CN-120430184-B - Box culvert performance optimization method and system based on concrete doping amount control

CN120430184BCN 120430184 BCN120430184 BCN 120430184BCN-120430184-B

Abstract

The invention provides a box culvert performance optimization method and system based on concrete doping amount control, and relates to the technical field of doping material proportion optimization, wherein the method comprises the steps of analyzing the structural length characteristics of a long and large frame box culvert; performing relevance analysis on concrete doping materials according to box culvert performance parameters, establishing a performance-doping material relevance list, performing matching search according to preset performance parameter quantity scalar quantity to obtain a performance matching doping scheme, performing length temperature stress accumulation analysis, performing crack prediction according to temperature stress gradients to obtain temperature gradient crack distribution, performing doping quantity and pouring process dimension compensation optimization to obtain optimized concrete doping quantity, and performing concrete doping pouring control. The invention solves the technical problems that the use of the concrete doping amount in the prior art mainly depends on experience or general standards, and the technical problem that the risk of crack generation is increased due to the lack of personalized proportioning design aiming at the temperature stress characteristics of different areas of the long and large frame box culvert of the concrete.

Inventors

WANG QIANG
XIE YONG
JIA XIAOHUI
WANG DELONG
CHEN FENG
LI HAIBING
GUO PENG
ZHANG ZHEN

Assignees

中铁二十五局集团第二工程有限公司

Dates

Publication Date: 20260508
Application Date: 20250506

Claims (7)

