Design and Control Method of Prefabricated Integrated Utility Tunnel in Soft Soil Foundation under Traffic Load

Abstract

The present invention belongs to the technical field of the construction and management of urban underground utility tunnels, and discloses a design and control method for a prefabricated integrated power utility tunnel in soft soil foundation under traffic load. The design and control method for the prefabricated integrated power utility tunnel in soft soil foundation under traffic load includes: determining the dynamic response characteristics of the prefabricated integrated utility tunnel in soft soil foundation under traffic load; determining the energy transfer and deformation mechanism of the prefabricated utility tunnel system in soft soil foundation under traffic load; determining the analysis theory and calculation method of the underground utility tunnel in soft soil foundation under traffic load. The present invention studies for the first time the dynamic response of prefabricated underground utility tunnels in soft soil foundation under traffic load and the dynamic interaction between soft soil and utility tunnels, reveals the force and deformation mechanism and failure mode of the utility tunnel structure in soft soil foundation under traffic load; improves the structural analysis theory of prefabricated integrated utility tunnels, and proposes an analysis model, calculation technology and control method for prefabricated integrated utility tunnels in soft soil foundation under traffic load, providing a theoretical basis for the design of utility tunnels.

Description

Technical Field

[0001] The invention belongs to the technical field of urban underground utility tunnel construction and management, and particularly relates to a design and control method for a precast integrated power utility tunnel in soft soil foundation under traffic load. Background Technique

[0002] With the development of China's economy and transportation industry, the urban transportation is characterized by new features such as increased traffic volume, increased load (even overloading), and increased vehicle speed. These new features of traffic load also pose serious challenges to the normal use and safe operation of underground utility tunnels. Therefore, more attention needs to be paid to the mechanical properties of underground utility tunnels under traffic load. The repeated action of traffic load will cause irreversible permanent settlement deformation of soft soil foundation. Differences in the upper loads of each section and the differences in the anti-uneven deformation ability of different sections may all lead to uneven settlement or lateral displacement of the underground utility tunnel, resulting in the dislocation, excessive opening or extrusion of the expansion joints of the tunnel; factors such as unilateral settlement or uneven reinforcement may lead to the occurrence of lateral torsion diseases of the tunnel. This may cause excessive local stress in the concrete structure of the tunnel, and the internal force and deformation of the structure may exceed the limit. Therefore, considering the influence of factors such as traffic load in soft soil areas, and deeply studying the stress and deformation problems of underground utility tunnels and corresponding measures for different structures, has important theoretical significance and engineering application value.

[0003] So far, there have been relevant research results, mainly concentrated in culverts and underground tunnels. Yu Zhankui carried out longitudinal similarity model tests on tunnels, and studied the distribution and properties of the soil layer under the tunnel under the action of local uniform load, the influence of different surface surcharges and their action positions, and the assembly method on the stress and deformation of the tunnel structure. Xu Ling simulated the uneven soil layer under the tunnel and the local uniform load on the surface through a similar structure model test, and analyzed the longitudinal settlement morphology of the soil layer in various cases. Wang Zhan used the finite element numerical simulation method to analyze the reasons for the longitudinal settlement of the tunnel, the stress and deformation mechanism and waterproof failure mechanism of the tunnel structure after uneven longitudinal settlement occurred. Wang Peiqin believes that the deformation of the immersed tunnel is mainly caused by the recompression deformation of soft soil, and the change of pore water pressure and the seepage of water inside the soil will have a greater impact on the subsequent settlement. Li Peng et al. studied the control index values for the uneven settlement of cross-river tunnels caused by longitudinal bending. At the same time, for the longitudinal uneven settlement of cross-river tunnels caused by circumferential dislocation, the reasonable value of relative bending was studied. Shanghai has put forward clear control values for the longitudinal curvature radius and relative bending of subway shield tunnels. There are great differences in the existing regulations on the allowable value of foundation settlement, and many allowable values are obtained based on engineering experience. At present, there are few relevant research results on underground utility tunnels.

[0004] In the related research field of underground culverts, Boris Rakitin and Ming Xu studied the response of a reinforced concrete pipe with a diameter of 1400 mm under the action of a traffic load of 850 kN through a series of geotechnical centrifuge tests, and considered the influence of the depth of the overlying soil layer, the position and magnitude of the traffic load on the pipe moment. Nelson and Weidlinger studied the dynamic response of pipelines in non-uniform sites and found that the displacement at the pipeline joint position would increase when the stiffness of the soil changed. Hindy analyzed pipelines in different media by combining the static Mindlin solution with plane dynamic strain and found that the stress of the pipeline was the greatest at the position where the medium changed. Kim et al. studied the variation law of the earth pressure borne by underground box structures by means of numerical simulation. Wu Xiaogang, Zhang Tuqiao, etc. carried out a theoretical study on the mechanical property analysis model of pipelines in soft soil foundations under the action of traffic loads on the basis of elastic theory. Shen Wenming et al. established a relatively reasonable longitudinal mechanical model of buried culverts considering the differential settlement of the foundation by using the Pasternak two-parameter foundation model. Their research shows that the deflection, rotation angle, moment, and shear force of the culvert structure all have sudden changes at the differential settlement, and the influence range of each element by uneven settlement is limited. Wang Xu et al. analyzed the influence of the elastic modulus of different soft soil foundations on the longitudinal stress and vertical displacement of extra-long culverts. Wu Yanling studied the mechanical and deformation characteristics of corrugated steel pipe culverts, analyzed the mechanical and deformation laws under different filling heights and traffic loads, found that the pipe top and its orthogonal position were the most unfavorable for stress and deformation under different filling heights, and proposed to control the design with the earth pressure on the top of the culvert under high filling conditions. Gou Wenjin carried out a series of studies on the mechanical properties and deformation characteristics of buried pipelines under the action of soil self-weight, static load, and vehicle load, and believed that there was a theoretically optimal burial depth for buried pipelines, and the dangerous points of buried pipelines were related to the restraint conditions at both ends of the pipeline.

