JP4627464B2 - Inclined pile construction method - Google Patents
Inclined pile construction method Download PDFInfo
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- JP4627464B2 JP4627464B2 JP2005239074A JP2005239074A JP4627464B2 JP 4627464 B2 JP4627464 B2 JP 4627464B2 JP 2005239074 A JP2005239074 A JP 2005239074A JP 2005239074 A JP2005239074 A JP 2005239074A JP 4627464 B2 JP4627464 B2 JP 4627464B2
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- 238000010276 construction Methods 0.000 title description 7
- 230000003014 reinforcing effect Effects 0.000 claims description 18
- 230000002787 reinforcement Effects 0.000 claims description 14
- 239000002344 surface layer Substances 0.000 claims description 11
- 239000000463 material Substances 0.000 description 19
- 238000000034 method Methods 0.000 description 11
- 239000002689 soil Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000010030 laminating Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
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- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
- Revetment (AREA)
Description
本発明は、背面土圧に対する抵抗力が高く、すべりに対する安定性が高い、土嚢を用いた堤体又は盛土の補強構造に関する。 The present invention relates to a structure for reinforcing a bank body or embankment using a sandbag, which has high resistance to back-surface earth pressure and high stability against slipping.
盛土や堤体を築堤するために法面表層部に土嚢を積層し、その背面に盛土を行う工法が採用されている。土嚢は現場の馴染みもよく、安価であり、築堤には有効な材料である。このような築堤工法においては、土嚢を法尻線に沿って水平に連続的に積層して土塁を形成し、その土塁の背面に盛土することによって築堤が行われる。
しかしながら、水平に連続的に積層した土嚢は、地震時などの大きな背面土圧がかかるときにはすべりを起こし、法面が変形したり、崩れたりするおそれがあった。
In order to build embankments and embankments, a construction method is adopted in which sandbags are stacked on the slope surface layer and embankment is performed on the back. Sandbags are familiar to the site, are inexpensive, and are an effective material for embankments. In such embankment method, a sandbag is formed by laminating sandbags horizontally and continuously along the Hijiri line, and then embankment is performed by embanking the backside of the soil.
However, sandbags stacked horizontally and continuously have slipped when a large backside earth pressure is applied, such as during an earthquake, and the slope may be deformed or collapsed.
本発明らは、すべりに対する安定性が高く、特に地震時にもすべりに対する安定性が高い、土嚢を用いた盛土や堤体の築堤方法の開発を行った結果本発明に到達した。
本発明は、背面土圧に対する抵抗力が高く、すべりに対する安定性が高い、土嚢を用いた堤体又は盛土の補強構造を提供する。
The present inventors have reached the present invention as a result of the development of embankment and embankment building methods using sandbags, which have high stability against slip and in particular high stability against slip even during an earthquake.
The present invention provides a reinforcing structure for a bank body or embankment using a sandbag, which has high resistance to back-surface earth pressure and high stability against slipping.
本発明は、使用する土嚢の形状が円柱形状又は楕円柱形状であって、該土嚢の一端が法面表層部に位置し、他端が法面の内部に向かうように積層敷設され、該土嚢の積層面が該端から他端に向けて水平に対する俯角の傾斜をもって配置され、堤体及び盛土から選ばれる盛土構造物に設置されてなる盛土構造物の補強構造を提供する。 In the present invention, the sandbag to be used has a cylindrical shape or an elliptic cylinder shape, and one end of the sandbag is positioned on the slope surface layer portion, and the other end faces the inside of the slope face, and the sandbag is laminated. The laminated surface is disposed with an inclination of a depression angle with respect to the horizontal from the end to the other end, and a reinforcing structure for a banking structure is provided that is installed in a banking structure selected from a bank body and banking .
前記俯角が、５〜３５度である堤体又は盛土の補強構造は、本発明の好ましい態様である。
前記俯角の傾斜をもって配置された土嚢の法面表層部からの長さが、少なくとも５０ｃｍである堤体又は盛土の補強構造は、本発明の好ましい態様である。
The embankment or embankment reinforcing structure having a depression angle of 5 to 35 degrees is a preferred embodiment of the present invention.
A reinforcing structure of a bank body or embankment in which the length from the slope surface layer portion of the sandbag arranged with the inclination of the depression angle is at least 50 cm is a preferable aspect of the present invention.
前記土嚢の少なくとも一部が長尺土嚢である盛土構造物の補強構造は、本発明の好ましい態様である。
前記長尺土嚢が、高さ方向及び／又は幅方向に間隔を空けて配列して設置されて盛土構造物の補強構造は、本発明の好ましい態様である。
前記前記長尺土嚢が、俯角の傾斜をもって配置された部分と、それに続く水平に配置された部分とを有するものである盛土構造物の補強構造は、本発明の好ましい態様である。
A reinforcement structure of a banking structure in which at least a part of the sandbag is a long sandbag is a preferred embodiment of the present invention.
