CN111259560B - Method and system for classifying subsidence morphology of earth surface in shield construction - Google Patents
Method and system for classifying subsidence morphology of earth surface in shield construction Download PDFInfo
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Abstract
Discloses a method and a system for classifying subsidence morphology of earth surface in shield construction. The method may include: setting earth surface subsidence observation point groups aiming at a construction area, and measuring left and right line earth surface subsidence data of each observation point group; according to the earth surface subsidence data, drawing space curves of left and right lines of each observation point group, and further obtaining a space evolution rule of earth surface subsidence of a construction area; classifying the settling tanks according to a space evolution rule; classifying the space curves according to the classification of the settling tanks to respectively obtain time evolution rules of different categories, and further obtaining the time-space evolution rules of the subsidence of the earth surface of the shield construction. According to the method, the earth surface subsidence morphology classification of the shield construction is realized by analyzing earth surface subsidence space-time evolution rules of single lines of all the measuring point groups.
Description
Technical Field
The invention relates to the field of shield construction, in particular to a method and a system for classifying subsidence morphology of the earth surface of shield construction.
Background
As early as 1969, peck studied the surface subsidence caused by tunnel excavation, and considered that the instantaneous surface subsidence caused by tunnel excavation occurs without draining, the volume of the subsidence tank should be equal to the volume of stratum loss, and can be described by Gaussian distribution. In 1987, SAGASETA deduces a theoretical solution of a strain field when near-surface soil is lost under the condition that the soil is incompressible and isotropic, and the result is well fitted under different working conditions such as foundation tunneling and piling, and can be applied to practical engineering. In 2 months 1993, the national scholars Liu Jianhang carried out detailed analysis on the numerical simulation, the empirical formula and the semi-theoretical analysis method, consider that theoretical and actual monitoring data are combined and assisted by empirical judgment when predicting the influence of deep foundation pit excavation on soil layers. In 1996, the golden-year and the chikungunya were three-dimensional numerical simulation on full-section tunnel excavation, and the model adopts a nonlinear viscoelastic model, and the result shows that the excavation surface with the diameter of 2 times of tunnel can be influenced. In month 1 of 2001, gonza' lez and Sagaseta derive theoretical analysis formulas of earth surface subsidence caused by shield crossing based on subway working conditions established in 1995 to 1999 of Madeli, analyze the value condition of each parameter under different soil types and tunnel shapes, and the formulas are well fitted with actual monitoring data. In 2005, finno, voss jr et al put forward a predictive model solution suitable for a building based on a predictive formula of the influence of existing foundation pit excavation on the earth's surface with urban environment as a background, and the method is between simple and complex empirical methods, and is more practical. In 2007, suwansawat, einstein considers that a settling tank of a double-hole tunnel caused by shield construction is influenced by factors such as ground conditions, tunnel size and the like, and also by parameters and operation of a shield machine; two scholars use a Mangu subway as an engineering background, and a superposition method is provided for predicting the double-hole tunnel settling tank based on a Gaussian function. In 10 months in 2008, the horse can be tied to the subway of the Wuhan as a background, the Peck formula is improved through actual measurement data and theoretical analysis, and meanwhile, a super-geometric method is provided for the ground surface subsidence caused by double-line tunnel excavation, so that the asymmetric state of the sedimentation tank is explained. Based on a unified soil body movement model of a shield tunnel and a study on a Loganathan formula, wei Gang proposes a two-dimensional solution of soil body deformation caused by shield construction through correction of a Verriujt formula, and the method is well applied in a construction stage through example verification. Based on theoretical analysis in the same year as 4 months, han, standing et al, a method for predicting a settlement curve of a building on the basis of considering structural rigidity of the building is established by adopting a method for combining mechanism study with measured data, and is verified in an engineering example. In month 3 2011, ding Lieyun, liming and the like, a method of combining numerical simulation with actual monitoring data is adopted, the influence of shield initiation construction on earth surface subsidence is researched, and a common rule is obtained by comparing the two methods, so that references are provided for the prediction of the same type of engineering. In 6 months in 2013, gang Wei, siyuan Pang et al deduce an analytical solution of deformation caused by shield tunneling under a double-line parallel tunnel on the basis of a shield tunneling single-hole tunnel analytical model, and find that the formula is accurate in prediction after fitting with actual monitoring data, high in precision and wide in applicability. The surface subsidence prediction formula for double-line tunnel construction is simplified on the basis of researches of other scholars in the year of 10 of 2016, wei Gang and Zhou Yangkan. In 2 months 2017, wei Gang and Wang Xiao, a correction formula of a shield method ground total settlement two-dimensional solution suitable for a double-track tunnel short-distance working condition is established through the research of short-distance definition coefficients, and different settlement curve forms under different definition coefficients are obtained. In 7 months 2018, li Jian, chen Jian et al put forward the calculation parameter value suitable for shield excavation in the Xiamen area by researching the influence of the elastic modulus, horizontal fluctuation distance and variation coefficient of the soil body on the double-line tunnel excavation based on the Monte Carlo strategy and finite difference simulation by taking the construction of a shield tunnel in the Xiamen area as the background.
