CN104818707A - Method for solidifying and curing dredger sludge and new dredger fill by applying cotton stalks - Google Patents
Method for solidifying and curing dredger sludge and new dredger fill by applying cotton stalks Download PDFInfo
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- CN104818707A CN104818707A CN201510182777.9A CN201510182777A CN104818707A CN 104818707 A CN104818707 A CN 104818707A CN 201510182777 A CN201510182777 A CN 201510182777A CN 104818707 A CN104818707 A CN 104818707A
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Abstract
The invention relates to a method for solidifying and curing dredger sludge and new dredger fill by applying cotton stalks. The method performs the following steps: the cotton stalks are produced to cotton stalk bundles, are combined to form a cotton stalk cylinder, and are inserted in sludge or new dredger fill to be treated to serve as vertical drain bodies; after transverse drain bodies are laid on the surface of the sludge or new dredger fill to be treated, a layer of sealing film is covered and connected with a vacuum device, and the vacuum device is used to perform the vacuum prepressing solidification for the sludge; and after the vacuum prepressing solidification, a curing agent and a retarding agent are filled in the cotton stalk cylinder to enable the cotton stalk cylinder to become the cotton stalks for solidifying the sludge or the new dredger fill so as to finish the solidification or curing of the dredger sludge or the new dredger fill. The method can combine two functions of the early vacuum prepressing drain solidification and the later grouting curing as a whole, and uses the environment-friendly curing agent, so that the construction cost can be reduced, the construction efficiency can be improved, and the construction period is largely shortened.
Description
Technical field
The present invention relates to a kind of method applying cotton stalk consolidation and solidification dredging silt, newly barged-in fill, belong to water conservancy, waterway engineering technical field.
Background technology
Along with the quick propelling of coastal great development, enclose extra large reclamation by pumping filling and become coastal area solution land resources important channel in short supply, enclose extra large reclamation by pumping filling on a large scale to rise one after another, the areas such as Lianyun Harbour, Yancheng, Tianjin, Wenzhou, Xiamen, Nansha Area, Guangzhou port and Shenzhen, the reclamation by pumping filling region of millions of square kilometres has been listed in development plan.
Recently barged-in fill mostly is mud scum ~ stream pureed ultra-soft soil, and bearing capacity is almost 0, and personnel and plant equipment cannot be marched into the arena.In the face of super soft ground like this, the normal method adopting deep level of processing again after shallow layer reinforcement.Shallow layer reinforcement often adopts natural drying method, chemical curing method, vacuum method etc., and later stage deep level of processing often adopts piling or deep mixing method.
In these reinforcement means, natural drying method needs to find large-area airing place, face place requisition and earthwork transportation problem back and forth, and ted by weather effect large, consuming time longer, need 1 ~ 2 year, even the longer time, and the thickness forming crust layer is little, the plant equipment load of sleeping weak soil under being difficult to bracing reinforcement.Chemical curing method cost is high (about needs 200 yuan/m
2), and cement solidification material can cause Heavy environmental pollution.Although vacuum method cost is low, convenient construction, reinforce in work at barged-in fill and be used widely, but along with highway construction, port construction, the various engineering construction such as to reclaim fields from the sea increasing, sand resource becomes narrow resources day by day, and the use of its horizontal sand cushion and vertical sand drain must cause the increase of vacuum method cost.In addition, want to obtain more high-bearing capacity, after vacuum preloading is disposed, also need to carry out deep level of processing again, such as deep mixing method or piling, the manpower and materials consumed are larger.
On the other hand, agricultural crop straw is one of main discarded object in agricultural production, the stalk produced in the annual agricultural production in the current whole world is 1,000 hundred million ~ 2,000 hundred million tons, China has nearly 600,000,000 tons of stalks every year, and be utilized less than 2,000 ten thousand tons, the stalk of about 97% is burned, pile sum abandons, and this causes great destruction to environment.
