CN117589632A - Method for testing water content in foundation water injection humidifying process through dynamic compaction - Google Patents
Method for testing water content in foundation water injection humidifying process through dynamic compaction Download PDFInfo
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Abstract
The invention belongs to the technical field of geotechnical engineering construction and detection, in particular to a method for testing the water content in the process of water injection and humidification of a dynamic compaction treatment foundation, which comprises the following steps: pre-excavating a water injection pit in a to-be-humidified field to drill a water injection hole, obtaining a mass water content detection value before humidification of the position and an optimal mass water content of a soil sample, sampling by a detection point to manufacture a remolded soil sample, and calibrating by a soil moisture meter to determine a calibration formula; burying a soil moisture meter at the detection point, detecting and calculating to obtain a volume moisture content detection value before humidification; installing a water injection device in the water injection hole, and detecting and calculating to obtain a detection value of the volume water content in the humidification process; and acquiring a mass water content detection value and a volume water content detection value of each detection point after humidification, and acquiring a water injection humidification effective influence range through comparison analysis with the mass water content detection value before humidification and the optimal mass water content of the soil sample. The method has the advantages of simple steps, strong operability, low economic cost and good use effect.
Description
Technical Field
The invention belongs to the technical field of geotechnical engineering construction and detection, and particularly relates to a method for testing water content in a dynamic compaction treatment foundation water injection humidifying process.
Background
The dynamic compaction method is widely applied to collapsible loess foundation treatment due to the advantages of simple construction, good reinforcement effect, economy in use and the like. The effect of eliminating loess collapsibility by dynamic compaction is closely related to the moisture content of the soil layer, and when the moisture content of the soil layer is low, water injection and humidification are required to be carried out on the soil layer before dynamic compaction, so that the moisture content of the soil layer is ensured to be near the optimal moisture content. The water injection humidification mode commonly adopted in the current engineering is to drill water injection holes, fill bean gravel in the holes, build cofferdams in a partition mode, determine single-hole water injection quantity according to a water injection quantity calculation formula in collapsible loess area building Standard, and perform water injection humidification. The current method for testing the water injection humidifying effect of the soil layer with low water content is to adopt a drilling machine or an artificial Luoyang shovel to drill holes for sampling at a certain time point before and after humidification, send the soil sample to a laboratory, measure the mass water content by adopting a drying method, compare the water content change of the soil layer before and after humidification, and judge the humidifying effect of the current water injection humidifying scheme. The current test of the water injection humidifying effect of the soil layer with low water content has the following problems: (1) The plane positions of sampling points of each drilling are different, the contrast of moisture content test data before and after humidification is poor, vertical pore channels are formed in soil layers during drilling, the permeation channels of the original soil layers are changed, and the accuracy of moisture content test results is affected; (2) Only the water content test data of a limited time point can be obtained, the continuous change process of the water content along with time cannot be obtained, if water content data of different humidification time periods are to be obtained, repeated drilling sampling and indoor test are required, and a large amount of manpower, material resources and time are consumed; (3) Only the water content test data of the limited point positions can be obtained, the influence depth and the influence radius of water injection humidification cannot be mastered exactly, the water migration diffusion path in the soil layer cannot be obtained completely, and the depth and plane arrangement of the water injection holes are difficult to optimize.
The soil moisture meter is an instrument widely applied to soil moisture content monitoring, and has the advantages of continuous fixed point, high measuring speed, high precision and the like. The monitoring principle of the soil moisture meter is that electromagnetic waves with certain frequency are emitted, the electromagnetic waves are transmitted along a probe, return after reaching the bottom, detect the voltage output by a probe, calculate the volume moisture content of a soil layer according to the relation between the output voltage and the moisture content, and calculate the mass moisture content commonly used in the geotechnical engineering field according to the functional relation between the volume moisture content and the mass moisture content. The soil moisture meter is used for testing the water injection and humidification process of the soil layer with low moisture content of the dynamic compaction treatment foundation, and the functional relation between the water content of the soil moisture meter and the water content of the soil layer with low moisture content and the water content of the soil mass is needed to be solved.
Disclosure of Invention
An object of the present invention is to provide a method for testing the moisture content of a dynamic compaction-treated foundation water injection humidifying process, and to provide at least the advantages to be described later.
The invention further aims to provide a method for testing the water content in the dynamic compaction treatment foundation water injection humidifying process, which has the advantages of simple steps, strong operability, low economic cost and good use effect.
The technical scheme of the invention is as follows:
the method for testing the water content of the dynamic compaction treatment foundation in the water injection and humidification process comprises the following steps:
pre-excavating a water injection pit in a site to be humidified, and drilling a water injection hole in the center of the water injection pit;
respectively arranging detection points at the bottom of the water injection hole and the water injection Kong Kongzhou, and acquiring a mass water content detection value before humidification and an optimal mass water content of a soil sample at the position;
sampling at a detection point, preparing a remolded soil sample, comparing the water content of the remolded soil sample measured by a soil moisture meter with the water content of the remolded soil sample measured by an indoor drying method, calibrating and determining a calibration formula of the remolded soil sample;
burying a soil moisture meter at the detection point, detecting and calculating to obtain a volume moisture content detection value before humidification;
installing a water injection device in the water injection hole, injecting design water into the water injection pit in batches until monitoring data of the soil moisture meters of the detection points tend to be stable, detecting in real time, and calculating to obtain a volumetric water content detection value in the humidifying process;
obtaining a mass moisture content detection value after humidification and a volume moisture content detection value after humidification of each detection point, carrying out linear regression on the mass moisture content detection value and the volume moisture content detection value before humidification, obtaining a conversion relation between the mass moisture content detection value and the volume moisture content detection value, further converting the volume moisture content detection value in the humidification process into the mass moisture content detection value in the humidification process one by one, drawing a mass moisture content graph in the humidification process, and obtaining a water injection humidification effective influence range through comparison analysis on the mass moisture content detection value before humidification and the optimal mass moisture content of a soil sample.
Preferably, in the method for testing the water content in the dynamic compaction treatment foundation water injection and humidification process, the diameter of the water injection pit is d, and the diameter of the water injection hole is d 1 The difference value between the quasi-humidification depth H and the water injection hole depth H is delta H, and the value range of the delta H is 2-4 m.
