JP5520156B2

JP5520156B2 - Temporary receiving structure of structure and temporary receiving method

Info

Publication number: JP5520156B2
Application number: JP2010165750A
Authority: JP
Inventors: 純一日比; 克敏豊島
Original assignee: Kajima Corp
Current assignee: Kajima Corp
Priority date: 2010-07-23
Filing date: 2010-07-23
Publication date: 2014-06-11
Anticipated expiration: 2030-07-23
Also published as: JP2012026161A

Description

本発明は、土木・建築工事において建物を含む構造物のレベル調整、免震レトロフィットなどのために構造物の荷重を仮受けする構造物の仮受け構造及び仮受け方法に関する。 The present invention relates to a temporary receiving structure and a temporary receiving method for a structure that temporarily receives a load of the structure for level adjustment of a structure including a building, seismic isolation retrofit, and the like in civil engineering / building work.

例えば特許文献１では、地盤中に打設された既存杭と、該既存杭により支持された基礎構造物と、該基礎構造物上に支持された構造物本体からなる構造物であって、前記既存杭が損壊した状態の構造物を修復する際に、前記構造物本体の下方の地盤に支持杭を打設構築し、前記地盤を掘削して、前記基礎構造物の下方に掘削空間を形成する形で、該基礎構造物を露出させると共に、前記基礎構造物を、所定の仮受け支持手段（油圧ジャッキ）を介して、前記支持杭に仮受け支持させ、その状態で前記構造物に対する修復作業を行うようにしている。 For example, in Patent Document 1, an existing pile placed in the ground, a foundation structure supported by the existing pile, and a structure body composed of a structure body supported on the foundation structure, When repairing a structure in which an existing pile is damaged, a support pile is placed on the ground below the structure body, and the ground is excavated to form a drilling space below the foundation structure. In this form, the foundation structure is exposed, and the foundation structure is temporarily supported by the support pile via a predetermined provisional support means (hydraulic jack), and the structure is repaired in that state. I do work.

このように、従来の構造物の仮受け（アンダーピーニング）は、仮受け用の支持杭と構造物との間に油圧ジャッキを設置し、油圧を働かせることで、構造物に不要な沈下をさせることなく、その荷重を支持杭に移行している。この際、ロック機構付きの専用油圧ジャッキを使用する。 As described above, conventional temporary receiving (underpeening) of a structure causes unnecessary subsidence to the structure by installing a hydraulic jack between the support pile for temporary receiving and the structure and applying hydraulic pressure. Without shifting the load to the support pile. At this time, a dedicated hydraulic jack with a locking mechanism is used.

特開平０９−１４４０４９号公報Japanese Patent Application Laid-Open No. 09-144049

しかしながら、従来技術では、仮受け期間中は油圧ジャッキを設置したままとなり、設置期間中、油圧ジャッキの使用によるコストが発生し、しかも仮受け箇所の数、油圧ジャッキが必要であることから、そのコストは膨大なものとなる。また、長期間使用するため安全性の観点からロック機構付きの高価な仮受け専用ジャッキが必要である。
また、油圧ジャッキで一時的に仮受けした後、その状態で構造物と支持杭との間を固定して、油圧ジャッキを撤去することも考えられるが、このようにすると、その後のレベル調整などができなくなる。 However, in the prior art, the hydraulic jack remains installed during the temporary receiving period, and there is a cost due to the use of the hydraulic jack during the installation period, and the number of temporary receiving positions and the hydraulic jack are required. The cost is enormous. Further, since it is used for a long time, an expensive temporary receiving jack with a lock mechanism is necessary from the viewpoint of safety.
In addition, after temporarily receiving with a hydraulic jack, it may be possible to fix the structure and the support pile in that state and remove the hydraulic jack. Can not be.

また、仮受け期間中に地震の水平力に対しても抵抗できるシステムにすることも求められている。
本発明は、このような実状に鑑み、油圧ジャッキの撤去が可能でありながら、その後のレベル調整が可能で、仮受け期間中の地震の水平力に対しても抵抗できる、構造物の仮受け構造、及び、仮受け方法を提供することを課題とする。 There is also a need for a system that can resist the horizontal forces of earthquakes during the provisional period.
In view of such a situation, the present invention is able to remove the hydraulic jack, but can adjust the level thereafter, and can resist the horizontal force of the earthquake during the temporary receiving period. It is an object to provide a structure and a provisional receiving method.

上記の課題を解決するために、本発明に係る構造物の仮受け構造は、構造物下方の地盤中に構築された仮受け用の支持部材と、前記構造物と前記支持部材との対向面のうちいずれか一方の対向面に固定され、凸部を有する第１のプレートと、他方の対向面に固定され、前記凸部を水平方向に拘束する凹部を有する第２のプレートと、前記第１のプレートと前記第２のプレートとの間に打ち込まれるくさび部材と、を含んで構成される。前記第２のプレートは、前記凸部を水平方向から挟み込むように、前記凹部を通る分割線で複数に分割されている。 In order to solve the above-described problems, a temporary receiving structure for a structure according to the present invention includes a support member for temporary reception constructed in the ground below the structure, and an opposing surface of the structure and the support member. A first plate having a convex portion fixed to one of the opposing surfaces, a second plate having a concave portion fixed to the other opposing surface and restraining the convex portion in the horizontal direction, and the first plate And a wedge member that is driven between the first plate and the second plate. The second plate is divided into a plurality of dividing lines passing through the concave portions so as to sandwich the convex portions from the horizontal direction.

