Vibrating and impacting device for gravel pile packing and packing amount measuring method

Abstract

The invention relates to a vibroflotation device for gravel pile filler and a vibroflotation gravel pile filler quantity measuring method. The vibroflotation device for gravel pile packing belongs to the technical field of pile foundation construction, and comprises a vibroflotation head which is arranged in a packing area and used for conducting gravel filling on the packing area through vibration in the packing area; the vibroflotation rod is fixedly connected with the vibroflotation head; the vibroflotation rod is used for being arranged in the gravel area and the slurry area. The pressure sensor is used for detecting pressure values generated by the gravel area and the mud area on the vibroflotation rod; the pressure analysis terminal is used for acquiring pressure values generated by the gravel area and the slurry area to the vibroflotation rod, determining pressure detection positions of pressure mutation generated by the gravel area and the slurry area to the vibroflotation rod on the pressure sensor based on the pressure values, and determining the pressure detection positions of the pressure mutation as boundary positions of the gravel area and the slurry area; therefore, the gravel accumulation volume of the gravel area can be determined subsequently based on the boundary position of the gravel area and the slurry area, and the real blanking amount during each vibroflotation blanking can be measured.

Description

Technical Field

[0001] The present invention relates to the technical field of pile foundation construction, and in particular, to a vibroflotation device for gravel pile fillers and a method for measuring the filling quantity of vibroflotation gravel piles. Background Art

[0002] Vibroflotation gravel piles are an important engineering measure for soft soil foundation treatment. They achieve the effects of strengthening the foundation, improving drainage, and enhancing the anti-seismic liquefaction weakening ability by replacing the original soft foundation soil with gravel materials and vibro-compacting the foundation soil. The filling quantity is one of the key indicators for construction process control and pile quality analysis. The existing technology can only count the feeding quantity at the orifice and use the orifice feeding quantity as the filling quantity. However, there will inevitably be a certain height of uncompacted gravel material source accumulated above the vibroflotator, that is, the orifice feeding in a certain period is not all squeezed into the current vibroflotation working hole section. The gravel materials used for vibro-compaction and densification in the current hole section may partially come from the previous period, and the insufficient part comes from the orifice feeding in the current period. This will result in the inability to obtain the true feeding quantity for each construction. Summary of the Invention

[0003] In view of this, the embodiments of the present disclosure expect to provide a vibroflotation device for gravel pile fillers and a method for measuring the filling quantity of vibroflotation gravel piles.

[0004] The technical solution of the present disclosure is realized as follows:

[0005] In a first aspect, the present disclosure provides a vibroflotation device for gravel pile fillers.

[0006] The vibroflotation device for gravel pile fillers provided by the embodiments of the present disclosure includes:

[0007] A vibroflotation head, placed in the filling area, for filling the filling area with gravel by vibrating in the filling area;

[0008] A vibroflotation rod, fixedly connected to the vibroflotation head;

[0009] Wherein, a pressure sensor is distributed along the length extension direction of the vibroflotation rod on the outer side of the vibroflotation rod; the vibroflotation rod is used to be placed in the gravel area and the mud area; the pressure sensor is used to detect the pressure value generated by the gravel area and the mud area on the vibroflotation rod;

[0010] A pressure analysis terminal, electrically connected to the pressure sensor, for obtaining the pressure value generated by the gravel area and the mud area on the vibroflotation rod, and determining the pressure detection position where the pressure generated by the gravel area and the mud area on the pressure sensor has a pressure mutation based on the pressure value, and determining the pressure detection position of the pressure mutation as the demarcation position between the gravel area and the mud area.

[0011] In some embodiments, there are multiple pressure sensors; the multiple pressure sensors are evenly distributed at intervals around the vibroflotation rod; wherein,

[0012] Each pressure sensor is used to obtain the pressure values at multiple position points of the vibroflotation rod within a predetermined measurement stroke; the multiple position points are distributed along the length extension direction of the vibroflotation rod within the predetermined measurement stroke.

[0013] In some embodiments, the pressure analysis terminal is specifically used for

[0014] Based on the pressure values at multiple position points of the vibroflotation rod within a predetermined measurement stroke, determine the average pressure value corresponding to each position point among the multiple position points;

[0015] Perform maximum value normalization processing on the average pressure values corresponding to each position point among the multiple position points to obtain the normalized average pressure value corresponding to each position point;

[0016] Based on the normalized average pressure values corresponding to each position point, determine the pressure detection position of the pressure sensor when the normalized average pressure value changes suddenly;

[0017] Determine that the pressure detection position of the pressure sensor when the normalized average pressure value changes suddenly is the pressure detection position where the crushed stone area and the mud area on the pressure sensor cause a sudden change in pressure on the vibroflotation rod.

[0018] In some embodiments, a plurality of mounting grooves are evenly distributed at intervals in the circumferential rod area of the vibroflotation rod within a predetermined measurement stroke; the pressure sensors are located in the mounting grooves; a rubber gasket and a protective cover are sequentially distributed outside the pressure sensors; the rubber gasket and the protective cover cover the pressure sensors.

