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JP4523396B2 - Bentonite addition rate measuring device and method for determining water shielding in water shielding layer - Google Patents
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JP4523396B2 - Bentonite addition rate measuring device and method for determining water shielding in water shielding layer - Google Patents

Bentonite addition rate measuring device and method for determining water shielding in water shielding layer Download PDF

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JP4523396B2
JP4523396B2 JP2004351415A JP2004351415A JP4523396B2 JP 4523396 B2 JP4523396 B2 JP 4523396B2 JP 2004351415 A JP2004351415 A JP 2004351415A JP 2004351415 A JP2004351415 A JP 2004351415A JP 4523396 B2 JP4523396 B2 JP 4523396B2
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addition rate
bentonite
dielectric constant
water shielding
mixed soil
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JP2006162336A (en
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豪治 戸村
雅夫 中田
好夫 勝沼
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Sumitomo Mitsui Construction Co Ltd
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Description

本発明は、産業廃棄物処分場などの構築物において、ベントナイト混合土を用いて施工される遮水層に対して、施工後にベントナイト量を測定することの出来る、ベントナイト添加率測定装置及び遮水層における遮水性判定方法に関する。   The present invention relates to a bentonite addition rate measuring device and a water shielding layer capable of measuring the amount of bentonite after construction with respect to a water shielding layer constructed using bentonite mixed soil in a construction such as an industrial waste disposal site. The present invention relates to a method for determining water shielding.

この種の構築物においては、環境汚染や公害防止などの観点から、遮水層の遮水性が所定の性能を有している必要がある。即ち、遮水層の透水係数が遮水層の全面について、所定の透水係数以下であることが望まれる。遮水層の遮水性能を示す透水係数は、当該遮水層を造成する際に使用したベントナイト混合土における、ベントナイト添加率と相関があることから、施工された遮水層が所定の透水係数を保持しているか否かを判定するためには、施工されたベントナイト混合土のベントナイト添加率を測定することにより、行うことが出来る。     In this type of structure, the water shielding layer needs to have a predetermined performance from the viewpoint of environmental pollution and pollution prevention. That is, it is desirable that the water permeability coefficient of the water shielding layer is not more than a predetermined water permeability coefficient with respect to the entire surface of the water shielding layer. The water permeability coefficient indicating the water shielding performance of the water shielding layer is correlated with the bentonite addition rate in the bentonite mixed soil used when creating the water shielding layer. Can be determined by measuring the bentonite addition rate of the installed bentonite mixed soil.

ベントナイト添加率を測定する方法は、各種提案されている（特許文献１〜６）が、いずれもサンプル採取から添加率を得るまでの測定作業に長時間を要したり、誤差が大きかったりなどの欠点があり、いまだ実用的なレベルには達していない。     Various methods for measuring the bentonite addition rate have been proposed (Patent Documents 1 to 6), but all of them require a long time for the measurement work from obtaining a sample to obtaining the addition rate, and the error is large. There are drawbacks, and it has not yet reached a practical level.

特開２００２−２１２９３９号公報JP 2002-212939 A 特開２００１−４６１９号公報JP 2001-4619 A 特開２０００−３４６８１９号公報JP 2000-346819 A 特開平１１−６４２０６号公報JP-A-11-64206 特開平８−１１０２９０号公報JP-A-8-110290 特開平９−３１８５４３号公報JP-A-9-318543

また、一般的にこうした産業廃棄物処分場は広大な面積で造成されており、検査すべき遮水層の面積も極めて大きく、造成された遮水層がその全面に渡って所定の遮水性能を維持しているかを測定するためには、出来るだけ多くの測定点でベントナイト添加率が所定の値を維持しているか否かを測定する必要があるが、こうした多点測定を短時間で行うことが可能なベントナイト添加率測定装置は未だ開発されていないのが現状である。     In general, such an industrial waste disposal site is constructed in a large area, and the area of the impermeable layer to be inspected is extremely large, and the constructed impermeable layer has a predetermined impermeable performance over the entire surface. In order to measure whether the bentonite addition rate is maintained at a predetermined value at as many measurement points as possible, it is necessary to perform such multipoint measurement in a short time. Currently, no bentonite addition rate measuring device has been developed yet.