Although students at home and abroad conduct detailed study on analysis solutions of earth surface subsidence under shield construction conditions, the students can find that the students are still influenced by geological conditions, existing surrounding complex environments such as underground structures and the like, and unified solutions applicable to all conditions are not obtained. Therefore, it is necessary to develop a method and a system for classifying subsidence morphology of the earth surface of shield construction, which are suitable for complex surrounding environments.
The information disclosed in the background section of the invention is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
The invention provides a method and a system for classifying earth surface subsidence morphology in shield construction, which can realize earth surface subsidence morphology classification in shield construction by analyzing earth surface subsidence space-time evolution rules of single lines of all measuring point groups.
According to one aspect of the invention, a classification method for subsidence morphology of the earth surface of shield construction is provided. The method may include: setting earth surface subsidence observation point groups aiming at a construction area, and measuring left and right line earth surface subsidence data of each observation point group; drawing space curves of left and right lines of each observation point group according to the earth surface subsidence data, and further obtaining a space evolution rule of earth surface subsidence of the construction area; classifying the settling tanks according to the space evolution rule; and classifying the space curves according to the classification of the settling tanks to respectively obtain time evolution rules of different categories, thereby obtaining the time evolution rules of the subsidence of the earth surface of the shield construction.
Preferably, the construction area is an area having a complex surrounding environment.
Preferably, the spatial evolution rule is obtained according to numerical simulation and actual detection data.
Preferably, the spatial evolution rule is obtained by sequentially analyzing a theoretical solution without complex peripheral sedimentation of the space curve, a numerical model without complex peripheral environment, a numerical model under complex peripheral environment and actual working condition measured data.
Preferably, the settling tank comprises a typical settling tank, a part of a regular settling tank, an irregular settling tank and a data missing settling tank.
According to another aspect of the present invention, there is provided a classification system for subsidence morphology of earth's surface in shield construction, which is characterized in that the system comprises: a memory storing computer executable instructions; a processor executing computer executable instructions in the memory, the processor performing the steps of: setting earth surface subsidence observation point groups aiming at a construction area, and measuring left and right line earth surface subsidence data of each observation point group; drawing space curves of left and right lines of each observation point group according to the earth surface subsidence data, and further obtaining a space evolution rule of earth surface subsidence of the construction area; classifying the settling tanks according to the space evolution rule; and classifying the space curves according to the classification of the settling tanks to respectively obtain time evolution rules of different categories, thereby obtaining the time evolution rules of the subsidence of the earth surface of the shield construction.
Preferably, the construction area is an area having a complex surrounding environment.
Preferably, the spatial evolution rule is obtained according to numerical simulation and actual detection data.
Preferably, the spatial evolution rule is obtained by sequentially analyzing a theoretical solution without complex peripheral sedimentation of the space curve, a numerical model without complex peripheral environment, a numerical model under complex peripheral environment and actual working condition measured data.
Preferably, the settling tank comprises a typical settling tank, a part of a regular settling tank, an irregular settling tank and a data missing settling tank.
The method and apparatus of the present invention have other features and advantages which will be apparent from or are set forth in detail in the accompanying drawings and the following detailed description, which are incorporated herein, and which together serve to explain certain principles of the present invention.
Drawings
The foregoing and other objects, features and advantages of the invention will be apparent from the following more particular descriptions of exemplary embodiments of the invention as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the invention.
FIG. 1 shows a flow chart of the steps of a method for classifying subsidence morphology of a shield construction earth according to one embodiment of the present invention.
Fig. 2 shows a graphical representation of typical set of observation of settling tanks DX-879 day settling versus the change in profile of the face before and after passing through the observation set, in accordance with one embodiment of the present invention.
FIG. 3 illustrates a graphical representation of the cumulative settlement of a typical set of observation sets of settling tanks DX-879 versus the change in curves of the face before and after passing through the observation sets, in accordance with one embodiment of the present invention.
