JP3204073U - Rebar reinforcement spacer - Google Patents
Rebar reinforcement spacer Download PDFInfo
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- JP3204073U JP3204073U JP2016000804U JP2016000804U JP3204073U JP 3204073 U JP3204073 U JP 3204073U JP 2016000804 U JP2016000804 U JP 2016000804U JP 2016000804 U JP2016000804 U JP 2016000804U JP 3204073 U JP3204073 U JP 3204073U
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- spacer
- reinforcing
- reinforcing bar
- lateral rib
- floor slab
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- 125000006850 spacer group Chemical group 0.000 title claims abstract description 71
- 230000002787 reinforcement Effects 0.000 title description 8
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 59
- 239000004567 concrete Substances 0.000 claims abstract description 23
- 239000000835 fiber Substances 0.000 claims abstract description 17
- 239000000463 material Substances 0.000 claims abstract description 15
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 10
- 239000004743 Polypropylene Substances 0.000 claims abstract description 8
- -1 polypropylene Polymers 0.000 claims abstract description 8
- 229920001155 polypropylene Polymers 0.000 claims abstract description 8
- 239000012779 reinforcing material Substances 0.000 claims description 6
- 239000002131 composite material Substances 0.000 abstract description 10
- 238000009434 installation Methods 0.000 abstract description 7
- 229910000831 Steel Inorganic materials 0.000 description 23
- 239000010959 steel Substances 0.000 description 23
- 239000011150 reinforced concrete Substances 0.000 description 5
- 239000004568 cement Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 210000003205 muscle Anatomy 0.000 description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000011900 installation process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 235000011389 fruit/vegetable juice Nutrition 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Landscapes
- Bridges Or Land Bridges (AREA)
Abstract
【課題】鉄筋の据え付け精度を確保できると共に、軽量化を図りつつ耐久性を向上可能な鉄筋配筋用スペーサを提供する。【解決手段】合成床版上に配筋される配力筋Ｒ２の高さ位置を規定するための鉄筋配筋用スペーサ２０において、合成床版上に左右方向に向けて固定された横リブ１２の両側面を挟持するように横リブ１２に上方から係合されて前後方向の移動を規制する係合部２０ａであって、横リブ１２の上面に面接触可能な当接部２０ｄを備えた係合部２０ａと、前後方向に延びる配力筋Ｒ２を位置決め状態に載置可能な載置部２０ｂとを有し、係合部２０ａと載置部２０ｂとをポリプロピレン繊維を含むモルタルコンクリート材料で一体的に形成している。【選択図】図３The present invention provides a reinforcing bar reinforcing spacer capable of ensuring the installation accuracy of reinforcing bars and improving durability while reducing the weight. In a reinforcing bar reinforcing spacer 20 for defining a height position of a reinforcing bar R2 to be arranged on a composite floor slab, a lateral rib 12 fixed on the composite floor slab in the left-right direction. An engagement portion 20a that is engaged with the horizontal rib 12 from above so as to sandwich both side surfaces of the plate and restricts movement in the front-rear direction, and includes an abutment portion 20d that can be brought into surface contact with the upper surface of the horizontal rib 12. The engaging portion 20a and a placement portion 20b on which the distribution bars R2 extending in the front-rear direction can be placed in a positioning state. The engagement portion 20a and the placement portion 20b are made of a mortar concrete material including polypropylene fibers. It is formed integrally. [Selection] Figure 3
Description
本考案は、床版上に配筋される鉄筋の高さ位置を規定するための鉄筋配筋用スペーサに関する。 The present invention relates to a reinforcing bar reinforcing spacer for defining a height position of a reinforcing bar arranged on a floor slab.
従来、底鋼板とコンクリート版とを一体化した合成床版等の鉄筋コンクリート構造物では、底鋼板及び主筋や配力筋等の鉄筋が引張り力を分担し、コンクリートが圧縮力を分担する機能分担によって構造物の強度を確保している。
合成床版を用いた橋梁は、橋軸直交方向に延びる複数の横リブや表面から立設されたスタッドを備えると共に防錆処理が施された底鋼板を主桁に設置する底鋼板設置工程と、側鋼板を底鋼板の両端部に設置する側鋼板設置工程と、底鋼板上の所定位置に鉄筋を配筋する鉄筋設置工程と、底鋼板上にコンクリートを打設するコンクリート打設工程と、コンクリートの硬化後、側鋼板に高欄等を形成する高欄構造形成工程によって建設される。
Conventionally, in a reinforced concrete structure such as a composite floor slab that integrates a bottom steel plate and a concrete plate, the bottom steel plate and the reinforcing bars such as main bars and distribution bars share the tensile force, and the concrete shares the compression force. The strength of the structure is secured.
