JP5471381B2 - Filling reinforcement method - Google Patents

Filling reinforcement method Download PDF

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JP5471381B2
JP5471381B2 JP2009277913A JP2009277913A JP5471381B2 JP 5471381 B2 JP5471381 B2 JP 5471381B2 JP 2009277913 A JP2009277913 A JP 2009277913A JP 2009277913 A JP2009277913 A JP 2009277913A JP 5471381 B2 JP5471381 B2 JP 5471381B2
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pile
embankment
reinforcing
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bag body
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JP2011117249A (en
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山本  彰
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Obayashi Corp
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Description

本発明は、盛土の補強工法に関し、特に、小口径杭(口径300mm以下の杭)を用いた盛土の補強工法に関する。   The present invention relates to an embankment reinforcement method, and more particularly, to an embankment reinforcement method using a small-diameter pile (a pile having a diameter of 300 mm or less).

従来、道路や鉄道等を通すために、基礎地盤の上部に土砂を盛り上げて周囲よりも高い盛土(築堤等)造成する工事が行われ、このような工事によって造成された盛土を補強する方法として、例えば、特許文献1に記載のような方法が提案されている。   Conventionally, in order to pass roads and railroads, etc., construction has been performed to build up earth (embankment etc.) higher than the surrounding by raising earth and sand on the upper part of the foundation ground, and as a method to reinforce the embankment created by such construction For example, a method as described in Patent Document 1 has been proposed.

特許文献1に記載の補強方法は、堤防等の盛土の法面及び犬走から口径が20〜30cmのケーシングパイプを先端が基礎地盤に達するように圧入し、ケーシングパイプ内に鉄筋を補強材として挿入し、ケーシングパイプ内に先端からコンクリートを打設しながらケーシングパイプを引き抜くことにより、盛土から基礎地盤に至る補強杭を構築し、このような補強杭を鉛直方向及び斜め方向を向くように複数構築し、法面から突出させた各補強杭の頭部間にコンクリートを打設し、この板状のコンクリートで複数の補強杭の頭部間を連結し、このような補強杭群を盛土の両法面に、長手方向に適当な間隔ごとに複数箇所に設けることにより盛土を補強し、盛土の安定化を図るように構成したものである。   The reinforcing method described in Patent Document 1 is a method in which a casing pipe having a diameter of 20 to 30 cm is press-fitted from the slope of a bank such as a bank and a dog run so that the tip reaches the foundation ground, and a reinforcing bar is used as a reinforcing material in the casing pipe. By inserting and pulling out the casing pipe while placing concrete in the casing pipe, a reinforcing pile from the embankment to the foundation ground is constructed, and a plurality of such reinforcing piles are oriented vertically and diagonally. Build and place concrete between the heads of each reinforcing pile protruding from the slope, connect the heads of multiple reinforcing piles with this plate-like concrete, On both slopes, the embankment is reinforced by providing it at a plurality of locations at appropriate intervals in the longitudinal direction, thereby stabilizing the embankment.

特開昭63−110319号公報Japanese Unexamined Patent Publication No. Sho 63-110319

ところで、上記のような盛土の補強方法にあっては、複数の補強杭群によって盛土の沈下やすべりに抵抗することができるので、新設、既設を問わず、堤防、護岸、路床等の盛土を補強し、盛土の安定化を図ることはできる。   By the way, in the embankment reinforcement method as described above, it is possible to resist the settlement and slippage of the embankment by a plurality of reinforcing pile groups, so that embankments such as embankments, revetments, roadbeds, etc. It is possible to reinforce the embankment and stabilize the embankment.

しかし、上記のような盛土の補強方法にあっては、頭部が連結された補強杭群により、盛土に作用する鉛直荷重(地震に伴う鉛直方向の慣性力等)に対しては十分に抵抗することができるが、補強杭群が個別に設けられているため、盛土全体を補強することができず、特に、水平荷重(地震に伴う水平方向の慣性力等)に対しては十分に抵抗することができないため、盛土を初期の形状に保つことが困難になり、盛土に滑り、沈下等が生じるおそれがある。   However, in the embankment reinforcement method as described above, the reinforcement piles with the heads connected to each other are sufficiently resistant to vertical loads acting on the embankment (vertical inertial force associated with earthquakes, etc.). However, since the reinforcement pile group is provided individually, the whole embankment cannot be reinforced, and is particularly resistant to horizontal loads (such as horizontal inertial force due to earthquakes). Therefore, it is difficult to keep the embankment in the initial shape, and there is a risk that the embankment may slip, sink, or the like.

本発明は、上記のような従来の問題に鑑みなされたものであって、鉛直荷重と水平荷重の両方に十分に抵抗することができる盛土の補強工法を提供することを目的とする。   This invention is made | formed in view of the above conventional problems, Comprising: It aims at providing the reinforcement construction method of the embankment which can fully resist both a vertical load and a horizontal load.

上記のような課題を解決するために、本発明は、以下のような手段を採用している。
すなわち、本発明は、基礎地盤の上部に造成された盛土を引張荷重及び圧縮荷重に抵抗可能な強度を有する杭により補強する盛土の補強工法であって、前記盛土に、前記杭を略鉛直方向に打設するとともに、その近傍に、前記杭を斜め方向に打設し、前記略鉛直方向の杭の頭部と前記斜め方向の杭の頭部とを結合して補強杭群を構成し、この補強杭群を前記盛土の両側面の少なくとも1箇所に設け、前記両側面の対向する両補強杭群に対応するように、前記盛土に、前記杭を略水平方向に打設し、該略水平方向の杭の両端部と前記両補強杭群の前記略鉛直方向の杭の頭部と前記斜め方向の杭の頭部とを結合し、前記斜め方向の杭は、当該斜め方向の杭を含む前記補強杭群と対向して前記盛土の反対側の側面に設けられた前記補強杭群の何れの杭とも接続されていないことを特徴とする。
In order to solve the above problems, the present invention employs the following means.
That is, the present invention is a reinforcement method for embankment in which the embankment formed on the upper part of the foundation ground is reinforced by a pile having a strength capable of resisting tensile load and compressive load, and the pile is placed on the embankment in a substantially vertical direction. In the vicinity thereof, the pile is driven in an oblique direction, and the pile head in the substantially vertical direction and the head of the pile in the oblique direction are combined to form a reinforcing pile group, The reinforcing pile group is provided in at least one place on both side surfaces of the embankment, and the pile is driven in a substantially horizontal direction on the embankment so as to correspond to both reinforcing pile groups facing each other on the both sides. Combining both ends of the pile in the horizontal direction and the heads of the substantially vertical piles and the heads of the diagonal piles of the two reinforcing pile groups, the piles in the diagonal direction are connected to the piles in the diagonal direction. Any of the reinforcing pile groups provided on the opposite side surface of the embankment facing the reinforcing pile group including Both wherein the unconnected.

本発明の盛土の補強工法によれば、鉛直荷重(例えば、自動車による活荷重、地震に伴う鉛直方向の慣性力)に対しては、盛土に鉛直下向きの荷重が作用すると、略鉛直方向の杭及び各斜め方向の杭に圧縮抵抗力が発生し、盛土内部に大きな圧縮力が作用するのを防止できる。また、盛土に鉛直上向きの荷重(地震の鉛直動のうち、上向きの慣性力が作用する場合)が作用すると、略鉛直方向の杭及び各斜め方向の杭には引張抵抗力が発生し、盛土内部に大きな引張力が作用するのを防止できる。さらに、盛土内部に鉛直上向きと下向きの歪が大きく作用する(両振幅)と、盛土内部の沈下を助長する可能性が高くなるが、略鉛直方向の杭及び各斜め方向の杭によってこれを抑制することができる。   According to the embankment reinforcement method of the present invention, when a vertical downward load acts on the embankment for a vertical load (for example, a live load by an automobile, a vertical inertia force due to an earthquake), the pile in a substantially vertical direction And compression resistance force generate | occur | produces in the pile of each diagonal direction, and it can prevent that a big compression force acts on the inside of embankment. In addition, when a vertical upward load (when an upward inertial force is applied to the vertical movement of the earthquake) acts on the embankment, tensile resistance is generated in the piles in the substantially vertical direction and in each oblique direction. A large tensile force can be prevented from acting inside. Furthermore, if vertical upward and downward strains are greatly applied to the inside of the embankment (both amplitudes), the possibility of promoting settlement within the embankment increases, but this is suppressed by a substantially vertical pile and diagonal piles. can do.

