JP2016017332A - Underground tank and cut-off method for the same - Google Patents

Underground tank and cut-off method for the same Download PDF

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JP2016017332A
JP2016017332A JP2014141312A JP2014141312A JP2016017332A JP 2016017332 A JP2016017332 A JP 2016017332A JP 2014141312 A JP2014141312 A JP 2014141312A JP 2014141312 A JP2014141312 A JP 2014141312A JP 2016017332 A JP2016017332 A JP 2016017332A
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water stop
bottom plate
underground
plate
underground tank
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JP6384714B2 (en
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幹雄 柏木
Mikio Kashiwagi
幹雄 柏木
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Shimizu Construction Co Ltd
Shimizu Corp
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Shimizu Construction Co Ltd
Shimizu Corp
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Abstract

PROBLEM TO BE SOLVED: To provide an underground tank capable of suppressing an area of reinforcement of a base, and a cut-off method for the same.SOLUTION: An underground tank arranged inside a cylindrical continuous underground wall 2 provided in the ground includes a base A, a side wall that is extended upward from an edge of the base A, a body roof that covers an upper part of the side wall, and a cut-off structure 10 that is provided in a boundary part K between the base and the continuous underground wall. The cut-off structure 10 is arranged above an undersurface A2 of the base A and in a position to vertically straddle a freezing line S1 of the boundary part K.SELECTED DRAWING: Figure 3

Description

本発明は、地下タンク及び地下タンクの止水方法に関するものである。   The present invention relates to an underground tank and a method for stopping water in the underground tank.

従来より、液化天然ガス等の低温液体は、地中に設けられた地下タンク内等で貯蔵されている。この地下タンクとして、地中に設けられた地中連続壁で囲まれた空間に配置された底版と、底版の縁部から上方に延びる側壁と、側壁の上端に支持されたドーム状のドーム屋根と、を備えたものが提案されている（下記の特許文献１参照）。   Conventionally, low-temperature liquids such as liquefied natural gas have been stored in underground tanks provided in the ground. As this underground tank, a bottom slab arranged in a space surrounded by underground continuous walls provided in the ground, a side wall extending upward from the edge of the bottom slab, and a dome-shaped dome roof supported on the upper end of the side wall Have been proposed (see Patent Document 1 below).

特開平９−１７７３６０号公報JP-A-9-177360

特許文献１に記載の地下タンクでは、揚水圧及び温度応力により底版には曲げモーメントが作用し、底版の上面側には引張力が生じる。ここで、底版の側部に地下水から作用する側部水圧を考慮せずに設計が行われていたため、底版の上面側に生じる引張力に抗するために、底版を構成する鉄筋量を多くする設計とされていた。   In the underground tank described in Patent Document 1, a bending moment acts on the bottom plate due to pumping pressure and temperature stress, and a tensile force is generated on the upper surface side of the bottom plate. Here, since the design was performed without considering the side water pressure acting on the side of the bottom plate from the groundwater, in order to resist the tensile force generated on the upper surface side of the bottom plate, the amount of reinforcing bars constituting the bottom plate is increased. It was supposed to be a design.

また、底版の厚さ方向内に形成された凍結線（０℃となる境界線）の位置が上下方向に変位すると、これにともない側部水圧の大きさが変動してしまう。よって、側部水圧を制御して鉄筋量を設定することが困難であった。   Further, if the position of the freezing line (boundary line at 0 ° C.) formed in the thickness direction of the bottom plate is displaced in the vertical direction, the magnitude of the side water pressure will vary accordingly. Therefore, it is difficult to set the amount of reinforcing bars by controlling the side water pressure.

そこで、本発明は、上記事情に鑑みてなされたものであり、底版の鉄筋量を抑制することができる地下タンク及び地下タンクの止水方法を提供する。   Then, this invention is made | formed in view of the said situation, and provides the underground tank which can suppress the amount of reinforcing bars of a bottom slab, and the water stop method of an underground tank.

