Calculation method and device for ground surface horizontal deformation of under-consolidated soft soil shield tunnel

Abstract

The invention relates to the technical field of underground engineering, in particular to a calculation method and device for ground surface horizontal deformation of an under-consolidated soft soil shield tunnel. The method comprises the steps that the maximum value of earth surface residual horizontal deformation caused by under-consolidation soft soil foundation consolidation, the horizontal position where the maximum value is located and the earth surface residual horizontal deformation distribution coefficient are determined according to under-consolidation soft soil foundation consolidation, and then earth surface residual horizontal deformation is calculated; based on the shield construction and the shield construction stratum loss rate, earth surface short-term horizontal deformation caused by the shield construction is calculated; calculating the long-term horizontal deformation of the earth surface according to the maximum value of the long-term horizontal deformation of the earth surface caused by shield construction and the horizontal position of the maximum value; and calculating the earth surface long-term horizontal deformation of the under-consolidated soft soil shield tunnel by using the earth surface residual horizontal deformation, the earth surface short-term horizontal deformation and the earth surface long-term horizontal deformation. Therefore, the problems that in the prior art, only for tunnel settlement and structural deformation, deformation analysis on the stratum around the tunnel is lacked, and actual engineering cannot be applied are solved.

Description

Technical Field

[0001] The present application relates to the field of underground engineering technology, and in particular to a method and device for calculating the horizontal deformation of the ground surface of an underconsolidated soft soil shield tunnel. Background Art

[0002] With the continuous advancement of coastal development, my country's coastal cities are building more and more infrastructure projects in the newly reclaimed land and beach reclamation areas. The foundations of these reclamation areas have limited consolidation time after completion and are mostly in an underconsolidated state. When constructing shield tunnels in underconsolidated soft soil areas, the combined effects of stratum loss caused by shield tunnel excavation and self-weight consolidation of underconsolidated soft soil strata make the deformation mode complex and difficult to control.

[0003] In the related technology, the adverse effects of the self-weight consolidation of underconsolidated soft soil on the deformation of shield tunnels are mainly focused on the deformation of the tunnel itself and the settlement of the strata. For example, the tunnel settlement function can be determined based on the settlement of underconsolidated strata over time, and then the convergence deformation of the underconsolidated soft soil shield tunnel structure can be calculated using the tunnel settlement function; the long-term settlement of the strata around the tunnel can also be solved based on the consideration of the consolidation deformation of underconsolidated soft soil and the influence of the disturbance caused by the shield tunnel construction.

[0004] However, in the related technologies, only the settlement and structural deformation of the tunnel itself are analyzed, and the deformation of the strata around the tunnel is lacking. In addition, in actual engineering, the horizontal deformation of the surrounding strata caused by the shield tunnel is an important indicator for judging the impact on the surrounding environment. Therefore, it is necessary to clarify the calculation method of the long-term horizontal deformation of the surface of the shield tunnel in underconsolidated soft soil, so as to provide a basis for the design of shield tunnels in underconsolidated soft soil strata and the safety assessment of their adjacent underground structures. Summary of the invention

[0005] The present application provides a method and device for calculating the horizontal deformation of the ground surface of an underconsolidated soft soil shield tunnel, in order to solve the problems in the related technology that only the settlement and structural deformation of the tunnel itself are analyzed, deformation analysis of the strata around the tunnel is lacking, and a method for calculating the long-term horizontal deformation of the ground surface of an underconsolidated soft soil shield tunnel is not clear, and the method cannot be applied in actual engineering.

[0006] The first aspect of the present application provides a method for calculating the surface horizontal deformation of an underconsolidated soft soil shield tunnel, comprising the following steps: determining the maximum value of the surface residual horizontal deformation caused by the consolidation of the underconsolidated soft soil foundation, the horizontal position of the maximum value of the surface residual horizontal deformation, and the distribution coefficient of the surface residual horizontal deformation according to the consolidation of the underconsolidated soft soil foundation, and calculating the surface residual horizontal deformation caused by the consolidation of the underconsolidated soft soil foundation based on the maximum value of the surface residual horizontal deformation, the horizontal position of the maximum value of the surface residual horizontal deformation, and the distribution coefficient of the surface residual horizontal deformation; calculating the surface residual horizontal deformation caused by the consolidation of the underconsolidated soft soil foundation based on the shield construction and the shield construction stratum loss rate. The invention relates to a method for calculating the short-term horizontal deformation of the ground caused by the underconsolidated soft soil shield construction; based on the shield construction, determining the maximum value of the long-term horizontal deformation of the ground caused by the underconsolidated soft soil shield construction and the horizontal position of the maximum value of the long-term horizontal deformation of the ground, and calculating the long-term horizontal deformation of the ground caused by the underconsolidated soft soil shield construction by using the maximum value of the long-term horizontal deformation of the ground and the horizontal position of the maximum value of the long-term horizontal deformation of the ground; calculating the long-term horizontal deformation of the ground of the underconsolidated soft soil shield tunnel by using the residual horizontal deformation of the ground caused by the consolidation of the underconsolidated soft soil foundation, the short-term horizontal deformation of the ground caused by the underconsolidated soft soil shield construction and the long-term horizontal deformation of the ground caused by the underconsolidated soft soil shield construction.

[0007] Optionally, in one embodiment of the present application, the calculation formula for the residual horizontal deformation of the surface caused by the consolidation of the underconsolidated soft soil foundation may be, but is not limited to,:

[0008]

[0009] Where ΔH c is the residual horizontal deformation of the ground surface caused by the consolidation of underconsolidated soft soil foundation; ΔH cmax is the maximum value of the residual horizontal deformation of the surface caused by the consolidation of the underconsolidated soft soil foundation; b is the horizontal position of the maximum value of the residual horizontal deformation of the surface caused by the consolidation of the underconsolidated soft soil foundation; i is the distribution coefficient of the residual horizontal deformation of the surface caused by the consolidation of the underconsolidated soft soil foundation.

[0010] Optionally, in one embodiment of the present application, the calculation formula for the maximum value of the residual horizontal deformation of the surface caused by the consolidation of the underconsolidated soft soil foundation may be, but is not limited to,:

[0011] ΔH cmax =C1ln[C2(1-U0)+1],

[0012] The calculation formula for the horizontal position of the maximum value of the residual horizontal deformation of the surface caused by the consolidation of the underconsolidated soft soil foundation can be, but is not limited to,:

[0013] b=exp(C3U0+C4)+C5,

[0014] The calculation formula of the distribution coefficient of the residual horizontal deformation of the surface caused by the consolidation of the underconsolidated soft soil foundation can be, but is not limited to,:

[0015] i=exp[-2.4L(1-U0)+2.4]+20.5,

[0016] Among them, C1, C2, C3, C4, C5 are the fitting coefficients in each expression, U0 is the initial consolidation degree of underconsolidated soft soil foundation; L is the thickness of the recent fill on the surface; Among them,

[0017] The calculation formula of C1 can be but is not limited to:

[0018] C1=-3.5L-0.55z+42.57,

[0019] The calculation formula of C2 can be but is not limited to:

[0020] C2=7.3L-0.2z-11.2,

[0021] The calculation formula of C3 can be but is not limited to:

[0022] C3=0.25(z-16.0) 2 +12.2,

[0023] The calculation formula of C4 can be but is not limited to:

[0024] C2=7.3L-0.2z-11.2,

[0025] The calculation formula of C5 can be but is not limited to:

[0026] C5=0.52z+9.0,

[0027] Where z is the depth from the center of the tunnel to the ground surface.

