JP5000771B2 - Septic tank installation structure - Google Patents

Septic tank installation structure Download PDF

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JP5000771B2
JP5000771B2 JP2011017676A JP2011017676A JP5000771B2 JP 5000771 B2 JP5000771 B2 JP 5000771B2 JP 2011017676 A JP2011017676 A JP 2011017676A JP 2011017676 A JP2011017676 A JP 2011017676A JP 5000771 B2 JP5000771 B2 JP 5000771B2
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column
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concrete slab
precast concrete
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JP2011136336A (en
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利勝 石川
孝 今泉
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株式会社カンケン
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本発明は埋設浄化槽をプレキャスト下部コンクリートスラブ上に載置し、該スラブから立てた支柱によって地表面に現場打設された上部コンクリートスラブを支持するようにした浄化槽の設置構造、殊に浄化槽の上下スラブ間支柱構造に関する。   In the present invention, an embedded septic tank is placed on a precast lower concrete slab, and an upper concrete slab placed on the ground surface is supported by struts erected from the slab. It relates to the strut structure between slabs.

地中に埋設された家庭用雑廃水処理用の浄化槽の上部を車庫、駐車場に使用する場合は、埋設浄化槽を載置する下部コンクリートスラブから複数本の支柱を立て地表面に現場打設された上部コンクリートスラブを支持し、上部コンクリートスラブ上面に加わる車輌の荷重を上下コンクリートスラブとコンクリート支柱とから成る耐力構造体で荷受けすることが義務付けられている。   When the upper part of the septic tank for household wastewater treatment buried in the ground is used for a garage or a parking lot, a plurality of props are set up on the ground surface from the lower concrete slab on which the buried septic tank is placed. It is obliged to support the upper concrete slab and receive the load of the vehicle applied to the upper surface of the upper concrete slab with a load-bearing structure composed of upper and lower concrete slabs and concrete columns.

特許文献1においては上記下部コンクリートスラブと上部コンクリートスラブと支柱とから成る耐力構造体を下記の工程1乃至6によって施工している。   In Patent Document 1, a load-bearing structure composed of the lower concrete slab, the upper concrete slab, and the support is constructed by the following steps 1 to 6.

<工程1>
地面に掘削した浄化槽設置穴の内底面に栗石を敷き固めし、その上面に均しコンクリートを打ち、該均しコンクリートの上面に複数枚のプレキャストコンクリートパネルから成る下部コンクリートスラブを形成する。
<工程2>
上記下部コンクリートスラブの各隅部から立ち上げておいた継ぎ鉄筋に複数本の縦筋を組筋すると共に、該縦筋の周りにスパイラル鉄筋を配筋する。
<工程3>
上記縦筋とスパイラル鉄筋の外周面にボイド管と呼ばれる紙製の型枠を外挿し、該ボイド管の上端開口部から管内にコンクリートを現場打設(充填)して上記縦筋とスパイラル鉄筋が埋設されたコンクリート支柱を成形し、通常はボイド管を埋め殺しにする。
<工程4>
上記支柱間を通して下部コンクリートスラブ上に浄化槽を吊り下ろし載置する。
<工程5>
上記浄化槽設置穴内に掘削土を埋め戻した後、上記コンクリート支柱の上端から突出する上記縦筋上端の継ぎ鉄筋に上部コンクリートスラブに埋設する鉄筋を組筋する。
<工程6>
上記浄化槽上の地表面(埋め戻し土の上面)に露出するコンクリートを現場打設し上記鉄筋を埋設せる上部コンクリートスラブを形成する。
<Step 1>
Kuriishi is spread on the inner bottom surface of the septic tank installation hole excavated on the ground, leveled concrete is cast on the upper surface, and a lower concrete slab composed of a plurality of precast concrete panels is formed on the upper surface of the leveled concrete.
<Process 2>
A plurality of vertical bars are braided on the joint reinforcing bars raised from the respective corners of the lower concrete slab, and spiral reinforcing bars are arranged around the vertical bars.
<Step 3>
A paper formwork called a void tube is extrapolated to the outer circumferential surface of the vertical and spiral reinforcing bars, and concrete is poured into the pipe from the upper end opening of the void pipe to fill the longitudinal bars and spiral reinforcing bars. Form the buried concrete struts and usually fill the void tube.
<Step 4>
The septic tank is suspended and placed on the lower concrete slab through the struts.
<Step 5>
After the excavated soil is backfilled in the septic tank installation hole, a reinforcing bar to be embedded in the upper concrete slab is braided on the joint reinforcing bar at the upper end of the vertical bar protruding from the upper end of the concrete support.
<Step 6>
The concrete exposed on the ground surface (the upper surface of the backfill soil) on the septic tank is cast on-site to form an upper concrete slab that embeds the rebar.

