阅读说明：本技术 一种基础底板大体积混凝土智能化养护系统及方法 (Intelligent maintenance system and method for mass concrete of foundation slab ) 是由 房霆宸 陈渊鸿 左俊卿 赵一鸣 于 2021-08-20 设计创作，主要内容包括：本发明提供一种基础底板大体积混凝土智能化养护系统及方法,采用毛细血管压力检测系统、喷淋养护系统以及BIM自动定位系统,BIM自动定位系统包括混凝土养护BIM三维模型信息数据库以及GPS定位模块,每个GPS定位模块实时获取对应养护装置的位置信息；当毛细管压力传感器所测得的压力高于对应的混凝土收缩压力阈值一定比例时,获取其坐标信息,养护装置坐标信息基于GPS定位系统实时获取,选定运行路径不与既有结构发生碰撞且到达该毛细管压力传感器所在区域的运行路径最短的养护装置；选定的养护装置到位后喷水养护,直至该区域的混凝土塑性收缩压力降至正常,从而实现基础底板大体积混凝土的自动养护。(The invention provides a large-volume concrete intelligent maintenance system and method for a foundation slab, which adopt a capillary pressure detection system, a spray maintenance system and a BIM automatic positioning system, wherein the BIM automatic positioning system comprises a concrete maintenance BIM three-dimensional model information database and GPS positioning modules, and each GPS positioning module acquires the position information of a corresponding maintenance device in real time; when the pressure measured by the capillary pressure sensor is higher than the corresponding concrete shrinkage pressure threshold value by a certain proportion, acquiring the coordinate information of the capillary pressure sensor, acquiring the coordinate information of the maintenance device in real time based on a GPS positioning system, and selecting the maintenance device with the shortest operation path, wherein the operation path does not collide with the existing structure and reaches the area where the capillary pressure sensor is located; and (4) spraying water for curing after the selected curing device is in place until the plastic shrinkage pressure of the concrete in the area is reduced to be normal, thereby realizing the automatic curing of the mass concrete of the foundation slab.)

1. The utility model provides an intelligent maintenance system of soleplate bulky concrete which characterized in that includes: the device comprises a capillary pressure detection system, a spraying maintenance system, a BIM automatic positioning system and a control system, wherein the capillary pressure detection system, the spraying maintenance system and the BIM automatic positioning system are respectively controlled by the control system; the capillary pressure detection system comprises capillary pressure sensors and a data collector, wherein the capillary pressure sensors are arranged in mass concrete of a foundation slab and are numbered, the capillary pressure sensors transmit pressure data generated by the surface shrinkage of the concrete to the data collector, and the data collector collects the pressure data detected by the capillary pressure sensors and transmits the pressure data to the BIM automatic positioning system; the spraying maintenance system comprises a walking track and a plurality of maintenance devices, the walking track is erected above the mass concrete of the foundation slab, and each maintenance device is arranged on the walking track and can walk on the walking track; the BIM automatic positioning system comprises a concrete maintenance BIM three-dimensional model information database, a plurality of GPS positioning modules and a data transmitter, wherein each maintenance device is provided with one GPS positioning module, each GPS positioning module acquires position information of the corresponding maintenance device in real time, the position information is subjected to coordinate conversion and then is input into the concrete maintenance BIM three-dimensional model information database to obtain coordinates of the corresponding maintenance device, and the data acquisition unit collects pressure data detected by each capillary pressure sensor through the data transmitter and then transmits the pressure data to the concrete maintenance BIM three-dimensional model information database; when the pressure measured by the capillary pressure sensor is higher than the corresponding concrete shrinkage pressure threshold value by a certain proportion, acquiring the serial number of the capillary pressure sensor, acquiring the coordinate information of the corresponding capillary pressure sensor through a concrete curing BIM three-dimensional model information database, and matching the capillary pressure sensor with all nearby curing devices to obtain the coordinates of all nearby curing devices; and acquiring running paths of all nearby maintenance devices reaching the area where the capillary pressure sensor is located, selecting the maintenance devices for water spraying maintenance, wherein the running paths of the selected maintenance devices do not collide with the existing structure and are the shortest in running path reaching the area where the capillary pressure sensor is located.

