JP2009293325A - Apparatus for confirming condition of anchoring function - Google Patents
Apparatus for confirming condition of anchoring function Download PDFInfo
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- JP2009293325A JP2009293325A JP2008149948A JP2008149948A JP2009293325A JP 2009293325 A JP2009293325 A JP 2009293325A JP 2008149948 A JP2008149948 A JP 2008149948A JP 2008149948 A JP2008149948 A JP 2008149948A JP 2009293325 A JP2009293325 A JP 2009293325A
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- 125000006850 spacer group Chemical group 0.000 claims abstract description 7
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- 230000037431 insertion Effects 0.000 claims description 22
- 238000012790 confirmation Methods 0.000 claims description 8
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- 238000006073 displacement reaction Methods 0.000 abstract description 27
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- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 2
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Landscapes
- Piles And Underground Anchors (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
Description
本発明は、アンカーの機能状況を確認する構造に関する。 The present invention relates to a structure for confirming the functional status of an anchor.
従来のアンカーの機能状況を確認する方法は、アンカーに生じている荷重を計測するものと、アンカーないし地盤の変位を計測するものである。
荷重を計測する方法には，施工時に設置したロードセルを測定する方法と、リフトオフテストによる方法がある。
変位を計測する方法には、測量により頭部の変位を計測する方法と縦型伸縮計により地盤変位を計測する方法があり、これらを単独あるいは組み合わせて用いられる。
There are two methods for measuring the load: a method of measuring a load cell installed during construction and a method of lift-off test.
There are two methods for measuring the displacement: a method of measuring the displacement of the head by surveying, and a method of measuring the ground displacement by a vertical extensometer, which are used alone or in combination.
(1) 上記特許文１の発明は、アンカーの頭部（上端部）において計測する点が共通するが、本発明の上記請求項に対して、特許文献１のそれは「グラウンドアンカーの上端の端面に対向させて配置した反射式レーザー変位計、前記加圧装置の荷重を測定する荷重計及び前記レーザー変位計の出力と前記荷重計の出力とを実質上同時に読取る読取り手段を備えてなるグラウンドアンカーの伸び計測装置。」であるから、その構成は本発明とは全く異なる。
(2) 従前の技術のうち、荷重を計測する方法は残存引張り力を確認するのみであったため、荷重値に異常があってもその原因となる受圧板の沈下やアンカー体の引き抜け等の異常個所、すべり変位の発生等の地盤状況の変化を判断することはできなかった。さらに、ロードセルを測定する方法は低寿命であったり、リフトオフテストによる方法は計測に労力を要するため、いずれも高コストであった。
また従前の技術のうち変位を計測する方法は、アンカー頭部の位置変化や地盤の変動計測から、間接的にアンカーの状態を推定するため、アンカーの荷重変化やアンカーの機能状況を直接的に判断することはできなかった。
さらに測量による方法は、光波測距儀を用いた場合でも計測誤差が大きく、アンカーの徴少な変化を計測するには十分ではなかった。このほか縦型伸縮計による地盤変位計測は、アンカー設置するための孔とは別に縦孔を掘削してシース付きワイヤーを設置しなければならないため、高コストであった。
以上の通り、アンカーの機能状況は地盤状況と合わせて把握する必要があるものの、従前の荷重を計測する方法と変位を計測する方法について、そのどちらも簡便さ、耐久性、コストの面で十分な技術とはいえなかった。
(1) The invention of Patent Document 1 is common in that it is measured at the head (upper end) of the anchor. However, in contrast to the above-mentioned claim of the present invention, that of Patent Document 1 is “the end face of the upper end of the ground anchor”. Reflective laser displacement meter disposed opposite to the load device, a load meter for measuring the load of the pressurizing device, and a ground anchor that reads the output of the laser displacement meter and the output of the load meter substantially simultaneously Therefore, the configuration is completely different from that of the present invention.
