CN115730378A - Decision method and system for tunnel construction method for complex geological conditions - Google Patents
Decision method and system for tunnel construction method for complex geological conditions Download PDFInfo
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Abstract
The invention relates to the technical field of tunnel engineering, and discloses a decision method for a tunnel construction method for complex geological conditions, which comprises the following steps: s1: collecting investigation information of tunnel construction; s2: analyzing safety and stability factors in the tunnel construction process according to the investigation information; s3: determining an evaluation item of a tunnel construction method according to the safety and stability factors; s4: establishing a tunnel construction mathematical model according to the investigation information, and establishing a tunnel construction physical model according to the tunnel construction mathematical model; s5: carrying out construction method simulation through a tunnel construction physical model to obtain evaluation item parameters; s6: and selecting a construction method according to the evaluation item parameters. According to the tunnel construction method, safety stability factors in the tunnel construction process are analyzed, the tunnel construction mathematical model and the tunnel construction physical model are sequentially established, simulation is carried out through the tunnel construction physical model, so that the tunnel construction method is evaluated and selected, site geological conditions can be met, and the safety of tunnel construction is guaranteed.
Description
Technical Field
The invention relates to the technical field of tunnel engineering, in particular to a decision-making method and a decision-making system for a tunnel construction method for complex geological conditions.
Background
Along with the development of tunnel engineering towards deep burying and growing up, the problem of engineering disasters is increasingly highlighted. Particularly, in western mountainous areas with complex geological environments, when a tunnel passes through unfavorable geological combination sections such as high ground stress, soft rocks (such as phyllite, mudstone and the like), fault fracture zones and the like, the support is damaged due to obvious plastic deformation of surrounding rocks, the construction period is delayed, and huge loss is brought. Therefore, the construction of highway tunnels in mountain cities faces complex geological conditions and ground environments such as karst strata, gas-containing strata, ground structures and the like. Under such construction environment, the construction of the highway tunnel not only faces the hazards of water inrush, gas, geological fault and the like, but also needs to ensure the stability of the ground structure.
At present, the construction methods of large-section tunnels have various types and complex processes, and common construction methods include a middle partition wall method (CD method) or a crossed middle partition wall method (CRD), a double-side-wall pit guiding method, a step method and construction methods with different forms derived on the basis of the basic construction method types. Various construction methods are characterized by step-by-step construction, but the knowledge of the applicable conditions of the step-by-step construction of the large-section tunnel only stays on a qualitative level, so that the decision of the step-by-step construction of the large-section tunnel at the present stage mostly depends on the engineering experience of technical personnel in charge and the knowledge of surrounding rock conditions after tunnel excavation, and the selection of the construction method lacks effective and rigorous theoretical basis and relevant standards.
In view of the fact that the geological conditions and the construction process of tunnel engineering have obvious uncertainty, how to reasonably predict and evaluate the risk of tunnel construction is to adopt a reasonable tunnel construction method aiming at different geological environments to ensure the safe construction of the tunnel and the stability of ground structures, so that effective management and prevention control are carried out, and the method becomes a problem to be solved urgently in the current tunnel safe construction
Disclosure of Invention
The invention aims to provide a decision method for a tunnel construction method for complex geological conditions, which can meet the site geological conditions and ensure the safety of tunnel construction by analyzing safety and stability factors in the tunnel construction process, sequentially establishing a tunnel construction mathematical model and a tunnel construction physical model, and performing simulation through the tunnel construction physical model to evaluate and select the tunnel construction method.
The technical scheme provided by the invention is as follows: a decision method for a tunnel construction method for complex geological conditions, comprising:
s1: collecting investigation information of tunnel construction;
s2: analyzing safety and stability factors in the tunnel construction process according to the investigation information;
s3: determining an evaluation item of a tunnel construction method according to the safety and stability factors;
s4: establishing a tunnel construction mathematical model according to the investigation information, and establishing a tunnel construction physical model according to the tunnel construction mathematical model;
s5: carrying out construction method simulation through a tunnel construction physical model to obtain evaluation item parameters;
s6: and selecting a construction method according to the evaluation item parameters.
