JPH0351429A - Earthquake relieving foundation construction for structure - Google Patents
Earthquake relieving foundation construction for structureInfo
- Publication number
- JPH0351429A JPH0351429A JP18366789A JP18366789A JPH0351429A JP H0351429 A JPH0351429 A JP H0351429A JP 18366789 A JP18366789 A JP 18366789A JP 18366789 A JP18366789 A JP 18366789A JP H0351429 A JPH0351429 A JP H0351429A
- Authority
- JP
- Japan
- Prior art keywords
- ground
- foundation
- pile
- earthquake
- piles
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010276 construction Methods 0.000 title description 3
- 239000000463 material Substances 0.000 claims abstract description 12
- 238000013016 damping Methods 0.000 claims abstract description 10
- 238000002955 isolation Methods 0.000 claims abstract description 8
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000000926 separation method Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Foundations (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は建築物、工作物その他の構造物の基礎に適用さ
れる免震基礎構造に係るものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a seismic isolation foundation structure applied to the foundations of buildings, works, and other structures.
（従来の技術）
従来、基礎杭の施工に際しては、上部構造物（ａ）直下
の地盤（ロ）に基礎杭（Ｃ）を支持層（イ）まで貫入し
、杭頭部を研ってレベルを合わせ、しかるのち基礎梁，
柱の配筋を行ない、同基礎梁及び柱と前記抗との間にフ
ーチングを構築して抗及び基礎梁並に柱を一体に接合し
ていた。（第４図参照）（発明が解決しようとする課題
）
前記従来工法によれば、上部構造物は地盤に接して固定
され、基礎抗も杭躯体の外周地盤に接して固定されるの
で、地震波は前記抗及び地盤を伝って上部構造物に伝達
されることとなり、同構造物に対する地震入力が大とな
り、同上部構造物には耐震部材が密に組入れられること
となる。(Conventional technology) Conventionally, when constructing foundation piles, the foundation pile (C) is penetrated into the ground (b) directly under the superstructure (a) up to the supporting layer (a), and the pile head is sharpened to level it. Then, the foundation beam,
The pillars were reinforced, and footings were constructed between the foundation beams and columns and the pillars to connect the pillars, foundation beams, and pillars together. (See Figure 4) (Problems to be Solved by the Invention) According to the conventional construction method, the superstructure is fixed in contact with the ground, and the foundation shaft is also fixed in contact with the ground on the outer periphery of the pile frame. will be transmitted to the superstructure through the resistor and the ground, and the earthquake input to the structure will become large, and earthquake-resistant members will be densely assembled in the superstructure.
本発明は従来技術の有する問題点に鑑みて提案されたも
ので、その目的とする処は、地震時における上部構造物
の地震入力及び応答が低減される構造物の免Ｍ基礎構造
を提供する点にある。The present invention has been proposed in view of the problems of the prior art, and its purpose is to provide an M-free foundation structure for a structure in which seismic input and response of the superstructure during an earthquake is reduced. At the point.
（課題を解決するための手段）
前記の目的を達威するため、本発明に係る構造物の免震
基礎構造は、杭頭部が地盤面より上方に離隔して位置す
るように、上部構造物直下の地盤に、支持層まで貫入さ
れた基礎抗における杭躯体と同杭躯体の外周地盤とを構
造的に絶縁するとともに、前記杭頭部で前記構造物を支
持して構成されている。(Means for Solving the Problems) In order to achieve the above-mentioned object, the base isolation foundation structure of the structure according to the present invention has a structure in which the upper structure is The structure is constructed by structurally insulating the pile frame in the foundation shaft penetrated to the supporting layer into the ground immediately below the structure and the outer ground of the pile frame, and supporting the structure with the pile head.
また前記杭躯体と外周地盤とを構造的に絶縁し、地震波
が地盤より基礎杭に伝達しないように、同杭躯体の外周
地盤に同杭躯体と同心状に貫入された分離部材と、前記
杭躯体との間に減衰材を介装するものである。In addition, in order to structurally insulate the pile frame and the outer ground and prevent seismic waves from being transmitted from the ground to the foundation pile, a separation member penetrated into the outer circumferential ground of the pile frame concentrically with the pile frame; A damping material is interposed between the structure and the structure.
（作用）
本発明によれば前記したように、上部構造物直下の地盤
に、支持層まで貫入された基礎杭における前記地盤面よ
り上方に離隔して位置する杭頭部において、前記上部構
造物を支持したことによって、同構造物を前記地盤より
分離し、一方、前記基礎抗の杭躯体と、同躯体外周地盤
とを構造的に絶縁したことによって、水平地震波が上部
構造物に直接伝達されなくなり、同構造物の地震時の入
力及び応答が低減される。(Function) According to the present invention, as described above, in the pile head located at a distance above the ground surface of a foundation pile that has penetrated into the ground immediately below the superstructure up to the support layer, the superstructure By supporting the structure, the structure is separated from the ground, and by structurally insulating the pile frame of the foundation shaft from the ground around the frame, horizontal seismic waves are directly transmitted to the superstructure. This reduces the input and response of the structure during an earthquake.
