JP2012172295A - Reinforcement method of steel tower for power transmission - Google Patents

Reinforcement method of steel tower for power transmission Download PDF

Info

Publication number
JP2012172295A
JP2012172295A JP2011031730A JP2011031730A JP2012172295A JP 2012172295 A JP2012172295 A JP 2012172295A JP 2011031730 A JP2011031730 A JP 2011031730A JP 2011031730 A JP2011031730 A JP 2011031730A JP 2012172295 A JP2012172295 A JP 2012172295A
Authority
JP
Japan
Prior art keywords
foundation
inverted
power transmission
reinforcing
constructed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2011031730A
Other languages
Japanese (ja)
Other versions
JP5679305B2 (en
Inventor
Shuji Wada
収司 和田
Hiroyuki Takeishi
裕幸 武石
Shigeru Tanabe
成 田邉
Yoshiki Mori
欣樹 森
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tokyo Electric Power Company Holdings Inc
Original Assignee
Tokyo Electric Power Co Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tokyo Electric Power Co Inc filed Critical Tokyo Electric Power Co Inc
Priority to JP2011031730A priority Critical patent/JP5679305B2/en
Publication of JP2012172295A publication Critical patent/JP2012172295A/en
Application granted granted Critical
Publication of JP5679305B2 publication Critical patent/JP5679305B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Foundations (AREA)
  • Working Measures On Existing Buildindgs (AREA)

Abstract

PROBLEM TO BE SOLVED: To prevent a steel tower for power transmission installed in a mountain region from being broken or brought down by slope collapse caused by an earthquake or concentrated torrential rainfall or the like, and to simultaneously reinforce a foundation and a steel tower just by a construction inside a landed property.SOLUTION: In a reinforcement method of a steel tower 1 for power transmission, which is built in a mountain region and comprises a steel tower truss 2 and four inverse T shape foundations 3A-3D supporting the steel tower truss 2, a caisson type pile foundation 5 is built inside a landed property where the steel tower 1 for power transmission is built, inside an area surrounded by the four inverse T shape foundations for instance, and reinforcement steel materials 6, 6... connecting the caisson type pile foundation 5 and the steel tower truss 2 are provided.

Description

本発明は、山岳地に設置された送電用鉄塔が地震、集中豪雨などによって引き起こされた斜面崩壊によって、破損したり倒壊したりするのを防止するための鉄塔の補強方法に関する。   The present invention relates to a method for reinforcing a steel tower for preventing a power transmission tower installed in a mountainous area from being damaged or collapsed due to a slope failure caused by an earthquake or a heavy rain.

図７に示されるように、送電用鉄塔５０が山岳地に建設される場合、一般的には支持地盤が比較的浅い位置から出現するため、逆Ｔ型基礎５１が多く採用されてきた。この逆Ｔ型基礎５１は、経済性や施工性の面で優れる反面、地震や集中豪雨によって斜面崩壊が起きると、基礎が変位したり、地山が地滑りによって流亡した場合は基礎としての機能を完全に失い、鉄塔が破損したり最悪の場合は鉄塔が倒壊する危険性があった。   As shown in FIG. 7, when the power transmission tower 50 is constructed in a mountainous area, generally, the support ground appears from a relatively shallow position, and thus the inverted T-type foundation 51 has been widely used. The inverted T-type foundation 51 is excellent in terms of economy and workability, but if the slope collapses due to an earthquake or torrential rain, the foundation will be displaced, or if the ground is washed away by a landslide, it will function as a foundation. There was a risk that the tower would be completely lost and the tower would be damaged or, in the worst case, the tower could collapse.

一方、斜面の崩壊を防止する地滑り対策工として、従来よりアンカー法枠工法や、抑止杭工法などが知られている。前者のアンカー法枠工法は、図８に示されるように、地山面に法枠５２を構築するとともに、この法枠５２を多数のアンカー５３，５３…によって地山に固定するものであり、後者の抑止杭工法は、図９に示されるように、送電用鉄塔５０の谷側地山に多数の抑止杭５４，５４を列設するものである。   On the other hand, as a landslide countermeasure method for preventing the collapse of the slope, an anchor method frame method, a deterrent pile method, and the like are conventionally known. As shown in FIG. 8, the former anchor method frame construction method constructs a method frame 52 on the natural ground surface, and fixes the method frame 52 to the natural ground by a number of anchors 53, 53. In the latter deterrent pile method, as shown in FIG. 9, a large number of deterred piles 54, 54 are arranged on the valley side ground of the power transmission tower 50.

他方、送電用鉄塔に対応した補強方法も種々提案されている。例えば、下記特許文献１では、送電用鉄塔を嵩上げによって基礎の補強が必要になった場合に、鉄塔の脚を支持するため、該脚先端位置の四角形の頂点位置にそれぞれ設けられた４個の基礎を有する送電線用鉄塔において、前記四角形の対角線上で前記基礎の外側位置に補助基礎を設け、該補助基礎に前記鉄塔を補強する補助脚を支持させた送電線用鉄塔の補強方法が提案されている。   On the other hand, various reinforcing methods corresponding to power transmission towers have been proposed. For example, in Patent Document 1 below, when the foundation of the power transmission tower needs to be reinforced by raising the floor, the four legs respectively provided at the apex positions of the squares of the leg tip positions are used to support the legs of the tower. In a transmission line tower having a foundation, a method for reinforcing a transmission line tower is proposed in which an auxiliary foundation is provided at an outer position of the foundation on the rectangular diagonal line, and an auxiliary leg for reinforcing the tower is supported on the auxiliary foundation. Has been.

