JP2008255602A - Variable cross-section tower-like structure constructed by precast construction method - Google Patents

Variable cross-section tower-like structure constructed by precast construction method Download PDF

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JP2008255602A
JP2008255602A JP2007097127A JP2007097127A JP2008255602A JP 2008255602 A JP2008255602 A JP 2008255602A JP 2007097127 A JP2007097127 A JP 2007097127A JP 2007097127 A JP2007097127 A JP 2007097127A JP 2008255602 A JP2008255602 A JP 2008255602A
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precast
cylindrical body
steel material
boundary
precast cylindrical
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JP4874152B2 (en
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Hitoshi Asano
均 浅野
Makoto Ukekawa
誠 請川
Osamu Kobayashi
修 小林
Iku Sato
郁 佐藤
Sadahisa Nomoto
禎久 野本
Takumi Sato
琢巳 佐藤
Kosaku Murano
耕作 村野
Noriyuki Yamanaka
典幸 山中
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Toda Corp
Nippon Hume Corp
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Nippon Hume Corp
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
    • E04H12/16—Prestressed structures
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
    • E04H12/02—Structures made of specified materials
    • E04H12/12—Structures made of specified materials of concrete or other stone-like material, with or without internal or external reinforcements, e.g. with metal coverings, with permanent form elements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/728—Onshore wind turbines

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  • Civil Engineering (AREA)
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  • Life Sciences & Earth Sciences (AREA)
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  • Materials Engineering (AREA)
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Abstract

<P>PROBLEM TO BE SOLVED: To construct the whole of a variable cross-section tower-like structure such as a wind power generation tower, including a tubular body with a formed opening by using a precast construction method. <P>SOLUTION: In a lowermost block B<SB>0</SB>, a precast tower-like body 16 with an opening, the opening 18 of which is formed at a downside with respect to a precast tubular body 17 of a boundary and which has a thickened portion 19 thickened to the side of an inner peripheral surface over a prescribed range in a circumferential direction with respect to the opening 18 is arranged; prestressing steel 14 which is extended from the side of a foundation 12 is anchored to an outer peripheral portion of the top surface of the precast tubular body 17; prestressing steel 14A corresponding to the thickened portion 19 among pieces of prestressing steel extended to the side of an upper-side precast tubular body 5 has an anchoring portion on the side of the foundation 12, and inserted through the thickened portion 19 so as to be extended to the side of the precast tubular body 5; and unbonded prestressing steel 28 which is arranged in a location except the thickened portion 19, anchored to an inner peripheral portion of an undersurface of the precast tubular body 17, and extended to the side of the precast tubular body 5. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、プレキャストコンクリート部材を用いて構築された風力発電タワー等の変断面塔状構造物に係り、詳しくは資機材の搬入口や作業員等の出入口のための開口部を有する筒状体部分を含めてすべての塔状体をプレキャストコンクリート部材を用いて構築するようにした変断面塔状構造物に関する。   The present invention relates to a variable cross-section tower structure such as a wind power generation tower constructed using a precast concrete member, and more specifically, a cylindrical body having an opening for an entrance / exit of a material / equipment entrance or an operator The present invention relates to a variable cross-section tower structure in which all tower bodies including a part are constructed using precast concrete members.

近年、地球温暖化防止のため二酸化炭素ガスの排出抑制への行動が迫られているが、その中でクリーンな電力供給源として風力発電の導入が世界中で進んでいる。例えば、欧州風力エネルギー協会は２０２０年までに世界電力の１２％を風力発電でまかなうことを目標に掲げ、一方日本では２０１０年までに３００万kW（2000kWクラスの風車換算で1500基）導入という目標を掲げるなどしており（下記非特許文献１参照）、電力会社や官民の資本による風力発電の導入が今後も加速されていくものと考えられる。   In recent years, actions to reduce carbon dioxide gas emissions have been urged to prevent global warming, and wind power generation has been introduced all over the world as a clean power supply source. For example, the European Wind Energy Association has set a goal of supplying 12% of world electricity by wind power by 2020, while Japan aims to introduce 3 million kW (1500 units in 2000kW class windmill conversion) by 2010. (See Non-Patent Document 1 below), and it is thought that the introduction of wind power generation by electric power companies and public and private capital will continue to be accelerated.

ところで、前記風力発電タワーの構築にあたり、従来は鋼製タワーが一般的であったが、経済性の点で優れ、かつ高剛性で耐久性が高く、更に定期的なメンテナンスが不要なコンクリート製風力発電タワーに、今後多くの需要が期待されている。加えて、コンクリート製のプレキャスト部材を用いた工法（プレキャスト工法）を採用する場合には、急速施工の要請にも対応するものとなる。   By the way, in the construction of the wind power generation tower, a steel tower has been generally used. However, it is excellent in terms of economy, high rigidity, high durability, and does not require regular maintenance. Much demand is expected for power generation towers in the future. In addition, when a construction method using a precast member made of concrete (precast construction method) is adopted, it also corresponds to a request for rapid construction.

このような背景の下、本出願人は下記特許文献１において、コンクリート製のプレキャスト筒状体を高さ方向に複数積み上げ、各プレキャスト筒状体をＰＣ鋼材により緊結し一体化を図った塔状構造物において、前記塔状構造物を高さ方向に、１又は複数のプレキャスト筒状体毎にブロック分けし、各ブロック内では部材軸方向に同外径断面のプレキャスト筒状体を使用する条件の下で前記プレキャスト筒状体を積み上げ、高さ方向に段階的に外径寸法が縮小される変断面形状とするとともに、ブロック分けされた各境界部に、下段側プレキャスト筒状体側から延長されるＰＣ鋼材を上面外周部に定着させるとともに、上段側プレキャスト筒状体側に延長されるＰＣ鋼材を下面内周部に定着させる境界部プレキャスト筒状体を介在させるようにした変断面塔状構造物を提案した。
特開２００６−２９９６３１号公報 牛山、“風力発電実用化時代を迎えて”、Civil Engineering Journal 2004.8、平成16年8月、p.7-11 Under such a background, in the following Patent Document 1, the present applicant has stacked a plurality of concrete precast cylindrical bodies in the height direction, and each precast cylindrical body is tightly joined by PC steel to be integrated into a tower shape. In the structure, the tower-like structure is divided into blocks in the height direction for each of one or a plurality of precast cylindrical bodies, and a condition in which a precast cylindrical body having the same outer diameter cross section in the member axial direction is used in each block. The precast cylindrical body is piled up under to form a variable cross-sectional shape whose outer diameter dimension is gradually reduced in the height direction, and extended from the lower precast cylindrical body side to each boundary portion divided into blocks. PC steel material to be fixed on the outer periphery of the upper surface, and a boundary precast cylindrical body for fixing the PC steel material extended to the upper precast cylindrical body side to the inner surface of the lower surface is interposed It proposed the strange cross-section tower-like structure.
JP 2006-299631 A Ushiyama, “Toward the Practical Use of Wind Power Generation”, Civil Engineering Journal 2004.8, August 2004, p.7-11

しかしながら、資機材や人の出入口となる開口部を有する塔状構造物の場合、、開口部が形成される最下段の筒状体部分は、開口部の補強が必要となることから、場所打ちコンクリートによって構築されていた。このため、上記特許文献１記載の変断面塔状構造物においても、構造物全体をプレキャスト化することができていなかった。   However, in the case of a tower-like structure having an opening serving as a doorway for equipment and people, the bottom cylindrical portion where the opening is formed requires reinforcement of the opening. It was built with concrete. For this reason, even in the variable section tower structure described in Patent Document 1, the entire structure could not be precast.

そこで本発明の主たる課題は、コンクリート製のプレキャスト筒状体を高さ方向に複数積み上げ、各プレキャスト筒状体をＰＣ鋼材により緊結し一体化を図るとともに、下端部に資機材や人の出入口となる開口部が形成された変断面塔状構造物において、一般部の筒状体以外に開口部が形成される筒状体部分についても、プレキャスト筒状体を使用し構造物全体をプレキャスト工法で構築できるようにした変断面塔状構造物を提供することにある。   Therefore, the main problem of the present invention is that a plurality of concrete precast cylindrical bodies are stacked in the height direction, and each precast cylindrical body is fastened and integrated with PC steel, and equipment and people's entrances and exits are provided at the lower end. In a tower structure with a variable cross-section formed with an opening, a precast cylindrical body is used to form the entire structure using a precast method for a cylindrical body portion in which an opening is formed in addition to a general cylindrical body. An object of the present invention is to provide a tower structure having a variable cross section that can be constructed.

