JP5039490B2 - Method and apparatus for post-installation of water-stopping material - Google Patents

Method and apparatus for post-installation of water-stopping material Download PDF

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JP5039490B2
JP5039490B2 JP2007250791A JP2007250791A JP5039490B2 JP 5039490 B2 JP5039490 B2 JP 5039490B2 JP 2007250791 A JP2007250791 A JP 2007250791A JP 2007250791 A JP2007250791 A JP 2007250791A JP 5039490 B2 JP5039490 B2 JP 5039490B2
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water
main girder
stopping material
floor slab
precast floor
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JP2009079445A (en
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伸久 小林
裕 師山
幸宏 倉田
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IHI Infrastructure Systems Co Ltd
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Description

本発明は、橋梁架設工事時に主桁の上側にプレキャスト床版を載置した後、該主桁とプレキャスト床版との間にコンクリート充填用の止水材を施工するために用いる止水材の後入れ施工方法及び装置に関するものである。   The present invention provides a water-stopping material used for constructing a water-stopping material for filling concrete between the main girder and the precast floor slab after placing a precast floor slab on the upper side of the main girder during bridge construction work. The present invention relates to a post-installation construction method and apparatus.

近年、橋梁の床版の施工方法の1つとして、プレキャスト床版を用いた工法が多く用いられるようになってきている。   In recent years, a construction method using a precast floor slab has been frequently used as one method for constructing a bridge slab.

この種のプレキャスト床版を用いた橋梁の架設方法を実施する場合は、図6に示す如く、橋脚1上に、橋軸方向に延びる主桁(橋桁)2を幅員方向に所要間隔を隔てて複数設置する。次に、該各主桁2の上面の幅方向両端縁部に、止水材(橋桁用シール材)3を、各主桁2の長手方向、すなわち、橋軸方向に延びるよう貼り付ける。次いで、上記幅員方向に配列されている各主桁2の上側に、該各主桁2を跨いで幅員方向に延びるプレキャスト床版4を、上記止水材3の上方から載置した後、各主桁2の上面と上方のプレキャスト床版4との間で圧縮された上記各主桁2の幅方向両端縁部の止水材3同士の間に、コンクリート5を充填するよう打設することで、上記プレキャスト床版4を主桁2に固定するようにしてある。   When carrying out a bridge erection method using this type of precast floor slab, as shown in FIG. 6, a main girder (bridge girder) 2 extending in the bridge axis direction is spaced apart in the width direction on the pier 1 at a necessary interval. Install several. Next, a water stop material (bridge girder seal material) 3 is attached to both edge portions in the width direction of the upper surface of each main girder 2 so as to extend in the longitudinal direction of each main girder 2, that is, in the bridge axis direction. Next, on the upper side of each main girder 2 arranged in the width direction, after placing the precast floor slab 4 extending across the main girder 2 in the width direction from above the waterstop 3, Placing concrete 5 between the water stop materials 3 at both ends in the width direction of each main girder 2 compressed between the upper surface of the main girder 2 and the upper precast floor slab 4 Thus, the precast floor slab 4 is fixed to the main beam 2.

そのために、上記止水材3は、上記主桁2の上面と、その上に載置されるプレキャスト床版4との間で圧縮されることで、コンクリート充填時の形枠代わりとなり、上記主桁2とプレキャスト床版4との間に充填するコンクリート5が硬化して強度を発揮するまでの間、主桁2とプレキャスト床版4との間からコンクリート5が垂れない(漏れない)ようにするための止水性が求められる。   For this purpose, the water-stopping material 3 is compressed between the upper surface of the main girder 2 and the precast floor slab 4 placed on the main girder 2, thereby replacing the main frame when filling concrete. Until the concrete 5 filled between the girder 2 and the precast floor slab 4 is hardened and exerts its strength, the concrete 5 does not drip (not leak) between the main girder 2 and the precast floor slab 4. Water-stopping performance is required.

上記止水材3としては、独立気泡型のポリエチレン発泡体やゴムスポンジ等からなる独立気泡型の発泡体を、長尺の角棒状に形成したものが従来用いられている。又、連続気泡が多く含まれる発泡体の層と独立気泡型の発泡体の層とを2層又は3層に積層してなる形式の矩形断面の止水材3(たとえば、特許文献1参照)や、連続気泡型の発泡体により略半楕円形断面とした止水材3(たとえば、特許文献2参照)も提案されてきている。   As the water-stopping material 3, a material in which a closed-cell type foam made of a closed-cell type polyethylene foam or rubber sponge is formed into a long square bar shape has been conventionally used. Further, a water blocking material 3 having a rectangular cross section in which a foam layer containing many open cells and a closed cell foam layer are laminated in two or three layers (see, for example, Patent Document 1) In addition, a water-stopping material 3 (see, for example, Patent Document 2) having a substantially semi-elliptical cross section by an open-cell foam has been proposed.

特開2003−155708号公報JP 2003-155708 A 特開2003−155709号公報JP 2003-155709 A

ところが、従来は、各主桁2の上面に止水材3を施工してから、該各主桁2の上側にプレキャスト床版4を載置し、その後、各主桁2の上面と、プレキャスト床版4と、上記各主桁2の幅方向両端縁部にて圧縮された止水材3同士の間の空間に、コンクリート5を充填するようにしてあることから、上記止水材3の施工からコンクリート5の打設までの期間が長く、そのため、この期間中に上記プレキャスト床版4が温度変化等によって橋梁の幅員方向に、すなわち、上記主桁2の長手方向と直角な方向に伸縮すると、上記したように上面側がプレキャスト床版4の下面に密着するようにしてある上記止水材3が、主桁2の上面における当初の貼り付け位置よりずれて剥がれる事例が発生しているというのが実状である。   However, conventionally, after the waterproof material 3 is constructed on the upper surface of each main girder 2, the precast floor slab 4 is placed on the upper side of each main girder 2, and then the upper surface of each main girder 2 and the precast Since the concrete 5 is filled in the space between the floor slab 4 and the water stop materials 3 compressed at both edges in the width direction of the main girders 2, The period from construction to placing of concrete 5 is long, so during this period the precast floor slab 4 expands and contracts in the width direction of the bridge, that is, in a direction perpendicular to the longitudinal direction of the main girder 2 due to temperature changes, etc. Then, as described above, there is an example in which the water blocking material 3 whose upper surface side is in close contact with the lower surface of the precast floor slab 4 is deviated from the initial attachment position on the upper surface of the main girder 2 and peeled off. This is the actual situation.

そのために、上記止水材3がずれて剥がれた個所では、該個所からのコンクリート5の漏れを防止するために、コンクリート5の打設作業前にずれた止水材3の補修作業が必要になるため、この補修作業に手間及び時間を要してしまう。   Therefore, in the place where the water-stopping material 3 is displaced and peeled off, in order to prevent the leakage of the concrete 5 from the place, it is necessary to repair the water-stopping material 3 that has shifted before the concrete 5 is placed. Therefore, this repair work takes time and effort.

又、近年では、主桁2の上側にプレキャスト床版4を載置した後、既設構造物やプレキャスト床版4の据付高さの出来形調整のために、上記主桁2上にてプレキャスト床版4の高さを上下方向に数十ミリメートル変えることができる構造とすることが望まれてきている。しかし、上記従来の止水材3は、いずれも主桁2の上に貼り付けた状態で、プレキャスト床版4を上方から載置して所要寸法まで圧縮することによって、コンクリート充填時の形枠代わりとなる強度と、漏れ防止性能を発揮できるようにしたものであることから、主桁2の上方にてプレキャスト床版4の高さを変えると、圧縮不足が生じて当初設定されていたコンクリート充填時の型枠としての強度を十分に発揮できなくなる虞が生じてしまう。   In recent years, after the precast floor slab 4 is placed on the upper side of the main girder 2, the precast floor is placed on the main girder 2 in order to adjust the finished height of the existing structure or the precast floor slab 4. It has been desired to have a structure in which the height of the plate 4 can be changed by several tens of millimeters in the vertical direction. However, the above-mentioned conventional water-stopping material 3 is affixed on the main girder 2, and the precast floor slab 4 is placed from above and compressed to the required dimensions, thereby forming the formwork when filling concrete. Because it is designed to demonstrate alternative strength and leakage prevention performance, changing the height of the precast slab 4 above the main girder 2 will result in insufficient compression and initially set concrete There is a possibility that the strength as a mold at the time of filling cannot be sufficiently exhibited.