（実施例） 以下本発明を図示の実施例について説明する。(Example) The present invention will be described below with reference to the illustrated embodiments.
所要数のｐｃ杭、鋼管抗等より構成された基礎抗（１）
を、上部構造物（２）直下の地盤（３）に支持層（４）
まで貫入し、同各基礎杭（１）の地盤面より上方に離隔
して位置する杭頭部で前記構造物（２）を支持し、同構
造物（２）を前記地盤（３）より分離する。Foundation pile (1) consisting of the required number of PC piles, steel pipe piles, etc.
A support layer (4) is placed on the ground (3) directly below the superstructure (2).
The structure (2) is supported by the pile head located at a distance above the ground surface of each foundation pile (1), and the structure (2) is separated from the ground (3). do.
一方、前記地盤（３）内には基礎抗（１）と同心状にシ
ールドパイプ等よりなる分離部材（５）が貫入し、同分
離部材（５）と基礎杭（１）の躯体との間に、スポンジ
状またはゴム状の高分子材料等よりなる減衰材（６）を
充填し、基礎抗（１）と前記地盤（３）とを構造的に絶
縁、即ち地盤（３）からの地震波等が基礎杭に伝達され
ないようにする。なお前記減衰材（６）の充填は省略さ
れてもよい。On the other hand, a separation member (5) made of a shield pipe or the like penetrates into the ground (3) concentrically with the foundation pile (1), and between the separation member (5) and the frame of the foundation pile (1). is filled with a damping material (6) made of a sponge-like or rubber-like polymeric material, etc., to structurally insulate the foundation shaft (1) and the ground (3), that is, to prevent earthquake waves from the ground (3), etc. to prevent it from being transmitted to the foundation piles. Note that the filling of the damping material (6) may be omitted.
なお基礎抗（１）下端の固定度を増大ずる必要がある場
合には、同基礎抗（１）と前記分離部材（５）との間隙
の下端部には、コンクリート、モルタル（７）等を充填
する。In addition, if it is necessary to increase the degree of fixation of the lower end of the foundation shaft (1), concrete, mortar (7), etc. should be placed at the lower end of the gap between the foundation shaft (1) and the separation member (5). Fill.
更に必要に応じて、上部構造物（２）と地盤（３）上に
設置された剛強な支持体（８）との間に減衰ばね材（９
）を介装する。Furthermore, if necessary, a damping spring material (9) may be installed between the superstructure (2) and the rigid support (8) installed on the ground (3).
).
図示の実施例は前記したように、上部構造物（２）と地
盤（３）、及び基礎杭（１）と同杭躯体外周面の地盤と
が夫々分離されているので、水平地震波が上部構造物（
２）に直接伝播することがなくなり、地震時における同
構造物（２）の地震入力及び応答が低減される。As mentioned above, in the illustrated embodiment, the superstructure (2) and the ground (3) are separated, and the foundation pile (1) and the ground on the outer peripheral surface of the pile frame are separated, so that horizontal seismic waves are transmitted to the superstructure. thing(
2), and the seismic input and response of the same structure (2) during an earthquake are reduced.
また前記減衰ばね材（９）及び減衰材（６）によって、
上部構造物の地震や風等による振動応答が減衰され、同
上部構造物が建築物の場合、揺れが抑制されることによ
って居住性が向上される。Moreover, by the damping spring material (9) and the damping material (6),
The vibration response of the superstructure due to earthquakes, wind, etc. is attenuated, and if the superstructure is a building, the livability is improved by suppressing shaking.
（発明の効果）
本発明によれば上部構造物をその直下の地盤面に固定す
ることなく、同地盤に支持層まで貫入された基礎杭にお
ける前記地盤面より上方に離隔して位置する杭頭部で、
支持したことによって、上部構造物と地盤とを構造的に
分離するとともに、同地盤と前記基礎杭とを構造的に絶
縁したので、水平地震波が上部構造物に直接伝わらなく
なり、地震時における上部構造物の地震人力及び応答を
大幅に低減でき、従って本発明によれば上部構造物に配
設される耐震部材を低減し、構造の簡素化並に軽量化す
ることができ、工費を節減しうるちのである。(Effects of the Invention) According to the present invention, the pile cap is located at a distance above the ground surface of a foundation pile that penetrates into the ground up to the supporting layer without fixing the superstructure to the ground surface directly below the superstructure. In the department,
By supporting the superstructure, the superstructure and the ground are structurally separated, and the ground and the foundation pile are structurally insulated, so horizontal seismic waves are no longer directly transmitted to the superstructure, and the superstructure is protected during an earthquake. It is possible to significantly reduce the earthquake force and response of objects, and therefore, according to the present invention, the number of seismic members disposed in the superstructure can be reduced, the structure can be simplified and lightened, and construction costs can be reduced. It's Chino.
