JP2007147315A - Triaxial consolidation permeability test device and test method - Google Patents

Triaxial consolidation permeability test device and test method Download PDF

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JP2007147315A
JP2007147315A JP2005338630A JP2005338630A JP2007147315A JP 2007147315 A JP2007147315 A JP 2007147315A JP 2005338630 A JP2005338630 A JP 2005338630A JP 2005338630 A JP2005338630 A JP 2005338630A JP 2007147315 A JP2007147315 A JP 2007147315A
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water
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Akimitsu Abematsu
昭充 安部松
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Chiba Engineering Kk
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Abstract

<P>PROBLEM TO BE SOLVED: To shorten the test time of a plurality of samples in a triaxial consolidation permeability test device. <P>SOLUTION: A plurality of sample cells 15 storing the samples W1, W2, W3, etc. are arranged in a single triaxial cell 14, and the triaxial cell 14 is sealed. A pressurized water supplying means 16 supplies pressurized water into the triaxial cell 14 to pressurize the inside of a pressure chamber 25 to a predetermined pressure. In this state, water is supplied to each of the plurality of sample cells 15 through standpipes 17, and drainage from the sample cells 15 is collected in an overflow tank 18. The coefficients of permeability of the samples W1, W2, W3, etc. are determined, based on the overflow water level of the overflow tank 18 and the water level of each standpipe. Thus, the permeability test can be simultaneously applied to the plurality of samples W1, W2, W3, etc. in a triaxial stress state, and the test time can be shortened. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、実地盤に近い三軸応力状態の下で供試体である土の透水性を測定するための三軸圧密透水試験装置及び試験方法に関するものである。   The present invention relates to a triaxial consolidation permeability test apparatus and a test method for measuring the permeability of soil as a specimen under a triaxial stress state close to the actual ground.

地盤調査においては、実地盤に即して土の性状を把握することが重要である。実験室ににおいて、実地盤に近い三軸応力状態の下で供試体の透水性を測定する技術として、三軸圧密透水試験装置を用いた透水試験方法が知られている。従来の三軸圧密透水試験装置による透水試験方法について、図３を参照して説明する。   In the ground survey, it is important to understand the soil properties in line with the actual ground. As a technique for measuring the permeability of a specimen under a triaxial stress state close to the actual ground in a laboratory, a permeability test method using a triaxial consolidation permeability test apparatus is known. A water permeability test method using a conventional triaxial consolidation water permeability test apparatus will be described with reference to FIG.

図３に示すように、従来の三軸圧密透水試験装置１は、密閉された三軸セル２と、三軸セル２内に配置されて供試体３（土、改良土等）を収容する単一の供試体セル４と、三軸セル２内に加圧水を供給するための加圧給水手段５と、供試体セル４に通水するためのスタンドパイプ６（ビュレット）と、供試体セル３からの排水を受けるための越流水槽７とを備えている。   As shown in FIG. 3, a conventional triaxial consolidation permeability test apparatus 1 includes a sealed triaxial cell 2 and a single unit that is disposed in the triaxial cell 2 and accommodates a specimen 3 (soil, improved soil, etc.). From one specimen cell 4, pressurized water supply means 5 for supplying pressurized water into the triaxial cell 2, a stand pipe 6 (burette) for passing water through the specimen cell 4, and the specimen cell 3 And an overflow tank 7 for receiving the waste water.

供試体セル４は、供試体３の両端部に多孔質のペデスタル８、９介して下部キャップ１０及び上部キャップ１１を取付け、これらの側部をゴム膜１２で覆ったものである。供試体セル４の下部キャップ１０にスタンドパイプ６が接続され、上部キャップ１１には、越流水槽７が接続されている。加圧給水手段５は、加圧源及び圧力制御手段を備えており、三軸セル２内に加圧水を供給して三軸セル２内の圧力を一定に調整できるようになっている。スタンドパイプ６は、一定の断面積を有し、水位の変化に基づいて通水した水の体積を測定することができようになっている。越流水槽７は、オーバーフローによって一定の水位（越流水面）を維持することができるようになっている。   In the specimen cell 4, a lower cap 10 and an upper cap 11 are attached to both ends of the specimen 3 through porous pedestals 8 and 9, and these side portions are covered with a rubber film 12. A stand pipe 6 is connected to the lower cap 10 of the specimen cell 4, and an overflow tank 7 is connected to the upper cap 11. The pressurized water supply means 5 includes a pressure source and a pressure control means, and can supply the pressurized water into the triaxial cell 2 to adjust the pressure in the triaxial cell 2 to be constant. The stand pipe 6 has a constant cross-sectional area, and can measure the volume of water that has been passed based on a change in the water level. The overflow tank 7 can maintain a constant water level (overflow water surface) by overflow.