前記課題を解決するために請求項１に係る本発明として、コンクリート製のプレキャスト筒状体を高さ方向に複数積み上げ、各プレキャスト筒状体をＰＣ鋼材により緊結し一体化を図った塔状構造物において、
前記塔状構造物を高さ方向に、１又は複数のプレキャスト筒状体毎にブロック分けし、各ブロック内では部材軸方向に同外径断面のプレキャスト筒状体を使用する条件の下で前記プレキャスト筒状体を積み上げ、高さ方向に段階的に外径寸法が縮小される変断面形状とするとともに、ブロック分けされた各境界部に、下段側プレキャスト筒状体とほぼ同じ外径寸法を有するとともに、上段側プレキャスト筒状体とほぼ同じ内径寸法を有する境界部プレキャスト筒状体を介在させ、
最下段のブロック以外では、下段側プレキャスト筒状体側から延長されるＰＣ鋼材を前記境界部プレキャスト筒状体の上面外周部に定着させるとともに、上段側プレキャスト筒状体側に延長されるＰＣ鋼材を前記境界部プレキャスト筒状体の下面内周部に定着させ、
最下段のブロックにおいて、前記境界部プレキャスト筒状体よりも下段側に、周面の一部に開口部を有するとともに、この開口部より周方向に所定範囲に亘って他の部分よりも内周面側に増厚された増厚部を備えた１又は複数の開口部付きプレキャスト塔状体が配置され、基礎側から延長されるＰＣ鋼材を前記境界部プレキャスト筒状体の上面外周部に定着させるとともに、上段側プレキャスト筒状体側に延長されるＰＣ鋼材の内、前記増厚部に対応するＰＣ鋼材については基礎側に定着部を有し、前記増厚部を挿通させて上段側プレキャスト筒状体側に延長し、前記増厚部以外に配置されるＰＣ鋼材については前記境界部プレキャスト筒状体の下面内周部に定着し、上段側プレキャスト筒状体側に延長したことを特徴とするプレキャスト工法による変断面塔状構造物が提供される。 In order to solve the above-mentioned problems, the present invention according to claim 1 is a tower-like structure in which a plurality of precast cylindrical bodies made of concrete are stacked in the height direction, and each precast cylindrical body is fastened and integrated with a PC steel material. In things,
The tower-like structure is divided into blocks in the height direction for each of one or a plurality of precast cylindrical bodies, and the precast cylindrical body having the same outer diameter cross section is used in the member axial direction in each block. Precast cylindrical bodies are stacked to form a variable cross-sectional shape whose outer diameter dimension is reduced stepwise in the height direction, and the same outer diameter dimension as that of the lower-stage precast cylindrical body is formed on each boundary portion divided into blocks. And having a boundary precast tubular body having substantially the same inner diameter as the upper stage precast tubular body,
Except for the lowermost block, the PC steel material extended from the lower precast tubular body side is fixed to the outer periphery of the upper surface of the boundary precast cylindrical body, and the PC steel material extended to the upper precast tubular body side is Fix it to the inner periphery of the lower surface of the boundary precast cylindrical body,
In the lowermost block, an opening is formed in a part of the peripheral surface on the lower side of the boundary part precast cylindrical body, and the inner periphery of the inner periphery of the other part over a predetermined range in the circumferential direction from the opening. Precast towers with one or more openings with a thickened part thickened on the surface side are arranged, and PC steel material extended from the foundation side is fixed to the outer peripheral part of the upper surface of the boundary part precast cylindrical body Among the PC steel materials extended to the upper precast cylindrical body side, the PC steel material corresponding to the thickened portion has a fixing portion on the base side, and the thickened portion is inserted through the upper precast tube PC steel material that extends to the side of the body and is arranged on the other side than the thickened part is fixed to the inner periphery of the lower surface of the boundary part precast tubular body, and is precast that extends to the upper stage side precast tubular body side Craft Variable cross-section in column-like structure according to is provided.

上記請求項１記載の本発明では、最下段のブロック以外（以下、一般部ブロックという。）では、前記特許文献１に記載された変断面塔状構造物の構造を採用する条件の下、最下段のブロックにおいては、前記境界部プレキャスト筒状体よりも下段側に、周面の一部に開口部を有するとともに、この開口部より周方向に所定範囲に亘って他の部分よりも内周面側に増厚された増厚部を備えた１又は複数の開口部付きプレキャスト塔状体を配置するようにする。そして、基礎側から延長されるＰＣ鋼材については、前記一般部ブロックと同様に、前記境界部プレキャスト筒状体の上面外周部に定着させるようにし、上段側プレキャスト筒状体側に延長されるＰＣ鋼材の内、前記増厚部に対応するＰＣ鋼材については基礎側に定着部を有し、前記増厚部を挿通させて上段側プレキャスト筒状体側に延長し、前記増厚部以外に配置されるＰＣ鋼材については前記境界部プレキャスト筒状体の下面内周部に定着し、上段側プレキャスト筒状体側に延長させるようにしたものである。   In the present invention described in claim 1, except for the lowest block (hereinafter referred to as a general block), under the condition of adopting the structure of the variable cross-section tower structure described in Patent Document 1, The lower block has an opening in a part of the peripheral surface on the lower side of the boundary part precast cylindrical body, and the inner periphery of the inner periphery of other parts over a predetermined range in the circumferential direction from the opening. One or a plurality of precast towers with an opening provided with a thickened portion thickened on the surface side is arranged. And about the PC steel material extended from the foundation side, it is made to fix to the upper-surface outer peripheral part of the said boundary part precast cylindrical body similarly to the said general part block, and PC steel material extended to the upper stage side precast cylindrical body side Among them, the PC steel material corresponding to the thickened portion has a fixing portion on the base side, extends through the thickened portion to the upper precast cylindrical body side, and is disposed in addition to the thickened portion. The PC steel material is fixed to the inner peripheral portion of the lower surface of the boundary precast cylindrical body and is extended to the upper precast cylindrical body side.

換言すれば、前記最下段のブロックにおいて、上段側ブロックとの間に介在された境界部プレキャスト筒状体の形状を活用することで、開口部を補強するものであり、開口部近傍の周壁に前記増厚部を作り、上段側プレキャスト筒状体側に延長されるＰＣ鋼材の内、前記増厚部に対応するＰＣ鋼材については基礎側に定着部を有し、前記増厚部を挿通させて上段側プレキャスト筒状体側に延長することで、開口部周囲の周壁をＰＣ鋼材によって補強する構造としたものである。   In other words, in the lowermost block, the opening is reinforced by utilizing the shape of the boundary precast cylindrical body interposed between the upper block and the peripheral wall near the opening. The PC steel material corresponding to the thickened portion of the PC steel material extended to the upper side precast cylindrical body side having the thickened portion has a fixing portion on the base side, and is inserted through the thickened portion. By extending to the upper precast cylindrical body side, the peripheral wall around the opening is reinforced with PC steel.

従って、開口部が形成されるプレキャスト筒状体部分において、開口部の補強をＰＣ鋼材によって兼用した上記構造を採用することによって、構造物全体をプレキャスト工法で構築できるようになる。   Therefore, in the precast cylindrical body portion where the opening is formed, the entire structure can be constructed by the precast method by adopting the above structure in which the opening is reinforced by the PC steel material.

請求項２に係る本発明として、前記プレキャスト筒状体において、外周側に配置されるＰＣ鋼材と、内周側に配置されるＰＣ鋼材とは千鳥状配置としてある請求項１記載のプレキャスト工法による変断面塔状構造物が提供される。   As the present invention according to claim 2, in the precast cylindrical body, the PC steel material arranged on the outer peripheral side and the PC steel material arranged on the inner peripheral side are arranged in a staggered manner. A variable section tower structure is provided.

上記請求項２記載の発明においては、プレキャスト筒状体の外周側に配置されるＰＣ鋼材と、内周側に配置されるＰＣ鋼材とは千鳥状配置とすることにより緊張応力を周方向に均等化できるようになる。   In the invention of the second aspect, the PC steel material arranged on the outer peripheral side of the precast cylindrical body and the PC steel material arranged on the inner peripheral side are arranged in a staggered manner so that the tension stress is evenly distributed in the circumferential direction. It becomes possible to become.