[0005] The non-uniformity of soil layers, the asymmetry of ground loads, etc. can lead to asymmetric loads on underground structures, causing changes in structural deformation and internal force magnitudes, and even causing the overall displacement of the underground structure to one side. Leung C M, Zheng Gang, etc. studied related issues such as the change patterns of the lateral bearing capacity of tunnels and the tunnel structure morphology under different loosening angles and degrees on the side of the tunnel. Bi Xiangli, etc. studied the bearing capacity of segmental linings with continuous joints through full-scale tests, obtained the bearing capacity safety factors of tunnel structures under the conditions of top overload and bilateral unloading, and considered that the tunnel structure is more unfavorably stressed under bilateral unloading. Wang Rulu, etc. established a three-dimensional solid model by using ABAQUS to study the influence of ground ballast, soil lateral pressure coefficient and soil resistance coefficient on the development of tunnel lateral deformation, and proposed the tunnel diameter change as the judgment index for the development of tunnel lateral structural behavior. Zhu Bin studied the relationship between the horizontal diameter deformation of the tunnel, the maximum opening of the joint, the maximum concrete stress, etc. under the assumption that the vertical load on the tunnel remains unchanged and the horizontal load becomes smaller, and proposed the deformation control limit of the tunnel cross-section. Regarding the influence of surface asymmetric loads, there are not many systematic research results. Wu Yongping established an interaction model of "supporting body - surrounding rock" for laneways (tunnels) through a large number of on-site observations, introduced an asymmetric load factor and a structural analysis method, studied the internal force and deformation performance of different types of supporting bodies under asymmetric load conditions, discussed the influence of asymmetric loads on the bearing capacity and shrinkable performance of the supporting body, and accordingly gave the design elements of the laneway (tunnel) supporting body under this condition. The research by Gao Mingzhong shows that the surrounding rock with poor lithology or more fragmented and the laneway with a larger width are more affected by the asymmetric load ratio, and there will be a certain deflection of the floor pressure of the laneway. Zhang Shuming, etc. constructed a three-dimensional model of a corrugated steel pipe culvert under eccentric load by using finite element software, compared and studied the stress and deformation characteristics of the corrugated steel pipe culvert and the soil pressure around the pipe under eccentric load and symmetric load, clarified the maximum values and forms of the horizontal and vertical deformations of the corrugated pipe under eccentric load, and the existence of eccentric load will have a greater impact on the stability of the pipe culvert.

[0006] So far, there has been relatively little systematic research on the relatively new underground structure of the underground utility tunnel at home and abroad. Marshall A M carried out theoretical derivation and analysis on the interaction between the underground utility tunnel and the soil mass from factors such as the buried depth of the tunnel, the stiffness of the soil mass, and the force transmission method. Sharma J S studied and analyzed the influence of large-scale excavation on adjacent structures, and believed that the settlement deformation caused by large-scale excavation is an important reason affecting the stiffness of the structure. Structures with too high stiffness are more likely to generate greater bending moments, which is unfavorable to the structure. Hunt D V L elaborated in detail on the layout scheme of the utility tunnel, including the influence of factors such as the buried depth of the tunnel, the setting position, and the construction method on society and the environment, and analyzed in detail the advantages and disadvantages of various forms of utility tunnels. V.P. Petrukhin introduced the construction of a utility tunnel using shield technology under existing building structures, and believed that a cut-off wall can be used to control the deformation of existing structures caused by foundation settlement; a method for determining the range of the area affected by the construction of the underground utility tunnel was proposed, and it was considered that the width of the affected area depends on the specific construction parameters of the tunnel and the mechanical properties of the surrounding soil mass, etc.

[0007] In terms of research on the deformation and its control of the underground utility tunnel in China. Xue Weichen et al. from Tongji University in Shanghai studied the precast prestressed underground utility tunnel through full-scale tests and proposed a design method for the joints of precast prestressed underground utility tunnels. The results show that under the action of equal-value symmetric loads on the four side walls, the joints have good ductility, deformation ability, and safety omen, but the waterproof performance and overall mechanical performance at the joints of precast assembled underground utility tunnels are weak, and their test conditions cannot reflect the actual mechanical state of the structure. Tan Jun et al. evaluated the safety of the utility tunnel using fuzzy theory. The existing conditions of the utility tunnel were considered, such as steel bar corrosion, concrete cracking, structure water seepage, and soil liquefaction, etc. It was considered that the bearing capacity decreases with the increase of the degree of steel bar corrosion, and soil liquefaction has an obvious influence on the settlement of the structure. Tian Zixuan, Jiang Hongbin et al. carried out experimental research on the mechanical properties of the connection nodes and the overall cross-section of the utility tunnel, but there was no research on the bonding performance of the composite surface directly affecting the overall performance of the structure, as well as the longitudinal connection performance of the utility tunnel under uneven settlement, slip, and seismic action along the longitudinal direction of the tunnel. Wang Kui et al. based on the continuous medium finite element method, used ABAQUS to establish a three-dimensional finite element model of the soil mass and the utility tunnel, carried out numerical simulation calculations on the stress distribution and displacement changes of the soil mass and the utility tunnel during the normal use stage, and carried out a comparative analysis on the stress and displacement changes of the key parts of the utility tunnel under different buried depths. Zhong Yuanzhi analyzed the respective characteristics of several main calculation modes of the utility tunnel structure, and used the finite element software (Midas Gen) to carry out static analysis on a proposed single-cell and double-cell underground utility tunnel structure respectively, but did not consider the characteristics of vehicle dynamic loads and their long-term effects.

[0008] Regarding the dynamic characteristics of the underground utility tunnel, the research results mainly focus on the study of seismic effects. O’Rourk et al. analyzed the mechanical characteristics of the utility tunnel under seismic conditions and concluded that its seismic damage is caused by the combined action of the relative deformation of the surrounding soil and seismic waves, indicating that the movement of the soil and seismic excitation are the primary reasons for the instability of underground space structures such as utility tunnels. Beaty studied the damage of utility tunnels caused by liquefaction; Shamsabadi et al. studied the soil-structure interaction mechanism between the utility tunnel and the surrounding soil and proposed a reinforcement plan based on their research results. Kimura et al. explored the improvement effect of optimized construction methods on the seismic performance of utility tunnels. Grigorios Tsinidis studied the dynamic response of tunnels in soft soil foundations under lateral seismic excitation. Li Jie et al. analyzed the experimental phenomena of the shaking table model of the underground utility tunnel through longitudinal seismic excitation experiments. Tang Aiping et al. conducted seismic response analysis of the utility tunnel using experimental and numerical simulation techniques, and the results showed that there is a significant soil-structure interaction in the dynamic response of the utility tunnel. Yang Jian, Wang Hengdong et al. used FLAC software to conduct seismic response analysis of the underground utility tunnel in liquefied soil with Kobe ground motion input, and explored the variation laws of soil acceleration, excess pore pressure ratio, deformation of the tunnel and soil, and internal forces of the structure. Ye Fei used ABAQUS software to conduct three-dimensional seismic response analysis of the utility tunnel, the surrounding soil, and the pipe support system in the ditch. Shi Xiaojun, Liu Shuhong et al. carried out large-scale shaking table model test research on the underground utility tunnel, and studied the boundary effect of the model box, soil acceleration response, deformation response, and dynamic response of the joints. The research results of Shi Youzhi et al. showed that under the same reduction coefficient conditions, compared with static action, the internal forces of the structure under dynamic action increase significantly. The existing research results can provide a basic theoretical basis for the research and design of the mechanical properties of precast segmental utility tunnels under seismic action.

