CN116289435B - Roadbed construction method and system by utilizing gangue mixing - Google Patents
Roadbed construction method and system by utilizing gangue mixing Download PDFInfo
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- CN116289435B CN116289435B CN202310202213.1A CN202310202213A CN116289435B CN 116289435 B CN116289435 B CN 116289435B CN 202310202213 A CN202310202213 A CN 202310202213A CN 116289435 B CN116289435 B CN 116289435B
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- 238000010276 construction Methods 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 claims abstract description 90
- 230000008569 process Effects 0.000 claims abstract description 53
- 239000003245 coal Substances 0.000 claims abstract 2
- 238000005056 compaction Methods 0.000 claims description 35
- 238000005259 measurement Methods 0.000 claims description 19
- 239000000203 mixture Substances 0.000 claims description 17
- 238000001514 detection method Methods 0.000 claims description 14
- 230000007547 defect Effects 0.000 claims description 7
- 230000001133 acceleration Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 239000002689 soil Substances 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 3
- 230000002950 deficient Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C21/00—Apparatus or processes for surface soil stabilisation for road building or like purposes, e.g. mixing local aggregate with binder
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
- E01C3/04—Foundations produced by soil stabilisation
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/14—Force analysis or force optimisation, e.g. static or dynamic forces
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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Abstract
The invention relates to the field of roadbed construction, in particular to a roadbed construction method and system by utilizing coal gangue mixing, wherein the method comprises the following step of adjusting the next ramming energy in the process of ramming to be executed according to the relation between each actual ramming stroke and standard ramming stroke of a point to be rammed in the process of ramming; counting the number of times of tamping the roadbed to be tamped, and detecting the flatness of the roadbed to be tamped after the target number of times of tamping when the number of times of tamping actually executed reaches the target number of times, so as to obtain the actual flatness; classifying by the absolute difference value of the actual flatness and the standard flatness to obtain a classification result; and adjusting the target times in the next period according to the classification result. According to the invention, the impact energy in the impact process of the point to be impact is dynamically adjusted to enable the impact point to reach the preset flatness, and the target number of the next impact period in the impact process is adjusted by detecting the flatness of the impact plane when the target number of the impact period is currently reached, so that the final construction flatness is ensured.
Description
Technical Field
The invention relates to the field of roadbed construction, in particular to a roadbed construction method and system by utilizing gangue mixing.
Background
In the field of road subgrade construction, there are two basic forms according to the different terrain conditions in which the road subgrade is located: embankment and cutting, both of which usually use earth as the main body.
Patent publication No. CN115058931A discloses a soil subgrade filling construction method, which is applicable to strong weathering tuff and at least comprises the following steps: taking lump strong wind tuff; after being paved to the first thickness, the first rolling is carried out; after the pavement cold recycling machine is used for carrying out first mixing and crushing, standing the soil body to volatilize water in the rock fragments; spreading the low-water-content sandy soil to a second thickness, and then carrying out secondary mixing and crushing by using a pavement cold recycling machine; the subgrade is formed after compaction.
However, the strong weathering tuff adopted in the roadbed construction method in the prior art is low in natural level by using a method of rolling, mixing and crushing for many times, and the obtained natural level is composed of particles with various particle sizes, and the quantity of the particles occupied by the particle sizes is not in fixed proportion, so that the flatness of the roadbed surface after roadbed construction is low.
Disclosure of Invention
Therefore, the invention provides a roadbed construction method and system by utilizing gangue mixing, which can solve the problem of low surface flatness of the roadbed after the conventional soil roadbed filling construction.
In order to achieve the above object, according to one aspect of the present invention, there is provided a method for constructing a roadbed using a gangue mixture, the method comprising:
Determining the number of times of compaction to be performed on any point to be compacted in the roadbed to be compacted under the condition of the actual thickness of the roadbed to be compacted according to the compaction energy-number of times curve, wherein a plurality of points to be compacted are arranged in the roadbed to be compacted;
determining an ith actual ramming course of a roadbed to be rammed after finishing the ith ramming in the times of the to-be-performed ramming of a point to be rammed;
Presetting an ith standard tamping procedure D and a standard flatness W corresponding to the ith tamping;
Determining whether to adjust the ramming energy Ei+1 in the process of the number of times of ramming to be executed according to the relation between the ith actual ramming process and the ith standard ramming process in the ramming process of the point to be rammed;
counting the actual execution ramming times of the roadbed to be rammed, and detecting the flatness of the roadbed to be rammed after the actual ramming of the target times when the actual execution ramming times reach the target times corresponding to the current ramming period, so as to obtain the actual flatness;
classifying by the absolute difference value of the actual flatness and the standard flatness to obtain a classification result;
and adjusting the target times in the next ramming period according to the classification result.
