JP5334379B2 - Hollow steel pipe reinforcement method for power transmission tower - Google Patents
Hollow steel pipe reinforcement method for power transmission tower Download PDFInfo
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- JP5334379B2 JP5334379B2 JP2007104447A JP2007104447A JP5334379B2 JP 5334379 B2 JP5334379 B2 JP 5334379B2 JP 2007104447 A JP2007104447 A JP 2007104447A JP 2007104447 A JP2007104447 A JP 2007104447A JP 5334379 B2 JP5334379 B2 JP 5334379B2
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- 229910000831 Steel Inorganic materials 0.000 title claims description 39
- 239000010959 steel Substances 0.000 title claims description 39
- 230000005540 biological transmission Effects 0.000 title claims description 29
- 238000000034 method Methods 0.000 title claims description 15
- 230000002787 reinforcement Effects 0.000 title claims description 6
- 239000004570 mortar (masonry) Substances 0.000 claims description 64
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 7
- 239000004800 polyvinyl chloride Substances 0.000 claims description 7
- 238000010276 construction Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 description 11
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 9
- 229920002554 vinyl polymer Polymers 0.000 description 9
- 229920001875 Ebonite Polymers 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000005429 filling process Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
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- Working Measures On Existing Buildindgs (AREA)
Description
本発明は、送電鉄塔用中空鋼管増強工法に関し、特に、中空鋼管により構成された送電用鉄塔を増強するものについてである。 TECHNICAL FIELD The present invention relates to a method for reinforcing a hollow steel pipe for a power transmission tower, and particularly to a method for enhancing a power transmission tower composed of a hollow steel pipe.
現地における中空鋼管鉄塔へのモルタル充填工法としては、鉄塔の下部からのモルタル圧入と鉄塔の上部からのモルタルの注入があったが、充填口の造設が困難、充填不良が発生する等の問題点があった。 As the mortar filling method for the hollow steel pipe tower in the field, there was mortar injection from the bottom of the tower and injection of mortar from the top of the tower, but it was difficult to construct the filling port and poor filling occurred. There was a point.
また、鉄塔の強度不足に対しては、強度が不足する箇所の部材の交換や、溶接補修、また部材交換が不可能な主柱材等の強度不足の際は、鉄塔建て替えとなる場合もあり、高コストとなっていた。
中空鋼管により構成された送電鉄塔を、安価に増強できることが求められている。 It is demanded that a power transmission tower composed of hollow steel pipes can be inexpensively increased.
そこで、本発明は、上記の事情に鑑み、中空鋼管により構成された送電鉄塔を安価に、増強できるようにすべく、ゴムホースを用いてモルタルを送電鉄塔上部のホッパーに送るモルタル上部送り工程と、モルタル上部送り工程により送られてきたモルタルをホッパー下部に接続されたポリ塩化ビニールホースを用いて中空鋼管内に充填させるモルタル充填工程と、有し、モルタル充填工程では、送電鉄塔の最下部からモルタルの骨材が分離しない規定高さ位置毎にポリ塩化ビニールホースのみを上昇させながら止めて、中空鋼管内にモルタルを充填させるようにしたものである。
Therefore, in view of the above circumstances, the present invention is a mortar upper feed step for sending a mortar to a hopper at the top of the power transmission tower using a rubber hose so that the power transmission tower constituted by the hollow steel pipe can be inexpensively increased. A mortar filling step of filling the hollow steel pipe with the mortar sent by the mortar upper feed step into the hollow steel pipe using a polyvinyl chloride hose connected to the lower portion of the hopper, and in the mortar filling step, the mortar is started from the bottom of the transmission tower. The hollow hose is filled with mortar by stopping and raising only the PVC hose at each specified height position where the aggregate of the steel is not separated.
本発明は、ゴムホースを用いてモルタルを送電鉄塔上部のホッパーに送るモルタル上部送り工程と、モルタル上部送り工程により送られてきたモルタルをホッパー下部に接続されたポリ塩化ビニールホースを用いて中空鋼管内に充填させるモルタル充填工程と、有し、モルタル充填工程では、送電鉄塔の最下部からモルタルの骨材が分離しない規定高さ位置毎にポリ塩化ビニールホースのみを上昇させながら止めて、中空鋼管内にモルタルを充填させるようにしているので、中空鋼管により構成された送電鉄塔を安価に、増強することができる。 The present invention relates to a mortar upper feed process in which a mortar is sent to a hopper at the upper part of a transmission tower using a rubber hose, and a mortar sent in the mortar upper feed process is used in a hollow steel pipe using a PVC hose connected to the hopper lower part. In the mortar filling process, in the hollow mortar filling process, only the PVC hose is raised and stopped at every specified height position where the aggregate of the mortar does not separate from the bottom of the transmission tower. Since the mortar is filled in the power transmission tower, the power transmission tower composed of the hollow steel pipe can be enhanced at a low cost.