A bridge using a composite floor slab includes a bottom steel plate installation process in which a plurality of horizontal ribs extending in a direction perpendicular to the bridge axis and studs erected from the surface and a bottom steel plate subjected to rust prevention treatment are installed on the main girder A side steel plate installation step for installing side steel plates at both ends of the bottom steel plate, a reinforcing bar installation step for arranging reinforcing bars at predetermined positions on the bottom steel plate, and a concrete placing step for placing concrete on the bottom steel plate, After the concrete is hardened, it is constructed by a railing structure forming process for forming railings on the side steel plates.
上記鉄筋設置工程における鉄筋の設置位置は、鉄筋コンクリート構造物の強度や製造コストに大きな影響を与えるため、配筋には据え付け位置精度が要求されている。
底鋼板表面から主鉄筋の中心までの間隔（有効高さ）や主鉄筋の上端からコンクリート表面までの間隔（かぶり）が設定値よりも大きい場合、打設されるコンクリートの重量が増加し、コスト面で支障が生じる。また、かぶりが設定値よりも小さい場合、鉄筋を環境要因から保護する機能が低下し、鉄筋の塩害や錆の発生を招く虞がある。
そこで、有効高さやかぶりを施工図に規定されている寸法に精度良く管理するため、鉄筋を規定された位置に載置可能な鉄筋配筋用スペーサが用いられている。
Since the installation position of the reinforcing bar in the reinforcing bar installation process has a great influence on the strength and manufacturing cost of the reinforced concrete structure, the installation position accuracy is required for the reinforcement.
If the distance from the bottom steel plate surface to the center of the main rebar (effective height) or the distance from the top end of the main rebar to the concrete surface (cover) is larger than the set value, the weight of the concrete placed will increase and the cost will increase. This will cause problems. Moreover, when the fog is smaller than the set value, the function of protecting the reinforcing bar from environmental factors is lowered, and there is a risk of causing salt damage and rusting of the reinforcing bar.
Therefore, in order to accurately manage the effective height and the cover to the dimensions specified in the construction drawing, a reinforcing bar reinforcing spacer capable of placing the reinforcing bar at a specified position is used.
特許文献１のスペーサは、弾性体で構成され、一端側に設けられ且つ鉄筋に嵌合可能な開口部を有するＵ字状の複数の鉄筋用把持部と、他端側に設けられ且つ堰板や横リブ等の係止部材を把持可能なＵ字状の係止部材用把持部とが一体形成されている。
また、特許文献２のスペーサは、横リブの側面に夫々面接触可能な１対の金属製支持脚部材と、これら支持脚部材に係合可能なモルタル材料製スペーサ部材との３部材によって構成され、スペーサ部材に配力筋を横リブに対して直交方向に載置可能な載置部を形成している。
The spacer of Patent Document 1 is formed of an elastic body, and is provided on one end side and has a plurality of U-shaped grips for rebar having openings that can be fitted to the rebar, and is provided on the other end side and a dam plate And a U-shaped gripping member for a locking member capable of gripping a locking member such as a lateral rib.
The spacer of Patent Document 2 is composed of three members: a pair of metal support leg members that can come into surface contact with the side surfaces of the lateral ribs, and a mortar material spacer member that can engage with the support leg members. The spacer member is formed with a placement portion on which the distribution bar can be placed in a direction orthogonal to the lateral rib.
特許文献１のスペーサは、鉄筋と係止部材をスペーサ素材が保有する弾性力を利用して把持するため、配筋された鉄筋を確実に支持することができ、鉄筋コンクリート構造物のかぶりを確実に確保することが開示されている。
しかし、特許文献１の技術では、鉄筋の高さ位置を精度良く位置決めできない虞がある。
即ち、鉄筋や横リブ等をスペーサの弾性力によって把持しているため、コンクリートを打設する際、コンクリートの流動圧によってスペーサの装着位置が橋軸方向や係止部材の長さ方向へ変位することがあり、結果的に、鉄筋の高さ位置がずれるという問題がある。
また、コンクリート打設時、鉄筋用把持部と係止部材用把持部との境界部分に大きな応力が集中した場合、スペーサが破損する虞もある。そこで、スペーサを金属材料で製作することも考えられるが、金属スペーサは、設置からコンクリート打設までの期間においてスペーサが腐食し、コンクリート内の錆の残存と錆汁により底鋼板を汚すことがある。
Since the spacer of Patent Document 1 grips the reinforcing bar and the locking member by using the elastic force of the spacer material, the reinforcing bar can be reliably supported, and the covering of the reinforced concrete structure is reliably ensured. It is disclosed to ensure.