The working principle and the advantages of the invention are as follows: the method firstly collects the investigation information of the tunnel construction site for studying and judging the specific safety and stability factors during the construction of the highway tunnel under the complex geological condition, and forms an evaluation item of the tunnel construction method from the aspect of the safety of tunnel construction on the basis. And then, according to actual engineering conditions, sequentially establishing a mathematical model and a physical model of the road tunnel construction under the complex geological conditions, wherein the physical model has uniqueness and reality of an object. And carrying out construction method simulation on the construction safety through a tunnel construction physical model to obtain evaluation item parameters. And finally, selecting a proper construction method of the highway tunnel under the complex geological condition by comparing evaluation item parameters of different construction methods. The method of the invention makes up the defects that the selection of the prior construction method lacks effective and rigorous theoretical basis and relevant standards. When highway tunnels constructed in mountain cities face complex geological conditions such as karst strata, gas-containing strata, ground structures and the like and ground environments, reasonable construction method selection is provided, the site geological conditions can be met, and the safety of tunnel construction is ensured.
Further, the research information includes geological information and design information.
The investigation information comprises geological information and design information, the geological information is external environment information of a tunnel site, the design information is internal design and construction information of tunnel engineering, and the investigation information combined internally and externally can provide reliable reference for subsequent safety and stability factor analysis and model establishment.
Further, the geological information comprises stratum lithology, surrounding rock mechanical properties, geological structure, ground structure and hydrogeological conditions, and the design information comprises a tunnel plan view, a longitudinal section view and a main hole building boundary.
According to the actual condition of the highway tunnel construction under the complex geological condition, the geological information is refined into the lithology of the stratum, the mechanical property of surrounding rocks, the geological structure, the ground structure and the hydrogeological condition, and the design information is refined into a tunnel plane graph, a longitudinal section graph and a main tunnel building boundary line. And a foundation is provided for the implementation of the subsequent selection of the construction method.
Further, the safety stability factors include poor geological sites, ground affecting structure and tunnel stability.
The method considers the safety of tunnel construction from three aspects of unfavorable geological sites, ground influence structures and tunnel stability, and meets the actual safety requirements of sites.
Further, the evaluation items include surrounding rock stress, vault subsidence, arch waist convergence, gas emission quantity, gas pressure, ground structure subsidence and ground structure inclination.
The evaluation items are used as the basis for selecting the construction method, so that the evaluation and the selection of the proper construction method are facilitated.
Further, the evaluation item also includes economic cost and construction period.
Besides the consideration of construction safety, economic cost and construction period are introduced as evaluation items, and the economy and the timeliness of tunnel engineering are considered.
Further, the tunnel construction mathematical model is a gas-solid coupled multi-field mathematical model, and the gas-solid coupled multi-field mathematical model comprises a constitutive model of materials such as rock, concrete and soil, a tunnel gas desorption flow model and a ground building simplified model.
The mathematical model for the construction of the highway tunnel under the complex geological condition is a gas-solid coupled multi-field mathematical model, and a simplified form and a mathematical model of each safety and stability factor need to be considered. Therefore, a constitutive model of materials such as rock, concrete and soil, a tunnel gas desorption flow model and a ground building simplified model are respectively established to represent the safety and stability factor relation of tunnel construction.
Further, in the constitutive model of the materials such as rock, concrete and soil, the expression of the yield criterion of the materials such as rock, concrete and soil is as follows:
in the formula
Mean stress or static horizontal pressure, { S } bias stress, { beta } material constant, [ M]Is [ 2 ] in the Mises yield criterion M ]C is cohesion;
in the tunnel gas desorption flow model, the gas desorption of the gas coal bed is represented as:
wherein X is the gas quantity adsorbed by a combustible base unit mass when the adsorption equilibrium gas pressure is p, a is the limit adsorption quantity of coal unit mass, B is Langmuir constant, c is the coal quality correction coefficient, p is the coal gas pressure, n is the porosity of the coal, and B is a constant coefficient term;
the diffusion of the gas is expressed as:
wherein Df is Fick diffusion coefficient,
and
the components of the concentration gradient of the component A in the directions of coordinates x, y and z are respectively, and the minus sign represents the direction of the molecular diffusion flux along the concentration reduction direction;
the flow of gas in the tunnel is expressed as:
wherein μ is a viscosity coefficient, u ns As a velocity vector, p 0 Reference density, p, for mixed gases ns Is pressure, F is external volumetric force;
the flow of gas in the mining fracture is expressed as:
wherein k is the permeability of the sampling stabilization zone.