次に、三軸圧密透水試験装置１を用いた透水試験方法について説明する。
供試体３を収容した供試体セル４を三軸セル２内に配置し、加圧給水手段５によって加圧水を供給して三軸セル２内を一定圧力で加圧する。この状態でスタンドパイプ６から供試体セル４へ通水し、供試体３を通過した水を越流水槽７へ排水させ、オーバーフローによって越流水槽７の水位を一定に維持する。そして、一定時間に生じる越流水槽７とスタンドパイプ６との水位差ｈ０、ｈ１を測定し、その水位差の変化（ｈ０−ｈ１）に基づいて供試体３の透水係数を求める。 Next, a water permeability test method using the triaxial consolidation water permeability test apparatus 1 will be described.
A specimen cell 4 containing the specimen 3 is disposed in the triaxial cell 2, and pressurized water is supplied by the pressurized water supply means 5 to pressurize the interior of the triaxial cell 2 at a constant pressure. In this state, water is passed from the stand pipe 6 to the specimen cell 4, the water passing through the specimen 3 is drained to the overflow tank 7, and the water level of the overflow tank 7 is kept constant by overflow. And the water level difference h0, h1 of the overflow water tank 7 and standpipe 6 which arises for a fixed time is measured, and the water permeability coefficient of the specimen 3 is calculated | required based on the change (h0-h1) of the water level difference.

このようにして、実地盤に近い三軸応力状態の下で透水試験を行うことができ、実地盤に即した供試体３の性状を正確に把握することができる。このとき、三軸セル２内の加圧水の圧力によって、供試体セル４のゴム膜１２が供試体３の側面に押付けられて密着するので、供試体３の周面に沿った漏水を少なくすることができ、正確な測定を行うことができる。なお、三軸圧密透水試験に関する先行技術については、例えば特許文献１に開示されている。
特開平５−２１５７４７号公報 In this way, a water permeability test can be performed under a triaxial stress state close to the actual ground, and the properties of the specimen 3 corresponding to the actual ground can be accurately grasped. At this time, since the rubber film 12 of the specimen cell 4 is pressed against and closely contacts the side surface of the specimen 3 due to the pressure of the pressurized water in the triaxial cell 2, water leakage along the peripheral surface of the specimen 3 should be reduced. And accurate measurement can be performed. In addition, the prior art regarding a triaxial consolidation water permeability test is disclosed in Patent Document 1, for example.
JP-A-5-215747

しかしながら、上記従来の三軸圧密透水試験装置では、次のような問題がある。細粒土あるいは止水を目的とした改良土等の難透水性の供試体についての透水試験は、非常に時間がかかるため、多くの供試体について透水試験を行う必要がある場合、個々の供試体について順次、試験を行っていたのでは膨大な時間を費やすことになり、工期遅れの原因となる。そこで、複数の三軸圧密透水試験装置を用いて並列的に透水試験を行うことが考えられるが、試験設備に相当のコストがかかることになり問題がある。   However, the conventional triaxial consolidation permeability test apparatus has the following problems. Permeability tests on poorly permeable specimens such as fine-grained soil or improved soil for the purpose of stopping water are very time consuming, so if many specimens need to be tested, If the test was sequentially performed on the specimens, it would take an enormous amount of time, causing a delay in the construction period. Therefore, it is conceivable to perform a water permeability test in parallel using a plurality of triaxial consolidation water permeability test apparatuses, but there is a problem in that the test equipment is expensive.

本発明は、上記の点に鑑みてなされたものであり、三軸応力状態の下で、複数の供試体について、同時に透水試験を行うことができる低コストの三軸圧密透水試験装置及び試験方法を提供することを目的とする。   The present invention has been made in view of the above points, and a low-cost triaxial consolidation permeability test apparatus and test method capable of simultaneously performing a permeability test on a plurality of specimens under a triaxial stress state. The purpose is to provide.