Further, the determining the number of times of the compaction to be performed for any point to be compacted in the roadbed to be compacted under the condition of determining the actual thickness of the roadbed to be compacted according to the compaction energy-compaction number curve comprises:
Selecting a first roadbed to be tested, which is the same as the actual thickness of the roadbed to be tamped;
The method comprises the steps of performing tamping on any tamping point in a first roadbed to be tested according to standard tamping energy until the actual thickness of the first roadbed to be tested reaches a target thickness, and counting the tamping times performed until the target thickness is reached by the standard tamping energy;
and taking the ramming times as the ramming times to be executed for the roadbed to be rammed.
Further, determining an ith actual ramming course of the roadbed to be rammed after finishing an ith ramming in the number of times of the ramming to be performed of the point to be rammed comprises;
Selecting any direction at the center point of a region to be tamped before the i-th tamping, burying a plurality of first observation marks at intervals with any length on the premise of ensuring that the first observation marks are positioned in the region to be tamped, burying a plurality of second observation marks at intervals with any length on the premise of ensuring that the second observation marks are positioned in the region to be tamped in the vertical direction of the selected direction, measuring the vertical heights of the first observation marks and the second observation marks through a level meter, and taking the average value of the height of the first observation marks and the height of the second observation marks as L0;
After the ith ramming, observing the vertical heights of the embedded first observation mark and the embedded second observation mark through a level meter, taking an average value of the vertical heights of the first observation mark and the second observation mark, and marking the average value as L, wherein the difference value between the L and the LO is the ith actual ramming process.
Further, the determining whether to adjust the compaction energy ei+1 in the process of the number of times of compaction to be performed according to the relation between the ith actual compaction process and the ith standard compaction process in the process of compacting the point to be compacted includes:
The allowable tamper error D0 is preset;
setting Deltad= |D-Dn|, dn is the ith actual tamping course, and D is the ith standard tamping course;
If delta D is more than or equal to D0, judging that the tamping stroke error of the tamping is overlarge, and adjusting the tamping energy in the process of the times of the tamping to be executed;
If Deltad is less than D0, the compaction is judged to be qualified, and the adjustment of the compaction energy in the process of the times of compaction to be executed is not needed.
Further, when it is desired to adjust the impact energy in the process of the number of times of impact to be performed;
Selecting a second roadbed to be tested, which is the same as the actual thickness of the roadbed to be tamped;
Respectively tamping different tamping points of the second roadbed to be tested under different tamping energies, recording the tamping ranges of the tamping points to be tested corresponding to the tamping energies, and drawing the tamping energies and the tamping ranges curves;
taking the slope of the tamping energy and the tamping curve as a tamping energy adjustment coefficient sigma of the number of times of tamping to be executed;
Determining air resistance according to the falling height of the rammer and the contact area of the rammer and the roadbed to be rammed in the ith ramming process;
Calculating the actual absolute difference value of the ith actual ramming program and the ith standard ramming program;
calculating ramming energy according to formula (1) based on the actual absolute difference, the adjustment factor and the air resistance;
Ei+1＝Ei×△d×σ+Ek (1)，
wherein, deltad= |D-Dn|, F＝(1/2)×C×ρ×S×V,/> G=9.8 m/S, c=0.7, ρ=1.293 g/l, wherein E i is the ramming energy of the ith ramming, ek is the energy consumed by discharging air when the ramming hammer falls, F is the air resistance of the ramming hammer at the point h from the roadbed to be rammed, C is the air resistance coefficient, ρ is the air density, S is the contact area of the ramming hammer and the roadbed to be rammed, and g is the gravitational acceleration.
Further, detecting the flatness of the roadbed to be tamped after the actual tamping for the target times, and obtaining the actual flatness Wn includes:
In the ramming plane, half of the shortest side length of the plane is taken as radius R, any point of the circle in the ramming plane can be ensured to be complete as a circle center, m points are selected on the side length of the circle, the height difference between each point and the circle center is measured and recorded as Ym, and the average height difference is Wn＝R-Ya/R。
Further, the classifying according to the absolute difference between the actual flatness and the standard flatness includes:
calculating an absolute difference DeltaW= |W-Wn| between the actual flatness and the standard flatness;
if delta W is less than or equal to 0.05, judging that the flatness of the roadbed to be tamped is qualified;
If the delta W is less than or equal to 0.05 and less than or equal to 0.1, judging that the flatness of the roadbed to be tamped has defects;
And if delta W is more than 0.1, judging that the flatness of the roadbed to be tamped is unqualified.
Further, adjusting the target number of times during a next ram cycle based on the classification result includes;
When the flatness of the roadbed to be tamped is qualified, the target times of the next tamping period are not adjusted;
When judging that the flatness of the roadbed to be tamped has defects, adjusting the target frequency of the next tamping period to be 1/2 of the target frequency corresponding to the previous tamping period;
When the flatness of the roadbed to be tamped is judged to be unqualified, the target frequency of the next tamping period is adjusted to be 1, and the actual flatness after being tamped is secondarily judged according to the adjusted target frequency in the next tamping period.