The state equation of the gas-air mixed gas in the tunnel is as follows:
wherein M is the molecular weight of the gas and R is the universal constant of the gas
In the ground building simplified model, the distance from the neutral axis of the beam to the bottom plate of the beam is as follows:
in the formula, i is the number of floors of a building; a. The i Is the area of the floor; hi is the height of each floor to the floor of the floor.
The moment of inertia I of the beam is:
the overall stiffness W of the building is:
W＝EI
wherein E is the equivalent elastic modulus of the structure.
In the constitutive model of materials such as rock, concrete and soil, the materials such as rock, concrete and soil belong to granular materials, the compressive yield strength of the materials is far greater than the tensile yield strength, the granules can expand when the materials are tensioned, and in soil mechanics, the Drucker-Prager yield criterion can describe the strength of the materials more accurately, so the Drucker-Prager yield criterion is used as the constitutive model of the materials such as rock, concrete and soil. In the tunnel gas desorption flow model, a gas-containing stratum is subjected to pressure relief under the influence of tunnel excavation to generate gas, and coal rock is a dual-pore medium which is formed by a framework consisting of coal particles containing molecular-scale pores and fractures among the coal particles. Under the influence of tunnel excavation, gas is desorbed and released from the coal bed and gushes out of the tunnel and the tunnel face through a fracture network in the surrounding rock. And respectively representing gas desorption, diffusion and flow of the gas coal seam so as to accurately predict related characteristic parameters of gas emission. In the simplified model of the ground building, tunnel construction may affect the existing ground building, and the safety and stability of the ground building need to be considered. Because the ground building has structural rigidity, the ground building can play a role in restraining the stratum displacement under the action of the rigidity, and the ground building is simplified according to a coaction principle and the integral rigidity of the ground building is expressed.
Further, a construction method is selected according to the evaluation item parameters, for the construction method with the evaluation item parameters not meeting relevant regulations, a construction method exceeding the strength of the relevant primary lining material adopts a negative control system, and for the construction method with the evaluation item meeting the relevant regulations, comprehensive comparison is adopted for selection.
Through a mode of one-ticket denial and comprehensive comparison, the most appropriate construction method is convenient to select.
The invention also provides a decision-making system for the tunnel construction method for the complex geological condition, which adopts the decision-making method for the tunnel construction method for the complex geological condition.
Drawings
FIG. 1 is a logic block diagram of a decision method for a tunnel construction method for complex geological conditions according to an embodiment of the present invention;
fig. 2 is a tunnel construction physical model diagram of a decision method of a tunnel construction method for a complex geological condition according to an embodiment of the present invention.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
The reference numbers in the drawings of the specification include: a tunnel 1, a gas-containing bottom layer 2 and a ground existing building 3 are planned.
Example (b):
as shown in fig. 1, this embodiment discloses a method for evaluating the continuous operation capability of an individual industrial and commercial company, which specifically includes the following steps (in this scheme, the numbering of each step is only used for distinguishing the steps, the specific execution sequence of each step is not limited, and each step can be performed simultaneously):
s1: and collecting the investigation information of tunnel construction. The method comprises the steps of collecting investigation information of highway tunnel construction, wherein the investigation information comprises geological information and design information, the geological information comprises stratum lithology, surrounding rock mechanical properties, geological structures, ground structures and hydrogeological conditions, and the design information comprises a tunnel plane graph, a longitudinal section graph and a main tunnel building limit. And a foundation is provided for the implementation of the subsequent selection of the construction method.
S2: and analyzing safety and stability factors in the tunnel construction process according to the investigation information. The construction of the highway tunnel under the complex geological condition faces many factors which harm the safety and stability of the tunnel, and according to the investigation information of the steps, the safety and stability factors related to the highway tunnel in the construction process are judged, the safety and stability factors in the embodiment include adverse geological sites (gas-containing stratums, goafs, karst caves, constructional zones and the like), ground influence structures (ground buildings, roads, oil and gas pipelines and the like), tunnel stability (tunnel self stability and mutual influence of left and right lines of the tunnel) and the like, and are specifically shown in table 1:
TABLE 1
And taking the judged safety and stability factors as comparison terms for implementing the subsequent selection method.
