CN1172191A - Method for drainage-strengthening of hydraulic-filled soft clay - Google Patents
Method for drainage-strengthening of hydraulic-filled soft clay Download PDFInfo
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- CN1172191A CN1172191A CN 97114429 CN97114429A CN1172191A CN 1172191 A CN1172191 A CN 1172191A CN 97114429 CN97114429 CN 97114429 CN 97114429 A CN97114429 A CN 97114429A CN 1172191 A CN1172191 A CN 1172191A
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- soft clay
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- filled soft
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Abstract
The present invention relates to a drained strengthening method by for barged-in soft clay fill, belonging to a foundation soil treatment method for barged in soft clay fill. It is characterized by that a layer or more than one layer of drain plates with a certain toughness are horizontally laid in the barged-in soft clay fill so as to make the water in the soft clay fill flow into water-collecting well, then the water can be discharged by vacuum pump, so that the water content of upper most surface layer soft clay is very little, and its strength is high, and the deformation under the action of external load is small too, therefore it can reduce backfilling earth volume, and can greatly reduce engineering cost.
Description
The invention belongs to a kind of method for processing foundation of hydraulic-filled soft clay.
Before the present invention realizes, people to the processing of hydraulic-filled soft clay are: after hydraulic reclamation reaches certain absolute altitude, natural drying 3-4 month or longer time, this moment, the hydraulic-filled soft clay upper epidermis formed one deck crust layer (about 0.2-0.3M is thick), spread layer of non-woven fabric, the thick plain soil of 0.4M, the thick sand cushion of 0.4M then thereon respectively, set the vertical drainage passage and carry out piling prepressing or vacuum preloading.Because barged-in fill is extremely inhomogeneous, water content is big, and the deflection of soil is big under the lotus effect outside, at the bottom of the intensity.The other problem that said method exists is: the operation of carrying out the ground processing is many, complicated operation, and land-based area backfilling of earthwork amount is big, and consolidation time is long, the cost height.
The drain reinforcing method that the purpose of this invention is to provide a kind of hydraulic-filled soft clay, thus the problem that above-mentioned prior art exists can be solved effectively.
Fundamental technics solution of the present invention is: level is laid one or more layers of band drain with certain toughness in the bury of hydraulic reclamation, so that the water in the hydraulic-filled soft clay is in band drain is directed at collecting well, and discharges with vacuum pump.
Elaborate below in conjunction with embodiments of the invention and accompanying drawing.
Accompanying drawing 1 is the schematic diagram of an embodiment of the present invention;
Accompanying drawing 2 is the schematic cross-section of the used band drain of the present invention.
In the hydraulic-filled soft clay process,, can lay band drain (2) in the top layer or the bottom level of hydraulic-filled soft clay (1), and then carry out the hydraulic reclamation of upper strata bury when hydraulic reclamation during to certain thickness.In the hydraulic-filled soft clay process, because the action of gravity of clay particle, it near the hydraulic reclamation mouth coarse granule, away from hydraulic reclamation mouth place is fine grained, and the fine grained water content is big, sedimentation is also big, so form the gradient of uniform 2%/M naturally to enclosing low bank between fields (3) at the hydraulic reclamation mouth, band drain is the same gradient that forms naturally more than the 2%/M when level is laid, all band drains all come together in and enclose low bank between fields, and be collected in the collecting well (5) along enclosing the band drain (4) that the low bank between fields direction arranges through enclosing low bank between fields central authorities, with drainage plant water is discharged then and enclose outside the low bank between fields.
When laying band drain, can be one or more layers according to the height laying of hydraulic reclamation clay, interfloor distance can be 1.0-1.8M, horizontal range can be 1.0-1.8M.
Described band drain should have certain toughness, can manufacture by plastics, and its upper and lower two all have groove, the outer layer of non-woven fabric (6) that coats.This nonwoven can play a role in filtering to soft being stained with of hydraulic reclamation, water in the hydraulic-filled soft clay is infiltrated in the groove on band drain top layer, and under the outer lotus effect of upper strata hydraulic-filled soft clay, make water in lower floor's bury in the flow faster on band drain surface, thereby accelerated the draining, fixed of hydraulic-filled soft clay.