ここで、前記支持部材は、前記構造物の荷重を一時的に仮受けする油圧ジャッキを設置可能なジャッキ設置部を有し、前記くさび部材は、前記ジャッキ設置部に設置された前記油圧ジャッキの伸長状態にて打ち込まれる。
また、本発明に係る構造物の仮受け方法は、構造物下方の地盤中に仮受け用の支持部材を構築し、前記構造物と前記支持部材との対向面のうちいずれか一方の対向面に凸部を有する第１のプレートを固定し、他方の対向面に前記凸部を水平方向に拘束する凹部を有する第２のプレートを固定する。そして、前記支持部材と前記構造物との間に油圧ジャッキを設置して伸長させることにより構造物の荷重を一時的に仮受けした後、前記第１のプレートと前記第２のプレートとの間にくさび部材を打ち込んで、前記油圧ジャッキを撤去する。 Here, the support member has a jack installation portion on which a hydraulic jack that temporarily receives the load of the structure can be installed, and the wedge member is formed of the hydraulic jack installed on the jack installation portion. It is driven in the extended state.
Further, in the temporary receiving method for a structure according to the present invention, a support member for temporary reception is constructed in the ground below the structure, and one of the opposing surfaces of the structure and the supporting member is opposed to the opposing surface. A first plate having a convex portion is fixed to a second plate, and a second plate having a concave portion that restrains the convex portion in a horizontal direction is fixed to the other facing surface. And after temporarily receiving the load of a structure temporarily by installing and extending | stretching the hydraulic jack between the said supporting member and the said structure, between the said 1st plate and the said 2nd plate A wedge member is driven in and the hydraulic jack is removed.

本発明によれば、くさび部材の打ち込みが終われば油圧ジャッキは撤去できるので、仮受け用専用ジャッキを設置したままにする場合に比べ、低コストとなる。特に、仮受け箇所が多数ある場合や、仮受け期間が長い場合に有利である。また、油圧ジャッキの使用は一時的であり、仮受け専用の特殊なジャッキではなく、一般のものでよい。また、仮受け期間中は、油圧ジャッキで荷重を負担する必要がないので、ジャッキの破損、不具合による沈下の心配がない。 According to the present invention, since the hydraulic jack can be removed after the driving of the wedge member is completed, the cost is lower than the case where the temporary receiving dedicated jack is left installed. In particular, it is advantageous when there are a large number of provisional receiving locations or when the provisional receiving period is long. The use of the hydraulic jack is temporary, and may be a general jack, not a special jack dedicated to temporary receiving. Further, during the provisional receiving period, it is not necessary to bear the load with the hydraulic jack, so there is no fear of the jack being damaged or settling due to a malfunction.

その一方、くさび部材を用いて仮受けすることで、構造物を上昇させる方向には固定されていないので、くさび部材の打ち込みにより、いつでもレベル調整が可能である。
また、凸部（せん断キー）と凹部（拘束部材）との嵌め合いにより、地震時の水平力に対して抵抗でき、仮受け中も構造物の耐震性を保つことができる。 On the other hand, the provisional reception using the wedge member is not fixed in the direction in which the structure is raised, so that the level can be adjusted at any time by driving the wedge member.
Further, the fitting between the convex part (shear key) and the concave part (restraining member) can resist the horizontal force at the time of the earthquake, and the seismic resistance of the structure can be maintained even during temporary reception.

本発明の一実施形態を示す仮受け方法（ステップ１）の説明図Explanatory drawing of the provisional receiving method (step 1) which shows one Embodiment of this invention 仮受け方法（ステップ２）の説明図Explanatory drawing of the provisional receiving method (Step 2) 仮受け方法（ステップ３）の説明図Explanatory drawing of the provisional receiving method (step 3) 仮受け方法（ステップ４）の説明図Explanatory drawing of the provisional receiving method (step 4) 仮受け方法（ステップ５）の説明図Explanatory drawing of the provisional receiving method (step 5) 仮受け方法（ステップ６）の説明図Explanatory drawing of the provisional receiving method (step 6) 仮受け方法（ステップ７）の説明図Explanatory drawing of the provisional receiving method (step 7) 仮受け構造の斜視分解図Perspective exploded view of temporary support structure 本発明の他の実施形態を示す仮受け構造の説明図Explanatory drawing of the temporary support structure which shows other embodiment of this invention. 仮受け工事の具体的適用例（ステップ１）の説明図Explanatory drawing of specific application example (step 1) of temporary construction 仮受け工事の具体的適用例（ステップ２）の説明図Illustration of specific application example (step 2) of temporary construction 仮受け工事の具体的適用例（ステップ３）の説明図Illustration of specific application example (step 3) of temporary construction 仮受け工事の具体的適用例（ステップ４）の説明図Illustration of specific application example (step 4) of temporary construction 受け替えのイメージ図Image of exchange

以下、本発明の実施の形態について、詳細に説明する。
図１〜図７は本発明の一実施形態を示す仮受け方法の説明図であり、それぞれステップ１〜７を示している。また、図８は仮受け構造の斜視分解図である。
図１〜図７中に示される構造物１は、仮受け対象の既存の構造物、又は仮受け対象の既存の構造物に連接して形成した支持用の構造物であり、図示しない既存の支持部材（既存杭）により直接的又は間接的に支持されている。 Hereinafter, embodiments of the present invention will be described in detail.
FIGS. 1-7 is explanatory drawing of the provisional receiving method which shows one Embodiment of this invention, and has shown step 1-7, respectively. FIG. 8 is an exploded perspective view of the temporary support structure.
The structure 1 shown in FIG. 1 to FIG. 7 is an existing structure to be temporarily received, or a support structure formed in connection with the existing structure to be temporarily received, and an existing structure (not shown) It is supported directly or indirectly by a support member (existing pile).

