JPH0739669B2 - Structures such as foundation slabs that can be easily repaired by subsidence - Google Patents
Structures such as foundation slabs that can be easily repaired by subsidenceInfo
- Publication number
- JPH0739669B2 JPH0739669B2 JP17320386A JP17320386A JPH0739669B2 JP H0739669 B2 JPH0739669 B2 JP H0739669B2 JP 17320386 A JP17320386 A JP 17320386A JP 17320386 A JP17320386 A JP 17320386A JP H0739669 B2 JPH0739669 B2 JP H0739669B2
- Authority
- JP
- Japan
- Prior art keywords
- foundation slab
- slab
- foundation
- subsidence
- grout
- 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.)
- Expired - Lifetime
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- Working Measures On Existing Buildindgs (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 この発明は、道路や建物の基礎スラブ等、特に杭基礎を
用いていない基礎工法による基礎スラブ等が地盤の不等
沈下により不陸を生じた場合に、その基礎スラブ等のレ
ベルをグラウト注入により平坦に修復する沈下補修工事
を行ない易いように、基礎スラブ等の構築の際に予め沈
下補修に必要な手段を用意したことを特徴とする沈下補
修が容易な基礎スラブ等の構造に関する。[Detailed Description of the Invention] Industrial field of application The present invention relates to a case where a foundation slab of a road or a building, particularly a foundation slab manufactured by a foundation method not using a pile foundation causes uneven landing due to uneven settlement of the ground. In order to facilitate the subsidence repair work for flattening the level of the basic slab etc. by grout injection, the subsidence repair characterized by preparing the means necessary for the subsidence repair in advance when constructing the basic slab etc. Structures such as basic slabs that are easy to install.
従来の技術 従来、道路や建物の基礎スラブ等が地盤の不等沈下によ
り不陸を生じた場合、グラウト注入によりレベル修正を
する沈下補修工法が公知に属し実施されている（例えば
特開昭61-40927号公報記載の沈下補修工法）。2. Description of the Related Art Conventionally, when a foundation slab of a road or a building causes unevenness due to uneven subsidence of the ground, a subsidence repair method for correcting the level by grouting is publicly known and implemented (for example, JP-A-61 -40927 subsidence repair method).
但し、その実施例には成功例もあるが、失敗例も多かっ
た。However, although there were successful cases in the examples, there were also many failed cases.
ちなみに従来、グラウト注入により基礎スラブ等のレベ
ルを平坦に修正する沈下補修工法の成功実施例は、およ
そ第５図に示したように基礎スラブａのみが沈下し、支
持杭ｂに支えられた柱ｃは沈下せず、このために基礎ス
ラブａと地盤ｂとの間に空隙ｅが生じ、この空隙ｅ中に
グラウトｆを注入したような場合である。By the way, in the past, a successful embodiment of the settlement repairing method for flattening the level of the foundation slab and the like by the grout injection is the pillar supported by the support pile b, as shown in FIG. 5, in which only the foundation slab a sinks. In this case, c does not subside, and therefore a space e is formed between the foundation slab a and the ground b, and the grout f is injected into the space e.
本発明が解決しようとする問題点 逆に、従来の失敗例は、およそ第６図に示したように、
柱ｃの下に支持杭がなく、柱ｃと基礎スラブａが共に地
盤ｄの不等沈下により不陸を生じたような場合である。
このように地盤ｄに密着したままの基礎スラブａにコア
ボーリングにより孔をあけ、この孔に注入パイプｇを取
付けてグラウト注入を行なった場合（第７図）、グラウ
トの注入圧力により基礎スラブａを持ち上げる力F1は、
下記の式で表わされる大きさでしかない。Problems to be Solved by the Present Invention On the contrary, the conventional failure example is as shown in FIG.
This is a case in which there is no support pile below the pillar c and both the pillar c and the foundation slab a are unsteady due to uneven subsidence of the ground d.
In this way, when a hole is bored by core boring in the foundation slab a which is still in close contact with the ground d, and the injection pipe g is attached to this hole to perform grout injection (FIG. 7), the foundation slab a is caused by the injection pressure of the grout. The lifting force F 1 is
It is only the size expressed by the following formula.
F1＝Ｓ・Ｐ（kg） 但し、Ｓはコアボーリングされた孔
の断面積、Ｐはグラウト圧（kg/cm2）である。F 1 = S · P (kg) where S is the cross-sectional area of the core-bored hole, and P is the grout pressure (kg / cm 2 ).