Because level is laid band drain, shortened the drainage distance of hydraulic-filled soft clay, therefore, the bury on top layer is than little without the bury water content of above-mentioned processing, the intensity height, distortion is also little down in lotus effect outside, thereby can reduce the compressive strain under the lotus effect outside from now on of this element soil layer, reduce the backfill earth volume, greatly reduce engineering cost.
After adopting method of the present invention, with the thick bury of Efficiency in Buildings in Tianjin Area hydraulic reclamation 5M is example, the distortion of hydraulic-filled soft clay can reduce about 0.9M, intensity improves about 50%, and the argillic horizon surface also improves significantly, when handling again, can cancel the bed course of the thick plain soil of 0.4M fully, add the minimizing of aforementioned clay distortion, can save the pad soil layer of the thick plain soil of 1.3M altogether, can save engineering cost greatly.Embodiment 1
Behind the thick bury of hydraulic reclamation 0.5M, when laying band drain, the thick bury of later every hydraulic reclamation 1M can be laid one deck, when the height of bury is 5M, lays recessed layer altogether, and the horizontal range of every layer of band drain can be 1.8M.Embodiment 2
Behind the thick bury of hydraulic reclamation 0.3M, when laying band drain, the thick bury of later every hydraulic reclamation 1.6M can be laid one deck, when the height of bury is 6M, lays three layers altogether, and the horizontal range of every layer of band drain can be 1.2M.
Claims (2)
1. the drain reinforcing method of a hydraulic-filled soft clay is characterized in that: the one or more layers band drain with certain toughness of level laying in the bury of hydraulic reclamation.
2. drain reinforcing method according to claim 1 is characterized in that: the material of described band drain can be plastics, and upper and lower two of plate all have groove, and plate coats layer of non-woven fabric outward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97114429 CN1172191A (en) | 1997-07-18 | 1997-07-18 | Method for drainage-strengthening of hydraulic-filled soft clay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97114429 CN1172191A (en) | 1997-07-18 | 1997-07-18 | Method for drainage-strengthening of hydraulic-filled soft clay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1172191A true CN1172191A (en) | 1998-02-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97114429 Pending CN1172191A (en) | 1997-07-18 | 1997-07-18 | Method for drainage-strengthening of hydraulic-filled soft clay |
Country Status (1)
| Country | Link |
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| CN (1) | CN1172191A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101824818A (en) * | 2010-05-10 | 2010-09-08 | 王开明 | Method for consolidating hydraulically-filled soft clay in hydraulic filling process by using vacuum preloading method |
| CN107059523A (en) * | 2017-06-20 | 2017-08-18 | 天津大学 | A kind of construction method that road is built on reclaimed ground and the subgrade strengthening structure of construction method formation |
| CN109537569A (en) * | 2018-10-31 | 2019-03-29 | 华中科技大学 | The prediction technique of the large deformation infall process of multiple-layer horizontal vacuum consolidation saturated dredger soft soil |
| RU2707624C1 (en) * | 2019-02-06 | 2019-11-28 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Кубанский государственный аграрный университет имени И.Т. Трубилина" | Method for determining characteristics of soil swelling |
-
1997
- 1997-07-18 CN CN 97114429 patent/CN1172191A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101824818A (en) * | 2010-05-10 | 2010-09-08 | 王开明 | Method for consolidating hydraulically-filled soft clay in hydraulic filling process by using vacuum preloading method |
| CN101824818B (en) * | 2010-05-10 | 2012-11-28 | 天津市海岸带工程有限公司 | Method for consolidating hydraulically-filled soft clay in hydraulic filling process by using vacuum preloading method |
| CN107059523A (en) * | 2017-06-20 | 2017-08-18 | 天津大学 | A kind of construction method that road is built on reclaimed ground and the subgrade strengthening structure of construction method formation |
| CN109537569A (en) * | 2018-10-31 | 2019-03-29 | 华中科技大学 | The prediction technique of the large deformation infall process of multiple-layer horizontal vacuum consolidation saturated dredger soft soil |
| CN109537569B (en) * | 2018-10-31 | 2019-10-08 | 华中科技大学 | The prediction technique of the large deformation infall process of multiple-layer horizontal vacuum consolidation saturated dredger soft soil |
| RU2707624C1 (en) * | 2019-02-06 | 2019-11-28 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Кубанский государственный аграрный университет имени И.Т. Трубилина" | Method for determining characteristics of soil swelling |
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