上記目的を達成するために、本発明は以下の手段を採用している。
すなわち、本発明に係る地下タンクは、地中に設けられた筒状の地中連続壁の内側に配置された地下タンクであって、底版と、該底版の縁部から上方に延びる側壁と、該側壁の上部を覆う本体屋根と、前記底版と前記地中連続壁との境界部に設けられた止水構造と、を備え、該止水構造は、前記底版の下面よりも上方且つ前記境界部における凍結線を上下方向にまたがる位置に、配置されていることを特徴とする。 In order to achieve the above object, the present invention employs the following means.
That is, the underground tank according to the present invention is an underground tank arranged inside a cylindrical underground continuous wall provided in the ground, and a bottom plate and a side wall extending upward from the edge of the bottom plate, A main body roof covering the upper part of the side wall, and a water stop structure provided at a boundary portion between the bottom plate and the underground continuous wall, the water stop structure being above the lower surface of the bottom plate and the boundary It is characterized by being arranged at a position across the freezing line in the part in the vertical direction.

このように構成された地下タンクでは、地下タンクの底版と地中連続壁との境界部における凍結線を上下方向にまたがる位置に、止水構造が設けられている。よって、地中連続壁側から底版側へ水の浸入を抑制することができる。
また、地下タンクでは、止水構造を底版の下面よりも上方に配置することにより、底版の下面から止水構造の下端までの上下方向の高さに対応する底版の側部には水圧（以下、「側部水圧」と称する。）を作用させることができ、この側部水圧により底版に軸圧縮力を生じさせることができる。ここで、底版を構成する鉄筋の鉄筋量は、側部水圧に基づいて設定される。よって、本発明の地下タンクでは、止水構造の下方に作用する側部水圧ひいてはこの側部水圧により生じる軸圧縮力を考慮することで、底版を構成する鉄筋の鉄筋量を抑制することができる。 In the underground tank configured as described above, a water stop structure is provided at a position across the freezing line at the boundary between the bottom plate of the underground tank and the underground continuous wall. Therefore, it is possible to suppress the intrusion of water from the underground continuous wall side to the bottom plate side.
In the underground tank, the water stop structure is disposed above the bottom surface of the bottom slab, so that the side of the bottom slab corresponding to the vertical height from the bottom surface of the bottom slab to the bottom end of the water stop structure (hereinafter referred to as water pressure) , Referred to as “side water pressure”), and this side water pressure can generate an axial compression force on the bottom plate. Here, the amount of reinforcing bars constituting the bottom plate is set based on the side water pressure. Therefore, in the underground tank of the present invention, the amount of reinforcing bars of the reinforcing bars constituting the bottom slab can be suppressed by considering the side water pressure acting below the water stop structure and the axial compression force generated by this side water pressure. .

また、本発明に係る地下タンクにおいて、前記止水構造は、前記地中連続壁の内側に沿って配置された第一止水部と、該第一止水部の内側に沿って配置された板状のプレート部と、該プレート部を前記地中連続壁側に押圧する押圧部と、を有することが好ましい。
また、本発明に係る地下タンクの止水方法は、底版と、該底版の縁部から上方に延びる側壁と、該側壁の上部を覆う本体屋根と、を備え、地中に設けられた筒状の地中連続壁の内側に配置された地下タンクの止水方法であって、前記地中連続壁の内側に沿って第一止水部を配置し、該第一止水部の内側に沿って板状のプレート部を配置し、該プレート部を前記地中連続壁側に押圧部で押圧することを特徴とする。 Moreover, in the underground tank according to the present invention, the water stop structure is arranged along the first water stop portion arranged along the inside of the underground continuous wall and the inside of the first water stop portion. It is preferable to have a plate-shaped plate portion and a pressing portion that presses the plate portion toward the underground continuous wall.
Further, the underground tank water stopping method according to the present invention includes a bottom plate, a side wall extending upward from an edge portion of the bottom plate, and a main body roof covering the upper portion of the side wall, and a cylindrical shape provided in the ground. A water stop method for an underground tank arranged inside the underground continuous wall, wherein a first water stop portion is arranged along the inside of the underground continuous wall, and along the inside of the first water stop portion. A plate-like plate portion is arranged, and the plate portion is pressed against the underground continuous wall side by a pressing portion.