However, in the technique of Patent Document 1, there is a possibility that the height position of the reinforcing bar cannot be accurately positioned.
That is, because the reinforcing bars and horizontal ribs are gripped by the elastic force of the spacers, when placing concrete, the mounting position of the spacers is displaced in the direction of the bridge axis or the length of the locking member by the flow pressure of the concrete. As a result, there is a problem that the height position of the reinforcing bar is shifted.
Further, when concrete is placed, if a large stress is concentrated on the boundary portion between the reinforcing bar gripping portion and the locking member gripping portion, the spacer may be damaged. Therefore, it is conceivable to manufacture the spacer with a metal material. However, the metal spacer may corrode during the period from installation to concrete placement, and the bottom steel plate may be soiled by rust residue and rust juice in the concrete. .
特許文献２のスペーサは、横リブの上面に載置されたモルタル材料製スペーサ部材によって鉄筋を支持するため、鉄筋の高さ位置を精度良く位置決めすることができる。
しかし、特許文献２の技術では、スペーサが３部品で構成されているため、部品点数が増加し、その結果、部品管理や作業工程が増加する虞がある。
また、支持脚部とスペーサ部とを金属材料によって一体形成することも考えられるが、スペーサの全体重量が増加し、作業性が悪化する虞がある。
一方、モルタル材料によって一体形成した場合、特許文献１のスペーサと同様に、支持脚部とスペーサ部との境界部分に大きな応力が集中して破損する虞がある。
Since the spacer of patent document 2 supports a reinforcing bar with the spacer member made from the mortar material mounted on the upper surface of a horizontal rib, the height position of a reinforcing bar can be positioned accurately.
However, in the technique of Patent Document 2, since the spacer is composed of three parts, the number of parts increases, and as a result, there is a possibility that parts management and work processes increase.
Further, although it is conceivable to integrally form the support leg portion and the spacer portion with a metal material, the overall weight of the spacer increases, and the workability may be deteriorated.
On the other hand, when the mortar material is integrally formed, like the spacer of Patent Document 1, there is a possibility that a large stress concentrates on the boundary portion between the support leg portion and the spacer portion and breaks.
本考案の目的は、鉄筋の据え付け精度を確保できる鉄筋配筋用スペーサ、軽量化を図りつつ耐久性を向上可能な鉄筋配筋用スペーサ等を提供することである。 An object of the present invention is to provide a reinforcing bar reinforcing spacer capable of ensuring the installation accuracy of a reinforcing bar, a reinforcing bar reinforcing spacer capable of improving durability while reducing weight.
請求項１の鉄筋配筋用スペーサは、床版上に配筋される鉄筋の高さ位置を規定するための鉄筋配筋用スペーサにおいて、前記床版上に橋軸直交方向に向けて固定された横リブの両側面を挟持するように横リブに上方から係合されて橋軸方向の移動を規制する係合部と、前記橋軸方向に延びる鉄筋を位置決め状態に載置可能な載置部とを有し、前記係合部と載置部とを繊維強化材を含むモルタルコンクリート材料で一体的に形成したことを特徴としている。 The reinforcing bar reinforcing spacer according to claim 1 is a reinforcing bar reinforcing spacer for defining the height position of the reinforcing bar arranged on the floor slab, and is fixed on the floor slab in a direction perpendicular to the bridge axis. An engaging portion that is engaged with the lateral rib from above so as to sandwich both side surfaces of the lateral rib and restricts movement in the bridge axis direction, and a mounting that can place the reinforcing bar extending in the bridge axis direction in a positioning state The engaging part and the mounting part are integrally formed of a mortar concrete material including a fiber reinforcing material.
