JPH0913344A - Deformation preventive method of double closing dike - Google Patents
Deformation preventive method of double closing dikeInfo
- Publication number
- JPH0913344A JPH0913344A JP16058195A JP16058195A JPH0913344A JP H0913344 A JPH0913344 A JP H0913344A JP 16058195 A JP16058195 A JP 16058195A JP 16058195 A JP16058195 A JP 16058195A JP H0913344 A JPH0913344 A JP H0913344A
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- JP
- Japan
- Prior art keywords
- steel sheet
- ground
- sheet pile
- sheet piles
- existing
- 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.)
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、仮締切、河川堤防、護
岸、導流堤、水門等の既設鋼矢板二重締切堤防の変形防
止工法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for preventing deformation of an existing steel sheet pile double cut-off dike such as a temporary cutoff, a river dike, a revetment, a dike, and a sluice.
【０００２】[0002]
【従来の技術】堤防を構成する一重締切あるいは二重締
切が何らかの原因で大きく変形したり、締切部材として
利用している鋼矢板、鋼管矢板等の発生応力が許容応力
度あるいは降伏応力度を越えて全体として安定しなくな
った場合、一般的には以下の方法が用いられる。2. Description of the Related Art A single cutoff or a double cutoff that constitutes a bank is greatly deformed for some reason, or the stress generated in steel sheet piles, steel pipe sheet piles, etc. used as shutoff members exceeds the allowable stress level or yield stress level. If it becomes unstable as a whole, the following method is generally used.
【０００３】その１は、締切の前面側あるいは背面側を
捨石あるいは土砂等を押さえ、全体の安定性を増大させ
るものであり、その２は、締切の前面側あるいは背面側
に新規に締切を構築するものであり、その３は既設構造
物内外に鋼管矢板等を増打ちして、全体としての剛性を
高めて安定性を増大させる。The first is to increase the stability of the whole by increasing the stability of rubble or earth and sand on the front side or the back side of the deadline, and the second is to construct a new deadline on the front side or the back side of the deadline. The third is to increase the rigidity as a whole by increasing the steel pipe sheet pile and the like inside and outside the existing structure to increase the stability.
【０００４】[0004]
【発明が解決しようとする課題】前記その１の押さえ盛
土あるいはその２の新規の締切を構築する場合には、既
設の締切を有効利用することが難しく、無駄が多くな
る。When constructing the above-mentioned 1 embankment embankment or the 2 new deadline, it is difficult to effectively use the existing deadline, resulting in a lot of waste.
【０００５】また、従来の押さえ盛土等の補強方法で
は、施工期間、施工後の原地盤の強度増加のために一定
期間放置する必要があり、締切としての使用に時間がか
かるものである。In addition, in the conventional method of reinforcing the embankment, it is necessary to leave it for a certain period in order to increase the strength of the original ground after the construction, and it takes time to use it as a deadline.
【０００６】さらに、施工に際して重機の搬入が困難な
場合も多く、新規の締切あるいは押さえ盛土等を行うの
に多くの用地もしくはスペースを必要とする。Further, it is often difficult to carry in heavy equipment during construction, and a lot of land or space is required to carry out a new deadline or holding embankment.
【０００７】本発明の目的は前記従来例の不都合を解消
し、既設の構造物自体が持っているあるいは残っている
抵抗能力を可能な限り活用して合理的な施工ができ、ま
た、短時間かつ軽量の機械で施工することも可能であ
り、さらに、新規用地やスペースも不要ですむ二重締切
堤防の変形防止工法を提供することにある。The object of the present invention is to eliminate the inconveniences of the above-mentioned conventional example, to make a rational construction by utilizing the resistance capacity of the existing structure itself or remaining as much as possible, and for a short time. It is also possible to construct with a lightweight machine, and to provide a method for preventing deformation of a double cutoff dike, which does not require new land or space.
