JPH09158212A - Foundation reinforcing structure for structure group - Google Patents

Foundation reinforcing structure for structure group

Info

Publication number
JPH09158212A
JPH09158212A JP7345490A JP34549095A JPH09158212A JP H09158212 A JPH09158212 A JP H09158212A JP 7345490 A JP7345490 A JP 7345490A JP 34549095 A JP34549095 A JP 34549095A JP H09158212 A JPH09158212 A JP H09158212A
Authority
JP
Japan
Prior art keywords
foundation
underground wall
ground
foundations
underground
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP7345490A
Other languages
Japanese (ja)
Other versions
JP3687805B2 (en
Inventor
Mikio Ohashi
幹生 大橋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hazama Corp
Original Assignee
Hazama Gumi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hazama Gumi Ltd filed Critical Hazama Gumi Ltd
Priority to JP34549095A priority Critical patent/JP3687805B2/en
Publication of JPH09158212A publication Critical patent/JPH09158212A/en
Application granted granted Critical
Publication of JP3687805B2 publication Critical patent/JP3687805B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To prevent a flowing load or the load of a surface layer from being transmitted to a foundation by constructing an underground wall continued so as to nip each foundation from mutually opposed directions and surround the ground between adjacent foundations, and fixing the underground wall to the foundation by an anchor. SOLUTION: A continued underground wall 12 is fixed to a foundation 22 by an anchor 13. The underground wall 12 is formed by connecting steel sheet piles, and arranged so as to nip the foundation 22 from two opposed directions and surround the ground between the foundations 22. As the steel sheet piles, those having a length such that the underground wall 12 penetrates through liquefied layer 24 are used. An underground beam 11 is integrally formed on the upper end of the underground wall 12. Further, the ground surrounded by the foundation 22 and the underground wall 12 is soil-improved. A pipe having a tip extending to the liquefied layer 24 is provided on the side ground of the foundation 22 to drain ground water. Thus, the foundation can be isolated from the peripheral surface layer by the underground wall 12, and the surface layer is moved in the side flowing direction along the undergroundwall 12 even if the ambient ground is liquefied, so that the transmission to each foundation can be prevented.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の属する技術分野】本発明は、所定間隔ごとに所
定の方向に構築した複数の既存構造物群または新設構造
物群の基礎補強構造に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foundation reinforcing structure for a plurality of existing structure groups or new structure groups constructed in a predetermined direction at predetermined intervals.

【0002】[0002]

【従来の技術】河川や海の付近の地盤は、非液状化層
と、その上に位置する液状化層と、液状化層の上に位置
する表面層とを備えていることがある。かような地盤で
は、多くの場合に非液状化層が河川や海に向かって斜め
下方に傾いているため、液状化現象が生じると、液状化
した土砂は非液状化層の傾斜にしたがい河川や海に向か
い流れて動くことがある。また、地震時に護岸・岸壁が
壊れて変状した場合や、液状化層の表層地盤が傾斜して
いる場合にも液状化した土砂は流動する。
2. Description of the Related Art The ground near a river or the sea may have a non-liquefied layer, a liquefied layer located on the non-liquefied layer, and a surface layer located on the liquefied layer. In such a ground, the non-liquefied layer inclines diagonally downward toward the river or the sea in many cases, so when a liquefaction phenomenon occurs, the liquefied earth and sand will follow the slope of the non-liquefied layer. It may move toward the sea and move. In addition, liquefied earth and sand will flow even when the seawall and quay are broken and deformed during an earthquake, or when the surface ground of the liquefied layer is inclined.

【0003】一方、高架橋等の橋脚、倉庫群または集合
住宅群等のなかには、複数の基礎がほぼ一定の方向に所
定の間隔で構築されているものがある。例えば、図6の
概略平面図に示したように、高架道路の基礎30,3
1,32には所定の間隔で海や河川37に向かってほぼ
一方向に構築されているものがある。かように基礎3
0,31,32が構築されている地盤において液状化が
生じた場合、側方流動化現象、すなわち液状化層の土砂
がほぼ一定の方向に並ぶ基礎と並行して流動する現象が
起こることがある。
On the other hand, there are some bridge piers such as viaducts, warehouse groups or collective housing groups in which a plurality of foundations are constructed in a substantially constant direction at predetermined intervals. For example, as shown in the schematic plan view of FIG.
Some 1, 32 are constructed almost at one direction toward the sea or river 37 at a predetermined interval. Kayo Basic 3
When liquefaction occurs in the ground where 0, 31, and 32 are constructed, a lateral fluidization phenomenon, that is, a phenomenon in which sediment in the liquefaction layer flows in parallel with the foundations that are arranged in a substantially constant direction, may occur. is there.