請求項３に係る本発明として、前記最下段の境界部プレキャスト筒状体において、前記増厚部以外の上段側プレキャスト筒状体側に延長されるＰＣ鋼材としてアンボンドＰＣ鋼材を予め埋設し、最下段以外の境界部プレキャスト筒状体において、上段側プレキャスト筒状体側に延長されるすべてのＰＣ鋼材としてアンボンドＰＣ鋼材を予め埋設してある請求項１、２いずれかに記載のプレキャスト工法による変断面塔状構造物が提供される。   As the present invention according to claim 3, in the lowermost boundary precast cylindrical body, an unbonded PC steel material is embedded in advance as a PC steel material extended to the upper precast cylindrical body side other than the thickened portion, and the lowermost stage An unbonded PC steel material is pre-embedded as all the PC steel material extended to the upper stage side precast cylindrical body side in the boundary portion precast cylindrical body other than the above, A shaped structure is provided.

上記請求項３記載の本発明は、前記境界部プレキャスト筒状体において、上段側プレキャスト筒状体側に延長されるＰＣ鋼材として、アンボンドＰＣ鋼材を予め埋設しておくことにより、施工の効率化を図れるようになる。   In the boundary precast tubular body according to the third aspect of the present invention, in the boundary portion precast tubular body, as the PC steel material extended to the upper stage side precast tubular body side, unbonded PC steel material is embedded in advance, thereby improving the construction efficiency. It will come to be able to plan.

以上詳説のとおり本発明によれば、コンクリート製のプレキャスト筒状体を高さ方向に複数積み上げ、各プレキャスト筒状体をＰＣ鋼材により緊結し一体化を図るとともに、下端部に資機材や人の出入口となる開口部が形成された変断面塔状構造物において、一般部の筒状体以外に開口部が形成される筒状体部分についても、プレキャスト筒状体を使用し構造物全体をプレキャスト工法で構築できるようになる。   As described in detail above, according to the present invention, a plurality of concrete precast cylindrical bodies are stacked in the height direction, and each precast cylindrical body is tightly coupled with PC steel to be integrated, and at the lower end, equipment and people Pre-cast tubular body is used to precast the entire structure of the cylindrical section where the opening is formed in addition to the general cylindrical body. It will be possible to build by construction method.

以下、本発明の実施の形態について図面を参照しながら詳述する。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

風力発電設備１は、図１に示されるように、風を受け回転する回転翼２と、発電設備及びその制御設備を有するナセル３と、前記回転翼２及びナセル３を支持するタワー４（塔状構造物）からなる。   As shown in FIG. 1, the wind power generation facility 1 includes a rotor blade 2 that rotates by receiving wind, a nacelle 3 having a power generation facility and its control facility, and a tower 4 (tower) that supports the rotor blade 2 and the nacelle 3. Shaped structure).

前記タワー４は、基礎部１２とナセル３の結合部１３との間を、高さ方向に１又は複数の、図示例ではブロックＢ０〜Ｂ４の５ブロックに区分し、各ブロックＢ０〜Ｂ４内では部材軸方向に同外形断面のプレキャスト筒状体１６、５〜８を使用する条件の下で、前記プレキャスト筒状体１６、５〜８を積み上げるとともに、ブロック分けされた各境界部に、下段側プレキャスト筒状体とほぼ同じ外径寸法を有するとともに、上段側プレキャスト筒状体とほぼ同じ内径寸法を有する境界部プレキャスト筒状体１７，９〜１１を介在させることにより、高さ方向に段階的に外径寸法が徐々に縮小される変断面形状としたものである。 The tower 4 divides the space between the base portion 12 and the joint portion 13 of the nacelle 3 into one or a plurality of blocks in the height direction, in the illustrated example, five blocks B 0 to B 4 , and each block B 0 to the B within 4 under the conditions using precast cylindrical body 16,5～8 the same outer cross-section in the member axis, with stacking the precast cylindrical body 16,5～8, each boundary portion which is divided into blocks In addition, by interposing boundary precast cylindrical bodies 17 and 9 to 11 having substantially the same outer diameter as the lower stage side precast cylindrical body and substantially the same inner diameter dimension as the upper stage side precast cylindrical body, The cross-sectional shape is such that the outer diameter dimension is gradually reduced stepwise in the direction.

そして、最下段のブロックＢ０以外（一般部ブロックＢ１〜Ｂ４）では、下段側プレキャスト筒状体側から延長されるＰＣ鋼材１４を前記境界部プレキャスト筒状体９〜１１の上面外周部に定着させるとともに、上段側プレキャスト筒状体側に延長されるＰＣ鋼材１４を前記境界部プレキャスト筒状体９〜１１の下面内周部に定着させるようにし、最下段のブロックＢ０においては、前記境界部プレキャスト筒状体１７よりも下側に、周面の一部に開口部１８を有するとともに、この開口部１８より周方向に所定範囲に亘って他の部分よりも内周面側に増厚された増厚部１９を備えた１又は複数の開口部付きプレキャスト塔状体１６，１６が配置され、基礎１２側から延長されるＰＣ鋼材１４を前記境界部プレキャスト筒状体１７の上面外周部に定着させるとともに、上段側プレキャスト筒状体５側に延長されるＰＣ鋼材１４の内、前記増厚部１９に対応するＰＣ鋼材１４については基礎１２側に定着部を有し、前記増厚部１９を挿通させて上段側プレキャスト筒状体５側に延長し、前記増厚部１９以外に配置されるＰＣ鋼材１４については前記境界部プレキャスト筒状体１７の下面内周部に定着し、上段側プレキャスト筒状体５側に延長させるようにしたものである。 And, except for the lowermost block B 0 (general part blocks B 1 to B 4 ), the PC steel material 14 extended from the lower side precast cylindrical body side is placed on the outer periphery of the upper surface of the boundary precast cylindrical bodies 9 to 11. together to fix, so as to fix the PC steel member 14 extending in the upper side precast cylindrical side on the bottom surface inner peripheral portion of the boundary portion precast cylindrical body 9-11, in block B 0 of the lowest stage, the boundary A part of the peripheral surface has an opening 18 below the part precast cylindrical body 17, and is thicker on the inner peripheral surface side than the other parts over a predetermined range in the circumferential direction from the opening 18. One or a plurality of precast towers 16, 16 with openings provided with the increased thickness portion 19 are arranged, and the PC steel material 14 extended from the base 12 side is placed on the upper surface of the boundary precast tubular body 17. The PC steel material 14 corresponding to the thickened portion 19 out of the PC steel material 14 that is fixed to the peripheral portion and extended to the upper-stage precast cylindrical body 5 side has a fixing portion on the foundation 12 side. The thick steel portion 19 is inserted and extended to the upper precast tubular body 5 side, and the PC steel material 14 arranged other than the thickened portion 19 is fixed to the inner peripheral portion of the lower surface of the boundary precast tubular body 17. The upper stage side precast tubular body 5 is extended.

以下、一般部ブロックＢ１〜Ｂ４と最下段ブロックＢ０とに分けて詳述する。
〔一般部ブロックＢ１〜Ｂ４〕
図２はタワー４のプレキャスト筒状体５〜８の縦断面図、平面図及び底面図であり、図３は接合部拡大縦断面図、図４は境界部プレキャスト筒状体９〜１１の縦断面図、平面図及び底面図である。 Hereinafter, the general part blocks B 1 to B 4 and the lowermost block B 0 will be described in detail.
[General unit blocks B 1 .about.B 4]
2 is a longitudinal sectional view, a plan view, and a bottom view of the precast tubular bodies 5 to 8 of the tower 4, FIG. 3 is an enlarged longitudinal sectional view of a joint portion, and FIG. 4 is a longitudinal section of the boundary precast tubular bodies 9 to 11. It is a surface view, a top view, and a bottom view.

前記各プレキャスト筒状体５〜８は、図２に示されるように、軸方向に同一断面とされる円形筒状のプレキャスト部材であり、それぞれが同一の型枠を用いて製作されるか、遠心成形により製造された中空プレキャスト部材が用いられる。   As shown in FIG. 2, each of the precast cylindrical bodies 5 to 8 is a circular cylindrical precast member having the same cross section in the axial direction, and each is manufactured using the same formwork, A hollow precast member manufactured by centrifugal molding is used.

