26 is driven to rotate forward to pump the water in the water storage tank 20 into the rubber tube 14 of the measuring sound 12. As a result, pressure is applied to the measurement water, and the rubber tube 14 of the measurement sonde 12 expands with the pressurized water to apply a horizontal loading force to the hole wall 16. The adjustment of the pressing force can be performed by electrically controlling the operation of the gear pump 26. At this time, the pressure in the measuring sonde 12 can be measured by the second pressure gauge 46, and
The position of the float 30 within 0 is read and can be calculated from the difference from the start of the test. Therefore, the load applied to the hole wall and the change in the hole diameter are obtained from the water supply pressure and the water supply amount. The first pressure gauge 42 is used to monitor the discharge pressure of the gear pump 26.
【0013】ここで計測用ゾンデへの送水量を流量計を
使用して計測することも考えられるが、その方式では微
少流量を計測する場合に、精度が低く、装置も複雑化す
るため、好ましくない。それに対して本発明のように貯
水タンク20の水位変化から送水量を求める構成は、装
置が簡略化され、且つ精度も高くなり好ましい。Here, it is conceivable to measure the amount of water supplied to the measuring sonde using a flow meter. However, in this method, when measuring a very small flow rate, the accuracy is low and the apparatus becomes complicated. Absent. On the other hand, the configuration for obtaining the water supply amount from the change in the water level of the water storage tank 20 as in the present invention is preferable because the device is simplified and the accuracy is increased.
【0014】本発明の他の実施例を図2に示す。これは
全載荷試験プロセスをコンピュータ制御で自動的に行え
るように構成したものである。加圧装置は、計測用の水
を貯留する貯水タンク50と、ギアポンプ本体52と駆
動用モータ54からなるギアポンプ56を具備してい
る。貯水タンク50には、その内部に上下方向に設けた
ガイド棒58と、そのガイド棒58に沿って上下動自在
のフロート60と、該フロート60の位置(即ち水位)
を検出する磁歪センサ62を有する。貯水タンク50の
下部とギアポンプ本体52との間、及びギアポンプ本体
52と計測用ゾンデとの間を配管で接続する。貯水タン
ク50とギアポンプ本体52との間に第1の三方制御弁
66を挿入し、それに給水口68とフィルタ69を備え
た配管70を接続する。また計測用ゾンデと接続する2
本の配管のうちの一方の配管74aに第1の圧力センサ
72を設けると共に、他方の配管74bに第2の圧力セ
ンサ76を設ける。配管74aとギアポンプ本体52と
の間の配管に第2の三方制御弁78を設ける。更に配管
74bと貯水タンク50との間を配管で接続し、その途
中に開閉弁79を設けると共に、その貯水タンク寄りの
位置で前記第2の三方制御弁78に配管で接続する。FIG. 2 shows another embodiment of the present invention. This is configured so that the entire loading test process can be automatically performed by computer control. The pressurizing device includes a water storage tank 50 for storing water for measurement, and a gear pump 56 including a gear pump main body 52 and a driving motor 54. In the water storage tank 50, a guide rod 58 provided in the interior thereof in a vertical direction, a float 60 movable vertically along the guide rod 58, and the position of the float 60 (ie, water level)
Is provided. The piping is connected between the lower part of the water storage tank 50 and the gear pump main body 52, and between the gear pump main body 52 and the measuring sonde. A first three-way control valve 66 is inserted between the water storage tank 50 and the gear pump main body 52, and a water supply port 68 and a pipe 70 having a filter 69 are connected thereto. Connect to the measuring sonde 2
A first pressure sensor 72 is provided on one of the pipes 74a, and a second pressure sensor 76 is provided on the other pipe 74b. A second three-way control valve 78 is provided in a pipe between the pipe 74a and the gear pump main body 52. Further, a connection is made between the pipe 74b and the water storage tank 50 by a pipe, an on-off valve 79 is provided in the middle thereof, and the pipe is connected to the second three-way control valve 78 at a position near the water storage tank by a pipe.