(2) Of the previous technologies, the method of measuring the load was only to check the residual tensile force, so even if there is an abnormality in the load value, such as subsidence of the pressure receiving plate or pulling out of the anchor body It was not possible to judge changes in ground conditions such as abnormal locations and occurrence of sliding displacement. In addition, the load cell measuring method has a low life, and the lift-off test method requires a lot of labor for measurement, so that both methods are expensive.
In addition, among the conventional techniques, the method of measuring displacement is to estimate the anchor state indirectly from changes in the position of the anchor head and changes in the ground. I couldn't judge.
Further, the surveying method has a large measurement error even when the light wave rangefinder is used, and is not sufficient for measuring a small change in the anchor. In addition, ground displacement measurement using a vertical extensometer was expensive because it was necessary to drill a vertical hole separately from the hole for anchor installation and install a sheathed wire.
As described above, although it is necessary to grasp the functional status of the anchor together with the ground status, both the conventional load measuring method and the displacement measuring method are sufficient in terms of simplicity, durability, and cost. It was not a good technique.
そこで、本発明は上記の課題を解決するためこ、アンカーの荷重変化や定着体の引き抜け、地盤の変状を、簡易且つ長期的、経済的に精度よく確認することができる方法を提供するものである。 In view of the above, the present invention provides a method capable of simply, long-term, and economically confirming a change in anchor load, pull-out of a fixing body, and ground deformation in order to solve the above-described problems. Is.
本発明の第１は、アンカー機能状況確認装置において、シースパイプ内において、低伸締率の素材からなる複数本のシース付きワイヤーを挿入し、当該各ワイヤーの長さを変えた基端を削孔の余長削孔部とアンカー体、スペーサー・ソケット錨などに固定し、そのシース付きワイヤーの先端部側をシースパイプから引き出して、その先端を多点式標尺に接続するようにしたものである。 According to a first aspect of the present invention, in the anchor function status confirmation device, a plurality of sheathed wires made of a material having a low stretch rate are inserted into a sheath pipe, and the base ends of the wires having different lengths are cut. It is fixed to the extra drilling part of the hole, the anchor body, the spacer / socket 錨, etc., and the tip end side of the sheathed wire is pulled out from the sheath pipe, and the tip is connected to a multi-point measuring scale. is there.
本発明の第２は、第1の発明に係るアンカー機能状況確認装置において、アンカー頭部のヘッドアダプタに挿通孔をあけ、当該挿通孔にシース付きワイヤーを挿通してその先端部側を外部に引き出し、その先端部を可動式インジケーター付き多点式標尺に取付け、さらにその先端に緊張力を与えるカウンターウエイトを取り付けるようにしたものである。 According to a second aspect of the present invention, in the anchor function status confirmation device according to the first aspect, an insertion hole is formed in the head adapter of the anchor head, a wire with a sheath is inserted into the insertion hole, and the tip end side is exposed to the outside. The front end of the drawer is attached to a multipoint measuring scale with a movable indicator, and a counterweight that gives tension to the front end is attached.
本発明の第３は、第1の発明に係るアンカー機能状況確認装置において、アンカー頭部のオイルキャップに挿通孔をあけ、当該挿通孔にシース付きワイヤーを挿通してその先端部側を外部に引き出し、その先端を可動式インジケーター付き多点式標尺に取付け、さらにその先端に緊張力を与えるカウンターウエイトを取り付けるようにしたものである。 According to a third aspect of the present invention, in the anchor function status confirmation device according to the first aspect of the present invention, an insertion hole is formed in the oil cap of the anchor head, a wire with a sheath is inserted into the insertion hole, and the tip end side is exposed to the outside. The tip of the drawer is attached to a multipoint gauge with a movable indicator, and a counterweight that gives tension to the tip is attached.
本願発明は上記の構成であるから、安価で高耐久性のワイヤーを変位計の機能する多点式標尺として用いることで、長期的・経済的にアンカーの機能状況を確認することができ、シース付きワイヤーをアンカーと同時に施工することから、技術的に優れ、且つ設置が簡易化されることで、さらに経済性にも優れる。 Since the invention of the present application has the above-described configuration, the use of an inexpensive and highly durable wire as a multi-point measuring scale that functions as a displacement meter allows the functional status of the anchor to be confirmed in the long term and economically. Since the attached wire is constructed at the same time as the anchor, it is technically excellent and the installation is simplified, so that the economy is further improved.
