CN108951622B - Static pressure pile construction quality control system and method - Google Patents
Static pressure pile construction quality control system and method Download PDFInfo
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- CN108951622B CN108951622B CN201810764386.1A CN201810764386A CN108951622B CN 108951622 B CN108951622 B CN 108951622B CN 201810764386 A CN201810764386 A CN 201810764386A CN 108951622 B CN108951622 B CN 108951622B
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Abstract
The invention relates to a construction quality control system and method for a static pressure pile, wherein the system comprises a controller and a pressure sensor, and the pressure sensor is used for detecting the system pressure of the static pressure pile machine in the working process; the controller comprises a pressure acquisition module, a time recording module, a time-pressure curve drawing module, a characteristic extraction module and a pile length calculation module. The pressure acquisition module is used for acquiring system pressure; the time recording module is used for recording the working time of the static pile press; the time-pressure curve drawing module is used for drawing a time-pressure curve according to the system pressure and the working time; the characteristic extraction module is used for determining a characteristic stage of the working process according to the time-pressure curve and acquiring a characteristic time value of the characteristic stage; and the pile length calculating module is used for calculating the pile length according to the characteristic stage and the characteristic time value by combining a preset algorithm. The invention can carry out high-precision detection on the pile length of the static pressure pile, has reliable detection result and realizes reliable control on the construction quality of the static pressure pile.
Description
Technical Field
The invention relates to the technical field of pile foundation construction quality control, in particular to a static pressure pile construction quality control system and method.
Background
The static pressure pile is one kind of pile foundation, and the static pressure pile construction process is one pile sinking process of pressing prefabricated pile into soil with the pile pressing mechanism of static pile press to provide counter force with the self weight of the pile press and the counter weight on the frame. The static pressure pile can completely avoid vibration, noise and pollution generated by hammering and piling, so that the static pressure pile has the advantages of no damage to the pile, no noise, no vibration, no impact force, no pollution and the like during construction.
Because the pile foundation plays a role in lifting the whole building, the construction quality of the pile foundation pile needs to be controlled so that the construction quality of the pile foundation meets the engineering regulation, and the control on the pile length can prevent the existence of abnormal pile length caused by material reduction due to work stealing in the construction process. In the prior art, the method for detecting the pile length of the static pressure pile is single, and the detection precision is not high, so that the reliability of a detection result is low.
Therefore, it is necessary to provide a more effective or reliable solution to achieve high-precision detection of the pile length of the static pressure pile, improve the reliability of the detection result, and further control the construction quality of the static pressure pile.
Disclosure of Invention
In view of the above problems in the prior art, an object of the present invention is to provide a system and a method for controlling construction quality of a static pressure pile, so as to achieve high-precision detection of pile length of the static pressure pile, improve reliability of a detection result, and further control construction quality of the static pressure pile.
In order to solve the above technical problem, a first aspect of the present invention provides a static pile construction quality control system, including: comprises a controller and a pressure sensor arranged on a static pile press,
the pressure sensor is used for detecting the system pressure of the static pile machine in the working process;
the controller comprises a pressure acquisition module, a time recording module, a time-pressure curve drawing module, a characteristic extraction module and a pile length calculation module,
the pressure acquisition module is used for acquiring the system pressure;
the time recording module is used for recording the working time of the static pile press;
the time-pressure curve drawing module is used for drawing a time-pressure curve according to the system pressure and the working time;
the characteristic extraction module is used for determining a characteristic stage of the working process according to the time-pressure curve and acquiring a characteristic time value of the characteristic stage;
and the pile length calculating module is used for calculating the pile length by combining a preset algorithm according to the characteristic stage and the characteristic time value.
Further, the controller further comprises a speed acquisition module, wherein the speed acquisition module is used for acquiring the characteristic speed corresponding to the characteristic stage;
and the pile length calculating module is used for calculating the pile length by combining a preset algorithm according to the characteristic stage, the characteristic time value and the characteristic speed.
