CN111174929A - Automatic identification method for mold-entering temperature of mass concrete - Google Patents
Automatic identification method for mold-entering temperature of mass concrete Download PDFInfo
- Publication number
- CN111174929A CN111174929A CN202010276992.6A CN202010276992A CN111174929A CN 111174929 A CN111174929 A CN 111174929A CN 202010276992 A CN202010276992 A CN 202010276992A CN 111174929 A CN111174929 A CN 111174929A
- Authority
- CN
- China
- Prior art keywords
- temperature
- data
- temperature measuring
- mold
- concrete
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 11
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 9
- 238000009415 formwork Methods 0.000 claims abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 38
- 239000010959 steel Substances 0.000 claims description 38
- 230000005540 biological transmission Effects 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 8
- 238000013500 data storage Methods 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 6
- 238000005538 encapsulation Methods 0.000 claims description 5
- 238000004806 packaging method and process Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000036571 hydration Effects 0.000 description 3
- 238000006703 hydration reaction Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000003908 quality control method Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004861 thermometry Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
- G01K13/10—Thermometers specially adapted for specific purposes for measuring temperature within piled or stacked materials
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention discloses a method for automatically identifying the mold-entering temperature of mass concrete, which comprises the following steps: step one, after the large-volume concrete reinforcing steel bars are bound and the formwork erection is finished, the large-volume concrete reinforcing steel bars are bound and erectedMThe temperature measuring device is fixed in the reinforcing mesh; secondly, connecting the temperature measuring device to a data acquisition device, acquiring temperature data of the temperature sensor by the data acquisition device according to a preset frequency, and transmitting the data to a server; thirdly, according to the first formula and the second formula, primarily judgingf j The mold-in temperature; fourthly, checking and confirming according to the third formulaf j Whether it is the mold-in temperature. The method can automatically calculate the concrete mold-entering temperature and the mold-entering time of each temperature measuring device according to the series of temperature data monitored by the temperature measuring devices, and greatly improves the working efficiency.
Description
Technical Field
The invention relates to a method for automatically identifying the mold-entering temperature of mass concrete, and belongs to the technical field of mass concrete construction.
Background
The modern buildings often involve mass concrete construction, such as high-rise building foundations, large equipment foundations, water conservancy dams and the like. The concrete mold-entering temperature is an important parameter for controlling the mass concrete quality, and according to the concrete quality control standard (GB 50164-92) item 4.3.6: the temperature of the concrete mixture when the concrete mixture is conveyed to a pouring site is not higher than 35 ℃ at most and not lower than 5 ℃ at least.
The mold-entering temperature of the mass concrete is influenced by a series of factors such as the mix proportion, the transportation time, the outdoor temperature, the construction process and the like, and great uncertainty exists. At present, the temperature measurement system does not perform fine management on the mold-entering temperature, usually, manual identification is adopted for recording, and the mode of manually identifying the mold-entering time of all pouring points is time-consuming and labor-consuming due to the fact that large-volume concrete pouring areas are large and pouring time is long.
The difference between the temperature of the position 40 mm-80 mm inside the surface of the concrete structural member and the temperature inside the concrete structural member is not more than 25 ℃ and the difference between the temperature of the surface of the concrete structural member and the temperature of the surface of the concrete structural member is not more than 25 ℃ according to the specification of concrete structural engineering (GB 50666-2011) No. 8.7.3-2. Therefore, when large-volume concrete is poured, a plurality of temperature sensors are often buried in the concrete to measure the temperature of the concrete, so as to control the temperature difference. How to automatically and accurately determine the mold-entering temperature of the mass concrete by utilizing the embedded temperature sensor has important significance on the quality control of the concrete.
Disclosure of Invention
The invention provides an automatic identification method for the mold-entering temperature of mass concrete, aiming at the problem that the manual identification mode of the mold-entering time of all pouring points wastes time and labor in mass concrete construction, and greatly improving the working efficiency.