つまり、孔の断面積Ｓが注入グラウトの受圧面積でしか
ないため、グラウト圧Ｐを大きくすること以外には目的
を強力に達成する解決策がなかった。例えば直径20cmの
大きさでコアボーリングされた孔の受圧面積Ｓは314cm2
で、グラウト圧Ｐを通常の1.0kg/cm2とすると、基礎ス
ラブａを持ち上げる力F1は314kgでしかなく、基礎スラ
ブａを部分的にもせよ持ち上げることは不可能である。That is, since the cross-sectional area S of the hole is only the pressure receiving area of the injection grout, there has been no solution other than increasing the grout pressure P to strongly achieve the purpose. For example, the pressure receiving area S of the hole bored 20 cm in diameter and cored is 314 cm 2
If the grout pressure P is 1.0 kg / cm 2, which is a normal value, the force F 1 for lifting the basic slab a is only 314 kg, and it is impossible to partially lift the basic slab a.
だからといって、グラウト圧Ｐをむやみに大きくする
と、その結果注入用パイプｇを固定し又は接続するボル
トが破断して吹飛ぶとかの事故が発生し、施工は不可能
であるし甚だ危険という問題点があった。However, if the grout pressure P is excessively increased, as a result, the bolts that fix or connect the injection pipe g may be broken and blown off, which makes the construction impossible and extremely dangerous. there were.
上記特開昭61-40927号公報記載の沈下補修工法の場合に
も正にこの問題点がある。This problem is also true in the case of the subsidence repairing method described in JP-A-61-40927.
結局、基礎スラブを十分大きい力で持ち上げるには、基
礎スラブと地盤との間に注入したグラウトの圧力により
スラブを押上げ得る大きさの力を発生させる空隙を人工
的に設けるか予め用意することが肝要である。After all, in order to raise the foundation slab with a sufficiently large force, artificially provide or prepare in advance a gap between the foundation slab and the ground, which generates a force large enough to push up the slab by the pressure of the grout injected. Is essential.
次に、上記特開昭61-40927号公報に記載された沈下補修
工法の場合、その第１図に記載された基礎スラブは、土
のうで囲まれた中に溜った注入グラウトの上に船のよう
に浮き、その周辺部には注入グラウトが大気開放面をも
っているものと認められるが、現実にこのような沈下補
修工事は実現し得ない。何故なら、注入したグラウトの
圧力は直ちに大気開放面から放出されてしまい、とうて
い基礎スラブを持ち上げる力は発生しないからである。Next, in the case of the subsidence repair method described in JP-A-61-40927, the foundation slab shown in FIG. 1 is a ship slab surrounded by sandbags. It is recognized that the injection grout has an open surface to the atmosphere around it, but in reality such subsidence repair work cannot be realized. This is because the pressure of the injected grout is immediately released from the open surface of the atmosphere, and no force for lifting the foundation slab is generated.
要するに、グラウトの注入による沈下補修工事を実施し
その実効性をあらしめるためには、注入したグラウトが
基礎スラブ等の周辺部から漏れ出さないだけの外周シー
ル部を予め用意することが必要不可欠である。しかもそ
の外周シール部は、基礎スラブ等の外周が地盤に対して
持ち上げられても、シールが切れない構造になっている
ことが肝要であり、こうした条件をいかにして満たすか
が問題点となっている。In short, in order to carry out subsidence repair work by injecting grout and showing its effectiveness, it is essential to prepare in advance a peripheral seal part that does not allow the injected grout to leak from the peripheral part such as the foundation slab. is there. Moreover, it is important that the outer peripheral seal part has a structure in which the seal does not break even if the outer periphery of the foundation slab or the like is lifted up against the ground, and the problem is how to satisfy these conditions. ing.
問題点を解決するための手段 上記従来技術の問題点を解決するための手段として、こ
の発明に係る沈下補修が容易な基礎スラブ等の構造は、
図面の第１図〜第４図に実施例を示しているとおり、 基礎スラブ１等と支持地盤２との間に該基礎スラブ１等
の持ち上げに適切な配置でプレッシャーバック３…を敷
設した。そして、基礎スラブ１等の周辺部には、注入グ
ラウトの漏れ出しを防ぐ外周シール部５を設けた構成と
されている。Means for Solving Problems As means for solving the problems of the above-mentioned conventional technology, a structure such as a foundation slab that is easily subsided according to the present invention,
As shown in FIGS. 1 to 4 of the drawings, pressure backs 3 are laid between the foundation slab 1 and the like and the support ground 2 in an arrangement suitable for lifting the foundation slab 1 and the like. Further, the peripheral slab 1 and the like are provided with an outer peripheral seal portion 5 which prevents the injection grout from leaking out.