2. The intelligent foundation slab bulk concrete curing system of claim 1, wherein each capillary pressure sensor wirelessly transmits the pressure generated by the detected concrete surface shrinkage to the data collector.

3. The intelligent foundation slab bulk concrete curing system according to claim 1, wherein each curing device comprises a box body, a water storage tank, a water feeding submersible pump, a water feeding main pipe, adjustable bent branch pipes, a spray head, a servo motor and a control box, the bottom of the box body is provided with a plurality of rollers, the servo motor drives the rollers to move on a walking track, the water feeding submersible pump is installed in the water storage tank, one end of the water feeding main pipe is connected with the water feeding submersible pump, the other end of the water feeding main pipe is connected with the adjustable bent branch pipes which are uniformly distributed in six directions through water distribution connectors, the water feeding main pipe is provided with a control main valve, each adjustable bent branch pipe is provided with a respective flow control electromagnetic valve, and the servo motor, the control main valve, the flow control electromagnetic valve and the water feeding submersible pump are respectively connected with and controlled by the control box.

4. The intelligent maintenance system for the large-volume concrete of the foundation slab as claimed in claim 3, wherein the control system is in communication connection with the BIM automatic positioning system and the control box respectively.

5. The intelligent maintenance system for the large-volume concrete of the foundation slab as claimed in claim 1, wherein the concrete maintenance BIM three-dimensional model information database is established according to the peripheral structure of the foundation slab, the shape and the size of the foundation slab, the walking rails and the maintenance devices, and the position relationship of the peripheral structure of the foundation slab, the walking rails and the maintenance devices relative to the foundation slab.

6. The intelligent maintenance system for the large-volume concrete of the foundation slab as claimed in claim 5, characterized in that the BIM model of the foundation slab to be poured in the BIM information database is converted into a numerical simulation analysis model of the stress distribution of the large-volume concrete for stress analysis, capillary pressure sensors are respectively arranged in crack sensitive areas with more structural constraints or stress concentration or large stress gradient in the BIM model of the foundation slab to be poured according to the numerical analysis result, and a concrete shrinkage pressure threshold value is recorded in the BIM information database.

7. The intelligent maintenance system for the large-volume concrete of the foundation slab as claimed in claim 3, wherein the opening degree of the flow control solenoid valve is determined according to the ratio of the pressure detected by the capillary pressure sensor to the ultimate tensile strength of the concrete, and the water supply submersible pump and the flow control solenoid valve are closed after the plastic shrinkage pressure of the concrete is reduced to normal.

8. The intelligent maintenance system for the large-volume concrete of the foundation slab as claimed in claim 7, wherein when the pressure detected by the capillary pressure sensor reaches 90% of the ultimate tensile strength of the concrete, the opening degree of the flow control solenoid valve is controlled to be 30%, and when the pressure detected by the capillary pressure sensor increases by 5%, the opening degree of the flow control solenoid valve is increased by 30%, the water spraying amount is increased, and the concrete shrinkage pressure is accelerated to be reduced until the pressure detected by the capillary pressure sensor returns to be lower than 80% of the ultimate tensile strength of the concrete, and the water supply submersible pump and the flow control solenoid valve are closed.

9. The intelligent foundation slab bulk concrete curing system of claim 1, wherein the concrete shrinkage pressure threshold is 80% of the ultimate tensile strength of the concrete.

10. An intelligent maintenance method for mass concrete of a foundation slab, which is characterized in that the intelligent maintenance system for mass concrete of a foundation slab as claimed in any one of claims 1 to 9 is adopted.

Technical Field

The invention belongs to the technical field of building construction, and particularly relates to a system and a method for intelligently maintaining mass concrete of a foundation slab.

Background

In the construction process of the building engineering, the concrete is used as an important structural material, and the construction quality of the concrete plays an important role in the quality safety of the structural engineering. With the continuous enlargement of the building scale, the volume of the concrete structure is correspondingly increased, thereby ensuring the stability and the safety of the structure. Concrete shrinkage crack control is a key point of attention in the construction process of a concrete structure, and once cracks occur, great hidden dangers are generated on the structural safety. The shrinkage of the large-volume concrete of the building foundation slab is influenced by various factors such as materials, structural constraint, construction, environment and the like, and reasonable construction and maintenance measures have an extremely important effect on reducing the shrinkage and cracking tendency of the large-volume concrete.

