CN114329703A - Early warning method for template side pressure and pouring speed in pouring process of bridge pier body - Google Patents
Early warning method for template side pressure and pouring speed in pouring process of bridge pier body Download PDFInfo
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- CN114329703A CN114329703A CN202111583433.0A CN202111583433A CN114329703A CN 114329703 A CN114329703 A CN 114329703A CN 202111583433 A CN202111583433 A CN 202111583433A CN 114329703 A CN114329703 A CN 114329703A
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Abstract
The embodiment of the application provides a method for early warning of template side pressure and pouring speed in a pouring process of a bridge pier body, and relates to the field of bridge construction. The method comprises the following steps: acquiring the strain of a monitoring point; calculating the pressure of a monitoring point according to the strain; according to the pressure, calculating the pouring speed of the monitoring point; and pouring early warning is carried out on the bridge pier body according to the pressure and the pouring speed. The method for calculating the pouring speed and the pouring pressure by monitoring the strain of the template outside the bridge pier body template can improve the problem that the accuracy of the speed of pouring concrete of the current monitoring bridge pier body is not high, a monitoring instrument can cause certain damage to the template, safety accidents easily occur in the construction process, the accuracy of the speed of pouring concrete of the current monitoring bridge pier body is improved, the damage of the monitoring instrument to the template is reduced, and the effect of safe construction is maintained.
Description
Technical Field
The embodiment of the application relates to the technical field of bridge construction, in particular to an early warning method for template side pressure and pouring speed in the pouring process of a bridge pier body.
Background
At present, China is in a high-speed development situation, and bridge and overhead construction is in progress fiercely. According to the project management method of partial projects with high risk, the construction of the concrete formwork support with the height of more than 5m belongs to projects with high risk. In the concrete pouring process, if horizontal and vertical deviation exists in the template, the construction quality and safety of the high buttress are affected, and accidents such as expansion and mold explosion can be caused in severe cases. At present, pour the in-process at the bridge pier shaft, generally adopt laser range finder and pressure gauge monitoring bridge pier shaft to pour the process, control bridge pier shaft concreting's speed for the template can not cause the incident.
In the process of implementing the invention, the inventor finds that the accuracy of monitoring the concrete pouring speed of the bridge pier body is not high, a monitoring instrument can cause certain damage to a template, and safety accidents are easy to happen in the construction process.
Disclosure of Invention
The embodiment of the application provides a method for early warning of template side pressure and pouring speed in a bridge pier body pouring process, and can improve the problem that the accuracy of the speed of concrete pouring of the current monitoring bridge pier body is not high, and a monitoring instrument can cause certain damage to a template.
In a first aspect of the present application, a method for early warning of template side pressure and pouring speed in a bridge pier body pouring process is provided, which includes:
acquiring the strain of monitoring points, wherein the monitoring points comprise the middle positions of transverse ribs, panels and pull rods, and the transverse ribs, the panels and the pull rods are all positioned outside a bridge pier body template;
calculating the pressure of a monitoring point according to the strain;
according to the pressure, calculating the pouring speed of the monitoring point;
and pouring early warning is carried out on the bridge pier body according to the pressure and the pouring speed, wherein the pouring early warning comprises the steps of reducing the pouring speed and stopping pouring.
Through the technical scheme above adopting, acquire the meeting an emergency of monitoring point, calculate the pressure of monitoring point according to the meeting an emergency of monitoring point, calculate the pouring speed of monitoring point according to the pressure of monitoring point, according to the pressure of monitoring point and the pouring speed of monitoring point, pour the early warning to the bridge pier shaft, can improve the precision that the speed of current monitoring bridge pier shaft concreting is not high, and monitoring instrument can cause certain damage to the template, the problem of incident easily takes place for the work progress, reach the precision that improves the speed of current monitoring bridge pier shaft concreting, reduce the damage that monitoring instrument caused to the template, the safe effect of construction is maintained simultaneously.
