JP2003027482A - Reinforced earth method and reinforcing material - Google Patents
Reinforced earth method and reinforcing materialInfo
- Publication number
- JP2003027482A JP2003027482A JP2001218278A JP2001218278A JP2003027482A JP 2003027482 A JP2003027482 A JP 2003027482A JP 2001218278 A JP2001218278 A JP 2001218278A JP 2001218278 A JP2001218278 A JP 2001218278A JP 2003027482 A JP2003027482 A JP 2003027482A
- Authority
- JP
- Japan
- Prior art keywords
- tubular member
- reinforcing
- hole
- ground
- tubular
- 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
Links
Landscapes
- Piles And Underground Anchors (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
- Earth Drilling (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、例えば、切土、自
然斜面等の地山の法面や、既設の擁壁、盛土の補強に用
いられる補強土工法に利用できる。BACKGROUND OF THE INVENTION The present invention can be applied to, for example, a ground slope such as cut soil or a natural slope, an existing retaining wall, or a reinforced earth method used to reinforce an embankment.
【０００２】[0002]
【背景技術】従来、自然斜面等の地山の法面や、既設の
擁壁、盛土等を補強する方法として補強土工法と呼ばれ
る工法がある。この補強土工法とは、筒部材とこの筒部
材の先端に設けられたビットとを含んで補強材を構成
し、前記筒部材を回転させて前記ビットで地表から地中
に向かって削孔するとともに、筒部材の中を通して前記
ビット近傍から充填材を吐出させて孔内に注入し、前記
充填材が硬化することにより前記筒部材の少なくとも先
端側を地中に係止させ、かつ前記筒部材の基端側を地表
に係止させて、地盤を補強する。これによって、地盤が
弛んだ場合でも、その地表面に筒部材の基端側が係止さ
れているため、この筒部材を介して地表面が地中に支持
され、地表面の崩壊を防止できるようになっている。し
たがって、筒部材には、削孔時の圧縮力や地表面を支持
する引張力に耐えうる強度が要求されるため、従来は、
機械構造用炭素鋼鋼管が用いられている。BACKGROUND ART Conventionally, there is a method called a reinforced earth method as a method for reinforcing natural slopes and other slopes, existing retaining walls, and embankments. The reinforcing earthwork method is a reinforcement member including a tubular member and a bit provided at the tip of the tubular member, and the tubular member is rotated to drill a hole from the surface of the earth toward the ground. At the same time, the filler is discharged from the vicinity of the bit through the tubular member and injected into the hole, and at least the tip side of the tubular member is locked in the ground by hardening the filler, and the tubular member Reinforce the ground by locking the base end of the to the ground surface. As a result, even if the ground is loose, the base end side of the tubular member is locked to the ground surface, so that the ground surface is supported in the ground through this tubular member, and the collapse of the ground surface can be prevented. It has become. Therefore, the tubular member is required to have a strength capable of withstanding the compressive force at the time of drilling and the tensile force for supporting the ground surface.
Carbon steel pipes for machine structures are used.
【０００３】[0003]
【発明が解決しようとする課題】しかし、例えば、固い
地盤を削孔する場合や、地震等により地盤に大きな力が
加わった場合に、筒部材に大きな圧縮力または引張力が
作用することとなり、上述したような機械構造用炭素鋼
鋼管では地盤を補強できない可能性があった。However, for example, when drilling a solid ground, or when a large force is applied to the ground due to an earthquake or the like, a large compressive force or a tensile force acts on the tubular member, There is a possibility that the ground cannot be reinforced by the carbon steel pipe for machine structure as described above.
【０００４】本発明の目的は、固い地盤を補強する場合
や、地盤に大きな力が加わった場合でも、補強できる補
強土工法を提供することにある。It is an object of the present invention to provide a reinforced soil construction method capable of reinforcing a solid ground or a large force applied to the ground.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するた
め、本発明の補強土工法は、次の構成を採用する。請求
項１に記載の補強土工法は、筒部材とこの筒部材の先端
に設けられたビットとを含んで補強材を構成し、前記ビ
ットを回転させて地表から地中に向かって削孔するとと
もに、前記筒部材の中を通して前記ビット近傍から充填
材を吐出させて孔内に注入し、前記充填材が硬化するこ
とにより前記筒部材の少なくとも先端側を地中に係止さ
せ、かつ前記筒部材の基端側を地表に係止させて、地盤
を補強する補強土工法において、前記筒部材は、焼入れ
および焼戻しを行った高強度の中空棒鋼であることを特
徴とする。In order to achieve the above object, the reinforced earthwork method of the present invention adopts the following constitution. In the reinforced earthwork method according to claim 1, a reinforcing member is configured to include a tubular member and a bit provided at a tip of the tubular member, and the bit is rotated to drill a hole from the ground surface toward the ground. At the same time, the filling material is discharged from the vicinity of the bit through the tubular member and injected into the hole, and at least the tip side of the tubular member is locked in the ground by hardening the filling material, and In the reinforced earth construction method for reinforcing the ground by locking the base end side of the member to the ground surface, the tubular member is characterized by being a high-strength hollow steel bar that has been quenched and tempered.
【０００６】ここで、焼入れおよび焼戻しを行う方法と
しては、高周波加熱、炉加熱等が挙げられる。この発明
によれば、補強土工法に用いる筒部材を、焼入れおよび
焼戻しを行った高強度の中空棒鋼としたので、つまり、
焼入れにより硬度や抗張力を増大させ、焼戻しにより靱
性を向上させたので、筒部材の圧縮力および引張力に対
する構造耐力を向上できる。補強土工法は地中の所定箇
所から筒部材を介して地表面を支持するため、筒部材の
構造耐力を向上させることによって、固い地盤を補強す
る場合や、地盤に大きな力が加わった場合でも、地盤を
確実に補強できる。[0006] Here, examples of the method of quenching and tempering include high-frequency heating and furnace heating. According to this invention, since the tubular member used in the reinforced earth construction method is a high-strength hollow steel bar that has been quenched and tempered, that is,
Since the hardness and tensile strength are increased by quenching and the toughness is improved by tempering, the structural resistance of the tubular member against the compressive force and tensile force can be improved. The reinforced earth method supports the ground surface from a predetermined location in the ground through the tubular member, so by improving the structural strength of the tubular member, it is possible to reinforce a solid ground or even when a large force is applied to the ground. The ground can be reliably reinforced.
【０００７】請求項２に記載の補強材は、請求項１に記
載の補強土工法に用いられる補強材において、前記筒部
材は、その外周面が雄ねじ形状とされていることを特徴
とする。この発明によれば、筒部材の外周面に雄ねじ形
状を形成したので、充填材を孔内に充填させた際に、ね
じ形状の凹凸面に充填材が入り込むから、筒部材の付着
力が増大して確実に充填材に係合されることとなり、補
強材の性能を向上できる。The reinforcing material described in claim 2 is the reinforcing material used in the reinforcing earthwork method according to claim 1, characterized in that the outer peripheral surface of the cylindrical member has a male screw shape. According to the present invention, since the male screw shape is formed on the outer peripheral surface of the tubular member, when the filler is filled in the hole, the filler enters the thread-shaped uneven surface, so that the adhesive force of the tubular member is increased. As a result, the filler is reliably engaged, and the performance of the reinforcing material can be improved.
【０００８】請求項３に記載の補強材は、請求項２に記
載の補強材において、前記筒部材同士を連結する略円筒
形状の継手部材を備え、前記筒部材は、前記継手部材の
両端側内周に螺合されることを特徴とする。この発明に
よれば、継手部材の両端側内周に筒部材を螺合したの
で、筒部材同士が継手部材を介して確実に連結される。
つまり、筒部材にかかる力が継手部材を介して確実に伝
達されるため、例えば、筒部材の先端を地中奥深くに設
けることも可能となり、補強材の構造設計の自由度を向
上できる。A reinforcing member according to a third aspect is the reinforcing member according to the second aspect, further comprising a joint member having a substantially cylindrical shape for connecting the tubular members to each other, the tubular member including both end sides of the joint member. It is characterized by being screwed to the inner circumference. According to the present invention, since the tubular members are screwed into the inner circumferences of both ends of the joint member, the tubular members are reliably connected to each other via the joint member.
That is, since the force applied to the tubular member is reliably transmitted through the joint member, for example, the tip of the tubular member can be provided deep in the ground, and the degree of freedom in structural design of the reinforcing member can be improved.