壁面内には鉄筋２０の他、周方向に適宜の間隔でＰＣ鋼材１４を挿通するためのシース２１、２１…が埋設されている。このシース２１、２１…の下端部にはＰＣ鋼材１４同士を連結するためのカップラーを挿入可能とするためにシース拡径部２１ａが形成されているとともに、上部には予め工場製作時に定着用アンカープレート２４が埋設されるか、現場で定着用アンカープレート２４を嵌設するための箱抜き部２２が形成されている。また、上面には吊り金具２３が複数設けられている。   In addition to the reinforcing bars 20, sheaths 21, 21... For inserting the PC steel material 14 are embedded in the wall surface at appropriate intervals in the circumferential direction. A sheath diameter-expanding portion 21a is formed at the lower end portion of the sheaths 21, 21... So that a coupler for connecting the PC steel members 14 can be inserted. The plate 24 is embedded, or a box opening 22 for fitting the fixing anchor plate 24 is formed on site. In addition, a plurality of suspension fittings 23 are provided on the upper surface.

プレキャスト筒状体５〜８同士の緊結は、図３(A)に示されるように、下段側プレキャスト筒状体５〜８から上方に延長されたＰＣ鋼材１４、１４…をシース２１、２１…に挿通させながらプレキャスト筒状体５〜８を積み重ねたならば、予め埋設されるか、または前記箱抜き部２２に嵌設されたアンカープレート２４と、ナット部材２５によりＰＣ鋼材１４に張力を導入し一体化を図る。また、グラウト注入孔２７からグラウト材をシース２１内に注入する。なお、前記アンカープレート２４に形成された孔２４ａはグラウト注入確認孔であり、該確認孔からグラウト材が吐出されたことをもってグラウト材の充填を終了する。   As shown in FIG. 3 (A), the precast cylindrical bodies 5 to 8 are fastened with the PC steel materials 14 and 14 extending upward from the lower-stage precast cylindrical bodies 5 to 8 as sheaths 21, 21. If the precast cylindrical bodies 5 to 8 are stacked while being inserted into the PC steel material 14, the tension is introduced into the PC steel material 14 by the anchor plate 24 and the nut member 25 that are embedded in advance or fitted in the box-cutting portion 22. And unite. Further, a grout material is injected into the sheath 21 from the grout injection hole 27. The hole 24a formed in the anchor plate 24 is a grout injection confirmation hole, and the filling of the grout material is completed when the grout material is discharged from the confirmation hole.

次に、図３(B)に示されるように、ＰＣ鋼材１４の突出部に対してカップラー２６を螺合し、上段側のＰＣ鋼材１４、１４…を連結したならば、上段となるプレキャスト筒状体５〜８のシース２１、２１…に前記ＰＣ鋼材１４、１４…を挿通させながら積み重ね、前記要領によりＰＣ鋼材１４の定着を図る手順を順次繰り返すことにより高さ方向に積み上げられる。この際、下段側プレキャスト筒状体と上段側プレキャスト筒状体との接合面には止水性確保及び合わせ面の接合のためにエポキシ樹脂系などの接着剤１５やシール材が塗布される。   Next, as shown in FIG. 3 (B), if the coupler 26 is screwed into the protruding portion of the PC steel material 14 and the upper PC steel materials 14, 14. The PC steel materials 14, 14... Are stacked while being inserted through the sheaths 21, 21... Of the bodies 5 to 8, and the PC steel materials 14 are stacked in the height direction by sequentially repeating the procedure for fixing the PC steel materials 14 according to the above procedure. At this time, an adhesive 15 such as an epoxy resin or a sealing material is applied to the joint surface between the lower-stage precast tubular body and the upper-stage precast tubular body in order to ensure waterproofness and join the mating surfaces.

一方、前記各境界部プレキャスト筒状体９〜１１は、図４に示されるように、下段側プレキャスト筒状体とほぼ同じ外径寸法とされるとともに、上段側プレキャスト筒状体とほぼ同じ内径寸法とされる断面形状を成し、前記各プレキャスト筒状体５〜８と同様に、それぞれの同一の型枠を用いて製作されるか、遠心成形により製造される。   On the other hand, as shown in FIG. 4, each of the boundary precast cylindrical bodies 9 to 11 has substantially the same outer diameter as the lower precast cylindrical body and the same inner diameter as the upper precast cylindrical body. It has a cross-sectional shape with dimensions, and is manufactured using the same formwork or by centrifugal molding in the same manner as each of the precast cylindrical bodies 5-8.

壁面内には鉄筋２０の他、相対的に外周側には周方向に適宜の間隔でＰＣ鋼材を挿通するためのシース２１、２１…が埋設されている。このシース２１、２１…の下端部はシース拡径部２１ａが形成されているとともに、上部には予め工場製作時に定着用アンカープレート２４が埋設されるか、現場で定着用アンカープレート２４を嵌設するための箱抜き部２２が形成されている。また、上面には吊り金具（図示せず）が複数設けられている。   In addition to the reinforcing bars 20, sheaths 21, 21... For inserting a PC steel material at appropriate intervals in the circumferential direction are embedded in the wall surface. A sheath widened portion 21a is formed at the lower end of each of the sheaths 21, 21... And a fixing anchor plate 24 is previously embedded in the upper part at the time of factory manufacture or a fixing anchor plate 24 is fitted in the field. A box opening portion 22 is formed. A plurality of suspension fittings (not shown) are provided on the upper surface.

また、壁面の相対的に内周側には、周方向に適宜の間隔で、境界部プレキャスト筒状体９（１０〜１１）の下面側にアンカープレート３０及びナット２９により定着されたアンボンドＰＣ鋼材２８、２８…が予め埋設されている。このアンボンドＰＣ鋼材２８の上端は境界部プレキャスト筒状体９（１０〜１１）の上面から突出して形成されている。また、前記外周側のシース２１、２１…の位置と、前記アンボンドＰＣ鋼材２８、２８…との配置は緊張応力の均等化を図るために千鳥状配置とされる。   Further, on the relatively inner peripheral side of the wall surface, an unbonded PC steel material fixed to the lower surface side of the boundary portion precast cylindrical body 9 (10 to 11) by an anchor plate 30 and a nut 29 at an appropriate interval in the circumferential direction. 28, 28... Are embedded in advance. The upper end of the unbonded PC steel material 28 is formed so as to protrude from the upper surface of the boundary portion precast cylindrical body 9 (10 to 11). In addition, the positions of the outer sheaths 21, 21... And the unbonded PC steel materials 28, 28... Are arranged in a staggered manner in order to equalize the tensile stress.

前記境界部プレキャスト筒状体９（１０、１１）と、下段側プレキャスト筒状体５（６、７）と、上段側プレキャスト筒状体６（７、８）との緊結部構造は、下段側プレキャスト筒状体５（６、７）側から延長されるＰＣ鋼材１４を該境界部プレキャスト筒状体９（１０、１１）の上面外周部に定着させるとともに、上段側プレキャスト筒状体６（７、８）側に延びるＰＣ鋼材（アンボンドＰＣ鋼材２８）を該境界部プレキャスト筒状体９（１０、１１）の下面内周部に定着させるようにする。   The tightly coupled portion structure of the boundary portion precast tubular body 9 (10, 11), the lower stage precast tubular body 5 (6, 7), and the upper stage precast tubular body 6 (7, 8) The PC steel material 14 extended from the precast cylindrical body 5 (6, 7) side is fixed to the outer periphery of the upper surface of the boundary precast cylindrical body 9 (10, 11), and the upper precast cylindrical body 6 (7 8) The PC steel material (unbonded PC steel material 28) extending to the side is fixed to the inner peripheral portion of the lower surface of the boundary precast tubular body 9 (10, 11).

具体的には図５に示されるように（代表的に境界部プレキャスト筒状体１０で説明）、下段側のプレキャスト筒状体６から上方に延長されたＰＣ鋼材１４、１４…をシース２１、２１…に挿通させながら境界部プレキャスト筒状体１０を積み重ねたならば、予め埋設されるか、または前記箱抜き部２２に嵌設されたアンカープレート２４と、ナット部材２５によりＰＣ鋼材１４、１４…に緊張力を導入し一体化を図る。この際、プレキャスト筒状体６、１０同士の合わせ面には接着剤１５又はシール材を塗布し、緊張導入力は断面作用力に対して常時ではフルプレストレスになるようにし、暴風時及び地震時等はパーシャルプレストレスとする。また、グラウト注入孔３２からグラウト材をシース２１内に注入するとともに、露出するナット２５部にはキャップ材３１を被せ、内部に防錆処理のためグリース等を充填する。   Specifically, as shown in FIG. 5 (typically described by the boundary portion precast cylindrical body 10), the PC steel materials 14, 14... When the boundary portion precast cylindrical body 10 is stacked while being inserted through 21..., The PC steel materials 14 and 14 are embedded by an anchor plate 24 and a nut member 25 that are embedded in advance or fitted in the box opening portion 22. Introduce tension to unify. At this time, the adhesive 15 or the sealing material is applied to the mating surfaces of the precast cylindrical bodies 6 and 10 so that the tension introduction force is always full prestress with respect to the cross-sectional action force, and during storms and earthquakes. Etc. shall be partial pre-stress. In addition, a grout material is injected into the sheath 21 from the grout injection hole 32, and the exposed nut 25 is covered with a cap material 31 and filled with grease or the like for rust prevention treatment.