In a possible implementation manner, the calculating the pressure of the monitoring point according to the strain includes:
the pressure at the monitoring point is calculated by:
f1＝kEWδ/s(μl)2
wherein f is1Indicating a pressure at a middle position of the cross rib or a middle position of the panel; k represents a synthesis coefficient; e represents the modulus of elasticity of the cross rib or panel; w represents the section modulus of the cross rib or panel; δ represents the strain at the middle position of the cross rib or the middle position of the panel; s represents the average spacing between cross ribs or between panels; μ represents a span correction factor for the cross rib or panel; l represents the span of the cross-rib or panel;
f2＝EAδ/sR
wherein f is2A pressure indicating a middle position of the tie rod; e represents the modulus of elasticity of the tie rod; a represents the cross-sectional area of the tie rod; delta represents the strain at the middle position of the tie rod; s denotes the average spacing between the tie rods.
In a possible implementation manner, the calculating a pouring speed of a monitoring point according to the pressure includes:
calculating the casting speed of the monitoring point by the following formula:
V＝(F/0.22γt0β1β2)2
wherein V represents the pouring speed of the monitoring point; f represents the pressure of the monitoring point; gamma represents the gravity density of the concrete; t is t0Representing the initial setting time of the newly cast concrete; beta is a1Expressing the influence correction coefficient of the additive; beta is a2And (4) showing the concrete slump influence correction coefficient.
In a possible implementation manner, the early warning of pouring the bridge pier body according to the pressure and the pouring speed includes:
judging whether pouring early warning is carried out or not according to a pressure threshold, the pressure and the pouring speed;
if the pressure of any one of the monitoring points exceeds the pressure threshold, pouring early warning is carried out;
otherwise, no pouring early warning is carried out.
In the second aspect of this application, a early warning device of template side pressure and pouring speed in the process of pouring bridge pier body is provided, include:
the system comprises an acquisition module, a monitoring module and a control module, wherein the acquisition module is used for acquiring the strain of a monitoring point, the monitoring point comprises the middle position of a transverse rib, the middle position of a panel and the middle position of a pull rod, and the transverse rib, the panel and the pull rod are all positioned outside a bridge pier body template;
the first calculation module is used for calculating the pressure of a monitoring point according to the strain;
the second calculation module is used for calculating the pouring speed of the monitoring point according to the pressure;
and the pouring module is used for pouring early warning on the bridge pier body according to the pressure and the pouring speed, wherein the pouring early warning comprises the steps of reducing the pouring speed and stopping pouring.
In a possible implementation manner, the first computing module is specifically configured to:
the pressure at the monitoring point is calculated by:
f1＝kEWδ/s(μl)2
wherein f is1Indicating a pressure at a middle position of the cross rib or a middle position of the panel; k represents a synthesis coefficient; e represents the modulus of elasticity of the cross rib or panel; w represents the section modulus of the cross rib or panel; δ represents the strain at the middle position of the cross rib or the middle position of the panel; s represents the average spacing between cross ribs or between panels; μ represents a span correction factor for the cross rib or panel; l represents the span of the cross-rib or panel;
f2＝EAδ/sR
wherein f is2A pressure indicating a middle position of the tie rod; e represents the modulus of elasticity of the tie rod; a represents the cross-sectional area of the tie rod; delta represents the strain at the middle position of the tie rod; s denotes the average spacing between the tie rods.
In a possible implementation manner, the second calculation module is specifically configured to:
calculating the casting speed of the monitoring point by the following formula:
V＝(F/0.22γt0β1β2)2
wherein V represents the pouring speed of the monitoring point; f represents the pressure of the monitoring point; gamma represents the gravity density of the concrete; t is t0Representing the initial setting time of the newly cast concrete; beta is a1Expressing the influence correction coefficient of the additive; beta is a2And (4) showing the concrete slump influence correction coefficient.
In one possible implementation, the pouring module is specifically configured to:
judging whether pouring early warning is carried out or not according to a pressure threshold, the pressure and the pouring speed;
if the pressure of any one of the monitoring points exceeds the pressure threshold, pouring early warning is carried out;
otherwise, no pouring early warning is carried out.
In a third aspect of the present application, an electronic device is provided. The electronic device includes: a memory having a computer program stored thereon and a processor implementing the method as described above when executing the computer program.
In a fourth aspect of the application, a computer-readable storage medium is provided, on which a computer program is stored, which computer program, when being executed by a processor, carries out the steps of the method.
