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JP3635355B2 - Anchor head structure - Google Patents
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JP3635355B2 - Anchor head structure - Google Patents

Anchor head structure Download PDF

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Publication number
JP3635355B2
JP3635355B2 JP16785994A JP16785994A JP3635355B2 JP 3635355 B2 JP3635355 B2 JP 3635355B2 JP 16785994 A JP16785994 A JP 16785994A JP 16785994 A JP16785994 A JP 16785994A JP 3635355 B2 JP3635355 B2 JP 3635355B2
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JP
Japan
Prior art keywords
pedestal
holding
anchor head
head structure
tensile material
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.)
Expired - Fee Related
Application number
JP16785994A
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Japanese (ja)
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JPH07233529A (en
Inventor
伸二 福島
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.)
Fujita Corp
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Fujita Corp
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 Fujita Corp filed Critical Fujita Corp
Priority to JP16785994A priority Critical patent/JP3635355B2/en
Publication of JPH07233529A publication Critical patent/JPH07233529A/en
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Description

【0001】
【産業上の利用分野】
本発明はアンカー工法における引張材を緊張、固定するためのアンカー頭部構造に係るものである。
【0002】
【従来の技術】
従来、アンカー工法における地山の削孔部に先端が挿入、定着されたアンカー材の基端部を定着するように、地山の受圧部に支持された台座は、鋼板の組合せ部材、コンクリート板、あるいは鋼板だけより構成されている。
【0003】
【発明が解決しようとする課題】
しかしながら前記従来構造における台座面は、引張材挿入用の削孔の方向誤差や、アンカー頭部固定面の仕上げ精度等により、引張方向に必ずしも垂直な面を保持しない。このような場合に、従来の台座と支圧板とを組み合わせて引張材を固定すると、支圧面と引張材とが垂直に交叉しないため、アンカー頭部での引張材の緊張力と定着部に作用している実際のアンカー力は設計で想定しているものと異なることとなる。
【0004】
本発明は従来技術の有する問題点に鑑みて提案されたもので、その目的とする処は、引張材の方向に対して常に垂直面を保持しうる台座と支圧板とを組み合わせたアンカー頭部構造を提供する点にある。
【0005】
【課題を解決するための手段】
前記の目的を達成するために、本発明に係るアンカー頭部構造は、地山に接して配設された支圧部に支持された円柱または円筒状の台座と、同台座を前記支圧部に保持する保持金具と、地山内の削孔部に挿入され、先端部が同削孔部内に定着された引張材における前記円柱または円筒状の台座を貫通する基端部を、同台座に緊締する締付金具とよりなり、前記台座を前記支圧部に保持する保持金具はくさびにより構成されていることを特徴とする。
【0009】
【作用】
本発明は前記したように構成されているので、引張材を緊締して台座に固定する際に、支圧部に支持された円柱または円筒状の台座の彎曲面に沿って保持金具が滑動することによって、前記引張材を、同引張材が挿入された削孔方向と一致するように前記台座、支圧部に固定して緊張することができる。また本発明は、前記円柱または円筒状の台座を、くさびより構成された保持金具を使用して前記支圧部に保持せしめることにより、構成を簡略化し、作業性を向上させたものである。
【0012】
【実施例】
以下、本発明を図示の実施例について説明する。
図1乃至図8は本発明の第1実施例を示し、1は台座で、凸形球面状に形成され、長方形の開口部1aが穿設され、内部はアンカー力に十分に耐えられるように鋼板1bを縦横に組み合わせて補強されている。(図5乃至図6参照)
2は支圧板で、前記台座1の凸形球面部に滑動自在に嵌合する凹曲面2aが設けられるとともに、円形の開口部2bが設けられている。(図7及び図8参照)
次に前記アンカー頭部構造を具えたアンカー工法について説明する。
【0013】
H形鋼S1 で山留を構成した地山G内に削孔部Hを設け、(図1(イ)参照)同削孔部Hに引張材3を挿入し、(図1(ロ)参照)同削孔部Hの先端定着部にグラウト材を注入して、同削孔部Hに引張材3の先端部を定着したのち、同引張材3の基端部を前記H形鋼S1 に設置された台座1の開口部1aに挿貫し、(図1(ハ)参照)更に支圧板2における開口部2bに前記引張材3を貫通させ、且つ引張材3の方向に対して垂直を保つような位置を占めるように、前記台座1の凸形球面に沿って凹曲面2aを滑動し、(図1(ニ)参照)前記台座1及び支圧板2の各開口部1a、2bに挿貫した引張材3を締付金具4によって緊締、固定する(図1(ホ)参照)
図2に示す実施例においては山留構造物がコンクリート壁S2 より構成され、図3に示す実施例においては鋼板又はコンクリート板による独立構造の受圧部S3 が構成されている。
【0014】
図9乃至図14は本発明の他の実施例を示し図9において11は地山Gに接して配設された、引張材の緊張、固定用支圧板で、同支圧板11に台座12がくさび等より構成された保持金具13を介して所定位置に保持されるとともに、後述の引張材に対する締付金具14が設置されている。
なお前記図9においては地山G面に直接保持支圧板11及び台座12を設置した例が示されているが、同支圧板11及び台座12は図10に示すように山留構造物の土圧支持体の構造によって異なり、図10(イ)はコンクリート壁面に、また図10(ロ)はH形鋼Sからなる山留構造物に設置した場合を示す。
【0015】
図11は支圧板を示し、図11(イ)(ニ)は方形、(ロ)(ホ)は鋼製の円形主板に引張材挿貫用開口部11aが穿設され、(ハ)(ヘ)はコンクリートまたは鉄筋コンクリートを主体とする支圧板11の開口部11aの周囲が鋼板11bで補強されている。
図12は台座を示し、図12(イ)(ホ)は中央に引張材15が貫通される円形の開口部12aを有する円柱体より構成され、図12(ロ)(ヘ)は引張材15の貫通される円形の開口部12aが設けられ、図12(ハ)(ト)は引張材15が貫通される円形の開口部12aを有する半円柱体より構成され、同12(ニ)(チ)に示す台座は引張材15の貫通される欠円断面の円柱より構成された台座が示されている。
【0016】
図13は台座12を支圧板11の所定位置に保持するための保持金物13を示し、支圧板11に接する底面13aは平面で、台座12に接する面13bは上面は斜面、若しくは台座面に合わせた曲面状に形成されている。
図14は本発明のアンカー頭部構造を使用したアンカー工法の工程を示し、切土等で生じた地山Gに表面から引張材挿入用の削孔部Hを掘削し、(図14(イ)参照)同削孔部H内に引張材15を挿入し、(図14(ロ)参照)同削孔部Hにグラウトを注入したのち、支圧板11をその開口部11aに引張材15を貫通させて地山Gに設置する。(図14(ニ)参照)更に台座12をその開口部12aを介して前記引張材15に貫通させ、且つ引張材15の方向に対して台座12の開口部12aの方向が同一方向になるように支圧板11に設置して、締付金具14を介して仮締めする。(図14(ニ)参照)
次いで台座12が所定の位置を保持するように台座12と支圧板11との間に保持金物13を適宜数楔入し、(図14(ホ)参照)同保持金物13と締付金具14とによって引張材15を緊張し、固定する。
【0017】
【発明の効果】