特開２００４−３００８７２号公報Japanese Patent Laid-Open No. 2004-300872

しかしながら、前記地滑り対策工は、民地境界線を越えた外側の広範囲に亘って対策工を講じる必要があり、施工コストが膨大となる、土地所有者との交渉が難航する場合がある、新たな伐採や土地改変を伴うため他の二次災害が懸念されるなどの問題があった。また、これらは地山に地滑り対策を施すものであり、基礎を直接的に補強するものではないため、地山補強、鉄塔補強の一体として効果が把握しづらいなどの問題があった。   However, the landslide countermeasure work needs to be taken over a wide area outside the private boundary, and the construction cost becomes enormous. Negotiation with the land owner may be difficult. There were problems such as fear of other secondary disasters due to the need for logging and land modification. In addition, these are countermeasures against landslides on natural ground, and do not directly reinforce the foundation, so there are problems such as it is difficult to grasp the effect as an integral part of natural ground reinforcement and steel tower reinforcement.

また、前記特許文献１に係る補強方法は、基礎の補強と鉄塔の補強とが同時に行える点で望ましいものであるが、補助基礎として逆Ｔ型基礎を設けるものであり、斜面崩壊に対する補強としての効果が期待できない。また、追加された補助脚や補助基礎は、現存の鉄塔に対して新たに増加された分の荷重に対してのみ機能するものであり、工事規模の割りに補強効果が低い。更に、山岳地の斜面に建設された基礎の場合、谷側の基礎の外側に新たに直接基礎を構築することは支持層との関係で実質的に不可能か困難である場合が多いとともに、既設基礎の外側に直接基礎を構築する場合は、民地境界線を越えることとなり土地所有者との交渉が必要になるなどの問題があった。   Moreover, although the reinforcement method which concerns on the said patent document 1 is desirable in the point which can perform reinforcement of a foundation and reinforcement of a steel tower simultaneously, it provides an inverted T type foundation as an auxiliary foundation, and is used as reinforcement with respect to slope collapse. The effect cannot be expected. Further, the added auxiliary legs and auxiliary foundations function only for the newly increased load with respect to the existing steel tower, and the reinforcement effect is low for the construction scale. Furthermore, in the case of foundations constructed on the slopes of mountainous areas, it is often impossible or difficult to construct a new foundation directly outside the foundation on the valley side in relation to the support layer, When building the foundation directly outside the existing foundation, there were problems such as crossing the private boundary and necessitating negotiations with landowners.

そこで本発明の主たる課題は、山岳地に設置された送電用鉄塔が地震、集中豪雨などによって引き起こされた斜面崩壊によって破損したり倒壊したりするのを防止することにある。また、所有地内での工事で済むとともに、基礎と鉄塔とを同時に補強が行える送電用鉄塔の補強方法を提供することにある。   Therefore, a main problem of the present invention is to prevent a power transmission tower installed in a mountainous area from being damaged or collapsed by a slope collapse caused by an earthquake, a heavy rain, or the like. It is another object of the present invention to provide a method for reinforcing a transmission tower that can be reinforced at the same time as the foundation and the tower.

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、山岳地に建設されるとともに、鉄塔トラスとこれを支持する４つの逆Ｔ型基礎とからなる送電用鉄塔の補強方法であって、
前記送電用鉄塔が構築された所有地内に深礎基礎又は杭基礎を構築し、この深礎基礎又は杭基礎と鉄塔トラスとを連結する補強鋼材を設けることを特徴とする送電用鉄塔の補強方法が提供される。 In order to solve the above-mentioned problems, the present invention according to claim 1 is a method for reinforcing a power transmission tower constructed of a tower truss and four inverted T-type foundations, which is constructed in a mountainous area and supports the truss.
A method for reinforcing a power transmission tower, comprising constructing a deep foundation or pile foundation in the property where the power transmission tower is constructed, and providing a reinforcing steel material for connecting the deep foundation or pile foundation and a steel tower truss. Is provided.

上記請求項１記載の発明は、送電用鉄塔が構築された所有地内に深礎基礎又は杭基礎を構築し、この深礎基礎又は杭基礎と鉄塔トラスとを連結する補強鋼材を設けるものである。従って、地震や集中豪雨により既設基礎に変位が生じると、応力的均衡を取るように前記補強鋼材に応力が導入されるとともに、深礎基礎又は杭基礎に荷重が伝達され、送電用鉄塔の破損や倒壊を防止するように機能する。前記深礎基礎は地滑り抑止杭としても効果も期待することができるとともに、斜面崩壊が発生しても大きく変位したりすることがないため、鉄塔の破損や倒壊を確実に防止することができる。更に、本対策工は、所有地内に深礎基礎又は杭基礎を構築するものであるから、周知の土地所有者との調整も不要か工事中の一時的借用で済むようになる。更に、地山と共に鉄塔を同時に補強できるため、補強効果も把握し易くなる。   The invention of claim 1 is to construct a deep foundation or pile foundation in the property where the transmission tower is constructed, and to provide a reinforcing steel material for connecting the deep foundation or pile foundation and the steel truss. . Therefore, when an existing foundation is displaced due to an earthquake or heavy rain, stress is introduced into the reinforcing steel so as to achieve a stress balance, and the load is transmitted to the deep foundation or pile foundation, causing damage to the transmission tower. Function to prevent or collapse. The deep foundation can be expected to have an effect as a landslide deterrent pile, and even if a slope collapse occurs, it will not be displaced greatly, so that the steel tower can be reliably prevented from being damaged or collapsed. Furthermore, since this countermeasure work is to construct a deep foundation or pile foundation in the property, it is not necessary to coordinate with a well-known land owner or it can be temporarily borrowed during construction. Furthermore, since the steel tower can be reinforced at the same time as the natural ground, the reinforcing effect can be easily grasped.

請求項２に係る本発明として、前記深礎基礎又は杭基礎は、前記４つの逆Ｔ型基礎に囲まれた領域内に構築する請求項１記載の送電用鉄塔の補強方法が提供される。   As the present invention according to claim 2, there is provided a method for reinforcing a power transmission tower according to claim 1, wherein the deep foundation or the pile foundation is constructed in a region surrounded by the four inverted T-type foundations.