[0019] In a second aspect, the present disclosure provides a method for measuring the filling amount of a vibroflotation gravel pile, which measures the filling amount based on the vibroflotation device described in the first aspect above. The method includes:

[0020] Based on the vibroflotation device, obtain the pressure values generated by the crushed stone area and the mud area on the vibroflotation rod during the T-th vibroflotation filling process, and based on the pressure values generated by the crushed stone area and the mud area on the vibroflotation rod, determine the pressure detection position where the crushed stone area and the mud area on the pressure sensor cause a sudden change in pressure on the vibroflotation rod;

[0021] Based on the pressure detection position where the crushed stone area and the mud area on the pressure sensor cause a sudden change in pressure on the vibroflotation rod during the T-th vibroflotation filling process, and the upper edge position of the vibroflotator head, determine the crushed stone height of the crushed stone area;

[0022] Determine the regional volume of the gravel area based on the gravel height of the gravel area and the cross-sectional area of the regional section of the gravel area;

[0023] Determine the gravel accumulation volume of the gravel area based on the regional volume of the gravel area and the volume of the vibroflotation rod;

[0024] Determine the filling amount of the T-th vibroflotation gravel pile based on the feeding volume at the T-th vibroflotation pile mouth, the gravel accumulation volume of the gravel area, and the volume of the vibroflotation head.

[0025] In some embodiments, there are multiple pressure sensors; the multiple pressure sensors are evenly distributed at intervals around the vibroflotation rod; wherein,

[0026] Each pressure sensor is used to obtain the pressure values at multiple position points of the vibroflotation rod within a predetermined measurement stroke; the multiple position points are distributed along the length extension direction of the vibroflotation rod within the predetermined measurement stroke;

[0027] The method for determining the pressure detection position where the gravel area and the mud area cause a pressure mutation on the vibroflotation rod based on the pressure values generated by the gravel area and the mud area on the vibroflotation rod includes:

[0028] Based on the pressure values generated by the gravel area and the mud area on the vibroflotation rod detected by the multiple pressure sensors, determine the average pressure value corresponding to each position point among the multiple position points;

[0029] Perform maximum normalization processing on the average pressure values corresponding to each position point among the multiple position points to obtain the normalized average pressure value corresponding to each position point;

[0030] Based on the normalized average pressure values corresponding to each position point, determine the pressure detection position of the pressure sensor when the normalized average pressure value mutates;

[0031] Determine the pressure detection position of the pressure sensor when the normalized average pressure value mutates as the pressure detection position where the gravel area and the mud area cause a pressure mutation on the vibroflotation rod.

[0032] In some embodiments, before determining the filling amount of the T-th vibroflotation gravel pile based on the feeding volume at the T-th vibroflotation pile mouth, the gravel accumulation volume of the gravel area, and the volume of the vibroflotation head, the method includes:

[0033] Obtain the cumulative feeding volume at the vibroflotation pile mouth at the t-th moment and the cumulative feeding volume at the vibroflotation pile mouth at the (t - 1)-th moment;

[0034] Determine the volume of the T-th vibrating stone column's material feeding at the pile mouth based on the cumulative volume of the vibrating stone column's material feeding at the pile mouth at the t-th moment and the cumulative volume of the vibrating stone column's material feeding at the pile mouth at the (t - 1)-th moment.

[0035] In some embodiments, the maximum normalization process for the average pressure values respectively corresponding to each position point among the multiple position points to obtain the normalized average pressure values respectively corresponding to each position point includes:

[0036] Dividing the average pressure value respectively corresponding to each position point among the multiple position points by the maximum value of the average pressure values among the position points to obtain the normalized average pressure value respectively corresponding to each position point;

[0037] The determining of the pressure detection position of the pressure sensor corresponding to the mutation of the normalized average pressure value based on the normalized average pressure values respectively corresponding to each position point includes:

[0038] Arranging the normalized average pressure values respectively corresponding to each position point in a sequence along the depth of the vibrating rod, and determining the pressure detection position corresponding to the difference between the normalized average pressure values at adjacent position points exceeding a predetermined value as the pressure detection position of the pressure sensor corresponding to the mutation of the normalized average pressure value.

[0039] In some embodiments, the determining of the T-th vibrating stone column's filling material quantity based on the T-th volume of the vibrating stone column's material feeding at the pile mouth, the accumulated volume of the crushed stones in the crushed stone area, and the volume of the vibrating head includes:

[0040] The T-th volume of the vibrating stone column's material feeding at the pile mouth Q T - The accumulated volume of the crushed stones in the crushed stone area Q 堆 - The volume of the vibrating head Q0 = the T-th vibrating stone column's filling material quantity Q 真t .

[0041] In some embodiments, the determining of the T-th volume of the vibrating stone column's material feeding at the pile mouth based on the cumulative volume of the vibrating stone column's material feeding at the pile mouth at the t-th moment and the cumulative volume of the vibrating stone column's material feeding at the pile mouth at the (t - 1)-th moment includes:

[0042] The cumulative volume of the vibrating stone column's material feeding at the pile mouth at the t-th moment Q λt - The cumulative volume of the vibrating stone column's material feeding at the pile mouth at the (t - 1)-th moment Q λt_1 = The T-th volume of the vibrating stone column's material feeding at the pile mouth Q T .