【0004】従来、一般的な地盤の液状化対策として、
構造物の基礎ごとに全周を囲む連続地中壁を構築する工
法や、あるいは図5(a),(b)に示したように、既存杭5
4の周りに増し杭53を打ち、この増し杭53と一体化
するようにフーチング52を増し打ちする増し杭工法が
提案されている。
Conventionally, as a general countermeasure against liquefaction of ground,
A method of constructing a continuous underground wall that surrounds the entire circumference for each foundation of the structure, or as shown in Figs. 5 (a) and 5 (b), existing piles 5
An additional pile construction method is proposed in which additional piles 53 are hammered around 4 and the footings 52 are additionally hammered so as to be integrated with the additional piles 53.

【0005】[0005]

【発明が解決しようとする課題】しかしながら、図6に
示したように基礎32周辺で地盤が液状化して側方流動
が起こると、地盤の表面層には基礎32のコーナーから
略斜め方向に亀裂35が生じたという被害事例からもわ
かるように、基礎32の正面と斜め方向との広範囲に及
ぶ表面層36の過大な荷重が基礎32に伝達する。以上
のような表面層の過大な荷重の伝達は、従来の基礎単体
を補強する工法によっては防止することができず、基礎
32やその上部構造物を崩壊させることがある。また上
記従来の工法で崩壊防止ができたとしても、増し杭53
の本数やフーチング52の増し打ち量が、膨大なものに
なるため多大なコストを要して不経済である。
However, as shown in FIG. 6, when the ground is liquefied and the lateral flow occurs around the foundation 32, the surface layer of the ground is cracked from a corner of the foundation 32 in a substantially oblique direction. As can be seen from the damage example in which 35 has occurred, an excessive load of the surface layer 36 covering a wide area in the front and diagonal directions of the foundation 32 is transmitted to the foundation 32. The above-mentioned transmission of an excessive load of the surface layer cannot be prevented by the conventional method of reinforcing the basic unit, and may cause the foundation 32 and its upper structure to collapse. Even if the above-mentioned conventional construction method can prevent collapse, the additional pile 53
And the amount of additional hitting of the footing 52 becomes enormous, which requires a large cost and is uneconomical.

【0006】本発明は上記問題点を解決せんとしたもの
であり、その目的は、地盤に側方流動化現象が生じて
も、液状化層からの流動荷重や、斜め方向の広範囲に及
ぶ表面層の荷重が基礎へ伝達するのを防止し、基礎やそ
の上部構造物の崩壊防止を可能にする構造物群の基礎補
強構造を提供することにある。
The present invention has been made in order to solve the above-mentioned problems, and an object thereof is to obtain a fluidized load from a liquefaction layer and a wide range of diagonal surfaces even if a lateral fluidization phenomenon occurs in the ground. An object of the present invention is to provide a foundation reinforcing structure for a group of structures that prevents the load of a layer from being transmitted to the foundation and prevents collapse of the foundation and its upper structure.

【0007】本発明の別の目的は、基礎間の地盤を比較
的強く拘束することができ、これにより基礎間の液状化
を抑制することができる構造物群の基礎補強構造を提供
することにある。
Another object of the present invention is to provide a foundation reinforcing structure for a group of structures capable of restraining the ground between the foundations relatively strongly and thereby suppressing liquefaction between the foundations. is there.

【0008】また本発明の別の目的は、各基礎の水平耐
力を向上することができる構造物群の基礎補強構造を提
供することにある。
Another object of the present invention is to provide a foundation reinforcing structure for a group of structures which can improve the horizontal bearing capacity of each foundation.

【0009】さらに本発明の別の目的は、土砂硬化剤を
注入して基礎間の地盤改良を行う場合に、基礎間の土砂
を効率良く硬化させることができる構造物群の基礎補強
構造を提供することにある。
Still another object of the present invention is to provide a foundation reinforcing structure of a structure group capable of efficiently curing earth and sand between foundations when a soil and sand hardening agent is injected to improve the ground between foundations. To do.

【0010】[0010]

【課題を解決するための手段】本発明は、前記目的に鑑
みてなされたものであり、その要旨は、所定の方向にそ
れぞれ所定の間隔で構築した複数の構造物の基礎補強構
造であって、前記各基礎を対向する二方向から挟むと共
に隣合う前記各基礎間の地盤を囲んで連続する地中壁を
構築し、該地中壁を固定手段で前記各構造物に固定した
ことを特徴とする構造物群の基礎補強構造にある。
The present invention has been made in view of the above-mentioned object, and its gist is a basic reinforcing structure for a plurality of structures constructed at predetermined intervals in predetermined directions. Characterized in that a continuous underground wall is constructed by sandwiching the foundations from two opposite directions and surrounding a ground between the adjacent foundations, and the underground wall is fixed to the respective structures by a fixing means. It is in the basic reinforcement structure of the structure group.

