JP6773282B2 - Construction management method of earth pressure shield method, construction management equipment and earth pressure shield excavator - Google Patents
Construction management method of earth pressure shield method, construction management equipment and earth pressure shield excavator Download PDFInfo
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本発明は、土圧式シールド工法の施工管理方法、施工管理装置および土圧式シールド掘削機に関するものである。 The present invention relates to a construction management method of a soil pressure shield method, a construction management device, and a soil pressure shield excavator.
従来、シールドトンネル工事に適用される土圧式シールド工法が知られている。この工法は、カッター装置の背後に掘削土を取り込むためのチャンバーを設けた土圧式シールド掘削機を用いて、チャンバー内に取り込んだ掘削土に対して加水ベントナイトや高分子材料等の薬液等の加泥材（添加材）を添加して攪拌翼で攪拌することにより、掘削土に所定の塑性流動性を持たせてその土圧を切羽に作用させて切羽を安定に保持しつつ掘進を行う工法である。 Conventionally, the earth pressure type shield method applied to the shield tunnel construction is known. In this construction method, a soil pressure type shield excavator equipped with a chamber for taking in excavated soil behind the cutter device is used, and water-hydrated bentonite, chemicals such as polymer materials, etc. are added to the excavated soil taken into the chamber. A construction method in which mud material (additive material) is added and the excavated soil is stirred with a stirring blade to give the excavated soil a predetermined plastic fluidity and the soil pressure is applied to the face to stably hold the face while excavating. Is.
この土圧式シールド工法においては、掘削土による土圧を切羽に対して均一かつ安定に作用させることが重要であるため、チャンバー内における掘削土の塑性流動性を適切に設定しかつ安定に維持する必要がある。そのためには掘削土がチャンバー内全体において均一に塑性流動化しているか否かを掘削中に逐次確認する必要がある。特に昨今においては土圧式シールド工法の大断面化に伴い、チャンバー内の掘削土の塑性流動性を評価するニーズが高まっている。従来の掘削土の塑性流動性を評価し、可視化する技術としては、例えば特許文献１〜４に記載の技術が知られている。 In this earth pressure type shield method, it is important that the earth pressure from the excavated soil acts uniformly and stably on the face, so the plastic fluidity of the excavated soil in the chamber is appropriately set and maintained stable. There is a need. For that purpose, it is necessary to sequentially confirm during excavation whether or not the excavated soil is uniformly plastically fluidized in the entire chamber. In particular, in recent years, with the increase in the cross section of the soil pressure shield method, there is an increasing need to evaluate the plastic fluidity of excavated soil in a chamber. As a technique for evaluating and visualizing the plastic fluidity of conventional excavated soil, for example, the techniques described in Patent Documents 1 to 4 are known.
また、この技術に関連し、本発明者らは現時点で未公開の特許文献５（特願２０１５−１４１７４３号）、特許文献６（特願２０１５−０５１０２６号）および特許文献７（特願２０１５−１３６３９９号）を既に提案している。 Further, in relation to this technique, the present inventors have patent documents 5 (Japanese Patent Application No. 2015-141743), Patent Document 6 (Japanese Patent Application No. 2015-051026) and Patent Document 7 (Japanese Patent Application No. 2015-2015) which have not been published at present. No. 136399) has already been proposed.
特許文献１は、チャンバーに設置した回転体のトルクから掘削土の塑性流動性を定性的に判定する方法であり、塑性流動性を定量的に評価することはできない。 Patent Document 1 is a method of qualitatively determining the plastic fluidity of excavated soil from the torque of a rotating body installed in a chamber, and the plastic fluidity cannot be quantitatively evaluated.
特許文献２および特許文献３は、チャンバーに設置した回転体のトルクから塑性流動性や流動方向を定量的に評価し、事前に解析的にチャンバー内の塑性流動状態を推定したものと比較することで管理する方法である。これらは特殊な回転装置を用いた評価方法であるため、故障が発生する可能性が高い。ここでの解析は、従来の数値解析法（例えば、差分法、ＦＥＭ、ＤＥＭ等）を用いることが前提となっているが、高粘度大変形流動によって数値的に不安定な現象がおき、解析に不具合が生じることもある。 Patent Documents 2 and 3 quantitatively evaluate the plastic fluidity and the flow direction from the torque of the rotating body installed in the chamber, and compare them with those in which the plastic flow state in the chamber is estimated analytically in advance. It is a method of managing with. Since these are evaluation methods using a special rotating device, there is a high possibility that a failure will occur. The analysis here is premised on using a conventional numerical analysis method (for example, difference method, FEM, DEM, etc.), but a phenomenon of numerical instability occurs due to high viscosity and large deformation flow, and the analysis is performed. May cause problems.
特許文献４および特許文献５は、土圧計の変動状態から塑性流動性を間接的に評価する方法であり、直接的な評価を行うものではない。 Patent Document 4 and Patent Document 5 are methods for indirectly evaluating plastic fluidity from a fluctuating state of a soil pressure gauge, and do not directly evaluate.
特許文献６は、チャンバーに設置した回転体のトルクから塑性流動性を定量的に評価する方法であるが、特許文献２および特許文献３同様、特殊な回転装置を用いた評価方法であるため、装置の開発・設置費用や、故障発生のおそれがある。 Patent Document 6 is a method of quantitatively evaluating plastic fluidity from the torque of a rotating body installed in a chamber, but like Patent Documents 2 and 3, it is an evaluation method using a special rotating device. There is a risk of equipment development / installation costs and failure.
特許文献７は、粒子法解析（ＭＰＳ解析）によりチャンバー内の撹拌流動状態を推定する方法である。ただし、土の塑性流動性（塑性粘度、降伏値等）をパラメータとして仮定する必要があるため、適用方法に課題がある。 Patent Document 7 is a method of estimating a stirring flow state in a chamber by particle method analysis (MPS analysis). However, since it is necessary to assume the plastic fluidity of soil (plastic viscosity, yield value, etc.) as parameters, there is a problem in the application method.
これらの技術は塑性流動性を評価するまでの技術であり、その評価結果に基づいた施工管理方法（例えば加泥材の添加方法）については言及されていない。 These techniques are techniques up to the evaluation of plastic fluidity, and the construction management method (for example, the method of adding mud material) based on the evaluation result is not mentioned.
ところで、従来の現場では、排土されてきた掘削土の塑性流動性を目視や触診で確認しながら、チャンバーに対する加泥材の注入位置や注入流量の調整を行っている。なお、加泥材の注入位置については、カッターに取り付けられている複数の注入口から選択している。 By the way, in the conventional field, the injection position and the injection flow rate of the mud material are adjusted to the chamber while visually and palpating the plastic fluidity of the excavated soil that has been discharged. The injection position of the mud material is selected from a plurality of injection ports attached to the cutter.