【０００９】請求項４に記載の補強材は、請求項３に記
載の補強材において、前記継手部材の外周部には、その
略中央から両端側に向かって下がるテーパが形成されて
いることを特徴とする。この発明によれば、継手部材の
外周部にその略中央から両端側に向かって下がるテーパ
を形成したので、筒部材を孔に挿入する際に継手部材に
引っかかりがないから、筒部材を円滑に挿入でき、補強
材の施工能率を向上できる。また、テーパによって継手
部材に角部が少なくなるから、充填材を孔内に確実に充
填して、すの発生を抑えることができ、補強材を確実に
施工できる。According to a fourth aspect of the present invention, there is provided the reinforcement material according to the third aspect, wherein the outer peripheral portion of the joint member is formed with a taper which is lowered from substantially the center thereof toward both end sides. Characterize. According to this invention, since the taper is formed on the outer peripheral portion of the joint member, the taper descending from substantially the center toward both end sides, so that the joint member does not get caught when the tubular member is inserted into the hole, so that the tubular member can be smoothly moved. It can be inserted and the construction efficiency of the reinforcing material can be improved. Further, since the joint member has fewer corners due to the taper, it is possible to surely fill the hole with the filling material, suppress the generation of soot, and surely apply the reinforcing material.
【００１０】請求項５に記載の補強材は、請求項３また
は４に記載の補強材において、前記継手部材は、その内
部空間をそれぞれ一端側の開口を含む２つの空間に仕切
る仕切部を備え、この仕切部に当接するまで前記筒部材
がねじ込まれるとともに、前記仕切部の略中央には前記
筒部材同士を連通する連通孔が設けられていることを特
徴とする。A reinforcing member according to a fifth aspect is the reinforcing member according to the third or fourth aspect, in which the joint member has a partition portion for partitioning an internal space thereof into two spaces each including an opening on one end side. The tubular member is screwed in until it comes into contact with the partition portion, and a communication hole for communicating the tubular members with each other is provided substantially at the center of the partition portion.
【００１１】この発明によれば、２本の筒部材がそれぞ
れ仕切部に当接するまで両端からねじ込むだけで筒部材
を位置決めできるから、筒部材と継手部材との接続状況
を確認する必要がなく、補強材の施工能率を向上でき
る。また、仕切部に連通孔を設けてこの連通孔で筒部材
同士を連通したので、一方の筒部材から吐出された充填
材が連通孔を通って他方の筒部材に流入するから、充填
材を円滑に孔内に注入でき、補強材を確実に施工でき
る。この時、仕切部と筒部材の一端面との間に隙間がな
いから、筒部材の平坦部と継手部材の内周面との間に隙
間ができても、充填材の漏出を抑制できる。According to the present invention, the two tubular members can be positioned by simply screwing them from both ends until they come into contact with the partition, so that it is not necessary to check the connection state between the tubular member and the joint member. The construction efficiency of the reinforcing material can be improved. In addition, since a communication hole is provided in the partition and the cylinder members are communicated with each other through this communication hole, the filler discharged from one cylinder member flows into the other cylinder member through the communication hole, so It can be injected smoothly into the hole, and the reinforcing material can be applied reliably. At this time, since there is no gap between the partition portion and the one end surface of the tubular member, even if a gap is created between the flat portion of the tubular member and the inner peripheral surface of the joint member, leakage of the filler can be suppressed.
【００１２】請求項６に記載の補強材は、請求項５に記
載の補強材において、前記仕切部の連通孔の孔径は、前
記筒部材の中空部の最大孔径より大きいことを特徴とす
る。この発明によれば、仕切部の連通孔の孔径を筒部材
の中空部の最大孔径より大きくしたので、筒部材の中空
部の断面形状が偏平形状であっても、連通孔が筒部材の
中空部を塞いでしまうことがないから、充填材が筒部材
の中空部および連通孔を円滑に流れることとなり、補強
材を確実に施工できる。The reinforcing material according to a sixth aspect is the reinforcing material according to the fifth aspect, characterized in that the hole diameter of the communication hole of the partition portion is larger than the maximum hole diameter of the hollow portion of the tubular member. According to this invention, since the hole diameter of the communication hole of the partition portion is made larger than the maximum hole diameter of the hollow portion of the tubular member, even if the hollow portion of the tubular member has a flat cross-sectional shape, the through hole of the tubular member is hollow. Since the filling material is not blocked, the filling material smoothly flows through the hollow portion and the communication hole of the tubular member, and the reinforcing material can be reliably applied.
【００１３】請求項７に記載の補強材は、請求項２から
６のいずれかに記載の補強材において、前記筒部材は、
熱間圧延により形成され、断面が２つの平坦部と２つの
湾曲部とからなる偏平形状であって、この筒部材の外周
に嵌め込まれる溝を有する鍔部材を備え、この溝は、前
記湾曲部に係合される第１溝部と、前記平坦部に嵌合さ
れる第２溝部とを備えていることを特徴とする。The reinforcing material according to claim 7 is the reinforcing material according to any one of claims 2 to 6, wherein the tubular member is
A flange member, which is formed by hot rolling and has a flat cross-section with two flat portions and two curved portions, is provided with a groove fitted into the outer periphery of the tubular member. And a second groove portion fitted to the flat portion.
【００１４】この発明によれば、筒部材の断面を２つの
平坦部と２つの湾曲部とからなる偏平形状とし、この筒
部材に鍔部材を取り付けたので、鍔部材を迂回する充填
材が土と付着しやすくなるため、充填材を筒部材の全長
に亘って充填でき、地盤を確実に補強できる。また、鍔
部材が筒部材と孔壁との間のスペーサとなるので、充填
材を筒部材の全周に亘って充填でき、地盤を確実に補強
できる。また、この時、筒部材の湾曲部に係合される第
１溝部と、筒部材の平坦部に嵌合される第２溝部とを設
けたので、鍔部材が筒部材から外れることがなく、削孔
時の振動に十分耐えることができ、補強材を確実に施工
できる。According to the present invention, since the tubular member has a flat cross-section having two flat portions and two curved portions, and the collar member is attached to the tubular member, the filler that bypasses the collar member is soil. Since it becomes easy to adhere, the filler can be filled over the entire length of the tubular member, and the ground can be reliably reinforced. Moreover, since the collar member serves as a spacer between the tubular member and the hole wall, the filler can be filled over the entire circumference of the tubular member, and the ground can be reliably reinforced. Further, at this time, since the first groove portion that is engaged with the curved portion of the tubular member and the second groove portion that is fitted into the flat portion of the tubular member are provided, the flange member does not come off from the tubular member, It can withstand vibrations during drilling and can reliably install reinforcements.
【００１５】請求項８に記載の補強材は、請求項７に記
載の補強材において、前記鍔部材は、前記溝の第２溝部
で２つの鍔部材片に分割可能とされていることを特徴と
する。この発明によれば、鍔部材をその第２溝部で２つ
の鍔部材片に分割可能としたので、それぞれの鍔部材片
を筒部材の湾曲部側から差し込んで連結するだけで容易
に鍔部材を形成できるから、補強材の施工能率を向上で
きる。この時、鍔部材片は、１つの第１溝部とこの第１
溝部を挟む第２溝部とを含んで構成されるから、鍔部材
片を筒部材の湾曲部側から差し込むだけで、その第１溝
部で湾曲部の雄ねじ形状部分に係合されるとともに、そ
の第２溝部で平坦部に嵌合される。つまり、第１溝部で
筒部材の長さ方向への移動が規制され、第２溝部で鍔部
材片の回転が規制されることとなり、確実に筒部材に取
り付けることができ、補強材を容易かつ確実に施工でき
る。The reinforcing material according to an eighth aspect is the reinforcing material according to the seventh aspect, wherein the flange member can be divided into two flange member pieces at the second groove portion of the groove. And According to the present invention, the flange member can be divided into two flange member pieces by the second groove portion thereof, so that the flange member can be easily inserted by connecting the respective flange member pieces from the curved portion side of the tubular member. Since it can be formed, the construction efficiency of the reinforcing material can be improved. At this time, the collar member piece has one first groove portion and this first groove portion.
Since the second groove portion sandwiching the groove portion is included, it is possible to engage the male screw-shaped portion of the bending portion with the first groove portion by simply inserting the flange member piece from the bending portion side of the tubular member, and The two groove portions are fitted to the flat portion. That is, the movement of the tubular member in the longitudinal direction is regulated by the first groove portion, and the rotation of the flange member piece is regulated by the second groove portion, so that the tubular member can be reliably attached to the tubular member, and the reinforcing material can be easily and easily provided. Can be reliably constructed.