[0009] Regarding traffic loads and their impact on underground structures. K.Yamamoto et al. studied the influence of surface loads on two-way tunnels in soft soil under plane strain conditions both theoretically and numerically, and simulated the loads continuously applied to the ground and smooth interface conditions using finite element software. Qiu Minyu, Niu Xirong et al. believed through research that the change of wheel load has a greater impact on the vertical additional stress in the subgrade. The influence depth of the dynamic response caused by traffic loads in soft soil foundations is generally in the range of 6 - 10m. Cao Lilin believed through research that excessive overloading rate, too fast or too slow driving speed will cause an increase in subgrade response and have a greater impact on the road structure system. The superimposed effect of loads becomes obvious with the increase of depth.

[0010] Existing research shows that: the settlement caused by dynamic disturbance is an inducement that cannot be ignored for the settlement of soft soil tunnels. The Shanghai Dapu Road Tunnel once had serious water leakage due to longitudinal uneven settlement caused by ground overloading. Pi Yingxing et al. simulated the vehicle load as the sum of self-weight and sine load and studied the response of shallow-buried tunnel linings under vehicle loads. Shao Zhushan et al. studied the influence of traffic loads on the stability of shallow-buried loess tunnels. Song Haoran et al. obtained the stress conditions of shallow-buried tunnels under surface loads and overburden of surrounding rocks, and analyzed the laws of the influence of tunnel radius and surface loads on the stability of surrounding rocks. As an underground structure with shallow burial, the dynamic effect of vehicles on the underground utility tunnel is more significant. Therefore, the actual influence of vehicle loads should be fully considered in the design of underground utility tunnels. However, so far, there have been no representative results in the research on the dynamic characteristics of underground utility tunnels under traffic loads.

[0011] It can be seen from the existing relevant research results that the current research on the dynamic response of tunnels under traffic loads mainly focuses on the dynamic analysis under simple axisymmetric loads, which is quite different from the dynamic response of tunnels under general traffic loads (usually non-axisymmetric).

[0012] Since the construction process of underground utility tunnels is similar to that of subways, tunnels and underground culverts, in actual work, underground utility tunnels are often constructed according to experience and in accordance with standards equal to or slightly higher than relevant standards. However, there are significant differences in functions and requirements between underground utility tunnels and subways, tunnels and underground culverts, and their design standard requirements should be adapted accordingly. From the perspective of the loading mode, the urban underground utility tunnel has a shallow burial depth, and earth pressure is the dominant control factor for the structural behavior. It is greatly disturbed by traffic loads. In the comprehensive utility tunnel project under soft soil geological conditions, the mutual influence between its various structures or parts is more significant. At present, there are certain differences between the calculation assumptions on which the structural calculation model of the underground utility tunnel project is based and the actual situation, and the influence under asymmetric loads is not considered, including the lateral and longitudinal deformations and internal forces of the utility tunnel structure under asymmetric loads, and the calculation of the change in earth pressure is not considered.

[0013] In summary, at present, there is little in-depth research at home and abroad on the mechanical behavior response of underground utility tunnel structures under soft soil geological conditions, the damage or diseases of each part and their mechanisms, and rarely consider the various adverse effects of vehicle loads (especially heavy loads) and their impact effects on shallow-buried underground utility tunnel structures under actual traffic conditions. There is still a lack of understanding of the deformation mechanism and its laws of operating utility tunnels under traffic loads and research on methods for controlling allowable deformations. The Technical Code for Urban Utility Tunnel Engineering does not clearly stipulate how to consider the effects of surrounding vehicle loads, etc. in the design and construction of utility tunnels. There are no available engineering reference results for issues such as what indicators to use to measure the structural safety during the deformation development process and how to determine the control standards, especially for the utility tunnel structures in soft soil areas, and the safety of their behavior urgently needs further in-depth research. Prefabrication has become the main development direction of the design of underground utility tunnel structures in China in recent years, which poses practical and theoretical requirements for the mechanical properties and control of prefabricated utility tunnels in soft soil foundations under the influence of traffic loads. Therefore, it is necessary to systematically study the dynamic response and dynamic interaction mechanism of prefabricated utility tunnels in soft soil foundations under traffic loads.

[0014] Through the above analysis, the problems and defects existing in the existing technology are as follows:

[0015] (1) Although the Technical Code for Urban Utility Tunnel Engineering of China, GB50838-2015, has been issued and implemented, it does not give specific standards for detailed design, construction methods, materials and equipment, etc., and the corresponding standard system in China is not yet perfect.

[0016] (2) There are significant differences in the existing regulations on allowable values of foundation settlement, and many allowable values are obtained based on engineering experience. There are few relevant research results on underground utility tunnels at present; there is little systematic research on this relatively new underground structure of underground utility tunnels at home and abroad, and there are no representative results in the research on the dynamic characteristics of underground utility tunnels under traffic loads.

[0017] (3) The existing technology uses finite element software (Midas Gen) to conduct static analysis on a proposed single-cell and double-cell underground utility tunnel structure respectively, but does not consider the characteristics of vehicle dynamic loads and their long-term effects.

[0018] (4) Currently, the research on the dynamic response of tunnels under traffic loads mainly focuses on the dynamic analysis under simple axisymmetric loads, which is quite different from the dynamic response of tunnels under general traffic loads (usually non-axisymmetric).

[0019] (5) At present, there are certain differences between the calculation assumptions on which the structural calculation models for underground utility tunnels are based and the actual situation. The influence of the structure under asymmetric loads is not considered either, including the lateral and longitudinal deformations and internal forces of the utility tunnel structure under asymmetric loads, and the calculation of the change in earth pressure is not considered.

[0020] (6) At present, there is little in-depth research at home and abroad on the mechanical behavior response of underground utility tunnel structures under soft soil geological conditions, the damage or diseases of each part and their mechanisms, and the adverse effects of vehicle loads (especially heavy loads) and their impact effects on shallow-buried underground utility tunnel structures under actual traffic conditions are rarely considered.

[0021] (7) The existing technologies lack understanding of the deformation mechanism and its laws of operating utility tunnels under traffic loads and research on the allowable deformation control methods. The technical code for urban utility tunnel engineering does not clearly stipulate how to consider the effects of surrounding vehicle loads, etc. in the design and construction of utility tunnels.