Stalk draining, in existing application in recent years, such as, adopts the dirt mixing Wheat Straw to make easy drain tank for highway subgrade draining; To carry out antiseptic stalk section to put into non-woven bag and carry out in a down-to-earth manner, and it is medium that this is used for agricultural drain as water discharging body.
Stalk reinforcement is also having application in recent years.Such as, Wheat Straw is applied to reinforcement cohesive soil and sand; Rice straw is applied to Kuttanad clay and reinforces improvement; Reinforcement material solidifying beach salty soil is made with the Wheat Straw after preservative treatment.But existing correlation theory research mostly is qualitative achievement, and mostly existing theoretical result is also other geosynthetics such as artificial fiber, geo-grid, geotextile etc.
Up to the present, utilize stalk self muscle material characteristic be in the milk the solidification theoretical research of pile and engineer applied achievement little, but also there is a small amount of useful achievement report, such as the tiny Wheat Straw of chopping be applied to reinforced cemented-soil agitation pile; Cotton stalk powder and precipitated calcium carbonate, swell soil, silicon ash etc. are mixed, rice straw powder and pulverized limestone, quartz sand, flyash, autumn roll into a ball native etc. to mix, stalk, gangue carbonized fine particle and cement or lime and marine glue etc. be mixed and made into body of wall etc.But these methods generally all use non-environment friendly curing agent (as cement etc.), but not the production of environment friendly curing agent and use all can cause huge destruction to environment.
Summary of the invention
The present invention wants technical solution problem to be: for the mud after vacuum preconsolidation process or the lower shortcoming of new barged-in fill intensity, a kind of method applying cotton stalk consolidation and solidification dredging silt, newly barged-in fill is provided, the vacuum preloading discharging consolidation in early stage and the grouting in later stage can be made to solidify two kinds of functions unite two into one, the method is energy-conserving and environment-protective not only, and can construction cost be reduced and improve its efficiency of construction, significantly shorten construction period.
In order to solve the problems of the technologies described above, the technical scheme that the present invention proposes is: a kind of method applied cotton stalk and be cured dredging silt, new barged-in fill, and order performs following steps:
1) cotton stalk is made cotton stalk bundle, bottom surface and the end face relevant position of described cotton stalk bundle are shaped with corresponding projection and pit respectively;
2) coordinate location to form cotton stalk cylinder by projection and pit multiple cotton stalk bundle, one deck geotextiles is wrapped up in the periphery of described cotton stalk cylinder, be then inserted in pending mud or new barged-in fill as vertical drainage body;
3) after transverse row water body is laid on the surface of pending mud or new barged-in fill, cover one deck diaphragm seal, then diaphragm seal is connected with vacuum extractor, uses this vacuum extractor to carry out the process of vacuum preloading discharging consolidation to mud;
4) after vacuum preconsolidation process, in cotton stalk cylinder, pour into curing compound and retarding agent make it to become the cotton stalk stake of reinforcing mud or new barged-in fill, thus complete the solidification to dredging silt or new barged-in fill.
The preferred desulfurated plaster of described curing compound and slag.The mixed serum of the preferred mud of described retarding agent and lime, NaOH and/or composite exciting agent CSN.
Described cotton stalk can select field directly to gather in the cotton stalk of rear removal root, and the diameter of described cotton stalk bundle is 300 ~ 600mm.
Solidification described in the present invention and consolidation are all common technology terms of this area, usual solidification points in mud to add the curing materials such as cement, lime, by curing materials and soil particle etc., chemical reaction occurs, produce the cementitious materialss such as calcium carbonate, by cementing, reach processing intent; And consolidation refers to that, by applying external force to the soil body, as loading, negative pressure of vacuum etc., by soil body densification, water is extruded, and reaches reinforcing object.The former belongs to chemical treatment method, and the latter belongs to physical treatment method.
