CN-121980791-A - Brick fetal membrane optimization method and system

CN121980791ACN 121980791 ACN121980791 ACN 121980791ACN-121980791-A

Abstract

The invention relates to the technical field of constructional engineering and discloses a brick bed-jig optimization method and a system, wherein the method comprises the steps of acquiring active soil pressure, pore water pressure, construction additional load, lateral accumulated displacement, material performance parameters, system temperature change and environmental vibration acceleration of the back of a brick bed-jig in real time; based on the multi-source data, the comprehensive load coefficient, the displacement state coefficient, the material performance coefficient and the model-actually measured displacement matching degree are calculated in sequence, and finally, the creep rate and the reference axial force are combined, the real-time axial force of the target support point is calculated dynamically, and the current axial force is adjusted to the target value in a self-adaptive mode. The system correspondingly comprises a comprehensive load evaluation, a displacement state evaluation, a material performance evaluation, a model-actual measurement displacement matching evaluation and an axial force self-adaptive adjustment module. The invention realizes the transition from static design to dynamic perception and active control of the brick bed-jig support, and remarkably improves the construction safety and economy.

Inventors

LI SHIYU
LEI XUN
NI JINSONG
HE MEIZHI
LU JIANG
WU WEI
YU WEI
OU YONG

Assignees

湖南东方红建设集团有限公司

Dates

Publication Date: 20260505
Application Date: 20260123

Claims (8)

