Method and device for evaluating hydration degree of tunnel lining concrete

Abstract

This invention provides a method and apparatus for evaluating the hydration degree of tunnel lining concrete, relating to the field of data evaluation technology. The method includes: obtaining a first influence parameter of surrounding rock load and temperature on the heat release of cement mineral components during hydration, and a second influence parameter of humidity on the heat release of cement mineral components during hydration; determining a first influence factor for evaluating the hydration degree based on the surrounding rock load, a second influence factor based on the first influence parameter, and a third influence factor based on the second influence parameter; correcting the hydration heat release rate using a comprehensive correction coefficient based on the first, second, and third influence factors, and calculating the hydration degree of the tunnel lining concrete based on the corrected comprehensive correction coefficient. The apparatus performs the above method. The method and apparatus provided by this invention can accurately evaluate the hydration degree of tunnel lining concrete.

Description

Technical Field

[0001] This invention relates to the field of data evaluation technology, specifically to a method and apparatus for evaluating the hydration degree of tunnel lining concrete. Background Technology

[0002] The degree of cement hydration refers to the ratio of the amount of cement particles hydrated to the amount of cement fully hydrated within a certain time. Concrete strength development is a gradual process, and its degree and speed depend on the hydration status of the cement. Temperature and humidity within the tunnel during construction are crucial factors affecting the rate and extent of cement hydration. Simultaneously, an increasing number of deep-buried, large, and long tunnels are emerging, along with tunnels in complex geological environments. Reinforced concrete lining structures are subject to the coupled effects of static loads such as surrounding rock pressure, water pressure, and self-weight, as well as environmental factors such as temperature, humidity, and corrosive media. From the moment of pouring, tunnel concrete is subjected to the coupled effects of complex loads and environmental temperature and humidity, and the degree of concrete hydration is also simultaneously influenced by these factors. The degree of hydration characterizes the strength of tunnel concrete. If the strength of the tunnel concrete is insufficient, the risk of cracking and safety risks in the constructed lining concrete structure will significantly increase. Therefore, accurately assessing the degree of hydration of tunnel lining concrete and providing more suitable curing methods and models to ensure concrete strength development and reduce cracking and safety risks has become an urgent problem to be solved. Summary of the Invention

[0003] To address the problems in the prior art, embodiments of the present invention provide a method and apparatus for evaluating the hydration degree of tunnel lining concrete, which can at least partially solve the problems existing in the prior art.

[0004] On the one hand, this invention proposes a method for evaluating the hydration degree of tunnel lining concrete, including:

[0005] Obtain the first influence parameter of surrounding rock load and temperature on the heat release of cement mineral components hydration, and the second influence parameter of humidity on the heat release of cement mineral components hydration.

[0006] The first influencing factor for the evaluation of the degree of hydration is determined based on the surrounding rock load; the second influencing factor for the evaluation of the degree of hydration is determined based on the first influencing parameter; and the third influencing factor for the evaluation of the degree of hydration is determined based on the second influencing parameter.

[0007] The comprehensive correction coefficient for the hydration heat release rate is corrected based on the first influence factor, the second influence factor, and the third influence factor, and the degree of hydration of the tunnel lining concrete is calculated based on the corrected comprehensive correction coefficient for the hydration heat release rate.

[0008] The first influencing factor for determining the hydration degree evaluation based on the surrounding rock load includes:

[0009] Based on the change of the surrounding rock load over time, the change path of the surrounding rock load is obtained;

[0010] The negative value of the variation path of the surrounding rock load is used as the power of the exponential function to obtain the first influence factor.

[0011] The step of determining the second influencing factor for the hydration degree evaluation based on the first influencing parameter includes:

[0012] The first influence parameter is determined as the second influence factor.

[0013] The step of determining the third influencing factor for hydration degree evaluation based on the second influencing parameter includes:

[0014] The negative value of the second influencing parameter is used as the power of the exponential function to obtain the numerator;

[0015] The negative values ​​of the preset coefficients are used as the powers of the exponential function to obtain the denominator term;

[0016] The ratio of the numerator to the denominator is used as the third influencing factor.

[0017] The step of correcting the comprehensive correction coefficient for the hydration heat release rate based on the first influence factor, the second influence factor, and the third influence factor includes:

[0018] Multiply the first influence factor, the second influence factor, and the third influence factor by the comprehensive correction coefficient of the hydration heat release rate to obtain the corrected comprehensive correction coefficient of the hydration heat release rate.

[0019] The calculation of the degree of hydration of the tunnel lining concrete based on the comprehensive correction coefficient of the corrected hydration heat release rate includes:

[0020] The hydration heat release rate of each mineral clinker in cement is calculated based on the comprehensive correction coefficient of the corrected hydration heat release rate and the reference heat release rate of each mineral clinker in cement at the initial ambient temperature.

[0021] The heat release rate of the hydration system is calculated based on the hydration heat release rate of each mineral clinker in cement and the proportion of each mineral clinker in cement.

[0022] The degree of hydration of the tunnel lining concrete is calculated based on the heat release rate and the final cumulative heat release of the hydration system.