Further, the performing secondary judgment on the actual flatness after being tamped according to the adjusted target times in the next tamping period includes:
Setting the maximum continuous measurement threshold value to be five times;
and stopping tamping when the number of continuous measurement reaches a set maximum continuous measurement threshold value, and judging that the rammer for ramming the roadbed to be rammed needs to be replaced.
The invention also provides a roadbed construction system using the gangue mixture, which is applied to the roadbed construction method using the gangue mixture and comprises the following steps:
the first determining module is used for determining the number of times of compaction to be performed on any point to be compacted in the roadbed to be compacted under the condition of the actual thickness of the roadbed to be compacted according to the compaction energy-compaction number curve, and a plurality of points to be compacted are arranged in the roadbed to be compacted;
The second determining module is used for determining an ith actual ramming course of the roadbed to be rammed after finishing the ith ramming in the times of the execution of the ramming of the point to be rammed;
The setting module is used for presetting an ith standard tamping procedure D and standard flatness corresponding to the ith tamping;
The third determining module is used for determining whether to adjust the ramming energy Ei+1 in the process of the ramming times to be executed according to the relation between the ith actual ramming process and the ith standard ramming process in the process of ramming the point to be rammed;
the detection module is used for counting the actual execution ramming times of the roadbed to be rammed, and detecting the flatness of the roadbed to be rammed after the actual ramming of the target times when the actual execution ramming times reach the target times corresponding to the current ramming period, so as to obtain the actual flatness;
the comparison module is used for determining a comparison result through the comparison of the actual flatness and the standard flatness;
and the adjusting module is used for adjusting the target times in the next tamping period according to the comparison result.
Compared with the prior art, the method has the advantages that the actual ramming process of the roadbed to be rammed is determined by determining the number of times of ramming to be executed of any point to be rammed under the actual thickness condition of the roadbed to be rammed, the actual ramming process of the detection rammed point is compared with the preset standard ramming process, the ramming energy of the next rammed point is adjusted according to the comparison result, the ramming plane flatness when the current number of times of ramming cycle reaches the target number of times is compared with the standard flatness, the target number of times of the next ramming cycle is adjusted according to the comparison result, the flatness of each rammed point is guaranteed, the roadbed flatness of final construction can be guaranteed, and convenience is provided for subsequent pavement construction.
And counting the number of times of tamping performed by the standard tamping energy until the target thickness is reached by the actual thickness of the first roadbed to be tested, taking the number of times of tamping as the number of times of tamping performed by the roadbed to be tamped, determining the number of times of tamping of a single tamping point, and effectively providing a standard for subsequent integral roadbed construction.
In particular, the vertical heights of all the observation marks in the front and rear directions of a single ramming are measured by using the level meter, the vertical heights of all the measurement marks before and after the ramming are averaged, and the absolute difference is obtained between the two averages, so that the measurement error and the environmental factor are furthest removed from the actual ramming process of the ramming, and the accuracy of the actual ramming process of the ramming is ensured.
In particular, the method and the device for single-point tamping have the advantages that the difference value of the single actual tamping procedure and the standard tamping procedure is calculated and compared with the allowable tamping procedure error, when the difference value of the single actual tamping procedure and the standard tamping procedure is larger than the allowable tamping procedure error, the condition that the tamping is unqualified at the time is judged, the tamping energy of the next tamping is adjusted, and when the difference value of the single actual tamping procedure and the standard tamping procedure is smaller than the allowable tamping procedure error, the tamping energy in the process of the times of the tamping to be executed is not needed to be adjusted, the tamping energy adjustment efficiency of the single-point tamping is improved, and therefore the time cost of integral construction is saved.
In particular, according to the invention, different to-be-tested ramming points are respectively rammed under different ramming energies of the roadbed to be tested, the ramming ranges of the to-be-tested ramming points corresponding to the ramming energies are recorded, the ramming energy and the ramming range curve are drawn, the adjustment coefficient sigma of the ramming energy is determined through the curve, and the energy consumed by discharging air when the ramming hammer falls is measured, so that the ramming energy of the next ramming is accurately adjusted, and the ramming effect of the next ramming is ensured.
In particular, the invention can ensure that a circle is completely in any point in the ramming plane as the circle center in the ramming plane after ramming, takes half of the shortest side length of the plane as the radius, selects and measures a plurality of points on the side length of the circle, measures the height difference between each point and the circle center, sums the height differences between all points and the circle center to obtain the average value, and divides the average value and the radius of the circle to obtain the actual flatness of the ramming plane after ramming, thereby optimizing the calculation method of the flatness and saving the time cost on the premise of ensuring the accuracy of the actual flatness.