It should be understood that what is described in this summary section is not intended to limit key or critical features of the embodiments of the application, nor is it intended to limit the scope of the application. Other features of the present application will become apparent from the following description.
Drawings
The above and other features, advantages and aspects of various embodiments of the present application will become more apparent by referring to the following detailed description when taken in conjunction with the accompanying drawings. In the drawings, like or similar reference characters designate like or similar elements, and wherein:
fig. 1 shows a flowchart of an early warning method for template side pressure and pouring speed in a pouring process of a bridge pier body in the embodiment of the present application.
Fig. 2 shows a structural diagram of an early warning device for template side pressure and pouring speed in the pouring process of a bridge pier body in the embodiment of the application.
Fig. 3 shows a schematic structural diagram of an electronic device suitable for implementing embodiments of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.
The early warning method for the template side pressure and the pouring speed in the pouring process of the bridge pier body can be applied to the technical field of bridge construction, for example, scenes such as pouring of the bridge pier body and the like.
In bridge and overhead construction, pier body pouring is an important process. In the concrete pouring process of the pier body, if the horizontal deviation and the vertical deviation exist in the template for pouring the pier body concrete, the construction quality and the safety of the pier body are influenced, and accidents such as expansion, mold explosion and the like can be caused in serious conditions.
Among the reasons for the occurrence of the burst of the concrete form, the common reason is that field workers do not strictly perform working procedures according to a construction scheme. For example, the concrete pouring speed is too fast, so that the concrete poured into the concrete formwork extrudes the whole body of the concrete formwork, the stress deformation of the side body panel of the concrete formwork is too large, and the accidents of formwork expansion and formwork explosion occur.
Further, the reasons for the occurrence of the mold expansion and mold explosion accidents are analyzed. Firstly, the pouring speed is a factor directly influencing the internal pressure of the concrete formwork around the concrete pouring process, and is also the most concerned factor of the construction unit. Secondly, the internal pressure of the whole concrete formwork body can influence the stress state of the concrete formwork, but the monitoring of the internal pressure of the whole concrete formwork body is also complicated and easily causes the formwork to be damaged, influences the pouring quality of the pier body and the like.
To explain further, the main factors that usually cause the accidents of mold expansion and mold burst can be summarized as including the casting speed of concrete and the internal pressure of the concrete form around the body. In other words, in the pouring process, the pouring of the concrete is not flat pouring, which may cause excessive partial pouring, and thus, the pressure of the corresponding formwork at the excessive partial pouring position in the internal pressure of the concrete formwork around the concrete formwork is too high, and the accidents of formwork expansion and formwork explosion occur.
Therefore, the two factors (i.e. the monitoring items in the pouring process) are the more key contents in monitoring the pouring process, and whether safety accidents exist can be judged directly through the design pressure and the design pouring speed. However, it is troublesome and laborious to monitor these two factors intuitively during the construction process.
In terms of casting speed, a laser range finder is generally used to monitor the casting speed of the concrete by irradiating vertically downward from the top of the concrete form. However, in the pouring process, because the binding of the reinforcing steel bars of the pier body in the concrete template is very dense, the laser range finder is possibly shielded, and the pouring speed cannot be accurately measured finally.
As for the internal pressure of the concrete form, a pressure gauge is generally used, which is welded to the inside of the concrete form to monitor the internal pressure of the concrete form. However, in the pouring process, the pressure gauge is welded on the inner side of the concrete formwork, so that the formwork is possibly damaged to a certain extent, and finally, after the concrete pouring is finished, the pressure gauge is buried in the concrete and cannot be detached, so that the pressure gauge cannot be recycled.
In summary, according to the current method for monitoring the speed of pouring concrete into the bridge pier body, the accuracy of monitoring the speed of pouring concrete into the bridge pier body is not high due to the fact that the limit value accuracy of construction site conditions and equipment instruments is not high, and the pressure gauge is welded inside the template and cannot be repeatedly taken out for use, so that the template can be damaged to a certain extent.