そこで、本発明は、主桁上にプレキャスト床版を載置してから該プレキャスト床版を主桁に固定するためのコンクリート打設作業までの期間が長く、その期間中に上記のように主桁と、その上に載置したプレキャスト床版に温度変化等によって挙動差が生じても、止水材にずれや剥がれが生じる虞を防止でき、更に、主桁の上方にてプレキャスト床版の高さを変える工法にも容易に対応できる止水材の後入れ施工方法及び装置を提供しようとするものである。   Therefore, the present invention has a long period from placing the precast floor slab on the main girder until the concrete placing work for fixing the precast floor slab to the main girder. Even if there is a difference in behavior due to temperature changes, etc., between the girder and the precast slab placed on it, it is possible to prevent the water-stopping material from shifting or peeling off. It is an object of the present invention to provide a post-installation construction method and device for a water-stopping material that can easily cope with a method of changing the height.

本発明は、上記課題を解決するために、請求項1に対応して、主桁の上側に、裾付高さ可変式固定金具を介してプレキャスト床版を載置して、該裾付高さ可変式固定金具で支持されるプレキャスト床版と上記主桁との間に隙間を設け、次に、上記主桁とプレキャスト床版との隙間に、止水材を挿入して上記主桁の上面の幅方向両端縁部にそれぞれ配置し、しかる後、上記止水材を、上記裾付高さ可変式固定金具によって変化させられる隙間の寸法に追従させて膨張させて上記主桁の上面とプレキャスト床版の下面に密着させるようにする止水材の後入れ施工方法とする。 The present invention, in order to solve the above problems, in correspondence to claim 1, the upper side of the main girder, and location mounting the precast slab through Susozuke height adjustable fixing bracket, net with該裾A gap is provided between the precast floor slab supported by the variable fixing bracket and the main girder, and then a water stop material is inserted into the gap between the main girder and the precast floor slab. It arrange | positions to the width direction both ends edge part of an upper surface, respectively, Then, the said water stop material is made to expand according to the dimension of the clearance gap changed with the said skirt height-variable fixing bracket, and the upper surface of the said main girder. It is a post-installation method for water-stopping material that is in close contact with the lower surface of the precast floor slab.

又、上記構成における止水材として、弾性を有し且つ断面形状の外形が丸形の止水材を用いるようにして、該止水材を、主桁とプレキャスト床版との隙間に、圧縮しながら転がすようにして挿入した後、該圧縮状態の止水材が初期形状に復元するよう膨張することで、上記主桁の上面とプレキャスト床版の下面に密着するようにする。   Further, as the water-stopping material in the above configuration, a water-stopping material having elasticity and having a round cross-sectional outer shape is used, and the water-stopping material is compressed in the gap between the main girder and the precast floor slab. After being inserted while rolling, the water-stopping material in a compressed state is expanded so as to be restored to the initial shape, thereby closely contacting the upper surface of the main girder and the lower surface of the precast slab.

同様に、上記構成における止水材として、直線状に延び且つ両端部の閉塞されたチューブ体の所要個所に空気注入バルブを設けてなる止水材を用いて、該止水材を、主桁とプレキャスト床版との隙間に空気を抜いた状態で挿入した後、上記チューブ体に空気を注入することで、該止水材を上記主桁の上面とプレキャスト床版の下面に密着させるようにする。   Similarly, as the water-stopping material in the above configuration, using a water-stopping material that is provided with an air injection valve at a required portion of a tube body that extends linearly and is closed at both ends, the water-stopping material is used as the main girder. So that the water-stopping material is in intimate contact with the upper surface of the main girder and the lower surface of the precast floor slab To do.

又、請求項4に対応して、主桁と該主桁の上側に隙間を隔てて載置するプレキャスト床版を支持して上記隙間の寸法を自在に調整することができる据付高さ可変式固定金具と、上記主桁とプレキャスト床版との隙間に配置し、上記裾付高さ可変式固定金具によって変化させられる隙間の寸法に追従させて上記主桁の上面とプレキャスト床版の下面に密着させることができるように膨張させることができるようにしてある止水材とを備えてなる構成を有する止水材の後入れ施工装置とする。 Further, in accordance with claim 4, the installation height variable type capable of freely adjusting the size of the gap by supporting the main girder and the precast floor slab placed on the upper side of the main girder with a gap. Placed in the gap between the fixing bracket and the main girder and the precast floor slab, and follows the size of the gap changed by the hem height adjustable fixing bracket on the upper surface of the main girder and the lower surface of the precast floor slab a water stopping material that is to be able to expand so as to be able to adhere to the last-construction unit waterproof material having provided comprising configure.

更に、上記構成における止水材を、弾性を有し且つ断面形状の外形が丸形の止水材とした構成とする。   Further, the water-stopping material in the above configuration is configured to be a water-stopping material having elasticity and having a round cross-sectional outer shape.

同様に、上記構成における止水材を、直線状に延び且つ両端部の閉塞されたチューブ体の所要個所に空気注入バルブを設けてなる止水材とした構成とする。   Similarly, the water-stopping material in the above configuration is configured as a water-stopping material that is provided with an air injection valve at a required portion of a tube body that extends linearly and is closed at both ends.