S3: and determining an evaluation item of the tunnel construction method according to the safety and stability factors. In the face of complex geological environment, reasonable and proper construction method can be adopted to ensure the safety and stability of the construction of the highway tunnel, and according to the safety and stability factors analyzed in the steps, the evaluation items of the construction method of the highway tunnel under the complex geological conditions are determined by combining the economic benefit, the construction period and other factors of the tunnel construction, wherein the evaluation items comprise surrounding rock stress, vault subsidence, arch convergence, gas emission quantity, gas pressure, ground structure subsidence quantity and ground structure inclination value.
Adverse geological phenomena such as a goaf and a karst cave affect the stability of a tunnel structure and cause water inrush; the structural belt affects the stability of the tunnel structure; gas is discharged from gas-containing strata, so that the construction safety is influenced; the stability of the structure of the tunnel needs to be ensured in the construction engineering; meanwhile, the construction of the tunnel cannot cause the influence of safety and stability on the existing ground structures. The stability of the tunnel structure can be judged by whether the stress of the surrounding rock exceeds the structural strength of the primary lining material and whether the sinking amount of the vault and the waist convergence amount of the tunnel conform to related regulations; the gas emission from the gas-containing stratum can be judged according to whether the gas emission quantity and the gas pressure meet relevant regulations or not; the safety and stability of the existing ground structure can be judged by whether the settlement and the inclination of the structure meet related regulations or not. The factors are analyzed, the economic cost, the construction period and other factors of the construction method are considered at the same time, and an evaluation item parameter table of the road tunnel construction method under the complex geological conditions is formed, and is shown in the table 2:
TABLE 2
S4: and establishing a tunnel construction mathematical model according to the investigation information, and establishing a tunnel construction physical model according to the tunnel construction mathematical model. A mathematical model for highway tunnel construction under complex geological conditions is a gas-solid coupled multi-field mathematical model, and a simplified form and a mathematical model of each safety and stability factor need to be considered.
The gas-solid coupled multi-field mathematical model comprises a constitutive model of materials such as rock, concrete and soil, a tunnel gas desorption flow model and a ground building simplified model.
In the constitutive model of materials such as rock, concrete and soil, the materials such as rock, concrete and soil belong to granular materials, the compressive yield strength of the materials is far greater than the tensile yield strength, the granules can expand when the materials are tensioned, and in soil mechanics, the Drucker-Prager yield criterion can describe the strength of the materials more accurately, so the Drucker-Prager yield criterion is used as the constitutive model of the materials such as rock, concrete and soil.
In the formula I 1 ＝σ 1 +σ 2 +σ 3 ，
Alpha and kappa are experimental constants,
σ i is the principal stress and φ is the internal friction angle.
For the Drucker-Prager model, the equivalent stress is expressed as:
in the formula
Mean stress or static horizontal pressure, { S } bias stress, { beta } material constant, [ M]Is [ M ] in the Mises yield criterion]And C is cohesion.
Therefore, the expression of the yield criterion of materials such as rock, concrete and soil is as follows:
in the tunnel gas desorption flow model, a gas-containing stratum is subjected to pressure relief under the influence of tunnel excavation to generate gas, and coal rock is a dual-pore medium which is formed by a framework consisting of coal particles containing molecular-scale pores and fractures among the coal particles. And (3) desorbing and releasing the gas from the coal bed under the influence of tunnel excavation, and gushing out from the tunnel and the tunnel face through a fracture network in the surrounding rock.
Desorption of coal rock gas is a very complex process, usually expressed by Langmuir's isothermal adsorption equation:
wherein X is the gas quantity m3/t absorbed by a combustible base unit mass when the adsorption equilibrium gas pressure is p at a certain temperature, a is the limit adsorption quantity m3/kg of coal unit mass, B is Langmuir constant MPa-1,c is a coal quality correction coefficient, p is the coal body gas pressure MPa, n is the porosity of the coal, and B is a constant coefficient term m 3/(t.MPa).