[0043] A vibroflotation device for gravel pile fillers according to an embodiment of the present disclosure includes: a vibroflotation head placed in the filling area for filling the filling area with gravel by vibrating in the filling area; a vibroflotation rod fixedly connected to the vibroflotation head; wherein, a pressure sensor is distributed on the outer side of the vibroflotation rod along the extending direction of the length of the vibroflotation rod; the vibroflotation rod is used to be placed in the gravel area and the mud area; the pressure sensor is used to detect the pressure value generated by the gravel area and the mud area on the vibroflotation rod; a pressure analysis terminal is electrically connected to the pressure sensor for obtaining the pressure value generated by the gravel area and the mud area on the vibroflotation rod, and determining the pressure detection position where the pressure generated by the gravel area and the mud area on the vibroflotation rod mutates on the pressure sensor, and determining the pressure detection position where the pressure mutates as the demarcation position between the gravel area and the mud area. In the present application, the vibroflotation device can be used for measuring the filling amount of gravel piles. When measuring the filling amount, the pressure value generated by the gravel area and the mud area on the vibroflotation rod can be obtained through the vibroflotation device, and the pressure detection position where the pressure generated by the gravel area and the mud area on the vibroflotation rod mutates on the pressure sensor can be determined based on the pressure value, and the pressure detection position where the pressure mutates is determined as the demarcation position between the gravel area and the mud area, so as to subsequently determine the gravel accumulation volume in the gravel area and the true feeding amount measurement during each vibroflotation feeding based on the demarcation position between the gravel area and the mud area. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 is a schematic diagram of the operation of a vibroflotation device for gravel pile fillers shown according to an exemplary embodiment;

[0045] Figure 2 is a schematic cross-sectional view of a vibroflotation rod shown according to an exemplary embodiment;

[0046] Figure 3 is a partially enlarged schematic cross-sectional view of a vibroflotation rod shown according to an exemplary embodiment;

[0047] Figure 4 is a normalized pressure value - depth curve graph shown according to an exemplary embodiment;

[0048] Figure 5 is a flowchart of a method for measuring the filling amount of vibroflotation gravel piles shown according to an exemplary embodiment;

[0049] Figure 6 A flowchart of measuring the filling amount of vibroflotation gravel piles shown according to an exemplary embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0050] The present invention will be further described in detail below with reference to the accompanying drawings. The following specific implementation steps can enable those skilled in the art to understand the present invention more comprehensively, but do not limit the present invention in any form.

[0051] Vibroflotation gravel piles are an important engineering measure for soft soil foundation treatment. They achieve the effects of strengthening the foundation, improving drainage, and enhancing the ability to resist seismic liquefaction weakening by replacing the original soft foundation soil with gravel and vibrating and compressing the foundation soil. The filling volume is one of the key indicators for construction process control and pile quality analysis. The existing technology can only count the feeding volume at the orifice and use the orifice feeding volume as the filling volume. However, there will inevitably be a certain height of uncompacted gravel source piled up above the vibroflot, that is, the orifice feeding in a certain period is not all squeezed into the hole section where the vibroflot is working currently. The gravel used for vibrating and compacting the current hole section may partly come from the previous period, and the insufficient part comes from the orifice feeding in the current period. This will result in the inability to obtain the true feeding volume for each construction.

[0052] In view of the above situation, the present disclosure provides a vibroflot for gravel pile filling. Figure 1 It is a working schematic diagram of a vibroflot for gravel pile filling shown according to an exemplary embodiment. As Figure 1 shown, the vibroflot for gravel pile filling includes:

[0053] A vibroflot head 6, placed in the filling area 8, for filling the filling area with gravel by vibrating in the filling area;

[0054] A vibroflot rod 4, fixedly connected to the vibroflot head 6;

[0055] Wherein, a pressure sensor 1 is distributed on the outer side of the vibroflot rod 4 along the length extension direction of the vibroflot rod; the vibroflot rod 4 is used to be placed in the gravel area 7 and the mud area 71; the pressure sensor 1 is used to detect the pressure value generated by the gravel area 7 and the mud area 71 on the vibroflot rod 4;

[0056] A pressure analysis terminal 2, electrically connected to the pressure sensor 1 through a wire 3, for obtaining the pressure value generated by the gravel area and the mud area on the vibroflot rod, and determining the pressure detection position where the pressure generated by the gravel area and the mud area on the pressure sensor mutates based on the pressure value, and determining the pressure detection position of the pressure mutation as the boundary position between the gravel area and the mud area.

[0057] In this exemplary embodiment, the pressure sensor can be a flexible strip-shaped thin film pressure sensor array, linearly embedded on the outer side of the vibroflot rod, for detecting the pressure values generated by the gravel area and the mud area at multiple position points within a predetermined measurement stroke on the vibroflot rod.

[0058] In this exemplary embodiment, Figure 2 It is a cross-sectional schematic diagram of a vibroflot rod shown according to an exemplary embodiment; Figure 3 It is a partial enlarged cross-sectional schematic diagram of a vibroflot rod shown according to an exemplary embodiment. As Figure 2 andFigure 3 As shown, a plurality of mounting grooves 41 are evenly distributed in the annular rod region of the vibroflotation rod within a predetermined measurement stroke; the pressure sensor 1 is located within the mounting groove 41; a rubber gasket 12 and a protective cover 11 are sequentially distributed outside the pressure sensor 1; the rubber gasket 12 and the protective cover 11 cover the pressure sensor 1. That is, the protective cover covers the opening of the mounting groove. Preferably, the protective cover is a fine flexible alloy metal mesh, which can prevent the crushed stone from scratching and damaging the pressure sensor without affecting the pressure transmission. An elastic rubber gasket 12 is arranged between the pressure sensor and the metal mesh, which can further protect the pressure sensor while effectively transmitting the lateral pressure, and is beneficial to improving the durability of the pressure sensor under complex service conditions such as ultra-deep holes and crushed stone impact. Among them, the crawler crane 5 and the crane are located on the original soft foundation soil 9.

