JP4195890B2 - Stacking blocks - Google Patents

Stacking blocks Download PDF

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JP4195890B2
JP4195890B2 JP2005373290A JP2005373290A JP4195890B2 JP 4195890 B2 JP4195890 B2 JP 4195890B2 JP 2005373290 A JP2005373290 A JP 2005373290A JP 2005373290 A JP2005373290 A JP 2005373290A JP 4195890 B2 JP4195890 B2 JP 4195890B2
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plate
retaining
stacking
concrete
block
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JP2007170145A (en
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晴穂 坂本
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旭コンクリート工業株式会社
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本発明は、例えば宅地造成地の擁壁や河川の護岸等の壁体を構築し得る積みブロックに関するものである。   The present invention relates to a building block capable of constructing a wall body such as a retaining wall of a residential land development site or a river bank.
従来より、積みブロックを複数段積み上げて擁壁等の壁体を構築する態様として、積みブロックの背後に砂利等を堆積した空積み構造が一般的であったが、積上可能な高さに限度があるという不具合があった。そこで、積みブロックの背後にコンクリートを打設し、積みブロックとコンクリートとを一体化してなる練積み構造が普及している。このような練積み構造に適用される積みブロックとして、壁体の正面を形成する板状の正面壁部と、正面壁部の後面部から後方に向かって延出する一対の控え壁部とを備えたものが知られている(例えば特許文献1参照)。
特開2003−306922号公報(図1〜図3等)
Conventionally, as a mode of building a wall body such as a retaining wall by stacking a plurality of stacking blocks, an empty stacking structure in which gravel is accumulated behind the stacking block has been generally used. There was a bug that there was a limit. Therefore, a kneaded structure in which concrete is placed behind the stacking block and the stacking block and the concrete are integrated is widely used. As a stacking block applied to such a kneading structure, a plate-shaped front wall portion that forms the front surface of the wall body and a pair of retaining wall portions that extend rearward from the rear surface portion of the front wall portion. What is provided is known (for example, refer patent document 1).
JP-A-2003-306922 (FIGS. 1-3, etc.)
しかしながら、前記特許文献に示すような従来品は、一対の控え壁部がコンクリート内に埋め込まれる態様、すなわち正面壁部の長手方向に対して略直交する方向に延びる部位のみがコンクリート内に埋め込まれる態様であるため、背面土砂(以下「背土」と称す)の土圧によって、積みブロック自体の前方への位置ずれ又は抜け落ち等の不具合が生じる虞があり、コンクリート硬化後の壁体の安定性に劣るものである。また、積みブロックの背後にコンクリートを打設する際に、コンクリート打設用の型枠を枠組みする必要があるため、施工に手間が掛かり、コストも嵩むといった不具合もあった。なお、アンカーとして機能する鋼材等の線材を、その一端部を正面壁部に固定するとともに他端部を背土内に埋め込んで固定する態様も考えられるが、部品点数及び作業工程数の増加を招来し、やはり作業性に劣るという不具合が生じる。   However, in the conventional product as shown in the above-mentioned patent document, a pair of retaining wall portions are embedded in the concrete, that is, only a portion extending in a direction substantially orthogonal to the longitudinal direction of the front wall portion is embedded in the concrete. Because of this aspect, the earth pressure of the back soil (hereinafter referred to as “back soil”) may cause problems such as misalignment or dropout of the stacking block itself, and the stability of the wall after hardening the concrete It is inferior to. In addition, when placing concrete behind the stacking block, it is necessary to form a concrete formwork, so that there is a problem in that construction takes time and costs increase. In addition, although the aspect which fixes the wire rods, such as steel materials which function as an anchor, to the front wall part while fixing the other end part in back soil is also considered, the number of parts and the number of work processes are increased. Invited, the problem of poor workability occurs.
本発明は、このような課題に着目してなされたものであって、主たる目的は、コンクリート硬化後の壁体の安定性を向上し、且つ作業性に優れた積みブロックを提供することにある。   The present invention has been made paying attention to such problems, and a main object is to provide a stacking block that improves the stability of the wall body after hardening of the concrete and has excellent workability. .
すなわち、本発明の積みブロックは、複数段積み上げることにより擁壁等の壁体を構築し得るものであって、前記壁体の正面を形成する板状の正面壁部と、当該正面壁部と略同一高さ寸法を有し且つ正面壁部から後方に向かって延出する一対の控え壁部と、これら控え壁部の下端部位同士を連結する連結部とを具備してなり、前記正面壁部が前板部と後板部とを備えたものであり、前記前板部の上端部を前記後板部の上端部よりも上方に位置付け、前記後板部の下端部と前記控え壁部の下端部と前記連結部の下端部とを略一致させ、これら各下端部が接地することにより自立し得るようにし、前記控え壁部のうち前記連結部との連結部位における上端部又は下端部の何れか一方に係合突起を設け、他方に当該係合突起が係合可能な係合凹部を設けていることを特徴とする。 That is, the stacking block of the present invention can build a wall body such as a retaining wall by stacking a plurality of stages, and includes a plate-like front wall part that forms the front surface of the wall body, and the front wall part. a pair of buttress portions extending from and front wall portion have substantially the same height towards the rear, it comprises a connecting portion for connecting the lower end portions between these buttresses portion, the front wall The front plate portion and the rear plate portion, the upper end portion of the front plate portion is positioned above the upper end portion of the rear plate portion, the lower end portion of the rear plate portion and the retaining wall portion The lower end portion of the connecting portion and the lower end portion of the connecting portion are substantially coincided with each other so that each lower end portion can be grounded, and the upper end portion or the lower end portion of the retaining wall portion at the connecting portion with the connecting portion. An engaging protrusion is provided on one of the two, and an engaging recess in which the engaging protrusion can be engaged on the other Only wherein the are.