In order to solve the technical problems, the invention comprises the following technical scheme:
a method for automatically identifying the mold-entering temperature of mass concrete comprises the following steps:
step one, after the large-volume concrete reinforcing steel bars are bound and the formwork erection is finished, the large-volume concrete reinforcing steel bars are bound and erectedMThe temperature measuring device is fixed in the reinforcing mesh;
secondly, connecting the temperature measuring device to a data acquisition device, acquiring temperature data of the temperature sensor by the data acquisition device according to a preset frequency, and transmitting the data to a server;
third step, according tonMonitoring data of temperature measuring device (t 1,f 1), (t 2,f 2), …,(t i-1,f i-1), (t i , f i ) If (a), (b) ist j ,f j ) If the formula I and the formula II are satisfied, the preliminary judgment is madef j The mold-in temperature;
t k andf k respectively representnThe first of the temperature measuring devicekThe time and temperature of the secondary data is monitored, wherein,n= 1, 2, …M；k= 1, 2, …i；t 1<t 2<…t i-1<t i ；
Wherein,Xchecking and confirming the number of required data for the concrete mold entering, wherein the number is a preset constant;
Wherein,a= 1, 2, …A，f j+a is composed off j After thataThe temperature data, Q, is the self-accuracy of the temperature measuring device,βin order to set the coefficients for the purpose of,β>1; a is a preset constant;
the fourth step, ift j F times of data after E hours (t Ey ,f Ey ) If all satisfy the formula three, checking and confirmingf j The mold-in temperature; if it ist j F times of data after E hours (t Ey ,f Ey ) If the formula three is not completely satisfied, checking and confirmingf j If not, repeating the third step and the fourth step to determine the mold-entering temperature and the mold-entering time again;
Furthermore, the temperature measuring devices adopt serial temperature measuring devices, each serial temperature measuring device comprises a plurality of temperature measuring devices which are packaged on the data line and connected in series, and each temperature measuring device comprises a temperature sensor, a thin-wall steel sleeve, a filling material, a rubber pad and a heat-shrinkable sleeve; the data line comprises 3 core wires packaged in the skin, wherein two of the 3 core wires are power supply lines, and one is a data acquisition line; the outer skin of the data wire at the packaging part is disconnected, and 3 pins of the temperature sensor are respectively connected with 3 core wires of the data wire; the thin-wall steel sleeve is sleeved on the core wire and the temperature sensor at the encapsulation part, and the filling material is arranged in the thin-wall steel sleeve; two ends of the thin-wall steel sleeve are overlapped on the outer skin of the data line, the rubber pad is arranged at the joint of the thin-wall steel sleeve and the outer skin of the data line, and two ends of the heat-shrinkable sleeve are respectively sleeved on the outer skin of the data line and the end part of the thin-wall steel sleeve; a plurality of temperature measuring points are distributed in a pouring area of the large-volume concrete, and each temperature measuring point is provided with a serial temperature measuring device along the thickness direction of the large-volume concrete.
Further, fixing the serial temperature measuring device on a temperature measuring device bracket; the temperature measuring device support comprises a support base and a vertical rod arranged on the support base, the support base is hinged with the bottom end of the vertical rod, and the hinged point is close to one end of the support base; a plurality of short transverse rods for fixing the series-connected temperature measuring devices are arranged on the vertical rod at intervals; a core wire of the data line at the temperature measuring device is parallel to the short cross rod;
after the large-volume concrete steel bars are bound and the formwork erection is finished, a plurality of temperature measuring device supports provided with the series-type temperature measuring devices are vertically placed into the steel bar mesh according to a preset interval, the supporting base is supported on the bottom steel bars, and the vertical bars are fixed on the upper steel bars.
Further, after the fourth step, the method further comprises:
fifthly, drawing a three-dimensional graph of the large-volume concrete constraint boundary and the arrangement space position of the temperature measuring device, and checking the corresponding confirmed mold-entering temperature according to the fourth stepf j Corresponding tot j Connecting temperature measuring devices with the same mold-entering time in a three-dimensional graph to form a concrete pouring surface, and confirming the concrete pouring surface and the constraint boundary of the mass concretet j The concrete pouring amount is accumulated in time.