Fig. 4 shows a schematic diagram of the change in profile of a part of a regular settling tank observation set DX-859 day settlement with the passage of the face through the observation set, according to one embodiment of the invention.
Fig. 5 shows a schematic diagram of the cumulative settlement of a part of a regular settling tank observation set DX-859 and the curve change before and after the working surface passes through the observation set according to one embodiment of the invention.
Fig. 6 shows a schematic diagram of the change in curves of irregular settling tank observation set DX-839 day settlement and face before and after passing through the observation set, according to one embodiment of the invention.
Fig. 7 shows a graph of cumulative settlement of an irregular set of observation of settling tanks DX-839 versus curve change before and after passage of the face through the observation set, in accordance with one embodiment of the invention.
FIG. 8 illustrates a graph of day DX-899 settlement versus change in profile of the face before and after passage through the observation set for a data loss profile trough observation set according to one embodiment of the invention.
FIG. 9 illustrates a graph of cumulative settlement of a data loss profile trough observation set DX-919 versus curve change before and after a face passes through the observation set, according to one embodiment of the invention.
Detailed Description
The invention will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present invention are illustrated in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
In this embodiment, the method for classifying the subsidence morphology of the earth surface of the shield construction according to the present invention may include: step 101, setting earth surface subsidence observation point groups aiming at a construction area, and measuring left and right line earth surface subsidence data of each observation point group; 102, drawing space curves of left and right lines of each observation point group according to earth surface subsidence data, and further obtaining a space evolution rule of earth surface subsidence of a construction area; step 103, classifying the settling tanks according to a space evolution rule; and step 104, classifying the space curves according to the classification of the settling tanks, and respectively obtaining time evolution rules of different categories so as to obtain the time evolution rules of the subsidence of the earth surface of the shield construction.
In one example, the construction area is an area having a complex ambient environment.
In one example, the spatial evolution law is obtained from numerical simulation and actual detection data.
In one example, the spatial evolution rule is obtained by sequentially analyzing a theoretical solution without complex peripheral sedimentation of a space curve, a numerical model without complex peripheral environment, a numerical model under complex peripheral environment and actual working condition measured data.
In one example, the settling tank includes a typical settling tank, a partially regular settling tank, an irregular settling tank, and a data missing settling tank.
FIG. 1 shows a flow chart of the steps of a method for classifying subsidence morphology of a shield construction earth according to one embodiment of the present invention.
Specifically, the classification method of the subsidence morphology of the shield construction ground surface can comprise the following steps:
setting earth surface subsidence observation point groups aiming at construction areas, and measuring left and right line earth surface subsidence data of each observation point group, wherein the construction areas are areas with complex surrounding environments such as large-scale underground passages, high-medium pressure gas pipelines and the like; drawing space curves of left and right lines of each observation point group according to earth surface subsidence data, and obtaining a space evolution rule of earth surface subsidence of a construction area according to numerical simulation and actual detection data, wherein the space evolution rule comprises the following specific steps: according to the numerical simulation and the actual detection data, the obtaining of the spatial evolution rule comprises the following steps: sequentially analyzing the theoretical solution without complex peripheral settlement of the space curve, the numerical model without complex peripheral environment, the numerical model under the complex peripheral environment and actual working condition measured data to obtain the difference of the earth surface settlement under different conditions, namely the space evolution rule; the theoretical Peck curve of the earth surface subsidence caused by tunnel excavation is solved by a theoretical solution of the space curve without complex peripheral subsidence, and the numerical model without complex peripheral environment is obtained by performing numerical simulation on the tunnel under a simple working condition; the numerical model under the complex surrounding environment is obtained by performing numerical simulation on the tunnel under the complex working condition.