Further, the characteristic phase comprises a cylinder retracting characteristic phase and a cylinder lifting characteristic phase, and the preset algorithm is represented as:
wherein v isiThe characteristic speed is corresponding to the cylinder retracting characteristic stage i;
∑tithe characteristic time value of the cylinder receiving characteristic stage i is obtained;
vlthe characteristic speed corresponding to the characteristic stage l of the cylinder is obtained;
∑tlthe characteristic time value of the cylinder lifting characteristic stage l is obtained;
a is the known design penetration depth;
y is the pile length.
Further, the cylinder characteristic collecting stage includes a general cylinder characteristic collecting stage and a cylinder characteristic collecting stage with a pile, the cylinder characteristic raising stage includes a general cylinder characteristic raising stage and a cylinder characteristic raising stage with a pile, and the preset algorithm is as follows:
v1∑t1+v2∑t2＝v3∑t3+v4∑t4+(Y+a)
wherein v is1The characteristic speed corresponding to the characteristic stage of the common cylinder is obtained;
∑t1the characteristic time value of a general cylinder receiving characteristic stage is obtained;
v2the characteristic speed corresponding to the characteristic stage of the cylinder is collected with the pile;
∑t2the characteristic time value of a general pile-bearing cylinder-retracting characteristic stage is obtained;
v3the characteristic speed corresponding to the characteristic stage of the common lifting cylinder;
∑t3the characteristic time value of the characteristic stage of the common cylinder is obtained;
v4the characteristic speed corresponding to the characteristic stage of the cylinder lifting with the pile is obtained;
∑t4the characteristic time value of the characteristic stage of the lifting cylinder with the pile is obtained;
a is the known design penetration depth;
y is the pile length.
Further, the determining the characteristic stage of the working process according to the characteristic curve comprises:
determining a characteristic phase of the working process according to the characteristic of the system pressure; typical characteristics of the system pressure include at least: instantaneous increase in pressure and constant pressure.
Further, the controller also comprises a standard pile length calculating module, a comparing module and a determining module,
the standard pile length calculating module is used for calculating the standard pile length according to the standard characteristic time value of the characteristic stage;
the comparison module is used for comparing the pile length with the standard pile length to obtain a deviation value of the pile length from the standard pile length;
the determining module is used for determining the pile length as an abnormal pile length when the deviation value meets a preset threshold value.
A second aspect of the present invention provides a static pile construction quality control method, including:
the method comprises the steps of obtaining system pressure of a static pile press in the working process, and recording working time of the static pile press;
drawing a time-pressure curve according to the system pressure and the working time;
determining a characteristic stage of the working process based on the time-pressure curve, and acquiring a characteristic time value of the characteristic stage;
and calculating the pile length by combining a preset algorithm according to the characteristic stage and the characteristic time value.
Further, the step of calculating the pile length by combining a preset algorithm according to the characteristic stage and the characteristic time value comprises:
acquiring a characteristic speed corresponding to the characteristic stage;
calculating the pile length by combining a preset algorithm according to the characteristic stage, the characteristic time value and the characteristic speed;
the characteristic stages comprise a cylinder retracting characteristic stage and a cylinder lifting characteristic stage, and the preset algorithm is represented as:
wherein v isiThe characteristic speed is corresponding to the cylinder retracting characteristic stage i;
∑tithe characteristic time value of the cylinder receiving characteristic stage i is obtained;
vlthe characteristic speed corresponding to the characteristic stage l of the cylinder is obtained;
∑tlthe characteristic time value of the cylinder lifting characteristic stage l is obtained;
a is the known design penetration depth;
y is the pile length.
Further, before calculating the pile length by combining a preset algorithm according to the characteristic phase and the characteristic time value, the method further comprises:
acquiring a standard characteristic time value of the characteristic stage;
and calculating the standard pile length by combining a preset algorithm according to the characteristic stage and the standard characteristic time value.
Further, after the pile length is calculated by combining a preset algorithm according to the characteristic phase and the characteristic time value, the method further comprises the following steps:
comparing the pile length with the standard pile length to obtain a deviation value of the pile length from the standard pile length;
and when the deviation value meets a preset threshold value, determining the pile length as an abnormal pile length.