さらに、盛土の両側面の結合部(支点部)に、各補強杭群の略鉛直方向の杭の頭部、各斜め方向の杭の頭部、及び水平方向の杭の端部を集中させているので、各補強杭群の略鉛直方向の杭、各斜め方向の杭に作用する力を各結合部(支点部)に集中させることができるとともに、水平方向の杭を通じて対向する反対側の各補強杭群の結合部(支点部)にその力を伝達させ、その力を反対側の各補強杭群の略鉛直方向の杭及び各斜め方向の杭に分散させることができ、複数の補強杭群により、盛土の全体の安定性を確保することができる。   Furthermore, the heads of the piles in the vertical direction, the heads of the piles in the diagonal direction, and the ends of the piles in the horizontal direction are concentrated on the joints (fulcrum parts) on both sides of the embankment. Therefore, it is possible to concentrate the forces acting on the piles in the substantially vertical direction and the diagonal piles of each reinforcing pile group on each connecting portion (fulcrum), and on the opposite side through the horizontal piles. The force can be transmitted to the connecting part (fulcrum part) of the reinforcing pile group, and the force can be distributed to the substantially vertical pile and the oblique pile of each reinforcing pile group on the opposite side. The group can ensure the overall stability of the embankment.

さらに、本発明において、前記各杭の周囲に隙間を設け、該隙間内にグラウト材を充填することとしてもよい。   Furthermore, in this invention, it is good also as providing a clearance gap around each said pile and filling grout material in this clearance gap.

本発明の盛土の補強工法によれば、各杭の周囲をグラウト材で覆うことができるので、各杭に錆が発生するのを防止できる。   According to the embankment reinforcement method of the present invention, since the periphery of each pile can be covered with a grout material, it is possible to prevent rust from being generated on each pile.

さらに、本発明において、前記各杭の先端を斜めに切断してこの先端面単一の板材を取り付け、該板材の一部を前記各杭の外面から突出させ、前記各杭と前記板材とを一体に回転させることにより、前記各杭の周囲に前記隙間を設けることとしてもよい。 Furthermore, in the present invention, the tip of each pile is cut obliquely, a single plate is attached to the tip, and a part of the plate is projected from the outer surface of each pile, and each pile and plate It is good also as providing the said clearance gap around each said pile by rotating this.

本発明の盛土の補強工法によれば、各杭の周囲に容易に隙間を設けることができる。   According to the embankment reinforcement method of the present invention, a gap can be easily provided around each pile.

さらに、本発明において、前記各杭の先端に前記各杭よりも大径の先端ビットを設け、前記先端ビットを回転させることにより、前記各杭の周囲に前記隙間を設けることとしてもよい。   Furthermore, in this invention, it is good also as providing the said clearance gap around each said pile by providing the tip bit larger diameter than each said pile at the front-end | tip of each said pile, and rotating the said tip bit.

本発明の盛土の補強工法によれば、各杭の周囲に容易に隙間を設けることができる。   According to the embankment reinforcement method of the present invention, a gap can be easily provided around each pile.

さらに、本発明において、前記各杭の地下水が作用する部位に、前記各杭の周囲を覆う袋体を設け、該袋体の内部にグラウト材を充填することとしてもよい。 Furthermore, in this invention, it is good also as providing the bag body which covers the circumference | surroundings of each said pile in the site | part which the ground water of each said pile acts, and filling grout material inside this bag body.

本発明の盛土の補強工法によれば、各杭の地下水が作用する部位の周囲は、内部にグラウト材を充填した袋体で覆われることになるので、各杭に錆が発生するのを防止できる。 According to the embankment reinforcement method of the present invention, the periphery of the site where the groundwater acts on each pile is covered with a bag body filled with grout material inside, so that the occurrence of rust on each pile is prevented. it can.

さらに、本発明は、基礎地盤の上部に造成された盛土に、引張荷重及び圧縮荷重に抵抗可能な強度を有する杭を略鉛直方向に打設するとともに、その近傍に、前記杭を斜め方向に打設し、前記略鉛直方向の杭の頭部と前記斜め方向の杭の頭部とを結合して補強杭群を構成し、この補強杭群を前記盛土の両側面の少なくとも1箇所に設け、前記両側面の対向する両補強杭群に対応するように、前記盛土に、前記杭を略水平方向に打設し、該略水平方向の杭の両端部と前記両補強杭群の前記略鉛直方向の杭の頭部と前記斜め方向の杭の頭部とを結合して前記盛土を補強する盛土の補強工法であって、前記各杭の複数箇所に内外を貫通する孔を設けるとともに、前記各杭の内部に袋体を設け、該袋体の内部にグラウト材を充填して膨出変形させることにより、前記袋体の一部を前記孔から前記各杭の外面側に突出させ、又は前記各杭の内部の前記各孔に対応する部分にそれぞれシート部材を設け、前記各杭の内部にグラウト材を充填することにより、前記各シート部材を膨出変形させて前記各シート部材の一部を前記各孔から前記各杭の外面側に突出させることを特徴とす前記各杭の複数箇所に内外を貫通する孔を設けるとともに、前記各杭の内部に袋体を設け、該袋体の内部にグラウト材を充填して膨出変形させることにより、前記袋体の一部を前記孔から前記各杭の外面側に突出させ、又は前記各杭の内部の前記各孔に対応する部分にそれぞれシート部材を設け、前記各杭の内部にグラウト材を充填することにより、前記各シート部材を膨出変形させて前記各シート部材の一部を前記各孔から前記各杭の外面側に突出させることを特徴とするFurthermore, the present invention provides a pile having a strength capable of resisting a tensile load and a compressive load in a substantially vertical direction on the embankment formed on the upper part of the foundation ground, and in the vicinity thereof, the pile is disposed in an oblique direction. The pile head is placed and the pile heads in the substantially vertical direction and the pile heads in the oblique direction are combined to form a pile group, and the pile group is provided in at least one place on both sides of the embankment. The piles are driven into the embankment in a substantially horizontal direction so as to correspond to both the reinforcing pile groups facing each other on both sides, and the both ends of the substantially horizontal piles and the abbreviations of the two reinforcing pile groups are provided. It is a reinforcement method for embankment that reinforces the embankment by combining the head of the pile in the vertical direction and the head of the pile in the oblique direction, and providing holes penetrating inside and outside in a plurality of locations of each pile, A bag body is provided inside each of the piles, and the bag body is filled with a grout material to be bulged and deformed. Accordingly, a part of the bag body is protruded from the hole to the outer surface side of each pile, or a sheet member is provided in a portion corresponding to each hole inside each pile, and a grout is provided inside each pile. by filling the timber, a plurality of locations of the each pile you characterized in that protrudes above a portion of the respective sheet members each sheet member is bulged deformed from the respective holes on the outer surface of each of said pile A hole penetrating the inside and outside of the pile, a bag body is provided inside each of the piles, and the bag body is filled with a grout material so as to bulge and deform, whereby a part of the bag body is removed from the hole. Each sheet member is projected by projecting to the outer surface side of each pile, or by providing a sheet member at a portion corresponding to each hole inside each pile, and filling a grout material inside each pile. A part of each sheet member is swelled and deformed Wherein the protruded on the outer surface side of the pile from the holes.

本発明の盛土の補強工法によれば、各杭の各孔から各杭の外面側に突出させた袋体の一部又はシート部材の一部により、各杭の周囲に隙間を確保することができる。   According to the embankment reinforcement method of the present invention, it is possible to secure a gap around each pile by a part of the bag body or a part of the sheet member that protrudes from each hole of each pile to the outer surface side of each pile. it can.

以上、説明したように、本発明の盛土の補強工法によれば、あらゆる方向の荷重に抵抗することができるので、盛土の沈下、すべり、水平方向の変形を防止でき、盛土を初期の形状に保ち続けることができ、長期的に盛土の安定性を確保することができる。   As described above, according to the embankment reinforcement method of the present invention, it is possible to resist loads in all directions, so that settlement, slipping and horizontal deformation of the embankment can be prevented, and the embankment is brought into an initial shape. It can be maintained and the stability of the embankment can be secured in the long term.