特開2002−61278号公報JP 2002-61278 A

上記特許文献1に代表される浄化槽設置構造、上下スラブ間支柱構造においては上記工程2,3,4に示すように、上記下部コンクリートスラブの各隅部から立ち上げておいた継ぎ鉄筋に縦筋を組筋する作業とスパイラル鉄筋を配筋する作業、上記縦筋とスパイラル鉄筋の外周面にボイド管を外挿して上記ボイド管の上端開口部から管内にコンクリートを現場打設(充填)する作業、該打設によって成形されたコンクリート支柱を硬化せしめる養生期間を経た後、上部コンクリートスラブを現場打設する作業等、上記工程2,3,4に示す煩雑な作業と、工期と工費の増大を招く問題点を有している。   In the septic tank installation structure typified by the above-mentioned Patent Document 1 and the strut structure between the upper and lower slabs, as shown in the above-mentioned steps 2, 3, and 4, the longitudinal reinforcing bars are connected to the reinforcing bars raised from the respective corners of the lower concrete slab. The work of placing the bar and the work of arranging the spiral reinforcing bar, The extrapolation of the void pipe to the outer peripheral surface of the vertical and spiral reinforcing bars, and the work of placing (filling) the concrete in the pipe from the upper end opening of the void pipe After the curing period to harden the concrete struts formed by the placing, the complicated work shown in the above steps 2, 3 and 4, such as the work of placing the upper concrete slab in the field, and the construction period and the construction cost are increased. It has an inviting problem.

又支柱を成形硬化した後に上部コンクリートスラブを現場打設形成する工事となるので、コンクリート支柱と上部コンクリートスラブとの剛構造化が確保し難く、加えてボイド管内の縦筋とスパイラル鉄筋がコンクリート流入を妨げ支柱内に巣を生成し易く、堅牢で健全なる上下スラブ間支柱構造が得難い問題点を有している。   In addition, since the upper concrete slab is cast and formed after the columns are molded and hardened, it is difficult to secure a rigid structure between the concrete columns and the upper concrete slab, and in addition, the vertical bars and spiral bars in the void pipe flow into the concrete. However, it is difficult to obtain a strut structure between the upper and lower slabs that is easy to generate a nest in the strut and is robust and sound.

特に支柱はボイド管内乃至地中内に隠蔽されてしまうので、しばしば支柱の工事瑕疵が見落とされがちであり、その改善が望まれている。   In particular, since the struts are concealed in the void pipe or in the ground, the construction struts of the struts are often overlooked, and improvements are desired.

本発明は、地中埋設浄化槽の下部コンクリートスラブと現場打ちして形成された上部コンクリートスラブ間に支柱を立設し、上部コンクリートスラブに加えられた垂直荷重(車輌荷重等)を支柱を介し下部コンクリートスラブで荷受けするようにした浄化槽設置構造に係る。   In the present invention, a column is erected between the lower concrete slab of the underground septic tank and the upper concrete slab formed by in-situ casting, and the vertical load (vehicle load, etc.) applied to the upper concrete slab is lowered through the column. It relates to a septic tank installation structure designed to receive concrete slabs.

上記浄化槽設置構造において上記コンクリート支柱をプレキャストコンクリート支柱で形成すると共に、上記下部コンクリートスラブを複数枚の単位プレキャストコンクリートプレートで形成し、該各単位プレキャストコンクリートプレートを側面を突き合わせつつ平面に結合して上記下部コンクリートスラブを形成する。   In the septic tank installation structure, the concrete strut is formed of a precast concrete strut, and the lower concrete slab is formed of a plurality of unit precast concrete plates. Form a lower concrete slab.