前記の事情に鑑み、本発明は、施工済み遮水層において、ベントナイト添加率を多くの測定地点で短時間に測定することの出来るベントナイト添加率測定装置及び遮水層における遮水性判定方法を提供することを目的とする。   In view of the above circumstances, the present invention provides a bentonite addition rate measuring apparatus and a method for determining water impermeability in a water shielding layer that can measure the bentonite addition rate in a short time at many measurement points in a constructed water shielding layer. The purpose is to do.

請求項１の発明は、ベントナイト混合土から造成される遮水層（１１）の、ベントナイト添加率を測定するベントナイト添加率測定装置（１）において、
前記ベントナイト混合土の誘電率を測定して出力する誘電率測定手段（６）、
前記ベントナイト混合土の種類別の、誘電率とベントナイト添加率との関係を示した添加率判定データ（ＤＡＴＡ）を格納するメモリ（５）、
サンプル地点の誘電率とベントナイト添加率を入力する入力部（３）、
前記入力部（３）から入力されるサンプル地点の誘電率とベントナイト添加率から、前記添加率判定データ（ＤＡＴＡ）を参照して、前記遮水層を構成するベントナイト混合土の種類に応じた前記添加率判定データを選択する判定データ抽出手段（７）、及び、
前記誘電率測定装置から入力される前記遮水層の表面に設定された測定地点の誘電率及び前記判定データ抽出手段により選択された前記添加率判定データに基づいて、前記測定地点のベントナイト添加率を演算して、その結果を出力する、ベントナイト添加率演算出力手段（７，１０）、
を有して構成される。 Invention of Claim 1 is the bentonite addition rate measuring device (1) for measuring the bentonite addition rate of the water shielding layer (11) formed from bentonite mixed soil,
A dielectric constant measuring means (6) for measuring and outputting the dielectric constant of the bentonite mixed soil;
A memory (5) for storing addition rate determination data (DATA) indicating a relationship between a dielectric constant and a bentonite addition rate for each type of the bentonite mixed soil;
Input section (3) for inputting the dielectric constant and bentonite addition rate at the sample point,
From the dielectric constant and bentonite addition rate of the sample point input from the input unit (3), referring to the addition rate determination data (DATA), the type according to the type of bentonite mixed soil constituting the water shielding layer Determination data extraction means (7) for selecting addition rate determination data, and
Based on the dielectric constant of the measurement point set on the surface of the water shielding layer input from the dielectric constant measuring device and the addition rate determination data selected by the determination data extraction means, the bentonite addition rate of the measurement point And bentonite addition rate calculation output means (7, 10),
It is comprised.

また、請求項２の発明は、前記入力部から入力されるサンプル地点の誘電率とベントナイト添加率から、前記添加率判定データを参照して、前記遮水層を構成するベントナイト混合土の種類を判定する混合土種判定手段（７）を有し、
前記判定データ抽出手段は、前記混合土種判定手段により判定されたベントナイト混合土の種類に対応した前記添加率判定データを選択することを特徴として構成される。 The invention of claim 2 refers to the addition rate determination data from the dielectric constant and bentonite addition rate of the sample point input from the input unit, and determines the type of bentonite mixed soil constituting the water shielding layer. Having mixed soil type judging means (7) for judging,
The determination data extraction unit is configured to select the addition rate determination data corresponding to the type of bentonite mixed soil determined by the mixed soil type determination unit.

