CN202380456U - Device for deep, vacuum and efficient unwatering and stabilizing of soil body - Google Patents
Device for deep, vacuum and efficient unwatering and stabilizing of soil body Download PDFInfo
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- CN202380456U CN202380456U CN2011205670463U CN201120567046U CN202380456U CN 202380456 U CN202380456 U CN 202380456U CN 2011205670463 U CN2011205670463 U CN 2011205670463U CN 201120567046 U CN201120567046 U CN 201120567046U CN 202380456 U CN202380456 U CN 202380456U
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Abstract
A device for deep, vacuum and efficient unwatering and stabilizing of a soil body relates to the technical field of ground treatment and aims to achieve the purposes of improving the stabilizing effect and reducing the implementation cost. The device comprises a vertical negative-pressure well capable of generating negative pressure in the deep layer of the soil body, a jet pump, a water collecting tank, a jet pipe, a water collecting pipe and at least one water draining piece, wherein the negative-pressure well is buried in the soil body in a to-be-stabilized area; a filter pipe is arranged at the bottom end of the negative-pressure well; the jet pump and the water collecting tank are both mounted on the ground; the water inlet of the jet pump is connected to the water outlet of the water collecting tank; the jet pipe and the water collecting pipe are both arranged in the negative-pressure well; the pipe orifice at one end of the jet pipe is connected to the jet port of the jet pump; the pipe orifice at the other end of the jet pipe extends to the bottom of the negative-pressure well; the pipe orifice at one end of the water collecting pipe is connected to the water inlet of the water collecting tank; the pipe orifice at the other end of the water collecting pipe extends to the bottom of the negative-pressure well; and each water draining piece is vertically inserted in the soil body at the part at the periphery of the negative-pressure well. The device provided by the utility model has good unwatering and stabilizing effects and a low implementation cost.
Description
Technical field
The utility model relates to foundation treatment technology, particularly relates to a kind of technology of device of the deep vacuum high effective dredging strengthening soil body.
Background technology
The dredging strengthening soil body is that ground is handled the most frequently used process.Traditional dredging strengthening soil body method is in treating the soil body of reinforcing area, to bury the precipitation well underground; The precipitation depth of one-level light well point is generally 6 meters; When precipitation depth during greater than 6 meters, then adopt pipe well (can be with vacuum) the drainage soil body, distance is generally 14～19m between the pipe well.Because cohesive soil permeability little (for the cohesive soil of the sand silty soil that presss from both sides thin layer, the vertical little 50-100 of osmotic coefficient ratio horizontal permeation coefficient doubly), cone of depression is steep; Therefore adopt and bury the precipitation well underground and come dredging strengthening soil body method affect to be limited in scope; Dredging strengthening effect to the soil body is not good enough yet, adopts the soil body behind this method dredging strengthening in follow-up work progress, often need set up light well point and remedy; Duration can be incured loss through delay, and cost is also higher.
In addition; Other dredging strengthening soil body method also has the vacuum preconsolidation method; This method is through adding vacuum on the face of land, makes underground water along band drain (pipe) seepage flow upwards, but phreatic flow velocity and flow are all less relatively when this method is implemented; So it is not its engineering time is longer, and good enough to the dredging strengthening effect of the soil body yet.
In addition, other dredging strengthening soil body method also has IFCO worker's method, and this method is constructed Sha Qiang in ground; Lay the draining longitudinal tubule (L tubule) in sand wall bottom, and apply the water vertical tube that runs in again, then effect vacuum on the face of land along distance certain at interval on the longitudinal tubule (L tubule); Make underground water along the draining seepage flow that makes progress; This method has overcome vacuum preconsolidation method flow velocity and the little shortcoming of flow, and is better to the dredging strengthening effect of the soil body, but lays the draining longitudinal tubule (L tubule) in sand wall bottom; Need to use special-purpose machinery, so its implementation cost is higher.
The utility model content
To the defective that exists in the above-mentioned prior art, it is effective that the utility model technical problem to be solved provides a kind of dredging strengthening to the soil body, and the device of the low deep vacuum high effective dredging strengthening soil body of implementation cost.