上記の課題を解決するために、請求項１の発明に係る三軸圧密透水試験装置は、単一の圧力容器と、供試体を収容して前記圧力容器内に配置される複数の供試体セルと、前記圧力容器内に加圧水を供給して該圧力容器内を加圧する加圧手段と、前記複数の供試体セルにそれぞれ通水する通水手段と、該通水手段によって前記供試体セルに通水された水の流量を測定する測定手段とを備えたことを特徴とする。
請求項２の発明に係る三軸圧密透水試験装置は、上記請求項１の構成において、前記複数の供試体セルは、異なる寸法の供試体を収容することを特徴とする。
請求項３の発明に係る三軸圧密透水試験装置は、上記請求項１又は２の構成において、前記圧力容器の底部には、前記通水手段によって前記複数の供試体セルのそれぞれに通水するための複数の通水管路が設けられ、前記複数の供試体セルには、前記複数の通水管路に接続する接続部が設けられ、該接続部は、前記供試体セルの中心から偏心して配置されていることを特徴とする。
請求項４の発明に係る三軸圧密透水試験方法は、単一の圧力容器内に、供試体を収容した複数の供試体セルを配置し、前記圧力容器内に加圧水を供給して該加圧容器内を加圧し、その圧力によって三軸応力状態下にある前記複数の供試体セルにそれぞれ通水して透水試験を行うことを特徴とする。 In order to solve the above-mentioned problems, a triaxial consolidation water permeability test apparatus according to the invention of claim 1 includes a single pressure vessel and a plurality of specimen cells that are accommodated in the pressure vessel and accommodated in the pressure vessel. Pressurizing means for supplying pressurized water into the pressure vessel to pressurize the pressure vessel, water passing means for passing water through the plurality of specimen cells, and the specimen cell by the water passing means. And a measuring means for measuring the flow rate of the passed water.
A triaxial consolidation permeability test apparatus according to a second aspect of the invention is characterized in that, in the configuration of the first aspect, the plurality of specimen cells contain specimens having different dimensions.
According to a third aspect of the present invention, in the configuration of the first or second aspect, the triaxial consolidation water permeability test device allows water to pass through each of the plurality of specimen cells to the bottom of the pressure vessel by the water flow means. A plurality of water conduits are provided, and the plurality of specimen cells are provided with connecting portions connected to the plurality of water conduits, and the connecting portions are arranged eccentrically from the center of the specimen cells. It is characterized by being.
In the triaxial consolidation permeability test method according to the invention of claim 4, a plurality of specimen cells containing specimens are arranged in a single pressure vessel, and pressurized water is supplied into the pressure vessel to perform the pressurization. The inside of the container is pressurized, and a water permeability test is performed by passing water through each of the plurality of specimen cells under a triaxial stress state by the pressure.

請求項１の発明に係る三軸圧密透水試験装置によれば、単一の圧力容器内で複数の供試体セルを同時に加圧し、同時に通水することができるので、複数の供試体に対して同時に通水試験を行うことができ、試験効率を高めて工期を短縮することが可能になる。
請求項２の発明に係る三軸圧密透水試験装置によれば、異なる寸法の供試体に対して同時に通水試験を行うことができる。
請求項３の発明に係る三軸圧密透水試験装置によれば、供試体セルの接続部を偏心して配置したので、複数の供試体セルの回転位置を適宜調整することにより、これらを互いに干渉させることなく、効率よく配置することができる。
請求項４の発明に係る三軸圧密透水試験方法によれば、単一の圧力容器内で複数の供試体セルを同時に加圧し、同時に通水して、複数の供試体に対して同時に通水試験を行うことができるので、試験効率を高めて工期を短縮することが可能になる。 According to the triaxial consolidation permeability test apparatus according to the invention of claim 1, since a plurality of specimen cells can be pressurized at the same time in a single pressure vessel and water can be passed simultaneously, A water flow test can be performed at the same time, and the test efficiency can be increased and the construction period can be shortened.
According to the triaxial consolidation water permeability test device according to the invention of claim 2, it is possible to simultaneously perform a water flow test on specimens having different dimensions.
According to the triaxial consolidation permeability test apparatus according to the invention of claim 3, since the connection portions of the specimen cells are arranged eccentrically, they are made to interfere with each other by appropriately adjusting the rotational positions of the plurality of specimen cells. It can arrange efficiently.
According to the triaxial consolidation permeability test method according to the invention of claim 4, a plurality of specimen cells are pressurized simultaneously in a single pressure vessel, and water is passed simultaneously, and water is passed through the plurality of specimens simultaneously. Since the test can be performed, it is possible to increase the test efficiency and shorten the construction period.