チャンバーに注入した加泥材は、これまでチャンバー内で一様に拡散していると考えられてきた。しかし、本発明者がチャンバー内に加泥材を注入した状況を模擬した可視化実験を行ったところ、図５に示すように、加泥材は注入した位置の同心円上のみ拡散し、特に中間部は模擬泥土と供回りしているだけであまり拡散が進まないことがわかった。 It has been thought that the mud material injected into the chamber is uniformly diffused in the chamber. However, when the present inventor conducted a visualization experiment simulating the situation where the mud material was injected into the chamber, as shown in FIG. 5, the mud material diffused only on the concentric circles at the injection position, especially in the middle portion. It was found that the diffusion did not progress so much just by accommodating with the simulated mud.
以上の状況を鑑み、本発明者は、実工事で注入位置と注入量を変えた場合の加泥材の拡散状況がある程度予測できれば、加泥材の注入方法の合理化が図れると考え、上記の特許文献７にも記載されている粒子法解析を利用した施工管理方法（加泥材の注入方法）を検討した。しかし、現在のところ粒子法解析は計算に膨大な時間が必要であり、刻々と状況が変化する現場で解析している時間的な余裕はない。そこで、粒子法解析による予測結果を現場管理に利用する以下の本発明を考案した。 In view of the above situation, the present inventor considers that the method of injecting the mud material can be rationalized if the diffusion state of the mud material can be predicted to some extent when the injection position and the injection amount are changed in the actual construction. A construction management method (injection method of mud material) using the particle method analysis described in Patent Document 7 was examined. However, at present, particle method analysis requires a huge amount of time for calculation, and there is not enough time to analyze in the field where the situation changes from moment to moment. Therefore, the following invention has been devised in which the prediction result by the particle method analysis is used for on-site management.
本発明は、上記に鑑みてなされたものであって、チャンバー内掘削土に対する加泥材の注入方法の合理化を図ることができる土圧式シールド工法の施工管理方法、施工管理装置および土圧式シールド掘削機を提供することを目的とする。 The present invention has been made in view of the above, and is a construction management method, a construction management device, and a soil pressure shield excavation of a soil pressure shield method capable of rationalizing a method of injecting a mud material into the excavated soil in a chamber. The purpose is to provide an opportunity.
上記した課題を解決し、目的を達成するために、本発明に係る土圧式シールド工法の施工管理方法は、チャンバー内に設けられた攪拌部材により、前記チャンバー内の掘削土とここに注入される加泥材を攪拌してこの掘削土に塑性流動性を付与し、この掘削土の土圧を切羽に作用させることによって切羽を安定化しつつ掘進を行う土圧式シールド工法の施工管理方法であって、掘進の前に予め加泥材の注入条件をパラメータとする粒子法解析によるパラメータスタディを行って、前記チャンバー内における前記掘削土の塑性流動状態をパラメータの組み合わせごとに推定する推定ステップと、掘進時に前記チャンバー内における前記掘削土の塑性流動状態を評価する評価ステップと、推定ステップにより推定した推定結果の中から、評価ステップにより評価した塑性流動状態に適する所定の注入条件を選択し、選択した注入条件で加泥材を前記チャンバー内の前記掘削土に注入する注入ステップとを備えることを特徴とする。 In order to solve the above-mentioned problems and achieve the object, the construction management method of the earth pressure type shield method according to the present invention is injected into the excavated soil in the chamber by a stirring member provided in the chamber. It is a construction management method of the earth pressure type shield method that performs excavation while stabilizing the face by stirring the mud material to give plastic fluidity to the excavated soil and applying the soil pressure of this excavated soil to the face. Before excavation, a parameter study by particle method analysis with the injection condition of mud material as a parameter is performed in advance, and an estimation step for estimating the plastic flow state of the excavated soil in the chamber for each combination of parameters and excavation. From the evaluation step for evaluating the plastic flow state of the excavated soil in the chamber and the estimation result estimated by the estimation step, a predetermined injection condition suitable for the plastic flow state evaluated by the evaluation step was selected and selected. It is characterized by comprising an injection step of injecting mud material into the excavated soil in the chamber under injection conditions.
また、本発明に係る他の土圧式シールド工法の施工管理方法は、上述した発明において、推定ステップの粒子法解析は、前記掘削土を粒子の集まりとして表現するとともに、この粒子の動きを計算によって解析する粒子法の解析対象とする一方、前記掘削土を攪拌する前記チャンバー内の形状を多面体で近似して、この多面体をなす面を、前記粒子が通過しないように斥力が生じる仮想的な反発力を分布させた壁による剛体とするとともに、前記攪拌部材を移動可能な移動壁で表現した解析モデルを作成し、作成した前記解析モデルにおける加泥材が注入された前記掘削土の塑性流動状態を流動解析するものであることを特徴とする。 Further, in the construction management method of the other soil pressure type shield method according to the present invention, in the above-described invention, the particle method analysis of the estimation step expresses the excavated soil as a collection of particles and calculates the movement of the particles. While being the subject of analysis by the particle method to be analyzed, the shape inside the chamber that agitates the excavated soil is approximated by a polyhedron, and a repulsive force is generated so that the particles do not pass through the surface forming the polyhedron. An analysis model was created in which the stirring member was represented by a movable moving wall while forming a rigid body with a wall in which the force was distributed, and the plastic flow state of the excavated soil into which the mud-filled material was injected in the created analysis model. It is characterized in that it is for flow analysis.
また、本発明に係る土圧式シールド工法の施工管理装置は、チャンバー内に設けられた攪拌部材により、前記チャンバー内の掘削土とここに注入される加泥材を攪拌してこの掘削土に塑性流動性を付与し、この掘削土の土圧を切羽に作用させることによって切羽を安定化しつつ掘進を行う土圧式シールド工法の施工管理装置であって、掘進の前に予め加泥材の注入条件をパラメータとする粒子法解析によるパラメータスタディを行って、前記チャンバー内における前記掘削土の塑性流動状態をパラメータの組み合わせごとに推定する推定手段と、掘進時に前記チャンバー内における前記掘削土の塑性流動状態を評価する評価手段と、推定手段により推定した推定結果の中から、評価手段により評価した塑性流動状態に適する所定の注入条件を選択し、選択した注入条件で加泥材を前記チャンバー内の前記掘削土に注入する注入手段とを備えることを特徴とする。 Further, in the construction management device of the earth pressure type shield method according to the present invention, the excavated soil in the chamber and the mud-filled material injected therein are agitated by a stirring member provided in the chamber, and the excavated soil is plastic. It is a construction management device of the earth pressure type shield method that imparts fluidity and applies the soil pressure of this excavated soil to the face to stabilize the face and perform excavation, and the conditions for injecting mud material before excavation. An estimation means for estimating the plastic flow state of the excavated soil in the chamber for each combination of parameters by performing a parameter study by particle method analysis using the above as a parameter, and the plastic flow state of the excavated soil in the chamber during excavation. From the evaluation means for evaluating the above and the estimation result estimated by the estimation means, a predetermined injection condition suitable for the plastic flow state evaluated by the evaluation means is selected, and the mud material is used in the chamber under the selected injection condition. It is characterized by being provided with an injection means for injecting into excavated soil.