また、請求項３の発明は、遮水層における遮水性判定方法の発明であって、ベントナイト混合土から造成される遮水層の、ベントナイト添加率を、前記遮水層の表面に複数設定された測定地点においてそれぞれ測定して、前記遮水層の遮水性を判定する遮水性の判定方法において、
前記ベントナイト混合土の種類別の、誘電率とベントナイト添加率との関係を示した添加率判定データを準備しておき、
遮水層に設定されたサンプル地点の誘電率とベントナイト添加率を測定し、
該サンプル地点の誘電率とベントナイト添加率から、当該遮水層を構成するベントナイト混合土の種類に応じた前記添加率判定データを選択し、
前記複数の測定地点における誘電率を測定し、それら測定された誘電率及び前記選択された添加率判定データに基づいて、前記測定地点のベントナイト添加率を演算し、
それら演算された複数の測定地点におけるベントナイト添加率から前記遮水層の遮水性能を判定するようにして、
構成される。 Further, the invention of claim 3 is an invention of a method for judging water impermeability in a water impervious layer, wherein a plurality of bentonite addition rates of a water impervious layer formed from bentonite mixed soil are set on the surface of the water impervious layer. In the water-imperviousness determination method for measuring the water-impervious layer by measuring at each measurement point,
Prepared addition rate judgment data showing the relationship between the dielectric constant and the bentonite addition rate for each type of bentonite mixed soil,
Measure the dielectric constant and bentonite addition rate at the sample point set in the water shielding layer,
From the dielectric constant and bentonite addition rate of the sample point, select the addition rate determination data according to the type of bentonite mixed soil constituting the water shielding layer,
Measure the dielectric constant at the plurality of measurement points, based on the measured dielectric constant and the selected addition rate determination data, calculate the bentonite addition rate at the measurement point,
In order to determine the water shielding performance of the water shielding layer from the bentonite addition rate at a plurality of measurement points calculated,
Composed.

なお、括弧内の符号等は、図面と対照するためのものであり、これは、発明の理解を容易にするための便宜的なものであって、特許請求の範囲に何等影響を及ぼすものではない。   Note that the reference numerals in parentheses are for comparison with the drawings, and are for convenience to facilitate understanding of the invention and do not affect the scope of the claims. Absent.

以上述べたように、請求項１に係る発明によれば、ベントナイト添加率を測定すべき遮水層のベントナイト添加率を、誘電率測定装置（６）により各測定地点の誘電率を順次測定することにより直ちに演算して求めることが出来、施工済み遮水層において、ベントナイト添加率を多くの測定地点で短時間に測定することの出来る。   As described above, according to the invention according to claim 1, the bentonite addition rate of the water shielding layer whose bentonite addition rate is to be measured, and the dielectric constant at each measurement point are sequentially measured by the dielectric constant measuring device (6). Thus, the bentonite addition rate can be measured in a short time at many measurement points in the constructed impermeable layer.

請求項２の発明によれば、混合土種判定手段により、遮水層を構成するベントナイト混合土の種類を直ちに知ることが出来る。     According to invention of Claim 2, the kind of bentonite mixed soil which comprises a water-impervious layer can be known immediately by the mixed soil type determination means.

請求項３の発明によれば、多数の測定地点のベントナイト添加率を求めることにより、広大な遮水層の全面に渡る遮水性能の測定を短時間に行うことが出来る。     According to the invention of claim 3, by measuring the bentonite addition rate at a large number of measurement points, it is possible to measure the water shielding performance over the entire surface of the vast water shielding layer in a short time.

以下、本発明の実施の形態を図面に基づいて説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

図１は、ベントナイト添加率測定装置の一例を示すブロック図、図２は含水比別のベントナイト添加率と誘電率との関係を示す図、図３は含水比が１０％のベントナイト混合土を使用した場合の、締固め度別に測定したベントナイト混合土のベントナイト添加率と誘電率との関係を示す図、図４は含水比が１２％のベントナイト混合土を使用した場合の、締固め度別に測定したベントナイト混合土のベントナイト添加率と誘電率との関係を示す図、図５は、図１のベントナイト添加率測定装置に実装される、誘電率とベントナイト添加率との関係を示す添加率判定データの一例を示す図。     Fig. 1 is a block diagram showing an example of a bentonite addition rate measuring device, Fig. 2 is a diagram showing the relationship between bentonite addition rate and dielectric constant according to water content ratio, and Fig. 3 is a bentonite mixed soil having a water content rate of 10%. Fig. 4 shows the relationship between the bentonite addition rate of the bentonite mixed soil and the dielectric constant measured according to the compaction degree. Fig. 4 shows the measurement according to the compaction degree when the bentonite mixed soil having a water content of 12% is used. FIG. 5 is a diagram showing the relationship between the bentonite addition rate and the dielectric constant of the bentonite mixed soil, FIG. 5 is an addition rate determination data showing the relationship between the dielectric constant and the bentonite addition rate, which is mounted on the bentonite addition rate measuring apparatus of FIG. The figure which shows an example.

