JPH0430488B2 - - Google Patents
Info
- Publication number
- JPH0430488B2 JPH0430488B2 JP28437185A JP28437185A JPH0430488B2 JP H0430488 B2 JPH0430488 B2 JP H0430488B2 JP 28437185 A JP28437185 A JP 28437185A JP 28437185 A JP28437185 A JP 28437185A JP H0430488 B2 JPH0430488 B2 JP H0430488B2
- Authority
- JP
- Japan
- Prior art keywords
- ground
- liquefaction
- sheet pile
- vertical pipe
- pipe
- 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
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 238000010276 construction Methods 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 230000006378 damage Effects 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000035699 permeability Effects 0.000 description 5
- 239000002245 particle Substances 0.000 description 4
- 239000002689 soil Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 239000003673 groundwater Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
Landscapes
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は鉄道、高速道路、干拓堤防、河川堤防
等の線状盛土構造物、その他港湾施設等における
構築地盤の液状化対策工法に係るものである。[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a construction method for preventing liquefaction of construction ground for railways, expressways, linear embankment structures such as reclamation embankments, river embankments, and other port facilities. It is.
（従来の技術）
地下水を有する砂質地盤は大地震時に土粒子の
組合せが密になるので地下水の存在する空間が小
さくなり、間〓水圧が上昇し、同間〓水圧と上載
荷重による圧力とが等しくなつたとき完全な液状
化を生じる。(Conventional technology) In sandy ground that has groundwater, the combination of soil particles becomes dense during a large earthquake, so the space where groundwater exists becomes smaller, and the water pressure increases, and the pressure due to the water pressure and overburden load increases. Complete liquefaction occurs when the
地盤が液状化すると地盤上の構造物は沈下や破
壊を生起し、地盤中の構造物はその見掛けの密度
が液状化地盤の密度より小さい場合には浮上す
る。 When the ground liquefies, structures on the ground sink or break, and structures in the ground float up if their apparent density is lower than the density of the liquefied ground.
鉄道や高速道路のような線状の構造物は路線延
長が長いため、液状化の可能性のある地盤上に構
築される場合もあり、液状化対策が必要となる。 Because linear structures such as railways and expressways have long routes, they are sometimes built on ground that may liquefy, so liquefaction countermeasures are required.
液状化の可能性のある地盤上に盛土を構築した
鉄道や高速道路では、その液状化対策工法とし
て、盛土の法尻に２列のシートパイルを貫入し、
同シートパイルの地表部分の頭部をタイロツド、
またはタイブルで連結し、シートパイル内の地盤
に液状化が生じた場合、液状化した地盤がシート
パイルの外に流出するるのを抑止することによつ
て、盛土の沈下、破壊を軽減する方法を採用して
いる。 For railways and expressways where embankments are constructed on ground that may liquefy, two rows of sheet piles are inserted into the bottom of the embankment as a liquefaction countermeasure construction method.
Tie rod the head of the surface part of the same sheet pile,
Or, a method to reduce embankment subsidence and destruction by connecting the piles with tiles and preventing the liquefied ground from flowing out of the sheet piles when liquefaction occurs in the ground inside the sheet piles. is adopted.
（発明が解決しようとする問題点）
前記従来の工法は、地盤の液状化が発生した段
階で液状化した地盤の流出を阻止しようとするも
のであつて、積極的に地盤の液状化を防止しよう
とするものではなく、地盤の液状化対策工法とし
ては抜本的な工法とはいい難い。(Problems to be Solved by the Invention) The above-mentioned conventional construction method attempts to prevent the flow of liquefied ground at the stage where liquefaction of the ground occurs. However, it cannot be said that it is a drastic construction method to prevent ground liquefaction.