このようなものであれば、控え壁部に加えて連結部もコンクリート内に埋め込まれる態様、すなわち正面壁部の長手方向に対して略直交する方向に延びる部位(控え壁部)のみならず、正面壁部の長手方向に対して略平行に延びる部位(連結部)がコンクリート内に埋め込まれる態様であるため、背土の土圧によって積みブロック自体が前方へ位置ずれ又は抜け落ちるといった不具合が生じ難く、コンクリート硬化後の壁体の安定性を有効に向上させることができる。また、連結部が控え壁部の下端部位同士を連結するものであるため、連結部が控え壁部の上端部から下端部に亘る部位を連結する場合と比較してコンクリートの打設作業を容易且つスムーズに行うことができ、施工効率の向上に資する。さらに、連結部がコンクリートを打設する際にコンクリート用の型枠としても機能するため、別途にコンクリート打設用の型枠を枠組みする必要がなく、作業時間を短縮することができ、コストも低減することが可能である。   If this is the case, in addition to the retaining wall portion, the connecting portion is also embedded in the concrete, that is, not only the portion extending in the direction substantially perpendicular to the longitudinal direction of the front wall portion (the retaining wall portion), Since the portion (connecting portion) extending substantially parallel to the longitudinal direction of the front wall portion is embedded in the concrete, it is difficult to cause a problem that the stack block itself is displaced forward or falls off due to the earth pressure of the back soil. Moreover, the stability of the wall body after concrete hardening can be improved effectively. Moreover, since the connecting portion connects the lower end portions of the retaining wall portion, it is easier to place concrete compared to the case where the connecting portion connects the portions extending from the upper end portion to the lower end portion of the retaining wall portion. It can be performed smoothly and contributes to the improvement of construction efficiency. Furthermore, since the connecting portion also functions as a concrete formwork when placing concrete, it is not necessary to separately form a concrete formwork, reducing work time and cost. It is possible to reduce.
特に、前記一対の控え壁部が、それぞれ厚み方向に貫通する貫通孔を有するものであり、巾方向に複数並べた状態で符合する各貫通孔に共通の鋼材を挿入可能にしていれば、控え壁部がコンクリートの閉塞部となることを防止して、スムーズな打設作業を確保することができる。また、各貫通孔に共通の鋼材を挿入可能にしているため、巾方向に並設する積みブロックの一体性をも有効に向上させることができる。   In particular, the pair of retaining wall portions each have a through hole penetrating in the thickness direction, and if a common steel material can be inserted into each of the through holes that are aligned in the width direction, the retaining wall The wall portion can be prevented from becoming a closed portion of the concrete, and a smooth placing operation can be ensured. In addition, since a common steel material can be inserted into each through hole, the integrity of the stacked blocks arranged in parallel in the width direction can be effectively improved.
積みブロックの積み上げ作業を容易且つ的確に行えるようにするには、前記一対の控え壁部の上端部又は下端部の何れか一方に、係合突部を設け、他方に当該係合突部が係合可能な係合凹部を設ければよい。   In order to enable the stacking work of the stacking blocks to be performed easily and accurately, an engagement protrusion is provided on either the upper end or the lower end of the pair of retaining walls, and the engagement protrusion is provided on the other. What is necessary is just to provide the engagement recessed part which can be engaged.
さらに、積み姿勢で自立可能なものであれば、積み作業時に、積みブロックを例えば後方からサポートするサポート部材を別途に用意する必要がなく、作業をスムーズに進めることができる上、不要な部材(サポート部材)を現場に搬入・搬出する手間を省き、工期短縮化をも有効に図ることができる。   Furthermore, if it can be self-supported in the stacking posture, it is not necessary to prepare a separate support member for supporting the stacking block from the rear, for example, during the stacking operation, and the work can be smoothly performed and unnecessary members ( This saves time and effort to carry in and out the support member) and effectively shortens the work period.
好適な実施様態としては、前記正面壁部が、少なくとも前板部と後板部とを厚み方向に重合させ、前記前板部と前記後板部とを高さ方向又は巾方向の何れか一方或いは両方に沿って所定寸法ずらしたものが挙げられる。ここで、正面壁部の態様としては、前板部と後板部とを、1)高さ方向にのみ所定寸法ずらした態様、2)巾方向にのみ所定寸法ずらした態様、3)高さ方向及び巾方向に所定寸法ずらした態様が挙げられる。前記1)又は3)の態様であれば、積みブロックを複数段積み上げた状態において、下段側に配した正面壁部と上段側に配した正面壁部とが相互に凹凸係合し、前記2)又は3)の態様であれば、積みブロックを巾方向に並設した状態において、隣接する正面壁部同士が相互に凹凸係合する。このように正面壁部を構成する2枚の板部材を相互にずらした状態で重合することにより、いわゆる正面壁部がオスメス継ぎ手として機能し、隣接する積みブロック同士の密着度を高め、コンクリート打設時にコンクリートが隣接する積みブロック間から流れ出すことを有効に防止することができるとともに、隣接する積みブロックの組付強度をも有効に向上させて、積みブロックに作用する背土からの圧力やコンクリート打設時の圧力に十分に耐え得ることが可能である。   As a preferred embodiment, the front wall portion superposes at least the front plate portion and the rear plate portion in the thickness direction, and the front plate portion and the rear plate portion are either in the height direction or the width direction. Or what shifted predetermined dimension along both is mentioned. Here, as an aspect of the front wall portion, the front plate portion and the rear plate portion are 1) a mode in which the predetermined dimension is shifted only in the height direction, 2) a mode in which the predetermined dimension is shifted only in the width direction, and 3) the height. A mode in which a predetermined dimension is shifted in the direction and the width direction is exemplified. In the case of the above 1) or 3), the front wall portion arranged on the lower stage side and the front wall section arranged on the upper stage side are engaged with each other in an uneven manner in a state where the stacking blocks are stacked in a plurality of stages. In the state of 3) or 3), adjacent front wall portions engage with each other in a concavo-convex manner in a state where the stacked blocks are arranged in the width direction. In this way, by superposing the two plate members constituting the front wall portion in a mutually displaced state, the so-called front wall portion functions as a male-female joint, increasing the adhesion between adjacent stacking blocks, It is possible to effectively prevent the concrete from flowing out between adjacent stacking blocks at the time of installation, and also effectively improve the assembling strength of the adjacent stacking blocks, so that the pressure from the back soil acting on the stacking blocks and the concrete It is possible to sufficiently withstand the pressure during placing.