The cotton stalk that the present invention directly selects field directly to gather in rear removal root makes cotton stalk cylinder, and wrapped up one deck geotextiles in the periphery of cotton stalk cylinder, such cotton stalk cylinder is when vacuum preconsolidation, the good draining characteristics of some strength rigidity and the natural hollow out himself possessed can be utilized, to the greatest extent good water discharging body function.After vacuum preconsolidation process, in cotton stalk cylinder, pour into the additive such as curing compound and retarding agent, make cotton stalk cylinder form cotton stalk stake, play the effect of deep-layer reinforcing.Therefore, the branches and tendrils that the present invention can make full use of cotton stalk make good muscle material and skeleton, fill with the slurries such as the gypsum after calcining (desulfurated plaster) and slag to prepare pile body, not only erosion resistant, and efficiency of construction and construction cost advantage remarkable.
In sum, the present invention also has following excellent beneficial effect:
(1) the present invention utilizes cotton stalk by dredging silt, new barged-in fill early stage discharging consolidation and the later stage grouting be cured, cotton stalk is made cotton stalk cylinder, early stage is as water discharging body, later stage is as solidification stake, not only greatly can alleviate cotton stalk burning or the air and water pollution caused by papermaking, social benefit is remarkable, and make full use of the excellent drain function of cotton stalk cylinder, and the friendly curing compound with low cost of combining environmental, thus greatly reduce high-moisture percentage mud and barged-in fill tradition sand drain or drainage belt consolidation draining and traditional cements and solidify the construction cost processed, significantly improve its efficiency of construction, economic benefit is huge.
(2) applicant finds through long-term scientific research, cotton stalk is made cotton stalk cylinder and be used as water discharging body in discharging consolidation method, good drainage effect can be reached, and receive a large amount of agricultural product castoff stalk of digestion, discarded renewable cotton stalk resource is applied to the consolidation draining of high-moisture percentage mud or new barged-in fill, thus greatly alleviates cotton stalk burning or the air and water pollution caused by papermaking.
The present invention removes the cotton stalk of root after directly using harvesting, other use in prior art need to carry out the process such as chopping as rice wheat straw etc., cotton stalk of the present invention does not need to carry out secondary operations, can in the vacuum preloading discharging consolidation stage, make full use of the good draining characteristics of some strength rigidity that cotton stalk self possesses and natural hollow out, good water discharging body function to the greatest extent.
(3) the present invention is in cure stage, and the branches and tendrils that can make full use of cotton stalk make good muscle material and skeleton, fills with the slurries such as the gypsum after calcining (desulfurated plaster) to prepare pile body.Reinforce after consolidation completes with prior art to shallow-layer dredging silt, new barged-in fill, when needs are as building lot or roadbed, the dredging silt after to consolidation, newly barged-in fill is needed to carry out deep-layer stirring or piling, the present invention only need pour into curing compound and retarding agent in cotton stalk cylinder, does not need the deep level of processing of carrying out other.
(4) curing compound that the present invention uses adopts desulfurated plaster and slag, namely avirulent desulfurated plaster is used to coordinate slag as curing compound, compared with the solidification pile body made with Wheat Straw, rice straw and producing fibre from cotton stalk, cotton stalk powder mixed cement, curing compound environmental pollution of the present invention can reduce greatly, more friendly to environment.
(5) cotton stalk inherently has good corrosion resistance, therefore in the invention of this reality, cotton stalk rots speed and will well below other kind stalks such as Wheat Straw, rice straw with the rotten level under equal time, and cotton stalk is broken into cotton stalk bundle, further improve its corrosion resistance.Therefore lime slurry is only used to play antisepsis to cotton stalk in the present invention, the use amount of anticorrisive agent will be far smaller than Wheat Straw, rice straw and producing fibre from cotton stalk, cotton stalk powder etc., and construction link has also lacked cotton stalk is processed into the links such as short debris, powder, particle.
The method for optimizing pouring into curing compound and retarding agent in step 4) of the present invention in cotton stalk cylinder is: curing compound and retarding agent are added to the water and make slurries, the center in cotton stalk cylinder of Grouting Pipe being inserted is to bottom, Grouting Pipe is connected with grouting pump, by grouting pump, described slurries are pressed in cotton stalk cylinder again, make to be full of slurries in cotton stalk cylinder.The preferred porous PVC pipe of described Grouting Pipe.