ベントナイト添加率測定装置１は、図１に示すように、主制御部２を有しており、主制御部２には、バス線４を介してキーボードなどの入力部３，判定データメモリ５，誘電率測定装置６、添加率演算部７及びディスプレイ等の出力部１０などが接続している。     As shown in FIG. 1, the bentonite addition rate measuring apparatus 1 has a main control unit 2. The main control unit 2 includes an input unit 3 such as a keyboard via a bus line 4, a determination data memory 5, and the like. The dielectric constant measuring device 6, the addition rate calculation unit 7, the output unit 10 such as a display, and the like are connected.

ベントナイト添加率測定装置１は、以上のような構成を有するので、ベントナイト添加率測定装置１を用いて、廃棄物処分場の底面やのり面に、ベントナイト混合土により構築された遮水層１１のベントナイト量測定を、ベントナイト混合土に対するベントナイト添加率により測定する際には、まず、測定すべき遮水層１１の適宜な地点で、サンプルを１カ所から数カ所、採取し、当該サンプルを分析して、遮水層１１を構成するベントナイト混合土におけるベントナイト添加率を測定する。このベントナイト添加率の測定は、公知の手法で行なう。     Since the bentonite addition rate measuring device 1 has the above-described configuration, the bentonite addition rate measuring device 1 is used to form a water-impervious layer 11 constructed of bentonite mixed soil on the bottom surface or the glue surface of the waste disposal site. When measuring the amount of bentonite by the bentonite addition rate with respect to the bentonite mixed soil, first, samples are taken from one place to several places at an appropriate point of the water shielding layer 11 to be measured, and the sample is analyzed. The bentonite addition rate in the bentonite mixed soil constituting the water shielding layer 11 is measured. This bentonite addition rate is measured by a known method.

こうして、測定すべき遮水層１１の適宜な地点でのベントナイト混合土のベントナイト添加率が、採取したサンプルから判明したところで、当該判明したベントナイト添加率を、ベントナイト添加率測定装置１の入力部３を介して主制御部２に入力する。     Thus, when the bentonite addition rate of the bentonite mixed soil at an appropriate point of the water shielding layer 11 to be measured is found from the collected sample, the bentonite addition rate is input to the input unit 3 of the bentonite addition rate measuring device 1. To the main control unit 2.

また、判定データメモリ５には、添加率判定データＤＡＴＡが格納されている。添加率判定データＤＡＴＡは、図５に示すように、遮水層１１の構築に使用されるベントナイト混合土を複数種類に分類し、それら分類されたベントナイト混合土別に、誘電率とベントナイト添加率との関係を示したものである。一般的に、遮水層１１の構築に使用されるベントナイト混合土は、誘電率の観点から見た場合、数種類に分類されることが判っている。     The determination data memory 5 stores addition rate determination data DATA. As shown in FIG. 5, the addition rate determination data DATA classifies the bentonite mixed soil used for the construction of the water-impervious layer 11 into a plurality of types, and for each of the classified bentonite mixed soils, the dielectric constant, bentonite addition rate, and This shows the relationship. In general, it has been found that bentonite mixed soil used for construction of the water shielding layer 11 is classified into several types from the viewpoint of dielectric constant.

ところで、遮水層１１を構成するベントナイト混合土は、その締固め度、含水比及びベントナイト添加率に応じてその誘電率が変化する。図２に、締固め度Ｄｃを９５％とした場合の、含水比Ｗをパラメータとした、ベントナイト混合土の誘電率とベントナイト添加率との関係を示す。     By the way, the dielectric constant of the bentonite mixed soil constituting the water shielding layer 11 varies depending on the degree of compaction, the water content ratio, and the bentonite addition rate. FIG. 2 shows the relationship between the dielectric constant of bentonite mixed soil and the bentonite addition rate with the water content ratio W as a parameter when the compaction degree Dc is 95%.

