復雜固結(jié)排水系統(tǒng)的研究
發(fā)布時間：2018-12-29 13:12
【摘要】：在實際軟土地基處理工程中,砂井/排水板打設(shè)深度內(nèi)形成的一般都是多層豎井地基。多層豎井地基固結(jié)理論的求解過程,是極為復雜的。求解需要滿足土層與土層之間的孔壓連續(xù)、流量連續(xù)條件,以及砂井內(nèi)部不同層之間的孔壓連續(xù)、流量連續(xù)條件。而由于孔壓表達式中存在無窮級數(shù),將使得多層豎井地基的固結(jié)度解答存在收斂性問題,這一點,讓求解過程變得更為困難。目前的多層豎井地基固結(jié)度解答,要么未完全考慮最終固結(jié)度的影響因素(井阻、涂抹效應(yīng)),要么是停滯在雙層的結(jié)果而無法推廣至更多層。本文基于唐曉武的豎井地基固結(jié)解,求得了三層以及多層豎井地基固結(jié)度的解答,并對收斂性問題進行了分析。 傳統(tǒng)海涂圍堤以土石結(jié)構(gòu)為主,堤心填石料,堤內(nèi)填淤泥,形成擋潮閉氣結(jié)構(gòu)。目前由于受到國家政策限制以及土石資源的消耗,土石資源已經(jīng)嚴重匱乏,充泥模袋作為一種新型的填筑材料應(yīng)運而生。國內(nèi)外目前關(guān)于土工模袋的研究多集中在模袋的受力、充填、滲透特性,對于模袋土體的固結(jié)問題則研究甚少,而關(guān)于排水板充泥模袋的固結(jié)問題更是未有先例。本文求得了正方形影響區(qū)豎井地基固結(jié)度的解答,在考慮了邊界透水性之后,將其解答應(yīng)用于排水板充泥模袋固結(jié)問題的估算,發(fā)現(xiàn)其估算結(jié)果與有限元計算結(jié)果以及實際室內(nèi)實驗結(jié)果一致。 本文的具體工作如下： 1.本文得到了三層豎井地基固結(jié)度解答。推導過程中證明了多層豎井地基的正交關(guān)系,并求得了不同的邊界情況下的三層豎井地基固結(jié)度解答。三層豎井地基固結(jié)度結(jié)果存在不收斂的情況。在GPA/MPA參數(shù)異常嚴重的情況下,固結(jié)度將不再收斂。在GPA/MPA參數(shù)異常不嚴重的情況下,可以通過兩步控制法改善最終固結(jié)度的精度。本章研究了兩步控制法的適用范圍,并具體闡述了運用兩步控制法的操作流程。本文運用兩步控制法改善了計算精度,并計算了樂清電廠海堤填筑工程的孔壓,得到了與實測結(jié)果相吻合的結(jié)果。 2.本文求得了多層豎井地基固結(jié)度的遞推解解答以及擴大矩陣的解答。遞推解解答的計算結(jié)果表明,由于雙曲函數(shù)的存在,傳遞矩陣具有離散性,矩陣的連乘使得傳遞矩陣的離散性放大、計算誤差增加,而判定矩陣本身具有不穩(wěn)定性,這些原因綜合起來導致了結(jié)果的不收斂。而通過擴大矩陣能夠得到收斂的多層豎井地基固結(jié)度解答,其求解關(guān)鍵在于擴大連續(xù)矩陣的大小 3.本文利用擴大矩陣的方法求得了多層豎井地基固結(jié)度解答的通用表達式。本文以四層豎井地基為例,進行了相關(guān)的固結(jié)分析。本文將四層豎井地基計算結(jié)果與雙層豎井地基固結(jié)理論計算結(jié)果進行了對比驗證,結(jié)果證明兩者得到完全相同的結(jié)果。本文進行了四層豎井地基固結(jié)性狀的計算分析,分析了四層豎井地基參數(shù)變化對固結(jié)度的影響,提供參考性的結(jié)論。 4.本文求得了考慮邊界透水性的豎井正方形地基固結(jié)度解答。通過等效面積計算,對比了與六邊形影響區(qū)、圓形影響區(qū)結(jié)果的差別大小,證明了將正方形影響區(qū)簡化為圓形影響區(qū)會差生較大的誤差。在考慮了邊界透水性之后,本文將該理論應(yīng)用于打設(shè)排水板充泥模袋體系的固結(jié)度估算,得到與室內(nèi)實驗一致的結(jié)果。本文利用有限元及正方形影響區(qū)豎井地基解答對打設(shè)／不打設(shè)排水板情況下充泥模袋的固結(jié)情況進行了比較,并利用有限元研究了模袋寬高比變化及模袋高度單因素變化對固結(jié)速率的影響。經(jīng)過計算,為工程實際中的模袋寬高比設(shè)計提出了寬高比為4：1的設(shè)計建議。 5.本文為考慮邊界透水性的豎井正方形固結(jié)度解答考慮了更為實際的因素,包括不同的滲透系數(shù)分布模式以及考慮土體的非線性因素,并得到了相應(yīng)條件下的固結(jié)度表達式。通過非線性固結(jié)的參數(shù)分析,得出結(jié)論,在考慮土體的非線性因素時,土體表面的荷載以及土體的自身屬性將影響到整體的固結(jié)速度。研究使理論能參照實際,提供多種因素條件下最終固結(jié)度的解答,方便與實際結(jié)果對照。
[Abstract]:In the actual soft soil foundation treatment project, the sand well/ drainage board is generally formed in the depth of the foundation of the multi-layer shaft. The solution process of the consolidation theory of multi-layer shaft foundation is very complicated. the solution needs to satisfy the continuous and continuous flow conditions of the pore pressure between the soil layer and the soil layer, and the continuous and continuous flow conditions of the pore pressure between the different layers in the sand well. Because of the infinite series in the pore pressure expression, the convergence problem of the consolidation degree of the multi-layer shaft foundation is solved, which makes the solution process more difficult. At present, the consolidation degree of multi-layer shaft foundation is solved, or the influence factor (well resistance, application effect) of the final consolidation degree is not fully considered, or the result of the double layer can not be extended to more layers. In this paper, the solution of consolidation degree of three-layer and multi-layer shaft foundation is obtained based on the consolidation solution of the shaft foundation of the Tang Xiaowu, and the convergence problem is analyzed. The traditional sea-coated dike is mainly composed of soil-rock structure, and the dike core is filled with stone, and the sludge is filled in the bank to form a water-blocking closed-gas junction. As a result of the limitation of the national policy and the consumption of the earth and rock resources, the soil and rock resources have been severely scarce, and the mud-filling mold bag is used as a new type of filling material. At present, the research on the soil-working mould bag at home and abroad is mainly focused on the stress, filling and permeability of the mould bag, and the research on the consolidation of the mould-bag