CN109235415A - A kind of novel 15000 kilonewton meter rammer energy dynamic compaction method - Google Patents
A kind of novel 15000 kilonewton meter rammer energy dynamic compaction method Download PDFInfo
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- CN109235415A CN109235415A CN201811237635.8A CN201811237635A CN109235415A CN 109235415 A CN109235415 A CN 109235415A CN 201811237635 A CN201811237635 A CN 201811237635A CN 109235415 A CN109235415 A CN 109235415A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/046—Improving by compacting by tamping or vibrating, e.g. with auxiliary watering of the soil
Abstract
The invention belongs to consolidation technical fields, disclose a kind of novel 15000 kilonewton meter rammer energy dynamic compaction method, first pass is rammed, it rams point by point, main rammer energy level is 15000 kilonewton meters, it rams for second time, point is inserted using the main tamping point center of first pass to ram, main rammer energy level is 15000 kilonewton meters, third time is rammed, using to first, insert between two times point rammers and ram, inserting and ramming energy level is 6000 kilonewton meters, it rams for 4th time, it is rammed using full, tamping energy is 3000 kilonewton meters, 36.54 tons of hammer ram weight, it falls away from 8.2 meters, stationing mode is hammering overlap joint 1/4, it hits for every 2.15000 kilonewton meter strong rammer provided by the invention is rammed away from 8 × 8m, within the scope of 1-5m between pile body, stake and 6m pile body collapsibility is eliminated；It rams away from 10 × 10m, collapsibility is eliminated within the scope of 1-5m and 6m pile body collapsibility is eliminated.
Description
Technical field
The invention belongs to consolidation technical fields, more particularly to a kind of novel 15000 kilonewton meter to ram energy dynamic compaction method.
Background technique
Currently, the prior art commonly used in the trade is such that
Currently, the prior art commonly used in the trade is such that handling subgrade by intensity tamping is the 1960s by France
Menard technology company wound first, this method is freely to fall very heavy hammer (generally 100~400kN) from eminence
(falling away from generally 6~40m) gives ground with impact force and vibration, to improve the intensity of foundation soil and reduce its compressibility.This
Method, which is used initially only in, reinforces sand and foundation of gravelly soil.By the application and development of more than ten years, it has been suitable for reinforcing from gravel
To all kinds of foundation soils of cohesive soil, this is mainly due to the improvement of the improvement of construction method and drainage condition, and heavy-tamping method is due to tool
It is effective it is significant, equipment is simple, easy for construction, applied widely, economy and facility and the advantages that save material, travel to generation quickly
Boundary various regions.
Loess is distributed quite extensive as the secondary substance for forming ground mulching layer.In China, loess area coverage is more
Up to 600,000 km2,6% of national territorial area or more is accounted for, wherein northwest loess plateau is the area that China's collapsible loess is most concentrated.Cause
This, processing and technology to collapsible loess, discussion economically are one and both real and in the urgent need to address ask
Topic, treating collapsible loess foundation by dynamic compaction technology are largely used in construction and obtain huge achievement.
In conclusion problem of the existing technology is:
The prior art is unable to Compaction variables within the scope of 1-5m；Soil body compactness cannot be effectively increased.
In the prior art, energy strong rammer is rammed for 15000 kilonewton meters accurately to analyze the collapsibility effect shortage of soil, it is right
Lack in the relationship that the energy and processing depth of high energy dynamic compaction are presented and instruct, whether single increasing rammer can effectively be increased
Add to eliminate collapsibility of loess and increase soil body compactness and lacks theories integration.
Summary of the invention
In view of the problems of the existing technology, ramming the present invention provides a kind of novel 15000 kilonewton meter can dynamic compaction method.
It is mainly comprised the steps that the invention is realized in this way a kind of novel 15000 kilonewton meter rams energy dynamic compaction method
Step 1: progress first pass first is rammed, and using ramming point by point, main rammer energy level is 15000 kilonewton meters, hammer ram weight
74.54 tons of amount is fallen away from 20.53 meters, and tamping point form presses 10m × 10m arranged in squares, and tamping point spacing 10m, that puts rammer rams number not
It is hit less than 10, last two hit average ramming volume≤100mm；
Step 2: secondly ram for second time, inserts point using the main tamping point center of first pass and rams, main rammer energy level is
15000 kilonewton meters, are fallen away from 20.53 meters by 74.54 tons of hammer ram weight, and tamping point form presses 10m × 10m arranged in squares, between tamping point
Away from 10m, the number of ramming for putting rammer no less than 10 is hit, and last two hit average ramming volume≤100mm；
Step 3: and then third is carried out all over ramming, it is rammed using insert between ramming first and second time point, inserts and ram energy
Grade is 6000 kilonewton meters, 36.54 tons of hammer ram weight, is fallen away from 16.5 meters, tamping point form presses 10m × 10m arranged in squares, tamping point
Spacing 10m, the number of ramming for putting rammer no less than 10 are hit, and last two hit average ramming volume≤100mm；
Step 4: finally ram for the 4th time, be rammed using full, and tamping energy is 3000 kilonewton meters, hammer ram weight
It 36.54 tons, falls away from 8.2 meters, stationing mode is hammering overlap joint 1/4, and every 2 is hit.