本発明によれば、以下のような優れた効果を発揮する。
(1)主桁の上側に、裾付高さ可変式固定金具を介してプレキャスト床版を載置して、該裾付高さ可変式固定金具で支持されるプレキャスト床版と上記主桁との間に隙間を設け、次に、上記主桁とプレキャスト床版との隙間に、止水材を挿入して上記主桁の上面の幅方向両端縁部にそれぞれ配置し、しかる後、上記止水材を、上記裾付高さ可変式固定金具によって変化させられる隙間の寸法に追従させて膨張させて上記主桁の上面とプレキャスト床版の下面に密着させるようにする止水材の後入れ施工方法及び装置としてあるので、主桁の上側にプレキャスト床版を載置した後、温度変化等による伸縮によって上記主桁とプレキャスト床版に挙動差が生じるとしても、該主桁とプレキャスト床版の隙間に止水材を挿入配置する前であれば、止水材に影響することはない。したがって、上記主桁とプレキャスト床版との間への止水材の施工を、該主桁とプレキャスト床版との間へのコンクリートの打設作業の直前に行うようにすることで、上記主桁とプレキャスト床版の挙動差が、上記止水材にずれや剥がれ等の悪影響を及ぼす虞を解消することができる。
(2)上記止水材は、主桁とプレキャスト床版との隙間に配置した状態で膨張させることで上記主桁の上面とプレキャスト床版の下面に密着させるようにしてあることから、鋼構造やコンクリート構造の表面の不陸に良好に追従させることができて、高い止水効果を得ることができる。
(3)止水材として、弾性を有し且つ断面形状の外形が丸形の止水材を用いるようにして、該止水材を、主桁とプレキャスト床版との隙間に、圧縮しながら転がすようにして挿入した後、該圧縮状態の止水材が初期形状に復元するよう膨張することで、上記主桁の上面とプレキャスト床版の下面に密着するようにする構成とすることにより、上記止水材の主桁とプレキャスト床版との隙間への挿入作業を容易なものとすることが可能になる。しかも、上記止水材は、断面形状の外形が円形としてあるため、多少のねじれが生じても上下方向の高さ寸法を長手方向の全長に亘りほぼ一定とすることができる。よって、上記主桁とプレキャスト床版との隙間へ挿入する際に多少ねじれても、該主桁とプレキャスト床版との隙間に挿入配置されることによって上下方向より圧縮された状態となる上記止水材の圧縮度を、長手方向に均等なものとすることができる。
(4)止水材として、直線状に延び且つ両端部の閉塞されたチューブ体の所要個所に空気注入バルブを設けてなる止水材を用いて、該止水材を、主桁とプレキャスト床版との隙間に空気を抜いた状態で挿入した後、上記チューブ体に空気を注入することで、該止水材を上記主桁の上面とプレキャスト床版の下面に密着させるようにする構成とすることにより、上記止水材は、単に空気を抜いて扁平な状態としておくことで、上記主桁とプレキャスト床版との隙間に容易に挿入することができて、該止水材を上記主桁とプレキャスト床版との隙間における所定個所に配設するための作業に要する労力を更に軽減させることが可能になる。
According to the present invention, the following excellent effects are exhibited.
(1) on the upper side of the main girder, and location mounting the precast slab through Susozuke height adjustable mounting brackets, precast floor slab supported at the height adjustable mounting brackets with該裾and the said main girder a gap is provided between, then, the gap between the main beam and the precast slab, by inserting a water stopping material is arranged in the both widthwise end edges of the upper surface of the main beam, after which the stop Introducing water-stopping material that causes the water material to inflate following the size of the gap that is changed by the hem height-variable fixing bracket and to adhere to the upper surface of the main girder and the lower surface of the precast floor slab Since there is a construction method and apparatus, even if a difference in behavior occurs between the main girder and the precast floor slab due to expansion and contraction due to temperature change after placing the precast floor slab on the upper side of the main girder, the main girder and the precast floor slab If it is before inserting the water stop material in the gap, It does not affect the wood. Therefore, the construction of the water stop material between the main girder and the precast slab is performed immediately before the concrete is placed between the main girder and the precast slab. The difference in behavior between the girders and the precast slab can eliminate the possibility of adverse effects such as displacement and peeling on the water-stopping material.
(2) Since the water-stopping material is in contact with the upper surface of the main girder and the lower surface of the precast slab by being expanded in a state of being arranged in the gap between the main girder and the precast slab, the steel structure In addition, it can follow the unevenness of the surface of the concrete structure well, and a high water stop effect can be obtained.
(3) While using a water-stopping material having elasticity and a round cross-sectional outer shape as the water-stopping material, compressing the water-stopping material into the gap between the main girder and the precast slab After being inserted in a rolling manner, the compressed water-stopping material is expanded so as to be restored to its initial shape, thereby being in close contact with the upper surface of the main girder and the lower surface of the precast slab, It becomes possible to facilitate the operation of inserting the water stop material into the gap between the main beam and the precast floor slab. In addition, since the outer shape of the cross-sectional shape of the water-stopping material is circular, the height dimension in the vertical direction can be made substantially constant over the entire length in the longitudinal direction even if some twisting occurs. Therefore, even if the main girder and the precast floor slab are inserted into the gap between the main girder and the precast floor slab, they are inserted into the gap between the main girder and the precast floor slab so as to be compressed from above and below. The compressibility of the water material can be made uniform in the longitudinal direction.
(4) As the water-stopping material, using a water-stopping material that is provided with an air injection valve at a required portion of the tube body that extends linearly and is closed at both ends, the water-stopping material is used as the main girder and the precast floor. A structure in which the water-stopping material is brought into close contact with the upper surface of the main girder and the lower surface of the precast floor slab by inserting air into the tube body after being inserted in a state where the air is removed from the space between the plate and the plate. Thus, the water-stopping material can be easily inserted into the gap between the main girder and the precast slab simply by evacuating the air and keeping it flat. It is possible to further reduce the labor required for the work for disposing at a predetermined position in the gap between the beam and the precast slab.

以下、本発明を実施するための最良の形態を図面を参照して説明する。   The best mode for carrying out the present invention will be described below with reference to the drawings.

図1(イ)(ロ)(ハ)及び図2(イ)(ロ)は本発明の止水材の後入れ施工方法及び装置の実施の一形態を示すもので、先ず、主桁2の上側に、据付高さ可変式固定金具6を介してプレキャスト床版4を載置する。次に、上記据付高さ可変式固定金具6でプレキャスト床版4を支持することによって上記主桁2の上面と該プレキャスト床版4の下面との間に設けた隙間7に、後入れ施工用の止水材8を挿入して、該止水材8を上記主桁2の上面における幅方向両端縁部と対応する位置にそれぞれ配置させることで、該各止水材8の下端部を上記主桁2の上面に密着させると共に、各止水材8の上端部をプレキャスト床版4の下面に密着させる。これにより、上記各止水材8に、後の工程で上記主桁2とプレキャスト床版4との間にコンクリート5を充填して打設する際に該コンクリート5の漏れを防止できる止水性を発揮させることができるようにする。   1 (a) (b) (c) and FIG. 2 (b) (b) show an embodiment of the post-installation construction method and device of the water-stopping material of the present invention. On the upper side, the precast floor slab 4 is placed via the installation height variable fixing bracket 6. Next, the precast floor slab 4 is supported by the installation height variable fixing bracket 6, and the gap 7 provided between the upper surface of the main girder 2 and the lower surface of the precast floor slab 4 is used for post-installation work. The water-stopping material 8 is inserted, and the water-stopping material 8 is arranged at positions corresponding to both end edges in the width direction on the upper surface of the main girder 2, so that the lower ends of the water-stopping materials 8 are While making it closely_contact | adhere to the upper surface of the main girder 2, the upper end part of each water-stop material 8 is closely_contact | adhered to the lower surface of the precast floor slab 4. FIG. Thereby, when each water-stopping material 8 is filled with concrete 5 between the main girder 2 and the precast floor slab 4 and placed in a later step, the water-stopper can prevent leakage of the concrete 5. To be able to demonstrate.

ここで、止水材の後入れ施工装置について説明すると、該止水材の後入れ施工装置は、上記主桁2とプレキャスト床版4との間に所要の隙間7を形成させるための上記据付高さ可変式固定金具6と、後入れ施工用の止水材8とを具備してなる構成とする。   Here, the post-installation construction device for the water-stopping material will be described. The post-installation construction device for the water-stopping material is the installation for forming the required gap 7 between the main girder 2 and the precast floor slab 4. It is set as the structure which comprises the height-variable fixing metal fitting 6 and the water stop material 8 for post-installation construction.

