CN106638554A - Treatment method of soft clay foundation - Google Patents
Treatment method of soft clay foundation Download PDFInfo
- Publication number
- CN106638554A CN106638554A CN201710005828.XA CN201710005828A CN106638554A CN 106638554 A CN106638554 A CN 106638554A CN 201710005828 A CN201710005828 A CN 201710005828A CN 106638554 A CN106638554 A CN 106638554A
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- China
- Prior art keywords
- liquid injection
- soft clay
- fluid injection
- clay foundation
- curing agent
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
-
- 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
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
Abstract
The invention discloses a treatment method of a soft clay foundation. The method comprises the steps that a, multiple water drainage plates (2) are inserted; b, multiple liquid injection pipes (3) are inserted; c, a horizontal liquid injection pipe network communicating with the top ends of the vertical liquid injection pipes (3) is laid and communicates with a liquid injection pump (6); d, a coarse sand cushion layer (7) is laid, a horizontal filtering pipe network communicating with the top ends of the water drainage plates (2) is buried in the coarse sand cushion layer (7), and the filtering pipe network communicates with a vacuum pump (10); e, a sealing system is laid on the coarse sand cushion layer (7); f, the vacuum pump (10) is started for beginning vacuumizing; g, the liquid injection pump (6) is started, and a curing agent of a bio-enzyme solution is pressed into the foundation; and h, after liquid injection is completed for a period of time, the vacuum pump (10) is started again, and vacuumizing continues to be carried out until sedimentation is stable basically. The method enables free water and bound water to be effectively drained out of the soft clay foundation.
Description
Technical field
The present invention relates to foundation treatment technology field, is especially a kind of reinforcing and processing method of Soft Clay Foundation.
Background technology
In areas such as the riverine, Bin Hu of China coast and inland, widely distributed Soft Clay Foundation.As economy and city are built
If development, building site demand steeply rises, and people are desirable with the idle Soft Clay Foundation in this part naturally.But will profit
With this part Soft Clay Foundation, being how of first having to face processed Soft Clay Foundation, makes the problem that it solidifies.
The method of conventional Soft Ground mainly has two kinds.
One kind is vacuum method, and the method first inserts at a certain distance vertical plastic draining board in ground, then
One layer of coarse sand is laid on ground as drainage blanket, and crisscross grid type level is buried in layer of sand to chimney filter, and with field
Outer vavuum pump connection, air-locked vacuum diaphragm sealing is then laid on layer of sand and is covered in earth's surface, finally opens vacuum pumping
Gas forms negative pressure so that Free water is extracted in the soil body, while also causing the effective stress increase of ground.
But vacuum method has a larger limitation, i.e., soft clay particle itself is thin, plasticity is high, water content is big,
Stickiness particle surface can adsorb substantial amounts of combination water and constitute electric double layer moisture film, and the shearing resistance of the thickness of electric double layer moisture film to cohesive soil is strong
Degree has a great impact.Although the Free water in the lower ground of negative pressure of vacuum effect is extracted, the absorption of soft clay particle surface
But be difficult to discharge with reference to water, cause Foundation Treatment Effect it is poor, process after the soil body bearing capacity it is still not enough.
Another kind is solidification method, i.e., the curing agent for adding the calcium content based on cement, lime higher in soft soil foundation,
And be sufficiently stirred for so that soil particle layer adhesive solidification, so as to improve intensity, density and the bearing capacity of the soil body.Above-mentioned solidification method
There is also several drawbacks：First to the mud in Soft Clay Foundation, solidification effect is general；And, stirring is had high demands during construction,
Once the uneven intensity that will affect to reduce the solidification soil body of stirring；And, the method needs to expend substantial amounts of cement, lime etc.
Curing agent, it is high cost, less economical.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of Free water that can effectively discharge in Soft Clay Foundation and combination
Water, solidification effect are good, need not stir, cost control is reasonable, the processing method of the Soft Clay Foundation of good economy performance.