soil is very few, and the consolidation problem of the drainage plate-filling mould bag is not first In this paper, the solution of the consolidation degree of the vertical shaft foundation of the square influence area is obtained. After the boundary water permeability is considered, the solution is applied to the estimation of the consolidation problem of the drainage plate charging die bag, and the results of the estimation and the results of the finite element calculation and the experimental results in the actual room are found. A. The specific work of this article The method is as follows: 1. The three-layer shaft foundation is obtained in this paper. In the derivation, the orthogonal relation of the multi-layer shaft foundation is proved, and the three-layer shaft foundation under different boundary conditions is obtained. The consolidation degree solution. The consolidation degree result of the three-layer shaft foundation does not exist. The condition of convergence. The degree of consolidation is the case where the GPB/ MPA parameter is abnormal. It will no longer converge. The final solid can be improved by a two-step control method in the case of a non-serious GPB/ MPA parameter The application of two-step control method is studied in this chapter, and the two-step control method is described in detail. In this paper, the calculation accuracy is improved by two-step control method, and the hole pressure of the filling project of the embankment in the Leqing Power Plant is calculated, and the results are compared with the measured results. The result of the agreement is as follows: 2. The recursive solution of the consolidation degree of the multi-layer shaft foundation is obtained in this paper. The calculation results of the extended matrix show that, due to the existence of the hyperbolic function, the transfer matrix has the discreteness, the continuous multiplication of the matrix causes the discreteness of the transfer matrix to be amplified, the error is increased, and the decision matrix itself has instability, which can be combined The convergence of the multi-layer shaft foundation with convergence can be obtained by expanding the matrix, and the key to the solution is to expand. The size of the large continuous matrix is 3. The method of expanding the matrix is used to obtain the consolidation of the multi-layer shaft foundation. A general expression of the degree solution. In this paper, a four-layer shaft foundation is used as an example. In this paper, the calculation results of the four-layer shaft foundation and the calculation results of the consolidation theory of the double-layer shaft foundation are compared and verified, and the results prove that both In this paper, the calculation and analysis of consolidation character of four-layer shaft foundation are carried out, and the effect of the change on consolidation degree of four-layer shaft foundation is analyzed. and provides a reference conclusion. The consolidation degree of the square foundation of the well is solved. By the equivalent area calculation, the difference between the results of the hexagonal influence area and the circular effect area is compared, and it is proved that the square influence area is simplified into a circle After considering the water permeability of the boundary, this paper applies the theory to the calculation of the consolidation degree of the bag system with the drainage plate for filling the mud. Based on the results of the agreement with the indoor experiment, this paper makes a comparison of the consolidation of the mud-filled mold bag in the case of the setting/ non-punching drainage board by using the finite element method and the square influence area shaft foundation solution, and studies the change of the aspect ratio of the die bag and the height of the die bag by using the finite element method. The influence of the change of the element on the consolidation rate is calculated, and the design of the aspect ratio of the mode bag in the practical engineering of the project is given. A design proposal with a high ratio of 4: 1 is proposed. 