以上説明したように本発明によれば、控え壁部のみのならず、連結部もコンクリート内に埋め込まれる態様であるため、積みブロック自体の前方への位置ずれ又は抜け落ち等を防止し、コンクリート硬化後の壁体の安定性を有効に向上させることができる。加えて、連結部が控え壁部の下端部位同士を連結するものであるため、連結部が控え壁部の上端部から下端部に亘る部位を連結する場合と比較してスムーズな打設作業を確保することができ、作業効率の向上に資する。   As described above, according to the present invention, not only the retaining wall part but also the connecting part is embedded in the concrete, so that the stacking block itself is prevented from being displaced forward or dropped, and the concrete is hardened. The stability of the rear wall body can be effectively improved. In addition, since the connecting portion connects the lower end portions of the retaining wall portion, a smooth driving operation can be performed as compared with the case where the connecting portion connects the portions extending from the upper end portion to the lower end portion of the retaining wall portion. It can be secured and contributes to the improvement of work efficiency.
以下、本発明の一実施形態を、図面を参照して説明する。   Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
本実施形態に係る積みブロックBは、図1及び図2(図1(a)、(b)は、それぞれ積みブロックBの全体斜視図、(a)におけるX−X線断面図であり、図2は壁体Wの断面を模式的に示す図である)等に示すように、複数段積み上げることにより擁壁等の壁体Wを構築し得るものであり、壁体Wの正面を形成する板状の正面壁部B1と、正面壁部B1から後方に向かって延出する一対の控え壁部B2と、これら控え壁部B2の下端部位同士を連結する連結部B3とを備えている。本実施形態に係る積みブロックBは、例えば巾寸法2500mm、高さ寸法750mmの比較的大型なものである。なお、積みブロックBの巾寸法を、運搬トラックの巾寸法より若干小さく設定することにより、運搬効率・積載効率の向上を図っている。   1 and FIG. 2 (FIGS. 1A and 1B are respectively an overall perspective view of the stacking block B, and a cross-sectional view taken along line XX in FIG. 2 is a diagram schematically showing a cross section of the wall body W), and the wall body W such as a retaining wall can be constructed by stacking a plurality of stages, and forms the front surface of the wall body W. A plate-shaped front wall B1, a pair of retaining wall portions B2 extending rearward from the front wall portion B1, and a connecting portion B3 for connecting lower end portions of these retaining wall portions B2 are provided. The stacking block B according to the present embodiment is a relatively large block having a width dimension of 2500 mm and a height dimension of 750 mm, for example. In addition, improvement of conveyance efficiency and loading efficiency is aimed at by setting the width dimension of the stacking block B slightly smaller than the width dimension of a conveyance truck.
正面壁部B1は、共に正面視概略矩形状をなす同一形状の前板部B11と後板部B12とを用いてなり、これら前板部B11及び後板部B12を高さ方向及び巾方向に所定寸法ずらした状態で厚み方向に重合させたものであり、本実施形態では、前板部B11の上端部を後板部B12の上端部よりも上方に位置付けている。前板部B11及び後板部B12の上下端部及び両側端部はそれぞれ略フラット状をなす。そして、積みブロックBを複数段積み上げた状態において下段側に配した正面壁部B1と上段側に配した正面壁部B1とが相互に凹凸係合するとともに、巾方向に並設した状態において隣接する正面壁部B1同士が相互に凹凸係合するようにしている。つまり、本実施形態における正面壁部B1は、いわゆるオスメス継ぎ手として機能するものである。   The front wall portion B1 is composed of the front plate portion B11 and the rear plate portion B12 having the same shape, both of which are substantially rectangular when viewed from the front, and the front plate portion B11 and the rear plate portion B12 are arranged in the height direction and the width direction. In the present embodiment, the upper end portion of the front plate portion B11 is positioned above the upper end portion of the rear plate portion B12. The upper and lower ends and both end portions of the front plate portion B11 and the rear plate portion B12 are substantially flat. The front wall B1 arranged on the lower side and the front wall B1 arranged on the upper side in the state in which the stacking blocks B are stacked in a plurality of stages are engaged with each other and are adjacent in the state where they are juxtaposed in the width direction. The front wall portions B1 to be engaged with each other are engaged with each other. That is, the front wall B1 in the present embodiment functions as a so-called male-female joint.
控え壁部B2は、正面壁部B1と略同一高さ寸法を有し且つ正面壁部B1の後板部B12から正面壁部B1の長手方向に略直交する方向に延出するものであり、略フラット状の上端部及び下端部を、それぞれ正面壁部B1の後板部B12の上端部及び下端部と略一致させたものである。各控え壁部B2に、積みブロックBの長手方向に沿って相互に符合する部位に、厚み方向に貫通する貫通孔B2aを形成している。また、図3(同図(a)、(b)、(c)は、それぞれ図1におけるY−Y線断面図、図3(a)の仮想円1の拡大図、同仮想円2の拡大図である)に示すように、各控え壁部B2の上端部にインサートナットB2bを埋設し、このインサートナットB2bに概略棒状の係合突部たるガイドキーB2cを螺合可能にするとともに、下端部に、積みブロックBを複数段積み上げた状態において下段側に配した控え壁部B2のインサートナットB2bに螺合したガイドキーB2cが係合可能な係合凹部B2dを設けている。   The retaining wall portion B2 has substantially the same height as the front wall portion B1 and extends from the rear plate portion B12 of the front wall portion B1 in a direction substantially orthogonal to the longitudinal direction of the front wall portion B1, The substantially flat upper end portion and lower end portion are made to substantially coincide with the upper end portion and the lower end portion of the rear plate portion B12 of the front wall portion B1. A through hole B2a penetrating in the thickness direction is formed in each retaining wall portion B2 at a portion that coincides with each other along the longitudinal direction of the stacking block B. 3 (a), (b), and (c) are cross-sectional views taken along line YY in FIG. 1, an enlarged view of the virtual circle 1 in FIG. 3 (a), and an enlarged view of the virtual circle 2, respectively. As shown in the figure, an insert nut B2b is embedded in the upper end portion of each retaining wall portion B2, and a guide key B2c, which is a substantially rod-shaped engagement protrusion, can be screwed into the insert nut B2b, and the lower end An engaging recess B2d that can engage with a guide key B2c that is screwed into an insert nut B2b of a retaining wall B2 that is arranged on the lower side in a state where a plurality of stacking blocks B are stacked is provided in the portion.