[0028] Optionally, in one embodiment of the present application, the calculation formula for the short-term horizontal deformation of the ground surface caused by the underconsolidated soft soil shield construction may be, but is not limited to,:

[0029]

[0030] Among them, H s V is the short-term ground deformation caused by shield construction in underconsolidated soft soil; L is the stratum loss rate of underconsolidated soft soil shield construction; x is the horizontal distance from the tunnel center; D is the tunnel diameter; v is the stratum Poisson's ratio.

[0031] Optionally, in one embodiment of the present application, the calculation formula for the long-term horizontal deformation of the ground surface caused by the underconsolidated soft soil shield construction may be, but is not limited to,:

[0032]

[0033] Among them, H c is the long-term surface deformation caused by shield construction in underconsolidated soft soil; a is the horizontal position of the maximum value of long-term horizontal surface deformation caused by shield construction in underconsolidated soft soil; H cmax It is the maximum value of long-term horizontal deformation of the ground surface caused by shield construction in underconsolidated soft soil.

[0034] Optionally, in one embodiment of the present application, the calculation formula for the long-term horizontal deformation of the ground surface of the underconsolidated soft soil shield tunnel may be, but is not limited to,:

[0035] H L (x) = H s (x)+H c (x)+ΔH c (x),

[0036] Among them, H L It is the long-term horizontal deformation of the ground surface of a shield tunnel in underconsolidated soft soil.

[0037] The second aspect of the present application provides a device for calculating the surface horizontal deformation of an underconsolidated soft soil shield tunnel, including: a first calculation module, which is used to determine the maximum value of the surface residual horizontal deformation caused by the consolidation of the underconsolidated soft soil foundation, the horizontal position of the maximum value of the surface residual horizontal deformation, and the distribution coefficient of the surface residual horizontal deformation according to the consolidation of the underconsolidated soft soil foundation, and calculate the surface residual horizontal deformation caused by the consolidation of the underconsolidated soft soil foundation based on the maximum value of the surface residual horizontal deformation, the horizontal position of the maximum value of the surface residual horizontal deformation, and the distribution coefficient of the surface residual horizontal deformation; a second calculation module, which is used to calculate the surface residual horizontal deformation caused by the consolidation of the underconsolidated soft soil shield construction based on the shield construction and the shield construction stratum loss rate. short-term horizontal deformation of the surface; a third calculation module, used to determine the maximum value of the long-term horizontal deformation of the surface caused by the underconsolidated soft soil shield construction and the horizontal position of the maximum value of the long-term horizontal deformation of the surface based on the shield construction, and use the maximum value of the long-term horizontal deformation of the surface and the horizontal position of the maximum value of the long-term horizontal deformation of the surface to calculate the long-term horizontal deformation of the surface caused by the underconsolidated soft soil shield construction; a fourth calculation module, used to calculate the long-term horizontal deformation of the surface of the underconsolidated soft soil shield tunnel by using the residual horizontal deformation of the surface caused by the consolidation of the underconsolidated soft soil foundation, the short-term horizontal deformation of the surface caused by the underconsolidated soft soil shield construction, and the long-term horizontal deformation of the surface caused by the underconsolidated soft soil shield construction.

[0038] Optionally, in one embodiment of the present application, the calculation formula for the residual horizontal deformation of the surface caused by the consolidation of the underconsolidated soft soil foundation may be, but is not limited to,:

[0039]

[0040] Where ΔH c is the residual horizontal deformation of the ground surface caused by the consolidation of underconsolidated soft soil foundation; ΔH cmax is the maximum value of the residual horizontal deformation of the surface caused by the consolidation of the underconsolidated soft soil foundation; b is the horizontal position of the maximum value of the residual horizontal deformation of the surface caused by the consolidation of the underconsolidated soft soil foundation; i is the distribution coefficient of the residual horizontal deformation of the surface caused by the consolidation of the underconsolidated soft soil foundation.

[0041] Optionally, in one embodiment of the present application, the calculation formula for the maximum value of the residual horizontal deformation of the surface caused by the consolidation of the underconsolidated soft soil foundation may be, but is not limited to,:

[0042] ΔH cmax =C1ln[C2(1-U0)+1],

[0043] The calculation formula for the horizontal position of the maximum value of the residual horizontal deformation of the surface caused by the consolidation of the underconsolidated soft soil foundation can be, but is not limited to,:

[0044] b=exp(C3U0+C4)+C5,

[0045] The calculation formula of the distribution coefficient of the residual horizontal deformation of the surface caused by the consolidation of the underconsolidated soft soil foundation can be, but is not limited to,:

[0046] i=exp[-2.4L(1-U0)+2.4]+20.5,

[0047] Among them, C1, C2, C3, C4, C5 are the fitting coefficients in each expression, U0 is the initial consolidation degree of underconsolidated soft soil foundation; L is the thickness of the recent fill on the surface; Among them,

[0048] The calculation formula of C1 can be but is not limited to:

[0049] C1=-3.5L-0.55z+42.57,

[0050] The calculation formula of C2 can be but is not limited to:

[0051] C2=7.3L-0.2z-11.2,

[0052] The calculation formula of C3 can be but is not limited to:

[0053] C3=0.25(z-16.0) 2 +12.2,

[0054] The calculation formula of C4 can be but is not limited to:

[0055] C2=7.3L-0.2z-11.2,

[0056] The calculation formula of C5 can be but is not limited to:

[0057] C5=0.52z+9.0,

[0058] Where z is the depth from the center of the tunnel to the ground surface.

[0059] Optionally, in one embodiment of the present application, the calculation formula for the short-term horizontal deformation of the ground surface caused by the underconsolidated soft soil shield construction may be, but is not limited to,:

[0060]

[0061] Among them, H s V is the short-term ground deformation caused by shield construction in underconsolidated soft soil; L is the stratum loss rate of underconsolidated soft soil shield construction; x is the horizontal distance from the tunnel center; D is the tunnel diameter; v is the stratum Poisson's ratio.

[0062] Optionally, in one embodiment of the present application, the calculation formula for the long-term horizontal deformation of the ground surface caused by the underconsolidated soft soil shield construction may be, but is not limited to,:

[0063]

[0064] Among them, H c is the long-term surface deformation caused by shield construction in underconsolidated soft soil; a is the horizontal position of the maximum value of long-term horizontal surface deformation caused by shield construction in underconsolidated soft soil; H cmax It is the maximum value of long-term horizontal deformation of the ground surface caused by shield construction in underconsolidated soft soil.

[0065] Optionally, in one embodiment of the present application, the calculation formula for the long-term horizontal deformation of the ground surface of the underconsolidated soft soil shield tunnel may be, but is not limited to,:

[0066] H L (x) = H s (x)+H c (x)+ΔH c (x),

[0067] Among them, H L It is the long-term horizontal deformation of the ground surface of a shield tunnel in underconsolidated soft soil.

[0068] The third aspect of the present application provides an electronic device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the method for calculating the horizontal deformation of the ground surface of an underconsolidated soft soil shield tunnel as described in the above embodiment.

[0069] The fourth aspect of the present application provides a computer-readable storage medium, which stores a computer program. When the program is executed by a processor, it implements the above method for calculating the horizontal deformation of the surface of an underconsolidated soft soil shield tunnel.

[0070] The fifth aspect of the present application provides a computer program product, including a computer program, which, when executed, implements the above method for calculating the horizontal deformation of the surface of an underconsolidated soft soil shield tunnel.