【0011】本発明の構造物群の基礎補強構造におい
て、所定の方向にそれぞれ所定の間隔で構築した複数の
構造物としては、例えば、高架橋等の橋脚、倉庫群また
は集合住宅群等があり、これらの基礎は略等間隔または
それぞれ所定の異なる間隔で、ほぼ直線状に一定の方向
に並んで構築されていたり又は緩やかな曲線を描きなが
ら一定の方向に並んで構築されている。
In the foundation reinforcing structure of the structure group of the present invention, as the plurality of structures constructed at predetermined intervals in a predetermined direction, for example, there are bridge piers such as viaducts, warehouse groups or collective housing groups, These foundations are constructed in a substantially straight line and arranged in a certain direction at substantially equal intervals, or are formed in a certain direction while drawing a gentle curve.

【0012】本発明において前記地中壁は、基礎の周囲
の地盤が液状化して側方流動が生じた場合、この側方流
動した土砂やその上の表面層と、各基礎間の土砂やその
上の表面層とを絶縁できる壁体であれば良く、例えば、
シートパイルによる連続地中壁、ソイルモルタルで形成
した地中柱を鉄骨で補強した柱列壁、あるいは場所打ち
鉄筋コンクリートで形成した連続地中壁等を採用するこ
とができ、好ましくは、シートパイルにより地中壁を構
築する。シートパイルによる地中壁は、他の地中壁と比
較して作業スペースをとらないコンパクトな施工機械で
経済的に構築できるという利点がある。ここで、シート
パイルの材料は適宜選択可能であり、例えば、木矢板、
鉄筋コンクリート矢板、プレストレストコンクリート矢
板、加圧コンクリート矢板および鋼矢板等のうちから適
宜選択することができ、好ましくは鋼矢板により連続す
る地中壁を構築する。なお、シートパイルとして鋼矢板
を採用すると、その継手により引張力を伝達できるし、
液状化により発生する過剰間隙水圧を遮断できるという
利点がある。
In the present invention, when the ground around the foundation is liquefied and a lateral flow is generated, the underground wall is the laterally flown earth and sand and the surface layer on the earth and sand, and the earth and sand between the foundations and the earth and sand. As long as it is a wall that can insulate the upper surface layer, for example,
It is possible to employ a continuous underground wall with a sheet pile, a column row wall reinforced with a steel frame for an underground pillar formed with soil mortar, or a continuous underground wall formed with cast-in-place reinforced concrete, preferably by a sheet pile. Build an underground wall. An underground wall made of sheet pile has an advantage that it can be economically constructed with a compact construction machine that does not occupy a working space as compared with other underground walls. Here, the material of the sheet pile can be appropriately selected, for example, wood sheet pile,
It can be appropriately selected from reinforced concrete sheet piles, prestressed concrete sheet piles, pressurized concrete sheet piles, steel sheet piles and the like, and preferably steel sheet piles are used to construct a continuous underground wall. If steel sheet pile is used as the sheet pile, the joint can transmit tensile force,
There is an advantage that excess pore water pressure generated by liquefaction can be blocked.

【0013】本発明において、地中壁を各基礎に固定す
るための固定手段としては、例えば、アンカーボルトま
たは鉄筋等を使用することができる。
In the present invention, as the fixing means for fixing the underground wall to each foundation, for example, anchor bolts or reinforcing bars can be used.

【0014】本発明において前記各基礎間にはこれらを
連結する連結補強部材を設けても良く、この連結補強部
材は、それぞれ隣合う各基礎を連結し、各基礎に作用す
る水平方向の力を隣の基礎に伝達することができれば良
い。かような連結補強部材としては、例えばワイヤーロ
ープ、ストランド、鉄骨、鉄筋、鉄筋コンクリートまた
はタイロッドを使用することができる。
In the present invention, a connecting reinforcing member may be provided between the foundations for connecting them, and the connecting reinforcing member connects adjacent foundations to each other and applies a horizontal force acting on each foundation. It would be good if it could be transmitted to the next foundation. As such a connecting reinforcing member, for example, a wire rope, a strand, a steel frame, a reinforcing bar, a reinforced concrete or a tie rod can be used.

【0015】また本発明において前記地中壁に囲まれた
所定の基礎間の地盤には土砂硬化剤を注入しても良く、
この土砂硬化剤は、土砂に止水膜を形成して土質の強度
を向上し、地震時に地盤が容易に液状化しないようにで
きるものであれば良い。かような土砂硬化剤としては、
例えば、セメントグラウト等のセメント系固化剤、水ガ
ラス系固化剤または尿素やアクリルアミド等の樹脂系固
化剤等を使用することができる。
In the present invention, a soil hardening agent may be injected into the ground between predetermined foundations surrounded by the underground wall,
The earth and sand hardening agent may be any as long as it can form a water blocking film on the earth and sand to improve the strength of soil and prevent the ground from easily liquefying during an earthquake. As such earth and sand hardening agent,
For example, a cement-based solidifying agent such as cement grout, a water glass-based solidifying agent, or a resin-based solidifying agent such as urea or acrylamide can be used.