このように構成された地下タンク及び地下タンクの止水方法では、押圧部がプレート部を第一止水部側に押圧することで、地中連続壁と第一止水部等との間に生じる隙間を抑えることができる。よって、例えば、地中連続壁と地下タンクとの境界部に浸入しようとする水があったとしても、プレート部の第一止水部側を通る水の第一止水部によりも地下タンク側への浸入が、抑制される。   In the underground tank and the water stopping method for the underground tank configured as described above, the pressing portion presses the plate portion toward the first water stopping portion, so that the space between the underground continuous wall and the first water stopping portion is between. The generated gap can be suppressed. Therefore, for example, even if there is water trying to enter the boundary between the underground continuous wall and the underground tank, the underground tank side is also closer to the first water stopping part of the water passing through the first water stopping part side of the plate part. Intrusion into is suppressed.

また、本発明に係る地下タンクにおいて、前記止水構造は、前記プレート部の内側に沿って配置された第二止水部をさらに有していてもよい。   Moreover, the underground tank which concerns on this invention WHEREIN: The said water stop structure may further have the 2nd water stop part arrange | positioned along the inner side of the said plate part.

このように構成された地下タンクでは、例えば地中連続壁と地下タンクとの境界部に浸入しようとする水があったとしても、プレート部の第二止水部側を通る水の第二止水部よりも地下タンク側への浸入が、抑制される。   In the underground tank configured in this way, for example, even if there is water entering the boundary between the underground continuous wall and the underground tank, the second stop of the water passing through the second water stop side of the plate portion. Intrusion to the underground tank side from the water part is suppressed.

本発明に係る地下タンク及び地下タンクの止水方法によれば、地下タンクの鉄筋量を抑制することができる。   According to the underground tank and the underground water stopping method according to the present invention, the amount of reinforcing bars in the underground tank can be suppressed.

本発明の一実施形態に係る地下タンクを示す図である。It is a figure which shows the underground tank which concerns on one Embodiment of this invention. 本発明の一実施形態に係る地下タンクの止水構造を示す立断面図である。It is an elevation sectional view showing the still water structure of an underground tank concerning one embodiment of the present invention. 本発明の一実施形態に係る地下タンクの止水構造の底版を拡大し、底版の側部に作用する側部水圧を示した図である。It is the figure which expanded the bottom plate of the still water structure of the underground tank which concerns on one Embodiment of this invention, and showed the side part water pressure which acts on the side part of a bottom plate.

本発明の一実施形態に係る地下タンクについて説明する。
図１は、本発明の一実施形態に係る地下タンクを示す図である。
図１に示すように、本実施形態の地下タンク１は、地中Ｇに筒状に配置された地中連続壁２の内部に配置されている。地下タンク１は、平面視略円形状の底版Ａと、底版Ａの側部（縁部）Ａ１から上方に略円筒状に延びる側壁３と、側壁３の上端部３ａに支持されたドーム状の本体屋根６と、を備えている。これら底版Ａ及び側壁３は、鉄筋コンクリートで構成されている。底版Ａには、地盤凍結防止用の底部ヒータ８が埋設されている。
この地下タンク１は、例えば液化天然ガス等の低温液体の貯蔵に使用されるものである。 An underground tank according to an embodiment of the present invention will be described.
FIG. 1 is a diagram illustrating an underground tank according to an embodiment of the present invention.
As shown in FIG. 1, the underground tank 1 of this embodiment is arrange | positioned inside the underground continuous wall 2 arrange | positioned in the underground G at the cylinder shape. The underground tank 1 includes a bottom plate A having a substantially circular shape in plan view, a side wall 3 extending upward in a substantially cylindrical shape from a side (edge) A1 of the bottom plate A, and a dome-like shape supported by an upper end 3a of the side wall 3. A main body roof 6. The bottom plate A and the side wall 3 are made of reinforced concrete. A bottom heater 8 for preventing ground freezing is embedded in the bottom plate A.
The underground tank 1 is used for storing a low-temperature liquid such as liquefied natural gas.