具体的には、上記据付高さ可変式固定金具6は、たとえば、図1(イ)(ロ)に示す如く、上記主桁2の上面の幅方向中央部にて、該主桁2の上側に橋軸方向に並べて配置すべきプレキャスト床版4のそれぞれと対応する位置に、上下方向に延び且つ外周面に雄ねじ(図示せず)を刻設してなるスタッド部材9を配置して、該スタッド部材9の下端部を、上記主桁2の上面に溶接等により固定してある。上記スタッド部材9の外周面の雄ねじ部には、高さ調整用ナット10を螺着させて、該高さ調整用ナット10を、上記スタッド部材9の下部に配置させるようにしてある。更に、上下方向の貫通孔12を備えてなるプレキャスト床版連結部材11の上記貫通孔12を、上記高さ調整用ナット10より上方へ突出している上記スタッド部材9の上部の外周に遊嵌させ、該プレキャスト床版連結部材11の上方に突出する上記スタッド部材9の上端部に、固定用ナット13を螺着させた構成としてある。これにより、上記主桁2の上側にプレキャスト床版4を載置するときには、該プレキャスト床版4の形状保持材4aを、主桁2上に設けてある上記据付高さ可変式固定金具6のプレキャスト床版連結部材11に対して橋軸方向(図1(イ)では紙面に対して垂直方向)の片側に接するように配置した後、上記プレキャスト床版連結部材11と、プレキャスト床版4の形状保持材4aとを、両者を貫通するボルト14とナット15により連結して、上記スタッド部材9の下部に取り付けてある高さ調整用ナット10の上側に当接する上記プレキャスト床版連結部材11と一体に、上記プレキャスト床版4を支持させる。更に、上記高さ調整用ナット10の取付位置を上下方向に変えて、該高さ調整用ナット10の上端の高さ位置を変えることで、上記プレキャスト床版4の主桁2上における高さ位置を自在に調整できるようにしてある。上記のようにして主桁2上でのプレキャスト床版4の高さ位置を調整した後は、上記スタッド部材9の上端部に螺着させてある固定用ナット13を、上記プレキャスト床版連結部材11の上端部に接するように締め込むことで、該プレキャスト床版連結部材11の上方への変位を拘束して上記プレキャスト床版4の上下方向位置を固定できるようにしてある。   Specifically, the installation height variable type fixing bracket 6 is formed on the upper side of the main girder 2 at the center in the width direction of the upper surface of the main girder 2, for example, as shown in FIGS. In a position corresponding to each of the precast floor slabs 4 to be arranged side by side in the bridge axis direction, a stud member 9 extending in the vertical direction and having an external thread (not shown) engraved on the outer peripheral surface is disposed, The lower end of the stud member 9 is fixed to the upper surface of the main girder 2 by welding or the like. A height adjusting nut 10 is screwed onto the external thread portion of the outer peripheral surface of the stud member 9, and the height adjusting nut 10 is arranged at the lower portion of the stud member 9. Further, the through hole 12 of the precast floor slab connecting member 11 provided with the through hole 12 in the vertical direction is loosely fitted to the outer periphery of the upper portion of the stud member 9 protruding upward from the height adjusting nut 10. The fixing nut 13 is screwed to the upper end portion of the stud member 9 protruding above the precast slab connecting member 11. Thereby, when the precast floor slab 4 is placed on the upper side of the main girder 2, the shape retaining material 4a of the precast floor slab 4 is fixed to the installation height variable fixing bracket 6 provided on the main girder 2. After placing the precast floor slab connecting member 11 so as to contact one side of the bridge axis direction (perpendicular to the paper surface in FIG. 1 (a)), the precast floor slab connecting member 11 and the precast floor slab 4 The precast floor slab connecting member 11 which is connected to the upper side of the height adjusting nut 10 attached to the lower part of the stud member 9 by connecting the shape holding member 4a with a bolt 14 and a nut 15 penetrating both. The precast floor slab 4 is supported integrally. Further, the height of the precast floor slab 4 on the main girder 2 is changed by changing the mounting position of the height adjusting nut 10 in the vertical direction and changing the height position of the upper end of the height adjusting nut 10. The position can be adjusted freely. After adjusting the height position of the precast floor slab 4 on the main girder 2 as described above, the fixing nut 13 screwed to the upper end of the stud member 9 is attached to the precast floor slab connecting member. 11 is fastened so as to be in contact with the upper end portion of the plate 11 so that the upward displacement of the precast floor slab connecting member 11 is restrained so that the vertical position of the precast floor slab 4 can be fixed.

上記後入れ施工用の止水材8は、たとえば、連続気泡型発泡体のゴムにより、図1(ハ)に示す如く、断面の外形を丸形とし且つ中空の止水材8としてある。又、上記止水材8は、該止水材8を挿入すべき主桁2と、プレキャスト床版4との間の隙間7よりも所要寸法大きな直径を有するものとしてある。これにより、上記止水材8は、その外形を丸形としてあることに起因して、上記主桁2とその上側に据付高さ可変式固定金具6を介して支持するプレキャスト床版4との間の隙間7に、該止水材8を圧縮しながら転がすようにして挿入することができるようにして、挿入作業を容易なものとすることができるようにしてある。更には、上記止水材8は、断面の外形が丸形としてあることで、長手方向に多少のねじれが生じても、長手方向の全長に亘り断面形状の上下方向寸法がほぼ均一に保たれるようにしてあり、よって、上記したように止水材8を主桁2とプレキャスト床版4との隙間7に転がすようにして挿入する際に、該止水材8の長手方向にねじれが多少生じても、主桁2とプレキャスト床版4との隙間7に挿入配置されることによって上下方向より圧縮された状態となる上記止水材8の圧縮度が、長手方向に均等になるようにしてある。よって、該止水材8を、上記主桁2とプレキャスト床版4との隙間7に挿入して主桁2の上面における幅方向両端縁部と対応する位置にそれぞれ配置させると、該各止水材8は、圧縮状態から初期形状まで膨張しようとするときの復元力によって上記主桁2の上面と、プレキャスト床版4の下面にそれぞれ密着させられるようになる。   As shown in FIG. 1C, the water-stopping material 8 for post-installation construction is made of, for example, an open-cell foam rubber, and has a round cross-sectional outer shape and a hollow water-stopping material 8. The water stop material 8 has a diameter larger than that of the gap 7 between the main beam 2 into which the water stop material 8 is to be inserted and the precast floor slab 4. As a result, the water-stopping material 8 has a round outer shape so that the main girder 2 and the precast floor slab 4 supported on the upper side thereof via the installation height-variable fixing bracket 6 are provided. The water-stopping material 8 can be inserted into the gap 7 while being compressed while being rolled, so that the insertion work can be facilitated. Furthermore, the water-stopping material 8 has a round cross-sectional outer shape, so that the vertical dimension of the cross-sectional shape is kept substantially uniform over the entire length in the longitudinal direction even if some twisting occurs in the longitudinal direction. Therefore, when the water-stopping material 8 is inserted into the gap 7 between the main girder 2 and the precast floor slab 4 as described above, twisting is caused in the longitudinal direction of the water-stopping material 8. Even if it occurs to some extent, the degree of compression of the water-stopping material 8 that is compressed in the vertical direction by being inserted into the gap 7 between the main beam 2 and the precast floor slab 4 is made uniform in the longitudinal direction. It is. Therefore, when the water-stopping material 8 is inserted into the gap 7 between the main girder 2 and the precast floor slab 4 and arranged at positions corresponding to both edges in the width direction on the upper surface of the main girder 2, The water material 8 is brought into close contact with the upper surface of the main girder 2 and the lower surface of the precast floor slab 4 due to the restoring force when attempting to expand from the compressed state to the initial shape.

上記のようにして主桁2とプレキャスト床版4の隙間7に挿入配置した上記止水材8は、図示しない両面テープやシール材を用いて上記主桁2の上面及びプレキャスト床版4の下面と固定するようにしてもよい。   The water blocking material 8 inserted and arranged in the gap 7 between the main girder 2 and the precast floor slab 4 as described above is obtained by using a double-sided tape or a sealing material (not shown) and the upper surface of the main girder 2 and the lower surface of the precast floor slab 4. You may make it fix.