[0023] The calculation of the degree of hydration of the tunnel lining concrete based on the heat release rate and the final cumulative heat release of the hydration system includes:

[0024] By integrating the heat release rate of the hydration system over time, the cumulative heat release at different times can be obtained;

[0025] The ratio of the cumulative heat release at different times to the final cumulative heat release is used as the degree of hydration of the tunnel lining concrete.

[0026] On the one hand, the present invention proposes a device for evaluating the hydration degree of tunnel lining concrete, comprising:

[0027] The acquisition unit is used to acquire the first influence parameters of surrounding rock load and temperature on the heat release of cement mineral components hydration and the second influence parameters of humidity on the heat release of cement mineral components hydration.

[0028] The determining unit is used to determine a first influencing factor for the evaluation of the degree of hydration based on the surrounding rock load, a second influencing factor for the evaluation of the degree of hydration based on the first influencing parameter, and a third influencing factor for the evaluation of the degree of hydration based on the second influencing parameter.

[0029] The evaluation unit is used to correct the comprehensive correction coefficient of the hydration heat release rate according to the first influence factor, the second influence factor and the third influence factor, and to calculate the degree of hydration of the tunnel lining concrete according to the corrected comprehensive correction coefficient of the hydration heat release rate.

[0030] In another aspect, embodiments of the present invention provide an electronic device, including: a processor, a memory, and a bus, wherein,

[0031] The processor and the memory communicate with each other via the bus;

[0032] The memory stores program instructions that can be executed by the processor, and the processor can execute the following methods by calling the program instructions:

[0033] Obtain the first influence parameter of surrounding rock load and temperature on the heat release of cement mineral components hydration, and the second influence parameter of humidity on the heat release of cement mineral components hydration.

[0034] The first influencing factor for the evaluation of the degree of hydration is determined based on the surrounding rock load; the second influencing factor for the evaluation of the degree of hydration is determined based on the first influencing parameter; and the third influencing factor for the evaluation of the degree of hydration is determined based on the second influencing parameter.

[0035] The comprehensive correction coefficient for the hydration heat release rate is corrected based on the first influence factor, the second influence factor, and the third influence factor, and the degree of hydration of the tunnel lining concrete is calculated based on the corrected comprehensive correction coefficient for the hydration heat release rate.

[0036] This invention provides a non-transitory computer-readable storage medium, comprising:

[0037] The non-transitory computer-readable storage medium stores computer instructions that cause the computer to perform the following methods:

[0038] Obtain the first influence parameter of surrounding rock load and temperature on the heat release of cement mineral components hydration, and the second influence parameter of humidity on the heat release of cement mineral components hydration.

[0039] The first influencing factor for the evaluation of the degree of hydration is determined based on the surrounding rock load; the second influencing factor for the evaluation of the degree of hydration is determined based on the first influencing parameter; and the third influencing factor for the evaluation of the degree of hydration is determined based on the second influencing parameter.

[0040] The comprehensive correction coefficient for the hydration heat release rate is corrected based on the first influence factor, the second influence factor, and the third influence factor, and the degree of hydration of the tunnel lining concrete is calculated based on the corrected comprehensive correction coefficient for the hydration heat release rate.

[0041] The method and apparatus for evaluating the hydration degree of tunnel lining concrete provided in this invention obtain a first influence parameter of surrounding rock load and temperature on the hydration heat release of cement mineral components and a second influence parameter of humidity on the hydration heat release of cement mineral components; determine a first influence factor for evaluating the hydration degree based on the surrounding rock load, a second influence factor based on the first influence parameter, and a third influence factor based on the second influence parameter; correct the comprehensive correction coefficient of the hydration heat release rate based on the first influence factor, the second influence factor, and the third influence factor, and calculate the hydration degree of the tunnel lining concrete based on the corrected comprehensive correction coefficient of the hydration heat release rate, which can accurately evaluate the hydration degree of tunnel lining concrete. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:

[0043] Figure 1 This is a schematic flowchart of a method for evaluating the hydration degree of tunnel lining concrete according to an embodiment of the present invention.

[0044] Figure 2 This is a schematic diagram of the distribution curve of the effect of temperature on the heat release of cement mineral components during hydration, provided in an embodiment of the present invention.

[0045] Figure 3This is a schematic diagram of the distribution curve of the effect of humidity on the hydration heat release of cement mineral components, provided in an embodiment of the present invention.

[0046] Figure 4 This is a schematic diagram of the multi-year average temperature and humidity distribution curve of a tunnel project provided in an embodiment of the present invention.

[0047] Figure 5 This is a schematic diagram showing the magnitude and path of the load on the lining concrete of a tunnel project provided in an embodiment of the present invention.

[0048] Figure 6 This is a schematic diagram of the structure of a device for evaluating the hydration degree of tunnel lining concrete according to an embodiment of the present invention.

[0049] Figure 7 This is a schematic diagram of the physical structure of an electronic device provided in an embodiment of the present invention. Detailed Implementation

[0050] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Here, the illustrative embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be arbitrarily combined with each other.