更に上記単位プレキャストコンクリートプレートに支柱立て穴を設け、該支柱立て穴を上記単位プレキャストコンクリートプレートの上面から立ち上げた同プレートと一体コンクリート製の支柱立てボスで画成した上穴部と上記単位プレキャストコンクリートプレートの肉厚内に凹成した有底の下穴部で形成し、又は上記支柱立て穴を上記単位プレキャストコンクリートプレートの上面から立ち上げた同プレートと一体コンクリート製の支柱立てボスで画成した上記上穴部で形成し、上記プレキャストコンクリート支柱の下端を上記支柱立て穴に立て込み同上端で上記上部コンクリートスラブを支持する浄化槽設置構造である。   Further, the unit precast concrete plate is provided with a pillar standing hole, the pillar standing hole is formed from the upper surface of the unit precast concrete plate and the upper hole part defined by the integral concrete pillar standing boss and the unit precast. It is formed with a bottomed bottom hole that is recessed within the thickness of the concrete plate, or the column support hole is defined by the same plate raised from the upper surface of the unit precast concrete plate and a column support boss made of integral concrete. The septic tank installation structure is formed by the upper hole portion, and the lower end of the precast concrete strut is stood into the strut standing hole and the upper concrete slab is supported by the same upper end.

又上記支柱立て穴の傾斜面と支柱下端外側面との間に楔を打ち込み、該傾斜面と対向する支柱立て穴の垂直面に押し付ける構造にし、コンクリート支柱下端の固定と位置決めを図る構造にする。   Also, a wedge is driven between the inclined surface of the column support hole and the outer surface of the lower end of the column, and the structure is pressed against the vertical surface of the column support hole facing the inclined surface, so that the lower end of the concrete support column is fixed and positioned. .

本発明によれば、下部コンクリートスラブとコンクリート支柱の両者をプレキャスト化して、その利点である工期の短縮と作業の簡素化を享受しつつ、上記下部コンクリートスラブに設けた支柱立て孔の上穴部と下穴部、又は上穴部によってコンクリート支柱の立て込み深さを確保し、支柱の安定なる立設が可能である。   According to the present invention, both the lower concrete slab and the concrete support are precast, and the upper hole portion of the support hole provided in the lower concrete slab is enjoyed while shortening the construction period and simplifying the work, which are the advantages thereof. The upright depth of the concrete support is secured by the lower hole and the upper hole, and the support can be stably erected.

又プレキャストコンクリート支柱を下部コンクリートスラブの支柱立て穴内に立て込み、支柱立て穴の傾斜面と支柱下端外側面との間に楔を打ち込み、支柱立て穴の垂直面に押し付ける構造の採用により、コンクリート支柱の垂直立設とその立設位置を確保して垂直荷重に対し有効に機能せしめる目的が容易に達成できる。   In addition, the concrete column is constructed by adopting a structure in which the precast concrete column is set up in the column stand hole of the lower concrete slab, a wedge is driven between the inclined surface of the column stand hole and the outer surface at the lower end of the column and pressed against the vertical surface of the column stand hole. It is possible to easily achieve the purpose of securing the vertical standing position and the standing position so as to function effectively with respect to the vertical load.

Aはプレキャスト下部コンクリートスラブにプレキャストコンクリート支柱を立て、浄化槽を下部コンクリートスラブ上に載置した状態を示す断面図、Bは上部コンクリートスラブに埋設される鉄筋とプレキャストコンクリート支柱の嵩上げ用鉄筋の継ぎ鉄筋部とを組筋した状態を示す断面図、Cは上部コンクリートスラブを現場打設して形成すると同時に、上記嵩上げコンクリートを現場打設して両者を一時に打設成形した状態を、嵩上げコンクリートと上部コンクリートスラブを断面して示す断面図。尚、図1B,図1Cにおいては、支柱は断面せずに嵩上げコンクリートと上部コンクリートスラブを断面して示した。A is a cross-sectional view showing a state in which a precast concrete column is set up on a precast lower concrete slab and a septic tank is placed on the lower concrete slab. Sectional view showing the state where the part is braided, C is formed by placing the upper concrete slab on-site, and at the same time, the state where the above-mentioned raised concrete is cast on-site and both are cast at once, Sectional drawing which cross-sections and shows an upper concrete slab. In FIG. 1B and FIG. 1C, the upright concrete and the upper concrete slab are shown in cross section without the cross section of the support column. Aは図1Bにおける上記プレキャストコンクリート支柱の嵩上げ用鉄筋の継ぎ鉄筋部と上部コンクリートスラブに埋設される鉄筋の組筋状態を拡大して示す断面図、Bは図1Cにおける嵩上げコンクリートと上部コンクリートスラブを一時に現場打設した状態を拡大して示す断面図。1A is a cross-sectional view showing an enlarged state of a reinforcing bar joint of a reinforcing bar for raising the precast concrete strut in FIG. 1B and a reinforcing bar embedded in the upper concrete slab, and FIG. 1B shows the raised concrete and the upper concrete slab in FIG. 1C. Sectional drawing which expands and shows the state laid at the site at once. 支柱立てボスを形成したプレキャスト下部コンクリートスラブの平面図。The top view of the precast lower concrete slab which formed the support stand boss. 上記支柱立てボスにプレキャストコンクリート支柱を立て込んだ状態を示すプレキャスト下部コンクリートスラブの断面図。Sectional drawing of the precast lower concrete slab which shows the state which put the precast concrete support | pillar in the said support | pillar stand boss | hub. プレキャストコンクリート支柱の一例を示す縦断面図。The longitudinal cross-sectional view which shows an example of a precast concrete support | pillar. 同支柱の平面図。The top view of the support | pillar. 同支柱の他例を示す縦断面図。The longitudinal cross-sectional view which shows the other examples of the support | pillar. 下部コンクリートスラブに一体にコンクリート成形した支柱立てボスの平面図。The top view of the support | pillar stand boss | mold formed integrally with the lower concrete slab. 上記支柱立てボスを一側面より観た断面図。Sectional drawing which looked at the said support | pillar stand boss from one side. 上記支柱立てボスを上記一側面に隣接する側面より観た断面図。Sectional drawing which looked at the said support | pillar standing boss from the side surface adjacent to the said one side surface. 支柱立て穴にプレキャストコンクリート支柱を立て込み楔を打ち込んだ状態を示す断面図。Sectional drawing which shows the state which stood the precast concrete support | pillar in the support | pillar standing hole, and struck the wedge.