なお、具体的実施態様として、注入孔４は、基礎スラブ
１等の構築と同時に、又は構築後に沈下補修の必要に応
じて前記プレッシャーバッグ３の配置のおよそ中間の部
位に設ければ良い。そして、構築後に設ける場合にはコ
アボーリング工法で基礎スラブ１に孔あけするのが好ま
しい。In addition, as a specific embodiment, the injection hole 4 may be provided at a position approximately in the middle of the disposition of the pressure bag 3 at the same time as the construction of the base slab 1 or the like, or after the construction as necessary for subsidence repair. When it is provided after the construction, it is preferable to make a hole in the foundation slab 1 by the core boring method.
また、外周シール部５は、基礎スラブ１等の外周に該基
礎スラブ１とは例えばプラスチックシート６によりが縁
切りして構築された周辺基礎梁10により形成される。Further, the outer peripheral seal portion 5 is formed by a peripheral foundation beam 10 which is constructed by cutting the periphery of the foundation slab 1 and the like with, for example, a plastic sheet 6.
作用 建造物に不等沈下が生じ、沈下した基礎スラブ１及びそ
の上の建物のレベルを修復する必要が生じた場合には、
まず当該沈下補修箇所のプレッシャーバッグ３に水を圧
入し膨張させる。すると、プレッシャーバッグ３の平面
積が基礎スラブ１における注入水圧の受圧面積となって
大きな押上げ力が働く。例えば予め敷設されたプレッシ
ャーバッグ３の平面積が直径が1mであると、このプレッ
シャーバッグ３中に注入した水によって基礎スラブ１を
持ち上げる力F2は、 F2＝Ａ×Ｐ＝7850cm2×1kg/cm2＝7850kgとなる。但し、
Ａはプレッシャーバッグ３による注入水圧の受圧面積
で、直径1mだと7850cm2,Pは水の注入圧で通常1kg/cm2で
ある。Action If the building suffers uneven settlement, and it is necessary to repair the level of the foundation slab 1 and the building above it,
First, water is press-fitted into the pressure bag 3 at the subsidence repair location to expand it. Then, the plane area of the pressure bag 3 becomes a pressure receiving area of the injected water pressure in the base slab 1, and a large pushing force acts. For example, if the flat area of the pressure bag 3 laid in advance has a diameter of 1 m, the force F 2 for lifting the foundation slab 1 by the water injected into the pressure bag 3 is F 2 = A × P = 7850 cm 2 × 1 kg / cm 2 = 7850 kg. However,
A is a pressure receiving area of the injection pressure by the pressure bag 3, 7850cm 2, P and I 1m diameter is usually 1 kg / cm 2 in injecting pressure of water.
上述のように約８トンに増大された力F2によれば、基礎
スラブ１は部分的にもせよ十分に持ち上げられる。そし
て、前述のようにプレッシャーバッグ３が膨張するにし
たがい、基礎スラブ１等とその支持地盤２との間には空
隙７が形成される（第４図）。With the force F 2 increased to about 8 tonnes as described above, the foundation slab 1 is partially, if any, lifted. Then, as the pressure bag 3 expands as described above, a gap 7 is formed between the base slab 1 and the like and the supporting ground 2 thereof (FIG. 4).
そくで次に、予め基礎スラブ１に設けてあるか又は必要
に応じて設けた注入孔４を通じて前記空隙７中にグラウ
トを注入する。この間隙７により基礎スラブ１にはプレ
ッシャーバッグ３よりも一層大きな注入グラウト圧の受
圧面積が形成されている。よって、空隙７に注入したグ
ラウトの圧力によって基礎スラブ１を持ち上げる力F
3は、グラウト注入圧が通常1kg/cm2であるとしても前記
プレッシャーバッグ３による力F2よりもはるかに大きい
から、基礎スラブ１は十分に持ち上げられ、レベルを平
坦に修復することが容易に可能である。Then, grout is injected into the void 7 through an injection hole 4 which is provided in the base slab 1 in advance or is provided as needed. Due to this gap 7, a larger pressure receiving area for the injection grout pressure is formed in the base slab 1 than in the pressure bag 3. Therefore, the force F for lifting the foundation slab 1 by the pressure of the grout injected into the void 7
3 is much larger than the force F 2 by the pressure bag 3 even if the grout injection pressure is usually 1 kg / cm 2 , so that the foundation slab 1 is sufficiently lifted and the level can be easily restored to a flat level. It is possible.
