JP5313192B2 - Slope stabilization method with drainage using injected material - Google Patents
Slope stabilization method with drainage using injected material Download PDFInfo
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- JP5313192B2 JP5313192B2 JP2010046338A JP2010046338A JP5313192B2 JP 5313192 B2 JP5313192 B2 JP 5313192B2 JP 2010046338 A JP2010046338 A JP 2010046338A JP 2010046338 A JP2010046338 A JP 2010046338A JP 5313192 B2 JP5313192 B2 JP 5313192B2
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Description
本発明は、注入材を用いた排水体による斜面安定化工法に関するものである。 The present invention relates to a slope stabilization method using a drainage body using an injection material.
図４は従来の地下水を低下させつつ斜面を力学的に補強する斜面安定化工法の模式図、図５は図４における中空管体とそれに形成された集水孔を示す斜視図である（下記特許文献１参照）。
この図に示すように、まず、中空管体１０３を削孔１０６内に設置し、グラウト材１０５を注入して、中空管体１０３の先端側を地山１０１中に定着させる。次に、中空管体１０３の頭部に定着プレート１０７を装着して、中空管体１０３に定着ナット１０８を螺着することで、斜面１０２の表面に固定する。地山１０１中に打設された中空管体１０３は、先端側が頭部側よりも上方になるように傾斜状態で設置されるとともに、外周に設置された透水性の排水材１０４と集水孔１０３Ａとを有している。そのため、地山１０１中の地下水は、排水材１０４と集水孔１０３Ａとを介して、中空管体１０３内に取り込まれ、その後、取り込まれた地下水は、中空管体１０３内を流下して外部に排出される。つまり、アンカー１０９が、地山１０２の抑止補強工と地下水排水工とを兼ね合わせた機能を備えている。
FIG. 4 is a schematic diagram of a slope stabilization method for dynamically reinforcing a slope while lowering groundwater, and FIG. 5 is a perspective view showing a hollow tube body and a water collecting hole formed therein in FIG. See Patent Document 1 below).
As shown in this figure, first, the hollow tube 103 is installed in the hole 106 and the grout material 105 is injected to fix the distal end side of the hollow tube 103 in the ground 101. Next, the fixing plate 107 is attached to the head of the hollow tube 103, and the fixing nut 108 is screwed onto the hollow tube 103, thereby fixing the surface of the inclined surface 102. The hollow tube body 103 placed in the natural ground 101 is installed in an inclined state so that the tip side is higher than the head side, and the water-permeable drainage material 104 and water collection installed on the outer periphery. And a hole 103A. Therefore, the groundwater in the natural ground 101 is taken into the hollow tube 103 through the drainage material 104 and the water collection hole 103 </ b> A, and then the taken-in groundwater flows down in the hollow tube 103. Discharged outside. In other words, the anchor 109 has a function of combining a deterrent reinforcement work for the natural ground 102 and a groundwater drainage work.
また、建築物または構造物等に用いられる透水性を備えた多孔質構造体として、工場生産はもとより現場施工においても品質管理が容易で、しかも必要な強度を良好に得ることができる、多孔質構造体およびその施工方法が提案されている（下記特許文献２参照）。
さらに、シールドトンネル内で、裏込基材に膨潤された空隙形成材を混入した透水性裏込材を設けるようにしたものが提案されている（下記特許文献３参照）。
In addition, as a porous structure with water permeability used in buildings or structures, quality control is easy not only in factory production but also in on-site construction, and the necessary strength can be obtained well. A structure and its construction method have been proposed (see Patent Document 2 below).
Furthermore, what has provided the water-permeable backing material which mixed the swelling space | gap formation material in the backing base material in a shield tunnel is proposed (refer the following patent document 3).
しかしながら、上記した斜面安定化工法は、多くの資材を要することになり、その施工が複雑になるといった問題があった。特に、中空管体１０３には集水孔１０３Ａを形成し、透水性の排水材１０４からの通水を集水孔１０３Ａから中空管体１０３に導入して、その導入された通水を斜面１０２から排出する必要があった。
また、地盤内の地下水位低下を目的として従来用いられてきた排水パイプを用いた地下水位低下工法では、工場等で必要長さに予め切断・加工されたパイプが打設されてきた。ここで、パイプの必要長さは、施工対象地盤の数カ所で実施した調査結果から想定した地下水位分布等の地盤性状の三次元的な広がりを基にして決定されている。このような調査結果が実地盤の状態を完全に捉えることは不可能であることから、実際の施工時には排水パイプを長めに打設する必要があった。
However, the slope stabilization method described above requires a lot of materials and has a problem that its construction becomes complicated. In particular, the hollow tube 103 is formed with a water collection hole 103A, and water from the water-permeable drainage material 104 is introduced into the hollow tube 103 through the water collection hole 103A. It was necessary to discharge from the slope 102.