【0015】これらはCPU(パーソナルコンピュー
タ)80によって制御される。磁歪センサ62と第1及
び第2の圧力センサ72,76からのアナログ出力信号
は、A/D変換器82によってデジタル信号に変換さ
れ、CPU80に入力する。CPU80の出力はデジタ
ルI/O82を介して各弁66,78,79の開閉切換
えを制御すると共に、D/A変換器84でアナログ信号
に変換し、計測用ゾンデの圧力を示す第2の圧力センサ
76の出力とをコンパレータ86で比較して、その比較
結果に基づきギアポンプ56の動作を制御する。なお、
これらポンプ等の制御は一般的なデジタル制御でもよい
が、ファジーチップを組み込んでファジー制御する方が
熟練した作業員の操作に近くなり、制御はスムーズとな
る。These are controlled by a CPU (personal computer) 80. Analog output signals from the magnetostrictive sensor 62 and the first and second pressure sensors 72 and 76 are converted into digital signals by the A / D converter 82 and input to the CPU 80. The output of the CPU 80 controls the opening and closing of each of the valves 66, 78, 79 via a digital I / O 82, and is converted into an analog signal by a D / A converter 84, and the second pressure indicating the pressure of the measuring sonde. The output of the sensor 76 is compared with a comparator 86, and the operation of the gear pump 56 is controlled based on the comparison result. In addition,
The control of these pumps and the like may be general digital control, but fuzzy control incorporating a fuzzy chip is closer to the operation of a skilled worker, and control is smoother.
【0016】この装置は予めCPU80に記憶させた所
定の載荷試験プログラムにより、自動的に測定できる。
まず給水口68を適当な水源に入れ、計測用ゾンデをボ
ーリング孔内の所定の位置に設置した状態からスタート
する。CPU80により第1及び第2の三方制御弁6
6,78を制御し、開閉弁79を閉として、給水口68
から第1の三方制御弁66→ギアポンプ本体52→第2
の三方制御弁→貯水タンク50に至る配管ルートを形成
する。そしてギアポンプ56を正回転駆動することで、
水源の水を貯水タンク50に汲み上げ、必要な計測用の
水を確保する。必要水量を確保できたかどうかは、磁歪
センサ62で水位データを検出し、CPU80で判断す
る。This device can be automatically measured by a predetermined load test program stored in the CPU 80 in advance.
First, the water supply port 68 is put into an appropriate water source, and the measurement sonde is started from a state where it is installed at a predetermined position in the borehole. The first and second three-way control valves 6 are controlled by the CPU 80.
6, 78, the on-off valve 79 is closed, and the water supply port 68
To the first three-way control valve 66 → the gear pump main body 52 → the second
A piping route from the three-way control valve to the water storage tank 50 is formed. And, by driving the gear pump 56 forward,
The water of the water source is pumped into the water storage tank 50 to secure necessary measurement water. The water level data is detected by the magnetostrictive sensor 62 and the CPU 80 determines whether or not the required water amount has been secured.
【0017】次に、第1及び第2の三方制御弁66,7
8を切り換えて、貯水タンク50からギアポンプ本体5
2を通って計測用ゾンデへの配管74aに至るようにす
る。そして、予め設定した載荷試験プログラムに基づ
き、CPU80で第2の圧力センサ76の出力とを比較
しつつギアポンプ56により貯水タンク50内の水を計
測用ゾンデ内に圧送する。従って、この場合、ギアポン
プ56は一方向のみに回転するものであってよい。上記
の操作によって計測用の水に加圧力が加わり、計測用ゾ
ンデのゴムチューブが加圧水で膨張し、孔壁に水平載荷
力を加える。その際の送水量は貯水タンク50内のフロ
ート60の位置を磁歪センサ62で読み取り、開始時と
の差をCPU80で算出することで求めることができ
る。加圧力と送水量を示すデータは、時々刻々CPU8
0で記録できる。この送水圧力と送水量から孔壁に加わ
る荷重と孔径変化を求める。なお第1の圧力センサ72
は、ギアポンプ56の吐出圧力のモニターに使用してい
る。また開閉弁79は、計測用ゾンデの加圧力の調整に
も利用できるし、計測後の計測用の水の貯水タンク50
への回収にも使用できる。Next, the first and second three-way control valves 66, 7
8 from the water storage tank 50 to the gear pump main body 5.