The technical solution of the present invention is to provide a kind of processing method of Soft Clay Foundation, and its step includes：
A, to intend process Soft Soil Layer in insert multiple vertical drain bars at regular intervals；
B, to intend process Soft Soil Layer in insert multiple vertical liquid injection pipes at regular intervals；
The level that c, laying are connected with vertical liquid injection pipe top to fluid injection managed network, level to fluid injection managed network include fluid injection
House steward and fluid injection are in charge of, and fluid injection house steward connect with topping-up pump；
D, laying coarse sand bed course, and the horizontal direction chimney filter network connected with drain bar top is buried in coarse sand bed course,
Chimney filter network includes total chimney filter and branch's chimney filter, and total chimney filter is connected with vavuum pump；
E, on coarse sand bed course lay sealing system；
F, startup vavuum pump start to vacuumize, until monitoring that ground settlement obvious flex point occurs with the curve of time, sink
When reduction of speed degree is greatly reduced, stop vacuumizing；
G, unlatching topping-up pump, the curing agent of biological enzyme solutions is pressed in ground, when curing agent injection rate reaches design load
Or during surface uplift, stop fluid injection；
A period of time, reopens vavuum pump after the completion of h, fluid injection, continues to vacuumize, until sedimentation is basicly stable.
The processing method of Soft Clay Foundation of the present invention compared with prior art, with following remarkable advantage and beneficial effect：
The processing method of the present invention, overcomes the limitation of traditional vacuum method and solidification method, first with vacuum pumping
The Free water in ground is taken, then by monitoring ground settlement speed, Free water most of opportunity extracted out is grasped, to ground
Pour into the curing agent of biology enzyme so as to chemical reaction occurs so as to break the double electrical layerses of soft clay with soil particle, releases
The combination water of soil particle adsorption is released, then by vacuumizing discharge again, while so that soil particle produces cementing, enhancing
Vacuum preloading drainage efficiency, improves the cementing strength of soil particle, increases substantially the solidification effect of Soft Clay Foundation, and the solidification
There is no the uneven adverse effect of stirring in process, while need not expend the high calciums such as substantial amounts of lime, cement consolidating naturally without the need for stirring
Agent, cost control is low, good economy performance.
Used as improvement, the vertical liquid injection pipe in step b is hollow plastic tube, and the side wall of vertical liquid injection pipe is provided with multiple differences
The through hole of height, side wall is wrapped with permeable geotextiles, and the bottom of vertical liquid injection pipe is sealed by lid, arranges multiple differing heights
Through hole be conducive to curing agent uniformly to spread in the soil body, increase solidification effect, and the geotextiles of outsourcing can prevent through hole from blocking,
It is to prevent solution to be quickly lost in from bottom by bottom end seal, is also a kind of measure for being conducive to solution to spread.
As one kind preferably, curing agent selects calm enzyme solutions, and calm enzyme is 1/1000～1/500 with the volume ratio of water,
The curing agent of above-mentioned concentration and component is preferable to the double electrical layerses execution of soil particle.
As another kind preferably, curing agent sends enzyme to be 1/1500～1/1000 with the volume ratio of water from enzyme solutions are sent, on
The curing agent for stating concentration and component is also relatively good to the double electrical layerses execution of soil particle.
Used as improving again, step h is vacuumized after stopping, vertical liquid injection pipe being extracted to wait to reuse, as such, it is possible to many
It is secondary to recycle above-mentioned pipeline, further reduce construction cost.
Description of the drawings
Fig. 1 is the overlooking the structure diagram of the device of the processing method for implementing Soft Clay Foundation of the present invention.
Fig. 2 is the side cross section structure diagram of the device of the processing method for implementing Soft Clay Foundation of the present invention.
Fig. 3 is the vertical liquid injection pipe mplifying structure schematic diagram of the processing method of Soft Clay Foundation of the present invention.
1 shown in figure, intend processing Soft Soil Layer, 2, drain bar, 3, vertical liquid injection pipe, 4, fluid injection house steward, 5, fluid injection be in charge of, 6,
Topping-up pump, 7, coarse sand bed course, 8, total chimney filter, 9, branch's chimney filter, 10, vavuum pump, 11, through hole, 12, the preferable soil layer in bottom.
Specific embodiment
Below in conjunction with the accompanying drawings the invention will be further described with specific embodiment.
As shown in Figure 1, Figure 2, Figure 3 shows, the processing method of Soft Clay Foundation of the present invention, its step includes：
A, to intend process Soft Soil Layer 1 in insert multiple vertical drain bars 2 at regular intervals；The laying of drain bar and existing
The vacuum method of technology is identical, according to intending processing thickness, moisture content and the infiltrative difference of Soft Soil Layer 1, selects corresponding type
Number drain bar 2, by board-plugging device insertion intend process Soft Soil Layer 1 in, insertion depth through intend process Soft Soil Layer 1 and insert bottom compared with
0.5m is advisable in good soil layer 12.