【0016】さらに本発明において前記地中壁に一以上
の地下水排除手段を設けても良く、この地下水排除手段
は、少なくとも、地盤中の振動等により帯水層の水圧が
上昇したときに帯水層の水を排除できる手段であれば良
い。かような地下水排除手段としては、例えば、砂や礫
等によって地中に形成した柱状体、有孔パイプ、合成樹
脂パイプまたはスクリーン管を使用することができる。
Further, in the present invention, one or more groundwater removing means may be provided on the underground wall, and the groundwater removing means is provided at least when the water pressure of the aquifer increases due to vibration in the ground or the like. Any means can be used as long as it can remove the water in the layer. As such groundwater removing means, for example, a columnar body formed of sand or gravel in the ground, a perforated pipe, a synthetic resin pipe or a screen pipe can be used.

【0017】[0017]

【実施例】本発明の実施例を添付図面に基づいて以下に
説明する。図1は橋脚基礎に適用した本発明の基礎補強
構造を示す断面図であり、図2は図1における一点鎖線
II−IIに沿った縦断面図であり、図3は図1における一
点鎖線III−IIIに沿った平断面図であり、図4は図1乃
至図3とは異なる実施例を示す平断面図である。図1乃
至図3に示したように、本発明の基礎補強構造を適用す
る橋脚21は、複数の杭23とその上に一体に形成され
たフーチング22とからなる基礎によって支持され、上
部に高架道路20を支持している。このような高架道路
のフーチング22は所定の方向に所定の間隔で構築され
ており、例えば、河川を渡る高架道路は多くの場合に河
川に直交するような配置で設けられており、また港湾や
海岸に延びる高架道路には海に対してほぼ垂直な配置で
設けられたものもある。
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 is a cross-sectional view showing a foundation reinforcing structure of the present invention applied to a pier foundation, and FIG. 2 is a chain line in FIG.
FIG. 4 is a vertical sectional view taken along line II-II, FIG. 3 is a horizontal sectional view taken along alternate long and short dash line III-III in FIG. 1, and FIG. 4 is a horizontal sectional view showing an embodiment different from FIGS. 1 to 3. Is. As shown in FIGS. 1 to 3, a bridge pier 21 to which the foundation reinforcement structure of the present invention is applied is supported by a foundation composed of a plurality of piles 23 and a footing 22 integrally formed on the piles 23, and is elevated above. It supports the road 20. The footing 22 of such an elevated road is constructed at a prescribed interval in a prescribed direction. For example, an elevated road that crosses a river is often provided in an arrangement that is orthogonal to the river. Some elevated roads extending to the coast are installed almost vertically to the sea.

【0018】かような橋脚21に、本発明では主要部と
して、連続する地中壁12と、地中壁12をフーチング
22に固定する固定手段としてのアンカーボルト13と
を設けることにより、基礎構造の補強を図るものであ
る。
According to the present invention, the bridge pier 21 is provided with a continuous underground wall 12 and an anchor bolt 13 as a fixing means for fixing the underground wall 12 to the footing 22 in the present invention. It is intended to reinforce.

【0019】ここで、前記地中壁12は、複数の鋼矢板
(図示せず)をその継手で連結して形成し、図3に示し
たように、橋脚21のフーチング22を対向する二方向
から挟むと共に隣合うフーチング22間の地盤を囲んで
連続するように配置する。この時、鋼矢板は図1に示し
たように地中壁12が液状化層24を貫通する程度の長
さのものを使用する。
Here, the underground wall 12 is formed by connecting a plurality of steel sheet piles (not shown) with their joints, and as shown in FIG. 3, the footings 22 of the pier 21 are opposed to each other in two directions. It is arranged so as to be continuous while surrounding the ground between the footings 22 adjacent to each other. At this time, the steel sheet pile has a length such that the underground wall 12 penetrates the liquefied layer 24 as shown in FIG.

【0020】また地中壁12の上端には、隣合う各フー
チング22,22間を連結する連結補強部材として、鉄
筋コンクリートによる地中梁11を一体に形成する。な
お、この地中梁11には、引張応力が作用しても破断し
ないように、軸方向に構造的に連続するように鉄筋を配
置する。
On the upper end of the underground wall 12, an underground beam 11 made of reinforced concrete is integrally formed as a connecting reinforcing member for connecting adjacent footings 22, 22 to each other. In this underground beam 11, reinforcing bars are arranged so as to be structurally continuous in the axial direction so as not to be broken even if tensile stress acts.