本発明に係るアンカー頭部構造は前記したように、地山に接して配設された支圧部に支持された円柱または円筒状の台座と、同台座を前記支圧部に保持する保持金具と、地山内の削孔部に挿入され、先端部が同削孔部内に定着された引張材における前記円柱または円筒状の台座を貫通する基端部を、同台座に緊締する締付金具とよりなり、前記台座を前記支圧部に保持する保持金具はくさびにより構成されているので、アンカー頭部で加えた力と実際に定着部に作用するアンカー力を一致させることができる。従って、山留構造物の面と引張材の方向がなす角度が一定でなくても、常に引張材の方向に緊張することができる。更に、前記支圧部と台座は鋼材によって製作すれば各種寸法のものを目的に応じて簡単に、且つ比較的低コストで入手できる。また本発明は、前記台座を支圧部に保持する保持金具をくわびより構成したことによって、構成を簡略化し、作業性を向上させうるものである。
【図面の簡単な説明】
【図1】(イ)(ロ)(ハ)(ニ)及び(ホ)は本発明に係るアンカー頭部構造を具えたアンカー工法の一実施例の工程を示す縦断面図である。
【図2】前記アンカー工法の他の実施例の実施状況を示す縦断面図である。
【図3】前記アンカー工法の他の実施例の実施状況を示す縦断面図である。
【図4】台座の側面図である。
【図5】図4の矢視イ−イ図である。
【図6】図4の矢視ロ−ロ図である。
【図7】支圧板の側面図である。
【図8】図7の矢視ハ−ハ図である。
【図9】(イ)(ロ)は本発明に係るアンカー頭部構造の他の実施例を示す平面図及び縦断面図である。
【図10】(イ)(ロ)は夫々本発明に係るアンカー頭部構造の他の各実施例を示す縦断面図である。
【図11】(イ)(ロ)及び(ハ)は夫々支圧板の各例を示す平面図、(ニ)(ホ)及び(ヘ)は夫々(イ)(ロ)(ハ)の側面図である。
【図12】(イ)(ロ)(ハ)及び(ニ)は夫々台座の各例を示す平面図、(ホ)(ヘ)(ト)及び(チ)は夫々(イ)(ロ)(ハ)(ニ)の縦断側面図である。
【図13】(イ)(ロ)及び(ハ)は夫々保持金具の平面図、正面図及び側面図である。
【図14】(イ)(ロ)(ハ)(ニ)及び(ホ)は本発明に係るアンカー頭部構造を有するアンカー工法の他の実施例の工程を示す縦断面図である。
【符号の説明】
C コンクリート壁面
G 地山
H 削孔部
1 H形鋼
2 独立構造の受圧部
1 台座
1a 開口部
1b 鋼板
2 支圧板
2a 凹曲面
2b 開口部
3 引張材
4 締付金具
11 支圧板
11a 開口部
11b 鋼板
12 台座
12a 開口部
13 保持金具
14 締付金具
15 引張材
[0001]
[Industrial application fields]
The present invention relates to an anchor head structure for tensioning and fixing a tension member in an anchor method.
[0002]
[Prior art]
Conventionally, the pedestal supported by the pressure receiving part of the natural ground so that the base end of the anchor material where the tip has been inserted and fixed in the ground drilling part in the anchor method is fixed to the steel plate combination member, concrete plate Or it is comprised only from the steel plate.
[0003]
[Problems to be solved by the invention]
However, the pedestal surface in the conventional structure does not necessarily hold a surface perpendicular to the tensile direction due to the direction error of the hole for inserting the tensile material, the finishing accuracy of the anchor head fixing surface, and the like. In such a case, if the tension member is fixed by combining the conventional pedestal and the bearing plate, the bearing surface and the tension member do not cross perpendicularly, so that the tension force of the tension member at the anchor head and the anchoring part are affected. The actual anchor force is different from what is assumed in the design.
[0004]
The present invention has been proposed in view of the problems of the prior art, and the object of the present invention is an anchor head that combines a support plate and a pedestal that can always hold a vertical plane with respect to the direction of the tensile material. In providing the structure.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, an anchor head structure according to the present invention includes a columnar or cylindrical pedestal supported by a bearing part disposed in contact with a natural ground, and the pedestal serving as the bearing part. Fastening the holding bracket to the base and the base end that penetrates the columnar or cylindrical base of the tensile material inserted into the hole in the ground and the tip fixed to the hole. The holding fitting for holding the pedestal at the pressure-supporting portion is formed by a wedge .
[0009]
[Action]
Since the present invention is configured as described above, when the tension member is fastened and fixed to the pedestal, the holding bracket slides along the curved surface of the columnar or cylindrical pedestal supported by the bearing portion. Accordingly, the tension material can be fixed and tensioned to the pedestal and the supporting pressure portion so as to coincide with the drilling direction in which the tension material is inserted. Moreover, the present invention simplifies the configuration and improves workability by holding the columnar or cylindrical pedestal on the pressure-bearing portion using a holding metal fitting made of a wedge.
[0012]
【Example】
The present invention will be described below with reference to illustrated embodiments.