B, to intend process Soft Soil Layer 1 in insert multiple vertical liquid injection pipes 3 at regular intervals；Vertical liquid injection pipe 3 is from hollow
Plastic tube, the side wall of vertical liquid injection pipe 3 is provided with the through hole 11 of multiple differing heights, and side wall is wrapped with permeable geotextiles, vertically
The bottom of liquid injection pipe 3 is sealed by lid.The insertion depth of vertical liquid injection pipe 3 is intend processing the thickness of Soft Soil Layer 1 0.5～0.8.
The level that c, laying are connected with the top of vertical liquid injection pipe 3 to fluid injection managed network, level to fluid injection managed network include note
Liquid house steward 4 and fluid injection are in charge of 5, and fluid injection house steward 4 connects with topping-up pump 6, and specifically, fluid injection house steward 4 and fluid injection are in charge of 5 and are vertically connected
Logical, the top of vertical liquid injection pipe 3 is in charge of 5 and is connected with fluid injection.
D, laying coarse sand bed course 7, and the horizontal direction chimney filter net connected with the top of drain bar 2 is buried in coarse sand bed course 7
Network, chimney filter network includes total chimney filter 8 and branch's chimney filter 9, and total chimney filter 8 is connected with vavuum pump 10, specifically, branch's chimney filter 9 and
Total chimney filter 8 is vertical and connects, and the top of drain bar 2 connects with branch chimney filter 9.
Monitoring system, including vacuum-degree monitoring point and surface subsidence monitoring point, above-mentioned monitoring system and prior art are set
The monitoring system that middle vacuum method is adopted is consistent.
E, on coarse sand bed course 7 lay sealing system；Specifically, first in the one layer of non-woven geotextile of laying of coarse sand bed course 7,
1～2 layer of vacuum diaphragm is re-layed, and imbeds press mold ditch and fixed.
F, start vavuum pump 10 start to vacuumize, make vacuum maintain 80～85kpa, until monitor ground settlement with
There is obvious flex point in the curve of time, when sinking speed is greatly reduced, illustrates that plan processes the base of the Free water in Soft Soil Layer 1
Originally exhaust, therefore stop vacuumizing.
G, unlatching topping-up pump 6, the curing agent of biological enzyme solutions is pressed in ground, when curing agent injection rate reaches design load
Or during surface uplift, stop fluid injection.The design load of injection rate is generally intended processing the 0.05～0.1 of the volume of Soft Soil Layer 1.
Curing agent can select calm enzyme solutions, and calm enzyme is 1/1000～1/500 with the volume ratio of water.
Curing agent can also send enzyme to be 1/1500～1/1000 with the volume ratio of water from enzyme solutions are sent.
A period of time, as after 7～10 days, reopens vavuum pump 10 after the completion of h, fluid injection, continues to vacuumize, until sedimentation
It is basicly stable.Now, in ground the most of release of combination water and Free water, and curing agent is also right under prefabricating load effect
Soil particle generation is cementing, therefore reaches processing requirement.
After vacuumizing stopping, vacuum load is laid down, vertical liquid injection pipe 3 is extracted to wait to reuse.
Claims (5)
1. a kind of processing method of Soft Clay Foundation, its step includes：
A, multiple vertical drain bars (2) are inserted at regular intervals to intending processing in Soft Soil Layer (1)；
B, multiple vertical liquid injection pipes (3) are inserted at regular intervals to intending processing in Soft Soil Layer (1)；
The level that c, laying are connected with vertical liquid injection pipe (3) top to fluid injection managed network, level to fluid injection managed network include fluid injection
House steward (4) and fluid injection are in charge of (5), and fluid injection house steward (4) connects with topping-up pump (6)；
D, laying coarse sand bed course (7), and the horizontal direction chimney filter connected with drain bar (2) top is buried in coarse sand bed course (7)
Network, chimney filter network includes total chimney filter (8) and branch's chimney filter (9), and total chimney filter (8) connects with vavuum pump (10)；
E, on coarse sand bed course (7) lay sealing system；
F, startup vavuum pump (10) start to vacuumize, until monitoring that ground settlement obvious flex point occurs with the curve of time, sink
When reduction of speed degree is greatly reduced, stop vacuumizing；
G, open topping-up pump (6), by the curing agent of biological enzyme solutions press-in ground, when curing agent injection rate reach design load or
During surface uplift, stop fluid injection；
A period of time, reopens vavuum pump (10) after the completion of h, fluid injection, continues to vacuumize, until sedimentation is basicly stable.