The construction quality control system and method for the static pressure pile have the following beneficial effects:
according to the method, a time-pressure curve is drawn according to the system pressure and the time in the working process of the static pressure pile machine, the characteristic time values corresponding to each characteristic stage and the characteristic stages in the working process are obtained according to the time-pressure curve, the pile length is calculated according to the characteristic stages, the characteristic time values and a preset algorithm, the high-precision detection of the pile length of the static pressure pile is realized, the reliability of a detection result is improved, the abnormal pile length can be determined according to the pile length subsequently, and the reliable control of the construction quality of the static pressure pile is realized.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description of the embodiment or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a schematic structural diagram of a construction quality control system for a static pressure pile according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a time-pressure curve provided by an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a controller according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a provisioning algorithm provided by an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of another controller provided in an embodiment of the present invention;
fig. 6 is a flow chart of a static pressure pile construction quality control method according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The oil pressure system of the static pile press is a closed pressure system, the pressure change of the oil pressure system (hereinafter referred to as the system pressure) is caused by the movement of the static pile press, each independent action of the static pile press causes the change of the system pressure, and the static pile press has the characteristic of a curve of the static pile press. All typical construction actions of the static pressure pile machine can generate a unique and discriminable system pressure curve section with typical characteristics, the system pressure curve section is reflected on a time-system pressure curve, all working conditions of the static pressure pile machine can be traced through comprehensive analysis of time-system pressure curve data, the construction pile length can be accurately determined according to the system pressure curve data, and then whether the pile length meets design requirements or not is judged, and the abnormal pile length caused by material stealing and material reduction in the construction process is prevented.
In the embodiment of the present specification, the pile length refers to the length of a pile identified on a construction drawing provided by a design unit.
Based on the analysis, the invention provides a static pressure pile construction quality control system, which can accurately detect the pile length, thereby realizing high-precision detection of the pile length of the static pressure pile, improving the reliability of a detection result and further controlling the construction quality of the static pressure pile.
Referring to fig. 1, a schematic structural diagram of a static pile construction quality control system according to an embodiment of the present invention is shown, and as shown in fig. 1, the system may include: the system comprises a controller 10 and a pressure sensor 20, wherein the pressure sensor 20 is arranged on the static pile machine and used for detecting the system pressure of the static pile machine during operation. The pressure sensor 20 is connected to the controller 10, and may transmit the detected system pressure to the controller 10, for example, a GPRS module may be configured on the pressure sensor 20, and the detected system pressure may be wirelessly transmitted to the controller 10 through the GPRS module.
In the embodiment of the specification, the working process of the static pile machine can be embodied in the process of continuously retracting the cylinder, lifting the cylinder and the like of the hydraulic device of the static pile machine.
With continued reference to fig. 1, the controller 10 may include a pressure acquisition module 110, a time recording module 120, a time-pressure curve plotting module 130, a feature extraction module 140, and a pile length calculation module 150.
The pressure acquisition module 110 may be communicatively coupled to the pressure sensor 20 to acquire the system pressure detected by the pressure sensor 20.
The time recording module 120 may be configured to record the working time of the static pile press, and the time recording module 120 may continuously record each time point in the working process of the static pile press, specifically, the time recording module 120 may be connected to the pressure obtaining module 110, and cooperate with the pressure obtaining module 110 to record the working time of the static pile press. For example, the time recording module 120 may record a corresponding time point when the pressure obtaining module 110 obtains a system pressure value.
The time-pressure curve drawing module 130 may be used to draw a time-pressure curve according to the system pressure obtained by the pressure obtaining module 110 and the operating time recorded by the time recording module 120. Fig. 2 is a schematic diagram of a time-pressure curve plotted with the system pressure on the abscissa and the working time on the ordinate.
It should be noted that fig. 2 is only an example of a time-pressure curve, and other types of time-pressure curves can be drawn according to the system pressure and the working time in practical applications. For example, the system pressure and the working time may be previously processed, respectively, and then a time-pressure curve may be plotted according to the processed data, which is not particularly limited by the present invention.