Another object of the present invention be to provide it is a kind of using novel 15000 kilonewton meter ram can dynamic compaction method ram
Ground.
Another object of the present invention is to provide one kind to ram saturated yielding in energy dynamic compaction method to novel 15000 kilonewton meter
Property and soil body compactness analysis method, the collapsibility and soil body compactness analysis method include:
The computerized control strong rammer energy level of strong rammer equipment of benefit is more than 15000 kilonewton meters；Utilize collapsibility inductor, soil
Saturated yielding value, the soil body compactness value of the body compactness inductor ground that real-time monitoring is rammed respectively, and the numerical value that will test passes through
Signal is transferred to computer and obtains strong rammer energy level and collapsibility and the soil body after computer carries out processing analysis to the signal of transmission
The relationship of compactness.
Further, the saturated yielding value of collapsibility inductor, soil body compactness the inductor ground that real-time monitoring is rammed respectively, soil
In the closely knit angle value of body,
In the saturated yielding value for the ground that the monitoring of collapsibility inductor is rammed, different preference letters is selected according to the characteristics of each attribute
Number, all properties are all profit evaluation models, and the size of preference function value represents the size for the relationship that is dominant between scheme, and strong rammer energy level is more than
15000KN.M scheme a and strong rammer energy level are more than the attribute value f of the attribute j of the Vague form of 15000KN.M scheme bj(a), fj
(b) it is respectively as follows:
Calculate the value of preference function:
It calculates preference index Π (a, b):
The Π (a, b) of any two scheme is calculated, calculates flow into accordingly, outflow and net flow index；
Outflow:
It flows into:
Net flow:
Φ (a)=Φ+(a)-Φ-(a)=(_ (a), g (a))；
Wherein, _ (a) represents scheme and agrees with being worth, and g (a) indicates the opposition value of scheme；
The preferential index S (a) of numerical procedure:
S (a)=_ (a)-g (a)；
The transmission function of soil body compactness inductor are as follows:
Wherein, ω0For the centre frequency of filter, for different ω0, k makes k/ ω0It remains unchanged；
In frequency domain construction filter, corresponding polar coordinates expression way are as follows:
G (r, θ)=G (r, r) G (θ, θ)；
In formula, GrIt (r) is the radial component of control filter bandwidht, Gθ(θ) is the angle component for controlling filter direction；
R indicates that radial coordinate, θ indicate angle coordinate, f0For center frequency, θ0For filter direction, σfFor determining band
It is wide；
Bf=2 (2/ln2) 1/2 | ln σf|, σθDetermine angular bandwidth, θ=2 B (2/ln2) 1/2 σθ；
After computer carries out processing analysis to the signal of transmission, the pass of strong rammer energy level and collapsibility and soil body compactness is obtained
In system, handled by signal of the integrated processing module to collapsibility inductor, the transmission of soil body compactness inductor, specifically
Include:
Step 1: determining analysis object and expert's collection: X is the entire objects collection investigated, and is denoted as X={ x1,x2,...xNBe
It participates in determining that the expert of index weights integrates as P={ p1,p2...pL}；
Step 2: being the sequence of each index using set value iterative method: weight is { λ1,λ2,...λL, according to weight in index set
Degree is wanted to be ranked up index, the index ordered set that k (1≤k≤L) chooses is Xk=(x3,x5,x1,xN...,xN-1), in formula
x3Positioned at XkFirst position, i.e., expression x3Think most important in k, according to each index in XkIn position assign referring to respectively
Score is marked, in XkMiddle x3It is corresponding to be scored at N, x5It is corresponding to be scored at N-1, xN-1It is corresponding to be scored at 1；
μi,k(1≤i≤N, 1≤k≤L) is index i score obtained at k, is enabledIt is commented as synthesis
Point, 1≤i≤N in formula, according to giIt is descending analysis indexes are carried out with new sequence,
Step 3: being compared acquisition comparator matrix to adjacent analysis index respectively；
By comparing the significance level of the relatively latter index of previous index in adjacent index, analystal section, section end are provided
Point value takes adjacent rkNumerical value, relative importance are between two r of the twokBetween the corresponding significance level of numerical value；
Step 4: converting point value by following formula for section:
In formula, r 'ijIt is expert i to the lower bound in the analysis matrix of index j, r "ijFor the upper bound in analysis matrix, j=1,
2 ..., n-1；
Step 5: determining the weight of analysis indexes: it is compared since N number of index is adjacent, obtains N-1 fiducial value:
In formula: r1Significance level of the meaning represented as first index after rearrangement relative to second index,
With the ratio between the absolutely essential degree of first index and second indexIt illustrates,
Comprehensive weight are as follows:
The weight of other indexs are as follows:
Obtain the relationship of strong rammer energy level and collapsibility and soil body compactness.
Another object of the present invention is to provide a kind of calculating for realizing the collapsibility and soil body compactness analysis method
Machine program.