また、本発明に係る他の土圧式シールド工法の施工管理装置は、上述した発明において、推定手段の粒子法解析は、前記掘削土を粒子の集まりとして表現するとともに、この粒子の動きを計算によって解析する粒子法の解析対象とする一方、前記掘削土を攪拌する前記チャンバー内の形状を多面体で近似して、この多面体をなす面を、前記粒子が通過しないように斥力が生じる仮想的な反発力を分布させた壁による剛体とするとともに、前記攪拌部材を移動可能な移動壁で表現した解析モデルを作成し、作成した前記解析モデルにおける加泥材が注入された前記掘削土の塑性流動状態を流動解析するものであることを特徴とする。 Further, in the construction management device of the other soil pressure type shield method according to the present invention, in the above-described invention, the particle method analysis of the estimation means expresses the excavated soil as a collection of particles and calculates the movement of the particles. While being the subject of analysis by the particle method to be analyzed, the shape inside the chamber that agitates the excavated soil is approximated by a polyhedron, and a repulsive force is generated so that the particles do not pass through the surface forming the polyhedron. An analysis model was created in which the stirring member was represented by a movable moving wall while forming a rigid body with a wall in which the force was distributed, and the plastic flow state of the excavated soil into which the mud-filled material was injected in the created analysis model. It is characterized in that it is for flow analysis.
また、本発明に係る土圧式シールド掘削機は、チャンバー内に設けられた攪拌部材により、前記チャンバー内の掘削土とここに注入される加泥材を攪拌してこの掘削土に塑性流動性を付与し、この掘削土の土圧を切羽に作用させることによって切羽を安定化しつつ掘進を行う土圧式シールド掘削機であって、上述した土圧式シールド工法の施工管理装置を備えることを特徴とする。 Further, in the earth pressure type shield excavator according to the present invention, the excavated soil in the chamber and the mud-filled material injected therein are agitated by a stirring member provided in the chamber to give plastic fluidity to the excavated soil. It is a soil pressure type shield excavator that performs excavation while stabilizing the face by applying the soil pressure of the excavated soil to the face, and is characterized by being provided with the construction management device of the above-mentioned soil pressure type shield method. ..
本発明に係る土圧式シールド工法の施工管理方法によれば、チャンバー内に設けられた攪拌部材により、前記チャンバー内の掘削土とここに注入される加泥材を攪拌してこの掘削土に塑性流動性を付与し、この掘削土の土圧を切羽に作用させることによって切羽を安定化しつつ掘進を行う土圧式シールド工法の施工管理方法であって、掘進の前に予め加泥材の注入条件をパラメータとする粒子法解析によるパラメータスタディを行って、前記チャンバー内における前記掘削土の塑性流動状態をパラメータの組み合わせごとに推定する推定ステップと、掘進時に前記チャンバー内における前記掘削土の塑性流動状態を評価する評価ステップと、推定ステップにより推定した推定結果の中から、評価ステップにより評価した塑性流動状態に適する所定の注入条件を選択し、選択した注入条件で加泥材を前記チャンバー内の前記掘削土に注入する注入ステップとを備えるので、チャンバー内の掘削土に対する加泥材の注入条件（注入位置、注入流量など）の適正化、合理化を図ることができるという効果を奏する。 According to the construction management method of the earth pressure type shield method according to the present invention, the excavated soil in the chamber and the mud-filled material injected therein are agitated by the stirring member provided in the chamber, and the excavated soil is plasticized. It is a construction management method of the earth pressure type shield method that imparts fluidity and applies the soil pressure of this excavated soil to the face to stabilize the face and perform excavation, and the conditions for injecting mud material before excavation. An estimation step of estimating the plastic flow state of the excavated soil in the chamber for each combination of parameters by performing a parameter study by particle method analysis using the above as a parameter, and the plastic flow state of the excavated soil in the chamber at the time of excavation. From the evaluation step for evaluating the above and the estimation result estimated by the estimation step, a predetermined injection condition suitable for the plastic flow state evaluated by the evaluation step is selected, and the mud is used in the chamber under the selected injection condition. Since it is provided with an injection step for injecting into the excavated soil, it is possible to optimize and rationalize the injection conditions (injection position, injection flow rate, etc.) of the mud material into the excavated soil in the chamber.
また、本発明に係る他の土圧式シールド工法の施工管理方法によれば、推定ステップの粒子法解析は、前記掘削土を粒子の集まりとして表現するとともに、この粒子の動きを計算によって解析する粒子法の解析対象とする一方、前記掘削土を攪拌する前記チャンバー内の形状を多面体で近似して、この多面体をなす面を、前記粒子が通過しないように斥力が生じる仮想的な反発力を分布させた壁による剛体とするとともに、前記攪拌部材を移動可能な移動壁で表現した解析モデルを作成し、作成した前記解析モデルにおける加泥材が注入された前記掘削土の塑性流動状態を流動解析するものであるので、解析対象が掘削土のような高粘度で大変形する流動体でも安定的に解析することができ、チャンバー内全体における掘削土の塑性流動状態を安定的に評価することができるという効果を奏する。 Further, according to the construction management method of another soil pressure type shield method according to the present invention, the particle method analysis of the estimation step expresses the excavated soil as a collection of particles and analyzes the movement of the particles by calculation. While being the subject of analysis of the method, the shape inside the chamber that stirs the excavated soil is approximated by a polyhedron, and a virtual repulsive force that generates a repulsive force so that the particles do not pass through the surface forming the polyhedron is distributed. An analysis model was created in which the stirring member was represented by a movable wall, and the plastic flow state of the excavated soil into which the mud-filled material was injected in the created analysis model was analyzed. Therefore, it is possible to stably analyze even a fluid with high viscosity and large deformation such as excavated soil, and to stably evaluate the plastic flow state of the excavated soil in the entire chamber. It has the effect of being able to do it.