【０００８】[0008]
【課題を解決するための手段】本発明は前記目的を達成
するため、第１に、二重締切堤防内の中詰土あるいは鋼
矢板や鋼管矢板に挟まれた原地盤の部分を地盤改良する
こと、第２に、さらに、二重締切堤防の前面あるいは背
面の原地盤の部分の必要個所を地盤改良すること、第３
に、二重締切堤防の既設の締切鋼矢板や鋼管矢板の外側
に新規の鋼矢板もしくは鋼管矢板を打設し、既設締切鋼
矢板等間あるいは既設締切鋼矢板等と新規の鋼矢板等間
もしくはその両方の原地盤の部分を地盤改良すること、
第４に、さらに、既設の締切鋼矢板等と新規の鋼矢板等
のそれぞれの頭部をコーピングで剛結することを要旨と
するものである。[Means for Solving the Problems] To achieve the above object, firstly, the ground improvement is performed on the middle soil in the double cut-off dike or the portion of the original ground sandwiched between steel sheet piles and steel pipe sheet piles. Secondly, further improvement of the ground in the necessary parts of the original ground on the front or back of the double cut-off wall, the third
A new steel sheet pile or steel pipe sheet pile on the outside of the existing cut-off steel sheet pile or steel pipe sheet pile of the double cut-off levee, and between the existing cut-off steel sheet piles or between the existing cut-off steel sheet piles and the new steel sheet piles, or Ground improvement of both original ground parts,
Fourthly, the gist of the present invention is that the heads of the existing cut-off steel sheet pile and the new steel sheet pile are rigidly connected by coping.
【０００９】[0009]
【作用】請求項１および請求項２記載の本発明によれ
ば、二重締切の鋼矢板（鋼管矢板）が設計上十分な耐力
を有している場合であり、原地盤が軟弱な場合等でも数
〜数10kgf ／cm2 の強度まで改良可能なので、地盤とし
ては飛躍的な改良効果が期待できる。According to the present invention as set forth in claims 1 and 2, it is a case where a double cut-off steel sheet pile (steel pipe sheet pile) has a sufficient proof strength in design, and the original ground is weak, etc. However, the strength can be improved up to several to several tens of kgf / cm 2 , so a dramatic improvement effect can be expected for the ground.
【００１０】また、さらに、二重締切堤防の前面あるい
は背面の原地盤の部分の必要個所を地盤改良することに
より既設の二重締切を活用でき、全体としては経済的で
省スペースの構造にできる。Further, the existing double deadline can be utilized by improving the ground in the necessary portion of the original ground portion on the front surface or the rear surface of the double cutoff dike, so that an economical and space-saving structure can be obtained as a whole. .
【００１１】請求項３記載の本発明によれば、二重締切
の鋼矢板（鋼管矢板）が設計上十分な耐力を有していな
い場合であり、二重締切の堤防の既設の締切鋼矢板や鋼
管矢板の外側に新規の鋼矢板もしくは鋼管矢板を打設し
てこれを締切部材として利用し、既設締切鋼矢板等間あ
るいは既設締切鋼矢板等と新規の鋼矢板等間もしくはそ
の両方の原地盤の部分を地盤改良することで原地盤が軟
弱な場合等でも飛躍的な改良効果が期待できる。According to the third aspect of the present invention, the double cut-off steel sheet pile (steel pipe sheet pile) does not have sufficient proof strength by design, and the existing cut-off steel sheet pile for the double cut-off levee is provided. A new steel sheet pile or a steel pipe sheet pile on the outside of the steel pipe sheet pile and use this as a closing member, and between the existing closed steel sheet piles or between the existing closed steel sheet piles and the new steel sheet piles or both By improving the ground part, a dramatic improvement effect can be expected even when the original ground is soft.
【００１２】請求項４記載の本発明によれば、前記作用
に加えて、既設の締切鋼矢板等と新規の鋼矢板等のそれ
ぞれの頭部をコーピングで剛結することで、既設の締切
鋼矢板等と新規の鋼矢板等を一体とした締切として機能
させることができる。According to the present invention of claim 4, in addition to the above-mentioned action, the existing cut-off steel sheet piles or the like and the new steel sheet piles or the like are rigidly connected by copings to the heads of the existing cut-off steel sheet piles or the like. The sheet pile and the new steel sheet pile can be made to function as a deadline.