Classifying the subsiders according to space evolution rules, namely the difference of earth surface subsidence under different conditions, wherein the subsider with the largest subsidence value is not positioned at the center of a tunnel line, but is a typical subsider; the settling tank with the maximum settling value far away from the center of the tunnel is a part of regular settling tank; the settling tank with smaller settling value in the middle of the tunnel and larger settling value at the two ends is an irregular settling tank; the sedimentation tank with unobvious regularity of sedimentation value due to data missing is a data missing sedimentation tank; classifying the space curves according to the classification of the settling tanks, and respectively obtaining different types of time evolution rules according to the earth surface settlement change when the face passes through the early stage, the middle stage and the later stage of the measuring points, namely the earth surface settlement change rule of each type of settling tanks in the early stage, the middle stage and the later stage of the face passing through the measuring points, wherein the time evolution rules comprise the time evolution rules of typical settling tanks, the time evolution rules of partial rule settling tanks, the time evolution rules of irregular settling tanks and the time evolution rules of data missing settling tanks. The time evolution rule of a typical settling tank is to compare a regular group of single-line space curves, and analyze the time evolution rule of the single-line space curves of a measuring point group with obvious rules in different time periods; the time evolution rule of the partial rule settling tank is that the time evolution rule analysis is carried out on a measuring point group which has a complex settling tank forming process and a less obvious space curve rule; the time evolution rule of the irregular settling tank is that the time sequence value of an irregular measuring point group of the settling tank is selected for drawing and analysis, and the possible rule of the irregular settling tank is researched; the time evolution rule of the data missing section settling tank is that the time sequence value of the measurement point group with relatively deficient data is drawn and analyzed, and the possible rule of the time sequence value is researched.
And combining the space evolution law and the time evolution law of each type of subsidence groove to obtain the space-time evolution law of the subsidence of the earth surface of the shield construction, and realizing the classification of the subsidence form of the earth surface of the shield construction.
According to the method, classification of earth surface subsidence morphology of shield construction is realized by analyzing earth surface subsidence space-time evolution rules of single lines of all measuring point groups.
Application example
In order to facilitate understanding of the solution and the effects of the embodiments of the present invention, a specific application example is given below. It will be understood by those of ordinary skill in the art that the examples are for ease of understanding only and that any particular details thereof are not intended to limit the present invention in any way.
Fig. 2 shows a graphical representation of typical set of observation of settling tanks DX-879 day settling versus the change in profile of the face before and after passing through the observation set, in accordance with one embodiment of the present invention.
The date corresponding to the monitoring number 1 in the measuring point group DX-879 in FIG. 2 is 6 months 18 days, and the date corresponding to the 27 is 7 months 14 days. The daily sedimentation value of the measuring point group shows a rule along with the passage of the tunnel face: the sedimentation value change range is smaller before the tunnel face passes through; when the tunnel face passes, the earth surface has weak rebound; after passing, the fluctuation range of the sedimentation value becomes large, and the sedimentation is larger than the bulge as a whole; finally, along with the distance of the face, the fluctuation of the settlement amount becomes smaller and gradually approaches zero. However, the change of the daily sedimentation curve has a certain relation with the passage of the tunnel face, but the rule is not obvious, so the analysis of the accumulated sedimentation value of the measuring point group is continued.
FIG. 3 illustrates a graphical representation of the cumulative settlement of a typical set of observation sets of settling tanks DX-879 versus the change in curves of the face before and after passing through the observation sets, in accordance with one embodiment of the present invention.
FIG. 3 shows the cumulative settlement curve of the measuring point group divided into 4 stages according to the passing of the face, and the rule of the cumulative settlement value of the measuring point group DX-879 along with the passing of the face is as follows: before the tunnel face passes, weak sedimentation appears on the curve; when the tunnel face passes through, obvious rebound occurs on the earth surface; after passing, the slope of the sedimentation curve is rapidly increased, the sedimentation value is greatly increased, then the sedimentation amplification is slowed down, and the fluctuation range is reduced; and finally, gradually stabilizing the sedimentation value along with the distance of the tunnel face.
Fig. 4 shows a schematic diagram of the change in profile of a part of a regular settling tank observation set DX-859 day settlement with the passage of the face through the observation set, according to one embodiment of the invention.
In the figure, the date corresponding to the monitoring number 1 is 7 months and 27 days, and the date corresponding to the monitoring number 18 is 8 months and 12 days. From the figure, it can be found that a certain relationship exists between the daily settlement curve of the measuring point group and the passage of the tunnel face: the fluctuation range of the earth surface sedimentation value is larger at the initial stage of earth surface sedimentation and before and after the passage of the tunnel face, and the fluctuation range is gradually reduced along with the distance of the tunnel face. But the whole sedimentation process has obvious fluctuation, and the fluctuation amplitude is always smaller.
Fig. 5 shows a schematic diagram of the cumulative settlement of a part of a regular settling tank observation set DX-859 and the curve change before and after the working surface passes through the observation set according to one embodiment of the invention.
The cumulative sedimentation curve of the measuring point group has the following rules: before the tunnel face passes, larger subsidence occurs on the earth surface; when the face passes, the earth surface has more remarkable rebound. In rebound when the tunnel face passes through, the measuring point group DX-859 has a bulge of the measuring point 9; after the tunnel face passes, the settlement value of the measuring point group is always in a fluctuation state, the fluctuation range is not large, the whole is between-2 mm and-1 mm, and the fluctuation range is gradually reduced.