[0022] The difficulty in solving the above problems and defects is:

[0023] The significance in solving the above problems and defects is: Summary of the Invention

[0024] In view of the problems existing in the prior art, the present invention provides a design and control method for a precast power utility tunnel in soft soil foundation under traffic loads.

[0025] The present invention is implemented as follows. A design and control method for a precast power utility tunnel in soft soil foundation under traffic loads, the design and control method for the precast power utility tunnel in soft soil foundation under traffic loads includes the following steps:

[0026] Step 1, determining the dynamic response characteristics of the precast utility tunnel in soft soil foundation under traffic loads;

[0027] Step 2, determining the energy transfer and deformation mechanism of the precast tunnel system in soft soil foundation under traffic loads;

[0028] Step 3, determining the analysis theory and calculation method of the underground utility tunnel in soft soil foundation under traffic loads.

[0029] Further, in Step 1, the determination of the dynamic response characteristics of the precast utility tunnel in soft soil foundation under traffic loads includes:

[0030] Based on large-scale model tests, determine the dynamic response characteristics of the dynamic interaction system of typical precast integrated pipe corridors under traffic loads. Analyze the longitudinal and transverse forces, deformation characteristics and their variation laws of typical precast assembled pipe corridor structures when relevant parameters change in terms of soil layer properties, vehicle load, vehicle dynamic load coefficient, distance from the pipe corridor to the lane and buried depth of the pipe corridor. Determine the response mechanism, and establish an analysis model and theoretical calculation method for the dynamic response characteristics of precast integrated pipe corridors in soft soil foundations under traffic loads.

[0031] Furthermore, in step two, the determination of the energy transfer and deformation mechanism of the precast pipe corridor system in soft soil foundation under traffic loads includes:

[0032] Based on the model test and the energy principle, conduct three-dimensional refined modeling and analysis of the soft soil-pipe corridor nonlinear system, analyze the energy transfer process of the soft soil-pipe corridor system under traffic loads, and determine the stress and deformation modes of typical precast pipe corridor structures in soft soil foundations, including the damage failure mechanism of typical joint structures of the pipe corridor.

[0033] Furthermore, in step three, the determination of the analysis theory and calculation method of the underground integrated pipe corridor in soft soil foundation under traffic loads includes:

[0034] Based on the determined dynamic response characteristics of precast integrated pipe corridors in soft soil foundations under traffic loads and the energy transfer and deformation mechanism of the precast pipe corridor system in soft soil foundations under traffic loads, based on the elastic-plastic theory and soil-pipe corridor interaction, systematically analyze the variation laws of earth pressure and internal forces of precast pipe corridor structures over time; through refined finite element model numerical simulation analysis, determine the deformation, strength and stiffness characteristics of precast pipe corridor structures in soft soil foundations, establish the analysis theory, model and calculation method of precast integrated pipe corridor structures in soft soil foundations, and propose design control indicators.

[0035] Furthermore, the design and control method of the precast integrated power pipe corridor in soft soil foundation under traffic loads also includes:

[0036] Based on the similarity theory and the orthogonal test design theory, guide the design of indoor model tests. Through dynamic loading tests on physical models, determine the stress, displacement, deformation development mode and failure mechanism of the models under traffic loads.

[0037] Furthermore, the design and control method of the precast integrated power pipe corridor in soft soil foundation under traffic loads also includes:

[0038] Based on model tests, determine the modeling method of prefabricated integrated pipe galleries under soft soil foundation conditions, including the selection of soil constitutive models, the determination of parameters of the concrete damage plasticity model, the establishment of artificial boundary conditions, the simulation of soil-pipe gallery interaction, and the input method of traffic loads, and establish a structural mechanics analysis model of the underground integrated pipe gallery; through three-dimensional dynamic elastoplastic finite element analysis, analyze the time-varying characteristics of the structural internal forces of prefabricated pipe galleries in soft soil foundation under the action of asymmetric traffic loads under the influence of relevant factors; conduct refined modeling analysis on typical joints, systematically analyze the stress and deformation of typical joints under the action of asymmetric traffic loads, and analyze the damage failure mechanism of pipe gallery joints and the joint failure mode.

[0039] Furthermore, the design and control method of prefabricated integrated power pipe galleries in soft soil foundation under traffic loads further includes:

[0040] Analyze the nonlinear characteristics among various elements within the system and their interactions with the external system during the process of the deformation and failure of the pipe gallery in soft soil foundation under asymmetric traffic loads from gestation, excitation to development, and use catastrophe and dynamics theories to study the damage and failure behavior of this nonlinear dynamic system during the spatio-temporal evolution process;

[0041] Use the strength reduction technique to calculate the safety factor and permanent displacement of the prefabricated underground pipe gallery structure in soft soil foundation under traffic loads; analyze the damage effect and its law of the underground pipe gallery under traffic loads, combine the theoretical calculation results with test data, determine the damage and failure mechanism of the underground pipe gallery system, and at the same time propose the analysis and design method and control indexes of the integrated pipe gallery structure in soft soil foundation under traffic loads.

[0042] Another object of the present invention is to provide a design and control system for prefabricated integrated power pipe galleries in soft soil foundation under traffic loads applying the design and control method of prefabricated integrated power pipe galleries in soft soil foundation under traffic loads. The design and control system for prefabricated integrated power pipe galleries in soft soil foundation under traffic loads includes:

[0043] A model construction module for establishing an analysis model of the dynamic response characteristics of prefabricated integrated pipe galleries in soft soil foundation under traffic loads based on large-scale model tests;

[0044] A dynamic response characteristic determination module for determining the dynamic response characteristics of prefabricated integrated pipe galleries in soft soil foundation under traffic loads based on the analysis model of the dynamic response characteristics of prefabricated integrated pipe galleries in soft soil foundation under traffic loads;

[0045] A mechanism determination module for conducting three-dimensional refined modeling analysis on the soft soil-pipe gallery nonlinear system based on the energy principle to determine the energy transfer and deformation mechanism of the prefabricated pipe gallery system in soft soil foundation under traffic loads;

[0046] The underground comprehensive pipeline corridor analysis module is used to determine the analysis theory and calculation method of the underground comprehensive pipeline corridor in soft soil foundation under traffic load, and propose design control indicators.