Preferably, in the method for testing the moisture content of the dynamic compaction treatment foundation water injection and humidification process, the arrangement process is as follows:
the detection point arrangement at the bottom of the water injection hole: after the water injection hole is formed, drilling is carried out at the bottom, a plurality of detection points are arranged, the distance between the detection point of the uppermost soil moisture meter and the bottom of the water injection hole is h1, and the vertical distance between the detection points is h1;
detection point arrangement of water injection Kong Kongzhou: 3-6 annular measuring lines are arranged around the water injection hole, the distance between the measuring lines is L, and the value range of the L is 0.5-1.0 m; 3 rays are led out from the center of the water injection pit, the included angle of the rays is 120 degrees, the intersection point of each annular measuring line and the rays is a vertical detecting point, a plurality of vertical detecting points are arranged from top to bottom, after the third annular measuring line, the uppermost part of each measuring line is reduced by one hole circumference detecting point, the uppermost detecting point forms an included angle of 45 degrees, and the vertical distance of each detecting point is h1.
Preferably, in the method for testing the water content of the dynamic compaction treatment foundation in the water injection and humidification process, sampling is performed at the space position of each detection point corresponding to the drilled hole, the soil sample is pressed into a sample preparation cylinder after being treated to prepare a remolded soil sample, and the soil moisture meter calibration is performed and a calibration formula is determined, wherein the concrete process is as follows:
calibration soilSample preparation: before sample preparation, air-drying and breaking a soil sample taken at a space position corresponding to a mass moisture content point before detection and humidification in the pore forming process of a water injection pore in a natural state, measuring the moisture content of the soil material, and preparing the soil materials with different moisture contents, wherein the moisture content range of the soil material is as follows: moisture content w at soil moisture measurement point nat Optimal water content w opt Saturated water content w sat ，w nat And w is equal to opt Between, w opt And w is equal to sat Respectively inserting at least 3 water content calibration points, mixing, choke-stopping and weighing the soil materials, controlling the dry density of the calibration soil samples according to the same dry density of the soil samples taken at the soil moisture measurement points, and pressing the soil materials into a sample preparation cylinder through a sample preparation device to prepare the calibration soil samples, wherein the diameter of the calibration soil samples is not less than 3 times of the diameter of a probe of a soil moisture meter, and the height of the probe of the soil moisture meter is not less than 2 times of the height of the probe of the soil moisture meter; and (3) preparing the saturated calibration soil sample under the optimal water content, and soaking and saturating the saturated calibration soil sample together with the sample preparation cylinder. When the water content is lower than the optimal water content, the sample preparation method is difficult, a layering tamping method is adopted, and the wool hanging treatment is carried out between all layering; the sample pressing method and the layering tamping method are disclosed in the geotechnical test method standard (GBT 50123-2019), wherein the sample pressing method refers to: the required wet soil is weighed out, the wet soil is poured into a sample pressing device, the surface of the soil sample is brushed flat, and the soil is pressed in by static pressure. The layering compaction method refers to: the required wet soil amount is weighed out, the wet soil is poured into the mould in batches and is fixed in a compaction device on the bottom plate, and the wet soil poured into the mould each time is compacted by a compaction method.
Calibrating: during testing, a probe of the soil moisture meter is inserted into a calibrated soil sample along the top surface of the soil column. After the test is finished, the probe is pulled out, soil is taken out in the measuring range of the probe, and the mass water content is measured by adopting a drying method; preparing a soil sample by adopting a soil material with optimal water content, inserting a probe of a soil moisture meter into the soil sample, airing the soil sample in a natural state, controlling the water content by the length of the airing time, sealing and preserving for 1 week together with a probe of the soil moisture meter, and finally measuring the volume water content of the sample by adopting the soil moisture meter and a drying method respectively;
calibration curve determination: same calibration soil sampleThe volume moisture content of (2) is measured by a soil moisture meter v And a test value theta by a drying method w Data are fitted by adopting unitary cubic curve, and a fitting formula is as follows(1) Wherein, the method comprises the steps of, wherein,a，b，c，dare fitting coefficients.
Preferably, in the method for testing the water content of the dynamic compaction treatment foundation in the water injection and humidification process, the soil moisture meter burying process is as follows:
soil moisture meters are mounted to the earth column: taking soil samples near each detection point position and preparing a soil column, wherein the diameter of the soil column is smaller than that of a drilled hole, inserting a probe of a soil moisture meter into the top of the soil column, carrying out external shaping and fixing by using a permeable gauze, and filling the inside with loess to finish the installation of the soil moisture meter;
and (3) positioning a soil moisture meter and backfilling the embedded holes: the soil moisture meter is lowered to a preset position by using a lifting rope from bottom to top in the drilling hole, soil backfilling is carried out on the soil body taken out in the original drilling hole in the range of 20 cm-30 cm above and below the soil moisture meter mounting soil sample, the lifting rope is sleeved on a lifting ring of the rammer for tamping, the soil moisture meter is lowered after the soil moisture meter is tamped to the position of the next detection point, and the soil moisture meter mounting is completed sequentially.
Preferably, in the method for testing the water content in the dynamic compaction treatment foundation water injection and humidification process, the water injection device structure comprises: the water injection device comprises a water level pipe, a pressure type water level gauge, a water supply pipe, a water meter and the like, and is installed as follows:
the water level pipe is lowered: the water level pipe is lowered in the water injection hole, wherein the pipe wall of the water level pipe below the ground is provided with a water permeable port and is wrapped by a gauze, the bottom of the water level pipe is flush with the bottom of the water injection hole, and the pipe orifice at the upper part is higher than the bottom h of the water injection pit 2 ；
And (3) lowering a pressure type water level gauge: a pressure type water level gauge is put down in a water level pipe to a position 20 cm-30 cm away from the bottom of the water level pipe, and a cable fixing clamp for fixing a cable of the water level gauge and a cable of a soil moisture gauge is used for fixing a top cap of a pipe orifice;
backfilling the water injection hole: the particle diameter d of the filling of the periphery of the water level pipe in the water injection hole 3 Is not limited to the following bean gravelStone, and said d 3 The grain diameter range of the catalyst is 0.5 mm-30.0 mm;
and (3) connecting a water supply pipe: the water filling pit is connected with a water supply pipe and is provided with a water meter for measuring the water injection quantity.
