JP2018109308A - Foundation structure, method for constructing foundation structure, and consolidation support member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a foundation structure, a method for constructing a foundation structure, and a consolidation support member, which make it possible to more efficiently and effectively prevent the unequal settlement of a building.SOLUTION: A foundation structure comprises a consolidation support member 2 disposed to penetrate downward from a bottom portion 1a of a drilling hole 1 formed by drilling the ground G, a consolidation portion 3 compacted and formed in the ground G while penetrating the consolidation support member 2 into the ground G and pressing downward the ground G from the bottom 1a of the drilling hole 1, and a foundation body 5 formed by casting foundation concrete on the consolidation support member 2. The consolidation support member 2 includes a penetration portion 2a penetrating the ground G and a pressure receiving portion 2d attached to the penetration portion 2a and extending in the transverse direction T2 and abutting against the bottom portion 1a of the drilling hole 1.SELECTED DRAWING: Figure 1

Description

本発明は、例えば住宅などの建造物の基礎構造及び基礎構造の施工方法、並びに圧密支持部材に関する。   The present invention relates to a foundation structure of a building such as a house, a construction method of the foundation structure, and a consolidation support member.

住宅やマンションなどの建物（構造物）を軟弱地盤や、埋土、盛土の造成地に構築した際に不同沈下が生じるケースがある。このため、このような軟弱地盤や盛土地盤に建物を構築する際には、予め、セメント系固化材を用いて地盤改良を行ったり、鋼管杭などの支持杭を打設するなどして不同沈下の発生を防止するようにしている（例えば、特許文献１参照）。   There are cases where uneven settlement occurs when a building (structure) such as a house or apartment is built on soft ground, buried land, or embankment. For this reason, when building a building on such soft ground or embankment, it is necessary to improve the ground using cement-based solidified material beforehand, or to place support piles such as steel pipe piles, etc. Is prevented (for example, see Patent Document 1).

特開２０１４−０２５２４５号公報JP 2014-025245 A

一方、造成時の締固め不足や圧縮性の高い盛土材の使用などに起因して不同沈下が発生するような地盤においては、セメント系固化材を用いた地盤改良や支持杭の効果が設計通りに得られないケースがある。   On the other hand, in the ground where uneven settlement occurs due to insufficient compaction at the time of creation or the use of highly compressible embankment materials, the effects of the ground improvement using cement-based solidification material and support piles are as designed. There are cases that cannot be obtained.

また、敷地の制限などにより、地盤改良、支持杭の打設を行うための大型の建設作業機を用いることができず、地盤改良や支持杭による対策自体を採用できないケースもある。   In addition, due to site restrictions, etc., large construction machines for ground improvement and support pile placement cannot be used, and there are cases in which measures for ground improvement and support piles themselves cannot be adopted.

このため、より効率的且つ効果的に建物の不同沈下を防止できる手法が強く求められていた。   For this reason, there has been a strong demand for a technique that can more efficiently and effectively prevent uneven settlement of buildings.

本発明は、上記事情に鑑み、より効率的且つ効果的に建物の不同沈下を防止することを可能にする基礎構造及び基礎構造の施工方法、並びに圧密支持部材を提供することを目的とする。   In view of the above circumstances, an object of the present invention is to provide a foundation structure, a construction method of the foundation structure, and a consolidation support member that can more efficiently and effectively prevent uneven settlement of a building.

上記の目的を達するために、この発明は以下の手段を提供している。   In order to achieve the above object, the present invention provides the following means.

本発明の基礎構造は、地盤を掘削して形成した掘削孔の底部から下方に貫入して配設される圧密支持部材と、前記圧密支持部材を地盤に貫入しつつ前記掘削孔の底部から下方の地盤を押圧し、地盤に圧密形成される圧密部と、前記圧密支持部材の上に基礎コンクリートを打設して形成される基礎本体とを備え、且つ、前記圧密支持部材が、前記地盤に貫入する貫入部と、前記貫入部に取り付けられるとともに横方向に延設されて前記掘削孔の底部に当接する受圧部とを備えて構成されていることを特徴とする。   The foundation structure of the present invention includes a consolidation support member that is provided by penetrating downward from the bottom of a drilling hole formed by excavating the ground, and a bottom from the bottom of the drilling hole while penetrating the consolidation support member into the ground. And a foundation body formed by placing foundation concrete on the compaction support member, and the compaction support member is provided on the ground. It is characterized by comprising a penetrating part that penetrates and a pressure receiving part that is attached to the penetrating part and extends laterally and abuts against the bottom of the excavation hole.