本発明は、主柱材の上下端に固着したフランジにボルトを挿通させナットで螺締した中空鋼管のフランジの隙間からモルタルが漏れ無いよう対策を行った送電用鉄塔へ上部より無収縮高流動モルタルを充填することにより、鉄塔強度を向上させる送電鉄塔用中空鋼管増強工法である。 The present invention is a non-shrinking high flow from the top to a power transmission tower in which mortar is prevented from leaking through a gap in a flange of a hollow steel pipe that is inserted into a flange fixed to the upper and lower ends of a main pillar member and screwed with a nut. It is a hollow steel pipe reinforcement construction method for a power transmission tower that improves the steel tower strength by filling mortar.
本発明を添付する図面に示す具体的実施例に基づき、以下詳細に説明する。 The present invention will be described in detail below based on specific embodiments shown in the accompanying drawings.
本発明の送電鉄塔用中空鋼管への無収縮高流動モルタル (以下、単に「モルタル」という。) の充填作業手順を、図１〜図６により説明する。 The procedure for filling the hollow steel pipe for power transmission tower of the present invention with non-shrinking high-flow mortar (hereinafter simply referred to as “mortar”) will be described with reference to FIGS.
実施例の送電用鉄塔は、５節の中空鋼管より構成される。下部より第５節目の上部には四角錐形状の架空地線用のアーム（以下、「グランドアーム」という。）が取付けられている。各節間はフランジを当接させ、ボルトを挿通させ、ナットで螺締している。 The power transmission tower of the example is composed of a five-section hollow steel pipe. A quadrangular pyramid-shaped arm (hereinafter referred to as a “ground arm”) is attached to the upper part of the fifth node from the lower part. A flange is brought into contact between each node, a bolt is inserted, and screwed with a nut.
モルタルを、充填しようとする中空鋼管（第５節の主柱材）の上部開口に注入できるようにするために、図１のようにグランドアームを移動させ、図２のようにホッパーを第５節の主柱材の上部開口上に固着する。 In order to be able to inject mortar into the upper opening of the hollow steel pipe to be filled (the main column member of Section 5), the ground arm is moved as shown in FIG. 1, and the hopper is moved as shown in FIG. It is fixed on the upper opening of the main pillar material of the knot.
鉄塔敷には、ミキサーで十分攪拌したモルタルを収容するホッパーと、そのモルタルを圧送するモルタルポンプを配置する。 On the steel tower, a hopper that contains mortar sufficiently stirred by a mixer and a mortar pump that pumps the mortar are arranged.
ゴムホースを鉄塔最上部まで延ばし、ゴムホースの上部開口を鉄塔上のホッパー上に位置させる。 Extend the rubber hose to the top of the tower and place the upper opening of the rubber hose on the hopper on the tower.
ホッパー下部にはモルタルを主柱材に充填させるため、ポリ塩化ビニールホース（以下「ビニールホース」という。）を接続する。 A PVC hose (hereinafter referred to as “vinyl hose”) is connected to the lower part of the hopper in order to fill the main pillar with mortar.
ビニールホースは、最下節部の主柱材にモルタルを充填させるため、最下節部の主柱材の上部開口に位置する長さとする。 The vinyl hose has a length located at the upper opening of the main pillar material of the lowermost node part in order to fill the main pillar material of the lowermost node part with mortar.
送電鉄塔は、通常４本（Ａ、Ｂ、Ｃ、Ｄ）の主柱材より構成される。 The power transmission tower is usually composed of four (A, B, C, D) main pillar materials.
充填作業は、一脚ずつの充填とする。 The filling operation is a single leg filling.
まず、図２に示すように、主柱材へのビニールホースの挿入は、骨材分離しない規定の高低差となるよう行い、最下節部のモルタル充填を行う。 First, as shown in FIG. 2, the insertion of the vinyl hose into the main pillar material is performed so as to have a specified height difference that does not separate the aggregate, and the mortar filling of the lowermost node portion is performed.
モルタル充填がビニールホース下端位置まで達したところで、ビニールホースを規定高さまで引き上げ、図３，図４，図５に示すように順次モルタルを充填する。 When the mortar filling reaches the lower end position of the vinyl hose, the vinyl hose is pulled up to a specified height, and the mortar is sequentially filled as shown in FIGS.
最上節部については図６に示すようにビニールホースを全て引き上げ、ホッパーより直接モルタル充填を行い、最上面まで仕上げる。 As for the uppermost node, as shown in FIG. 6, all the vinyl hoses are pulled up, and mortar is filled directly from the hopper to finish the uppermost surface.