When practical operation, Grouting Pipe can be inserted the center of cotton stalk cylinder to bottom, and Grouting Pipe is extracted on limit while marginal not slurry.In addition, during by grouting pump by described slurries press-in cotton stalk cylinder, mixer is used to be stirred by described slurries.
When the present invention carries out vacuum preloading discharging consolidation in step 3), the preferred Wheat Straw blanket of described transverse row water body and/or rice straw blanket, the thickness of described Wheat Straw blanket is 5cm ~ 20cm.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described.
Fig. 1 is the structural representation of cotton straws bundle in the embodiment of the present invention.
Detailed description of the invention
Embodiment
The application cotton stalk of the present embodiment carries out the method for consolidation to dredging silt, newly barged-in fill, and order performs following steps:
1) cotton stalk is made cotton stalk bundle, bottom surface and the end face relevant position of described cotton stalk bundle are shaped with corresponding projection and pit respectively; In the present embodiment cotton stalk bundle as shown in Figure 1, like this can easily by projection and pit stacked.
The present embodiment can directly select field directly to gather in the cotton stalk of rear removal root, ensure that the diameter of cotton stalk bundle is between 300 ~ 600mm, and it is all basically identical to make the cotton stalk made tie shape size.
2) coordinate location to form cotton stalk cylinder by projection and pit multiple cotton stalk bundle, one deck geotextiles is wrapped up in the periphery of described cotton stalk cylinder, be then inserted in pending mud or new barged-in fill as vertical drainage body.Geotextiles is wrapped on cotton stalk cylinder like this, can prevents the blocks such as the rubble in mud or new barged-in fill from entering in cotton stalk cylinder.
3) after transverse row water body is laid on the surface of pending mud or new barged-in fill, cover one deck diaphragm seal, then diaphragm seal is connected with vacuum extractor, uses this vacuum extractor to carry out the process of vacuum preloading discharging consolidation to mud.
The preferred Wheat Straw blanket of transverse row water body in the present embodiment, the thickness of described Wheat Straw blanket is 5cm ~ 20cm.Certain transverse row water body also can adopt other forms, such as traditional sand cushion or rice straw blanket etc.
4) after vacuum preconsolidation process, in cotton stalk cylinder, pour into curing compound and retarding agent make it to become the cotton stalk stake of reinforcing mud or new barged-in fill, thus complete the solidification to dredging silt or new barged-in fill.
Described in the present embodiment, desulfurated plaster selected by curing compound, can certainly select slag, or the mixture of slag and desulfurated plaster.
The mixed serum of the preferred mud of retarding agent described in the present embodiment and lime, NaOH and/or composite exciting agent CSN.
Cotton stalk described in the present embodiment can select field directly to gather in the cotton stalk of rear removal root, and the diameter of described cotton stalk bundle is 300 ~ 600mm.
The method that the present embodiment is pouring into curing compound and retarding agent in cotton stalk cylinder is: curing compound and retarding agent are added to the water and make slurries, the center in cotton stalk cylinder of Grouting Pipe being inserted is to bottom, Grouting Pipe is connected with grouting pump, by grouting pump, described slurries are pressed in cotton stalk cylinder again, make to be full of slurries in cotton stalk cylinder.The preferred porous PVC pipe of described Grouting Pipe.
When practical operation, Grouting Pipe can be inserted the center of cotton stalk cylinder to bottom, and Grouting Pipe is extracted on limit while marginal not slurry.In addition, during by grouting pump by described slurries press-in cotton stalk cylinder, mixer can be used to be stirred by described slurries.
Certainly, the present embodiment also can adopt other method to pour into curing compound and retarding agent, as long as described slurries can be enable to be full of cotton stalk cylinder.