請求項３に係る本発明として、前記深礎基礎又は杭基礎は、前記４つの逆Ｔ型基礎の内、谷側に位置する２つの逆Ｔ型基礎に対し、その谷側に構造的に一体的に挙動するように構築する請求項１記載の送電用鉄塔の補強方法が提供される。   As the present invention according to claim 3, the deep foundation or the pile foundation is structurally integrated on the valley side with respect to two inverted T-type foundations located on the valley side among the four inverted T-type foundations. A method for reinforcing a power transmission tower according to claim 1, which is constructed so as to behave dynamically.

請求項４に係る本発明として、前記深礎基礎又は杭基礎は、前記４つの逆Ｔ型基礎の内、谷側に位置する２つの逆Ｔ型基礎の中間付近に構築する請求項１記載の送電用鉄塔の補強方法が提供される。   As the present invention according to claim 4, the deep foundation or pile foundation is constructed near the middle of two inverted T-type foundations located on the valley side among the four inverted T-type foundations. A method for reinforcing a transmission tower is provided.

請求項５に係る本発明として、前記深礎基礎又は杭基礎は、前記４つの逆Ｔ型基礎の内、谷側に位置する１つの逆Ｔ型基礎に対し、該逆Ｔ型基礎を跨ぐように左右対で構築する請求項１記載の送電用鉄塔の補強方法が提供される。   As this invention which concerns on Claim 5, the said deep foundation foundation or a pile foundation straddles this reverse T type | mold foundation with respect to one reverse T type | mold foundation located in the trough side among the said four inverted T type | mold foundations. A method for reinforcing a power transmission tower according to claim 1 is provided.

請求項６に係る本発明として、前記深礎基礎又は杭基礎は、前記４つの逆Ｔ型基礎の各中間位置に構築する請求項１記載の送電用鉄塔の補強方法が提供される。   As the present invention according to claim 6, there is provided a method for reinforcing a power transmission tower according to claim 1, wherein the deep foundation or the pile foundation is constructed at each intermediate position of the four inverted T-type foundations.

上記請求項１〜６記載の各発明は、各実施態様例を具体的に示したものである。これらの各補強方法は送電用鉄塔の建設状況や地山状況などを総合的に勘案した上で適切な方法が選択される。   Each invention described in claims 1 to 6 specifically shows each embodiment example. For each of these reinforcing methods, an appropriate method is selected after comprehensively considering the construction status of the power transmission tower and the ground conditions.

請求項７に係る本発明として、前記深礎基礎又は杭基礎の頭部と、前記４つの逆Ｔ型基礎の頂部とを結合する梁鋼材を設ける請求項２記載の送電用鉄塔の補強方法が提供される。   As the present invention according to claim 7, there is provided a method for reinforcing a power transmission tower according to claim 2, wherein a beam steel material is provided for connecting the head of the deep foundation or pile foundation and the tops of the four inverted T-type foundations. Provided.

上記請求項７記載の方法は、前記深礎基礎又は杭基礎の頭部と、前記４つの逆Ｔ型基礎の頂部とを結合する梁鋼材を設けるようにするものであり、これによって、各逆Ｔ型基礎３Ｃ〜３Ｄを一体的に補強できるとともに、地山が軟弱な場合に、変位抑制、加速度増加に対して効果が期待できる。   The method according to claim 7 is to provide a beam steel material for connecting the head of the deep foundation or pile foundation and the tops of the four inverted T-type foundations. The T-shaped foundations 3C to 3D can be integrally reinforced, and when the natural ground is soft, an effect can be expected for displacement suppression and acceleration increase.

以上詳説のとおり本発明によれば、山岳地に設置された送電用鉄塔が地震、集中豪雨などによって引き起こされた斜面崩壊によって、破損したり倒壊したりするのを防止できる。また、所有地内での工事で済むとともに、基礎と鉄塔とを同時に補強が行えるようになる。   As described above in detail, according to the present invention, it is possible to prevent a power transmission tower installed in a mountainous area from being damaged or collapsed due to a slope collapse caused by an earthquake or a heavy rain. Moreover, the construction within the property is sufficient and the foundation and the steel tower can be reinforced at the same time.

本発明の第１形態例に係る補強態様を示す、(A)は側面図、(B)は平面図である。The reinforcement aspect which concerns on the 1st form example of this invention is shown, (A) is a side view, (B) is a top view. 本発明の第１形態例に係る補強態様を示す、(A)は側面図、(B)は平面図である。The reinforcement aspect which concerns on the 1st form example of this invention is shown, (A) is a side view, (B) is a top view. 本発明の第１形態例に係る補強態様を示す、(A)は側面図、(B)は平面図である。The reinforcement aspect which concerns on the 1st form example of this invention is shown, (A) is a side view, (B) is a top view. 本発明の第１形態例に係る補強態様を示す、(A)は側面図、(B)は平面図である。The reinforcement aspect which concerns on the 1st form example of this invention is shown, (A) is a side view, (B) is a top view. 本発明の第１形態例に係る補強態様を示す、(A)は側面図、(B)は平面図である。The reinforcement aspect which concerns on the 1st form example of this invention is shown, (A) is a side view, (B) is a top view. 本発明の第１形態例に係る補強態様を示す、(A)は側面図、(B)は平面図である。The reinforcement aspect which concerns on the 1st form example of this invention is shown, (A) is a side view, (B) is a top view. 山岳地送電用鉄塔の斜面崩壊を示す側面図である。It is a side view showing slope collapse of a mountainous power transmission tower. 地滑り対策工（その１）を示す施工図である。It is a construction drawing which shows landslide countermeasure work (the 1). 地滑り対策工（その２）を示す施工図である。It is a construction drawing showing landslide countermeasure work (part 2).