Fig. 6 shows a schematic diagram of the change in curves of irregular settling tank observation set DX-839 day settlement and face before and after passing through the observation set, according to one embodiment of the invention.
Fig. 6 shows that the date corresponding to the monitoring number 1 in the settlement time sequence graph of the measuring point group DX-839 days is 6 months 11 days, and the date corresponding to the number 32 is 7 months 12 days. The daily settlement curve fluctuation range of the measuring point group is smaller, and the whole settlement process is irrelevant to the passage of the tunnel face and is always in a disordered fluctuation state, so that the accumulated settlement curve is continuously analyzed.
Fig. 7 shows a graph of cumulative settlement of an irregular set of observation of settling tanks DX-839 versus curve change before and after passage of the face through the observation set, in accordance with one embodiment of the invention.
Based on the observation of the cumulative sedimentation curve of the measuring point group in fig. 7, the more obvious sedimentation is found before the tunnel face passes through; the tunnel face stably fluctuates in an initial stage, then the trend rises, and the rebound ground surface is raised; meanwhile, after the tunnel face passes through, the earth surface sedimentation value is rebounded, and the sedimentation value is always in a fluctuation state, but the fluctuation range of the measuring point is concentrated.
FIG. 8 illustrates a graph of day DX-899 settlement versus change in profile of the face before and after passage through the observation set for a data loss profile trough observation set according to one embodiment of the invention.
The set of points DX-919 shown in FIG. 8 has only points 1 to 4 with data, and the number of times 1 of monitoring corresponds to 6 months and 23 days, and 28 corresponds to 7 months and 20 days. By the graph, neglecting the measuring points with incomplete data, the fluctuation of the surface of the curve is larger in the early-stage to the middle-stage of settlement, and at the moment, certain rules exist in the fluctuation, namely 'uplift- & gt settlement- & gt uplift- & gt settlement', the fluctuation gradually decreases, the whole curve is the uplift trend, and the rest time is unchanged except that the measuring points 3 and 4 with incomplete data are changed for 1 to 2 times in the middle-stage of settlement. Therefore, the daily settlement evolution law of the measuring point group has no great relation with the passage of the tunnel face, so the accumulated settlement evolution law of the measuring point group is continuously analyzed.
FIG. 9 illustrates a graph of cumulative settlement of a data loss profile trough observation set DX-919 versus curve change before and after a face passes through the observation set, according to one embodiment of the invention.
As can be seen from fig. 9, points 3, 4 of DX-919 sink in the mid-settling period, and the rest of the time period is unchanged except for point 3 which then rebounds. The measuring point group continuously bulges from the initial monitoring until the rising to about 7mm, but the sinking speed is slower, and the rising state is still kept after the measuring point group is finally stable.
In conclusion, the earth surface subsidence morphology classification of the shield construction is realized by analyzing earth surface subsidence space-time evolution rules of all the single line of the measuring point group.
It will be appreciated by persons skilled in the art that the above description of embodiments of the invention has been given for the purpose of illustrating the benefits of embodiments of the invention only and is not intended to limit embodiments of the invention to any examples given.
According to an embodiment of the present invention, there is provided a shield construction earth surface subsidence morphology classification system, which is characterized in that the system includes: a memory storing computer executable instructions; a processor executing computer executable instructions in the memory, the processor performing the steps of: setting earth surface subsidence observation point groups aiming at a construction area, and measuring left and right line earth surface subsidence data of each observation point group; according to the earth surface subsidence data, drawing space curves of left and right lines of each observation point group, and further obtaining a space evolution rule of earth surface subsidence of a construction area; classifying the settling tanks according to a space evolution rule; classifying the space curves according to the classification of the settling tanks to respectively obtain time evolution rules of different categories, and further obtaining the time-space evolution rules of the subsidence of the earth surface of the shield construction.
In one example, the construction area is an area having a complex ambient environment.
In one example, the spatial evolution law is obtained from numerical simulation and actual detection data.
In one example, the spatial evolution rule is obtained by sequentially analyzing a theoretical solution without complex peripheral sedimentation of a space curve, a numerical model without complex peripheral environment, a numerical model under complex peripheral environment and actual working condition measured data.
In one example, the settling tank includes a typical settling tank, a partially regular settling tank, an irregular settling tank, and a data missing settling tank.