In particular, the method and the device judge whether the flatness of the roadbed to be tamped is qualified or not by classifying the absolute difference value of the actual flatness and the standard flatness; whether the flatness of the roadbed to be tamped is defective or not; and judging whether the flatness of the roadbed to be tamped is unqualified or not, and taking a foundation for subsequent adjustment, thereby improving the overall adjustment efficiency.
In particular, when the flatness of the roadbed to be tamped is judged to be qualified, the target times of the next tamping period are not adjusted; when judging that the flatness of the roadbed to be tamped has defects, adjusting the target frequency of the next tamping period to be 1/2 of the target frequency corresponding to the previous tamping period; when the flatness of the roadbed to be tamped is judged to be unqualified, the target frequency of the next tamping period is adjusted to be 1, and the actual flatness after being tamped is secondarily judged in the next tamping period according to the adjusted target frequency, so that the adjustment mode of the target frequency of the tamping period is set, and the detection efficiency is improved and meanwhile, the detection efficiency is ensured.
In particular, the invention sets the maximum continuous measurement threshold for five times, stops the tamping when the number of continuous measurement reaches the set maximum continuous measurement threshold, needs to replace the tamping hammer, sets the continuous detection limit, protects the safety of the detection device, provides a solution to the problem after reaching the limit, and ensures the road surface flatness after the whole roadbed is tamped.
Drawings
FIG. 1 is a schematic flow chart of a roadbed construction method using gangue mixtures according to an embodiment of the present invention;
Fig. 2 is a block diagram of a roadbed construction system using gangue mixing according to an embodiment of the present invention.
Detailed Description
Referring to fig. 1, the roadbed construction method based on gangue mixing provided by the embodiment of the invention includes:
step S100: determining the number of times of compaction to be performed on any point to be compacted in the roadbed to be compacted under the condition of the actual thickness of the roadbed to be compacted according to the compaction energy-number of times curve, wherein a plurality of points to be compacted are arranged in the roadbed to be compacted;
step S200: determining an ith actual ramming course of a roadbed to be rammed after finishing the ith ramming in the times of the to-be-performed ramming of a point to be rammed;
Step S300: presetting an ith standard tamping procedure D and a standard flatness W corresponding to the ith tamping;
step S400: determining whether to adjust the ramming energy Ei+1 in the process of the number of times of ramming to be executed according to the relation between the ith actual ramming process and the ith standard ramming process in the ramming process of the point to be rammed;
Step S500: counting the actual execution ramming times of the roadbed to be rammed, and detecting the flatness of the roadbed to be rammed after the actual ramming of the target times when the actual execution ramming times reach the target times corresponding to the current ramming period, so as to obtain the actual flatness;
step S600: classifying by the absolute difference value of the actual flatness and the standard flatness to obtain a classification result;
Step S700: and adjusting the target times in the next ramming period according to the classification result.
Specifically, according to the method, whether the tamper Cheng Chazhi of the tamper is within the allowable tamper error range of engineering construction is judged through the absolute difference value of each actual tamper and standard tamper of a point to be tamped in the tamping process, if the allowable tamper error of the second tamper is 0.5m, the tamping energy of the next tamper is not adjusted when the absolute difference value of the second actual tamper and the standard tamper set for the second tamper is within 0.5m, if the absolute difference value is larger than 0.5m, the tamping energy of the next tamper is adjusted, the actual flatness of a roadbed to be tamped is classified through the absolute difference value of the actual flatness and the standard flatness when the actual number of times of the tamper reaches the target number of times, for example, the target number of times of an initial detection period is set to 1000 times, the flatness of the roadbed is detected when the initial detection period reaches 1000 times, whether the flatness of the roadbed is qualified or not is judged, whether the flatness of the roadbed is defective or not is set, the tamping hammer is unqualified or not is set, the actual flatness of the roadbed is set according to the classification result, the objective number of times is set in the next period is set, and the threshold is continuously replaced after the threshold is reached.
Specifically, the invention ensures the tamping thickness of a single tamping point by dynamically adjusting the next tamping energy in the tamping process to be executed, the tamping flatness reaches the expected value, the absolute difference value of the actual flatness and the standard flatness is classified by detecting the actual flatness of the roadbed to be tamped when the target times are detected, the target times in the next period are adjusted according to the classification result, the detection efficiency in construction is improved, the construction progress is accelerated, the flatness of the tamping road surface in the whole construction is ensured, the service life of the detection system is ensured by setting a continuous detection threshold value, the construction problem caused by the fact that the tamping hammer reaches the use times is eliminated by replacing the tamping hammer, and the final construction flatness is ensured.
Specifically, the first roadbed to be tested, which is the same as the actual thickness of the roadbed to be tamped, is selected, the tamping is performed according to standard tamping energy, after the tamping reaches the target thickness, the number of times of the tamping is counted, the number of times of the tamping is used as the number of times of the tamping to be performed of the roadbed to be tamped, for example, the construction requirement requires that the gangue roadbed 4m above the top of the roadbed is tamped 8-10m below the road surface, then the roadbed to be tested, which is the same as the actual construction condition, is selected, the tamping energy of 15000kN.m is used for tamping, and after 10 times, the number of times of the tamping to be performed of the roadbed reaches 8-10m below the road surface.