次に、底版Ａと地中連続壁２との境界部Ｋに設けられた止水構造１０について説明する。   Next, the water stop structure 10 provided at the boundary portion K between the bottom plate A and the underground continuous wall 2 will be described.

図２は、地下タンク１の止水構造１０を示す立断面図である。
図２に示すように、止水構造１０は、第一止水部１１と、間詰め部１３と、プレート部１５と、第二止水部１７と、押圧部２０と、を備えている。 FIG. 2 is an elevational sectional view showing the water stop structure 10 of the underground tank 1.
As shown in FIG. 2, the water stop structure 10 includes a first water stop portion 11, a padding portion 13, a plate portion 15, a second water stop portion 17, and a pressing portion 20.

第一止水部１１は、地中連続壁２の内側に沿って配置されている。本実施形態の第一止水部１１は、地中連続壁２の内面２Ｂに、上下方向１５０ｍｍにわたって、厚み２０ｍｍで設けられたエポキシ樹脂である。   The first water stop portion 11 is disposed along the inside of the underground continuous wall 2. The 1st water stop part 11 of this embodiment is the epoxy resin provided in the inner surface 2B of the underground continuous wall 2 by thickness 20mm over 150 mm in the up-down direction.

間詰め部１３は、第一止水部１１の上方に配置されている。間詰め部１３の厚さ１３Ｚは、第一止水部１１の厚さ１１Ｚと略同一である。本実施形態の間詰め部１３は、地中連続壁２の内面２Ｂに、上下方向１８０ｍｍ、厚み２０ｍｍで設けられた低密度ポリエチレンを主原料とする押出高発泡ポリエチレン樹脂である。この間詰め部１３により、施工時に、第一止水部１１の上方に滞水することが抑制される。   The padding portion 13 is disposed above the first water stop portion 11. The thickness 13Z of the padding portion 13 is substantially the same as the thickness 11Z of the first water stop portion 11. The filling portion 13 of the present embodiment is an extruded high-foaming polyethylene resin mainly made of low-density polyethylene provided on the inner surface 2B of the underground continuous wall 2 in a vertical direction of 180 mm and a thickness of 20 mm. The padding portion 13 prevents water from stagnating above the first water stop portion 11 during construction.

プレート部１５は、板状に形成され、第一止水部１１から間詰め部１３にわたって上下方向に、これら第一止水部１１の内面１１Ｂ及び間詰め部１３の内面１３Ｂに沿って配置されている。本実施形態のプレート部１５は、厚さ４．５ｍｍ、上下方向の長さ３５０ｍｍの平鋼である。   The plate portion 15 is formed in a plate shape, and is arranged in the vertical direction from the first water stop portion 11 to the padding portion 13 along the inner surface 11B of the first water stop portion 11 and the inner surface 13B of the padding portion 13. ing. The plate part 15 of this embodiment is a flat steel having a thickness of 4.5 mm and a length of 350 mm in the vertical direction.

第二止水部１７は、プレート部１５の内面１５Ｂに沿って配置されている。また、第二止水部１７は、間詰め部１３が配置されている上下方向の範囲内に配置されている。本実施形態の第二止水部１７は、プレート部１５の内面１５Ｂに設けられた非加硫ブチルゴム系のシーリング材である。   The second water stop portion 17 is disposed along the inner surface 15B of the plate portion 15. Moreover, the 2nd water stop part 17 is arrange | positioned in the range of the up-down direction in which the padding part 13 is arrange | positioned. The second water stop portion 17 of the present embodiment is a non-vulcanized butyl rubber sealing material provided on the inner surface 15B of the plate portion 15.