次に、アンボンドＰＣ鋼材２８の上端部にカップラー３３を螺合し、上段側のＰＣ鋼材１４、１４…を連結したならば、プレキャスト筒状体７のシース２１、２１…に前記ＰＣ鋼材１４、１４…を挿通させながら積み重ね、前述した要領によりＰＣ鋼材１４の定着を図り、上段側のプレキャスト筒状体７を境界部プレキャスト筒状体１０に対して一体的に結合する。   Next, when the coupler 33 is screwed into the upper end portion of the unbonded PC steel material 28 and the upper PC steel materials 14, 14... Are connected, the PC steel material 14, the sheath 21, 21. 14 are stacked while being inserted, the PC steel material 14 is fixed in the manner described above, and the upper precast tubular body 7 is integrally coupled to the boundary portion precast tubular body 10.

ところで、上記形態例では、断面縮小部となる各境界部プレキャスト筒状体１０において、階段状の段部を形成するようにしたが、外観的にテーパー状に外径寸法を縮小させることもできる。図６(A)(B)はその場合の構造例を示したものである。先ず、図６(A)は、上段側に載荷されるプレキャスト塔状体７'として、内径寸法は同じとしながら、外径寸法を上側に行くに従って漸次縮小させた断面形状としたものである。この場合は、下段ＰＣ鋼材１４の定着部に対応する部位に箱抜き部７ａを形成しておき、防錆処理のためグリース等を充填した状態で設置するようにする。   By the way, in each of the above-described embodiments, the stepped step portion is formed in each boundary portion precast cylindrical body 10 which becomes the cross-sectional reduction portion. However, the outer diameter can be reduced in a tapered shape in appearance. . FIGS. 6A and 6B show structural examples in that case. First, FIG. 6 (A) shows a precast tower 7 ′ loaded on the upper side, having a cross-sectional shape in which the outer diameter is gradually reduced toward the upper side while the inner diameter is the same. In this case, the box opening 7a is formed in a portion corresponding to the fixing portion of the lower PC steel material 14, and is installed in a state filled with grease or the like for rust prevention treatment.

次いで、図６(B)に示される例は、上段側に載荷されるプレキャスト塔状体７'として、内径寸法は同じとしながら、外径寸法を上側に行くに従って漸次縮小させた断面形状とするとともに、下段側ＰＣ鋼材１４の定着部位に平面視で例えばＵ字状の切欠き７ｂを形成したものである。この場合は、露出するナット２５部にはキャップ材３１を被せ、内部に防錆処理のためグリース等を充填するようにする。   Next, in the example shown in FIG. 6B, the precast tower 7 'loaded on the upper side has a cross-sectional shape in which the outer diameter is gradually reduced toward the upper side while the inner diameter is the same. In addition, for example, a U-shaped notch 7b is formed in a fixing portion of the lower PC steel material 14 in a plan view. In this case, the exposed nut 25 is covered with a cap material 31 and filled with grease or the like for rust prevention treatment.

また、上記形態例では、各ＰＣ鋼材１４、２８はすべてプレキャスト筒状体５〜８の躯体内に設置したインナータイプの例を示したが、図７に示されるように、定着部以外ではプレキャスト筒状体５〜８の躯体から内側に出して配置したアウタータイプとすることも可能である。この場合も上記インナータイプと同様に、各境界部プレキャスト筒状体９（１０、１１）において、下段側プレキャスト筒状体側５（６、７）から延長されるＰＣ鋼材１４を該境界部プレキャスト筒状体９（１０、１１）の上面外周部に定着させるとともに、上段側プレキャスト筒状体側６（７、８）に延長されるＰＣ鋼材１４を該境界部プレキャスト筒状体９（１０、１１）の下面内周部に定着させるようにすればよいが、境界部プレキャスト筒状体９、１０、１１と隣接するプレキャスト筒状体６、７、８（５、６、７）との間で結合が図れないとともに、せん断耐力が確保できないおそれがあるため、各境界部プレキャスト筒状体９、１０、１１と上下に隣接するプレキャスト筒状体６、７、８（５、６、７）については、ＰＣ鋼材１４が躯体内を挿通するように、プレキャスト筒状体６、７、８（５、６、７）の内壁側に増厚されたケーブル挿通躯体部３４を有する断面形状とするのが望ましい。また、同断面のプレキャスト筒状体５〜８同士の接合部ではＰＣ鋼材１４によるせん断耐力が期待できないため、鉄筋等を境界部を跨ぐように配置するか、凹凸によるせん断キーを設けるようにするのが望ましい。   Moreover, in the said example of embodiment, although each PC steel materials 14 and 28 showed the example of the inner type installed in the housing of the precast cylindrical bodies 5-8, as shown in FIG. It is also possible to set it as the outer type arrange | positioned out from the housing of the cylindrical bodies 5-8 inside. Also in this case, similarly to the inner type, in each boundary portion precast cylindrical body 9 (10, 11), the PC steel material 14 extended from the lower-stage side precast cylindrical body side 5 (6, 7) is replaced with the boundary portion precast cylindrical body. PC steel material 14 is fixed to the outer peripheral portion of the upper surface of the cylindrical body 9 (10, 11) and extended to the upper precast cylindrical body side 6 (7, 8). The boundary precast cylindrical body 9 (10, 11) May be fixed to the inner peripheral portion of the lower surface of the rim, but it is connected between the precast cylindrical bodies 9, 10, 11 and the adjacent precast cylindrical bodies 6, 7, 8 (5, 6, 7). In addition, since there is a possibility that the shear strength cannot be secured, the precast cylindrical bodies 6, 7, 8 (5, 6, 7) adjacent to the boundary precast cylindrical bodies 9, 10, 11 are vertically , PC steel 1 So they inserted the building frame body, it is desirable to cross-sectional shape having a cable insertion skeleton portion 34 thickened on the inner wall of the precast cylindrical body 6, 7, and 8 (5,6,7). In addition, since the shear strength by the PC steel material 14 cannot be expected at the joint portion between the precast cylindrical bodies 5 to 8 having the same cross section, a reinforcing bar or the like is disposed so as to straddle the boundary portion, or a shear key by unevenness is provided. Is desirable.

〔最下段ブロックＢ０〕
次に、最下段ブロックＢ０について詳述する。 [Bottom block B 0 ]
Next, the lowermost block B0 will be described in detail.

図８は、開口部付きプレキャスト筒状体１６の平面図及び縦断面図であり、図９は境界部プレキャスト筒状体１７の平面図及び縦断面図、図１０は開口部付きプレキャスト筒状体１６の増厚部１９における接合拡大断面図、図１１は境界部プレキャスト筒状体１７と開口部付きプレキャスト筒状体１６との増厚部における接合部拡大断面図であり、図１２は境界部プレキャスト筒状体１７と開口部付きプレキャスト筒状体１６との非増厚部における接合部拡大断面図である。   8 is a plan view and a longitudinal sectional view of the precast tubular body 16 with an opening, FIG. 9 is a plan view and a longitudinal sectional view of the boundary precast tubular body 17, and FIG. 10 is a precast tubular body with an opening. FIG. 11 is an enlarged cross-sectional view of the junction at the thickened portion of the boundary precast tubular body 17 and the precast tubular body 16 with an opening, and FIG. It is a junction expanded sectional view in the non-thickening part of the precast cylindrical body 17 and the precast cylindrical body 16 with an opening part.

前記開口部ブロックＢ０で用いられるプレキャスト筒状体１６、１６は、図８に示されるように、周面の一部に開口部１８を有するとともに、この開口部１８より両側に、周方向に所定の範囲に亘って他の部分よりも内周面側に増厚された増厚部１９、１９を備えた、軸方向に同一断面とされる円形筒状のプレキャスト部材であり、同一の型枠を用いて製作される。 As shown in FIG. 8, the precast cylindrical bodies 16 and 16 used in the opening block B 0 have an opening 18 in a part of the circumferential surface, and on both sides of the opening 18 in the circumferential direction. It is a circular cylindrical precast member having the same cross section in the axial direction, provided with thickened portions 19 and 19 which are thickened on the inner peripheral surface side with respect to other portions over a predetermined range. Manufactured using a frame.