【0021】さらに各フーチング22,22間と地中壁
12,12に囲まれた地盤には、セメントグラウト等の
セメント系固化剤を注入して地盤改良をしても良い。更
にまた、地中壁12,12間の地盤あるいは地中壁12
やフーチング22の側方の地盤には、先端が液状化層に
達するパイプ(図示せず)を設け、地下水を抜くように
しても良い。
Further, a cement-based solidifying agent such as cement grout may be injected into the ground between the footings 22, 22 and the ground surrounded by the underground walls 12, 12 to improve the ground. Furthermore, the ground between the underground walls 12, 12 or the underground wall 12
A pipe (not shown) whose tip reaches the liquefied layer may be provided on the ground on the side of the footing 22 or the ground to drain groundwater.

【0022】なお連結補強部材としては上記地中梁11
に替えて、図4に示したように、ストランド15を各フ
ーチング22,22間に張設しても良い。この時、スト
ランド15の配設位置は適宜定めることができるが、例
えば、図4のように地中壁12から所定長離隔した位置
に設けても良く、あるいは上記地中梁11と同様に地中
壁12の上端に設けても良い。
The underground beam 11 is used as the connecting reinforcing member.
Alternatively, as shown in FIG. 4, the strand 15 may be stretched between the footings 22 and 22. At this time, the arrangement position of the strand 15 can be appropriately determined, but for example, it may be provided at a position separated by a predetermined length from the underground wall 12 as shown in FIG. It may be provided on the upper end of the inner wall 12.

【0023】以上のような基礎補強構造を備えたフーチ
ング22の周辺地盤で、液状化が生じて側方流動が起こ
った場合、地中壁12,12とフーチング22,22と
で囲まれた地盤は、地中壁12で外周の表面層と絶縁さ
れているため、図6に示したような斜めの亀裂が生じ
ず、したがって地中壁12,12の外周の表面層のみが
地中壁12,12に沿って側方流動の方向に動き、外周
の表面層の荷重がフーチング22に伝達するのを防止す
ることができる。
When liquefaction occurs and lateral flow occurs in the ground around the footing 22 having the above-mentioned basic reinforcement structure, the ground surrounded by the underground walls 12, 12 and the footing 22, 22. Is insulated from the outer peripheral surface layer by the underground wall 12, no oblique cracks as shown in FIG. 6 occur, and therefore only the outer peripheral surface layer of the underground walls 12, 12 is formed. , 12 in the lateral flow direction, and the load of the outer surface layer can be prevented from being transmitted to the footing 22.

【0024】また複数の鋼矢板により形成した地中壁1
2は、隣合う各フーチング22,22を連結し、かつ水
平方向に所定以上の引張耐力を有するため、周辺地盤に
側方流動化が生じて一部のフーチング22が水平方向に
圧力を受けても、地中壁12を介して圧力を次々に隣の
フーチング22に伝達するため、フーチング22や橋脚
21の側方流動荷重に対する耐力を向上することができ
る。さらに、地中壁12の上端には地中梁11が設けら
れているため、各フーチング22,22間の水平圧力の
伝達は、より一層効果的に行うことができる。
An underground wall 1 formed of a plurality of steel sheet piles
No. 2 connects adjacent footings 22 and 22 and has a tensile strength more than a predetermined level in the horizontal direction, so that lateral fluidization occurs in the surrounding ground and some footings 22 receive horizontal pressure. Also, since the pressure is successively transmitted to the adjacent footing 22 through the underground wall 12, the footing 22 and the pier 21 can be improved in proof stress against a lateral flow load. Furthermore, since the underground beam 11 is provided at the upper end of the underground wall 12, the horizontal pressure can be transmitted between the footings 22, 22 more effectively.

【0025】さらにフーチング22,22間の地盤が地
中壁12によって比較的強く拘束されているため、フー
チング22,22間の地盤の液状化を抑制することがで
きる。 更にまた、フーチング22,22間の地盤は地
中壁12により囲まれているため、このフーチング2
2,22間に土砂硬化剤を注入すれば、効率良く地盤改
良を行うことができる。
Further, since the ground between the footings 22 and 22 is relatively strongly restrained by the underground wall 12, liquefaction of the ground between the footings 22 and 22 can be suppressed. Furthermore, since the ground between the footings 22 and 22 is surrounded by the underground wall 12, this footing 2
If the earth and sand hardening agent is injected between 2 and 22, the ground can be improved efficiently.