Specifically, the method and the device perform the tamping on the test roadbed through standard tamping energy, count the number of times of the tamping performed after the tamping reaches the target thickness, and take the number of times of the tamping as the number of times of the tamping to be performed on the roadbed to be tamped, so that the number of times of the single-point tamping is determined, a foundation is provided for subsequent construction, and the construction quality is ensured.
Specifically, two directions which are vertical to each other are selected at the center point of the area to be tamped before tamping, when all the observation marks are located in the area to be tamped, a plurality of observation marks are buried at any length as intervals, the vertical heights of all the observation marks before and after tamping are measured through a level meter, for example, the vertical heights of all the observation marks before the second tamping are respectively 0.2m, 0.1m, 0.03 and 0.12m, the average vertical height of all the observation marks before tamping is 0.13m, the average vertical height of all the observation marks after tamping is 1.3m, 1.6m, 1.7m, 1.9m and 1.8m, the average vertical height of all the observation marks after tamping is 1.66m, and the second actual tamping is 1.66m.
Specifically, the method ensures the accuracy of the obtained ith actual ramming process by taking the mean value of the vertical heights of the multiple observation marks in any direction and the observation marks before and after ramming, thereby ensuring the construction precision of construction.
Specifically, according to the invention, through specific construction acceptance requirements, an allowable tamper Cheng Chazhi is arranged, the i-th actual tamper and the i-th standard tamper are made into a difference value, if the absolute value of the difference value is within the allowable tamper Cheng Chazhi, the tamper is judged to be qualified, the tamper energy of the next tamper is not adjusted, if the absolute value of the difference value is greater than the allowable tamper Cheng Chazhi, the tamper energy of the next tamper is judged to be too large, for example, in the roadbed construction of K15+732-K16+269, the allowable tamper error of a tamper point is 0.2m, the second actual tamper of a tamper point is 2.3m, the second standard tamper is judged to be qualified, the tamper energy of the third tamper is not adjusted, the third tamper is continued to be 1.3m, and the third standard tamper is judged to be 2m, and the next tamper energy is judged to be large.
Specifically, whether the tamping energy of the next tamping needs to be adjusted or not is judged by judging whether the absolute values of the ith actual tamping stroke and the ith standard tamping Cheng Chazhi are in the acceptance standard of actual construction, and the method saves the adjustment time for adjusting the tamping point and ensures that the construction effect of the tamping point reaches the acceptance standard.
Specifically, different to-be-tested ramming points are rammed under different ramming energies of a roadbed to be tested, the ramming procedure of to-be-tested ramming corresponding to the ramming energies is recorded, a ramming energy and ramming curve is drawn, an adjustment coefficient of the ramming energy is obtained through the slope of the curve, and the ramming energy of next ramming is adjusted according to a formula Ei+1=Ei× [ delta ] d×sigma+Ek with the energy consumed by the air discharged by the falling of the rammer through the adjustment coefficient, wherein Ei is the ramming energy of the ramming, and Ek is the energy consumed by the air discharged by the falling of the rammer;
the energy Ek consumed by the ram to expel air when it falls is the integral of the air resistance to a certain height and the height over the entire fall height, namely Wherein F is the air resistance F= (1/2) xCxρ S x V, g=9.8 m/S, C=0.7, ρ=1.293 g/l, where Ei is the ramming energy of the ith ramming, ek is the energy consumed by the ram to expel air when it falls, F is the air resistance of the ram at the h point from the roadbed to be rammed, C is the air resistance coefficient, ρ is the air density, S is the contact area of the ram with the roadbed to be rammed, and g is the gravitational acceleration.
Specifically, the invention uses the ramming energy and the ramming curve, the slope of the curve is the corresponding ramming energy change rate of each point ramming, namely the adjustment coefficient of the ramming energy, so that the ramming energy of the next ramming is dynamically adjusted, the energy consumed by the falling and exhausting air of the rammer is considered, the calculation of the ramming energy is more accurate, and the ramming effect of a single ramming point is ensured to reach the expectations.
Specifically, the method takes half of the shortest side length of the ramming plane as the radius, any point which ensures that a circle is completely positioned in the ramming plane as the circle center, a plurality of points are taken at the length of the round edge, the height difference between each point and the circle center is measured, the height differences are summed and averaged, the ratio of the radius of the circle to the average value to the radius of the circle is the actual flatness, for example, a rectangular area with the ramming plane of 5 multiplied by 4m is taken as the radius, on the premise that the whole circle is ensured to be positioned in the rectangular area, any point is taken as the circle center, 5 points are selected on the circle center, the height difference between each point and the circle center is measured to be 0.4m, 0.1m, 0m and 0m, the average value of the height difference between each point and the circle center is measured to be 0.1m, and the flatness of the ramming plane is 95%.