また、図３及び図４に、ベントナイト混合土の含水比Ｗをそれぞれ１０％及び１２％とした場合の、締固め度Ｄｃをパラメータとした、ベントナイト混合土の誘電率とベントナイト添加率との関係を示す。     3 and 4 show the relationship between the permittivity of bentonite mixed soil and the bentonite addition rate with the compaction degree Dc as a parameter when the water content ratio W of the bentonite mixed soil is 10% and 12%, respectively. Indicates.

通常、産業廃棄物処分場の遮水層１１としては、含水比Ｗが１０〜１６％、締固め度Ｄｃが８５〜９５％で施工されることが多く、また使用されるベントナイト混合土の種類も数種類と限られている。そこで、遮水層構築に使用される、数種類のベントナイト混合土について、上記した図２乃至図４で示したような各種の締固め度及び含水比における誘電率とベントナイト添加率の測定結果を求め、それらから、遮水層で使用されるベントナイト混合土の含水比Ｗが１０〜１６％、締固め度Ｄｃが８５〜９５％の範囲について、ベントナイト混合土の種類別に、複数の測定実験（図５の場合は、各ベントナイト混合土別に１００（＝Ｎ）測定）の測定結果の平均値を求めたのが、図５に示す添加率判定データＤＡＴＡである。     Usually, the water-impervious layer 11 in an industrial waste disposal site is often constructed with a water content W of 10 to 16% and a compaction degree Dc of 85 to 95%, and the type of bentonite mixed soil used. There are only a few types. Therefore, measurement results of dielectric constant and bentonite addition rate at various compaction degrees and water content ratios as shown in FIGS. 2 to 4 are obtained for several types of bentonite mixed soil used for construction of a water shielding layer. In addition, a plurality of measurement experiments are performed for each type of bentonite mixed soil in a range where the water content ratio W of the bentonite mixed soil used in the water shielding layer is 10 to 16% and the compaction degree Dc is 85 to 95% (see FIG. In the case of 5, the average value of the measurement results of 100 (= N) for each bentonite mixed soil was obtained as addition rate determination data DATA shown in FIG.

そこで、前述のように、サンプル採取及び分析により求められたベントナイト添加率をベントナイト添加率測定装置１の入力部３から入力すると共に、その際のサンプル地点の誘電率を誘電率測定装置６により測定する。サンプル地点の遮水層１１の誘電率が誘電率測定装置６から添加率演算部７に入力されると、添加率演算部７は、入力されたサンプル地点のベントナイト添加率とその際の誘電率測定装置６により測定された誘電率から、判定データメモリ５内に格納された添加率判定データＤＡＴＡを参照して、これからの測定に際して使用すべき誘電率とベントナイト添加率との関連を示すデータとして、どの種類のベントナイト混合土についてのデータを使用するかを決定する。即ち、これから測定すべき遮水層１１のベントナイト混合土の種類を、サンプル地点の誘電率とベントナイト添加率から判定する。     Therefore, as described above, the bentonite addition rate obtained by sampling and analysis is input from the input unit 3 of the bentonite addition rate measuring device 1 and the dielectric constant at the sample point at that time is measured by the permittivity measuring device 6. To do. When the dielectric constant of the water shielding layer 11 at the sample point is input from the dielectric constant measuring device 6 to the addition rate calculation unit 7, the addition rate calculation unit 7 inputs the bentonite addition rate at the sample point and the dielectric constant at that time. By referring to the addition rate determination data DATA stored in the determination data memory 5 from the dielectric constant measured by the measuring device 6, as data indicating the relationship between the dielectric constant to be used in the future measurement and the bentonite addition rate Determine what kind of bentonite mixed soil data to use. That is, the type of bentonite mixed soil of the water shielding layer 11 to be measured is determined from the dielectric constant and the bentonite addition rate at the sample point.