In order to solve the problems of the technologies described above; The device of a kind of deep vacuum high effective dredging strengthening soil body that the utility model provided; It is characterized in that: comprise the vertical negative pressure well that can produce negative pressure, reach jet pump, header tank, jet pipe, header, at least one drainage element in soil body deep layer;
Said negative pressure well is embedded in treats that in the reinforcing area soil body, its bottom is provided with chimney filter;
Said jet pump, header tank are installed in ground, and the water inlet of jet pump is received the delivery port of header tank;
Said jet pipe, header all are located in the negative pressure well, and an end mouth of pipe of jet pipe is received the jet orifice of jet pump, and the other end mouth of pipe extends the negative pressure bottom, and an end mouth of pipe of header is received the water inlet of header tank, and the other end mouth of pipe extends the negative pressure bottom;
Each drainage element vertically is inserted in the negative pressure well periphery soil body.
Further, the borehole wall periphery of said negative pressure well is fixed with geotextile, and between geotextile and undisturbed soil, is provided with the sand filter blanket that one deck is made up of filter sand.
Further, said negative pressure well is the concentric type injector well.
Further, said drainage element is band drain or gutter.
The device of the deep vacuum high effective dredging strengthening soil body that the utility model provides; Utilize negative pressure well and jet pump to produce negative pressure at dark soil layer; Make the Free water transverse drainage negative pressure well in the soil body, and utilize drainage element to shorten the drainage path of the soil body, accelerate rate of consolidation; The soil body is had good dredging strengthening effect, and implementation cost is low.
Description of drawings
Fig. 1 is the schematic representation of apparatus of the deep vacuum high effective dredging strengthening soil body of the utility model embodiment;
Fig. 2 is the sketch map that the device of the deep vacuum high effective dredging strengthening soil body of the utility model embodiment is applied to the big occasion in soil body zone.
The specific embodiment
Embodiment to the utility model describes in further detail below in conjunction with description of drawings, but present embodiment is not limited to the utility model, and analog structure of every employing the utility model and similar variation thereof all should be listed the protection domain of the utility model in.
As shown in Figure 1; The device of a kind of deep vacuum high effective dredging strengthening soil body that the utility model embodiment is provided; It is characterized in that: comprise the vertical negative pressure well 5 that can produce negative pressure, reach jet pump 1, header tank 2, jet pipe 3, header 4, at least one drainage element 6 in soil body deep layer;
Said negative pressure well 5 is embedded in treats that in the reinforcing area soil body, its bottom is provided with chimney filter 8;
Said jet pump 1, header tank 2 are installed in ground, and the water inlet of jet pump 1 is received the delivery port of header tank 2;
Said jet pipe 3, header 4 all are located in the negative pressure well 5; The one end mouth of pipe of jet pipe 3 is received the jet orifice of jet pump 1; The other end mouth of pipe extends negative pressure well 5 bottoms, and an end mouth of pipe of header 4 is received the water inlet of header tank 2, and the other end mouth of pipe extends negative pressure well 5 bottoms;
Each drainage element 6 vertically is inserted in the negative pressure well 5 peripheral soil bodys; To increase the negative pressure transmission capacity; Simultaneously that former underground water is multidirectional permeation pathway changes the horizontal infiltration on stratum into and along the vertical infiltration of drainage element; Can shorten the drainage path of the soil body, accelerate rate of consolidation, the quantity of drainage element 6, layout density and vertical insertion depth require to confirm according to the physico-mechanical properties of treating the reinforcing area soil body and reinforcing.
Among the utility model embodiment; The borehole wall periphery of said negative pressure well 5 is fixed with geotextile 7; And between geotextile 7 and undisturbed soil, be provided with the sand filter blanket 9 that one deck is made up of filter sand; Combination filtering layer by geotextile 7 and sand filter blanket 9 constitute can be strengthened the vertical water-flowing amount of negative pressure well borehole wall periphery, and then when guaranteeing the dredging strengthening effect, reduces negative pressure well hole diameter, reduces the pore-forming cost.
Among the utility model embodiment, said negative pressure well 5 is concentric type injector wells, and said drainage element 6 is band drain or gutter.