The feature extraction module 140 may be configured to determine a feature stage of the working process of the static pile driver according to the time-pressure curve drawn by the time-pressure curve drawing module 130, and obtain a feature time value of each feature stage.
In the embodiment of the present specification, the characteristic time value of a characteristic phase is the duration of the corresponding characteristic phase, that is, the characteristic time value is the time interval between the on-time of entering a certain characteristic phase and the off-time of leaving the characteristic phase.
In the embodiment of the description, the characteristic stage of the working process of the static pile machine can be determined according to the characteristic of the system pressure. In general, typical characteristics of the system pressure of a static pile press include at least an instantaneous rise in pressure and a constant pressure. For example, a typical feature a including the following features is also possible: (1) the pressure changes slowly or has a sudden change; (2) transversely comparing the characteristic time value (such as cylinder receiving time) of a certain characteristic stage for a longer time; (3) in longitudinal comparison, the pile pressing time in one stroke is longer and longer; (4) the theoretical maximum pile driving speed is not reached, especially at the end of the pressing process.
With reference to fig. 2, the characteristic stages of the working process of the static pile machine can be determined according to the typical characteristics of the system pressure, including a pile embracing (typically characterized by instantaneous rise of pressure), a cylinder raising characteristic stage (typically characterized by the content of the above-mentioned typical characteristic a), a pressure relief characteristic stage (typically characterized by instantaneous rise of pressure) and a cylinder retracting characteristic stage (typically characterized by constant pressure).
The pile length calculating module 150 may be configured to calculate the pile length according to the characteristic phase and the characteristic time value corresponding to the characteristic phase, in combination with a preset algorithm.
In this embodiment, as shown in the structural schematic diagram of the controller shown in fig. 3, the controller 10 may further include a speed obtaining module 160, where the speed obtaining module 160 may be configured to obtain the characteristic speed of the static pile machine at each characteristic stage. The characteristic speed corresponds to an object representing the working process of the static pile press, and when the working process of the static pile press is realized through the matched processes of cylinder retracting, cylinder lifting and the like of the hydraulic device, the characteristic speed can be the movement speed of the hydraulic device in the processes of cylinder retracting, cylinder lifting and the like.
The characteristic speed can be artificially input according to the actual working condition; a speed detection device may also be provided on the static pile machine, by means of which the corresponding movement speed is detected and transmitted to the speed acquisition module 160 of the controller 10.
Then, the pile length calculating module 150 may be configured to calculate the pile length according to the characteristic phase, the characteristic time value, and the characteristic speed, in combination with a preset algorithm.
Specifically, as shown in fig. 4, in consideration of the whole working process of the static pile driver, the hydraulic device moves linearly from the reference shaft and finally returns to the reference shaft, and in the continuous back-and-forth process of retracting the cylinder and raising the cylinder, the displacement sum Σ S of the two opposite-direction movements is finally equal to each other, regardless of the elapsed time, that is:
∑cylinder retracting deviceS＝∑Lifting cylinderS
Referring to fig. 4, that is, 8+6+5+3+3+3 is 28; 5+4+9+2+8 is 28.
As can be seen from the above analysis, the characteristic phase may include a cylinder retracting characteristic phase and a cylinder raising characteristic phase, and the preset algorithm may be represented as:
wherein,
vithe characteristic speed is corresponding to the cylinder retracting characteristic stage i;
∑tithe characteristic time value of the cylinder receiving characteristic stage i is obtained;
vlthe characteristic speed corresponding to the characteristic stage l of the cylinder is obtained;
∑tlthe characteristic time value of the cylinder lifting characteristic stage l is obtained;
a is the known design penetration depth; for example, it may be 2 meters.
Y is the pile length.
In the above formula, v isi，∑ti，vl，∑tlAnd a are known, so the pile length Y of the pile foundation can be accurately calculated through the formula.