In order to solve the technical problem, the embodiment of the application provides an early warning method for template side pressure and pouring speed in the pouring process of a bridge pier body. In some embodiments, the method for early warning of template-side pressure and casting speed during casting of the pier body of the bridge may be performed by an electronic device.
Fig. 1 shows a flow chart of an early warning method for template side pressure and pouring speed in a pouring process of a bridge pier body in the embodiment of the application. Referring to fig. 1, the method for early warning of template side pressure and pouring speed in the pouring process of the pier body of the bridge in the embodiment includes:
step 101: the strain of the monitoring points is obtained, the monitoring points comprise the middle positions of the cross ribs, the middle positions of the panels and the middle positions of the pull rods, and the cross ribs, the panels and the pull rods are all located outside the bridge pier body formwork.
Step 102: and calculating the pressure of the monitoring point according to the strain.
Step 103: and calculating the pouring speed of the monitoring point according to the pressure.
Step 104: and pouring early warning is carried out on the bridge pier body according to the pressure and the pouring speed, wherein the pouring early warning comprises the steps of reducing the pouring speed and stopping pouring.
Through adopting above technical scheme, acquire the meeting an emergency of monitoring point, calculate the pressure of monitoring point according to the meeting an emergency of monitoring point, calculate the speed of pouring of monitoring point according to the pressure of monitoring point, pour the early warning according to the pressure of monitoring point and the speed of pouring of monitoring point to the bridge pier shaft. The method for calculating the pouring speed and the pouring pressure by monitoring the strain of the template outside the bridge pier body template can improve the problem that the accuracy of the speed of pouring concrete of the current monitoring bridge pier body is not high, a monitoring instrument can cause certain damage to the template, safety accidents easily occur in the construction process, the accuracy of the speed of pouring concrete of the current monitoring bridge pier body is improved, the damage of the monitoring instrument to the template is reduced, and the effect of safe construction is maintained.
In the embodiment of the application, the positions of the transverse ribs, the panels, the pull rods and the like outside the concrete formwork (bridge pier body formwork) which are better equipped with the sensors are respectively selected as monitoring points. And a sensor is arranged at each monitoring point to monitor the strain of dangerous sections such as the midspan of the transverse rib, the midspan of the panel, the middle of the pull rod and the like.
In the embodiment of the application, more than two sensors can be arranged at each monitoring point, and the strain of a certain monitoring point is determined by calculating the average value of the strains monitored by a plurality of strain gauges at the point, so that the measurement error is reduced.
Optionally, the sensor is a vibrating wire type surface strain gauge which can be arranged on the surface of a concrete structure or other material structures for a long time.
In the embodiment of the application, the relation between strain and pressure and the pouring speed is deduced by using a theoretical formula, so that the aim of indirectly monitoring the pressure and the pouring speed is fulfilled.
In the embodiment of the application, a theoretical formula is mainly used for establishing a relational expression of pouring speed → internal pressure of the whole body of the concrete template → stress (strain) of a monitoring point according to 4.1.1.4 contents (the relation between the internal pressure of the whole body of the concrete template and the pouring speed) in building construction template safety technical specification (JGJ162-2017) and the mechanical relation between the stress of the monitoring point on each member (transverse rib, panel and pull rod) and the internal pressure of the whole body of the concrete template.
In some embodiments, step 102 comprises step a.
Step A: the pressure at the monitoring point is calculated by:
f1＝kEWδ/s(μl)2
wherein f is1Indicating a pressure at a middle position of the cross rib or a middle position of the panel; k represents a synthesis coefficient; e represents the modulus of elasticity of the cross rib or panel; w represents the section modulus of the cross rib or panel; δ represents the strain at the middle position of the cross rib or the middle position of the panel; s represents the average spacing between cross ribs or between panels; μ represents a span correction factor for the cross rib or panel; l represents the span of the cross-rib or panel.
f2＝EAδ/sR
Wherein f is2A pressure indicating a middle position of the tie rod; e represents the modulus of elasticity of the tie rod; a represents the cross-sectional area of the tie rod; delta represents the strain at the middle position of the tie rod; s denotes the average spacing between the tie rods.