Preferably, in the method for testing the water content of the dynamic compaction treatment foundation water injection humidifying process,
obtaining an actual measurement value of the mass water content after humidification: drilling from top to bottom at the position which is on the same circular arc as the detection point around the hole and has the horizontal distance of 0.5 m-1.0 m by adopting drilling equipment until the position above each detection point is 10 cm-20 cm, taking a soil sample to a designated position by using a sampler, completing an indoor geotechnical test, and measuring the mass water content w of the soil sample 2 Measuring the measured value of the mass water content after humidification until all detection points are finished;
acquisition of volume water content detection value after humidification: after the water injection and humidification are completed, obtaining a detection value of the volume moisture content after humidification through a soil moisture meter at each detection point, wherein the detection value is obtained by calculating a soil moisture meter measurement value by adopting a calibration formula (1), sending data to a data acquisition box to complete the storage, so as to complete the acquisition of the detection data after the water injection and humidification, and recording as [ w ] 2 ，]。
Preferably, in the method for testing the water content in the dynamic compaction treatment foundation water injection humidifying process, the conversion relation between the mass water content detection value and the volume water content detection value is as follows:（2），for the detection value of the volume water content before humidification, < >>For the detection value of the volume water content of the humidification process, w 1 The water content of the product is the mass water content before humidification. .
Preferably, in the method for testing the water content in the dynamic compaction treatment foundation water injection humidifying process, the water injection humidifying effective influence range is obtained through comparing and analyzing the water content detection value of the quality before humidifying and the water content of the soil sample of the optimal quality, and the process is as follows:
acquiring a water injection humidifying process: increasing the mass water content w before humidification in the mass water content graph 1 In [0,w ] 1 ]Drawing a horizontal straight line for the datum point, wherein the vertical distance between the straight line and the curve is delta w, the delta w represents the humidification variation of the soil layer at a detection point at a certain moment, and when the delta w gradually tends to 0 along with the increase of the sampling time, the water injection and humidification of the soil layer are completed under the current water injection quantity;
repeating the steps for multiple times to obtain humidification variation of the positions of the detection points of the soil moisture meter, and obtaining a soil layer humidification process;
acquiring a water injection humidifying effective influence range: arranging a plurality of delta w tending to 0 time obtained in the last step from large to small, and determining the completion time t of soil layer water injection humidification max The completion time t of water injection and humidification of the soil layer max The horizontal distance between the monitoring data of the soil moisture meter reaching the optimal content at the same depth detection point position is the effective influence radius of water injection humidification;
repeating the steps for multiple times to obtain water injection humidifying influence radiuses of the detection points at multiple depths, and determining the effective influence range of water injection humidifying.
Preferably, in the method for testing the water content of the dynamic compaction treatment foundation water injection humidifying process,
the value range of the depth of the water injection pit is 0.3-0.5 m, and the value range of the diameter d of the water injection pit is the diameter corresponding to the single-hole treatment area; the diameter d of the water injection hole 1 The value range of (2) is 120 mm-160 mm;
vertical distance h of detection points 1 The range of the value of (2) is 1.0 m-1.5 m;
the water content and the dry density of the soil sample of the soil moisture meter column are consistent with those of the soil sample around the detection point;
the pipe orifice of the water level pipe is higher than the ground so as to facilitate later observation, and the height higher than the ground is h 2 And the height h above the ground 2 The range of the values is as follows0.4m～0.6m；
The soil sample sampled by drilling is undisturbed soil; the sampling number is two, and one is used for geotechnical test and calibration, and the other is used for manufacturing and installing soil samples.
The invention has the following beneficial effects:
1. the operation steps are simple, the design method is easy to realize, and the use effect is good.
2. The water injection humidifying process is monitored accurately in real time by arranging detection points of a soil moisture meter at the bottom of the water injection hole and around the water injection hole in an omnibearing manner.
3. Through the automatic monitoring of soil moisture meter, reduce manual operation's working strength, avoid personal error, improve monitoring accuracy. And uploading monitoring data to a data acquisition box in real time to realize the whole water injection humidification process monitoring.
4. Through an indoor calibration test, conversion of mass water content and volume water content is established, calibration of the soil moisture meter is realized, and the method is simple and low in cost.
5. The test method can provide a certain reference for the water injection humidification design parameters of the actual engineering, is convenient for evaluating the water injection humidification effect, is less limited by the field conditions, and has wide application prospect in the engineering.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a plan view of a soil moisture meter detection point arrangement in one embodiment of a method for testing the moisture content of a dynamic compaction treated foundation water injection humidifying process;
FIG. 2 is a cross-sectional view of a soil moisture meter detection point arrangement in one embodiment of a method for testing the moisture content of a dynamic compaction treated foundation water injection humidifying process provided by the invention;
FIG. 3 is a schematic view of a construction state of a dynamic compaction foundation water injection humidifying process in one embodiment of a water content testing method in which a water injection hole device is installed;
FIG. 4 is a schematic view of a construction state of a dynamic compaction foundation water injection humidifying process in a water content testing method according to an embodiment of the present invention when a soil moisture meter is buried;
FIG. 5 is a schematic diagram of a rammer in one embodiment of a method for testing water content in a dynamic compaction process of water injection and humidification of a foundation according to the present invention;
FIG. 6 is a flow chart diagram of a method for testing the water content in the process of water injection and humidification of a dynamic compaction treatment foundation provided by the invention;
FIG. 7 is a graph of automated soil moisture meter test results versus manual sampling test results.
Detailed Description
The present invention is described in further detail below with reference to the drawings to enable those skilled in the art to practice the invention by referring to the description.