【００１３】[0013]
【実施例】以下、本発明の実施例を図面について詳細に
説明する。図１は本発明の二重締切堤防の変形防止工法
の第１実施例を示す縦断側面図で、図中１は鋼矢板２や
鋼管矢板による二重締切の堤防を示す。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a vertical cross-sectional side view showing a first embodiment of a deformation preventing construction method for a double cut-off levee of the present invention. In FIG.
【００１４】本実施例は二重締切の堤防１内の中詰土
（砂）３あるいは鋼矢板２や鋼管矢板に挟まれた原地盤
４（例えば砂礫層の上に粘土層があるような）の部分を
地盤改良による改良体５とする。なお、地盤改良は全体
あるいは一定ピッチで行う。In this embodiment, the soil (sand) 3 in the double cut-off dyke 1 or the ground 4 sandwiched between the steel sheet piles 2 and the steel pipe sheet piles (for example, a clay layer on a gravel layer). The portion is designated as the improved body 5 by ground improvement. In addition, ground improvement is carried out entirely or at a fixed pitch.
【００１５】この地盤改良の方法としては、攪拌翼で機
械的に混合させ、地盤強度を増加させる原位置攪拌混合
あるいは置換工法や高圧噴射で固化材を原地盤で攪拌混
合させる高圧噴射置換工法等種々考えられるが、陸上、
海上あるいは使用工法の機械の施工上の制約で使いわけ
る。As the method for improving the ground, in-situ stirring mixing or replacement method for mechanically mixing with a stirring blade to increase the ground strength, or high-pressure injection replacement method for stirring and mixing the solidified material by high-pressure injection on the original ground, etc. There are various possibilities, but on land,
It is used depending on the construction restrictions of the machine on the sea or in the method of use.
【００１６】原位置攪拌混合あるいは置換工法は原地盤
を短期間で増強することが可能であり、高圧噴射置換工
法等は比較的軽量の機械で施工することができる。ま
た、原地盤にペーパードレーン、捨石等がある場合には
ボーリング削孔等でケーシングを挿入して施工可能なジ
ェットグラウト工法等が適する。The in-situ agitation mixing or replacement method can strengthen the original ground in a short period of time, and the high-pressure injection replacement method and the like can be carried out by a relatively lightweight machine. Also, if there is paper drain, rubble, etc. on the ground, a jet grout method, etc., which can be installed by inserting a casing by boring, etc. is suitable.
【００１７】本実施例は二重締切の鋼矢板２や鋼管矢板
が設計上十分な耐力を有している場合であり、原地盤４
が軟弱な場合等でも数〜数10kgf ／cm2 の強度まで改良
体５の施工が可能なので地盤としては飛躍的な改良効果
が期待できる。In this embodiment, the steel sheet pile 2 and the steel pipe sheet pile having a double deadline have sufficient proof strength in terms of design.
Even if the soil is soft, it is possible to construct the improved body 5 up to a strength of several to several tens of kgf / cm 2 , so a dramatic improvement effect can be expected for the ground.
【００１８】さらに、必要に応じて二重締切堤防１の前
面あるいは背面の原地盤の部分の必要個所を地盤改良し
て改良体５としてもよい。Further, if necessary, the required portion of the original ground portion on the front surface or the back surface of the double cutoff dike 1 may be improved to form the improved body 5.
【００１９】図２、図３は本発明の第２実施例を示すも
ので、二重締切堤防１の既設の締切鋼矢板２や鋼管矢板
の外側に新規の鋼矢板６もしくは鋼管矢板を打設し、既
設締切鋼矢板２等間すなわち、二重締切堤防１内あるい
は既設締切鋼矢板２等と新規の鋼矢板６等間もしくはそ
の両方の原地盤４の部分を地盤改良して改良体５する。
（図示の例は既設締切鋼矢板２等と新規の鋼矢板６等間
を地盤改良した場合である。）2 and 3 show a second embodiment of the present invention, in which a new steel sheet pile 6 or steel pipe sheet pile is placed outside the existing cut-off steel sheet pile 2 or steel pipe sheet pile of the double cut-off bank 1. Then, between the existing cut-off steel sheet piles 2, etc., that is, inside the double cut-off levee 1, or between the existing cut-off steel sheet piles 2 etc. and the new steel sheet pile 6 etc., or both of them, the ground 4 is improved to form the improved body 5. .