In a specific embodiment, the cylinder retracting characteristic stages include a general cylinder retracting characteristic stage and a pile cylinder retracting characteristic stage, the cylinder raising characteristic stages include a general cylinder raising characteristic stage and a pile cylinder raising characteristic stage, and the preset algorithm is as follows:
v1∑t1+v2∑t2＝v3∑t3+v4∑t4+(Y+a)
wherein v is1The characteristic speed corresponding to the characteristic stage of the common cylinder is obtained;
∑t1the characteristic time value of a general cylinder receiving characteristic stage is obtained;
v2the characteristic speed corresponding to the characteristic stage of the cylinder is collected with the pile;
∑t2the characteristic time value of the characteristic stage of the cylinder retraction with the pile is obtained;
v3the characteristic speed corresponding to the characteristic stage of the common lifting cylinder;
∑t3the characteristic time value of the characteristic stage of the common cylinder is obtained;
v4the characteristic speed corresponding to the characteristic stage of the cylinder lifting with the pile is obtained;
∑t4the characteristic time value of the characteristic stage of the lifting cylinder with the pile is obtained;
a is the known design penetration depth; for example, it may be 2 meters.
Y is the pile length.
The pile length Y of the pile foundation can be accurately calculated through the formula.
Referring to fig. 5, which is a schematic structural diagram of another controller according to an embodiment of the present invention, as shown in fig. 5, the controller 10 may further include a standard pile length calculating module 170, a comparing module 180, and a determining module 190.
The standard pile length calculating module 170 may be configured to calculate a standard pile length according to the standard feature time value of the feature stage.
In the embodiment of the present specification, the standard feature time value of the feature phase may be predetermined with reference to the foregoing manner. Specifically, when the first pile is driven in the construction process, the pile length of the first pile can be manually controlled to meet the engineering requirements, then a time-pressure curve is drawn according to the method, the characteristic stage and the characteristic time value of the characteristic stage can be determined according to the time-pressure curve, and the standard pile length can be calculated by combining the preset algorithm.
It should be noted that the length of the pile marked on the construction drawing provided by the design unit may also be directly used as the standard pile length.
The comparison module 180 may be configured to compare the calculated pile length with the standard pile length to obtain a deviation value of the pile length from the standard pile length. In the embodiment of the present specification, the deviation value may be an absolute value of a difference between the pile length and the standard pile length, or may be a ratio of the absolute value of the difference to the standard pile length.
The determining module 190 may be configured to determine the pile length as an abnormal pile length when the deviation value satisfies a preset threshold. In the embodiment of the present specification, the unit of the preset threshold may correspond to the deviation value, for example, when the deviation value is an absolute value of a difference value between the pile length and the standard pile length, the preset threshold may be a value such as 1 meter, 1.5 meters, and the like; when the deviation value is the proportion of the absolute value of the difference value in the standard pile length, the preset threshold value can be 1%, 5% and other numerical values.
In summary, the time-pressure curve is drawn through the system pressure and the system time in the working process of the static pressure pile machine, the characteristic time values corresponding to each characteristic stage and the characteristic stages in the working process are obtained according to the time-pressure curve, the pile length is calculated according to the characteristic stages, the characteristic time values and the preset algorithm, the high-precision detection of the pile length of the static pressure pile is achieved, the reliability of the detection result is improved, the abnormal pile length can be determined according to the pile length subsequently, and the reliable control of the construction quality of the static pressure pile is achieved.
Corresponding to the static pressure pile construction quality control systems provided in the above embodiments, embodiments of the present invention further provide a static pressure pile construction quality control method, and since the static pressure pile construction quality control method provided in the embodiments of the present invention corresponds to the static pressure pile construction quality control systems provided in the above embodiments, the implementation of the static pressure pile construction quality control system is also applicable to the static pressure pile construction quality control method provided in this embodiment, and will not be described in detail in this embodiment.
Referring to fig. 6, which is a flowchart illustrating a method for controlling construction quality of a static pressure pile according to an embodiment of the present invention, as shown in fig. 6, the method may include:
s602, obtaining the system pressure of the static pile press in the working process, and recording the working time of the static pile press.