（問題点を解決するための手段）
本発明はこのような問題点を解決するために提
案されたものであつて、所要位置毎に鉛直管が添
接されたシートパイルを地盤内に貫入し、前記鉛
直管を介して液状化地盤から排水することを特徴
とする地盤の液状化対策工法に係るものである。(Means for Solving the Problems) The present invention was proposed to solve these problems, and involves penetrating sheet piles into the ground to which vertical pipes are attached at each required position. , relates to a ground liquefaction countermeasure construction method characterized by draining water from the liquefied ground through the vertical pipe.
（作用）
本発明においては前記したように、所定位置毎
に鉛直管が添接されたシートパイルを地盤内に貫
入することによつて、地震時に間〓水圧が上昇し
た地盤から、前記鉛直管の中空部を通して排水さ
れ、積極的に地盤の液状化が防止される。(Function) As described above, in the present invention, by penetrating into the ground a sheet pile to which vertical pipes are attached at predetermined positions, the vertical pipes can be removed from the ground where water pressure has increased during an earthquake. Water is drained through the hollow part of the tank, actively preventing liquefaction of the ground.
また仮令、地盤に液状化が発生しても、シート
パイルによつて土粒子の同シートパイル外への流
出が防止され、地盤上の構造物の破壊の度合が軽
減される。 Furthermore, even if liquefaction occurs in the ground, the sheet pile prevents soil particles from flowing out of the sheet pile, reducing the degree of destruction of structures on the ground.
（発明の効果）
本発明の方法によれば、シートパイルに添接さ
れた鉛直管による道盤の液状化発生の防止と、シ
ートパイルの締切り効果による地盤の液状化発生
時における土粒子の外部への流出の抑止との２段
構えの対策によつて、地盤上構造物の破壊の度合
を軽減しうるものである。(Effects of the Invention) According to the method of the present invention, the vertical pipes attached to the sheet piles prevent liquefaction of the roadbed, and the closing effect of the sheet piles prevents soil particles from leaving the ground when liquefaction occurs. The degree of destruction of structures on the ground can be reduced by taking two steps: preventing the outflow.
また本発明によれば、前記鉛直管の口径、長
さ、設置ピツチを調整し、また鉛直管内に透水係
数の異なる土砂を充填することによつて、地盤の
液状化の度合を制御することができる。 Further, according to the present invention, the degree of liquefaction of the ground can be controlled by adjusting the diameter, length, and installation pitch of the vertical pipe, and by filling the vertical pipe with earth and sand having different permeability coefficients. can.
（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.
１はシートパイルで、その所要位置毎に透水性
能を有するアングル状鉄板２を溶着して、同鉄板
２とシートパイル１本体との間に鉛直の管部ａを
形成するか、同本体に透水性能を有する鉛直の管
３を溶着する。 1 is a sheet pile, and angle-shaped iron plates 2 having water permeability are welded at each required position to form a vertical pipe section a between the iron plates 2 and the main body of the sheet pile 1, or water permeable to the main body is formed. Weld a vertical pipe 3 with performance.
而してシートパイル１の貫入に先行して前記鉄
板２とシートパイル１本体との間に形成された透
水性能を有する管部ａ、または同シートパイル１
本体に溶着された透水性能を有する管３は、夫々
第２図及び第３図に示す如き先端閉合の沓部２
ａ，３ａを有する構造となつている。 The pipe portion a having water permeability formed between the iron plate 2 and the main body of the sheet pile 1 prior to the penetration of the sheet pile 1 or the sheet pile 1
The pipe 3 having water permeability welded to the main body has a shoe part 2 with a closed end as shown in FIGS. 2 and 3, respectively.
It has a structure having a and 3a.
なお前記鉛直の管部ａ、または鉛直の管３の長
さは液状化発生の可能性のある地盤に到達する長
さとする。 The length of the vertical pipe portion a or the vertical pipe 3 is set to reach the ground where liquefaction may occur.
図示の実施例は前記したように構成されている
ので、地震時に間〓水圧が上昇した地盤から、前
記管部ａ、または管３の中空部を通して排水さ
れ、地盤の液状化が防止される。 Since the illustrated embodiment is configured as described above, water is drained from the ground where the water pressure has increased during an earthquake through the hollow part of the pipe section a or the pipe 3, and liquefaction of the ground is prevented.