Further, a data storage module is arranged in the data acquisition device, and corresponding data are deleted after the data transmission is successful; if the data transmission is unsuccessful, the data is stored in the data storage module, when the data transmission is carried out for the next time, the latest acquisition data is transmitted to the server firstly, then the stored data which is not successfully transmitted is transmitted to the server when the network is idle, and the data transmitted by the data acquisition device comprises the serial number of the temperature sensor, the temperature data and the temperature acquisition time.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages and positive effects:
(1) according to the automatic identification method for the mold-entering temperature of the mass concrete, the mold-entering temperature and the mold-entering time of the concrete at each temperature measuring device can be automatically calculated according to series of temperature data monitored by the temperature measuring devices, so that the working efficiency is greatly improved;
(2) the concrete mold-entering temperature and the mold-entering time are important parameters for controlling the mass concrete quality, and can be used for calculating the engineering quantity of the concrete, so that the accuracy of the engineering quantity calculation is improved, and the calculation workload is simplified;
(3) the temperature measuring devices are packaged on the data lines, the formed serial temperature measuring devices have the advantages of high temperature resistance, damage resistance, interference resistance, short circuit resistance and the like, and the plurality of temperature measuring devices are packaged on one data line, so that the workload of data line arrangement can be reduced, and the construction efficiency is improved; in addition, the temperature measuring device bracket is adopted to fix the serial temperature measuring device, the advantages of uniform distribution of temperature measuring points, convenient operation and the like are achieved, the vertically arranged temperature measuring device is changed into the horizontally arranged temperature measuring device, the temperature measuring error can be reduced, and the measuring precision is effectively improved.
Drawings
FIG. 1 is a flow chart of a method for automatically identifying the mold-entering temperature of mass concrete according to the present invention;
FIG. 2 is a schematic diagram of a data line and a temperature measuring device according to the present invention;
FIG. 3 is a schematic diagram of the package of the temperature measuring device of the present invention;
FIG. 4 is a front view of a temperature measuring device mount of the present invention;
FIG. 5 is a side view of a temperature measuring device mount of the present invention;
FIG. 6 is a view showing a state of use of a bracket for a temperature measuring device according to the present invention;
the numbers in the figures are as follows:
1-reinforcing steel bars;
10-a temperature measuring device support; 11-a support base; 12-a vertical rod; 13-short cross bar; 14-a rotating shaft; 15-fastening bolts;
20-a data line; 21-outer skin; 22-a core wire;
30-a temperature measuring device; 31-a temperature sensor; 32-thin-walled steel sleeves; 33-a filler material; 34-a rubber pad; 35-heat shrink tubing.
Detailed Description
The method for automatically identifying the mold-entering temperature of mass concrete provided by the invention is further described in detail with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent in conjunction with the following description. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.
Example one
As shown in fig. 1, the method for automatically identifying the mold-entering temperature of mass concrete provided by this embodiment includes the following steps:
step one, after the large-volume concrete reinforcing steel bars are bound and the formwork erection is finished, the large-volume concrete reinforcing steel bars are bound and erectedMA temperature measuring device is fixed in the reinforcing mesh.
The temperature measuring device is used for measuring the temperature of mass concrete, a plurality of monitoring points are usually arranged, and a plurality of temperature measuring devices are arranged at each monitoring point along the depth direction of the concrete.
And secondly, connecting the temperature measuring device to a data acquisition device, acquiring temperature data of the temperature sensor by the data acquisition device according to preset frequency, and transmitting the data to a server.
The data collection device may be a plc controller, a smart meter, or the like, but is not limited thereto. And the server is internally provided with mass concrete temperature monitoring software for receiving the data transmitted by the data acquisition device and taking temperature control measures for mass concrete.
Before the concrete is put into the mold, the temperature value monitored by the temperature measuring device is the ambient temperature, and after the concrete is put into the mold, the internal temperature of the concrete is monitored by the temperature measuring device. The server stores a series of temperature data of each temperature measuring device, including a plurality of environmental temperature data before mold entering and a plurality of environmental temperature data after mold entering.
The preferred embodiment is that a data storage module is arranged in the data acquisition device, and corresponding data is deleted after the data transmission is successful; if the data transmission is unsuccessful, for example, under the condition of network failure, the data is stored in the data storage module, firstly the latest acquired data is transmitted to the server, then the stored data which is not successfully transmitted is transmitted to the server when the network is idle, and the data transmitted by the data acquisition device comprises the serial number of the temperature sensor, the temperature data and the temperature acquisition time. According to the embodiment, when data transmission is in a problem, the accuracy and the integrity of the data transmission can be still ensured, and the data transmission can be realized only by a small memory.
Third step, according tonMonitoring data of temperature measuring device (t 1,f 1), (t 2,f 2), …,(t i-1,f i-1),(t i ,f i ) If (a), (b) ist j ,f j ) If the formula I and the formula II are satisfied, the preliminary judgment is madef j The mold-in temperature;
wherein,t k andf k respectively representnThe first of the temperature measuring devicekThe time and temperature of monitoring of the secondary data,n= 1, 2, …M；k= 1, 2, …i；t 1<t 2<…t i-1<t i ；
Wherein,Xchecking and confirming required data for concrete mold entering, wherein the data is a preset constant;
Wherein,a= 1, 2, …A，f j+a is composed off j After thataThe temperature data, Q, is the self-accuracy of the temperature measuring device,βin order to set the coefficients for the purpose of,β>1; a is a preset constant.