[0047] Another object of the present invention is to provide a computer device, the computer device comprising a memory and a processor, the memory storing a computer program, and when the computer program is executed by the processor, the processor performs the following steps:

[0048] (1) Determine the dynamic response characteristics of prefabricated utility tunnels in soft soil foundations under traffic loads;

[0049] (2) Determine the energy transfer and deformation mechanism of the prefabricated pipe gallery system in soft soil foundation under traffic load;

[0050] (3) Determine the analysis theory and calculation method of underground comprehensive pipeline corridors in soft soil foundations under traffic loads.

[0051] Another object of the present invention is to provide an information data processing terminal, which is used to implement the design and control system of the prefabricated integrated power pipeline corridor in the soft soil foundation under the traffic load.

[0052] Combining all the above technical solutions, the advantages and positive effects of the present invention are as follows: the design and control method of the prefabricated integrated power pipeline corridor in the soft soil foundation under traffic load provided by the present invention studies the dynamic response of the prefabricated and assembled underground pipeline corridor in the soft soil foundation under traffic load and the dynamic interaction between the soft soil and the pipeline corridor for the first time, and reveals the stress deformation mechanism and failure mode of the pipeline corridor structure in the soft soil foundation under traffic load; improves the structural analysis theory of the prefabricated and assembled integrated pipeline corridor, and proposes the analysis model, calculation technology and design control method of the prefabricated integrated pipeline corridor in the soft soil foundation under traffic load.

[0053] The present invention uses full-scale model tests, three-dimensional numerical models, theoretical research, and field test verification to deeply study the dynamic response law of typical prefabricated pipeline corridor structures in soft soil foundations under traffic loads, reveal the energy transfer process of the soft soil-pipeline corridor system under traffic loads, and explore the force mechanism, deformation, strength and stiffness characteristics of the prefabricated pipeline corridor structure in soft soil foundations; proposes an analysis model for the dynamic response characteristics of prefabricated comprehensive pipeline corridors in soft soil foundations under traffic loads, establishes an analysis theory and calculation method for prefabricated comprehensive pipeline corridor structures in soft soil foundations, and proposes design control indicators, which can provide a theoretical basis for pipeline corridor design, construction and structural performance risk assessment.

[0054] The present invention deeply studies the mechanical and deformation characteristics of prefabricated and assembled underground utility tunnels in soft soil foundations under traffic loads, especially the influence of asymmetric traffic loads on the tunnel structure and the corresponding deformation control indexes, and emphasizes the fundamentality, originality, and interdisciplinary nature of the research. At the same time, the present invention combines physical model tests, three-dimensional numerical analysis, and field tests, and conducts research on the dynamic characteristics of prefabricated utility tunnels in soft soil areas and the dynamic interaction between soft soil and utility tunnels under traffic loads within the theoretical frameworks of mechanics, underground space engineering, etc. It has distinct characteristics both theoretically and methodologically, as follows:

[0055] (1) Based on theories such as nonlinear theory and the interaction between soft soil and utility tunnels, a method combining three-dimensional refined physical and mechanical model tests with three-dimensional refined numerical models is proposed to explore the influence laws of multiple parameters on the performance of the tunnel structure, establish a refined modeling theory for utility tunnels in soft soil foundations under traffic loads, simulate the failure mechanism of the tunnel through the dynamic finite element method, and reveal the failure modes and failure criteria of the tunnel structure and its shear connectors;

[0056] (2) Aiming at the dynamic problems of prefabricated utility tunnels in soft soil foundations under traffic loads, using catastrophe theory, damage fracture mechanics, and dynamics theory, considering the nonlinear effects of tunnel damage and failure and the dynamic coupling effects of environmental media, through theoretical analysis, finite element refined model analysis, and experimental research, reveal the mechanical characteristics and working performance of the tunnel structure; study its failure mechanism and performance evaluation method under traffic loads from both macroscopic and mesoscopic levels, and establish a design theory and method for prefabricated and assembled tunnel structures.

[0057] (3) It has a good theoretical foundation and research accumulation in aspects such as the deformation and stability analysis of geotechnical and underground structures, the mechanism and model of multi-field coupling, the theory of fracture damage and progressive failure, numerical simulation, and earthquake resistance of engineering structures.

[0058] (4) The present invention not only pays attention to the macroscopic mechanical response of underground utility tunnels under traffic loads over time, but also pays attention to the evolution of physical mechanisms and structural characteristics at the mesoscopic scale; it not only attaches importance to the modeling and testing of three-dimensional refined mechanical and physical models, but also emphasizes the modeling and analysis of three-dimensional refined numerical models. It not only attaches importance to model test research, but also attaches importance to theoretical analysis, so as to achieve the organic integration of model tests, numerical simulations, and theoretical analysis, and the internal unity of macroscopic and mesoscopic.

[0059] (5) By absorbing the frontier theoretical achievements of multiple disciplines such as soil dynamics, underground engineering, damage fracture mechanics, catastrophe theory, and nonlinear theory, and adopting comprehensive research methods such as indoor tests, theoretical analysis, and numerical simulation, paying attention to the combination of theoretical research and experimental research, qualitative description and quantitative analysis, macroscopic mechanical analysis and mesoscopic mechanism research, and numerical simulation and experimental verification, thus providing the correct technical approach for the success of the present invention.

[0060] Therefore, the present invention can achieve a breakthrough in the mechanical behavior of the utility tunnel in soft soil foundation under traffic loads, the interaction mechanism between soft soil and structure, and design control, and achieve the expected research goals. Description of the Drawings

[0061] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments of the present invention. Obviously, the following described drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work.

[0062] Figure 1 It is a flowchart of the design and control method for the precast power utility tunnel in soft soil foundation under traffic loads provided by an embodiment of the present invention.

[0063] Figure 2 It is a schematic diagram of the design and control method for the precast power utility tunnel in soft soil foundation under traffic loads provided by an embodiment of the present invention.

[0064] Figure 3 It is a structural block diagram of the design and control system for the precast power utility tunnel in soft soil foundation under traffic loads provided by an embodiment of the present invention;

[0065] In the figure: 1. Model construction module; 2. Dynamic response characteristic determination module; 3. Mechanism determination module; 4. Underground utility tunnel analysis module. Detailed Embodiments

[0066] In order to make the purpose, technical solutions and advantages of the present invention clearer, the following further details the present invention in conjunction with embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0067] Aiming at the problems existing in the prior art, the present invention provides a design and control method for the precast power utility tunnel in soft soil foundation under traffic loads. The following describes the present invention in detail with reference to the drawings.