以下本発明を実施するための最良の形態を図1乃至図11に基づき説明する。   The best mode for carrying out the present invention will be described below with reference to FIGS.

図1乃至図11において、1は地中に埋設された浄化槽4を地中埋設状態において載置するプレキャスト下部コンクリートスラブ、2は浄化槽4上の地表面に露出して現場打設した車輌等の垂直荷重が加えられる上部コンクリートスラブであり、該上部コンクリートスラブ2を下部コンクリートスラブ1から立設した複数本のコンクリート支柱3で支持する構成を有する。   1 to 11, 1 is a precast lower concrete slab for placing a septic tank 4 buried in the ground in a state of being buried underground, 2 is a vehicle or the like that is exposed on the ground surface above the septic tank 4 and placed on-site. It is an upper concrete slab to which a vertical load is applied, and has a configuration in which the upper concrete slab 2 is supported by a plurality of concrete columns 3 erected from the lower concrete slab 1.

図1Aに示すように、上記浄化槽4は地表面で開口するように掘削した浄化槽設置穴18内に収容し、該浄化槽設置穴18の内底面に設置したプレキャスト下部コンクリートスラブ1の上面に載置する。   As shown in FIG. 1A, the septic tank 4 is accommodated in a septic tank installation hole 18 excavated so as to open on the ground surface, and placed on the upper surface of the precast lower concrete slab 1 installed on the inner bottom surface of the septic tank installation hole 18. To do.

上記コンクリート支柱3は工場で事前に製造されたプレキャストコンクリート支柱であり、図5乃至図7に示す上記プレキャストコンクリート支柱3には上端から上方へ突出する嵩上げ用鉄筋5を具備せしめる。   The concrete strut 3 is a precast concrete strut manufactured in advance at a factory, and the precast concrete strut 3 shown in FIGS. 5 to 7 is provided with a raising reinforcing bar 5 protruding upward from the upper end.

上記プレキャストコンクリート支柱3内には複数本の縦筋16と、該縦筋16の周囲に巻き付けた横筋17とを埋設しておき、該縦筋16の上端をプレキャストコンクリート支柱3の上端から上方へ突設して嵩上げ用鉄筋5を形成する。   A plurality of vertical bars 16 and horizontal bars 17 wound around the vertical bars 16 are embedded in the precast concrete column 3, and the upper ends of the vertical bars 16 are directed upward from the upper ends of the precast concrete columns 3. The raised reinforcing bars 5 are formed by protruding.

上記嵩上げ用鉄筋5は基部延在部で嵩上げコンクリート6に埋設される嵩上げ鉄筋部5aを形成し、上端延在部で上部コンクリートスラブ2に埋設する鉄筋7との継ぎ鉄筋部5bを形成する。   The raising reinforcing bar 5 forms a raised reinforcing bar part 5 a embedded in the raised concrete 6 at the base extension part, and forms a joint reinforcing bar part 5 b with the reinforcing bar 7 embedded in the upper concrete slab 2 at the upper end extension part.