1. A method of optimizing a tile tire, comprising: calculating and obtaining a comprehensive load coefficient based on active soil pressure at the back of the brick bed-jig, soil body pore water pressure after the bed-jig and additional load of construction of adjacent areas; calculating and obtaining a displacement state coefficient based on lateral accumulated displacement of the fetal membranes; calculating and obtaining a material performance coefficient based on the elastic modulus of the brick molding bed brick masonry, the deformation modulus of the brick molding bed and the water content of the material; calculating and obtaining a model-actual measurement displacement matching degree based on the comprehensive load coefficient, the displacement state coefficient, the material performance coefficient, the tire membrane-supporting system temperature change and the environmental vibration acceleration; And calculating and obtaining the real-time axial force of the target brick fetal membrane supporting point based on the model-actually measured displacement matching degree, the creep rate and the reference axial force, and adjusting the real-time axial force of the current brick fetal membrane supporting point to the real-time axial force of the target brick fetal membrane supporting point.
2. The method for optimizing a brick fetal membrane according to claim 1, wherein the step of calculating and acquiring the real-time axial force of the target brick fetal membrane support point comprises the following steps: Obtaining a model-actually measured displacement matching degree, creep rate and reference axial force; Performing ratio processing on the current creep rate and the designed allowable creep rate, and acquiring a creep influence index after adopting a min function limiting ratio upper limit to be 1; and based on the model-actually measured displacement matching degree and the creep influence index, respectively carrying out cooperative proportion adjustment and creep effect proportion adjustment on the reference axial force, and multiplying the results of the two adjustment to obtain the real-time axial force of the target brick fetal membrane supporting point.
3. The method for optimizing a brick fetal membrane according to claim 2, wherein the step of calculating the obtained model-measured displacement matching degree is: acquiring a comprehensive load coefficient, a displacement state coefficient, a material performance coefficient, a tire membrane-supporting system temperature change and an environmental vibration acceleration; based on the temperature change of the fetal membrane-supporting system, combining a preset temperature change threshold value and a maximum allowable temperature change, and normalizing the temperature change threshold value and the maximum allowable temperature change into a temperature change index through a piecewise linear function; performing ratio processing on the current environmental vibration acceleration and the maximum allowable vibration acceleration, and acquiring an environmental vibration acceleration index after adopting a min function limiting ratio upper limit to be 1; Calculating and obtaining a predicted displacement coefficient based on the comprehensive load coefficient, the material performance coefficient, the temperature change index and the environmental vibration acceleration index; Calculating model-measured displacement matching degree through an exponential decay function based on the difference between the displacement state coefficient and the predicted displacement coefficient, wherein the model-measured displacement matching degree decays exponentially with the increase of the difference between the displacement state coefficient and the predicted displacement coefficient.
4. A method of optimizing a tile tire membrane according to claim 3, wherein the step of calculating a predicted displacement coefficient comprises: calculating a load-material displacement term based on the comprehensive load coefficient and the material performance coefficient; Taking the temperature change index and the environmental vibration acceleration index as two independent environmental displacement items; Dynamically distributing weights of the load-material displacement item and two independent environment displacement items according to the real-time magnitude of the temperature change index and the environment vibration acceleration index; And summing the weighted terms to obtain the predicted displacement coefficient.
5. A method of optimizing a tile tire membrane according to claim 3, wherein the step of calculating the resulting load factor comprises: acquiring active soil pressure at the back of a brick bed-jig, soil body pore water pressure after the bed-jig and additional load of construction in adjacent areas; Respectively carrying out ratio processing on the active soil pressure at the back of the tire membrane of the current brick, the pore water pressure of the soil body after the tire membrane and the construction additional load of the adjacent area with the design allowable maximum value of the current brick, and acquiring a soil pressure index, a pore water pressure index and an additional load index after adopting a min function limiting ratio upper limit as 1; and respectively carrying out weighted square treatment on the soil pressure index, the pore water pressure index and the additional load index, and then carrying out square operation on the weighted square sum to obtain the comprehensive load coefficient.
6. A method of optimizing a tile tire membrane according to claim 3, wherein the step of calculating the coefficient of displacement state is: acquiring the lateral accumulated displacement of the current fetal membrane; Based on the ratio of the lateral accumulated displacement of the fetal membranes to the maximum displacement allowed by the design, calculating to obtain a displacement state coefficient with a value ranging from 0 to 1 through the complementary form of an exponential decay function, wherein the coefficient value increases in a nonlinear way along with the increase of the accumulated displacement.
7. A method of optimizing a tile tire membrane according to claim 3, wherein the step of obtaining a coefficient of performance of the material comprises: Obtaining the elastic modulus of the brick molding bed brick masonry, the deformation modulus of the brick molding bed and the water content of the material; respectively carrying out ratio treatment on the elastic modulus of the brick masonry of the brick bed-jig and the deformation modulus of the brick bed-jig with the design standard value, and obtaining the elastic modulus index of the brick masonry and the deformation modulus index of the brick bed-jig after adopting the upper limit of the limiting ratio of the min function to be 1; Calculating to obtain a material water content index based on the current material water content, the optimal water content and the allowable upper limit of the water content through a quadratic parabolic function taking the optimal water content as a center, wherein the index is highest when the water content is an optimal value and is accelerated to be reduced along with the deviation of the water content from the optimal value; and carrying out weighted geometric average on the elastic modulus index of the brick masonry, the deformation modulus index of the brick bed mould and the water content index of the material to obtain the coefficient of performance of the material.
8. A tile tire membrane optimization system, comprising: The comprehensive load evaluation module is used for calculating and obtaining a comprehensive load coefficient based on active soil pressure at the back of the brick bed-jig, soil body pore water pressure after the bed-jig and additional load construction in an adjacent area; The displacement state evaluation module is used for calculating and acquiring a displacement state coefficient based on lateral accumulated displacement of the fetal membranes; the material performance evaluation module is used for calculating and obtaining a material performance coefficient based on the elastic modulus of the brick moulding bed brick masonry, the deformation modulus of the brick moulding bed and the water content of the material; The model-actual measurement displacement matching evaluation module is used for calculating and obtaining the model-actual measurement displacement matching degree based on the comprehensive load coefficient, the displacement state coefficient, the material performance coefficient, the tire membrane-supporting system temperature change and the environmental vibration acceleration; The axial force self-adaptive adjusting module is used for calculating and obtaining the real-time axial force of the target brick fetal membrane supporting point based on the model-actually measured displacement matching degree, the creep rate and the reference axial force, and adjusting the real-time axial force of the current brick fetal membrane supporting point to the real-time axial force of the target brick fetal membrane supporting point.