なお、従来用いられていた如き矩形断面の止水材では、圧縮しながら転がすことが難しいため、上記主桁2とその上側に据付高さ可変式固定金具6を介して載置したプレキャスト床版4との隙間7に対し、該矩形断面の止水材を後から挿入することは難しい。しかも、上記矩形断面の止水材では、ねじれが生じると、その断面形状の上下方向寸法が長手方向で不均一になるため、この矩形断面の止水材がねじれを生じた状態で上下方向に所定寸法まで圧縮された場合には、その圧縮率が長手方向で不均一になることから、止水性に問題が生じる虞があるのである。しかし、上記断面形状の外形が丸形の止水材8を用いることで、このような不利な点をいずれも解消することが可能となるのである。   In addition, since the water-stopping material having a rectangular cross section as used in the past is difficult to roll while being compressed, the precast floor slab placed on the main girder 2 and the fixed height fixing bracket 6 on the upper side thereof. It is difficult to insert the water-stopping material having the rectangular cross section into the gap 7 with respect to 4 later. In addition, when the water-stopping material having the rectangular cross section is twisted, the vertical dimension of the cross-sectional shape is not uniform in the longitudinal direction, so that the water-stopping material having the rectangular cross-section is twisted in the vertical direction. When compressed to a predetermined size, the compression rate becomes non-uniform in the longitudinal direction, which may cause a problem with water stoppage. However, it is possible to eliminate all such disadvantages by using the water-stopping material 8 having a round cross-sectional outer shape.

なお、図示する便宜上、図1(イ)(ロ)ではコンクリート5の記載は省略してある。   For convenience of illustration, the description of the concrete 5 is omitted in FIGS.

以上の構成としてある止水材の後入れ施工装置を用いてプレキャスト床版を用いた橋梁の架設工事を行う場合は、橋脚1上に橋軸方向に延びる主桁2を幅員方向に所要間隔を隔てて複数設置した後、該各主桁2の上側に、該各主桁2を跨いで幅員方向に延びるプレキャスト床版4を、上記据付高さ可変式固定金具6を介して載置する。   When the bridge construction work using the precast floor slab is carried out by using the post-installation construction device for the water stop material having the above structure, the main girder 2 extending in the bridge axis direction on the pier 1 is provided with a necessary interval in the width direction. After installing a plurality of spaces, the precast floor slab 4 extending in the width direction across the main girders 2 is placed on the upper side of the main girders 2 via the fixed installation height type fixing bracket 6.

次いで、各主桁2の上面とその上方のプレキャスト床版4との間へコンクリート5の打設作業を行う前に、上記主桁2とプレキャスト床版4との間の隙間7における主桁2の幅方向両端縁部と対応する個所に、上記後入れ施工用の止水材8を圧縮しながら挿入して、該止水材8の圧縮状態からの復元力により、該止水材8を上記主桁2の上面と上記プレキャスト床版4の下面にそれぞれ密着させる。   Next, before the concrete 5 is placed between the upper surface of each main girder 2 and the precast floor slab 4 thereabove, the main girder 2 in the gap 7 between the main girder 2 and the precast floor slab 4 is arranged. The water-stopping material 8 for post-installation work is inserted while being compressed at locations corresponding to both edge portions in the width direction of the water-stopping material, and the water-stopping material 8 is attached by a restoring force from the compressed state of the water-stopping material 8. The main girder 2 is brought into close contact with the upper surface of the main girder 2 and the lower surface of the precast floor slab 4.

その後、上記のようにして主桁2の上面とプレキャスト床版4の下面に密着させた止水材8についての水漏れテストを行い、万一、水漏れが生じている場合は、該水漏れ個所について、図1(ハ)に示す如く、上記断面形状の外形を丸形としてある止水材8の下部と、その下方の主桁2の上面との間に形成されている楔状の隙間、及び、上記止水材8の上部と、その上方のプレキャスト床版4の下面との間に形成されている楔状の隙間に、後の工程でコンクリート5を打設する側、すなわち、各主桁2の幅方向中央部側からシーリング材16を充填してシールを行うようにする。   Thereafter, a water leak test is performed on the water stop material 8 adhered to the upper surface of the main beam 2 and the lower surface of the precast floor slab 4 as described above. As shown in FIG. 1 (c), a wedge-shaped gap formed between the lower part of the water-stopping material 8 whose outer shape of the cross-sectional shape is round and the upper surface of the main girder 2 below the part, And the side where concrete 5 is placed in a wedge-shaped gap formed between the upper part of the water-stopping material 8 and the lower surface of the precast floor slab 4 above, that is, each main girder Sealing is performed by filling the sealing material 16 from the center in the width direction 2.

しかる後、上記各主桁2の上面と、プレキャスト床版4の下面と、上記各主桁2の幅方向両端縁部にそれぞれ配置してある止水材8によって囲まれる空間部に、コンクリート5を充填するよう打設する。これにより、上記プレキャスト床版4と主桁2との固定が行われるようになる。   Thereafter, the concrete 5 is placed in the space surrounded by the water stop material 8 arranged at the upper surface of each main girder 2, the lower surface of the precast floor slab 4, and both end edges in the width direction of each main girder 2. To fill. As a result, the precast floor slab 4 and the main beam 2 are fixed.

このように、本発明の止水材の後入れ施工方法及び装置によれば、主桁2の上側にプレキャスト床版4を載置した後、温度変化等によって主桁2とプレキャスト床版4に挙動差が生じるとしても、上記止水材8は、上記主桁2とプレキャスト床版4の隙間7に後から挿入して施工するようにしてあることから、該止水材8の施工を、上記主桁2とプレキャスト床版4との間へのコンクリート5の打設作業の直前に行うようにすることで、上記主桁2とプレキャスト床版4の挙動差が、上記止水材8にずれや剥がれ等の悪影響を及ぼす虞を解消することができる。   Thus, according to the post-installation construction method and apparatus of the water-stopping material of the present invention, after the precast floor slab 4 is placed on the upper side of the main girder 2, the main girder 2 and the precast floor slab 4 are changed by temperature change or the like. Even if a difference in behavior occurs, the water stop material 8 is inserted into the gap 7 between the main girder 2 and the precast floor slab 4 and then applied. By performing the operation immediately before the concrete 5 is placed between the main girder 2 and the precast floor slab 4, the behavior difference between the main girder 2 and the precast floor slab 4 is reduced in the waterstop material 8. The possibility of adverse effects such as displacement and peeling can be eliminated.

更に、上記止水材8は、連続気泡型発泡体のゴムにより断面形状の外形を丸形としてあるため、図2(イ)(ロ)に示すように、上記据付高さ可変式固定金具6の高さ調整用ナット10を操作して上記主桁2上における上記プレキャスト床版4の高さ位置を変化させる場合にも、上記主桁2とプレキャスト床版4との隙間7の寸法の拡大縮小にばねのように追従させることができて健全な止水効果を維持することができる。   Further, since the water-stopping material 8 has a round cross-sectional outer shape made of open-cell foam rubber, as shown in FIGS. Even when the height position of the precast floor slab 4 on the main girder 2 is changed by operating the height adjusting nut 10, the size of the gap 7 between the main girder 2 and the precast floor slab 4 is increased. The reduction can be followed like a spring, and a healthy water stop effect can be maintained.

又、上記止水材8は、上下方向に圧縮された状態から断面形状丸形としてある初期形状へ復元しようとするときの復元力によって主桁2の上面とプレキャスト床版4の下面に密着するようにしてあることから、上記主桁2やプレキャスト床版4における鋼構造やコンクリート構造の表面の不陸に良好に追従させることができて、高い止水効果を得ることができる。   Further, the water blocking material 8 is brought into close contact with the upper surface of the main girder 2 and the lower surface of the precast floor slab 4 by a restoring force when attempting to restore the initial shape as a circular cross-sectional shape from a state compressed in the vertical direction. Therefore, the surface of the steel structure or concrete structure in the main girder 2 or the precast floor slab 4 can be satisfactorily followed, and a high water stop effect can be obtained.