【００１６】請求項９に記載の補強材は、請求項２から
６のいずれかに記載の補強材において、前記筒部材は、
転造により形成された断面円形状であって、この筒部材
の外周に嵌め込まれる溝部を有する鍔部材と、前記筒部
材の外周でかつ前記鍔部材の基端側に設けられ前記鍔部
材の回転を規制する回転規制部材とを備えていることを
特徴とする。この発明によれば、筒部材を断面円形状と
し、この筒部材に鍔部材を取り付けたので、鍔部材によ
って充填材が孔内を流動するのを防止できるから、充填
材を筒部材の全長に亘って充填でき、地盤を確実に補強
できる。また、鍔部材が筒部材と孔壁との間のスペーサ
となるので、充填材を筒部材の全周に亘って充填でき、
地盤を確実に補強できる。また、この時、鍔部材の回転
を規制する回転規制部材を設けたので、削孔時の振動や
充填材の流動によって鍔部材が回転して筒部材の基端側
に移動することがないから、補強材を確実に施工でき
る。The reinforcing material according to claim 9 is the reinforcing material according to any one of claims 2 to 6, wherein the tubular member is
A flange member having a circular cross section formed by rolling and having a groove portion fitted into the outer periphery of the tubular member, and a rotation of the flange member provided on the outer periphery of the tubular member and on the proximal end side of the flange member. And a rotation restricting member for restricting the rotation. According to this invention, since the tubular member has a circular cross-section and the flange member is attached to the tubular member, it is possible to prevent the filler from flowing in the hole by the flange member. It can be filled all over, and the ground can be reliably reinforced. Further, since the flange member serves as a spacer between the tubular member and the hole wall, the filling material can be filled over the entire circumference of the tubular member,
The ground can be reliably reinforced. Further, at this time, since the rotation restricting member for restricting the rotation of the flange member is provided, the flange member does not rotate and move to the base end side of the tubular member due to vibration at the time of drilling and the flow of the filler. , Reinforcement material can be installed reliably.
【００１７】請求項１０に記載の補強材は、請求項９に
記載の補強材において、前記鍔部材は、前記溝部で２つ
の鍔部材片に分割可能とされていることを特徴とする。
この発明によれば、鍔部材をその溝部で２つの鍔部材片
に分割可能としたので、それぞれの鍔部材片を筒部材の
側面から差し込んで連結するだけで容易に鍔部材を形成
できるから、補強材の施工能率を向上できる。According to a tenth aspect of the present invention, in the reinforcing material according to the ninth aspect, the collar member can be divided into two collar member pieces by the groove portion.
According to this invention, since the flange member can be divided into two flange member pieces by the groove portion thereof, the flange member can be easily formed only by inserting and connecting the respective flange member pieces from the side surface of the tubular member. The construction efficiency of the reinforcing material can be improved.
【００１８】請求項１１に記載の補強材は、請求項１か
ら１０のいずれかに記載の補強材において、前記ビット
は、互いに交差する第１直線状部材と第２直線状部材と
を有する保持部材と、この保持部材の正面に設けられた
削孔用チップとを備え、前記第１直線状部材と前記第２
直線状部材とは非直角で交差していることを特徴とす
る。この発明によれば、互いに対向する第１直線状部材
と第２直線状部材との間から削孔用チップで削られた土
塊が後方に送られることになるが、第１直線状部材と第
２直線状部材との間が非直角、例えば、８０度と１００
度であることから、大きな土塊は交差角度が１００度と
なる第１直線状部材と第２直線状部材との間のスペース
から後方に送られることになる。そのため、大きな土塊
であっても、大きな交差角度のスペースから後方に送ら
れるので、削孔効果を大きなものにできる。The reinforcing material according to claim 11 is the reinforcing material according to any one of claims 1 to 10, wherein the bit has a first linear member and a second linear member that intersect with each other. A member and a drilling tip provided on the front surface of the holding member, the first linear member and the second linear member
It is characterized in that it intersects with the linear member at a non-right angle. According to the present invention, the earth mass cut by the drilling tip is sent backward from between the first straight member and the second straight member facing each other. Non-perpendicular between two linear members, for example, 80 degrees and 100
Since it is in degrees, a large lump of soil is sent backward from the space between the first linear member and the second linear member where the intersection angle is 100 degrees. Therefore, even a large lump of soil can be sent rearward from a space with a large intersection angle, so that the drilling effect can be enhanced.
【００１９】請求項１２に記載の補強材は、請求項１か
ら１１のいずれかに記載の補強材において、前記ビット
は、その内部に削孔と同時に充填材を充填するための孔
部と、削孔のために空気を流通させる孔部とを兼用した
孔部を備えたことを特徴とする。この発明によれば、孔
部が同時注入方式用の孔部と空気削孔用孔部とを兼用す
ることから、１つのビットで２種類の用途に利用できる
ことになり、部品点数の減少を図ることができる。A reinforcement material according to a twelfth aspect is the reinforcement material according to any one of the first to eleventh aspects, wherein the bit has a hole portion for filling a filling material into the inside thereof at the same time as drilling. It is characterized in that it is provided with a hole portion which also serves as a hole portion for circulating air for drilling. According to the present invention, since the hole portion serves both as the hole portion for the simultaneous injection method and the hole portion for air drilling, one bit can be used for two types of applications, and the number of parts can be reduced. be able to.
【００２０】[0020]
【発明の実施の形態】以下、本発明の実施形態を図面に
基づいて説明する。図１には、本発明の一実施形態に係
る補強材１０が適用された法面２の断面図が示されてい
る。法面２は、掘削重機等で地盤１を掘削することによ
り形成されたものであって、その全面に亘って厚さ約５
０ｍｍのコンクリート層３が設けられている。コンクリ
ート層３の水平方向および勾配方向の一定間隔おきに
は、法面２に略垂直でかつ地盤１の内部に向かって補強
材１０が設けられている。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a sectional view of a slope 2 to which a reinforcing material 10 according to an embodiment of the present invention is applied. The slope 2 is formed by excavating the ground 1 with a heavy excavator or the like, and has a thickness of about 5 over the entire surface.
A 0 mm concrete layer 3 is provided. Reinforcing members 10 are provided at regular intervals in the horizontal direction and the gradient direction of the concrete layer 3 and are substantially perpendicular to the slope 2 and toward the inside of the ground 1.
【００２１】図２には、補強材１０の断面図が示されて
いる。補強材１０は、孔４の内部に埋設されており、そ
の全長に亘って孔４との間に充填材５が充填されて硬化
することによって、全長に亘って地中に係止されるとと
もに、その基端部が地表のコンクリート層３に係止され
ている。その結果、法面２は、コンクリート層３、補強
材１０、および充填材５を介して地盤１の地中に支持さ
れて補強されている。補強材１０は、所定長さを有する
複数の筒部材１１と、各筒部材１１同士を連結する継手
部材１２と、筒部材１１の先端に設けられたビット１３
と、筒部材１１の外周に取り付けられた鍔部材１４とを
備えている。また、補強材１０の基端部には、ナット６
が螺合され、このナット６に係合されかつコンクリート
層３に埋設されたプレート７が設けられている。FIG. 2 shows a sectional view of the reinforcing member 10. The reinforcing material 10 is embedded in the hole 4, and the filler 5 is filled between the hole 4 and the hole 4 along its entire length and hardened, so that the reinforcing material 10 is locked in the ground for the entire length. , Its base end is locked to the concrete layer 3 on the ground surface. As a result, the slope 2 is supported and reinforced in the ground of the ground 1 through the concrete layer 3, the reinforcing material 10, and the filling material 5. The reinforcing member 10 includes a plurality of tubular members 11 each having a predetermined length, a joint member 12 that connects the tubular members 11 to each other, and a bit 13 provided at the tip of the tubular member 11.
And a collar member 14 attached to the outer periphery of the tubular member 11. In addition, the nut 6 is attached to the base end portion of the reinforcing member 10.
There is provided a plate 7 which is screwed, engaged with the nut 6 and embedded in the concrete layer 3.