In the present embodiment, for the cross rib, the overall coefficient k is 48, and the span correction coefficient μ is 1.24; for the panel, the overall coefficient k is 24 and the span correction coefficient μ is 1.00. And respectively substituting the data of monitoring points at the transverse ribs, the panel and the pull rods into the established relation between the strain and the pressure, and reversely calculating the pressure of the monitoring points at the transverse ribs, the panel and the pull rods. For example, by calculation, it is found that the pressure at the monitoring points at the cross rib, face plate and tie rod, respectively, is f'1、f″1And f2。
In some embodiments, step 102 may also include step B1 through step B2.
Step B1: the monitor point pressure is calculated forward by:
F2＝γH
wherein, F2Representing the pressure of a forward calculation monitoring point; gamma represents the gravity density of the concrete; h represents the absolute value of the height difference between the monitoring point and the concrete top surface of the pier body of the bridge.
Step B2: and judging the pressure value of the monitoring point calculated in the reverse direction through the strain and the pressure value of the monitoring point calculated in the forward direction through the height.
And if the pressure value of the monitoring point calculated in the forward direction is less than or equal to the pressure value of the monitoring point calculated in the reverse direction, taking the pressure value of the monitoring point calculated in the forward direction as the pressure of the monitoring point.
And conversely, taking the pressure value of the monitoring point reversely calculated as the pressure of the monitoring point.
In the embodiment of the application, in order to reduce calculation errors, the monitoring point pressure is further determined through pouring height. And calculating the pressure of the monitoring point in the forward direction according to the calculation result of the pouring height on the pressure in the monitoring point. And comparing the pressure value of the monitoring point calculated in the reverse direction through the strain with the pressure value of the monitoring point calculated in the forward direction through the height, and selecting a small value to be positioned as the pressure of the monitoring point.
In some embodiments, step 103 comprises: and C, performing step C.
And C: calculating the casting speed of the monitoring point by the following formula:
V＝(F/0.22γt0β1β2)2
wherein V represents the pouring speed of the monitoring point; f represents the pressure of the monitoring point; gamma represents the gravity density of the concrete; t is t0Representing the initial setting time of the newly cast concrete; beta is a1Expressing the influence correction coefficient of the additive; beta is a2And (4) showing the concrete slump influence correction coefficient.
In the embodiment of the application, the initial setting time t of the newly cast concrete0Can be determined experimentally, and in the absence of experimental data, t can be used0200/(T +15) (T is the temperature of the concrete). Additive influence correction coefficient beta1Can be determined according to the slump, when the slump is less than 30mm, 0.85 is taken; taking 1.0 when the slump is 50-90 mm; when the slump is 110-150mm, 1.15 is taken (the slump exceeds 150 and a limit value is taken as 1.15).
In the embodiment of the application, the pressure of the monitoring point is substituted into the above formula, and the casting speed under the pressure of the monitoring point can be obtained through calculation. For example, the pressure f 'of the monitoring points at the cross-ribs, face plates and tie rods'1、f″1And f2(namely the pressure F of the monitoring point) is substituted into the formula, and the building speed V 'of the monitoring points at the transverse ribs, the panel and the pull rods can be calculated'1、V″1And V2。
In some embodiments, step 106 comprises: and D, step D.
Step D: and judging whether pouring early warning is carried out or not according to the pressure threshold, the pressure and the pouring speed.
And if the pressure of any one of the monitoring points exceeds the pressure threshold value, pouring early warning is carried out.
Otherwise, no pouring early warning is carried out.
In the embodiment of the present application, in general, when a bridge or an overhead structure is designed, there is a design value of a casting speed, and the design value of the casting speed can be generally defined as a casting speed threshold. According to the conversion relation between the pressure and the speed, the pressure threshold value can be obtained by calculation according to the pouring speed threshold value.
In the embodiment of the application, whether pouring early warning is performed or not is judged. Specifically, the pouring process can be carried out all the time, the pressure of any one of the monitoring points which are inversely calculated is compared with the design pressure required by the specification, meanwhile, the pouring speed is compared with the design pouring speed required by the specification, if any one of the monitoring points exceeds the threshold value, early warning is carried out, and a constructor is prompted to take a corresponding measure. For example, the constructor is prompted to reduce the casting speed or stop casting.