[0071] The embodiment of the present application can divide the long-term horizontal deformation of the ground surface of the under-consolidated soft soil shield tunnel into three parts: the residual horizontal deformation of the ground surface caused by the consolidation of the under-consolidated soft soil foundation, the short-term horizontal deformation of the ground surface caused by the under-consolidated soft soil shield construction, and the long-term horizontal deformation of the ground surface caused by the under-consolidated soft soil shield construction. The horizontal deformation of each part is gradually obtained, and the combined effect of the shield construction disturbance and the consolidation of the under-consolidated soft soil foundation is comprehensively considered. It can predict the long-term horizontal deformation of the ground surface after the shield construction in the under-consolidated soft soil, thereby providing a basis for the design of the under-consolidated soft soil shield tunnel. The operation is simple, the practicability is strong, and the application value is large. Therefore, the problems that the related technology only focuses on the settlement and structural deformation of the tunnel itself, lacks deformation analysis of the strata around the tunnel, does not clarify the calculation method of the long-term horizontal deformation of the ground surface of the under-consolidated soft soil shield tunnel, and cannot be applied in actual engineering are solved.

[0072] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0073] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0074] Figure 1 A flow chart of a method for calculating the horizontal deformation of the ground surface of an underconsolidated soft soil shield tunnel provided according to an embodiment of the present application;

[0075] Figure 2 A schematic block diagram of a calculated cross section of an underconsolidated soft soil shield tunnel provided according to an embodiment of the present application;

[0076] Figure 3 A schematic diagram of a block diagram of a prediction curve of residual horizontal settlement of the ground surface caused by consolidation of an underconsolidated soft soil foundation provided according to an embodiment of the present application;

[0077] Figure 4 A schematic block diagram of stratum loss in shield construction according to one embodiment of the present application;

[0078] Figure 5A schematic diagram of the long-term horizontal deformation of the ground surface of an underconsolidated soft soil shield tunnel provided according to an embodiment of the present application;

[0079] Figure 6 A schematic diagram of comparison of long-term horizontal deformation of the ground surface provided according to an embodiment of the present application;

[0080] Figure 7 A flowchart of the working principle of a method for calculating the horizontal deformation of a ground surface in an underconsolidated soft soil shield tunnel provided according to an embodiment of the present application;

[0081] Figure 8 A schematic block diagram of a device for calculating horizontal deformation of a ground surface in an underconsolidated soft soil shield tunnel provided according to an embodiment of the present application;

[0082] Fig. 9 It is a schematic diagram of the structure of an electronic device provided according to an embodiment of the present application. DETAILED DESCRIPTION

[0083] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0084] The following describes the calculation method and device of the surface horizontal deformation of the underconsolidated soft soil shield tunnel of the embodiment of the present application with reference to the accompanying drawings. In view of the problem that the above background technology only focuses on the settlement and structural deformation of the tunnel itself, lacks deformation analysis of the strata around the tunnel, does not clarify the calculation method of the long-term horizontal deformation of the surface of the underconsolidated soft soil shield tunnel, and cannot be applied in actual engineering, the present application provides a calculation method of the surface horizontal deformation of the underconsolidated soft soil shield tunnel, in which the long-term horizontal deformation of the surface of the underconsolidated soft soil shield tunnel can be divided into three parts: the residual horizontal deformation of the surface caused by the consolidation of the underconsolidated soft soil foundation, the short-term horizontal deformation of the surface caused by the construction of the underconsolidated soft soil shield, and the long-term horizontal deformation of the surface caused by the construction of the underconsolidated soft soil shield, and the horizontal deformation of each part is gradually obtained, and the combined effect of the disturbance of the shield construction and the consolidation of the underconsolidated soft soil foundation is comprehensively considered, and the long-term horizontal deformation of the surface after the shield construction in the underconsolidated soft soil can be predicted, thereby providing a basis for the design of the underconsolidated soft soil shield tunnel, which is simple to operate, highly practical, and has great application value. This solves the problems in the related technology, such as only focusing on the tunnel's own settlement and structural deformation, lacking deformation analysis of the strata around the tunnel, having no clear calculation method for the long-term horizontal deformation of the surface of underconsolidated soft soil shield tunnels, and being unable to be applied in actual engineering projects.

[0085] Specifically, Figure 1The present invention is a flow chart of a method for calculating the horizontal deformation of the ground surface of an underconsolidated soft soil shield tunnel provided according to an embodiment of the present application.

[0086] like Figure 1 As shown, the calculation method of the horizontal deformation of the ground surface of the underconsolidated soft soil shield tunnel includes the following steps:

[0087] In step S101, the maximum value of the residual horizontal deformation of the surface caused by the consolidation of the underconsolidated soft soil foundation, the horizontal position where the maximum value of the residual horizontal deformation of the surface is located, and the distribution coefficient of the residual horizontal deformation of the surface are determined according to the consolidation of the underconsolidated soft soil foundation, and the residual horizontal deformation of the surface caused by the consolidation of the underconsolidated soft soil foundation is calculated based on the maximum value of the residual horizontal deformation of the surface, the horizontal position where the maximum value of the residual horizontal deformation of the surface is located, and the distribution coefficient of the residual horizontal deformation of the surface. The calculation formula of the residual horizontal deformation of the surface caused by the consolidation of the underconsolidated soft soil foundation can be, but is not limited to,:

[0088]

[0089] Where ΔH c is the residual horizontal deformation of the ground surface caused by the consolidation of underconsolidated soft soil foundation; ΔH cmax is the maximum value of the residual horizontal deformation of the surface caused by the consolidation of the underconsolidated soft soil foundation; b is the horizontal position of the maximum value of the residual horizontal deformation of the surface caused by the consolidation of the underconsolidated soft soil foundation; i is the distribution coefficient of the residual horizontal deformation of the surface caused by the consolidation of the underconsolidated soft soil foundation.

[0090] Among them, the calculation formula for the maximum value of the residual horizontal deformation of the surface caused by the consolidation of the underconsolidated soft soil foundation can be but is not limited to:

[0091] ΔH cmax =C1ln[C2(1-U0)+1],

[0092] The calculation formula for the horizontal position of the maximum residual horizontal deformation of the ground surface caused by the consolidation of underconsolidated soft soil foundation can be, but is not limited to,:

[0093] b=exp(C3U0+C4)+C5,

[0094] The calculation formula for the distribution coefficient of residual horizontal deformation of the surface caused by consolidation of underconsolidated soft soil foundation can be but is not limited to:

[0095] i=exp[-2.4L(1-U0)+2.4]+20.5,

[0096] Among them, C1, C2, C3, C4, C5 are the fitting coefficients in each expression, U0 is the initial consolidation degree of underconsolidated soft soil foundation; L is the thickness of the recent fill on the surface; Among them,

[0097] The calculation formula of C1 can be but is not limited to:

[0098] C1=-3.5L-0.55z+42.57,

[0099] The calculation formula of C2 can be but is not limited to:

[0100] C2=7.3L-0.2z-11.2,

[0101] The calculation formula of C3 can be but is not limited to:

[0102] C3=0.25(z-16.0) 2 +12.2,

[0103] The calculation formula of C4 can be but is not limited to:

[0104] C2=7.3L-0.2z-11.2,

[0105] The calculation formula of C5 can be but is not limited to:

[0106] C5=0.52z+9.0,

[0107] Where z is the depth from the center of the tunnel to the ground surface.

[0108] In some embodiments, the embodiments of the present application can determine the maximum value of the residual horizontal deformation of the surface caused by the consolidation of the underconsolidated soft soil foundation, the horizontal position of the maximum value of the residual horizontal deformation of the surface caused by the consolidation of the underconsolidated soft soil foundation, and the distribution coefficient of the residual horizontal deformation of the surface caused by the consolidation of the underconsolidated soft soil foundation according to the initial consolidation degree of the underconsolidated soft soil foundation, and then calculate the residual horizontal deformation of the surface caused by the consolidation of the underconsolidated soft soil foundation.