こうして、例えば、添加率演算部７が、入力されたサンプル地点のベントナイト添加率と誘電率測定装置６で測定された当該サンプル地点の誘電率から、遮水層１１の構築に使用されているベントナイト混合土が、添加率判定データＤＡＴＡにおいて、ベントナイト混合土Ｂに分類されるデータと対応するものと判定した場合には、測定に使用すべき添加率判定データＤＡＴＡとして、図５に示す、ベントナイト混合土Ｂに関するデータＤＡＴＡを採用する。     Thus, for example, the bentonite used in the construction of the water shielding layer 11 from the input bentonite addition rate at the sample point and the dielectric constant at the sample point measured by the dielectric constant measuring device 6 is used by the addition rate calculation unit 7. When it is determined that the mixed soil corresponds to the data classified as bentonite mixed soil B in the addition rate determination data DATA, the addition rate determination data DATA to be used for measurement is shown in FIG. Data DATA about Soil B is adopted.

この状態で、ベントナイト添加率測定装置１を持って、構築済みの産業廃棄物処分場の遮水層１１の表面に設定された多数の測定地点に、図１に示す誘電率測定装置６を遮水層１１の表面１１ａに押しつける形で設置し、当該測定地点の誘電率を測定する。誘電率測定装置６で測定された誘電率は、添加率演算部７に出力され、添加率演算部７は、当該測定された誘電率と、ベントナイト混合土Ｂの添加率判定データＤＡＴＡから、対応するベントナイト添加率を演算し、得られたベントナイト添加率を、出力部１０に出力する。     In this state, with the bentonite addition rate measuring device 1, the dielectric constant measuring device 6 shown in FIG. 1 is shielded at many measurement points set on the surface of the water shielding layer 11 of the constructed industrial waste disposal site. It installs in the form pressed against the surface 11a of the water layer 11, and the dielectric constant of the said measurement point is measured. The dielectric constant measured by the dielectric constant measuring device 6 is output to the addition rate calculation unit 7, and the addition rate calculation unit 7 responds from the measured dielectric constant and the addition rate determination data DATA of the bentonite mixed soil B. The bentonite addition rate is calculated, and the resulting bentonite addition rate is output to the output unit 10.

オペレータは、出力部１０に印字又は表示された当該測定地点のベントナイト添加率を見て、当該測定地点のベントナイト添加率、従ってベントナイト量が遮水層１１の構築に適した値を満足しているか否かを判断する。なお、所定のベントナイト添加率の基準値を図示しないメモリ中に格納しておき、当該測定地点のベントナイト添加率が遮水層１１としての基準値に達しているか否かを判定して、その判定結果をベントナイト添加率と共に（又は、ベントナイト添加率の出力に代えて）出力部１０に出力するようにしてもよい。     The operator looks at the bentonite addition rate at the measurement point printed or displayed on the output unit 10, and does the bentonite addition rate at the measurement point, and thus the bentonite amount, satisfy a value suitable for the construction of the water shielding layer 11? Judge whether or not. In addition, the reference value of a predetermined bentonite addition rate is stored in a memory (not shown), and it is determined whether or not the bentonite addition rate at the measurement point has reached the reference value as the water shielding layer 11. The result may be output to the output unit 10 together with the bentonite addition rate (or instead of the output of the bentonite addition rate).

こうして、ある測定地点の遮水層１１のベントナイト混合土におけるベントナイト添加率が判明したところで、オペレータは順次次の測定地点に移動し、同様な手順でそれらの測定地点のベントナイト添加率を求めてゆき、廃棄物処分場の全体の遮水層１１全面に渡り、多数の測定地点のベントナイト添加率を連続的に測定してゆく。遮水層１１のベントナイト混合土の種類は、既にサンプル地点での誘電率とベントナイト添加率から判定されているので、その後の各測定地点のベントナイト添加率の測定は、判定されたベントナイト混合土の種類に対応して選択された添加率判定データＤＡＴＡと各測定地点で誘電率測定装置６により測定される誘電率から、直ちに演算することが出来る。     Thus, when the bentonite addition rate in the bentonite mixed soil of the water shielding layer 11 at a certain measurement point is found, the operator sequentially moves to the next measurement point and obtains the bentonite addition rate at those measurement points in the same procedure. The bentonite addition rate at a number of measurement points is continuously measured over the entire surface of the water shielding layer 11 of the entire waste disposal site. Since the kind of the bentonite mixed soil of the water shielding layer 11 has already been determined from the dielectric constant and bentonite addition rate at the sample point, the measurement of the bentonite addition rate at each subsequent measurement point is performed on the determined bentonite mixed soil. It is possible to immediately calculate from the addition rate determination data DATA selected corresponding to the type and the dielectric constant measured by the dielectric constant measuring device 6 at each measurement point.