The reinforcing structure of the embankment structure in which the long sandbags are arranged and arranged at intervals in the height direction and / or the width direction is a preferable aspect of the present invention.
Wherein said elongate sandbags is a disposed with a depression angle of the inclined portion, the reinforcing structure of the embankment structure is one having a horizontally disposed portion subsequent is a preferred embodiment of the present invention.
本発明によれば、安価な材料を用いて簡単な工事により、背面土圧に対する抵抗力が高く、すべりに対する安定性が高い堤体又は盛土の補強構造が提供される。
本発明により、特に地震時においてすべりに対する安定性が高い、土嚢を用いた堤体又は盛土の補強構造が提供される。
本発明によれば、長尺土嚢を用いることによって法面の一体性が高く、また強度も大きく、法面の耐久性が優れた堤体又は盛土の補強構造が提供される。
ADVANTAGE OF THE INVENTION According to this invention, the reinforcement structure of the embankment or embankment which has high resistance with respect to a back earth pressure and high stability with respect to a slide by simple construction using an inexpensive material is provided.
According to the present invention, there is provided a reinforcing structure for a bank body or embankment using a sandbag, which has a high stability against a slip particularly during an earthquake.
ADVANTAGE OF THE INVENTION According to this invention, the integrity of a slope is high by using a long sandbag, the intensity | strength is large, and the reinforcement structure of the bank or embankment which was excellent in durability of a slope is provided.
本発明は、土嚢の一端が法面表層部に位置し、該端から他端に向けて水平に対する俯角の傾斜をもって配置され、堤体又は盛土に設置されてなる堤体又は盛土の補強構造を提供する。 The present invention provides a reinforcing structure for a levee body or embankment in which one end of a sandbag is located on a slope surface layer portion and is disposed with an inclination of a depression angle with respect to the horizontal from the end to the other end, and is installed in a levee body or embankment. provide.
従来の築堤工法は、土嚢を法尻線に沿って水平に連続的に積層して土塁を形成し、その土塁の背面に盛土することによって築堤する工法であった。図２はこのような従来の築堤工法を示している。このような従来の築堤工法では、土嚢が水平に連続的に積層されているので、地震時などの大きな背面土圧がかかるときにはすべりを起こし、法面が変形したり、崩れたりするおそれがあった。 The conventional embankment method was a method of embankment in which sandbags were continuously laminated horizontally along the hojiri line to form a soil, and then embanked on the back of the soil. FIG. 2 shows such a conventional embankment method. In such a conventional embankment method, sandbags are stacked horizontally and continuously, causing slippage when a large backside earth pressure is applied, such as during an earthquake, and the slope may be deformed or collapsed. It was.
本発明における土嚢の設置工事において、土嚢の設置方法自体は従来公知のものを採用することができる。例えば、クレーンなどの運搬装置にて運搬して設置し、続いて土嚢の転圧を行う方法を挙げることができる。設置する際に土嚢背面土を撒き出し転圧することによって、本発明の傾斜をもって配置された土嚢の設置を行うことができる。 In the sandbag installation work in the present invention, a conventionally known method can be adopted as the sandbag installation method itself. For example, a method of carrying and setting by a carrying device such as a crane and subsequently rolling the sandbag can be mentioned. The sandbag placed with an inclination according to the present invention can be installed by rolling out and rolling the sandbag backside soil during installation.
本発明の堤体又は盛土の補強構造では、土嚢が法面表層部に位置する端部から他端に向けて、水平に対する俯角の傾斜をもって配置されているので、すべりに対する安定性が高く、地震時にもすべりを起こしにくく、法面が変形したり、崩れたりするおそれが少ない堤体又は盛土の補強構造である。 In the reinforcing structure of embankment or embankment according to the present invention, the sandbag is arranged with the inclination of the depression angle with respect to the horizontal from the end portion located on the slope surface layer portion to the other end, so the stability against slip is high, and the earthquake It is a reinforcing structure for embankments or embankments that is less prone to slipping and is less prone to deformation or collapse.
本発明の土嚢が、水平に対する俯角の傾斜をもって配置されるとき、図１に示されているように積層敷設された土嚢の積層面と水平とがなす俯角は５〜３５度程度、好ましくは１５〜３０度程度であることが望ましい。
本発明で、俯角の傾斜をもって配置される土嚢の長さは、法面表層部からの長さが、少なくとも５０ｃｍであることが好ましく、５０ｃｍ〜３ｍ程度を確保することが好ましい
When the sandbag of the present invention is arranged with an inclination of a depression angle with respect to the horizontal, the depression angle formed by the horizontal surface of the laminated sandbag laminated as shown in FIG. 1 is about 5 to 35 degrees, preferably 15 It is desirable to be about ˜30 degrees.