図7に示すように、上記プレキャストコンクリート支柱3の上端には筒壁10で画成された据え込み穴11を設け、該据え込み穴11の内底面から嵩上げ用鉄筋5を立ち上げ、上記嵩上げコンクリート6の下端のコンクリートを該据え込み穴11内に充填しつつ、嵩上げ用鉄筋5の嵩上げ鉄筋部5aを嵩上げコンクリート6内に埋設し支柱3との一体化を強化することができる。   As shown in FIG. 7, an upset hole 11 defined by a cylindrical wall 10 is provided at the upper end of the precast concrete support column 3, and the raising rebar 5 is raised from the inner bottom surface of the upset hole 11. While filling the concrete at the lower end of the concrete 6 into the uphole 11, the raised reinforcing bar portion 5 a of the raising reinforcing bar 5 can be embedded in the raised concrete 6 to enhance the integration with the column 3.

図1Aに示すように、上記プレキャストコンクリート支柱3をプレキャスト下部コンクリートスラブ1の四隅乃至縁部に垂直に立設する。   As shown in FIG. 1A, the precast concrete struts 3 are erected vertically at the four corners or edges of the precast lower concrete slab 1.

次に図1Bに示すように、上記浄化槽設置穴18内に掘削土を充填し、所謂埋め戻しを行う。21は該埋め戻し土を示す。   Next, as shown in FIG. 1B, the septic tank installation hole 18 is filled with excavated soil, and so-called backfilling is performed. 21 indicates the backfill soil.

更に、図1Bと図2Aに示すように、上記嵩上げ用鉄筋5の上端で形成した継ぎ鉄筋部5bを上部コンクリートスラブ1の埋設鉄筋7と組筋する。   Further, as shown in FIGS. 1B and 2A, the joint reinforcing bar portion 5 b formed at the upper end of the raising reinforcing bar 5 is assembled with the embedded reinforcing bar 7 of the upper concrete slab 1.

継ぎ鉄筋部5bは先端部をL形に曲げて重ねしろを形成し、該重ねしろを鉄筋7の横筋に重ねるか、継ぎ鉄筋部5bの先端部を逆U形に曲げてフックを形成し、該フックを鉄筋7の横筋に掛け止めし、夫々組筋する方法を採る。この場合、線材を用いて組筋部を結束できることは勿論である。   The joint reinforcing bar portion 5b is bent at the tip portion into an L shape to form an overlap, and the overlap margin is overlapped with the horizontal bar of the reinforcing bar 7, or the tip portion of the joint reinforcing bar portion 5b is bent into an inverted U shape to form a hook, A method is used in which the hooks are hooked on the horizontal bars of the reinforcing bars 7 and the bars are respectively braided. In this case, it goes without saying that the braided portion can be bound using a wire rod.

次に、図1Cと図2Bに示すように、プレキャストコンクリート支柱3の上端に上記嵩上げ用鉄筋5基部の嵩上げ鉄筋部5aを埋設する嵩上げコンクリート6と上部コンクリートスラブ2とを現場打設して形成し、該嵩上げコンクリート6にて上記上部コンクリートスラブ2を嵩上げする。   Next, as shown in FIG. 1C and FIG. 2B, the raised concrete 6 and the upper concrete slab 2 in which the raised reinforcing bar 5a of the raised reinforcing bar 5 base is embedded at the upper end of the precast concrete support column 3 are formed by in-situ placement. The upper concrete slab 2 is raised with the raised concrete 6.

現在、上部コンクリートスラブ2の嵩上げ寸法は、過大にすると浄化槽4のマンホール19からの点検に支障を来す理由から30cmを上限とすることが義務付けられている。これに従い、上記嵩上げ用鉄筋5は30cmを上限とする嵩上げ鉄筋部5aと継ぎ鉄筋部5bとを加算した40〜60cm程度の長さにする。   Currently, the upper dimension of the upper concrete slab 2 is obliged to have an upper limit of 30 cm for the reason that it will hinder the inspection from the manhole 19 of the septic tank 4 if it is excessive. Accordingly, the raising reinforcing bar 5 has a length of about 40 to 60 cm obtained by adding the raising reinforcing bar part 5a and the joint reinforcing bar part 5b with the upper limit of 30 cm.