FIGS. 1 to 8 show a first embodiment of the present invention. Reference numeral 1 denotes a pedestal, which is formed in a convex spherical shape, is provided with a rectangular opening 1a, and the inside thereof can sufficiently withstand an anchor force. The steel plate 1b is reinforced by combining it vertically and horizontally. (See FIGS. 5 to 6)
Reference numeral 2 denotes a pressure bearing plate, which is provided with a concave curved surface 2a slidably fitted to the convex spherical portion of the pedestal 1 and a circular opening 2b. (See Figs. 7 and 8)
Next, an anchor method having the anchor head structure will be described.
[0013]
The drilling unit H provided the natural ground in G that constitutes the YamaTome in H-beams S 1, (FIG. 1 (b) refer) to insert the tension material 3 in the drilling unit H, (FIG. 1 (b) Reference) After injecting a grout material into the tip fixing portion of the drilled hole portion H and fixing the tip portion of the tensile material 3 to the drilled hole portion H, the base end portion of the tensile material 3 is used as the H-shaped steel S. 1 is inserted through the opening 1a of the pedestal 1 installed (see FIG. 1 (c)), and the tensile material 3 is passed through the opening 2b of the bearing plate 2 and the direction of the tensile material 3 The concave curved surface 2a is slid along the convex spherical surface of the pedestal 1 so as to occupy a position that keeps vertical (see FIG. 1 (d)), and the openings 1a, 2b of the pedestal 1 and the bearing plate 2 The tension member 3 inserted through the bolt is fastened and fixed by the fastening bracket 4 (see FIG. 1 (e)).
YamaTome structure in the embodiment shown in FIG. 2 is composed of a concrete wall S 2, the pressure receiving portion S 3 of the independent structure by steel or concrete plate are constituted in the embodiment shown in FIG.
[0014]
FIGS. 9 to 14 show another embodiment of the present invention. In FIG. 9, reference numeral 11 denotes a tensioning / fixing support plate arranged in contact with the natural ground G, and a pedestal 12 is provided on the support plate 11. While being held at a predetermined position via a holding metal 13 formed of a wedge or the like, a fastening metal 14 for a tension material described later is installed.
9 shows an example in which the holding bearing plate 11 and the pedestal 12 are directly installed on the ground G surface. However, the bearing plate 11 and the pedestal 12 are shown in FIG. Depending on the structure of the pressure support, FIG. 10 (a) shows a case where it is installed on a concrete wall surface, and FIG. 10 (b) shows a case where it is installed on a mountain structure made of H-section steel S.
[0015]
FIG. 11 shows a bearing plate. FIGS. 11 (a) and (d) are square, and (b) and (e) are steel circular main plates each having a tensile material insertion opening 11a, and (c) (f) ), The periphery of the opening 11a of the bearing plate 11 mainly composed of concrete or reinforced concrete is reinforced by the steel plate 11b.
FIG. 12 shows a pedestal, and FIGS. 12 (a) and 12 (e) are composed of a cylindrical body having a circular opening 12a through which a tensile material 15 is penetrated in the center, and FIGS. A circular opening 12a is provided, and FIG. 12 (c) (g) is formed of a semi-cylindrical body having a circular opening 12a through which the tensile material 15 is penetrated. The pedestal shown in FIG. 2 is a pedestal made up of a circular cylinder with a cross section through which the tensile material 15 passes.
[0016]
FIG. 13 shows a holding metal 13 for holding the pedestal 12 at a predetermined position of the bearing plate 11. The bottom surface 13 a in contact with the bearing plate 11 is a flat surface, and the surface 13 b in contact with the pedestal 12 is aligned with the slope or the pedestal surface. It is formed in a curved shape.