押圧部２０は、プレート部１５の内面１５Ｂに沿って配置された押さえ部２１と、押さえ部２１に挿通され地中連続壁２に螺合されたボルト２２と、を有している。   The pressing portion 20 includes a pressing portion 21 disposed along the inner surface 15 </ b> B of the plate portion 15, and a bolt 22 inserted through the pressing portion 21 and screwed into the underground continuous wall 2.

押さえ部２１は、プレート部１５の内面１５Ｂに沿って配置された取付部２１Ｔと、取付部２１Ｔの上端から略直角に屈曲して底版Ａ側に延びる延出部２１Ｕと、を有している。本実施形態の押さえ部２１は、取付部２１Ｔと延出部２１Ｕとが一体に形成された山形鋼である。   The holding part 21 has an attachment part 21T arranged along the inner surface 15B of the plate part 15, and an extension part 21U that bends at a substantially right angle from the upper end of the attachment part 21T and extends to the bottom plate A side. . The holding part 21 of the present embodiment is an angle steel in which an attachment part 21T and an extension part 21U are integrally formed.

ボルト２２は、押さえ部２１の取付部２１Ｔ、プレート部１５及び第一止水部１１に挿通され、地中連続壁２に螺合されている。ボルト２２は、底版Ａの周方向に離間して複数螺合されている。本実施形態のボルト２２は、ケミカルアンカーである。   The bolt 22 is inserted through the attachment portion 21 </ b> T of the pressing portion 21, the plate portion 15, and the first water stop portion 11, and is screwed into the underground continuous wall 2. A plurality of bolts 22 are screwed together while being spaced apart from each other in the circumferential direction of the bottom plate A. The bolt 22 of this embodiment is a chemical anchor.

プレート部１５の上部には、スタッドボルト２５が螺合されている。スタッドボルト２５の軸部２５Ｊ及び頭部２５Ｋは、プレート部１５の内面１５Ｂから底版Ａ側に突出している。本実施形態では、スタッドボルト２５は、プレート部１５に設けられた第二止水部１７よりも上方で螺合されている。   A stud bolt 25 is screwed onto the upper portion of the plate portion 15. The shaft portion 25J and the head portion 25K of the stud bolt 25 protrude from the inner surface 15B of the plate portion 15 to the bottom plate A side. In the present embodiment, the stud bolt 25 is screwed above the second water stop portion 17 provided on the plate portion 15.

押さえ部２１の取付部２１Ｔの内面２１ＴＢ側及びプレート部１５における押さえ部２１よりも下方の内面１５Ｂ側には、はく離剤Ｈが塗布されている。   A release agent H is applied to the inner surface 21TB side of the mounting portion 21T of the pressing portion 21 and the inner surface 15B side of the plate portion 15 below the pressing portion 21.

このように、スタッドボルト２５が底版Ａを構成するコンクリートに定着するとともに、止水構造１０は底版Ａと一体化されている。   Thus, the stud bolt 25 is fixed to the concrete constituting the bottom plate A, and the water stop structure 10 is integrated with the bottom plate A.

図３は、地下タンク１の底版Ａを拡大し、底版Ａの側部Ａ１に作用する側部水圧Ｐ２を示した図である。なお、本図において、止水構造１０の構成を省略して示している。
図３に示すように、止水構造１０は、底版Ａの下面Ａ２よりも上方に配置されている。また、止水構造１０は、底版Ａと地中連続壁２との境界部Ｋにおいて、境界部Ｋにおける凍結線（０℃となる境界線）Ｓ１を上下方向にまたがる位置に配置されている。 FIG. 3 is an enlarged view of the bottom plate A of the underground tank 1 and shows the side water pressure P2 acting on the side portion A1 of the bottom plate A. In addition, in this figure, the structure of the water stop structure 10 is abbreviate | omitted and shown.
As shown in FIG. 3, the water stop structure 10 is disposed above the lower surface A <b> 2 of the bottom plate A. Moreover, the water stop structure 10 is arrange | positioned in the position which straddles the freezing line (boundary line used as 0 degreeC) S1 in the boundary part K in the up-down direction in the boundary part K of the bottom plate A and the underground continuous wall 2. FIG.

