JPS6120160Y2 - - Google Patents
Info
- Publication number
- JPS6120160Y2 JPS6120160Y2 JP262382U JP262382U JPS6120160Y2 JP S6120160 Y2 JPS6120160 Y2 JP S6120160Y2 JP 262382 U JP262382 U JP 262382U JP 262382 U JP262382 U JP 262382U JP S6120160 Y2 JPS6120160 Y2 JP S6120160Y2
- Authority
- JP
- Japan
- Prior art keywords
- anchor bolt
- anchor
- borehole
- semi
- protrusions
- 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
Links
- 238000005452 bending Methods 0.000 claims description 2
- 239000000945 filler Substances 0.000 description 7
- 239000004570 mortar (masonry) Substances 0.000 description 6
- 230000002093 peripheral effect Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Piles And Underground Anchors (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Description
【考案の詳細な説明】
本案は地山等における穿孔部に挿入されて同穿
孔部周壁に圧着され、地山等を補強するように構
成されたアンカーボルトの改良に係るものであ
る。[Detailed Description of the Invention] The present invention relates to an improvement of an anchor bolt configured to be inserted into a borehole in a ground, etc., and crimped against the circumferential wall of the borehole, thereby reinforcing the ground, etc.
従来この種のアンカーボルトは母線方向に一定
幅のスリツトを有し、先端部がテーパー部に形成
され、基端部にストツパを具えた円筒状部材に構
成され、アンカーボルトより小径の穿孔部に打込
まれ、前記スリツトの存在によつて弾性的に外部
に拡開しようとする力で、アンカーボルトと穿孔
部の内周壁との間に摩擦力を発生せしめ、引抜耐
力を生起せしめるようにしていた。 Conventionally, this type of anchor bolt has a slit of a constant width in the direction of the generatrix, a tapered tip, and a cylindrical member with a stopper at the base. The force of the anchor bolt being driven in and attempting to expand outward elastically due to the presence of the slit generates a frictional force between the anchor bolt and the inner circumferential wall of the perforated portion, thereby generating a pull-out strength. Ta.
しかしながら前記従来のアンカーボルトにおい
ては、穿孔部の内径がアンカーボルトの外径より
大であると、同アンカーボルトの弾性的拡がりは
生ぜず、穿孔部内周壁との間に摩擦力がないため
極めて危険であり、使用できなかつた。また穿孔
部の内周壁が荒れてしまうと摩擦力が小さくな
り、使用することができなかつた。更にまた摩擦
力に頼るだけではアンカーボルトの穿孔部に対す
る碇着性について信頼度が乏しく、使用範囲が限
定されていた。 However, in the conventional anchor bolt, if the inner diameter of the hole is larger than the outer diameter of the anchor bolt, the anchor bolt will not expand elastically and there will be no frictional force between it and the inner peripheral wall of the hole, which is extremely dangerous. and could not be used. Furthermore, if the inner circumferential wall of the perforated portion becomes rough, the frictional force decreases, making it unusable. Furthermore, relying solely on frictional force results in poor anchoring performance in the perforated portion of the anchor bolt, and the range of use is limited.
またトンネル等にロツクボルト打設する場合、
油圧ドリルの採用により穿孔径が大きくなり、モ
ルタル等の充填材を多く必要とし、上向き孔では
充填材が落下する等の問題が生じる。また孔内に
充填材を填装したあとにボルトを挿入する填充型
ボルトでは、施工が煩雑でボルト打設作業の機械
化ができず、また湧水が多いと充填材が流亡する
惧れがある。 Also, when driving lock bolts in tunnels etc.,
The use of a hydraulic drill increases the diameter of the hole, necessitating a large amount of filler such as mortar, and problems such as the filler falling in upward-facing holes arise. In addition, with filled bolts, in which the bolt is inserted after filling the hole with filler material, the installation is complicated and the bolt driving process cannot be mechanized, and there is a risk that the filler material may wash away if there is a lot of spring water. .
本案はこのような欠点を除去するために提案さ
れたものであつて、半円筒帯状片１の長手方向に
亘つて所定間隔毎に、円周方向に廷び且つ外周側
に膨出した突隆部２を成してなる一双のアンカー
構成用エレメントａ，ａの各自由端縁を衝合し、
同各エレメントａの各自由端縁における相隣る突
隆部２間の直線部３，３同志を溶着ｗしてなるこ
とを特徴とするアンカーボルトに係るものであ
る。 The present invention has been proposed in order to eliminate such drawbacks, and includes protrusions extending in the circumferential direction and bulging toward the outer circumference at predetermined intervals along the longitudinal direction of the semi-cylindrical strip 1. Abutting each free edge of a pair of anchor-constituting elements a, a forming part 2,
This relates to an anchor bolt characterized in that straight portions 3, 3 between adjacent protrusions 2 on each free end edge of each element (a) are welded to each other.