連結部B3は、各控え壁部B2の内面部間に設けられ控え壁部B2より小さい高さ寸法を有するものである。なお、控え壁部B2に形成した貫通孔B2aの下縁部を、連結部B3の上端部よりも上方に設定している。   The connecting portion B3 is provided between the inner surface portions of the respective retaining wall portions B2, and has a height dimension smaller than the retaining wall portion B2. In addition, the lower edge part of through-hole B2a formed in the retaining wall part B2 is set above the upper end part of connection part B3.
また、図1(b)及び図2に示すように、正面壁部B1のうち、後打ちのコンクリートCの打設仕上げ面Caと略同じ高さ位置に、他の部位より後方に窪ませてなる薄肉部B1aを設けている。本実施形態では、この薄肉部B1aを、正面壁部B1のうち、少なくとも一対の控え壁部B2間に相当する部位に設けている。   Moreover, as shown in FIG.1 (b) and FIG. 2, in the front wall part B1, it dents back from other site | parts in the height position substantially the same as the placement finishing surface Ca of the concrete C of the back-placement. The thin part B1a which becomes is provided. In this embodiment, this thin part B1a is provided in the site | part corresponded at least between a pair of retaining wall part B2 among front wall parts B1.
本実施形態に係る積みブロックBは、積み姿勢、すなわち起立させた姿勢において自立可能に設定している。この場合、正面壁部B1の下面部、控え壁部B2の下面部、及び連結部B3の下面部の全部、又は一部が接地することにより自立し得るようにしている。   The stacking block B according to the present embodiment is set so as to be able to stand on its own in a stacked position, that is, in a standing position. In this case, all or a part of the lower surface portion of the front wall portion B1, the lower surface portion of the retaining wall portion B2, and the lower surface portion of the connecting portion B3 can be grounded.
次に、このような積みブロックBを用いて壁体Wを構築する手順及び作用について、図2等を参照しながら説明する。   Next, the procedure and operation for constructing the wall body W using such a stacking block B will be described with reference to FIG.
先ず、背土Gを転圧し、積みブロックBの基礎となる基礎ブロックFを埋設する。次いで、壁体Wの最下段を形成する複数の積みブロックBを、隣接する正面壁部B1同士を凹凸係合させながら転圧した背土Gの前方に巾方向に沿って並設する。この状態において、背土Gの転圧後の高さ寸法(以下、「転圧高さ寸法」と称す)が積みブロックBの高さ寸法より小さくなるように、予め背土Gの転圧高さ寸法を設定しておく。本実施形態では、背土Gの転圧高さ寸法を、積みブロックBの高さ寸法の略3分の2に設定している。また、本実施形態に係る積みブロックBは、積み姿勢(起立姿勢)で自立するため、別途に専用のサポート部材を積みブロックBに添設させる必要がなく、単に基礎となる地盤に載置するだけでよく、施工効率を高めることができる。   First, the back soil G is rolled to embed a foundation block F as a foundation of the stacking block B. Next, a plurality of stacked blocks B forming the lowermost stage of the wall body W are juxtaposed along the width direction in front of the back soil G that has been compressed while engaging adjacent front wall portions B1 with each other. In this state, the compaction height of the back soil G is previously set so that the height dimension after the compaction of the back soil G (hereinafter referred to as “rolling height dimension”) is smaller than the height dimension of the stacking block B. Set the dimensions. In the present embodiment, the rolling compaction height dimension of the back soil G is set to approximately two thirds of the height dimension of the stacking block B. Further, since the stacking block B according to the present embodiment is self-supporting in a stacking posture (standing posture), it is not necessary to separately attach a dedicated support member to the stacking block B, and is simply placed on the foundation ground. It is only necessary to improve the construction efficiency.
そして、巾方向に連通する各控え壁部B2の貫通孔B2aに図示しない共通の鋼材を挿入する。鋼材としては、例えばH鋼やI鋼が挙げられる。なお、鋼材を貫通孔B2aに挿入した状態において、貫通孔B2aは鋼材によって完全に閉塞されていない。   And the common steel material which is not illustrated is inserted in through-hole B2a of each retaining wall part B2 connected to the width direction. Examples of the steel material include H steel and I steel. In the state where the steel material is inserted into the through hole B2a, the through hole B2a is not completely closed by the steel material.
次に、積みブロックBの背後にコンクリートCを打設する。これにより、控え壁部B2及び連結部B3がコンクリートC内に埋め込まれるとともに、コンクリートCは控え壁部B2の貫通孔B2aを介して隣接する積みブロックBに向かって順次流れ込む。そして積みブロックBと背土Gとの間にも流れ込んだコンクリートCの打設仕上げ面Caを、転圧した背土Gの上面部Gaに略一致させる。すなわち、コンクリートCの打設仕上げ面Caを積みブロックBの上端部Baより低く設定している。これによりコンクリートCが積みブロックBの目地から漏れないようにしている。   Next, concrete C is placed behind the stacking block B. Accordingly, the retaining wall portion B2 and the connecting portion B3 are embedded in the concrete C, and the concrete C sequentially flows toward the adjacent stacking block B through the through hole B2a of the retaining wall portion B2. Then, the finishing finish surface Ca of the concrete C that has also flowed between the stacking block B and the back soil G is made to substantially coincide with the upper surface portion Ga of the compacted back soil G. That is, the finishing surface Ca of the concrete C is set lower than the upper end portion Ba of the stacking block B. This prevents the concrete C from leaking from the joints of the stacking block B.