In the embodiment of the specification, the system pressure is the pressure of an oil pressure system in the working process of the static pressure pile machine. The working time of the static pile press can be continuously recorded at each time point in the working process of the static pile press, the recorded time points can be corresponding to the acquired system pressure, and for example, when one system pressure value is acquired, one time point can be correspondingly recorded.
And S604, drawing a time-pressure curve according to the system pressure and the working time.
S606, determining a characteristic stage of the working process based on the time-pressure curve, and acquiring a characteristic time value of the characteristic stage.
In the embodiment of the present specification, the characteristic time value of a characteristic phase is the duration of the corresponding characteristic phase, that is, the characteristic time value is the time interval between the on-time of entering a certain characteristic phase and the off-time of leaving the characteristic phase.
In the embodiment of the description, the characteristic stage of the working process of the static pile machine can be determined according to the characteristic of the system pressure. In general, typical characteristics of the system pressure of a static pile press include at least an instantaneous rise in pressure and a constant pressure. For example, a typical feature a including the following features is also possible: (1) the pressure changes slowly or has a sudden change; (2) transversely comparing the characteristic time value (such as cylinder receiving time) of a certain characteristic stage for a longer time; (3) in longitudinal comparison, the pile pressing time in one stroke is longer and longer; (4) the theoretical maximum pile driving speed is not reached, especially at the end of the pressing process.
And S608, calculating the pile length by combining a preset algorithm according to the characteristic stage and the characteristic time value.
In the embodiment of the present specification, a feature speed corresponding to the feature stage may be obtained, and the pile length may be calculated by combining a preset algorithm according to the feature stage, the feature time value, and the feature speed. The characteristic speed corresponds to an object representing the working process of the static pile press, and when the working process of the static pile press is realized through the matched processes of cylinder retracting, cylinder lifting and the like of the hydraulic device, the characteristic speed can be the movement speed of the hydraulic device in the processes of cylinder retracting, cylinder lifting and the like.
The characteristic speed can be artificially input according to the actual working condition; the static pile press can also be provided with a speed detection device, and the corresponding movement speed can be obtained through the speed detection device.
In the embodiment of the description, it can be known in consideration of the whole process of the operation of the static pressure pile machine that the hydraulic device makes a linear motion starting from the reference shaft and finally returns to the reference shaft, and in the continuous back and forth process of cylinder withdrawing and cylinder raising, the displacement sum Σ S of two opposite direction motions is finally equal, and is irrelevant to the elapsed time, that is:
∑cylinder retracting deviceS＝∑Lifting cylinderS
Referring to fig. 4, that is, 8+6+5+3+3+3 is 28; 5+4+9+2+8 is 28.
As can be seen from the above analysis, the characteristic phase may include a cylinder retracting characteristic phase and a cylinder raising characteristic phase, and the preset algorithm may be represented as:
wherein,
vithe characteristic speed is corresponding to the cylinder retracting characteristic stage i;
∑tithe characteristic time value of the cylinder receiving characteristic stage i is obtained;
vlthe characteristic speed corresponding to the characteristic stage l of the cylinder is obtained;
∑tlthe characteristic time value of the cylinder lifting characteristic stage l is obtained;
a is the known design penetration depth; for example, it may be 2 meters.
Y is the pile length.
In the above formula, v isi，∑ti，vl，∑tlAnd a are known, so the pile length Y of the pile foundation can be accurately calculated through the formula.
In a specific embodiment, the cylinder retracting characteristic stages include a general cylinder retracting characteristic stage and a pile cylinder retracting characteristic stage, the cylinder raising characteristic stages include a general cylinder raising characteristic stage and a pile cylinder raising characteristic stage, and the preset algorithm is as follows:
v1∑t1+v2∑t2＝v3∑t3+v4∑t4+(Y+a)
wherein v is1The characteristic speed corresponding to the characteristic stage of the common cylinder is obtained;
∑t1the characteristic time value of a general cylinder receiving characteristic stage is obtained;
v2the characteristic speed corresponding to the characteristic stage of the cylinder is collected with the pile;
∑t2the characteristic time value of the characteristic stage of the cylinder retraction with the pile is obtained;
v3the characteristic speed corresponding to the characteristic stage of the common lifting cylinder;
∑t3the characteristic time value of the characteristic stage of the common cylinder is obtained;
v4the characteristic speed corresponding to the characteristic stage of the cylinder lifting with the pile is obtained;
∑t4the characteristic time value of the characteristic stage of the lifting cylinder with the pile is obtained;
a is the known design penetration depth; for example, it may be 2 meters.