[0051] Figure 1 This is a flowchart illustrating a method for evaluating the hydration degree of tunnel lining concrete according to an embodiment of the present invention, as shown below. Figure 1 As shown, the method for evaluating the hydration degree of tunnel lining concrete provided in this embodiment of the invention includes:

[0052] Step S1: Obtain the first influence parameter of surrounding rock load and temperature on the heat release of cement mineral hydration and the second influence parameter of humidity on the heat release of cement mineral hydration.

[0053] Step S2: Determine the first influencing factor for the evaluation of hydration degree based on the surrounding rock load, determine the second influencing factor for the evaluation of hydration degree based on the first influencing parameter, and determine the third influencing factor for the evaluation of hydration degree based on the second influencing parameter.

[0054] Step S3: Correct the comprehensive correction coefficient of hydration heat release rate according to the first influence factor, the second influence factor and the third influence factor, and calculate the degree of hydration of tunnel lining concrete according to the corrected comprehensive correction coefficient of hydration heat release rate.

[0055] In step S1 above, the device acquires a first parameter on the influence of surrounding rock load and temperature on the heat release of cement mineral hydration, and a second parameter on the influence of humidity on the heat release of cement mineral hydration. The device can be a computer device that performs this method. It should be noted that the acquisition and analysis of data involved in this embodiment of the invention are authorized by the user. The surrounding rock load, denoted as P, can be obtained through on-site monitoring.

[0056] The primary parameter affecting the heat of hydration of cement mineral components is denoted as: Temperatures above 20℃ promote the hydration of tunnel lining concrete, while temperatures below 20℃ inhibit its hydration. The distribution curves are shown below. Figure 2 As shown.

[0057] The second parameter affecting the heat release of cement mineral composition hydration is denoted as: Humidity levels below 90% inhibit the hydration of tunnel lining concrete, and its distribution curve is shown in the figure. Figure 3 As shown.

[0058] In step S2 above, the device determines a first influencing factor for evaluating the degree of hydration based on the surrounding rock load, a second influencing factor for evaluating the degree of hydration based on the first influencing parameter, and a third influencing factor for evaluating the degree of hydration based on the second influencing parameter. Determining the first influencing factor for evaluating the degree of hydration based on the surrounding rock load includes:

[0059] Based on the change of the surrounding rock load over time, the change path of the surrounding rock load is obtained; t represents time; f(P,t) represents the change path of the surrounding rock load.

[0060] The negative value of the variation path of the surrounding rock load is used as the power of an exponential function to obtain the first influence factor. The first influence factor K is then calculated according to the following expression. l :

[0061]

[0062] The step of determining the second influencing factor for the hydration degree evaluation based on the first influencing parameter includes:

[0063] The first influence parameter is determined as the second influence factor. The second influence factor K is calculated according to the following expression. t :

[0064]

[0065] The determination of the third influencing factor for the hydration degree evaluation based on the second influencing parameter includes:

[0066] The negative value of the second influencing parameter is used as the power of the exponential function to obtain the numerator;

[0067] The negative value of the preset coefficient is used as the power of the exponential function to obtain the denominator term; the preset coefficient can be set according to the actual situation, and can be selected as 0.4.

[0068] The ratio of the numerator to the denominator is taken as the third influence factor, and the third influence factor K is calculated according to the following expression. h :

[0069]

[0070] In step S3 above, the device corrects the comprehensive correction coefficient for the hydration heat release rate based on the first influence factor, the second influence factor, and the third influence factor, and calculates the degree of hydration of the tunnel lining concrete based on the corrected comprehensive correction coefficient for the hydration heat release rate. The comprehensive correction coefficient for the hydration heat release rate is denoted as θ, and the corrected comprehensive correction coefficient for the hydration heat release rate is denoted as θ′. The correction of the comprehensive correction coefficient for the hydration heat release rate based on the first influence factor, the second influence factor, and the third influence factor includes:

[0071] Multiply the first influence factor, the second influence factor, and the third influence factor by the comprehensive correction coefficient for the hydration heat release rate to obtain the corrected comprehensive correction coefficient for the hydration heat release rate. The corrected comprehensive correction coefficient for the hydration heat release rate is calculated according to the following expression:

[0072] θ′=K l ×K t ×K h ×θ

[0073] The degree of hydration of the tunnel lining concrete is calculated based on the comprehensive correction coefficient of the corrected hydration heat release rate, including:

[0074] Based on the corrected comprehensive correction coefficient for the hydration heat release rate and the baseline heat release rate of each mineral clinker in cement at the initial ambient temperature, the hydration heat release rate of each mineral clinker in cement is calculated; the hydration heat release rate H of each mineral clinker in cement is calculated according to the following expression. i ′:

[0075]

[0076] This represents the baseline heat release rate of each mineral clinker in cement at an initial ambient temperature T0.