本発明に使用するモルタルは、高い位置から流し込み、均質に仕上げることを前提としており、使用するモルタルにはセメント、細骨材、水に加え、適切な混和材を入れることにより分離抵抗性ならびに高流動性を付与する必要がある。今回使用したモルタルはスランプフロー２５〜３５ｃｍ程度となるよう混和材により調整し、流動性をある程度確保しつつ材料分離抵抗を向上させている。さらに、膨張材を添加することで、収縮による隙間をなくす必要がある。 The mortar used in the present invention is premised on pouring from a high position and finishing it uniformly. In addition to cement, fine aggregate and water, the mortar to be used is mixed with an appropriate admixture and has high resistance to separation. It is necessary to provide fluidity. The mortar used this time is adjusted with an admixture so that the slump flow is about 25 to 35 cm, and the material separation resistance is improved while ensuring fluidity to some extent. Furthermore, it is necessary to eliminate a gap due to shrinkage by adding an expansion material.
但し、過度な膨張は鋼管損傷に至る原因となることから、その量については硬化時の収縮量と膨張量が均衡するよう調整することが必要である。また、コンクリート・モルタル充填鋼管としての強度上昇を期待するため、水セメント比は５０％以下とする必要がある。 However, since excessive expansion causes damage to the steel pipe, it is necessary to adjust the amount so that the amount of shrinkage and the amount of expansion at the time of hardening are balanced. Moreover, in order to expect an increase in strength as a concrete / mortar filled steel pipe, the water cement ratio needs to be 50% or less.
本発明を実施する上で、以下の課題について検討することとした。 In carrying out the present invention, the following problems were examined.
中空鋼管鉄塔の主柱材は上下端に固着したフランジにボルトを挿通させ、ナットで螺締して連結している。モルタル充填時、総充填高さ、モルタル比重から求められる圧力が主柱材内に発生するためフランジのボルト・ナット部からの漏れ防止対策としては図７に示すようにシールワッシャーを採用し、フランジ側面からの漏れ防止対策としては図８に示すように、すべてのフランジの側面にコーキング剤を塗布し、その上にビニールテープを巻き付けるようにした。 The main pillar material of the hollow steel pipe tower is connected by inserting bolts through flanges fixed to the upper and lower ends and screwing them with nuts. When filling the mortar, the pressure required from the total filling height and the specific gravity of the mortar is generated in the main column material. As a measure to prevent leakage from the bolts and nuts of the flange, a seal washer as shown in Fig. 7 is used. As a measure for preventing leakage from the side surface, as shown in FIG. 8, a caulking agent was applied to the side surfaces of all the flanges, and a vinyl tape was wrapped around it.
高低差の大きい環境でのモルタル充填の作業性は、モルタル練り待ちによるモルタルポンプの長時間停止によりホース内のモルタル硬化が進む上、軟質のビニールホースでは内部圧力変化による変形が起こることによりモルタルが詰まり、作業時間の多大なロスとなる。そこで、モルタルの練り待ちを無くすため使用モルタル量に合わせた適正なミキサーの配置を行うこととし、ホースは変形しない硬質ゴム製ホースを使用することにした。 The workability of mortar filling in an environment with a large difference in height is that mortar hardening progresses by stopping the mortar pump for a long time due to waiting for mortar kneading, and in addition, deformation of the soft vinyl hose occurs due to changes in internal pressure. Clogging and a significant loss of work time. Therefore, in order to eliminate the waiting time for mortar kneading, we decided to arrange an appropriate mixer according to the amount of mortar used, and decided to use a hard rubber hose that does not deform.
但し、硬質ゴムホースは柔軟性がないので主柱材への挿入が不可能であるため、ホッパーとビニールホースを併用することとした。 However, since the hard rubber hose is not flexible and cannot be inserted into the main pillar material, a hopper and a vinyl hose are used in combination.
本発明の施工品質は、無収縮高流動モルタルを使用するため主柱材、斜部材に至るまで隙間なく充填でき、硬化後の沈下量も少ない。 Since the construction quality of the present invention uses a non-shrinkable high-fluidity mortar, it can be filled without gaps up to the main pillar material and the diagonal member, and the amount of settlement after curing is small.
また、本発明の無収縮高流動モルタルは４０Ｎ／ｍｍ2 以上の圧縮強度を有する。 The non-shrinking high flow mortar of the present invention has a compressive strength of 40 N / mm @ 2 or more.
また、本発明の無収縮高流動モルタルの密度、比重、供試験体の充填状況、供試験体側面の状況についても良好である。 Further, the density, specific gravity, filling condition of the test specimen, and the situation of the side face of the specimen are also good.