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.

本発明に係る送電用鉄塔の補強方法は、例えば図１に示されるように、山岳地に建設されるとともに、鉄塔トラス２とこれを支持する４つの逆Ｔ型基礎３Ａ〜３Ｄとからなる送電用鉄塔１を対象として、前記送電用鉄塔１が構築された所有地内に深礎基礎５を構築し、この深礎基礎５と鉄塔トラスとを連結する補強鋼材６，６…を設けるものである。   The method for reinforcing a power transmission tower according to the present invention is constructed in a mountainous area as shown in FIG. 1, for example, and includes a steel tower truss 2 and four inverted T-type foundations 3A to 3D that support the truss. For the steel tower 1, the foundation foundation 5 is constructed in the property where the power transmission tower 1 is constructed, and reinforcing steel materials 6, 6... Connecting the foundation foundation 5 and the steel tower truss are provided. .

以下、更に具体的に詳述する。   This will be described in more detail below.

同図１に示されるように、山岳地に建設される送電用鉄塔１の場合は、支持層が比較的浅い位置に存在していることが多く、鉄塔トラス２を支持する４つの基礎３Ａ〜３Ｄの形式としては、逆Ｔ型基礎が多く採用されてきた。そのため、地震や集中豪雨によって斜面崩壊が発生し、これらの逆Ｔ型基礎３Ａ〜３Ｄを支持している地山が流亡して逆Ｔ型基礎３Ｂ、３Ｃが大きく変位することが懸念されていた。逆Ｔ型基礎３Ｂ、３Ｃが大きく変位すると、鉄塔トラス２に過大な応力が発生し、座屈や変形が起こったり、最悪の場合は逆Ｔ型基礎３Ｂ、３Ｃが転倒して送電用鉄塔１が倒壊し、大きな停電被害を被ることになる。   As shown in FIG. 1, in the case of a power transmission tower 1 constructed in a mountainous area, the support layer often exists at a relatively shallow position, and the four foundations 3 </ b> A to support the steel tower truss 2. As a 3D format, an inverted T-type foundation has been adopted in many cases. For this reason, there has been a concern that slope failures will occur due to earthquakes and torrential rain, and that the natural ground supporting these inverted T-type foundations 3A to 3D will be washed away and the inverted T-type foundations 3B and 3C will be greatly displaced. . If the inverted T-type foundations 3B and 3C are greatly displaced, an excessive stress is generated in the steel tower truss 2, causing buckling or deformation, or in the worst case, the inverted T-type foundations 3B and 3C are overturned to cause the transmission tower 1 to fall. Collapsed and suffered major power outage damage.

そこで本発明では、このような山岳地に建設された送電用鉄塔１を対象として、仮に斜面崩壊が発生しても、送電用鉄塔１の倒壊を防止し、被害を最小限に抑えるようにするとともに、特に地震時は基礎にも大きな加速度が働き、鉄塔１が地山とは別の挙動をすることが考えられるため、鉄塔と基礎とを同時に補強するものとする。また、逆Ｔ型基礎３Ａ〜３Ｄから外側に約１〜２ｍの範囲は、自己所有地内（民地境界４の内側）となっており、この所有地を越えた範囲に補強工を施す場合は、土地所有者からの譲渡又は借地契約が必要となり、交渉が難航したりすることが考えられるとともに、新たな伐採や土地改変に伴い他の二次災害が懸念される場合があるため、所有地内での補強工とするものである。   Therefore, in the present invention, even if a slope collapse occurs, the transmission tower 1 is prevented from being collapsed and the damage is minimized, even if a slope collapse occurs, targeting the transmission tower 1 constructed in such a mountainous area. At the same time, particularly during an earthquake, a large acceleration acts on the foundation, and the tower 1 may behave differently from the natural ground. Moreover, the range of about 1-2m outside from the inverted T-shaped foundations 3A to 3D is in the self-owned land (inside the private land boundary 4), and when the reinforcement work is applied to the range beyond this land Because land transfers may require transfer or land lease from land owners, negotiations may be difficult, and other secondary disasters may occur due to new logging or land modification. It is intended as a reinforcement work.

上記補強方針の下、本補強方法では、前記送電用鉄塔１が構築された所有地内に深礎基礎５を構築し、この深礎基礎５と鉄塔トラス２とを連結する補強鋼材６，７を設けるものである。   Under the above reinforcement policy, in this reinforcement method, the foundation foundation 5 is constructed in the property where the transmission tower 1 is constructed, and the reinforcing steel materials 6 and 7 for connecting the foundation foundation 5 and the tower truss 2 are connected. It is to be provided.

本補強方法では、常時の状態では、新たに構築した前記深礎基礎５や追加した補強鋼材６，７には、荷重はほとんど導入されないが、地震や集中豪雨により既設基礎３に変位が生じると、応力的均衡を取るように前記補強鋼材６，７に応力が導入されるとともに、深礎基礎５に荷重が伝達され、送電用鉄塔２の破損や倒壊を防止するように機能する。この場合、前記深礎基礎５は地滑り抑止杭としても効果も期待することができる。   In this reinforcement method, in the normal state, almost no load is introduced into the newly constructed deep foundation 5 and the added reinforcing steel materials 6 and 7, but when the existing foundation 3 is displaced due to an earthquake or heavy rain. In addition, stress is introduced into the reinforcing steel members 6 and 7 so as to achieve a stress balance, and a load is transmitted to the deep foundation 5 to function to prevent the power transmission tower 2 from being broken or collapsed. In this case, the deep foundation 5 can also be expected to be effective as a landslide prevention pile.