In the present invention, the length of the sandbag arranged with the inclination of the depression angle is preferably at least 50 cm from the slope surface layer portion, and preferably about 50 cm to 3 m.
本発明で使用される土嚢は、土石材料が、柔軟性、透水性の優れた長尺の筒状袋材中に充填されたものであり、排水性能、補強効果、作業性、締め固め効果の影響範囲などを考慮すると、円柱形状又は楕円柱形状として、長さが０．５〜３．０ｍ、高さが３０〜５０ｃｍ、幅が３０〜２００ｃｍ程度のものが、また長尺土嚢の場合は、長さが１．５〜１０ｍ、好ましくは３〜１０ｍ程度が好適である。土石材料を充填した土嚢の重量としては、工事箇所に応じて定めるべきものであるが、設置工事における作業性を考慮すると、バックホウを使用する場合は２００〜６００ｋｇ、好ましくは４００〜６００ｋｇ程度、クレーンを使用する場合は３００〜３０００ｋｇ、好ましくは６００〜３０００ｋｇ程度とするのが好ましい。さらに土嚢の袋材としては、透水性を有し、耐水性、耐久性に優れた材料が好ましく、ポリエチレンやポリプロピレンなどのポリオレフィンやポリエステルの繊維やテープの織布を使用するのが好ましい。 The sandbag used in the present invention is a material in which a debris material is filled in a long cylindrical bag material excellent in flexibility and water permeability, and has drainage performance, reinforcement effect, workability, and compaction effect. In consideration of the influence range, etc., when the cylindrical shape or elliptical column shape is 0.5 to 3.0 m in length, 30 to 50 cm in height and 30 to 200 cm in width, or is a long sandbag The length is 1.5 to 10 m, preferably about 3 to 10 m. The weight of the sandbag filled with the debris material should be determined according to the construction location, but considering the workability in the installation work, when using a backhoe, 200 to 600 kg, preferably about 400 to 600 kg, crane Is preferably 300 to 3000 kg, more preferably about 600 to 3000 kg. Further, as the sandbag bag material, a material having water permeability and excellent water resistance and durability is preferable, and it is preferable to use a polyolefin or polyester fiber such as polyethylene or polypropylene, or a woven fabric of tape.
土嚢に充填される土石材料としては、特に制限はないが、排水性良好な土石材料としては、礫質材料、砕石、建設廃材などであり、排水性の低い土石材料として粘土、シルト、現場掘削土などを例示することができる。また排水性に関してこれらの中間的な土石材料として、山土、川砂、海砂などの砂質材料を挙げることができる。排水性良好な土石材料が好ましいが、排水性に関し、勾配をつけるように充填した土嚢を使用することもできる。排水性良好な土石材料を使用するときは、パイピングが発生しない透水性がある粒度分布のものである必要があるが、その一方で堤体や盛土の細流分が流出しないような粒度分布のものが望ましい。具体的には、安価で入手が容易な礫質材料、砕石、建築廃材などを挙げることができるが、入手安定性を考慮すると、礫質材料又は砕石の使用が好ましい。 There are no particular restrictions on the debris material that fills the sandbag, but debris materials with good drainage include gravel materials, crushed stones, construction waste, etc. Clay, silt, and on-site excavation as low-drainage debris materials Examples include soil. Moreover, sandy materials such as mountain soil, river sand, and sea sand can be cited as intermediate debris materials for drainage. Although a debris material with good drainage is preferable, a sandbag filled with a gradient may be used for drainage. When using a debris material with good drainage, it must have a water-permeable particle size distribution that does not cause piping, but on the other hand, it has a particle size distribution that prevents the levee and embankment trickle from flowing out. Is desirable. Specific examples include gravel materials, crushed stones, and building waste materials that are inexpensive and easily available, but considering the availability stability, the use of gravel materials or crushed stones is preferred.
土嚢の設置は、堤体を形成する過程あるいは盛土を行う過程で、土嚢の長手方向に上記した傾斜をつけて、その一端が法面表層部に位置するようにし、法面より内部方向に向かって敷設し、その上に盛土することによって行なわれる。
土嚢の設置する際に、土嚢の一部を長尺土嚢とし、規則性をもって高さ方向及び幅方向に間隔を置いて設置すると、堤体あるいは盛土の強度を増すので補強の効果がある。
The sandbag is installed in the process of forming a levee body or embankment, with the above-mentioned inclination in the longitudinal direction of the sandbag so that one end of the sandbag is located on the surface of the slope and facing inward from the slope. It is done by laying and embedding on it.