【0026】[0026]

【発明の効果】本発明の基礎補強構造では、それぞれ隣
合う基礎と地中壁とで囲まれた地盤は、地中壁で外周の
表面層と絶縁されているため、周辺地盤で液状化が生じ
て側方流動が起こった場合でも、外周の表面層は地中壁
に沿って側方流動の方向に動き、各基礎への伝達を防止
できる。
In the foundation reinforcing structure of the present invention, the ground surrounded by the foundation and the underground wall which are adjacent to each other is insulated from the outer surface layer by the underground wall, so that the surrounding ground is liquefied. Even if the lateral flow occurs, the outer surface layer moves in the lateral flow direction along the underground wall and can prevent the transmission to each foundation.

【0027】また本発明の基礎補強構造では、地中壁が
隣合う各基礎を連結しているので、周辺地盤に側方流動
化が生じて一部の基礎が水平方向に圧力を受けても、地
中壁を介して圧力を次々に隣の基礎に伝達するため、基
礎やその上の構造物は、側方流動荷重に対する耐力を向
上することができる。
Further, in the foundation reinforcing structure of the present invention, since underground walls connect adjacent foundations to each other, even if some foundations are subjected to horizontal pressure due to lateral fluidization in the surrounding ground. Since the pressure is sequentially transmitted to the adjacent foundation through the underground wall, the foundation and the structure on the foundation can improve the proof stress against lateral flow load.

【0028】さらに、各基礎間は連結補強部材によって
連結されているため、各基礎間の水平圧力の伝達は、よ
り一層効果的に行うことができる。
Furthermore, since the bases are connected by the connecting reinforcing member, the horizontal pressure can be transmitted between the bases more effectively.

【0029】更にまた、各基礎間の地盤が地中壁によっ
て拘束されているため、各基礎間の地盤の液状化を抑制
することができる。
Furthermore, since the ground between the foundations is constrained by the underground wall, liquefaction of the ground between the foundations can be suppressed.

【0030】また各基礎間の地盤は地中壁により囲まれ
ているため、この基礎間に土砂硬化剤を注入すれば、効
率良く地盤改良を行うことができる。
Since the ground between the foundations is surrounded by the underground wall, the soil can be efficiently improved by injecting the earth and sand hardening agent between the foundations.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の構造物群の基礎補強構造を示す断面図
である。
FIG. 1 is a cross-sectional view showing a basic reinforcing structure of a structure group of the present invention.

【図2】図1における一点鎖線II−IIに沿った縦断面図
である。
FIG. 2 is a vertical sectional view taken along one-dot chain line II-II in FIG.

【図3】図1における一点鎖線III−IIIに沿った平断面
図である。
3 is a plan sectional view taken along the alternate long and short dash line III-III in FIG.

【図4】図1乃至図3とは異なる実施例を示す平断面図
である。
FIG. 4 is a plan sectional view showing an embodiment different from FIGS. 1 to 3;

【図5】(a)は従来例を示す側断面図であり、(b)は(a)
の平断面図である。
5A is a side sectional view showing a conventional example, and FIG. 5B is a sectional view of FIG.
FIG.

【図6】従来の基礎群に側方流動荷重が作用する状態を
示す概略平面図である。
FIG. 6 is a schematic plan view showing a state in which a lateral flow load acts on a conventional foundation group.

【符号の説明】[Explanation of symbols]

11 鉄筋コンクリートによる地中梁(連結補強部材) 12 地中壁 13 アンカー(固定手段) 15 ストランド(連結補強部材) 21 橋脚(構造物) 22 フーチング(基礎) 11 Underground beam (reinforcement member) by reinforced concrete 12 Underground wall 13 Anchor (fixing means) 15 Strand (reinforcement member) 21 Pier (structure) 22 Footing (foundation)

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 所定の方向にそれぞれ所定の間隔で構築
した複数の構造物の基礎補強構造であって、 前記各基礎を対向する二方向から挟むと共に隣合う前記
各基礎間の地盤を囲んで連続する地中壁を構築し、 該地中壁を固定手段で前記各基礎に固定したことを特徴
とする構造物群の基礎補強構造。
1. A foundation reinforcing structure for a plurality of structures, each of which is constructed at a prescribed interval in a prescribed direction, wherein each foundation is sandwiched from two opposing directions, and the ground between adjacent foundations is surrounded. A foundation reinforcing structure for a group of structures, characterized in that a continuous underground wall is constructed and the underground wall is fixed to each of the foundations by a fixing means.
【請求項2】 前記各基礎間を連結する連結補強部材を
設けたことを特徴とする請求項1記載の構造物群の基礎
補強構造。
2. The foundation reinforcing structure for a group of structures according to claim 1, further comprising a connecting reinforcing member for connecting the foundations.
【請求項3】 前記地中壁に囲まれた所定の基礎間の地
盤に、土砂硬化剤を注入したことを特徴とする請求項1
記載の構造物の基礎補強構造。
3. The earth and sand hardening agent is injected into the ground between predetermined foundations surrounded by the underground wall.
Foundation reinforcement structure of the described structure.
【請求項4】 前記地中壁に一以上の地下水排除手段を
設けたことを特徴とする請求項1記載の構造物群の基礎
補強構造。
4. The foundation reinforcing structure for a group of structures according to claim 1, wherein the underground wall is provided with one or more means for removing groundwater.
JP34549095A 1995-12-08 1995-12-08 Foundation reinforcement structure of structures Expired - Fee Related JP3687805B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP34549095A JP3687805B2 (en) 1995-12-08 1995-12-08 Foundation reinforcement structure of structures