At present, bulky concrete sprays maintenance and relies on artifical watering to accomplish mostly, and maintenance work relies on workman's experience to accomplish more moreover, not only is difficult to have corresponding high shrinkage region shrinkage stress that reduces, has a large amount of manpowers and water waste simultaneously, is difficult to guarantee construction maintenance quality.

Disclosure of Invention

The invention aims to provide a system and a method for intelligently maintaining mass concrete of a foundation slab, which can automatically position, plan a tail end path and intelligently control, and solve the problems that maintenance work in the prior art is mostly finished by depending on the experience of workers, the shrinkage stress of a high shrinkage area is difficult to be reduced in a targeted manner, a large amount of manpower and water resources are wasted, and the construction maintenance quality is difficult to ensure.

In order to solve the technical problems, the invention provides the following technical scheme:

the utility model provides an intelligent maintenance system of soleplate bulky concrete, includes: the device comprises a capillary pressure detection system, a spraying maintenance system, a BIM automatic positioning system and a control system, wherein the capillary pressure detection system, the spraying maintenance system and the BIM automatic positioning system are respectively controlled by the control system; the capillary pressure detection system comprises capillary pressure sensors and a data collector, wherein the capillary pressure sensors are arranged in mass concrete of a foundation slab and are numbered, the capillary pressure sensors transmit pressure data generated by the surface shrinkage of the concrete to the data collector, and the data collector collects the pressure data detected by the capillary pressure sensors and transmits the pressure data to the BIM automatic positioning system; the spraying maintenance system comprises a walking track and a plurality of maintenance devices, the walking track is erected above the mass concrete of the foundation slab, and each maintenance device is arranged on the walking track and can walk on the walking track; the BIM automatic positioning system comprises a concrete maintenance BIM three-dimensional model information database, a plurality of GPS positioning modules and a data transmitter, wherein each maintenance device is provided with one GPS positioning module, each GPS positioning module acquires position information of the corresponding maintenance device in real time, the position information is subjected to coordinate conversion and then is input into the concrete maintenance BIM three-dimensional model information database to obtain coordinates of the corresponding maintenance device, and the data acquisition unit collects pressure data detected by each capillary pressure sensor through the data transmitter and then transmits the pressure data to the concrete maintenance BIM three-dimensional model information database; when the pressure measured by the capillary pressure sensor is higher than the corresponding concrete shrinkage pressure threshold value by a certain proportion, acquiring the serial number of the capillary pressure sensor, acquiring the coordinate information of the capillary pressure sensor through a concrete curing BIM three-dimensional model information database, and matching the capillary pressure sensor with all nearby curing devices to obtain the coordinates of all nearby curing devices; and acquiring running paths of all nearby maintenance devices reaching the area where the capillary pressure sensor is located, selecting the maintenance devices for water spraying maintenance, wherein the running paths of the selected maintenance devices do not collide with the existing structure and are the shortest in running path reaching the area where the capillary pressure sensor is located.

Preferably, in the above-mentioned foundation slab bulk concrete intelligent maintenance system, each capillary pressure sensor transmits the detected pressure generated by the concrete surface shrinkage to the data collector in a wireless signal manner.

Preferably, in the above-mentioned intelligent maintenance system for large-volume concrete of foundation slab, each maintenance device includes a tank, a reservoir, a water-feeding submersible pump, a water-feeding trunk pipe, an adjustable bent branch pipe, a spray header, a servo motor and a control box, the bottom of the tank is provided with a plurality of rollers, the servo motor drives the rollers to move on a walking track, the water-feeding submersible pump is installed in the reservoir, one end of the water-feeding trunk pipe is connected with the water-feeding submersible pump, the other end of the water-feeding trunk pipe is connected with the adjustable bent branch pipes uniformly distributed in six directions through a water distribution joint, the water-feeding trunk pipe is provided with a control main valve, each adjustable bent branch pipe is provided with a respective flow control electromagnetic valve, and the servo motor, the control main valve, the flow control electromagnetic valve and the water-feeding submersible pump are respectively connected with and controlled by the control box.

Preferably, in the above-mentioned intelligent maintenance system for mass concrete of foundation slab, the concrete maintenance BIM three-dimensional model information database is established according to the peripheral structure of foundation slab, the shape and size of foundation slab, the walking track and the maintenance device, and the position relationship of the peripheral structure of foundation slab, the walking track and the maintenance device with respect to the foundation slab.