外周側の壁面内には鉄筋２０の他、周方向に適宜の間隔でＰＣ鋼材１４を挿通するためのシース２１、２１…が埋設されている。このシース２１、２１…の下端部にはＰＣ鋼材１４同士を連結するためのカップラーを挿入可能とするためにシース拡径部２１ａが形成されているとともに、上部には予め工場製作時に定着用アンカープレート２４が埋設されるか、現場で定着用アンカープレート２４を嵌設するための箱抜き部２２が形成されている。また、上面には吊り金具（図示せず）が複数設けられている。   In addition to the reinforcing bars 20, sheaths 21, 21... For inserting the PC steel material 14 at appropriate intervals in the circumferential direction are embedded in the outer peripheral wall surface. A sheath diameter-expanding portion 21a is formed at the lower end portion of the sheaths 21, 21... So that a coupler for connecting the PC steel members 14 can be inserted. The plate 24 is embedded, or a box opening 22 for fitting the fixing anchor plate 24 is formed on site. A plurality of suspension fittings (not shown) are provided on the upper surface.

また、前記各増厚部１９の内周側には、周方向に適宜の間隔で複数本の、図示例では３本の開口補強用ＰＣ鋼材１４Ａを挿通するためのシース２１、２１…が埋設されるとともに、このシース２１、２１…の下端部にはＰＣ鋼材１４同士を連結するためのカップラーを挿入可能とするためにシース拡径部２１ａが形成されているとともに、上部には予め工場製作時に定着用アンカープレート２４が埋設されるか、または現場で定着用アンカープレート２４を嵌設するための箱抜き部２２が形成されている。   In addition, a plurality of sheaths 21, 21... For inserting three opening reinforcing PC steel materials 14A in the illustrated example are embedded at an appropriate interval in the circumferential direction on the inner peripheral side of each thickened portion 19. In addition, a sheath enlarged diameter portion 21a is formed at the lower end of the sheaths 21, 21... So that a coupler for connecting the PC steel materials 14 can be inserted, and the upper portion is manufactured in advance by a factory. Sometimes a fixing anchor plate 24 is embedded, or a box opening portion 22 is formed for fitting the fixing anchor plate 24 on site.

一方、前記境界部プレキャスト筒状体１７は、図９に示されるように、下段側の開口部付きプレキャスト筒状体１６とほぼ同じ外径寸法とされるとともに、上段側プレキャスト筒状体５とほぼ同じ内径寸法とされる断面形状を成す筒状のプレキャスト部材であり、それぞれの同一の型枠を用いて製作されるか、遠心成形により製造される。   On the other hand, as shown in FIG. 9, the boundary portion precast tubular body 17 has substantially the same outer diameter as the lower stage precast tubular body 16 with an opening, and the upper stage side precast tubular body 5 and It is a cylindrical precast member having a cross-sectional shape having substantially the same inner diameter, and is manufactured using the same molds or manufactured by centrifugal molding.

壁面内には鉄筋２０の他、相対的に外周側には、下段側のプレキャスト筒状体１６の開口部１８に対応する領域以外の部分に、周方向に適宜の間隔でＰＣ鋼材を挿通するためのシース２１、２１…が埋設されている。このシース２１、２１…の下端部はシース拡径部２１ａが形成されているとともに、上部には予め工場製作時に定着用アンカープレート２４が埋設されるか、現場で定着用アンカープレート２４を嵌設するための箱抜き部２２が形成されている。また、上面には吊り金具（図示せず）が複数設けられている。   In addition to the reinforcing bars 20 in the wall surface, the PC steel material is inserted at an appropriate interval in the circumferential direction into a portion other than the region corresponding to the opening 18 of the lower precast cylindrical body 16 on the outer peripheral side. .. Are embedded. A sheath widened portion 21a is formed at the lower end of each of the sheaths 21, 21... And a fixing anchor plate 24 is previously embedded in the upper part at the time of factory manufacture or a fixing anchor plate 24 is fitted in the field. A box opening portion 22 is formed. In addition, a plurality of suspension fittings (not shown) are provided on the upper surface.

また、壁面の相対的に内周側には、下段側の開口部付きプレキャスト筒状体１６の増厚部１９、１９に配置される開口補強用ＰＣ鋼材１４Ａに対応する位置にシース２１、２１…が埋設され、それ以外の部分には、下面側にアンカープレート３０及びナット２９により定着されたアンボンドＰＣ鋼材２８が予め埋設されている。このアンボンドＰＣ鋼材２８の上端は境界部プレキャスト筒状体１７の上面から突出して形成されている。また、前記外周側のシース２１、２１…の位置と、前記アンボンドＰＣ鋼材２８、２８…との配置は緊張応力の均等化を図るために千鳥状配置とされる。   Further, on the relatively inner peripheral side of the wall surface, the sheaths 21 and 21 are located at positions corresponding to the opening reinforcing PC steel material 14A disposed in the thickened portions 19 and 19 of the lower-stage precast tubular body 16 with an opening. .. Are embedded, and the unbonded PC steel material 28 fixed in advance by the anchor plate 30 and the nut 29 is embedded in the other portions in advance. The upper end of the unbonded PC steel material 28 is formed so as to protrude from the upper surface of the boundary portion precast cylindrical body 17. In addition, the positions of the outer sheaths 21, 21... And the unbonded PC steel materials 28, 28... Are arranged in a staggered manner in order to equalize the tensile stress.

前記開口部付きプレキャスト筒状体１６の基礎部１２への緊結は、図１０(A)に示されるように、基礎部１２のアンカーフレーム（図示せず）に定着させたＰＣ鋼材１４及び開口補強用ＰＣ鋼材１４Ａの上端を基礎から突出させた状態としておき、カップラー２６を螺合し、上側に延長するようにＰＣ鋼材１４及び開口補強用ＰＣ鋼材１４Ａを連結する。   As shown in FIG. 10 (A), the precast cylindrical body 16 with the opening is fastened to the base 12 and the PC steel material 14 fixed to the anchor frame (not shown) of the base 12 and the opening reinforcement. The upper end of the PC steel material 14A is made to protrude from the foundation, the coupler 26 is screwed together, and the PC steel material 14 and the opening reinforcing PC steel material 14A are connected so as to extend upward.

次に、図１０(B)に示されるように、前記連結したＰＣ鋼材１４と開口補強用ＰＣ鋼材１４Ａとを所定のシース２１、２１…に挿通させながらプレキャスト筒状体１６を設置したならば、予め埋設されるか、または前記箱抜き部２２に嵌設されたアンカープレート２４と、ナット部材２５によりＰＣ鋼材１４及び開口補強用ＰＣ鋼材１４Ａに張力を導入し一体化を図る。また、グラウト注入孔２７からグラウト材をシース２１内に注入する。なお、前記アンカープレート２４に形成された孔２４ａはグラウト注入確認孔であり、該確認孔からグラウト材が吐出されたことをもってグラウト材の充填を終了する。   Next, as shown in FIG. 10 (B), if the precast cylindrical body 16 is installed while inserting the connected PC steel material 14 and the PC steel material 14A for opening reinforcement through predetermined sheaths 21, 21. The anchor plate 24 that is embedded in advance or fitted in the box-cutting portion 22 and the nut member 25 introduce tension to the PC steel material 14 and the opening reinforcing PC steel material 14A to achieve integration. A grout material is injected into the sheath 21 from the grout injection hole 27. The hole 24a formed in the anchor plate 24 is a grout injection confirmation hole, and the filling of the grout material is completed when the grout material is discharged from the confirmation hole.

前記要領により、開口部付きプレキャスト筒状体１６のシース２１、２１…にＰＣ鋼材１４及び開口補強用ＰＣ鋼材１４Ａを挿通させながら所定の段数、図示例では２段の開口部付きプレキャスト筒状体１６、１６を積み重ね、ＰＣ鋼材１４及び開口補強用ＰＣ鋼材１４Ａの定着を図る手順を繰り返すことにより高さ方向に積み上げる。この際、下段側プレキャスト筒状体１６と上段側プレキャスト筒状体１６との接合面には止水性確保及び合わせ面の接合のためにエポキシ樹脂系などの接着剤１５やシール材が塗布される。   In the above-described manner, the PC steel material 14 and the opening reinforcing PC steel material 14A are inserted through the sheaths 21, 21... 16 and 16 are stacked and stacked in the height direction by repeating the procedure for fixing the PC steel material 14 and the opening reinforcing PC steel material 14A. At this time, an adhesive 15 such as an epoxy resin or a sealing material is applied to the joint surface between the lower-stage precast tubular body 16 and the upper-stage precast tubular body 16 in order to ensure waterproofness and join the mating surfaces. .