本発明による盛土の補強工法の一実施の形態を示した概略図である。It is the schematic which showed one Embodiment of the embankment reinforcement method by this invention. 鉛直方向の小口径杭、斜め方向の小口径杭、及び水平方向の小口径杭の打設方法の一例を示した断面図である。It is sectional drawing which showed an example of the placement method of the small diameter pile of a perpendicular direction, the small diameter pile of an oblique direction, and the small diameter pile of a horizontal direction. 鉛直方向の小口径杭、斜め方向の小口径杭、及び水平方向の小口径杭の打設方法の他の例を示した断面図である。It is sectional drawing which showed the other example of the placement method of the small diameter pile of a perpendicular direction, the small diameter pile of an oblique direction, and the small diameter pile of a horizontal direction. 鉛直方向の小口径杭、斜め方向の小口径杭、及び水平方向の小口径杭の外面側の袋体と隙間との関係を示した断面図である。It is sectional drawing which showed the relationship between the bag body and clearance gap of the outer surface side of the small diameter pile of a perpendicular direction, the small diameter pile of an oblique direction, and the small diameter pile of a horizontal direction. 鉛直方向の小口径杭、斜め方向の小口径杭、及び水平方向の小口径杭の打設方法の内面側の袋体と隙間との関係を示した概略図である。It is the schematic which showed the relationship between the bag body and the clearance gap on the inner surface side of the placement method of the small diameter pile of a perpendicular direction, the small diameter pile of an oblique direction, and the small diameter pile of a horizontal direction. 図5の断面図である。It is sectional drawing of FIG. 連結具の斜視図である。It is a perspective view of a coupling tool. 補強杭群の配置の一例を示した概略図である。It is the schematic which showed an example of arrangement | positioning of a reinforcement pile group. 補強杭群の配置の他の例を示した概略図である。It is the schematic which showed the other example of arrangement | positioning of a reinforcement pile group. 本発明による盛土の補強工法による力の伝達メカニズム(水平荷重)を示した説明図である。It is explanatory drawing which showed the transmission mechanism (horizontal load) of the force by the reinforcement method of embankment by this invention. 本発明による盛土の補強工法による力の伝達メカニズム(鉛直荷重)を示した説明図である。It is explanatory drawing which showed the transmission mechanism (vertical load) of the force by the reinforcement method of embankment by this invention.

以下、図面を参照しながら本発明の実施の形態について説明する。
図1〜図3には、本発明による盛土の補強工法の一実施の形態が示されている。この盛土の補強工法は、小口径杭(口径300mm以下の杭)を用いた補強工法であって、道路や鉄道等を通すために造成された築堤等の盛土を補強し、盛土の安定化を図るのに有効なものである。
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 3 show an embodiment of an embankment reinforcement method according to the present invention. This embankment reinforcement method is a reinforcement method using small-diameter piles (pile with a diameter of 300 mm or less), reinforcing embankments such as embankments built to pass roads and railways, etc., and stabilizing the embankment. It is effective to plan.

すなわち、本実施の形態の盛土の補強工法は、図1に示すように、基礎地盤4の上部に土砂等を盛り上げて造成した断面台形状の盛土1に対して、複数本の小口径杭7、20、25を複数方向から打設し、これらの複数本の小口径杭7、20、25によって盛土1を補強することにより、盛土1の安定化を図るものである。   That is, the embankment reinforcement method of the present embodiment, as shown in FIG. 1, includes a plurality of small-diameter piles 7 for a trapezoidal embankment 1 formed by raising earth and sand on the upper part of the foundation ground 4. , 20, 25 are driven from a plurality of directions, and the embankment 1 is reinforced by the plurality of small-diameter piles 7, 20, 25 to stabilize the embankment 1.

小口径杭7、20、25は、引張荷重及び圧縮荷重に抵抗可能な強度を有する材料、具体的には、水平荷重(例えば、地震に伴う水平方向の慣性力等)、及び鉛直荷重(例えば、自動車による活荷重や地震に伴う鉛直方向の慣性力等)に対して抵抗可能な強度を有し、かつ所定の曲げ剛性を有する材料からなる杭部材8、21、26と、杭部材8、21、26の内面8c、21c、26c側及び外面8b、21b、26b側に設けられるグラウト材15とから構成され、杭部材8、21、26は、例えば、丸形鋼管、角形鋼管、H形鋼等(本実施の形態では丸形鋼管)から構成されている。   The small-diameter piles 7, 20, 25 are made of a material having strength capable of resisting tensile load and compressive load, specifically, horizontal load (for example, horizontal inertia force due to an earthquake, etc.) and vertical load (for example, , Pile members 8, 21, 26 made of a material having a strength capable of resisting a vertical load due to a live load or an earthquake caused by an automobile and the like, and a pile member 8, The grout material 15 is provided on the inner surface 8c, 21c, 26c side and the outer surface 8b, 21b, 26b side of the 21, 26, and the pile members 8, 21, 26 are, for example, round steel pipe, square steel pipe, H-shape It is comprised from steel etc. (this embodiment round steel pipe).

上記のような構成の小口径杭7、20、25を用いて盛土1を補強するには、後述する連結具30をガイドとして用い、この連結具30を盛土1の一方の側面3aの所定の位置に配置し、この連結具30を利用して略鉛直方向に杭部材8を打設し、斜め方向に杭部材21を打設し、略水平方向に杭部材26を打設する。   In order to reinforce the embankment 1 using the small-diameter piles 7, 20, 25 having the above-described configuration, a connecting tool 30 described later is used as a guide, and the connecting tool 30 is used as a predetermined side surface 3 a of the embankment 1. The pile member 8 is driven in a substantially vertical direction by using the connecting tool 30, the pile member 21 is driven in an oblique direction, and the pile member 26 is driven in a substantially horizontal direction.

連結具30は、例えば、図7に示すように、軸線が略鉛直方向を向くように設けられる筒状の第1取付部31と、軸線が斜め方向を向くように設けられる傾斜角度の異なる複数の筒状の第2取付部32と、軸線が略水平方向を向くように設けられる筒状の第3取付部33と、第1取付部31と第2取付部32との間、隣接する第2取付部32間、及び第2取付部32と第3取付部33との間を溶接等によって一体に連結する板状の連結板34とから構成されている。   For example, as shown in FIG. 7, the connector 30 includes a cylindrical first mounting portion 31 provided such that the axis is directed in a substantially vertical direction, and a plurality of different inclination angles provided so that the axis is directed in an oblique direction. The cylindrical second mounting portion 32, the cylindrical third mounting portion 33 provided so that the axis is substantially horizontal, and the first mounting portion 31 and the second mounting portion 32 adjacent to each other. It is comprised from the plate-shaped connection board 34 which connects between the 2 attachment parts 32 and between the 2nd attachment part 32 and the 3rd attachment parts 33 by welding etc. integrally.

上記の連結具30を、第1取付部31が略鉛直方向を向き、第2取付部32が斜め方向を向き、第3取付部33が略水平方向を向くように、盛土1の一方の側面3aの所定の位置に配置し、第1取付部31をガイドとして杭部材8を打設し、各第2取付部32をガイドとして杭部材21を打設し、第3取付部33をガイドとして杭部材26を打設することにより、盛土1の一方の側面3aから略鉛直方向に杭部材8を打設し、斜め方向に複数本の杭部材21を打設し、略水平方向に杭部材27を打設することができる。   One side surface of the embankment 1 is configured so that the first attachment portion 31 faces in a substantially vertical direction, the second attachment portion 32 faces in an oblique direction, and the third attachment portion 33 faces in a substantially horizontal direction. The pile member 8 is placed using the first attachment portion 31 as a guide, the pile member 21 is placed using each second attachment portion 32 as a guide, and the third attachment portion 33 is used as a guide. By driving the pile member 26, the pile member 8 is driven in a substantially vertical direction from one side surface 3a of the embankment 1, a plurality of pile members 21 are driven in an oblique direction, and the pile member is set in a substantially horizontal direction. 27 can be placed.

杭部材8、各杭部材21、及び杭部材26を打設した後に、溶接等により、杭部材8の頭部9を第1取付部31に一体に連結し、杭部材21の頭部22を第2取付部32に一体に連結し、杭部材26の端部26aを第3取付部33に一体に連結し、杭部材8の頭部8と各杭部材21の頭部22と杭部材26の端部26aとを連結具30を介して剛結合する。   After placing the pile member 8, each pile member 21, and the pile member 26, the head 9 of the pile member 8 is integrally connected to the first mounting portion 31 by welding or the like, and the head 22 of the pile member 21 is It connects with the 2nd attaching part 32 integrally, the end part 26a of the pile member 26 is connected with the 3rd attaching part 33 integrally, the head 8 of the pile member 8, the head 22 of each pile member 21, and the pile member 26 The end portion 26a of the first and second end portions 26a are rigidly connected to each other through the connector 30.