また、伸縮率の低いワイヤーを用いてアンカー各部および削孔余長部の変位を計測できるようにしたことから、測量などと較べて精度が高く、異常があった場合には荷重変化や定着体の引き抜け、地盤の変状などの異常原因と異常個所を容易に特定することができる。 In addition, since it is possible to measure the displacement of each part of the anchor and the extra drilling length using a wire with a low expansion / contraction rate, the accuracy is higher than that of surveying, etc. It is possible to easily identify the cause and location of abnormalities such as pulling out of the ground and deformation of the ground.
さらに、アンカー各部の変位を地上部で容易に目視確認できるようにしたことから、アンカーの機能状況の確認を経済的に行うことができる。 Furthermore, since the displacement of each part of the anchor can be easily visually confirmed on the ground part, the functional status of the anchor can be confirmed economically.
この発明の実施形態を図に即して示す。図1の実施形態ではある種のアンカーに適用した例を示しているが、構造を多少変更することによりあらゆる形式のアンカーに適用できる。 An embodiment of the present invention is shown in the drawings. Although the embodiment shown in FIG. 1 shows an example applied to a certain type of anchor, it can be applied to any type of anchor by slightly changing the structure.
図１の実施形態では、計測用ワイヤーの緊張力をカウンターウエイトによって与えているが、バネなどを用いて小型化してもよい。
また、図1の実施形態では目視判読できる多点式標尺を用いているが、電気的な変位計に変更して連続観測することもできる。
In the embodiment of FIG. 1, the tension of the measuring wire is given by the counterweight, but it may be miniaturized using a spring or the like.
Further, in the embodiment of FIG. 1, a multi-point type measuring scale that can be visually read is used, but it is also possible to change to an electric displacement meter for continuous observation.
さらに，多点式標尺はオイルキャップを貫通した形状とすることもできる。利用形態の例として、計測結果に基づく正常の状態から変位する異常個所の判断例を図５〜図８に示す。 Furthermore, the multipoint type staff can also have a shape penetrating the oil cap. As examples of usage forms, examples of determining an abnormal location that deviates from a normal state based on measurement results are shown in FIGS.
本発明の実施例を図面に則して説明する。図１において、アンカーは、後述のアンカー体と自由長部とアンカー頭部とからなっている。そして、図１〜３において、１はアンカーの引張り部を納めるポリエチレン材質からなるシースパイプ、２はシースパイプ１の中に挿入するアンボンドＰＣ鋼より線、３は支圧板、４は耐荷体、５はスペーサ、６はシースパイプ１内に挿入するワイヤーであり、複数本のワイヤー束をシースで被覆してある。そのシース付きワイヤー６の長さを変えた基端部６a′、６b′、６c′、６d′、６e′を支圧板３やアンカー体４・スペーサー５・ソケット錨１８などに圧着し、又は小孔をあけて結線して固定してある。７はアンカー体Ａの頭部Ａ′側のアンカープレート、８はヘッドアダプタ、９はそのヘッドアダプタ８にあけた挿通孔である。当該挿通孔には締込型パッキン９pを設けてある。１０は前記の挿通孔９からワイヤー６の先端部側から引き出してその先端部６a、６b、６c、６d、６eを可動式インジケーター１１に結んで変位量を読みとる多点式標尺であり、図4にあっては目盛線１０′が設けられている。１２はその多点式標の直下においてワイヤー先端部６a、６b、６c、６d、６eから延長した先端に結んで緊張力を与えるためのカウンターウエイトである。１３はアンカー頭部Ａ′のアンカーヘッド、１４はそのアンカーヘッド用のくさび、１５はオイルキャップ、１６は受圧板、１７はアンカー体Ａの先端キャップ、１８は削孔Ｈの余長部Ｈ′にワイヤー基端部を設置するためのソケット錨であり、アンカー体Ａと分離する構造を有する。そして、その先端キャップ１７に被せた着脱可能なソケット錨１８に固定したシース付きワイヤー６は、削孔Ｈの余長部Ｈ′に当該削孔内に注入したグラウトで固定され、アンカー引抜け時にはアンカー体Ａとソケット錨１８が分離する構造とすることにより、当該ソケット式錨は削孔余長部Ｈ′に残存し、アンカー変状の様々な原因を把握することができるようにしてなる。図中Ｌｆは、アンカー体Ａとアンカー頭部Ａ′と共にアンカーの全長をなす自由長部である。 Embodiments of the present invention will be described with reference to the drawings. In FIG. 1, the anchor includes an anchor body, a free length portion, and an anchor head described later. 