(The illustrated example is a case where the ground between the existing cut-off steel sheet pile 2 and the new steel sheet pile 6 is improved.)
【００２０】地盤改良工法として高圧ジェット噴射混合
処理工法のうち、グラウト・空気噴射方式（ＪＳＧ工
法）を施工場所が陸域より離れている場合で行うには、
図４に示すようにセメントサイロ８、水タンク９、グラ
ウトミキサー10、超高圧ポンプ11などの固化材練混ぜプ
ラントを台船７に積込んで、ＪＳＧマシーン12により施
工を行う。図中13はサンドポンプ、14はＪＳＧマシーン
12を吊支するクレーンである。Among the high-pressure jet injection mixing treatment methods as the ground improvement method, the grout / air injection method (JSG method) is performed when the construction site is far from the land area.
As shown in FIG. 4, a solidifying material mixing plant such as a cement silo 8, a water tank 9, a grout mixer 10, and an ultrahigh pressure pump 11 is loaded on the berth 7, and construction is performed by the JSG machine 12. In the figure, 13 is a sand pump and 14 is a JSG machine.
It is a crane that suspends 12 pieces.
【００２１】そして、既設の締切鋼矢板２等と新規の鋼
矢板６等との一体化を図るため、それぞれの頭部を鉄筋
コンクリートもしくは鋼材によるコーピング15で剛結し
た。このコーピング15には開口15ａ，15ｂを設け、将来
の中詰土３の沈下、地盤改良施工時のスライム処理用と
して使用するが、原地盤改良時に発生するスライム等は
施工済みの区域に原地盤４とコーピング15との隙間部分
に充填し、埋戻す。Then, in order to integrate the existing cut-off steel sheet pile 2 and the like with the new steel sheet pile 6 and the like, the respective heads are rigidly connected by a coping 15 made of reinforced concrete or steel material. This coping 15 has openings 15a and 15b to be used for subsidence of the middle soil 3 in the future and for slime treatment at the time of ground improvement construction. Fill the gap between 4 and coping 15 and backfill.
【００２２】[0022]
【発明の効果】以上述べたように本発明の二重締切堤防
の変形防止工法は、二重締切堤防として既設の構造物自
体が持っているあるいは残っている抵抗能力を可能な限
り活用して合理的な施工ができ、また、短時間かつ軽量
の機械で施工することも可能であり、さらに、新規用地
やスペースも不要ですむものである。As described above, the method for preventing deformation of a double cut-off levee of the present invention utilizes the existing resistance capacity of the existing structure itself as the double cut-off levee as much as possible. Reasonable construction is possible, and construction can be done in a short time and with a lightweight machine, and no new land or space is required.
【図１】本発明の二重締切堤防の変形防止工法の第１実
施例を示す縦断側面図である。FIG. 1 is a vertical sectional side view showing a first embodiment of a deformation preventing construction method for a double cut-off dike according to the present invention.
【図２】本発明の二重締切堤防の変形防止工法の第２実
施例を示す縦断側面図である。FIG. 2 is a vertical cross-sectional side view showing a second embodiment of a deformation preventing construction method for a double cut-off levee of the present invention.
【図３】本発明の二重締切堤防の変形防止工法の第２実
施例を示す平面図である。FIG. 3 is a plan view showing a second embodiment of a deformation preventing construction method for a double cut-off dike according to the present invention.
【図４】本発明の二重締切堤防の変形防止工法の第２実
施例での海上施工の場合の縦断側面図である。FIG. 4 is a vertical cross-sectional side view in the case of sea construction in the second embodiment of the deformation preventing construction method for a double cut-off dike according to the present invention.