請求項２の考案は、請求項１の考案において、前記係合部が前記横リブの上面に面接触可能な当接部を備えたことを特徴としている。
請求項３の考案は、請求項１又は２の考案において、前記繊維強化材がポリプロピレン繊維であることを特徴としている。
The invention of claim 2 is characterized in that, in the invention of claim 1, the engaging portion includes a contact portion capable of surface contact with the upper surface of the lateral rib.
The device of claim 3 is characterized in that, in the device of claim 1 or 2, the fiber reinforcing material is polypropylene fiber.
請求項１の考案によれば、係合部が横リブの両側面を挟持することにより、係合部の橋軸方向への移動を規制でき、また、載置部が橋軸方向に延びる鉄筋を位置決め状態に載置することにより、鉄筋を精度良く位置決めすることができる。
係合部と載置部とを繊維強化材を含むモルタルコンクリート材料で一体的に形成したため、重量増加を伴うことなく係合部と載置部との境界部分を強化することができる。
According to the first aspect of the present invention, the engaging portion sandwiches both side surfaces of the lateral rib so that the movement of the engaging portion in the bridge axis direction can be restricted, and the placing portion extends in the bridge axis direction. Is placed in a positioning state, the rebar can be positioned with high accuracy.
Since the engaging portion and the placement portion are integrally formed of the mortar concrete material including the fiber reinforcement, the boundary portion between the engagement portion and the placement portion can be reinforced without increasing the weight.
請求項２の考案によれば、当接部が横リブの上面に面接触するため、スペーサの位置移動を摩擦力によって規制することができ、鉄筋の高さ位置を精度良く位置決めすることができる。
請求項３の考案によれば、簡単な構成で、係合部と載置部との境界部分を強化することができる。
According to the second aspect of the present invention, since the contact portion is in surface contact with the upper surface of the lateral rib, the position movement of the spacer can be regulated by the frictional force, and the height position of the reinforcing bar can be accurately positioned. .
According to the invention of claim 3, the boundary portion between the engaging portion and the placing portion can be reinforced with a simple configuration.
次に、考案を実施するための形態について、実施例に基づいて説明する。
尚、図において、矢印Ｆの橋軸方向を前方向とし、矢印Ｌの橋軸直交方向を左方向として説明する。
Next, the form for inventing is demonstrated based on an Example.
In the figure, the bridge axis direction indicated by the arrow F is defined as the front direction, and the bridge axis orthogonal direction indicated by the arrow L is defined as the left direction.
以下、本考案の実施例１について図１〜図４に基づいて説明する。
本実施例では、前後方向に延びる主桁２に支持された合成床版１によって構成された高架道路Ｂに用いる鉄筋配筋用スペーサ２０を例として主に説明する。
図１，図２に示すように、合成床版１は、底鋼板３と、主筋Ｒ１と配力筋Ｒ２とからなる鉄筋が配筋されたコンクリート版４とによって構成される。この合成床版１の端部には、側鋼板７が連結され、側鋼板７の内面側に壁高欄８が形成されている。
A first embodiment of the present invention will be described below with reference to FIGS.
In the present embodiment, a description will be mainly given of a reinforcing bar arrangement spacer 20 used for an elevated road B constituted by a composite floor slab 1 supported by a main girder 2 extending in the front-rear direction.
As shown in FIGS. 1 and 2, the composite floor slab 1 is composed of a bottom steel plate 3 and a concrete slab 4 on which reinforcing bars composed of a main reinforcing bar R1 and a reinforcing bar R2 are arranged. A side steel plate 7 is connected to an end portion of the composite floor slab 1, and a wall height column 8 is formed on the inner surface side of the side steel plate 7.
まず、底鋼板３について説明する。以下、主に左側部分の構成について説明する。
図１，図２に示すように、底鋼板３は、主桁２の上側フランジ２ａに支持されている。複数の底鋼板３は、ハンチ部１０と、このハンチ部１０の左端から左側へ連なる略矩形状の本体部１１とを備え、前後方向へ直列状に並設されている。
ハンチ部１０は、主桁２から離隔する程高さ位置が高くなるように傾斜状に形成され、略水平状に延びる主桁側端部１０ａが弾性変形可能なゴム製マウント１４を介して主桁２の上側フランジ２ａに支持されている。
First, the bottom steel plate 3 will be described. Hereinafter, the configuration of the left part will be mainly described.
As shown in FIGS. 1 and 2, the bottom steel plate 3 is supported by the upper flange 2 a of the main beam 2. The plurality of bottom steel plates 3 include a haunch portion 10 and a substantially rectangular main body portion 11 extending from the left end of the haunch portion 10 to the left side, and are arranged in series in the front-rear direction.