1 to 3, 1 is a sheath pipe made of a polyethylene material that accommodates an anchor tension portion, 2 is an unbonded PC steel strand inserted into the sheath pipe 1, 3 is a bearing plate, 4 is a load bearing body, 5 Is a spacer, and 6 is a wire to be inserted into the sheath pipe 1, and a plurality of wire bundles are covered with a sheath. The base ends 6a ', 6b', 6c ', 6d', 6e 'of which the length of the sheathed wire 6 is changed are pressure-bonded to the bearing plate 3, the anchor body 4, the spacer 5, the socket rod 18 or the like. A hole is drilled and connected. Reference numeral 7 denotes an anchor plate on the head A ′ side of the anchor body A, 8 denotes a head adapter, and 9 denotes an insertion hole formed in the head adapter 8. A tightening type packing 9p is provided in the insertion hole. Reference numeral 10 denotes a multi-point measuring rod that is pulled out from the distal end side of the wire 6 from the insertion hole 9 and connects the distal end portions 6a, 6b, 6c, 6d, 6e to the movable indicator 11 to read the displacement amount. In this case, a scale line 10 'is provided. Reference numeral 12 denotes a counterweight that is connected to a tip extended from the wire tip 6a, 6b, 6c, 6d, 6e just below the multipoint mark to give tension. 13 is an anchor head of the anchor head A ′, 14 is a wedge for the anchor head, 15 is an oil cap, 16 is a pressure receiving plate, 17 is a tip cap of the anchor body A, and 18 is an extra length H ′ of the hole H. Socket base for installing the wire base end portion, and has a structure separated from the anchor body A. The sheathed wire 6 fixed to the detachable socket rod 18 over the tip cap 17 is fixed to the surplus length H 'of the hole H with the grout injected into the hole, and when the anchor is pulled out. By adopting a structure in which the anchor body A and the socket rod 18 are separated, the socket type rod remains in the drilling surplus length portion H ′ so that various causes of anchor deformation can be grasped. In the figure, L f is a free length portion that forms the entire length of the anchor together with the anchor body A and the anchor head A ′.
図４は、図１のアンカー頭部Ａ′の他の実施例を示し、オイルキャップ１５の中央に挿通孔１９があけられ、当該挿通孔に締込型パッキン１９Pが設けられ、この挿通孔にワイヤー先端部側を引き出してそのワイヤー先端部６a、６b、６c、６d、６eをインジケーター１１付きの多点式標尺１０に取り付け、さらにワイヤー先端部から延長した先端にカウンターウエイト１２を取り付けたものを示す。 Figure 4 shows another embodiment of the anchor head A 'of FIG. 1, the insertion hole 19 drilled in the center of the oil cap 15, tightening packings 19 P is provided in the insertion hole, the insertion hole The end of the wire is pulled out and the end 6a, 6b, 6c, 6d, 6e of the wire is attached to a multi-point gauge 10 with an indicator 11, and a counterweight 12 is attached to the end extended from the end of the wire. Indicates.