Y is the pile length.
The pile length Y of the pile foundation can be accurately calculated through the formula.
In another specific embodiment, before the stake length is calculated according to the characteristic phase and the characteristic time value by combining a preset algorithm, a standard characteristic time value of the characteristic phase can be obtained, and the standard stake length is calculated according to the characteristic phase and the standard characteristic time value by combining the preset algorithm.
The standard feature time value of the feature phase may be predetermined in the manner described above. Specifically, when the first pile is driven in the construction process, the pile length of the first pile can be manually controlled to meet the engineering requirements, then a time-pressure curve is drawn according to the method, the characteristic stage and the characteristic time value of the characteristic stage can be determined according to the time-pressure curve, and the standard pile length can be calculated by combining the preset algorithm.
It should be noted that the length of the pile marked on the construction drawing provided by the design unit may also be directly used as the standard pile length.
After the standard pile length and the pile length are calculated, the pile length can be compared with the standard pile length to obtain a deviation value of the pile length deviating from the standard pile length, and the pile length is determined as the abnormal pile length when the deviation value meets a preset threshold value, so that the abnormal pile length caused by material stealing and material reduction in the construction process can be prevented, and the construction quality of the static pressure pile can be effectively controlled.
In the embodiment of the present specification, the deviation value may be an absolute value of a difference between the pile length and the standard pile length, or may be a ratio of the absolute value of the difference to the standard pile length. The unit of the preset threshold may correspond to the deviation value, for example, when the deviation value is an absolute value of a difference value between the pile length and the standard pile length, the preset threshold may be a number such as 1 meter, 1.5 meters, and the like; when the deviation value is the proportion of the absolute value of the difference value in the standard pile length, the preset threshold value can be 1%, 5% and other numerical values.
In summary, the static pressure pile construction quality control method provided by the embodiment of the invention realizes high-precision detection of the pile length of the static pressure pile, and improves the reliability of the detection result, so that the abnormal pile length can be determined according to the pile length subsequently, and the reliable control of the static pressure pile construction quality is realized.
The foregoing description has disclosed fully preferred embodiments of the present invention. It should be noted that those skilled in the art can make modifications to the embodiments of the present invention without departing from the scope of the appended claims. Accordingly, the scope of the appended claims is not to be limited to the specific embodiments described above.
Claims (6)
1. A static pressure pile construction quality control system is characterized by comprising a controller and a pressure sensor arranged on a static pressure pile machine,
the pressure sensor is used for detecting the system pressure of the static pile machine in the working process;
the controller comprises a pressure acquisition module, a time recording module, a time-pressure curve drawing module, a characteristic extraction module, a speed acquisition module and a pile length calculation module,
the pressure acquisition module is used for acquiring the system pressure;
the time recording module is used for recording the working time of the static pile press;
the time-pressure curve drawing module is used for drawing a time-pressure curve according to the system pressure and the working time;
the characteristic extraction module is used for determining a characteristic stage of the working process according to the time-pressure curve and acquiring a characteristic time value of the characteristic stage;
the speed acquisition module is used for acquiring the characteristic speed corresponding to the characteristic stage;
the pile length calculating module is used for calculating the pile length by combining a preset algorithm according to the characteristic stage, the characteristic time value and the characteristic speed;
the characteristic stages comprise a cylinder receiving characteristic stage and a cylinder lifting characteristic stage, the cylinder receiving characteristic stage comprises a general cylinder receiving characteristic stage and a cylinder lifting characteristic stage with a pile, the cylinder lifting characteristic stage comprises a general cylinder lifting characteristic stage and a cylinder lifting characteristic stage with a pile, and the preset algorithm is as follows:
v1∑t1+v2∑t2＝v3∑t3+v4∑t4+(Y+a)
wherein v is1The characteristic speed corresponding to the characteristic stage of the common cylinder is obtained;
∑t1the characteristic time value of a general cylinder receiving characteristic stage is obtained;
v2the characteristic speed corresponding to the characteristic stage of the cylinder is collected with the pile;
∑t2the characteristic time value of the characteristic stage of the cylinder retraction with the pile is obtained;
v3the characteristic speed corresponding to the characteristic stage of the common lifting cylinder;
∑t3the characteristic time value of the characteristic stage of the common cylinder is obtained;
v4the characteristic speed corresponding to the characteristic stage of the cylinder lifting with the pile is obtained;
∑t4the characteristic time value of the characteristic stage of the lifting cylinder with the pile is obtained;
a is the known design penetration depth;
y is the pile length.