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP34549095A JP3687805B2 (en) 1995-12-08 1995-12-08 Foundation reinforcement structure of structures

Publications (2)

Publication Number Publication Date
JPH09158212A true JPH09158212A (en) 1997-06-17
JP3687805B2 JP3687805B2 (en) 2005-08-24

Family

ID=18376942

Family Applications (1)

Application Number Title Priority Date Filing Date
JP34549095A Expired - Fee Related JP3687805B2 (en) 1995-12-08 1995-12-08 Foundation reinforcement structure of structures

Country Status (1)

Country Link
JP (1) JP3687805B2 (en)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001288758A (en) * 2000-04-04 2001-10-19 Nishimatsu Constr Co Ltd Footing earthquake resistant construction and footing earthquake resistance reinforcing method
JP2004124493A (en) * 2002-10-02 2004-04-22 Yukitake Shioi Aseismatic reinforcement construction of structure
JP2004300819A (en) * 2003-03-31 2004-10-28 Railway Technical Res Inst Non-blocking type reinforcing structure
JP2007070921A (en) * 2005-09-08 2007-03-22 Takenaka Komuten Co Ltd Liquefaction prevention method of existing building foundations standing in row
JP2008223245A (en) * 2007-03-08 2008-09-25 Nippon Steel Corp Column base structure
JP2008223325A (en) * 2007-03-13 2008-09-25 Ohbayashi Corp Earthquake-resisting reinforcing structure of viaduct
JP2008223327A (en) * 2007-03-13 2008-09-25 Ohbayashi Corp Earthquake-resisting reinforcing structure of viaduct
JP2008303598A (en) * 2007-06-07 2008-12-18 Nippon Steel Corp Column base structure in multi-column bridge pier
JP2009114722A (en) * 2007-11-06 2009-05-28 Fudo Tetra Corp Repairing and reinforcing structure for aguatic construction
JP2013155559A (en) * 2012-01-31 2013-08-15 Shimizu Corp Liquefaction damage reducing structure for construction
JP2013224529A (en) * 2012-04-20 2013-10-31 Kajima Corp Structure and method for reinforcing pile foundation
CN107165058A (en) * 2017-05-08 2017-09-15 中铁上海设计院集团有限公司 One kind is used for existing operation Bridge pier reinforcement means
JP2019007297A (en) * 2017-06-28 2019-01-17 鹿島建設株式会社 Bridge pier foundation structure
JP2019073886A (en) * 2017-10-16 2019-05-16 東日本旅客鉄道株式会社 Vibration displacement suppressing structure of structure group
JP2019073885A (en) * 2017-10-16 2019-05-16 東日本旅客鉄道株式会社 Vibration displacement suppressing structure of structure group
CN110904865A (en) * 2019-12-13 2020-03-24 广州市第三市政工程有限公司 Bridge reinforcing method and bridge reinforced by applying same
CN111254843A (en) * 2020-01-21 2020-06-09 南京铁道职业技术学院 Bridge pile foundation uplifting structure and construction method thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03202511A (en) * 1989-12-28 1991-09-04 Shimizu Corp Liquefaction-proof construction
JPH03275813A (en) * 1990-03-26 1991-12-06 Sumitomo Metal Ind Ltd Method for coping with liquefaction of embedded structure
JPH04302611A (en) * 1991-03-29 1992-10-26 Sumitomo Metal Ind Ltd Liquidification countermeasure structure of life line structure

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03202511A (en) * 1989-12-28 1991-09-04 Shimizu Corp Liquefaction-proof construction
JPH03275813A (en) * 1990-03-26 1991-12-06 Sumitomo Metal Ind Ltd Method for coping with liquefaction of embedded structure
JPH04302611A (en) * 1991-03-29 1992-10-26 Sumitomo Metal Ind Ltd Liquidification countermeasure structure of life line structure