It will be understood that terms, such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
As shown in fig. 1, 2, 3, 4, 5 and 6, the invention provides a method for testing the water content in the process of water injection and humidification of a dynamic compaction treatment foundation, which comprises the following steps:
step one, drilling a water injection hole: in a quasi-humidification field, a water injection pit 1 is pre-excavated, the diameter of the water injection pit 1 is d, a water injection hole 2 is drilled at the center of the test pit, and the diameter d of the water injection hole 2 1 The difference value between the pseudo-humidification depth H and the water injection hole depth H is delta H, and the value range of the delta H is 2-4 m;
step two, arranging detection points of a soil moisture meter: arranging detection points near the water injection hole, wherein the detection points are divided into a water injection hole bottom detection point 3 and a water injection Kong Kongzhou detection point 4, and the process is as follows:
step 201, arranging detection points at the bottom of a water injection hole: after the water injection hole is formed, drilling is carried out at the bottom, a plurality of detection points 3 are arranged, and the distance between the detection point 3 of the uppermost soil moisture meter and the bottom of the water injection hole is h 1 The vertical distance between each detection point 3 is equal to h 1 ；
Step 202, water injection Kong Kongzhou detection point arrangement: at the water injection4-6 annular measuring lines 5 are arranged around the hole, the distance between the measuring lines is L, and the value range of the L is 0.5-1.0 m; 3 rays 6 are led out from the center of the test pit, the included angle of the rays 6 is 120 degrees, the intersection point of each annular measuring line 5 and the rays 6 is a hole periphery detecting point 4, a plurality of hole periphery detecting points 4 are arranged from top to bottom, after the third annular measuring line 5, the uppermost part of each measuring line 5 is reduced by one hole periphery detecting point 4, the uppermost detecting point of the measuring line forms an included angle of 45 degrees, and the vertical distance of each detecting point 4 is h 1 ；
Calibrating a soil moisture meter: by manufacturing remolded soil samples, calibrating a soil moisture meter, the process is as follows:
step 301, preparing a calibrated soil sample: before sample preparation, air-drying and breaking the soil sample taken at the space position corresponding to the detection point in the pore forming process of the water injection hole in a natural state, measuring the water content of the soil material, and preparing the soil material with different water contents, wherein the water content range of the soil material is as follows: moisture content w at soil moisture measurement point nat Optimal water content w opt Saturated water content w sat ，w nat And w is equal to opt Between, w opt And w is equal to sat Respectively inserting at least 3 water content calibration points, mixing, choke-stopping and weighing the soil materials, controlling and calibrating the dry density of the soil samples according to the same dry density of the soil samples taken at the soil moisture measurement points, and pressing the soil materials into a sample cylinder through a sample preparation device, wherein the inner diameter of the sample preparation cylinder is not smaller than 3 times of the diameter of a 7 probe of a soil moisture meter, and the height of the 7 probe of the soil moisture meter is not smaller than 2 times of the height of the 7 probe of the soil moisture meter. And (3) preparing the saturated calibration soil sample under the optimal water content, and soaking and saturating the saturated calibration soil sample together with the sample preparation cylinder. When the water content is lower than the optimal water content, the sample preparation method is difficult, and the layering tamping method is adopted;
step 302, calibration: during the test, the probe of the soil moisture meter 7 is inserted into the centroid of the calibration soil sample. After the test is finished, the probe is pulled out, soil is taken out within the range of the influence depth of the probe, and the mass water content is measured by adopting a drying method. When the water content is low, the soil sample is difficult to prepare, the problems of crushing, soil particle scattering and the like are easy to occur, and meanwhile, more cracks are generated in the probe insertion process, so that the measurement result is influenced. Preparing a soil sample by adopting a soil material with optimal water content, inserting a probe of a soil moisture meter 7 into the soil sample, airing the soil sample in a natural state, controlling the water content by the length of the airing time, sealing and preserving for 1 week together with the probe of the soil moisture meter 7, and finally measuring the volume water content of the sample by adopting the soil moisture meter 7 and a drying method respectively;
step 303, calibration curve determination: soil moisture meter test value θ v And a water content test value theta by a drying method w The data adopts unitary cubic curve fitting, and the fitting formula is that(1) Wherein, the method comprises the steps of, wherein,a，b，c，dare fitting coefficients;
burying a soil moisture meter: drilling and sampling at the water injection hole bottom 3 and the water injection Kong Kongzhou detection point 4, burying the soil moisture meter 7, wherein the burying mode of the soil moisture meter can be executed by referring to ZL201310386168.6, and the process is as follows:
step 401, mounting a soil moisture meter 7 to the soil column: taking a soil sample near each detection point position and manufacturing an annular soil column 8, wherein the diameter of the soil column is smaller than that of a drilling hole 9, inserting a probe of a soil moisture meter 7 into the top of the soil column 8, carrying out external shaping and fixing by using a permeable gauze 10, and filling the inside by using loess 11 to finish the installation of the soil moisture meter;
step 402, positioning a soil moisture meter and backfilling a buried hole: lowering a soil moisture meter to a preset position from bottom to top in a drilling hole by using a lifting rope 12, backfilling soil taken out of the original drilling hole 9 at the periphery side of a soil sample installed on the soil moisture meter and in a range of 20 cm-30 cm from top to bottom, tamping the lifting rope on a lifting ring 14 of a rammer 13, lowering a soil moisture meter 7 after tamping to the position of the next detection point, and sequentially completing the installation of the soil moisture meter;
step five, installing a water injection hole device: the process is as follows:
step 501, water level pipe is lowered: a water level pipe 15 is arranged in the water injection hole, wherein a water permeable opening is formed in the pipe wall of the water level pipe 15 below the ground and is wrapped by a gauze, the bottom of the water level pipe is flush with the bottom of the water injection hole 2, and the pipe orifice at the upper part is higher than the bottom surface h of the water injection pit 1 2 ；
Step 502, a pressure type water level gauge is put down: a pressure type water level gauge 16 is lowered in the water level pipe to a position 20 cm-30 cm away from the pipe bottom, and a cable fixing clamp 18 is used for fixing a cable line of the water level gauge and a cable line 17 of the soil moisture gauge on a top cap 19 of the pipe orifice;
step 503, backfilling the water injection hole: the particle diameter d of the filling of the periphery of the water level pipe in the water injection hole 3 Is a soybean cake 20 of (d) 3 The grain diameter range of the catalyst is 0.5 mm-30.0 mm;
step 504, water supply pipe connection: the water supply pipe 21 is connected with the water injection pit, and a water meter 22 is arranged for measuring the water injection quantity;
step six, acquiring detection data in the water injection humidifying process: the detection data comprises detection data before humidification, detection data during humidification and detection data after humidification, wherein the detection data before humidification comprises a mass moisture content actual measurement value measured by an indoor test and a volume moisture content detection value measured by a soil moisture meter, the detection data after humidification means that water injection is completed, and after water in a water injection hole is dissipated for a certain time, the volume moisture content is measured by the soil moisture meter, and the process is as follows:
step 601, obtaining an actual measurement value of mass water content before humidification: in the drilling process of the drilling hole 9, when the drilling hole is drilled to a position 10 cm-20 cm above each detection point, the sampler fetches soil samples to the designated position and completes an indoor geotechnical test, and the mass water content w before humidification is measured 1 Dry density of soil sampleOptimal water content w of soil sample opt Measuring physical and mechanical property index actual measurement values before all detection point soil samples are humidified;
step 602, acquiring a volume water content detection value before humidification: after the completion of the burying of the soil moisture meter 7, a detection value of the volume moisture content before humidification is obtained by the soil moisture meter at each detection pointThe data is sent to the data collection box 23 to complete the storage, so far the acquisition of the detection data before water injection and humidification is completed, and the detection data is marked as [ w ] 1 ，/>]；
Step 603, acquiring a monitoring value of the volume water content in the humidification process: after the fourth step and the fifth step are completed, injecting the design water quantity into the water injection pit 1 in batches until the monitoring data of the soil moisture meters at the plurality of detection points tend to be stable, and each soil moisture meter monitors the volume moisture rate of the positions of the respective detection points in real time to obtain a volume moisture rate detection value(wherein i is the detection point number), the volume moisture content detection value +.>The measured value of the soil moisture meter is calculated by adopting a calibration formula (1), the detection data is sent to a data acquisition box 23 to finish the storage, the sampling time and the volume moisture content monitoring value are recorded as [ t ],]；
step 604, obtaining an actual measurement value of the mass water content after humidification: drilling from top to bottom at a horizontal distance of 0.5 m-1.0 m from the position of the hole periphery detection point 4 by adopting drilling equipment until the position of 10 cm-20 cm above each detection point, taking a soil sample to a designated position by using a sampler, completing an indoor geotechnical test, and measuring the mass water content w of the soil sample 2 Measuring the measured value of the mass water content after humidification until all detection points are finished;
step 605, obtaining a detection value of the volume water content after humidification: after the water injection humidification is completed, a detection value of the volume moisture content after humidification is obtained by a soil moisture meter 7 at each detection pointThe detection value of the volume water content after humidificationThe measured value of the soil moisture meter is calculated by adopting a calibration formula (1), the data is sent to a data acquisition box 23 to finish the storage, and the data is detected after the water injection and humidification are finishedAcquisition, denoted as [ w ] 2 ，/>]；
Step seven, converting the monitoring value of the soil moisture meter: according to the detection data before humidification and the detection data after humidification in the step six, a conversion formula of mass moisture content and volume moisture content is established, the volume moisture content monitored in real time by the soil moisture meter in the step 603 is converted and corrected, the establishment method of each soil moisture meter conversion formula is the same, and the establishment method of the conversion formula of any soil moisture meter is as follows:
step 701, establishing a soil moisture meter monitoring value conversion formula: the pre-humidification detection data [ w ] in step 602 is processed 1 ，]And the soil layer immersed detection data [ w ] in step 605 2 ,/>]Performing linear regression to obtain the mass water content w i And volume water content monitoring value->The line conversion formula between the two is as follows:
（2）；
step 702, conversion of monitoring values of the soil moisture meter: according to formula (2), converting the volume water content monitored by the soil moisture meter in step 603 to obtain a soil sample volume water content monitoring value when the sampling time t is obtainedCorresponding mass water content w i ；
Step 703, repeating the steps 701 and 702 to complete the conversion of the volume water content and the mass water content monitored by the soil moisture meter in step 603, thereby obtaining the soil moisture meter monitored by each detection pointThe mass water content and the sampling time are recorded as [ t, w ] i ]；
Step eight, analyzing and processing monitoring data of the water injection humidifying process: image drawing is carried out on the collection of the plurality of sampling times and the mass water content in the step 703, so as to obtain a mass water content curve graph of the soil mass water content changing along with time in the water injection humidifying process, and the mass water content curve graph and the mass water content w of the soil sample before humidifying are obtained 1 Optimal water content w opt Performing comparative analysis to obtain a water injection humidifying process and a soil humidifying range of the soil, wherein the analyzing process is as follows:
step 801, acquiring a water injection humidifying process: increasing the mass water content w before humidification in the mass water content graph 1 In [0,w ] 1 ]Drawing a horizontal straight line for the datum point, wherein the vertical distance between the straight line and the curve is delta w, the delta w represents the humidification variation of the soil layer at a detection point at a certain moment, and when the delta w gradually tends to 0 along with the increase of the sampling time, the water injection and humidification of the soil layer are completed under the current water injection quantity;
step 802, repeating the step 801 for a plurality of times to obtain humidification variation amounts of a plurality of soil moisture meter detection point positions, and obtaining a soil layer humidification process;
step 803, acquiring a water injection humidifying effective influence range: arranging a plurality of Deltaw tending to 0 time obtained in step 802 from large to small, and determining soil layer water injection humidifying completion time t max The completion time t of water injection and humidification of the soil layer max The horizontal distance between the monitoring data of the soil moisture meter reaching the optimal content at the same depth detection point position is the effective influence radius of water injection humidification;
804, repeating 803 for a plurality of times to obtain water injection humidifying influence radiuses of the detection points with a plurality of depths, and determining a water injection humidifying effective influence range;
in this example, in the first step, the depth of the water injection pit 1 is in a value range of 0.3 m-0.5 m, and the diameter d of the water injection pit 1 is in a value range corresponding to the single-hole treatment area; diameter d of the water injection hole 2 in the first step 1 The range of the value of the product is 120 mm-160 mm.
In this example, the number of the cells,vertical distance h of detection points described in step 201, step 202 1 The range of the value of (2) is 1.0 m-1.5 m.
In this example, the moisture content and dry density of the soil sample mounted on the soil moisture meter column 8 described in step 401 are consistent with those of the soil sample around the detection point;
in this example, the pipe orifice of the water level pipe 15 in step 501 is higher than the ground to facilitate later observation, and the height above the ground is h 2 And the height h above the ground 2 The range of the value of (2) is 0.4 m-0.6 m;
in the example, the soil sample sampled by the drilling is undisturbed soil; in the step 601, the number of samples is two, one is used for geotechnical test and calibration, and the other is used for manufacturing and installing soil samples.
