CN101787690A - Operating method for reinforcing liquefied foundation with resonance method - Google Patents
Operating method for reinforcing liquefied foundation with resonance method Download PDFInfo
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- CN101787690A CN101787690A CN 201010119970 CN201010119970A CN101787690A CN 101787690 A CN101787690 A CN 101787690A CN 201010119970 CN201010119970 CN 201010119970 CN 201010119970 A CN201010119970 A CN 201010119970A CN 101787690 A CN101787690 A CN 101787690A
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Abstract
The invention relates to an operating method for reinforcing liquefied foundation with a resonance method, which adopts a resonance compaction method to treat liquefied foundation, i.e. a crossed flapping wing is sunk by adopting a vibrator, and the resonance of earth-vibration wings in certain frequency is realized through adjusting the vibration frequency of the vibrator; under the state, the vibration wing obtains the optimal vibration energy to transmit the energy to the surrounding earth layers; and after pore water dissipates, the compaction effect of earth bodies is improved, thereby improving the anti-liquefaction of the earth bodies. The resonance compaction method employs a vibration hammer and the crossed vibration wing devices and achieves the purpose of treating liquefied foundation of sand soil, powder soil and the like through the resonance of earth body-vibration wing under certain frequency. The application of the treatment method is based on the design technology of fitting the actual circumstances and has applicable geological conditions; and two-stage construction is highly efficient on the basis of reasonably selecting the vibration hammer and the vibration wing.
Description
Technical field
The present invention is a kind of method that liquefied foundation is handled that is used for, selected operation format when relating to the working power densification process and handling liquefied foundation such as sand, silt.The technical field that belongs to method for processing foundation.
Background technology
China's Yangze river and Huai river river valley liquefied foundation that often distributes, under dynamic load functions such as earthquake, circulation, vehicle, foundation liquefaction is the principal mode of foundation failure, often causes the quality problems of speedway.Using maximum methods in the whole bag of tricks of process liquefaction ground is to increase soil body compactness.Selected processing method will influence the closely knit effect of power during liquefaction is handled.Best closely knit effect should be able to realize the optimum transmission of vibrational energy.
Summary of the invention
Technical problem: the deficiency at existing liquefied foundation processing method the purpose of this invention is to provide a kind of method of operating that can improve the reinforcing liquefied foundation with resonance of effect of soil resonance compacting construction.
Technical scheme: the present invention adopts the closely knit method of resonance to carry out the processing of liquefied foundation, promptly adopt vibrator to sink to cross-shaped vibration wing, realize that by regulating the vibrator vibration frequency soil-oscillating airfoil is in a certain frequency realization resonance, under this state, oscillating airfoil obtains the optimal vibration energy to the transmission of soil layer on every side, after pore water dissipates, the closely knit effect of the soil body is improved, the anti-liquefaction performance of the improvement soil body.
The closely knit method of described resonance is carried out the processing of liquefied foundation, adopts two stages to construct, the phase I adopt according to foundation soil shake suitable construction spacing of frequency selection purposes certainly, second stage is encrypted construction on the basis of phase I construction.The vibrator vibration frequency is adjusted according to the soil types difference, that is: when being used for hard clay soil layer, the high-frequency of employing is 100-150HZ; When being used for loose shock ply, the medium frequency of employing is 20-60HZ; When being used for sandy soil, the low frequency of employing is 15-20HZ.
Beneficial effect: compare with existing power foundation treatment technology, facility of the present invention have following advantage: the present invention can satisfy the needs of different reinforcement depths; Save processing cost, present technique is handled liquefied foundation in position, need not filler; The efficiency of construction height during construction, only needs heavy oscillating airfoil to get final product, and carries out vibratory compaction when extracting; The closely knit effect of superficial part soil layer is strengthened, because vibration is the internal vibration of whole oscillating airfoil length range, the soil layer of superficial part is subjected to the historical influence of more vibration, and its intensity must improve, when meeting load and bearing mainly is the fact that influenced by the superficial part bearing stratum, can obviously reduce the ground differential settlement.The oscillating airfoil of appropriate design, the pore water pressure that helps producing in the transmission of vibrational energy and the vibratory compaction process dissipates.The resonance of oscillating airfoil under a certain frequency and soil can improve the anti-liquefaction performance of the soil body rapidly, makes it satisfy the requirement of engineering construction.
The specific embodiment
Key of the present invention is to realize resonance by regulating vibrator vibration frequency realization soil-oscillating airfoil system in a certain frequency that under this state, oscillating airfoil obtains the optimal vibration energy to the transmission of soil layer on every side, and the closely knit effect of the soil body is improved, and improves its anti-liquefaction performance.
This oscillating airfoil is connected under the hydraulic vibration driver, utilizes the vibrator sunk pile leading truck to construct.Selected hydraulic vibration driver be with hydraulic pressure as power, lift hammer body quick draining then, reverse fuel feeding descends hammer body fast simultaneously, the hammering pile cover sinks in the soil oscillating airfoil.Hydraulic vibration driver can be without restriction carries out the pile sinking operation to the steel sheet pile of different shape.In the selection of pile monkey, the minimum exciting force of guaranteeing vibrating hammer is greater than the moving frictional resistance of soil under vibrational state.During pile vibrosinking, enough amplitudes must be arranged, make the instantaneous whole elastic pressures of vibration force, and make the destructive power of stake end, can make stake impact soil shrinkage up and down greater than foundation soil greater than pile peripheral earth.The exciting force of vibrohammer is relevant with frequency, and frequency is high more, and exciting force is big more.Square being directly proportional of exciting force and frequency.High-frequency (100-150HZ) is applicable to hard clay soil layer, and intermediate frequency (20-60HZ) is used for loose shock ply and sand pile sinking, low frequency (15-20HZ), the main purpose that reaches pile sinking and pile pulling by forced vibration and soil resonance.The key of using the frequency modulation hydraulic vibration driver to carry out the closely knit construction of the soil body is to make shot soil body vibratory compaction certain hour extract oscillating airfoil then to resonance frequency frequency adjustment when arriving the handled degree of depth, reach the closely knit effect of the soil body and improve, the purpose of anti-liquefaction performance improvement.
Closely knit method geological conditions resonates: this method is applicable to the sand that is easy to liquefy.Must determine by field trial when being used for other geological conditions.
When designing this method, the mode of operation of shake close time, the vibrating arm of the spacing of closely knit point, each closely knit point (shake into, hang and extract) three parameters are very important to closely knit design.During design, must consider that simultaneously the initial density of soil, the degree of depth of handling soil layer or soil layer require influence factors such as compaction rate.The mesh spacing that closely knit method is handled is 1.5-4.5 rice normally, and each closely knit some vibration duration is 5-35 minute kind.Less closely knit dot spacing can reduce the alternate frequency of vibratory compaction process, makes soil layer more closely knit evenly.
In the work progress, the closely knit method principal element of influence resonance is the vibratory compaction order.High-efficiency method is to adopt for two stages closely knit, at first carries out on bigger mesh spacing, be implemented in vertically shake on the bigger spacing into.Before first staged construction end and second stage construction, to leave soil layer for enough pore water resolution times are arranged.
Claims (3)
1. one kind is used for the method that liquefied foundation is handled, it is characterized in that adopting the closely knit method of resonance to carry out the processing of liquefied foundation, promptly adopt vibrator to sink to cross-shaped vibration wing, realize that by regulating the vibrator vibration frequency soil-oscillating airfoil is in a certain frequency realization resonance, under this state, oscillating airfoil obtains the optimal vibration energy to the transmission of soil layer on every side, after pore water dissipates, the closely knit effect of the soil body is improved, the anti-liquefaction performance of the improvement soil body.
2. the method that is used for the liquefied foundation processing according to claim 1, it is characterized in that the closely knit method of described resonance carries out the processing of liquefied foundation, adopt two stages to construct, phase I adopt according to foundation soil shake suitable construction spacing of frequency selection purposes certainly, second stage is encrypted construction on the basis of phase I construction.
3. according to claim 1ly be used for the method that liquefied foundation is handled, it is characterized in that the vibrator vibration frequency adjusts according to the soil types difference, that is: when being used for hard clay soil layer, the high-frequency of employing is 100-150HZ; When being used for loose shock ply, the medium frequency of employing is 20-60HZ; When being used for sandy soil, the low frequency of employing is 15-20HZ.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010119970 CN101787690A (en) | 2010-03-08 | 2010-03-08 | Operating method for reinforcing liquefied foundation with resonance method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010119970 CN101787690A (en) | 2010-03-08 | 2010-03-08 | Operating method for reinforcing liquefied foundation with resonance method |
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| CN101787690A true CN101787690A (en) | 2010-07-28 |
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| CN 201010119970 Pending CN101787690A (en) | 2010-03-08 | 2010-03-08 | Operating method for reinforcing liquefied foundation with resonance method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102312439A (en) * | 2011-07-07 | 2012-01-11 | 建研地基基础工程有限责任公司 | Device for treating liquefied foundation by using vibrating hammer pipe and treatment method thereof |
| CN104358247A (en) * | 2014-11-13 | 2015-02-18 | 中国水电基础局有限公司 | Method and device for electric vibroflotation for vibroflotation gravel pile machine |
| CN104790373A (en) * | 2015-05-06 | 2015-07-22 | 中化岩土工程股份有限公司 | Tube sinking and excitation compacting method |
| CN105064372A (en) * | 2015-08-04 | 2015-11-18 | 中交二航局第四工程有限公司 | Foundation pit backfill sand vibration compaction method |
| CN107942033A (en) * | 2017-11-01 | 2018-04-20 | 东南大学 | The reinforcing liquefied soil model experimental rig of resonance method and test method |
| CN108049416A (en) * | 2017-11-28 | 2018-05-18 | 中铁四局集团第四工程有限公司 | A kind of construction method of underground pipe gallery foundation pit Cast-in-situ Piles in Sand-filling compacting |
| WO2020244123A1 (en) * | 2019-06-04 | 2020-12-10 | 东南大学 | Method for treating collapsible loess foundation with vibration rod compaction |
| CN113235550A (en) * | 2021-04-14 | 2021-08-10 | 东南大学 | Reinforcement construction method of miscellaneous fill foundation |
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| DE19628769C2 (en) * | 1996-07-17 | 1998-06-10 | Bul Sachsen Gmbh | Method and device for deep compaction of binding and non-binding compaction material |
| CN2786200Y (en) * | 2005-04-13 | 2006-06-07 | 国家电力公司华东勘测设计研究院 | Multi-head aerating and vibro-impacting device |
| CN101024952A (en) * | 2007-03-14 | 2007-08-29 | 东南大学 | Cross-shaped vibration wing |
| CN201024415Y (en) * | 2007-03-14 | 2008-02-20 | 东南大学 | Vibrated wing for liquefied ground treatment |
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2010
- 2010-03-08 CN CN 201010119970 patent/CN101787690A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19628769C2 (en) * | 1996-07-17 | 1998-06-10 | Bul Sachsen Gmbh | Method and device for deep compaction of binding and non-binding compaction material |
| CN2786200Y (en) * | 2005-04-13 | 2006-06-07 | 国家电力公司华东勘测设计研究院 | Multi-head aerating and vibro-impacting device |
| CN101024952A (en) * | 2007-03-14 | 2007-08-29 | 东南大学 | Cross-shaped vibration wing |
| CN201024415Y (en) * | 2007-03-14 | 2008-02-20 | 东南大学 | Vibrated wing for liquefied ground treatment |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102312439A (en) * | 2011-07-07 | 2012-01-11 | 建研地基基础工程有限责任公司 | Device for treating liquefied foundation by using vibrating hammer pipe and treatment method thereof |
| CN104358247A (en) * | 2014-11-13 | 2015-02-18 | 中国水电基础局有限公司 | Method and device for electric vibroflotation for vibroflotation gravel pile machine |
| CN104790373A (en) * | 2015-05-06 | 2015-07-22 | 中化岩土工程股份有限公司 | Tube sinking and excitation compacting method |
| CN104790373B (en) * | 2015-05-06 | 2017-07-28 | 中化岩土集团股份有限公司 | The closely knit method of immersed tube exciting |
| CN105064372A (en) * | 2015-08-04 | 2015-11-18 | 中交二航局第四工程有限公司 | Foundation pit backfill sand vibration compaction method |
| CN105064372B (en) * | 2015-08-04 | 2017-06-23 | 中交二航局第四工程有限公司 | A kind of foundation ditch Cast-in-situ Piles in Sand-filling shakes densification process |
| CN107942033A (en) * | 2017-11-01 | 2018-04-20 | 东南大学 | The reinforcing liquefied soil model experimental rig of resonance method and test method |
| CN108049416A (en) * | 2017-11-28 | 2018-05-18 | 中铁四局集团第四工程有限公司 | A kind of construction method of underground pipe gallery foundation pit Cast-in-situ Piles in Sand-filling compacting |
| WO2020244123A1 (en) * | 2019-06-04 | 2020-12-10 | 东南大学 | Method for treating collapsible loess foundation with vibration rod compaction |
| CN113235550A (en) * | 2021-04-14 | 2021-08-10 | 东南大学 | Reinforcement construction method of miscellaneous fill foundation |
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Open date: 20100728 |