本発明の基礎構造の施工方法は、地盤を掘削して掘削孔を形成する掘削孔形成工程と、地盤に貫入する貫入部、及び前記貫入部に取り付けられるとともに横方向に延設された受圧部を備えてなる圧密支持部材を前記掘削孔に挿入し、前記掘削孔の底部から地盤に貫入部を貫入し、且つ前記受圧部で前記掘削孔の底部を押圧し、前記掘削孔の底部から下方の地盤を圧密させて圧密部を形成する圧密支持部材設置工程と、前記圧密支持部材の上方に基礎コンクリートを打設して基礎本体を形成する基礎本体形成工程とを備えることを特徴とする。   The construction method of the foundation structure of the present invention includes an excavation hole forming step of excavating the ground to form an excavation hole, an intrusion portion penetrating into the ground, and a pressure receiving portion attached to the intrusion portion and extending in the lateral direction A compaction support member comprising: a hole is inserted into the excavation hole, the penetration portion is penetrated into the ground from the bottom portion of the excavation hole, and the bottom portion of the excavation hole is pressed by the pressure receiving portion, and the lower portion is lowered from the bottom portion of the excavation hole. A consolidation support member installation step of forming a consolidation portion by compacting the ground of the base, and a foundation body formation step of forming a foundation body by placing foundation concrete above the consolidation support member.

本発明の圧密支持部材は、上方に基礎コンクリートを打設して形成される基礎本体を支持するための圧密支持部材であって、地盤に貫入する貫入部と、前記貫入部に取り付けられ、前記貫入部から横方向に延設される受圧部とを備えて構成されていることを特徴とする。   The consolidation support member of the present invention is a consolidation support member for supporting a foundation main body formed by placing foundation concrete on the upper side, a penetration portion penetrating into the ground, and attached to the penetration portion, And a pressure receiving portion extending in the lateral direction from the penetration portion.

また、本発明の圧密支持部材においては、前記貫入部が、棒状に形成されるとともに、上端部側に軸線中心の径方向の横方向に延出する板状の補強部を一体に備えて形成され、且つ前記受圧部が中央に挿通孔を備えて環状に形成され、前記挿通孔に前記貫入部を挿通し、前記受圧部が前記補強部に当接して配設されていることが望ましい。   In the compaction support member of the present invention, the penetration portion is formed in a rod shape, and is integrally provided with a plate-like reinforcement portion extending in the radial direction about the axis center on the upper end side. Preferably, the pressure receiving portion is formed in an annular shape with an insertion hole in the center, the insertion portion is inserted into the insertion hole, and the pressure receiving portion is disposed in contact with the reinforcing portion.

さらに、本発明の圧密支持部材においては、棒状の前記貫入部の前記補強部よりも上方がジョイント部とされるとともに、前記ジョイント部に取り付けられる載荷アタッチメント部を備えており、前記載荷アタッチメント部が、前記ジョイント部を挿通して嵌合させる内孔を備えた筒状の嵌合部と、前記嵌合部の外面から前記軸線中心の径方向外側に突出し、前記ジョイント部に取り付けた状態で前記受圧部に当接する加圧部とを備えて構成されていることがより望ましい。   Furthermore, in the consolidation support member of the present invention, the upper part of the bar-shaped penetration part is a joint part and includes a loading attachment part attached to the joint part. A cylindrical fitting portion provided with an inner hole through which the joint portion is inserted and fitted, and the outer surface of the fitting portion protrudes radially outward from the axial center, and is attached to the joint portion. It is more desirable that the pressure receiving unit is configured to be in contact with the pressure receiving unit.

本発明の基礎構造及び基礎構造の施工方法、並びに圧密支持部材によれば、従来と比較し、より効率的且つ効果的に建物の不同沈下を防止（抑止）することが可能になる。   According to the foundation structure, the construction method of the foundation structure, and the consolidation support member of the present invention, it is possible to prevent (suppress) the uneven settlement of the building more efficiently and effectively than in the past.