The consolidation draining of the mud originally independently implemented or new barged-in fill is solidified consolidation process with grouting pile and unites two into one by the present embodiment, the operation only need carrying out one-time continuous can complete, because this reducing construction cost and significantly improve efficiency of construction, and reduce the pollution of cement solidification.Simultaneously, agricultural wastes cotton stalk is applied to extensive coastal development and encloses extra large project of reclamation by pumping filling, expand the comprehensive utilization new way of stalk, make it to change into new geotechnological regenerated resources, air pollution caused by better alleviation crop straw burning, social benefit is remarkable, significant to the sustainable development of society.
The present invention is not limited to the concrete technical scheme described in above-described embodiment, and in addition to the implementation, the present invention can also have other embodiments.All employings are equal to the technical scheme of replacing and being formed, and are the protection domain of application claims.
Claims (10)
1. apply a method for cotton stalk consolidation and solidification dredging silt, newly barged-in fill, it is characterized in that, order performs following steps:
1) cotton stalk is made cotton stalk bundle, bottom surface and the end face relevant position of described cotton stalk bundle are shaped with corresponding projection and pit respectively;
2) coordinate location to form cotton stalk cylinder by projection and pit multiple cotton stalk bundle, one deck geotextiles is wrapped up in the periphery of described cotton stalk cylinder, be then inserted in pending mud or new barged-in fill as vertical drainage body;
3) after transverse row water body is laid on the surface of pending mud or new barged-in fill, cover one deck diaphragm seal, then diaphragm seal is connected with vacuum extractor, uses this vacuum extractor to carry out the process of vacuum preloading discharging consolidation to mud;
4) after vacuum preconsolidation process, in cotton stalk cylinder, pour into curing compound and retarding agent make it to become the cotton stalk stake of reinforcing mud or new barged-in fill, thus complete the solidification to dredging silt or new barged-in fill.
2. the method for application cotton stalk consolidation according to claim 1 and solidification dredging silt, newly barged-in fill, is characterized in that: described curing compound is desulfurated plaster and slag.
3. the method for application cotton stalk consolidation according to claim 1 and 2 and solidification dredging silt, new barged-in fill, is characterized in that: described retarding agent is the mixed serum of mud and lime, NaOH and/or composite exciting agent CSN.
4. the method for application cotton stalk consolidation according to claim 1 and solidification dredging silt, newly barged-in fill, is characterized in that: the diameter of described cotton stalk bundle is 300 ~ 600mm.
5. the method for application cotton stalk consolidation according to claim 1 and solidification dredging silt, newly barged-in fill, is characterized in that: described cotton stalk is the cotton stalk that rear removal root is directly gathered in field.
6. the method for application cotton stalk consolidation according to claim 1 and solidification dredging silt, newly barged-in fill, it is characterized in that, the concrete grammar pouring into curing compound and retarding agent in step 4) in cotton stalk cylinder is: curing compound and retarding agent are added to the water and make slurries, the center in cotton stalk cylinder of Grouting Pipe being inserted is to bottom, Grouting Pipe is connected with grouting pump, by grouting pump, described slurries are pressed in cotton stalk cylinder again, make to be full of slurries in cotton stalk cylinder.
7. the method for application cotton stalk consolidation according to claim 6 and solidification dredging silt, newly barged-in fill, is characterized in that: Grouting Pipe is inserted the center of cotton stalk cylinder to bottom, and Grouting Pipe is extracted on limit while marginal not slurry.
8. the method for application cotton stalk consolidation according to claim 6 and solidification dredging silt, newly barged-in fill, is characterized in that: during by grouting pump by described slurries press-in cotton stalk cylinder, use mixer to be stirred by described slurries.
9., according to arbitrary described application cotton stalk consolidation of claim 6-8 and the method for solidification dredging silt, newly barged-in fill, it is characterized in that: described Grouting Pipe is porous PVC pipe.
10. the method for application cotton stalk consolidation according to claim 1 and solidification dredging silt, newly barged-in fill, it is characterized in that: when carrying out vacuum preloading discharging consolidation in step 3), described transverse row water body is Wheat Straw blanket and/or rice straw blanket.