こうして、産業廃棄物処分場の遮水層１１の多数の測定地点において、ベントナイト添加率を測定することにより、構築された遮水層１１の遮水性能を、当該遮水層１１の全面について、詳細に判定することが出来る。例えば、ある測定地点のベントナイト添加率が、所定の基準値を下回る値で測定された場合には、当該部分に、ベントナイトの混合ムラがあるものと判定されるので、直ちに当該部分のベントナイト混合土を入れ替えて、補修工事を行うことが出来、信頼性の高い施工が可能となる。     Thus, by measuring the bentonite addition rate at a number of measurement points of the water shielding layer 11 of the industrial waste disposal site, the water shielding performance of the constructed water shielding layer 11 can be obtained over the entire surface of the water shielding layer 11. It can be judged in detail. For example, when the bentonite addition rate at a certain measurement point is measured at a value lower than a predetermined reference value, it is determined that there is uneven mixing of bentonite in the part, so the bentonite mixed soil of the part is immediately It is possible to perform repair work by exchanging, and highly reliable construction is possible.

遮水性能を適切に担保した形の信頼性の高い産業廃棄物処分場の施工に利用することが出来る。     It can be used for the construction of a highly reliable industrial waste disposal site in a form that properly guarantees the water shielding performance.

図１は、ベントナイト添加率測定装置の一例を示すブロック図。FIG. 1 is a block diagram showing an example of a bentonite addition rate measuring apparatus. 図２は含水比別のベントナイト添加率と誘電率との関係を示す図。FIG. 2 is a graph showing the relationship between the bentonite addition rate and the dielectric constant according to the water content ratio. 図３は含水比が１０％のベントナイト混合土を使用した場合の、締固め度別に測定したベントナイト混合土のベントナイト添加率と誘電率との関係を示す図。FIG. 3 is a graph showing the relationship between the bentonite addition rate of the bentonite mixed soil and the dielectric constant measured according to the degree of compaction when the bentonite mixed soil having a water content of 10% is used. 図４は含水比が１２％のベントナイト混合土を使用した場合の、締固め度別に測定したベントナイト混合土のベントナイト添加率と誘電率との関係を示す図。FIG. 4 is a view showing the relationship between the bentonite addition rate of the bentonite mixed soil and the dielectric constant measured according to the degree of compaction when the bentonite mixed soil having a water content of 12% is used. 図５は、図１のベントナイト添加率測定装置に実装される、誘電率とベントナイト添加率との関係を示す添加率判定データの一例を示す図。FIG. 5 is a diagram illustrating an example of addition rate determination data indicating a relationship between a dielectric constant and a bentonite addition rate, which is mounted on the bentonite addition rate measuring apparatus of FIG. 1.

符号の説明Explanation of symbols

１……ベントナイト添加率測定装置
３……入力部
５……メモリ
６……誘電率測定装置
７……添加率演算部
１０……出力部
１１……遮水層
ＤＡＴＡ……添加率判定データ DESCRIPTION OF SYMBOLS 1 ... Bentonite addition rate measuring device 3 ... Input unit 5 ... Memory 6 ... Dielectric constant measuring device 7 ... Addition rate calculating unit 10 ... Output unit 11 ... Impermeable layer DATA ... Addition rate judgment data

Claims (3)