When the sandbag is installed, if a part of the sandbag is made into a long sandbag and is installed at regular intervals at intervals in the height direction and the width direction, the strength of the levee body or embankment is increased, which has a reinforcing effect.
長尺土嚢を使用するとき、法面表層部から５０ｃｍ〜３ｍ程度を、俯角の傾斜をもって配置し、残余の部分を水平に配置してもよい。 When using a long sandbag, about 50 cm to 3 m from the slope surface layer portion may be arranged with a depression angle, and the remaining portion may be arranged horizontally.
本発明の堤体又は盛土の補強構造においては、補強効果を高めるために、ジオグリッドを上下の土嚢間の任意箇所に敷設することもできる。また土嚢を並列的に及び／又は積み重ねて配列する場合においては、ジオグリッドを、複数の土嚢を包み込むように敷設することもできる。 In the reinforcing structure for embankments or embankments of the present invention, a geogrid can be laid at an arbitrary location between upper and lower sandbags in order to enhance the reinforcing effect. In the case where the sandbags are arranged in parallel and / or stacked, the geogrid can be laid so as to wrap around the plurality of sandbags.
図１は、土嚢２が堤体１の法面を形成するように、土嚢の一端が法面表層部に位置し、該端から他端に向けて水平に対する俯角の傾斜をもって配置され、積み上げられた状態を示す模式図である。土嚢２は、緩勾配法面あるいは急勾配法面となるように積み上げてもよく、また垂直法面を形成するように積み上げてもよい。図１においては、長尺土嚢３が間隔を空けて配列して設置されている。長尺土嚢３の俯角の傾斜をもって配置された部分に続く部分４は、水平に配置されている。
In FIG. 1, one end of the sandbag is positioned on the slope surface layer portion so that the
図１の土嚢２の法面表層部からの長さｂが、少なくとも５０ｃｍ以上、好ましくは５０ｃｍ〜３ｍ程度であることが好ましく、また傾斜する土嚢の俯角ａが、５〜３５度程度、好ましくは１５〜３０度程度であることが好ましい。
The length b of the
図２は従来の土嚢を水平に積層する築堤工法一例を示す模式図である。堤体１の法面に土嚢２が水平方向に積層されている様子示している。
FIG. 2 is a schematic diagram showing an example of a conventional embankment method for horizontally laminating sandbags. The state where the
本発明の堤体又は盛土の補強構造では、土嚢による拘束によって、土嚢の滑りに対して補強効果を発揮するので、堤体全体の安全性が高められる。
本発明により、背面土圧に対する抵抗力が高く、すべりに対する安定性が高い堤体又は盛土の補強構造が提供される。
本発明によれば、安価な材料を用いて簡単な工事により、背面土圧に対する抵抗力が高く、すべりに対する安定性が高い堤体又は盛土の補強構造の構築を可能となる。
本発明により提供される土嚢を用いた堤体又は盛土の補強構造は、すべりに対する安定性が高いので、地震時などでも法面が変形したり、崩れたりし難い堤体又は盛土の補強構造が提供される。
本発明によれば、長尺土嚢を用いることによって法面の一体性が高く、また強度も大きく、法面の耐久性が優れた堤体又は盛土の補強構造が提供される。
In the dam body or embankment reinforcement structure of the present invention, the reinforcement effect against the slip of the sandbag is exhibited by the restraint by the sandbag, so that the safety of the entire dam body is enhanced.
ADVANTAGE OF THE INVENTION By this invention, the reinforcement structure of a bank body or embankment with high resistance with respect to a back surface earth pressure and high stability with respect to a slide is provided.
According to the present invention, it is possible to construct a dam body or embankment reinforcement structure that has high resistance to back-surface pressure and high stability against slip by simple construction using an inexpensive material.
The dam body or embankment reinforcement structure using sandbags provided by the present invention has high stability against slipping, so that the dam body or embankment reinforcement structure is less likely to deform or collapse even during an earthquake. Provided.
ADVANTAGE OF THE INVENTION According to this invention, the integrity of a slope is high by using a long sandbag, the intensity | strength is large, and the reinforcement structure of the bank or embankment which was excellent in durability of a slope is provided.
１ 堤体
２ 土嚢
３ 長尺土嚢
ａ 俯角
ｂ 土嚢部分の長さ
1
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| JP5980579B2 (en) * | 2012-06-05 | 2016-08-31 | 国立研究開発法人農業・食品産業技術総合研究機構 | Construction method of embankment structure |
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