JPH0357245B2 - - Google Patents
Info
- Publication number
- JPH0357245B2 JPH0357245B2 JP58070099A JP7009983A JPH0357245B2 JP H0357245 B2 JPH0357245 B2 JP H0357245B2 JP 58070099 A JP58070099 A JP 58070099A JP 7009983 A JP7009983 A JP 7009983A JP H0357245 B2 JPH0357245 B2 JP H0357245B2
- Authority
- JP
- Japan
- Prior art keywords
- woven fabric
- groove material
- nonwoven fabric
- drain
- pieces
- 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
Links
- 239000004745 nonwoven fabric Substances 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 13
- 238000005452 bending Methods 0.000 claims description 3
- 238000007596 consolidation process Methods 0.000 description 4
- 230000035699 permeability Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000004927 clay Substances 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/10—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Agronomy & Crop Science (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Description
【発明の詳細な説明】
本発明は地盤改良用ボードドレーンに関するも
のである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a board drain for soil improvement.
現在、高含水比の軟弱粘土質地盤を圧密脱水す
るために地盤中に打込まれる地盤改良用ボードド
レーンとしては紙質からなるペーパードレーン、
合成樹脂と化学繊維不織布からなるケミカルドレ
ーン等各種のものがあり、例えばペーパードレー
ンを用いたペーパードレーン工法は、陸上での地
盤改良工事において、経済的な圧密促進工法とし
て広く行われている。ペーパードレーンの鉛直方
向透水係数は粘土に比べて非常に大きく、その透
水性が改良効果に悪影響を及ぼすことは無いと考
えられていたが、最近ではドレーンの透水係数が
粘土のそれに比べて単純に無視できないことが指
摘されるようになり、特に改良深度が15ｍ以上と
大きくなると、深い所では圧密に時間的な遅れが
生じることが判明してきた。そしてこの圧密の遅
れは、実工事においてはあたかもペーパードレー
ン打設の効果が無いかのごとく受けとめられがち
である。又、現在使用されているドレーンには前
記したように各種のものがあるが、その断面寸法
は何れも厚さ0.3cm、幅10cm（断面積３cm2）程度
であり、この断面に関して次のような欠点があ
る。 Currently, paper drains made of paper are used as ground improvement board drains that are driven into the ground to consolidate and dewater soft clayey soils with high water content.
There are various types such as chemical drains made of synthetic resin and chemical fiber non-woven fabric. For example, the paper drain method using paper drains is widely used as an economical method for promoting consolidation in ground improvement work on land. The vertical permeability coefficient of paper drains is much higher than that of clay, and it was thought that its permeability would not have a negative effect on the improvement effect, but recently it has become clear that the permeability coefficient of paper drains is simply lower than that of clay. It has been pointed out that this cannot be ignored, and it has become clear that there is a time delay in consolidation, especially when the improvement depth becomes greater than 15 m. In actual construction, this delay in consolidation tends to be perceived as if the installation of paper drains has no effect. In addition, as mentioned above, there are various types of drains currently in use, but their cross-sectional dimensions are approximately 0.3 cm thick and 10 cm wide (cross-sectional area 3 cm 2 ). There are some drawbacks.
(1) 断面積が小さいため、通水量に自と限界があ
る。(1) Due to the small cross-sectional area, there is a limit to the amount of water that can pass through.
(2) 改良深度が深い時は、ドレーン内の通水距離
が長くなり抵抗が増す。(2) When the improvement depth is deep, the water flow distance inside the drain becomes longer and resistance increases.
(3) (1)、(2)の相乗的な現象として、ドレーンの鉛
直方向の透水係数が見掛け上低下し、深い所の
圧密が遅れ易い。(3) As a synergistic phenomenon of (1) and (2), the permeability coefficient in the vertical direction of the drain apparently decreases, which tends to delay consolidation in deep areas.
このような欠点は互いに離間して対向する長尺
の２枚の不織布と、この２枚の不織布間に介挿し
た溝材とより成るボードドレーンを用いれば解決
できるが、このようなボードドレーンは長手方向
に対する曲げ剛性が増加するため地中での変形に
追従できず、又ロール状に梱包して取り扱いを容
易ならしめる等のことができない欠点があつた。 These drawbacks can be solved by using a board drain consisting of two long pieces of non-woven fabric facing each other at a distance from each other and a groove material inserted between these two pieces of non-woven fabric. Since the bending rigidity in the longitudinal direction increases, it cannot follow deformation underground, and it also cannot be packed in a roll to make it easier to handle.
本発明の地盤改良用ボードドレーンは上記のよ
うな欠点を除去するため互いに離間して対向する
長尺の２枚の不織布と、この２枚の不織布間に介
挿した波形に折り曲げて形成した溝材とより成
り、この溝材は長さ方向に互いに離間した位置で
前記一方の不織布と接する辺から両側面を構成す
る板材に他方の不織布に向かつて切り込みを有す
ることを特徴とする。 In order to eliminate the above-mentioned drawbacks, the board drain for ground improvement of the present invention consists of two long pieces of non-woven fabric facing each other at a distance from each other, and a groove formed by bending into a corrugated shape inserted between the two pieces of non-woven fabric. The groove material is characterized in that the plate material constituting both side surfaces has incisions extending from the side in contact with the one nonwoven fabric toward the other nonwoven fabric at positions spaced apart from each other in the length direction.