なお、上記の連結作業は、後述するように、杭部材8、21、26の外面8b、21b、26b側に形成される隙間14内、及び杭部材8、21、26の内面8c、21c、26c側にグラウト材15を充填して固化させ、杭部材8、21、26を地山(盛土1、基礎地盤4、及び支持層5)と一体化した後に行うように構成してもよい。   In addition, said connection operation | work is the inside of the clearance gap 14 formed in the outer surface 8b, 21b, 26b side of the pile member 8, 21, 26, and the inner surface 8c, 21c of the pile member 8, 21, 26 so that it may mention later. The grout material 15 may be filled and solidified on the 26c side, and the pile members 8, 21, and 26 may be integrated with the natural ground (the embankment 1, the foundation ground 4, and the support layer 5).

なお、連結具30は、上記の構成のものに限らず、杭部材8の頭部9と各杭部材21の頭部22と杭部材26の端部26aとを剛結合できる構成のものであればよい。また、連結具30を用いずに、杭部材8の頭部9と各杭部材21の頭部22と杭部材26の端部26aとを溶接等によって直接に剛結合するように構成してもよい。   The connector 30 is not limited to the one having the above-described configuration, and may have a configuration in which the head 9 of the pile member 8, the head 22 of each pile member 21, and the end 26 a of the pile member 26 can be rigidly coupled. That's fine. Further, the head 9 of the pile member 8, the head 22 of each pile member 21, and the end portion 26a of the pile member 26 may be directly rigidly coupled by welding or the like without using the connector 30. Good.

杭部材8は、例えば、図2及び図3に示すような方法によって盛土1に打設することができる。図2に示す方法は、杭部材8の先端8aを斜めに切断し、この斜めに切断した杭部材8の先端8aに略楕円形状の板材12を取り付け、この板材12の一部を杭部材8の外面8bから外方に延出させ、杭部材8と板材12とを一体に回転させながら圧入することにより、杭部材8の先端8aを盛土1、基礎地盤4を貫通させて支持層5に貫入させる方法である。   The pile member 8 can be placed on the embankment 1 by a method as shown in FIGS. 2 and 3, for example. The method shown in FIG. 2 cuts the front-end | tip 8a of the pile member 8 diagonally, attaches the substantially elliptical board | plate material 12 to the front-end | tip 8a of this pile member 8 cut | disconnected diagonally, A part of this board | plate material 12 is pile member 8 The pile member 8 and the plate member 12 are pressed together while being integrally rotated, so that the tip 8a of the pile member 8 penetrates the embankment 1 and the foundation ground 4 to the support layer 5. It is a method to penetrate.

また、図3に示す方法は、杭部材8の先端8aに杭部材8よりも大径の先端ビット13を設け、このような構成の杭部材8と先端ビット13とを一体に回転させながら圧入することにより、杭部材8の先端8aを盛土1、基礎地盤4を貫通させて支持層5に貫入させる方法である。   In the method shown in FIG. 3, a tip bit 13 having a diameter larger than that of the pile member 8 is provided at the tip 8a of the pile member 8, and the pile member 8 and the tip bit 13 having such a configuration are press-fitted while rotating integrally. By doing this, the tip 8 a of the pile member 8 is made to penetrate the embankment 1 and the foundation ground 4 and penetrate into the support layer 5.

図2及び図3に示すような方法によって杭部材8を地山(盛土1、基礎地盤4、及び支持層5)に貫入させることにより、地山に、杭部材8よりも大径の孔を削孔できるとともに、削孔によって生じた土砂を孔外に容易に排出することができ、杭部材8の外面8bと地山との間に所定の筒状の隙間14を形成することができる。   By making the pile member 8 penetrate into the natural ground (the embankment 1, the foundation ground 4, and the support layer 5) by a method as shown in FIGS. 2 and 3, a hole having a diameter larger than that of the pile member 8 is formed in the natural ground. In addition to drilling, the earth and sand generated by the drilling can be easily discharged out of the hole, and a predetermined cylindrical gap 14 can be formed between the outer surface 8b of the pile member 8 and the natural ground.

そして、上記のように形成した隙間14内、及び杭部材8の内面8c側にセメントミルク等のグラウト材15を充填して固化させることにより、杭部材8と地山(盛土1、基礎地盤4、及び支持層5)とを一体化した略鉛直方向の小口径杭7を構築することができる。   Then, the grout material 15 such as cement milk is filled and solidified in the gap 14 formed as described above and the inner surface 8c side of the pile member 8 to solidify the pile member 8 and the ground (fill 1 and foundation ground 4). And a small-diameter pile 7 in a substantially vertical direction integrated with the support layer 5).

なお、図4に示すように、予め、杭部材8の外面8bの1箇所又は複数箇所に、杭部材8の全周を覆う筒状の袋体16を取り付け、袋体16に注入管(図示せず)を挿入しておき、杭部材8を地山に貫入させた後に、袋体16の内部に注入管を介してセメントミルク等のグラウト材15を充填して膨出変形させ、袋体16によって杭部材8の外面8bを被覆するように構成してもよい。このような袋体16を杭部材8に取り付けておくことにより、杭部材8の外面8b側に所定の隙間14を確保することができるとともに、袋体16で杭部材8の外面8bを被覆することができるので、地下水等が作用する部分に袋体16を設けておくことにより、杭部材8に錆びが発生するのを防止できる。なお、注入管は、袋体16へのグラウト材の注入後に撤去してもよいし、残置させてもよい。   In addition, as shown in FIG. 4, the cylindrical bag body 16 which covers the perimeter of the pile member 8 is previously attached to one place or multiple places of the outer surface 8b of the pile member 8, and an injection pipe (FIG. After inserting the pile member 8 into the ground, the bag body 16 is filled with a grout material 15 such as cement milk through an injection tube and swelled and deformed. The outer surface 8 b of the pile member 8 may be covered with 16. By attaching such a bag body 16 to the pile member 8, a predetermined gap 14 can be secured on the outer surface 8 b side of the pile member 8 and the outer surface 8 b of the pile member 8 is covered with the bag body 16. Therefore, it is possible to prevent the pile member 8 from being rusted by providing the bag body 16 in the portion where the groundwater or the like acts. The injection tube may be removed after the grout material is injected into the bag 16 or may be left behind.

なお、袋体16の両端の杭部材8の部分に環状の突起10を一体に設けておき、袋体16の外面が突起10よりも外方に食み出ないように構成しておくことにより、杭部材8を地山に貫入させる際に、袋体16が地山と接触して損傷等するのを防止できる。   In addition, the annular protrusion 10 is integrally provided in the portion of the pile member 8 at both ends of the bag body 16 so that the outer surface of the bag body 16 does not protrude outward from the protrusion 10. When the pile member 8 is penetrated into the natural ground, the bag body 16 can be prevented from coming into contact with the natural ground and being damaged.

また、図5及び図6に示すように、杭部材8の複数箇所に内外を貫通する孔11を設けるとともに、杭部材8の内面8c側に袋体17を装着しておき、杭部材9の内面8c側にグラウト材15を充填することにより袋体17を膨出変形させ、袋体17の一部を各孔11を介して杭部材8の外面8b側に突出させるように構成してもよい。このように袋体17の一部を杭部材8の外面8b側に突出させることにより、杭部材8の外面8b側に所定の隙間14を確保することができる。
さらに、図示はしないが、杭部材8の内面8c側の各孔11に対応する部分にシート部材を設けて、シート部材の周縁部を各孔11の周縁部に接着剤等によって一体に接合しておき、杭部材8の内面8c側にグラウト材を充填することにより、各シート部材を膨出変形させて、各シート部材の一部を各孔11から杭部材8の外面8b側に突出させるように構成してもよい。このようにシート部材の一部を杭部材8の外面8b側に突出させることにより、杭部材8の外面8b側に所定の隙間14を確保することができる。
As shown in FIGS. 5 and 6, holes 11 penetrating inside and outside are provided in a plurality of locations of the pile member 8, and a bag body 17 is attached to the inner surface 8 c side of the pile member 8. The bag body 17 is expanded and deformed by filling the grout material 15 on the inner surface 8 c side, and a part of the bag body 17 is projected to the outer surface 8 b side of the pile member 8 through each hole 11. Good. In this manner, by projecting a part of the bag body 17 toward the outer surface 8b of the pile member 8, a predetermined gap 14 can be secured on the outer surface 8b side of the pile member 8.
Further, although not shown, a sheet member is provided in a portion corresponding to each hole 11 on the inner surface 8c side of the pile member 8, and the peripheral portion of the sheet member is integrally joined to the peripheral portion of each hole 11 with an adhesive or the like. In addition, by filling the grout material on the inner surface 8c side of the pile member 8, each sheet member is bulged and deformed, and a part of each sheet member is protruded from each hole 11 to the outer surface 8b side of the pile member 8. You may comprise as follows. As described above, by projecting a part of the sheet member to the outer surface 8b side of the pile member 8, a predetermined gap 14 can be secured on the outer surface 8b side of the pile member 8.