上記のように、継ぎ鉄筋部5bと鉄筋7との組筋後に上部コンクリートスラブ2と嵩上げコンクリート6を一時に現場打設し形成するので、上記組筋時には継ぎ鉄筋部5bが嵩上げコンクリート6の上方に突出することはないが、完成した構造においては継ぎ鉄筋部5bが嵩上げコンクリート6を貫いて上方へ突出し、上部コンクリートスラブ2に埋設の鉄筋7と組筋した構造となる。   As described above, since the upper concrete slab 2 and the raised concrete 6 are once cast in place after the joint between the reinforcing bar portion 5b and the reinforcing bar 7, the joint reinforcing bar portion 5b is located above the raised concrete 6 at the time of the above braiding. However, in the completed structure, the joint rebar part 5b penetrates the raised concrete 6 and protrudes upward, and is a structure in which the rebar 7 embedded in the upper concrete slab 2 is braided.

上記の通り、上記上部コンクリートスラブ2と嵩上げコンクリート6は一時に現場打設し一体構造にしたコンクリート構造にし、他方コンクリート支柱3と下部コンクリートスラブ1とをプレキャストコンクリート製とする。   As described above, the upper concrete slab 2 and the raised concrete 6 are cast on site at a time to form a concrete structure, and the concrete support 3 and the lower concrete slab 1 are made of precast concrete.

従ってコンクリート支柱3の下端は下部コンクリートスラブ1と鉄筋コンクリートで結合しない構造、即ち非結合構造にし、支柱3の位置決めと垂直立設のみを図る手段を講じる。   Accordingly, the lower end of the concrete support 3 is not connected to the lower concrete slab 1 by reinforced concrete, that is, a non-bonded structure, and means for positioning the support 3 and only standing vertically is provided.

上記上部コンクリートスラブ2を嵩上げコンクリート6で嵩上げするに際し、上記浄化槽4上面のマンホール19を既知の嵩上げ筒20を用いて嵩上げしておき、上記上部コンクリートスラブ2を上記マンホール19の蓋と略同一レベルに現場打設し形成する。   When raising the upper concrete slab 2 with the raised concrete 6, the manhole 19 on the upper surface of the septic tank 4 is raised using a known raising cylinder 20, and the upper concrete slab 2 is approximately at the same level as the lid of the manhole 19. Formed on site.

上記下部コンクリートスラブ1は図3,図4に示すように、複数枚の単位プレキャストコンクリートプレート1aを平面に結合して形成する。各単位プレキャストコンクリートプレート1aは側面を突き合わせつつ、該側面と略同一平面に設けたボルト締結板13を互いに突き合わせ、ボルト14によって締結することによって各単位プレキャストコンクリートプレート1aを一体化し一枚の下部コンクリートスラブ1を形成する。   As shown in FIGS. 3 and 4, the lower concrete slab 1 is formed by connecting a plurality of unit precast concrete plates 1a to a plane. Each unit precast concrete plate 1a abuts the side surface, but a bolt fastening plate 13 provided in substantially the same plane as the side surface is abutted with each other and fastened with a bolt 14, thereby uniting each unit precast concrete plate 1a into one piece of lower concrete. Slab 1 is formed.

上記下部コンクリートスラブ1には上面で開口する支柱立て穴8を設ける。該支柱立て穴8は上記下部コンクリートスラブ1の上面から立ち上げた同スラブと一体コンクリート製の支柱立てボス9で画成した上穴部8aと、上記下部コンクリートスラブ1の肉厚内に凹成した上穴部8aと同心の有底の下穴部8bで形成し、上記プレキャストコンクリート支柱3の下端を上記上穴部8aに立て込みつつ下穴部8bに立て込み、支柱3下端面を下穴部8bの内底面8eに定着する。   The lower concrete slab 1 is provided with a column standing hole 8 opened at the upper surface. The pillar standing hole 8 is recessed within the wall thickness of the lower concrete slab 1 and the upper hole part 8a defined by the same concrete slab raised from the upper surface of the lower concrete slab 1 and the pillar standing boss 9 made of integral concrete. It is formed with a bottomed bottom hole portion 8b concentric with the top hole portion 8a, and the lower end of the precast concrete support column 3 is raised into the lower hole portion 8b while the lower end of the precast concrete support column 3 is lowered into the upper hole portion 8a. Fixing to the inner bottom surface 8e of the hole 8b.