前記補強鋼材６，７としては、鉄塔トラス部材２の部材剛性よりも断面寸法が大きい高剛性のものを使用するのが望ましい。また、補強鋼材６，７の端部は鉄塔トラス２の節点部に対して接続する。なお、鉄塔トラス２自体を補強するように設けたトラス補強鋼材７については、省略することも可能である。   As the reinforcing steel materials 6 and 7, it is desirable to use high-stiffness members having a cross-sectional dimension larger than the member rigidity of the steel tower truss member 2. Further, the end portions of the reinforcing steel materials 6 and 7 are connected to the node portions of the steel tower truss 2. Note that the truss-reinforced steel material 7 provided to reinforce the steel tower truss 2 itself can be omitted.

また、深礎基礎５と補強鋼材６との接続は、深礎基礎５の上部に支圧板付の主柱材又は金具８を埋設しておき、この支圧板付の主柱材又は金具８の上部と補強鋼材６の下端部とを溶接やボルト連結するようにするのが望ましい。   In addition, the connection between the deep foundation 5 and the reinforcing steel 6 is performed by burying a main column member or metal fitting 8 with a bearing plate in the upper part of the deep foundation foundation 5 and connecting the main column material or fitting 8 with the bearing plate. It is desirable that the upper portion and the lower end portion of the reinforcing steel material 6 be welded or bolted together.

以下、更に図面に基づいて、補強形態例別に具体的に詳述する。   In the following, further detailed description will be given for each reinforcing mode example based on the drawings.

＜第１形態様＞
図１に示される第１形態例では、前記深礎基礎８を前記４つの逆Ｔ型基礎３Ａ〜３Ｄに囲まれた領域内に構築し、この深礎基礎８と鉄塔トラス２の節点部とを補強鋼材６，６…で連結するものである。また、前記補強鋼材６のトラス側接続端部には、水平方向に沿って周方向に囲むようにトラス補強鋼材７，７…を設けている。 <First form>
In the first embodiment shown in FIG. 1, the deep foundation 8 is constructed in a region surrounded by the four inverted T-type foundations 3 </ b> A to 3 </ b> D, and the deep foundation 8 and the nodal portion of the steel tower truss 2 are constructed. Are connected by reinforcing steel materials 6, 6. Moreover, truss reinforcement steel materials 7, 7... Are provided at the truss side connection end portion of the reinforcement steel material 6 so as to surround the horizontal direction in the circumferential direction.

前記深礎基礎５の位置は、図示例ではほぼ中央としたが、斜面崩壊方向を考慮した上で、中央から偏倚した位置に構築するようにしてもよい。斜面崩壊方向にシフトした位置に構築することで、より効果的に斜面崩壊に対応することが可能となる。   Although the position of the deep foundation 5 is substantially the center in the illustrated example, it may be constructed at a position deviated from the center in consideration of the slope collapse direction. By constructing at a position shifted in the slope failure direction, it becomes possible to cope with slope failure more effectively.

本第１形態例は、地山全体が軟弱な場合に、加速度増加に対して効果が期待することができる。   The first embodiment can be expected to have an effect on increasing acceleration when the whole ground is soft.

＜第２形態例＞
図２に示される第２形態例は、前記深礎基礎５を、前記４つの逆Ｔ型基礎３Ａ〜３Ｄの内、谷側に位置する２つの逆Ｔ型基礎３Ｂ、３Ｃに対し、その谷側に構造的に一体的に挙動するように構築するものである。ここで、「構造的に一体的に挙動する」とは、逆Ｔ型基礎３Ｂ、３Ｃと深礎基礎５とが一部で結合されており、逆Ｔ型基礎３Ｂ、３Ｃと深礎基礎５とが構造的に外力に対して一体的に挙動し得る状態をいう。なお、補強鋼材６は、鉄塔トラス２の外側から節点部に対して接続するように設けられる。 <Second embodiment>
In the second embodiment shown in FIG. 2, the deep foundation 5 is divided into two inverted T-type foundations 3B and 3C located on the valley side of the four inverted T-type foundations 3A to 3D. It is constructed to behave structurally and integrally on the side. Here, “behaves integrally in structure” means that the inverted T-type foundations 3B, 3C and the deep foundation foundation 5 are partially connected, and the inverted T-type foundations 3B, 3C and the deep foundation foundation 5 are combined. Is a state that can behave integrally with external force structurally. The reinforcing steel material 6 is provided so as to be connected to the node portion from the outside of the steel tower truss 2.

前記深礎基礎５が、谷側にある逆Ｔ型基礎３Ｂ、３Ｃの更にその谷側に構築されることで、逆Ｔ型基礎３Ｂ、３Ｃの谷側向への変位を効果的に抑えることができる。また、深礎基礎５は、地滑り抑止杭としての効果が期待できる。   The deep foundation 5 is constructed further on the valley side of the inverted T-type foundations 3B and 3C on the valley side, thereby effectively suppressing displacement of the inverted T-type foundations 3B and 3C toward the valley side. Can do. Moreover, the deep foundation 5 can be expected to have an effect as a landslide prevention pile.

＜第３形態例＞
図３に示される第３形態例は、前記深礎基礎５を、前記４つの逆Ｔ型基礎３Ａ〜３Ｄの内、谷側に位置する２つの逆Ｔ型基礎３Ｂ、３Ｃの中間付近であって平面視で鉄塔トラス２の外側に構築するものである。補強鋼材６は、鉄塔トラス２の外側からトラス節点部に対して接続するように設けられる。 <Third embodiment>
In the third embodiment shown in FIG. 3, the deep foundation 5 is located near the middle of the two inverted T-type foundations 3B and 3C located on the valley side among the four inverted T-type foundations 3A to 3D. Thus, it is constructed outside the steel truss 2 in plan view. The reinforcing steel material 6 is provided so as to be connected to the truss node portion from the outside of the steel tower truss 2.