また、図３から分かるように、底版Ａの下面Ａ２から止水構造１０の下端１０Ｚまでの上下方向の高さに対応する底版Ａの側部Ａ１には、側部水圧Ｐ２が作用している。   Further, as can be seen from FIG. 3, the side water pressure P2 acts on the side portion A1 of the bottom plate A corresponding to the height in the vertical direction from the lower surface A2 of the bottom plate A to the lower end 10Z of the water stop structure 10. .

ここで、底版Ａにおける凍結線Ｓ１よりも上方の領域は凍結領域Ｒ１とされ、底版Ａにおける凍結線Ｓ１よりも下方の領域は不凍結領域Ｒ２とされている。底版Ａの底部ヒータ８は、不凍結領域Ｒ２に配置されている。   Here, a region above the freezing line S1 in the bottom plate A is a freezing region R1, and a region below the freezing line S1 in the bottom plate A is a non-freezing region R2. The bottom heater 8 of the bottom plate A is disposed in the non-freezing region R2.

このように構成された地下タンク１では、底版Ａと地中連続壁２との境界部Ｋにおける凍結線Ｓ１を上下方向にまたがる位置に、止水構造１０が設けられている。また、押圧部２０がプレート部１５を第一止水部１１側に向かって押圧することで、地中連続壁２と第一止水部１１との間に生じる隙間を抑えることができる。よって、例えば、地中連続壁２と地下タンク１との境界部Ｋに浸入しようとする水があったとしても、プレート部１５の第一止水部１１側を通る水の第一止水部１１によりも地下タンク１側への浸入が、抑制される。   In the underground tank 1 configured as described above, the water stop structure 10 is provided at a position across the freezing line S1 in the boundary portion K between the bottom plate A and the underground continuous wall 2 in the vertical direction. Moreover, the clearance gap which arises between the underground continuous wall 2 and the 1st water stop part 11 can be suppressed because the press part 20 presses the plate part 15 toward the 1st water stop part 11 side. Therefore, for example, even if there is water to enter the boundary portion K between the underground continuous wall 2 and the underground tank 1, the first water stop portion of the water passing through the first water stop portion 11 side of the plate portion 15. 11 prevents entry into the underground tank 1 side.

また、地下タンク１では、止水構造１０を底版Ａの下面Ａ２よりも上方に配置することにより、底版Ａの下面Ａ２から止水構造１０の下端１０Ｚまでの上下方向の高さに対応する底版Ａの側部Ａ１には、側部水圧Ｐ２を作用させることができ、この側部水圧Ｐ２により底版Ａに軸圧縮力を生じさせることができる。ここで、底版Ａを構成する鉄筋（不図示）の鉄筋量は、側部水圧Ｐ２に基づいて設定される。よって、本発明の地下タンク１では、止水構造１０の下方に作用する側部水圧Ｐ２ひいてはこの側部水圧Ｐ２により生じる軸圧縮力を考慮することで、底版Ａを構成する鉄筋の鉄筋量を抑制することができる。   Moreover, in the underground tank 1, the bottom plate corresponding to the height in the vertical direction from the bottom surface A2 of the bottom plate A to the lower end 10Z of the water stop structure 10 by disposing the water stop structure 10 above the bottom surface A2 of the bottom plate A. A side water pressure P2 can be applied to the side A1 of A, and an axial compression force can be generated in the bottom plate A by the side water pressure P2. Here, the amount of reinforcing bars (not shown) constituting the bottom plate A is set based on the side water pressure P2. Therefore, in the underground tank 1 of the present invention, the amount of reinforcing bars of the reinforcing bars constituting the bottom slab A can be determined by considering the side water pressure P2 acting below the water stop structure 10 and the axial compression force generated by the side water pressure P2. Can be suppressed.

また、地中連続壁２と地下タンク１との境界部Ｋに浸入しようとする水があったとしても、プレート部１５の第二止水部１７側を通る水の第二止水部１７よりも地下タンク１側への浸入が、抑制される。   In addition, even if there is water to enter the boundary portion K between the underground continuous wall 2 and the underground tank 1, the second water stop portion 17 of the water passing through the second water stop portion 17 side of the plate portion 15. Intrusion to the underground tank 1 side is also suppressed.