また、本発明に係る土圧式シールド工法の施工管理装置によれば、チャンバー内に設けられた攪拌部材により、前記チャンバー内の掘削土とここに注入される加泥材を攪拌してこの掘削土に塑性流動性を付与し、この掘削土の土圧を切羽に作用させることによって切羽を安定化しつつ掘進を行う土圧式シールド工法の施工管理装置であって、掘進の前に予め加泥材の注入条件をパラメータとする粒子法解析によるパラメータスタディを行って、前記チャンバー内における前記掘削土の塑性流動状態をパラメータの組み合わせごとに推定する推定手段と、掘進時に前記チャンバー内における前記掘削土の塑性流動状態を評価する評価手段と、推定手段により推定した推定結果の中から、評価手段により評価した塑性流動状態に適する所定の注入条件を選択し、選択した注入条件で加泥材を前記チャンバー内の前記掘削土に注入する注入手段とを備えるので、チャンバー内の掘削土に対する加泥材の注入条件（注入位置、注入流量など）の適正化、合理化を図ることができるという効果を奏する。 Further, according to the construction management device of the earth pressure type shield method according to the present invention, the excavated soil in the chamber and the mud-filled material injected therein are agitated by the agitating member provided in the chamber, and the excavated soil is agitated. It is a construction management device of the earth pressure type shield method that performs excavation while stabilizing the face by imparting plastic fluidity to the face and applying the soil pressure of this excavated soil to the face. An estimation means for estimating the plastic flow state of the excavated soil in the chamber for each combination of parameters by performing a parameter study by particle method analysis using the injection conditions as parameters, and the plasticity of the excavated soil in the chamber at the time of excavation. From the evaluation means for evaluating the flow state and the estimation result estimated by the estimation means, a predetermined injection condition suitable for the plastic flow state evaluated by the evaluation means is selected, and the mud material is placed in the chamber under the selected injection condition. Since the injection means for injecting into the excavated soil is provided, it is possible to optimize and rationalize the injection conditions (injection position, injection flow rate, etc.) of the mudguard material into the excavated soil in the chamber.
また、本発明に係る他の土圧式シールド工法の施工管理装置によれば、推定手段の粒子法解析は、前記掘削土を粒子の集まりとして表現するとともに、この粒子の動きを計算によって解析する粒子法の解析対象とする一方、前記掘削土を攪拌する前記チャンバー内の形状を多面体で近似して、この多面体をなす面を、前記粒子が通過しないように斥力が生じる仮想的な反発力を分布させた壁による剛体とするとともに、前記攪拌部材を移動可能な移動壁で表現した解析モデルを作成し、作成した前記解析モデルにおける加泥材が注入された前記掘削土の塑性流動状態を流動解析するものであるので、解析対象が掘削土のような高粘度で大変形する流動体でも安定的に解析することができ、チャンバー内全体における掘削土の塑性流動状態を安定的に評価することができるという効果を奏する。 Further, according to the construction management device of another soil pressure type shield method according to the present invention, the particle method analysis of the estimation means expresses the excavated soil as a collection of particles and analyzes the movement of the particles by calculation. While being the subject of analysis of the method, the shape inside the chamber that agitates the excavated soil is approximated by a polyhedron, and a virtual repulsive force that generates a repulsive force so that the particles do not pass through the surface forming the polyhedron is distributed. An analysis model was created in which the stirring member was represented by a movable wall, and the plastic flow state of the excavated soil into which the mud was injected was analyzed. Therefore, it is possible to stably analyze even a fluid whose analysis target is highly viscous and greatly deformed, such as excavated soil, and to stably evaluate the plastic flow state of the excavated soil in the entire chamber. It has the effect of being able to do it.
また、本発明に係る土圧式シールド掘削機によれば、チャンバー内に設けられた攪拌部材により、前記チャンバー内の掘削土とここに注入される加泥材を攪拌してこの掘削土に塑性流動性を付与し、この掘削土の土圧を切羽に作用させることによって切羽を安定化しつつ掘進を行う土圧式シールド掘削機であって、上述した土圧式シールド工法の施工管理装置を備えるので、チャンバー内の掘削土に対する加泥材の注入条件（注入位置、注入流量など）の適正化、合理化を図る土圧式シールド掘削機を提供することができるという効果を奏する。 Further, according to the earth pressure type shield excavator according to the present invention, the excavated soil in the chamber and the mud-filled material injected therein are agitated by a stirring member provided in the chamber and plastically flowed into the excavated soil. It is a soil pressure type shield excavator that digs while stabilizing the face by imparting properties and applying the soil pressure of this excavated soil to the face, and since it is equipped with the construction management device of the above-mentioned soil pressure type shield method, it is a chamber. It has the effect of being able to provide a soil pressure type shield excavator that optimizes and rationalizes the injection conditions (injection position, injection flow rate, etc.) of the mud material into the excavated soil inside.
以下に、本発明に係る土圧式シールド工法の施工管理方法、施工管理装置および土圧式シールド掘削機の実施の形態を図面に基づいて詳細に説明する。なお、この実施の形態によりこの発明が限定されるものではない。 Hereinafter, the construction management method, the construction management device, and the embodiment of the soil pressure shield excavator according to the present invention will be described in detail with reference to the drawings. The present invention is not limited to this embodiment.
［土圧式シールド工法の施工管理方法］
まず、本発明に係る土圧式シールド工法の施工管理方法について説明する。
[Construction management method of earth pressure shield method]
First, a construction management method of the earth pressure shield method according to the present invention will be described.
本発明に係る土圧式シールド工法の施工管理方法は、チャンバー内に設けられた攪拌部材により、チャンバー内の掘削土とここに注入される加泥材を攪拌してこの掘削土に塑性流動性を付与し、この掘削土の土圧を切羽に作用させることによって切羽を安定化しつつ掘進を行う土圧式シールド工法の施工管理方法であり、推定ステップＳ１と評価ステップＳ２と注入ステップＳ３とを備える。 In the construction management method of the earth pressure type shield method according to the present invention, the excavated soil in the chamber and the mud material injected therein are agitated by a stirring member provided in the chamber to give the excavated soil plastic fluidity. It is a construction management method of the earth pressure type shield method in which the excavated soil is applied and the earth pressure of the excavated soil is applied to the face to stabilize the face while excavating, and includes an estimation step S1, an evaluation step S2, and an injection step S3.
ここで、チャンバー内に設けられた攪拌部材は、チャンバー内の掘削土とここに注入される加泥材を攪拌する機能を有する部材であればいかなる部材であってもよく、例えばカッタースポーク側に設置された攪拌翼、カッタースポークとは独立して回転駆動するアジテータ、カッタースポークそのもの、チャンバー隔壁に固定されている固定翼などを例示することができる。したがって、本発明はこのような攪拌部材を備えた土圧式シールド掘削機に適用され得る。 Here, the stirring member provided in the chamber may be any member as long as it has a function of stirring the excavated soil in the chamber and the mud material injected therein, for example, on the cutter spoke side. Examples thereof include an installed stirring blade, an agitator that rotates and drives independently of the cutter spoke, the cutter spoke itself, and a fixed blade fixed to the chamber partition wall. Therefore, the present invention can be applied to a soil pressure type shield excavator provided with such a stirring member.
図１に示すように、推定ステップＳ１は、掘進の前に予め加泥材の注入条件をパラメータとする粒子法解析によるパラメータスタディを行って、チャンバー内における掘削土の塑性流動状態をパラメータの組み合わせごとに推定するものである。 As shown in FIG. 1, in the estimation step S1, a parameter study by particle method analysis using the injection condition of the mud material as a parameter is performed in advance before excavation, and the plastic flow state of the excavated soil in the chamber is combined with the parameters. It is estimated for each.