そこで、注入グラウトにより基礎レベル１を持ち上げる
ようになった時点でプレッシャーバッグ３の膨脹（水の
注入ないし水圧の保持）は停止させ、もって基礎スラブ
１の持ち上げは注入グラウトによる力F3に盛り替える。
そして、収縮したプレッシャーバッグ３の場所にもグラ
ウトを注入してさらに基礎スラブ１のレベルを平坦に修
正する。Therefore, when the foundation level 1 is lifted by the injection grout, the expansion of the pressure bag 3 (injection of water or holding of water pressure) is stopped, and thus the lifting of the foundation slab 1 is changed to the force F 3 by the injection grout. .
Then, grout is also injected into the location of the contracted pressure bag 3 to further correct the level of the basic slab 1.
なお、前記グラウト注入が基礎スラブ１の周辺部で行な
われ基礎スラブ１が持ち上げられた場合にも、外周シー
ル部５によって注入グラウトの周辺部への漏れ出しはき
っちり防止される。よって基礎スラブ１のレベルの修復
は周辺部においても確実に容易に可能である。Even when the grout injection is performed in the peripheral portion of the base slab 1 and the base slab 1 is lifted, the outer peripheral seal portion 5 prevents the injection grout from leaking to the peripheral portion. Therefore, the level of the foundation slab 1 can be surely and easily repaired even in the peripheral portion.
また、このようなレベル修復が行なわれた後に、再び基
礎スラブ１等が沈下を生じた場合は、再度プレッシャー
バッグ３を水により膨張させることによりくり返し基礎
スラブ１等の沈下補修工事を上述したと同様の手順で容
易に確実に実施できる。Further, when the foundation slab 1 or the like subsides again after such level restoration is performed, the subsidence repair work of the foundation slab 1 or the like is repeated by inflating the pressure bag 3 again with water. It can be easily and surely performed by the same procedure.
実施例 次に、図面の第１図〜第４図に示したこの発明の実施例
を説明する。Embodiment Next, an embodiment of the present invention shown in FIGS. 1 to 4 of the drawings will be described.
第１図と第２図に示した沈下補修が容易な基礎スラブの
場合、該基礎スラブ１を構築するにあたり、予め基礎ス
ラブ１の下、即ち支持地盤２（改良地盤２＝第３図）と
の間にプレッシャーバッグ３…が敷設されている。プレ
ッシャーバッグ３…は、当該基礎スラブ１を持ち上げる
のに適切な配置で多数敷設されている。プレッシャーバ
ッグ３は、高張力のゴム又はプラスチック製の袋であ
り、その大きさは、平面形状において直径が1m位の円形
とされている。このプレッシャーバッグ３…の上に基礎
スラブ１のコンクリートが打設され、各バッグそれぞれ
の注水口3aは基礎スラブ１上に突出されている。In the case of the foundation slab shown in FIG. 1 and FIG. 2 which is easy to repair by subsidence, when the foundation slab 1 is constructed, the foundation slab 1 is previously formed, that is, the supporting ground 2 (improved ground 2 = FIG. 3). A pressure bag 3 is laid between the two. A large number of pressure bags 3 are laid in an arrangement suitable for lifting the basic slab 1. The pressure bag 3 is a high-strength rubber or plastic bag, and its size is a circle having a diameter of about 1 m in a plan view. Concrete of the foundation slab 1 is placed on the pressure bags 3 ..., and the water injection port 3a of each bag is projected onto the foundation slab 1.