以下図面によつて本発明の実施例を説明する。 Embodiments of the present invention will be described below with reference to the drawings.
本発明においては第１図〜第３図に示すように
幅約100mmの長尺な２枚の化学繊維不織布１，１
を約６mm〜12mm離間して互いに対向配置し、この
間に波形に折り曲げた塩化ビニールの溝材２を介
挿してボードドレーンを形成せしめると共に、こ
の溝材２の長さ方向に離間した位置で前記一方の
不織布１に接する辺から両側面を構成する板材に
他方の不織布に向かつて複数の切り込み３，３を
形成する。 In the present invention, as shown in FIGS. 1 to 3, two long chemical fiber nonwoven fabrics 1, 1 with a width of about 100 mm are
are arranged facing each other at a distance of about 6 mm to 12 mm, and a corrugated vinyl chloride groove material 2 is inserted between them to form a board drain, and at positions spaced apart in the length direction of this groove material 2, A plurality of cuts 3, 3 are formed in the plate material constituting both side surfaces from the side in contact with one nonwoven fabric 1 toward the other nonwoven fabric.
尚、本発明における溝材２としては第２図に示
す形状のもののほか弧状に折り曲げたものや多数
の短冊状の板を離間して配置しその中央部を連結
杆によつて結合した形のもの等、従来既知の種々
のものを用いることができる。 In addition to the shape shown in FIG. 2, the groove material 2 of the present invention may be one bent into an arc shape or one in which a number of strip-shaped plates are spaced apart and their central parts are connected by a connecting rod. Various conventionally known materials can be used.
本発明ボードドレーンは上記のような構成であ
るから地中での変形に追従し易く、又溝材に設け
た切り込みによつて剛性を調整できるので容易に
ロール状に梱包でき取り扱い易くすることができ
る利点がある。 Since the board drain of the present invention has the above-mentioned structure, it can easily follow deformation underground, and the rigidity can be adjusted by the cuts made in the groove material, so it can be easily packed in a roll shape and made easy to handle. There are advantages that can be achieved.
第１図は本発明ボードドレーンの正面図、第２
図は第１図の２−２線断面図、第３図は第１図の
３−３線断面図である。
１……不織布、２……溝材、３……切り込み。
Figure 1 is a front view of the board drain of the present invention, Figure 2 is a front view of the board drain of the present invention;
The figure is a sectional view taken along line 2-2 in FIG. 1, and FIG. 3 is a sectional view taken along line 3-3 in FIG. 1... Non-woven fabric, 2... Groove material, 3... Notch.
Claims (1)
と、この２枚の不織布間に介挿した波形に折り曲
げて形成した溝材とより成り、この溝材は長さ方
向に互いに離間した位置で前記一方の不織布と接
する辺から両側面を構成する板材に他方の不織布
に向かつて切り込みを有することを特徴とする地
盤改良用ボードドレーン。1 Consists of two long pieces of non-woven fabric facing each other at a distance from each other, and a groove material formed by bending into a corrugated shape inserted between these two pieces of non-woven fabric, and this groove material is formed at positions spaced apart from each other in the length direction. A board drain for ground improvement, characterized in that the plate material constituting both side surfaces has a notch extending from the side in contact with the one nonwoven fabric to the other nonwoven fabric.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7009983A JPS59195916A (en) | 1983-04-22 | 1983-04-22 | Board drain for improving ground |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7009983A JPS59195916A (en) | 1983-04-22 | 1983-04-22 | Board drain for improving ground |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59195916A JPS59195916A (en) | 1984-11-07 |
| JPH0357245B2 true JPH0357245B2 (en) | 1991-08-30 |
Family
ID=13421741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7009983A Granted JPS59195916A (en) | 1983-04-22 | 1983-04-22 | Board drain for improving ground |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59195916A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2517018Y2 (en) * | 1990-05-14 | 1996-11-13 | 株式会社大林組 | Drain material |
| KR100728104B1 (en) | 2006-11-28 | 2007-06-13 | (주) 경화엔지니어링 | Plastic board drain |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5534205B2 (en) * | 1973-03-02 | 1980-09-05 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5555321Y2 (en) * | 1973-01-27 | 1980-12-22 | ||
| JPS592553Y2 (en) * | 1978-08-25 | 1984-01-24 | リズム時計工業株式会社 | Second hand stop mechanism |
-
1983
- 1983-04-22 JP JP7009983A patent/JPS59195916A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5534205B2 (en) * | 1973-03-02 | 1980-09-05 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59195916A (en) | 1984-11-07 |
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