要するに、粒子法解析は計算に膨大な時間を要するため、掘進の前に粒子法解析により、各現場のシールド掘削機の形状、泥土の粘性条件、加泥材の注入位置、注入流量などの注入条件をいくつか想定したパラメータスタディを実施しておき、その結果を把握しておく。 In short, since the particle method analysis requires a huge amount of time for calculation, the particle method analysis is used before excavation to inject the shape of the shield excavator at each site, the viscosity condition of the mud, the injection position of the mud material, the injection flow rate, etc. Perform a parameter study assuming some conditions and grasp the results.
ここで、推定ステップＳ１の粒子法解析は、例えば上記の特許文献７に記載の方法を用いることができる。この場合、掘削土を粒子の集まりとして表現するとともに、この粒子の動きを計算によって解析する粒子法の解析対象としてモデル化する。このとき掘削土を、適切な方法で粘性パラメータが付与された流動体でモデル化してもよい。この場合、例えば流動体の物性が降伏値と塑性粘度で記述されるビンガム流体でモデル化してもよい。なお、このモデル化においては、流動解析の高速化を図るため、流動時には粘塑性流体となり、不動時には高粘性流体となる等価線形近似でビンガム流体を扱うようにしてもよい。また、ビンガム流体に限らず、例えば、せん断速度と粘度の関係式を与えてモデル化した流動体や、せん断速度とせん断応力の関係を与えてモデル化した流動体などを解析対象の掘削土としてもよい。 Here, for the particle method analysis in the estimation step S1, for example, the method described in Patent Document 7 can be used. In this case, the excavated soil is expressed as a collection of particles, and the movement of the particles is modeled as an analysis target of the particle method that is analyzed by calculation. At this time, the excavated soil may be modeled by a fluid body to which the viscosity parameter is given by an appropriate method. In this case, for example, the physical properties of the fluid may be modeled by a Bingham fluid described by the yield value and the plastic viscosity. In this modeling, in order to speed up the flow analysis, the Bingham fluid may be treated by an equivalent linear approximation that becomes a viscous plastic fluid when flowing and a highly viscous fluid when immobile. Further, not limited to the Bingham fluid, for example, a fluid modeled by giving a relational expression between a shear rate and a viscosity, a fluid body modeled by giving a relational relationship between a shear rate and a shear stress, etc. are used as excavated soil to be analyzed. May be good.
一方、掘削土を攪拌するチャンバー内の形状をポリゴン（多面体）で近似して、ポリゴンをなす面を、粒子が通過しないように斥力が生じる仮想的な反発力を分布させた壁による剛体とする解析モデルを作成する。ここで、チャンバーを形成する外壁の部分は固定ポリゴン壁で、攪拌部材は移動ポリゴン壁（移動壁）で表現する。この移動ポリゴン壁は、回転軸の周りに回転移動可能である。そして、作成した解析モデルにおける加泥材が注入された掘削土の塑性流動状態をコンピュータを用いて流動解析する。 On the other hand, the shape inside the chamber that agitates the excavated soil is approximated by polygons (polyhedrons), and the faces forming the polygons are made rigid bodies by walls that distribute virtual repulsive forces that generate repulsive forces so that particles do not pass through. Create an analytical model. Here, the portion of the outer wall forming the chamber is represented by a fixed polygon wall, and the stirring member is represented by a moving polygon wall (moving wall). This moving polygon wall is rotatable around the axis of rotation. Then, the plastic flow state of the excavated soil into which the mud material is injected in the created analysis model is flow-analyzed using a computer.
図２（１）は、上記の推定ステップＳ１のパラメータスタディにおける加泥材のパラメータ設定例、（２）は設定例のパラメータに対する解析結果例である。円盤状のチャンバー外周部、中間部、中央部からそれぞれ３００Ｌ／ｍｉｎで加泥材を注入した場合の注入開始１２０秒後すなわちカッター１回転後の状況を示している。また、この図においては、泥土要素は消去し、加泥材要素のみを表示している。 FIG. 2 (1) is an example of parameter setting of the mud material in the parameter study of the above estimation step S1, and FIG. 2 (2) is an example of analysis results for the parameters of the setting example. The situation is shown 120 seconds after the start of injection, that is, after one rotation of the cutter, when the mud material is injected at 300 L / min from the outer peripheral portion, the intermediate portion, and the central portion of the disk-shaped chamber. Further, in this figure, the mud element is erased and only the mud element is displayed.
評価ステップＳ２は、掘進時にチャンバー内における掘削土の塑性流動状態を評価するものである。評価する掘削土の塑性流動性は、必要に応じてコンピュータのディスプレイ等に可視化表示することが望ましい。このようにすれば、利用者はカッター回転時にディスプレイの表示内容を監視することでチャンバー内の掘削土の塑性流動性をリアルタイムに精度良く連続的に把握することができる。 The evaluation step S2 evaluates the plastic flow state of the excavated soil in the chamber at the time of excavation. It is desirable to visualize and display the plastic fluidity of the excavated soil to be evaluated on a computer display or the like as necessary. In this way, the user can accurately and continuously grasp the plastic fluidity of the excavated soil in the chamber in real time by monitoring the display contents when the cutter is rotated.
注入ステップＳ３は、上記の推定ステップＳ２により推定した推定結果の中から、評価ステップＳ２により評価した塑性流動状態に適する所定の注入条件を選択し、選択した注入条件で加泥材をチャンバー内の掘削土に注入するものである。 In the injection step S3, a predetermined injection condition suitable for the plastic flow state evaluated in the evaluation step S2 is selected from the estimation results estimated in the above estimation step S2, and the mud material is placed in the chamber under the selected injection condition. It is injected into excavated soil.
本実施の形態では、評価ステップＳ２により例えば図３に示すような塑性流動状態の悪い部分（硬すぎ、軟らかすぎ）が現れた場合、上記のパラメータスタディの結果の中からその状況に適した注入条件（注入位置、注入流量）を選択して実行する。塑性流動状態の硬軟度合の評価については、例えば上記の特許文献４、５に記載の評価方法を適用することができる。 In the present embodiment, when a portion having a poor plastic flow state (too hard or too soft) appears in the evaluation step S2, for example, as shown in FIG. 3, injection suitable for the situation is made from the results of the above parameter study. Select and execute the conditions (injection position, injection flow rate). For the evaluation of the degree of hardness and softness in the plastic flow state, for example, the evaluation methods described in Patent Documents 4 and 5 described above can be applied.