更に又、上記止水材8は、断面形状の外形が丸型としてあるため、該止水材8に水漏れが発生した個所については、図1(ハ)に示したように、止水材8の下部と、その下方の主桁2の上面との間に形成される楔状の隙間、及び、止水材8の上部と、その上方のプレキャスト床版4の下面との間に形成される楔状の隙間の上下2個所に、シーリング材16を充填してシールを行うことができる。したがって、比較として図5に示す如く、従来用いられていた如き矩形断面形状の止水材3に水漏れが発生した個所では、該止水材3に対し、後の工程で主桁2とプレキャスト床版4を固定するためのコンクリート5を打設する側、すなわち、各主桁2の幅方向中央部側からシーリング材16を上下方向の全面に亘り充填してシールを行う必要が生じていたのに比して、上記止水材8によれば、少ない量のシーリング材16でより簡易に止水することが可能になる。   Furthermore, since the water-stopping material 8 has a round cross-sectional outer shape, the water-stopping material 8 is shown in FIG. 8 and a wedge-shaped gap formed between the lower part of the main girder 2 below and the upper part of the water stop material 8 and the lower surface of the precast floor slab 4 above it. Sealing can be performed by filling the sealing material 16 in two places above and below the wedge-shaped gap. Therefore, as shown in FIG. 5, as a comparison, at a place where water leakage has occurred in the water-stopping material 3 having a rectangular cross section as used in the prior art, the main girder 2 and the precast are applied to the water-stopping material 3 in a later process. It has been necessary to perform sealing by filling the sealing material 16 over the entire surface in the vertical direction from the side where the concrete 5 for fixing the floor slab 4 is placed, that is, from the width direction central portion side of each main girder 2. In contrast, according to the water blocking material 8, it is possible to stop water more easily with a small amount of the sealing material 16.

次に、図3(イ)(ロ)及び図4(イ)(ロ)は本発明の実施の他の形態として、後入れ施工用の止水材の別の例を示すもので、以下のようにしてある。   Next, FIG. 3 (I) (B) and FIG. 4 (I) (B) show another example of a water stop material for post-installation construction as another embodiment of the present invention. It is like that.

すなわち、図3(イ)(ロ)に示すように、直線状に所要寸法延び且つ両端の閉じた所要の弾力性を有する素材製、たとえば、ゴム製のチューブ体17の長手方向所要個所に、空気注入バルブ18を設けてチューブ式の後入れ施工用の止水材8aを構成してある。   That is, as shown in FIGS. 3 (a) and 3 (b), a material having a required elasticity that extends in a straight line and has both ends closed, for example, a required portion in the longitudinal direction of a rubber tube body 17, for example, An air injection valve 18 is provided to constitute a water stop material 8a for tube-type post-installation work.

上記チューブ体17は、JISK6304に規定されている自転車タイヤ用チューブと同様の材質により直線状のチューブ形状に形成してある。   The tube body 17 is formed in a straight tube shape using the same material as that of the bicycle tire tube defined in JISK6304.

更に、上記チューブ体17の長手方向の所要個所、たとえば、長手方向一端部寄りの外周面部に、JISD4207に規定されている自動車用タイヤバルブ、又は、JISD9422に規定されている自転車用タイヤバルブと同様の空気注入バルブ18が取り付けてある。   Further, a required portion in the longitudinal direction of the tube body 17, for example, an outer tire surface near one end in the longitudinal direction, is the same as an automobile tire valve specified in JIS D4207 or a bicycle tire valve specified in JIS D9422. The air injection valve 18 is attached.

以上の構成としてある後入れ施工用の止水材8aを用いてプレキャスト床版を用いた橋梁の架設工事を行う場合は、上記実施の形態の場合と同様にして、橋脚1上に設置した主桁2の上側に、プレキャスト床版4を据付高さ可変式固定金具6を介して載置した後、主桁2の上面とプレキャスト床版4との間へコンクリート5の打設作業を行う前に、予め上記チューブ体17の中の空気を抜いて図3(イ)(ロ)に示したような扁平な状態としておいた上記チューブ式の後入れ施工用の止水材8aを、上記主桁2とプレキャスト床版4との間の隙間7に挿入して、主桁2の幅方向両端縁部と対応する個所に配置する。   When the bridge construction work using the precast floor slab is performed using the water stop material 8a for the post-installation construction having the above-described configuration, the main structure installed on the pier 1 is the same as in the above embodiment. Before placing the precast floor slab 4 on the upper side of the girder 2 via the fixed height fixing bracket 6 and then placing the concrete 5 between the upper surface of the main girder 2 and the precast floor slab 4 The tube-type post-installation water-stopping material 8a, which has been previously evacuated from the air in the tube body 17 to have a flat state as shown in FIGS. It is inserted into the gap 7 between the girder 2 and the precast floor slab 4, and is arranged at a location corresponding to both end edges in the width direction of the main girder 2.

上記所定個所に配置した扁平状態の止水材8aは、チューブ体17の下面側の幅方向中央部を、図示しない両面テープやシール材で各主桁2の上面に貼り付けるようにすることが望ましい。この際、上記所要の長さ寸法としてあるチューブ式の止水材8aの長さ寸法が、後工程で主桁2の上面とその上方のプレキャスト床版4との間へコンクリート5を充填する際に橋軸方向にシールが必要とされる領域の寸法に足りない場合は、上記各主桁2の上面の幅方向両端縁部に沿って、上記止水材8aを順次直列に配列させて貼り付けるようにする。   The flat water-stopping material 8a disposed at the predetermined location is such that the central portion in the width direction on the lower surface side of the tube body 17 is attached to the upper surface of each main girder 2 with a double-sided tape or a sealing material (not shown). desirable. At this time, when the length dimension of the tube-type water blocking material 8a as the required length dimension is filled with the concrete 5 between the upper surface of the main girder 2 and the precast floor slab 4 thereabove in the subsequent process. If the size of the area that needs to be sealed in the bridge axis direction is insufficient, the waterstops 8a are successively arranged in series along the widthwise both edges of the upper surface of each main girder 2 and pasted. Try to put it on.

その後、各主桁2の上面とその上方のプレキャスト床版4との間へコンクリート5の打設作業を行う直前に、上記チューブ式の止水材8aの空気注入バルブ18に、図示しないコンプレッサーや空気ボンベの如き加圧空気供給源を接続して、チューブ体17に空気注入バルブ18を経て加圧空気を注入することで、該チューブ体17を、図4(イ)に示す如く、上記主桁2とプレキャスト床版4との隙間7で膨張させる。これにより、該膨張させた各チューブ体17の下端部が上記主桁2の上面に、又、膨張させた各チューブ体17の上端部が上記プレキャスト床版4の下面にそれぞれ密着させられるようになる。   Thereafter, immediately before the concrete 5 is placed between the upper surface of each main girder 2 and the precast floor slab 4 thereabove, a compressor (not shown) or the like is connected to the air injection valve 18 of the tubular water-stopping material 8a. By connecting a pressurized air supply source such as an air cylinder and injecting pressurized air into the tube body 17 through the air injection valve 18, the tube body 17 is connected to the main body as shown in FIG. Expansion is performed in a gap 7 between the girder 2 and the precast floor slab 4. Thereby, the lower end portion of each expanded tube body 17 is brought into close contact with the upper surface of the main girder 2, and the upper end portion of each expanded tube body 17 is brought into close contact with the lower surface of the precast floor slab 4. Become.

上記のようにしてチューブ式の止水材8aを膨張させた後は、各主桁2の上面の幅方向両端縁部に沿って直列に配列させてある各チューブ式止水材6の隣接する端部同士を、図4(ロ)に示す如く、変性シリコン系等のシーリング材16で貼り付けて、上記各チューブ式止水材6の隣接する端部同士の間の止水及び固定を行う。   After inflating the tube-type water-stopping material 8a as described above, the tube-type water-stopping materials 6 arranged in series along both end edges in the width direction of the upper surface of each main girder 2 are adjacent to each other. As shown in FIG. 4 (b), the ends are pasted with a sealing material 16 such as a modified silicone, and water stopping and fixing between the adjacent ends of each of the tube-type water stopping materials 6 are performed. .