The system realizes classification of earth surface subsidence morphology of shield construction by analyzing earth surface subsidence space-time evolution rules of single lines of all measuring point groups.
It will be appreciated by persons skilled in the art that the above description of embodiments of the invention has been given for the purpose of illustrating the benefits of embodiments of the invention only and is not intended to limit embodiments of the invention to any examples given.
The foregoing description of embodiments of the invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described.
Claims (4)
1. The method for classifying the subsidence morphology of the earth surface of the shield construction is characterized by comprising the following steps:
setting earth surface subsidence observation point groups aiming at a construction area, and measuring left and right line earth surface subsidence data of each observation point group;
drawing space curves of left and right lines of each observation point group according to the earth surface subsidence data, and further obtaining a space evolution rule of earth surface subsidence of the construction area; sequentially analyzing the theoretical solution without complex peripheral settlement of the space curve, the numerical model without complex peripheral environment, the numerical model under the complex peripheral environment and actual working condition measured data to obtain the difference of the earth surface settlement under different conditions, namely the space evolution rule;
classifying the subsiders according to space evolution rules, namely the difference of earth surface subsidence under different conditions, wherein the smaller subsider at the center of the offset tunnel line with the largest subsidence value is a typical subsider; the settling tank with the maximum settling value far away from the center of the tunnel is a part of regular settling tank; the settling tank with smaller settling value in the middle of the tunnel and larger settling value at the two ends is an irregular settling tank; the sedimentation tank with unobvious regularity of sedimentation value due to data missing is a data missing sedimentation tank;
classifying the space curves according to the classification of the settling tanks, respectively obtaining time evolution rules of different categories according to the earth surface subsidence change of the face passing through the early, middle and later stages of the measuring points, combining the space evolution rules and the time evolution rules of each category of settling tanks to obtain the time and space evolution rules of earth surface subsidence of shield construction, and realizing earth surface subsidence form classification of shield construction.
2. The classification method of subsidence morphology of a shield construction surface according to claim 1, wherein the construction area is an area having a complex surrounding environment.
3. The utility model provides a shield constructs construction earth's surface subsidence form classification system which characterized in that, this system includes:
a memory storing computer executable instructions;
a processor executing computer executable instructions in the memory, the processor performing the steps of:
setting earth surface subsidence observation point groups aiming at a construction area, and measuring left and right line earth surface subsidence data of each observation point group;
drawing space curves of left and right lines of each observation point group according to the earth surface subsidence data, and further obtaining a space evolution rule of earth surface subsidence of the construction area; sequentially analyzing the theoretical solution without complex peripheral settlement of the space curve, the numerical model without complex peripheral environment, the numerical model under the complex peripheral environment and actual working condition measured data to obtain the difference of the earth surface settlement under different conditions, namely the space evolution rule;
classifying the subsiders according to space evolution rules, namely the difference of earth surface subsidence under different conditions, wherein the smaller subsider at the center of the offset tunnel line with the largest subsidence value is a typical subsider; the settling tank with the maximum settling value far away from the center of the tunnel is a part of regular settling tank; the settling tank with smaller settling value in the middle of the tunnel and larger settling value at the two ends is an irregular settling tank; the sedimentation tank with unobvious regularity of sedimentation value due to data missing is a data missing sedimentation tank;
classifying the space curves according to the classification of the settling tanks, respectively obtaining time evolution rules of different categories according to the earth surface subsidence change of the face passing through the early, middle and later stages of the measuring points, combining the space evolution rules and the time evolution rules of each category of settling tanks to obtain the time and space evolution rules of earth surface subsidence of shield construction, and realizing earth surface subsidence form classification of shield construction.
4. The classification system for subsidence morphology of a shield construction surface of claim 3 wherein the construction area is an area having a complex surrounding environment.
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| CN112052274A (en) * | 2020-07-31 | 2020-12-08 | 武汉轻工大学 | Data mining method for rock stratum subway shield construction ground surface settlement rule |
| CN112380757B (en) * | 2020-12-14 | 2022-10-14 | 青岛理工大学 | Analysis method for offset distance of surface subsider peak point during construction of curved tunnel |
| CN113806843A (en) * | 2021-09-01 | 2021-12-17 | 北京住总集团有限责任公司 | Deformation analysis system and method based on dynamic fluctuation of bottom of sedimentation tank |
| CN114462185B (en) * | 2021-11-30 | 2022-12-06 | 中国建筑第五工程局有限公司 | Method for estimating five-dimensional evolution of space form of surface subsider caused by tunnel construction |
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