CN-121982841-A - Early warning method and system for deformation of wood template joint in concrete pouring process

CN121982841ACN 121982841 ACN121982841 ACN 121982841ACN-121982841-A

Abstract

The invention provides an early warning method for wood form joint deformation in a concrete pouring process, which comprises the steps of collecting strain data of a plurality of positions of a wood form joint in real time, determining monitoring strain force of the wood form joint based on the strain data, establishing an early warning threshold value and an alarm threshold value based on experimental data, construction experience data and finite element analysis data, wherein the early warning threshold value is smaller than the alarm threshold value, and carrying out grading early warning of corresponding levels according to comparison results of the monitoring strain force, the early warning threshold value and the alarm threshold value. According to the early warning method for the deformation of the wood template splice joint in the concrete pouring process, the splice joint deformation is monitored in real time and quantitatively, the traditional mode of relying on manual experience and passively finding out problems is greatly changed, the prevention nodes of safety accidents are greatly advanced, sufficient treatment time is reserved, the risks of die expansion, die explosion and the like are effectively eliminated, and the safety guarantee level of the construction process is greatly improved.

Inventors

SU GUANNAN
HAN ZHENHUA
YIN TINGTING
XU PENG

Assignees

上海建工集团股份有限公司

Dates

Publication Date: 20260505
Application Date: 20251231

Claims (10)

1. The utility model provides a method for early warning deformation of a wood template joint in a concrete pouring process, which is characterized by comprising the following steps: Strain data at a plurality of positions at the joints of the wood templates are collected in real time; determining a monitored strain force at the wood form joint based on the strain data; Establishing an early warning threshold value and an alarm threshold value based on experimental data, construction experience data and finite element analysis data, wherein the early warning threshold value is smaller than the alarm threshold value; and carrying out grading early warning of corresponding level according to the comparison result of the monitoring strain force with the early warning threshold value and the alarm threshold value.
2. The method of claim 1, wherein the step of collecting strain data at a plurality of locations at the wood form panel seam in real time comprises: strain data distributed along the extending direction of the splice at a plurality of positions on two sides of the splice of the wood template are collected in real time.
3. The early warning method according to claim 2, wherein the real-time acquisition of the acquisition point of the wood template joint is performed at a risk joint position, wherein the risk joint position comprises a large-span bottom, a position with a maximum side pressure of a high-narrow beam and a joint weak position.
4. The method of pre-warning of claim 1, further comprising, between the step of collecting in real time multi-point strain data at a wood form joint and the step of determining a monitored strain force at the wood form joint based on the strain data: the strain data at the plurality of locations is subjected to temperature compensation and calibration processes.
5. The method of claim 1, wherein the step of establishing an alarm threshold based on experimental data, construction experience data, and finite element analysis data comprises: Determining an alarm threshold S2 according to the critical stress sigma cr of the wood template material, the elastic modulus E of the wood template material and the material non-uniformity safety margin gamma 1 ; Wherein, the
6. The method of claim 1, wherein the step of establishing the pre-warning threshold based on experimental data, construction experience data, and finite element analysis data comprises: Determining an early warning threshold S 1 according to the critical stress sigma cr of the wood template material, the elastic modulus E of the wood template material, the material non-uniformity safety margin gamma 1 and the comprehensive safety coefficient gamma 2 ; Wherein, the
7. The method of claim 1, wherein the corresponding alert signal comprises an audible and visual alert when the monitored strain exceeds an alert threshold.
8. The method of claim 1, further comprising: Determining a strain change rate according to the mapping relation between the monitoring strain and time; and carrying out grading early warning of corresponding level based on the strain change rate, the monitoring strain force, an early warning threshold value and an alarm threshold value comparison result.
9. The method according to any one of claims 1 to 8, further comprising storing a complete monitoring data record after the casting is completed, and generating a monitoring report of the casting as an engineering file.
10. An early warning system for the deformation of a wood formwork splice joint in a concrete pouring process, based on the early warning method of any one of claims 1 to 9, comprising: the sensor module is used for collecting strain data at a plurality of positions at the joint of the wood template in real time; The data processing module is used for determining the monitoring strain force at the wood template joint based on the strain data; The alarm judgment module is used for establishing an early warning threshold value and an alarm threshold value based on experimental data, construction experience data and finite element analysis data, wherein the early warning threshold value is smaller than the alarm threshold value; And the early warning signal module carries out grading early warning of corresponding level according to the comparison result of the monitoring strain force with the early warning threshold value and the warning threshold value.