[0068] As Figure 1 shown, the design and control method for the precast power utility tunnel in soft soil foundation under traffic loads provided by an embodiment of the present invention includes the following steps:

[0069] S101. Determine the dynamic response characteristics of the precast utility tunnel in soft soil foundation under traffic loads;

[0070] S102. Determine the energy transfer and deformation mechanism of the precast tunnel system in soft soil foundation under traffic loads;

[0071] S103. Determine the analysis theory and calculation method of the underground utility tunnel in soft soil foundation under traffic loads.

[0072] The schematic diagram of the design and control method of the precast integrated power utility tunnel in soft soil foundation under traffic loads provided by the embodiment of the present invention is as Figure 2 shown.

[0073] As Figure 3 shown, the design and control system of the precast integrated power utility tunnel in soft soil foundation under traffic loads provided by the embodiment of the present invention includes:

[0074] Model construction module 1, which is used to establish an analysis model of the dynamic response characteristics of the precast integrated utility tunnel in soft soil foundation under traffic loads based on large-scale model tests;

[0075] Dynamic response characteristic determination module 2, which is used to determine the dynamic response characteristics of the precast integrated utility tunnel in soft soil foundation under traffic loads based on the analysis model of the dynamic response characteristics of the precast integrated utility tunnel in soft soil foundation under traffic loads;

[0076] Mechanism determination module 3, which is used to perform three-dimensional refined modeling analysis on the soft soil-tunnel nonlinear system based on the energy principle to determine the energy transfer and deformation mechanism of the precast tunnel system in soft soil foundation under traffic loads;

[0077] Underground utility tunnel analysis module 4, which is used to determine the analysis theory and calculation method of the underground utility tunnel in soft soil foundation under traffic loads and propose design control indicators.

[0078] The technical solution of the present invention will be further described below in conjunction with the embodiments.

[0079] 1. Invention content, objectives, and key scientific problems to be solved 1.1 Invention content

[0081] 1) Research on the dynamic response characteristics of the precast integrated utility tunnel in soft soil foundation under traffic loads

[0082] Based on large-scale model tests, study the dynamic response characteristics of the dynamic interaction system of the typical structure of the precast integrated utility tunnel under traffic loads. Analyze the longitudinal and transverse stress, deformation characteristics and their change laws of the typical precast assembled tunnel structure when relevant parameters change from aspects such as soil layer properties, vehicle load, vehicle dynamic load coefficient, distance from the tunnel to the lane, and buried depth of the tunnel cover soil, explore its response mechanism, and establish an analysis model and theoretical calculation method of the dynamic response characteristics of the precast integrated utility tunnel in soft soil foundation under traffic loads.

[0083] 2) Research on the energy transfer and deformation mechanism of the precast tunnel system in soft soil foundation under traffic loads

[0084] Based on model tests and the energy principle, a three-dimensional refined modeling analysis of the soft soil - pipe gallery nonlinear system is carried out. The energy transfer process of the soft soil - pipe gallery system under traffic loads is deeply studied, and the force - deformation modes of typical precast pipe gallery structures in soft soil foundations, including the damage mechanisms of typical pipe gallery joint structures, are explored.

[0085] 3) Research on the analysis theory and calculation methods of underground utility tunnels in soft soil foundations under traffic loads

[0086] On the basis of the above research, based on the elastoplastic theory and soil - pipe gallery interaction, the variation laws of earth pressure and internal forces of precast pipe gallery structures with time are systematically studied. Through numerical simulation analysis of a refined finite - element model, the deformation, strength, and stiffness characteristics of precast pipe gallery structures in soft soil foundations are revealed. An analysis theory, model, and calculation method for precast integrated pipe gallery structures in soft soil foundations are established, and design control indexes are proposed.

[0087] 1.2 Invention Objectives

[0088] Through full - scale model tests, three - dimensional numerical models, theoretical research, and combined with on - site test verification, the dynamic response laws of typical precast pipe gallery structures in soft soil foundations under traffic loads are deeply studied. The energy transfer process of the soft soil - pipe gallery system under traffic loads is revealed, and the force mechanisms, deformation, strength, and stiffness characteristics of precast pipe gallery structures in soft soil foundations are explored. An analysis model for the dynamic response characteristics of precast integrated pipe galleries in soft soil foundations under traffic loads is proposed. An analysis theory and calculation method for precast integrated pipe gallery structures in soft soil foundations are established, and design control indexes are proposed, which can provide a theoretical basis for pipe gallery design, construction, and structural state risk assessment, etc.

[0089] 1.3 Key Scientific Problems to be Solved

[0090] 1) Dynamic response characteristics and energy transfer mechanism of the nonlinear system of precast pipe galleries in soft soil foundations under traffic loads

[0091] In order to essentially understand and master the influence laws of traffic loads on the stress and deformation of precast assembled integrated pipe gallery structures in soft soil foundations, including the lateral and longitudinal settlements, inclinations, flexures, and torsions generated by load characteristics on the pipe gallery structures, based on model tests, studying the dynamic response characteristics of the pipe gallery and the energy transfer mechanism of the soft soil - pipe gallery nonlinear system is the key to establishing an analysis model of integrated pipe galleries in soft soil foundations under traffic loads.

[0092] 2) Analysis model and calculation method of integrated pipe galleries in soft soil foundations

[0093] Based on the soil-tunnel structure interaction, establishing the relationship between soil pressure and structural displacement and deformation of precast assembled utility tunnels in soft soil foundation under traffic load, and constructing a calculation optimization analysis model and analytical method for tunnel structure are the key to establishing the analysis theory and design method of precast tunnels in soft soil foundation under traffic load.

[0094] 2. Invention Scheme and Feasibility Analysis

[0095] 2.1 Invention Scheme

[0096] The present invention deeply studies the mechanical and deformation characteristics of precast assembled underground utility tunnels in soft soil foundation under traffic load, especially the influence of asymmetric traffic load on tunnel structure and the corresponding deformation control indexes, and pays attention to the fundamentality, originality and interdisciplinary nature of the research.

[0097] 2.1.1 Research Methods

[0098] (1) Experimental research. Based on the similarity theory and orthogonal experimental design theory, guiding the design of indoor model tests, and through dynamic loading tests on physical models, deeply studying the stress, displacement, deformation development mode and failure mechanism of the models under traffic load.

[0099] (2) Numerical simulation research. On the basis of model tests, studying the modeling method of precast assembled utility tunnels under soft soil foundation conditions, including the selection of soil constitutive models, the determination of concrete damage plasticity model parameters, the establishment of artificial boundary conditions, the simulation of soil-tunnel interaction and the input method of traffic load, etc., and establishing a mechanical analysis model of underground utility tunnel structure. Through three-dimensional dynamic elastoplastic finite element analysis, studying the time-varying characteristics of the structural internal force of precast tunnels in soft soil foundation under asymmetric traffic load under the influence of relevant factors. Conducting refined modeling analysis on typical joints, systematically studying the stress and deformation of typical joints under asymmetric traffic load, and analyzing the damage failure mechanism of tunnel joints and the joint failure mode.