[0077] The heat release rate of the hydration system is calculated based on the hydration heat release rate of each mineral clinker in cement and the proportion of each mineral clinker in cement. The heat release rate H of the hydration system is calculated according to the following expression. c ′:

[0078]

[0079] P i It indicates the proportion of each mineral clinker in cement. Different cement mineral clinker compositions are often used to represent various types of cement.

[0080] The degree of hydration of the tunnel lining concrete is calculated based on the heat release rate and the final cumulative heat release of the hydration system. The final cumulative heat release is denoted as Q. max .

[0081] The calculation of the degree of hydration of the tunnel lining concrete based on the heat release rate and the final cumulative heat release of the hydration system includes:

[0082] The cumulative heat release at different times is obtained by integrating the heat release rate of the hydration system over time; the cumulative heat release Q at different times is calculated according to the following expression. t ′:

[0083]

[0084] The ratio of the cumulative heat release at different times to the final cumulative heat release is taken as the degree of hydration of the tunnel lining concrete. The degree of hydration α′ of the tunnel lining concrete is calculated according to the following expression:

[0085]

[0086] The method for evaluating the degree of hydration of tunnel lining concrete provided in this embodiment of the invention is described in detail below:

[0087] A method for evaluating the hydration degree of tunnel lining concrete based on multi-field coupling is established. Technically, it is based on a multi-scale hydration heat release model, which considers the influence of complex loads, load paths, complex temperature and humidity conditions, and temperature and humidity paths on the heat release of multi-component minerals in cement during the construction process of tunnel lining concrete. This method aims to accurately quantify the hydration degree of concrete materials and adopt appropriate and efficient curing methods to reduce the cracking risk and safety risks of the lining.

[0088] Process: Obtain the multi-year average temperature and humidity distribution at the tunnel lining construction site through on-site monitoring → Obtain the magnitude and path of the load on the lining concrete based on the surrounding rock deformation monitoring data → Obtain the concrete mix proportion information → Obtain the mineral composition of the cement → Input the above information such as temperature and humidity, load, concrete mix proportion and cement composition into the multi-scale hydration heat release model, and model, analyze and evaluate the hydration degree, strength development and cracking risk of the lining concrete.

[0089] This invention evaluates concrete mix design factors, construction load factors, and construction environment factors.

[0090] Concrete mix proportion elements:

[0091] The main factor in concrete mix design is the mineral composition of the cement. Common ordinary Portland cement primarily consists of cement clinker—tricalcium silicate (C3S), dicalcium silicate (C2S), tricalcium aluminate (C3A), and tetracalcium aluminoferrite (C4AF). C3S and C2S belong to the silicate family; C3A and C4AF belong to the aluminate family. In cements exhibiting early strength development, C3S and C3A typically constitute a larger proportion; while in low-heat cements, a higher proportion of C2S and C4AF is usually present. The key to cement transforming from a powdery material into a rock-hard solid material and exerting its strength in concrete structures lies in the cement hydration process.

[0092] The multi-component hydration model treats cement particles as single-size spheres with similar mineral composition and uniformly distributed in the hydration system, and utilizes the cumulative heat release Q at different times. t With the final cumulative heat release Q max The ratio represents the degree of hydration α, that is:

[0093]

[0094] In formula (1):

[0095] α – the degree of hydration of the hydration system. It should be noted that the modified parameters in this invention are marked with superscripts, while the unmodified parameters are not marked with superscripts.

[0096] Q max The final cumulative heat release is determined by the inherent properties of the constituent materials and is a constant.

[0097] Q t —The cumulative heat release at different times can be expressed by the heat release rate H of the hydration system. c Integrating over time yields:

[0098] Q t =∫H c dt (2)

[0099] The heat release rate H of the hydration system c It is expressed as the sum of the reaction exothermic rates of cement mineral clinker and chemical admixtures, i.e.:

[0100]

[0101] P i —The proportion of each mineral clinker in cement is often used to represent various types of cement.

[0102] H i—The hydration heat release rate of various cement mineral clinker. It comprehensively considers the influence of many factors, including environmental conditions, chemical admixtures, free water content, and the interactions between cement mineral clinker, namely:

[0103]

[0104] θ — Comprehensive correction coefficient for hydration heat release rate.

[0105] γ i —The hydration heat release rate correction coefficient represents the delaying effect of chemical admixtures and fly ash on the hydration reaction; it is 1 if there are no chemical admixtures or fly ash.

[0106] β i —The hydration heat release rate correction factor indicates the decrease in the hydration heat release rate due to the reduced availability of free water.

[0107] λ i — The hydration heat release rate correction coefficient indicates that the hydration heat release rate is reduced due to the lack of calcium hydroxide in the hydration system.

[0108] μ i —The hydration exothermic rate correction factor represents the interaction between C3S and C2S minerals.

[0109] H i,T0 (Q i — The baseline heat release rate of each mineral clinker in cement at ambient temperature T0.

[0110] E i / R——Thermal activation energy. The thermal activation energy of each component of cement is measured by thermal activation energy experiments.

[0111] T – Current ambient temperature.

[0112] T0 — Initial ambient temperature.