[0109] In the embodiment of the present application, the residual horizontal deformation ΔH of the ground surface caused by the consolidation of the underconsolidated soft soil foundation is c The calculation formula can be expressed as but not limited to:

[0110]

[0111] Where ΔH c is the residual horizontal deformation of the ground surface caused by the consolidation of underconsolidated soft soil foundation; ΔH cmax is the maximum value of the residual horizontal deformation of the surface caused by the consolidation of the underconsolidated soft soil foundation; b is the horizontal position of the maximum value of the residual horizontal deformation of the surface caused by the consolidation of the underconsolidated soft soil foundation; i is the distribution coefficient of the residual horizontal deformation of the surface caused by the consolidation of the underconsolidated soft soil foundation.

[0112] Furthermore, in the embodiment of the present application, the maximum residual horizontal deformation of the ground surface caused by the consolidation of the underconsolidated soft soil foundation is ΔH cmax The calculation formula can be expressed as but not limited to:

[0113] ΔH cmax =C1ln[C2(1-U0)+1],

[0114] Further, in the embodiment of the present application, the calculation formula for the horizontal position b where the maximum value of the residual horizontal deformation of the surface caused by the consolidation of the underconsolidated soft soil foundation is located can be expressed as, but not limited to:

[0115] b=exp(C3U0+C4)+C5,

[0116] Further, in the embodiment of the present application, the calculation formula of the surface residual horizontal deformation distribution coefficient i caused by the consolidation of the underconsolidated soft soil foundation can be expressed as but not limited to:

[0117] i=exp[-2.4L(1-U0)+2.4]+20.5,

[0118] Among them, C1, C2, C3, C4, and C5 are the fitting coefficients in each expression; U0 is the initial consolidation degree of underconsolidated soft soil foundation; L is the thickness of the recent fill on the surface.

[0119] Among them, in the embodiment of the present application, the calculation formulas of C1, C2, C3, C4, and C5 can be expressed as but not limited to:

[0120] C1=-3.5L-0.55z+42.57,

[0121] C2=7.3L-0.2z-11.2,

[0122] C3=0.25(z-16.0) 2 +12.2,

[0123] C4=0.23(z-15.8) 2 +9.8,

[0124] C5=0.52z+9.0,

[0125] For example, the present application embodiment provides a schematic diagram of a calculated cross section of an underconsolidated soft soil shield tunnel, such as Figure 2 As shown, the embodiment of the present application selects a typical tunnel section, in which the thickness of the surface recent fill is 3m, the thickness of the underlying soft soil layer is 30m, and the initial consolidation degree of the underconsolidated soft soil foundation is 80%. The diameter of the shield tunnel constructed in the stratum is 6m, the burial depth along the central axis of the tunnel is 18m, and the burial depth from the central axis of the tunnel to the bottom of the fill is 15m.

[0126] At this time, the residual horizontal deformation ΔH of the ground surface caused by the consolidation of the underconsolidated soft soil foundation in the embodiment of the present application is c When , the fitting coefficients in each expression can be taken as:

[0127] C1=-3.5L-0.55z+42.57=-3.5×3-0.55×18+42.57=22.17,

[0128] C2=7.3L-0.2z-11.2=7.3×3-0.2×18-11.2=7.1,

[0129] C3=0.25(z-16.0) 2 +12.2=0.25×(18-16.0) 2 +12.2=13.2,

[0130] C4=0.23(z-15.8) 2 +9.8 = 0.23 × (18 - 15.8) 2 +9.8=10.9,

[0131] C5=0.52z+9.0=0.52×18+9.0=18.36,

[0132] Furthermore, in the embodiment of the present application, the maximum residual horizontal deformation of the ground surface caused by the consolidation of the underconsolidated soft soil foundation is ΔH cmax It can be expressed as, but not limited to:

[0133] ΔH cmax =C1ln[C2(1-U0)+1]=22.17×ln[7.1×(1-0.8)+1]=19.59mm,

[0134] The horizontal position b of the maximum residual horizontal deformation of the ground surface caused by the consolidation of underconsolidated soft soil foundation can be expressed as, but not limited to:

[0135] b=exp(C3U0+C4)+C5=exp(13.2×0.8+10.91)+18.36=19.06m,

[0136] The distribution coefficient i of the residual horizontal deformation of the ground surface caused by the consolidation of underconsolidated soft soil foundation can be expressed as, but not limited to:

[0137] i=exp[-2.4L(1-U0)+2.4]+20.5=exp[-2.4×3×(1-0.8)+2.4]+20.5=23.11,

[0138] The residual horizontal deformation of the ground surface caused by the consolidation of underconsolidated soft soil foundation can be expressed as, but not limited to:

[0139]

[0140] Furthermore, if Figure 3 As shown, the embodiment of the present application Figure 3 The graph shows the residual horizontal deformation curve of the ground surface caused by the consolidation of the underconsolidated soft soil foundation. Specifically, the residual horizontal deformation ΔH of the ground surface caused by the consolidation of the underconsolidated soft soil foundation in the embodiment of the present application is c The calculation formula of is as shown above and will not be elaborated here.

[0141] In step S102, based on the shield construction and the stratum loss rate during shield construction, the short-term horizontal deformation of the ground surface caused by the shield construction in underconsolidated soft soil is calculated. The calculation formula for the short-term horizontal deformation of the ground surface caused by the shield construction in underconsolidated soft soil is:

[0142]

[0143] Among them, H s V is the short-term ground deformation caused by shield construction in underconsolidated soft soil; L is the stratum loss rate of underconsolidated soft soil shield construction; x is the horizontal distance from the tunnel center; D is the tunnel diameter; v is the stratum Poisson's ratio.

[0144] It can be understood that the short-term horizontal deformation of the ground surface caused by shield construction in underconsolidated soft soil can be understood as the horizontal deformation of the ground surface caused by shield construction during the time from the start to the end of shield tunnel construction. It can be specifically set by technical personnel in this field according to actual conditions, and this application does not make any specific restrictions.

[0145] As a possible implementation method, the embodiment of the present application can regard the under-consolidated soft soil layer as normal consolidation and determine the shield construction layer loss rate V L , calculate the short-term horizontal deformation H of the ground surface caused by shield construction in underconsolidated soft soil s .

[0146] In the embodiment of the present application, the short-term horizontal deformation H of the ground surface caused by the underconsolidated soft soil shield construction is s The calculation formula can be expressed as but not limited to:

[0147]

[0148] Among them, H s V is the short-term ground deformation caused by shield construction in underconsolidated soft soil; L is the stratum loss rate of underconsolidated soft soil shield construction; x is the horizontal distance from the tunnel center; z is the burial depth from the tunnel center to the ground surface; D is the tunnel diameter; v is the stratum Poisson's ratio.

[0149] For example, in the embodiments of the present application, Figure 2 The following is a typical tunnel section showing the calculation of the short-term horizontal deformation H of the ground caused by shield construction in underconsolidated soft soil. sWhen the Poisson's ratio of the stratum v can be taken as 0.45, the stratum loss rate V during shield construction can be taken as L 2%. At this time, the short-term horizontal deformation H of the ground caused by the underconsolidated soft soil shield construction in the embodiment of the present application s It can be expressed as, but not limited to:

[0150]

[0151] In addition, it should be noted that the shield construction stratum loss rate V in the embodiment of the present application is L When there are measured values, the actual values ​​can be used; when there are no measured values, the calculation formula can be, but is not limited to, expressed as:

[0152]

[0153] Wherein, g is the loss gap thickness parameter of undrained formation, and its calculation formula can be expressed as but not limited to:

[0154]

[0155] Among them, G p is the theoretical gap of stratum loss, i.e. the geometric distance between the outer periphery of the shield and the tunnel segment, is the over-excavation pore thickness caused by the soil in front of the excavation face entering the excavation face due to the release of the excavation face load; ω is a factor considering the influence of construction conditions and operation technology, and the value range can be 0≤ω≤0.6G p .