本発明の一実施形態に係る基礎構造を示す図である。It is a figure which shows the basic structure which concerns on one Embodiment of this invention. 本発明の一実施形態に係る基礎構造の圧密支持部材を示す正面図である。It is a front view which shows the consolidation support member of the foundation structure which concerns on one Embodiment of this invention. 図２のＸ１−Ｘ１線矢視図であり、本発明の一実施形態に係る基礎構造の圧密支持部材を示す平面図である。It is a X1-X1 arrow directional view of FIG. 2, and is a top view which shows the compaction supporting member of the foundation structure which concerns on one Embodiment of this invention. 本発明の一実施形態に係る基礎構造の圧密支持部材を示す分解図である。It is an exploded view which shows the consolidation support member of the foundation structure which concerns on one Embodiment of this invention. 本発明の一実施形態に係る基礎構造の圧密支持部材の貫入部、補強部、ジョイント部を示す正面図である。It is a front view which shows the penetration part, reinforcement part, and joint part of the consolidation support member of the foundation structure which concern on one Embodiment of this invention. 図５のＸ１−Ｘ１線矢視図である。FIG. 6 is a view taken along line X1-X1 in FIG. 5. 本発明の一実施形態に係る基礎構造の圧密支持部材の受圧部を示す平面図である。It is a top view which shows the pressure receiving part of the consolidation support member of the foundation structure which concerns on one Embodiment of this invention. 本発明の一実施形態に係る基礎構造の圧密支持部材の載荷アタッチメント部を示す正面図である。It is a front view which shows the loading attachment part of the consolidation support member of the foundation structure which concerns on one Embodiment of this invention. 図８のＸ１−Ｘ１線矢視図である。It is a X1-X1 line arrow directional view of FIG. 本発明の一実施形態に係る基礎構造の施工方法において、地盤に掘削孔を掘削形成した状態を示す図である。In the construction method of the foundation structure which concerns on one Embodiment of this invention, it is a figure which shows the state which excavated and formed the excavation hole in the ground. 本発明の一実施形態に係る基礎構造の施工方法において、圧密支持部材の貫入部を地盤に貫入させた状態を示す図である。In the construction method of the foundation structure which concerns on one Embodiment of this invention, it is a figure which shows the state which penetrated the penetration part of the compaction supporting member to the ground. 本発明の一実施形態に係る基礎構造の施工方法において、圧密支持部材を押圧して圧密部を形成した状態を示す図である。In the construction method of the foundation structure which concerns on one Embodiment of this invention, it is a figure which shows the state which pressed the consolidation support member and formed the consolidation part.

以下、図１から図１２を参照し、本発明の一実施形態に係る基礎構造及び基礎構造の施工方法、並びに圧密支持部材について説明する。ここで、本実施形態は、住宅などの建物を軟弱地盤や、埋土、盛土の造成地に構築する場合であっても不同沈下が発生することを効果的に抑止（防止）できる基礎構造及び基礎構造の施工方法、並びに圧密支持部材に関するものである。   Hereinafter, a foundation structure, a construction method for the foundation structure, and a consolidation support member according to an embodiment of the present invention will be described with reference to FIGS. Here, the present embodiment provides a foundation structure that can effectively suppress (prevent) the occurrence of uneven settlement even when building a building such as a house on soft ground, buried land, or embankment. The present invention relates to a foundation structure construction method and a consolidation support member.

本実施形態の基礎構造Ａは、図１に示すように、地表Ｇ１から所定の深さまで掘削形成された掘削孔１の底部１ａから下方に貫入して地盤Ｇ中に配設された圧密支持部材２と、圧密支持部材２を地盤Ｇに貫入しつつ下方に押圧することによって掘削孔１の底部１ａから下方の所定の深さの地盤Ｇ中に圧密形成される断面楕円形状（略球形）の圧密部３と、掘削孔１の底部１ａ側に割栗石４ａや捨コン４ｂなどを充填（挿入）してなる安定化層４と、掘削孔１の安定化層４の上に根入れ部５ａを設けつつ地表Ｇ１上に形成されるベタ基礎などの基礎本体５とを備えて構成されている。   As shown in FIG. 1, the foundation structure A of the present embodiment is a compact support member that is disposed in the ground G by penetrating downward from the bottom 1 a of the excavation hole 1 excavated from the ground surface G 1 to a predetermined depth. 2 and an oval cross-sectional shape (substantially spherical) formed in the ground G at a predetermined depth below the bottom 1a of the excavation hole 1 by pressing the consolidation support member 2 downward while penetrating the ground G. The consolidation portion 3, the stabilization layer 4 formed by filling (inserting) the cracked stone 4 a and the discarding 4 b on the bottom 1 a side of the excavation hole 1, and the root portion 5 a on the stabilization layer 4 of the excavation hole 1. And a foundation main body 5 such as a solid foundation formed on the ground surface G1.

圧密支持部材２は、例えば、図１、図２から図４、図５から図９に示すように、軸線Ｏ１を上下方向Ｔ１に向けて延設された鋼管からなる貫入部２ａと、貫入部２ａと互いの軸線Ｏ１を一致させて一体に設けられ、貫入部２ａの上端部側から横方向Ｔ２に突出して配設された円盤状の補強部２ｂと、円盤状に形成され、下端側から中央の挿入孔２ｃに貫入部２ａを挿入し、補強部２ｂと重なるように配設される受圧部２ｄと、貫入部２ａの補強部２ｂよりも上方に延出した部分で形成されるジョイント部（接続部）２ｅと、ジョイント部２ｅに接続され、圧密支持部材２に荷重を裁荷するための載荷アタッチメント部２ｆとを備えて形成されている。   For example, as shown in FIGS. 1, 2 to 4, and FIGS. 5 to 9, the compaction support member 2 includes a penetration portion 2 a made of a steel pipe having an axis O <b> 1 extending in the vertical direction T <b> 1 and a penetration portion. 2a and the axis O1 are aligned with each other, are integrally formed, and are formed in a disk-like reinforcing part 2b that protrudes in the lateral direction T2 from the upper end part side of the penetration part 2a, and is formed in a disk shape. A joint portion formed by inserting the penetration portion 2a into the central insertion hole 2c and being arranged so as to overlap the reinforcement portion 2b and a portion extending above the reinforcement portion 2b of the penetration portion 2a. (Connecting portion) 2e and a loading attachment portion 2f that is connected to the joint portion 2e and for discharging a load to the consolidation supporting member 2 are formed.