その後、上記のようにして膨張させることで主桁2の上面とプレキャスト床版4の下面に密着させた各チューブ式止水材6についての水漏れテストを行い、万一、水漏れが生じていた場合は、該水漏れ個所について、図4(イ)に示すように、図1(ハ)に示したものと同様に、上記膨張させた止水材8aの下部と、その下方の主桁2の上面との間に形成されている楔状の隙間、及び、膨張させた止水材8aの上部と、その上方のプレキャスト床版4の下面との間に形成されている楔状の隙間に、後の工程でコンクリート5を打設する側、すなわち、各主桁2の幅方向中央部側からシーリング材16を充填してシールを行うようにする。   Thereafter, a water leak test was performed on each tubular water-stopping material 6 in contact with the upper surface of the main girder 2 and the lower surface of the precast floor slab 4 by inflating as described above. In this case, as shown in FIG. 4 (a), the water leaking portion is similar to that shown in FIG. 1 (c), and the lower portion of the expanded water-stopping material 8a and the main girder below it. 2 and a wedge-shaped gap formed between the upper portion of the expanded water-stopping material 8a and the lower surface of the precast floor slab 4 above the wedge-shaped gap. In a later step, the sealing is performed by filling the sealing material 16 from the side where the concrete 5 is placed, that is, from the center in the width direction of each main girder 2.

その後は、上記実施の形態の場合と同様にして、主桁2の上面と、プレキャスト床版4の下面と、上記主桁2の幅方向両端縁部で膨張させた止水材8aによって囲まれる空間部に、コンクリート5を充填するよう打設して、上記プレキャスト床版4を主桁2に固定させるようにする。   Thereafter, in the same manner as in the above embodiment, the upper surface of the main girder 2, the lower surface of the precast floor slab 4, and the water stop material 8a expanded at both edges in the width direction of the main girder 2 are surrounded. The space is filled with concrete 5 so that the precast floor slab 4 is fixed to the main girder 2.

このように、上記チューブ式としてある後入れ施工用の止水材8aは、空気を注入することで断面形状の外形が丸形となるようにしてあることから、本実施の形態によっても、上記止水材8aの後入れ施工を行うことで、上記実施の形態と同様の効果を得ることができる。   In this way, the water stop material 8a for post-installation construction that is a tube type is configured such that the outer shape of the cross-sectional shape becomes a round shape by injecting air. The effect similar to the said embodiment can be acquired by performing the post-installation construction of the water stop material 8a.

更に、上記チューブ式としてある後入れ施工用の止水材8aは、単に空気を抜いて扁平な状態としておくことで、上記主桁2とプレキャスト床版4との隙間7に容易に挿入することができて、上記主桁2とプレキャスト床版4との隙間7における所定個所に配設するための作業に要する労力を更に軽減させることが可能になる。   Furthermore, the water-stopping material 8a for post-installation construction, which is a tube type, can be easily inserted into the gap 7 between the main girder 2 and the precast floor slab 4 by simply removing the air and keeping it flat. Thus, it is possible to further reduce the labor required for the work for disposing at a predetermined position in the gap 7 between the main beam 2 and the precast floor slab 4.

なお、本発明は、上記実施の形態にのみ限定されるものではなく、止水材8の直径寸法や肉厚、及び、止水材8aの空気注入による膨張時の径寸法や肉厚は、主桁2とプレキャスト床版4との間に設ける隙間7の上下方向寸法や、上記主桁2の上面とプレキャスト床版4の下面の双方に良好に密着させるために所望される力の大きさに応じて適宜変更してもよい。   In addition, this invention is not limited only to the said embodiment, The diameter dimension and thickness of the water stop material 8 at the time of expansion | swelling by the air injection of the water stop material 8a, and thickness are as follows. The vertical dimension of the gap 7 provided between the main girder 2 and the precast floor slab 4 and the magnitude of the force desired to make good contact with both the upper surface of the main girder 2 and the lower surface of the precast floor slab 4 It may be changed as appropriate according to the situation.

図1(イ)(ロ)(ハ)及び図2(イ)(ロ)の実施の形態における断面形状の外形を丸形としてある止水材8は、材料コストを削減するという観点からすると、中空状とすることが望ましいが、中実の止水材としてもよい。   From the viewpoint of reducing the material cost, the water-stopping material 8 having a round outer shape of the cross-sectional shape in the embodiment of FIGS. 1 (a), (b), and (c) and FIGS. Although it is desirable to be hollow, a solid water-stopping material may be used.

図3(イ)(ロ)及び図4(イ)(ロ)の実施の形態におけるチューブ式の後入れ施工用の止水材8aの空気注入バルブ18は、該止水材8aの使用前はチューブ体17の中の空気を抜いた扁平状態に保持でき、且つ該空気注入バルブ18を経てチューブ体17に所要圧力の加圧空気を注入した状態では内部から外部への空気の流出を阻止ずる逆止弁の機能を備えていれば、JISD4207に規定されている自動車用タイヤバルブやJISD9422に規定されている自転車用タイヤバルブ以外のいかなる形式の空気注入バルブを用いるようにしてもよい。又、上記止水材8aの長手方向における空気注入バルブ18の設置位置は適宜変更してもよい。上記チューブ体17の材質としては、柔軟で且つチューブ体17に注入する空気の圧力に耐えられるようにしてあれば、JISK6304に規定されている自転車タイヤ用チューブと同様の材質以外のいかなる材質を採用してもよい。上記止水材8aは、図4(イ)に示したように空気を注入して膨張させるときに、チューブ体17の上端部となる部分を、図示しない両面テープやシール材によってプレキャスト床版4の下面に固定させるようにしてもよい。   3 (a) (b) and FIG. 4 (b) (b), the air injection valve 18 of the water stop material 8a for tube post-installation work is used before the water stop material 8a is used. In the state where the air in the tube body 17 can be maintained in a flat state where the air has been removed and pressurized air of a required pressure is injected into the tube body 17 via the air injection valve 18, the outflow of air from the inside to the outside is prevented. Any type of air injection valve other than a vehicle tire valve specified in JIS D4207 or a bicycle tire valve specified in JIS D9422 may be used as long as it has a check valve function. Further, the installation position of the air injection valve 18 in the longitudinal direction of the water blocking material 8a may be changed as appropriate. As the material of the tube body 17, any material other than the material similar to the bicycle tire tube defined in JISK6304 is adopted as long as it is flexible and can withstand the pressure of air injected into the tube body 17. May be. When the water blocking material 8a is inflated by injecting air as shown in FIG. 4 (a), the portion which becomes the upper end portion of the tube body 17 is precast floor slab 4 with a double-sided tape or a sealing material (not shown). You may make it fix to the lower surface of.

据付高さ可変式固定金具6は、主桁2の上側に、プレキャスト床版4を所要の隙間7を隔てて支持でき、且つ該プレキャスト床版4の上記主桁2上における高さ位置を自在に調整できるようにしてあれば、スタッド部材9の下端部を主桁2の上面に固定しない構成としてもよく、又、スタッド部材9の外周面に刻設した雄ねじ(図示せず)と、該雄ねじに螺着させた高さ調整用ナット10による高さ調整機構以外のいかなる構成の高さ調整機構を採用してもよい等、図示した以外のいかなる形式の据付高さ可変式固定金具6を用いるようにしてもよい。   The installation height variable type fixing bracket 6 can support the precast floor slab 4 on the upper side of the main girder 2 with a required gap 7 therebetween, and the height position of the precast floor slab 4 on the main girder 2 can be freely set. The lower end portion of the stud member 9 may not be fixed to the upper surface of the main girder 2, and a male screw (not shown) engraved on the outer peripheral surface of the stud member 9 may be used. The height adjusting mechanism 6 of any type other than that shown in the figure other than the height adjusting mechanism other than the height adjusting mechanism other than the height adjusting mechanism by the height adjusting nut 10 screwed on the male screw may be adopted. You may make it use.