「本発明に係る装置の設置工程」
本発明に係るアンカー機能状況確認装置の設置工程は次のとおりである。
（１） アンカーの工場組み立てにおいて、テンドン・アンカー体組み立て作業と同時に、シース付きのワイヤー６の基端部（６a′、６b′、６c′、６d′、６e′）をアンカー体Ａとスペーサー５とソケット錨１８などに専用プレスにより圧着して固定し、又は小孔をあけてこれに挿通して結線して固定した後、シースパイプ１内に挿入する。そして、シース付きワイヤー６の先端部側をアンカー頭部Ａ′の挿通孔９(又はオイルキャップ１５の挿通孔１９「図４」)から外部に導き出しておく（図１）。または、前記のワイヤー６の先端部側をオイルキャップ１５の挿通孔１９から外部に導き出しておく（図４）。
（２） 削孔Ｈ内にアンカー（アンカー体Ａ+自由長部+アンカー頭部Ａ′）を挿入する（図９）。
（３） シース付きワイヤー６の先端部側をグラウトから保護する処理を行った後、シースパイプ１内に納め、公知の手段でアンカーのグラウトの注入を行う（図１０）。グラウトの注入が終了したら、シース付きワイヤー６の先端部６a〜６e側をシースパイプ１から引き出し、カウンターウエイト程度の緊張力を与えておく。
（４） グラウトが所定の強度に達した後、アンカー頭部Ａ′の処理を行い、アンカープレート７とヘッドアダプタ８を取り付け、挿通孔９又はオイルキャップ１５の挿通孔１９からシース付きワイヤー６の先端部を引き出した後、緊張して試験を行い、定着する（図１１又は図４）。
（５） 上記（４）の工程において、アンカー頭部Ａ′あるいは受圧板１６に可動式インジケーター１１付きの多点式標尺１０などを取り付け、さらに引き出したワイヤー６の先端にカウンターウエイト１２などを取り付けると共に、複数本のワイヤー６を可動式インジケーター１１に取り付ける（図１、図２）。
"Installation process of the device according to the present invention"
The installation process of the anchor function status confirmation apparatus according to the present invention is as follows.
(1) In the factory assembly of the anchor, simultaneously with the assembly work of the tendon anchor body, the base end portion (6a ', 6b', 6c ', 6d', 6e ') of the sheathed wire 6 is connected to the anchor body A and the spacer 5 Then, it is fixed by crimping to the socket 18 or the like with a dedicated press, or a small hole is made, inserted and connected, and then inserted into the sheath pipe 1. Then, the distal end side of the sheathed wire 6 is led out from the insertion hole 9 of the anchor head A ′ (or the insertion hole 19 of the oil cap 15 “FIG. 4”) (FIG. 1). Or the front-end | tip part side of the said wire 6 is led outside from the insertion hole 19 of the oil cap 15 (FIG. 4).
(2) An anchor (anchor body A + free length portion + anchor head A ′) is inserted into the hole H (FIG. 9).
(3) After performing the process which protects the front-end | tip part side of the wire 6 with a sheath from a grout, it accommodates in the sheath pipe 1, and inject | pours the grout of an anchor by a well-known means (FIG. 10). When the injection of the grout is completed, the distal end portions 6a to 6e of the sheathed wire 6 are pulled out from the sheath pipe 1 to give a tension force of about the counterweight.
(4) After the grout reaches a predetermined strength, the anchor head A ′ is processed, the anchor plate 7 and the head adapter 8 are attached, and the sheathed wire 6 is inserted from the insertion hole 9 or the insertion hole 19 of the oil cap 15. After pulling out the tip, the test is conducted with tension and fixed (FIG. 11 or FIG. 4).
(5) In the step (4), the anchor head A ′ or the pressure receiving plate 16 is attached with the multipoint measure 10 with the movable indicator 11, and the counterweight 12 is attached to the leading end of the drawn wire 6. At the same time, a plurality of wires 6 are attached to the movable indicator 11 (FIGS. 1 and 2).
「本発明装置による作用」
本発明装置による具体的な作用は次の通りである。
（１） 計測用ワイヤー６は、シースによってグラウトや地盤と分離した構造であるため、地盤Ｇやアンカー(アンカー体Ａ+自由長部Ｌf+アンカー頭部Ａ′)の変形によって、ワイヤー６に引込まれたり引出される。そのシース付きワイヤー６は、アンカー頭部Ａ′とワイヤー先端部の距離を計測するので、アンカー頭部を含む受圧板１６が沈下した場合には、ワイヤー基端部６a′・６b′・６′・６′・６e′とアンカー頭部Ａ′の距離が短縮するため、ワイヤーは引き出される（この変位を縮み量（↓）とする）。
"Operation by the device of the present invention"
The specific operation of the device of the present invention is as follows.