加泥材の注入後、図３に示すような可視化表示された画面で塑性流動状態を評価しながら、加泥材の注入条件を再度選択して実行する（フィードバック処理）。土圧式シールド掘削機の掘進中、この処理を繰り返すことによって、チャンバー内の掘削土の塑性流動状態を良好に保持できるようになる。 After the injection of the mud material, the injection conditions of the mud material are selected and executed again while evaluating the plastic flow state on the visualized screen as shown in FIG. 3 (feedback processing). By repeating this process during excavation of the earth pressure type shield excavator, the plastic flow state of the excavated soil in the chamber can be well maintained.
従来は、経験的に加泥材の注入位置、注入量を設定し、排土された土の塑性流動状態を観察し、微調整を繰り返して施工管理が行われてきた。そのため、塑性流動性の急激な変化に対して対応が遅れるケースも散見されたが、上記の特許文献４、５等に記載の塑性流動性を可視化表示する技術を適用することで素早い対応が取れるようになった。 Conventionally, construction management has been carried out by empirically setting the injection position and injection amount of the mud material, observing the plastic flow state of the discharged soil, and repeating fine adjustment. Therefore, there are some cases where the response to a sudden change in plastic fluidity is delayed, but a quick response can be taken by applying the technology for visualizing and displaying the plastic fluidity described in Patent Documents 4 and 5 above. It became so.
本実施の形態によれば、掘削前に推定ステップＳ２により予め推定した推定結果の中から、掘削時に評価ステップＳ２により評価した塑性流動状態に適する所定の注入条件を選択し、選択した注入条件で加泥材をチャンバー内の掘削土に注入するという簡便な手順により、従来よりも確実で素早い対応が可能となり、チャンバー内掘削土に対する加泥材の注入条件（注入位置、注入流量）の適正化、合理化を図ることができる。なお、不必要な部分に加泥材を多く投入すると、残土を産業廃棄物として排出しなければならなくなるが、本実施の形態によれば、不必要な部分に加泥材を投入しないようにできるので、加泥材使用量の削減につながり、コストダウンが図れる。 According to the present embodiment, a predetermined injection condition suitable for the plastic flow state evaluated in the evaluation step S2 at the time of excavation is selected from the estimation results estimated in advance in the estimation step S2 before excavation, and the selected injection condition is used. The simple procedure of injecting the mud material into the excavated soil in the chamber enables a more reliable and quick response than before, and optimizes the injection conditions (injection position, injection flow rate) of the mud material into the excavated soil in the chamber. , Can be rationalized. If a large amount of mud material is added to unnecessary parts, the residual soil must be discharged as industrial waste. However, according to this embodiment, the mud material should not be added to unnecessary parts. Since it can be done, it leads to reduction of the amount of mud material used and cost reduction can be achieved.
［土圧式シールド工法の施工管理装置］
次に、本発明に係る土圧式シールド工法の施工管理装置について説明する。
[Construction management device for earth pressure shield method]
Next, the construction management device of the earth pressure shield method according to the present invention will be described.
図４に示すように、本発明に係る土圧式シールド工法の施工管理装置１０は、上記の本発明に係る土圧式シールド工法の施工管理方法を装置として具現化したものであり、推定手段１２と、評価手段１４と、注入手段１６とを備える。 As shown in FIG. 4, the construction management device 10 of the earth pressure shield method according to the present invention embodies the construction management method of the earth pressure shield method according to the present invention as an apparatus, and is referred to as the estimation means 12. The evaluation means 14 and the injection means 16 are provided.
推定手段１２は、掘進の前に予め加泥材の注入条件をパラメータとする粒子法解析によるパラメータスタディを行って、チャンバー内における掘削土の塑性流動状態をパラメータの組み合わせごとに推定するものであり、ＣＰＵを有するコンピュータ、推定結果を可視化表示可能なディスプレイなどにより構成することができる。推定手段１２は、上記の推定ステップＳ１と同様の処理を行えるようになっている。 The estimation means 12 performs a parameter study by particle method analysis using the injection condition of the mud material as a parameter in advance before excavation, and estimates the plastic flow state of the excavated soil in the chamber for each combination of parameters. , A computer having a CPU, a display capable of visualizing and displaying the estimation result, and the like. The estimation means 12 can perform the same processing as the estimation step S1 described above.
評価手段１４は、掘進時にチャンバー内における掘削土の塑性流動状態を評価するものであり、ＣＰＵを有するコンピュータ、評価結果を可視化表示可能なディスプレイなどにより構成することができる。評価手段１４は、上記の評価ステップＳ２と同様の処理を行えるようになっている。 The evaluation means 14 evaluates the plastic flow state of the excavated soil in the chamber at the time of excavation, and can be configured by a computer having a CPU, a display capable of visualizing and displaying the evaluation result, and the like. The evaluation means 14 can perform the same processing as the evaluation step S2 described above.
注入手段１６は、推定手段１２により推定した推定結果の中から、評価手段１４により評価した塑性流動状態に適する所定の注入条件を選択し、選択した注入条件で加泥材をチャンバー内の掘削土に注入するものであり、ＣＰＵを有するコンピュータ、所定の位置から加泥材を所定の流量で注入可能な装置により構成することができる。注入手段１６は、上記の注入ステップＳ３と同様の処理を行えるようになっている。 The injection means 16 selects a predetermined injection condition suitable for the plastic flow state evaluated by the evaluation means 14 from the estimation results estimated by the estimation means 12, and excavates the mud material in the chamber under the selected injection condition. It can be configured by a computer having a CPU and a device capable of injecting mud material at a predetermined flow rate from a predetermined position. The injection means 16 can perform the same processing as the above-mentioned injection step S3.
本実施の形態によれば、注入手段１６が掘削前に推定手段１２により予め推定した推定結果の中から、掘削時に評価手段１４により評価した塑性流動状態に適する所定の注入条件を選択し、選択した注入条件で加泥材をチャンバー内の掘削土に注入することにより、従来よりも確実で素早い対応が可能となり、チャンバー内掘削土に対する加泥材の注入条件（注入位置、注入流量）の適正化、合理化を図ることができる。 According to the present embodiment, the injection means 16 selects and selects a predetermined injection condition suitable for the plastic flow state evaluated by the evaluation means 14 at the time of excavation from the estimation results estimated in advance by the estimation means 12 before excavation. By injecting the mud material into the excavated soil in the chamber under the same injection conditions, it is possible to respond more reliably and quickly than before, and the appropriate injection conditions (injection position, injection flow rate) of the mud material into the excavated soil in the chamber. It can be rationalized and rationalized.
［土圧式シールド掘削機］
次に、本発明に係る土圧式シールド掘削機について説明する。
[Soil pressure type shield excavator]
Next, the soil pressure type shield excavator according to the present invention will be described.