Preferably, in the intelligent maintenance system for the large-volume concrete of the foundation slab, a to-be-poured foundation slab BIM in the concrete maintenance BIM three-dimensional model information database is converted into a large-volume concrete stress distribution numerical simulation analysis model for stress analysis, capillary pressure sensors are respectively arranged in crack sensitive areas with more structural constraints or stress concentration or large stress gradient in the to-be-poured foundation slab BIM according to the numerical analysis result, and a concrete shrinkage pressure threshold value is recorded in the concrete maintenance BIM three-dimensional model information database.

Preferably, in the above-mentioned intelligent maintenance system for large-volume concrete of foundation slab, the opening degree of the flow control solenoid valve is determined according to the ratio of the pressure detected by the capillary pressure sensor to the ultimate tensile strength of concrete, and the water-feeding submersible pump and the flow control solenoid valve are closed after the plastic shrinkage pressure of concrete is reduced to normal.

Preferably, in the above-mentioned intelligent maintenance system for large-volume concrete of foundation slab, when the pressure detected by the capillary pressure sensor reaches 90% of the ultimate tensile strength of the concrete, the opening of the flow control solenoid valve is controlled by 30%, and when the pressure detected by the capillary pressure sensor increases by 5%, the opening of the flow control solenoid valve is increased by 30%, the water spraying amount is increased, and the concrete shrinkage pressure is accelerated to be reduced until the pressure detected by the capillary pressure sensor returns to 80% or less of the ultimate tensile strength of the concrete, and the water supply submersible pump and the flow control solenoid valve are closed.

Preferably, in the above-mentioned foundation slab bulk concrete intelligent maintenance system, the concrete shrinkage pressure threshold is 80% of the ultimate tensile strength of the concrete.

An intelligent maintenance method for mass concrete of a foundation slab adopts the intelligent maintenance system for mass concrete of the foundation slab.

According to the technical scheme disclosed above, compared with the prior art, the invention has the following beneficial effects:

the invention provides an intelligent maintenance system and method for large-volume concrete of a foundation slab, which adopts a control system, a capillary pressure detection system controlled by the control system, a spray maintenance system and a BIM automatic positioning system, wherein the capillary pressure detection system comprises a plurality of capillary pressure sensors and a data acquisition unit, the plurality of capillary pressure sensors are arranged in the large-volume concrete of the foundation slab and are numbered for each capillary pressure sensor, each capillary pressure sensor transmits pressure data generated by the detected surface shrinkage of the concrete to the data acquisition unit, and the data acquisition unit collects the pressure data detected by each capillary pressure sensor and transmits the pressure data to the BIM automatic positioning system; the spraying maintenance system comprises a walking track and a plurality of maintenance devices, the walking track is erected above the mass concrete of the foundation slab, and each maintenance device is arranged on the walking track and can walk on the walking track; the BIM automatic positioning system comprises a concrete maintenance BIM three-dimensional model information database, a plurality of GPS positioning modules and a data transmitter, wherein each maintenance device is provided with one GPS positioning module, each GPS positioning module acquires position information of the corresponding maintenance device in real time, the position information is subjected to coordinate conversion and then is input into the concrete maintenance BIM three-dimensional model information database to obtain coordinates of the corresponding maintenance device, and the data acquisition unit collects pressure data detected by each capillary pressure sensor through the data transmitter and then transmits the pressure data to the concrete maintenance BIM three-dimensional model information database; when the pressure measured by the capillary pressure sensor is higher than the corresponding concrete shrinkage pressure threshold value by a certain proportion, acquiring the serial number of the capillary pressure sensor, acquiring the coordinate information of the capillary pressure sensor through a concrete curing BIM three-dimensional model information database, and matching the capillary pressure sensor with all nearby curing devices to obtain the coordinates of all nearby curing devices; the method comprises the steps of obtaining running paths of all nearby curing devices reaching the area where the capillary pressure sensor is located, selecting the curing devices for water spraying curing, wherein the running paths of the selected curing devices do not collide with an existing structure and are the shortest in running path reaching the area where the capillary pressure sensor is located.