(1) Since the measurement wire 6 is separated from the grout and the ground by the sheath, the wire 6 is deformed by the deformation of the ground G and the anchor (anchor body A + free length Lf + anchor head A ′). Withdrawn or withdrawn. Since the sheathed wire 6 measures the distance between the anchor head A ′ and the wire tip, when the pressure receiving plate 16 including the anchor head sinks, the wire base ends 6a ′, 6b ′, 6 ′. Since the distance between 6 ′ and 6e ′ and the anchor head A ′ is shortened, the wire is pulled out (this displacement is referred to as a contraction amount (↓)).
逆に地滑り等により、アンカーの一部に折れ曲がりが生じると、折れ曲がり部の奥に設置したワイヤーでは、ワイヤー基端端部６a′・６b′・６′・６′・６e′とアンカー頭部Ａ′のワイヤー６に沿う距離が増加するため、ワイヤーは引き込まれる（この変位を伸び量（↑）とする）。 On the other hand, when a part of the anchor is bent due to landslide or the like, the wire installed at the back of the bent part has a wire base end 6a ′, 6b ′, 6 ′, 6 ′, 6e ′ and an anchor head A. Since the distance along the wire 6 increases, the wire is drawn (this displacement is defined as the amount of elongation (↑)).
インジケーター１１は、ワイヤー６の伸縮に応じて当該インジケーターに成形してあるガイド溝に沿って上下に可動し、その移動量はガイド溝脇に取り付けた多点式標尺１０により読みとる。
地滑りが発生したり、受圧板１３が沈下したりすると、ＰＣ鋼より線２に伸縮が生じ、同時にその変位がシース付きワイヤー６に現れる。ＰＣ鋼より線２の伸び量は、緊張荷重と線形関係であり、定着時荷重は既知であることから、多点式標尺１０のワイヤー６の伸び量（「上向き矢印」↑）や縮み量（「下向き矢印」↓）の数値を計測することでアンカーに作用する残存引張り力を推定することができる。
The indicator 11 moves up and down along the guide groove formed in the indicator according to the expansion and contraction of the wire 6, and the amount of movement is read by the multipoint type measure 10 attached to the side of the guide groove.
When a landslide occurs or the pressure receiving plate 13 sinks, the wire 2 expands and contracts from the PC steel, and at the same time, the displacement appears in the sheathed wire 6. The elongation amount of the PC steel wire 2 is linearly related to the tension load, and since the fixing load is known, the elongation amount (“upward arrow” ↑) or shrinkage amount of the wire 6 of the multi-point type shank 10 ( The residual tensile force acting on the anchor can be estimated by measuring the numerical value of “down arrow” ↓).
（２） 「正常時」：地盤Ｇに設置したアンカーに地滑り等の負荷がかからない正常時は、そのアンカーには全く変位は発生せず、変位計の機能を有する多点式標尺１０の変位量の数値は「０」である（図５）。 (2) “Normal”: When the anchor installed on the ground G is not subjected to a load such as landslide, the anchor is not displaced at all, and the displacement of the multipoint type measuring rod 10 having the function of a displacement meter The numerical value of “0” is “0” (FIG. 5).
（３） 「異常発生（1）」：地盤Ｇに地滑りの異常が発生すると、アンカーＡの荷重量（残存引張り力）が増加し、の多点式標尺１０のうち、一部のシース付きワイヤー６が引き込まれてその先端部6a・６b・６cの変位量の数値は「０」から伸び量（↑）を示す数値になる（図６）。 (3) “Abnormality (1)”: When a landslide abnormality occurs in the ground G, the load amount (residual tensile force) of the anchor A increases. 6 is drawn and the numerical values of the displacements of the tip portions 6a, 6b, and 6c are values indicating the amount of extension (↑) from “0” (FIG. 6).