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001288758A (en) * 2000-04-04 2001-10-19 Nishimatsu Constr Co Ltd Footing earthquake resistant construction and footing earthquake resistance reinforcing method
JP2004124493A (en) * 2002-10-02 2004-04-22 Yukitake Shioi Aseismatic reinforcement construction of structure
JP2004300819A (en) * 2003-03-31 2004-10-28 Railway Technical Res Inst Non-blocking type reinforcing structure
JP4589849B2 (en) * 2005-09-08 2010-12-01 株式会社竹中工務店 Liquefaction prevention method for existing building foundations
JP2007070921A (en) * 2005-09-08 2007-03-22 Takenaka Komuten Co Ltd Liquefaction prevention method of existing building foundations standing in row
JP2008223245A (en) * 2007-03-08 2008-09-25 Nippon Steel Corp Column base structure
JP2008223325A (en) * 2007-03-13 2008-09-25 Ohbayashi Corp Earthquake-resisting reinforcing structure of viaduct
JP2008223327A (en) * 2007-03-13 2008-09-25 Ohbayashi Corp Earthquake-resisting reinforcing structure of viaduct
JP2008303598A (en) * 2007-06-07 2008-12-18 Nippon Steel Corp Column base structure in multi-column bridge pier
JP2009114722A (en) * 2007-11-06 2009-05-28 Fudo Tetra Corp Repairing and reinforcing structure for aguatic construction
JP2013155559A (en) * 2012-01-31 2013-08-15 Shimizu Corp Liquefaction damage reducing structure for construction
JP2013224529A (en) * 2012-04-20 2013-10-31 Kajima Corp Structure and method for reinforcing pile foundation
CN107165058A (en) * 2017-05-08 2017-09-15 中铁上海设计院集团有限公司 One kind is used for existing operation Bridge pier reinforcement means
CN107165058B (en) * 2017-05-08 2019-05-21 中铁上海设计院集团有限公司 One kind being used for existing operation Bridge pier reinforcement means
JP2019007297A (en) * 2017-06-28 2019-01-17 鹿島建設株式会社 Bridge pier foundation structure
JP2019073886A (en) * 2017-10-16 2019-05-16 東日本旅客鉄道株式会社 Vibration displacement suppressing structure of structure group
JP2019073885A (en) * 2017-10-16 2019-05-16 東日本旅客鉄道株式会社 Vibration displacement suppressing structure of structure group
CN110904865A (en) * 2019-12-13 2020-03-24 广州市第三市政工程有限公司 Bridge reinforcing method and bridge reinforced by applying same
CN111254843A (en) * 2020-01-21 2020-06-09 南京铁道职业技术学院 Bridge pile foundation uplifting structure and construction method thereof

Also Published As

Publication number Publication date
JP3687805B2 (en) 2005-08-24

Similar Documents

Publication Publication Date Title
JP3687805B2 (en) Foundation reinforcement structure of structures
US6922950B2 (en) Top arch overfilled system
JP4794390B2 (en) Pile foundation reinforcement structure and reinforcement method
CN110541354B (en) Single-section prefabricated anti-seismic pier and construction method thereof
AU2004101058A4 (en) Earth Retention and Piling Systems
JPH07300820A (en) Close contact type protective construction method against falling rock and rope/net anchor structure thereof
KR100881944B1 (en) Method for fortifying supporting force of weak land and device for fortifying supporting force of weak land having geotextile installed on piles
US5123777A (en) Construction elements
EP1495191B1 (en) Arch systems
US11629473B2 (en) Multiple friction joint pile system
Freyssinet LECTURE ON PRE-STRESSED CONCRETE: PRINCIPLES & APPLICATIONS. JOINT MEETING WITH SOCIETE DES INGENIEURS CIVILS DE FRANCE (BRITISH SECTION). 17 NOVEMBER 1949.
KR20120100052A (en) Bridge leg correcting method using oil compressure jack and broken parts compensation structure
JP4636478B2 (en) Liquefaction prevention structure
JP3120140B2 (en) Soil liquefaction countermeasure structure
JP7149919B2 (en) Improvement structure and improvement method of existing wharf
JP2008031754A (en) Foundation ground reinforcing structure and foundation ground reinforcing method
KR101020217B1 (en) rock construction structure of using anchor and method thereof
JP3648646B2 (en) Structure liquefaction countermeasure structure
JPH0144852B2 (en)
CN104929101A (en) Bottom expanding-multisection side expanding anti-pull prestressed anchoring gravel pile and construction method
JP3678290B2 (en) High earthquake resistance foundation
JP7019905B2 (en) Pile foundation structure and reinforcement method for existing piles
KR102521965B1 (en) Bridge having reinforced structure for transverse direction and point part
JPH0726569A (en) Pile foundation construction method for structure exposed to partial earth pressure
Rai Review of documents on seismic strengthening of existing buildings

Legal Events

Date Code Title Description
A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20041217

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20050201

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20050331

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20050510

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20050602

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20080617

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110617

Year of fee payment: 6

LAPS Cancellation because of no payment of annual fees