[0100] (3) Theoretical research. Deeply analyzing the nonlinear characteristics among various elements within the system and their interaction with the external system during the process of the deformation and failure of tunnels in soft soil foundation under asymmetric traffic load from gestation, excitation to development, and using catastrophe and dynamics theory to study the damage and failure behavior of this nonlinear dynamic system during the spatio-temporal evolution process. Using strength reduction technology to calculate the safety factor and permanent displacement of precast assembled underground tunnel structures in soft soil foundation under traffic load. Deeply studying the damage effect and its law of underground tunnels under traffic load, combining the theoretical calculation results with test data, and exploring the damage and failure mechanism of underground tunnel systems. Proposing the analysis and design methods and control indexes for utility tunnel structures in soft soil foundation under traffic load.

[0101] 2.1.2 Technical Route (see Figure 2 )

[0102] 2.1.3 Experimental Means

[0103] Based on theoretical analysis, an entity model is established, and physical simulation is used to analyze the dynamic response characteristics of typical structures of prefabricated pipe corridors under actual traffic loads for comparison, complementation, and verification, aiming to comprehensively reflect the dynamic characteristics of the three-dimensional space of prefabricated pipe corridors in soft soil foundations under actual traffic loads, so as to accurately depict the stress and deformation characteristics of the pipe corridor structure in the three-dimensional full space.

[0104] 2.1.4 Key Technologies

[0105] (1) To reveal the overall mechanical characteristics of the pipe corridor structure in soft soil foundations under traffic loads, a large-scale prefabricated integrated pipe corridor structure test model is made for dynamic load tests. How to determine the similarity relationship and handle the boundary conditions of the model involves the effect and measurement accuracy of the model test.

[0106] (2) Based on nonlinear theory and the interaction between soft soil and pipe corridors, a reasonable three-dimensional structural computational mechanics analysis model of prefabricated pipe corridors is established to study the nonlinear dynamic effects of pipe corridor structures in soft soil foundations under traffic loads, which is one of the key technologies to essentially reveal the stress and deformation laws of prefabricated pipe corridor structures.

[0107] 2.2 Feasibility Analysis

[0108] (1) In terms of research foundation, the project applicant and the main members of the project team have long been engaged in scientific research work in aspects such as the analysis of deformation and stability of geotechnical and underground structures, numerical simulation of geomechanics, and seismic resistance of engineering structures. They have undertaken or participated in a number of National Natural Science Foundation projects, Hunan Provincial Natural Science Foundation projects, provincial and ministerial level scientific and technological research projects, and other department and bureau level projects related to the present invention, and have good theoretical foundations and research accumulations in aspects such as the analysis of deformation and stability of geotechnical and underground structures, multi-field coupling mechanisms and models, fracture damage and progressive failure theories, numerical simulation, and seismic resistance of engineering structures.

[0109] (2) In terms of academic thinking, the present invention not only attaches importance to the time-dependent macroscopic mechanical response of underground pipe corridors under traffic loads, but also attaches importance to the evolution of physical mechanisms and structural characteristics at the mesoscopic scale; it not only attaches importance to the modeling and testing of three-dimensional fine mechanical physical models, but also emphasizes the modeling and analysis of three-dimensional fine numerical models. It not only attaches importance to model test research, but also attaches importance to theoretical analysis, so as to achieve the organic integration of model tests, numerical simulations, and theoretical analysis, and the internal unity of macro and meso aspects.

[0110] (3) In terms of research methods, by absorbing the cutting-edge theoretical achievements of multiple disciplines such as soil dynamics, underground engineering, damage fracture mechanics, catastrophe theory, and nonlinear theory, the present invention adopts comprehensive research methods such as laboratory tests, theoretical analysis, and numerical simulation, emphasizing the combination of theoretical research and experimental research, qualitative description and quantitative analysis, macroscopic mechanical analysis and mesoscopic mechanism research, and numerical simulation and experimental verification, thus providing the correct technical approach for the success of the present invention.

[0111] Therefore, through the collaborative research and breakthrough of the project team, the present invention can make breakthroughs in the mechanical behavior of the integrated utility tunnel in soft soil foundation under traffic loads, the interaction mechanism between soft soil and structure, and design control, and achieve the expected research goals.

[0112] 3. Features and Innovations of the Present Invention

[0113] 3.1 Features of the Present Invention

[0114] The present invention combines physical model tests, three-dimensional numerical analysis, and in-situ tests, and conducts research on the dynamic characteristics of precast integrated utility tunnels in soft soil areas under traffic loads and the dynamic interaction between soft soil and utility tunnels within the theoretical frameworks of mechanics, underground space engineering, etc., with distinct features both theoretically and methodologically.

[0115] (1) Based on theories such as nonlinear theory and the interaction between soft soil and utility tunnel, a method combining three-dimensional refined physical and mechanical model tests with three-dimensional refined numerical models is proposed to explore the influence laws of multiple parameters on the structural performance of the utility tunnel, establish a refined modeling theory for the utility tunnel in soft soil foundation under traffic loads, simulate the failure mechanism of the utility tunnel through the dynamic finite element method, and reveal the failure modes and failure criteria of the utility tunnel structure and its shear connectors;

[0116] (2) Aiming at the dynamic problems of precast integrated utility tunnels in soft soil foundation under traffic loads, catastrophe theory, damage fracture mechanics, and dynamics theory are adopted, considering the nonlinear effects of damage and failure of the utility tunnel and the dynamic coupling influence of the environmental medium. Through theoretical analysis, finite element refined model analysis, and experimental research, the mechanical characteristics and working performance of the utility tunnel structure are revealed. The failure mechanism and performance evaluation method under traffic loads are studied from both macroscopic and mesoscopic levels, and a design theory and method for precast assembled utility tunnel structures are established.

[0117] 3.2 Innovations of the Present Invention

[0118] (1) For the first time, the dynamic response of precast assembled underground utility tunnels in soft soil foundation under traffic loads and the dynamic interaction between soft soil and utility tunnel are studied, revealing the stress and deformation mechanism and failure mode of the utility tunnel structure in soft soil foundation under traffic loads;

[0119] (2) Improve the theoretical analysis of the precast assembled integrated pipe gallery structure, and propose an analysis model, calculation technology and design control method for precast integrated pipe galleries in soft soil foundations under traffic loads.