The haunch portion 10 is formed in an inclined shape so that the height position becomes higher as the distance from the main girder 2 increases, and the main girder side end portion 10a extending substantially horizontally extends through a rubber mount 14 that is elastically deformable. The upper flange 2a of the beam 2 is supported.
本体部１１は、本体部１１の上面に接合され且つ左右両側鋼板７間に亙って左右方向へ直線状に延びる複数の横リブ１２と、本体部１１の上面に立設された複数の頭付スタッド１３と、前後に隣り合う底鋼板３を連結するための鋼製の添接板９等が設けられている。
複数の横リブ１２は、前後方向おいて適当間隔おきに設置されている。添接板９は隣り合う底鋼板３の当接部上面を覆うように夫々の底鋼板３に接合されている。これら横リブ１２のハンチ部１０に対応する部分には、断面略Ｌ字状のアングル１５と板状の補強部材（図示略）が横リブ１２を間に介して夫々連結されている。
The main body part 11 is joined to the upper surface of the main body part 11 and extends between the left and right steel plates 7 in a straight line in the left-right direction, and a plurality of heads erected on the upper surface of the main body part 11. A steel attachment plate 9 and the like for connecting the attached stud 13 and the bottom steel plates 3 adjacent to each other are provided.
The plurality of lateral ribs 12 are installed at appropriate intervals in the front-rear direction. The contact plates 9 are joined to the respective bottom steel plates 3 so as to cover the upper surfaces of the contact portions of the adjacent bottom steel plates 3. An angle 15 having a substantially L-shaped cross section and a plate-like reinforcing member (not shown) are connected to portions of the lateral ribs 12 corresponding to the haunch portions 10 with the lateral ribs 12 interposed therebetween.
次に、コンクリート版４について説明する。
図１，図２示すように、コンクリート版４の内部には、左右方向に直線状に延びる複数の主筋Ｒ１と、前後方向に直線状に延びる複数の配力筋Ｒ２と、これら配力筋Ｒ２を支持する複数の鉄筋配筋用スペーサ２０，２１（以下、スペーサ２０，２１という）が設けられ、コンクリート版４の上面には、このコンクリート版４を覆う防水層５と、この防水層５の上面を覆うアスファルト舗装６が配設されている。
Next, the concrete plate 4 will be described.
As shown in FIGS. 1 and 2, in the concrete plate 4, a plurality of main reinforcing bars R1 extending linearly in the left-right direction, a plurality of reinforcing bars R2 extending linearly in the front-rear direction, and these distributing bars R2 A plurality of reinforcing bar reinforcing spacers 20, 21 (hereinafter referred to as spacers 20, 21) are provided, and a waterproof layer 5 covering the concrete plate 4 is formed on the top surface of the concrete plate 4. An asphalt pavement 6 covering the upper surface is disposed.
複数の主筋Ｒ１は、複数の横リブ１２の直上方位置において、複数の配力筋Ｒ２上に載置されると共にその載置部分で主筋Ｒ１と配力筋Ｒ２が一体的に結束されている。
複数の配力筋Ｒ２は、複数のスペーサ２０，２１上に載置されている。
複数のスペーサ２０，２１は、所定の密度、例えば１ｍ２当たり４個以上配設されるように複数の横リブ１２に夫々装着されている。
The plurality of main muscles R1 are placed on the plurality of power distribution muscles R2 at positions immediately above the plurality of lateral ribs 12, and the main muscles R1 and the power distribution muscles R2 are integrally bound at the placement portion. .
The plurality of force distribution bars R2 are placed on the plurality of spacers 20 and 21.
The plurality of spacers 20 and 21 are respectively attached to the plurality of lateral ribs 12 so as to be arranged at a predetermined density, for example, 4 or more per 1 m 2 .
次に、複数のスペーサ２０，２１について説明する。
図２に示すように、複数の横リブ１２のハンチ部１０に対応する部分には、複数のスペーサ２１が装着され、複数の横リブ１２のハンチ部１０に対応する部分以外の部分には、複数のスペーサ２０が装着されている。複数のスペーサ２１は、複数のスペーサ２０と略同様の構成であるため、以下、主にスペーサ２０について説明する。
Next, the plurality of spacers 20 and 21 will be described.