載荷アタッチメント部２ｆは、内径がジョイント部２ｅの外径よりも僅かに大きい円筒状（管状）の嵌合部２ｇと、嵌合部２ｇの外面から軸線Ｏ１中心の径方向に外側に突出したリブ（加圧部）２ｈとを備えて構成されている。また、リブ２ｈは、嵌合部２ｇから径方向外側に向かうに従い漸次下方に傾斜して形成され、軸線Ｏ１中心の周方向に所定の間隔をあけて複数設けられている。各リブ２ｈは、径方向外側に突出した先端部の径方向の位置が受圧部２ｄの外周縁と略一致するように形成されている。そして、このように形成した載荷アタッチメント部２ｆは、嵌合部２ｇの下方からその内孔にジョイント部２ｅを挿通してジョイント部２ｅと一体に配設される。   The loading attachment portion 2f includes a cylindrical (tubular) fitting portion 2g whose inner diameter is slightly larger than the outer diameter of the joint portion 2e, and a rib protruding outward in the radial direction about the axis O1 from the outer surface of the fitting portion 2g. (Pressurizing unit) 2h. Further, the ribs 2h are formed so as to be gradually inclined downward from the fitting portion 2g toward the outer side in the radial direction, and a plurality of ribs 2h are provided at predetermined intervals in the circumferential direction around the center of the axis O1. Each rib 2h is formed such that the radial position of the tip portion protruding radially outward substantially coincides with the outer peripheral edge of the pressure receiving portion 2d. And the loading attachment part 2f formed in this way is penetrated by the joint part 2e from the downward direction of the fitting part 2g to the inner hole, and is arrange | positioned integrally with the joint part 2e.

さらに、本実施形態の載荷アタッチメント部２ｆは、各リブ２ｈの下端に、補強部２ｂが係合する係合凹部２ｉが形成されている。これにより、載荷アタッチメント部２ｆをジョイント部２ｅに嵌合させて取り付けるとともに補強部２ｂが係合凹部２ｉに係合し、各リブ２ｈの係合凹部２ｉよりも径方向先端部側の下端が補強部２ｂの下面と軸線Ｏ１方向の略同位置に配設される。すなわち、各リブ２ｈの先端部側が補強部２ｂの下方に重ねて配設された受圧部２ｄの上面に当接する。   Furthermore, the loading attachment part 2f of this embodiment is formed with an engaging recess 2i that engages the reinforcing part 2b at the lower end of each rib 2h. As a result, the loading attachment portion 2f is fitted and attached to the joint portion 2e, and the reinforcement portion 2b is engaged with the engagement recess portion 2i, and the lower end of each rib 2h on the distal end side in the radial direction is reinforced. The lower surface of the portion 2b is disposed at substantially the same position in the direction of the axis O1. That is, the tip end side of each rib 2h abuts on the upper surface of the pressure receiving portion 2d disposed so as to overlap the lower portion of the reinforcing portion 2b.

次に、本実施形態の基礎構造Ａの施工方法について説明する。   Next, the construction method of the foundation structure A of this embodiment is demonstrated.

本実施形態の基礎構造Ａの施工方法では、はじめに、例えば、図１０に示すように、小型の杭打機（掘削機）などの建設機械６を用い、地盤Ｇの所定位置に地表Ｇ１から所定の深さの掘削孔１を穿設する（掘削孔形成工程）。   In the construction method of the foundation structure A of the present embodiment, first, as shown in FIG. 10, for example, a construction machine 6 such as a small pile driving machine (excavator) is used, and a predetermined position of the ground G is determined from the ground surface G1. A drilling hole 1 having a depth of 5 is drilled (a drilling hole forming step).

本実施形態では、リーダー７に進退自在に支持された掘削機構（スライダ）８に進退方向に軸線Ｏ１方向を向けてロッド９を接続し、このロッド９の先端に取り付けた略円盤状で螺旋状の掘削ビット（オーガー）１０を、掘削機構８を上下方向Ｔ１に進退させつつ地盤Ｇに切り込ませ、所定深さの掘削孔１を形成してゆく。   In the present embodiment, a rod 9 is connected to an excavating mechanism (slider) 8 supported by the leader 7 so as to be able to advance and retreat, and the axis O1 is directed in the advancing and retreating direction. The excavation bit (auger) 10 is cut into the ground G while the excavation mechanism 8 is advanced and retracted in the vertical direction T1, and the excavation hole 1 having a predetermined depth is formed.