[0113] Construction load elements:

[0114] Due to differences in tunnel burial depth, surrounding rock properties, and environmental conditions, the stress between the surrounding rock and the support system exhibits a slow increasing trend after the lining is applied, and the time required for the contact stress to stabilize also varies. However, overall, the maximum contact stress between the surrounding rock and the lining ranges from 0.5 MPa to 2 MPa. The stress on the lining surface is relatively large, and the lining support system is not only used as a "safety reserve," but also gradually increases the load acting on the lining as the surrounding rock changes.

[0115] In summary, and based on existing research, unlike traditional laboratory standard curing conditions, lining concrete undergoes a typical load path immediately after pouring. This invention introduces the surrounding rock load influence parameter K into the traditional model for evaluating cement hydration. l This is to reflect the influence of complex loads and their paths on the heat release of various mineral components in the cement of tunnel lining concrete. l Calculated from equation (5):

[0116] K l =e -f(P,t) (5)

[0117] Where P represents the magnitude of the surrounding rock load obtained from on-site monitoring; t represents time; and f(P,t) represents the path of change of the surrounding rock load.

[0118] Construction environment factors:

[0119] Furthermore, unlike traditional laboratory standard curing conditions, the lining concrete undergoes a typical temperature and humidity pathway immediately after pouring. The location of the underground tunnel structure exposes it to asymmetrical environmental conditions for extended periods, leading to significant variations in the hydration level of the concrete. The substantial difference in temperature and humidity between the tunnel interior and exterior creates temperature and humidity gradients within the tunnel lining structure. The magnitude and pathway of these temperature and humidity levels collectively influence the heat release of the cement minerals.

[0120] Therefore, the influence of temperature and humidity on the parameter K is introduced. t and K h This is to reflect the effect of temperature and humidity gradients on the heat release of various mineral components in cement. t and K h Calculated from equation (6):

[0121]

[0122] in, The effect of temperature on the heat release of cement mineral components during hydration is shown. Temperatures above 20℃ promote the hydration of tunnel lining concrete, while temperatures below 20℃ inhibit its hydration. This represents the effect of humidity on the heat release from the hydration of cement mineral components; humidity less than 90% inhibits the degree of hydration of tunnel lining concrete.

[0123] Finally, by considering the combined effects of load and ambient temperature and humidity on the hydration degree of tunnel lining concrete, an evaluation index α′ for the hydration degree of tunnel lining concrete based on multi-field coupling was obtained.

[0124]

[0125] In a certain tunnel concrete project, the multi-year average temperature and humidity distribution at the site is as follows: Figure 4 As shown. One curve is sinusoidal, representing the temperature curve; the other is the humidity curve.

[0126] Based on the on-site surrounding rock deformation monitoring data, the magnitude and path of the load on the lining concrete were obtained as follows: Figure 5 As shown.

[0127] The cement materials with the components shown in Table 1 were used during construction:

[0128] Table 1

[0129]

[0130] Through hydration heat release experiments, the final cumulative heat release Q of the cement at T0 = 20℃ and 100% humidity was measured. max The final cumulative heat release of C3A is 860 kJ / kg, that of C4AF is 435 kJ / kg, that of C3S is 460 kJ / kg, and that of C2S is 280 kJ / kg.

[0131] Will Figure 4 and Figure 5 The relevant monitoring data of ambient temperature and humidity, load magnitude and path were input into the modified model for modeling and calculation. Taking the hydration degree calculation on the 7th day as an example, the heat release of each mineral component of cement on the 7th day was calculated by establishing a multi-scale model as follows: the cumulative heat release of C3A on the 7th day was 351 kJ / kg, the cumulative heat release of C4AF on the 7th day was 145 kJ / kg, the cumulative heat release of C3S on the 7th day was 189 kJ / kg, and the cumulative heat release of C2S on the 7th day was 88 kJ / kg.

[0132] The calculation process for α′ is as follows:

[0133]

[0134] The calculation process for the degree of hydration α using traditional methods is as follows:

[0135]

[0136] In summary, using traditional calculation methods to determine the hydration degree of tunnel lining concrete can lead to an overestimation of concrete strength, resulting in inadequate curing measures, insufficient load-bearing capacity of the lining structure, increased cracking, and heightened safety risks. However, the method for assessing the hydration degree of lining concrete under multi-field coupling conditions comprehensively considers external loads and environmental factors, providing a more accurate prediction of the hydration degree. For example, appropriately increasing temperature and humidity during curing can accelerate the hydration of tunnel lining concrete, providing a basis for adopting reasonable and efficient curing methods and reducing the risk of cracking and safety risks to the lining.

[0137] The method for evaluating the hydration degree of tunnel lining concrete provided in this invention has the following beneficial technical effects:

[0138] 1. The differences between the early-age hydration process of tunnel lining concrete and laboratory conditions were considered. The influence of the magnitude and path of the surrounding rock load and the magnitude of temperature and humidity on the degree of hydration of tunnel lining concrete was added, and the degree of hydration of tunnel lining concrete can be accurately and conveniently evaluated.