[0059] As Figure 2 and Figure 3 shown, after the pressure sensor 1, the rubber gasket 12 and the protective cover 11 are installed, they are in a tightly fitting state with each other, and the outer surface of the protective cover coincides with the outer surface of the vibroflotation rod 4, so that the cross-section of the vibroflotation rod provided with the pressure sensor is still a standard circular surface. This is beneficial to effectively reducing the mechanical resistance during the insertion and lifting of the guide rod and improving the durability of the protective cover and the detailed structure.

[0060] Preferably, the piezoresistive material of the pressure sensor is an alloy film based on the piezoresistive effect. As an alternative, the piezoresistive material can also be a thin-film capacitor based on the capacitance effect, a ceramic film based on the piezoelectric effect, etc. A polyurethane protective layer is arranged on the surface of the piezoresistive material of the pressure sensor, which plays a role in protecting the sensor and effectively transmitting the pressure.

[0061] In this exemplary embodiment, according to the pressure values generated by the crushed stone area and the mud area on the vibroflotation rod on the pressure sensor, analyze the pressure changes of the crushed stone area and the mud area on the vibroflotation rod, determine the pressure detection positions where the pressure sensors on the crushed stone area and the mud area generate pressure mutations on the vibroflotation rod, and determine the pressure detection positions of the pressure mutations as the boundary positions between the crushed stone area and the mud area, so as to subsequently determine the crushed stone accumulation volume in the crushed stone area based on the boundary positions between the crushed stone area and the mud area and determine the actual feeding amount during each vibroflotation feeding based on the feeding volume and the crushed stone accumulation volume during each vibroflotation feeding.

[0062] In some embodiments, there are a plurality of the pressure sensors; the plurality of pressure sensors are evenly distributed around the vibroflotation rod at intervals; among them,

[0063] each of the pressure sensors is used to obtain the pressure values at multiple position points of the vibroflotation rod within a predetermined measurement stroke; the multiple position points are distributed along the length extension direction of the vibroflotation rod within the predetermined measurement stroke.

[0064] In this exemplary embodiment, the multiple position points may be consecutive points to facilitate improving the measurement accuracy of the pressure mutation position points. Among them, it can be understood that the depth direction of the vibroflotation rod inserted from top to bottom is the extending direction along the length of the vibroflotation rod.

[0065] Among them, the layout method of the pressure sensors adopts a redundant design. Preferably, the number of pressure sensors arranged is three, and they are arranged at intervals of 120° along the axial plane of the guide rod (as Figure 2 shown). As an alternative, the number of pressure sensors arranged can be more than three, and they are arranged at equal angular intervals on the surface of the guide rod. The redundant design, on the one hand, ensures that there are still sensors available for data acquisition when a certain sensor is damaged, guaranteeing the working stability of the monitoring device under harsh service conditions. On the other hand, by taking the average value of the measured values of multiple sensors at the same position point, it reduces the influence of outliers and the unevenness of the top surface of the crushed stone on the measurement results, which is beneficial to improving the usability and reliability of the monitoring results.

[0066] In some embodiments, the pressure analysis terminal is specifically used for

[0067] Based on the pressure values at multiple position points of the vibroflotation rod within a predetermined measurement stroke, determining the average pressure value corresponding to each position point among the multiple position points;

[0068] Performing maximum normalization processing on the average pressure values corresponding to each position point among the multiple position points to obtain the normalized average pressure value corresponding to each position point;

[0069] Based on the normalized average pressure values corresponding to each position point, determining the pressure detection position of the pressure sensor when the normalized average pressure value mutates;

[0070] Determining the pressure detection position of the pressure sensor when the normalized average pressure value mutates as the pressure detection position where the crushed stone area and the mud area on the pressure sensor generate a pressure mutation on the vibroflotation rod.

[0071] In this exemplary embodiment, multiple pressure sensors can obtain the pressure values of the gravel area and the mud area on the vibrating compaction rod at multiple position points within a predetermined measurement stroke. For example, multiple position points of the vibrating compaction rod within the predetermined measurement stroke include the first position point, the second position point, the third position point, etc. from top to bottom in depth. The multiple pressure sensors are arranged in a surrounding manner, including the first pressure sensor, the second pressure sensor, the third pressure sensor, etc. The first pressure sensor obtains the first pressure value at the first position point, the first pressure value at the second position point, and the first pressure value at the third position point. The second pressure sensor obtains the second pressure value at the first position point, the second pressure value at the second position point, and the second pressure value at the third position point. The third pressure sensor obtains the third pressure value at the first position point, the third pressure value at the second position point, and the third pressure value at the third position point. Then, the average value AP of the measured values of the pressure sensors at the same position point is determined. ht , and the calculation formula is: In the formula, P hti is the pressure value measured by the i-th sensor at the position point h at time t, and N is the total number of pressure sensors.