実施例の送電鉄塔は５節の中空鋼管で構成され、高さ約３０ｍである。 The power transmission tower of the embodiment is composed of a five-section hollow steel pipe and has a height of about 30 m.
本発明は、送電鉄塔用中空鋼管の増強工法に関するものであるが、通信鉄塔用中空鋼管の増強工法にも利用できる。 Although this invention relates to the reinforcement construction method of the hollow steel pipe for power transmission towers, it can be utilized also for the reinforcement construction method of the hollow steel pipe for communication towers.
Claims (1)
ゴムホースを用いてモルタルを送電鉄塔上部のホッパーに送るモルタル上部送り工程と、
該モルタル上部送り工程により送られてきたモルタルを前記ホッパー下部に接続されたポリ塩化ビニールホースを用いて中空鋼管内に充填させるモルタル充填工程と、有し、
該モルタル充填工程では、送電鉄塔の最下部からモルタルの骨材が分離しない規定高さ位置毎に前記ポリ塩化ビニールホースのみを上昇させながら止めて、中空鋼管内にモルタルを充填させることを特徴とする送電鉄塔用中空鋼管増強工法。
In the hollow steel pipe reinforcement construction method for power transmission towers of the transmission tower, measures were taken to prevent leakage of mortar from the gaps in the flanges of the hollow steel pipes that were screwed into the flanges fixed to the upper and lower ends of the hollow steel pipes and screwed with nuts.
Mortar top feed process that sends mortar to the hopper at the top of the transmission tower using a rubber hose,
A mortar filling step of filling the hollow steel pipe with the mortar sent by the mortar upper feeding step into a hollow steel pipe using a polyvinyl chloride hose connected to the lower portion of the hopper,
In the mortar filling step, the hollow steel pipe is filled with mortar by stopping and raising only the polyvinyl chloride hose at every specified height position where the aggregate of the mortar does not separate from the lowest part of the transmission tower. A hollow steel pipe reinforcement method for power transmission towers.
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| JP2007104447A JP5334379B2 (en) | 2007-04-12 | 2007-04-12 | Hollow steel pipe reinforcement method for power transmission tower |
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| JP2007104447A JP5334379B2 (en) | 2007-04-12 | 2007-04-12 | Hollow steel pipe reinforcement method for power transmission tower |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103993773A (en) * | 2014-05-26 | 2014-08-20 | 江苏神马电力股份有限公司 | Composite cross arm and power transmission tower with same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101781937B (en) * | 2010-03-11 | 2011-05-25 | 同济大学 | Ice-resisting and strengthening reconstruction method of existing power transmission tower |
| CN102767293B (en) * | 2012-08-07 | 2015-07-22 | 广东电网公司佛山供电局 | Strengthening method for power transmission tower on hazardous area of landslide |
| CN113027218A (en) * | 2021-03-20 | 2021-06-25 | 中电建十一局工程有限公司 | Novel special mould is consolidated to communication tower |
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| JPS5146974B1 (en) * | 1967-12-23 | 1976-12-11 | ||
| JPS62147189A (en) * | 1985-12-20 | 1987-07-01 | 東海ゴム工業株式会社 | Rubber hose for force-feeding ready-mixed concrete |
| JPH05272240A (en) * | 1992-03-25 | 1993-10-19 | Fujita Corp | Concrete placing method for packed steel tube concrete column |
| JPH10121727A (en) * | 1996-10-24 | 1998-05-12 | Daisue Kensetsu Kk | Concrete bucket |
| JP2001040876A (en) * | 1999-07-30 | 2001-02-13 | Maeda Corp | Concrete filling method in steel pipe column |
| JP2003003567A (en) * | 2001-06-20 | 2003-01-08 | Nkk Corp | Work execution method for steel pipe column filled with concrete |
| JP2004084437A (en) * | 2002-08-26 | 2004-03-18 | Fukumoto Kogyo Kk | Method of hermetically sealing bolted portions of steel pipe joint for steel tower structure |
| JP2004084436A (en) * | 2002-08-26 | 2004-03-18 | Fukumoto Kogyo Kk | Method of hermetically sealing flange butting portions of steel pipe joint for steel tower structure |
| JP2005337485A (en) * | 2004-04-05 | 2005-12-08 | Hironobu Kuroda | Connection means for construction, and nut fixing hardware, jaw type nut, anchor bolt, clamping ring, and washer used for the connection means |
| JP2006298662A (en) * | 2005-04-15 | 2006-11-02 | Ube Ind Ltd | Grout composition and working method of grout slurry |
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| CN103993773A (en) * | 2014-05-26 | 2014-08-20 | 江苏神马电力股份有限公司 | Composite cross arm and power transmission tower with same |
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