[0156] Furthermore, in the embodiment of the present application, the formation loss theoretical gap G p The calculation formula can be expressed as but not limited to:

[0157] G p =2Δ+δ,

[0158] Among them, Δ is the thickness of the tail of the shield shell; δ is the gap thickness required for installing the lining.

[0159] For example, the embodiment of the present application Figure 4 The display shows the ground loss during shield construction. Figure 4 It can be seen that the formation loss is the gap area between the actual excavation surface and the tunnel lining. Specifically, in the embodiment of the present application, the undrained formation loss gap thickness parameter g may include but is not limited to the geometric distance G between the outer periphery of the shield and the tunnel segment. p 2. The over-excavation pore thickness caused by the soil in front of the excavation face entering the excavation face due to the release of the excavation face load Consider the factors affecting construction conditions and operating techniques.

[0160] In step S103, based on the shield construction, the maximum value of the long-term horizontal deformation of the ground caused by the shield construction of underconsolidated soft soil and the horizontal position of the maximum value of the long-term horizontal deformation of the ground are determined, and the long-term horizontal deformation of the ground caused by the shield construction of underconsolidated soft soil is calculated by using the maximum value of the long-term horizontal deformation of the ground and the horizontal position of the maximum value of the long-term horizontal deformation of the ground. The calculation formula of the long-term horizontal deformation of the ground caused by the shield construction of underconsolidated soft soil is:

[0161]

[0162] Among them, H c is the long-term surface deformation caused by shield construction in underconsolidated soft soil; a is the horizontal position of the maximum value of long-term horizontal surface deformation caused by shield construction in underconsolidated soft soil; H cmax It is the maximum value of long-term horizontal deformation of the ground surface caused by shield construction in underconsolidated soft soil.

[0163] In some embodiments, the embodiments of the present application may regard the under-consolidated soft soil layer as normal consolidation, determine the maximum value of the long-term horizontal deformation of the ground surface caused by the under-consolidated soft soil shield construction and the horizontal position of the maximum value of the long-term horizontal deformation of the ground surface caused by the under-consolidated soft soil shield construction, and then calculate the long-term horizontal deformation of the ground surface caused by the under-consolidated soft soil shield construction. Among them, the long-term horizontal deformation of the ground surface can be understood as the horizontal deformation of the ground surface caused by the dissipation time of the excess pore water pressure caused by the shield tunnel construction, which can be specifically set by technicians in this field according to actual conditions, and this application does not make specific restrictions.

[0164] In the embodiment of the present application, the long-term horizontal deformation H of the ground surface caused by shield construction in underconsolidated soft soil is c The calculation formula can be expressed as but not limited to:

[0165]

[0166] Among them, H c is the long-term surface deformation caused by shield construction in underconsolidated soft soil; a is the horizontal position of the maximum value of long-term horizontal surface deformation caused by shield construction in underconsolidated soft soil; H cmax It is the maximum value of long-term horizontal deformation of the ground surface caused by shield construction in underconsolidated soft soil.

[0167] Further, in the embodiment of the present application, the calculation formula for the horizontal position a where the maximum value of the long-term horizontal deformation of the ground surface caused by the underconsolidated soft soil shield construction is located can be expressed as, but not limited to:

[0168] a=k1z,

[0169] Among them, k1 is 1.41.

[0170] Furthermore, in the embodiment of the present application, the maximum value of the long-term horizontal deformation of the ground surface caused by the shield construction in underconsolidated soft soil is H cmax The calculation formula can be expressed as but not limited to:

[0171]

[0172] Among them, L c is the depth from the tunnel centerline to the bottom of the fill; w is the density of water; E' d is the soil secant modulus corresponding to axial strain of 0.15% in the drained triaxial test; NH cmax is the dimensionless parameter of consolidation horizontal deformation, and its calculation formula can be but is not limited to:

[0173] NH cmax =k2 ln(k3V L +1),

[0174] Among them, k2 is 0.0032 and k3 is 255.

[0175] For example, in the present embodiment, the long-term horizontal deformation H of the ground surface caused by shield construction in underconsolidated soft soil is calculated. c When the water density is γ w 10kN / m 3 , the soil secant modulus E' corresponding to axial strain of 0.15% in the drained triaxial test d is 3.9MPa, and the dimensionless parameter of consolidation horizontal deformation NH cmax For: NH cmax =k2 ln(k3V L +1)=0.0032×ln(255×0.02+1)=0.00579.

[0176] At this time, in the embodiment of the present application, the horizontal position a where the maximum value of the long-term horizontal deformation of the ground surface caused by the underconsolidated soft soil shield construction is located can be expressed as, but not limited to:

[0177] a=k1z=1.41×18m=25.35m,

[0178] The maximum value of long-term horizontal deformation of the ground surface caused by shield construction in underconsolidated soft soil cmax It can be expressed as, but not limited to:

[0179]

[0180] Long-term horizontal deformation of the ground surface caused by shield construction in underconsolidated soft soil c It can be expressed as, but not limited to:

[0181]

[0182] In step S104, the long-term horizontal deformation of the surface of the under-consolidated soft soil shield tunnel is calculated using the residual horizontal deformation of the surface caused by the consolidation of the under-consolidated soft soil foundation, the short-term horizontal deformation of the surface caused by the under-consolidated soft soil shield construction, and the long-term horizontal deformation of the surface caused by the under-consolidated soft soil shield construction. The calculation formula of the long-term horizontal deformation of the surface of the under-consolidated soft soil shield tunnel can be, but is not limited to,:

[0183] H L (x) = H s (x)+H c (x)+ΔH c (x),

[0184] Among them, H L It is the long-term horizontal deformation of the ground surface of a shield tunnel in underconsolidated soft soil.

[0185] In some embodiments, the present application regards the long-term horizontal deformation of the ground surface of the underconsolidated soft soil shield tunnel as the short-term horizontal deformation of the ground surface caused by the underconsolidated soft soil shield construction. s , Long-term horizontal deformation of the ground surface caused by shield construction in underconsolidated soft soil c , residual horizontal deformation of the ground surface caused by consolidation of underconsolidated soft soil foundation ΔH c The sum of the three parts is used to calculate the long-term horizontal deformation of the surface of the underconsolidated soft soil shield tunnel.

[0186] In the embodiment of the present application, the long-term horizontal deformation H of the ground surface of the underconsolidated soft soil shield tunnel is L The calculation formula can be expressed as but not limited to:

[0187] H L (x) = H s (x)+H c (x)+ΔH c (x),

[0188] Among them, H L It is the long-term horizontal deformation of the ground surface of a shield tunnel in underconsolidated soft soil.

[0189] For example, the embodiment of the present application can be based on the short-term horizontal deformation H of the ground caused by the underconsolidated soft soil shield construction calculated above. s , Long-term horizontal deformation of the ground surface caused by shield construction in underconsolidated soft soil c , residual horizontal deformation of the ground surface caused by consolidation of underconsolidated soft soil foundation ΔH c Calculation of long-term horizontal deformation H of the ground surface for shield tunnels in underconsolidated soft soil L , which can be expressed as but not limited to:

[0190]

[0191] Furthermore, if Figure 5 As shown, the embodiment of the present application provides a schematic diagram of the long-term horizontal deformation curve of the ground surface and its components of an underconsolidated soft soil shield tunnel, which is composed of Figure 5 It can be seen that the long-term horizontal deformation of the ground surface of the underconsolidated soft soil shield tunnel in the embodiment of the present application is composed of three parts: the residual horizontal deformation ΔH caused by the consolidation of the underconsolidated soft soil foundation c ; Short-term horizontal deformation of the ground surface caused by shield construction in underconsolidated soft soil H s ; Long-term horizontal deformation of the ground surface caused by shield construction in underconsolidated soft soil H c .