上記構造物１の仮受けのため、図１〜図７中に示されているように、構造物１下方の地盤中に仮受け用の支持部材２が予め構築される。ここでは、図８に示されているように、仮受け用の支持部材２はＨ形鋼により構成され、その上端にトッププレート２ａが溶接固定されている。
上記構造物１の荷重を上記支持部材２に仮受けする方法について、図１〜図７の各ステップごとに説明する。 For temporary reception of the structure 1, as shown in FIGS. 1 to 7, a support member 2 for temporary reception is built in advance in the ground below the structure 1. Here, as shown in FIG. 8, the support member 2 for temporary reception is made of H-shaped steel, and a top plate 2a is welded and fixed to the upper end thereof.
A method of temporarily receiving the load of the structure 1 on the support member 2 will be described for each step of FIGS.

図１のステップ１では、支持部材２のトッププレート２ａ上方の、仮受け対象の構造物１の下面に、下向きの凸部３を有する第１のプレート（アンカープレート）４を図示しないボルトにより固定する。この第１のプレート４は、略矩形の鉄板の中央に凸部３として円柱状の鉄材を溶接固定したもので、この凸部３はせん断キーとして機能する。尚、凸部３は断面円形であるとよいが、角形等であってもよい。 In step 1 of FIG. 1, a first plate (anchor plate) 4 having a downward projecting portion 3 is fixed to a lower surface of a structure 1 to be temporarily received above a top plate 2 a of a support member 2 with a bolt (not shown). To do. The first plate 4 is formed by welding and fixing a cylindrical iron material as a convex portion 3 at the center of a substantially rectangular iron plate, and the convex portion 3 functions as a shear key. In addition, although the convex part 3 is good in a cross-sectional circle shape, a square etc. may be sufficient.

図２のステップ２では、支持部材２のトッププレート２ａの上面に、前記凸部３を水平方向に拘束する凹部５を有する第２のプレート（下くさび）６Ａ、６Ｂを溶接により固定する。
この第２のプレート６Ａ、６Ｂは、図８に示されているように、前記凸部３を水平方向から挟み込むように、凹部５を通る分割線で２つに分割されており、したがって、各分割体には、合わせ面側に前記凹部５を形成するための切欠きが形成されている。尚、凸部３の径に比べ、凹部５の径をやや大きくして、凸部３と凹部５との嵌め合いに遊びを持たせる。 In step 2 of FIG. 2, second plates (lower wedges) 6 A and 6 B having concave portions 5 that restrain the convex portions 3 in the horizontal direction are fixed to the upper surface of the top plate 2 a of the support member 2 by welding.
As shown in FIG. 8, the second plates 6 A and 6 B are divided into two by a dividing line passing through the concave portion 5 so as to sandwich the convex portion 3 from the horizontal direction. The split body is formed with a notch for forming the recess 5 on the mating surface side. It should be noted that the diameter of the concave portion 5 is made slightly larger than the diameter of the convex portion 3 so that the fitting between the convex portion 3 and the concave portion 5 has play.

また、この第２のプレート６Ａ、６Ｂは、図８に示されているように、合わせ面側（内側）が厚く、合わせ面と反対側（外側）が薄い形状をなしている。従って、この第２のプレート６Ａ、６Ｂは、後述するくさび部材９Ａ、９Ｂの打ち込み方向で見て、打ち込み方向入口側が薄く、打ち込み方向奥側が厚い、逆くさび形状をなしている。それゆえ、本実施形態では、この第２のプレート６Ａ、６Ｂを「下くさび」といい、後述するくさび部材９Ａ、９Ｂを「上くさび」という。 Further, as shown in FIG. 8, the second plates 6 A and 6 B are formed such that the mating surface side (inner side) is thick and the opposite side (outer side) is thin. Therefore, the second plates 6A and 6B have a reverse wedge shape in which the inlet direction in the driving direction is thin and the back side in the driving direction is thick as viewed in the driving direction of the wedge members 9A and 9B described later. Therefore, in the present embodiment, the second plates 6A and 6B are referred to as “lower wedges”, and the wedge members 9A and 9B described later are referred to as “upper wedges”.