また、底版Ａを構成するコンクリートの硬化収縮や液化天然ガス冷熱による収縮等により、底版Ａと地中連続壁２との間に相対変位が生じる。ここで、押さえ部２１の取付部２１Ｔの内面２１ＴＢ側及びプレート部１５における押さえ部２１よりも下方の内面１５Ｂ側には、はく離剤Ｈが塗布されている。よって、底版Ａと地中連続壁２との間に相対変位が生じる際には、押さえ部２１及びプレート部１５と底版Ａとの間の縁が切れることで、第一止水部１１とプレート部１５とが密着した状態が維持されやすい。これにより、プレート部１５の第一止水部１１側を通る水の第一止水部１１によりも地下タンク１側への浸入が、確実に抑制される。   Also, relative displacement occurs between the bottom plate A and the underground continuous wall 2 due to hardening shrinkage of concrete constituting the bottom plate A, shrinkage due to liquefied natural gas cold heat, and the like. Here, the release agent H is applied to the inner surface 21TB side of the attachment portion 21T of the pressing portion 21 and the inner surface 15B side of the plate portion 15 below the pressing portion 21. Therefore, when relative displacement occurs between the bottom plate A and the underground continuous wall 2, the edge between the holding portion 21 and the plate portion 15 and the bottom plate A is cut, so that the first water stop portion 11 and the plate The state where the part 15 is in close contact is easily maintained. Thereby, the penetration to the underground tank 1 side is also reliably suppressed by the first water stop portion 11 of the water passing through the first water stop portion 11 side of the plate portion 15.

また、プレート部１５に設けられたスタッドボルト２５は、底版Ａを構成するコンクリートに定着されている。よって、底版Ａと地中連続壁２との間に相対変位が生じる際には、底版Ａはスタッドボルト２５の螺合されたプレート部１５と一体となって相対変位に追従することができる。これにより、プレート部１５と底版Ａとの間に生じる隙間を抑えることができるため、プレート部１５と底版Ａとの間への水の浸入が、確実に抑制される。   The stud bolt 25 provided on the plate portion 15 is fixed to the concrete constituting the bottom plate A. Therefore, when a relative displacement occurs between the bottom plate A and the underground continuous wall 2, the bottom plate A can follow the relative displacement integrally with the plate portion 15 to which the stud bolt 25 is screwed. Thereby, since the clearance gap produced between the plate part 15 and the baseplate A can be suppressed, the penetration | invasion of the water between the plate part 15 and the baseplate A is suppressed reliably.

なお、上述した実施の形態において示した各構成部材の諸形状や組み合わせ等は一例であって、本発明の主旨から逸脱しない範囲において設計要求等に基づき種々変更可能である。   The various shapes and combinations of the constituent members shown in the above-described embodiments are merely examples, and various modifications can be made based on design requirements and the like without departing from the gist of the present invention.

例えば、上記に示す実施形態においては、第一止水部１１の上方に、間詰め部１３が設けられているが、間詰め部１３を省略してもよい。   For example, in the embodiment described above, the padding portion 13 is provided above the first water stop portion 11, but the padding portion 13 may be omitted.

１…地下タンク
２…地中連続壁
３…側壁
６…本体屋根
１０…止水構造
１１…第一止水部
１５…プレート部
１７…第二止水部
２０…押圧部
Ａ…底版
Ｇ…地中
Ｋ…境界部
Ｓ１…凍結線 DESCRIPTION OF SYMBOLS 1 ... Underground tank 2 ... Underground continuous wall 3 ... Side wall 6 ... Main body roof 10 ... Water stop structure 11 ... First water stop part 15 ... Plate part 17 ... Second water stop part 20 ... Press part A ... Bottom plate G ... Ground Middle K ... Boundary part S1 ... Freezing line

Claims (4)