2 to the pipe 74a to the measuring sonde. Then, based on a preset load test program, the CPU 80 compares the output of the second pressure sensor 76 with the gear pump 56 to pump the water in the water storage tank 50 into the measuring sonde. Therefore, in this case, the gear pump 56 may rotate in only one direction. The pressure is applied to the measuring water by the above operation, and the rubber tube of the measuring sonde is expanded by the pressurized water to apply a horizontal loading force to the hole wall. The amount of water supply at that time can be obtained by reading the position of the float 60 in the water storage tank 50 with the magnetostrictive sensor 62 and calculating the difference from the start time by the CPU 80. The data indicating the pressing force and the amount of water supply is stored in the CPU 8 every moment.
0 can be recorded. The load applied to the hole wall and the change in the hole diameter are determined from the water supply pressure and the water supply amount. The first pressure sensor 72
Are used to monitor the discharge pressure of the gear pump 56. The on-off valve 79 can also be used to adjust the pressure of the measuring sonde, and can be used to store the measuring water storage tank 50 after measurement.
It can also be used for recovery to
【0018】[0018]
【発明の効果】本発明は上記のように、計測用の水を直
接加圧するものであり、高圧ガスを使用しないため、
「高圧ガス取締法」の規制を受けることはなく、使用前
の点検作業も簡略化でき作業性が向上する。更に送水量
の測定に液面変動を利用しているため、微少流量でも正
確に且つ容易に測定できる。また本発明の加圧装置は従
来の計測用ゾンデをそのまま使用可能である。As described above, the present invention directly pressurizes water for measurement and does not use high-pressure gas.
It is not subject to the regulations of the High Pressure Gas Control Law, and inspection work before use can be simplified and workability is improved. Further, since the liquid level fluctuation is used for measuring the amount of water supply, accurate and easy measurement can be performed even with a small flow rate. Further, the pressurizing device of the present invention can use a conventional measuring sonde as it is.
【0019】本発明では、低脈動型のポンプを使用して
水を加圧しているため、脈動が少なく、圧力を一定に保
ちやすく、またポンプを停止しても圧力を維持でき、測
定精度が向上する。また計測用の水の汲み上げも可能と
なり、システム全体の軽量化を図ることができる。コン
ピュータ制御に適し、作業者の熟練を必要とせず、効率
よく計測が行える。In the present invention, since water is pressurized by using a low pulsation type pump, pulsation is small, the pressure is easily maintained at a constant level, and the pressure can be maintained even when the pump is stopped. improves. Also, pumping of water for measurement becomes possible, and the weight of the entire system can be reduced. Suitable for computer control, measurement can be performed efficiently without requiring the skill of an operator.
【0020】本発明では、ガスと異なり非圧縮性の水を
加圧しているため、加圧の応答が速く、そのためステッ
プ加圧の制御が容易である。また歪み制御で試験を行う
場合には、応答性が速くないと正確な試験ができない
が、その点で本発明の装置は歪み制御の試験に適したも
のとなる。In the present invention, since incompressible water is pressurized unlike gas, the response of pressurization is fast, and therefore control of step pressurization is easy. In the case of performing a test by distortion control, an accurate test cannot be performed unless the response is fast, but in that respect, the apparatus of the present invention is suitable for a test of distortion control.
【図1】本発明に係る加圧装置を用いた孔内水平載荷試
験機の説明図。FIG. 1 is an explanatory view of an in-hole horizontal load tester using a pressurizing device according to the present invention.
【図2】本発明に係る加圧装置の他の実施例を示す説明
図。FIG. 2 is an explanatory view showing another embodiment of the pressurizing device according to the present invention.