上記支柱立て穴8の少なくとも一内側面をプレキャストコンクリート支柱3下端に対し迎え角を以って傾斜面8cにし支柱下端の導入を案内する構成とすると共に、支柱立て穴8の該傾斜面8cの一つと対向する内側面を垂直面8dにし、上記傾斜面8cとプレキャストコンクリート支柱3下端の一外側面3aとの間に形成された間隙15に楔12を打ち込んでプレキャストコンクリート支柱3下端の上記一外側面3aと対向する外側面3bを上記垂直面8dに押し付け、コンクリート支柱3下端を固定し立設位置を確保する、同時に上記押し付けによって垂直立設状態を確保する。よって嵩上げコンクリート6と上部コンクリートスラブ2の現場打設作業に供し、上部コンクリートスラブ2に加わる車輌等の垂直荷重に対し有効に機能せしめる。   At least one inner side surface of the column support hole 8 is inclined to the inclined surface 8c with an angle of attack with respect to the lower end of the precast concrete support 3, and the introduction of the support lower end is guided. The inner surface facing one is a vertical surface 8d, and a wedge 12 is driven into a gap 15 formed between the inclined surface 8c and one outer surface 3a at the lower end of the precast concrete column 3, and the above-mentioned one at the lower end of the precast concrete column 3 is formed. The outer side surface 3b opposite to the outer side surface 3a is pressed against the vertical surface 8d, the lower end of the concrete support 3 is fixed and the standing position is secured, and at the same time, the vertical standing state is secured by the pressing. Therefore, the raised concrete 6 and the upper concrete slab 2 are used for the on-site placement work, and function effectively with respect to the vertical load of the vehicle or the like applied to the upper concrete slab 2.

上記支柱立て穴8は下穴部8bを形成せずに上穴部8aによって形成することができる。上記支柱立て穴8の内底面8e、即ち下穴部8bの内底面8eは支柱3の下端面と略同一大きさで同一形状にし、支柱3の下端の末端を支柱立て穴8の傾斜面8cの下端と同垂直面8dにて規制しずれ止めする。   The above-mentioned column standing hole 8 can be formed by the upper hole portion 8a without forming the lower hole portion 8b. The inner bottom surface 8e of the column support hole 8, that is, the inner bottom surface 8e of the lower hole portion 8b is substantially the same size and shape as the lower end surface of the support column 3, and the end of the lower end of the support column 3 is the inclined surface 8c of the support column standing hole 8. It is regulated and prevented from being displaced by the same vertical surface 8d as the lower end of the.

図8乃至図11に示すように、実施例として支柱3を断面方形にし、これに応じ上記支柱立て穴8を方形にし、従って支柱立てボス9を方形にし、該方形支柱立て穴8の一内側面、又は三内側面を傾斜面8cにし、即ち支柱立て穴8の少なくとも一内側面を傾斜面8cにする。   As shown in FIG. 8 to FIG. 11, as an embodiment, the column 3 is square in cross section, and the column stand hole 8 is squared accordingly, and thus the column stand boss 9 is square, and the inside of the square column stand hole 8 is inside. The side surface or the three inner side surfaces are inclined surfaces 8c, that is, at least one inner side surface of the column standing hole 8 is the inclined surface 8c.

又は支柱立て穴8とこれを画成する支柱立てボス9を円形又は楕円形にすると共に、支柱3を断面円形又は楕円形にし、該円形又は楕円形の支柱立て穴8の一内側面を傾斜面8cにし、他の内側面を垂直面8dにする。又は支柱立て穴8とこれを画成する支柱立てボス9を多角形にし、支柱3を断面多角形にして上記構造を実施できる。   Alternatively, the pillar standing hole 8 and the pillar standing boss 9 defining this are made circular or elliptical, and the pillar 3 is made circular or elliptical in cross section, and one inner surface of the circular or elliptical pillar standing hole 8 is inclined. The surface 8c is used, and the other inner surface is a vertical surface 8d. Alternatively, the above-described structure can be implemented by making the pillar standing hole 8 and the pillar standing boss 9 defining this into a polygon and making the pillar 3 a polygon in cross section.