The method has the advantages of simple operation steps, easy realization of the design method, good use effect, wide application prospect and realization of automatic monitoring of the whole water injection and humidification process while ensuring the monitoring precision of the soil moisture meter.
Comparing the monitoring result with the verification case:
in order to explore the accuracy of the automatic test of the soil moisture meter in the foundation water injection humidifying process, the automatic test of the soil moisture meter and the manual sampling test are compared and verified. After water injection is completed for 96 hours, a Luoyang shovel is used outside the water injection pit for manual sampling test, the manual sampling test is divided into two stages of sampling and indoor drying test, the number of samples corresponds to the number of monitoring points of the soil moisture meter one by one, the samples are sampled according to the principle that a disturbance soil sample is taken every 0.5m, the sampling time is about 4 hours, the water content of the soil sample is measured by an oven in the indoor test, the drying time is about 8 hours, and the manual sampling test time is about 12 hours.
The manual Luoyang shovel is required to be used for sampling in a certain period of time, and the indoor drying method is required to be used for measuring the water content, so that a great amount of time is required for measuring the water content by manual sampling, and the automatic test of the soil moisture meter can be used for realizing the whole process monitoring and displaying the water content of soil samples at different time nodes. From the graph, the water content migration state of the soil body is divided into two stages within 96 hours of automatic water content test, and the water content increase speed of the upper soil body and the lower soil body is smaller than that of the middle soil body within 24 hours and belongs to the first stage; and the soil after 24 hours belongs to the second stage, the water content of the soil at the lower part increases and the water content difference value of different time periods increases.
The comparison analysis result of the automatic test result of the soil moisture meter after 96 hours of water injection and the manual sampling test result after 96 hours of water injection is shown in fig. 7, the difference between the automatic test result after 96 hours and the manual sampling test result is not large in the monitoring depth range, the water content difference value of the measuring point S7 ranges from-0.76 m to 0.80, the water content difference value of the measuring point F13 ranges from-0.89 to 0.73, the absolute value of the water content difference value of the two measuring points is smaller than 1, wherein the water content measured value of the measuring point S7 is consistent with the monitoring value at the positions of the depths of 5m and 8.5m, the water content measured value of the measuring point F13 is consistent with the monitoring value at the positions of the depths of 1.5m, 5.5m and 14.5 m.
In summary, the method for automatically testing the water content by adopting the soil moisture meter in the dynamic compaction treatment foundation water injection humidifying process has the advantages of simple monitoring process, continuous monitoring, no need of consuming a large amount of manpower and the like compared with the method for manually sampling and testing the water content, and the automatic test result is not much different from the manual sampling test result. By continuously monitoring the moisture content of the soil body, the soil body moisture migration state in different time periods can be presented, and a certain reference basis is provided for understanding and evaluating the water injection humidifying effect.
Although embodiments of the present invention have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the invention would be readily apparent to those skilled in the art, and accordingly, the invention is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.
Claims (10)
1. The method for testing the water content of the dynamic compaction treatment foundation in the water injection and humidification process is characterized by comprising the following steps of:
pre-excavating a water injection pit in a site to be humidified, and drilling a water injection hole in the center of the water injection pit;
respectively arranging detection points at the bottom of the water injection hole and the water injection Kong Kongzhou, and acquiring a detection value of the mass water content before humidification and the optimal mass water content of the soil sample at the positions of the detection points;
sampling at a detection point, preparing a remolded soil sample, comparing the water content of the remolded soil sample measured by a soil moisture meter with the water content of the remolded soil sample measured by an indoor drying method, calibrating and determining a calibration formula of the remolded soil sample;
burying a soil moisture meter at the detection point, detecting and calculating to obtain a volume moisture content detection value before humidification;
installing a water injection device in the water injection hole, injecting design water into the water injection pit in batches until monitoring data of the soil moisture meter of a plurality of detection points tend to be stable, detecting in real time, and calculating to obtain a detection value of the volume moisture content in the humidifying process;
obtaining a mass moisture content detection value after humidification and a volume moisture content detection value after humidification of each detection point, carrying out linear regression on the mass moisture content detection value and the volume moisture content detection value before humidification, obtaining a conversion relation between the mass moisture content detection value and the volume moisture content detection value, further converting the volume moisture content detection value in the humidification process into the mass moisture content detection value in the humidification process one by one, drawing a mass moisture content graph in the humidification process, and obtaining a water injection humidification effective influence range through comparison analysis on the mass moisture content detection value before humidification and the optimal mass moisture content of a soil sample.
2. The method for testing the water content in the water injection and humidification process of the dynamic compaction treatment foundation according to claim 1, wherein the diameter of the water injection pit is d, and the diameter of the water injection hole is d 1 The difference value between the quasi-humidification depth H and the water injection hole depth H is delta H, and the value range of the delta H is 2-4 m.