As shown in FIG. 2, a plurality of spacers 21 are attached to portions corresponding to the haunch portions 10 of the plurality of lateral ribs 12, and portions other than the portions corresponding to the haunch portions 10 of the plurality of lateral ribs 12 are A plurality of spacers 20 are mounted. Since the plurality of spacers 21 have substantially the same configuration as the plurality of spacers 20, the spacer 20 will be mainly described below.
これら複数のスペーサ２０は、所定長を有する合成樹脂繊維、例えばポリプロピレン繊維で補強されたセメント押出材を加工して形成された軽量且つ高強度の成形品である。
表１に示すように、スペーサ２０の原材料の成分配合は、セメントや珪石粉末等のモルタルコククリート材料に対し、ポリプロピレン繊維を含む繊維補強材が重量比で約８．８％の割合を占めている。
As shown in Table 1, the component composition of the raw material of the spacer 20 is such that the fiber reinforcing material including polypropylene fibers accounts for about 8.8% by weight with respect to the mortar cockleet material such as cement and silica stone powder. Yes.
図３，図４に示すように、スペーサ２０は、横リブ１２に係合可能な係合部２０ａと、配力筋Ｒ２を位置決め状態で載置可能な載置部２０ｂとによって一体的に構成されている。
係合部２０ａは、スペーサ２０の下半部に設けられ、鉛直下方へ平行状に延びる１対の脚部２０ｃと、これら１対の脚部２０ａの間を水平状に連結する当接部２０ｄとを備えている。
As shown in FIGS. 3 and 4, the spacer 20 is integrally formed by an engaging portion 20 a that can be engaged with the lateral rib 12 and a placement portion 20 b that can place the distribution force R <b> 2 in a positioned state. Has been.
The engaging portion 20a is provided in the lower half portion of the spacer 20, and a pair of leg portions 20c extending in a vertically downward parallel manner, and a contact portion 20d for horizontally connecting the pair of leg portions 20a. And.
１対の脚部２０ｃは、各々が対向配置され、それらの離隔距離は横リブ１２の前後長（厚さ）と略同じ寸法に形成されている。それ故、１対の脚部２０ｃが横リブ１２の前後両側面を挟持するように横リブ１２に上方から係合することができ、これら１対の脚部２０ｃが横リブ１２の前後両側面を挟持したとき、スペーサ２０の前後方向の移動が規制される。
当接部２０ｄは、載置部２０ｂの下端部の一部分に相当し、横リブ１２の上面に面接触可能な平坦状に形成されている。それ故、横リブ１２の上面を基準としてスペーサ２０の高さ位置を精度良く位置決めでき、当接部２０ｄと横リブ１２の上面との摩擦力によってスペーサ２０の左右方向への位置移動を規制する摩擦力が発生している。
Each of the pair of leg portions 20c is disposed so as to face each other, and the distance between them is substantially the same as the longitudinal length (thickness) of the lateral rib 12. Therefore, the pair of leg portions 20c can be engaged with the lateral rib 12 from above so as to sandwich the front and rear side surfaces of the lateral rib 12, and the pair of leg portions 20c are disposed on the front and rear side surfaces of the lateral rib 12. When the spacer 20 is sandwiched, the movement of the spacer 20 in the front-rear direction is restricted.
The abutting portion 20 d corresponds to a part of the lower end portion of the placement portion 20 b and is formed in a flat shape that can be brought into surface contact with the upper surface of the lateral rib 12. Therefore, the height position of the spacer 20 can be accurately positioned with reference to the upper surface of the lateral rib 12, and the position movement of the spacer 20 in the left-right direction is regulated by the frictional force between the contact portion 20d and the upper surface of the lateral rib 12. Frictional force is generated.
スペーサ２０の材料成分中にポリプロピレン繊維が含有されているため、脚部２０ｃの基端部分、所謂係合部２０ａと載置部２０ｂとの境界部分の強度が増加されていることから、脚部２０ｃを薄肉化でき、スペーサ２０の小型化が図られている。
本実施例では、脚部２０ｃの前後長が、当接部２０ｄの前後長の半分以下に設定されている。
Since the polypropylene fiber is contained in the material component of the spacer 20, the strength of the base end portion of the leg portion 20c, that is, the boundary portion between the so-called engagement portion 20a and the placement portion 20b is increased. 20c can be thinned and the spacer 20 is miniaturized.