また、図２のステップ２では、支持部材２に油圧ジャッキ設置用のブラケット７を図示しないボルトにより固定する。このため、支持部材２には、油圧ジャッキを設置可能なジャッキ設置部として、少なくとも、ブラケット７をボルト固定するための取付孔を予め形成しておく。
このブラケット７は、図８に示されているように、支持部材２を構成するＨ形鋼の各フランジ部の内外にボルト固定した板材７ａ、７ｂの端部間にＴ形鋼をボルト固定して支持台７ｃを形成したもので、支持台７ｃは、２本ずつある板材７ａ、７ｂの両端部に設けられることで、計４個設けられる。従って、ブラケット７は、４個の油圧ジャッキを支持部材２から張り出して支持部材２を囲む位置（支持台７ｃ上）に設置可能である。尚、図１〜図７と、図８とでは、ブラケット７の取付方向に対する第２のプレート（下くさび）６Ａ、６Ｂの取付方向（後述するくさび部材９Ａ、９Ｂの打ち込み方向）が異なるが、図８が正しく、図１〜図７では後述する油圧ジャッキ８とくさび部材９Ａ、９Ｂとが重ならず良く見えるように９０°ずらしてある。 In step 2 of FIG. 2, the bracket 7 for installing the hydraulic jack is fixed to the support member 2 with a bolt (not shown). For this reason, at least a mounting hole for fixing the bracket 7 with a bolt is formed in the support member 2 in advance as a jack installation portion on which a hydraulic jack can be installed.
As shown in FIG. 8, the bracket 7 is formed by bolting T-shaped steel between end portions of plate members 7 a and 7 b bolted to the inside and outside of each flange portion of the H-shaped steel constituting the support member 2. The support base 7c is formed, and the support base 7c is provided at both ends of the two plate members 7a and 7b, so that a total of four support bases 7c are provided. Therefore, the bracket 7 can be installed at a position (on the support base 7 c) that projects the four hydraulic jacks from the support member 2 and surrounds the support member 2. 1 to 7 and FIG. 8 are different in the mounting direction of the second plates (lower wedges) 6A, 6B relative to the mounting direction of the bracket 7 (the driving direction of the wedge members 9A, 9B described later). FIG. 8 is correct, and in FIGS. 1 to 7, the hydraulic jack 8 (described later) and the wedge members 9 A and 9 B are shifted by 90 ° so that they can be seen well without overlapping.

図３のステップ３では、油圧ジャッキ設置用のブラケット７の各支持台７ｃ上に、油圧ジャッキ８を設置し、そのヘッド部を構造物１の下面に対向させる。
図４のステップ４では、油圧ジャッキ８をジャッキアップし、これによりプレロードを導入する。
図５のステップ５では、第１のプレート（アンカープレート）４と第２のプレート（下くさび）６Ａ、６Ｂとの間に、くさび部材（上くさび）９Ａ、９Ｂを、ハンマー等を用いて、打ち込む。 In step 3 of FIG. 3, the hydraulic jack 8 is installed on each support base 7 c of the bracket 7 for installing the hydraulic jack, and the head portion thereof is opposed to the lower surface of the structure 1.
In step 4 of FIG. 4, the hydraulic jack 8 is jacked up, thereby introducing a preload.
In Step 5 of FIG. 5, between the first plate (anchor plate) 4 and the second plates (lower wedges) 6A, 6B, wedge members (upper wedges) 9A, 9B are used with a hammer or the like. Type in.

くさび部材（上くさび）９Ａ、９Ｂは、第２のプレート（下くさび）６Ａ、６Ｂと同様、２つに分割されており、したがって、各分割体は、第１のプレート（アンカープレート）４と第２のプレート（下くさび）６Ａ、６Ｂとの間に、外側から中心部に向けて打ち込まれ、当然に、先端側が薄く、基端側が厚く形成されている。
従って、下くさび６Ａの上側に上くさび９Ａを挿入し、また、下くさび６Ｂの上側に上くさび９Ｂを挿入し、両方の外側から中心部に向けて上くさび９Ａ、９Ｂを打ち込む。 Like the second plates (lower wedges) 6A and 6B, the wedge members (upper wedges) 9A and 9B are divided into two parts. Therefore, each divided body is divided into the first plate (anchor plate) 4 and It is driven between the second plates (lower wedges) 6A and 6B from the outside toward the center, and naturally, the distal end side is thin and the proximal end side is thick.
Therefore, the upper wedge 9A is inserted above the lower wedge 6A, and the upper wedge 9B is inserted above the lower wedge 6B, and the upper wedges 9A and 9B are driven from both outside toward the center.

これにより、仮受け対象の構造物１の荷重を第１のプレート（アンカープレート）４、くさび部材（上くさび）９Ａ、９Ｂ、第２のプレート（下くさび）６Ａ、６Ｂを介して、仮受け用の支持部材２で受けることができ、この段階で油圧ジャッキ８の撤去が可能となる。
尚、上くさび９Ａ、９Ｂや下くさび６Ａ、６Ｂの厚さ調整により、上くさび９Ａ、９Ｂの打ち込み量を規制して、上くさび９Ａ、９Ｂの先端が凸部３に当接しないようにしておくが、上くさび９Ａ、９Ｂの先端に凸部３を逃げるための切欠きを形成しておくようにしてもよい。 As a result, the load of the structure 1 to be temporarily received is temporarily received via the first plate (anchor plate) 4, the wedge members (upper wedges) 9A and 9B, and the second plates (lower wedges) 6A and 6B. The support jack 2 can be received, and the hydraulic jack 8 can be removed at this stage.
By adjusting the thickness of the upper wedges 9A, 9B and the lower wedges 6A, 6B, the amount of driving of the upper wedges 9A, 9B is regulated so that the tips of the upper wedges 9A, 9B do not come into contact with the convex portion 3. However, a notch for escaping the convex portion 3 may be formed at the tips of the upper wedges 9A and 9B.