1. The box culvert performance optimization method based on concrete doping amount control is characterized by comprising the following steps of: analyzing the structural length characteristics of the long and large frame box culvert; Carrying out relevance analysis on concrete doping materials according to box culvert performance parameters, and establishing a performance-doping material relevance list; performing matching search on the performance-doping material association list according to a preset performance parameter number scalar of the long frame box culvert to obtain a performance matching doping scheme; based on the performance matching doping scheme, length temperature stress accumulation analysis is carried out according to structural length characteristics, crack prediction is carried out according to temperature stress gradients, and temperature gradient crack distribution is obtained; According to the temperature gradient crack distribution and the temperature stress gradient, carrying out doping amount and pouring process dimension compensation optimization on the performance matching doping scheme to obtain optimized concrete doping amount, wherein the optimized concrete doping amount is used for carrying out concrete doping pouring control; acquiring the length and the structural characteristics of a long and large frame box culvert; carrying out mechanical response analysis according to the length dimension and the structural characteristics to obtain stress characteristics of each length distribution of the long and large frame box culvert, and obtaining the structural length characteristics; performing relevance analysis on concrete doping materials according to box culvert performance parameters, and establishing a performance-doping material relevance list, wherein the method comprises the following steps: Obtaining the category and the name of the concrete doping material; respectively carrying out directional regulation and control on the concrete doping materials according to the box culvert performance parameters to obtain the association relation between each type of doping materials and each box culvert performance parameter; Integrating the association relation between all kinds of doping materials and the box culvert performance parameters according to the box culvert performance parameters, and constructing the performance-doping material association list; Based on the performance matching doping scheme, length temperature stress accumulation analysis is performed according to structural length characteristics, crack prediction is performed according to temperature stress gradient, and temperature gradient crack distribution is obtained, including: carrying out hydration heat analysis according to the performance matching doping scheme and a concrete hydration heat release rule to obtain a hydration heat temperature; performing temperature accumulation calculation according to the hydration heat temperature, and performing temperature difference calculation according to the length of the long and large frame to obtain temperature gradient distribution; positioning and aligning the hydration heat temperature distribution with the external temperature of each long and large frame to construct a temperature cloud picture, wherein the temperature cloud picture comprises temperature distribution, temperature gradient in the length direction and temperature gradient distribution in the wall thickness direction; according to the temperature cloud picture, temperature-tension conversion is carried out on temperature by utilizing a temperature-tension relation, so that temperature stress distribution in the long and large frame is obtained; and carrying out fusion analysis according to the temperature stress distribution and the structural length characteristics, carrying out crack prediction on the long and large frame box culvert, and generating the temperature gradient crack distribution according to the crack prediction probability.
2. The method for optimizing box culvert performance based on concrete doping amount control of claim 1, wherein the box culvert performance parameters comprise compressive strength, tensile strength, elastic modulus, impermeability and durability.
3. The box culvert performance optimization method based on concrete doping amount control of claim 1, comprising the following steps: configuring a plurality of groups of experimental combinations based on the types of concrete doping materials; Performing adiabatic temperature rise experiments on the plurality of groups of experimental combinations respectively, and analyzing the concrete hydration heat release law; Based on the concrete hydration heat release law and in combination with the external environment temperature, the temperature field and stress field coupling experimental analysis is carried out, and the temperature-stress tension relation is established.
4. The method for optimizing box culvert performance based on concrete doping amount control of claim 3, wherein configuring a plurality of groups of experimental combinations based on the category of concrete doping material comprises: Different doping gradients are configured for each type of concrete doping material, and a plurality of groups of doping experimental combinations of each type are constructed; Based on the multi-group doping amount experimental combinations of each class, configuring class doping materials with different lengths according to the material lengths of each class, and constructing multi-group length experimental combinations of multiple classes; And combining and integrating the multi-group doping amount experimental combinations of each category with the multi-group length experimental combinations of the multi-category to obtain the multi-group experimental combinations.
5. The method for optimizing the box culvert performance based on the concrete doping amount control of claim 1, wherein the performance matching doping scheme is subjected to doping amount and pouring process dimension compensation optimization according to the temperature gradient crack distribution and the temperature stress gradient, so as to obtain the optimized concrete doping amount, and the method comprises the following steps: identifying a high-temperature gradient region and a low-temperature gradient region in which the crack distribution probability reaches a threshold region according to the temperature gradient crack distribution and the temperature stress gradient; and carrying out dopant temperature compensation on the high-temperature gradient region and the low-temperature gradient region according to the temperature-stress relation of the dopant, wherein the dopant temperature compensation comprises dopant proportion and/or dopant material length compensation.
6. The method for optimizing box culvert performance based on concrete doping amount control of claim 5, wherein the performance matching doping scheme is subjected to doping amount and pouring process dimension compensation optimization to obtain an optimized concrete doping amount, and the method further comprises the steps of: identifying nodes with crack probability reaching a threshold value from the temperature gradient crack distribution; dividing the length of the long frame box culvert according to the positioning of the nodes to obtain a dividing section; And carrying out partition time-sharing irrigation on the partition intervals, and determining a temperature compensation quantity to optimize a temperature stress gradient based on hydration heat temperature accumulation fitting of the partition time-sharing irrigation to obtain an optimized pouring process scheme.
7. A culvert performance optimization system based on concrete doping amount control, characterized in that it is used for implementing the method for optimizing the culvert performance based on concrete doping amount control according to any one of claims 1 to 6, said system comprising: the length characteristic analysis module is used for analyzing the structural length characteristics of the long and large frame box culvert; the relevance analysis module is used for carrying out relevance analysis on the concrete doping materials according to the box culvert performance parameters and establishing a performance-doping material relevance list; The matching search module is used for carrying out matching search on the performance-doping material association list according to the preset performance parameter quantity of the long frame box culvert to obtain a performance matching doping scheme; The crack prediction module is used for carrying out length temperature stress accumulation analysis according to the structural length characteristics based on the performance matching doping scheme, and carrying out crack prediction according to the temperature stress gradient to obtain temperature gradient crack distribution; The pouring control module is used for carrying out compensation optimization on the doping amount and the pouring process dimension of the performance matching doping scheme according to the temperature gradient crack distribution and the temperature stress gradient to obtain an optimized concrete doping amount, and the optimized concrete doping amount is used for carrying out concrete doping pouring control; the method comprises the steps of obtaining the length dimension and the structural characteristic of a long and large frame box culvert, carrying out mechanical response analysis according to the length dimension and the structural characteristic to obtain stress characteristics of each length distribution of the long and large frame box culvert, and obtaining the structural length characteristics; The method comprises the steps of obtaining the types and names of concrete doping materials, respectively carrying out directional regulation and control on the concrete doping materials according to the box culvert performance parameters to obtain the association relation between each type of doping materials and each box culvert performance parameter, integrating the association relation between all types of doping materials and the box culvert performance parameters according to the box culvert performance parameters, and constructing the performance-doping material association list; According to the performance matching doping scheme and the concrete hydration heat release rule, hydration heat analysis is carried out to obtain hydration heat temperature, temperature accumulation calculation is carried out according to the hydration heat temperature, temperature difference calculation is carried out according to the length of a long frame to obtain temperature gradient distribution, the hydration heat temperature distribution is aligned with the external temperature of each long frame, a temperature cloud picture is constructed, the temperature cloud picture comprises temperature distribution, temperature gradient in the length direction and temperature gradient in the wall thickness direction, temperature stress is converted according to the temperature cloud picture by utilizing a temperature-stress relation, temperature stress distribution in the long frame is obtained, fusion analysis is carried out according to the temperature stress distribution and the structural length characteristic, crack prediction is carried out on a long frame box culvert, and the temperature gradient crack distribution is generated according to the crack prediction probability.

