CN-121992942-A - Construction method and construction equipment for concrete

CN121992942ACN 121992942 ACN121992942 ACN 121992942ACN-121992942-A

Abstract

The invention provides a construction method of concrete, which comprises the following steps of S100, laying a plurality of early dismantling devices and temperature sensors at a plurality of supporting points of a concrete structure to form a distributed sensor array covering a construction area, acquiring temperature data of each temperature sensor in real time through a monitoring platform in a concrete pouring and curing stage, S200, analyzing whether the change rate of the temperature data is normal or not through the monitoring platform, analyzing and evaluating whether an early dismantling instruction is generated or not through the monitoring platform according to the temperature data if the change rate of the temperature data is normal, S300, firstly dismantling a template and a main keel according to the early dismantling instruction, and reserving the early dismantling devices and vertical supports, S400, continuously calculating to obtain new estimated strength and a weighted average value through the monitoring platform according to the real-time temperature data, analyzing the relation between the estimated strength, the weighted average value and the concrete design strength, and judging whether the early dismantling devices and the vertical supports are required.

Inventors

Shu Jianbo
WANG YIFEI
CHEN PEIHUA
LIU PENG
Wang Nankai
LI MING
WANG SHENG
WU JIANCHENG

Assignees

中交一公局集团有限公司
中交一公局第二工程有限公司

Dates

Publication Date: 20260508
Application Date: 20260130

Claims (10)

1. The construction method of the concrete is characterized by comprising the following steps of: S100, arranging a plurality of early-dismantling devices and temperature sensors at a plurality of supporting points of a concrete structure to form a distributed sensor array covering a construction area; S200, analyzing whether the change rate of the temperature data is normal by using the monitoring platform, if so, analyzing and evaluating whether an early-dismantling instruction is generated by using the monitoring platform according to the temperature data, wherein the early-dismantling instruction is generated according to the following steps that S201, the monitoring platform is used for each monitoring point according to the real-time temperature data Calculating according to the maturity model to obtain the estimated intensity of each monitoring point Weighted average of the estimated intensities for each monitoring point ; S202, evaluating a condition A and a condition B, wherein the condition A is a weighted average value of all monitoring points The design strength of the concrete is achieved 50% Or more, the condition B is estimated intensity Below 0.45 · The proportion of monitoring points of the system is not more than 5%; s203, when the condition A and the condition B are met simultaneously, the monitoring platform generates an early-dismantling instruction; s300, removing the template and the main joist in advance according to the early-dismantling instruction, and reserving the early-dismantling device and the vertical support; S400, continuously calculating and obtaining new estimated intensity according to the real-time temperature data by utilizing the monitoring platform Weighted average And analyzing the estimated intensity Weighted average Designed strength with concrete The relation between when the weighted average Reaching 0.75 · And the estimated intensities of all monitoring points Not less than 0.65 · And removing the early-dismantling device and the vertical support.
2. The method according to claim 1, wherein in step S201, the monitoring platform is calculated according to formula (1) and formula (2) 、 The formula (1) is: , The formula (2) is: , Wherein, the In order to achieve the degree of maturity of the concrete, As the weight of the material to be weighed, Is a monitoring point of the sensor; the standard value of the compressive strength of the cube is determined according to the concrete mixing proportion; And And (5) adapting coefficients for the concrete varieties determined through calibration tests.
3. The method according to claim 2, wherein the maturity model calculates the maturity of the concrete by accumulating the difference between the temperature of each period and the reference temperature with reference temperature of 20 ℃ by adopting an equivalent age method 。
4. The method for constructing concrete according to claim 2, wherein the calibration test comprises the steps of manufacturing a test piece by using concrete with a construction mix ratio, continuously monitoring the center temperature of the test piece, measuring the compressive strength of the test piece in multiple ages, and carrying out nonlinear fitting on obtained maturity-strength data pairs to obtain the concrete variety adaptation coefficient.
5. The method according to claim 1, wherein in the step S200, the monitoring platform generates the early warning command when the monitoring platform monitors that the difference between the temperatures of adjacent sensors in the same casting block is greater than 10 ℃ or the rate of change of the temperature of any sensor exceeds 3 ℃ per hour.
6. The method for constructing concrete according to claim 5, wherein the monitoring platform generates the abnormal temperature value label while generating the early warning command.
7. The method according to claim 1, wherein the early-dismantling device comprises a supporting rod and a bracket, the bracket is detachably connected with the supporting rod, and a mounting groove for mounting the temperature sensor is reserved on the top surface.
8. The method according to claim 1, wherein the sampling frequency of the monitoring platform in step S100 is set to 1-2 times/hour.
9. The method for constructing concrete according to claim 1, wherein the temperature sensor is a miniature waterproof wireless temperature sensor and is protected by sealant.
10. Construction equipment for the construction method according to any one of claims 1-9, characterized in that the construction equipment comprises a plurality of the early-dismantling devices, a distributed sensor array and a monitoring platform, wherein the maturity model is built in the monitoring platform.