It should be noted that the concrete setting includes initial setting and final setting, the initial setting means that the concrete begins to set after losing a plastic state, the initial setting time of the concrete is usually not more than 6 hours, the hydration heat reaction begins after the initial setting of the concrete is accompanied with heat release, and the external manifestation is that the temperature of the concrete begins to rise gradually. The concrete can be poured before initial setting, the temperature is extremely stable in the period from pouring to initial setting, and the external appearance is that the temperature is not changed.
When the concrete is poured, when the temperature measuring point is covered by the concrete, the concrete is poured into the mold at the temperature measuring point, the temperature of the concrete is measured at the moment, the temperature of the concrete is the pouring temperature of the concrete, and the time point is the pouring time of the temperature measuring point. The concrete mold-entering temperature plays an extremely important role in judging whether the concrete meets the specification, and the concrete construction specification requires that the concrete mold-entering temperature is not less than 5 ℃, not more than 30 ℃ and the highest temperature rise is not more than 50 ℃.
The large-size concrete needs to be transported to a construction site through the transporting device and then is poured through the concrete pump truck, so that the temperature of the concrete is different from the air temperature before pouring, and when the concrete enters a mold, the temperature monitoring device monitors the temperature, the ambient temperature is rapidly changed into the concrete temperature, and the temperature mutation exists. In the formula I, the first step is carried out,
、
indicating the temperature measuring device att j-1、t j Time andt j-2、t j-1the rate of temperature rise at that time;
the temperature rise rate is inconsistent before and after the concrete is poured into the mould, and the temperature rise rate is changed possibly due to the fact that the concrete is poured into the mould.
In the second formula, Q is the self-accuracy of the temperature measuring device, and concrete pouring is usually controlled at least 2 hours before initial setting, so that the temperature data measured by the temperature measuring device is basically kept constant within at least 120 minutes after the concrete is poured into a mold.f j+a To representf j Then it is firstaThe temperature data of the temperature data,
to representf j Then it is firstaTemperature data andf j the difference between the difference values of the two values,βin order to set the coefficient, Q is the self-precision of the temperature measuring device,βq is temperature measuring deviceOf self-accuracyβAnd (4) doubling. Such as Q =0.1 ℃;βin order to set the coefficients for the purpose of,β>1, in order to avoid the influence of the self precision of the temperature measuring device on the result,βit is not preferable that the value is too small, and in order to avoid a deviation in the determination result,βit is not suitable for the patient to be too large,βthe preferable value interval is [1.5, 3 ]]E.g. by takingβ=2。f j+A To representf j Then it is firstAA temperature data corresponding to a time of dayt j+A It is preferable that,
minute, i.e. the temperature data selected in formula two ist j If the time interval of the temperature measuring frequency is 30 minutes, the data within the next two hours can be A = 4; if the interval of the thermometry frequency is 15 minutes, then A =6, 7 or 8 is preferred. If it is
Then representsf j The monitored temperature was substantially constant over the next two hours. Therefore, the formula I is combined with the formula II to preliminarily determinef j The mold-in temperature.
The fourth step, ift j F times of data after E hours (t Ey ,f Ey ) If all satisfy the formula three, checking and confirmingf j The mold-in temperature; if it ist j F times of data after E hours (t Ey ,f Ey ) If the formula three is not completely satisfied, checking and confirmingf j If not, determining the mold-entering temperature again according to the steps;
E is a predetermined constant determined by the initial setting time of the concrete, e.g. the initial setting of the concreteThe setting time is 6 hours, the concrete needs to be transported to a construction area and poured, then 6 hours are carried out after the concrete is placed in a mold, the concrete is initially set, the concrete enters a hydration heat reaction rapid heating stage, and F times of data after 6 hours are obtained, the heating rate is sequentially increased, and the requirement of meeting the requirement of the temperature rise of the concrete after the concrete enters a hydration heat reaction rapid heating stage is met
. Thus, the formula III further verifiest j Whether the data after E hours is in a rapid temperature rise state or not is checked (t j ,f j ) Whether it is the mold-in time and the mold-in temperature.