杭部材21は、杭部材8と同様の方法により、地山(盛土1、支持地盤4、及び支持層5)に角度を変えて複数本打設し、各杭部材21の外面21b側に形成された隙間14内、及び各杭部材21の内面21c側にセメントミルク等のグラウト材15を充填して固化させることにより、各杭部材21と地山(盛土1、支持地盤4、及び支持層5)とを一体化した斜め方向の小口径杭20を構築することができる。   A plurality of pile members 21 are placed on the ground (fill 1, support ground 4, and support layer 5) at different angles in the same manner as the pile members 8, and formed on the outer surface 21 b side of each pile member 21. Each pile member 21 and ground (the embankment 1, the support ground 4, and the support layer) are filled with the grout material 15 such as cement milk in the gap 14 and the inner surface 21 c side of each pile member 21 and solidified. The small-diameter pile 20 of the diagonal direction which integrated 5) can be constructed | assembled.

また、杭部材8と同様に、各杭部材21の外面21bの1箇所又は複数箇所に、各杭部材21の全周を覆う筒状の袋体16を取り付けておき、この袋体16の内部にグラウト材15を充填するように構成してもよい。さらに、各杭部材21の複数箇所に内外を貫通する孔23を設けるとともに、各杭部材21の内面23c側に袋体17を装着しておき、各杭部材21の内面23c側にグラウト材15を充填することにより袋体17を膨出変形させ、袋体17の一部を各孔23を介して各杭部材21の外面21b側に突出させるように構成してもよい。さらに、各杭部材21の内面23c側の各孔23に対応する部分にシート部材を設けておき、各杭部材21の内面23c側にグラウト材15を充填することにより、各シート部材を膨出変形させて、各シート部材の一部を各孔23から各杭部材21の外面21b側に突出させるように構成してもよい。   Moreover, the cylindrical bag body 16 which covers the perimeter of each pile member 21 is attached to one place or multiple places of the outer surface 21b of each pile member 21 similarly to the pile member 8, and the inside of this bag body 16 is attached. Alternatively, the grout material 15 may be filled. Furthermore, while providing the hole 23 which penetrates inside and outside in several places of each pile member 21, the bag body 17 is mounted | worn to the inner surface 23c side of each pile member 21, and the grout material 15 is installed in the inner surface 23c side of each pile member 21. The bag body 17 may be bulged and deformed by filling and a part of the bag body 17 may be protruded to the outer surface 21b side of each pile member 21 through each hole 23. Further, a sheet member is provided in a portion corresponding to each hole 23 on the inner surface 23c side of each pile member 21, and each sheet member is expanded by filling the grout material 15 on the inner surface 23c side of each pile member 21. You may make it deform | transform and may be comprised so that a part of each sheet member may protrude from each hole 23 to the outer surface 21b side of each pile member 21. FIG.

杭部材26は、杭部材8と同様の方法により、地山(盛土1)に打設し、杭部材26の外面26b側に形成された隙間14内、及び杭部材26の内面26c側にセメントミルク等のグラウト材15を充填して固化させることにより、杭部材26と地山(盛土1)とを一体化した略水平方向の小口径杭25を構築することができる。   The pile member 26 is cast in the natural ground (fill 1) by the same method as the pile member 8, and cemented in the gap 14 formed on the outer surface 26b side of the pile member 26 and on the inner surface 26c side of the pile member 26. By filling the grout material 15 such as milk and solidifying it, the small-diameter pile 25 in the substantially horizontal direction in which the pile member 26 and the ground (the embankment 1) are integrated can be constructed.

また、杭部材8と同様に、杭部材26の外面26bの1箇所又は複数箇所に、杭部材26の全周を覆う筒状の袋体16を取り付けておき、この袋体16の内部にグラウト材15を充填するように構成してもよい。さらに、杭部材26の複数箇所に内外を貫通する孔27を設けるとともに、杭部材26の内面26c側に袋体17を装着しておき、杭部材26の内面26c側にグラウト材15を充填することにより袋体17を膨出変形させ、袋体17の一部を孔27を介して各杭部材26の外面26b側に突出させるように構成してもよい。さらに、各杭部材26の内面26c側の各孔27に対応する部分にシート部材を設けておき、各杭部材26の内面26c側にグラウト材15を充填することにより、各シート部材を膨出変形させて、各シート部材の一部を各孔27から各杭部材26の外面26b側に突出させるように構成してもよい。   Similarly to the pile member 8, a cylindrical bag body 16 that covers the entire circumference of the pile member 26 is attached to one or a plurality of locations on the outer surface 26 b of the pile member 26, and a grout is formed inside the bag body 16. You may comprise so that the material 15 may be filled. Further, holes 27 penetrating the inside and outside of the pile member 26 are provided, the bag body 17 is mounted on the inner surface 26c side of the pile member 26, and the grout material 15 is filled on the inner surface 26c side of the pile member 26. Thus, the bag body 17 may be bulged and deformed, and a part of the bag body 17 may be protruded to the outer surface 26 b side of each pile member 26 through the hole 27. Furthermore, a sheet member is provided in a portion corresponding to each hole 27 on the inner surface 26c side of each pile member 26, and each sheet member is expanded by filling the grout material 15 on the inner surface 26c side of each pile member 26. You may make it deform | transform and may be comprised so that a part of each sheet member may protrude from each hole 27 to the outer surface 26b side of each pile member 26. FIG.

上記のように盛土1の一方の側面3aの所定の位置に設けられた略鉛直方向の小口径杭7と複数本の斜め方向の小口径杭20とによって補強杭群6が構成され、このような補強杭群6を盛土1の両側面3a、3bに長手方向に沿って所定の間隔ごとに複数箇所に設け、両側面3a、3bの対向する補強群6、6間を各補強杭群6に対応して設けられた略水平方向の小口径杭25によって連結する。   As described above, the reinforcing pile group 6 is configured by the substantially vertical small-diameter pile 7 and the plurality of oblique small-diameter piles 20 provided at predetermined positions on the one side surface 3a of the embankment 1, and thus Reinforced pile groups 6 are provided at a plurality of locations along the longitudinal direction on both side surfaces 3a, 3b of the embankment 1, and each reinforced pile group 6 between the opposing reinforcing groups 6, 6 on both side surfaces 3a, 3b is provided. Are connected by a small horizontal pile 25 provided in a substantially horizontal direction.

この場合、図8に示すように、盛土1の両側面3a、3bに、両側面3a、3bの複数の補強杭群6同士が互いに正対するように設け、対向する補強杭群6間を略水平方向の小口径杭25によって連結してもよいし、図9に示すように、一方の側面3aの複数の補強杭群6と他方の側面3bの複数の補強杭群6とが斜めに対向するように、各側面3a、3bに複数の補強杭群6を設け、斜め方向に対向する補強杭群6間を略水平方向の小口径杭25によって連結してもよい。図9に示すような構成とした場合には、複数の補強杭群6によってトラス構造を構成することができる。   In this case, as shown in FIG. 8, it is provided on both side surfaces 3a and 3b of the embankment 1 so that the plurality of reinforcing pile groups 6 on both side surfaces 3a and 3b face each other. You may connect by the small diameter pile 25 of a horizontal direction, and as shown in FIG. 9, the some reinforcement pile group 6 of the one side surface 3a and the some reinforcement pile group 6 of the other side surface 3b oppose diagonally. As described above, a plurality of reinforcing pile groups 6 may be provided on each of the side surfaces 3a and 3b, and the reinforcing pile groups 6 opposed in the oblique direction may be connected by a small-diameter pile 25 in a substantially horizontal direction. In the case of the configuration as shown in FIG. 9, the truss structure can be configured by the plurality of reinforcing pile groups 6.