In the present embodiment, the longitudinal length of the leg portion 20c is set to be equal to or less than half the longitudinal length of the contact portion 20d.
図３，図４に示すように、載置部２０ｂは、係合部２０ａに連なってスペーサ２０の上半部に設けられ、上方に開放し且つ配力筋Ｒ２よりも若干大きな半径の部分円弧状凹部２０ｅを備えている。この載置部２０ｂは、側面視にて台形状に形成され、その上端部の前後長は当接部２０ｄの前後長よりも小さく形成されている。これにより、配力筋Ｒ２が凹部２０ｅに載置されたとき、凹部２０ｅによって配力筋Ｒ２の左右方向への位置移動が規制される。 As shown in FIGS. 3 and 4, the mounting portion 20 b is provided in the upper half of the spacer 20 in a row with the engaging portion 20 a, opens upward, and has a slightly larger radius than the distribution bar R <b> 2. An arc-shaped recess 20e is provided. The mounting portion 20b is formed in a trapezoidal shape in a side view, and the front and rear length of the upper end portion is formed smaller than the front and rear length of the contact portion 20d. Thereby, when the reinforcing bar R2 is placed in the recess 20e, the recess 20e restricts the position movement of the distributing bar R2 in the left-right direction.
複数のスペーサ２１は、スペーサ２０と同様に形成され、横リブ１２に係合可能な係合部と、配力筋Ｒ２を位置決め状態で載置可能な載置部とによって一体的に夫々構成されている。スペーサ２１の１対の脚部の離隔距離は、スペーサ２０の１対の脚部２０ｃの離隔距離よりも大きく形成され、横リブ１２とアングル１５と補強部材との前後長の和と同じ長さに設定されている。 The plurality of spacers 21 are formed in the same manner as the spacer 20, and are integrally formed by an engaging portion that can engage with the lateral rib 12 and a placement portion on which the distribution bar R <b> 2 can be placed in a positioned state. ing. The separation distance between the pair of leg portions of the spacer 21 is larger than the separation distance between the pair of leg portions 20c of the spacer 20, and is the same length as the sum of the longitudinal lengths of the lateral rib 12, the angle 15 and the reinforcing member. Is set to
次に、本考案に係る鉄筋配筋用スペーサ２０の作用及び効果について説明する。
本考案によれば、係合部２０ａが横リブ１２の両側面を挟持することにより、係合部２０ａの前後方向への移動を規制でき、また、載置部２０ｂが前後に延びる配力筋Ｒ２を位置決め状態に載置することにより、配力筋Ｒ２を精度良く位置決めすることができる。
しかも、係合部２０ａと載置部２０ｂとを繊維強化材を含むモルタルコンクリート材料で一体的に形成したため、重量増加を伴うことなく係合部２０ａと載置部２０ｂとの境界部分を強化することができる。
Next, the operation and effect of the reinforcing bar spacer 20 according to the present invention will be described.
According to the present invention, the engaging portion 20a sandwiches both side surfaces of the lateral rib 12, whereby the movement of the engaging portion 20a in the front-rear direction can be restricted, and the placement portion 20b extends in the front-rear direction. By placing R2 in the positioning state, the distribution bar R2 can be accurately positioned.
Moreover, since the engaging portion 20a and the placement portion 20b are integrally formed of a mortar concrete material including a fiber reinforcement, the boundary portion between the engagement portion 20a and the placement portion 20b is reinforced without increasing the weight. be able to.
係合部２０ａが横リブ１２の上面に面接触可能な当接部２０ｄを備えたため、スペーサ２０の位置移動を摩擦力によって規制することができ、配力筋Ｒ２の高さ位置を精度良く位置決めすることができる。
繊維強化材がポリプロピレン繊維であるため、簡単な構成で、係合部２０ａと載置部２０ｂとの境界部分を強化することができる。
Since the engaging portion 20a includes the abutting portion 20d that can come into surface contact with the upper surface of the lateral rib 12, the position movement of the spacer 20 can be regulated by the frictional force, and the height position of the distribution bar R2 can be accurately positioned. can do.
Since the fiber reinforcing material is polypropylene fiber, the boundary portion between the engaging portion 20a and the placing portion 20b can be reinforced with a simple configuration.