次いで、新たに背土Gを転圧する。新たに転圧する背土Gの転圧高さ寸法を、単一の積みブロックBの高さ寸法に略同一に設定し、壁体Wの2段目を形成する複数の積みブロックBを壁体Wの最下段を形成する各積みブロックBに積み重ねる。その結果、新たに転圧した背土Gの上面部Gaが、壁体Wの2段目を形成する複数の積みブロックBの上端部Baより低くなる。なお、積みブロックBを積み重ねる際に、壁体Wの最下段を形成する各積みブロックBの控え壁部B2のインサートナットB2bに螺合したガイドキーB2cに、壁体Wの2段目を形成する積みブロックBの控え壁部B2に形成した係合凹部B2dを係合させるとともに、高さ方向に重合する正面壁部B1同士を係合させる。また、本実施形態では、壁体Wの2段目を形成する複数の積みブロックBを壁体Wの最下段を形成する各積みブロックBに積み重ねる前に、壁体Wの最下段を形成する各積みブロックBの控え壁部B2の上面部にライナープレート等の目地材Lを載置し、積みブロックBの目地角度を調整するようにしている。なお、目地材Lの所定部位に形成した挿入孔LaにガイドキーB2cを挿入することにより、目地材Lが積みブロックBから不意に抜け落ちないようにしている。   Next, the back soil G is newly rolled. The rolling height dimension of the back soil G to be newly compacted is set to be substantially the same as the height dimension of the single stacking block B, and the plurality of stacking blocks B forming the second stage of the wall body W are wall bodies. Stacked on each stacking block B forming the lowermost stage of W. As a result, the upper surface portion Ga of the newly-rolled back soil G becomes lower than the upper end portions Ba of the plurality of stacking blocks B that form the second stage of the wall body W. When stacking the stacking blocks B, the second step of the wall body W is formed on the guide key B2c screwed into the insert nut B2b of the retaining wall portion B2 of each stacking block B that forms the lowest step of the wall body W. The engaging recess B2d formed in the retaining wall B2 of the stacking block B to be engaged is engaged, and the front wall portions B1 that overlap in the height direction are engaged with each other. Moreover, in this embodiment, before stacking the plurality of stack blocks B forming the second stage of the wall body W on the stack blocks B forming the bottom stage of the wall body W, the bottom stage of the wall body W is formed. A joint material L such as a liner plate is placed on the upper surface portion of the retaining wall portion B2 of each stack block B, and the joint angle of the stack block B is adjusted. The joint material L is prevented from unexpectedly falling out of the stacking block B by inserting the guide key B2c into the insertion hole La formed in a predetermined portion of the joint material L.
引き続き、壁体Wの2段目を形成する複数の積みブロックBの背後にコンクリートCを打設し、このコンクリートCの打設仕上げ面Caを背土Gの上面部Gaに一致させる。なお、図2からも明らかなように、このコンクリートCの一部が、壁体Wの最下段を形成する各積みブロックBの背後にも流れ込み、コンクリートCを、壁体Wの2段目を形成する複数の積みブロックBのみならず、壁体Wの最下段を形成する各積みブロックBにも一体化させるようにしている。このように、最下段の積みブロックBに対して打設するコンクリートCの打設仕上げ面Caを最下段の積みブロックBの上端部Baより低く設定することにより、2段目以上の積みブロックBに対して打設するコンクリートCが、当該積みブロックBに加えて、当該積みブロックBの下方に位置する積みブロックBにも流れ込んで一体化し、壁体Wの強度及び安定性を高めている。   Subsequently, the concrete C is placed behind the plurality of stacked blocks B forming the second stage of the wall body W, and the placement finish surface Ca of the concrete C is made to coincide with the upper surface portion Ga of the back soil G. As is clear from FIG. 2, a part of this concrete C also flows behind each stacking block B that forms the lowermost stage of the wall W, and the concrete C passes through the second stage of the wall W. Not only a plurality of stacked blocks B to be formed, but also each stacked block B forming the lowermost stage of the wall body W is integrated. Thus, by setting the finishing surface Ca of the concrete C to be placed on the lowermost stack block B to be lower than the upper end portion Ba of the lowermost stack block B, the second and higher stack blocks B are set. In addition to the stacking block B, the concrete C to be poured flows into and integrates the stacking block B located below the stacking block B, thereby improving the strength and stability of the wall body W.
以上の手順、すなわち、(i)背土Gの転圧→(ii)積みブロックBの積み重ね→(iii)コンクリートCの打設、を複数回繰り返すことにより所定の高さ寸法を有する壁体Wを構築することができる。なお、壁体Wの最上段を形成する積みブロックBBの高さ寸法を、壁体Wの他段を形成する積みブロックBよりも小さく設定し、背土Gの上面部Gaと積みブロックBBの上端部BBaとが一致するようにしている。   The wall W having a predetermined height by repeating the above procedure, i.e., (i) rolling of the back soil G → (ii) stacking of the building blocks B → (iii) placing the concrete C. Can be built. In addition, the height dimension of the building block BB which forms the uppermost stage of the wall body W is set smaller than the building block B which forms the other stage of the wall body W, and the upper surface portion Ga of the back soil G and the building block BB The upper end portion BBa coincides with the upper end portion BBa.