所定の段数（図示例では２段）だけ開口部付きプレキャスト筒状体１６、１６を積み重ねたならば、境界部プレキャスト筒状体１７を積み重ねる。   If the precast cylindrical bodies 16 and 16 with openings are stacked by a predetermined number of stages (two in the illustrated example), the boundary portion precast cylindrical bodies 17 are stacked.

前記境界部プレキャスト筒状体１７と、下段側プレキャスト筒状体１６と、上段側プレキャスト筒状体５との緊結部構造は、前記基礎１２に定着され、下段側の開口部付きプレキャスト筒状体１６の外周側から延長されるＰＣ鋼材１４については、一般部ブロックＢ１〜Ｂ４と同様に、前記境界部プレキャスト筒状体１７の上面外周部に定着させる。定着要領は、前述したとおりである。 The tightly coupled structure of the boundary part precast cylindrical body 17, the lower stage side precast cylindrical body 16, and the upper stage side precast cylindrical body 5 is fixed to the foundation 12, and the precast cylindrical body with a lower stage side opening is provided. for PC steel member 14 extending from 16 the outer peripheral side of, like the general portion block B 1 .about.B 4, to be fixed on the upper surface outer peripheral portion of the boundary portion precast cylindrical body 17. The fixing procedure is as described above.

一方、内周側に配置されるＰＣ鋼材１４、１４Ａの内、増厚部１９に対応する開口補強用ＰＣ鋼材１４Ａについては、境界部プレキャスト筒状体１７の上面内周部に一旦定着し、その後に上段に配置されるプレキャスト筒状体５のＰＣ鋼材１４と接続する。具体的には、図１１に示されるように、下段側の開口部付きプレキャスト筒状体１６から上方に延長された開口補強用ＰＣ鋼材１４Ａ、１４Ａ…をシース２１、２１…に挿通させながら境界部プレキャスト筒状体１７を積み重ねたならば、予め埋設されるか、または前記箱抜き部２２に嵌設されたアンカープレート２４と、ナット部材２５により開口補強用ＰＣ鋼材１４Ａ、１４Ａ…に緊張力を導入し一体化を図る。この際、プレキャスト筒状体１６、１７同士の合わせ面には接着剤１５又はシール材を塗布し、緊張導入力は断面作用力に対して常時ではフルプレストレスになるようにし、暴風時及び地震時等はパーシャルプレストレスとする。また、グラウト注入孔２７からグラウト材をシース２１内に注入する。その後に、開口補強用ＰＣ鋼材１４Ａの上端部にカップラー２６を螺合し、上段側のＰＣ鋼材１４、１４…を連結したならば、プレキャスト筒状体５のシース２１、２１…に前記ＰＣ鋼材１４、１４…を挿通させながら積み重ね、前述した要領によりＰＣ鋼材１４の定着を図り、上段側のプレキャスト筒状体５を境界部プレキャスト筒状体１７に対して一体的に結合する。   On the other hand, among the PC steel materials 14 and 14A arranged on the inner peripheral side, the opening reinforcing PC steel material 14A corresponding to the thickened portion 19 is once fixed to the inner peripheral portion of the upper surface of the boundary portion precast tubular body 17, It connects with PC steel material 14 of the precast cylindrical body 5 arrange | positioned at the upper stage after that. Specifically, as shown in FIG. 11, the opening reinforcing PC steel materials 14 </ b> A, 14 </ b> A,... If the part precast cylindrical body 17 is stacked, the tension force is applied to the opening reinforcing PC steel materials 14A, 14A... By the anchor plate 24 and the nut member 25 that are embedded in advance or fitted in the boxing portion 22. To integrate. At this time, the adhesive 15 or the sealing material is applied to the mating surfaces of the precast cylindrical bodies 16 and 17 so that the tension introducing force is always full prestress with respect to the cross-sectional action force, and during storms and earthquakes. Etc. shall be partial pre-stress. A grout material is injected into the sheath 21 from the grout injection hole 27. After that, if the coupler 26 is screwed into the upper end portion of the opening reinforcing PC steel material 14A and the upper PC steel materials 14, 14... Are connected, the PC steel material is connected to the sheaths 21, 21. 14, 14... Are stacked, and the PC steel material 14 is fixed in the manner described above, and the upper precast tubular body 5 is integrally coupled to the boundary portion precast tubular body 17.

また、内周側に配置されるＰＣ鋼材の内、非増厚部に対応し、かつ上段側プレキャスト筒状体５側に延長されるＰＣ鋼材（アンボンドＰＣ鋼材２８）については、該境界部プレキャスト筒状体１７の下面内周部に定着させるようにする。具体的には、図１２に示されるように、内周側の前記増厚部１９以外の領域においては、アンボンドＰＣ鋼材２８の上端部にカップラー３３を螺合し、上段側のＰＣ鋼材１４、１４…を連結したならば、プレキャスト筒状体５のシース２１、２１…に前記ＰＣ鋼材１４、１４…を挿通させながら積み重ね、前述した要領によりＰＣ鋼材１４の定着を図り、上段側のプレキャスト筒状体５を境界部プレキャスト筒状体１７に対して一体的に結合する。   Moreover, about PC steel material (unbonded PC steel material 28) corresponding to a non-thickened portion among PC steel materials arranged on the inner peripheral side and extended to the upper stage side precast cylindrical body 5 side, the boundary portion precast It is made to fix to the inner peripheral part of the lower surface of the cylindrical body 17. Specifically, as shown in FIG. 12, in a region other than the thickened portion 19 on the inner peripheral side, the coupler 33 is screwed into the upper end portion of the unbonded PC steel material 28, and the upper PC steel material 14, .. Are connected to the sheaths 21, 21... Of the precast cylindrical body 5 while inserting the PC steel materials 14, 14... The body 5 is integrally coupled to the boundary portion precast tubular body 17.

〔他の形態例〕
(1)上記形態例では、塔断面が円形の場合について述べたが、塔断面が多角形状や楕円形状等、任意の断面形状に対して本発明は適用が可能である。
(2)上記形態例では、境界部プレキャスト筒状体９、１０、１１、１７に予めアンボンドＰＣ鋼材２８を埋設したが、他と同様にシース２１を埋設しておき、ＰＣ鋼材１４を挿通し定着するようにしてもよい。
(3)上記形態例においては、最下段ブロックＢ０は、２段の開口部付きプレキャスト筒状体１６，１６と、境界部プレキャスト筒状体１７の構成としたが、開口１８及び増厚部１９を有しないプレキャスト筒状体が前記境界部プレキャスト筒状体１７と開口部付きプレキャスト筒状体１６との間に介在されていてもよい。 [Other examples]
(1) In the above embodiment, the case where the tower cross section is circular has been described. However, the present invention can be applied to any cross section such as a polygonal cross section or an elliptical cross section.
(2) In the above embodiment, the unbonded PC steel material 28 is embedded in the boundary portion precast tubular bodies 9, 10, 11, 17 in advance, but the sheath 21 is embedded in the same manner as the others, and the PC steel material 14 is inserted. It may be fixed.
(3) In the above-described embodiment, the lowermost block B 0 has the configuration of the two-stage precast cylindrical bodies 16 and 16 with the opening and the boundary precast cylindrical body 17. A precast tubular body without 19 may be interposed between the boundary portion precast tubular body 17 and the precast tubular body 16 with an opening.