【００２２】図３（Ａ）および（Ｂ）には、筒部材１１
の側面図および断面図が示されている。筒部材１１は、
高周波加熱により焼入れおよび焼戻しを行った高強度の
中空棒鋼であって、その断面が２つの平坦部２１と２つ
の湾曲部２２とからなる偏平形状とされている。また、
湾曲部２２の外周面は、熱間圧延により形成された雄ね
じ形状とされている。なお、焼入れおよび焼戻しを行う
方法としては、高周波加熱に限らず、炉加熱等で行って
もよい。ここで、高強度の中空棒鋼とは、ＰＣ棒鋼と同
じ機械的性質を有するものであり、例えば、引張強さが
１０３０Ｎ／mm2以上のものが挙げられる。In FIGS. 3A and 3B, the tubular member 11 is shown.
A side view and a cross-sectional view of is shown. The tubular member 11 is
It is a high-strength hollow steel bar that has been quenched and tempered by high-frequency heating, and has a flat cross section with two flat portions 21 and two curved portions 22. Also,
The outer peripheral surface of the curved portion 22 has a male screw shape formed by hot rolling. The method of quenching and tempering is not limited to high frequency heating, but may be furnace heating or the like. Here, the high-strength hollow steel bar has the same mechanical properties as PC steel bar, and examples thereof include those having a tensile strength of 1030 N / mm 2 or more.
【００２３】図４（Ａ）および（Ｂ）には、継手部材１
２の断面図および正面図が示されている。継手部材１２
は、略円筒形状であって、その外周部には略中央から両
端側に向かって下がるテーパ２５が形成され、その内周
部全周には雌ねじ形状が形成されている。また、継手部
材１２は、その内部には内部空間をそれぞれ一端側の開
口を含む２つの空間に仕切る仕切部２３を備え、仕切部
２３の略中央には前記仕切られた２つの空間を連通する
連通孔２４が設けられている。4A and 4B, the joint member 1 is shown.
A sectional view and a front view of 2 are shown. Joint member 12
Has a substantially cylindrical shape, and a taper 25 is formed on the outer peripheral portion thereof so as to decrease from the substantially center toward both ends, and a female screw shape is formed on the entire inner peripheral portion. Further, the joint member 12 is provided with a partition part 23 that partitions the internal space into two spaces each including an opening on one end side, and the partition part 23 communicates the two partitioned spaces approximately at the center thereof. A communication hole 24 is provided.
【００２４】継手部材１２の両端側内周には、筒部材１
１が仕切部２３に当接するまでねじ込まれており、仕切
部２３の連通孔２４によって、前記筒部材１１同士が連
通されている。ここで、この連通孔２４の孔径は、筒部
材１１の中空部の最大孔径より大きく形成されており、
筒部材１１の中空部を仕切部２３が塞ぐことがないよう
になっている。また、筒部材１１の先端部はテーパ状に
形成されており、そのテーパ状先端が連通孔２４の開口
部に周方向に渡って当接される。これにより、充填材が
連通孔２４の外部に漏出しないようになっている。な
お、連通孔２４をテーパ状に形成し、このテーパ状の連
通孔２４に筒部材１１のテーパ状先端全面が密着するよ
うにしてもよい。The cylindrical member 1 is provided on the inner circumference of both ends of the joint member 12.
1 is screwed in until it comes into contact with the partition portion 23, and the tubular members 11 are communicated with each other by the communication hole 24 of the partition portion 23. Here, the hole diameter of the communication hole 24 is formed to be larger than the maximum hole diameter of the hollow portion of the tubular member 11.
The partition portion 23 does not block the hollow portion of the tubular member 11. Further, the tip end portion of the tubular member 11 is formed in a tapered shape, and the tapered tip end is brought into contact with the opening portion of the communication hole 24 in the circumferential direction. This prevents the filler from leaking to the outside of the communication hole 24. The communication hole 24 may be formed in a tapered shape so that the entire tapered tip of the tubular member 11 is in close contact with the tapered communication hole 24.
【００２５】図５にはビット１３の詳細な構造が示され
ている。図５（Ａ）はビット１３の側断面図であり、図
５（Ｂ）は図５（Ａ）のB-B線に沿う矢視図であり、図
５（Ｃ）は図５（Ａ）のC-C線に沿う矢視図である。こ
れらの図において、ビット１３は、互いに交差する第１
直線状部材１３Ａと、第２直線状部材１３Ｂと、これら
の第１および第２直線状部材１３Ａ，１３Ｂの基端側に
設けられた筒状の取付部１３Ｃとを有する正面略十字状
の保持部材１３Ｄと、この保持部材１３Ｄの正面に設け
られた削孔用チップ１３Ｅとを備えた構成である。The detailed structure of the bit 13 is shown in FIG. 5 (A) is a side sectional view of the bit 13, FIG. 5 (B) is a view taken along the line BB of FIG. 5 (A), and FIG. 5 (C) is CC of FIG. 5 (A). It is an arrow view along a line. In these figures, bit 13 is the first crossing one another
Front-side substantially cross-shaped holding having a linear member 13A, a second linear member 13B, and a cylindrical mounting portion 13C provided on the base end side of these first and second linear members 13A, 13B This is a configuration including a member 13D and a drilling tip 13E provided on the front surface of the holding member 13D.
【００２６】第１直線状部材１３Ａと第２直線状部材１
３Ｂとは非直角、図５（Ｂ）では、交差角度α１（＞９
０度）が例えば１００度、交差角度α２（＜９０度）が
例えば８０度で交差している。これらの第１直線状部材
１３Ａと第２直線状部材１３Ｂとの間のスペースから削
孔用チップ１３Ｅで削られた土塊が後方に送られる。保
持部材１３Ｄは、その内部に、筒部材１１の内部と連通
するとともに外部に開口された孔部１３Ｆが形成されて
いる。First linear member 13A and second linear member 1
3B is non-perpendicular, and in FIG. 5B, the crossing angle α1 (> 9
For example, 0 degree is 100 degrees and the intersection angle α2 (<90 degrees) is 80 degrees. From the space between the first linear member 13A and the second linear member 13B, the soil mass scraped by the drilling tip 13E is sent backward. The holding member 13D has a hole 13F formed therein, which communicates with the inside of the tubular member 11 and is opened to the outside.
【００２７】この孔部１３Ｆは削孔と同時に充填材を充
填するための孔部と、削孔のために空気を流通させる孔
部とを兼用したものである。つまり、本実施形態では、
削孔作業と同時に充填材５を筒部材１１及びビット１３
の内部から削った孔に注入する場合（以下に詳細に説
明）に利用できる他、筒部材１１及びビット１３の内部
から空気を注入しながら削孔作業を行い、この削孔作業
の後に充填材５を削った孔に注入する場合にも利用でき
る。The hole portion 13F serves both as a hole portion for simultaneously filling the filler and as a hole portion for allowing air to flow therethrough for the hole making. That is, in this embodiment,
At the same time as the drilling work, the filling material 5 is attached to the tubular member 11 and the bit 13.
It can be used for injecting into a hole drilled from the inside of the drill (described in detail below), and also performs the drilling work while injecting air from the inside of the tubular member 11 and the bit 13, and after this drilling work, the filler material It can also be used when pouring 5 into a shaved hole.
【００２８】図６（Ａ）および（Ｂ）には、鍔部材１４
の断面図および正面図が示されている。鍔部材１４は、
筒部材１１の外周に嵌め込まれる溝２６を有し、この溝
２６は、湾曲部２２に係合される第１溝部２７と、平坦
部２１に嵌合される第２溝部２８とを備えている。鍔部
材１４は、その溝２６の第２溝部２８で鍔部材片１５に
分割可能とされている。6A and 6B, the collar member 14 is shown.
A cross-sectional view and a front view are shown. The collar member 14 is
It has a groove 26 that is fitted on the outer periphery of the tubular member 11, and this groove 26 is provided with a first groove portion 27 that is engaged with the curved portion 22 and a second groove portion 28 that is fitted with the flat portion 21. . The flange member 14 can be divided into the flange member pieces 15 at the second groove portion 28 of the groove 26.
【００２９】以上のような補強材１０の施工方法は、以
下のようになる。先ず、図７（Ａ）に示すように、掘削
重機によって、地盤１の所定深さ（約１．５Ｍ程度）の
掘削を行って、法面２の一部を露出させる。掘削した部
分の底面は整地しておく。この整地した底面上に、図７
（Ｂ）に示すように、吹き付け機を設置し、法面２にコ
ンクリートの吹き付け施工を行って、法面２を仮保護す
る。The construction method of the reinforcing material 10 as described above is as follows. First, as shown in FIG. 7 (A), the excavation heavy equipment excavates the ground 1 to a predetermined depth (about 1.5 M) to expose a part of the slope 2. The bottom of the excavated part should be leveled. On this leveled bottom,
As shown in (B), a spraying machine is installed, and concrete is sprayed on the slope 2 to temporarily protect the slope 2.