3. The method for testing the water content of the dynamic compaction treatment foundation water injection humidifying process according to claim 2, wherein the water injection hole bottom detection point and the water injection Kong Kongzhou detection point are arranged as follows:
the detection point arrangement at the bottom of the water injection hole: after the water injection hole is formed, drilling is carried out at the bottom, a plurality of detection points are arranged, and the distance between the detection point of the soil moisture meter at the uppermost part of the water injection hole and the bottom of the water injection hole is h 1 The vertical distance between each detection point is h 1 ；
Detection point arrangement of water injection Kong Kongzhou: 3-6 annular measuring lines are arranged around the water injection hole, the distance between the measuring lines is L, and the value range of the distance between the measuring lines is 0.5 m-1.0 m; 3 rays are led out from the center of the water injection pit, the included angle of the rays is 120 degrees, the intersection point of each annular measuring line and the rays is a vertical detecting point, a plurality of vertical detecting points are arranged from top to bottom, after the third annular measuring line, the uppermost part of each measuring line is reduced by one hole circumference detecting point, the uppermost detecting point forms an included angle of 45 degrees, and the vertical distance of each detecting point is h 1 。
4. The method for testing the water content in the dynamic compaction treatment foundation water injection humidifying process according to claim 3, wherein in the process of forming holes by water injection holes, sampling is carried out at the corresponding space position of each detection point, the soil sample is pressed into a sample preparation cylinder after being treated to prepare a remolded soil sample, and the soil moisture meter calibration is carried out and a calibration formula is determined, and the specific process is as follows:
preparing a calibrated soil sample: before sample preparation, air-drying and breaking the soil sample taken at the space position corresponding to the detection point in the pore forming process of the water injection hole in a natural state, measuring the water content of the soil material, and preparing the soil material with different water contents, wherein the water content range of the soil material is as follows: moisture content w at soil moisture measurement point nat Optimal water content w opt Saturated water content w sat ，w nat And w is equal to opt Between, w opt And w is equal to sat Respectively inserting at least 3 water content calibration points, mixing, stuffying and weighing the soil, controlling the dry density of the calibration soil sample according to the same dry density of the soil sample taken at the soil moisture measurement point, pressing the soil material into a sample preparation cylinder through a sample preparation device to prepare the calibration soil sample, wherein the diameter of the calibration soil sample is not less than 3 times that of a soil moisture meter probeDiameter, height not less than 2 times of the height of the probe of the soil moisture meter; preparing a saturated calibration soil sample under the optimal water content, soaking the saturated calibration soil sample together with a sample preparation cylinder for saturation, preparing a sample by adopting a sample pressing method when the water content is lower than the optimal water content, and performing a layering tamping method to perform wool hanging treatment between layers;
calibrating: during testing, a probe of a soil moisture meter is inserted into a calibrated soil sample along the top surface of the soil column, after the testing is finished, the probe is pulled out, soil is taken out in the measuring range of the probe, and the mass moisture content is measured by adopting a drying method; preparing a soil sample by adopting a soil material with optimal water content, inserting a probe of a soil moisture meter into the soil sample, airing the soil sample in a natural state, controlling the water content by the length of the airing time, sealing and preserving for 1 week together with a probe of the soil moisture meter, and finally measuring the volume water content of the sample by adopting the soil moisture meter and a drying method respectively;
calibration curve determination: the volume water content of the same calibrated soil sample adopts a soil moisture meter test value theta v And a test value theta by a drying method w Data are fitted by adopting unitary cubic curve, and a fitting formula is as follows
（1）;
Wherein,a，b，c，dare fitting coefficients.
5. The method for testing the water content of the dynamic compaction treatment foundation water injection humidifying process according to claim 4, wherein the soil moisture meter burying process is as follows:
soil moisture meters are mounted to the earth column: taking soil samples near each detection point position and preparing a soil column, wherein the diameter of the soil column is smaller than that of a drilled hole, inserting a probe of a soil moisture meter into the top of the soil column, carrying out external shaping and fixing by using a permeable gauze, and filling the inside with loess to finish the installation of the soil moisture meter;
and (3) positioning a soil moisture meter and backfilling the embedded holes: the soil moisture meter is lowered to a preset position by using a lifting rope from bottom to top in the drilling hole, soil backfilling is carried out on the soil body taken out in the original drilling hole in the range of 20 cm-30 cm above and below the soil moisture meter mounting soil sample, the lifting rope is sleeved on a lifting ring of the rammer for tamping, the soil moisture meter is lowered after the soil moisture meter is tamped to the position of the next detection point, and the soil moisture meter mounting is completed sequentially.
6. The method for testing the water content in the dynamic compaction treatment foundation water injection humidifying process according to claim 5, wherein the water injection device structure comprises: the installation process of the water injection device comprises the following steps of:
the water level pipe is lowered: a water level pipe is placed in the water injection hole, wherein the pipe wall of the water level pipe below the ground is provided with a water permeable port and is wrapped by a gauze, the bottom of the water level pipe is flush with the bottom of the water injection hole, and the pipe orifice at the upper part is higher than the bottom h of the water injection pit 2 ；
And (3) lowering a pressure type water level gauge: a pressure type water level gauge is put down in a water level pipe to a position 20 cm-30 cm away from the bottom of the water level pipe, and a cable fixing clamp for fixing a cable of the water level gauge and a cable of a soil moisture gauge is used for fixing a top cap of a pipe orifice;
backfilling the water injection hole: the particle diameter d of the filling of the periphery of the water level pipe in the water injection hole 3 And d is as follows 3 The grain diameter range of the catalyst is 0.5 mm-30.0 mm;
and (3) connecting a water supply pipe: the water filling pit is connected with a water supply pipe and is provided with a water meter for measuring the water injection quantity.
7. The method for testing the water content in the dynamic compaction treatment foundation water injection humidifying process according to claim 6, wherein the method is characterized in that,
obtaining an actual measurement value of the mass water content after humidification: drilling from top to bottom at the position which is on the same circular arc as the detection point around the hole and has the horizontal distance of 0.5 m-1.0 m by adopting drilling equipment until the position above each detection point is 10 cm-20 cm, taking a soil sample to a designated position by using a sampler, completing an indoor geotechnical test, and measuring the mass water content w of the soil sample 2 Measuring the measured value of the mass water content after humidification until all detection points are finished;
acquisition of volume water content detection value after humidification: after the water injection humidification is completed, the water is passed through each inspectionThe soil moisture meter at the measuring point obtains the detection value of the volume moisture content after humidificationThe detection value is calculated by adopting a soil moisture meter measurement value and adopting a calibration formula (1), the data is sent to a data acquisition box to finish storage, and the detection data is acquired after water injection and humidification are finished, and is marked as [ w ] 2 ，/>]。
8. The method for testing the water content in the dynamic compaction treatment foundation water injection humidifying process according to claim 7, wherein the conversion relation between the mass water content detection value and the volume water content detection value is as follows:
（2）；
wherein,detection value of volume water content before humidification, +.>For the detection value of the volume water content of the humidification process, w 1 The water content of the product is the mass water content before humidification.
9. The method for testing the water content in the water injection humidifying process of the dynamic compaction treatment foundation according to claim 8, wherein the water injection humidifying effective influence range is obtained by comparing and analyzing the water content detection value of the mass before humidifying and the water content of the optimal mass of the soil sample, and the method comprises the following steps:
acquiring a water injection humidifying process: increasing the mass water content w before humidification in the mass water content graph 1 In [0,w ] 1 ]Drawing a horizontal straight line for the datum point, wherein the vertical distance between the straight line and the curve is Deltaw, and Deltaw represents a certain momentDetecting the humidification variation of the soil layer, and when the delta w gradually tends to 0 along with the increase of the sampling time, indicating that the water injection humidification of the soil layer is finished under the current water injection quantity;
repeating the steps for multiple times to obtain humidification variation of the positions of the detection points of the soil moisture meter, and obtaining a soil layer humidification process;
acquiring a water injection humidifying effective influence range: arranging a plurality of delta w tending to 0 time obtained in the last step from large to small, and determining the completion time t of soil layer water injection humidification max The completion time t of water injection and humidification of the soil layer max The horizontal distance between the monitoring data of the soil moisture meter reaching the optimal content at the same depth detection point position is the effective influence radius of water injection humidification;
repeating the steps for multiple times to obtain water injection humidifying influence radiuses of the detection points at multiple depths, and determining the effective influence range of water injection humidifying.