また地盤の液状化が発生した場合でも、シート
パイル１によつて土粒子の同シートパイル１外へ
の流出が阻止され、地盤上の構造物の破壊の度合
が軽減される。 Further, even if liquefaction of the ground occurs, the sheet pile 1 prevents soil particles from flowing out of the sheet pile 1, reducing the degree of destruction of structures on the ground.
なお前記鉄板２や鉛直の管３に用いる材質や添
付・加工方法を変えることによつて、その透水性
能を変えたり前記シートパイル１に形成される鉛
直の管部ａ、鉛直の管３の口径、長さ、設置ピツ
チを調整したり、或いは前記管部ａまたは鉛直の
管３内に透水係数の異なる土砂を充填することに
よつて地盤の液状化の度合を制御することができ
る。従つて地震時に被害を生じてはならない個所
の液状化対策工法として適用できるとともに、重
要度の低い個所に被害を集中させ、速やかに復旧
する方法も措られる。 By changing the materials used for the iron plate 2 and the vertical pipe 3, and the attachment and processing methods, their water permeability can be changed, and the diameter of the vertical pipe part a formed on the sheet pile 1 and the vertical pipe 3 can be changed. The degree of liquefaction of the ground can be controlled by adjusting the length and installation pitch, or by filling the pipe portion a or the vertical pipe 3 with earth and sand having different hydraulic conductivity. Therefore, it can be applied as a method to prevent liquefaction in areas where damage should not occur in the event of an earthquake, and it can also be used as a method for concentrating damage on less important areas and quickly restoring them.
以上本発明を実施例について説明したが、本発
明は勿論このような実施例にだけ局限されるもの
ではなく、本発明の精神を逸脱しない範囲内で種
種の設計の改変を施しうるものである。 Although the present invention has been described above with reference to embodiments, the present invention is, of course, not limited to such embodiments, and can be modified in various designs without departing from the spirit of the present invention. .
第１図は本発明の方法に使用されるシートパイ
ルの部分斜面図、第２図及び第３図は夫々シート
パイルに設けた鉛直管部の先端部分を示す斜面図
である。
１……シートパイル、２……鉄板、３……管、
ａ……管部。
FIG. 1 is a partial perspective view of a sheet pile used in the method of the present invention, and FIGS. 2 and 3 are perspective views showing the tip portions of vertical pipes provided in the sheet pile, respectively. 1...Sheet pile, 2...Iron plate, 3...Pipe,
a...Pipe section.
Claims (1)
ルを地盤内に貫入し、前記鉛直管を介して液状化
地盤から排水することを特徴とする地盤の液状化
対策工法。1. A ground liquefaction countermeasure construction method characterized by penetrating sheet piles with vertical pipes attached at required positions into the ground and draining water from the liquefied ground through the vertical pipes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28437185A JPS62146315A (en) | 1985-12-19 | 1985-12-19 | Ground liquefaction countermeasure construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28437185A JPS62146315A (en) | 1985-12-19 | 1985-12-19 | Ground liquefaction countermeasure construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62146315A JPS62146315A (en) | 1987-06-30 |
| JPH0430488B2 true JPH0430488B2 (en) | 1992-05-21 |
Family
ID=17677711
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28437185A Granted JPS62146315A (en) | 1985-12-19 | 1985-12-19 | Ground liquefaction countermeasure construction method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62146315A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0691606B2 (en) * | 1987-06-11 | 1994-11-14 | キヤノン株式会社 | Image processing method |
| KR101158882B1 (en) * | 2010-05-26 | 2012-06-25 | (주)대우건설 | Steel sheet pile for measuring ground-water level and injecting grout material |
-
1985
- 1985-12-19 JP JP28437185A patent/JPS62146315A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62146315A (en) | 1987-06-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| EXPY | Cancellation because of completion of term |