Description

Early warning method and system for deformation of wood template joint in concrete pouring process Technical Field The invention relates to the technical field of building construction safety monitoring, in particular to a method and a system for early warning of deformation of a wood formwork splice joint in a concrete pouring process. Background In the construction of building engineering concrete pouring, the wooden templates are widely applied due to the characteristics of convenient material taking, flexible processing and the like, but when the traditional wooden templates bear lateral pressure of concrete, the phenomena of die expansion and even die explosion are easy to occur due to the problems of loose joint sealing, local stress concentration and the like. The expansion die explosion not only can cause structural defects of slurry leakage, rib leakage, dimensional deviation and the like of a concrete member, but also can cause safety accidents when severe, thereby causing great economic loss and casualties. The existing monitoring means mainly rely on manual inspection, and have the defects of low efficiency and delayed early warning, so that the micro deformation of the stress concentration key point of the joint can not be monitored in real time and continuously and accurately, the effective early warning is difficult to be sent out before the expansion die explosion occurs, and the safety control requirement of modern building construction can not be met. Therefore, a technical scheme capable of actively, accurately and real-timely monitoring the deformation of the wood template splice is needed, and the defect of the traditional monitoring mode is overcome. Disclosure of Invention The invention mainly aims to provide an early warning method and system for the deformation of a wood template joint in the concrete pouring process, so as to solve the technical problems of low efficiency and early warning lag of the traditional monitoring mode. In order to achieve the above purpose, the invention provides an early warning method for deformation of a wood formwork splice joint in a concrete pouring process, which comprises the following steps: Strain data at a plurality of positions at the joints of the wood templates are collected in real time. And determining the monitoring strain force at the wood template joint based on the strain data. And establishing an early warning threshold value and an alarm threshold value based on experimental data, construction experience data and finite element analysis data, wherein the early warning threshold value is smaller than the alarm threshold value. And carrying out grading early warning of corresponding level according to the comparison result of the monitoring strain force with the early warning threshold value and the alarm threshold value. According to an embodiment of the present application, the step of collecting strain data at a plurality of positions at the abutted seam of the wood form in real time includes: strain data distributed along the extending direction of the splice at a plurality of positions on two sides of the splice of the wood template are collected in real time. According to the embodiment of the application, the collecting point at the wood template seam is collected in real time to form a risk seam position, wherein the risk seam position comprises a large-span bottom, a high-narrow beam side pressure maximum position and a seam weak position. According to an embodiment of the present application, between the step of collecting in real time multi-point strain data at the wood form joints and the step of determining the monitored strain force at the wood form joints based on the strain data, further comprises: the strain data at the plurality of locations is subjected to temperature compensation and calibration processes. According to an embodiment of the present application, the step of establishing the alarm threshold based on the experimental data, the construction experience data, and the finite element analysis data includes: And determining an alarm threshold S2 according to the critical stress sigma cr of the wood template material, the elastic modulus E of the wood template material and the material non-uniformity safety margin gamma 1. Wherein, the According to an embodiment of the present application, the step of establishing the early warning threshold based on the experimental data, the construction experience data and the finite element analysis data includes: And determining an early warning threshold S 1 according to the critical stress sigma cr of the wood template material, the elastic modulus E of the wood template material, the material non-uniformity safety margin gamma 1 and the comprehensive safety coefficient gamma 2. Wherein, the According to the embodiment of the application, when the monitoring strain exceeds the alarm threshold, the corresponding early warning signal comprises an audible and visual alarm.