このように本実施形態に係る積みブロックBは、壁体Wの正面を形成する板状の正面壁部B1と、正面壁部B1と略同一高さ寸法を有し且つ正面壁部B1から後方に向かって延出する一対の控え壁部B2と、これら控え壁部B2の下端部位同士を連結する連結部B3とを備えたものであるため、控え壁部B2のみのならず、連結部B3もコンクリートC内に埋め込まれる態様、すなわち正面壁部B1の長手方向に対して略直交する方向に延びる部位と、正面壁部B1の長手方向に対して略平行に延びる部位がコンクリートC内に埋め込まれる態様であるため、背土Gの土圧によって積みブロックB自体が前方へ位置ずれする又は抜け落ちる等の不具合が生じ難く、コンクリートC硬化後の壁体Wの安定性を有効に向上させることができる。加えて、連結部B3が控え壁部B2の下端部位同士を連結するものであるため、連結部B3が控え壁部B2の上端部から下端部に亘る部位を連結する場合と比較してコンクリートCの打設作業をスムーズに行うことができ、作業効率の向上に資する。また、連結部B3がコンクリートCを打設する際にコンクリートの型枠としても機能するため、別途にコンクリート打設用の型枠を枠組みする必要がなく、作業時間を短縮することができ、コストも低減することができる。さらに、本実施形態では、コンクリートCの打設仕上げ面Caを積みブロックBの上端部Baよりも低く設定しているため、略フラット状をなす控え壁部B2の上端部がプレキャスト化した基礎面として機能し、積み上げた積みブロックBの安定性を確保できる。殊に、本実施形態では、大型の積みブロックBを適用しているため、積み上げ個数を抑えることができるとともに、それに伴い背土Gを転圧する回数及びコンクリートCの打設回数を抑えることができ、現場における作業時間、工程日数及び作業員数を少なくすることが可能となり、コストダウンを図り、作業環境を改善した積みブロックBを提供することができる。   As described above, the stacking block B according to this embodiment has a plate-like front wall portion B1 that forms the front surface of the wall body W, and has substantially the same height as the front wall portion B1, and is rearward from the front wall portion B1. Since it has a pair of retaining wall portions B2 extending toward the bottom and a connecting portion B3 that connects the lower end portions of these retaining wall portions B2, not only the retaining wall portion B2 but also the connecting portion B3 Embedded in the concrete C, that is, a portion extending in a direction substantially orthogonal to the longitudinal direction of the front wall B1 and a portion extending substantially parallel to the longitudinal direction of the front wall B1 are embedded in the concrete C. Therefore, it is difficult to cause problems such as the displacement of the stacking block B due to the earth pressure of the back soil G or the falling out of the soil, and it is possible to effectively improve the stability of the wall body W after hardening the concrete C. it can. In addition, since the connecting portion B3 connects the lower end portions of the retaining wall portion B2, the concrete C in comparison with the case where the connecting portion B3 connects the portion extending from the upper end portion to the lower end portion of the retaining wall portion B2. Can be carried out smoothly and contributes to the improvement of work efficiency. Further, since the connecting part B3 also functions as a concrete formwork when placing the concrete C, there is no need to separately form a concrete formwork and the work time can be shortened. Can also be reduced. Furthermore, in this embodiment, since the casting finish surface Ca of the concrete C is set lower than the upper end portion Ba of the stacking block B, the basic surface in which the upper end portion of the retaining wall portion B2 having a substantially flat shape is precast. The stability of the stacked stacking block B can be ensured. In particular, in this embodiment, since the large stack block B is applied, the number of stacked piles can be suppressed, and the number of times the back soil G is rolled and the number of times of placing the concrete C can be reduced accordingly. It is possible to reduce the working time, the number of process days, and the number of workers at the site, and it is possible to provide a stacking block B that is reduced in cost and improved in the working environment.
特に、一対の控え壁部B2が、それぞれ厚み方向に貫通する貫通孔B2aを有するものであるため、控え壁部B2がコンクリートCの流通を閉塞する閉塞部となることを防止し、コンクリートCの流通を確保することができるとともに、積みブロックBとコンクリートCとの一体性を有効に高めることができる。しかも、積みブロックBを巾方向に複数並べた状態で連通する各貫通孔B2aに共通の鋼材を挿入可能にしているため、巾方向に並設する積みブロックBの一体性をも有効に向上させることができる。   In particular, since the pair of retaining wall portions B2 each have a through hole B2a that penetrates in the thickness direction, the retaining wall portion B2 is prevented from becoming a closed portion that blocks the flow of the concrete C, and the concrete C Distribution can be secured and the integrity of the stacking block B and the concrete C can be effectively increased. Moreover, since a common steel material can be inserted into each through hole B2a that communicates in a state in which a plurality of stacking blocks B are arranged in the width direction, the integrity of the stacking blocks B arranged in parallel in the width direction is also effectively improved. be able to.
さらに、一対の控え壁部B2の上端部に、係合突部たるガイドキーB2cを設け、下端部にガイドキーB2cが係合可能な係合凹部B2dを設けているため、積みブロックBの積み上げ作業を正確且つスムーズに行うことができる。加えて、このガイドキーB2cを固定点として目地材Lを取付可能にしているため、この目地材L専用の固定部材を別途設ける必要もなく、部品点数の削減に資する。また、本実施様態のように大型の積みブロックBを適用する場合に、たとえ積みブロックBの大型化により壁体Wの傾斜角度を調整できる目地が少ない場合であっても、目地材Lにより、壁体Wの傾斜角度を容易且つ好適に調整することができる。   Further, since the guide key B2c, which is an engaging protrusion, is provided at the upper end of the pair of retaining walls B2, and the engaging recess B2d that can be engaged with the guide key B2c is provided at the lower end, the stacking block B is stacked. Work can be performed accurately and smoothly. In addition, since the joint material L can be attached using the guide key B2c as a fixing point, there is no need to separately provide a fixing member dedicated to the joint material L, which contributes to a reduction in the number of parts. Further, when applying a large stacking block B as in the present embodiment, even if there are few joints where the inclination angle of the wall body W can be adjusted by increasing the size of the stacking block B, the jointing material L The inclination angle of the wall body W can be easily and suitably adjusted.
また、巾方向及び高さ方向に隣接する積みブロックBが、各正面壁部B1を構成する前板部B11及び後板部B12を凹凸係合させて相互に接合する態様であるため、コンクリートCが積みブロックBの目地から漏れないようにすることができる。また、積みブロックBの目地とコンクリートCの打設仕上げ面Caが同一面とならないようにしているため、積みブロックBの目地とコンクリートCの打設仕上げ面Caが同一面である場合と比較して、コンクリートCの打設仕上げ面Caが次に積み上げる積みブロックBの基礎面として機能しないため、大きな面積を有するコンクリートCの打設仕上げ面Caを人的に平滑に仕上げる必要がなく、作業をよりスムーズに行うことができる。   Moreover, since the stacking block B adjacent to the width direction and the height direction is an aspect in which the front plate portion B11 and the rear plate portion B12 constituting each front wall portion B1 are engaged with each other by being unevenly engaged, the concrete C Can be prevented from leaking from the joints of the stacking block B. Moreover, since the joint of the stacking block B and the casting finish surface Ca of the concrete C are not flush with each other, the joint of the stacking block B and the casting finish surface Ca of the concrete C are the same. Then, since the finishing surface Ca of the concrete C does not function as the foundation surface of the next stacked block B, it is not necessary to manually finish the casting finishing surface Ca of the concrete C having a large area. It can be performed more smoothly.