FIG. 14 shows a process of an anchor method using the anchor head structure of the present invention. A drilling hole H for inserting a tensile material is excavated from the surface of a ground G generated by cutting or the like (see FIG. )) After inserting the tensile material 15 into the drilled hole H (see FIG. 14 (b)) and injecting grout into the drilled hole H, the bearing plate 11 is inserted into the opening 11a. Install it in the natural ground G. (Refer to FIG. 14 (d)) Further, the pedestal 12 is passed through the tension member 15 through the opening 12a, and the direction of the opening 12a of the pedestal 12 is the same as the direction of the tension member 15. Are installed on the bearing plate 11 and temporarily tightened via the fastening bracket 14. (See Fig. 14 (D))
Next, an appropriate number of holding metal pieces 13 are inserted between the pedestal 12 and the bearing plate 11 so that the pedestal 12 holds a predetermined position (see FIG. 14 (e)). To tension and fix the tension member 15.
[0017]
【The invention's effect】
As described above, the anchor head structure according to the present invention has a columnar or cylindrical pedestal supported by a bearing part disposed in contact with a natural ground, and a holding metal fitting that holds the pedestal on the bearing part. And a fastening bracket for tightening a base end portion that penetrates the columnar or cylindrical pedestal of the tensile material inserted into the drilling hole in the natural ground and having a distal end fixed in the drilling hole to the pedestal. Since the holding metal fitting for holding the pedestal on the pressure bearing portion is constituted by a wedge , the force applied at the anchor head and the anchor force actually acting on the fixing portion can be matched. Therefore, even if the angle formed between the surface of the mountain structure and the direction of the tensile material is not constant, the tension can always be applied in the direction of the tensile material. Further, if the bearing part and the pedestal are made of steel, they can be easily obtained in various sizes according to the purpose and at a relatively low cost. Further, according to the present invention, the holding metal fitting for holding the pedestal in the supporting pressure portion is configured by a neck, thereby simplifying the configuration and improving the workability.
[Brief description of the drawings]
FIGS. 1A, 1B, 1C, and 1E are longitudinal sectional views showing the steps of an embodiment of an anchor method having an anchor head structure according to the present invention.
FIG. 2 is a longitudinal sectional view showing an implementation status of another embodiment of the anchor method.
FIG. 3 is a longitudinal sectional view showing an implementation status of another embodiment of the anchor method.
FIG. 4 is a side view of a pedestal.
5 is a view as seen from the arrow in FIG.
FIG. 6 is a view as viewed from the arrow of FIG.
FIG. 7 is a side view of a bearing plate.
FIG. 8 is a view taken from the direction of the arrows in FIG.
9A and 9B are a plan view and a longitudinal sectional view showing another embodiment of the anchor head structure according to the present invention.
FIGS. 10A and 10B are longitudinal sectional views showing other embodiments of the anchor head structure according to the present invention.
11 (a), (b) and (c) are plan views showing examples of the bearing plate, respectively. (D) (e) and (f) are side views of (a), (b) and (c), respectively. It is.
12 (a), (b), (c) and (d) are plan views showing examples of the pedestal, respectively. (E), (f), (g) and (h) are respectively (b), (b) ( C) A vertical side view of (d).
FIGS. 13A, 13B, and 13C are a plan view, a front view, and a side view of a holding metal fitting, respectively.
14 (a), 14 (b), (c), (d) and (e) are longitudinal sectional views showing the steps of another embodiment of the anchor method having the anchor head structure according to the present invention.
[Explanation of symbols]
C Concrete wall G Ground mountain H Drilling hole S 1 H-shaped steel S 2 Independent structure pressure receiving part 1 Base 1a Opening part 1b Steel plate 2 Bearing plate 2a Concave surface 2b Opening part 3 Tension material 4 Fastening bracket 11 Bearing plate 11a Opening Part 11b Steel plate 12 Pedestal 12a Opening 13 Holding metal fitting 14 Fastening metal fitting 15 Tensile material