For example, the casting speed threshold is set to 2m/h, and the obtainable pressure threshold is 80kPa, calculated from the casting speed threshold. If the pressure of any one monitoring point in the monitoring points calculated by monitoring the acquired data in real time through the strain gauge is higher than 80kPa, the pouring speed of the bridge pier body concrete exceeds the pouring speed threshold value at the moment, namely the pouring speed exceeds 2 m/h. At this time, the construction side is prompted to reduce the casting speed or stop casting.
In the embodiment of the application, whether pouring is performed or not can be judged. Specifically, the pressure of any one monitoring point in the reversely calculated monitoring points is compared with the design pressure required by the specification, meanwhile, the pouring speed is compared with the design pouring speed required by the specification, if any one monitoring point exceeds the threshold value, the possibility of safety accidents in the construction process is rapidly increased, pouring early warning is given, a constructor is prompted to take corresponding measures, the pouring speed is immediately reduced, or pouring is immediately stopped, so that the construction safety is ensured. It should be noted that, for simplicity of description, the above-mentioned method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present application is not limited by the order of acts described, as some steps may occur in other orders or concurrently depending on the application. Further, those skilled in the art should also appreciate that the embodiments described in the specification are exemplary embodiments and that the acts and modules referred to are not necessarily required in this application.
The above is a description of method embodiments, and the embodiments of the present application are further described below by way of apparatus embodiments.
Fig. 2 shows a structural diagram of an early warning device for template side pressure and pouring speed in a bridge pier body pouring process according to an embodiment of the application. Referring to fig. 2, the early warning device for template side pressure and casting speed in the process of casting a bridge pier body comprises an acquisition module 201, a first calculation module 202, a second calculation module 203 and a casting module 204.
The acquisition module 201 is used for acquiring the strain of monitoring points, the monitoring points comprise the middle positions of transverse ribs, panels and pull rods, and the transverse ribs, the panels and the pull rods are all located outside the bridge pier body formwork.
And a first calculating module 202, configured to calculate a pressure of the monitoring point according to the strain.
And the second calculating module 203 is used for calculating the pouring speed of the monitoring point according to the pressure.
And the pouring module 204 is used for pouring early warning on the bridge pier body according to the pressure and the pouring speed, wherein the pouring early warning comprises the steps of reducing the pouring speed and stopping pouring.
In some embodiments, the first calculation module 202 is specifically configured to:
the pressure at the monitoring point is calculated by:
f1＝kEWδ/s(μl)2
wherein f is1Indicating a pressure at a middle position of the cross rib or a middle position of the panel; k represents a synthesis coefficient; e represents the modulus of elasticity of the cross rib or panel; w represents a cross ribOr the section modulus of the panel; δ represents the strain at the middle position of the cross rib or the middle position of the panel; s represents the average spacing between cross ribs or between panels; μ represents a span correction factor for the cross rib or panel; l represents the span of the cross-rib or panel.
f2＝EAδ/sR
Wherein f is2A pressure indicating a middle position of the tie rod; e represents the modulus of elasticity of the tie rod; a represents the cross-sectional area of the tie rod; delta represents the strain at the middle position of the tie rod; s denotes the average spacing between the tie rods.
In some embodiments, the second calculation module 203 is specifically configured to:
calculating the casting speed of the monitoring point by the following formula:
V＝(F/0.22γt0β1β2)2
wherein V represents the pouring speed of the monitoring point; f represents the pressure of the monitoring point; gamma represents the gravity density of the concrete; t is t0Representing the initial setting time of the newly cast concrete; beta is a1Expressing the influence correction coefficient of the additive; beta is a2And (4) showing the concrete slump influence correction coefficient.
In some embodiments, casting module 204 is specifically configured to:
judging whether pouring early warning is carried out or not according to the pressure threshold, the pressure and the pouring speed;
if the pressure of any one of the monitoring points exceeds a pressure threshold value, pouring early warning is carried out;
otherwise, no pouring early warning is carried out.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working process of the described module may refer to the corresponding process in the foregoing method embodiment, and is not described herein again.