したがって、基礎スラブ１に不等沈下が生じ、沈下した
基礎スラブ１やその上の建物のレベルを修復する必要が
生じた場合には、まず当該沈下補修箇所のプレッシャー
バッグ３の注水口3aに図示省略した注水ポンプの注水管
を接続し、例えば1kg/cm2位の加圧水を圧入する。Therefore, if uneven subsidence occurs in the foundation slab 1 and it becomes necessary to restore the level of the submerged foundation slab 1 and the building above it, first illustrate the water injection port 3a of the pressure bag 3 at the subsidence repair location. Connect the water injection pipe of the omitted water injection pump and pressurize, for example, 1 kg / cm 2 of pressurized water.
すると、プレッシャーバッグ３が水圧によって膨張され
るので、直径が1m位のプレッシャーバッグ３の平面積が
水圧により基礎スラブ１を押し上げる受圧面積となる。
この水圧によって基礎スラブ１を持ち上げる力F2は、 F2＝Ａ×Ｐ＝7850cm2×1kg/cm2＝7850kgぐらいになる。
このように増大された力F2によれば基礎スラブ１は十分
に持ち上げられる。Then, since the pressure bag 3 is inflated by water pressure, the plane area of the pressure bag 3 having a diameter of about 1 m becomes a pressure receiving area for pushing up the base slab 1 by water pressure.
Force F 2 to lift the base slab 1 by the water pressure will about F 2 = A × P = 7850cm 2 × 1kg / cm 2 = 7850kg.
With the force F 2 thus increased, the foundation slab 1 is sufficiently lifted.
かくして、プレッシャーバッグ３が膨脹し基礎スラブ１
が持ち上げられるにしたがい、基礎スラブ１とその支持
地盤２との間には必然的に空隙７が形成される（第４
図）。Thus, the pressure bag 3 is inflated and the foundation slab 1 is expanded.
A space 7 is inevitably formed between the foundation slab 1 and its supporting ground 2 as the vehicle is lifted (fourth
Figure).
つまり、プレッシャーバッグ３は、注水により基礎スラ
ブ１とその支持地盤２との間に空隙７を形成するための
最も有効的な手段として、予め基礎スラブ１の打設施工
時にその下に敷設されているのである。また、プレッシ
ャーバッグ３…の配置は、後に述べるように空隙７に注
入したグラウトの圧力により基礎スラブ１を押し上げる
力を発生させるに足る広さ（注入グラウト圧の受圧面
積）を確保するという考え方に基いて設計し敷設されて
いる。That is, the pressure bag 3 is previously laid under the foundation slab 1 at the time of placing construction as the most effective means for forming the gap 7 between the foundation slab 1 and its supporting ground 2 by water injection. Is there. In addition, the arrangement of the pressure bags 3 is based on the idea that a sufficient space (a pressure receiving area for the injection grout pressure) is generated to generate a force to push up the foundation slab 1 by the pressure of the grout injected into the void 7, as described later. It is designed and laid based on it.
沈下した基礎スラブ１の持ち上げと同時にそのレベル修
正も各プレッシャーバッグ３…へ注入した加圧水の注入
量の調節によりシステム的に自在に行なうことができ
る。At the same time as raising the submerged foundation slab 1, its level can be corrected systematically by adjusting the injection amount of the pressurized water injected into each pressure bag 3.
基礎スラブ１にはまた、上記プレッシャーバッグ３…の
配置のおよそ中間の部位に１個ずつの割合で、口径が20
cm位のグラウト注入用の注入孔４…が、該基礎スラブ１
の構築施工時に例えば円筒枠を設置する等々の方法で予
め設けられている。The foundation slab 1 also has a diameter of 20 at a ratio of about one in the middle of the arrangement of the pressure bags 3 ...
The injection hole 4 for injecting grout of about cm is the basic slab 1
It is provided in advance by a method such as installing a cylindrical frame at the time of construction construction.
したがって、上述したようにプレッシャーバッグ３に注
水して基礎スラブ１を持ち上げて空隙７を形成し、かつ
レベルを修正した後には、この注入孔４にグラウト注入
用パイプ９を接続し（第４図）、図示省略のグラウトポ
ンプにより例えば1kg/cm2位に加圧したグラウトを空隙
７中に注入する。注入グラウトが空隙７中に充満する
と、基礎スラブ１の空隙平面積の前部が注入グラウト圧
の受圧面積となる。このため、前記プレッシャーバッグ
３による押上げ力よりも一層大きな力で基礎スラブ１を
持ち上げる。Therefore, as described above, after water is poured into the pressure bag 3 to raise the foundation slab 1 to form the void 7 and the level is corrected, the grout injection pipe 9 is connected to the injection hole 4 (see FIG. 4). ), For example, grout pressurized to about 1 kg / cm 2 by a grout pump (not shown) is injected into the void 7. When the pouring grout fills the space 7, the front part of the plane area of the space of the base slab 1 becomes the pressure receiving area of the pouring grout pressure. Therefore, the foundation slab 1 is lifted with a force larger than the pushing force of the pressure bag 3.