加えて、正面壁部B1のうち、コンクリートCの打設仕上げ面Caと略同じ高さ位置に薄肉部B1aを形成し、この薄肉部B1aを適宜の手段で破って正面壁部B1にコンクリートCの打設仕上げ面Caと連通する開口部を形成可能にしているため、コンクリートCのブリーディングによる水や表面処理水の排水を、開口部を利用して好適に行うことができる。また、この開口部に別途排水用パイプを設けることにより、上記処理水等を簡単に誘導排水することが可能である。さらに、開口部に一端部を固定した線状の鋼材(ワイヤ等)を、その他端部を背土G内に埋め込んでアンカーとして機能させることも可能であるため、直立又は直立に近い角度で積みブロックBを高く積み重ねることができる。   In addition, the thin wall portion B1a is formed in the front wall portion B1 at substantially the same height as the placement finish surface Ca of the concrete C, and the thin wall portion B1a is broken by an appropriate means to form the concrete C on the front wall portion B1. Since it is possible to form an opening communicating with the finish finish surface Ca, drainage of water by surface bleeding of concrete C or surface treated water can be suitably performed using the opening. Further, by providing a separate drainage pipe at the opening, the treated water or the like can be easily drained by induction. In addition, linear steel materials (wires, etc.) with one end fixed to the opening can be embedded in the back soil G and function as anchors. Block B can be stacked high.
さらに、積み姿勢で自立可能なものであるため、積み作業時に、積みブロックBを例えば後方からサポートする専用のサポート部材を別途に用意する必要がなく、積み作業をスムーズに進めることができるとともに、不要な部材(サポート部材)を現場に搬入・搬出する手間を省くことができ、工期短縮化をも有効に図ることができる。   Furthermore, since it can be self-supporting in the stacking posture, it is not necessary to separately prepare a dedicated support member that supports the stacking block B from the rear, for example, during the stacking operation, and the stacking operation can proceed smoothly. It is possible to save the trouble of carrying in and out unnecessary members (support members) on site, and it is possible to effectively shorten the construction period.
殊に、正面壁部B1が、前板部B11と後板部B12とを厚み方向に重合してなり、前板部B11と後板部B12とを高さ方向及び巾方向に沿って所定寸法ずらしたものであるため、積みブロックBを複数段積み上げた状態において下段側に配した正面壁部B1と上段側に配した正面壁部B1とが相互に凹凸係合するとともに、積みブロックBを巾方向に複数並設した状態において隣接する正面壁部B1同士が相互に凹凸係合するため、隣接する積みブロックB同士の密着度が向上し、コンクリートCの打設時にコンクリートCが隣接する積みブロックB間から流出することを有効に防止することができる。また、この積みブロックBを複数段積んだ場合には、前記凹凸係合により隣接する積みブロックBの組付強度も向上するため、積みブロックBに作用する背土Gからの圧力やコンクリートCの圧力に十分に耐え得ることができ、実用性に優れたものとなる。特に、本実施形態では、図3(a)に示すように、前板部B11の上端部が後板部B12の上端部より上方に位置するように前板部B11と後板部B12とを重合させているため、相対的に上段側に位置する積みブロックBの後板部B12の前方に、相対的に下段側に位置する積みブロックBの前板部B11が位置付けられることとなり、上段側の積みブロックBが前記圧力により前方に滑り落ちる又は抜け落ちることを防止することができる。   In particular, the front wall B1 is formed by superimposing the front plate B11 and the rear plate B12 in the thickness direction, and the front plate B11 and the rear plate B12 have predetermined dimensions along the height direction and the width direction. The front wall B1 disposed on the lower side and the front wall B1 disposed on the upper side in the state where the stacking blocks B are stacked in a plurality of stages are engaged with each other in an uneven manner, and the stacking block B is Since the adjacent front wall portions B1 are unevenly engaged with each other in a state where a plurality of them are juxtaposed in the width direction, the adhesion between the adjacent stack blocks B is improved, and the concrete C is adjacent to the stack when the concrete C is placed. Outflow between the blocks B can be effectively prevented. Further, when the stacking blocks B are stacked in a plurality of stages, the assembling strength of the adjacent stacking blocks B is also improved by the uneven engagement, so that the pressure from the back soil G acting on the stacking blocks B and the concrete C It can sufficiently withstand the pressure and has excellent practicality. In particular, in the present embodiment, as shown in FIG. 3A, the front plate portion B11 and the rear plate portion B12 are arranged so that the upper end portion of the front plate portion B11 is located above the upper end portion of the rear plate portion B12. Since it is superposed, the front plate part B11 of the stacking block B positioned relatively on the lower stage side is positioned in front of the rear plate part B12 of the stacking block B positioned relatively on the upper stage side. It is possible to prevent the stacking block B from slipping forward or falling off due to the pressure.
なお、本発明は、以上に詳述した実施形態に限られるものではない。   The present invention is not limited to the embodiment described in detail above.
例えば、打設するコンクリートの流通を確保する手段として、控え壁部に、貫通孔ではなく、切欠を形成し、この切欠により、控え壁部がコンクリートの閉塞部となることを防止するようにしてもよい。   For example, as a means of ensuring the distribution of the concrete to be placed, a notch is formed in the retaining wall portion instead of a through hole, and this notch prevents the retaining wall portion from becoming a closed portion of the concrete. Also good.
また、上記実施形態では、係合突部の一態様として、控え壁部に埋設したインサートナットに螺合したガイドキーを示したが、これに限らず、例えば、控え壁部にインサートナットを設けず、ガイドキーを控え壁部に直接取り付けた態様や、ガイドキー等の係合突部を控壁部に一体に設けた態様を採用してもよい。また、係合突部の個数や形状は適宜変更してもよく、この場合、係合突部に対応させて係合凹部の個数や形状を適宜変更すればよい。なお、係合突部を控え壁部の下端部に設けるとともに、係合凹部を控え壁部の上端部に設けるようにしても構わない。   Moreover, in the said embodiment, although the guide key screwed together with the insert nut embed | buried under the retaining wall part was shown as one aspect | mode of an engagement protrusion, not only this but an insert nut is provided in a retaining wall part, for example Instead, a mode in which the guide key is directly attached to the retaining wall portion, or a mode in which an engaging protrusion such as a guide key is integrally provided on the retaining wall portion may be employed. Further, the number and shape of the engaging protrusions may be changed as appropriate. In this case, the number and shape of the engaging recesses may be changed as appropriate in correspondence with the engaging protrusion. In addition, while providing an engaging protrusion in the lower end part of a retaining wall part, you may make it provide an engaging recessed part in the upper end part of a retaining wall part.