[0072] Among them, the pressure average value is normalized by the maximum value, and the calculation formula is: AP htN = AP ht / maxAP ht . Among them, AP htN is the normalized average pressure value, and maxAP ht is the maximum value among the average pressure values corresponding to each position point within the entire predetermined measurement stroke.

[0073] Then, based on the normalized average pressure values corresponding to each position point, the pressure detection position of the pressure sensor corresponding to the mutation of the normalized average pressure value can be determined, so as to determine that the pressure detection position of the pressure sensor corresponding to the mutation of the normalized average pressure value is the pressure detection position where the gravel area and the mud area generate a pressure mutation on the vibrating compaction rod. Figure 4 is a normalized pressure value - depth curve diagram shown according to an exemplary embodiment. As Figure 4 shown, a significant pressure mutation occurs at the top surface position h 0t of the gravel, that is, the top surface position h 0t is the pressure detection position where the vibrating compaction rod generates a pressure mutation. That is, the boundary position between the gravel area and the mud area is determined through the pressure detection position where the vibrating compaction rod generates a pressure mutation, that is, the top surface position h 0t .

[0074] The present disclosure provides a method for measuring the filling quantity of vibro - gravel columns. Figure 5 is a flowchart of a method for measuring the filling quantity of vibro - gravel columns shown according to an exemplary embodiment. As Figure 5As shown, based on the vibroflotation device described in the above embodiments, the method for measuring the filling amount includes:

[0075] Step 50: Based on the vibroflotation device, obtain the pressure values generated by the gravel area and the mud area on the vibroflotation rod during the T-th vibroflotation filling process, and based on the pressure values generated by the gravel area and the mud area on the vibroflotation rod, determine the pressure detection positions where the gravel area and the mud area cause pressure mutations on the pressure sensor.

[0076] Step 51: Based on the pressure detection positions where the gravel area and the mud area cause pressure mutations on the pressure sensor during the T-th vibroflotation filling process and the upper edge position of the vibroflotation head, determine the gravel height in the gravel area.

[0077] Step 52: Based on the gravel height in the gravel area and the cross-sectional area of the gravel area, determine the volume of the gravel area.

[0078] Step 53: Based on the volume of the gravel area and the volume of the vibroflotation rod, determine the accumulated volume of the gravel in the gravel area.

[0079] Step 54: Based on the volume of the material fed into the pile mouth during the T-th vibroflotation, the accumulated volume of the gravel in the gravel area, and the volume of the vibroflotation head, determine the filling amount of the vibroflotation gravel pile during the T-th vibroflotation.

[0080] In this exemplary embodiment, the filling amount of the vibroflotation gravel pile during the T-th vibroflotation = the volume of the material fed into the pile mouth during the T-th vibroflotation - the accumulated volume of the gravel in the gravel area - the volume of the vibroflotation head.

[0081] In this exemplary embodiment, before determining the filling amount of the vibroflotation gravel pile during the T-th vibroflotation based on the volume of the material fed into the pile mouth during the T-th vibroflotation, the accumulated volume of the gravel in the gravel area, and the volume of the vibroflotation head, the method includes:

[0082] Obtain the cumulative volume of the material fed into the pile mouth at the t-th moment and the cumulative volume of the material fed into the pile mouth at the (t - 1)-th moment.

[0083] Based on the cumulative volume of the material fed into the pile mouth at the t-th moment and the cumulative volume of the material fed into the pile mouth at the (t - 1)-th moment, determine the volume of the material fed into the pile mouth during the T-th vibroflotation.

[0084] In this exemplary embodiment, the cumulative volume of the material fed into the pile mouth at the t-th moment - the cumulative volume of the material fed into the pile mouth at the (t - 1)-th moment = the volume of the material fed into the pile mouth during the T-th vibroflotation.

[0085] In this application, the measurement of the filling quantity is carried out by means of the vibroflotation device described in the above embodiments. A pressure sensor and a pressure analysis terminal are connected by a wire. The pressure sensor is linearly embedded in the outer wall of the guide rod along the depth direction of the vibroflotation rod of the vibroflotation gravel pile construction equipment. Combining with the measurement method, the position of the top surface of the gravel material in the hole can be determined. This method solves the problem that the actual filling quantity cannot be obtained during the construction of the vibroflotation gravel pile at present, and can provide a basic support for the precise control of the construction process and the evaluation of the pile forming quality, and has important engineering application value and economic benefits.

[0086] In some embodiments, there are a plurality of the pressure sensors; the plurality of the pressure sensors are evenly distributed around the vibroflotation rod at intervals; wherein,

[0087] each of the pressure sensors is used to obtain the pressure values at multiple position points within a predetermined measurement stroke of the vibroflotation rod; the multiple position points are distributed along the length extension direction of the vibroflotation rod within the predetermined measurement stroke;

[0088] Determining the pressure detection position where the pressure of the gravel area and the mud area on the vibroflotation rod changes suddenly based on the pressure values generated by the gravel area and the mud area on the vibroflotation rod includes:

[0089] Based on the pressure values generated by the gravel area and the mud area on the vibroflotation rod detected by the plurality of the pressure sensors, determining the average pressure value corresponding to each position point among the multiple position points;

[0090] Performing maximum normalization processing on the average pressure values corresponding to each position point among the multiple position points to obtain the normalized average pressure value corresponding to each position point;

[0091] Based on the normalized average pressure values corresponding to each position point, determining the pressure detection position of the pressure sensor when the normalized average pressure value changes suddenly;

[0092] Determining the pressure detection position of the pressure sensor when the normalized average pressure value changes suddenly as the pressure detection position where the pressure of the gravel area and the mud area on the vibroflotation rod changes suddenly.