そこで、この段階でプレッシャーバッグ３への注水ない
し注入水圧の保持を停止し、プレッシャーバッグ３は収
縮させ、その結果生ずる空隙もグラウトで埋めて基礎ス
ラブ１の持ち上げをグラウト圧による力に盛り替える。
また、このグラウト注入によっても基礎スラブ１のレベ
ル修正をシステム的に自在に調節制御することができ
る。Therefore, at this stage, the holding of the water injection or the injection water pressure to the pressure bag 3 is stopped, the pressure bag 3 is contracted, and the resulting void is filled with grout, and the lifting of the base slab 1 is replaced with the force by the grout pressure.
Further, the level correction of the base slab 1 can also be systematically adjusted and controlled by this grout injection.
ところで、上記基礎スラブ１の全外周部には、この基礎
スラブ１とはプラスチックシート６（第３図）により縁
切りされた周辺基礎梁10を構築し、もって注入グラウト
の漏れ出しを防ぐ外周シール部５が形成されている。By the way, in the entire outer peripheral portion of the basic slab 1, a peripheral basic beam 10 is constructed, which is cut off from the basic slab 1 by a plastic sheet 6 (Fig. 3), and thus an outer peripheral sealing portion for preventing leakage of the injection grout. 5 is formed.
その詳細は第３図に示したように、基礎スラブ１とその
支持地盤２及び周辺基礎梁10との境界には、各々の打設
施工時に予めプラスチックシート６を敷設（又は介在）
し、もって三者の完全な縁切りが行なわれている。As shown in FIG. 3 for details, at the boundary between the foundation slab 1, its supporting ground 2 and the surrounding foundation beam 10, a plastic sheet 6 is laid (or interposed) in advance at the time of each construction.
However, the three parties are completely cut off.
したがって、特に基礎スラブ１の週辺部に位置する注入
孔４を通じてグラウトを注入しレベル修正を行なった場
合に、同基礎スラブ１の外方に流動したグラウトは、周
辺シール部５のところで完全にせき止められ外部へ漏れ
出すことは確実に防止される。よって、注入グラウトの
圧力は全部有効に基礎スラブ１を持ち上げる力として作
用し、基礎スラブ１の沈下補修及びレベル修正を確実に
行なわしめるのである。この目的のために、周辺シール
部５の高さＨ（第３図）は、沈下補修のため基礎スラブ
１が持ち上げられてもシールが切れない大きさ、例えば
少なくともＨは50cm位が確保されている。Therefore, in particular, when the grout is injected through the injection hole 4 located on the week side of the foundation slab 1 and the level is corrected, the grout that has flowed to the outside of the foundation slab 1 is completely discharged at the peripheral seal portion 5. It is surely prevented from being dammed and leaking to the outside. Therefore, all the pressure of the injection grout effectively acts as a force for lifting the foundation slab 1, so that the settlement of the foundation slab 1 and the level correction can be surely performed. For this purpose, the height H (FIG. 3) of the peripheral seal portion 5 is such that the seal does not break even if the foundation slab 1 is lifted for subsidence repair, for example, at least H of about 50 cm is secured. There is.
なお、プラスチックシート６は、基礎スラブ１と支持地
盤２とを縁切りするので、基礎スラブ１の持ち上げに抵
抗が少なく持ち上げ易くなるという効果も奏する。Since the plastic sheet 6 cuts the edge between the base slab 1 and the support ground 2, there is also an effect that the base slab 1 is easily lifted with less resistance.