前記深礎基礎５が、谷側にある逆Ｔ型基礎３Ｂ、３Ｃの中間に構築されることで、逆Ｔ型基礎３Ｂ、３Ｃの谷側方向への変位・転倒を効果的に抑えることができる。また、深礎基礎５は、地滑り抑止杭としての効果が期待できる。   By constructing the deep foundation 5 in the middle of the inverted T-type foundations 3B and 3C on the valley side, it is possible to effectively suppress displacement / falling of the inverted T-type foundations 3B and 3C in the valley side direction. it can. Moreover, the deep foundation 5 can be expected to have an effect as a landslide prevention pile.

＜第４形態例＞
図４に示される第４形態例は、前記深礎基礎５を、前記４つの逆Ｔ型基礎３Ｃ〜３Ｄの内、谷側に位置する１つの逆Ｔ型基礎３Ｂに対し、該逆Ｔ型基礎３Ｂを跨ぐように左右対で構築するものである。補強鋼材６は、鉄塔トラス２の外側からトラス節点部に対して接続するように設けられる。 <Fourth embodiment>
In the fourth embodiment shown in FIG. 4, the deep foundation 5 is made up of the inverted T-type foundation 3B located on the valley side of the four inverted T-type foundations 3C to 3D. It is constructed in a pair of left and right so as to straddle the foundation 3B. The reinforcing steel material 6 is provided so as to be connected to the truss node portion from the outside of the steel tower truss 2.

前記深礎基礎５が、谷側にある逆Ｔ型基礎３Ｂを跨ぐようにその両側に構築されることで、逆Ｔ型基礎３Ｂの谷側方向への変位・転倒を効果的に抑えることができる。また、深礎基礎５は、地滑り抑止杭としての効果が期待できる。   By constructing the deep foundation 5 on both sides so as to straddle the inverted T-type foundation 3B on the valley side, it is possible to effectively suppress the displacement / falling of the inverted T-type foundation 3B in the valley side direction. it can. Moreover, the deep foundation 5 can be expected to have an effect as a landslide prevention pile.

＜第５形態例＞
図５に示される第５形態例は、前記深礎基礎５を、前記４つの逆Ｔ型基礎３Ｃ〜３Ｄの各中間位置であって平面視で鉄塔トラス２の外側に構築するものである。補強鋼材６は、鉄塔トラス２の外側からトラス節点部に対して接続するように設けられる。 <Fifth embodiment>
In the fifth embodiment shown in FIG. 5, the deep foundation 5 is constructed outside the steel truss 2 in a plan view at each intermediate position of the four inverted T-type foundations 3C to 3D. The reinforcing steel material 6 is provided so as to be connected to the truss node portion from the outside of the steel tower truss 2.

前記深礎基礎５が、逆Ｔ型基礎３Ｃ〜３Ｄの各中間位置に構築されることで、地山全体の補強効果に加え、地震の地表加速度を減少させることができる。また、深礎基礎５は、地滑り抑止杭としての効果が期待できる。   By constructing the deep foundation 5 at each intermediate position of the inverted T-type foundations 3C to 3D, it is possible to reduce the ground acceleration of the earthquake in addition to the reinforcing effect of the whole ground. Moreover, the deep foundation 5 can be expected to have an effect as a landslide prevention pile.

＜第６形態例＞
図６に示される第６形態例は、第１形態例の下で、前記深礎基礎５の頭部と、前記４つの逆Ｔ型基礎３Ｃ〜３Ｄの頂部とを鋼材又はＲＣ梁９，９…で結合するようにしたものである。各逆Ｔ型基礎３Ｃ〜３Ｄを一体的に補強できるとともに、地山が軟弱な場合に、変位抑制、加速度増加に対して効果が期待できる。 <Sixth embodiment>
In the sixth embodiment shown in FIG. 6, the head of the deep foundation 5 and the tops of the four inverted T-type foundations 3C to 3D are made of steel or RC beams 9, 9 under the first embodiment. It is combined with…. Each of the inverted T-type foundations 3C to 3D can be reinforced integrally, and when the ground is soft, an effect can be expected for displacement suppression and acceleration increase.

〔他の形態例〕
(1)上記形態例では、深礎基礎５を構築するようにしたが、これに代えて、低空頭で施工できる杭を構築するようにしてもよい。また、それらの杭を斜杭とし、曲げに対してより有効に作用するようにしてもよい。 [Other examples]
(1) Although the deep foundation 5 is constructed in the above embodiment, a pile that can be constructed with a low head may be constructed instead. Moreover, those piles may be inclined piles, and may act more effectively against bending.

１…送電用鉄塔、２…鉄塔トラス、３…逆Ｔ型基礎、５…深礎基礎、６…補強鋼材、７…トラス補強鋼材、８…支圧板付の主柱材又は金具、９…鋼材又はＲＣ梁   DESCRIPTION OF SYMBOLS 1 ... Power transmission tower, 2 ... Steel tower truss, 3 ... Inverted T type foundation, 5 ... Deep foundation foundation, 6 ... Reinforcement steel material, 7 ... Truss reinforcement steel material, 8 ... Main pillar material or metal fitting with a bearing plate, 9 ... Steel material Or RC beam

Claims (7)