Another object of the present invention is to provide a kind of information for realizing the collapsibility and soil body compactness analysis method
Data processing terminal.
Another object of the present invention is to provide a kind of computer readable storage mediums, including instruction, when it is in computer
When upper operation, so that computer executes the collapsibility and soil body compactness analysis method.
In conclusion advantages of the present invention and good effect are as follows:
15000 kilonewton meter strong rammer provided by the invention is rammed away from 8 × 8m, within the scope of 1-5m between pile body, stake and 6m pile body is wet
Property is fallen into eliminate；It rams away from 10 × 10m, collapsibility is eliminated within the scope of 1-5m and 6m pile body collapsibility is eliminated；By to test process inspection
It surveys and test result analysis, raising rammer can have certain effect to the collapsibility of soil, solve energy and the processing of high energy dynamic compaction
Depth is not linear, and single increasing, which rams not effectively increasing, eliminates collapsibility of loess and increase soil body compactness
The problem of.
Excessive protuberance should not occur for ground around tamping pit during the present invention rams.Not because of tamping pit during ramming
It is too deep and to mention hammer difficult, in case of this situation can be filled out when ramming.Examination is continuously rammed during ramming, and the rainy day forbids examination to ram.
In strong rammer process monitoring of the present invention,
(1) ramming volume analysis is rammed and added up to single-point:
It rams when away from for 8 × 8m (as shown in Figure 5)
1. by first pass rammer rammed away from 8 × 8 single-points and cumulative amount analyze, ram hit number when the 1st hits settling amounts it is big
In 1m, ram to hit number the 6th and hit and start to be less than 0.15m, hit the 7th, settling amount is unchanged when the 8th hits, ground without obvious protuberance, and
Accumulative settling amount has tended towards stability.
2. show the monitoring of the overall process of the main tamping point of first pass to amount to the tamping pit settling amount of 8 tamping points in 2.28-2.91m,
Average hole depth 2.17m.Tamping pit peripheral ground protuberance is unobvious during ramming, and illustrates that compaction effect validity is higher.
It is found 3. ramming second time away from 10 × 10 single-point single-point by second time and ramming analysis, rams and hit number sedimentation when the 1st hits
Amount is 1m, rams to hit and is respectively less than 0.1cm after number the 4th is hit, and is hit the 8th, 9 hit and do not settle, is increased, the 10th, which hits settling amount, is
0.1cm, ground is without obvious protuberance.
4. show the overall process monitoring of second time main tamping point to amount to the tamping pit settling amount of 4 tamping points in 2.0-2.29m,
Average hole depth 2.2m.The main tamping point of first pass is compared, tamping pit settling amount differs 0.03m.
It rams when away from for 10 × 10m (as shown in Figure 6)
1. by first pass rammer rammed away from 10 × 10 single-points and cumulative amount analyze, ram hit number when the 1st hits settling amounts
1.49m, rams to hit number the 6th and hit and starts to be less than 0.15m, and when the 8th hits, settling amount is unchanged, and accumulative settling amount has tended to be flat
Slow, the 9th hits, the 10th to hit settling amount be respectively 0.03m, 0.04m, and ground is without obvious protuberance.
2. show the monitoring of the overall process of the main tamping point of first pass to amount to the tamping pit settling amount of 8 tamping points in 2.34-3.47m,
Average hole depth 2.94m.Tamping pit peripheral ground protuberance is unobvious during ramming, and illustrates that compaction effect validity is higher.
It is found 3. ramming second time away from 10 × 10 single-point single-point by second time and ramming analysis, rams and hit number sedimentation when the 1st hits
Amount is 1.21m, rams and hits respectively less than 0.15m after number the 5th is hit, and settling amount is 0.1m after hitting the 8th, and ground is without obvious grand
It rises.
4. show the overall process monitoring of second time main tamping point to amount to the tamping pit settling amount of 4 tamping points in 2.38-3.07m,
Average hole depth 2.815m.The main tamping point of first pass is compared, tamping pit settling amount differs 0.125m.
(2) test site settling amount compares after strong rammer
Table 1
Dynamic compaction test interpretation of result:
15000 kilonewton meters ram energy, and away from 8 × 8m, the wet density within the scope of 1m-4m is greater than 1.7g/cm to rammer3, within the scope of 4-8m
Wet density is gradually reduced, minimum value 1.5g/cm3.Away from 10 × 10m, the wet density within the scope of 1m-4m is greater than 1.7g/cm to rammer3, 4-8m
Wet density is gradually reduced in range, minimum value 1.5g/cm3.It rams wet away from 8 × 8m less than ramming in 4m or less wet density away from 10 × 10m
Density.
15000 kilonewton meters ram energy, and away from 8 × 8m, the dry density within the scope of 1m-4m is greater than 1.68g/cm to rammer3, 4-8m range
Interior dry density is gradually reduced, minimum value 1.48g/cm3.Away from 10 × 10m, the dry density within the scope of 1m-4m is greater than 1.6g/cm to rammer3, 4-
Dry density is gradually reduced within the scope of 8m, minimum value 1.49g/cm3。
By finding that wet density and dry density all increase within the scope of 1-4m to wet density, dry density analysis, explanation
15000 kilonewton meter strong rammers influence depth when not filling the water humidification obviously weakens in 4m, the impact effect native to 4m or less,
As shown in Figure 7, Figure 8.