Drawings

FIG. 1 is a schematic structural diagram of an intelligent maintenance system for mass concrete of a foundation slab.

Fig. 2 is a schematic view of the arrangement of the walking track on the foundation slab.

In the figure: the system comprises a base bottom plate 1, a walking track 2, a maintenance device 3, a box body 30, a water storage tank 31, a water supply submersible pump 32, a water supply main pipe 33, a bending adjustable branch pipe 34, a spray header 35, a control box 36, a control main valve 37, a flow control electromagnetic valve 38, a roller 39, a capillary pressure sensor 4 and a GPS positioning module 5.

Detailed Description

The invention is described in further detail below with reference to the figures and specific examples. The technical contents and features of the present invention will be described in detail below with reference to the embodiments illustrated in the accompanying drawings. It is further noted that the drawings are in greatly simplified form and are not to precise scale, merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention. For convenience of description, the directions of "up" and "down" described below are the same as the directions of "up" and "down" in the drawings, but this is not a limitation of the technical solution of the present invention.

Referring to fig. 1 to 2, the present embodiment discloses an intelligent maintenance system for mass concrete of foundation slab, including: the device comprises a capillary pressure detection system, a spraying maintenance system, a BIM automatic positioning system and a control system, wherein the capillary pressure detection system, the spraying maintenance system and the BIM automatic positioning system are respectively controlled by the control system; the capillary pressure detection system comprises a plurality of capillary pressure sensors 4 and a data collector, wherein the capillary pressure sensors 4 are arranged in a foundation slab 1 to be poured, the capillary pressure sensors 4 are arranged in mass concrete of the foundation slab, each capillary pressure sensor is numbered, each capillary pressure sensor 4 transmits pressure data generated by the detected concrete surface shrinkage to the data collector, and the data collector collects the pressure data detected by each capillary pressure sensor 4 and then transmits the pressure data to the BIM automatic positioning system; the spraying maintenance system comprises a walking track 2 and a plurality of maintenance devices 3, wherein the walking track 2 is erected above the mass concrete of the foundation slab, and each maintenance device 3 is arranged on the walking track 2 and can walk on the walking track 2; the BIM automatic positioning system comprises a concrete maintenance BIM three-dimensional model information database, a plurality of GPS positioning modules 5 and a data transmitter, wherein each maintenance device 3 is provided with one GPS positioning module 5, each GPS positioning module 5 acquires position information corresponding to the maintenance device 3 in real time, the position information is subjected to coordinate conversion and then is input into the concrete maintenance BIM three-dimensional model information database to obtain coordinates corresponding to the maintenance device 3, and the data acquisition unit collects pressure data detected by each capillary pressure sensor 4 through the data transmitter and then transmits the pressure data to the concrete maintenance BIM three-dimensional model information database; when the pressure measured by the capillary pressure sensor 4 is higher than the corresponding concrete shrinkage pressure threshold value by a certain proportion, acquiring the serial number of the capillary pressure sensor 4, acquiring the coordinate information of the capillary pressure sensor 4 through a concrete curing BIM three-dimensional model information database, and matching the capillary pressure sensor 4 with all the nearby curing devices 3 to obtain the coordinates of all the nearby curing devices 3; the method comprises the steps of obtaining running paths of all nearby curing devices 3 reaching the area where the capillary pressure sensor 4 is located, selecting the curing devices 3 for water spraying curing, enabling the selected running paths of the curing devices 3 not to collide with an existing structure and enabling the running paths reaching the area where the capillary pressure sensor 4 is located to be the shortest, and accordingly controlling the opening and closing of the flow control electromagnetic valve 38 according to pressure change feedback values generated when the concrete surface is in plastic cracking risks.

In order to improve the curing effect of the mass concrete, in this embodiment, the concrete shrinkage pressure threshold is 80% of the ultimate tensile strength of the concrete.

Preferably, in the above-mentioned intelligent maintenance system for large-volume concrete of foundation slab, each capillary pressure sensor 4 transmits the detected pressure generated by the shrinkage of the concrete surface to the data collector in a wireless signal manner, and by transmitting data in a wireless manner, the constraint of a cable can be eliminated, so that the intelligent maintenance system for large-volume concrete of foundation slab has the advantages of convenience in maintenance and strong capacity expansion capability.