[0120] Proof part (specific embodiments / experiments / simulations / positive experimental data that can prove the creativity of the present invention, etc.)

[0121] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented in whole or in part in the form of a computer program product, the computer program product includes one or more computer instructions. When the computer program instructions are loaded or executed on a computer, the processes or functions described in the embodiments of the present invention are generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center by wire (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that the computer can access or a data storage device such as a server or data center that includes one or more integrated available media. The available medium can be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)).

[0122] As mentioned above, the above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, any modification, equivalent replacement and improvement made within the spirit and principle of the present invention shall be covered by the protection scope of the present invention.

Claims

1. A design and control method for a precast integrated power pipe gallery in soft soil foundation under traffic loads, characterized in that, The design and control method of the precast integrated utility tunnel in soft soil foundation under traffic load includes the following steps: Step 1, determine the dynamic response characteristics of the precast integrated utility tunnel in soft soil foundation under traffic load; Step 2, determine the energy transfer and deformation mechanism of the precast utility tunnel system in soft soil foundation under traffic load; Step 3, determine the analysis theory and calculation method of the underground integrated utility tunnel in soft soil foundation under traffic load; In Step 1, the determination of the dynamic response characteristics of the precast integrated utility tunnel in soft soil foundation under traffic load includes: based on large-scale model tests, determine the dynamic response characteristics of the dynamic interaction system of the typical structure of the precast integrated utility tunnel under traffic load, and analyze the longitudinal and transverse stress, deformation characteristics and their variation laws of the typical precast assembled utility tunnel structure when relevant parameters change from aspects such as soil layer properties, vehicle load, vehicle dynamic load coefficient, distance from the utility tunnel to the lane and overburden depth of the utility tunnel, determine the response mechanism, and establish an analysis model and theoretical calculation method for the dynamic response characteristics of the precast integrated utility tunnel in soft soil foundation under traffic load; In Step 2, the determination of the energy transfer and deformation mechanism of the precast utility tunnel system in soft soil foundation under traffic load includes: on the basis of model tests, based on the energy principle, conduct three-dimensional refined modeling analysis on the soft soil-utility tunnel nonlinear system, analyze the energy transfer process of the soft soil-utility tunnel system under traffic load, and determine the stress and deformation modes of the typical precast utility tunnel structure in soft soil foundation, including the damage failure mechanism of the typical joint structure of the utility tunnel; In Step 3, the determination of the analysis theory and calculation method of the underground integrated utility tunnel in soft soil foundation under traffic load includes: based on the determined dynamic response characteristics of the precast integrated utility tunnel in soft soil foundation under traffic load and the energy transfer and deformation mechanism of the precast utility tunnel system in soft soil foundation under traffic load, based on the elastic-plastic theory and soil-utility tunnel interaction, systematically analyze the variation laws of earth pressure and internal force of the precast utility tunnel structure with time; through refined finite element model numerical simulation analysis, determine the deformation, strength and stiffness characteristics of the precast utility tunnel structure in soft soil foundation, establish the analysis theory, model and calculation method of the precast integrated utility tunnel structure in soft soil foundation, and propose design control indexes; The design and control method of the precast integrated utility tunnel in soft soil foundation under traffic load also includes: guiding the design of indoor model tests based on similarity theory and orthogonal experimental design theory, and determining the stress, displacement, deformation development mode and failure mechanism of the model under traffic load through dynamic loading tests on the physical model; The design and control method of the precast integrated power pipe gallery in soft soil foundation under traffic load also includes: based on model tests, determining the modeling method of the precast assembled integrated pipe gallery under soft soil foundation conditions, including the selection of soil constitutive models, the determination of concrete damage plasticity model parameters, the establishment of artificial boundary conditions, the simulation of soil-pipe gallery interaction, and the input method of traffic load, and establishing a structural mechanical analysis model of the underground integrated pipe gallery; through three-dimensional dynamic elastoplastic finite element analysis, analyzing the variation characteristics of the structural internal force of the precast pipe gallery in soft soil foundation under asymmetric traffic load over time under the influence of relevant factors; conducting refined modeling analysis on typical joints, systematically analyzing the stress and deformation of typical joints under asymmetric traffic load, and analyzing the damage failure mechanism of pipe gallery joints and the joint failure mode. The design and control method of the precast integrated power pipe gallery in soft soil foundation under traffic load also includes: analyzing the nonlinear characteristics among the internal elements of the system and their interaction with the external system during the process of the deformation and failure of the pipe gallery in soft soil foundation from gestation, excitation to development under asymmetric traffic load, and using catastrophe and dynamics theories to study the damage and failure behavior of this nonlinear dynamic system during the spatio-temporal evolution process. Using the strength reduction technique to calculate the safety factor and permanent displacement of the precast assembled underground pipe gallery structure in soft soil foundation under traffic load; analyzing the damage effect and its law of the underground pipe gallery under traffic load, combining the theoretical calculation results with the test data, determining the damage and failure mechanism of the underground pipe gallery system, and at the same time proposing the structural analysis and design method and control index of the integrated pipe gallery in soft soil foundation under traffic load.

2. A design and control system for a prefabricated integrated power pipe gallery in soft soil foundation under traffic load, which implements the design and control method of the prefabricated integrated power pipe gallery in soft soil foundation under traffic load described in claim 1, characterized in that, The design and control system of the precast integrated power pipe gallery in soft soil foundation under traffic load includes: A model construction module for establishing an analysis model of the dynamic response characteristics of the precast integrated pipe gallery in soft soil foundation under traffic load based on large-scale model tests. A dynamic response characteristic determination module for determining the dynamic response characteristics of the precast integrated pipe gallery in soft soil foundation under traffic load based on the analysis model of the dynamic response characteristics of the precast integrated pipe gallery in soft soil foundation under traffic load. A mechanism determination module for conducting three-dimensional refined modeling analysis on the soft soil-pipe gallery nonlinear system based on the energy principle to determine the energy transfer and deformation mechanism of the precast pipe gallery system in soft soil foundation under traffic load. An underground integrated pipe gallery analysis module for determining the analysis theory and calculation method of the underground integrated pipe gallery in soft soil foundation under traffic load and proposing design control indexes.

3. A computer device, characterized in that, The computer device includes a memory and a processor. When the computer program stored in the memory is executed by the processor, the processor executes the steps of the design and control method of the precast integrated power pipe gallery in soft soil foundation under traffic load as claimed in claim 1.

4. An information data processing terminal, characterized in that, The information data processing terminal is used to implement the design and control system of the precast integrated power pipe gallery in soft soil foundation under traffic load as claimed in claim 2.

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