上記のように構成した本実施の形態の盛土の補強工法にあっては、1本の略鉛直方向の小口径杭7の杭部材8の頭部9と複数本の斜め方向の小口径杭20の杭部材21の頭部22とを連結具30によって剛結合することによって1つの補強杭群6を構成し、このような補強杭群6を盛土1の両側面3a、3bに長手方向に所定の間隔ごとに複数箇所に設け、両側面3a、3bの対向する両補強杭群6の略鉛直方向の小口径杭7の杭部材8及び各斜め方向の小口径杭20の杭部材21の頭部9、22間を略水平方向の小口径杭25の杭部材26の両端部26a、26aで連結し、杭部材26の両端部26a、26aと両補強杭群6の杭部材8及び各杭部材21の頭部9、22とを連結具30によって剛結合したことにより、以下のような作用効果を奏する。   In the embankment reinforcement method of the present embodiment configured as described above, the head 9 of the pile member 8 of the single small-diameter pile 7 in the substantially vertical direction and the multiple small-diameter piles 20 in the oblique direction. One reinforcing pile group 6 is configured by rigidly connecting the head portion 22 of the pile member 21 with a connector 30, and the reinforcing pile group 6 is predetermined on both side surfaces 3 a and 3 b of the embankment 1 in the longitudinal direction. The heads of the pile members 21 of the small-diameter piles 7 in the substantially vertical direction and the pile members 21 of the small-diameter piles 20 in the respective oblique directions are provided at a plurality of intervals for each interval of both sides 3a and 3b. The portions 9 and 22 are connected to each other at both ends 26a and 26a of the pile member 26 of the small-diameter pile 25 in the substantially horizontal direction, and both the ends 26a and 26a of the pile member 26 and the pile member 8 of each reinforcing pile group 6 and each pile. Since the heads 9 and 22 of the member 21 are rigidly connected by the connecting tool 30, the following effects are obtained. Achieve the.

水平荷重(例えば、地震に伴う水平方向の慣性力)に対しては、図10に示すように、盛土1の両側面3a、3bの剛結合部(支点部A)で補強杭群6の略鉛直方向の小口径杭7の杭部材8の頭部9、各斜め方向の小口径杭20の杭部材21の頭部22、略水平方向の小口径杭25の杭部材26の端部26aを連結しているので、略鉛直方向の小口径杭7、各斜め方向の小口径杭20、及び略水平方向の小口径杭25に作用する力を剛結合部(支点部A)に集中させることができ、この力を略水平方向の小口径杭25を介して対向する反対側の補強杭群6の剛結合部(支点部B)に伝達させ、反対側の補強杭群6の略鉛直方向の小口径杭7、各斜め方向の小口径杭20に分散させることができる。
例えば、図10の左方向(矢印)への慣性力が作用した場合には、盛土1の側面3b側の部分には引張力が作用し、側面3a側には圧縮力が作用することになるが、これらの荷重を側面3b側の小口径杭7、20、側面3a側の小口径杭7、20、及び両側面3a、3b間の小口径杭25によって支持することができるので、盛土1の変形を抑制することができる。また、図10の右方向への慣性力が作用した場合には、盛土1の側面3b側の部分には圧縮力が作用し、側面3a側には引張力が作用することになるが、これらの荷重を側面3b側の小口径杭7、20、側面3a側の小口径杭7、20、及び両側面3a、3b間の小口径杭25によって支持することができるので、盛土1の変形を抑制することができる。
従って、盛土1の両側面3a、3bの両補強杭群6の相互作用により、水平荷重に抵抗することができるので、盛土1に、滑り、水平方向の変形等が生じるようなことはなく、盛土1を初期の断面形状に保つことができ、盛土1全体の安定性を確保することができる。
For horizontal loads (for example, horizontal inertia force accompanying an earthquake), as shown in FIG. 10, the reinforcing pile group 6 is abbreviated at the rigid coupling portions (fulcrum portions A) of both side surfaces 3 a and 3 b of the embankment 1. The head portion 9 of the pile member 8 of the small-diameter pile 7 in the vertical direction, the head portion 22 of the pile member 21 of each small-diameter pile 20 in the oblique direction, and the end portion 26a of the pile member 26 of the small-diameter pile 25 in the substantially horizontal direction. Since they are connected, the force acting on the small-diameter pile 7 in the substantially vertical direction, the small-diameter pile 20 in each oblique direction, and the small-diameter pile 25 in the substantially horizontal direction is concentrated on the rigid coupling portion (fulcrum portion A). This force can be transmitted to the rigid coupling portion (fulcrum portion B) of the opposite reinforcing pile group 6 via the small horizontal pile 25 in the substantially horizontal direction, and the substantially vertical direction of the reinforcing pile group 6 on the opposite side. The small-diameter pile 7 and the small-diameter pile 20 in each oblique direction can be dispersed.
For example, when an inertial force in the left direction (arrow) in FIG. 10 acts, a tensile force acts on the side surface 3b side portion of the embankment 1 and a compressive force acts on the side surface 3a side. However, these loads can be supported by the small-diameter piles 7 and 20 on the side surface 3b side, the small-diameter piles 7 and 20 on the side surface 3a side, and the small-diameter pile 25 between the side surfaces 3a and 3b. Can be suppressed. In addition, when an inertial force in the right direction in FIG. 10 acts, a compressive force acts on the side surface 3b side portion of the embankment 1 and a tensile force acts on the side surface 3a side. Can be supported by the small-diameter piles 7 and 20 on the side surface 3b side, the small-diameter piles 7 and 20 on the side surface 3a side, and the small-diameter pile 25 between the side surfaces 3a and 3b. Can be suppressed.
Therefore, since the horizontal load can be resisted by the interaction of the two reinforcing pile groups 6 on the both side surfaces 3a and 3b of the embankment 1, the embankment 1 does not slip, deform in the horizontal direction, etc. The embankment 1 can be maintained in the initial cross-sectional shape, and the stability of the entire embankment 1 can be ensured.

鉛直荷重(例えば、自動車による活荷重、地震に伴う鉛直方向の慣性力)に対しては、図11に示すように、盛土1に鉛直下向きの荷重が作用した場合には、略鉛直方向の小口径杭7及び各斜め方向の小口径杭20に圧縮抵抗力が発生することにより、盛土1内部に大きな圧縮力が作用するのを防止できる。反対に、盛土1に鉛直上向きの荷重(地震の鉛直動のうち、上向きの慣性力が作用する場合)が作用した場合には、略鉛直方向の小口径杭7及び各斜め方向の小口径杭20に引張抵抗力が発生することにより、盛土1内部に大きな引張力が作用するのを防止できる。盛土1内部に鉛直上向きと下向きの歪が大きく作用する(両振幅)と、盛土1内部の沈下を助長する可能性が高いが、複数の補強杭群6の略鉛直方向の小口径杭7及び各斜め方向の小口径杭20によりこのような現象を抑制することができる。従って、鉛直荷重に抵抗することができるので、盛土1に沈下、水平方向の変形等が生じるようなことはなく、盛土1を初期の断面形状に保つことができ、盛土1全体の安定性を確保することができる。   As shown in FIG. 11, when a vertical downward load is applied to the embankment 1 as shown in FIG. By generating a compressive resistance force in the caliber pile 7 and the small caliber pile 20 in each oblique direction, it is possible to prevent a large compressive force from acting on the inside of the embankment 1. On the other hand, when a vertical upward load is applied to the embankment 1 (when an upward inertial force is applied to the vertical motion of the earthquake), the small-diameter pile 7 in the substantially vertical direction and the small-diameter pile in each oblique direction By generating a tensile resistance force at 20, it is possible to prevent a large tensile force from acting inside the embankment 1. When vertical upward and downward strains act greatly inside the embankment 1 (both amplitudes), there is a high possibility of promoting the settlement within the embankment 1, but the small-diameter piles 7 in the substantially vertical direction of the plurality of reinforcing pile groups 6 and Such a phenomenon can be suppressed by the small-diameter pile 20 in each oblique direction. Therefore, since the vertical load can be resisted, the embankment 1 does not sink, is not deformed in the horizontal direction, and the embankment 1 can be maintained in the initial cross-sectional shape, and the stability of the embankment 1 as a whole is improved. Can be secured.

また、略鉛直方向の小口径杭7の杭部材8、各斜め方向の小口径杭20の杭部材21、及び略水平方向の小口径杭25の杭部材26の外面側に隙間14を設け、その隙間14内にグラウト材15を充填するように構成したので、杭部材8、各杭部材21、及び杭部材26に錆が発生するのを防止できる。   Further, a gap 14 is provided on the outer surface side of the pile member 8 of the small-diameter pile 7 in the substantially vertical direction, the pile member 21 of the small-diameter pile 20 in each oblique direction, and the pile member 26 of the small-diameter pile 25 in the substantially horizontal direction, Since the grout material 15 is filled in the gap 14, it is possible to prevent rust from occurring in the pile member 8, each pile member 21, and the pile member 26.