10. The method for testing the water content in the dynamic compaction treatment foundation water injection humidifying process according to claim 9, wherein the method is characterized in that,
the value range of the depth of the water injection pit is 0.3-0.5 m, and the value range of the diameter d of the water injection pit is the diameter corresponding to the single-hole treatment area; the diameter d of the water injection hole 1 The value range of (2) is 120 mm-160 mm;
vertical distance h of detection points 1 The range of the value of (2) is 1.0 m-1.5 m;
the water content and the dry density of the soil sample of the soil moisture meter column are consistent with those of the soil sample around the detection point;
the pipe orifice of the water level pipe is higher than the ground so as to facilitate later observation, and the height higher than the ground is h 2 And is higher than the ground by the height h 2 The range of the value of (2) is 0.4 m-0.6 m;
the soil sample sampled by drilling is undisturbed soil; the sampling number is two, and one is used for geotechnical test and calibration, and the other is used for manufacturing and installing soil samples.
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103410136A (en) * | 2013-08-29 | 2013-11-27 | 机械工业勘察设计研究院 | Drilling burying method of soil moisture meter |
| CN106769762A (en) * | 2016-12-15 | 2017-05-31 | 机械工业勘察设计研究院有限公司 | A kind of method of testing of settlement by soaking soil layer wetting process |
| CN208283148U (en) * | 2018-06-26 | 2018-12-25 | 机械工业勘察设计研究院有限公司 | A kind of sample preparation device for soil moisture meter calibration |
| CN109142647A (en) * | 2018-10-25 | 2019-01-04 | 农业部规划设计研究院 | A kind of scaling method of compost moisture content online monitoring instruments |
| CN109183777A (en) * | 2018-10-24 | 2019-01-11 | 中国水利水电第四工程局有限公司 | A kind of quincunx construction method for laying water injection hole of pond dam foundation water filling of regulating and storing |
| CN115677279A (en) * | 2022-11-10 | 2023-02-03 | 四川省紫坪铺开发有限责任公司 | Cementing development and preparation method of ultrafine granular sludge in reservoir area |
| CN116201101A (en) * | 2023-02-28 | 2023-06-02 | 中国十七冶集团有限公司 | Construction method of ultra-long plain soil compaction pile in collapsible loess area with low water content |
| CN117051809A (en) * | 2023-07-12 | 2023-11-14 | 中国电建集团西北勘测设计研究院有限公司 | Combined construction method for pre-ramming and humidifying dynamic compaction of unordered high-fill site |
| CN117188425A (en) * | 2023-07-28 | 2023-12-08 | 中交第四航务工程局有限公司 | Method for determining effective reinforcement depth and range of dynamic compaction |
| CN117552483A (en) * | 2024-01-10 | 2024-02-13 | 山西金宝岛基础工程有限公司 | Test method for foundation reinforcement influence range of dynamic compaction treatment |
-
2024
- 2024-01-18 CN CN202410074194.3A patent/CN117589632A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103410136A (en) * | 2013-08-29 | 2013-11-27 | 机械工业勘察设计研究院 | Drilling burying method of soil moisture meter |
| CN106769762A (en) * | 2016-12-15 | 2017-05-31 | 机械工业勘察设计研究院有限公司 | A kind of method of testing of settlement by soaking soil layer wetting process |
| CN208283148U (en) * | 2018-06-26 | 2018-12-25 | 机械工业勘察设计研究院有限公司 | A kind of sample preparation device for soil moisture meter calibration |
| CN109183777A (en) * | 2018-10-24 | 2019-01-11 | 中国水利水电第四工程局有限公司 | A kind of quincunx construction method for laying water injection hole of pond dam foundation water filling of regulating and storing |
| CN109142647A (en) * | 2018-10-25 | 2019-01-04 | 农业部规划设计研究院 | A kind of scaling method of compost moisture content online monitoring instruments |
| CN115677279A (en) * | 2022-11-10 | 2023-02-03 | 四川省紫坪铺开发有限责任公司 | Cementing development and preparation method of ultrafine granular sludge in reservoir area |
| CN116201101A (en) * | 2023-02-28 | 2023-06-02 | 中国十七冶集团有限公司 | Construction method of ultra-long plain soil compaction pile in collapsible loess area with low water content |
| CN117051809A (en) * | 2023-07-12 | 2023-11-14 | 中国电建集团西北勘测设计研究院有限公司 | Combined construction method for pre-ramming and humidifying dynamic compaction of unordered high-fill site |
| CN117188425A (en) * | 2023-07-28 | 2023-12-08 | 中交第四航务工程局有限公司 | Method for determining effective reinforcement depth and range of dynamic compaction |
| CN117552483A (en) * | 2024-01-10 | 2024-02-13 | 山西金宝岛基础工程有限公司 | Test method for foundation reinforcement influence range of dynamic compaction treatment |
Non-Patent Citations (4)
| Title |
|---|
| 王美艳;史学正;于东升;徐胜祥;檀满枝;赵永存;: "黄淮海农业区旱地土壤有机碳变异性的空间尺度效应", 土壤, no. 04, 15 August 2013 (2013-08-15) * |
| 董翰川;庞丽丽;史云;: "频域反射分析法测定土壤含水率标定试验研究", 水文地质工程地质, no. 03, 15 May 2019 (2019-05-15) * |
| 钱尼贵;王端宜;孙晓立;石立万;: "广东高速公路路基内部含水率现场监测与分析", 长安大学学报(自然科学版), no. 02, 15 March 2015 (2015-03-15) * |
| 黄飞龙;何艳丽;陈武框;: "FDR土壤水分自动站三级标定的方法", 广东气象, 31 December 2011 (2011-12-31) * |
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