【００３０】続いて、図７（Ｃ）に示すように、削孔機
を設置し、この削孔機を法面２に垂直な方向に固定す
る。次に、ビット１３を回転させて法面２から地中に向
かって削孔して孔４を形成するとともに、筒部材１１の
中を通してビット１３から充填材５を吐出させて孔４内
に注入する。この作業は、予め鍔部材１４を取り付けた
筒部材１１を複数本用意しておき、この筒部材１１を継
手部材１２を用いて順次連結しながら行う。Subsequently, as shown in FIG. 7C, a hole drilling machine is installed, and the hole drilling machine is fixed in a direction perpendicular to the slope 2. Next, the bit 13 is rotated to form a hole 4 by drilling from the slope 2 toward the ground, and the filling material 5 is discharged from the bit 13 through the tubular member 11 and injected into the hole 4. To do. This work is performed while preparing a plurality of tubular members 11 to which the flange members 14 are attached in advance and sequentially connecting the tubular members 11 using the joint members 12.
【００３１】削孔作業が完了すると、補強材１０は、そ
の基端部が法面２から露出した状態となるため、この基
端部にプレート７を取り付けてナット６を螺合する。そ
の後、仮保護された法面２上にコンクリートを打設する
ことにより、ナット６、プレート７を含むコンクリート
層３を形成する。以上のような作業を繰り返すことによ
って、所定の深さまで補強材１０を施工できる。When the boring work is completed, the base end of the reinforcing member 10 is exposed from the slope 2. Therefore, the plate 7 is attached to the base end and the nut 6 is screwed. Then, concrete is cast on the temporarily protected slope 2 to form the concrete layer 3 including the nut 6 and the plate 7. By repeating the above work, the reinforcing material 10 can be applied to a predetermined depth.
【００３２】したがって、本実施形態によれば以下の効
果がある。
（１）補強土工法に用いる筒部材１１を、焼入れおよび
焼戻しを行った高強度の中空棒鋼としたので、つまり、
焼入れにより硬度や抗張力を増大させ、焼戻しにより靱
性を向上させたので、筒部材１１の圧縮力および引張力
に対する構造耐力を向上できる。補強土工法は地中の所
定箇所から筒部材１１を介して地表面を支持するため、
筒部材１１の構造耐力を向上させることによって、固い
地盤を補強する場合や、地盤１に大きな力が加わった場
合でも、地盤１を確実に補強できる。Therefore, according to this embodiment, the following effects are obtained. (1) Since the tubular member 11 used in the reinforced earth method is a high-strength hollow steel bar quenched and tempered,
Since the hardness and tensile strength are increased by quenching and the toughness is improved by tempering, the structural resistance of the tubular member 11 against the compressive force and the tensile force can be improved. Since the reinforced earth method supports the ground surface from a predetermined place in the ground through the tubular member 11,
By improving the structural yield strength of the tubular member 11, the ground 1 can be reliably reinforced even when reinforcing the hard ground or when a large force is applied to the ground 1.
【００３３】（２）筒部材１１の外周面に雄ねじ形状を
形成したので、充填材５を孔４内に充填させた際に、ね
じ形状の凹凸面に充填材５が入り込むから、筒部材１１
の付着力が増大して確実に充填材５に係合されることと
なり、補強材１０の性能を向上できる。(2) Since the male screw shape is formed on the outer peripheral surface of the tubular member 11, when the filling material 5 is filled in the hole 4, the filling material 5 enters the uneven surface of the screw shape.
The adhesive force of is increased and is reliably engaged with the filling material 5, so that the performance of the reinforcing material 10 can be improved.
【００３４】（３）継手部材１２の両端側内周に筒部材
１１を螺合したので、筒部材１１同士が継手部材１２を
介して確実に連結される。つまり、筒部材１１にかかる
力が継手部材１２を介して確実に伝達されるため、例え
ば、筒部材の先端を地中奥深くに設けることも可能とな
り、補強材１０の構造設計の自由度を向上できる(3) Since the tubular members 11 are screwed into the inner circumferences of both ends of the joint member 12, the tubular members 11 are reliably connected to each other via the joint member 12. That is, since the force applied to the tubular member 11 is reliably transmitted through the joint member 12, for example, the tip of the tubular member can be provided deep in the ground, and the degree of freedom in structural design of the reinforcing member 10 is improved. it can
【００３５】（４）継手部材１２の外周部にその略中央
から両端側に向かって下がるテーパ２５を形成したの
で、筒部材１１を孔に挿入する際に継手部材１２に引っ
かかりがないから、筒部材を円滑に挿入でき、補強材１
０の施工能率を向上できる。また、テーパ２５によって
継手部材１２に角部が少なくなるから、充填材５を孔内
に確実に充填して、すの発生を抑えることができ、補強
材を確実に施工できる。(4) Since the taper 25 is formed on the outer peripheral portion of the joint member 12 so as to decrease from the substantially center thereof toward both ends, the joint member 12 is not caught when it is inserted into the hole. The member can be inserted smoothly and the reinforcing material 1
The construction efficiency of 0 can be improved. Further, since the joint member 12 has fewer corners due to the taper 25, it is possible to reliably fill the hole with the filling material 5 and suppress the generation of soot, and to reliably apply the reinforcing material.
【００３６】（５）２本の筒部材１１をそれぞれ仕切部
２３に当接するまで両端からねじ込むだけで筒部材１１
を位置決めできるから、筒部材１１と継手部材１２との
接続状況を確認する必要がなく、補強材の施工能率を向
上できる。(5) The two tubular members 11 are simply screwed in from both ends until they come into contact with the partition 23, respectively.
Since it is possible to position, it is not necessary to confirm the connection state between the tubular member 11 and the joint member 12, and the construction efficiency of the reinforcing material can be improved.
【００３７】（６）仕切部２３に連通孔２４を設けてこ
の連通孔２４で筒部材１１同士を連通したので、一方の
筒部材１１から吐出された充填材５が連通孔２４を通っ
て他方の筒部材１１に流入するから、充填材５を円滑に
孔４内に注入でき、補強材１０を確実に施工できる。こ
の時、仕切部２３と筒部材１１の一端面との間には隙間
ができないから、筒部材１１の平坦部２１と継手部材１
２の内周面との間に隙間ができても、充填材の漏出を抑
制できる。(6) Since the partition portion 23 is provided with the communication hole 24 and the cylinder members 11 are communicated with each other through the communication hole 24, the filler 5 discharged from one cylinder member 11 passes through the communication hole 24 and the other. Since it flows into the tubular member 11, the filling material 5 can be smoothly injected into the hole 4, and the reinforcing material 10 can be reliably installed. At this time, since there is no gap between the partition portion 23 and the one end surface of the tubular member 11, the flat portion 21 of the tubular member 11 and the joint member 1 are formed.
Even if a gap is formed between the inner peripheral surface of 2 and the inner peripheral surface of 2, the leakage of the filler can be suppressed.
【００３８】（７）仕切部２３の連通孔２４の孔径を筒
部材１１の中空部の最大孔径より大きくしたので、筒部
材１１の中空部の断面形状が偏平形状であっても、連通
孔２４が筒部材１１の中空部を塞いでしまうことがない
から、充填材５が筒部材１１の中空部および連通孔２４
を円滑に流れることとなり、補強材１０を確実に施工で
きる。(7) Since the diameter of the communication hole 24 of the partition portion 23 is made larger than the maximum hole diameter of the hollow portion of the tubular member 11, the communication hole 24 is formed even if the hollow portion of the tubular member 11 has a flat cross section. Does not block the hollow portion of the tubular member 11, so that the filler 5 fills the hollow portion of the tubular member 11 and the communication hole 24.
As a result, the reinforcing material 10 can be reliably installed.