さらに、杭部材8、各杭部材21、及び杭部材26の外面側に袋体16を設け、袋体16の内部にグラウト材15を充填することにより、杭部材8、各杭部材21、及び杭部材26を被覆するように構成したので、杭部材8、各杭部材21、及び杭部材26の錆び易い部分に袋体16を設けることにより、杭部材8、各杭部材21、及び杭部材26に錆が発生するのを防止できる。   Furthermore, by providing the bag body 16 on the outer surface side of the pile member 8, each pile member 21, and the pile member 26, and filling the grout material 15 inside the bag body 16, the pile member 8, each pile member 21, and Since it comprised so that the pile member 26 might be coat | covered, the pile member 8, each pile member 21, and a pile member are provided by providing the bag body 16 in the part which is easy to rust of the pile member 8, each pile member 21, and the pile member 26. 26 can prevent rust from being generated.

さらに、杭部材8、各杭部材21、及び杭部材26に内外を貫通する孔11、23、27を設けるとともに、内面側に袋体17を設けて、袋体17の内部にグラウト材15を充填することにより袋体17を膨出変形させて、袋体17の一部を孔13、23、27から杭部材8、各杭部材211、及び杭部材26の外面側に突出させるように構成したので、杭部材8、各杭部材21、及び杭部材26の外面側に所定の隙間14を確保でき、その隙間14にグラウト材15を充填することにより杭部材8、各杭部材21、及び杭部材26に錆びが発生するのを防止できる。   Further, the pile member 8, each pile member 21, and the pile member 26 are provided with holes 11, 23, and 27 that penetrate the inside and outside, the bag body 17 is provided on the inner surface side, and the grout material 15 is provided inside the bag body 17. The bag body 17 is bulged and deformed by filling, and a part of the bag body 17 is protruded from the holes 13, 23, and 27 to the outer surface side of the pile member 8, each pile member 211, and the pile member 26. Thus, the predetermined gap 14 can be secured on the outer surface side of the pile member 8, each pile member 21, and the pile member 26, and the pile member 8, each pile member 21, and It is possible to prevent the pile member 26 from being rusted.

さらに、各補強杭群6が設けられている盛土1の各地点において、その部分に生じる沈下、あらゆる方向の滑りを各補強杭群6の鉛直方向の小口径杭7及び各斜め方向の小口径杭20によって抑制できる。   Furthermore, at each point of the embankment 1 where each reinforcing pile group 6 is provided, subsidence and slipping in all directions caused by the subsidence occur in that portion, and the small-diameter pile 7 in the vertical direction of each reinforcing pile group 6 and the small-diameter in each oblique direction. It can be suppressed by the pile 20.

さらに、盛土1の両側面3a、3bの複数の補強杭群6と、対向する補強杭群6、6間を連結する略水平方向の小口径杭25とにより、盛土1に何れの方向から荷重が作用しても、それらの荷重に抵抗することができるので、盛土1を初期の断面形状に保つことができ、盛土1に大きなすべりや沈下が生じるのを防止できる。   Furthermore, load is applied to the embankment 1 from any direction by the plurality of reinforcing pile groups 6 on the both side surfaces 3a and 3b of the embankment 1 and the small-diameter pile 25 in the substantially horizontal direction connecting the opposing reinforcing pile groups 6 and 6. Even if this works, the load 1 can be resisted, so that the embankment 1 can be maintained in the initial cross-sectional shape, and large slip and subsidence can be prevented from occurring in the embankment 1.

さらに、盛土1の両側面3a、3bから各補強杭群6を施工することになるので、盛土1を鉄道や道路等の築堤として利用しながら施工することも可能となる。さらに、盛土1の両側面3a、3bに鋼矢板(シートパイル)等が設けられている場合には、鋼矢板等をドリルで貫通した後に、盛土1に各杭部材8、21、26を打設することができるので、そのような状況でも施工することが可能となる。   Furthermore, since each reinforcement pile group 6 is constructed from the both side surfaces 3a and 3b of the embankment 1, it is also possible to construct the embankment 1 while using it as embankments such as railways and roads. Further, when steel sheet piles (sheet piles) or the like are provided on both side surfaces 3a and 3b of the embankment 1, the pile members 8, 21, and 26 are driven into the embankment 1 after penetrating the steel sheet piles and the like with a drill. Therefore, it is possible to construct even in such a situation.

なお、前記の説明においては、連結具30をガイドとして、杭部材8、杭部材21、杭部材26を地山に打設したが、杭部材8、杭部材21、及び杭部材26を地山に打設した
後に、杭部材8の頭部9と杭部材21の頭部22と杭部材26の端部26aとを連結具30により連結してもよい。
In the above description, the pile member 8, the pile member 21, and the pile member 26 are driven on the ground using the connector 30 as a guide. However, the pile member 8, the pile member 21, and the pile member 26 are placed on the ground. The head 9 of the pile member 8, the head 22 of the pile member 21, and the end 26 a of the pile member 26 may be connected by the connecting tool 30.

この場合、杭部材8、杭部材21、及び杭部材26の打設位置が所定の位置からずれる場合もあるので、そのような場合には、打設した杭部材8の頭部9、杭部材21の頭部22、及び杭部材26の端部26aにそれぞれ第1取付部31、第2取付部32、及び第3取付部33を取り付けた後に、第1取付部31と第2取付部32との間隔に合わせた寸法の連結板34、隣接する第2取付部32、32間の間隔に合わせた寸法の連結板34、第2取付部32と第3取付部33との間隔に合わせた寸法の連結板34を用意し、この連結板34により第1取付部31と第2取付部32との間、隣接する第2取付部32、32間、及び第2取付部32と第3取付部33との間を連結するように構成すればよい。   In this case, since the placement positions of the pile member 8, the pile member 21, and the pile member 26 may deviate from predetermined positions, in such a case, the head 9 of the pile member 8 that is placed, the pile member After attaching the first attachment portion 31, the second attachment portion 32, and the third attachment portion 33 to the head portion 22 of 21 and the end portion 26a of the pile member 26, respectively, the first attachment portion 31 and the second attachment portion 32 are attached. The connecting plate 34 having a size matched to the interval between the second mounting portions 32 and 32, the connecting plate 34 having a size matching the spacing between the adjacent second mounting portions 32, and the spacing between the second mounting portion 32 and the third mounting portion 33. A connecting plate 34 having a size is prepared, and the connecting plate 34 is provided between the first mounting portion 31 and the second mounting portion 32, between the adjacent second mounting portions 32 and 32, and between the second mounting portion 32 and the third mounting portion. What is necessary is just to comprise so that between the parts 33 may be connected.

なお、前記の説明においては、盛土2の複数箇所に補強杭群6を設けたが、1箇所のみに補強杭群6を設けるように構成してもよい。   In addition, in the said description, although the reinforcement pile group 6 was provided in the several places of the embankment 2, you may comprise so that the reinforcement pile group 6 may be provided only in one place.

また、前記の説明においては、補強杭群6を、1本の略鉛直方向の小口径杭7と複数本の斜め方向の小口径杭20とによって構成したが、基礎地盤4の条件によっては、補強杭群6を、1本の略鉛直方向の小口径杭7と1本の斜め方向の小口径杭20とによって構成してもよい。   Further, in the above description, the reinforcing pile group 6 is configured by one substantially vertical small-diameter pile 7 and a plurality of oblique small-diameter piles 20, but depending on the conditions of the foundation ground 4, The reinforcing pile group 6 may be constituted by a single small-diameter pile 7 in a substantially vertical direction and a single small-diameter pile 20 in an oblique direction.

さらに、前記の説明においては、杭部材8、21を、先端8a、21aが支持層5に達する深さまで打設したが、十分な摩擦抵抗力が得られる場合には、杭部材8、21の先端8a、21aを基礎地盤4内で止めるように構成してもよい。   Furthermore, in the above description, the pile members 8 and 21 are driven to the depth where the tips 8a and 21a reach the support layer 5. However, when sufficient frictional resistance is obtained, the pile members 8 and 21 You may comprise so that the front-end | tips 8a and 21a may be stopped in the foundation ground 4. FIG.