For example, E =6 hours, and the sequential data are acquired at intervals of 30 minutes, and then there are 12 data in 6 hours; f =10 times, the mold-entering time and the mold-entering temperature need to be checked and confirmed, and the mold-entering time and the mold-entering temperature need to be vacatedt j And after the moment, the value of X in the formula II needs to be greater than or equal to 22 according to 22 temperature data.
Example two
The present embodiment is a preferred implementation manner of the first embodiment, and as shown in fig. 2 and fig. 3, the temperature measuring devices adopt serial temperature measuring devices, each of the serial temperature measuring devices includes a plurality of temperature measuring devices 30 packaged on the data line 20 and connected in series, and each of the temperature measuring devices 30 includes a temperature sensor 31, a thin-walled steel sleeve 32, a rubber pad 34, and a heat shrink sleeve 35. The data line 20 comprises 3 core wires 22 packaged in the sheath 21, two of the core wires are power supply wires, one is a data acquisition wire, and the core wire of the data line at the temperature measuring device is parallel to the short cross rod. The sheath 21 of the data wire 20 at the encapsulation part is broken, 3 pins of the temperature sensor 31 are respectively connected with 3 core wires 22 of the data wire 20, the thin-wall steel sleeve 32 is sleeved on the core wires 22 at the encapsulation part and the temperature sensor 31, a filling material 33 is sealed in the thin-wall steel sleeve 32, the filling material 33 can be epoxy resin, and other flame-retardant and inert fillers can be sealed in the thin-wall steel sleeve 32. The temperature in the large-volume concrete can reach about 80 ℃, and a power supply core wire is arranged at the packaging position, so the filling material 33 is not suitable to be inflammable and conductive materials. The temperature sensor 31 is close to the thin-walled steel sleeve 32, and the thin-walled steel sleeve 32 has good thermal conductivity, so that the temperature sensor 31 can accurately measure the internal temperature of the mass concrete structure.
As shown in fig. 3, two ends of the thin-walled steel sleeve 32 overlap the sheath 21 of the data line 20, a rubber pad 34 is disposed at a joint of the thin-walled steel sleeve 32 and the sheath 21 of the data line 20, and two ends of the heat shrink sleeve 35 are respectively sleeved on the sheath 21 of the data line 20 and the end of the thin-walled steel sleeve 32. The rubber pads 34 are preferably used at both ends of the thin-walled steel sleeve 32 to provide a flexible transition from the end of the data cable to the sleeve and to prevent the outer sheath from being damaged when the data cable is bent, and therefore, the rubber pads 34 are preferably ring-shaped and have an outer diameter gradually decreasing from the end of the thin-walled steel sleeve 32 to the other end and approaching the outer diameter of the outer sheath 21 of the data cable 20. The heat-shrinkable sleeve 35 integrally encapsulates the rubber pad 34, the temperature sensor 31 and the filler 33, so as to ensure the encapsulation and sealing of the temperature sensor 31 and prevent short circuit of the line after water leakage caused by concrete pouring.
Therefore, the serial temperature measuring device adopted in the embodiment effectively encapsulates the temperature sensor 31, so that the encapsulated temperature measuring device 30 has the characteristics of good high temperature resistance, damage resistance, interference resistance, short circuit resistance and the like.
EXAMPLE III
In this embodiment, as a preferred implementation manner of the second embodiment, the serial temperature measuring devices are fixed on the temperature measuring device brackets, after the large-volume concrete steel bars are bound and the formwork erection is completed, the temperature measuring device brackets provided with the serial temperature measuring devices are vertically placed into the steel bar mesh at preset intervals, the supporting base is supported on the bottom steel bars, and the vertical bars are fixed on the upper steel bars.
Referring to fig. 4 to 6, the temperature measuring device support 10 includes a supporting base 11 and a vertical rod 12 disposed on the supporting base 11, the supporting base 11 is hinged to a bottom end of the vertical rod 12, and a hinge point is close to one end of the supporting base 11; the vertical rod 12 is provided with a plurality of short transverse rods 13 at intervals for fixing the series-connection type temperature measuring devices.
Furthermore, the both ends of supporting base 11 are provided with decurrent protruding edge, can make supporting base 11 support on the reinforcing bar better to play certain limiting displacement to supporting base 11, when avoiding concreting, under the impact of concrete, cause the great displacement of supporting base 11.