2. the processing method of Soft Clay Foundation according to claim 1, it is characterised in that：Vertical liquid injection pipe in step b
(3) it is hollow plastic tube, the side wall of vertical liquid injection pipe (3) is provided with the through hole (11) of multiple differing heights, and side wall is wrapped with
Water geotextiles, the bottom of vertical liquid injection pipe (3) is sealed by lid.
3. the processing method of Soft Clay Foundation according to claim 1, it is characterised in that：Curing agent is molten from calm enzyme
Liquid, calm enzyme is 1/1000～1/500 with the volume ratio of water.
4. the processing method of Soft Clay Foundation according to claim 1, it is characterised in that：Curing agent is selected and sends enzyme solutions,
Enzyme is sent to be 1/1500～1/1000 with the volume ratio of water.
5. the processing method of Soft Clay Foundation according to claim 1, it is characterised in that：Step h is vacuumized after stopping, will
Vertical liquid injection pipe (3) is extracted to wait to reuse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710005828.XA CN106638554B (en) | 2017-01-05 | 2017-01-05 | The processing method of Soft Clay Foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710005828.XA CN106638554B (en) | 2017-01-05 | 2017-01-05 | The processing method of Soft Clay Foundation |
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| Publication Number | Publication Date |
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| CN106638554A true CN106638554A (en) | 2017-05-10 |
| CN106638554B CN106638554B (en) | 2019-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710005828.XA Expired - Fee Related CN106638554B (en) | 2017-01-05 | 2017-01-05 | The processing method of Soft Clay Foundation |
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| Country | Link |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108824419A (en) * | 2018-06-26 | 2018-11-16 | 温州大学 | The method of the vacuum pre-pressed joint biomineralization reinforcing High water cut soil body |
| CN112942308A (en) * | 2021-01-28 | 2021-06-11 | 中铁三局集团广东建设工程有限公司 | Soft foundation pavement construction device and soft foundation pavement construction method |
| CN113026712A (en) * | 2021-03-27 | 2021-06-25 | 中工建设集团(福建)有限公司 | Process for solidifying coastal soft soil base soil by tylosin |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100195689B1 (en) * | 1996-09-14 | 1999-06-15 | 유영을 | Quick consolidated method using pipe drain system |
| CN203462472U (en) * | 2013-07-30 | 2014-03-05 | 宁波高新区围海工程技术开发有限公司 | Grouting device |
| CN203613528U (en) * | 2013-12-18 | 2014-05-28 | 中铁二十局集团第四工程有限公司 | Vacuum and surcharge combined preloading drainage consolidation structure of soft soil foundation |
| CN104532825A (en) * | 2015-01-02 | 2015-04-22 | 韩少鹏 | Rapid soft foundation solidification device and construction method thereof |
| KR20160012290A (en) * | 2014-07-23 | 2016-02-03 | 삼성물산 주식회사 | Soft ground improvement method with air hammering |
-
2017
- 2017-01-05 CN CN201710005828.XA patent/CN106638554B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100195689B1 (en) * | 1996-09-14 | 1999-06-15 | 유영을 | Quick consolidated method using pipe drain system |
| CN203462472U (en) * | 2013-07-30 | 2014-03-05 | 宁波高新区围海工程技术开发有限公司 | Grouting device |
| CN203613528U (en) * | 2013-12-18 | 2014-05-28 | 中铁二十局集团第四工程有限公司 | Vacuum and surcharge combined preloading drainage consolidation structure of soft soil foundation |
| KR20160012290A (en) * | 2014-07-23 | 2016-02-03 | 삼성물산 주식회사 | Soft ground improvement method with air hammering |
| CN104532825A (en) * | 2015-01-02 | 2015-04-22 | 韩少鹏 | Rapid soft foundation solidification device and construction method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108824419A (en) * | 2018-06-26 | 2018-11-16 | 温州大学 | The method of the vacuum pre-pressed joint biomineralization reinforcing High water cut soil body |
| CN112942308A (en) * | 2021-01-28 | 2021-06-11 | 中铁三局集团广东建设工程有限公司 | Soft foundation pavement construction device and soft foundation pavement construction method |
| CN112942308B (en) * | 2021-01-28 | 2022-06-24 | 中铁三局集团广东建设工程有限公司 | Soft foundation pavement construction device and soft foundation pavement construction method |
| CN113026712A (en) * | 2021-03-27 | 2021-06-25 | 中工建设集团(福建)有限公司 | Process for solidifying coastal soft soil base soil by tylosin |
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| Publication number | Publication date |
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| CN106638554B (en) | 2019-08-06 |
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Granted publication date: 20190806 Termination date: 20210105 |
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