所定深さの掘削孔１を形成した段階で、図１１に示すように、建設機械６の掘削機構８に接続された掘削ビット１０（及びロッド９）を取り外し、掘削機構８（ロッド９）に圧密支持部材２を接続して取り付ける。   When the excavation hole 1 having a predetermined depth is formed, the excavation bit 10 (and the rod 9) connected to the excavation mechanism 8 of the construction machine 6 is removed as shown in FIG. 11, and the excavation mechanism 8 (rod 9) is attached. The consolidation support member 2 is connected and attached.

そして、掘削機構８を下方に進出させ、圧密支持部材２を掘削孔１に挿入するとともに、貫入部２ａを掘削孔１の底部１ａから地盤Ｇに貫入させる（圧密支持部材設置工程）。さらに、受圧部２ｂが掘削孔１の底部１ａに当接するまで順次貫入部２ａを地盤Ｇ中に貫入させる。   Then, the excavation mechanism 8 is moved downward to insert the consolidation support member 2 into the excavation hole 1 and to penetrate the penetration portion 2a from the bottom 1a of the excavation hole 1 into the ground G (consolidation support member installation step). Furthermore, the penetration part 2a is sequentially penetrated into the ground G until the pressure receiving part 2b contacts the bottom part 1a of the excavation hole 1.

図１２に示すように、掘削孔１の底部１ａ上の受圧部２ｄに補強部２ｂが当接した後、圧密支持部材２をさらに下方に進出させて受圧部２ｄに載荷する。このとき、載荷アタッチメント部２ｆの各リブ２ｈを通じて受圧部２ｄに好適に荷重が載荷される。   As shown in FIG. 12, after the reinforcing portion 2b comes into contact with the pressure receiving portion 2d on the bottom portion 1a of the excavation hole 1, the compaction support member 2 is further advanced downward to be loaded on the pressure receiving portion 2d. At this time, a load is suitably loaded on the pressure receiving portion 2d through each rib 2h of the loading attachment portion 2f.

これにより、受圧部２ｄから地盤Ｇが下方に加圧されて圧密し、受圧部２ｄの下方の地盤Ｇ中に圧密部３が形成される。なお、本実施形態では、所定の荷重を裁荷し続け、受圧部２ｄ（圧密支持部材２）の沈下がなくなった段階（あるいは沈下量が小さくなった段階で）載荷を終了する。   As a result, the ground G is pressurized downward from the pressure receiving portion 2d to be consolidated, and the consolidated portion 3 is formed in the ground G below the pressure receiving portion 2d. In the present embodiment, the predetermined load is continued to be unloaded, and the loading is completed when the pressure receiving portion 2d (consolidation support member 2) has stopped sinking (or when the sinking amount has decreased).

圧密部３は、受圧部２ｄひいては掘削孔１の底部１ａから下方の所定の深さまで、貫入部２ａの軸線Ｏ１を略中心とした断面楕円状に形成される。また、本実施形態では、圧密部３が形成されるとともに、圧密部３の地盤Ｇが鋼管である貫入部２ａの外周面に強固に密着することになる。   The compacted portion 3 is formed in an elliptical cross section with the axis O1 of the penetrating portion 2a as a substantial center from the pressure receiving portion 2d and thus from the bottom 1a of the excavation hole 1 to a predetermined depth below. Moreover, in this embodiment, while the compaction part 3 is formed, the ground G of the compaction part 3 will closely_contact | adhere to the outer peripheral surface of the penetration part 2a which is a steel pipe.

このように圧密支持部材２を地盤Ｇに加圧して圧密部３を形成した段階で、圧密支持部材２の載荷アタッチメント部２ｆから掘削機構８を切り離す。なお、載荷アタッチメント部２ｆをジョイント部２ｅから取り外して回収してもよい。   The excavation mechanism 8 is separated from the loading attachment portion 2 f of the consolidation support member 2 at the stage where the consolidation portion 3 is formed by pressurizing the consolidation support member 2 to the ground G in this way. The loading attachment portion 2f may be removed from the joint portion 2e and collected.

そして、図１に示すように、掘削孔１内の所定のレベルまで割栗石４ａや捨コン４ｂを充填して安定化層４を形成する。この安定化層４によってレベルを調整することができる。これとともに、型枠を設置し、安定化層４の上や地表Ｇ１に基礎コンクリートを打設する（基礎本体形成工程）。   Then, as shown in FIG. 1, the stabilization layer 4 is formed by filling the cracked stone 4 a and the discarding 4 b to a predetermined level in the excavation hole 1. The level can be adjusted by the stabilizing layer 4. At the same time, a formwork is installed and foundation concrete is placed on the stabilization layer 4 or on the ground surface G1 (foundation process of foundation body).