１…二重締切堤防 ２…鋼矢板 ３…中詰土 ４…原地盤 ５…改良体 ６…鋼矢板 ７…台船 ８…セメントサ
イロ ９…水タンク 10…グラウトミ
キサー 11…超高圧ポンプ 12…ＪＳＧマシ
ーン 13…サンドポンプ 14…クレーン 15…コーピング 15ａ，15ｂ…開
口1 ... Double deadline embankment 2 ... Steel sheet pile 3 ... Medium soil 4 ... Base soil 5 ... Improved body 6 ... Steel sheet pile 7 ... Barge 8 ... Cement silo 9 ... Water tank 10 ... Grout mixer 11 ... Super high pressure pump 12 ... JSG machine 13 ... Sand pump 14 ... Crane 15 ... Coping 15a, 15b ... Opening
───────────────────────────────────────────────────── フロントページの続き (72)発明者 池嵜 正勝 福岡県福岡市博多区博多駅前三丁目12番10 号 鹿島建設株式会社九州支店内 (72)発明者 三原 孝彦 東京都港区元赤坂一丁目２番７号 鹿島建 設株式会社内 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Masakatsu Ikezaki 3-12-10 Hakata Ekimae, Hakata-ku, Fukuoka City, Fukuoka Prefecture Kashima Construction Co., Ltd. Kyushu Branch (72) Inventor Takahiko Mihara 1-chome, Moto Akasaka, Minato-ku, Tokyo No. 2-7 Kashima Construction Co., Ltd.
Claims (4)
や鋼管矢板に挟まれた原地盤の部分を地盤改良すること
を特徴とした二重締切堤防の変形防止工法。1. A method for preventing deformation of a double cut-off embankment, characterized by improving the ground in a part of the soil embedded in the double cut-off embankment or the original ground sandwiched between steel sheet piles and steel pipe sheet piles.
面の原地盤の部分の必要個所を地盤改良することを特徴
とした二重締切堤防の変形防止工法。2. A method for preventing deformation of a double cut-off embankment, which further comprises improving the ground at a necessary portion of the original ground on the front surface or the back surface of the double cut-off embankment.
矢板の外側に新規の鋼矢板もしくは鋼管矢板を打設し、
既設締切鋼矢板等間あるいは既設締切鋼矢板等と新規の
鋼矢板等間もしくはその両方の原地盤の部分を地盤改良
することを特徴とした二重締切堤防の変形防止工法。3. A new steel sheet pile or a steel pipe sheet pile is placed outside the existing cut-off steel sheet pile or steel pipe sheet pile of the double cut-off levee,
A method for preventing deformation of a double cut-off dike, characterized by improving the ground between existing cut-off steel sheet piles or between existing cut-off steel sheet piles and new steel sheet piles, or both.
矢板等のそれぞれの頭部をコーピングで剛結する請求項
３記載の二重締切堤防の変形防止工法。4. The method for preventing deformation of a double cut-off levee according to claim 3, wherein the heads of the existing cut-off steel sheet pile and the new steel sheet pile are rigidly connected by copings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16058195A JP3404997B2 (en) | 1995-06-27 | 1995-06-27 | Deformation prevention method for double closing dike |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16058195A JP3404997B2 (en) | 1995-06-27 | 1995-06-27 | Deformation prevention method for double closing dike |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0913344A true JPH0913344A (en) | 1997-01-14 |
| JP3404997B2 JP3404997B2 (en) | 2003-05-12 |
Family
ID=15718064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16058195A Expired - Fee Related JP3404997B2 (en) | 1995-06-27 | 1995-06-27 | Deformation prevention method for double closing dike |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3404997B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007278042A (en) * | 2006-04-12 | 2007-10-25 | Hazama Corp | Reinforcement structure of dam body |
| JP2008180037A (en) * | 2007-01-26 | 2008-08-07 | Nippon Steel Corp | Wall body structure and its construction method |
| JP2011032690A (en) * | 2009-07-30 | 2011-02-17 | Jfe Steel Corp | Composite bank and construction method of the same |
-
1995
- 1995-06-27 JP JP16058195A patent/JP3404997B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007278042A (en) * | 2006-04-12 | 2007-10-25 | Hazama Corp | Reinforcement structure of dam body |
| JP2008180037A (en) * | 2007-01-26 | 2008-08-07 | Nippon Steel Corp | Wall body structure and its construction method |
| JP2011032690A (en) * | 2009-07-30 | 2011-02-17 | Jfe Steel Corp | Composite bank and construction method of the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3404997B2 (en) | 2003-05-12 |
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