【００３９】（８）筒部材１１の断面を２つの平坦部２
１と２つの湾曲部２２とからなる偏平形状とし、この筒
部材１１に鍔部材１４を取り付けたので、鍔部材１４が
充填材流動時の障害物となって充填材５が迂回しようと
するため、土との接触面が窪むことになる。そのため、
充填材５と土との部分の付着性がよくなり、充填材５を
筒部材１１の全長に亘って充填でき、地盤１を確実に補
強できる。また、鍔部材１４が筒部材１１と孔４の壁と
の間のスペーサとなるので、充填材５を筒部材１１の全
周に亘って充填でき、地盤１を確実に補強できる。ま
た、この時、筒部材１１の湾曲部２２に係合される第１
溝部２７と、筒部材１１の平坦部２１に嵌合される第２
溝部２８とを設けたので、鍔部材１４が筒部材１１から
外れることがなく、削孔時の振動に十分耐えることがで
き、補強材１０を確実に施工できる。(8) The cross section of the tubular member 11 has two flat portions 2
Since the flange member 14 is attached to the tubular member 11 because it has a flat shape including one and two curved portions 22, the flange member 14 becomes an obstacle when the filler material flows, and the filler material 5 tries to bypass. , The contact surface with the soil will be depressed. for that reason,
The adhesion between the filler 5 and the soil is improved, the filler 5 can be filled over the entire length of the tubular member 11, and the ground 1 can be reliably reinforced. Further, since the collar member 14 serves as a spacer between the tubular member 11 and the wall of the hole 4, the filling material 5 can be filled over the entire circumference of the tubular member 11 and the ground 1 can be reliably reinforced. Further, at this time, the first portion engaged with the bending portion 22 of the tubular member 11
The groove portion 27 and the second portion fitted into the flat portion 21 of the tubular member 11.
Since the groove portion 28 is provided, the flange member 14 does not come off from the tubular member 11, and it is possible to sufficiently withstand the vibration at the time of drilling, so that the reinforcing material 10 can be reliably installed.
【００４０】（９）鍔部材１４をその第２溝部２８で２
つの鍔部材片１５に分割可能としたので、それぞれの鍔
部材片１５を筒部材１１の湾曲部２２側から差し込んで
連結するだけで容易に鍔部材１４を形成できるから、補
強材１０の施工能率を向上できる。(9) The flange member 14 is attached to the second groove portion 28 to
Since it can be divided into one flange member piece 15, the flange member 14 can be easily formed only by inserting and connecting the respective flange member pieces 15 from the curved portion 22 side of the tubular member 11, so that the construction efficiency of the reinforcing member 10 can be improved. Can be improved.
【００４１】（１０）鍔部材片１５は、１つの第１溝部
２７とこの第１溝部２７を挟む第２溝部２８とを含んで
構成されるから、鍔部材片１５を筒部材１１の湾曲部２
２側から差し込むだけで、その第１溝部２７で湾曲部２
２の雄ねじ形状部分に係合されるとともに、その第２溝
部２８で平坦部２１に嵌合される。つまり、第１溝部２
７で筒部材１１の長さ方向への移動が規制され、第２溝
部２８で鍔部材片１５の回転が規制されることとなり、
確実に筒部材１１に取り付けることができ、補強材１０
を容易かつ確実に施工できる。(10) Since the flange member piece 15 is configured to include one first groove portion 27 and the second groove portion 28 that sandwiches the first groove portion 27, the flange member piece 15 is formed into the curved portion of the tubular member 11. Two
Simply by inserting from the 2 side, the curved portion 2
It is engaged with the male screw-shaped portion 2 and is fitted into the flat portion 21 by the second groove portion 28 thereof. That is, the first groove 2
7, the movement of the tubular member 11 in the length direction is restricted, and the rotation of the flange member piece 15 is restricted by the second groove portion 28.
The reinforcing member 10 can be securely attached to the tubular member 11.
Can be installed easily and reliably.
【００４２】（１１）ビット１３は、互いに交差する第
１直線状部材１３Ａと第２直線状部材１３Ｂとを有する
正面略十字状の保持部材１３Ｄと、この保持部材１３Ｄ
の正面に設けられた削孔用チップ１３Ｅとを備えて構成
されているため、その正面に設けられた削孔用チップ１
３Ｅで削られた土塊は第１直線状部材１３Ａと第２直線
状部材１３Ｂとの間から後方に送られることになり、削
孔を十分に行うことができる。(11) The bit 13 is a holding member 13D having a substantially straight cross shape having a first linear member 13A and a second linear member 13B intersecting each other, and this holding member 13D.
Since it is configured to include the drilling tip 13E provided on the front surface of the drilling tip, the drilling tip 1 provided on the front surface thereof
The earth mass cut by 3E is sent backward from between the first linear member 13A and the second linear member 13B, and the hole can be sufficiently drilled.
【００４３】（１２）第１直線状部材１３Ａと第２直線
状部材１３Ｂとは非直角で交差しているため、削孔用チ
ップ１３Ｅで削られる土塊が大きなものであっても、こ
の大きな土塊は交差角度が直角より大きな交差角度の第
１直線状部材と第２直線状部材との間のスペースから後
方に送られるので、削孔効果をより大きなものにでき
る。(12) Since the first linear member 13A and the second linear member 13B intersect at a non-perpendicular angle, even if the earth mass cut by the drilling tip 13E is large, this large earth mass Is fed rearward from the space between the first linear member and the second linear member having a crossing angle larger than a right angle, so that the drilling effect can be further enhanced.
【００４４】（１３）ビット１３は、その内部に削孔と
同時に充填材を充填するための孔部と、削孔のために空
気を流通させる孔部とを兼用した孔部１３Ｆが形成され
ているため、この孔部１３Ｆが同時注入方式用の孔部と
空気削孔用孔部とを兼用することになり、１つのビット
１３で２種類の用途に利用できる。そのため、ビット１
３の部品点数を減少させることができる。(13) The bit 13 has a hole 13F formed therein, which simultaneously serves as a hole for filling a filler with the hole and a hole for allowing air to flow for the hole. Therefore, the hole 13F serves as both the hole for the simultaneous injection method and the hole for air drilling, and one bit 13 can be used for two kinds of purposes. Therefore, bit 1
The number of parts of 3 can be reduced.
【００４５】なお、本発明は前記実施形態に限定される
ものではなく、本発明の目的を達成できる範囲での変
形、改良等は本発明に含まれるものである。例えば、前
記実施形態では、地盤１の法面２に補強材１０を利用し
たが、これに限らず、既設の擁壁や盛土等に利用しても
よい。The present invention is not limited to the above-described embodiment, but includes modifications and improvements as long as the object of the present invention can be achieved. For example, in the above-described embodiment, the reinforcing material 10 is used for the slope 2 of the ground 1, but the present invention is not limited to this, and it may be used for an existing retaining wall, embankment, or the like.
【００４６】また、本実施形態では、筒部材１１の全長
に亘って地盤１の地中に係止させたが、これに限らず、
充填材５の注入量を適宜調節することによって、例え
ば、筒部材１１の先端部のみ地盤１の地中に係止させて
もよい。Further, in the present embodiment, the tubular member 11 is locked in the ground of the ground 1 over the entire length, but the invention is not limited to this.
By adjusting the injection amount of the filler 5 appropriately, for example, only the tip of the tubular member 11 may be locked in the ground of the ground 1.
【００４７】また、本実施形態では、筒部材１１をその
断面が２つの平坦部２１と２つの湾曲部２２とからなる
偏平形状に形成し、筒部材１１の外周に嵌め込まれる溝
２６を有する鍔部材１４を取り付けたが、これに限ら
ず、図８（Ａ）および（Ｂ）に示すように、筒部材１１
を転造により断面円形状とし、筒部材１１の外周に鍔部
材１６と回転規制部材１８とを取り付けてもよい。な
お、転造前の状態の筒部材１１は、電縫管のほか、シー
ムレスパイプ等でもよい。Further, in this embodiment, the tubular member 11 is formed in a flat shape having a cross section composed of two flat portions 21 and two curved portions 22, and a flange having a groove 26 fitted into the outer periphery of the tubular member 11. Although the member 14 is attached, the present invention is not limited to this, and as shown in FIGS.
Alternatively, the collar member 16 and the rotation restricting member 18 may be attached to the outer circumference of the cylindrical member 11 by rolling the. The tubular member 11 in the state before rolling may be an electric resistance welded pipe, a seamless pipe, or the like.