第２の実施例 上記第１実施例の場合、グラウトの注入孔４は基礎スラ
ブ１の構築施工と同時に形成されているが、この限りで
はない。予め注入孔４を設けておくと、後で孔あけ加工
の手間を要さず、その分沈下補修工事を容易に迅速に行
なえるけれども、基礎スラブ１の構築後に、沈下補修の
必要が生じた場合にその都度孔あけして注入孔４を設け
てもよい。この時の孔あけにはコアボーリング工法の実
施が有効的である。Second Embodiment In the case of the first embodiment described above, the grout injection hole 4 is formed at the same time as the construction and construction of the base slab 1, but the present invention is not limited to this. If the injection hole 4 is provided in advance, it is possible to easily and swiftly perform subsidence repair work without requiring the work of drilling later, but after the foundation slab 1 was constructed, subsidence repair was necessary. In some cases, the injection hole 4 may be provided by drilling each time. The core boring method is effective for drilling holes at this time.
本発明が奏する効果 以上に実施例と併せて詳述したとおりであって、この発
明に係る沈下補修が容易な基礎スラブ等の構造の場合、
沈下補修の工事に際しては何の下工作も無用で、いきな
りプレッシャーバッグ３へ注水することで基礎スラブ１
を持ち上げ空隙７を形成することができ、かつ基礎スラ
ブ１等のレベル修正も行なうことができる。そして、空
隙７にグラウトを注入することにより基礎スラブ１等の
持ち上げをプレッシャーバッグ３の水圧からグラウト圧
にスムーズに盛り替えることができ、かつ基礎スラブ１
のレベル修正も行なうことができる。Effects of the present invention As described in detail in conjunction with the above embodiments, in the case of a structure such as a foundation slab that is easy to perform subsidence repair according to the present invention,
No foundation work is required for subsidence repair work, and suddenly water is poured into the pressure bag 3 so that the foundation slab 1
Can be lifted to form the void 7, and the level of the base slab 1 and the like can be corrected. Then, by injecting grout into the void 7, the lifting of the foundation slab 1 and the like can be smoothly changed from the water pressure of the pressure bag 3 to the grout pressure, and the foundation slab 1
You can also modify the level of.
つまり基礎スラブ１等の沈下補修工事が極めて簡単，確
実にでき、手数がかからないのである。よって、基礎ス
ラブ１等の沈下及び補修がさほど苦にならない。In other words, the subsidence repair work of the foundation slab 1 etc. is extremely easy and reliable, and it does not take time. Therefore, subsidence and repair of the foundation slab 1 etc. is not so difficult.
また、グラウト注入時、特に基礎スラブ１等の周辺部に
グラウトを注入した時にも決してグラウトの漏れ出しを
生じないから、沈下補修の実効性を確実にあらしめるの
である。In addition, since the grout never leaks when the grout is injected, particularly when the grout is injected into the peripheral portion of the foundation slab 1 or the like, the effectiveness of the subsidence repair can be surely shown.
第１図と第２図はこの発明に係るスラブ等の構造を示し
た平面図とII−II矢視断面図，第３図は第２図のIII部
拡大図，第４図は沈下補修の施工説明図，第５図と第６
図は従来の沈下補修の説明図，第７図は従来の作用説明
図である。1 and 2 are a plan view and a sectional view taken along the line II-II showing the structure of a slab or the like according to the present invention, FIG. 3 is an enlarged view of a portion III of FIG. 2, and FIG. Construction explanatory drawing, 5 and 6
FIG. 7 is an explanatory view of conventional subsidence repair, and FIG. 7 is an explanatory view of conventional operation.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 岡田 克也 東京都江東区南砂２丁目５番14号 株式会 社竹中工務店技術研究所内 (72)発明者 加倉井 正昭 東京都江東区南砂２丁目５番14号 株式会 社竹中工務店技術研究所内 (72)発明者 杉山 靖 東京都中央区銀座８丁目21番１号 株式会 社竹中工務店東京本店内 (72)発明者 黒岩 博之 東京都中央区銀座８丁目21番１号 株式会 社竹中工務店東京本店内 (72)発明者 山口 育雄 東京都江東区南砂２丁目５番14号 株式会 社竹中工務店技術研究所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Katsuya Okada 2-5-14 Minamisuna, Koto-ku, Tokyo Inside Takenaka Corporation Technical Research Institute (72) Inventor Masaaki Kakai 2-chome, Minamisuna, Koto-ku, Tokyo No. 14 Incorporated Takenaka Corporation Technical Research Institute (72) Inventor Yasushi Sugiyama 8-21-1 Ginza, Chuo-ku, Tokyo Incorporated Takenaka Corporation Tokyo Main Store (72) Inventor Hiroyuki Kuroiwa Ginza, Chuo-ku, Tokyo 8-21-1, Takenaka Corporation Tokyo Main Store (72) Inventor Ikuo Yamaguchi 2-5-14, Minamisuna, Koto-ku, Tokyo Takenaka Corporation Technical Research Institute
Claims (5)
間に該基礎スラブ（１）等の持ち上げに適切な配置でプ
レッシャーバッグ（３）…を敷設してあり、基礎スラブ
（１）等の周辺部には注入グラウトの漏れ出しを防ぐ外
周シール部（５）が設けられていることを特徴とする沈
下補修が容易な基礎スラブ等の構造。1. A pressure bag (3) is laid between the foundation slab (1) and the like and a supporting ground (2) in a position suitable for lifting the foundation slab (1), and the foundation slab (3) is laid. A structure such as a foundation slab which is easily repaired by subsidence, which is provided with an outer peripheral seal portion (5) for preventing leakage of the injection grout in the peripheral portion such as 1).