[0093] In this exemplary embodiment, multiple pressure sensors can obtain the pressure values at multiple position points of the vibroflotation rod in the gravel area and the mud area within a predetermined measurement stroke. For example, multiple position points of the vibroflotation rod within the predetermined measurement stroke include a first position point, a second position point, a third position point, etc. from top to bottom in depth. The multiple pressure sensors surround and include a first pressure sensor, a second pressure sensor, a third pressure sensor, etc. The first pressure sensor obtains the first pressure value at the first position point, the first pressure value at the second position point, and the first pressure value at the third position point. The second pressure sensor obtains the second pressure value at the first position point, the second pressure value at the second position point, and the second pressure value at the third position point. The third pressure sensor obtains the third pressure value at the first position point, the third pressure value at the second position point, and the third pressure value at the third position point. Then, the average value AP of the measured values of the pressure sensors at the same position point is determined. ht , and the calculation formula is: In the formula, P hti is the pressure value measured by the i-th sensor at the position point h at time t, and N is the total number of pressure sensors.

[0094] Among them, the average pressure value is normalized by the maximum value, and the calculation formula is: AP htN = AP ht / maxAP ht . Among them, AP htN is the normalized average pressure value, and maxAP ht is the maximum value among the average pressure values corresponding to each position point within the entire predetermined measurement stroke.

[0095] Then, based on the normalized average pressure values corresponding to each position point, the pressure detection position of the pressure sensor corresponding to the mutation of the normalized average pressure value can be determined, so as to determine that the pressure detection position of the pressure sensor corresponding to the mutation of the normalized average pressure value is the pressure detection position where the gravel area and the mud area generate a pressure mutation on the vibroflotation rod on the pressure sensor.

[0096] In some embodiments, the maximum value normalization process is performed on the average pressure values corresponding to each position point among the multiple position points to obtain the normalized average pressure values corresponding to each position point, including:

[0097] The average pressure value corresponding to each position point among the multiple position points is divided by the maximum value among the average pressure values of each position point to obtain the normalized average pressure value corresponding to each position point;

[0098] The determination of the pressure detection position of the pressure sensor corresponding to the mutation of the normalized average pressure value based on the normalized average pressure values corresponding to each position point includes:

[0099] Arrange the normalized average pressure values corresponding to each of the above positions along the depth of the vibroflotation rod in a sequence, and determine the pressure detection position of the pressure sensor corresponding to the mutation of the normalized average pressure value as the pressure detection position where the difference between the normalized average pressure values at adjacent position points exceeds a predetermined value.

[0100] In this exemplary embodiment, when the difference between the normalized average pressure values at adjacent position points exceeds a predetermined value, it indicates that a pressure value mutation has occurred at the adjacent position points. The pressure values of other adjacent position points change less, but the pressure values of the adjacent position points here change more. Therefore, it can be determined that the position point detected by the pressure sensor is the pressure detection position where the gravel area and the mud area on the pressure sensor cause a pressure mutation to the vibroflotation rod.

[0101] In this exemplary embodiment, determining the filling amount of the vibroflotation gravel pile for the T-th vibroflotation based on the volume of the material fed at the pile mouth for the T-th vibroflotation, the accumulated volume of the gravel in the gravel area, and the volume of the vibroflotation head includes:

[0102] The volume of the material fed at the pile mouth for the T-th vibroflotation Q T - The accumulated volume of the gravel in the gravel area Q 堆 - The volume of the vibroflotation head Q0 = the filling amount of the vibroflotation gravel pile for the T-th vibroflotation Q 真t 。

[0103] In this exemplary embodiment, determining the volume of the material fed at the pile mouth for the T-th vibroflotation based on the cumulative volume of the material fed at the pile mouth at the t-th moment and the cumulative volume of the material fed at the pile mouth at the (t - 1)-th moment includes:

[0104] The cumulative volume of the material fed at the pile mouth at the t-th moment Q λt - The cumulative volume of the material fed at the pile mouth at the (t - 1)-th moment Q λt_1 = The volume of the material fed at the pile mouth for the T-th vibroflotation Q T 。

[0105] In this exemplary embodiment, Figure 6 According to the flowchart of measuring the filling amount of the vibroflotation gravel pile shown in an exemplary embodiment. As Figure 6 shown, the process of measuring the filling amount of the vibroflotation gravel pile includes:

[0106] S1: Calculate the cumulative volume of the material fed at the pile mouth at the t-th moment Q λt and the cumulative volume of the material fed at the pile mouth at the (t - 1)-th moment Q λt_1 。

[0107] The amount of the material fed at the orifice is statistically converted by counting the hopper on the ground. Specifically, the cumulative values of the amount of the material fed at the orifice at the t-th moment and the (t - 1)-th moment are Q λt = n * V0 and Q λt_1=(n - 1)*V0. Where, V0 is the hopper volume and n is the number of upper hoppers.