さらに、前記の説明においては、略鉛直方向の小口径杭7の頭部9と斜め方向の小口径杭20の頭部22と略水平方向の小口径杭25の端部26aとを剛結合したが、それらをヒンジ結合又はスライド結合として、所定の荷重までは回動又はスライド可能、所定以上の荷重では剛結合としてもよいし、或いは、それらをヒンジ結合又はスライド結合として、所定の荷重までは剛結合、所定以上の荷重では回動可能又はスライド可能に構成してもよい。このような結合にしても、上述した剛結合のものと同様の作用効果を奏する。   Furthermore, in the above description, the head portion 9 of the small-diameter pile 7 in the substantially vertical direction, the head portion 22 of the small-diameter pile 20 in the oblique direction, and the end portion 26a of the small-diameter pile 25 in the substantially horizontal direction are rigidly coupled. However, they can be rotated or slid until a predetermined load as a hinge connection or a slide connection, and may be a rigid connection at a load higher than a predetermined load, or they may be a hinge connection or a slide connection until a predetermined load. It may be configured to be rigidly coupled or rotatable or slidable with a predetermined load or more. Even in such a connection, the same effect as the rigid connection described above is obtained.

1 盛土
2 上面
3 側面
3a 一方の側面
3b 他方の側面
4 基礎地盤
5 支持層
6 補強杭群
7 略鉛直方向の小口径杭
8 杭部材
8a 先端
8b 外面
8c 内面
9 頭部
10 突起
11 孔
12 板材
13 先端ビット
14 隙間
15 グラウト材
16 袋体
17 袋体
20 斜め方向の小口径杭
21 杭部材
21a 先端
21b 外面
21c 内面
22 頭部
23 孔
25 略水平方向の小口径杭
26 杭部材
26a 端部
26b 外面
26c 内面
27 孔
30 連結具
31 第1取付部
32 第2取付部
33 第3取付部
34 連結板
DESCRIPTION OF SYMBOLS 1 Embankment 2 Upper surface 3 Side surface 3a One side surface 3b The other side surface 4 Foundation ground 5 Support layer 6 Reinforcement pile group 7 Small-diameter pile of substantially vertical direction 8 Pile member 8a Tip 8b Outer surface 8c Inner surface 9 Head 10 Protrusion 11 Hole 12 Plate material 13 tip bit 14 gap 15 grout material 16 bag body 17 bag body 20 small-diameter pile in diagonal direction 21 pile member 21a tip 21b outer surface 21c inner surface 22 head 23 hole 25 small-diameter pile in substantially horizontal direction 26 pile member 26a end 26b Outer surface 26c Inner surface 27 Hole 30 Connecting tool 31 First mounting portion 32 Second mounting portion 33 Third mounting portion 34 Connecting plate

Claims (6)

基礎地盤の上部に造成された盛土を引張荷重及び圧縮荷重に抵抗可能な強度を有する杭により補強する盛土の補強工法であって、
前記盛土に、前記杭を略鉛直方向に打設するとともに、その近傍に、前記杭を斜め方向に打設し、前記略鉛直方向の杭の頭部と前記斜め方向の杭の頭部とを結合して補強杭群を構成し、この補強杭群を前記盛土の両側面の少なくとも1箇所に設け、前記両側面の対向する両補強杭群に対応するように、前記盛土に、前記杭を略水平方向に打設し、該略水平方向の杭の両端部と前記両補強杭群の前記略鉛直方向の杭の頭部と前記斜め方向の杭の頭部とを結合し、前記斜め方向の杭は、当該斜め方向の杭を含む前記補強杭群と対向して前記盛土の反対側の側面に設けられた前記補強杭群の何れの杭とも接続されていないことを特徴とする盛土の補強工法。
It is a reinforcement method for embankment that reinforces the embankment built on the upper part of the foundation ground with a pile having strength that can resist tensile load and compressive load,
In the embankment, the pile is driven in a substantially vertical direction, and in the vicinity thereof, the pile is driven in an oblique direction, and the substantially vertical pile head and the oblique pile head are provided. Combined to form a reinforcing pile group, this reinforcing pile group is provided in at least one place on both side surfaces of the embankment, and the pile is placed on the embankment so as to correspond to both opposing reinforcing pile groups on the both side surfaces. Driving in a substantially horizontal direction, combining both ends of the substantially horizontal pile, the heads of the substantially vertical piles and the heads of the oblique piles of the two reinforcing pile groups, and the oblique direction The pile is not connected to any pile of the reinforcing pile group provided on the side surface on the opposite side of the embankment facing the reinforcing pile group including the diagonal pile . Reinforcement method.
前記各杭の周囲に隙間を設け、該隙間内にグラウト材を充填することを特徴とする請求項1に記載の盛土の補強工法。   2. The embankment reinforcement method according to claim 1, wherein a gap is provided around each of the piles, and a grout material is filled in the gap. 前記各杭の先端を斜めに切断してこの先端面単一の板材を取り付け、該板材の一部を前記各杭の外面から突出させ、前記各杭と前記板材とを一体に回転させることにより、前記各杭の周囲に前記隙間を設けることを特徴とする請求項2に記載の盛土の補強工法。 Cutting the tip of each pile diagonally and attaching a single plate material to this tip surface , projecting a part of the plate material from the outer surface of each pile, and rotating each pile and the plate material together The reinforcement method for embankment according to claim 2, wherein the gap is provided around each of the piles. 前記各杭の先端に前記各杭よりも大径の先端ビットを設け、前記先端ビットを回転させることにより、前記各杭の周囲に前記隙間を設けることを特徴とする請求項2に記載の盛土の補強工法。   The embankment according to claim 2, wherein a tip bit having a diameter larger than that of each pile is provided at a tip of each pile, and the gap is provided around each pile by rotating the tip bit. Reinforcement construction method. 前記各杭の地下水が作用する部位に、前記各杭の周囲を覆う袋体を設け、該袋体の内部にグラウト材を充填することを特徴とする請求項1〜4の何れか1項に記載の盛土の補強工法。 The bag body which covers the circumference | surroundings of each said pile is provided in the site | part to which the groundwater of each said pile acts , The grout material is filled into this bag body in any one of Claims 1-4 characterized by the above-mentioned. The embankment reinforcement method described. 基礎地盤の上部に造成された盛土に、引張荷重及び圧縮荷重に抵抗可能な強度を有する杭を略鉛直方向に打設するとともに、その近傍に、前記杭を斜め方向に打設し、前記略鉛直方向の杭の頭部と前記斜め方向の杭の頭部とを結合して補強杭群を構成し、この補強杭群を前記盛土の両側面の少なくとも1箇所に設け、前記両側面の対向する両補強杭群に対応するように、前記盛土に、前記杭を略水平方向に打設し、該略水平方向の杭の両端部と前記両補強杭群の前記略鉛直方向の杭の頭部と前記斜め方向の杭の頭部とを結合して前記盛土を補強する盛土の補強工法であって、
前記各杭の複数箇所に内外を貫通する孔を設けるとともに、前記各杭の内部に袋体を設け、該袋体の内部にグラウト材を充填して膨出変形させることにより、前記袋体の一部を前記孔から前記各杭の外面側に突出させ、又は前記各杭の内部の前記各孔に対応する部分にそれぞれシート部材を設け、前記各杭の内部にグラウト材を充填することにより、前記各シート部材を膨出変形させて前記各シート部材の一部を前記各孔から前記各杭の外面側に突出させることを特徴とする盛土の補強工法。
A pile having a strength capable of resisting a tensile load and a compressive load is driven in a substantially vertical direction on the embankment formed on the upper part of the foundation ground, and the pile is driven in an oblique direction in the vicinity thereof. A head of the pile in the vertical direction and a head of the pile in the oblique direction are combined to form a reinforcing pile group, and the reinforcing pile group is provided at at least one place on both sides of the embankment, The piles are driven substantially horizontally in the embankment so as to correspond to both reinforcing pile groups, and both ends of the substantially horizontal piles and the heads of the substantially vertical piles of the two reinforcing pile groups. The embankment reinforcing method for reinforcing the embankment by combining the portion and the head of the pile in the oblique direction,
By providing holes penetrating the inside and outside at a plurality of locations of each pile, providing a bag body inside each pile, filling the inside of the bag body with a grout material, and bulging and deforming the bag body, By projecting a part from the hole to the outer surface side of each pile, or providing a sheet member at each of the holes corresponding to each hole inside the pile, and filling the grout material inside each pile , Retrofit for Sheng soil you characterized in that protrudes above a portion of the respective sheet members each sheet member is bulged deformed from the respective holes on the outer surface of each pile.
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