本発明に係る土圧式シールド掘削機は、チャンバー内に設けられた攪拌部材により、チャンバー内の掘削土とここに注入される加泥材を攪拌してこの掘削土に塑性流動性を付与し、この掘削土の土圧を切羽に作用させることによって切羽を安定化しつつ掘進を行う土圧式シールド掘削機であって、上記の本発明に係る土圧式シールド工法の施工管理装置１０を備えたものである。したがって、本実施の形態によれば、上記の施工管理装置１０で説明したものと同様の作用効果を奏することができる。 In the soil pressure type shield excavator according to the present invention, the excavated soil in the chamber and the mud-filled material injected therein are agitated by a stirring member provided in the chamber to impart plastic fluidity to the excavated soil. It is a soil pressure type shield excavator that excavates while stabilizing the face by applying the soil pressure of the excavated soil to the face, and is equipped with the construction management device 10 of the soil pressure type shield method according to the present invention. is there. Therefore, according to the present embodiment, it is possible to obtain the same effects as those described in the above-mentioned construction management device 10.
以上説明したように、本発明に係る土圧式シールド工法の施工管理方法によれば、チャンバー内に設けられた攪拌部材により、前記チャンバー内の掘削土とここに注入される加泥材を攪拌してこの掘削土に塑性流動性を付与し、この掘削土の土圧を切羽に作用させることによって切羽を安定化しつつ掘進を行う土圧式シールド工法の施工管理方法であって、掘進の前に予め加泥材の注入条件をパラメータとする粒子法解析によるパラメータスタディを行って、前記チャンバー内における前記掘削土の塑性流動状態をパラメータの組み合わせごとに推定する推定ステップと、掘進時に前記チャンバー内における前記掘削土の塑性流動状態を評価する評価ステップと、推定ステップにより推定した推定結果の中から、評価ステップにより評価した塑性流動状態に適する所定の注入条件を選択し、選択した注入条件で加泥材を前記チャンバー内の前記掘削土に注入する注入ステップとを備えるので、チャンバー内の掘削土に対する加泥材の注入条件（注入位置、注入流量など）の適正化、合理化を図ることができる。 As described above, according to the construction management method of the earth pressure type shield method according to the present invention, the excavated soil in the chamber and the mud material injected therein are agitated by the stirring member provided in the chamber. It is a construction management method of the earth pressure type shield method that imparts plastic fluidity to the excavated soil of the lever and applies the soil pressure of this excavated soil to the face to stabilize the face and perform excavation. An estimation step of estimating the plastic flow state of the excavated soil in the chamber for each combination of parameters by performing a parameter study by particle method analysis using the injection condition of the mud material as a parameter, and the above-mentioned in the chamber at the time of excavation. From the evaluation step for evaluating the plastic flow state of the excavated soil and the estimation result estimated by the estimation step, a predetermined injection condition suitable for the plastic flow state evaluated by the evaluation step is selected, and the mud material is selected under the selected injection condition. Is provided with an injection step for injecting the soil into the excavated soil in the chamber, so that the conditions for injecting the mud material (injection position, injection flow rate, etc.) into the excavated soil in the chamber can be optimized and rationalized.
また、本発明に係る他の土圧式シールド工法の施工管理方法によれば、推定ステップの粒子法解析は、前記掘削土を粒子の集まりとして表現するとともに、この粒子の動きを計算によって解析する粒子法の解析対象とする一方、前記掘削土を攪拌する前記チャンバー内の形状を多面体で近似して、この多面体をなす面を、前記粒子が通過しないように斥力が生じる仮想的な反発力を分布させた壁による剛体とするとともに、前記攪拌部材を移動可能な移動壁で表現した解析モデルを作成し、作成した前記解析モデルにおける加泥材が注入された前記掘削土の塑性流動状態を流動解析するものであるので、解析対象が掘削土のような高粘度で大変形する流動体でも安定的に解析することができ、チャンバー内全体における掘削土の塑性流動状態を安定的に評価することができる。 Further, according to the construction management method of another soil pressure type shield method according to the present invention, the particle method analysis of the estimation step expresses the excavated soil as a collection of particles and analyzes the movement of the particles by calculation. While being the subject of analysis of the method, the shape inside the chamber that stirs the excavated soil is approximated by a polyhedron, and a virtual repulsive force that generates a repulsive force so that the particles do not pass through the surface forming the polyhedron is distributed. An analysis model was created in which the stirring member was represented by a movable wall, and the plastic flow state of the excavated soil into which the mud-filled material was injected in the created analysis model was analyzed. Therefore, it is possible to stably analyze even a fluid with high viscosity and large deformation such as excavated soil, and to stably evaluate the plastic flow state of the excavated soil in the entire chamber. it can.
また、本発明に係る土圧式シールド工法の施工管理装置によれば、チャンバー内に設けられた攪拌部材により、前記チャンバー内の掘削土とここに注入される加泥材を攪拌してこの掘削土に塑性流動性を付与し、この掘削土の土圧を切羽に作用させることによって切羽を安定化しつつ掘進を行う土圧式シールド工法の施工管理装置であって、掘進の前に予め加泥材の注入条件をパラメータとする粒子法解析によるパラメータスタディを行って、前記チャンバー内における前記掘削土の塑性流動状態をパラメータの組み合わせごとに推定する推定手段と、掘進時に前記チャンバー内における前記掘削土の塑性流動状態を評価する評価手段と、推定手段により推定した推定結果の中から、評価手段により評価した塑性流動状態に適する所定の注入条件を選択し、選択した注入条件で加泥材を前記チャンバー内の前記掘削土に注入する注入手段とを備えるので、チャンバー内の掘削土に対する加泥材の注入条件（注入位置、注入流量など）の適正化、合理化を図ることができる。 Further, according to the construction management device of the earth pressure type shield method according to the present invention, the excavated soil in the chamber and the mud-filled material injected therein are agitated by the stirring member provided in the chamber, and the excavated soil is agitated. It is a construction management device of the earth pressure type shield method that performs excavation while stabilizing the face by imparting plastic fluidity to the face and applying the soil pressure of this excavated soil to the face. An estimation means for estimating the plastic flow state of the excavated soil in the chamber for each combination of parameters by performing a parameter study by particle method analysis using the injection conditions as parameters, and the plasticity of the excavated soil in the chamber at the time of excavation. From the evaluation means for evaluating the flow state and the estimation result estimated by the estimation means, a predetermined injection condition suitable for the plastic flow state evaluated by the evaluation means is selected, and the mud material is placed in the chamber under the selected injection condition. Since the injection means for injecting into the excavated soil is provided, it is possible to optimize and rationalize the injection conditions (injection position, injection flow rate, etc.) of the mudguard material into the excavated soil in the chamber.