風力発電設備１の正面図である。1 is a front view of a wind power generation facility 1. FIG. タワー４のプレキャスト筒状体５〜８を示す、(A)は縦断面図、(B)は平面図（B-B線矢視図）、(C)は底面図（C-C線矢視図）である。The precast cylindrical bodies 5-8 of the tower 4 are shown, (A) is a longitudinal cross-sectional view, (B) is a plan view (BB line arrow view), (C) is a bottom view (CC line arrow view). . プレキャスト筒状体５（６、７、８）の緊結要領図である。It is a binding procedure diagram of the precast tubular body 5 (6, 7, 8). 境界部プレキャスト筒状体９（１０、１１）を示す、(A)は縦断面図、(B)は平面図（B-B線矢視図）、(C)は底面図（C-C線矢視図）である。The boundary part precast cylindrical body 9 (10, 11) is shown, (A) is a longitudinal sectional view, (B) is a plan view (BB line arrow view), (C) is a bottom view (CC line arrow view). It is. 境界部プレキャスト筒状体９（１０、１１）の緊結部構造を示す拡大縦断面図である。It is an expanded vertical sectional view which shows the binding part structure of the boundary part precast cylindrical body 9 (10, 11). (A)(B)は共に、境界部プレキャスト筒状体との接合例を示す縦断面図である。(A) (B) is a longitudinal cross-sectional view which shows the example of joining with a boundary part precast cylindrical body. ＰＣ鋼材をアウタータイプで配置した場合の要部縦断面図である。It is a principal part longitudinal cross-sectional view at the time of arrange | positioning PC steel materials by an outer type. 最下段ブロックＢ０に使用される開口部付きプレキャスト筒状体１６を示す、(A)は平面図、(B)は縦断面図(B-B線矢視図)である。It shows the apertured precast cylindrical body 16 which is used in the bottom block B 0, (A) is a plan view, a (B) is a vertical sectional view (BB view taken along line diagram). 境界部プレキャスト筒状体１７を示す、(A)は平面図、(B)は縦断面図（B-B線矢視図）である。The boundary part precast cylindrical body 17 is shown, (A) is a top view, (B) is a longitudinal cross-sectional view (BB line arrow view). 開口部付きプレキャスト筒状体１６の増厚部１９における接合拡大断面図である。It is a junction expanded sectional view in thickening part 19 of precast cylindrical body 16 with an opening. 増厚部１９における境界部プレキャスト筒状体１７部分の緊結部構造を示す拡大縦断面図である。FIG. 6 is an enlarged longitudinal sectional view showing a tightening portion structure of a boundary portion precast tubular body 17 portion in a thickened portion 19. 非増厚部における境界部プレキャスト筒状体１７部分の緊結部構造を示す拡大縦断面図である。It is an expanded longitudinal cross-sectional view which shows the binding part structure of the boundary part precast cylindrical body 17 part in a non-thickening part.

符号の説明Explanation of symbols

１…風力発電設備、２…回転翼、３…ナセル、４…タワー、５〜８…プレキャスト筒状体、９〜１１…境界部プレキャスト筒状体、１４…ＰＣ鋼材、１４Ａ…開口補強用ＰＣ鋼材、１６…開口部付きプレキャスト筒状体、１７…境界部プレキャスト筒状体、１８…開口部、１９…増厚部、２１…シース、２１ａ…シース拡径部、２４…アンカープレート、２５…ナット、２６・３３…カップラー、２８…アンボンドＰＣ鋼材、Ｂ０…最下段ブロック、Ｂ１〜Ｂ４…一般部ブロック DESCRIPTION OF SYMBOLS 1 ... Wind power generation equipment, 2 ... Rotor blade, 3 ... Nacelle, 4 ... Tower, 5-8 ... Precast cylindrical body, 9-11 ... Boundary part precast cylindrical body, 14 ... PC steel material, 14A ... PC for opening reinforcement Steel material, 16 ... Precast cylindrical body with opening, 17 ... Boundary portion precast cylindrical body, 18 ... Opening part, 19 ... Thickened part, 21 ... Sheath, 21a ... Expanded sheath part, 24 ... Anchor plate, 25 ... nut, 26, 33 ... coupler, 28 ... unbonded PC steel, B 0 ... lowermost block, B 1 .about.B 4 ... general unit block

Claims (3)

コンクリート製のプレキャスト筒状体を高さ方向に複数積み上げ、各プレキャスト筒状体をＰＣ鋼材により緊結し一体化を図った塔状構造物において、
前記塔状構造物を高さ方向に、１又は複数のプレキャスト筒状体毎にブロック分けし、各ブロック内では部材軸方向に同外径断面のプレキャスト筒状体を使用する条件の下で前記プレキャスト筒状体を積み上げ、高さ方向に段階的に外径寸法が縮小される変断面形状とするとともに、ブロック分けされた各境界部に、下段側プレキャスト筒状体とほぼ同じ外径寸法を有するとともに、上段側プレキャスト筒状体とほぼ同じ内径寸法を有する境界部プレキャスト筒状体を介在させ、
最下段のブロック以外では、下段側プレキャスト筒状体側から延長されるＰＣ鋼材を前記境界部プレキャスト筒状体の上面外周部に定着させるとともに、上段側プレキャスト筒状体側に延長されるＰＣ鋼材を前記境界部プレキャスト筒状体の下面内周部に定着させ、
最下段のブロックにおいて、前記境界部プレキャスト筒状体よりも下側に、周面の一部に開口部を有するとともに、この開口部より周方向に所定範囲に亘って他の部分よりも内周面側に増厚された増厚部を備えた１又は複数の開口部付きプレキャスト塔状体が配置され、基礎側から延長されるＰＣ鋼材を前記境界部プレキャスト筒状体の上面外周部に定着させるとともに、上段側プレキャスト筒状体側に延長されるＰＣ鋼材の内、前記増厚部に対応するＰＣ鋼材については基礎側に定着部を有し、前記増厚部を挿通させて上段側プレキャスト筒状体側に延長し、前記増厚部以外に配置されるＰＣ鋼材については前記境界部プレキャスト筒状体の下面内周部に定着し、上段側プレキャスト筒状体側に延長したことを特徴とするプレキャスト工法による変断面塔状構造物。 In a tower-shaped structure in which a plurality of precast cylindrical bodies made of concrete are stacked in the height direction, and each precast cylindrical body is tightly coupled with PC steel to achieve integration,
The tower-like structure is divided into blocks in the height direction for each of one or a plurality of precast cylindrical bodies, and the precast cylindrical body having the same outer diameter cross section is used in the member axial direction in each block. Precast cylindrical bodies are stacked to form a variable cross-sectional shape whose outer diameter dimension is reduced stepwise in the height direction, and the same outer diameter dimension as that of the lower-stage precast cylindrical body is formed on each boundary portion divided into blocks. And having a boundary precast tubular body having substantially the same inner diameter as the upper stage precast tubular body,
Except for the lowermost block, the PC steel material extended from the lower precast tubular body side is fixed to the outer peripheral portion of the upper surface of the boundary precast tubular body, and the PC steel material extended to the upper precast tubular body side is Fix it to the inner periphery of the lower surface of the boundary precast cylindrical body,
The lowermost block has an opening in a part of the peripheral surface below the boundary portion precast cylindrical body, and has an inner periphery from the other part over a predetermined range in the circumferential direction from the opening. Precast towers with one or more openings with a thickened part thickened on the surface side are arranged, and PC steel material extended from the foundation side is fixed to the outer peripheral part of the upper surface of the boundary part precast cylindrical body Among the PC steel materials extended to the upper precast cylindrical body side, the PC steel material corresponding to the thickened portion has a fixing portion on the base side, and the upper thickened precast tube is inserted through the thickened portion. PC steel material that extends to the side of the body and is arranged on the lower surface of the boundary part of the precast cylindrical body, and extends to the upper side of the precast cylindrical body. Construction method Variable cross-section in tower-like structure due. 前記プレキャスト筒状体において、外周側に配置されるＰＣ鋼材と、内周側に配置されるＰＣ鋼材とは千鳥状配置としてある請求項１記載のプレキャスト工法による変断面塔状構造物。   2. The variable cross-section tower structure according to claim 1, wherein the PC steel material disposed on the outer peripheral side and the PC steel material disposed on the inner peripheral side are arranged in a staggered manner in the precast cylindrical body. 前記最下段の境界部プレキャスト筒状体において、前記増厚部以外の上段側プレキャスト筒状体側に延長されるＰＣ鋼材としてアンボンドＰＣ鋼材を予め埋設し、最下段以外の境界部プレキャスト筒状体において、上段側プレキャスト筒状体側に延長されるすべてのＰＣ鋼材としてアンボンドＰＣ鋼材を予め埋設してある請求項１、２いずれかに記載のプレキャスト工法による変断面塔状構造物。   In the lowermost boundary part precast cylindrical body, an unbonded PC steel material is embedded in advance as a PC steel material extended to the upper stage side precast cylindrical body other than the thickened part, and in the boundary part precast cylindrical body other than the lowermost stage, An unbonded PC steel material is embedded in advance as all the PC steel material extended to the upper precast cylindrical body side, and the cross section tower structure by the precast method according to any one of claims 1 and 2.
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