2. The system of claim 1, wherein the determining the characteristic phase of the work process from the time-pressure curve comprises:
determining a characteristic phase of the working process according to the characteristic of the system pressure; typical characteristics of the system pressure include at least: instantaneous increase in pressure and constant pressure.
3. The static pressure pile construction quality control system according to claim 1, wherein the controller further comprises a standard pile length calculation module, a comparison module and a determination module,
the standard pile length calculating module is used for calculating the standard pile length according to the standard characteristic time value of the characteristic stage;
the comparison module is used for comparing the pile length with the standard pile length to obtain a deviation value of the pile length from the standard pile length;
the determining module is used for determining the pile length as an abnormal pile length when the deviation value meets a preset threshold value.
4. A static pressure pile construction quality control method is characterized by comprising the following steps:
the method comprises the steps of obtaining system pressure of a static pile press in the working process, and recording working time of the static pile press;
drawing a time-pressure curve according to the system pressure and the working time;
determining a characteristic stage of the working process based on the time-pressure curve, and acquiring a characteristic time value of the characteristic stage;
acquiring a characteristic speed corresponding to the characteristic stage;
calculating the pile length by combining a preset algorithm according to the characteristic stage, the characteristic time value and the characteristic speed;
the characteristic stages comprise a cylinder collecting characteristic stage and a cylinder lifting characteristic stage, the cylinder collecting characteristic stage comprises a general cylinder collecting characteristic stage and a cylinder lifting characteristic stage with a pile, the cylinder lifting characteristic stage comprises a general cylinder lifting characteristic stage and a cylinder lifting characteristic stage with a pile, and the preset algorithm is as follows:
v1∑t1+v2∑t2＝v3∑t3+v4∑t4+(Y+a)
wherein v is1The characteristic speed corresponding to the characteristic stage of the common cylinder is obtained;
∑t1the characteristic time value of a general cylinder receiving characteristic stage is obtained;
v2the characteristic speed corresponding to the characteristic stage of the cylinder is collected with the pile;
∑t2the characteristic time value of the characteristic stage of the cylinder retraction with the pile is obtained;
v3the characteristic speed corresponding to the characteristic stage of the common lifting cylinder;
∑t3the characteristic time value of the characteristic stage of the common cylinder is obtained;
v4the characteristic speed corresponding to the characteristic stage of the cylinder lifting with the pile is obtained;
∑t4the characteristic time value of the characteristic stage of the lifting cylinder with the pile is obtained;
a is the known design penetration depth;
y is the pile length.
5. The method of controlling construction quality of a static pressure pile according to claim 4, wherein the method further comprises:
acquiring a standard characteristic time value of the characteristic stage;
and calculating the standard pile length by combining a preset algorithm according to the characteristic stage and the standard characteristic time value.
6. The method of controlling construction quality of a static pressure pile according to claim 5, wherein the method further comprises:
comparing the pile length with the standard pile length to obtain a deviation value of the pile length from the standard pile length;
and when the deviation value meets a preset threshold value, determining the pile length as an abnormal pile length.
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