By comparison coefficient of collapsibility variation, collapsibility within 6m can be eliminated away from 10 × 10m away from 8 × 8m and rammer by ramming, but
Variation between pile body and stake is obvious, unstable, and curvilinear motion amplitude is larger, during construction in later period be difficult to control, as Fig. 9,
Shown in Figure 10.
15000 kilonewton meter strong rammers are rammed away from 8 × 8m, within the scope of 1-5m between pile body, stake and 6m pile body collapsibility is eliminated, 6-
8m coefficient of collapsibility reduces, but non-Compaction variables.
15000 kilonewton meter strong rammers are rammed away from 10 × 10m, and collapsibility is eliminated within the scope of 1-5m and 6m pile body collapsibility is eliminated,
6-8m coefficient of collapsibility reduces, but non-Compaction variables, and 6-8m coefficient of collapsibility is greater than rammer away from 8 × 8m result.
It rams by improving to the detection of test process and test result analysis and can have certain effect to the collapsibility of soil, but is wet
Sunken property amplitude of variation is larger, and the energy and processing depth of high energy dynamic compaction be not linear, and single increasing rammer can be not
It can effectively increase and eliminate collapsibility of loess and increase soil body compactness.
Detailed description of the invention
Fig. 1 is that novel 15000 kilonewton meter provided in an embodiment of the present invention rams energy dynamic compaction method flow chart；
Fig. 2 is 10m × 10m examination tamping point floor plan provided in an embodiment of the present invention；
Fig. 3 is 8m × 8m examination tamping point floor plan provided in an embodiment of the present invention；
Fig. 4 is completely rammer tamping point layout drawing provided in an embodiment of the present invention；
Fig. 5 is that ramming volume curve graph is rammed away from 8 × 8m single-point and added up to rammer provided in an embodiment of the present invention；
Fig. 6 is that ramming volume curve graph is rammed away from 10 × 10m single-point and added up to rammer provided in an embodiment of the present invention；
Fig. 7 is wet density change curve provided in an embodiment of the present invention；
Fig. 8 is dry density change curve provided in an embodiment of the present invention；
Fig. 9 is water-cut variation curve graph provided in an embodiment of the present invention；
Figure 10 is coefficient of collapsibility change curve provided in an embodiment of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
Application principle of the invention is described in detail with reference to the accompanying drawing.
As shown in Figure 1, it mainly includes following that novel 15000 kilonewton meter provided in an embodiment of the present invention, which rams energy dynamic compaction method,
Step:
S101: progress first pass first is rammed, and using ramming point by point, main rammer energy level is 15000 kilonewton meters, hammer ram weight
It 74.54 tons, falls away from 20.53 meters, tamping point form presses 10m × 10m arranged in squares, and tamping point spacing 10m, that puts rammer rams number much
It is hit in 10, last two hit average ramming volume≤100mm；
S102: secondly ram for second time, inserts point using the main tamping point center of first pass and rams, main rammer energy level is 15000
Kilonewton meter, is fallen away from 20.53 meters, tamping point form presses 10m × 10m arranged in squares, tamping point spacing by 74.54 tons of hammer ram weight
10m, the number of ramming for putting rammer no less than 10 are hit, and last two hit average ramming volume≤100mm；
S103: and then third is carried out all over ramming, it is rammed using insert between ramming first and second time point, inserts and ram energy level
It for 6000 kilonewton meters, 36.54 tons of hammer ram weight, falls away from 16.5 meters, tamping point form presses 10m × 10m arranged in squares, between tamping point
Away from 10m, the number of ramming for putting rammer no less than 10 is hit, and last two hit average ramming volume≤100mm；
S104: finally ram for the 4th time, be rammed using full, and tamping energy is 3000 kilonewton meters, hammer ram weight
It 36.54 tons, falls away from 8.2 meters, stationing mode is hammering overlap joint 1/4, and every 2 is hit.
It is provided in an embodiment of the present invention ram during around tamping pit ground excessive protuberance should not occur.
Provided in an embodiment of the present invention ram does not propose hammer difficulty because tamping pit is too deep in the process, in case of this situation can side
Side is rammed to fill out.
Examination provided in an embodiment of the present invention is continuously rammed during ramming, and the rainy day forbids examination to ram.
Fig. 2 is 10m × 10m examination tamping point floor plan provided in an embodiment of the present invention；In figure: 1 indicates first pass tamping point；
2 indicate second time tamping point；3 indicate the tamping point；
Fig. 3 is 8m × 8m examination tamping point floor plan provided in an embodiment of the present invention；In figure: 1 indicates first pass tamping point；2
Indicate second time tamping point；3 indicate the tamping point；
Fig. 4 is completely rammer tamping point layout drawing provided in an embodiment of the present invention.