Description

Construction method and construction equipment for concrete Technical Field The invention relates to the technical field of concrete, in particular to a construction method and construction equipment of concrete. Background In cast-in-place concrete structure construction, the turnover efficiency of the formwork support system directly influences the engineering progress and the construction cost. In order to shorten the construction period and save materials, a common early form removal technology is used, partial forms and supports are removed in advance for turnover before the strength of the concrete does not reach the design standard, and necessary supports are reserved until the strength completely meets the requirement. In the existing early dismantling construction technology, a fixed maintenance day is estimated as a dismantling basis according to the factors of seasons, weather, concrete marks and the like, often depending on experience of constructors. The method has large volatility, cannot calculate concrete changes such as cement batch, pouring temperature, wind speed and the like, often leads to overlong idle time of the template and the support for safety, loses the effect of early disassembly, and can cause safety accidents such as structural cracking, downwarping, collapse and the like when the template is disassembled in advance due to misjudgment. The other method is to leave concrete test blocks on site during construction, send the concrete test blocks to a laboratory for testing after reaching a preset age, and infer the strength of the structural entity by the strength of the test blocks. However, it takes a long time to wait for the test result, and the early dismantling operation cannot be performed on time. Disclosure of Invention The invention aims to overcome the defects of the prior art and provide a construction method of concrete. In order to achieve the aim, the invention adopts the following technical scheme that the construction method of the concrete comprises the following steps: S100, arranging a plurality of early-dismantling devices and temperature sensors at a plurality of supporting points of a concrete structure to form a distributed sensor array covering a construction area; S200, analyzing whether the change rate of the temperature data is normal by using the monitoring platform, if so, analyzing and evaluating whether an early-dismantling instruction is generated by using the monitoring platform according to the temperature data, wherein the early-dismantling instruction is generated according to the following steps that S201, the monitoring platform is used for each monitoring point according to the real-time temperature data Calculating according to the maturity model to obtain the estimated intensity of each monitoring pointWeighted average of the estimated intensities for each monitoring point; S202, evaluating a condition A and a condition B, wherein the condition A is a weighted average value of all monitoring pointsThe design strength of the concrete is achieved50% Or more, the condition B is estimated intensityBelow 0.45 ·The proportion of monitoring points of the system is not more than 5%; s203, when the condition A and the condition B are met simultaneously, the monitoring platform generates an early-dismantling instruction; s300, removing the template and the main joist in advance according to the early-dismantling instruction, and reserving the early-dismantling device and the vertical support; S400, continuously calculating and obtaining new estimated intensity according to the real-time temperature data by utilizing the monitoring platform Weighted averageAnd analyzing the estimated intensityWeighted averageDesigned strength with concreteThe relation between when the weighted averageReaching 0.75 ·And the estimated intensities of all monitoring pointsNot less than 0.65 ·And removing the early-dismantling device and the vertical support. In the first aspect, in the step S201, the monitoring platform calculates according to the formula (1) and the formula (2)、The formula (1) is: , The formula (2) is: , Wherein, the In order to achieve the degree of maturity of the concrete,As the weight of the material to be weighed,Is a monitoring point of the sensor; the standard value of the compressive strength of the cube is determined according to the concrete mixing proportion; And And (5) adapting coefficients for the concrete varieties determined through calibration tests. In the first aspect, the maturity model adopts an equivalent age method, takes 20 ℃ as a reference temperature, and calculates the concrete maturity by accumulating the difference value between the temperature of each period and the reference temperature。 In the first aspect, the calibration test comprises the steps of manufacturing a test piece by adopting concrete with construction mixing proportion, continuously monitoring the center temperature of the test piece, measuring the compr