In the groundwater level lowering method using drainage pipes that has been conventionally used for the purpose of lowering the groundwater level in the ground, pipes that have been cut and processed in advance to the required length have been placed in factories and the like. Here, the required length of the pipe is determined on the basis of the three-dimensional extent of the ground properties such as the groundwater level distribution assumed from the survey results carried out at several locations on the construction target ground. Since such survey results cannot completely capture the actual ground condition, it was necessary to install a long drain pipe during actual construction.
さらに、のり尻付近の排水を容易にする方法として、のり尻に排水ブランケットを設ける方法やふとんかごを設置する方法があるが、既設の斜面に設置する場合には斜面を一時撤去の上敷設する必要があり、費用がかかる上、施工に際し、のり尻を緩めることから、斜面安定上の問題があった。
本発明は、上記状況に鑑みて、少ない資材でもって容易に施工することができるとともに、溶解性繊維を混入した注入材の固化によって得られる排水体により、地山の斜面からの排水を容易に行うことができる注入材を用いた排水体による斜面安定化工法を提供することを目的とする。
In addition, there are two methods for facilitating drainage near the glue buttocks: a drainage blanket at the glue buttocks and a funnel can be installed. There is a problem in slope stability because it is necessary and expensive, and the butt is loosened during construction.
In view of the above situation, the present invention can be easily constructed with a small amount of material, and drainage from a slope of a natural mountain can be easily performed by a drainage body obtained by solidifying an injection material mixed with a soluble fiber. It aims at providing the slope stabilization construction method by the drainage body using the injection material which can be performed.
本発明は、上記目的を達成するために、
〔１〕地山の斜面にボーリングマシンで削孔を形成し、この削孔内に注入管を設置し、この注入管を介して前記削孔内に溶解性繊維を混入した注入材を充填し、前記溶解性繊維を混入した注入材による排水体を用いて前記地山からの排水を円滑に行うようにした斜面安定化工法であって、前記溶解性繊維を混入した注入材は、固化材、安定材及び助材からなる裏込めＡ液と、水ガラス系の急硬材Ｂ液とを配合調整し粘性を持たせたものに、５℃以下の冷却水により膨潤状態にした、確実なアルカリ分解性及び熱溶解性を有する溶解性繊維を均等に混入したものである。
In order to achieve the above object, the present invention provides
[1] locations to form a slope on the drilling boring machine mountains, established the injection pipe into the drilling, Hama the injection tube implanted material mixed with soluble fiber in said drilling through charge And a slope stabilization method for smoothly draining water from the ground using a drainage body made of an injection material mixed with the soluble fiber, wherein the injection material mixed with the soluble fiber is solidified. A mixture of a backfill A solution consisting of a material, a stabilizer and an auxiliary material, and a water glass-based quick hard material B solution, which has been adjusted and given viscosity, is swelled with cooling water at 5 ° C. or lower. It is obtained by uniformly mixing soluble fibers having high alkali decomposability and heat solubility.
本発明によれば、ボーリングマシン等により地盤に削孔を形成し、その後、この削孔内に溶解性繊維を混入した注入材を充填し、地盤内に棒状の排水体を形成する。したがって、実際に必要な排水体の長さおよび直径を施工時に確認することでき、これに応じて削孔長及び削孔径を調整し、最適な長さの排水体を地盤内に形成することができる。これにより、排水体の過不足を低減し、効果的な地下水位低下が可能となる。 According to the present invention, soil in forming a drilling by like boring machine, then, filled with injected material mixed with soluble fiber in the drilling, to form a drainage body of the rod-like in the ground. Therefore, it is possible to confirm the length and diameter of the drainage body actually required at the time of construction, and adjust the drilling length and drilling diameter accordingly to form the drainage body with the optimum length in the ground. it can. Thereby, excess and deficiency of a drainage body is reduced, and an effective groundwater level fall is attained.