10 ボーリング孔 12 測定用ゾンデ 14 ゴムチューブ 16 孔壁 20 貯水タンク 26 ギアポンプ 30 フロート 32 水位センサ 34 加圧系配管 36 三方制御弁 38 給水口 40 給水系配管 42 第1の圧力計 46 第2の圧力計 DESCRIPTION OF SYMBOLS 10 Boring hole 12 Measurement sonde 14 Rubber tube 16 Hole wall 20 Water storage tank 26 Gear pump 30 Float 32 Water level sensor 34 Pressurized system piping 36 Three-way control valve 38 Water supply port 40 Water supply system piping 42 First pressure gauge 46 Second pressure Total
フロントページの続き (58)調査した分野(Int.Cl.7,DB名) E02D 1/00 - 1/08 E21B 49/00 - 49/10 Continuation of the front page (58) Field surveyed (Int. Cl. 7 , DB name) E02D 1/00-1/08 E21B 49/00-49/10
Claims (2)
のゴムチューブに水を圧入し膨張させて孔壁に水平載荷
力を加え、その送水圧力と送水量から孔壁に加わる荷重
と孔径変化を求める試験機において、計測用の水を貯蔵
すると共にその水位変動を測定する手段を備えた貯水タ
ンクと、該貯水タンクの水を計測用ゾンデのゴムチュー
ブ内に圧送する加圧系配管及びその途中に位置する低脈
動型ポンプと、前記計測用ゾンデの内圧を測定する圧力
測定手段とを具備し、更に給水口及び制御弁を有する給
水系配管を備え、前記低脈動型ポンプを共用して給水口
から貯水タンクに計測用の水を給水可能としたことを特
徴とする孔内水平載荷試験機用の加圧装置。1. A method for injecting water into a rubber tube of a measuring sonde to be inserted into a borehole and expanding the same so as to apply a horizontal loading force to the hole wall. In the test machine to be sought, a water storage tank equipped with a means for storing the water for measurement and measuring the fluctuation of the water level, a pressurized system pipe for pressure-feeding the water in the water storage tank into the rubber tube of the measurement sonde, and in the middle And a pressure measuring means for measuring the internal pressure of the measuring sonde , and further comprising a water supply port and a control valve.
Water supply piping, water supply port shared with the low pulsation pump
A pressurizing device for a horizontal load testing machine in a hole, characterized in that water for measurement can be supplied to a water storage tank from above .
信号及び計測用ゾンデの圧力を示す圧力センサ出力信号
により、コンピュータで低脈動型ポンプの回転を制御
し、予め決められた加圧送水プログラムに従って載荷試
験を行う請求項1記載の加圧装置。2. A computer controls the rotation of the low pulsation pump according to a water level sensor output signal indicating the water level of the water storage tank and a pressure sensor output signal indicating the pressure of the measuring probe, and according to a predetermined pressurized water supply program. The pressurizing device according to claim 1, wherein a load test is performed.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP04306545A JP3134021B2 (en) | 1992-10-20 | 1992-10-20 | Pressurizing device for horizontal loading tester in bore |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP04306545A JP3134021B2 (en) | 1992-10-20 | 1992-10-20 | Pressurizing device for horizontal loading tester in bore |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH06128930A JPH06128930A (en) | 1994-05-10 |
JP3134021B2 true JP3134021B2 (en) | 2001-02-13 |
Family
ID=17958332
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP04306545A Expired - Fee Related JP3134021B2 (en) | 1992-10-20 | 1992-10-20 | Pressurizing device for horizontal loading tester in bore |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3134021B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112609661A (en) * | 2020-11-27 | 2021-04-06 | 中建三局第一建设工程有限责任公司 | Visual underground water level monitoring and early warning threshold design method around deep foundation pit |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6218079B2 (en) * | 2014-05-20 | 2017-10-25 | 応用計測サービス株式会社 | In-hole loading test equipment |
JP6461740B2 (en) * | 2015-07-29 | 2019-01-30 | 直晃 末政 | In-hole loading test apparatus and in-hole loading test method |
JP6529405B2 (en) * | 2015-09-29 | 2019-06-12 | 基礎地盤コンサルタンツ株式会社 | Investigation method of consolidation yield stress |
-
1992
- 1992-10-20 JP JP04306545A patent/JP3134021B2/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112609661A (en) * | 2020-11-27 | 2021-04-06 | 中建三局第一建设工程有限责任公司 | Visual underground water level monitoring and early warning threshold design method around deep foundation pit |
CN112609661B (en) * | 2020-11-27 | 2022-05-10 | 中建三局第一建设工程有限责任公司 | Visual underground water level monitoring and early warning threshold design method around deep foundation pit |
Also Published As
Publication number | Publication date |
---|---|
JPH06128930A (en) | 1994-05-10 |
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