【００４８】ここで、鍔部材１６は、その溝２６で２つ
の鍔部材片１７に分割可能とされている。回転規制部材
１８は、筒部材１１の外周でかつ鍔部材１６の基端側に
設けられ鍔部材１６の回転を規制するようになってい
る。この回転規制部材１８は鍔部材１６が地表側にずれ
なければよいので、片側のみ配置されれば十分である。
なお、回転規制部材としては、インシュロックの他、テ
ープ、輪止め等でもよい。さらに、回転規制部材１８に
代えて、ＡＢＳ樹脂等を用いた接着剤を利用してもよ
い。この場合、接着剤は鍔部材１６と筒部材１１との間
に塗布する。Here, the flange member 16 can be divided into two flange member pieces 17 by the groove 26 thereof. The rotation restricting member 18 is provided on the outer periphery of the tubular member 11 and on the proximal end side of the flange member 16 so as to restrict the rotation of the flange member 16. The rotation restricting member 18 does not need to be offset from the brim member 16 to the ground surface side, so that it is sufficient to dispose only one side.
The rotation restricting member may be a tape, a wheel stopper, or the like in addition to the insulock. Further, instead of the rotation restricting member 18, an adhesive agent using ABS resin or the like may be used. In this case, the adhesive is applied between the collar member 16 and the tubular member 11.
【００４９】このようにしても、前記実施形態で述べた
（１）〜（７）（１１）〜（１３）の効果に加え、以下
のような効果がある。
（１４）筒部材１１を断面円形状とし、この筒部材１１
に鍔部材１６を取り付けたので、鍔部材１６によって充
填材５が孔４内を流動するのを防止できるから、充填材
５を筒部材１１の全長に亘って充填でき、地盤１を確実
に補強できる。また、鍔部材１６が筒部材１１と孔４の
壁との間のスペーサとなるので、充填材５を筒部材１１
の全周に亘って充填でき、地盤１を確実に補強できる。Even in this case, in addition to the effects (1) to (7) (11) to (13) described in the above embodiment, the following effects are obtained. (14) The tubular member 11 has a circular cross section, and the tubular member 11
Since the collar member 16 is attached to the flange member 16, it is possible to prevent the filler material 5 from flowing in the hole 4 by the collar member 16, so that the filler material 5 can be filled over the entire length of the tubular member 11 and the ground 1 can be reliably reinforced. it can. Further, since the flange member 16 serves as a spacer between the tubular member 11 and the wall of the hole 4, the filler 5 is added to the tubular member 11.
Can be filled over the entire circumference, and the ground 1 can be reliably reinforced.
【００５０】（１５）鍔部材１６の回転を規制する回転
規制部材１８を設けたので、削孔時の振動や充填材５の
流動によって鍔部材１６が回転して筒部材１１の基端側
に移動することがないから、補強材１０を確実に施工で
きる。(15) Since the rotation restricting member 18 for restricting the rotation of the flange member 16 is provided, the flange member 16 rotates due to the vibration at the time of drilling and the flow of the filling material 5 to the base end side of the tubular member 11. Since it does not move, the reinforcing material 10 can be reliably installed.
【００５１】（１６）鍔部材１６をその溝部２６で２つ
の鍔部材片１７に分割可能としたので、それぞれの鍔部
材片１７を筒部材１１の側面から差し込んで連結するだ
けで容易に鍔部材１６を形成できるから、補強材１０の
施工能率を向上できる。(16) Since the flange member 16 can be divided into the two flange member pieces 17 by the groove portion 26 thereof, it is easy to insert the respective flange member pieces 17 from the side surface of the tubular member 11 and connect them. Since 16 can be formed, the construction efficiency of the reinforcing material 10 can be improved.
【００５２】また、前記実施形態では、ビット１３の形
状を第１直線状部材１３Ａと第２直線状部材１３Ｂとが
非直角で交差した形状としたが、本発明では、図９
（Ａ）から図９（Ｃ）に示すように、第１直線状部材１
３Ａと第２直線状部材１３Ｂとを直角で交差した形状と
してもよい。In the above embodiment, the shape of the bit 13 is such that the first linear member 13A and the second linear member 13B intersect at a non-right angle.
As shown in FIGS. 9A to 9C, the first linear member 1
3A and the second linear member 13B may have a shape intersecting at a right angle.
【発明の効果】本発明の補強材によれば、次のような効
果が得られる。補強土工法に用いる筒部材を、焼入れお
よび焼戻しを行った高強度の中空棒鋼としたので、つま
り、焼入れにより硬度や抗張力を増大させ、焼戻しによ
り靱性を向上させたので、筒部材の圧縮力および引張力
に対する構造耐力を向上できる。補強土工法は地中の所
定箇所から筒部材を介して地表面を支持するため、筒部
材の構造耐力を向上させることによって、固い地盤を補
強する場合や、地盤に大きな力が加わった場合でも、地
盤を確実に補強できる。According to the reinforcing material of the present invention, the following effects can be obtained. Since the tubular member used in the reinforced earth method is a high-strength hollow steel bar that has been hardened and tempered, that is, hardness and tensile strength are increased by quenching, and toughness is improved by tempering. The structural proof strength against tensile force can be improved. The reinforced earth method supports the ground surface from a predetermined location in the ground through the tubular member, so by improving the structural strength of the tubular member, it is possible to reinforce a solid ground or even when a large force is applied to the ground. The ground can be reliably reinforced.
【図１】本発明の一実施形態に係る補強材が適用された
法面を示す断面図である。FIG. 1 is a cross-sectional view showing a slope to which a reinforcing material according to an embodiment of the present invention is applied.
【図２】前記実施形態に係る補強材の断面図である。FIG. 2 is a cross-sectional view of a reinforcing material according to the embodiment.
【図３】前記実施形態に係る筒部材の側面図および断面
図である。3A and 3B are a side view and a sectional view of a tubular member according to the embodiment.
【図４】前記実施形態に係る継手部材の断面図および正
面図である。FIG. 4 is a sectional view and a front view of the joint member according to the embodiment.
【図５】前記実施形態に係るビットの側断面図、B-B線
矢視図、C-C線矢視図である。FIG. 5 is a side sectional view, a BB line arrow view, and a CC line arrow view of the bit according to the embodiment.
【図６】前記実施形態に係る鍔部材の断面図および正面
図である。6A and 6B are a sectional view and a front view of a collar member according to the embodiment.
【図７】前記実施形態に係る補強材の施工手順を説明す
るための図である。FIG. 7 is a diagram for explaining a procedure for constructing the reinforcing material according to the embodiment.
【図８】本発明の変形例に係る鍔部材の断面図および正
面図である。FIG. 8 is a sectional view and a front view of a collar member according to a modified example of the present invention.
【図９】本発明の変形例に係るビットの側断面図、B-B
線矢視図、C-C線矢視図である。FIG. 9 is a side sectional view of a bit according to a modified example of the present invention, BB
It is a line arrow view, and a CC line arrow view.
１ 地盤 ２ 法面 ４ 孔 ５ 充填材 １０ 補強材 １１ 筒部材 １２ 継手部材 １３ ビット １３Ａ 第１直線状部材 １３Ｂ 第２直線状部材 １３Ｃ 保持部材 １３Ｅ 削孔用チップ １３Ｆ 孔部 １４，１６ 鍔部材 １５，１７ 鍔部材片 １８ 回転規制部材 ２１ 平坦部 ２２ 湾曲部 ２３ 仕切部 ２４ 連通孔 ２５ テーパ ２６ 溝 ２７ 第１溝部 ２８ 第２溝部 1 ground 2 slopes 4 holes 5 Filling material 10 Reinforcement material 11 Cylindrical member 12 Joint members 13 bits 13A First linear member 13B Second linear member 13C holding member 13E Drilling insert 13F hole 14,16 Tsuba member 15,17 Collar member piece 18 Rotation restriction member 21 Flat part 22 Curved part 23 Partition 24 communication holes 25 taper 26 groove 27 First groove 28 Second groove
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｅ２１Ｄ 20/00 Ｅ２１Ｄ 20/00 Ｖ (72)発明者 田中 典男 神奈川県平塚市田村5893番地 高周波熱錬 株式会社内 (72)発明者 小林 和男 大阪府大阪市西淀川区中島２丁目３番87号 ヒロセ株式会社内 (72)発明者 妻鹿 誠 大阪府大阪市西淀川区中島２丁目３番87号 ヒロセ株式会社内 (72)発明者 大谷 義則 大阪府大阪市西淀川区中島２丁目３番87号 ヒロセ株式会社内 Ｆターム(参考） 2D029 EC02 2D041 GA01 GC02 2D044 EA01 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 7 Identification code FI theme code (reference) E21D 20/00 E21D 20/00 V (72) Inventor Norio Tanaka 5893 Tamura, Hiratsuka-shi, Kanagawa High-frequency heat forged stock In-company (72) Inventor Kazuo Kobayashi 2-33 Nakajima, Nishiyodogawa-ku, Osaka-shi, Osaka Hirose Co., Ltd. (72) Inventor Makoto Tsumaka 2-3-3 Nakajima, Nishiyodogawa-ku, Osaka-shi, Osaka Hirose Co., Ltd. (72) Inventor Yoshinori Otani 2-33 Nakajima, Nishiyodogawa-ku, Osaka-shi, Osaka Hirose Co., Ltd. F-term (reference) 2D029 EC02 2D041 GA01 GC02 2D044 EA01
Claims (12)
ビットとを含んで補強材を構成し、前記ビットを回転さ
せて地表から地中に向かって削孔するとともに、前記筒
部材の中を通して前記ビット近傍から充填材を吐出させ
て孔内に注入し、前記充填材が硬化することにより前記
筒部材の少なくとも先端側を地中に係止させ、かつ前記
筒部材の基端側を地表に係止させて、地盤を補強する補
強土工法において、 前記筒部材は、焼入れおよび焼戻しを行った高強度の中
空棒鋼であることを特徴とする補強土工法。1. A reinforcing member is configured to include a tubular member and a bit provided at a tip of the tubular member, the bit is rotated to drill a hole from the ground surface toward the ground, and The filling material is discharged from the vicinity of the bit through the inside and injected into the hole, and the filling material is cured so that at least the tip end side of the tubular member is locked in the ground, and the base end side of the tubular member is fixed. In the reinforced earthwork method for locking the ground surface to reinforce the ground, the tubular member is a high-strength hollow steel bar that has been quenched and tempered.