Preferably, in the above-mentioned intelligent maintenance system for mass concrete of foundation slab, each maintenance device 3 includes a box 30, a reservoir 31, a water-feeding submersible pump 32, a water-feeding main pipe 33, adjustable bent branch pipes 34, a spray header 35, a servo motor (not shown) and a control box 36, the bottom of the box 30 is provided with a plurality of rollers 39, the servo motor drives the rollers 39 to move on the walking track 2, the water-feeding submersible pump 32 is installed in the reservoir 31, one end of the water-feeding main pipe 33 is connected with the water-feeding submersible pump 32, the other end is connected with the adjustable bent branch pipes 34 uniformly distributed in six directions through water-distributing joints, the water-feeding main pipe 33 is provided with a control main valve 37, each adjustable bent branch pipe 34 is provided with a respective flow control electromagnetic valve 38, the servo motor, the control main valve 37, the flow control electromagnetic valve 38 and the water supply submersible pump 32 are respectively connected with and controlled by the control box 36. When the curing device 3 reaches the area to be sprayed, where the pressure detected by the capillary pressure sensor 4 exceeds the standard, the water supply submersible pump 32 is started, and the control main valve 37 and the flow control electromagnetic valves 38 on the corresponding adjustable bent branch pipes are opened simultaneously, so that the concrete is cured effectively in time and prevented from cracking.

Preferably, in the above-mentioned intelligent maintenance system for large-volume concrete of foundation slab, the control system is connected with the BIM automatic positioning system and the control box 36 respectively, so as to realize the automatic intelligent maintenance for large-volume concrete of foundation slab, improve the concrete maintenance efficiency, and reduce the maintenance labor cost.

Preferably, in the above-mentioned intelligent maintenance system for mass concrete of foundation slab, the concrete maintenance BIM three-dimensional model information database is established according to the peripheral structure of foundation slab, the shape and size of foundation slab 1, the traveling rail 2 and the maintenance device 3, and the positional relationship of the peripheral structure of foundation slab 1, the traveling rail 2 and the maintenance device 3 with respect to foundation slab 1.

Preferably, in the intelligent maintenance system for the large-volume concrete of the foundation slab, a to-be-poured foundation slab BIM in the concrete maintenance BIM three-dimensional model information database is converted into a large-volume concrete stress distribution numerical simulation analysis model for stress analysis, capillary pressure sensors 4 are respectively arranged in crack sensitive areas with more structural constraints or stress concentration or large stress gradient in the to-be-poured foundation slab BIM according to the numerical analysis result, and a concrete shrinkage pressure threshold value is recorded in the concrete maintenance BIM three-dimensional model information database.

Preferably, in the above-mentioned intelligent maintenance system for large-volume concrete of foundation slab, the opening degree of the flow control solenoid valve is determined according to the ratio of the pressure detected by the capillary pressure sensor 4 to the ultimate tensile strength of concrete, and the water-feeding submersible pump and the flow control solenoid valve 38 are closed after the plastic shrinkage pressure of concrete is reduced to normal.

Preferably, in the above-mentioned intelligent maintenance system for large-volume concrete of foundation slab, when the pressure detected by the capillary pressure sensor 4 reaches a certain proportion of the ultimate tensile strength of concrete, for example, 90%, the opening of the flow control solenoid valve is controlled by 30%, and when the pressure detected by the capillary pressure sensor 4 increases by 5%, the opening of the flow control solenoid valve is increased by 30%, the watering amount is increased, and the concrete shrinkage pressure is accelerated to be reduced, until the pressure detected by the capillary pressure sensor 4 returns to below 80% of the ultimate tensile strength of concrete, the water supply submersible pump and the flow control solenoid valve 38 are closed.

In conclusion, the foundation slab large-volume concrete intelligent maintenance system provided by the invention can automatically position, plan the tail end path and intelligently control, and solves the problems that maintenance work in the prior art is mostly finished by the experience of workers, the shrinkage stress of a high shrinkage area is difficult to reduce in a targeted manner, a large amount of manpower and water resources are wasted, and the construction maintenance quality is difficult to ensure.