山岳地に建設されるとともに、鉄塔トラスとこれを支持する４つの逆Ｔ型基礎とからなる送電用鉄塔の補強方法であって、
前記送電用鉄塔が構築された所有地内に深礎基礎又は杭基礎を構築し、この深礎基礎又は杭基礎と鉄塔トラスとを連結する補強鋼材を設けることを特徴とする送電用鉄塔の補強方法。 A method for reinforcing a power transmission tower constructed of a tower truss and four inverted T-type foundations supporting the tower truss and being built in a mountainous area,
A method for reinforcing a power transmission tower, comprising constructing a deep foundation or pile foundation in the property where the power transmission tower is constructed, and providing a reinforcing steel material for connecting the deep foundation or pile foundation and a steel tower truss. . 前記深礎基礎又は杭基礎は、前記４つの逆Ｔ型基礎に囲まれた領域内に構築する請求項１記載の送電用鉄塔の補強方法。   The method for reinforcing a power transmission tower according to claim 1, wherein the deep foundation or the pile foundation is constructed in a region surrounded by the four inverted T-type foundations. 前記深礎基礎又は杭基礎は、前記４つの逆Ｔ型基礎の内、谷側に位置する２つの逆Ｔ型基礎に対し、その谷側に構造的に一体的に挙動するように構築する請求項１記載の送電用鉄塔の補強方法。   The deep foundation foundation or the pile foundation is constructed such that, among the four inverted T-type foundations, two inverted T-type foundations located on the valley side behave structurally and integrally on the valley side. Item 2. A method for reinforcing a power transmission tower according to Item 1. 前記深礎基礎又は杭基礎は、前記４つの逆Ｔ型基礎の内、谷側に位置する２つの逆Ｔ型基礎の中間付近に構築する請求項１記載の送電用鉄塔の補強方法。   The method of reinforcing a transmission tower according to claim 1, wherein the deep foundation or the pile foundation is constructed near the middle of two inverted T-type foundations located on the valley side among the four inverted T-type foundations. 前記深礎基礎又は杭基礎は、前記４つの逆Ｔ型基礎の内、谷側に位置する１つの逆Ｔ型基礎に対し、該逆Ｔ型基礎を跨ぐように左右対で構築する請求項１記載の送電用鉄塔の補強方法。   The deep foundation foundation or the pile foundation is constructed in left and right pairs so as to straddle the inverted T-type foundation with respect to one inverted T-type foundation located on the valley side among the four inverted T-type foundations. A method for reinforcing a power transmission tower as described. 前記深礎基礎又は杭基礎は、前記４つの逆Ｔ型基礎の各中間位置に構築する請求項１記載の送電用鉄塔の補強方法。   The method for reinforcing a transmission tower according to claim 1, wherein the deep foundation or the pile foundation is constructed at each intermediate position of the four inverted T-type foundations. 前記深礎基礎又は杭基礎の頭部と、前記４つの逆Ｔ型基礎の頂部とを結合する梁鋼材を設ける請求項２記載の送電用鉄塔の補強方法。   The method for reinforcing a power transmission tower according to claim 2, wherein a beam steel material is provided to connect a head portion of the deep foundation or pile foundation and tops of the four inverted T-type foundations.
JP2011031730A 2011-02-17 2011-02-17 Reinforcement method for power transmission towers Active JP5679305B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2011031730A JP5679305B2 (en) 2011-02-17 2011-02-17 Reinforcement method for power transmission towers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2011031730A JP5679305B2 (en) 2011-02-17 2011-02-17 Reinforcement method for power transmission towers

Publications (2)

Publication Number Publication Date
JP2012172295A true JP2012172295A (en) 2012-09-10
JP5679305B2 JP5679305B2 (en) 2015-03-04

Family

ID=46975478

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2011031730A Active JP5679305B2 (en) 2011-02-17 2011-02-17 Reinforcement method for power transmission towers

Country Status (1)

Country Link
JP (1) JP5679305B2 (en)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103628495A (en) * 2013-12-09 2014-03-12 中国科学院武汉岩土力学研究所 Slope excavating and digging foundation provided with pile anchor
JP2014084653A (en) * 2012-10-24 2014-05-12 Chugoku Electric Power Co Inc:The Reinforcing structure of steel tower
JP5587466B1 (en) * 2013-06-10 2014-09-10 中国電力株式会社 Tower-like structure with acceptable collapse direction
CN104265053A (en) * 2014-10-21 2015-01-07 温州电力设计有限公司 High-voltage transmission line in-river tower
CN105244834A (en) * 2015-11-05 2016-01-13 国家电网公司 Double-circuit overhead power transmission line double-T wiring tower and wiring structure thereof
CN106567402A (en) * 2016-10-19 2017-04-19 上海二十冶建设有限公司 Hillside tower crane foundation construction device and construction method thereof
CN107130808A (en) * 2017-05-23 2017-09-05 中建钢构有限公司 A kind of assembled support jig
CN107558487A (en) * 2017-08-29 2018-01-09 国网山西省电力公司晋城供电公司 A kind of goaf transmission line foundation bracing means and reinforcement means
JP2018003306A (en) * 2016-06-28 2018-01-11 東京電力ホールディングス株式会社 Structure and method for measure for stabilization of ground on periphery of structure
JP2018021322A (en) * 2016-08-02 2018-02-08 東京電力ホールディングス株式会社 Pile foundation and tower reconstruction method
CN107675737A (en) * 2017-11-13 2018-02-09 国网山东省电力公司德州供电公司 A kind of transmission line of electricity high voltage iron tower and the bracing means on basis
CN109083479A (en) * 2018-08-09 2018-12-25 绵阳鹏志远科技有限公司 A kind of anti-collapse monitoring lever apparatus applied to hillside
CN109235470A (en) * 2018-10-26 2019-01-18 中国能源建设集团云南省电力设计院有限公司 A kind of antiskid structure to come down for charging improvement power transmission line column position
CN109671174A (en) * 2018-12-20 2019-04-23 北京中飞艾维航空科技有限公司 A kind of pylon method for inspecting and device
CN111173026A (en) * 2020-01-10 2020-05-19 中国华西企业股份有限公司 Steel structure conversion foundation of tower crane and construction method
JP2021143466A (en) * 2020-03-10 2021-09-24 東京電力ホールディングス株式会社 Reinforcement method of inverted t-shaped foundation

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107386751A (en) * 2017-06-27 2017-11-24 国网北京市电力公司 Electric power tower