その他本発明の要旨を逸脱しない範囲内で種々変更を加え得ることは勿論である。   Of course, various modifications can be made without departing from the scope of the present invention.

本発明の止水材の後入れ施工方法及び装置の実施の一形態を示すもので、(イ)は概略正面図、(ロ)は(イ)のA−A方向矢視拡大図、(ハ)は(イ)のB部を拡大して示す図である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of a post-installation construction method and apparatus for a water-stopping material according to the present invention, in which (A) is a schematic front view, (B) is an enlarged view taken along the line AA in (A), ) Is an enlarged view of a portion B of (A). 主桁とプレキャスト床版との隙間に挿入する後入れ施工用の止水材の状態を示すもので、(イ)は主桁とプレキャスト床版との間隔が広い場合を、(ロ)は主桁とプレキャスト床版との間隔が狭い場合をそれぞれ示す概要図である。This shows the state of the water stop material for post-installation work inserted into the gap between the main girder and the precast floor slab. (A) shows the case where the distance between the main girder and the precast floor slab is wide, (b) shows the main It is a schematic diagram which respectively shows the case where the space | interval of a girder and a precast floor slab is narrow. 本発明の実施の他の形態として、後入れ施工用の止水材の別の例を示すもので、(イ)は概略斜視図、(ロ)は(イ)のC−C方向矢視図である。As another form of implementation of this invention, another example of the water stop material for post-installation construction is shown, (A) is a schematic perspective view, (B) is a CC direction arrow view of (A). It is. 図3の後入れ施工用の止水材の使用方法を説明するための図で、(イ)は主桁とプレキャスト床版との隙間に配した止水材を膨張させた状態を、(ロ)は直列に配列されているチューブ式止水材の隣接する端部同士を止水及び固定した状態をそれぞれ示す概要図である。FIG. 4 is a diagram for explaining a method of using a water stop material for post-installation construction in FIG. 3, (a) is an expanded state of the water stop material arranged in the gap between the main girder and the precast floor slab (Ro ) Is a schematic view showing a state in which the adjacent ends of the tubular water-stopping materials arranged in series are water-stopped and fixed, respectively. 従来用いられていた矩形断面形状の止水材に水漏れが生じた個所をシールする状態を示す概要図である。It is a schematic diagram which shows the state which seals the location which the water leak produced in the water stop material of the rectangular cross-sectional shape used conventionally. 従来の主桁とプレキャスト床版との固定構造を示す概略斜視図である。It is a schematic perspective view which shows the fixation structure of the conventional main girder and a precast floor slab.

符号の説明Explanation of symbols

2 主桁
4 プレキャスト床版
6 据付高さ可変式固定金具
7 隙間
8,8a 止水材
17 チューブ体
18 空気注入バルブ
2 Main girder 4 Precast floor slab 6 Mounting height variable fixing bracket 7 Clearance 8, 8a Water stop material 17 Tube body 18 Air injection valve

Claims (6)

主桁の上側に、裾付高さ可変式固定金具を介してプレキャスト床版を載置して、該裾付高さ可変式固定金具で支持されるプレキャスト床版と上記主桁との間に隙間を設け、次に、上記主桁とプレキャスト床版との隙間に、止水材を挿入して上記主桁の上面の幅方向両端縁部にそれぞれ配置し、しかる後、上記止水材を、上記裾付高さ可変式固定金具によって変化させられる隙間の寸法に追従させて膨張させて上記主桁の上面とプレキャスト床版の下面に密着させるようにすることを特徴とする止水材の後入れ施工方法。 On the upper side of the main girder, Susozuke through height adjustable mounting brackets and location mounting the precast slab, between the precast slab and the main beam which is supported at the height adjustable mounting brackets with該裾A gap is provided , and then, a water-stopping material is inserted into the gap between the main girder and the precast floor slab and arranged at both edges in the width direction of the upper surface of the main girder. The waterstop is characterized in that it is inflated by following the size of the gap that is changed by the hem height-variable fixing metal fitting so as to be in close contact with the upper surface of the main girder and the lower surface of the precast floor slab. Post-installation construction method. 止水材として、弾性を有し且つ断面形状の外形が丸形の止水材を用いるようにして、該止水材を、主桁とプレキャスト床版との隙間に、圧縮しながら転がすようにして挿入した後、該圧縮状態の止水材が初期形状に復元するよう膨張することで、上記主桁の上面とプレキャスト床版の下面に密着するようにする請求項1記載の止水材の後入れ施工方法。   As the water-stopping material, use a water-stopping material that has elasticity and has a round cross-sectional outer shape, and rolls the water-stopping material while compressing it in the gap between the main girder and the precast floor slab. The water-stopping material according to claim 1, wherein the water-stopping material in a compressed state is inflated so as to be restored to its initial shape, thereby closely contacting the upper surface of the main girder and the lower surface of the precast slab. Post-installation construction method. 止水材として、直線状に延び且つ両端部の閉塞されたチューブ体の所要個所に空気注入バルブを設けてなる止水材を用いて、該止水材を、主桁とプレキャスト床版との隙間に空気を抜いた状態で挿入した後、上記チューブ体に空気を注入することで、該止水材を上記主桁の上面とプレキャスト床版の下面に密着させるようにする請求項1記載の止水材の後入れ施工方法。   As the water-stopping material, using a water-stopping material that is provided with an air injection valve at a required portion of the tube body that extends linearly and is closed at both ends, the water-stopping material is connected to the main girder and the precast slab. 2. The water-proof material according to claim 1, wherein the water-stopping material is brought into close contact with the upper surface of the main girder and the lower surface of the precast floor slab by inserting air into the tube body after being inserted in a state where air is extracted from the gap. After-installation method for water-stopping material. 主桁と該主桁の上側に隙間を隔てて載置するプレキャスト床版を支持して上記隙間の寸法を自在に調整することができる据付高さ可変式固定金具と、上記主桁とプレキャスト床版との隙間に配置し、上記裾付高さ可変式固定金具によって変化させられる隙間の寸法に追従させて上記主桁の上面とプレキャスト床版の下面に密着させることができるように膨張させることができるようにしてある止水材とを備えてなる構成を有することを特徴とする止水材の後入れ施工装置。 A fixed height fixing bracket that supports a main girder and a precast floor slab placed on the upper side of the main girder with a gap therebetween and can freely adjust the size of the gap, and the main girder and the precast floor Place it in the gap with the plate and expand it so that it can be brought into close contact with the upper surface of the main girder and the lower surface of the precast floor slab by following the size of the gap that can be changed by the hem height-variable fixing bracket. Post-Assembly construction system of water stopping material characterized by having a composed and a water stopping material that is to allow configuration. 止水材を、弾性を有し且つ断面形状の外形が丸形の止水材とした請求項4記載の止水材の後入れ施工装置。   The post-installation construction device for a water-stopping material according to claim 4, wherein the water-stopping material is a water-stopping material having elasticity and having a round cross-sectional outer shape. 止水材を、直線状に延び且つ両端部の閉塞されたチューブ体の所要個所に空気注入バルブを設けてなる止水材とした請求項4記載の止水材の後入れ施工装置。   The water stop material post-installation construction apparatus according to claim 4, wherein the water stop material is a water stop material that is provided with an air injection valve at a required portion of a tube body that extends linearly and is closed at both ends.
JP2007250791A 2007-09-27 2007-09-27 Method and apparatus for post-installation of water-stopping material Expired - Fee Related JP5039490B2 (en)

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