図６のステップ６では、油圧ジャッキ８をジャッキダウンして後、撤去する。これにより、他の仮受け箇所への油圧ジャッキ８の転用が可能となる。
図７のステップ７では、油圧ジャッキ設置用のブラケット７を撤去する。これにより、このブラケット７についても他の仮受け箇所への転用が可能となる。
従って、本実施形態での最終的な構造物の仮受け構造は、図７に示されるように、構造物１下方の地盤中に構築された仮受け用の支持部材２と、構造物１側の対向面に固定され、凸部３を有する第１のプレート（アンカープレート）４と、支持部材２側の対向面に固定され、前記凸部３を水平方向に拘束する凹部５を有する第２のプレート（下くさび）６Ａ、６Ｂと、第１のプレート４と第２のプレート６Ａ、６Ｂとの間に打ち込まれるくさび部材（上くさび）９Ａ、９Ｂとを含んで構成される。 In step 6 of FIG. 6, the hydraulic jack 8 is jacked down and then removed. As a result, the hydraulic jack 8 can be diverted to other temporary receiving locations.
In step 7 of FIG. 7, the bracket 7 for installing the hydraulic jack is removed. As a result, the bracket 7 can be diverted to other provisional receiving locations.
Therefore, the temporary structure of the final structure in the present embodiment is, as shown in FIG. 7, the temporary support member 2 constructed in the ground below the structure 1 and the structure 1 side. A first plate (anchor plate) 4 having a convex portion 3 fixed to the opposite surface of the first member and a second plate having a concave portion 5 fixed to the opposing surface on the support member 2 side and restraining the convex portion 3 in the horizontal direction. Plate (lower wedges) 6A and 6B, and wedge members (upper wedges) 9A and 9B driven between the first plate 4 and the second plates 6A and 6B.

また、図示は省略するが、くさび部材（上くさび）９Ａ、９Ｂを抜け止めする抜け止め部材を設けるとよい。この抜け止め部材は、支持部材２に溶接固定して、その一部をくさび部材（上くさび）９Ａ、９Ｂの基端部に当接させればよい。
このような仮受け完了状態では、既存の支持部材（既存杭）の撤去が可能となる。
仮受け中に構造物の沈下等によりレベル調整が必要になった場合は、支持部材２に再び油圧ジャッキ設置用のブラケット７を取付けて、油圧ジャッキ８を設置し、ジャッキアップして、くさび部材（上くさび）９Ａ、９Ｂを打ち増しすればよい。沈下量が大きい場合は、より厚い別のくさび部材に交換して打ち込むか、厚さ調整用のシムを介在させるなどすればよい。 Although illustration is omitted, it is preferable to provide a retaining member for retaining the wedge members (upper wedges) 9A and 9B. The retaining member may be fixed to the support member 2 by welding and a part thereof may be brought into contact with the base end portions of the wedge members (upper wedges) 9A and 9B.
In such a temporary receiving completion state, it is possible to remove the existing support member (existing pile).
If it is necessary to adjust the level due to the settlement of the structure during the temporary receiving, the bracket 7 for installing the hydraulic jack is attached to the support member 2 again, the hydraulic jack 8 is installed, the jack is raised, and the wedge member is installed. (Upper wedge) What is necessary is just to increase 9A and 9B. When the amount of settlement is large, it may be replaced with a thicker wedge member or driven, or a thickness adjusting shim may be interposed.

本実施形態によれば、プレロードが終われば油圧ジャッキ８は撤去できるので、仮受け用専用ジャッキを設置したままにする場合に比べ、低コストとなる。特に、仮受け箇所が多数ある場合や、仮受け期間が長い場合に有利である。また、油圧ジャッキ８の使用は一時的であり、仮受け専用の特殊なジャッキではなく、一般のものでよい。また、仮受け期間中は、油圧ジャッキ８で荷重を負担する必要がないので、ジャッキの破損、不具合による沈下の心配がない。 According to this embodiment, since the hydraulic jack 8 can be removed after the preloading is completed, the cost is lower than in the case where the temporary receiving jack is left installed. In particular, it is advantageous when there are a large number of provisional receiving locations or when the provisional receiving period is long. The use of the hydraulic jack 8 is temporary, and may be a general jack, not a special jack dedicated to temporary receiving. Further, during the provisional receiving period, it is not necessary to bear the load with the hydraulic jack 8, so there is no fear of the jack being damaged or settling due to a malfunction.

その一方、くさび部材９Ａ、９Ｂを用いて仮受けすることで、構造物１を上昇させる方向には固定されていないので、くさび部材９Ａ、９Ｂの打ち込みにより、いつでもレベル調整が可能である。
また、凸部（せん断キー）３と凹部（拘束部）５との嵌め合いにより、地震時の水平力に対して抵抗でき、仮受け中も構造物１の耐震性を保つことができる。 On the other hand, since the wedge members 9A and 9B are temporarily received and are not fixed in the direction in which the structure 1 is raised, the level can be adjusted at any time by driving the wedge members 9A and 9B.
Further, the fitting between the convex portion (shear key) 3 and the concave portion (restraining portion) 5 can resist the horizontal force at the time of an earthquake, and the seismic resistance of the structure 1 can be maintained even during provisional reception.

また、本実施形態によれば、第２のプレート６Ａ、６Ｂは、第１のプレート４側の凸部３を水平方向から挟み込むように、凹部５を通る分割線で複数に分割されていることにより、組み立てが容易で、水平方向の拘束も確実となる。但し、分割数は２つに限らず、それ以上としてもよい。
また、本実施形態によれば、くさび部材９Ａ、９Ｂは、複数設けられ、第１のプレート４と第２のプレート６Ａ、６Ｂとの間に外側から中心部に向けて打ち込まれることにより、均等に打ち込むことができる。それゆえ、その数は２つに限らず、それ以上としてもよい。 In addition, according to the present embodiment, the second plates 6A and 6B are divided into a plurality of dividing lines that pass through the concave portion 5 so as to sandwich the convex portion 3 on the first plate 4 side from the horizontal direction. As a result, assembly is easy, and horizontal restraint is also ensured. However, the number of divisions is not limited to two and may be more than that.
In addition, according to the present embodiment, a plurality of wedge members 9A and 9B are provided, and are driven equally between the first plate 4 and the second plates 6A and 6B from the outside toward the center. Can be driven into. Therefore, the number is not limited to two and may be more.