It is that specific embodiment makees the present invention below with reference to the zone of transition between Loess Plateau of North Shaanxi and Mu us dese
It further illustrates.
1, geologic aspects
Major landform includes that Loess Accumulation corrodes slope, wind flood plain, alluvial-proluvial fan:
1) loess slope is corroded in accumulation: being located at Project Areas loess plateau of southern north slope, northwards with 5~10 ° of gentle slopes gradually mistake
It crosses to flood plain, 1550~1430 meters of elevation, is mainly made of upper Pleistocene series aeolian deposit loess, Loessial loam.
2) wind flood plain: being located to the north of loess slope, and the wide geographic area between low and slow beam hilllock connects for beach beam trough valley or depression
It is accumulated, landform is flat open, 1326~1408m of absolute elevation, predominantly updates system wind diluvial loam composition.
3) alluvial-proluvial fan: being distributed mainly on loess slope frontal zone, ground even, and absolute elevation 1396.0~
1400.0m is rushed proluvial sandy loam by updating system and is formed with 1~2 ° of gentle slope northwards low dip.
2, levee foundation ground is sketched
Levee foundation ground soil layer is loess and sandy loam, is loess, average dry density ρ d=1.33g/ in the left dam abutment of storage pond
cm3, compressed coefficient a1~2=0.85Mpa-1, belong to high compression soil, saturation cuts C=8kpa, Ф=17, vertical permeability coefficient KV fastly
=4.58 × 10-5Cm/s is weak water penetration, characteristic load bearing capacity fak=120kpa；Levee foundation is sandy loam, average dry density ρ d
=1.36g/cm3, compressed coefficient a1~2=0.67Mpa-1, belong to high compression soil, saturation cuts C=16.0kpa, Ф=14.0 fastly·, hold
Carry power characteristic value fak=140kpa.
3, strong rammer process monitoring
(1) ramming volume analysis is rammed and added up to single-point
It rams when away from for 8 × 8m (as shown in Figure 5)
1. by first pass rammer rammed away from 8 × 8 single-points and cumulative amount analyze, ram hit number when the 1st hits settling amounts it is big
In 1m, ram to hit number the 6th and hit and start to be less than 0.15m, hit the 7th, settling amount is unchanged when the 8th hits, ground without obvious protuberance, and
Accumulative settling amount has tended towards stability.
2. show the monitoring of the overall process of the main tamping point of first pass to amount to the tamping pit settling amount of 8 tamping points in 2.28-2.91m,
Average hole depth 2.17m.Tamping pit peripheral ground protuberance is unobvious during ramming, and illustrates that compaction effect validity is higher.
It is found 3. ramming second time away from 10 × 10 single-point single-point by second time and ramming analysis, rams and hit number sedimentation when the 1st hits
Amount is 1m, rams to hit and is respectively less than 0.1cm after number the 4th is hit, and is hit the 8th, 9 hit and do not settle, is increased, the 10th, which hits settling amount, is
0.1cm, ground is without obvious protuberance.
4. show the overall process monitoring of second time main tamping point to amount to the tamping pit settling amount of 4 tamping points in 2.0-2.29m,
Average hole depth 2.2m.The main tamping point of first pass is compared, tamping pit settling amount differs 0.03m.
It rams when away from for 10 × 10m (as shown in Figure 6)
1. by first pass rammer rammed away from 10 × 10 single-points and cumulative amount analyze, ram hit number when the 1st hits settling amounts
1.49m, rams to hit number the 6th and hit and starts to be less than 0.15m, and when the 8th hits, settling amount is unchanged, and accumulative settling amount has tended to be flat
Slow, the 9th hits, the 10th to hit settling amount be respectively 0.03m, 0.04m, and ground is without obvious protuberance.
2. show the monitoring of the overall process of the main tamping point of first pass to amount to the tamping pit settling amount of 8 tamping points in 2.34-3.47m,
Average hole depth 2.94m.Tamping pit peripheral ground protuberance is unobvious during ramming, and illustrates that compaction effect validity is higher.
It is found 3. ramming second time away from 10 × 10 single-point single-point by second time and ramming analysis, rams and hit number sedimentation when the 1st hits
Amount is 1.21m, rams and hits respectively less than 0.15m after number the 5th is hit, and settling amount is 0.1m after hitting the 8th, and ground is without obvious grand
It rises.
4. show the overall process monitoring of second time main tamping point to amount to the tamping pit settling amount of 4 tamping points in 2.38-3.07m,
Average hole depth 2.815m.The main tamping point of first pass is compared, tamping pit settling amount differs 0.125m.
(2) test site settling amount compares after strong rammer
Table 1
4, dynamic compaction test interpretation of result
15000 kilonewton meters ram energy, and away from 8 × 8m, the wet density within the scope of 1m-4m is greater than 1.7g/cm to rammer3, within the scope of 4-8m
Wet density is gradually reduced, minimum value 1.5g/cm3.Away from 10 × 10m, the wet density within the scope of 1m-4m is greater than 1.7g/cm to rammer3, 4-8m
Wet density is gradually reduced in range, minimum value 1.5g/cm3.It rams wet away from 8 × 8m less than ramming in 4m or less wet density away from 10 × 10m
Density.