Claims (1)

地山に接して配設された支圧部に支持された円柱または円筒状の台座と、
同台座を前記支圧部に保持する保持金具と、
地山内の削孔部に挿入され、先端部が同削孔部内に定着された引張材における前記円柱または円筒状の台座を貫通する基端部を、同台座に緊締する締付金具とよりなり、
前記台座を前記支圧部に保持する保持金具はくさびにより構成されている、
ことを特徴とするアンカー頭部構造。
A columnar or cylindrical pedestal supported by a bearing section disposed in contact with the natural ground;
A holding bracket for holding the pedestal in the bearing section;
It consists of a clamp that tightens the base end of the tensile material that is inserted into the drilling hole in the ground and the tip of which is fixed in the drilling hole, through the cylindrical or cylindrical base. ,
The holding metal fitting for holding the pedestal in the pressure bearing portion is formed by a wedge,
An anchor head structure characterized by that.
JP16785994A 1993-12-27 1994-07-20 Anchor head structure Expired - Fee Related JP3635355B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16785994A JP3635355B2 (en) 1993-12-27 1994-07-20 Anchor head structure

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP33148693 1993-12-27
JP5-331486 1993-12-27
JP16785994A JP3635355B2 (en) 1993-12-27 1994-07-20 Anchor head structure

Publications (2)

Publication Number Publication Date
JPH07233529A JPH07233529A (en) 1995-09-05
JP3635355B2 true JP3635355B2 (en) 2005-04-06

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