以下、本発明の一実施形態を図面に基づいて詳細に説明する。
図１及び図２に示すように、本実施形態に係る三軸圧密透水試験装置１３は、密閉された単一の三軸セル１４（圧力容器）と、三軸セル１４内に収容される複数（図示のものでは１０個）の供試体セル１５と、三軸セル１４内に加圧水を供給するための加圧給水手段１６（加圧手段）と、各供試体セル１５にそれぞれ通水するための複数（図１には３個のみ示す）のスタンドパイプ１７（通水手段、測定手段）と、複数の供試体セル１５からの排水を受けるための越流水槽１８とを備えている。 Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
As shown in FIG.1 and FIG.2, the triaxial consolidation water permeability test apparatus 13 which concerns on this embodiment is the single triaxial cell 14 (pressure vessel) sealed, and the some accommodated in the triaxial cell 14. As shown in FIG. (10 in the figure) test specimen cells 15, pressurized water supply means 16 (pressurization means) for supplying pressurized water into the triaxial cell 14, and each specimen cell 15 for passing water A plurality of (only three are shown in FIG. 1) stand pipes 17 (water passing means and measuring means) and an overflow water tank 18 for receiving drainage from the plurality of specimen cells 15.

三軸セル１４は、透明な合成樹脂からなる円筒状の側板１９の両端部に、シール部材２０を介して下部ベース板２１（三軸セルの底部）及び上部ベース板２２が取付けられ、上部ベース板２１と下部ベース板２２とがテンションボルト２３及びナット２４によって結合されて、内部に密閉された圧力室２５が形成されている。下部ベース板２１には、供試体セル１５とスタンドパイプ１７とを接続する複数の通水管路２６及び加圧給水手段１６に接続される給水管路２７が液密的に挿通されている。また、上部ベース板２２には、越流水槽１８と複数の供試体セル１５とを接続する排水管路２８が液密的に挿通されている。   In the triaxial cell 14, a lower base plate 21 (bottom of the triaxial cell) and an upper base plate 22 are attached to both ends of a cylindrical side plate 19 made of a transparent synthetic resin via a seal member 20, and an upper base plate is attached. The plate 21 and the lower base plate 22 are joined together by a tension bolt 23 and a nut 24 to form a pressure chamber 25 sealed inside. A plurality of water conduits 26 that connect the specimen cell 15 and the stand pipe 17 and a water supply conduit 27 that is connected to the pressurized water supply means 16 are inserted into the lower base plate 21 in a liquid-tight manner. The upper base plate 22 is liquid-tightly inserted with a drain pipe 28 that connects the overflow tank 18 and the plurality of specimen cells 15.

供試体セル１５は、円柱状に成形された供試体Ｗ１、Ｗ２、Ｗ３、…のそれぞれの両端部に、多孔質のペデスタル２９、３０を介して下部キャップ３１及び上部キャップ３２を取付け、これらの側部をゴム膜３３で覆ったものであり、下部キャップ３１及び上部キャップ３２とゴム膜３３との間は、シールバンド３４によってシールされている。下部キャップ３１には、通水管路２６が接続され、上部キャップ３２には、排水管路２８が接続されており、スタンドパイプ１７の水が通水管路２６からペデスタル２９を介して供試体Ｗに通水され、ペデスタル３０を介して排水管路２８へ排水されるようになっている。供試体セル１５に接続される通水管路２６及び排水管路２８は、複数の供試体セル１５が互いに干渉することなく、また、側板１９に干渉することなく配置できるように、下部ベース板２１及び上部ベース板２２上に適当な間隔をもって配置されている。   The specimen cell 15 has a lower cap 31 and an upper cap 32 attached to each end of each of the specimens W1, W2, W3,... Formed in a cylindrical shape via porous pedestals 29, 30. The side portion is covered with a rubber film 33, and the lower cap 31, the upper cap 32, and the rubber film 33 are sealed with a seal band 34. A water conduit 26 is connected to the lower cap 31, a drain conduit 28 is connected to the upper cap 32, and the water in the stand pipe 17 is passed from the water conduit 26 to the specimen W via the pedestal 29. The water is passed and drained to the drainage pipe 28 via the pedestal 30. The water passage 26 and the drain line 28 connected to the specimen cell 15 are arranged so that the plurality of specimen cells 15 can be arranged without interfering with each other and without interfering with the side plate 19. And it is arranged on the upper base plate 22 with an appropriate interval.