[0139] 2. A more precise grasp of the cement hydration level and concrete performance development. Based on actual environmental and load conditions, more reasonable curing conditions are applied through simulation, ensuring the quality of the lining concrete and reducing cracking and safety risks.

[0140] 3. The method for evaluating the hydration degree of tunnel lining based on multi-field coupling makes extensive use of monitoring data from the tunnel construction site, improves the data utilization rate, and increases the applicability of the invention.

[0141] 4. Determining the degree of hydration of the tunnel lining concrete can better guide the construction of the tunnel lining and achieve the goal of building a high-quality tunnel project with fewer cracks.

[0142] The method for evaluating the hydration degree of tunnel lining concrete provided in this invention obtains a first influence parameter of surrounding rock load and temperature on the heat release of cement mineral components during hydration, and a second influence parameter of humidity on the heat release of cement mineral components during hydration. Based on the surrounding rock load, a first influence factor for evaluating the hydration degree is determined; based on the first influence parameter, a second influence factor for evaluating the hydration degree is determined; and based on the second influence parameter, a third influence factor for evaluating the hydration degree is determined. A comprehensive correction coefficient for the hydration heat release rate is then applied based on the first, second, and third influence factors, and the hydration degree of the tunnel lining concrete is calculated based on the corrected comprehensive correction coefficient for the hydration heat release rate. This method can accurately evaluate the hydration degree of tunnel lining concrete.

[0143] Furthermore, the first influencing factor for determining the hydration degree evaluation based on the surrounding rock load includes:

[0144] The path of change of the surrounding rock load is obtained based on the change of the surrounding rock load over time; this can be referred to the above embodiments for explanation, and will not be repeated here.

[0145] The negative value of the variation path of the surrounding rock load is used as the power of an exponential function to obtain the first influence factor. This can be referred to the above embodiment for explanation, and will not be repeated here.

[0146] Further, determining the second influencing factor for the hydration degree evaluation based on the first influencing parameter includes:

[0147] The first influencing parameter is determined as the second influencing factor. This can be referred to the above embodiments for further explanation, and will not be repeated here.

[0148] Furthermore, determining the third influencing factor for the hydration degree evaluation based on the second influencing parameter includes:

[0149] The negative value of the second influencing parameter is used as the power of the exponential function to obtain the numerator; this can be explained with reference to the above embodiments, and will not be repeated here.

[0150] The negative value of the preset coefficient is used as the power of the exponential function to obtain the denominator term; the above embodiment can be referred to for explanation, and will not be repeated here.

[0151] The ratio of the numerator to the denominator is used as the third influencing factor. This can be explained with reference to the above embodiments, and will not be repeated here.

[0152] Further, the step of correcting the comprehensive correction coefficient for the hydration heat release rate based on the first influence factor, the second influence factor, and the third influence factor includes:

[0153] The first influence factor, the second influence factor, and the third influence factor are multiplied by the comprehensive correction coefficient for the hydration heat release rate to obtain the corrected comprehensive correction coefficient for the hydration heat release rate. This can be referred to the above embodiments for explanation, and will not be repeated here.

[0154] Furthermore, the calculation of the hydration degree of the tunnel lining concrete based on the corrected hydration heat release rate comprehensive correction coefficient includes:

[0155] The hydration heat release rate of each mineral clinker in cement is calculated based on the comprehensive correction coefficient of the corrected hydration heat release rate and the reference heat release rate of each mineral clinker in cement at the initial ambient temperature; the above embodiments can be referred to for explanation, and will not be repeated here.

[0156] The heat release rate of the hydration system is calculated based on the hydration heat release rate of each mineral clinker in cement and the proportion of each mineral clinker in cement; the above examples can be referred to for explanation, and will not be repeated here.

[0157] The degree of hydration of the tunnel lining concrete is calculated based on the heat release rate and the final cumulative heat release of the hydration system. This can be referred to the above embodiments for further explanation and will not be repeated here.

[0158] Further, the calculation of the degree of hydration of the tunnel lining concrete based on the heat release rate and the final cumulative heat release of the hydration system includes:

[0159] The cumulative heat release at different times is obtained by integrating the heat release rate of the hydration system over time; this can be referred to the above embodiments for explanation, and will not be repeated here.

[0160] The ratio of the cumulative heat release at different times to the final cumulative heat release is used as the degree of hydration of the tunnel lining concrete. This can be referred to the above embodiments for explanation, and will not be repeated here.

[0161] Figure 6 This is a schematic diagram of the structure of a device for evaluating the hydration degree of tunnel lining concrete according to an embodiment of the present invention, as shown below. Figure 6 As shown, the tunnel lining concrete hydration degree evaluation device provided in this embodiment of the invention includes an acquisition unit 601, a determination unit 602, and an evaluation unit 603, wherein:

[0162] The acquisition unit 601 is used to acquire the first influence parameter of the surrounding rock load and temperature on the hydration heat release of cement mineral components and the second influence parameter of humidity on the hydration heat release of cement mineral components; the determination unit 602 is used to determine the first influence factor for the hydration degree evaluation based on the surrounding rock load, the second influence factor for the hydration degree evaluation based on the first influence parameter, and the third influence factor for the hydration degree evaluation based on the second influence parameter; the evaluation unit 603 is used to correct the comprehensive correction coefficient of the hydration heat release rate based on the first influence factor, the second influence factor, and the third influence factor, and calculate the hydration degree of the tunnel lining concrete based on the corrected comprehensive correction coefficient of the hydration heat release rate.