所定の養生を行った段階で型枠を脱型し、圧密支持部材２及び圧密部３上に根入れ部５ａを配した基礎本体５を形成する。このようにして本実施形態の基礎構造Ａを構築することができる。   The mold body is removed from the mold at a stage where the predetermined curing is performed, and the base body 5 is formed in which the rooting portion 5a is disposed on the compaction support member 2 and the compaction portion 3. In this way, the basic structure A of the present embodiment can be constructed.

上記構成からなる本実施形態の基礎構造Ａ及び圧密支持部材２においては、掘削孔１の底部１ａから下方の所定の深さまでの地盤Ｇが圧密されて略球状の圧密部３が形成されている。これにより、基礎本体５の下方の地盤Ｇをある程度の深度まで予め圧密した状態にすることができる。また、基礎本体５ひいては住宅などの建屋／建物本体の荷重が圧密部３でしっかりと受け止め、支持することができる。   In the foundation structure A and the consolidation support member 2 of the present embodiment having the above-described configuration, the ground G from the bottom 1a of the excavation hole 1 to a predetermined depth below is consolidated to form a substantially spherical consolidation section 3. . Thereby, the ground G under the base main body 5 can be made into the state compacted previously to a certain depth. Further, the load of the foundation main body 5 and the building / building main body such as a house can be firmly received and supported by the consolidated portion 3.

また、本実施形態の基礎構造Ａの施工方法及び圧密支持部材２においては、地盤Ｇに掘削孔１を掘削形成し、圧密支持部材２を地盤Ｇ中に貫入させつつ地盤Ｇに押圧することで、容易に圧密部３を形成することができる。   Moreover, in the construction method of the basic structure A and the consolidation support member 2 of the present embodiment, the excavation hole 1 is excavated and formed in the ground G, and the consolidation support member 2 is pressed into the ground G while penetrating into the ground G. The consolidated part 3 can be easily formed.

よって、本実施形態の基礎構造Ａ及び基礎構造Ａの施工方法、並びに圧密支持部材２によれば、従来と比較し、より効率的且つ効果的に建物の不同沈下を防止（抑止）することが可能になる。   Therefore, according to the foundation structure A of this embodiment, the construction method of the foundation structure A, and the consolidation support member 2, it is possible to prevent (suppress) the uneven settlement of the building more efficiently and effectively than in the past. It becomes possible.

さらに、本実施形態の基礎構造Ａ及び基礎構造Ａの施工方法、並びに圧密支持部材２においては、地盤Ｇ中に圧密支持部材２の貫入部２ａが貫入されていることで、貫入部２ａと地盤Ｇとの間に摩擦力を発生させることができる。これにより、貫入部２ａと地盤Ｇとの間の摩擦抵抗によって基礎本体５ひいては建物の荷重を受けることができ、より確実に建物の不同沈下の発生を防ぐことが可能になる。   Furthermore, in the foundation structure A of this embodiment, the construction method of the foundation structure A, and the consolidation support member 2, the penetration portion 2a and the ground are formed by the penetration portion 2a of the consolidation support member 2 being penetrated into the ground G. A frictional force can be generated between G and G. Thereby, the foundation main body 5 and the load of the building can be received by the frictional resistance between the penetration part 2a and the ground G, and it becomes possible to prevent the occurrence of the uneven settlement of the building more reliably.

また、本実施形態の基礎構造Ａ及び基礎構造Ａの施工方法、並びに圧密支持部材２においては、横方向Ｔ２に突出する円盤状の受圧部２ｄを貫入部２ａと接続して圧密支持部材２が形成され、この圧密支持部材２の受圧部２ｄが掘削孔１の底部１ａに面接触するように配設される。これにより、貫入部２ａを地盤Ｇに貫入させるとともに受圧部２ｄに所定の荷重を裁荷することにより、容易に掘削孔１の底部１ａから所定の深さまで圧密部３を形成することができる。さらに、円盤状の受圧部２ｄの上に基礎本体５を構築するため、受圧部２ｄを抵抗にすることができ、且つ受圧部２ｄによって受圧面積を大きくすることができる。よって、この受圧部２ｄで基礎本体５ひいては建物の荷重を受けることができ、さらに確実に建物の不同沈下の発生を防ぐことが可能になる。   Further, in the foundation structure A and the construction method of the foundation structure A and the compaction support member 2 of the present embodiment, the compact support member 2 is formed by connecting the disc-shaped pressure receiving part 2d protruding in the lateral direction T2 with the penetration part 2a. The pressure receiving portion 2 d of the compaction support member 2 is formed so as to be in surface contact with the bottom portion 1 a of the excavation hole 1. Thereby, the consolidation part 3 can be easily formed from the bottom part 1a of the excavation hole 1 to a predetermined depth by allowing the penetration part 2a to penetrate the ground G and receiving a predetermined load on the pressure receiving part 2d. Furthermore, since the foundation body 5 is constructed on the disk-shaped pressure receiving part 2d, the pressure receiving part 2d can be made into a resistor, and the pressure receiving area can be increased by the pressure receiving part 2d. Therefore, the pressure receiving portion 2d can receive the foundation main body 5 and thus the building load, and more reliably prevent the occurrence of uneven settlement of the building.