加圧給水手段１６は、加圧源及び圧力制御手段を備えており、給水管路２７を通して三軸セル１４の圧力室２５に加圧水を供給して圧力室２５の圧力を一定に調整できるようになっている。スタンドパイプ１７は、一定断面積の部分を有するビュレットであり、通水管路２６を通して供試体セル２６へ通水すると共に、その水位の変化に基づいて、通水した水の体積（流量）を測定することができようになっている。越流水槽１８は、排水管路２８を通して供試体セル１５からの排水を収集し、オーバーフローによって一定の水位（越流水面）を維持することができるようになっている。   The pressurized water supply means 16 includes a pressure source and a pressure control means, so that pressurized water is supplied to the pressure chamber 25 of the triaxial cell 14 through the water supply pipe 27 so that the pressure in the pressure chamber 25 can be adjusted to be constant. It has become. The stand pipe 17 is a burette having a constant cross-sectional area, and passes water to the specimen cell 26 through the water conduit 26, and measures the volume (flow rate) of the water passed based on the change in the water level. You can do that. The overflow tank 18 collects waste water from the specimen cell 15 through the drain pipe 28 and can maintain a constant water level (overflow water surface) by overflow.

次に、三軸圧密透水試験装置１３を用いた透水試験方法について説明する。
現場から採取した土を円柱状に形成したもの、あるいは、止水等の目的に応じて土に石灰、セメント等の安定処理材を添加して円柱状に成形、固化させた改良土等の性状の異なる複数の供試体Ｗ１、Ｗ２、Ｗ３、…をそれぞれ供試体セル１５に収容する。これらの供試体Ｗ１、Ｗ２、Ｗ３、…を収容した複数の供試体セル１５を３軸セル１４内に配置し、それぞれの供試体セル１５に通水管路２６及び排水管路２８を接続し、三軸セル１４をテンションボルト２３及びナット２４によって密閉する。加圧給水手段１６によって三軸セル１４内に加圧水を供給して、圧力室２５内を所定圧力に加圧する。この状態で、複数のスタンドパイプ１７から通水管路２６を通してそれぞれの供試体セル１５に通水し、供試体Ｗ１、Ｗ２、Ｗ３を通過した水を排水管路２８を通して越流水槽１８へ排水し、越流水槽１８をオーバーフローさせて、越流水槽１８の水位（越流水位）を一定に維持する。そして、一定時間にわたって、越流水層１８とそれぞれのスタンドパイプ１７との水位差Ｈ０、Ｈ１、Ｈ２、Ｈ３、…を測定し、その水位差の変化Ｈ０−Ｈ１、Ｈ０−Ｈ２、Ｈ０−Ｈ３、…に基づいて、それぞれの供試体Ｗ１、Ｗ２、Ｗ３、…の透水係数を求める。 Next, a water permeability test method using the triaxial consolidation water permeability test apparatus 13 will be described.
Properties of soil that has been collected from the site in the form of a cylinder, or improved soil that has been molded and solidified into a cylinder by adding a stabilizing treatment material such as lime or cement to the soil according to the purpose of water stoppage, etc. A plurality of test specimens W1, W2, W3,. A plurality of specimen cells 15 containing these specimens W1, W2, W3,... Are arranged in the triaxial cell 14, and a water conduit 26 and a drain pipe 28 are connected to each specimen cell 15. The triaxial cell 14 is sealed with a tension bolt 23 and a nut 24. Pressurized water is supplied into the triaxial cell 14 by the pressurized water supply means 16 to pressurize the pressure chamber 25 to a predetermined pressure. In this state, water is passed from each of the plurality of stand pipes 17 to each specimen cell 15 through the water conduit 26, and the water that has passed through the specimens W1, W2, and W3 is drained to the overflow tank 18 through the drain pipe 28. The overflow water tank 18 is overflowed, and the water level (overflow water level) of the overflow water tank 18 is maintained constant. And the water level difference H0, H1, H2, H3,... Between the overflow water layer 18 and each standpipe 17 is measured over a certain time, and the change in the water level difference H0-H1, H0-H2, H0-H3, ..., the permeability coefficient of each specimen W1, W2, W3, ... is obtained.