[0163] Specifically, the acquisition unit 601 in the device is used to acquire the first influence parameter of the surrounding rock load and temperature on the hydration heat release of cement mineral components and the second influence parameter of humidity on the hydration heat release of cement mineral components; the determination unit 602 is used to determine the first influence factor for evaluating the degree of hydration based on the surrounding rock load, the second influence factor for evaluating the degree of hydration based on the first influence parameter, and the third influence factor for evaluating the degree of hydration based on the second influence parameter; the evaluation unit 603 is used to correct the comprehensive correction coefficient of the hydration heat release rate based on the first influence factor, the second influence factor, and the third influence factor, and calculate the degree of hydration of the tunnel lining concrete based on the corrected comprehensive correction coefficient of the hydration heat release rate.

[0164] The hydration degree evaluation device for tunnel lining concrete provided in this embodiment of the invention acquires a first influence parameter of surrounding rock load and temperature on the hydration heat release of cement mineral components and a second influence parameter of humidity on the hydration heat release of cement mineral components; determines a first influence factor for hydration degree evaluation based on the surrounding rock load, a second influence factor for hydration degree evaluation based on the first influence parameter, and a third influence factor for hydration degree evaluation based on the second influence parameter; corrects the comprehensive correction coefficient of hydration heat release rate based on the first influence factor, the second influence factor, and the third influence factor, and calculates the hydration degree of tunnel lining concrete based on the corrected comprehensive correction coefficient of hydration heat release rate, thus accurately evaluating the hydration degree of tunnel lining concrete.

[0165] The embodiment of the invention provides a device for evaluating the hydration degree of tunnel lining concrete, which can be used to execute the processing flow of the above-described method embodiments. Its function will not be repeated here, but can be referred to the detailed description of the above-described method embodiments.

[0166] Figure 7 This is a schematic diagram of the physical structure of an electronic device provided in an embodiment of the present invention, such as... Figure 7 As shown, the electronic device includes: a processor 701, a memory 702, and a bus 703;

[0167] The processor 701 and the memory 702 communicate with each other via the bus 703.

[0168] The processor 701 is used to call program instructions in the memory 702 to execute the methods provided in the above-described method embodiments, including, for example:

[0169] Obtain the first influence parameter of surrounding rock load and temperature on the heat release of cement mineral components hydration, and the second influence parameter of humidity on the heat release of cement mineral components hydration.

[0170] The first influencing factor for the evaluation of the degree of hydration is determined based on the surrounding rock load; the second influencing factor for the evaluation of the degree of hydration is determined based on the first influencing parameter; and the third influencing factor for the evaluation of the degree of hydration is determined based on the second influencing parameter.

[0171] The comprehensive correction coefficient for the hydration heat release rate is corrected based on the first influence factor, the second influence factor, and the third influence factor, and the degree of hydration of the tunnel lining concrete is calculated based on the corrected comprehensive correction coefficient for the hydration heat release rate.

[0172] This embodiment discloses a computer program product, which includes a computer program stored on a non-transitory computer-readable storage medium. The computer program includes program instructions, and when the program instructions are executed by a computer, the computer can perform the methods provided in the above-described method embodiments, such as:

[0173] Obtain the first influence parameter of surrounding rock load and temperature on the heat release of cement mineral components hydration, and the second influence parameter of humidity on the heat release of cement mineral components hydration.

[0174] The first influencing factor for the evaluation of the degree of hydration is determined based on the surrounding rock load; the second influencing factor for the evaluation of the degree of hydration is determined based on the first influencing parameter; and the third influencing factor for the evaluation of the degree of hydration is determined based on the second influencing parameter.

[0175] The comprehensive correction coefficient for the hydration heat release rate is corrected based on the first influence factor, the second influence factor, and the third influence factor, and the degree of hydration of the tunnel lining concrete is calculated based on the corrected comprehensive correction coefficient for the hydration heat release rate.

[0176] This embodiment provides a computer-readable storage medium storing a computer program that causes the computer to execute the methods provided in the above-described method embodiments, including, for example:

[0177] Obtain the first influence parameter of surrounding rock load and temperature on the heat release of cement mineral components hydration, and the second influence parameter of humidity on the heat release of cement mineral components hydration.

[0178] The first influencing factor for the evaluation of the degree of hydration is determined based on the surrounding rock load; the second influencing factor for the evaluation of the degree of hydration is determined based on the first influencing parameter; and the third influencing factor for the evaluation of the degree of hydration is determined based on the second influencing parameter.

[0179] The comprehensive correction coefficient for the hydration heat release rate is corrected based on the first influence factor, the second influence factor, and the third influence factor, and the degree of hydration of the tunnel lining concrete is calculated based on the corrected comprehensive correction coefficient for the hydration heat release rate.