1…下部コンクリートスラブ、1a…単位プレキャストコンクリートプレート、2…上部コンクリートスラブ、3…プレキャストコンクリート支柱、3a…同支柱下端一外側面、3b…同一外側面3aと対向する外側面、4…浄化槽、5…嵩上げ用鉄筋、5a…嵩上げ鉄筋部、5b…継ぎ鉄筋部、6…嵩上げコンクリート、7…埋設鉄筋、8…支柱立て穴、8a…上穴部、8b…下穴部、8c…傾斜面、8d…垂直面、8e…内底面、9…支柱立てボス、10…筒壁、11…据え込み穴、12…楔、13…ボルト締結穴、14…ボルト、15…間隙、16…縦筋、17…横筋、18…浄化槽設置穴、19…マンホール、20…マンホールの嵩上げ筒、21…埋め戻し土。   DESCRIPTION OF SYMBOLS 1 ... Lower concrete slab, 1a ... Unit precast concrete plate, 2 ... Upper concrete slab, 3 ... Precast concrete support | pillar, 3a ... Lower end one outer surface of the support | pillar, 3b ... Outer surface facing the same outer surface 3a, 4 ... Septic tank, DESCRIPTION OF SYMBOLS 5 ... Reinforcing bar, 5a ... Raised reinforcing bar part, 5b ... Joint reinforcing bar part, 6 ... Raised concrete, 7 ... Embedded reinforcing bar, 8 ... Post standing hole, 8a ... Upper hole part, 8b ... Lower hole part, 8c ... Inclined surface , 8d: vertical surface, 8e: inner bottom surface, 9: support stand boss, 10 ... cylindrical wall, 11 ... installation hole, 12 ... wedge, 13 ... bolt fastening hole, 14 ... bolt, 15 ... gap, 16 ... vertical bar , 17 ... Horizontal stripes, 18 ... Septic tank installation hole, 19 ... Manhole, 20 ... Manhole raising cylinder, 21 ... Backfill soil.

Claims (1)

地中に埋設された浄化槽を載置する下部コンクリートスラブと、浄化槽上の地表面に現場打設された上部コンクリートスラブとを備え、該上部コンクリートスラブを下部コンクリートスラブから立設した複数本のコンクリート支柱で支持する構成を有する浄化槽設置構造において、上記コンクリート支柱をプレキャストコンクリート支柱で形成すると共に、上記下部コンクリートスラブを複数枚の単位プレキャストコンクリートプレートで形成し、該各単位プレキャストコンクリートプレートを側面を突き合わせつつ平面に結合して上記下部コンクリートスラブを形成し、更に上記単位プレキャストコンクリートプレートに支柱立て穴を設け、該支柱立て穴を上記単位プレキャストコンクリートプレートの上面から立ち上げた同プレートと一体コンクリート製の支柱立てボスで画成した上穴部と上記単位プレキャストコンクリートプレートの肉厚内に凹成した有底の下穴部で形成し、又は上記支柱立て穴を上記単位プレキャストコンクリートプレートの上面から立ち上げた同プレートと一体コンクリート製の支柱立てボスで画成した上記上穴部で形成し、上記プレキャストコンクリート支柱の下端を上記支柱立て穴に立て込み同上端で上記上部コンクリートスラブを支持する構造を有し、上記支柱立て穴の少なくとも一内側面をプレキャストコンクリート支柱下端に対し迎え角を以って傾斜面にすると共に、支柱立て穴の該傾斜面と対向する内側面を垂直面にし、上記傾斜面とプレキャストコンクリート支柱下端の一外側面との間に形成された間隙に楔を打ち込んでプレキャストコンクリート支柱下端の上記一外側面と対向する外側面を上記垂直面に押し付けた構造を有することを特徴とする浄化槽設置構造。 A plurality of concretes comprising a lower concrete slab for placing a septic tank buried in the ground and an upper concrete slab placed on the ground surface on the septic tank, the upper concrete slab being erected from the lower concrete slab In the septic tank installation structure having a structure to be supported by a support column, the concrete support column is formed by a precast concrete support column, and the lower concrete slab is formed by a plurality of unit precast concrete plates. The lower concrete slab is formed by bonding to a flat surface, and a column stand hole is provided in the unit precast concrete plate, and the column stand hole is aligned with the plate raised from the upper surface of the unit precast concrete plate. It is formed by an upper hole portion defined by a concrete column stand boss and a bottomed bottom hole portion recessed within the thickness of the unit precast concrete plate, or the column stand hole is formed on the upper surface of the unit precast concrete plate. It is formed with the upper hole part defined by the same plate raised from the top and a column stand boss made of monolithic concrete, and the lower end of the precast concrete column is raised into the column column hole to support the upper concrete slab at the same upper end. structure have at at least one inner surface of the pillar stand hole while the inclined surface drives out attack against precast concrete pillar lower end, the inner surface facing the inclined surface of the column stand hole in a vertical plane, A wedge is driven into a gap formed between the inclined surface and one outer surface of the lower end of the precast concrete column, Septic installation structure of an outer surface opposed to the first outer surface of the cleat strut bottom, characterized in that have a pressing structure in the vertical plane.
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