Description

Box culvert performance optimization method and system based on concrete doping amount control Technical Field The invention relates to the technical field of doping material proportion optimization, in particular to a box culvert performance optimization method and system based on concrete doping amount control. Background Concrete is used as a main building material, and is widely applied to various infrastructure constructions due to excellent strength, durability and construction convenience, however, as the scale of the structure is continuously increased, the traditional concrete pouring and construction process faces a series of technical problems, particularly in the aspects of temperature stress and crack control, particularly for large-volume concrete structures such as long and large frame box culverts. In the construction process of large-volume concrete, the temperature is obviously increased due to the heat release of hydration reaction in the concrete, the temperature gradient is often generated due to the temperature difference between the interior and the surface of the concrete, the temperature gradient is more obvious due to the temperature difference, especially in a longer structure, the temperature gradient difference is more obvious, under the condition, the accumulation of temperature stress is extremely easy to cause the generation of penetrability cracks, the problem is particularly prominent in the construction of large-volume concrete such as long-sized frame box culverts, the long-sized frame box culverts are long in size, the shrinkage of the concrete can occur in the hardening process, the shrinkage of the concrete possibly does not show obvious cracks at the initial stage, but gradually accumulates along with the time, the concrete generates tensile stress, and finally the crack is generated, so the shrinkage problem is not effectively controlled in the traditional construction process. Disclosure of Invention The application provides a box culvert performance optimization method and system based on concrete doping amount control, and aims to solve the technical problems that the use of concrete doping amount in the prior art mainly depends on experience or general standards, and the temperature stress characteristics of different areas of a box culvert of a concrete long and large frame are lack of personalized proportioning design, so that the risk of crack generation is increased. The first aspect of the application provides a box culvert performance optimization method based on concrete doping amount control, which comprises the steps of analyzing the structural length characteristics of a long and large frame box culvert; performing relevance analysis on concrete doping materials according to box culvert performance parameters to establish a performance-doping material relevance list, performing matching search on the performance-doping material relevance list according to a preset performance parameter quantity scalar of a long and large frame box culvert to obtain a performance matching doping scheme, performing length temperature stress accumulation analysis according to structural length characteristics based on the performance matching doping scheme, performing crack prediction according to temperature stress gradients to obtain temperature gradient crack distribution, performing doping quantity and pouring process dimension compensation optimization on the performance matching doping scheme according to the temperature gradient crack distribution and the temperature stress gradients to obtain optimized concrete doping quantity, wherein the optimized concrete doping quantity is used for performing concrete doping pouring control. The system comprises a length characteristic analysis module, a relevance analysis module, a matching search module, a crack prediction module and a pouring control module, wherein the length characteristic analysis module is used for analyzing structural length characteristics of a long and large frame culvert, the relevance analysis module is used for carrying out relevance analysis on concrete doping materials according to box culvert performance parameters, establishing a performance-doping material relevance list, the matching search module is used for carrying out matching search on the performance-doping material relevance list according to a preset performance parameter quantity scalar of the long and large frame culvert to obtain a performance matching doping scheme, the crack prediction module is used for carrying out length temperature stress accumulation analysis according to the structural length characteristics based on the performance matching doping scheme, carrying out crack prediction according to temperature stress gradients to obtain temperature gradient crack distribution, and the pouring control module is used for carrying out doping quantity and pouring process dimension compensation optimization on the performance ma