The transport of gas from the media surface and primary pores into the fracture system is a diffusion process. The diffusion of the gas follows Fick's first diffusion law, which is expressed as:
wherein Df is Fick diffusion coefficient m2/s,
and
the components mol/(m 3. M) of the concentration gradient of the component A in the directions of coordinates x, y and z, respectively, and the minus sign indicates the direction in which the molecular diffusion flux decreases along the concentration.
The flow of gas in the tunnel can be regarded as pipeline flow, the Navier-Stokes motion equation can well describe the flow rule of fluid in the pipeline, and the expression is as follows:
wherein μ is a viscosity coefficient kg/(m.s), u ns Is the velocity vector m/s, p 0 Is reference density kg/m3, p of mixed gas ns Pressure Pa, and external volume force F
The gas in the coal rock flows to the tunnel and the tunnel face through the surrounding rock fracture network, so that a Brinkman equation which considers a fluid viscosity shear stress term in a Navier-Stokes equation on the basis of a Darcy equation is adopted:
wherein k is the permeability of the sampling stabilization zone.
Meanwhile, in a closed system, if there are a plurality of chemical components or there is exchange of substances, each component must satisfy the conservation law of component mass. The component conservation equation of component s is
In the formula, c s 、ρc s And D s Respectively, the volume concentration, mass concentration and diffusion coefficient of the component s, and Ss is the mass of the component produced by a chemical reaction per volume within a unit time inside the system, i.e., the production rate.
Meanwhile, the gas-air mixed gas in the tunnel is assumed to be ideal mixed gas. The state equation of the system is shown in the specification,
wherein M is the molecular weight of the gas and R is the universal constant of the gas.
In the simplified model of the ground building, tunnel construction affects the existing ground building, and the safety and stability of the ground building need to be considered. Because the ground building has structural rigidity, the ground building can play a role in restraining the stratum displacement under the action of the rigidity, and the ground building is simplified according to a coaction principle. The building can be seen as a thin beam consisting of n-slabs, each of which may have a different thickness and width, and a filling material, the distance between the two slabs varying with the height between the floors, while the thickness of the slabs is negligible with respect to the height of the building. Assuming that each floor receives stress of unit size, in order to obtain each characteristic of stress of the thin beam, the distance from the neutral axis of the beam to the bottom plate of the beam is:
in the formula, i is the number of floors of a building; a. The i Is the area of the floor; hi is the height of each floor to the floor of the floor.
The moment of inertia I of the beam is then:
the overall stiffness W of the building is then:
W＝EI
wherein E is the equivalent elastic modulus of the building.
The superstructure load is selected according to the information investigated in the above step.
And establishing a physical model of the construction of the road tunnel under the complex geological condition by COMSOL Multiphysics simulation software in combination with geological information and design information of the information transferred in the step and the established mathematical model of the tunnel construction, as shown in figure 2.
S5: and carrying out construction method simulation through the tunnel construction physical model to obtain evaluation item parameters. After the construction physical model is established, the tunnel construction under each construction method is simulated through the tunnel construction physical model, and the tunnel surrounding rock stress value, the tunnel vault subsidence, the tunnel vault convergence, the gas emission quantity, the gas emission pressure, the ground structure subsidence, the ground structure inclination value, the economic cost and the construction period of each construction method are obtained, and the evaluation parameters are obtained.
S6: and selecting a construction method according to the evaluation item parameters. And comparing evaluation item parameters such as tunnel surrounding rock stress value, tunnel vault subsidence, tunnel arch convergence, gas emission quantity, gas emission pressure, ground structure subsidence and ground structure inclination value in detail under each construction method, and determining reasonable construction methods of the highway tunnel under complex geological conditions. For the construction method of which the evaluation item parameters do not meet the relevant regulations, the construction method exceeding the strength of the relevant primary lining material adopts a rule rejection system, and for the construction method of which the evaluation item meets the relevant regulations, a comprehensive comparison mode is adopted for selection according to the specific conditions (economic cost, construction period and the like) of construction.