Fig. 3 shows a schematic structural diagram of an electronic device suitable for implementing embodiments of the present application. As shown in fig. 3, the electronic device 300 shown in fig. 3 includes: a processor 301 and a memory 303. Wherein the processor 301 is coupled to the memory 303. Optionally, the electronic device 300 may also include a transceiver 304. It should be noted that the transceiver 304 is not limited to one in practical applications, and the structure of the electronic device 300 is not limited to the embodiment of the present application.
The Processor 301 may be a CPU (Central Processing Unit), a general-purpose Processor, a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array) or other Programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processor 301 may also be a combination of computing functions, e.g., comprising one or more microprocessors, a combination of a DSP and a microprocessor, or the like.
The Memory 303 may be a ROM (Read Only Memory) or other types of static storage devices capable of storing static information and instructions, a RAM (Random Access Memory) or other types of dynamic storage devices capable of storing information and instructions, or an EEPROM (electrically erasable programmable Read-Only Memory)
(Electrically Erasable Programmable Read Only Memory), CD-ROM (Compact disk Read Only Memory) or other optical disk storage, optical disk storage (including Compact disk, laser disk, optical disk, digital versatile disk, Blu-ray disk, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium which can be used to carry or store desired program code in the form of instructions or data structures and which can be accessed by a computer, but is not limited to such.
The memory 303 is used for storing application program codes for executing the scheme of the application, and the processor 301 controls the execution. The processor 301 is configured to execute application program code stored in the memory 303 to implement the aspects illustrated in the foregoing method embodiments.
Among them, electronic devices include but are not limited to: mobile terminals such as mobile phones, notebook computers, digital broadcast receivers, PDAs (personal digital assistants), PADs (tablet computers), PMPs (portable multimedia players), in-vehicle terminals (e.g., in-vehicle navigation terminals), and the like, and fixed terminals such as digital TVs, desktop computers, and the like. The electronic device shown in fig. 3 is only an example, and should not bring any limitation to the functions and the scope of use of the embodiments of the present application.
The present application provides a computer-readable storage medium, on which a computer program is stored, which, when running on a computer, enables the computer to execute the corresponding content in the foregoing method embodiments. Compared with the prior art, in the embodiment of the application, the strain of the monitoring point is obtained, the pressure of the monitoring point is calculated according to the strain of the monitoring point, the pouring speed of the monitoring point is calculated according to the pressure of the monitoring point, and pouring early warning is carried out on the bridge pier body according to the pressure of the monitoring point and the pouring speed of the monitoring point. The method for calculating the pouring speed and the pouring pressure by monitoring the strain of the template outside the bridge pier body template can improve the problem that the accuracy of the speed of pouring concrete of the current monitoring bridge pier body is not high, a monitoring instrument can cause certain damage to the template, safety accidents easily occur in the construction process, the accuracy of the speed of pouring concrete of the current monitoring bridge pier body is improved, the damage of the monitoring instrument to the template is reduced, and the effect of safe construction is maintained.
It should be understood that, although the steps in the flowcharts of the figures are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and may be performed in other orders unless explicitly stated herein. Moreover, at least a portion of the steps in the flow chart of the figure may include multiple sub-steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, which are not necessarily performed in sequence, but may be performed alternately or alternately with other steps or at least a portion of the sub-steps or stages of other steps.
The foregoing is only a partial embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations should also be regarded as the protection scope of the present application.
Claims (10)
1. The early warning method for the lateral pressure and the pouring speed of the template in the pouring process of the bridge pier body is characterized by comprising the following steps of:
acquiring the strain of monitoring points, wherein the monitoring points comprise the middle positions of transverse ribs, panels and pull rods, and the transverse ribs, the panels and the pull rods are all positioned outside a bridge pier body template;
calculating the pressure of a monitoring point according to the strain;
according to the pressure, calculating the pouring speed of the monitoring point;
and pouring early warning is carried out on the bridge pier body according to the pressure and the pouring speed, wherein the pouring early warning comprises the steps of reducing the pouring speed and stopping pouring.