なお図中４は前記一双のアンカー構成用エレメ
ントａ，ａの一端部に配設されたストツパ、５は
他端部に設けられたテーパー部でアンカーボルト
の母線方向と斜交するように切断されてもよく、
穿孔部に挿入し易い形状に形成されている。 In the figure, 4 is a stopper disposed at one end of the pair of anchor-constituting elements a, a, and 5 is a taper section provided at the other end, which is cut obliquely to the generatrix direction of the anchor bolt. It's okay,
It is formed into a shape that can be easily inserted into the hole.
本案は半円筒帯状片１の長手方向に亘つて所定
間隔毎に、円周方向に廷び且つ外周側に膨出し
た突隆部２を曲成してなる一双のアンカー構成用
エレメントａ，ａの各自由端縁を衝接し、同各エ
レメントａの自由端縁における相隣る前記突隆部
２，２間に形成された直線部３，３相互間を溶着
ｗしてアンカーボルトを構成したので、同アンカ
ーボルトには所定間隔毎に、前記両半円筒帯状
片１，１によつて形成された円筒部の直径ｒより
大きい直径Ｒを有する前記両突隆部２，２によつ
て形成された大径部が形成され、かくしてアンカ
ーボルトの外周面には大径部と小径部とが交互に
連続する波形に形成され、且つ大径部の直径方向
両端部には開口部５が形成されることとなる。 The present invention consists of a pair of anchor-constituting elements a, a which are formed by bending protrusions 2 extending in the circumferential direction and bulging toward the outer circumferential side at predetermined intervals along the longitudinal direction of the semi-cylindrical strip 1. The free edges of each element a are brought into contact with each other, and the straight portions 3, 3 formed between the adjacent protrusions 2, 2 on the free edge of each element a are welded together to form an anchor bolt. Therefore, the anchor bolt is formed at predetermined intervals by both protruding parts 2, 2 having a diameter R larger than the diameter r of the cylindrical part formed by the semi-cylindrical strips 1, 1. Thus, the outer peripheral surface of the anchor bolt is formed in a wave shape in which large diameter parts and small diameter parts continue alternately, and openings 5 are formed at both diametrical ends of the large diameter part. It will be done.
従つて本案のアンカーボルトを穿孔部に挿入し
てモルタルを填装すると、前記開口部５及びアン
カーボルト端部より穿孔部内に充填されたモルタ
ルが、穿孔部内周壁面とアンカーボルトの小径部
との間に充填されるので、本案のアンカーボルト
の引抜耐力が飛躍的に増大する。また従来のアン
カーボルトはＣ型断面に形成され、スリツトと反
対側の壁面側には充填材が十分に廻らず、発銹の
惧れがあつたが、本案のアンカーボルトは両面に
開口部を有するため、充填材は十分に充填され、
発銹の惧れがなく永久的なアンカーボルトとして
使用される。 Therefore, when the anchor bolt of the present invention is inserted into the borehole and mortar is loaded, the mortar filled into the borehole from the opening 5 and the end of the anchor bolt spreads between the inner peripheral wall surface of the borehole and the small diameter part of the anchor bolt. Since it is filled in between, the pull-out strength of the anchor bolt of the present invention is dramatically increased. In addition, conventional anchor bolts are formed with a C-shaped cross section, and the filler material does not spread sufficiently to the wall surface opposite to the slit, leading to the risk of rusting, but the anchor bolt of this invention has openings on both sides. Because it has, the filling material is fully filled,
Used as a permanent anchor bolt with no risk of rusting.