[0192] In addition, the embodiment of the present application also provides a comparison diagram of the long-term horizontal deformation of the ground surface obtained by numerical simulation of the cross section of an underconsolidated soft soil shield tunnel and the long-term horizontal deformation of the ground surface of an underconsolidated soft soil shield tunnel obtained in the embodiment of the present application. Specifically, Figure 6 As shown in the figure, it can be seen that the long-term horizontal deformation curve obtained in the embodiment of the present application is basically consistent with the long-term horizontal deformation result of the numerical simulation.

[0193] The working principle of the method for calculating the horizontal deformation of the ground surface of an underconsolidated soft soil shield tunnel proposed in the embodiment of the present application is described in detail below in conjunction with an embodiment.

[0194] in, Figure 7 The present invention is a flow chart of the working principle of a method for calculating the horizontal deformation of the ground surface of an underconsolidated soft soil shield tunnel provided according to an embodiment of the present application.

[0195] Step S701: Calculate the residual horizontal deformation of the ground surface caused by consolidation of underconsolidated soft soil foundation.

[0196] Step S702: Calculate the short-term horizontal deformation of the ground surface caused by shield construction in underconsolidated soft soil.

[0197] Step S703: Calculate the long-term horizontal deformation of the ground surface caused by shield construction in underconsolidated soft soil.

[0198] Step S704: Calculate the long-term horizontal deformation of the ground surface of the underconsolidated soft soil shield tunnel.

[0199] That is to say, the embodiments of the present application can determine the maximum value of the residual horizontal deformation of the surface caused by the consolidation of the underconsolidated soft soil foundation, the horizontal position of the maximum value of the residual horizontal deformation of the surface caused by the consolidation of the underconsolidated soft soil foundation, and the distribution coefficient of the residual horizontal deformation of the surface caused by the consolidation of the underconsolidated soft soil foundation according to the initial consolidation degree of the underconsolidated soft soil foundation, calculate the residual horizontal deformation of the surface caused by the consolidation of the underconsolidated soft soil foundation, regard the underconsolidated soft soil layer as normal consolidation, determine the layer loss rate of the shield construction, calculate the short-term and long-term horizontal deformation of the surface caused by the underconsolidated soft soil shield construction; regard the long-term horizontal deformation of the surface of the underconsolidated soft soil shield tunnel as the sum of the three parts: the residual horizontal deformation of the surface caused by the consolidation of the underconsolidated soft soil foundation, the short-term horizontal deformation of the surface caused by the underconsolidated soft soil shield construction, and the long-term horizontal deformation of the surface caused by the underconsolidated soft soil shield construction, and finally calculate the long-term horizontal deformation of the surface of the underconsolidated soft soil shield tunnel.

[0200] Among them, the embodiment of the present application provides a schematic diagram of the calculated section of an underconsolidated soft soil shield tunnel, such as Figure 2 As shown, the embodiment of the present application selects a typical tunnel section, in which the thickness of the surface recent fill is 3m, the thickness of the underlying soft soil layer is 30m, and the initial consolidation degree of the underconsolidated soft soil foundation is 80%. The diameter of the shield tunnel constructed in the stratum is 6m, the burial depth along the central axis of the tunnel is 18m, and the burial depth from the central axis of the tunnel to the bottom of the fill is 15m.

[0201] Furthermore, the embodiment of the present application provides a curve of residual horizontal deformation of the ground surface caused by consolidation of underconsolidated soft soil foundation, such as Figure 3 As shown, specifically, the residual horizontal deformation ΔH of the ground surface caused by the consolidation of the underconsolidated soft soil foundation in the embodiment of the present application is c The calculation formula of is shown above and will not be elaborated here.

[0202] Based on Figure 2 The typical tunnel section shown in the figure shows that the present embodiment is used to calculate the short-term horizontal deformation H of the ground surface caused by shield construction in underconsolidated soft soil. s When the Poisson's ratio of the stratum is taken as ν, it can be taken as 0.45, and the stratum loss rate V during shield construction is L is 2%, which provides Figure 4 Ground loss during shield construction shown.

[0203] Furthermore, the embodiment of the present application is based on the residual horizontal deformation ΔH of the ground surface caused by the consolidation of the underconsolidated soft soil foundation. c ; Short-term horizontal deformation of the ground surface caused by shield construction in underconsolidated soft soil H s ; Long-term horizontal deformation of the ground surface caused by shield construction in underconsolidated soft soil H c Got Figure 5 Long-term horizontal deformation curve and components of the ground surface for a shield tunnel in underconsolidated soft soil are shown.

[0204] In addition, the embodiment of the present application also provides a comparison diagram of the long-term horizontal deformation of the ground surface obtained by numerical simulation of the cross section of an underconsolidated soft soil shield tunnel and the long-term horizontal deformation of the ground surface of an underconsolidated soft soil shield tunnel obtained in the embodiment of the present application. Specifically, Figure 6 As shown in the figure, it can be seen that the long-term horizontal deformation curve obtained in the embodiment of the present application is basically consistent with the long-term horizontal deformation result of the numerical simulation.

[0205] According to the calculation method of the surface horizontal deformation of the underconsolidated soft soil shield tunnel proposed in the embodiment of the present application, the long-term horizontal deformation of the surface of the underconsolidated soft soil shield tunnel can be divided into three parts: the residual horizontal deformation of the surface caused by the consolidation of the underconsolidated soft soil foundation, the short-term horizontal deformation of the surface caused by the underconsolidated soft soil shield construction, and the long-term horizontal deformation of the surface caused by the underconsolidated soft soil shield construction. The horizontal deformation of each part is gradually obtained, and the combined effect of the shield construction disturbance and the consolidation of the underconsolidated soft soil foundation is comprehensively considered. The long-term horizontal deformation of the surface after the shield construction in the underconsolidated soft soil can be predicted, thereby providing a basis for the design of the underconsolidated soft soil shield tunnel. The operation is simple, the practicability is strong, and the application value is large. Therefore, the problems that the related technology only focuses on the settlement and structural deformation of the tunnel itself, lacks deformation analysis of the strata around the tunnel, does not clarify the calculation method of the long-term horizontal deformation of the surface of the underconsolidated soft soil shield tunnel, and cannot be applied in actual engineering are solved.

[0206] Next, a device for calculating the horizontal deformation of the ground surface of an underconsolidated soft soil shield tunnel proposed in an embodiment of the present application will be described with reference to the accompanying drawings.

[0207] Figure 8 The present invention is a block diagram of a device for calculating horizontal deformation of the ground surface of an underconsolidated soft soil shield tunnel provided according to an embodiment of the present application.

[0208] like Figure 8 As shown, the device 10 for calculating the horizontal deformation of the ground surface of an underconsolidated soft soil shield tunnel includes: a first calculation module 100 , a second calculation module 200 , a third calculation module 300 and a fourth calculation module 400 .

[0209] Among them, the first calculation module 100 is used to determine the maximum value of the surface residual horizontal deformation caused by the consolidation of the underconsolidated soft soil foundation, the horizontal position of the maximum value of the surface residual horizontal deformation and the distribution coefficient of the surface residual horizontal deformation according to the consolidation of the underconsolidated soft soil foundation, and calculate the surface residual horizontal deformation caused by the consolidation of the underconsolidated soft soil foundation based on the maximum value of the surface residual horizontal deformation, the horizontal position of the maximum value of the surface residual horizontal deformation and the distribution coefficient of the surface residual horizontal deformation.