る補強材において、 前記筒部材は、その外周面が雄ねじ形状とされているこ
とを特徴とする補強材。2. The reinforcing material used in the reinforcing earthwork method according to claim 1, wherein the outer peripheral surface of the tubular member has a male screw shape.
え、前記筒部材は、前記継手部材の両端側内周に螺合さ
れることを特徴とする補強材。3. The reinforcing member according to claim 2, further comprising a substantially cylindrical joint member that connects the tubular members to each other, and the tubular member is screwed onto inner circumferences of both ends of the joint member. Reinforcement material characterized by.
かって下がるテーパが形成されていることを特徴とする
補強材。4. The reinforcing member according to claim 3, wherein the outer peripheral portion of the joint member is formed with a taper that decreases from substantially the center thereof toward both end sides.
て、 前記継手部材は、その内部空間をそれぞれ一端側の開口
を含む２つの空間に仕切る仕切部を備え、この仕切部に
当接するまで前記筒部材がねじ込まれるとともに、前記
仕切部の略中央には前記筒部材同士を連通する連通孔が
設けられていることを特徴とする補強材。5. The reinforcing member according to claim 3, wherein the joint member includes a partition part that partitions the internal space into two spaces each including an opening on one end side, and until the partition member abuts the partition part. A reinforcing member, wherein the tubular member is screwed in, and a communication hole for communicating the tubular members with each other is provided substantially in the center of the partition portion.
大孔径より大きいことを特徴とする補強材。6. The reinforcing material according to claim 5, wherein the communication hole of the partition portion has a larger hole diameter than the maximum hole diameter of the hollow portion of the tubular member.
材において、 前記筒部材は、熱間圧延により形成され、断面が２つの
平坦部と２つの湾曲部とからなる偏平形状であって、 この筒部材の外周に嵌め込まれる溝を有する鍔部材を備
え、この溝は、前記湾曲部に係合される第１溝部と、前
記平坦部に嵌合される第２溝部とを備えていることを特
徴とする補強材。7. The reinforcing member according to claim 2, wherein the tubular member is formed by hot rolling, and has a flat cross section with two flat portions and two curved portions. And a flange member having a groove fitted to the outer periphery of the tubular member, the groove including a first groove portion engaged with the curved portion and a second groove portion fitted with the flat portion. Reinforcement material characterized by being
割可能とされていることを特徴とする補強材。8. The reinforcing material according to claim 7, wherein the collar member is dividable into two collar member pieces at a second groove portion of the groove.
材において、 前記筒部材は、転造により形成された断面円形状であっ
て、 この筒部材の外周に嵌め込まれる溝を有する鍔部材と、
前記筒部材の外周でかつ前記鍔部材の基端側に設けられ
前記鍔部材の回転を規制する回転規制部材とを備えてい
ることを特徴とする補強材。9. The reinforcing material according to claim 2, wherein the tubular member has a circular cross-section formed by rolling, and has a groove that is fitted into the outer periphery of the tubular member. Members,
A reinforcing member, which is provided on the outer periphery of the tubular member and on the base end side of the flange member, and a rotation restricting member that restricts rotation of the flange member.
れていることを特徴とする補強材。10. The reinforcing material according to claim 9, wherein the flange member is separable into two flange member pieces by the groove.
補強材において、 前記ビットは、互いに交差する第１直線状部材と第２直
線状部材とを有する保持部材と、この保持部材の正面に
設けられた削孔用チップとを備え、前記第１直線状部材
と前記第２直線状部材とは非直角で交差していることを
特徴とする補強材。11. The reinforcing member according to claim 1, wherein the bit has a holding member having a first linear member and a second linear member that intersect each other, and a front surface of the holding member. And a second linear member intersecting the first linear member at a non-right angle.
補強材において、 前記ビットは、その内部に削孔と同時に充填材を充填す
るための孔部と、削孔のために空気を流通させる孔部と
を兼用した孔部を備えたことを特徴とする補強材。12. The reinforcing material according to claim 1, wherein the bit has a hole portion for filling a filling material at the same time as the drilling, and air for circulating the drilling hole. A reinforcing material having a hole which also serves as a hole to be made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001218278A JP3671162B2 (en) | 2001-07-18 | 2001-07-18 | Reinforcement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001218278A JP3671162B2 (en) | 2001-07-18 | 2001-07-18 | Reinforcement |
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| Publication Number | Publication Date |
|---|---|
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| JP3671162B2 JP3671162B2 (en) | 2005-07-13 |
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ID=19052477
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|---|---|---|---|
| JP2001218278A Expired - Fee Related JP3671162B2 (en) | 2001-07-18 | 2001-07-18 | Reinforcement |
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| Country | Link |
|---|---|
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006037625A (en) * | 2004-07-29 | 2006-02-09 | High Frequency Heattreat Co Ltd | Reinforcing material |
| JP2009197472A (en) * | 2008-02-21 | 2009-09-03 | Nippon Steel Corp | Steel pipe pile and foundation structure |
| JP2013023873A (en) * | 2011-07-20 | 2013-02-04 | Raiteku:Kk | Installation method for anchor device |
| JP2015183364A (en) * | 2014-03-20 | 2015-10-22 | 公益財団法人鉄道総合技術研究所 | Method for preventing soil structure from sliding at slope surface layer with geocell fixing operation auxiliary means |
| JP2019019505A (en) * | 2017-07-13 | 2019-02-07 | 積水化学工業株式会社 | Tunnel rehabilitation method and rock bolt |
-
2001
- 2001-07-18 JP JP2001218278A patent/JP3671162B2/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006037625A (en) * | 2004-07-29 | 2006-02-09 | High Frequency Heattreat Co Ltd | Reinforcing material |
| JP4494115B2 (en) * | 2004-07-29 | 2010-06-30 | 高周波熱錬株式会社 | Reinforcement |
| JP2009197472A (en) * | 2008-02-21 | 2009-09-03 | Nippon Steel Corp | Steel pipe pile and foundation structure |
| JP2013023873A (en) * | 2011-07-20 | 2013-02-04 | Raiteku:Kk | Installation method for anchor device |
| JP2015183364A (en) * | 2014-03-20 | 2015-10-22 | 公益財団法人鉄道総合技術研究所 | Method for preventing soil structure from sliding at slope surface layer with geocell fixing operation auxiliary means |
| JP2019019505A (en) * | 2017-07-13 | 2019-02-07 | 積水化学工業株式会社 | Tunnel rehabilitation method and rock bolt |
| JP7010610B2 (en) | 2017-07-13 | 2022-01-26 | 積水化学工業株式会社 | Tunnel rehabilitation method and lock bolt |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3671162B2 (en) | 2005-07-13 |
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