Further, the short transverse rod 13 is fixed on the vertical rod 12 through a fastening bolt 15, and the vertical distance of the short transverse rod 13 can be adjusted and fixed through the fastening bolt 15.
Furthermore, the end parts of the supporting base 11 and the vertical rod 12 are hinged by the rotating shaft 14, the position of the hinged point is not the middle point of the supporting base 11 but is deviated to one side, when the temperature measuring device support 10 is lifted upwards, one end of the supporting base 11 descends and the other end thereof ascends under the action of gravity, so that an acute angle is formed between the supporting base 11 and the vertical rod 12, and the supporting base 11 can be conveniently lowered into the grid of the steel bar 1; when supporting base 11 and transferring to bottom reinforcing bar 1, make lower one end support earlier on reinforcing bar 1, continue to transfer montant 12, make the 11 other ends of support base also support on reinforcing bar 1, fixed montant 12 and upper reinforcing bar to keep montant 12 vertical. Through the support base 11 that sets up the skew mid point of pin joint, conveniently support base 11 and transfer, simultaneously, conveniently support base 11 again and support on the bottom reinforcing bar, avoid 12 tip of montant to stretch out the bottom reinforcing bar, run through bulky concrete structure bottom.
When the temperature measuring devices 30 are specifically arranged, the temperature measuring devices 30 are horizontally arranged along the short transverse rod 13, and the data lines 20 between the temperature measuring devices 30 are vertically arranged along the vertical rods 12. If the temperature measuring device 30 is vertically arranged, the temperature of the measuring point is difficult to accurately determine due to the temperature gradient of concrete outside the thin-wall steel sleeve, the temperature measuring device 30 is transversely arranged, and the position of the measuring point can be determined according to the position of the short cross rod 13, so that the measuring accuracy is improved. The large-volume concrete has a temperature gradient in the vertical direction, and a plurality of vertically arranged temperature measuring devices 30 are connected in series for measuring the temperature difference of each measuring point of each measuring position in the vertical direction, so as to judge whether the measuring result meets the standard requirement.
Example four
In this embodiment, which is a preferred implementation manner of the first embodiment, the concrete pouring accumulated workload at a certain time point can be calculated by confirming the concrete pouring time of each temperature measuring device, and the method specifically includes the following steps:
fifthly, drawing a three-dimensional graph of the large-volume concrete constraint boundary and the arrangement space position of the temperature measuring device, and checking the corresponding confirmed mold-entering temperature according to the fourth stepf j Corresponding tot j Connecting temperature measuring devices with the same mold-entering time in a three-dimensional graph to form a concrete pouring surface, and confirming the concrete pouring surface and the constraint boundary of the mass concretet j The concrete pouring amount is accumulated in time. The temperature measuring devices with the same concrete mold-entering time are adjacently connected together to form a net structure of a concrete pouring surface, the net structure can be smoothly processed through drawing software to form a smooth surface, and the software can automatically calculate the volume of a space between the lower surface of the surface and a constraint boundary, namely the volume of the concrete poured at the moment.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (5)
1. A method for automatically identifying the mold-entering temperature of mass concrete is characterized by comprising the following steps:
step one, after the large-volume concrete reinforcing steel bars are bound and the formwork erection is finished, the large-volume concrete reinforcing steel bars are bound and erectedMThe temperature measuring device is fixed in the reinforcing mesh;
secondly, connecting the temperature measuring device to a data acquisition device, acquiring temperature data of the temperature sensor by the data acquisition device according to a preset frequency, and transmitting the data to a server;
third step, according tonMonitoring data of temperature measuring device (t 1,f 1), (t 2,f 2), …,(t i-1,f i-1), (t i , f i ) If (a), (b) ist j ,f j ) If the formula I and the formula II are satisfied, the preliminary judgment is madef j The mold-in temperature;
t k andf k respectively representnThe first of the temperature measuring devicekThe time and temperature of the secondary data is monitored, wherein,n= 1, 2, …M；k= 1, 2, …i；t 1<t 2<…t i-1<t i ；
Wherein,Xchecking and confirming the number of required data for the concrete mold entering, wherein the number is a preset constant;