（４）「異常発生（2）」：アンカーの引き抜け作用が発生するとアンカーにかかる荷重（残存引張り力）が減少して、縮み量が生じての多点式標尺１０のうち、図において、一部のシース付きワイヤー６の先端部６b・６cが引き出されてその変位量の数値は「０」から縮み量（↓）を示す数値になる（図７）。 (4) “Abnormal occurrence (2)”: In the figure, among the multi-point scale 10 in which the load (residual tensile force) applied to the anchor decreases when the anchor pull-out action occurs, and the amount of shrinkage occurs. The distal end portions 6b and 6c of some of the sheathed wires 6 are pulled out, and the numerical value of the displacement is a numerical value indicating the contraction amount (↓) from “0” (FIG. 7).
（５） 「異常発生（3）」：アンカー受圧板１６の地中方向への沈下作用が進行するとアンカーにかかる荷重（残存引張り力）が減少して、縮み量が生じて多点式標尺１０のうち、図において、全部のシース付きワイヤー６先端部の６a〜６eが引き出されてその変位量の数値は「０」から縮み量（↓）を示す数値になる（図８）。 (5) “Abnormality (3)”: When the anchoring action of the anchor pressure receiving plate 16 in the underground direction proceeds, the load applied to the anchor (residual tensile force) is reduced, and the amount of shrinkage is generated, resulting in the multi-point scale 10 In the figure, all the sheathed wire 6 tip portions 6a to 6e are pulled out, and the numerical value of the displacement amount becomes a numerical value indicating the contraction amount (↓) from “0” (FIG. 8).
このように、アンカーに生じている変化の状態によって、それぞれのワイヤーには異なった変動と変動量が表れるため、アンカーの機能状況を判定することができる。 As described above, since different fluctuations and fluctuation amounts appear in the respective wires depending on the state of change occurring in the anchor, it is possible to determine the functional state of the anchor.
実際には、上記段落「００２１」〜「００２３」に示す異常（1）・（2）・（3）が同時に発生するが、シース付きワイヤー６の先端部６a′、６b′、６c′、６d′、６e′をアンカー体Ａ、自由長部Ｌf、ソケット錨１８にそれぞれ１個所以上設置してその変位を計測することにより、いずれの組み合わせでも識別できる。 Actually, the abnormalities (1), (2), and (3) shown in the above paragraphs “0021” to “0023” occur at the same time, but the tips 6a ′, 6b ′, 6c ′, and 6d of the sheathed wire 6 are simultaneously generated. ′, 6e ′ can be discriminated by any combination by installing one or more of them on the anchor body A, the free length L f , and the socket 18 and measuring the displacement thereof.
１……シースパイプ
２……アンボンドＰＣ鋼より線
３……支圧板
４……耐荷体
５……スペーサ
６……複数本のシース付きワイヤー
７……アンカープレート
８……ヘッドアダプタ
９……挿通孔
１０……多点式標尺
１１……可動式インジケーター
１１……カウンターウエイト
１２……オイルキャップ
１３……挿通孔
１４……アンカーのヘッド体
１５……ヘッド体用くさび
１６……受圧板
１７……先端キャップ
１８……ソケット錨
DESCRIPTION OF SYMBOLS 1 ... Sheath pipe 2 ... Unbonded PC steel strand 3 ... Supporting plate 4 ... Load bearing 5 ... Spacer 6 ... Multiple wires with sheath 7 ... Anchor plate 8 ... Head adapter 9 ... Insertion Hole 10 ... Multi-point gauge 11 ... Movable indicator 11 ... Counter weight 12 ... Oil cap 13 ... Insertion hole 14 ... Anchor head body 15 ... Head wedge 16 ... Pressure receiving plate 17 ... ... End cap 18 ... Socket 錨
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| JP2008149948A JP5142029B2 (en) | 2008-06-06 | 2008-06-06 | Anchor function status confirmation device |
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| JP2008149948A JP5142029B2 (en) | 2008-06-06 | 2008-06-06 | Anchor function status confirmation device |
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| JP2009293325A true JP2009293325A (en) | 2009-12-17 |