また、のり尻付近に連続的に設置することで斜面を緩めることなく、排水ブランケット等と同様の効果を付加することが期待でき、斜面内部の水位を低下させることが可能となる。
また、溶解性繊維を混入した注入材の固化によって得られる排水体により地山の斜面からの排水を容易に行うことができる。
Moreover, it can be expected that the same effect as a drainage blanket or the like can be added without loosening the slope by continuously installing it near the bottom of the glue, and the water level inside the slope can be lowered.
Moreover, drainage from the slope of the natural ground can be easily performed by the drainage body obtained by solidifying the injection material mixed with the soluble fiber.
さらに、排水体の直径を任意に変えることが可能であり、地山の斜面の滑動力に応じた周面摩擦力を得ることが可能である。 Furthermore, it is possible to arbitrarily change the diameter of the drainage body, and it is possible to obtain a peripheral friction force according to the sliding force of the slope of the natural ground.
本発明の注入材を用いた排水体による斜面安定化工法は、地山の斜面にボーリングマシンで削孔を形成し、この削孔内に注入管を設置し、この注入管を介して前記削孔内に溶解性繊維を混入した注入材を充填し、前記溶解性繊維を混入した注入材による排水体を用いて前記地山からの排水を円滑に行うようにした斜面安定化工法であって、前記溶解性繊維を混入した注入材は、固化材、安定材及び助材からなる裏込めＡ液と、水ガラス系の急硬材Ｂ液とを配合調整し粘性を持たせたものに、５℃以下の冷却水により膨潤状態にした、確実なアルカリ分解性及び熱溶解性を有する溶解性繊維を均等に混入したものである。 In the slope stabilization method using the drainage body using the injection material of the present invention, a drilling hole is formed on a slope of a natural ground by a boring machine, an injection pipe is installed in the drilling hole, and the above-mentioned cutting through the injection pipe. it injected material mixed with soluble fiber in the holes Filling, there slopes stabilizing construction method as smoothly draining from the ground mountain with a drainage body by injecting material mixed with the soluble fiber The injection material mixed with the soluble fiber is a mixture of a backfill A liquid composed of a solidifying material, a stabilizing material, and an auxiliary material, and a water glass-based rapid hardening material B liquid, which is adjusted to have a viscosity. A soluble fiber having a certain alkali decomposability and heat solubility, which has been swollen with cooling water of 5 ° C. or lower, is evenly mixed.
以下、本発明の実施の形態について詳細に説明する。
図１は本発明の実施例を示す注入材の固化による排水体を用いた斜面安定化工法を示す模式図、図２はその排水体を用いた斜面安定化工法により構築された斜面安定化構造を示す図である。
まず、図１（ａ）に示すように、地山１の斜面２からボーリングマシン（図示なし）で削孔３を形成する（ステップＳ１）。
Hereinafter, embodiments of the present invention will be described in detail.
FIG. 1 is a schematic diagram showing a slope stabilization method using a drainage body by solidifying an injection material according to an embodiment of the present invention, and FIG. 2 is a slope stabilization structure constructed by a slope stabilization method using the drainage body. FIG.
First, as shown in FIG. 1A, a drilling hole 3 is formed from a slope 2 of a natural ground 1 with a boring machine (not shown) (step S1).
次に、図１（ｂ）に示すように、形成された削孔３内に注入管４を挿入し、口元５を閉じる（ステップＳ２）。
次に、図１（ｃ）に示すように、溶解性繊維を混入した注入材６を注入管４を介して削孔３内に充填機７で注入し、充填する（ステップＳ３）。この溶解性繊維を混入した注入材６は、固化材、安定材及び助材からなる裏込めＡ液と、水ガラス系の急硬材Ｂ液とを配合調整して粘性を持たせたものに、５℃以下の冷却水により膨潤状態にした、溶解性繊維を均等に混入したものである。この溶解性繊維は、確実なアルカリ分解性及び熱溶解性を有する材料である。そのため、固化した注入材６の中で繊維が溶解することにより、透水性多孔質体からなる排水体８が形成される。ここで、注入管４は残してもよいし、注入材６が固化する前に、引き抜いて除去するようにしてもよい。
Next, as shown in FIG. 1B, the injection tube 4 is inserted into the formed hole 3 and the mouth 5 is closed (step S2).