請求項２の発明は、前記基礎杭躯体の外周地盤内に同杭
躯体と同心状に貫入された分離部材と、前記杭躯体との
間に減衰材を介装して、上部構造物の地震や風による振
動応答を減衰し、上部構造物の揺れを抑制するようにし
たものである。The invention as claimed in claim 2 provides a separator that penetrates into the outer peripheral ground of the foundation pile body concentrically with the pile body, and a damping material is interposed between the pile body and the upper structure to prevent earthquakes. This damps the vibration response caused by wind and wind, and suppresses the shaking of the superstructure.
第１図は本発明に係る構造物の免震基礎構造の一実施例
を示す縦断面図、第２図はその抗基礎部分を示す縦断面
図、第３図は第２図の矢視■一■図、第４図は従来の構
造物の抗基礎構造を示す縦断面図である。
（１）・・・基礎杭、 （２）・・・上部構造物
、（３）・・・地盤、 （４）・・・支持層、
（５）・・・分離部材、 （６）・・・減衰材。Fig. 1 is a longitudinal cross-sectional view showing an embodiment of the base isolation foundation structure of a structure according to the present invention, Fig. 2 is a longitudinal cross-sectional view showing the anti-foundation part thereof, and Fig. 3 is a vertical cross-sectional view showing an example of the seismic isolation foundation structure of a structure according to the present invention. Figures 1 and 4 are vertical cross-sectional views showing the anti-foundation structure of a conventional structure. (1)...foundation pile, (2)...superstructure, (3)...ground, (4)...support layer,
(5) Separation member, (6) Damping material.
Claims (2)
に上部構造物直下の地盤に、支持層まで貫入された基礎
杭における杭躯体と同杭躯体の外周地盤とを構造的に絶
縁するとともに、前記杭頭部で前記構造物を支持してな
り、地震時における上部構造物の地震入力及び応答を低
減するように構成されたことを特徴とする構造物の免震
基礎構造。(1) Structurally, the pile frame and the surrounding ground of the pile frame in a foundation pile penetrated to the supporting layer in the ground directly below the superstructure so that the pile head is located apart above the ground surface. 1. A seismic isolation foundation structure for a structure, characterized in that the structure is insulated and supported by the pile head, and is configured to reduce seismic input and response of the upper structure during an earthquake.
に貫入された分離部材と、前記杭躯体との間に減衰材を
介装してなる請求項１記載の構造物の免震基礎構造。(2) The isolation of the structure according to claim 1, wherein a damping material is interposed between a separating member penetrated into the outer peripheral ground of the foundation pile body concentrically with the pile body and the pile body. Earthquake foundation structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18366789A JPH0351429A (en) | 1989-07-18 | 1989-07-18 | Earthquake relieving foundation construction for structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18366789A JPH0351429A (en) | 1989-07-18 | 1989-07-18 | Earthquake relieving foundation construction for structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0351429A true JPH0351429A (en) | 1991-03-05 |
Family
ID=16139824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18366789A Pending JPH0351429A (en) | 1989-07-18 | 1989-07-18 | Earthquake relieving foundation construction for structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0351429A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130145703A1 (en) * | 2011-12-12 | 2013-06-13 | Yutaka Tomoyasu | Seismological Engineering |
| JP2017053175A (en) * | 2015-09-11 | 2017-03-16 | 五洋建設株式会社 | Countermeasure structure against ground flow of pile-type structure and construction method thereof |
| CN111764376A (en) * | 2020-07-17 | 2020-10-13 | 燕山大学 | Earthquake-resistant building foundation pile |
-
1989
- 1989-07-18 JP JP18366789A patent/JPH0351429A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130145703A1 (en) * | 2011-12-12 | 2013-06-13 | Yutaka Tomoyasu | Seismological Engineering |
| JP2017053175A (en) * | 2015-09-11 | 2017-03-16 | 五洋建設株式会社 | Countermeasure structure against ground flow of pile-type structure and construction method thereof |
| CN111764376A (en) * | 2020-07-17 | 2020-10-13 | 燕山大学 | Earthquake-resistant building foundation pile |
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