5. In this paper, a more practical factor is taken into account for the solution of the square consolidation of the vertical shaft considering the water permeability of the boundary, including the distribution pattern of different permeability coefficients and the non-linear factors of the soil. The consolidation degree expression under the corresponding conditions is obtained. Through the analysis of the parameters of the non-linear consolidation, it is concluded that the load on the surface of the soil and the self of the soil body when considering the non-linear factors of the soil The properties will affect the consolidation speed of the whole. The study makes the theory reference to the reality and provides the ultimate degree of consolidation under various factors.
【學位授予單位】：浙江大學
【學位級別】：博士
【學位授予年份】：2014
【分類號】：TU472
本文編號：2394872
[Abstract]:In the actual soft soil foundation treatment project, the sand well/ drainage board is generally formed in the depth of the foundation of the multi-layer shaft. The solution process of the consolidation theory of multi-layer shaft foundation is very complicated. the solution needs to satisfy the continuous and continuous flow conditions of the pore pressure between the soil layer and the soil layer, and the continuous and continuous flow conditions of the pore pressure between the different layers in the sand well. Because of the infinite series in the pore pressure expression, the convergence problem of the consolidation degree of the multi-layer shaft foundation is solved, which makes the solution process more difficult. At present, the consolidation degree of multi-layer shaft foundation is solved, or the influence factor (well resistance, application effect) of the final consolidation degree is not fully considered, or the result of the double layer can not be extended to more layers. In this paper, the solution of consolidation degree of three-layer and multi-layer shaft foundation is obtained based on the consolidation solution of the shaft foundation of the Tang Xiaowu, and the convergence problem is analyzed. The traditional sea-coated dike is mainly composed of soil-rock structure, and the dike core is filled with stone, and the sludge is filled in the bank to form a water-blocking closed-gas junction. As a result of the limitation of the national policy and the consumption of the earth and rock resources, the soil and rock resources have been severely scarce, and the mud-filling mold bag is used as a new type of filling material. At present, the research on the soil-working mould bag at home and abroad is mainly focused on the stress, filling and permeability of the mould bag, and the research on the consolidation of the mould-bag soil is very few, and the consolidation problem of the drainage plate-filling mould bag is not first In this paper, the solution of the consolidation degree of the vertical shaft foundation of the square influence area is obtained. After the boundary water permeability is considered, the solution is applied to the estimation of the consolidation problem of the drainage plate charging die bag, and the results of the estimation and the results of the finite element calculation and the experimental results in the actual room are found. A. The specific work of this article The method is as follows: 1. The three-layer shaft foundation is obtained in this paper. In the derivation, the orthogonal relation of the multi-layer shaft foundation is proved, and the three-layer shaft foundation under different boundary conditions is obtained. The consolidation degree solution. The consolidation degree result of the three-layer shaft foundation does not exist. The condition of convergence. The degree of consolidation is the case where the GPB/ MPA parameter