2. The method of claim 1, wherein said calculating a pressure of a monitoring point based on said strain comprises:
the pressure at the monitoring point is calculated by:
f1＝kEWδ/s(μl)2
wherein f is1Indicating a pressure at a middle position of the cross rib or a middle position of the panel; k represents a synthesis coefficient; e represents the modulus of elasticity of the cross rib or panel; w represents the section modulus of the cross rib or panel; delta denotes the middle position of the cross-rib or of the panelStrain; s represents the average spacing between cross ribs or between panels; μ represents a span correction factor for the cross rib or panel; l represents the span of the cross-rib or panel;
f2＝EAδ/sR
wherein f is2A pressure indicating a middle position of the tie rod; e represents the modulus of elasticity of the tie rod; a represents the cross-sectional area of the tie rod; delta represents the strain at the middle position of the tie rod; s denotes the average spacing between the tie rods.
3. The method of claim 2, wherein calculating the casting speed of the monitoring point according to the pressure comprises:
calculating the casting speed of the monitoring point by the following formula:
V＝(F/0.22γt0β1β2)2
wherein V represents the pouring speed of the monitoring point; f represents the pressure of the monitoring point; gamma represents the gravity density of the concrete; t is t0Representing the initial setting time of the newly cast concrete; beta is a1Expressing the influence correction coefficient of the additive; beta is a2And (4) showing the concrete slump influence correction coefficient.
4. The method of claim 3, wherein the early warning of pouring of the bridge pier body according to the pressure and the pouring speed comprises:
judging whether pouring early warning is carried out or not according to a pressure threshold, the pressure and the pouring speed;
if the pressure of any one of the monitoring points exceeds the pressure threshold, pouring early warning is carried out;
otherwise, no pouring early warning is carried out.
5. The utility model provides a bridge pier shaft pours early warning device of die plate side pressure and pouring speed of in-process, its characterized in that includes:
the system comprises an acquisition module, a monitoring module and a control module, wherein the acquisition module is used for acquiring the strain of a monitoring point, the monitoring point comprises the middle position of a transverse rib, the middle position of a panel and the middle position of a pull rod, and the transverse rib, the panel and the pull rod are all positioned outside a bridge pier body template;
the first calculation module is used for calculating the pressure of a monitoring point according to the strain;
the second calculation module is used for calculating the pouring speed of the monitoring point according to the pressure;
and the pouring module is used for pouring early warning on the bridge pier body according to the pressure and the pouring speed, wherein the pouring early warning comprises the steps of reducing the pouring speed and stopping pouring.
6. The apparatus of claim 5, wherein the first computing module is specifically configured to:
the pressure at the monitoring point is calculated by:
f1＝kEWδ/s(μl)2
wherein f is1Indicating a pressure at a middle position of the cross rib or a middle position of the panel; k represents a synthesis coefficient; e represents the modulus of elasticity of the cross rib or panel; w represents the section modulus of the cross rib or panel; δ represents the strain at the middle position of the cross rib or the middle position of the panel; s represents the average spacing between cross ribs or between panels; μ represents a span correction factor for the cross rib or panel; l represents the span of the cross-rib or panel;
f2＝EAδ/sR
wherein f is2A pressure indicating a middle position of the tie rod; e represents the modulus of elasticity of the tie rod; a represents the cross-sectional area of the tie rod; delta represents the strain at the middle position of the tie rod; s denotes the average spacing between the tie rods.
7. The apparatus of claim 6, wherein the second computing module is specifically configured to:
calculating the casting speed of the monitoring point by the following formula:
V＝(F/0.22γt0β1β2)2
wherein V represents the pouring speed of the monitoring point; f represents the pressure of the monitoring point; gamma represents the gravity density of the concrete; t is t0Representing the initial setting time of the newly cast concrete; beta is a1Expressing the influence correction coefficient of the additive; beta is a2And (4) showing the concrete slump influence correction coefficient.
8. The device according to claim 7, wherein the casting module is specifically configured to:
judging whether pouring early warning is carried out or not according to a pressure threshold, the pressure and the pouring speed;
if the pressure of any one of the monitoring points exceeds the pressure threshold, pouring early warning is carried out;
otherwise, no pouring early warning is carried out.
9. An electronic device comprising a memory and a processor, the memory having stored thereon a computer program, wherein the processor, when executing the computer program, implements the method of any of claims 1-4.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 4.
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