[0210] The second calculation module 200 is used to calculate the short-term horizontal deformation of the ground surface caused by shield construction in underconsolidated soft soil based on shield construction and the stratum loss rate during shield construction.

[0211] The third calculation module 300 is used to determine the maximum value of long-term surface horizontal deformation and the horizontal position of the maximum value of long-term surface horizontal deformation caused by shield construction in underconsolidated soft soil based on shield construction, and calculate the long-term surface horizontal deformation caused by shield construction in underconsolidated soft soil using the maximum value of long-term surface horizontal deformation and the horizontal position of the maximum value of long-term surface horizontal deformation.

[0212] The fourth calculation module 400 is used to calculate the long-term horizontal deformation of the surface of the underconsolidated soft soil shield tunnel using the residual horizontal deformation of the surface caused by the consolidation of the underconsolidated soft soil foundation, the short-term horizontal deformation of the surface caused by the underconsolidated soft soil shield construction, and the long-term horizontal deformation of the surface caused by the underconsolidated soft soil shield construction. Optionally, in one embodiment of the present application, the calculation formula of the residual horizontal deformation of the surface can be but is not limited to:

[0213]

[0214] Where ΔH c is the residual horizontal deformation of the ground surface caused by the consolidation of underconsolidated soft soil foundation; ΔH cmax is the maximum value of the residual horizontal deformation of the surface caused by the consolidation of the underconsolidated soft soil foundation; b is the horizontal position of the maximum value of the residual horizontal deformation of the surface caused by the consolidation of the underconsolidated soft soil foundation; i is the distribution coefficient of the residual horizontal deformation of the surface caused by the consolidation of the underconsolidated soft soil foundation.

[0215] Optionally, in one embodiment of the present application, the calculation formula for the maximum value of the residual horizontal deformation of the ground surface caused by the consolidation of the underconsolidated soft soil foundation may be, but is not limited to,:

[0216] ΔH cmax =C1ln[C2(1-U0)+1],

[0217] The calculation formula for the horizontal position of the maximum residual horizontal deformation of the ground surface caused by the consolidation of underconsolidated soft soil foundation can be, but is not limited to,:

[0218] b=exp(C3U0+C4)+C5,

[0219] The calculation formula for the distribution coefficient of residual horizontal deformation of the surface caused by consolidation of underconsolidated soft soil foundation can be but is not limited to:

[0220] i=exp[-2.4L(1-U0)+2.4]+20.5,

[0221] Among them, C1, C2, C3, C4, C5 are the fitting coefficients in each expression, U0 is the initial consolidation degree of underconsolidated soft soil foundation; L is the thickness of the recent fill on the surface; Among them,

[0222] The calculation formula of C1 can be but is not limited to:

[0223] C1=-3.5L-0.55z+42.57,

[0224] The calculation formula of C2 can be but is not limited to:

[0225] C2=7.3L-0.2z-11.2,

[0226] The calculation formula of C3 can be but is not limited to:

[0227] C3=0.25(z-16.0) 2 +12.2,

[0228] The calculation formula of C4 can be but is not limited to:

[0229] C2=7.3L-0.2z-11.2,

[0230] The calculation formula of C5 can be but is not limited to:

[0231] C5=0.52z+9.0,

[0232] Where z is the depth from the center of the tunnel to the ground surface.

[0233] Optionally, in one embodiment of the present application, the calculation formula for the short-term horizontal deformation of the ground surface caused by shield construction in underconsolidated soft soil may be, but is not limited to,:

[0234]

[0235] Among them, H s V is the short-term ground deformation caused by shield construction in underconsolidated soft soil; L is the stratum loss rate of underconsolidated soft soil shield construction; x is the horizontal distance from the tunnel center; D is the tunnel diameter; v is the stratum Poisson's ratio.

[0236] Optionally, in one embodiment of the present application, the calculation formula for the long-term horizontal deformation of the ground surface caused by shield construction in underconsolidated soft soil may be, but is not limited to,:

[0237]

[0238] Among them, H c is the long-term surface deformation caused by shield construction in underconsolidated soft soil; a is the horizontal position of the maximum value of long-term horizontal surface deformation caused by shield construction in underconsolidated soft soil; H cmaxIt is the maximum value of long-term horizontal deformation of the ground surface caused by shield construction in underconsolidated soft soil.

[0239] Optionally, in one embodiment of the present application, the calculation formula for the long-term horizontal deformation of the ground surface of an underconsolidated soft soil shield tunnel may be, but is not limited to,:

[0240] H L (x) = H s (x)+H c (x)+ΔH c (x),

[0241] Among them, H L It is the long-term horizontal deformation of the ground surface of a shield tunnel in underconsolidated soft soil.

[0242] It should be noted that the above explanation of the embodiment of the method for calculating the horizontal deformation of the ground surface of an underconsolidated soft soil shield tunnel is also applicable to the device for calculating the horizontal deformation of the ground surface of an underconsolidated soft soil shield tunnel in this embodiment, and will not be repeated here.

[0243] According to the device for calculating the horizontal deformation of the ground surface of an underconsolidated soft soil shield tunnel proposed in the embodiment of the present application, the long-term horizontal deformation of the ground surface of an underconsolidated soft soil shield tunnel can be divided into three parts: the residual horizontal deformation of the ground surface caused by the consolidation of the underconsolidated soft soil foundation, the short-term horizontal deformation of the ground surface caused by the construction of the underconsolidated soft soil shield, and the long-term horizontal deformation of the ground surface caused by the construction of the underconsolidated soft soil shield. The horizontal deformation of each part is gradually obtained, and the combined effects of the disturbance caused by the shield construction and the consolidation of the underconsolidated soft soil foundation are comprehensively considered. The long-term horizontal deformation of the ground surface after the shield construction in the underconsolidated soft soil can be predicted, thereby providing a basis for the design of the underconsolidated soft soil shield tunnel. The device is simple to operate, highly practical, and has great application value. Thus, the problems in the related art that only the settlement and structural deformation of the tunnel itself are analyzed, the deformation of the strata around the tunnel is lacking, and there is no clear calculation method for the long-term horizontal deformation of the ground surface of the underconsolidated soft soil shield tunnel is not applicable in actual engineering are solved.

[0244] Fig. 9 This is a schematic diagram of the structure of an electronic device provided according to an embodiment of the present application. The electronic device may include:

[0245] A memory 901 , a processor 902 , and a computer program stored in the memory 901 and executable on the processor 902 .

[0246] When the processor 902 executes the program, the method for calculating the horizontal deformation of the ground surface of an underconsolidated soft soil shield tunnel provided in the above embodiment is implemented.

[0247] Furthermore, the electronic device further comprises:

[0248] The communication interface 903 is used for communication between the memory 901 and the processor 902 .

[0249] The memory 901 is used to store computer programs that can be executed on the processor 902 .

[0250] The memory 901 may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.

[0251] If the memory 901, the processor 902 and the communication interface 903 are implemented independently, the communication interface 903, the memory 901 and the processor 902 can be connected to each other through a bus and communicate with each other. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Fig. 9 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0252] Optionally, in a specific implementation, if the memory 901, the processor 902 and the communication interface 903 are integrated on a chip, the memory 901, the processor 902 and the communication interface 903 can communicate with each other through an internal interface.

[0253] The processor 902 may be a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application.

[0254] An embodiment of the present application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the above-mentioned method for calculating the horizontal deformation of the ground surface of an underconsolidated soft soil shield tunnel.