| JP2009293325A5 JP2009293325A5 (en) | 2010-05-20 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012188840A (en) * | 2011-03-10 | 2012-10-04 | Kubota-C. I Co Ltd | Inner subpipe joint and manhole or basin using the joint |
| JP2015113615A (en) * | 2013-12-10 | 2015-06-22 | 一般財団法人ダム技術センター | Method and system for confirming residual tensile force of bonded type anchor, and method for confirming displacement thereof |
| JP2019500522A (en) * | 2015-12-24 | 2019-01-10 | ソイルテック コリア カンパニー リミテッドＳｏｉｌｔｅｃｈ．Ｋｏｒｅａ Ｃｏ．，Ｌｔｄ | Ground anchor capable of self-diagnosis of stress and its construction method |
| KR20190078909A (en) * | 2017-12-27 | 2019-07-05 | (주)한국리페어엔지니어링 | Anchor structure and construction method thereof |
| JP2020515744A (en) * | 2017-03-27 | 2020-05-28 | フィッシャーヴェルケ ゲゼルシャフト ミット ベシュレンクテル ハフツング ウント コンパニー コマンディートゲゼルシャフトｆｉｓｃｈｅｒｗｅｒｋｅ ＧｍｂＨ ＆ Ｃｏ． ＫＧ | Anchor placement structure and anchoring system in anchor hole |
| KR102194449B1 (en) * | 2019-08-29 | 2020-12-23 | (주)나다건설 | Anchor apparatus for check prestressing force and construction method thereof |
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| CN110986844B (en) * | 2019-12-04 | 2022-03-01 | 中铁开发投资集团有限公司 | Displacement meter installation assembly for underground displacement monitoring |
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|---|---|---|---|---|
| JPH0921661A (en) * | 1995-07-06 | 1997-01-21 | Sumitomo Electric Ind Ltd | Apparatus for monitoring underground state of anchor construction part |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH0921661A (en) * | 1995-07-06 | 1997-01-21 | Sumitomo Electric Ind Ltd | Apparatus for monitoring underground state of anchor construction part |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012188840A (en) * | 2011-03-10 | 2012-10-04 | Kubota-C. I Co Ltd | Inner subpipe joint and manhole or basin using the joint |
| JP2015113615A (en) * | 2013-12-10 | 2015-06-22 | 一般財団法人ダム技術センター | Method and system for confirming residual tensile force of bonded type anchor, and method for confirming displacement thereof |
| JP2019500522A (en) * | 2015-12-24 | 2019-01-10 | ソイルテック コリア カンパニー リミテッドＳｏｉｌｔｅｃｈ．Ｋｏｒｅａ Ｃｏ．，Ｌｔｄ | Ground anchor capable of self-diagnosis of stress and its construction method |
| JP2020515744A (en) * | 2017-03-27 | 2020-05-28 | フィッシャーヴェルケ ゲゼルシャフト ミット ベシュレンクテル ハフツング ウント コンパニー コマンディートゲゼルシャフトｆｉｓｃｈｅｒｗｅｒｋｅ ＧｍｂＨ ＆ Ｃｏ． ＫＧ | Anchor placement structure and anchoring system in anchor hole |
| JP7038731B2 (en) | 2017-03-27 | 2022-03-18 | フィッシャーヴェルケ ゲゼルシャフト ミット ベシュレンクテル ハフツング ウント コンパニー コマンディートゲゼルシャフト | Anchor placement structure and fixing system in the anchor hole |
| KR20190078909A (en) * | 2017-12-27 | 2019-07-05 | (주)한국리페어엔지니어링 | Anchor structure and construction method thereof |
| KR102079719B1 (en) * | 2017-12-27 | 2020-02-20 | (주)한국리페어엔지니어링 | Anchor structure and construction method thereof |
| KR102194449B1 (en) * | 2019-08-29 | 2020-12-23 | (주)나다건설 | Anchor apparatus for check prestressing force and construction method thereof |
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