is abnormal. It will no longer converge. The final solid can be improved by a two-step control method in the case of a non-serious GPB/ MPA parameter The application of two-step control method is studied in this chapter, and the two-step control method is described in detail. In this paper, the calculation accuracy is improved by two-step control method, and the hole pressure of the filling project of the embankment in the Leqing Power Plant is calculated, and the results are compared with the measured results. The result of the agreement is as follows: 2. The recursive solution of the consolidation degree of the multi-layer shaft foundation is obtained in this paper. The calculation results of the extended matrix show that, due to the existence of the hyperbolic function, the transfer matrix has the discreteness, the continuous multiplication of the matrix causes the discreteness of the transfer matrix to be amplified, the error is increased, and the decision matrix itself has instability, which can be combined The convergence of the multi-layer shaft foundation with convergence can be obtained by expanding the matrix, and the key to the solution is to expand. The size of the large continuous matrix is 3. The method of expanding the matrix is used to obtain the consolidation of the multi-layer shaft foundation. A general expression of the degree solution. In this paper, a four-layer shaft foundation is used as an example. In this paper, the calculation results of the four-layer shaft foundation and the calculation results of the consolidation theory of the double-layer shaft foundation are compared and verified, and the results prove that both In this paper, the calculation and analysis of consolidation character of four-layer shaft foundation are carried out, and the effect of the change on consolidation degree of four-layer shaft foundation is analyzed. and provides a reference conclusion. The consolidation degree of the square foundation of the well is solved. By the equivalent area calculation, the difference between the results of the hexagonal influence area and the circular effect area is compared, and it is proved that the square influence area is simplified into a circle After considering the water permeability of the boundary, this paper applies the theory to the calculation of the consolidation degree of the bag system with the drainage plate for filling the mud. Based on the results of the agreement with the indoor experiment, this paper makes a comparison of the consolidation of the mud-filled mold bag in the case of the setting/ non-punching drainage board by using the finite element method and the square influence area shaft foundation solution, and studies the change of the aspect ratio of the die bag and the height of the die bag by using the finite element method. The influence of the change of the element on the consolidation rate is calculated, and the design of the aspect ratio of the mode bag in the practical engineering of the project is given. A design proposal with a high ratio of 4: 1 is proposed. 5. In this paper, a more practical factor is taken into account for the solution of the square consolidation of the vertical shaft considering the water permeability of the boundary, including the distribution pattern of different permeability coefficients and the non-linear factors of the soil. The consolidation degree expression under the corresponding conditions is obtained. Through the analysis of the parameters of the non-linear consolidation, it is concluded that the load on the surface of the soil and the self of the soil body when considering the non-linear factors of the soil The properties will affect the consolidation speed of the whole. The study makes the theory reference to the reality and provides the ultimate degree of consolidation under various factors.
【學位授予單位】：浙江大學
【學位級別】：博士
【學位授予年份】：2014
【分類號】：TU472
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