また、正面壁部の態様としては、前記実施形態では、前板部と後板部とを高さ方向及び巾方向に所定寸法ずらしたものを例示したが、これに限らず、前板部と後板部とを高さ方向にのみ所定寸法ずらしたもの、又は、前板部と後板部とを巾方向にのみ所定寸法ずらしたものであっても構わない。このようなものであっても正面壁部をオスメス継ぎ手として機能させることができる。   In addition, as an aspect of the front wall portion, in the above-described embodiment, the front plate portion and the rear plate portion are exemplified by shifting the predetermined dimension in the height direction and the width direction, but not limited thereto, the front plate portion and The rear plate portion may be shifted by a predetermined dimension only in the height direction, or the front plate portion and the rear plate portion may be shifted by a predetermined dimension only in the width direction. Even if it is such, a front wall part can be functioned as a male-female joint.
また、正面壁部は、少なくとも前板部と後板部とを重合させたものであればよく、前板部と後板部との間に中間板部が存在するものであっても構わない。   Further, the front wall portion only needs to be obtained by polymerizing at least the front plate portion and the rear plate portion, and may have an intermediate plate portion between the front plate portion and the rear plate portion. .
さらに、積みブロックの搬入時に所定の重機等によって吊り上げ可能な吊り部を、積みブロックに一体又は一体的に設けてもよい。   Furthermore, a suspension part that can be lifted by a predetermined heavy machine or the like when the stacking block is carried in may be provided integrally or integrally with the stacking block.
また、積みブロックを用いて、河川の護岸や道路の盛土、あるいは切土斜面の壁体を構築するようにしても勿論構わない。   Of course, the building blocks may be used to construct riverwalls, road embankments, or walls of cut slopes.
その他、各部の具体的構成についても上記実施形態に限られるものではなく、本発明の趣旨を逸脱しない範囲で種々変形が可能である。   In addition, the specific configuration of each part is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
本発明の一実施形態に係る積みブロックを示す図。The figure which shows the stacking block which concerns on one Embodiment of this invention. 同実施形態に係る積みブロックを用いて構築した壁体を模式的に示す図。The figure which shows typically the wall body constructed | assembled using the building block which concerns on the same embodiment. 図1におけるY−Y線断面を模式的に示す図。The figure which shows the YY sectional view typically in FIG.
符号の説明Explanation of symbols
B…積みブロック
B1…正面壁部
B2…控え壁部
B2a…貫通孔
B2c…係合突部(ガイドキー)
B2d…係合凹部
B3…連結部
W…壁体
B ... Stacking block B1 ... Front wall part B2 ... Retaining wall part B2a ... Through hole B2c ... Engaging protrusion (guide key)
B2d ... engaging recess B3 ... connecting part W ... wall

Claims (4)

  1. 複数段積み上げることにより擁壁等の壁体を構築し得る積みブロックであって、
    前記壁体の正面を形成する板状の正面壁部と、当該正面壁部と略同一高さ寸法を有し且つ正面壁部から後方に向かって延出する一対の控え壁部と、これら控え壁部の下端部位同士を連結する連結部とを具備してなり、
    前記正面壁部が前板部と後板部とを備えたものであり、前記前板部の上端部を前記後板部の上端部よりも上方に位置付け、前記後板部の下端部と前記控え壁部の下端部と前記連結部の下端部とを略一致させ、これら各下端部が接地することにより自立し得るようにし、
    前記控え壁部のうち前記連結部との連結部位における上端部又は下端部の何れか一方に係合突起を設け、他方に当該係合突起が係合可能な係合凹部を設けていることを特徴とする積みブロック。
    A building block that can build a wall such as a retaining wall by stacking multiple stages,
    A plate-like front wall portion that forms the front surface of the wall body, a pair of retaining wall portions having substantially the same height as the front wall portion and extending rearward from the front wall portion, and these retaining members A connecting portion that connects the lower end portions of the wall portion ,
    The front wall portion includes a front plate portion and a rear plate portion, the upper end portion of the front plate portion is positioned above the upper end portion of the rear plate portion, and the lower end portion of the rear plate portion and the The lower end portion of the retaining wall portion and the lower end portion of the connecting portion are substantially coincided with each other so that each lower end portion can stand on its own by grounding,
    An engagement projection is provided on either the upper end or the lower end of the connection portion with the connection portion of the retaining wall, and an engagement recess that can be engaged with the engagement projection is provided on the other. Feature building block.
  2. 前記一対の控え壁部が、それぞれ厚み方向に貫通する貫通孔を有するものであり、
    巾方向に複数並べた状態で符合する各貫通孔に共通の鋼材を挿入可能にしている請求項1記載の積みブロック。
    Each of the pair of retaining wall portions has through holes penetrating in the thickness direction,
    The stacking block according to claim 1, wherein a common steel material can be inserted into each through hole that matches in a state where a plurality of the holes are arranged in the width direction.
  3. 積み姿勢で自立可能なものである請求項1又は2記載の積みブロック。 The stacking block according to claim 1, wherein the stacking block is capable of supporting itself in a stacked posture.
  4. 前記正面壁部が前記前板部と前記後板部とを巾方向に沿って所定寸法ずらしたものである請求項1、2又は3記載の積みブロック。 The stacking block according to claim 1, 2, or 3, wherein the front wall portion is obtained by shifting the front plate portion and the rear plate portion by a predetermined dimension along the width direction.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7821862B2 (en) 2001-08-30 2010-10-26 Renesas Electronics Corporation Semiconductor memory circuit

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JP5715771B2 (en) * 2010-06-17 2015-05-13 晋市 湯田 Wall surface structure and wall surface construction method
JP2015169013A (en) * 2014-03-07 2015-09-28 ランデス株式会社 Permanent form for use in concrete quay, and construction method for concrete quay using the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7821862B2 (en) 2001-08-30 2010-10-26 Renesas Electronics Corporation Semiconductor memory circuit
US7995417B2 (en) 2001-08-30 2011-08-09 Renesas Electronics Corporation Semiconductor memory circuit

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