The embodiment also discloses a decision system of the tunnel construction method for the complex geological condition, and the system adopts the decision method of the tunnel construction method for the complex geological condition.
The foregoing are merely exemplary embodiments of the present invention, and no attempt is made to show structural details of the invention in more detail than is necessary for the fundamental understanding of the art, the description taken with the drawings making apparent to those skilled in the art how the several forms of the invention may be embodied in practice with the teachings of the invention. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (10)
1. A decision-making method for a tunnel construction method for complex geological conditions, characterized by comprising:
s1: collecting investigation information of tunnel construction;
s2: analyzing safety and stability factors in the tunnel construction process according to the investigation information;
s3: determining an evaluation item of a tunnel construction method according to the safety and stability factors;
s4: establishing a tunnel construction mathematical model according to the investigation information, and establishing a tunnel construction physical model according to the tunnel construction mathematical model;
s5: carrying out construction method simulation through a tunnel construction physical model to obtain evaluation item parameters;
s6: and selecting a construction method according to the evaluation item parameters.
2. The method of claim 1, wherein the method comprises: the research information includes geological information and design information.
3. The decision method for a tunnel construction method for complex geological conditions according to claim 2, characterized in that: the geological information comprises stratum lithology, surrounding rock mechanical properties, geological structures, ground structures and hydrogeological conditions, and the design information comprises a tunnel plane graph, a longitudinal section graph and a main tunnel building boundary.
4. The decision method for a tunnel construction method for complex geological conditions according to claim 1, characterized in that: the safety stability factors include poor geological site, ground affecting structure and tunnel stability.
5. The decision method for a tunnel construction method for complex geological conditions according to claim 1, characterized in that: the evaluation items comprise surrounding rock stress, vault subsidence, arch waist convergence, gas emission quantity, gas pressure, ground structure subsidence and ground structure inclination value.
6. The decision method for a tunnel construction method for complex geological conditions according to claim 5, characterized in that: the evaluation item also includes economic cost and construction period.
7. The decision method for a tunnel construction method for complex geological conditions according to claim 1, characterized in that: the tunnel construction mathematical model is a gas-solid coupled multi-field mathematical model, and the gas-solid coupled multi-field mathematical model comprises a constitutive model of materials such as rock, concrete and soil, a tunnel gas desorption flow model and a ground building simplified model.
8. The decision method for a tunnel construction method for complex geological conditions according to claim 7, characterized in that: in the constitutive model of the materials such as the rock, the concrete, the soil and the like, the expression of the yield criterion of the materials such as the rock, the concrete, the soil and the like is as follows:
in the formula
Mean stress or static horizontal pressure, { S } bias stress, { beta } material constant, [ M]Is [ M ] in the Mises yield criterion]C is cohesion;
in the tunnel gas desorption flow model, the gas desorption of the gas coal bed is represented as:
wherein X is the gas quantity adsorbed by a combustible base unit mass when the adsorption equilibrium gas pressure is p, a is the limit adsorption quantity of coal unit mass, B is Langmuir constant, c is the coal quality correction coefficient, p is the coal gas pressure, n is the porosity of the coal, and B is a constant coefficient term;
the gas diffusion is expressed as:
wherein Df is Fick diffusion coefficient,
and
the components of the concentration gradient of the component A in the directions of coordinates x, y and z are respectively, and the minus sign represents the direction of the molecular diffusion flux along the concentration reduction direction;
the flow of gas in the tunnel is expressed as:
wherein μ is a viscosity coefficient, u ns As a velocity vector, p 0 Is the reference density, p, of the mixed gas ns Is pressure, F is external volumetric force;
the state equation of the gas-air mixed gas in the tunnel is as follows:
wherein M is the molecular weight of the gas and R is the universal constant of the gas
In the ground building simplified model, the distance from the neutral axis of the beam to the bottom plate of the beam is as follows:
in the formula, i is the number of floors of the building; a. The i Is the area of the floor; hi is the height of each floor to the floor of the floor.
The moment of inertia I of the beam is:
the overall stiffness W of the building is:
W＝EI
wherein E is the equivalent elastic modulus of the building.