Wherein,a= 1, 2, …A，f j+a is composed off j After thataThe temperature data, Q, is the self-accuracy of the temperature measuring device,βin order to set the coefficients for the purpose of,β>1; a is a preset constant;
the fourth step, ift j F times of data after E hours (t Ey ,f Ey ) If all satisfy the formula three, checking and confirmingf j The mold-in temperature; if it ist j F times of data after E hours (t Ey ,f Ey ) If the formula three is not completely satisfied, checking and confirmingf j If not, repeating the third step and the fourth step to determine the mold-entering temperature and the mold-entering time again;
2. The method for automatically identifying the mold-entering temperature of the mass concrete according to claim 1, wherein the temperature measuring devices are serial temperature measuring devices, each serial temperature measuring device comprises a plurality of temperature measuring devices which are packaged on a data line and connected in series, and each temperature measuring device comprises a temperature sensor, a thin-wall steel sleeve, a filling material, a rubber pad and a heat-shrinkable sleeve; the data line comprises 3 core wires packaged in the skin, wherein two of the 3 core wires are power supply lines, and one is a data acquisition line; the outer skin of the data wire at the packaging part is disconnected, and 3 pins of the temperature sensor are respectively connected with 3 core wires of the data wire; the thin-wall steel sleeve is sleeved on the core wire and the temperature sensor at the encapsulation part, and the filling material is arranged in the thin-wall steel sleeve; two ends of the thin-wall steel sleeve are overlapped on the outer skin of the data line, the rubber pad is arranged at the joint of the thin-wall steel sleeve and the outer skin of the data line, and two ends of the heat-shrinkable sleeve are respectively sleeved on the outer skin of the data line and the end part of the thin-wall steel sleeve; a plurality of temperature measuring points are distributed in a pouring area of the large-volume concrete, and each temperature measuring point is provided with a serial temperature measuring device along the thickness direction of the large-volume concrete.
3. The method for automatically identifying the mold-entering temperature of mass concrete according to claim 2,
fixing the serial temperature measuring device on a temperature measuring device bracket; the temperature measuring device support comprises a support base and a vertical rod arranged on the support base, the support base is hinged with the bottom end of the vertical rod, and the hinged point is close to one end of the support base; a plurality of short transverse rods for fixing the series-connected temperature measuring devices are arranged on the vertical rod at intervals; a core wire of the data line at the temperature measuring device is parallel to the short cross rod;
after the large-volume concrete steel bars are bound and the formwork erection is finished, a plurality of temperature measuring device supports provided with the series-type temperature measuring devices are vertically placed into the steel bar mesh according to a preset interval, the supporting base is supported on the bottom steel bars, and the vertical bars are fixed on the upper steel bars.
4. The method for automatically identifying the mold-entering temperature of mass concrete according to claim 2, wherein after the fourth step, the method further comprises:
fifthly, drawing a three-dimensional graph of the large-volume concrete constraint boundary and the arrangement space position of the temperature measuring device, and checking the corresponding confirmed mold-entering temperature according to the fourth stepf j Corresponding tot j Connecting temperature measuring devices with the same mold-entering time in a three-dimensional graph to form a concrete pouring surface, and confirming the concrete pouring surface and the constraint boundary of the mass concretet j The concrete pouring amount is accumulated in time.
5. The method for automatically identifying the mold-entering temperature of mass concrete according to claim 1,
a data storage module is arranged in the data acquisition device, and corresponding data are deleted after the data are successfully transmitted; if the data transmission is unsuccessful, the data is stored in the data storage module, when the data transmission is carried out for the next time, the latest acquisition data is transmitted to the server firstly, then the stored data which is not successfully transmitted is transmitted to the server when the network is idle, and the data transmitted by the data acquisition device comprises the serial number of the temperature sensor, the temperature data and the temperature acquisition time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010276992.6A CN111174929B (en) | 2020-04-10 | 2020-04-10 | Automatic identification method for mold-entering temperature of mass concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010276992.6A CN111174929B (en) | 2020-04-10 | 2020-04-10 | Automatic identification method for mold-entering temperature of mass concrete |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111174929A true CN111174929A (en) | 2020-05-19 |