このようにして、複数の供試体Ｗ１、Ｗ２、Ｗ３、…について、実地盤に近い三軸応力状態下において、同時に透水試験を行うことができ、実地盤に即した供試体Ｗ１、Ｗ２、Ｗ３、…の性状を正確かつ迅速に測定することができる。このとき、三軸セル１４内の加圧水の圧力によって、供試体セル１５のゴム膜３３が供試体Ｗ１、Ｗ２、Ｗ３、…の側面に押付けられて密着するので、供試体Ｗ１、Ｗ２、Ｗ３、…の周面に沿った漏水を少なくすることができ、正確な測定を行うことができる。本実施形態では、三軸セル１４内に１０個の供試体セル１５を配置して同時に透水試験を行うことができるので、三軸セル内に１つのみの供試体セルを配置する従来のものに比して、試験時間を１０分の１に短縮することが可能になる。また、単一の三軸セル１４内に複数の供試体セル１５を配置する構造としたことにより、従来の複数の三軸圧密透水試験装置を用いる場合に比して、大幅に設備コストを低減することができる。   In this way, a plurality of specimens W1, W2, W3,... Can be simultaneously subjected to a water permeability test under a triaxial stress state close to the actual ground, and specimens W1, W2, W3 adapted to the actual ground. ,... Can be measured accurately and quickly. At this time, since the rubber film 33 of the specimen cell 15 is pressed against the side surfaces of the specimens W1, W2, W3,... By the pressure of pressurized water in the triaxial cell 14, the specimens W1, W2, W3, Water leakage along the circumferential surface can be reduced, and accurate measurement can be performed. In the present embodiment, ten specimen cells 15 can be arranged in the triaxial cell 14 and the water permeability test can be performed at the same time. Therefore, the conventional one in which only one specimen cell is arranged in the triaxial cell. Compared to the test time, the test time can be reduced to 1/10. In addition, by adopting a structure in which a plurality of specimen cells 15 are arranged in a single triaxial cell 14, the equipment cost is greatly reduced as compared with the case where a plurality of conventional triaxial consolidation permeability test apparatuses are used. can do.

なお、上記実施形態において、重錘等を用いて三軸セル１４内の供試体セル１５に適宜軸方向の荷重を付与し、供試体Ｗ１、Ｗ２、Ｗ３、…に作用する応力状態を必要に応じて変化させるようにしてもよい。また、上記実施形態では、同一形状の複数の供試体Ｗ１、Ｗ２、Ｗ３、…を用いた場合について説明しているが、異なる寸法の供試体を用いることもできる。この場合、図２中に仮想線で示すように、大径の供試体Ｗ５´、Ｗ９´、Ｗ１０´に対して、供試体セル１５の下部キャップ３１及び上部キャップ３２の通水管路２６及び排水管路２８の接続部を供試体セル１５の中心から偏心させて配置し、適宜その回転位置を調整することより、三軸セル１４の下部ベース板２１及び上部ベース板２２側の通水管路２６及び排水管路２８の配置を変更しなくても、大径の供試体Ｗ５´、Ｗ９´、Ｗ１０´を互いに干渉させることなく、また、側板１９に干渉させることなく、効率よく配置することができる。   In the above-described embodiment, an appropriate axial load is applied to the specimen cell 15 in the triaxial cell 14 using a weight or the like, and a stress state acting on the specimens W1, W2, W3,. You may make it change according to it. Moreover, although the said embodiment demonstrated the case where the some test body W1, W2, W3, ... of the same shape was used, the test body of a different dimension can also be used. In this case, as shown by phantom lines in FIG. 2, for the large-diameter specimens W5 ′, W9 ′, and W10 ′, the water passage 26 and drainage of the lower cap 31 and the upper cap 32 of the specimen cell 15 By connecting the connecting portion of the pipe line 28 so as to be eccentric from the center of the specimen cell 15 and adjusting the rotation position as appropriate, the water flow pipe line 26 on the lower base plate 21 and upper base plate 22 side of the triaxial cell 14 is arranged. And without changing the arrangement of the drain pipe 28, the large-diameter specimens W5 ', W9', W10 'can be efficiently arranged without interfering with each other and without interfering with the side plate 19. it can.