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| CN106946426A (en) * | 2016-12-15 | 2017-07-14 | 苏州润弘贸易有限公司 | The method that remaining sludge makes fertilizer after sewage disposal |
| CN106966560A (en) * | 2016-12-15 | 2017-07-21 | 苏州润弘贸易有限公司 | The method that remaining sludge and rubbish from cooking make fertilizer after sewage disposal |
| CN108221971A (en) * | 2018-03-07 | 2018-06-29 | 江苏省盐城市公路管理处 | For the cotton stalk supporting construction of cement mixing method |
| CN108221912A (en) * | 2018-03-27 | 2018-06-29 | 淮海工学院 | A kind of method using from vertical reinforcement stalk stake improvement muck soil |
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| CN112127351A (en) * | 2020-08-25 | 2020-12-25 | 盐城工学院 | One-stop consolidation-solidification method for delaying hydration reaction of curing agent and fluid mud |
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| CN106966560A (en) * | 2016-12-15 | 2017-07-21 | 苏州润弘贸易有限公司 | The method that remaining sludge and rubbish from cooking make fertilizer after sewage disposal |
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| CN108221971A (en) * | 2018-03-07 | 2018-06-29 | 江苏省盐城市公路管理处 | For the cotton stalk supporting construction of cement mixing method |
| CN108221912A (en) * | 2018-03-27 | 2018-06-29 | 淮海工学院 | A kind of method using from vertical reinforcement stalk stake improvement muck soil |
| CN108221912B (en) * | 2018-03-27 | 2024-03-08 | 淮海工学院 | Method for improving mucky soil by utilizing self-vertical reinforcement straw piles |
| CN109898491B (en) * | 2019-03-04 | 2021-08-13 | 盐城工学院 | Forming method of ecological crust layer of straw solidified sludge and formed crust layer |
| CN109898491A (en) * | 2019-03-04 | 2019-06-18 | 盐城工学院 | A kind of manufacturing process of straw solidification mud ecology crust layer and the crust layer of formation |
| CN110761276A (en) * | 2019-09-25 | 2020-02-07 | 盐城工学院 | Cement-soil pile in-situ heat preservation maintenance process utilizing straw bioenergy |
| CN110761276B (en) * | 2019-09-25 | 2021-07-27 | 盐城工学院 | Cement-soil pile in-situ heat preservation maintenance process utilizing straw bioenergy |
| CN110656641A (en) * | 2019-10-15 | 2020-01-07 | 山东大学 | Environment-friendly foundation drainage structure and method |
| CN111648347A (en) * | 2020-06-11 | 2020-09-11 | 中设设计集团股份有限公司 | Drainage and grouting comprehensive pipe body and construction method thereof |
| CN112127351A (en) * | 2020-08-25 | 2020-12-25 | 盐城工学院 | One-stop consolidation-solidification method for delaying hydration reaction of curing agent and fluid mud |
| CN112136725A (en) * | 2020-08-28 | 2020-12-29 | 盐城工学院 | Method for treating fluid mud by biological combined vacuum preloading |
| CN114370050A (en) * | 2022-02-07 | 2022-04-19 | 江苏省海洋资源开发研究院(连云港) | Phosphorus-doped tailing sand powder-jet pile reinforced by cotton straws and construction method thereof |
| CN114370050B (en) * | 2022-02-07 | 2023-09-15 | 江苏海洋大学 | Powder spraying pile doped with phosphate tailing sand and reinforced with cotton straw and construction method thereof |
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Application publication date: 20150805 Assignee: Dongguan Fusheng Construction Engineering Company Limited Assignor: Yangcheng Institute of Technology Contract record no.: 2017320000096 Denomination of invention: Method for solidifying and curing dredger sludge and new dredger fill by applying cotton stalks Granted publication date: 20170301 License type: Exclusive License Record date: 20170331 |
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