地中に設けられた筒状の地中連続壁の内側に配置された地下タンクであって、
底版と、
該底版の縁部から上方に延びる側壁と、
該側壁の上部を覆う本体屋根と、
前記底版と前記地中連続壁との境界部に設けられた止水構造と、を備え
該止水構造は、前記底版の下面よりも上方且つ前記境界部における凍結線を上下方向にまたがる位置に、配置されていることを特徴とする地下タンク。 An underground tank placed inside a cylindrical underground continuous wall provided in the ground,
The bottom plate,
A side wall extending upward from an edge of the bottom plate,
A main roof covering the top of the side wall;
A water stop structure provided at a boundary portion between the bottom plate and the underground continuous wall, wherein the water stop structure is located above the bottom surface of the bottom plate and at a position straddling the freezing line at the boundary portion in the vertical direction. An underground tank, characterized by being arranged. 前記止水構造は、
前記地中連続壁の内側に沿って配置された第一止水部と、
該第一止水部の内側に沿って配置された板状のプレート部と、
該プレート部を前記地中連続壁側に押圧する押圧部と、を有することを特徴とする請求項１に記載の地下タンク。 The water stop structure is
A first water stop disposed along the inside of the underground continuous wall;
A plate-like plate portion disposed along the inside of the first water stop portion;
The underground tank according to claim 1, further comprising: a pressing portion that presses the plate portion toward the underground continuous wall side. 前記止水構造は、
前記プレート部の内側に沿って配置された第二止水部をさらに有することを特徴とする請求項２に記載の地下タンク。 The water stop structure is
The underground tank according to claim 2, further comprising a second water stop portion disposed along the inside of the plate portion. 底版と、該底版の縁部から上方に延びる側壁と、該側壁の上部を覆う本体屋根と、を備え、地中に設けられた筒状の地中連続壁の内側に配置された地下タンクにおいて、前記底版の下面よりも上方且つ前記境界部における凍結線を上下方向にまたがる位置での地下タンクの止水方法であって、
前記地中連続壁の内側に沿って第一止水部を配置し、
該第一止水部の内側に沿って板状のプレート部を配置し、
該プレート部を前記地中連続壁側に押圧部で押圧することを特徴とする地下タンクの止水方法。 In an underground tank provided with a bottom plate, a side wall extending upward from an edge of the bottom plate, and a main body roof covering an upper portion of the side wall, and disposed inside a cylindrical underground continuous wall provided in the ground A method for stopping the underground tank at a position above the bottom surface of the bottom plate and across the freezing line in the boundary portion in the vertical direction,
Arranging the first water stop along the inside of the underground continuous wall;
A plate-like plate part is arranged along the inside of the first water stop part,
The underground tank water-stopping method, wherein the plate portion is pressed against the underground continuous wall side by a pressing portion.
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Publication number Priority date Publication date Assignee Title
CN114775641A (en) * 2022-05-30 2022-07-22 南京旭浦建材科技有限公司 Prefabricated ribbed cavity wallboard

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Publication number Priority date Publication date Assignee Title
JPH09250163A (en) * 1996-03-14 1997-09-22 Hayakawa Rubber Co Ltd Joint construction of concrete structure
WO2006054810A1 (en) * 2004-11-17 2006-05-26 Re-New System Co.,Ltd Method of water-proofed injection for concrete construction with injection pipe using a melting liguified gum mixture of wastetire to water-proof agent
JP2007321398A (en) * 2006-05-31 2007-12-13 Jsp Corp Water cutoff structure of concrete-jointed part, and water cutoff member
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JP2011032633A (en) * 2009-07-29 2011-02-17 Shimizu Corp Base structure of underground tank for storing low-temperature liquid

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Publication number Priority date Publication date Assignee Title
CN114775641A (en) * 2022-05-30 2022-07-22 南京旭浦建材科技有限公司 Prefabricated ribbed cavity wallboard
CN114775641B (en) * 2022-05-30 2023-08-29 南京旭浦建材科技有限公司 Prefabricated multi-ribbed cavity wallboard

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