ブ（１）には、沈下補修の必要に応じて注入孔（４）が
プレッシャーバッグ（３）の配置のおよそ中間の部位に
設けられていることを特徴とする沈下補修が容易な基礎
スラブ等の構造。2. The foundation slab (1) according to claim 1 is provided with an injection hole (4) at a position approximately in the middle of the arrangement of the pressure bag (3) according to the necessity of subsidence repair. A structure such as a foundation slab that is easily repaired by subsidence.
（４）はコアボーリング工法により孔あけされているこ
とを特徴とする沈下補修が容易な基礎スラブ等の構造。3. A structure such as a foundation slab that is easily repaired by sinking, characterized in that the injection hole (4) described in claim 2 is bored by a core boring method.
ル部（５）は、基礎スラブ（１）等の外周に該基礎スラ
ブ（１）とは縁切りして構築された周辺基礎梁（10）に
より形成されていることを特徴とする沈下補修が容易な
基礎スラブ等の構造。4. The outer peripheral seal portion (5) according to claim 1 is a peripheral foundation beam () formed on the outer periphery of the foundation slab (1) by cutting the periphery of the foundation slab (1). A structure such as a foundation slab that is easily repaired by subsidence characterized by being formed by 10).
た外周シール部（５）は、基礎スラブ（１）等の外周に
該基礎スラブ（１）とはプラスチックシート（６）によ
り縁切りして構築された周辺基礎梁（10）により形成さ
れていることを特徴とする沈下補修が容易な基礎スラブ
等の構造。5. The outer peripheral seal part (5) according to claim 1 or 4 is provided with a plastic sheet (6) on the outer periphery of the base slab (1) or the like. A structure such as a foundation slab that is easily repaired by subsidence, characterized by being formed by peripheral foundation beams (10) constructed by cutting edges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17320386A JPH0739669B2 (en) | 1986-07-23 | 1986-07-23 | Structures such as foundation slabs that can be easily repaired by subsidence |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17320386A JPH0739669B2 (en) | 1986-07-23 | 1986-07-23 | Structures such as foundation slabs that can be easily repaired by subsidence |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6332025A JPS6332025A (en) | 1988-02-10 |
| JPH0739669B2 true JPH0739669B2 (en) | 1995-05-01 |
Family
ID=15956022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17320386A Expired - Lifetime JPH0739669B2 (en) | 1986-07-23 | 1986-07-23 | Structures such as foundation slabs that can be easily repaired by subsidence |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0739669B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2019101315B4 (en) * | 2019-08-26 | 2020-06-18 | Wainfield Pty. Ltd. | A method and apparatus |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5941698B2 (en) * | 2012-02-21 | 2016-06-29 | 金子 裕治 | Method for repairing inclined structures |
| US10047534B2 (en) * | 2016-05-31 | 2018-08-14 | Upcon Corporation | Method for modifying concrete slab on subsided ground |
| JP6826864B2 (en) * | 2016-11-04 | 2021-02-10 | 株式会社竹中工務店 | Restoration method of existing foundation and restoration structure of existing foundation |
| AU2017386879B2 (en) * | 2016-12-27 | 2022-06-30 | Upcon Corporation | Method for correcting concrete plate tilting on subsided ground |
-
1986
- 1986-07-23 JP JP17320386A patent/JPH0739669B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2019101315B4 (en) * | 2019-08-26 | 2020-06-18 | Wainfield Pty. Ltd. | A method and apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6332025A (en) | 1988-02-10 |
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