また、受圧部２ｄに所定の荷重を裁荷して圧密部３を形成するとともに、貫入部２ａと地盤Ｇの付着力ひいては摩擦抵抗力を大きくすることができる。これにより、さらに効果的に受圧部２ｄで基礎本体５ひいては建物の荷重を受けることができ、建物の不同沈下の発生を防ぐことが可能になる。   In addition, a predetermined load is applied to the pressure receiving portion 2d to form the consolidated portion 3, and the adhesion between the penetration portion 2a and the ground G, and thus the frictional resistance, can be increased. As a result, the pressure receiving portion 2d can receive the load on the foundation body 5 and thus the building more effectively, thereby preventing the occurrence of uneven settlement of the building.

以上、本発明に係る基礎構造及び基礎構造の施工方法、並びに圧密支持部材２の一実施形態について説明したが、本発明は上記の一実施形態に限定されるものではなく、その趣旨を逸脱しない範囲で適宜変更可能である。   As mentioned above, although one embodiment of the foundation structure which concerns on this invention, the construction method of a foundation structure, and the compaction support member 2 was demonstrated, this invention is not limited to said one embodiment, and does not deviate from the meaning. The range can be changed as appropriate.

例えば、本実施形態では、杭打機６を用いて掘削孔１を掘削形成し、この杭打機６を用いて圧密支持部材２を地盤Ｇに貫入するとともに押圧して圧密部３を形成するものとした。これに対し、掘削孔１は他の掘削手段を用いて形成してもよい。また、圧密支持部材２を地盤Ｇに貫入／押圧して圧密部３を形成する手段は、ジャッキなどを用いてもよく、特に限定を必要としない。   For example, in this embodiment, the excavation hole 1 is excavated using the pile driving machine 6, and the consolidation support member 2 is penetrated into the ground G and pressed using the pile driving machine 6 to form the consolidated portion 3. It was supposed to be. On the other hand, the excavation hole 1 may be formed using other excavation means. Further, the means for forming the consolidated portion 3 by penetrating / pressing the consolidated support member 2 into the ground G may use a jack or the like, and is not particularly limited.

さらに、本実施形態では、住宅などの建物の基礎構造を一例として説明を行ったが、本発明に係る基礎構造及び基礎構造の施工方法は、例えば橋脚やビルなどの他の構造物、建造物、あらゆる構造物、建造物に適用可能である。この場合においても、勿論、本実施形態と同様の作用効果を得ることができる。   Furthermore, in the present embodiment, the basic structure of a building such as a house has been described as an example. However, the basic structure and the construction method of the basic structure according to the present invention are other structures such as piers and buildings, and buildings, for example. Applicable to all structures and buildings. Even in this case, it is needless to say that the same effect as the present embodiment can be obtained.

また、圧密支持部材２の貫入部２ａ、補強部２ｂ、受圧部２ｄ、ジョイント部２ｅ、載荷アタッチメント部２ｆの形状、構成を特に本実施形態のように限定する必要もない。   In addition, the shape and configuration of the penetration part 2a, the reinforcement part 2b, the pressure receiving part 2d, the joint part 2e, and the loading attachment part 2f of the compaction support member 2 do not have to be particularly limited as in this embodiment.

また、受圧部２ｄや補強部２ｂ、ジョイント部２ｅは貫入部２ａと一体であっても別体であっても構わない。   Further, the pressure receiving portion 2d, the reinforcing portion 2b, and the joint portion 2e may be integrated with the penetration portion 2a or may be separate.

１ 掘削孔
１ａ 底部
２ 圧密支持部材
２ａ 貫入部
２ｂ 補強部
２ｃ 挿入孔
２ｄ 受圧部
２ｅ ジョイント部
２ｆ 載荷アタッチメント部
２ｇ 嵌合部
２ｈ リブ
２ｉ 係合凹部
３ 圧密部
４ 安定化層
４ａ 割栗石
４ｂ 捨コン
５ 基礎本体
５ａ 根入れ部
６ 建設機械（杭打機）
７ リーダー
８ 掘削機構
９ ロッド
１０ 掘削ビット
Ａ 基礎構造
Ｇ 地盤
Ｇ１ 地表
Ｏ１ 軸線
Ｔ１ 上下方向
Ｔ２ 横方向 DESCRIPTION OF SYMBOLS 1 Excavation hole 1a Bottom part 2 Consolidation support member 2a Penetration part 2b Reinforcement part 2c Insertion hole 2d Pressure receiving part 2e Joint part 2f Loading attachment part 2g Fitting part 2h Rib 2i Engagement recessed part 3 Consolidation part 4 Stabilization layer 4a Cracking stone 4b Con 5 Basic body 5a Rooting part 6 Construction machine (pile driver)
7 Leader 8 Excavation mechanism 9 Rod 10 Excavation bit A Foundation structure G Ground G1 Ground surface O1 Axis T1 Vertical direction T2 Horizontal direction