[0180] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0181] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0182] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0183] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0184] In the description of this specification, the references to terms such as "an embodiment," "a specific embodiment," "some embodiments," "for example," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0185] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for evaluating the hydration degree of tunnel lining concrete, characterized in that, include: Obtain the first influence parameter of surrounding rock load and temperature on the heat release of cement mineral components hydration, and the second influence parameter of humidity on the heat release of cement mineral components hydration. The first influencing factor for the evaluation of the degree of hydration is determined based on the surrounding rock load; the second influencing factor for the evaluation of the degree of hydration is determined based on the first influencing parameter; and the third influencing factor for the evaluation of the degree of hydration is determined based on the second influencing parameter. The comprehensive correction coefficient for the hydration heat release rate is corrected based on the first influence factor, the second influence factor, and the third influence factor, and the degree of hydration of the tunnel lining concrete is calculated based on the corrected comprehensive correction coefficient for the hydration heat release rate. The first influencing factor for determining the hydration degree evaluation based on the surrounding rock load includes: Based on the change of the surrounding rock load over time, the change path of the surrounding rock load is obtained; The negative value of the variation path of the surrounding rock load is taken as the power of the natural exponential function to obtain the first influence factor. The step of determining the second influencing factor for the hydration degree evaluation based on the first influencing parameter includes: The first influence parameter is determined as the second influence factor; The determination of the third influencing factor for the hydration degree evaluation based on the second influencing parameter includes: The negative value of the second influencing parameter is used as the power of the natural exponential function to obtain the numerator; The negative values ​​of the preset coefficients are used as the powers of the natural exponential function to obtain the denominator term; The ratio of the numerator to the denominator is used as the third influencing factor.

2. The method of evaluating the hydration degree of tunnel lining concrete according to claim 1, characterized by, The step of correcting the comprehensive correction coefficient for the hydration heat release rate based on the first influence factor, the second influence factor, and the third influence factor includes: Multiply the first influence factor, the second influence factor, and the third influence factor by the comprehensive correction coefficient of the hydration heat release rate to obtain the corrected comprehensive correction coefficient of the hydration heat release rate.

3. The method of evaluating the hydration degree of tunnel lining concrete according to claim 1 or 2, characterized in that, The degree of hydration of the tunnel lining concrete is calculated based on the comprehensive correction coefficient of the corrected hydration heat release rate, including: The hydration heat release rate of each mineral clinker in cement is calculated based on the comprehensive correction coefficient of the corrected hydration heat release rate and the reference heat release rate of each mineral clinker in cement at the initial ambient temperature. The heat release rate of the hydration system is calculated based on the hydration heat release rate of each mineral clinker in cement and the proportion of each mineral clinker in cement. The degree of hydration of the tunnel lining concrete is calculated based on the heat release rate and the final cumulative heat release of the hydration system.

4. The method of evaluating the hydration degree of tunnel lining concrete according to claim 3, characterized by, The calculation of the degree of hydration of the tunnel lining concrete based on the heat release rate and the final cumulative heat release of the hydration system includes: By integrating the heat release rate of the hydration system over time, the cumulative heat release at different times can be obtained; The ratio of the cumulative heat release at different times to the final cumulative heat release is used as the degree of hydration of the tunnel lining concrete.

5. A device for evaluating the hydration degree of tunnel lining concrete, characterized in that, include: The acquisition unit is used to acquire the first influence parameters of surrounding rock load and temperature on the heat release of cement mineral components hydration and the second influence parameters of humidity on the heat release of cement mineral components hydration. The determining unit is used to determine a first influencing factor for the evaluation of the degree of hydration based on the surrounding rock load, a second influencing factor for the evaluation of the degree of hydration based on the first influencing parameter, and a third influencing factor for the evaluation of the degree of hydration based on the second influencing parameter. The evaluation unit is used to correct the comprehensive correction coefficient of hydration heat release rate according to the first influence factor, the second influence factor and the third influence factor, and to calculate the degree of hydration of tunnel lining concrete according to the corrected comprehensive correction coefficient of hydration heat release rate. The first influencing factor for determining the hydration degree evaluation based on the surrounding rock load includes: Based on the change of the surrounding rock load over time, the change path of the surrounding rock load is obtained; The negative value of the variation path of the surrounding rock load is taken as the power of the natural exponential function to obtain the first influence factor. The step of determining the second influencing factor for the hydration degree evaluation based on the first influencing parameter includes: The first influence parameter is determined as the second influence factor; The determination of the third influencing factor for the hydration degree evaluation based on the second influencing parameter includes: The negative value of the second influencing parameter is used as the power of the natural exponential function to obtain the numerator; The negative values ​​of the preset coefficients are used as the powers of the natural exponential function to obtain the denominator term; The ratio of the numerator to the denominator is used as the third influencing factor.

6. An electronic device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 4.

7. A computer-readable storage medium having stored thereon a computer program, characterized in that When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 4.

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