また、本発明に係る他の土圧式シールド工法の施工管理装置によれば、推定手段の粒子法解析は、前記掘削土を粒子の集まりとして表現するとともに、この粒子の動きを計算によって解析する粒子法の解析対象とする一方、前記掘削土を攪拌する前記チャンバー内の形状を多面体で近似して、この多面体をなす面を、前記粒子が通過しないように斥力が生じる仮想的な反発力を分布させた壁による剛体とするとともに、前記攪拌部材を移動可能な移動壁で表現した解析モデルを作成し、作成した前記解析モデルにおける加泥材が注入された前記掘削土の塑性流動状態を流動解析するものであるので、解析対象が掘削土のような高粘度で大変形する流動体でも安定的に解析することができ、チャンバー内全体における掘削土の塑性流動状態を安定的に評価することができる。 Further, according to the construction management device of another soil pressure type shield method according to the present invention, the particle method analysis of the estimation means expresses the excavated soil as a collection of particles and analyzes the movement of the particles by calculation. While being the subject of analysis of the method, the shape inside the chamber that agitates the excavated soil is approximated by a polyhedron, and a virtual repulsive force that generates a repulsive force so that the particles do not pass through the surface forming the polyhedron is distributed. An analysis model was created in which the stirring member was represented by a movable wall, and the plastic flow state of the excavated soil into which the mud was injected was analyzed. Therefore, it is possible to stably analyze even a fluid whose analysis target is highly viscous and greatly deformed, such as excavated soil, and to stably evaluate the plastic flow state of the excavated soil in the entire chamber. it can.
また、本発明に係る土圧式シールド掘削機によれば、チャンバー内に設けられた攪拌部材により、前記チャンバー内の掘削土とここに注入される加泥材を攪拌してこの掘削土に塑性流動性を付与し、この掘削土の土圧を切羽に作用させることによって切羽を安定化しつつ掘進を行う土圧式シールド掘削機であって、上述した土圧式シールド工法の施工管理装置を備えるので、チャンバー内の掘削土に対する加泥材の注入条件（注入位置、注入流量など）の適正化、合理化を図る土圧式シールド掘削機を提供することができる。 Further, according to the earth pressure type shield excavator according to the present invention, the excavated soil in the chamber and the mud-filled material injected therein are agitated by a stirring member provided in the chamber and plastically flowed into the excavated soil. It is a soil pressure type shield excavator that performs excavation while stabilizing the face by imparting properties and applying the soil pressure of this excavated soil to the face, and since it is equipped with the construction management device of the soil pressure type shield method described above, it is a chamber. It is possible to provide a soil pressure type shield excavator for optimizing and rationalizing the injection conditions (injection position, injection flow rate, etc.) of the mud material into the excavated soil inside.
以上のように、本発明に係る土圧式シールド工法の施工管理方法、施工管理装置および土圧式シールド掘削機は、攪拌部材により、チャンバー内の掘削土を攪拌してこの掘削土に塑性流動性を付与し、この掘削土の土圧を切羽に作用させることによって切羽を安定化しつつ掘進を行う土圧式シールド工法に有用であり、特に、チャンバー内掘削土に対する加泥材の注入方法の合理化を図るのに適している。 As described above, the construction management method, the construction management device, and the soil pressure type shield excavator of the earth pressure type shield method according to the present invention agitate the excavated soil in the chamber by the stirring member to give the excavated soil plastic fluidity. It is useful for the earth pressure type shield method that performs excavation while stabilizing the face by applying the soil pressure of this excavated soil to the face, and in particular, it aims to rationalize the method of injecting mud material into the excavated soil in the chamber. Suitable for.
１０ 土圧式シールド工法の施工管理装置
１２ 推定手段
１４ 評価手段
１６ 注入手段
10 Construction management device for earth pressure shield method 12 Estimating means 14 Evaluation means 16 Injection means
Claims (5)
掘進の前に予め加泥材の注入条件をパラメータとする粒子法解析によるパラメータスタディを行って、前記チャンバー内における前記掘削土の塑性流動状態をパラメータの組み合わせごとに推定する推定ステップと、
掘進時に前記チャンバー内における前記掘削土の塑性流動状態を評価する評価ステップと、
推定ステップにより推定した推定結果の中から、評価ステップにより評価した塑性流動状態に適する所定の注入条件を選択し、選択した注入条件で加泥材を前記チャンバー内の前記掘削土に注入する注入ステップとを備えることを特徴とする土圧式シールド工法の施工管理方法。 The excavated soil in the chamber and the mud material injected therein are agitated by a stirring member provided in the chamber to impart plastic fluidity to the excavated soil, and the earth pressure of the excavated soil acts on the face. It is a construction management method of the earth pressure type shield method that excavates while stabilizing the face by making it.
Prior to excavation, a parameter study is performed by particle method analysis using the injection conditions of the mud material as parameters, and the plastic flow state of the excavated soil in the chamber is estimated for each combination of parameters.
An evaluation step for evaluating the plastic flow state of the excavated soil in the chamber during excavation, and
From the estimation results estimated by the estimation step, a predetermined injection condition suitable for the plastic flow state evaluated by the evaluation step is selected, and the mud material is injected into the excavated soil in the chamber under the selected injection condition. A construction management method of the earth pressure shield method, which is characterized by being provided with.
掘進の前に予め加泥材の注入条件をパラメータとする粒子法解析によるパラメータスタディを行って、前記チャンバー内における前記掘削土の塑性流動状態をパラメータの組み合わせごとに推定する推定手段と、
掘進時に前記チャンバー内における前記掘削土の塑性流動状態を評価する評価手段と、
推定手段により推定した推定結果の中から、評価手段により評価した塑性流動状態に適する所定の注入条件を選択し、選択した注入条件で加泥材を前記チャンバー内の前記掘削土に注入する注入手段とを備えることを特徴とする土圧式シールド工法の施工管理装置。 The excavated soil in the chamber and the mud material injected therein are agitated by a stirring member provided in the chamber to impart plastic fluidity to the excavated soil, and the earth pressure of the excavated soil acts on the face. It is a construction management device of the earth pressure type shield method that excavates while stabilizing the face by making it.
An estimation means for estimating the plastic flow state of the excavated soil in the chamber for each combination of parameters by performing a parameter study by particle method analysis using the injection condition of the mud material as a parameter before excavation.
An evaluation means for evaluating the plastic flow state of the excavated soil in the chamber during excavation, and
From the estimation results estimated by the estimation means, a predetermined injection condition suitable for the plastic flow state evaluated by the evaluation means is selected, and the mud material is injected into the excavated soil in the chamber under the selected injection condition. A construction management device for the earth pressure shield method, which is characterized by being equipped with.
請求項３または４に記載の土圧式シールド工法の施工管理装置を備えることを特徴とする土圧式シールド掘削機。 The excavated soil in the chamber and the mud material injected therein are agitated by a stirring member provided in the chamber to impart plastic fluidity to the excavated soil, and the earth pressure of the excavated soil acts on the face. It is an earth pressure type shield excavator that excavates while stabilizing the face by letting it.
A soil pressure shield excavator comprising the construction management device of the soil pressure shield method according to claim 3 or 4.
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