Specifically, the invention uses a new actual flatness calculation method, uses a random area in the rammed plane as a value point, ensures the scientificity of the value, saves the time for measuring and calculating the actual flatness on the basis of ensuring that the actual flatness has practical significance, and improves the construction efficiency.
Specifically, the standard flatness is preset, the difference value of the actual flatness and the standard flatness is compared, the flatness of the roadbed to be tamped is judged to be qualified when the absolute difference value of the actual flatness and the standard flatness is smaller than a fixed value, the roadbed to be tamped is judged to have defects when the absolute difference value of the actual flatness and the standard flatness is within a certain range, and the flatness of the roadbed to be tamped is judged to be unqualified when the absolute difference value of the actual flatness and the standard flatness is out of the range.
Specifically, the method classifies the absolute difference between the actual flatness of the roadbed to be tamped and the standard flatness of the roadbed to be tamped, saves the efficiency of subsequent adjustment, and saves the construction time.
Specifically, when the flatness of the roadbed to be tamped is judged to be qualified, the target frequency of the next tamping period is not adjusted, when the flatness of the roadbed to be tamped is judged to have defects, the target frequency of the next tamping period is adjusted to be 1/2 of the target frequency corresponding to the previous tamping period, when the flatness of the roadbed to be tamped is judged to be unqualified, the target frequency of the next tamping period is adjusted to be 1, and secondary judgment is carried out on the actual flatness after tamping according to the adjusted target frequency in the next tamping period. For example, the target number of initial ramming cycles is set to 1000 times, when the target number of ramming cycles is reached for the first time, that is, the flatness of the rammed plane after the first thousand ramming is judged, the judgment result is qualified, the target number of next ramming cycles is not adjusted, when the target number of ramming cycles is reached for the second time, that is, the flatness of the rammed plane after the second thousand ramming is judged, the judgment result is that flaws exist, the target number of next ramming cycles is adjusted to 500 times, when the target number of ramming cycles is reached for the third time, that is, the flatness of the rammed plane after the second thousand five hundred ramming is judged, the judgment result is that flaws exist, and the target number of next ramming cycles is adjusted to 250 times.
Specifically, the method adjusts the target times of the tamping periods according to the classification result of the planeness of the tamping plane when the target times of the tamping periods are reached, so that the planeness of the tamping plane is ensured under the condition that the detection time of the planeness of the tamping plane is saved.
Specifically, the maximum continuous measurement threshold is set to be five times, when the flatness of the roadbed to be tamped is detected to be unqualified, the target frequency of the next tamping period is adjusted to be 1, namely continuous measurement is performed, when the flatness of the first continuous measurement is unqualified, the second continuous measurement is performed, the third continuous measurement is performed, the fourth continuous measurement is performed, the tamping is stopped until the fifth continuous measurement is performed, and the need of replacing the tamping hammer is judged.
Specifically, the invention protects the measuring device through the set maximum continuous measurement threshold value, and timely stops the tamping under the condition that the flatness is continuously disqualified, thereby ensuring the flatness of the plane to be tamped.
As shown in fig. 2, the embodiment of the present invention further provides a roadbed construction system using a gangue blend, which applies the roadbed construction method using a gangue blend as described above, the system comprising:
The first determining module 10 is configured to determine the number of times of compaction to be performed for any point to be compacted in the roadbed to be compacted under the condition of the actual thickness of the roadbed to be compacted according to the compaction energy-number of times of compaction curve, where a plurality of points to be compacted are arranged in the roadbed to be compacted;
a second determination module 20 for determining an ith actual ramming course of the roadbed to be tamped after completing an ith ramming of the number of times of performing the ramming of the point to be tamped;
a setting module 30 for presetting an ith standard tamper D and a standard flatness corresponding to the ith tamper;
A third determining module 40 for determining whether to adjust the ramming energy Ei+1 in the process of the ramming times to be executed according to the relation between the ith actual ramming process and the ith standard ramming process in the ramming process of the point to be rammed;
The detection module 50 is used for counting the actual execution ramming times of the roadbed to be rammed, and detecting the flatness of the roadbed to be rammed after the actual ramming of the target times when the actual execution ramming times reach the target times corresponding to the current ramming period, so as to obtain the actual flatness;
A comparison module 60, configured to determine a comparison result by comparing the actual flatness with the standard flatness;
an adjustment module 70 adjusts the target number of times during the next ram cycle based on the comparison.
Specifically, the roadbed construction system using the gangue mixture in the embodiment of the invention can achieve the same technical effects as the roadbed construction method using the gangue mixture, and is not described herein.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will be within the scope of the present invention.