また、本実施形態によれば、くさび部材９Ａ、９Ｂが打ち込まれる空間を形成する第１のプレート４及び第２のプレート６Ａ、６Ｂのうちいずれか一方を、打ち込み方向入口側が薄く、打ち込み方向奥側が厚い、逆くさび形状としたことにより、くさび部材９Ａ、９Ｂの打ち込みにより支持力を発生させる際に、支持力の発生方向が正しく仮受け方向になるようにすることができる。 In addition, according to the present embodiment, one of the first plate 4 and the second plates 6A and 6B that form a space into which the wedge members 9A and 9B are driven is thin in the driving direction entrance side and is deep in the driving direction. By adopting a reverse wedge shape with a thicker side, when the support force is generated by driving the wedge members 9A and 9B, the generation direction of the support force can be correctly set to the provisional receiving direction.

また、本実施形態によれば、支持部材２は、構造物１の荷重を一時的に仮受けする油圧ジャッキ８を設置可能なジャッキ設置部（ジャッキ設置用ブラケット７、又はこのブラケット７をボルト固定するための取付孔）を有し、くさび部材９Ａ、９Ｂは、前記ジャッキ設置部に設置された油圧ジャッキ８の伸長状態にて打ち込まれることにより、くさび部材９Ａ、９Ｂの打ち込みが容易となり、打ち込み量の管理も容易となる。 Moreover, according to this embodiment, the support member 2 is a jack installation part (the jack installation bracket 7 or this bracket 7 is bolt-fixed) which can install the hydraulic jack 8 which temporarily receives the load of the structure 1 temporarily. And the wedge members 9A and 9B are driven in the extended state of the hydraulic jack 8 installed in the jack installation portion, so that the wedge members 9A and 9B can be driven easily. The amount can be easily managed.

また、本実施形態によれば、前記ジャッキ設置部は、複数の油圧ジャッキ８を支持部材２から張り出して支持部材２を囲む位置に設置可能であることにより、くさび部材９Ａ、９Ｂの打ち込みの際に、その周囲の複数箇所で油圧ジャッキ８により支持しているので、安全に打ち込むことができる。
次に本発明の他の実施形態について図９により説明する。 Further, according to the present embodiment, the jack installation portion can be installed at a position surrounding the support member 2 by projecting the plurality of hydraulic jacks 8 from the support member 2, so that the wedge members 9 A and 9 B are driven. In addition, since it is supported by the hydraulic jack 8 at a plurality of locations around it, it can be driven safely.
Next, another embodiment of the present invention will be described with reference to FIG.

図９は他の実施形態での最終的な仮受け構造を示している。
本実施形態での構造物１の仮受け構造は、構造物１下方の地盤中に構築された仮受け用の支持部材２と、支持部材２側の対向面に固定され、凸部１１を有する第１のプレート１２と、構造物１側の対向面に固定され、前記凸部１１を水平方向に拘束する凹部１３を有する第２のプレート１４Ａ、１４Ｂと、第１のプレート１２と第２のプレート１４Ａ、１４Ｂとの間に打ち込まれるくさび部材９Ａ、９Ｂとを含んで構成される。 FIG. 9 shows a final provisional receiving structure in another embodiment.
The temporary receiving structure of the structure 1 in the present embodiment includes a support member 2 for temporary reception built in the ground below the structure 1, and a convex portion 11 that is fixed to the opposing surface on the support member 2 side. A first plate 12; second plates 14A and 14B which are fixed to the opposing surface on the structure 1 side and have a concave portion 13 for restraining the convex portion 11 in the horizontal direction; the first plate 12 and the second plate Wedge members 9A and 9B driven between the plates 14A and 14B.

すなわち、図１〜図８の実施形態では、構造物１側（上側）に凸部を有する第１のプレートを配置し、支持部材２側（下側）に凹部を有する第２のプレートを配置したのに対し、図９の実施形態では、支持部材１側（下側）に凸部を有する第１のプレートを配置し、構造物１側（上側）に凹部を有する第２のプレートを配置している。
ここで、第１のプレート１２は、支持部材２のトッププレート２ａ上に溶接固定され、中央部に上向きに突出する凸部１１を有している。そして、この第１のプレート１２は、下くさびをなし、中央部が厚く、両端部が薄い、逆くさび状をなしている。 That is, in the embodiment of FIGS. 1 to 8, the first plate having the convex portion is disposed on the structure 1 side (upper side), and the second plate having the concave portion is disposed on the support member 2 side (lower side). On the other hand, in the embodiment of FIG. 9, the first plate having the convex portion is arranged on the support member 1 side (lower side), and the second plate having the concave portion is arranged on the structure 1 side (upper side). doing.
Here, the first plate 12 is fixed by welding on the top plate 2a of the support member 2, and has a convex portion 11 that protrudes upward at the center. And this 1st plate 12 has comprised the lower wedge, the center part is thick, and both ends are thin, and has comprised the reverse wedge shape.