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001254368A (en) * 2000-03-14 2001-09-21 Fujita Corp Foundation reinforcing method and fixture for reinforcing pile for use therein
JP2004132112A (en) * 2002-10-15 2004-04-30 Tokyo Electric Power Co Inc:The Lowermost structure of steel tower
JP2008208634A (en) * 2007-02-27 2008-09-11 Tokyo Electric Power Co Inc:The Power transmission steel tower reinforcing method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001254368A (en) * 2000-03-14 2001-09-21 Fujita Corp Foundation reinforcing method and fixture for reinforcing pile for use therein
JP2004132112A (en) * 2002-10-15 2004-04-30 Tokyo Electric Power Co Inc:The Lowermost structure of steel tower
JP2008208634A (en) * 2007-02-27 2008-09-11 Tokyo Electric Power Co Inc:The Power transmission steel tower reinforcing method

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014084653A (en) * 2012-10-24 2014-05-12 Chugoku Electric Power Co Inc:The Reinforcing structure of steel tower
JP5587466B1 (en) * 2013-06-10 2014-09-10 中国電力株式会社 Tower-like structure with acceptable collapse direction
CN103628495A (en) * 2013-12-09 2014-03-12 中国科学院武汉岩土力学研究所 Slope excavating and digging foundation provided with pile anchor
CN103628495B (en) * 2013-12-09 2015-12-02 中国科学院武汉岩土力学研究所 A kind of slope digging foundation with piled anchor
CN104265053A (en) * 2014-10-21 2015-01-07 温州电力设计有限公司 High-voltage transmission line in-river tower
CN104265053B (en) * 2014-10-21 2016-04-06 温州电力设计有限公司 A kind of ultra-high-tension power transmission line Jiang Zhongta
CN105244834A (en) * 2015-11-05 2016-01-13 国家电网公司 Double-circuit overhead power transmission line double-T wiring tower and wiring structure thereof
JP2018003306A (en) * 2016-06-28 2018-01-11 東京電力ホールディングス株式会社 Structure and method for measure for stabilization of ground on periphery of structure
JP2018021322A (en) * 2016-08-02 2018-02-08 東京電力ホールディングス株式会社 Pile foundation and tower reconstruction method
CN106567402A (en) * 2016-10-19 2017-04-19 上海二十冶建设有限公司 Hillside tower crane foundation construction device and construction method thereof
CN107130808A (en) * 2017-05-23 2017-09-05 中建钢构有限公司 A kind of assembled support jig
CN107558487A (en) * 2017-08-29 2018-01-09 国网山西省电力公司晋城供电公司 A kind of goaf transmission line foundation bracing means and reinforcement means
CN107675737A (en) * 2017-11-13 2018-02-09 国网山东省电力公司德州供电公司 A kind of transmission line of electricity high voltage iron tower and the bracing means on basis
CN109083479A (en) * 2018-08-09 2018-12-25 绵阳鹏志远科技有限公司 A kind of anti-collapse monitoring lever apparatus applied to hillside
CN109235470A (en) * 2018-10-26 2019-01-18 中国能源建设集团云南省电力设计院有限公司 A kind of antiskid structure to come down for charging improvement power transmission line column position
CN109235470B (en) * 2018-10-26 2024-02-06 中国能源建设集团云南省电力设计院有限公司 Anti-slip structure for electrified management of power transmission line tower landslide
CN109671174A (en) * 2018-12-20 2019-04-23 北京中飞艾维航空科技有限公司 A kind of pylon method for inspecting and device
CN111173026A (en) * 2020-01-10 2020-05-19 中国华西企业股份有限公司 Steel structure conversion foundation of tower crane and construction method
JP2021143466A (en) * 2020-03-10 2021-09-24 東京電力ホールディングス株式会社 Reinforcement method of inverted t-shaped foundation
JP7342739B2 (en) 2020-03-10 2023-09-12 東京電力ホールディングス株式会社 How to reinforce an inverted T-shaped foundation

Also Published As

Publication number Publication date
JP5679305B2 (en) 2015-03-04

Similar Documents

Publication Publication Date Title
JP5679305B2 (en) Reinforcement method for power transmission towers
JP6834226B2 (en) Pile foundation and tower rebuilding method
JP6642977B2 (en) Pile foundation structure
JP4912030B2 (en) Junction structure between pier and pile
JP2018003308A (en) Seismic reinforcement structure of pile foundation and construction method thereof
JP6283537B2 (en) Liquefaction countermeasure structure
KR20140069845A (en) Retaining wall using diagonal reinforcement member
JP5296585B2 (en) Soil cement improved structure and piled raft foundation
KR20120073623A (en) Connecting structure of steel pipe sheet pile
JP6201929B2 (en) Abutment scour prevention structure
JP2018003523A (en) Pile foundation structure, and reinforcement method for existing pile
JP3999625B2 (en) Bottom structure of steel tower
CN108487303B (en) Combined retaining wall of supporting pile and counterfort retaining wall and construction method
JP2013096096A (en) Bridge
JP4466419B2 (en) Soil cement column wall
JP2004003179A (en) Reinforcing structure for jacket structure and foundation structure using jacket structure
JP2008223245A (en) Column base structure
JP7439588B2 (en) Shoring structure of retaining wall
CN112711820B (en) Circular support rigidity calculation method
JP6529241B2 (en) Building foundation structure and construction method of building foundation structure
JP5835110B2 (en) Quay-quake-proof structure and quake-quake-proof reinforcement method
JP5005604B2 (en) Tunnel structure
JP6925091B1 (en) Box culvert
JP2005068859A (en) Earthquake-resistant dirt floor
CN102619232B (en) Reinforced concrete foundation capable of improving aseismic capacity

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20130924

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20140324

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20140515

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20140708

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20141212

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20141225

R150 Certificate of patent or registration of utility model

Ref document number: 5679305

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

S533 Written request for registration of change of name

Free format text: JAPANESE INTERMEDIATE CODE: R313533

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350