[0108] S2: Calculate the accumulated height h of the crushed stone above the vibroflot at time t t , which specifically includes the following steps:

[0109] S21: Obtain the position h of the top surface of the crushed stone in the hole 0t , which specifically includes the following steps:

[0110] S211: Obtain the measured values of all normally working pressure sensors.

[0111] S212: Calculate the average value AP of the measured values of the pressure sensors at the same elevation ht , and the calculation formula is: In the formula, P hti is the pressure value measured by the i-th sensor at the position point h at time t, and N is the total number of pressure sensors.

[0112] S213: Perform maximum normalization on the average pressure value, and the calculation formula is: AP htN = AP ht / maxAP ht . Where, AP htN is the normalized average pressure value, and maxAP ht is the maximum value among the average pressure values corresponding to each position point within the entire predetermined measurement stroke.

[0113] S214: Arrange the normalized average pressure values in a sequence along the depth, and the elevation corresponding to the mutation of the normalized average pressure value is the position h of the top surface of the crushed stone in the hole 0t (as Figure 4 shown). The normalized relative value is easier to analyze;

[0114] S22: Obtain the position h of the vibroflot 1t . The position of the vibroflot 6 is obtained through a counter installed on the winch, and the position h of the vibroflot is determined by recording the length of the wire rope retracted and released 1t .

[0115] S23: Calculate the accumulated volume Q of the crushed stone above the vibroflot t = h 0t - h 1t .

[0116] S3: Calculate the accumulated volume Q of the crushed stone above the vibroflot 堆 Q 堆 , and the calculation formula is Q 堆 = 0.25π(D - d) 2 h t . Where, D is the hole diameter for pile formation and d is the outer diameter of the guide rod.

[0117] S4: Calculate the filling volume Q of the vibroflotation gravel pile for the T-th vibroflotation 真t , and the calculation formula is the volume Q of the material fed into the pile mouth for the T-th vibroflotation T - the accumulated volume Q of the gravel in the gravel area 堆 - the volume Q0 of the vibroflotation head = the filling volume Q of the vibroflotation gravel pile for the T-th vibroflotation 真t . Among them, Q0 is the volume of the vibroflotator

[0118] The display module is characterized in that it can display and update the time, cumulative material feeding volume, measured value of the pressure sensor, normalized average pressure, and filling volume in real time in the form of a table, and display the time-vibroflotation head buried depth-gravel aggregate height-cumulative material feeding volume-filling volume curve in the form of a curve graph

Claims

1. A vibroflotation device for gravel pile fillers, characterized in that, Including: A vibroflotation head, placed in the filling area, for filling the filling area with crushed stones by vibrating in the filling area; A vibroflotation rod, fixedly connected to the vibroflotation head; Wherein, pressure sensors are distributed on the outer side of the vibroflotation rod along the length extension direction of the vibroflotation rod; the vibroflotation rod is used to be placed in the crushed stone area and the mud area; the pressure sensors are used to detect the pressure values generated by the crushed stone area and the mud area on the vibroflotation rod; A pressure analysis terminal, electrically connected to the pressure sensors, for obtaining the pressure values generated by the crushed stone area and the mud area on the vibroflotation rod, and determining the pressure detection positions where the crushed stone area and the mud area generate pressure mutations on the pressure sensors based on the pressure values, and determining the pressure detection positions of the pressure mutations as the boundary positions between the crushed stone area and the mud area.

2. The vibroflotation device for gravel pile filler according to claim 1, wherein There are multiple of the pressure sensors; the multiple pressure sensors are evenly distributed around the vibroflotation rod at intervals; wherein, Each of the pressure sensors is used to obtain the pressure values at multiple position points within a predetermined measurement stroke of the vibroflotation rod; the multiple position points are distributed along the length extension direction of the vibroflotation rod within the predetermined measurement stroke.

3. The vibroflotation device for the gravel pile filler according to claim 2, characterized in that, The pressure analysis terminal is specifically used for Based on the pressure values at multiple position points within a predetermined measurement stroke of the vibroflotation rod, determining the average pressure values respectively corresponding to each position point among the multiple position points; Performing maximum value normalization processing on the average pressure values respectively corresponding to each position point among the multiple position points to obtain the normalized average pressure values respectively corresponding to each position point; Based on the normalized average pressure values respectively corresponding to each position point, determining the pressure detection positions of the pressure sensors corresponding to the mutations of the normalized average pressure values; Determining the pressure detection positions of the pressure sensors corresponding to the mutations of the normalized average pressure values as the pressure detection positions where the crushed stone area and the mud area generate pressure mutations on the pressure sensors.

4. The vibroflotation device for the gravel pile filler according to claim 2, wherein, Multiple installation grooves are evenly distributed at intervals in the circumferential rod area of the vibroflotation rod within a predetermined measurement stroke; the pressure sensors are located in the installation grooves; a rubber gasket and a protective cover are sequentially distributed outside the pressure sensors; the rubber gasket and the protective cover cover the pressure sensors.