また相隣る小径部間に開口部５を有するアンカ
ーボルトは、前記各エレメントａにおける自由端
縁の直線部３，３の溶着部ｗを支点として円周方
向に亘つて強力な弾力性を有するもので、開口部
５におけるアンカーボルトの直径方向の閉縮に対
して強力な抵抗力が生起し、穿孔部内周壁に対す
る摩擦力が飛躍的に増大する。このようにアンカ
ーボルトの弾性が増大されることによつて、同ア
ンカーボルトを構成する前記エレメントａの弾性
を増大させる必要がなく、同エレメントａとして
軟鋼も使用できる。またモルタルが充填されても
鋼管本体と穿孔部内周壁との間隙が少なく、モル
タルの充填量が少なくて済む。更に湧水があつて
も、最初アンカーボルトの大径部外周と穿孔部内
周壁との間に即座に摩擦力が働き、モルタルが前
記小径部と穿孔部内周壁との間に充填されると、
安定した引抜耐力が得られる。 Further, the anchor bolt having the opening 5 between adjacent small diameter portions has strong elasticity in the circumferential direction using the welded portion w of the straight portions 3, 3 of the free end edges of each element a as a fulcrum. Therefore, a strong resistance force is generated against the diametrical closing and contraction of the anchor bolt in the opening 5, and the frictional force against the inner circumferential wall of the perforation increases dramatically. By increasing the elasticity of the anchor bolt in this way, there is no need to increase the elasticity of the element a constituting the anchor bolt, and mild steel can also be used as the element a. Furthermore, even when filled with mortar, the gap between the steel pipe body and the inner circumferential wall of the perforated portion is small, and the amount of mortar filled can be small. Furthermore, even if there is spring water, a frictional force acts immediately between the outer periphery of the large diameter part of the anchor bolt and the inner peripheral wall of the perforated part, and when mortar is filled between the small diameter part and the inner peripheral wall of the perforated part,
Stable pulling strength can be obtained.
また本案のアンカーボルトは摩擦力と充填材に
よる定着力によつて穿孔部に定着されるので信頼
性が高く、孔壁の荒れが生じても本案のアンカー
ボルトは打込みによつて簡単に挿入され、本案の
アンカーボルトはその打込みと充填材の圧入によ
つて穿孔部に定着されるので、アンカーボルトの
定着作業の機械化が可能となる。 In addition, the anchor bolt of the present invention is highly reliable as it is fixed in the borehole by frictional force and the fixing force of the filler. Even if the wall of the hole becomes rough, the anchor bolt of the present invention can be easily inserted by driving it in. Since the anchor bolt of the present invention is fixed in the borehole by driving it in and pressing in the filler, the work of fixing the anchor bolt can be mechanized.
更にまた本案のアンカーボルトは、アンカーボ
ルト構成用エレメントのプレス加工と、両エレメ
ントの溶接だけで簡単に製作され、コストが節減
され経済的である等、本案は多くの利点を有する
ものである。 Furthermore, the anchor bolt of the present invention has many advantages, such as being easily manufactured by simply pressing the anchor bolt constituent elements and welding both elements, reducing costs and being economical.
第１図は本案に係るアンカーボルトの斜面図、
第２図及び第３図は夫々その小径部並に大径部の
縦断面図、第４図はその分解斜面図である。
ａ……アンカーボルト構成用エレメント、１…
…半円筒帯状片、２……突隆部、３……直線部、
ｗ……溶着部。
Figure 1 is a slope view of the anchor bolt related to this proposal.
2 and 3 are longitudinal sectional views of the small diameter portion and the large diameter portion, respectively, and FIG. 4 is an exploded perspective view thereof. a... Anchor bolt configuration element, 1...
...Semi-cylindrical strip, 2... Protruding portion, 3... Straight portion,
w...Welded part.
Claims (1)
に、円周方向に廷び且つ外周側に膨出した突隆部
２を曲成してなる一双のアンカー構成用エレメン
トａ，ａの各自由端縁を衝合し、同各エレメント
ａの各自由端縁における相隣る突隆部２間の直線
部３，３同志を溶着ｗしてなることを特徴とする
アンカーボルト。 Each of a pair of anchor-constituting elements a, a each of which is formed by bending protrusions 2 that extend in the circumferential direction and bulge toward the outer circumferential side at predetermined intervals along the length of the semi-cylindrical strip 1. An anchor bolt characterized in that the free edges abut each other, and the straight portions 3, 3 between adjacent protrusions 2 on each free edge of each element (a) are welded together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP262382U JPS58106499U (en) | 1982-01-14 | 1982-01-14 | anchor bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP262382U JPS58106499U (en) | 1982-01-14 | 1982-01-14 | anchor bolt |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58106499U JPS58106499U (en) | 1983-07-20 |
| JPS6120160Y2 true JPS6120160Y2 (en) | 1986-06-17 |
Family
ID=30015592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP262382U Granted JPS58106499U (en) | 1982-01-14 | 1982-01-14 | anchor bolt |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58106499U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101153760B1 (en) * | 2004-01-28 | 2012-06-13 | 케이에프씨 가부시키가이샤 | Expandable injection bolt and grouting method using same |
-
1982
- 1982-01-14 JP JP262382U patent/JPS58106499U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58106499U (en) | 1983-07-20 |
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