Next, as shown in FIG.1 (c), the injection material 6 which mixed the soluble fiber is inject | poured in the drilling hole 3 through the injection pipe 4, and is filled (step S3). The injection material 6 mixed with this soluble fiber is a mixture of a backfill A liquid composed of a solidifying material, a stabilizing material and an auxiliary material, and a water glass-based quick hard material B liquid to adjust the viscosity. A soluble fiber that has been swollen with cooling water of 5 ° C. or lower is mixed uniformly. This soluble fiber is a material having reliable alkali decomposability and heat solubility. Therefore, when the fibers are dissolved in the solidified injection material 6, a drainage body 8 made of a water-permeable porous body is formed. Here, the injection tube 4 may be left, or may be pulled out and removed before the injection material 6 is solidified.
このように施工することにより、図２に示すような、透水性多孔質体からなる排水体を用いた斜面安定化工法による斜面安定化構造を構築することができる。
図３は本発明の実施例を示す注入材を用いた排水体の一例を示す図である。
この図に示すように、透水性多孔質体からなる排水体８が削孔３内に形成されることになる。
By constructing in this way, it is possible to construct a slope stabilization structure by a slope stabilization method using a drainage body made of a water-permeable porous body as shown in FIG.
FIG. 3 is a view showing an example of a drainage body using an injection material according to an embodiment of the present invention.
As shown in this figure, a drainage body 8 made of a water-permeable porous body is formed in the hole 3.
本発明によれば、溶解性繊維が混入された注入材６からなる排水体８を削孔３内に形成するようにした。よって、地山１から集水された水は、透水性多孔質体からなる排水体８を通じて斜面２から排出することができる。つまり、通水機能をもつ透水性多孔質体からなる排水体８によって地山１の地下水を集水し、斜面２から円滑に排出することができるので、斜面安定化工法として有効である。 According to the present invention, the drainage body 8 made of the injection material 6 mixed with the soluble fiber is formed in the hole 3. Therefore, the water collected from the natural ground 1 can be discharged | emitted from the slope 2 through the drainage body 8 which consists of a water-permeable porous body. That is, groundwater in the natural ground 1 can be collected and drained smoothly from the slope 2 by the drainage body 8 made of a water-permeable porous body having a water-permeable function, which is effective as a slope stabilization method.
本発明では、溶解性繊維の量を調整することにより、所定の通水性を確保でき、透水性多孔質体からなる排水体８の直径は任意に変えることが可能であり、地山の斜面の滑動力に応じた周面摩擦力を得ることが可能である。
よって、排水機能を備えた補強土工の施工が可能となり、地山の斜面の効果的な補強を安価に行うことができる。
In the present invention, by adjusting the amount of the soluble fiber, a predetermined water permeability can be secured, and the diameter of the drainage body 8 made of a water-permeable porous body can be arbitrarily changed. It is possible to obtain a peripheral frictional force according to the sliding force.
Therefore, it is possible to construct a reinforced earth work having a drainage function, and to effectively reinforce the slope of the natural ground at a low cost.
なお、本発明は上記実施例に限定されるものではなく、本発明の趣旨に基づき種々の変形が可能であり、これらを本発明の範囲から排除するものではない。 In addition, this invention is not limited to the said Example, Based on the meaning of this invention, a various deformation | transformation is possible and these are not excluded from the scope of the present invention.
本発明の注入材を用いた排水体による斜面安定化工法は、地山の地下水の排水を簡便に、しかも良好に行うことができる斜面安定化工法として利用可能である。 The slope stabilization method using a drainage body using the injection material of the present invention can be used as a slope stabilization method that can easily and satisfactorily drain groundwater from a natural mountain.
１ 地山
２ 斜面
３ 削孔
４ 注入管
５ 口元
６ 溶解性繊維を混入した注入材
７ 充填機
８ 透水性多孔質体からなる排水体
DESCRIPTION OF SYMBOLS 1 Ground mountain 2 Slope 3 Drilling hole 4 Injection pipe 5 Mouth 6 Injection material mixed with soluble fiber 7 Filling machine 8 Drainage body consisting of permeable porous body
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