15000 kilonewton meters ram energy, and away from 8 × 8m, the dry density within the scope of 1m-4m is greater than 1.68g/cm to rammer3, 4-8m range
Interior dry density is gradually reduced, minimum value 1.48g/cm3.Away from 10 × 10m, the dry density within the scope of 1m-4m is greater than 1.6g/cm to rammer3, 4-
Dry density is gradually reduced within the scope of 8m, minimum value 1.49g/cm3。
By finding that wet density and dry density all increase within the scope of 1-4m to wet density, dry density analysis, explanation
15000 kilonewton meter strong rammers influence depth when not filling the water humidification obviously weakens in 4m, the impact effect native to 4m or less,
As shown in Figure 7, Figure 8.
By comparison coefficient of collapsibility variation, collapsibility within 6m can be eliminated away from 10 × 10m away from 8 × 8m and rammer by ramming, but
Variation between pile body and stake is obvious, unstable, and curvilinear motion amplitude is larger, during construction in later period be difficult to control, as Fig. 9,
Shown in Figure 10.
5, Test Summary
15000 kilonewton meter strong rammers are rammed away from 8 × 8m, within the scope of 1-5m between pile body, stake and 6m pile body collapsibility is eliminated, 6-
8m coefficient of collapsibility reduces, but non-Compaction variables.
15000 kilonewton meter strong rammers are rammed away from 10 × 10m, and collapsibility is eliminated within the scope of 1-5m and 6m pile body collapsibility is eliminated,
6-8m coefficient of collapsibility reduces, but non-Compaction variables, and 6-8m coefficient of collapsibility is greater than rammer away from 8 × 8m result.
It rams by improving to the detection of test process and test result analysis and can have certain effect to the collapsibility of soil, but is wet
Sunken property amplitude of variation is larger, and the energy and processing depth of high energy dynamic compaction be not linear, and single increasing rammer can be not
It can effectively increase and eliminate collapsibility of loess and increase soil body compactness.
Below with reference to concrete analysis, the invention will be further described.
Collapsibility provided in an embodiment of the present invention and soil body compactness analysis method, comprising:
The computerized control strong rammer energy level of strong rammer equipment of benefit is more than 15000 kilonewton meters；Utilize collapsibility inductor, soil
Saturated yielding value, the soil body compactness value of the body compactness inductor ground that real-time monitoring is rammed respectively, and the numerical value that will test passes through
Signal is transferred to computer and obtains strong rammer energy level and collapsibility and the soil body after computer carries out processing analysis to the signal of transmission
The relationship of compactness.
The saturated yielding value of collapsibility inductor, soil body compactness the inductor ground that real-time monitoring is rammed respectively, the soil body are closely knit
In angle value,
In the saturated yielding value for the ground that the monitoring of collapsibility inductor is rammed, different preference letters is selected according to the characteristics of each attribute
Number, all properties are all profit evaluation models, and the size of preference function value represents the size for the relationship that is dominant between scheme, and strong rammer energy level is more than
15000KN.M scheme a and strong rammer energy level are more than the attribute value f of the attribute j of the Vague form of 15000KN.M scheme bj(a), fj
(b) it is respectively as follows:
Calculate the value of preference function:
It calculates preference index Π (a, b):
The Π (a, b) of any two scheme is calculated, calculates flow into accordingly, outflow and net flow index；
Outflow:
It flows into:
Net flow:
Φ (a)=Φ+(a)-Φ-(a)=(_ (a), g (a))；
Wherein, _ (a) represents scheme and agrees with being worth, and g (a) indicates the opposition value of scheme；
The preferential index S (a) of numerical procedure:
S (a)=_ (a)-g (a)；
The transmission function of soil body compactness inductor are as follows:
Wherein, ω0For the centre frequency of filter, for different ω0, k makes k/ ω0It remains unchanged；
In frequency domain construction filter, corresponding polar coordinates expression way are as follows:
G (r, θ)=G (r, r) G (θ, θ)；
In formula, GrIt (r) is the radial component of control filter bandwidht, Gθ(θ) is the angle component for controlling filter direction；
R indicates that radial coordinate, θ indicate angle coordinate, f0For center frequency, θ0For filter direction, σfFor determining band
It is wide；
Bf=2 (2/ln2) 1/2 | ln σf|, σθDetermine angular bandwidth, θ=2 B (2/ln2) 1/2 σθ；
After computer carries out processing analysis to the signal of transmission, the pass of strong rammer energy level and collapsibility and soil body compactness is obtained
In system, handled by signal of the integrated processing module to collapsibility inductor, the transmission of soil body compactness inductor, specifically
Include:
Step 1: determining analysis object and expert's collection: X is the entire objects collection investigated, and is denoted as X={ x1,x2,...xNBe
It participates in determining that the expert of index weights integrates as P={ p1,p2...pL}；
Step 2: being the sequence of each index using set value iterative method: weight is { λ1,λ2,...λL, according to weight in index set
Degree is wanted to be ranked up index, the index ordered set that k (1≤k≤L) chooses is Xk=(x3,x5,x1,xN...,xN-1), in formula
x3Positioned at XkFirst position, i.e., expression x3Think most important in k, according to each index in XkIn position assign referring to respectively
Score is marked, in XkMiddle x3It is corresponding to be scored at N, x5It is corresponding to be scored at N-1, xN-1It is corresponding to be scored at 1；
μi,k(1≤i≤N, 1≤k≤L) is index i score obtained at k, is enabledIt is commented as synthesis
Point, 1≤i≤N in formula, according to giIt is descending analysis indexes are carried out with new sequence,
Step 3: being compared acquisition comparator matrix to adjacent analysis index respectively；
By comparing the significance level of the relatively latter index of previous index in adjacent index, analystal section, section end are provided
Point value takes adjacent rkNumerical value, relative importance are between two r of the twokBetween the corresponding significance level of numerical value；
Step 4: converting point value by following formula for section:
In formula, r 'ijIt is expert i to the lower bound in the analysis matrix of index j, r "ijFor the upper bound in analysis matrix, j=1,
2 ..., n-1；
Step 5: determining the weight of analysis indexes: it is compared since N number of index is adjacent, obtains N-1 fiducial value:
In formula: r1Significance level of the meaning represented as first index after rearrangement relative to second index,
With the ratio between the absolutely essential degree of first index and second indexIt illustrates,
Comprehensive weight are as follows:
The weight of other indexs are as follows:
Obtain the relationship of strong rammer energy level and collapsibility and soil body compactness.
In the above-described embodiments, can come wholly or partly by software, hardware, firmware or any combination thereof real
It is existing.When using entirely or partly realizing in the form of a computer program product, the computer program product include one or
Multiple computer instructions.When loading on computers or executing the computer program instructions, entirely or partly generate according to
Process described in the embodiment of the present invention or function.The computer can be general purpose computer, special purpose computer, computer network
Network or other programmable devices.The computer instruction may be stored in a computer readable storage medium, or from one
Computer readable storage medium is transmitted to another computer readable storage medium, for example, the computer instruction can be from one
A web-site, computer, server or data center pass through wired (such as coaxial cable, optical fiber, Digital Subscriber Line (DSL)
Or wireless (such as infrared, wireless, microwave etc.) mode is carried out to another web-site, computer, server or data center
Transmission).The computer-readable storage medium can be any usable medium or include one that computer can access
The data storage devices such as a or multiple usable mediums integrated server, data center.The usable medium can be magnetic Jie
Matter, (for example, floppy disk, hard disk, tape), optical medium (for example, DVD) or semiconductor medium (such as solid state hard disk Solid
State Disk (SSD)) etc..
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. a kind of novel 15000 kilonewton meter rams energy dynamic compaction method, which is characterized in that novel 15000 kilonewton meter rams energy
Dynamic compaction method includes:
Step 1: carrying out first pass and ram, and using ramming point by point, main rammer energy level is 15000 kilonewton meters, and tamping point form presses 10m
× 10m arranged in squares；
Step 2: ram for second time, inserts point using the main tamping point center of first pass and rams, main rammer energy level is 15,000,000 newton
Rice, tamping point form press 10m × 10m arranged in squares；
Step 3: third is carried out all over ramming, is rammed using insert between ramming first and second time point, inserting and ramming energy level is 6000
Kilonewton meter；
Step 4: ram for the 4th time, is rammed using full, and tamping energy is 3000 kilonewton meters,.
2. novel 15000 kilonewton meter as described in claim 1 rams energy dynamic compaction method, which is characterized in that in step 1, tamping point
Spacing 10m, the number of ramming for putting rammer no less than 10 are hit；
In step 2, tamping point spacing 10m, the number of ramming for putting rammer no less than 10 is hit.
3. novel 15000 kilonewton meter as described in claim 1 rams energy dynamic compaction method, which is characterized in that in step 3, tamping point
Spacing 10m, the number of ramming for putting rammer no less than 10 are hit.
4. novel 15000 kilonewton meter as described in claim 1 rams energy dynamic compaction method, which is characterized in that full to ram in step 4
When ramming, stationing mode is hammering overlap joint 1/4, and every 2 is hit.
5. a kind of ram the ground that energy dynamic compaction method is rammed using novel 15000 kilonewton meter described in claim 1.
6. novel 15000 kilonewton meter described in a kind of pair of claim 1 rams collapsibility and soil body compactness point in energy dynamic compaction method
Analysis method, which is characterized in that the collapsibility and soil body compactness analysis method include:
The computerized control strong rammer energy level of strong rammer equipment of benefit is more than 15000 kilonewton meters；It is close using collapsibility inductor, the soil body
Saturated yielding value, the soil body compactness value of the solidity inductor ground that real-time monitoring is rammed respectively, and the numerical value that will test passes through signal
It is transferred to computer, after computer carries out processing analysis to the signal of transmission, show that strong rammer energy level and collapsibility and the soil body are closely knit
The relationship of degree.
7. collapsibility as claimed in claim 6 and soil body compactness analysis method, which is characterized in that
Saturated yielding value, the soil body compactness value of collapsibility inductor, soil body compactness the inductor ground that real-time monitoring is rammed respectively
In,
In the saturated yielding value for the ground that the monitoring of collapsibility inductor is rammed, different preference functions is selected according to the characteristics of each attribute,
All properties are all profit evaluation models, and the size of preference function value represents the size for the relationship that is dominant between scheme, and strong rammer energy level is more than
15000KN.M scheme a and strong rammer energy level are more than the attribute value f of the attribute j of the Vague form of 15000KN.M scheme bj(a), fj
(b) it is respectively as follows:
Calculate the value of preference function:
It calculates preference index Π (a, b):
The Π (a, b) of any two scheme is calculated, calculates flow into accordingly, outflow and net flow index；
Outflow:
It flows into:
Net flow:
Φ (a)=Φ+(a)-Φ-(a)=(_ (a), g (a))；
Wherein, _ (a) represents scheme and agrees with being worth, and g (a) indicates the opposition value of scheme；
The preferential index S (a) of numerical procedure:
S (a)=_ (a)-g (a)；
The transmission function of soil body compactness inductor are as follows:
Wherein, ω0For the centre frequency of filter, for different ω0, k makes k/ ω0It remains unchanged；
In frequency domain construction filter, corresponding polar coordinates expression way are as follows:
G (r, θ)=G (r, r) G (θ, θ)；
In formula, GrIt (r) is the radial component of control filter bandwidht, Gθ(θ) is the angle component for controlling filter direction；
R indicates that radial coordinate, θ indicate angle coordinate, f0For center frequency, θ0For filter direction, σfFor determining bandwidth；
σθDetermine angular bandwidth,
After computer carries out processing analysis to the signal of transmission, the relationship of strong rammer energy level and collapsibility and soil body compactness is obtained
In, it is handled by signal of the integrated processing module to collapsibility inductor, the transmission of soil body compactness inductor, it is specific to wrap
It includes:
Step 1: determining analysis object and expert's collection: X is the entire objects collection investigated, and is denoted as X={ x1,x2,...xNIt is to participate in
Determine that the expert of index weights integrates as P={ p1,p2...pL}；
Step 2: being the sequence of each index using set value iterative method: weight is { λ1,λ2,...λL, according to important journey in index set
Degree is ranked up index, and the index ordered set that k (1≤k≤L) chooses is Xk=(x3,x5,x1,xN...,xN-1), x in formula3Position
In XkFirst position, i.e., expression x3Think most important in k, according to each index in XkIn position assign index respectively and obtain
Point, in XkMiddle x3It is corresponding to be scored at N, x5It is corresponding to be scored at N-1, xN-1It is corresponding to be scored at 1；
μi,k(1≤i≤N, 1≤k≤L) is index i score obtained at k, is enabledAs comprehensive score, formula
In 1≤i≤N, according to giIt is descending analysis indexes are carried out with new sequence,
Step 3: being compared acquisition comparator matrix to adjacent analysis index respectively；
By comparing the significance level of the relatively latter index of previous index in adjacent index, analystal section, interval endpoint value are provided
Take adjacent rkNumerical value, relative importance are between two r of the twokBetween the corresponding significance level of numerical value；
Step 4: converting point value by following formula for section:
In formula, rij' it is expert i to the lower bound in the analysis matrix of index j, r "ijFor the upper bound in analysis matrix, j=1,2 ...,
n-1；
Step 5: determining the weight of analysis indexes: it is compared since N number of index is adjacent, obtains N-1 fiducial value:
In formula: r1Significance level of the meaning represented as first index after rearrangement relative to second index, with first
The ratio between the absolutely essential degree of a index and second indexIt illustrates,
Comprehensive weight are as follows:
The weight of other indexs are as follows:
Obtain the relationship of strong rammer energy level and collapsibility and soil body compactness.
8. a kind of computer program for realizing collapsibility described in claim 6~7 any one and soil body compactness analysis method.
9. at a kind of information data for realizing collapsibility described in claim 6~7 any one and soil body compactness analysis method
Manage terminal.
10. a kind of computer readable storage medium, including instruction, when run on a computer, so that computer executes such as
Collapsibility described in claim 6-7 any one and soil body compactness analysis method.
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2018
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| GB2451245A (en) * | 2007-07-24 | 2009-01-28 | Roxbury Patents Ltd | Ground improvement |
| CN105046574A (en) * | 2015-04-29 | 2015-11-11 | 国家电网公司 | Black-start scheme evaluation method |
| CN107274297A (en) * | 2017-06-14 | 2017-10-20 | 贵州中北斗科技有限公司 | A kind of soil crop-planting suitability assessment method |
| CN108252291A (en) * | 2017-12-23 | 2018-07-06 | 山西机械化建设集团公司 | The construction method of the coastal backfill super thick foundation of gravelly soil of 25000KN.m heavy tamping treatments |
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