第２のプレート１４Ａ、１４Ｂは、構造物１の下面に支持架台１５を介して取付けられて、アンカープレートをなし、前記凹部１３を通る分割線で２つに分割されている。
くさび部材（上くさび）９Ａ、９Ｂは、第１のプレート（下くさび）１２と第２のプレート（アンカープレート）１４Ａ、１４Ｂとの間に打ち込まれる。
図９の実施形態は、図１〜図８の実施形態に対し、凸部を下側、凹部を上側にしただけであり、図１〜図８の実施形態と同様の効果が得られる。 The second plates 14 A and 14 B are attached to the lower surface of the structure 1 via a support base 15 to form an anchor plate, and are divided into two by a dividing line passing through the recess 13.
The wedge members (upper wedges) 9A and 9B are driven between the first plate (lower wedge) 12 and the second plates (anchor plates) 14A and 14B.
The embodiment of FIG. 9 has only the convex part on the lower side and the concave part on the upper side of the embodiment of FIGS. 1 to 8, and the same effect as the embodiment of FIGS. 1 to 8 can be obtained.

次に本発明に係る構造物の仮受け構造及び仮受け方法の具体的適用例について、図１０〜図１３により説明する。ここでは、既存建物への地下躯体構築及び免震化工事のために仮受けを行うものとする。
図１０は既存建物の仮受けのための杭打ちの工程を示している。
既存建物１０１は既存杭１０２により支持されている。この既存建物１０１の仮受け工事に先立って、土留壁１０３を施工した上で、仮受け支柱（仮受け杭）１０４を打ち込んだ本設杭１０５と、建物外周の土留杭１０６（一部は仮受け杭を兼ねる）を施工する。 Next, specific application examples of the temporary receiving structure and the temporary receiving method of the structure according to the present invention will be described with reference to FIGS. Here, provisional acceptance will be performed for the construction of underground structures in existing buildings and seismic isolation work.
FIG. 10 shows a pile driving process for temporarily receiving an existing building.
The existing building 101 is supported by the existing pile 102. Prior to the temporary construction work of the existing building 101, after constructing the retaining wall 103, a permanent pile 105 into which a temporary supporting column (temporary receiving pile) 104 is driven, and a retaining pile 106 on the outer periphery of the building (some are temporarily (Also serves as a receiving pile).

図１１は仮受けの工程を示している。
既存建物１０１の壁Ｗ直下に少しずつ開口を開け、壁Ｗの延設方向に沿って壁下梁１０７を構築する。また、壁下梁１０７から仮受け支柱１０４（又は土留杭１０６）まで延びる仮受け杭上部梁１０８を構築し、仮受け支柱１０４（又は土留め杭１０６）と仮受け杭上部梁１０８との間で仮受けを行う。 FIG. 11 shows a provisional receiving process.
Openings are opened little by little immediately below the wall W of the existing building 101, and the underwall beam 107 is constructed along the extending direction of the wall W. Further, a temporary support pile upper beam 108 extending from the lower wall beam 107 to the temporary support post 104 (or the retaining pile 106) is constructed, and the temporary support post 104 (or the retaining pile 106) and the temporary support pile upper beam 108 are disposed. Make a provisional receipt.

すなわち、図１１の仮受け杭上部梁１０８を図１の構造物１，図１１の仮受け支柱１０４を図１の支持部材２として、図１〜図７に示した態様で仮受けを行う。
ここで、壁下梁１０７及び仮受け杭上部梁１０８の形成方法について、図１４により詳しく説明する。既存杭１０２を含む既存基礎に支持されている既存建物１０１の壁Ｗに開口をあけ、その開口に壁下梁１０７を打設し、開口を大きくしながら、打設を繰り返して、壁Ｗに沿って壁下梁１０７を構築する。そして、壁下梁１０７から仮受け支柱１０４上方まで延びる仮受け杭上部梁１０８を打設し、仮受け杭上部梁１０８を仮受け支柱１０４で仮受けする。これにより既存杭１０２を含む既存基礎の撤去が可能となる。 That is, temporary receiving is performed in the form shown in FIGS. 1 to 7 with the temporary receiving pile upper beam 108 in FIG. 11 as the structure 1 in FIG. 1 and the temporary receiving support column 104 in FIG. 11 as the support member 2 in FIG.
Here, the formation method of the wall lower beam 107 and the temporary receiving pile upper beam 108 will be described in detail with reference to FIG. An opening is made in the wall W of the existing building 101 supported by the existing foundation including the existing pile 102, and the lower wall beam 107 is placed in the opening. A lower wall beam 107 is constructed along the wall. Then, the temporary receiving pile upper beam 108 extending from the lower wall beam 107 to above the temporary receiving column 104 is placed, and the temporary receiving pile upper beam 108 is temporarily received by the temporary receiving column 104. Thereby, the existing foundation including the existing pile 102 can be removed.

図１２は仮受け期間中の地下躯体構築工事の工程を示している。
仮受け完了後、既存杭１０２を含む既存基礎を撤去し、掘削でできた地下空間に地下躯体１０９を構築する。このとき、仮受け支柱１０４はブレース補強して用いる。また、仮受け期間中は、上部の建物１０１に重大な変形が生じないように、変形計測と制御管理とを行う。 FIG. 12 shows the underground building construction process during the provisional period.
After completion of provisional reception, the existing foundation including the existing piles 102 is removed, and the underground frame 109 is constructed in the underground space formed by excavation. At this time, the temporary support column 104 is used with brace reinforcement. In addition, during the provisional reception period, deformation measurement and control management are performed so that significant deformation does not occur in the upper building 101.