With reference to fig. 1 to fig. 2, the present embodiment discloses an intelligent maintenance method for mass concrete of a foundation slab, which adopts the above-mentioned intelligent maintenance method system for mass concrete of a foundation slab, and the method includes the following steps:

step 1, erecting a walking track 2 above a foundation slab 1 to be poured, arranging a plurality of curing devices 3 on the walking track 2, wherein each curing device 3 can walk on the walking track 2;

step 2, establishing a concrete curing BIM three-dimensional model information database according to the peripheral structure of the foundation slab 1, the shapes and the sizes of the foundation slab 1, the walking rails 2 and the curing devices 3 and the position relation of the peripheral structure of the foundation slab 1, the walking rails 2 and the curing devices 3 relative to the foundation slab 1;

step 3, converting a to-be-poured base plate BIM model in a concrete curing BIM three-dimensional model information database into a large-volume concrete stress distribution numerical simulation analysis model, performing stress analysis, respectively arranging capillary pressure sensors 4 in crack sensitive areas with more structural constraint or stress concentration or large stress gradient according to numerical analysis results in the to-be-poured base plate BIM model, numbering the capillary pressure sensors 4, acquiring coordinates of the capillary pressure sensors 4 and inputting concrete shrinkage pressure thresholds corresponding to areas where the coordinates are located;

step 4, detecting the plastic shrinkage pressure of the concrete in real time through the capillary pressure sensor 4, acquiring the serial number of the capillary pressure sensor when the pressure measured by the capillary pressure sensor 4 is higher than the corresponding concrete shrinkage pressure threshold value by a certain proportion, acquiring the coordinate information of the capillary pressure sensor 4 through a BIM automatic positioning system, acquiring the coordinate information of the curing device 3 in real time based on a GPS positioning system and converting the coordinate information into the coordinate of a concrete curing BIM three-dimensional model information database, and matching the coordinate of the capillary pressure sensor 4 with all curing devices 3 to obtain the coordinates of all the curing devices 3 nearby;

step 5, determining running paths of all nearby maintenance devices 3 reaching the area where the capillary pressure sensor 4 is located according to the coordinates of the maintenance devices 3 and a guide rail model in a concrete maintenance BIM three-dimensional model information database, performing three-dimensional simulation on the determined running paths, and selecting the maintenance devices 3, wherein the selected running paths of the maintenance devices 3 do not collide with the existing structure and the running paths reaching the area where the capillary pressure sensor 4 is located are the shortest;

and 6, after the selected maintenance device 3 reaches the area where the capillary pressure sensor 4 is located, adjusting the spray header 35 on the adjustable bent branch pipe 34 to the position above the area to be sprayed, stopping, starting the corresponding water supply submersible pump 32, simultaneously opening the flow control electromagnetic valve 38 on the adjustable bent branch pipe 34, and closing the corresponding water supply submersible pump 32 and the flow control electromagnetic valve 38 after the plastic shrinkage pressure of the concrete in the area where the capillary pressure sensor 4 is located is reduced to be normal.

The concrete curing BIM three-dimensional model information database is established by arranging the walking track 2 and the curing device 3, respectively arranging the capillary pressure sensors 4 in crack sensitive areas with more structural constraint or stress concentration or large stress gradient, acquiring the coordinates of each capillary pressure sensor 4 and inputting the concrete shrinkage pressure threshold value corresponding to the area where each coordinate is located, wherein the concrete shrinkage pressure threshold value represents the ultimate tensile strength of concrete; when the pressure measured by the capillary pressure sensor 4 is higher than the corresponding concrete shrinkage pressure threshold value by a certain proportion, acquiring the serial number of the capillary pressure sensor 4, acquiring the coordinate information of the capillary pressure sensor 4 through a BIM automatic positioning system, acquiring the coordinate information of the curing device 3 in real time based on a GPS (global positioning system) positioning system, converting the coordinate information into the coordinate of a concrete curing BIM three-dimensional model information database, and matching the coordinate of the capillary pressure sensor 4 with all the curing devices 3 to obtain the coordinates of all the curing devices 3 nearby; determining running paths of all nearby curing devices 3 reaching the area where the capillary pressure sensor 4 is located according to the coordinates of the curing devices 3 and a guide rail model in a concrete curing BIM three-dimensional model information database, performing three-dimensional simulation on the determined running paths, and selecting the curing devices 3, wherein the running paths of the selected curing devices 3 do not collide with the existing structure and the running paths reaching the area where the capillary pressure sensor 4 is located are the shortest; after the selected curing device 3 reaches the area where the capillary pressure sensor 4 is located, the spray header 35 on the adjustable bent branch pipe 34 is adjusted to be above the area to be sprayed, the selected curing device is stopped, the corresponding water supply submersible pump 32 is started, meanwhile, the flow control electromagnetic valve 38 on the adjustable bent branch pipe 34 is opened, after the concrete plastic shrinkage pressure of the area where the capillary pressure sensor 4 is located is reduced to be normal, the corresponding water supply submersible pump 32 and the flow control electromagnetic valve 38 are closed, and therefore, according to the method, the flow control electromagnetic valve 38 can be controlled to be opened and closed according to the pressure change feedback value generated when the concrete surface is in plastic cracking risk, large-size concrete slab curing is automatically performed, concrete curing efficiency is improved, curing labor cost is reduced, and compared with the traditional method, water consumption is effectively saved and construction cost is reduced through spraying according to needs.