Claims (5)

地盤を掘削して形成した掘削孔の底部から下方に貫入して配設される圧密支持部材と、
前記圧密支持部材を地盤に貫入しつつ前記掘削孔の底部から下方の地盤を押圧し、地盤に圧密形成される圧密部と、
前記圧密支持部材の上に基礎コンクリートを打設して形成される基礎本体とを備え、
且つ、前記圧密支持部材が、前記地盤に貫入する貫入部と、前記貫入部に取り付けて設けられるとともに横方向に延設されて前記掘削孔の底部に当接する受圧部とを備えて構成されていることを特徴とする基礎構造。 A consolidation support member disposed by penetrating downward from the bottom of the excavation hole formed by excavating the ground;
Pressing the ground below from the bottom of the excavation hole while penetrating the compaction supporting member into the ground, and a compacted part that is compacted to the ground; and
A foundation body formed by placing foundation concrete on the compaction support member,
The consolidation support member includes a penetration portion that penetrates into the ground, and a pressure receiving portion that is attached to the penetration portion and extends in the lateral direction to contact the bottom of the excavation hole. A basic structure characterized by 地盤を掘削して掘削孔を形成する掘削孔形成工程と、
地盤に貫入する貫入部、及び前記貫入部に取り付けられるとともに横方向に延設された受圧部を備えてなる圧密支持部材を前記掘削孔に挿入し、前記掘削孔の底部から地盤に貫入部を貫入し、且つ前記受圧部で前記掘削孔の底部を押圧し、前記掘削孔の底部から下方の地盤を圧密させて圧密部を形成する圧密支持部材設置工程と、
前記圧密支持部材の上方に基礎コンクリートを打設して基礎本体を形成する基礎本体形成工程とを備えることを特徴とする基礎構造の施工方法。 Excavation hole forming process of excavating the ground to form an excavation hole,
A consolidation support member comprising a penetration portion penetrating into the ground and a pressure receiving portion attached to the penetration portion and extending in the lateral direction is inserted into the excavation hole, and the penetration portion is inserted into the ground from the bottom of the excavation hole. A consolidation support member installation step for penetrating and pressing the bottom of the excavation hole with the pressure receiving portion to consolidate a lower ground from the bottom of the excavation hole; and
A foundation construction method comprising: a foundation body forming step of forming foundation foundation by placing foundation concrete above the consolidation support member. 上方に基礎コンクリートを打設して形成される基礎本体を支持するための圧密支持部材であって、
地盤に貫入する貫入部と、
前記貫入部に取り付けて、前記貫入部から横方向に延設される受圧部とを備えて構成されていることを特徴とする圧密支持部材。 A consolidation support member for supporting a foundation body formed by placing foundation concrete above,
An intrusion part that penetrates the ground,
A compaction support member comprising: a pressure receiving portion attached to the penetration portion and extending laterally from the penetration portion. 前記貫入部が、棒状に形成されるとともに、上端部側に軸線中心の径方向の横方向に延出する板状の補強部を一体に備えて形成され、且つ前記受圧部が中央に挿通孔を備えて環状に形成され、
前記挿通孔に前記貫入部を挿通し、前記受圧部が前記補強部に当接して配設されている請求項３記載の圧密支持部材。 The penetration portion is formed in a rod shape, and is integrally provided with a plate-like reinforcing portion extending in the radial direction about the axis on the upper end portion side, and the pressure receiving portion is inserted in the center in the insertion hole. Formed in an annular shape,
The consolidation support member according to claim 3, wherein the penetration portion is inserted into the insertion hole, and the pressure receiving portion is disposed in contact with the reinforcing portion. 棒状の前記貫入部の前記補強部よりも上方がジョイント部とされるとともに、前記ジョイント部に取り付けられる載荷アタッチメント部を備えており、
前記載荷アタッチメント部が、前記ジョイント部を挿通して嵌合させる内孔を備えた筒状の嵌合部と、前記嵌合部の外面から前記軸線中心の径方向外側に突出し、前記ジョイント部に取り付けた状態で前記受圧部に当接する加圧部とを備えて構成されている請求項４記載の圧密支持部材。 The upper part of the bar-shaped penetration part is a joint part and includes a loading attachment part attached to the joint part,
The load attachment portion described above protrudes from the outer surface of the fitting portion to the outside in the radial direction of the axial center from the outer surface of the fitting portion, and is inserted into the joint portion. The consolidation support member according to claim 4, further comprising a pressurizing part that contacts the pressure receiving part in an attached state.

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