The foregoing description is only of the preferred embodiments of the invention and is not intended to limit the invention; various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The roadbed construction method by utilizing the gangue mixture is characterized by comprising the following steps of:
determining the number of times of compaction to be performed on any point to be compacted in the roadbed to be compacted under the actual thickness condition of the roadbed to be compacted according to the compaction energy-compaction number curve, wherein a plurality of points to be compacted are arranged in the roadbed to be compacted;
determining an ith actual ramming course of a roadbed to be rammed after finishing the ith ramming in the times of the to-be-performed ramming of a point to be rammed;
Presetting an ith standard tamping procedure D and a standard flatness W corresponding to the ith tamping;
Determining whether to adjust the ramming energy Ei+1 in the process of the number of times of ramming to be executed according to the relation between the ith actual ramming process and the ith standard ramming process in the ramming process of the point to be rammed;
counting the actual execution ramming times of the roadbed to be rammed, and detecting the flatness of the roadbed to be rammed after the actual ramming of the target times when the actual execution ramming times reach the target times corresponding to the current ramming period, so as to obtain the actual flatness;
classifying by the absolute difference value of the actual flatness and the standard flatness to obtain a classification result;
Adjusting the target times in the next tamping period according to the classification result;
determining an ith actual ramming course of a roadbed to be rammed after finishing an ith ramming in the times of the to-be-performed ramming of a point to be rammed;
Selecting any direction at the center point of a region to be tamped before the i-th tamping, burying a plurality of first observation marks at intervals with any length on the premise of ensuring that the first observation marks are positioned in the region to be tamped, burying a plurality of second observation marks at intervals with any length on the premise of ensuring that the second observation marks are positioned in the region to be tamped in the vertical direction of the selected direction, measuring the vertical heights of the first observation marks and the second observation marks through a level meter, and taking the average value of the height of the first observation marks and the height of the second observation marks as L0;
After the ith ramming, observing the vertical heights of the embedded first observation mark and the embedded second observation mark through a level meter, taking an average value of the vertical heights of the first observation mark and the second observation mark, and marking the average value as L, wherein the difference value between the L and the LO is the ith actual ramming process.
2. The method for constructing a roadbed using a gangue mixture according to claim 1, wherein the determining the number of times of compaction to be performed for any point to be compacted in the roadbed to be compacted under the condition of the actual thickness of the roadbed to be compacted according to the compaction energy-number of times of compaction curve comprises:
Selecting a first roadbed to be tested, which is the same as the actual thickness of the roadbed to be tamped;
The method comprises the steps of performing tamping on any tamping point in a first roadbed to be tested according to standard tamping energy until the actual thickness of the first roadbed to be tested reaches a target thickness, and counting the tamping times performed until the target thickness is reached by the standard tamping energy;
and taking the ramming times as the ramming times to be executed for the roadbed to be rammed.
3. The method for constructing a roadbed using a gangue mixture according to claim 2, wherein the determining whether to adjust the impact energy ei+1 during the number of times of the impact to be performed according to the relation between the i-th actual impact and the i-th standard impact during the impact of the point to be impact comprises:
The allowable tamper error D0 is preset;
Setting Deltad= |D-Dn|, dn is the ith actual compaction process, D is the ith standard compaction process, and the unit is m;
If delta D is more than or equal to D0, judging that the tamping stroke error of the tamping is overlarge, and adjusting the tamping energy in the process of the times of the tamping to be executed;
If Deltad is less than D0, the compaction is judged to be qualified, and the adjustment of the compaction energy in the process of the times of compaction to be executed is not needed.
4. A roadbed construction method using a gangue mixture according to claim 3, wherein when the adjustment of the ramming energy in the process of the number of times of ramming to be performed is required;
Selecting a second roadbed to be tested, which is the same as the actual thickness of the roadbed to be tamped;
Respectively tamping different tamping points of the second roadbed to be tested under different tamping energies, recording the tamping ranges of the tamping points to be tested corresponding to the tamping energies, and drawing the tamping energies and the tamping ranges curves;
Taking the slope of the tamping energy and the tamping curve as an adjustment coefficient sigma of the tamping energy of the times of tamping to be executed;
Determining air resistance according to the falling height of the rammer and the contact area of the rammer and the roadbed to be rammed in the ith ramming process;
Calculating the actual absolute difference value of the ith actual ramming program and the ith standard ramming program;
calculating ramming energy according to formula (1) based on the actual absolute difference, the adjustment factor and the air resistance;
Ei+1=Ei×△d×σ+Ek （1），
wherein Δd= |d-dn|, ek= ，i＞1，F=(1/2)×C×ρ×S×/>,V=g×/>,g=9.8/>C=0.7, ρ=1.293 g/l, where Ei is the ramming energy of the ith ramming, ek is the energy consumed by the discharge of air when the ram falls, F is the air resistance of the ram at the point h from the road bed to be rammed, C is the air resistance coefficient, ρ is the air density, S is the contact area of the ram with the road bed to be rammed, g is the gravitational acceleration.