9. The decision method for a tunnel construction method for complex geological conditions according to claim 1, characterized in that: and selecting a construction method according to the evaluation item parameters, adopting a rule denial system for the construction method of which the evaluation item parameters do not accord with relevant regulations and the construction method of which the evaluation item parameters exceed the relevant primary lining material strength, and adopting comprehensive comparison for selection of the construction method of which the evaluation item accords with the relevant regulations.
10. A decision-making system that is used for tunnel construction worker method of complicated geological conditions, its characterized in that: the system employs the method of any one of claims 1 to 9 for decision making of a tunnel construction method for complex geological conditions.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116384129A (en) * | 2023-04-10 | 2023-07-04 | 重庆中环建设有限公司 | Prediction method for disaster characteristics of highway tunnel passing through karst stratum |
| CN116401872A (en) * | 2023-04-10 | 2023-07-07 | 重庆中环建设有限公司 | Method for evaluating construction stability of small-clearance highway tunnel in complex geological environment |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109871576A (en) * | 2018-12-30 | 2019-06-11 | 中铁上海工程局集团有限公司 | A kind of tunnel construction method |
| CN110489926A (en) * | 2019-09-02 | 2019-11-22 | 北京交通大学 | A kind of Construction of Submarine Tunnel course control method for use and system based on stratum deformation |
| CN113011116A (en) * | 2021-05-25 | 2021-06-22 | 中国矿业大学(北京) | Coal particle micropore diffusion coefficient and dimensionless numerical value inversion method |
| CN113189297A (en) * | 2021-03-24 | 2021-07-30 | 山东大学 | Roadway excavation induced coal and gas outburst overall process quantitative simulation test method |
| CN114357706A (en) * | 2021-12-01 | 2022-04-15 | 中国矿业大学(北京) | Gas extraction influence factor analysis method based on fluid-solid coupling |
| CN114704265A (en) * | 2020-11-17 | 2022-07-05 | 中铁六局集团有限公司交通工程分公司 | Construction method for subway shield tunnel to pass through viaduct tunnel downwards |
-
2022
- 2022-12-07 CN CN202211580135.0A patent/CN115730378B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109871576A (en) * | 2018-12-30 | 2019-06-11 | 中铁上海工程局集团有限公司 | A kind of tunnel construction method |
| CN110489926A (en) * | 2019-09-02 | 2019-11-22 | 北京交通大学 | A kind of Construction of Submarine Tunnel course control method for use and system based on stratum deformation |
| CN114704265A (en) * | 2020-11-17 | 2022-07-05 | 中铁六局集团有限公司交通工程分公司 | Construction method for subway shield tunnel to pass through viaduct tunnel downwards |
| CN113189297A (en) * | 2021-03-24 | 2021-07-30 | 山东大学 | Roadway excavation induced coal and gas outburst overall process quantitative simulation test method |
| CN113011116A (en) * | 2021-05-25 | 2021-06-22 | 中国矿业大学(北京) | Coal particle micropore diffusion coefficient and dimensionless numerical value inversion method |
| CN114357706A (en) * | 2021-12-01 | 2022-04-15 | 中国矿业大学(北京) | Gas extraction influence factor analysis method based on fluid-solid coupling |
Non-Patent Citations (3)
| Title |
|---|
| YOUPING XU 等: "Multi-field coupling theory and research progress of methane extraction in deep coal seams: A review", 《JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING》, vol. 107 * |
| 王云青: "卵砾石层隧道围岩稳定性分析及施工技术研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》, no. 1, pages 034 - 684 * |
| 舒安齐: "含煤隧道围岩稳定性分析及支护结构优化", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》, no. 8, pages 034 - 304 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116384129A (en) * | 2023-04-10 | 2023-07-04 | 重庆中环建设有限公司 | Prediction method for disaster characteristics of highway tunnel passing through karst stratum |
| CN116401872A (en) * | 2023-04-10 | 2023-07-07 | 重庆中环建设有限公司 | Method for evaluating construction stability of small-clearance highway tunnel in complex geological environment |
| CN116401872B (en) * | 2023-04-10 | 2024-01-23 | 重庆中环建设有限公司 | Method for evaluating construction stability of small-clearance highway tunnel in complex geological environment |
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