本発明の一実施形態に係る三軸圧密透水試験装置の図２における三軸セルのＡ−Ａ線による縦断面を含む概略図である。It is the schematic including the longitudinal cross section by the AA line of the triaxial cell in FIG. 2 of the triaxial consolidation water permeability test apparatus concerning one embodiment of the present invention. 図１に示す三軸圧密透水試験装置における三軸セル上の複数の供試体セルの配置を示す概略平面図である。It is a schematic plan view which shows arrangement | positioning of the some test body cell on a triaxial cell in the triaxial consolidation water permeability test apparatus shown in FIG. 従来の三軸圧密透水試験装置の概略図である。It is the schematic of the conventional triaxial consolidation water permeability test apparatus.

符号の説明Explanation of symbols

１３ 三軸圧密透水試験装置、１４ 三軸セル（圧力容器）、１５ 供試体セル、１６ 加圧給水手段（加圧手段）、１７ スタンドパイプ（通水手段、測定手段）、２６ 通水管路、Ｗ１、Ｗ２、Ｗ３、… 供試体
13 Triaxial Consolidation Permeability Test Equipment, 14 Triaxial Cell (Pressure Vessel), 15 Specimen Cell, 16 Pressurized Water Supply Means (Pressure Means), 17 Stand Pipe (Water Passage Means, Measuring Means), 26 Water Pipeline, W1, W2, W3, ... Specimen

Claims (4)

単一の圧力容器と、供試体を収容して前記圧力容器内に配置される複数の供試体セルと、前記圧力容器内に加圧水を供給して該圧力容器内を加圧する加圧手段と、前記複数の供試体セルにそれぞれ通水する通水手段と、該通水手段によって前記供試体セルに通水された水の流量を測定する測定手段とを備えたことを特徴とする三軸圧密透水試験装置。 A single pressure vessel, a plurality of test sample cells that are accommodated in the pressure vessel and accommodated in the pressure vessel, and a pressurizing means that pressurizes the pressure vessel by supplying pressurized water into the pressure vessel, Triaxial compaction characterized by comprising water passing means for passing water to each of the plurality of specimen cells, and measuring means for measuring the flow rate of water passed through the specimen cell by the water passing means. Permeability test equipment. 前記複数の供試体セルは、異なる寸法の供試体を収容することを特徴とする請求項１に記載の三軸圧密透水試験装置。 The triaxial consolidated water permeability test apparatus according to claim 1, wherein the plurality of specimen cells contain specimens having different dimensions. 前記圧力容器の底部には、前記通水手段によって前記複数の供試体セルのそれぞれに通水するための複数の通水管路が設けられ、前記複数の供試体セルには、前記複数の通水管路に接続する接続部が設けられ、該接続部は、前記供試体セルの中心から偏心して配置されていることを特徴とする請求項１又は２に記載の三軸圧密透水試験装置。 The bottom of the pressure vessel is provided with a plurality of water conduits for passing water to each of the plurality of specimen cells by the water passage means, and the plurality of specimen pipes include the plurality of water pipes. 3. The triaxial consolidation permeability test apparatus according to claim 1, wherein a connection part connected to the road is provided, and the connection part is arranged eccentrically from a center of the specimen cell. 単一の圧力容器内に、供試体を収容した複数の供試体セルを配置し、前記圧力容器内に加圧水を供給して該加圧容器内を加圧し、その圧力によって三軸応力状態下にある前記複数の供試体セルにそれぞれ通水して透水試験を行うことを特徴とする三軸圧密透水試験方法。
A plurality of specimen cells containing specimens are arranged in a single pressure vessel, pressurized water is supplied into the pressure vessel to pressurize the pressurized vessel, and the pressure causes a triaxial stress state. A triaxial consolidation permeability test method, wherein a permeability test is performed by passing water through each of the plurality of specimen cells.
JP2005338630A 2005-11-24 2005-11-24 Triaxial consolidation permeability test device and test method Pending JP2007147315A (en)

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