| CN111174929B CN111174929B (en) | 2020-07-10 |
Family
ID=70648564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010276992.6A Active CN111174929B (en) | 2020-04-10 | 2020-04-10 | Automatic identification method for mold-entering temperature of mass concrete |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111174929B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111339603A (en) * | 2020-05-19 | 2020-06-26 | 上海建工集团股份有限公司 | Large-volume concrete temperature value prediction and control method |
| CN113325798A (en) * | 2021-07-08 | 2021-08-31 | 宜科(天津)电子有限公司 | Sensor data processing system |
| CN116026723A (en) * | 2023-02-13 | 2023-04-28 | 南京中建八局智慧科技有限公司 | Concrete comprehensive detection equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003145576A (en) * | 2001-11-12 | 2003-05-20 | Kanto Auto Works Ltd | Molding processing method for thermoplastic resin and molding apparatus therefor |
| CN108061612A (en) * | 2017-12-26 | 2018-05-22 | 上海建工集团股份有限公司 | A kind of mass concrete temperature detection device |
| CN108133111A (en) * | 2017-12-29 | 2018-06-08 | 中铁十二局集团有限公司 | A kind of Study on Temperature Field method and temprature control method based on mass concrete |
| CN108981966A (en) * | 2018-07-02 | 2018-12-11 | 雷元新 | A kind of mass concrete temperature gradient Analysis of Limit Value method and device |
-
2020
- 2020-04-10 CN CN202010276992.6A patent/CN111174929B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003145576A (en) * | 2001-11-12 | 2003-05-20 | Kanto Auto Works Ltd | Molding processing method for thermoplastic resin and molding apparatus therefor |
| CN108061612A (en) * | 2017-12-26 | 2018-05-22 | 上海建工集团股份有限公司 | A kind of mass concrete temperature detection device |
| CN108133111A (en) * | 2017-12-29 | 2018-06-08 | 中铁十二局集团有限公司 | A kind of Study on Temperature Field method and temprature control method based on mass concrete |
| CN108981966A (en) * | 2018-07-02 | 2018-12-11 | 雷元新 | A kind of mass concrete temperature gradient Analysis of Limit Value method and device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111339603A (en) * | 2020-05-19 | 2020-06-26 | 上海建工集团股份有限公司 | Large-volume concrete temperature value prediction and control method |
| CN113325798A (en) * | 2021-07-08 | 2021-08-31 | 宜科(天津)电子有限公司 | Sensor data processing system |
| CN116026723A (en) * | 2023-02-13 | 2023-04-28 | 南京中建八局智慧科技有限公司 | Concrete comprehensive detection equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111174929B (en) | 2020-07-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111174929B (en) | Automatic identification method for mold-entering temperature of mass concrete | |
| JP5945231B2 (en) | Pile detection device and method of using the same | |
| CN102323396B (en) | Solid simulation test device for mass concrete and test construction method thereof | |
| CN106584654A (en) | Production process for prefabricated reinforced concrete duct pieces | |
| CN110056189B (en) | Method for monitoring and controlling large-volume concrete construction by using Internet of things | |
| CN108643247B (en) | Testing device and testing method for soil body reinforcement model at bottom of rectangular foundation pit in soft soil area | |
| CN112064686B (en) | Method for monitoring opening amount of immersed tube tunnel joint | |
| CN105464010A (en) | Concrete box culvert construction method and system based on automatic transportation | |
| CN117538083A (en) | Model test method for tunnel multilayer support structure | |
| CN107859039A (en) | A kind of temperature difference control of coal mill foundations mass concrete and detection method | |
| CN207703261U (en) | A kind of distribution dynamic monitoring device of mass concrete | |
| CN207689039U (en) | For distribution optical fiber sensor during mass concrete casting and constructing | |
| CN116718629A (en) | Monitoring system of prestressed concrete lining | |
| CN202119771U (en) | Mass concrete entity simulation test device | |
| CN103362151B (en) | Method for detecting prestress concrete pipe pile horizontal stress | |
| CN108181347B (en) | Slideway type concrete thermal expansion coefficient measuring device and measuring method | |
| CN113882344B (en) | Method for preventing long intermittent crack of gate chamber bottom plate and gate wall | |
| JPH0241625B2 (en) | ||
| CN118294233A (en) | Concrete defect void detection model and manufacturing method thereof | |
| CN117661869A (en) | Large-volume concrete temperature sensor fixing device and construction method thereof | |
| CN117605147A (en) | Construction method of circular pool | |
| CN117418681A (en) | 3D printing construction method for linear structure of transformer substation | |
| CN117685019A (en) | Box tunnel construction technology | |
| CN117367646A (en) | Concrete stress redundancy monitoring system and stress calculation method based on strain gauge group and reinforcing steel bar meter | |
| CN113738064A (en) | Structural terrace heat insulation structure and construction method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |