CN105442523A - Combined consolidation method used for silt soft foundation treatment - Google Patents
Combined consolidation method used for silt soft foundation treatment Download PDFInfo
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- CN105442523A CN105442523A CN201510769732.1A CN201510769732A CN105442523A CN 105442523 A CN105442523 A CN 105442523A CN 201510769732 A CN201510769732 A CN 201510769732A CN 105442523 A CN105442523 A CN 105442523A
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- China
- Prior art keywords
- consolidation
- silt
- soft foundation
- cartridge bag
- mud
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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
- E02D3/10—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains
Abstract
The invention provides a combined consolidation method used for silt soft foundation treatment. On the basis of vacuum combined with surcharge preloading, blasting vibration loads are increased, and a static loaded and consolidated soil framework is broken, so that the interstitial hydraulic pressure is increased. A silt framework is broken, a sealed drainage channel is opened, and the permeability coefficient of drainage is increased. Static loading and dynamic loading are combined, draining and consolidating are accelerated, and the project quality is improved. Consumption of electric power, labor and other resources are saved, and environmental protection and energy conservation are achieved. Consolidating of the surface layer of reclaimed silt is conducted through the method, flow operation can be achieved, the working efficiency is greatly improved, and the construction cost is reduced. The vacuum preloading method and the blasting vibration method are especially utilized for consolidating newly reclaimed surface floating silt, and by means of the success of the technology, a traditional construction technology through traditional reclaimed silt consolidation by vacuum preloading in port construction will be greatly changed.
Description
Technical field
The present invention relates to a kind of soft foundation processing technology, particularly a kind of associating consolidation method for Silty soft foundation.
Background technology
During port works is built, one of key technology is that sludge treatment and mud utilize, and is one of the major influence factors of workmanship, duration and cost.The sludge granules in Lianyun Harbour is thin, water content is high, and mechanics index of physics is poor, in port construction, must process mud, is excavated by mud or use as ground after discharging consolidation.Conventional mud reinforcing technique and technique have:
Jackstone is replaced: adopt mechanical dredging that mud is excavated rear jackstone, form throwing ground, or adopt explosive replacement patented technology, replaced by mud, form the stability fundamental of building.Advantage is: bearing capacity of foundation soil is high, and sedimentation is little.Shortcoming is: need a large amount of throwing building stones, cause the waste of natural resource; The mud that machinery is excavated and the mud that explosive replacement is extruded cause rehandling and pollution; Fully effectively can not utilize silt resources.
Vacuum preloading: recently, the multiplex technique of soft soil foundation treatment of the silt soft foundation in port works is reinforced, and advantage is: the Dam Foundation Strengthened in Situ realizing mud, can reinforce blowing-filling sludge and original state mud, achieve the twice laid of mud.But the water content of new hydraulically filled sludge is very high, and top layer reaches 300%.After hydraulic reclamation terminates, need draining, airing, deadweight consolidation, general needs 4 months, extend the duration of a project; Before starting deep vacuum prepressing reinforcement soft base, the woven cloth needing to lay large scale increasing globality, lay two-layer bamboo fragrant plant, to lay 1 meter of thick mountain skin native.
Piling prepressing: adopt the way of overload to carry out the discharging consolidation of mud, advantage is: strengthen heap carrying capacity and extend the ballast time, can reach higher mud intensity.Shortcoming is: the same with vacuum preloading, and need a large amount of airing time and ancillary works measure, cost is high.
Mud stirs: the Site adopting cement, lime or other new additives to carry out mud is reinforced, and absorbs the moisture in mud, and produces chemical reaction, and mud is hardening, forms the rigid skeleton of adulterating agent and mud.Advantage is: silt consolidation is fast, and the intensity of 3 months is substantially close to maximum value.Shortcoming is: Admixture addition content is large, costly, is only applied to the keypoint part of engineering; Workmanship not easily ensures, this technique has been cancelled in a lot of area.For the pole muskey poor effect of high-moisture.
The treatment of blowing-filling sludge is the difficult point of engineering always: after mud hydraulic reclamation terminates, and top layer is gruel shape, water content 150 ~ 300%, and comply with from reprecipitation, speed is very slow.Surface, hydraulic reclamation district is pan bottom shape, middle low, and precipitation shipwreck is to discharge.Conventional way is: precipitation, airing 4 months, after laying woven cloth, bamboo fragrant plant, with mountain skin soil as working cushion layer, not only substantially increases construction costs, also brings very large construction risk.
Summary of the invention
The technical problem to be solved in the present invention is for the deficiencies in the prior art, propose a kind of discharging consolidation speed fast, thoroughly, the associating consolidation method for Silty soft foundation of energy-saving and environmental protection.
The technical problem to be solved in the present invention is achieved through the following technical solutions, a kind of associating consolidation method for Silty soft foundation, be characterized in: on the basis of combined vacuum and surcharge preloading, by concussion of blasting load, break mud skeleton, increase interstitial hydraulic pressure, accelerate drainage speed, make its consolidation again, reach higher fastening strength.
The technical problem to be solved in the present invention can also be come to realize further by the following technical programs, and described concussion of blasting load is at combined vacuum and surcharge preloading after 60 days, and sludge granules generating portion consolidation, carries out after drainage speed obviously reduces.
The technical problem to be solved in the present invention can also be come to realize further by the following technical programs, and after detonating for the first time, circulation explosion is carried out in 2 ~ 15 days in interval.。
The technical problem to be solved in the present invention can also be come to realize further by the following technical programs, concussion of blasting load is the pre-buried detonation mode of cartridge bag, single cartridge bag is adopted to detonate or multiple cartridge bag volley, cartridge bag dose is 0.5 ~ 10 kilogram, cartridge bag buried depth 2 ~ 10 meters, mud must not be flown, charges interval 50 ~ 100 meters when detonating.
The present invention compared with prior art, adopts on the basis of combined vacuum and surcharge preloading, increases concussion of blasting load, breaks the soil body skeleton after static load consolidation, interstitial hydraulic pressure is improved; Break mud skeleton, opened the drainage channel closed, added the transmission coefficient of draining.Static load, dynamic load combine, and accelerate discharging consolidation, improve workmanship.
Its advantage and technique effect are:
Save the duration: in Wharf Construction, can complete soon after cofferdam is formed and blow bricklayer's's work, but reinforcing soft foundation then needs the time more than a year, reinforcing soft foundation becomes the critical circuits of port works, and has dominated total lever factor.
The twice laid of mud: after adopting this technology, can increase blowing-filling sludge, to use as working cushion layer after reinforcing.Therefore the sludge waste dredged in harbour basin and navigation channel can more be utilized.
Detonation shock is reinforced: although sludge granules is very thin, also belong to a prose style free from parallelism, and under vibrations load action, a full water prose style free from parallelism will be liquefied.Mud after consolidation liquefies again, is again opened by the drainage channel making to close, and improves transmission coefficient and discharge pressure gradient, accelerates drainage speed, improves consolidation rate and engineering effort.
Environmental protection and energy-conservation: after adopting this technology, can make full use of sea leave, reduces utilization and the exploitation of natural stone resource.Accelerate project speed, improve workmanship, greatly save the consumption of electric power and the resource such as artificial, accomplish environmental protection and energy-conservation.
The top layer adopting this law to carry out blowing-filling sludge reinforces, and can accomplish continuous productive process, greatly improve work efficiency, reduces cost.Particularly utilize vacuum method and detonation shock method to reinforce the floating silt in surface of new hydraulic reclamation, the success of this technology, will change the traditional construction technique of blowing-filling sludge vacuum pre-press reinforcing traditional in port construction greatly.
Detailed description of the invention
For an associating consolidation method for Silty soft foundation, on the basis of combined vacuum and surcharge preloading, by concussion of blasting load, break mud skeleton, increase interstitial hydraulic pressure, accelerate drainage speed, make its consolidation again, reach higher fastening strength.
Described concussion of blasting load is at combined vacuum and surcharge preloading after 60 days, and sludge granules generating portion consolidation, carries out after drainage speed obviously reduces.
After detonating for the first time, circulation explosion can be carried out after 2 ~ 15 days in interval.Repeatedly after explosion until reach the fastening strength of setting.
Concussion of blasting load is the pre-buried detonation mode of cartridge bag, and adopt single cartridge bag to detonate or multiple cartridge bag volley, cartridge bag dose is 0.5 ~ 10 kilogram, and cartridge bag buried depth 2 ~ 10 meters, must not fly mud when detonating, charges interval 50 ~ 100 meters.
Below further describe concrete technical scheme of the present invention, so that those skilled in the art understands the present invention further, but do not form the restriction to its right.
Embodiment 1, a kind of associating consolidation method for Silty soft foundation, its scheme and step as follows:
(1) parameter: gunpowder dose 2 kilograms, buried depth 5 meters, single cartridge bag of fixing a point detonates.
(2)--gunpowder is marched into the arena, and--waterproof gunpowder cartridge bag makes, and--cartridge bag is buried underground, and--warning is detonated, vibration monitoring, and--observation of water yield, settling rate, comparative analysis--explosion is repeated in 2 ~ 10 days in interval--detect after work implementation step: combined vacuum and surcharge preloading 60 days.
(3) effect: detonation shock influence basin is more than 150 meters, and draining, settlement influence scope 80 meters, moment, maximum drainage speed improved more than 10 times, and the settling rate of 2 days improves more than 1 times.
Embodiment 2, a kind of associating consolidation method for Silty soft foundation, its scheme and step as follows:
(1) parameter: gunpowder dose 5 kilograms, buried depth 8 meters, lay group's cartridge bag along press mold ditch, charges interval 100 meters, cartridge bag detonates one by one.
(2)--gunpowder is marched into the arena, and--waterproof gunpowder cartridge bag makes, and--cartridge bag is buried underground, and--warning is detonated, vibration monitoring, and--observation of water yield, settling rate, comparative analysis--explosion is repeated in 10 days in interval--detect after work implementation step: combined vacuum and surcharge preloading 80 days.
(3) effect: detonation shock influence basin is more than 150 meters, and draining, settlement influence scope 100 meters, moment, maximum drainage speed improved more than 10 times, and the settling rate of 2 days improves more than 1 times.
Embodiment 3, a kind of associating consolidation method for Silty soft foundation, its scheme and step as follows:
(1) parameter: gunpowder dose 5 kilograms, buried depth 10 meters, lay group's cartridge bag along press mold ditch, charges interval 100 meters, cartridge bag detonates one by one.
(2)--gunpowder is marched into the arena, and--waterproof gunpowder cartridge bag makes, and--cartridge bag is buried underground, and--warning is detonated, vibration monitoring, and--observation of water yield, settling rate, comparative analysis--explosion is repeated in 5 days in interval--detect after work implementation step: combined vacuum and surcharge preloading 60 days.
(3) effect: detonation shock influence basin is more than 150 meters, and draining, settlement influence scope 80 meters, moment, maximum drainage speed improved more than 10 times, and the settling rate of 2 days improves more than 1 times.
Claims (4)
1. for an associating consolidation method for Silty soft foundation, it is characterized in that: on the basis of combined vacuum and surcharge preloading, by concussion of blasting load, break mud skeleton, increase interstitial hydraulic pressure, accelerate drainage speed, make its consolidation again, reach higher fastening strength.
2. the associating consolidation method for Silty soft foundation according to claim 1, it is characterized in that: described concussion of blasting load is at combined vacuum and surcharge preloading after 60 days, sludge granules generating portion consolidation, carries out after drainage speed obviously reduces.
3. the associating consolidation method for Silty soft foundation according to claim 1 and 2, is characterized in that: after detonating for the first time, and circulation explosion is carried out in 2 ~ 15 days in interval.
4. the associating consolidation method for Silty soft foundation according to claim 1, it is characterized in that: concussion of blasting load is the pre-buried detonation mode of cartridge bag, single cartridge bag is adopted to detonate or multiple cartridge bag volley, cartridge bag dose is 0.5 ~ 10 kilogram, cartridge bag buried depth 2 ~ 10 meters, mud must not be flown, charges interval 50 ~ 100 meters when detonating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510769732.1A CN105442523A (en) | 2015-11-12 | 2015-11-12 | Combined consolidation method used for silt soft foundation treatment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510769732.1A CN105442523A (en) | 2015-11-12 | 2015-11-12 | Combined consolidation method used for silt soft foundation treatment |
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| CN105442523A true CN105442523A (en) | 2016-03-30 |
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| CN201510769732.1A Pending CN105442523A (en) | 2015-11-12 | 2015-11-12 | Combined consolidation method used for silt soft foundation treatment |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1683718A (en) * | 2004-08-05 | 2005-10-19 | 铁道科学研究院 | Draining and reinforcing treating method for soft soil foundation |
| CN101319497A (en) * | 2007-06-06 | 2008-12-10 | 北京中科力爆炸技术工程有限公司 | Method for consolidating mud soft base by explosion and piling prepressing united drainage |
| US20100061806A1 (en) * | 2006-12-01 | 2010-03-11 | Shilong XU | Information method combined with dynamic consolidation and vacuum drainage for reinforcement of soft soil ground |
| CN103806432A (en) * | 2014-01-25 | 2014-05-21 | 西安科技大学 | Method for treating foundations in slope filling and digging joint part of wet and soft zone in loess region |
-
2015
- 2015-11-12 CN CN201510769732.1A patent/CN105442523A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1683718A (en) * | 2004-08-05 | 2005-10-19 | 铁道科学研究院 | Draining and reinforcing treating method for soft soil foundation |
| US20100061806A1 (en) * | 2006-12-01 | 2010-03-11 | Shilong XU | Information method combined with dynamic consolidation and vacuum drainage for reinforcement of soft soil ground |
| CN101319497A (en) * | 2007-06-06 | 2008-12-10 | 北京中科力爆炸技术工程有限公司 | Method for consolidating mud soft base by explosion and piling prepressing united drainage |
| CN103806432A (en) * | 2014-01-25 | 2014-05-21 | 西安科技大学 | Method for treating foundations in slope filling and digging joint part of wet and soft zone in loess region |
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Application publication date: 20160330 |
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