ベントナイト混合土から造成される遮水層の、ベントナイト添加率を測定するベントナイト添加率測定装置において、
前記ベントナイト混合土の誘電率を測定して出力する誘電率測定手段、
前記ベントナイト混合土の種類別の、誘電率とベントナイト添加率との関係を示した添加率判定データを格納するメモリ、
サンプル地点の誘電率とベントナイト添加率を入力する入力部、
前記入力部から入力されるサンプル地点の誘電率とベントナイト添加率から、前記添加率判定データを参照して、前記遮水層を構成するベントナイト混合土の種類に応じた前記添加率判定データを選択する判定データ抽出手段、及び、
前記誘電率測定装置から入力される前記遮水層の表面に設定された測定地点の誘電率及び前記判定データ抽出手段により選択された前記添加率判定データに基づいて、前記測定地点のベントナイト添加率を演算して、その結果を出力する、ベントナイト添加率演算出力手段、
を有する、ベントナイト添加率測定装置。 In the bentonite addition rate measuring device that measures the bentonite addition rate of the water shielding layer formed from bentonite mixed soil,
Dielectric constant measuring means for measuring and outputting the dielectric constant of the bentonite mixed soil,
A memory for storing addition rate determination data indicating a relationship between a dielectric constant and a bentonite addition rate for each type of the bentonite mixed soil;
Input section for inputting the dielectric constant and bentonite addition rate at the sample location,
From the dielectric constant and the bentonite addition rate of the sample point input from the input unit, refer to the addition rate determination data, and select the addition rate determination data according to the type of bentonite mixed soil constituting the water shielding layer Determination data extraction means, and
Based on the dielectric constant of the measurement point set on the surface of the water shielding layer input from the dielectric constant measuring device and the addition rate determination data selected by the determination data extraction means, the bentonite addition rate of the measurement point , Bentonite addition rate calculation output means for outputting the result,
A bentonite addition rate measuring device. 前記入力部から入力されるサンプル地点の誘電率とベントナイト添加率から、前記添加率判定データを参照して、前記遮水層を構成するベントナイト混合土の種類を判定する混合土種判定手段を有し、
前記判定データ抽出手段は、前記混合土種判定手段により判定されたベントナイト混合土の種類に対応した前記添加率判定データを選択することを特徴とする、
請求項１記載のベントナイト添加率測定装置。 With reference to the addition rate determination data from the dielectric constant and bentonite addition rate of the sample point input from the input unit, there is a mixed soil type determination means for determining the type of bentonite mixed soil constituting the water shielding layer. And
The determination data extraction unit selects the addition rate determination data corresponding to the type of bentonite mixed soil determined by the mixed soil type determination unit,
The bentonite addition rate measuring apparatus according to claim 1. ベントナイト混合土から造成される遮水層の、ベントナイト添加率を、前記遮水層の表面に複数設定された測定地点においてそれぞれ測定して、前記遮水層の遮水性を判定する遮水性の判定方法において、
前記ベントナイト混合土の種類別の、誘電率とベントナイト添加率との関係を示した添加率判定データを準備しておき、
遮水層に設定されたサンプル地点の誘電率とベントナイト添加率を測定し、
該サンプル地点の誘電率とベントナイト添加率から、当該遮水層を構成するベントナイト混合土の種類に応じた前記添加率判定データを選択し、
前記複数の測定地点における誘電率を測定し、それら測定された誘電率及び前記選択された添加率判定データに基づいて、前記測定地点のベントナイト添加率を演算し、
それら演算された複数の測定地点におけるベントナイト添加率から前記遮水層の遮水性能を判定するようにして、
構成した、遮水層における遮水性判定方法。
Determination of water impermeability for determining the water impermeability of the water impervious layer by measuring the bentonite addition rate of the water impervious layer formed from the bentonite mixed soil at each of measurement points set on the surface of the water impervious layer. In the method
Prepared addition rate judgment data showing the relationship between the dielectric constant and the bentonite addition rate for each type of bentonite mixed soil,
Measure the dielectric constant and bentonite addition rate at the sample point set in the water shielding layer,
From the dielectric constant and bentonite addition rate of the sample point, select the addition rate determination data according to the type of bentonite mixed soil constituting the water shielding layer,
Measure the dielectric constant at the plurality of measurement points, based on the measured dielectric constant and the selected addition rate determination data, calculate the bentonite addition rate at the measurement point,
In order to determine the water shielding performance of the water shielding layer from the bentonite addition rate at a plurality of measurement points calculated,
A constructed method for determining water shielding in a water shielding layer.
JP2004351415A 2004-12-03 2004-12-03 Bentonite addition rate measuring device and method for determining water shielding in water shielding layer Expired - Fee Related JP4523396B2 (en)

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