図１３は免震化工事の工程を示している。
地下躯体１０９の構築後、地下躯体１０９の上部と、既存建物１０１側の壁下梁１０７との間に免震用のアイソレータ１１０を配置し、既存建物１０１の荷重をアイソレータ１１０により移行させる。荷重移行後、仮受け支柱１０４（及び不要な仮受け杭上部梁１０８）を撤去する。これにより仮受けが終了する。 FIG. 13 shows the process of seismic isolation work.
After the construction of the underground housing 109, a seismic isolation isolator 110 is arranged between the upper portion of the underground housing 109 and the underwall beam 107 on the existing building 101 side, and the load of the existing building 101 is transferred by the isolator 110. After the load shift, the temporary support post 104 (and unnecessary temporary support pile upper beam 108) are removed. This completes provisional acceptance.

尚、以上では、既存建物への地下躯体構築及び免震化工事のために仮受けを行う例で説明したが、本発明は、建物を含む各種構造物の工事において当該構造物を仮受けする必要がある場合に適用可能である。
このように図示の実施形態はあくまで本発明を例示するものであり、本発明は、説明した実施形態により直接的に示されるものに加え、特許請求の範囲内で当業者によりなされる各種の改良・変更を包含するものであることは言うまでもない。 In the above description, an example is described in which provisional reception is performed for construction of an underground building and seismic isolation in an existing building. However, the present invention provisionally receives the structure in the construction of various structures including the building. Applicable when necessary.
Thus, the illustrated embodiments are merely illustrative of the present invention, and the present invention includes various improvements made by those skilled in the art within the scope of the claims, in addition to those directly illustrated by the described embodiments. -Needless to say, it encompasses changes.

１仮受け対象の構造物
２仮受け用の支持部材
２ａトッププレート
３凸部（せん断キー）
４第１のプレート（アンカープレート）
５凹部
６Ａ、６Ｂ第２のプレート（下くさび）
７ジャッキ設置用ブラケット
７ａ、７ｂ板材
７ｃ支持台
８油圧ジャッキ
９Ａ、９Ｂくさび部材（上くさび）
１１凸部
１２第１のプレート（下くさび）
１３凹部
１４Ａ、１４Ｂ第２のプレート（アンカープレート）
１５支持架台
１０１既存建物
１０２既存杭
１０３土留壁
１０４仮受け支柱
１０５本設杭
１０６土留杭
１０７壁下梁
１０８仮受け杭上部梁
１０９地下躯体
１１０アイソレータ DESCRIPTION OF SYMBOLS 1 Structure for temporary receipt 2 Support member for temporary receipt 2a Top plate 3 Convex part (shear key)
4 First plate (anchor plate)
5 Recess 6A, 6B Second plate (lower wedge)
7 Bracket for jack installation 7a, 7b Plate material 7c Support base 8 Hydraulic jack 9A, 9B Wedge member (upper wedge)
11 convex portion 12 first plate (lower wedge)
13 Concave portions 14A and 14B Second plate (anchor plate)
15 support frame 101 existing building 102 existing pile 103 retaining wall 104 temporary support column 105 main pile 106 retaining pile 107 wall under beam 108 temporary receiving pile upper beam 109 underground frame 110 isolator

Claims

A temporary receiving structure for a structure that temporarily receives a load of the structure,
A support member for temporary support constructed in the ground below the structure;
A first plate that is fixed to any one of the opposing surfaces of the structure and the support member and has a convex portion;
A second plate having a recess fixed to the other facing surface and restraining the protrusion in the horizontal direction;
A wedge member driven between the first plate and the second plate;
It is configured to include a,
The temporary receiving structure for a structure, wherein the second plate is divided into a plurality of dividing lines passing through the concave portions so as to sandwich the convex portions from the horizontal direction .

2. The temporary receiving structure for a structure according to claim 1 , wherein a plurality of the wedge members are provided and are driven from the outside toward the center portion between the first plate and the second plate. .

The one of the first and second plates forming the space into which the wedge member is driven has a reverse wedge shape in which the inlet side in the driving direction is thin and the back side in the driving direction is thick. A temporary receiving structure for a structure according to claim 1 .

The support member has a jack installation portion capable of installing a hydraulic jack that temporarily temporarily receives the load of the structure,
The said wedge member is driven in the expansion | extension state of the said hydraulic jack installed in the said jack installation part, The temporary receipt structure of the structure of any one of Claims 1-3 characterized by the above-mentioned. .

The temporary receiving structure for a structure according to claim 4 , wherein the jack installation section can install a plurality of hydraulic jacks overhanging the support member and surround the support member.

When temporarily receiving the load of the structure,
Build a temporary support member in the ground below the structure,
Fixing a first plate having a convex portion on one of the opposing surfaces of the structure and the support member;
Fixing the second plate having a concave portion that restrains the convex portion in the horizontal direction on the other facing surface;
After temporarily receiving the load of the structure by installing and extending a hydraulic jack between the support member and the structure,
A method for temporarily receiving a structure, wherein a wedge member is driven between the first plate and the second plate to remove the hydraulic jack.

The temporary receiving method for a structure according to claim 6 , wherein when the hydraulic jack is installed, a plurality of the hydraulic jacks are installed at positions that protrude from the support member and surround the support member.