Preferably, in the method for intelligently maintaining the large-volume concrete of the foundation slab, the pressure sensors 4 of the capillary transmit the detected pressure generated by the surface shrinkage of the concrete to the data acquisition unit in a wireless signal mode, and the data is transmitted in a wireless mode, so that the constraint of a cable can be eliminated, and the method has the advantages of convenience in maintenance and strong capacity expansion capability.

Preferably, in the above-mentioned intelligent maintenance method for the large-volume concrete of the foundation slab, each maintenance device 3 includes a box 30, a reservoir 31, a water-feeding submersible pump 32, a water-feeding main pipe 33, adjustable bent branch pipes 34, a spray header 35 and a servo motor, the bottom of the box 30 is provided with a plurality of rollers 39, the servo motor drives the rollers 39 to move on the walking track 2, the water-feeding submersible pump 32 is installed in the reservoir 31, one end of the water-feeding main pipe 33 is connected with the water-feeding submersible pump 32, the other end is connected with the adjustable bent branch pipes 34 uniformly distributed in six directions through water-distributing joints, the water-feeding main pipe 33 is provided with a control main valve 37, and each adjustable bent branch pipe is provided with a respective flow control electromagnetic valve 38. When the curing device 3 reaches the area to be sprayed, where the pressure detected by the capillary pressure sensor 4 exceeds the standard, the water supply submersible pump 32 is started, and the control main valve 37 and the flow control electromagnetic valves 38 on the corresponding adjustable bent branch pipes 34 are opened, so that the concrete is cured effectively in time and prevented from cracking.

Preferably, in the above intelligent maintenance method for the large-volume concrete of the foundation slab, the BIM automatic positioning system, the control main valve 37, the flow control electromagnetic valve 38, the servo motor and the water supply submersible pump 32 are respectively connected with a control system and controlled by the control system, so as to realize the automatic intelligent maintenance of the large-volume concrete of the foundation slab, improve the concrete maintenance efficiency and reduce the maintenance labor cost.

Preferably, in the above method for intelligently curing the large-volume concrete of the foundation slab, the opening of the flow control solenoid valve 39 is determined according to the ratio of the pressure detected by the capillary pressure sensor 4 to the ultimate tensile strength of the concrete. For example, when the pressure detected by the capillary pressure sensor 4 reaches a certain proportion (e.g. 90%) of the ultimate tensile strength of the concrete, the flow control solenoid valve is controlled to open a certain valve opening degree (e.g. 30%), and when the pressure detected by the capillary pressure sensor 4 increases by a certain amplitude (e.g. 5%), the flow control solenoid valve is increased by 30% until the detected pressure recovers to be below 80% of the ultimate tensile strength of the concrete, the water supply submersible pump 32 and the flow control solenoid valve 38 are closed, and the flow control solenoid valve 38 is controlled to realize timely and accurate maintenance of the concrete.

In conclusion, the intelligent maintenance method for the large-volume concrete of the foundation slab, provided by the invention, can realize automatic positioning, tail end path planning and intelligent control, and solves the problems that maintenance work in the prior art is mostly finished by worker experience, the shrinkage stress of a high shrinkage area is difficult to reduce in a targeted manner, a large amount of manpower and water resource waste exists, and the construction maintenance quality is difficult to ensure.

The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the appended claims.