[0255] The embodiment of the present application also provides a computer program product, including a computer program, which, when executed, implements the above method for calculating the horizontal deformation of the ground surface of an underconsolidated soft soil shield tunnel.

[0256] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0257] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0258] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or N executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0259] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purpose of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or N wirings (electronic devices), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways as necessary and then storing it in a computer memory.

[0260] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above embodiment, the N steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. If implemented by hardware, as in another embodiment, it can be implemented by any one or a combination of multiple of the following technologies known in the art: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0261] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0262] In addition, each functional unit in each embodiment of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0263] The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application. A person of ordinary skill in the art may change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A method for calculating the horizontal deformation of the ground surface of an underconsolidated soft soil shield tunnel, characterized in that: The following steps are involved: Determining the maximum value of the surface residual horizontal deformation, the horizontal position of the maximum value of the surface residual horizontal deformation and the distribution coefficient of the surface residual horizontal deformation caused by the consolidation of the underconsolidated soft soil foundation according to the consolidation of the underconsolidated soft soil foundation, and calculating the surface residual horizontal deformation caused by the consolidation of the underconsolidated soft soil foundation based on the maximum value of the surface residual horizontal deformation, the horizontal position of the maximum value of the surface residual horizontal deformation and the distribution coefficient of the surface residual horizontal deformation; Based on shield construction and the ground loss rate during shield construction, the short-term horizontal deformation of the ground caused by shield construction in underconsolidated soft soil is calculated. Based on the shield construction, determining the maximum value of the long-term horizontal deformation of the ground surface caused by the underconsolidated soft soil shield construction and the horizontal position of the maximum value of the long-term horizontal deformation of the ground surface, and calculating the long-term horizontal deformation of the ground surface caused by the underconsolidated soft soil shield construction using the maximum value of the long-term horizontal deformation of the ground surface and the horizontal position of the maximum value of the long-term horizontal deformation of the ground surface; The long-term horizontal deformation of the surface of the underconsolidated soft soil shield tunnel is calculated by using the residual horizontal deformation of the surface caused by the consolidation of the underconsolidated soft soil foundation, the short-term horizontal deformation of the surface caused by the underconsolidated soft soil shield construction, and the long-term horizontal deformation of the surface caused by the underconsolidated soft soil shield construction.

2. The method according to claim 1, characterized in that: The calculation formula for the residual horizontal deformation of the surface caused by the consolidation of the underconsolidated soft soil foundation is: Where ΔH c is the residual horizontal deformation of the ground surface caused by the consolidation of underconsolidated soft soil foundation; ΔH cmax is the maximum value of the residual horizontal deformation of the surface caused by the consolidation of the underconsolidated soft soil foundation; b is the horizontal position of the maximum value of the residual horizontal deformation of the surface caused by the consolidation of the underconsolidated soft soil foundation; i is the distribution coefficient of the residual horizontal deformation of the surface caused by the consolidation of the underconsolidated soft soil foundation.

3. The method according to claim 1, characterized in that in, The calculation formula for the maximum residual horizontal deformation of the surface caused by the consolidation of the underconsolidated soft soil foundation is: ΔH cmax =C1ln[C2(1-U0)+1], The calculation formula for the horizontal position of the maximum value of the residual horizontal deformation of the surface caused by the consolidation of the underconsolidated soft soil foundation is: b=exp(C3U0+C4)+C5, The calculation formula for the distribution coefficient of the residual horizontal deformation of the surface caused by the consolidation of the underconsolidated soft soil foundation is: i=exp[-2.4L(1-U0)+2.4]+20.5, Among them, C1, C2, C3, C4, C5 are the fitting coefficients in each expression, U0 is the initial consolidation degree of underconsolidated soft soil foundation; L is the thickness of the recent fill on the surface; Among them, The calculation formula of C1 is: C1=-3.5L-0.55z+42.57, The calculation formula of C2 is: C2=7.3L-0.2z-11.2, The calculation formula of C3 is: C3=0.25(z-16.0) 2 +12.2, The calculation formula of C4 is: C2=7.3L-0.2z-11.2, The calculation formula of C5 is: C5=0.52z+9.0, Where z is the depth from the center of the tunnel to the ground surface.

4. The method according to claim 1, characterized in that: The calculation formula for the short-term horizontal deformation of the ground surface caused by the underconsolidated soft soil shield construction is: Among them, H s V is the short-term ground deformation caused by shield construction in underconsolidated soft soil; L is the stratum loss rate of underconsolidated soft soil shield construction; x is the horizontal distance from the tunnel center; D is the tunnel diameter; v is the stratum Poisson's ratio.

5. The method according to claim 1, characterized in that: The calculation formula for the long-term horizontal deformation of the ground surface caused by the underconsolidated soft soil shield construction is: Among them, H c is the long-term surface deformation caused by shield construction in underconsolidated soft soil; a is the horizontal position of the maximum value of long-term horizontal surface deformation caused by shield construction in underconsolidated soft soil; H cmax It is the maximum value of long-term horizontal deformation of the ground surface caused by shield construction in underconsolidated soft soil.

6. The method according to claim 1, characterized in that The calculation formula for the long-term horizontal deformation of the ground surface of the underconsolidated soft soil shield tunnel is: H L (x)=H s (x)+H c (x)+ΔH c (x), Among them, H L It is the long-term horizontal deformation of the ground surface of a shield tunnel in underconsolidated soft soil.

7. A device for calculating horizontal deformation of the ground surface of an underconsolidated soft soil shield tunnel, characterized in that: include: A first calculation module is used to determine the maximum value of the surface residual horizontal deformation caused by the consolidation of the underconsolidated soft soil foundation, the horizontal position of the maximum value of the surface residual horizontal deformation and the distribution coefficient of the surface residual horizontal deformation according to the consolidation of the underconsolidated soft soil foundation, and calculate the surface residual horizontal deformation caused by the consolidation of the underconsolidated soft soil foundation based on the maximum value of the surface residual horizontal deformation, the horizontal position of the maximum value of the surface residual horizontal deformation and the distribution coefficient of the surface residual horizontal deformation; The second calculation module is used to calculate the short-term horizontal deformation of the ground surface caused by shield construction in underconsolidated soft soil based on shield construction and the stratum loss rate during shield construction; A third calculation module is used to determine the maximum value of the long-term horizontal deformation of the surface caused by the underconsolidated soft soil shield construction and the horizontal position of the maximum value of the long-term horizontal deformation of the surface, based on the shield construction, and calculate the long-term horizontal deformation of the surface caused by the underconsolidated soft soil shield construction by using the maximum value of the long-term horizontal deformation of the surface and the horizontal position of the maximum value of the long-term horizontal deformation of the surface; The fourth calculation module is used to calculate the long-term horizontal deformation of the surface of the underconsolidated soft soil shield tunnel by using the residual horizontal deformation of the surface caused by the consolidation of the underconsolidated soft soil foundation, the short-term horizontal deformation of the surface caused by the underconsolidated soft soil shield construction, and the long-term horizontal deformation of the surface caused by the underconsolidated soft soil shield construction.

8. An electronic device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the method for calculating the horizontal deformation of the ground surface of an underconsolidated soft soil shield tunnel as described in any one of claims 1 to 5.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: The program is executed by a processor to implement the method for calculating the horizontal deformation of the ground surface of an underconsolidated soft soil shield tunnel as described in any one of claims 1 to 5.

10. A computer program product, characterized in that The invention comprises a computer program, which, when executed, is used to implement the method for calculating the horizontal deformation of the ground surface of an underconsolidated soft soil shield tunnel as claimed in any one of claims 1 to 5.

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