Description

Brick fetal membrane optimization method and system Technical Field The invention belongs to the technical field of constructional engineering, and particularly relates to a brick molding bed optimization method and system. Background The brick bed-jig is used as a foundation pit supporting temporary structure widely adopted in constructional engineering, and the traditional design and construction method of the brick bed-jig is relatively mature, but mainly depends on static calculation based on a limit balance theory. In actual engineering practice, engineers calculate the lateral load acting on the back of the fetal membrane by adopting classical soil pressure theory such as Rankine theory according to soil layer parameters provided by geological survey reports, and determine the arrangement mode and the design axial force of the supporting structure according to the lateral load. The design axial force is set to a fixed value for guiding the support material's model selection and installation process. However, the actual construction environment is a highly complex dynamic system, and the load applied to the brick bed is not constant but is significantly affected by various time-varying factors. The periodic fluctuation of the underground water level can cause the significant change of the pore water pressure of the soil body behind the diaphragm, the construction operation of the pile-up activity around the foundation pit or the adjacent area can generate additional load, the change of the environment temperature can cause the thermal expansion and contraction effect of the brick diaphragm and the supporting system material, and meanwhile, the operation of the construction machine can also bring continuous environment vibration. In addition, the material properties of the brick bed-jig, including the elastic modulus, the deformation modulus and the material moisture content of the brick masonry, also dynamically evolve along with the construction progress and the change of environmental conditions. The degradation of the properties of these materials, combined with the long-term creep effects of the soil and materials, further exacerbates structural instability. Existing construction techniques lack an effective systematic response mechanism to the dynamic factors described above. The supporting shaft force is usually kept unchanged after initial installation, and cannot be adaptively adjusted according to the load conditions and the structural states which change in real time. The static control mode can cause potential safety hazards of insufficient supporting force in the peak period of load, excessive lateral displacement of the tire membrane and even integral instability, and the excessive supporting force in the valley period of load not only causes waste of materials and energy sources, but also can generate unnecessary pre-damage to a brick masonry structure. Meanwhile, safety monitoring in the construction process mainly depends on manual regular inspection and displacement measurement of limited points, so that monitoring data is lagged, discontinuous and limited in coverage range, and early warning and active control of risks are difficult to realize. Therefore, an intelligent optimization scheme capable of integrating multisource real-time sensing data, dynamically evaluating the stress state of the brick moulding bed and automatically adjusting the supporting shaft force is urgently needed in the industry so as to realize the technical transition from static design, passive bearing to dynamic sensing and active control, thereby improving the economical efficiency and the reliability of engineering while ensuring the construction safety. In view of the above, there is a need in the art for improvements. Disclosure of Invention The embodiment of the invention aims to provide a brick fetal membrane optimization method and system, and aims to solve the problems. The brick fetal membrane optimizing method comprises the steps of calculating and obtaining a comprehensive load coefficient based on active soil pressure of the back of a brick fetal membrane, soil body pore water pressure behind the fetal membrane and construction additional load of an adjacent area, calculating and obtaining a displacement state coefficient based on lateral accumulated displacement of the fetal membrane, calculating and obtaining a material performance coefficient based on elastic modulus of the brick fetal membrane, deformation modulus of the brick fetal membrane and water content of materials, calculating and obtaining a model-actual measurement displacement matching degree based on the comprehensive load coefficient, the displacement state coefficient, the material performance coefficient, temperature change of a fetal membrane-supporting system and environmental vibration acceleration, calculating and obtaining real-time axial force of a target brick fetal membrane supporting point based on the model-actual meas