5. A method for measuring the filling quantity of vibroflotation gravel piles, characterized in that, For measuring the filling amount based on the vibroflotation device according to claim 1, the method includes: Based on the vibroflotation device, obtaining the pressure values generated by the crushed stone area and the mud area on the vibroflotation rod during the T-th vibroflotation filling process, and determining the pressure detection positions where the crushed stone area and the mud area generate pressure mutations on the pressure sensors based on the pressure values generated by the crushed stone area and the mud area on the vibroflotation rod; Based on the pressure detection positions where the crushed stone area and the mud area generate pressure mutations on the pressure sensors during the T-th vibroflotation filling process, and the upper edge position of the vibroflotation head, determining the crushed stone height of the crushed stone area; Based on the crushed stone height of the crushed stone area and the cross-sectional area of the area of the crushed stone area, determining the volume of the area of the crushed stone area; Based on the volume of the area of the crushed stone area and the volume of the vibroflotation rod, determining the accumulated volume of the crushed stones in the crushed stone area; Determine the filling amount of the vibro-compaction gravel pile for the T-th time based on the volume of the material fed at the pile mouth during the T-th vibro-compaction, the accumulated volume of the gravel in the gravel area, and the volume of the vibro-compaction head.

6. The vibroflotation stone column filler volume measurement method according to claim 5, wherein There are multiple pressure sensors; the multiple pressure sensors are evenly distributed at intervals around the vibro-compaction rod; among them, each pressure sensor is used to obtain the pressure values at multiple position points within a predetermined measurement stroke of the vibro-compaction rod; the multiple position points are distributed along the length extension direction of the vibro-compaction rod within the predetermined measurement stroke; determining the pressure detection positions where the gravel area and the mud area generate pressure mutations on the vibro-compaction rod based on the pressure values generated by the gravel area and the mud area on the vibro-compaction rod includes: Based on the pressure values generated by the gravel area and the mud area on the vibro-compaction rod detected by the multiple pressure sensors, determine the average pressure value corresponding to each position point among the multiple position points; Perform maximum normalization processing on the average pressure values corresponding to each position point among the multiple position points to obtain the normalized average pressure values corresponding to each position point; Based on the normalized average pressure values corresponding to each position point, determine the pressure detection position of the pressure sensor corresponding to the mutation of the normalized average pressure value; Determine the pressure detection position of the pressure sensor corresponding to the mutation of the normalized average pressure value as the pressure detection position where the gravel area and the mud area generate pressure mutations on the vibro-compaction rod.

7. The vibroflotation gravel pile filler quantity measurement method according to claim 5, characterized in that, Before determining the filling amount of the vibro-compaction gravel pile for the T-th time based on the volume of the material fed at the pile mouth during the T-th vibro-compaction, the accumulated volume of the gravel in the gravel area, and the volume of the vibro-compaction head, the method includes: Obtain the cumulative volume of the material fed at the pile mouth at the t-th moment and the cumulative volume of the material fed at the pile mouth at the (t - 1)-th moment; Based on the cumulative volume of the material fed at the pile mouth at the t-th moment and the cumulative volume of the material fed at the pile mouth at the (t - 1)-th moment, determine the volume of the material fed at the pile mouth during the T-th vibro-compaction.

8. The vibroflotation gravel pile filler quantity measurement method according to claim 6, characterized in that, The performing maximum normalization processing on the average pressure values corresponding to each position point among the multiple position points to obtain the normalized average pressure values corresponding to each position point includes: Dividing the average pressure values corresponding to each position point among the multiple position points by the maximum value of the average pressure values among the position points to obtain the normalized average pressure values corresponding to each position point; The determining the pressure detection position of the pressure sensor corresponding to the mutation of the normalized average pressure value based on the normalized average pressure values corresponding to each position point includes: Arrange the normalized average pressure values corresponding to each position point in a sequence along the depth of the vibro-compaction rod, and determine the pressure detection position corresponding to the difference between the normalized average pressure values at adjacent position points exceeding a predetermined value as the pressure detection position of the pressure sensor corresponding to the mutation of the normalized average pressure value.

9. The vibroflotation gravel pile filler quantity measurement method according to claim 5, characterized in that, Determining the filling amount of the vibro-compaction gravel pile for the T-th time based on the volume of the material fed at the pile mouth during the T-th vibro-compaction, the accumulated volume of the gravel in the gravel area, and the volume of the vibro-compaction head includes: The volume Q of the material fed into the vibroflotation pile opening at the T-th time T - The accumulated volume Q of the crushed stones in the crushed stone area 堆 - The volume Q0 of the vibroflotation head = the filling quantity Q of the vibroflotation crushed stone pile at the T-th time 真t .

10. The vibroflotation gravel pile filler quantity measurement method according to claim 7, characterized in that, Determining the volume of the material fed into the vibroflotation pile opening at the T-th time based on the cumulative volume of the material fed into the vibroflotation pile opening at the t-th time and the cumulative volume of the material fed into the vibroflotation pile opening at the (t - 1)-th time includes: The cumulative volume of material fed into the vibroflotation pile mouth at the t-th moment, Q λt - The cumulative volume of material fed into the vibroflotation pile mouth at the (t - 1)-th moment, Q λt_1 = The volume of material fed into the vibroflotation pile mouth at the T-th time, Q T .

Images