5. The method for constructing a roadbed using a gangue mixture according to claim 4, wherein the detecting the flatness of the roadbed to be tamped after the actual tamping for the target number of times, obtaining the actual flatness Wn comprises:
In the ramming plane, half of the shortest side length of the plane is taken as radius R, any point of the circle in the ramming plane can be ensured to be the circle center, m points are selected on the side length of the circle, the height difference between each point and the circle center is measured and recorded as Ym, and the average height difference is ya= ，Wn=（R-Ya）/R。
6. The method of constructing a subgrade using a gangue mat blend as claimed in claim 5, wherein said classifying according to the absolute difference between said actual flatness and said standard flatness comprises:
calculating an absolute difference DeltaW= |W-Wn| between the actual flatness and the standard flatness;
If delta W is less than or equal to 0.05, judging that the flatness of the roadbed to be tamped is qualified;
If the delta W is less than or equal to 0.05 and less than or equal to 0.1, judging that the flatness of the roadbed to be tamped has defects;
and if delta W is more than 0.1, judging that the flatness of the roadbed to be tamped is unqualified.
7. The method of constructing a subgrade using a coal gangue mixture as claimed in claim 6, wherein adjusting said target number of times during the next ramming cycle based on said classification result comprises;
When the flatness of the roadbed to be tamped is qualified, the target times of the next tamping period are not adjusted;
when judging that the flatness of the roadbed to be tamped has defects, adjusting the target number of the next tamping period to be
1/2 Of the target number corresponding to the last ramming period;
When the flatness of the roadbed to be tamped is judged to be unqualified, the target frequency of the next tamping period is adjusted to be 1, tamping is carried out in the next tamping period according to the adjusted target frequency, and the actual flatness after tamping is judged secondarily.
8. The method for constructing a roadbed using a gangue mixture according to claim 7, wherein the performing the tamping according to the adjusted target number of times in the next tamping cycle, and performing the secondary determination on the actual flatness after the tamping comprises:
Setting the maximum continuous measurement threshold value to be five times;
and stopping tamping when the number of continuous measurement reaches a set maximum continuous measurement threshold value, and judging that the rammer for ramming the roadbed to be rammed needs to be replaced.
9. A roadbed construction system to which the roadbed construction method using a gangue mixture according to any one of claims 1 to 8 is applied, comprising:
The first determining module is used for determining the number of times of compaction to be performed on any point to be compacted in the roadbed to be compacted under the condition of the actual thickness of the roadbed to be compacted according to the compaction energy-compaction number curve, and a plurality of points to be compacted are arranged in the roadbed to be compacted;
The second determining module is used for determining an ith actual ramming course of the roadbed to be rammed after finishing the ith ramming in the times of the execution of the ramming of the point to be rammed;
The setting module is used for presetting an ith standard tamping procedure D and standard flatness corresponding to the ith tamping;
The third determining module is used for determining whether to adjust the ramming energy Ei+1 in the process of the ramming times to be executed according to the relation between the ith actual ramming process and the ith standard ramming process in the process of ramming the point to be rammed;
the detection module is used for counting the actual execution ramming times of the roadbed to be rammed, and detecting the flatness of the roadbed to be rammed after the actual ramming of the target times when the actual execution ramming times reach the target times corresponding to the current ramming period, so as to obtain the actual flatness;
The comparison module is used for determining a comparison result through the comparison of the actual flatness and the standard flatness;
and the adjusting module is used for adjusting the target times in the next tamping period according to the comparison result.
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| CN104074181A (en) * | 2014-06-24 | 2014-10-01 | 中北大学 | Method for defining and calculating compaction and settlement ratio so as to determine optimal compaction times |
| CN113529652A (en) * | 2021-07-16 | 2021-10-22 | 江苏筑港建设集团有限公司 | Energy-saving and environment-friendly foundation bed tamping construction process |
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| RU2186174C2 (en) * | 2000-06-13 | 2002-07-27 | Открытое акционерное общество "Всероссийский научно-исследовательский институт гидротехники им. Б.Е. Веденеева" | Procedure determining technological characteristics of cohesive soil compacted by mechanisms |
| CN114277765B (en) * | 2022-01-13 | 2024-06-14 | 中交二航局广西建设工程有限公司 | Automatic detection method for ramming settlement of dynamic compactor |
| CN115029974A (en) * | 2022-05-30 | 2022-09-09 | 广西双建工程咨询有限公司 | Construction method for widening and filling solidified soil of expressway intercommunicating ramp roadbed |
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| CN104074181A (en) * | 2014-06-24 | 2014-10-01 | 中北大学 | Method for defining and calculating compaction and settlement ratio so as to determine optimal compaction times |
| CN113529652A (en) * | 2021-07-16 | 2021-10-22 | 江苏筑港建设集团有限公司 | Energy-saving and environment-friendly foundation bed tamping construction process |
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