次に、前記実施例を部分的に変更した変更例について説明する。
［１］前記実施例では、スペーサ２０をポリプロピレン繊維を含むモルタルコンクリート材料で成形した例を説明したが、少なくとも強度を強化可能な繊維であれば良く、他の合成樹脂繊維でも良い、また、所定長を有する炭素繊維やガラス繊維を用いることも可能である。
Next, a modified example in which the above embodiment is partially modified will be described.
[1] In the above-described embodiment, an example in which the spacer 20 is formed of a mortar concrete material including polypropylene fibers has been described. It is also possible to use carbon fibers or glass fibers having a long length.
［２］前記実施例では、合成床版１の横リブ１２に装着したスペーサ２０の例を説明したが、一般の鉄筋コンクリート構造物に適用しても良い。また、全幅に亙って延びる横リブ１２に限ることなく、少なくとも前後又は左右方向の壁面を備えたリブ部材を備えた鉄筋コンクリート構造物であれば適用可能である。 [2] In the above embodiment, the example of the spacer 20 mounted on the lateral rib 12 of the composite floor slab 1 has been described. However, the spacer 20 may be applied to a general reinforced concrete structure. Further, the present invention is not limited to the lateral ribs 12 extending over the entire width, and can be applied to any reinforced concrete structure including a rib member having at least front and rear or left and right wall surfaces.
［３］前記実施例では、橋軸方向に延びる配力筋Ｒ２を支持するスペーサ２０の例を説明したが、橋軸直交方向に延びる主筋Ｒ１を支持するスペーサとして用いても良い。この場合、凹部の方向を橋軸直交方向に形成する。また、主筋Ｒ１と配力筋Ｒ２の双方を夫々支持するスペーサとして用いることも可能である。 [3] In the above embodiment, the example of the spacer 20 that supports the distribution bar R2 extending in the bridge axis direction has been described. However, the spacer 20 may be used as a spacer for supporting the main bar R1 extending in the bridge axis orthogonal direction. In this case, the direction of the recess is formed in the direction perpendicular to the bridge axis. Moreover, it is also possible to use it as a spacer that supports both the main reinforcement R1 and the distribution reinforcement R2.
［４］その他、当業者であれば、本考案の趣旨を逸脱することなく、前記実施例に種々の変更を付加した形態で実施可能で、本考案はそのような変更形態も包含するものである。 [4] In addition, those skilled in the art can implement the present invention by adding various modifications without departing from the spirit of the present invention, and the present invention includes such modifications. is there.
１ 合成床版
１２ 横リブ
２０，２１ スペーサ
２０ａ 係合部
２０ｂ 載置部
２０ｄ 当接部
Ｒ２ 配力筋
DESCRIPTION OF SYMBOLS 1 Composite floor slab 12 Horizontal rib 20, 21 Spacer 20a Engagement part 20b Placement part 20d Contact part R2 Power distribution reinforcement
Claims (3)
前記床版上に橋軸直交方向に向けて固定された横リブの両側面を挟持するように横リブに上方から係合されて橋軸方向の移動を規制する係合部と、
前記橋軸方向に延びる鉄筋を位置決め状態に載置可能な載置部とを有し、
前記係合部と載置部とを繊維強化材を含むモルタルコンクリート材料で一体的に形成したことを特徴とする鉄筋配筋用スペーサ。 In the reinforcing bar reinforcing spacer to define the height position of the reinforcing bar placed on the floor slab,
An engaging portion that is engaged with the lateral rib from above so as to sandwich both side surfaces of the lateral rib fixed on the floor slab in the direction orthogonal to the bridge axis, and restricts movement in the bridge axis direction;
A mounting portion capable of mounting the reinforcing bars extending in the bridge axis direction in a positioning state;
A reinforcing bar reinforcing spacer, wherein the engaging portion and the placing portion are integrally formed of a mortar concrete material including a fiber reinforcing material.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20230125633A (en) * | 2022-02-21 | 2023-08-29 | 서울시립대학교 산학협력단 | Rebar clamping device for box-type cft column |
| JP7453837B2 (en) | 2020-04-09 | 2024-03-21 | 清水建設株式会社 | Reinforcement structure and reinforcement construction method for concrete structures |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7453837B2 (en) | 2020-04-09 | 2024-03-21 | 清水建設株式会社 | Reinforcement structure and reinforcement construction method for concrete structures |
| KR20230125633A (en) * | 2022-02-21 | 2023-08-29 | 서울시립대학교 산학협력단 | Rebar clamping device for box-type cft column |
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