The method that the utility model embodiment implements the deep vacuum high effective dredging strengthening soil body is following:
Utilize jet pump 1 to continue to extract the water in the header tank 2; And with the water that extracts through jet pipe 3 to negative pressure well 5 bottom sustained firings; Make negative pressure well 5 bottoms produce negative pressure; Make underground water in the negative pressure well 5 peripheral soil bodys under the negative pressure graviational interaction, infiltrate in the negative pressure wells 5 from the chimney filter 8 of negative pressure well 5 bottoms;
Simultaneously, under the lasting extraction of jet pump 1, also produce negative pressure in the header tank 2, make the water in the negative pressure well 5 flow into header tank 2 through header 4;
Wherein, Underground water in the soil body between negative pressure well 5 and the drainage element 6; Under the effect of negative pressure gravitation, laterally infiltrate the combination filtering layer that constitutes by geotextile 7 and sand filter blanket 9; Then under the acting in conjunction of gravity and negative pressure gravitation, earlier along the combination filtering layer that constitutes by geotextile 7 and sand filter blanket 9 vertical seepage flow, the chimney filter 8 horizontal seepage flow of end downwards towards the negative pressure shaft bottom;
Wherein, the underground water in the drainage element 6 periphery soil bodys, horizontal seepage flow to drainage element 6 places under the effect of negative pressure gravitation, then under the acting in conjunction of gravity and negative pressure gravitation, earlier along drainage element 6 vertical seepage flow downwards, again along the stratum towards the horizontal seepage flow of negative pressure well 5 directions;
After the operation of the dredging strengthening soil body finishes, negative pressure well and each drainage element are vertically pulled out with static(al), to reduce soil disturbance.
As shown in Figure 2, when needing the soil body zone of dredging strengthening big, can soil body zone be divided into a plurality of subregions, the device of the utility model embodiment is installed at each subregion then.
The utility model embodiment is applicable to the soil mass of foundation pit processing; Can be according to place geotechnical investigation report and similar engineering experience, time of pumping; The mechanical index of the back soil body is reinforced in prediction, and the soil body is behind the quick dredging strengthening of deep vacuum, and its strength-deformation characteristic can obtain obviously to improve; Can improve bearing capacity of foundation soil, soil body sedimentation behind minimizing retaining wall displacement of control foundation ditch and the wall.
The utility model embodiment is specially adapted to contain the soil body of flour sand property short lap; Such soil body level wants big 50 to 100 times to the vertical transmission coefficient of osmotic coefficient ratio; The underground water that is pooled to drainage element is through containing the soil body of silt short lap; Can flow into the combination filtering layer of negative pressure well soon, reduce the groundwater seepage resistance widely.
Claims (4)
1. the device of a deep vacuum high effective dredging strengthening soil body is characterized in that: comprise the vertical negative pressure well that can produce negative pressure in soil body deep layer, reach jet pump, header tank, jet pipe, header, at least one drainage element;
Said negative pressure well is embedded in treats that in the reinforcing area soil body, its bottom is provided with chimney filter;
Said jet pump, header tank are installed in ground, and the water inlet of jet pump is received the delivery port of header tank;
Said jet pipe, header all are located in the negative pressure well, and an end mouth of pipe of jet pipe is received the jet orifice of jet pump, and the other end mouth of pipe extends the negative pressure bottom, and an end mouth of pipe of header is received the water inlet of header tank, and the other end mouth of pipe extends the negative pressure bottom;
Each drainage element vertically is inserted in the negative pressure well periphery soil body.
2. the device of the deep vacuum high effective dredging strengthening soil body according to claim 1 is characterized in that: the borehole wall periphery of said negative pressure well is fixed with geotextile, and between geotextile and undisturbed soil, is provided with the sand filter blanket that one deck is made up of filter sand.
3. the device of the deep vacuum high effective dredging strengthening soil body according to claim 1 is characterized in that, said negative pressure well is the concentric type injector well.
4. the device of the deep vacuum high effective dredging strengthening soil body according to claim 1 is characterized in that, said drainage element is band drain or gutter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205670463U CN202380456U (en) | 2011-12-30 | 2011-12-30 | Device for deep, vacuum and efficient unwatering and stabilizing of soil body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205670463U CN202380456U (en) | 2011-12-30 | 2011-12-30 | Device for deep, vacuum and efficient unwatering and stabilizing of soil body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202380456U true CN202380456U (en) | 2012-08-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205670463U Expired - Lifetime CN202380456U (en) | 2011-12-30 | 2011-12-30 | Device for deep, vacuum and efficient unwatering and stabilizing of soil body |
Country Status (1)
| Country | Link |
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| CN (1) | CN202380456U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102966090A (en) * | 2012-12-14 | 2013-03-13 | 北京科技大学 | System for automatically draining water on side slope and method therefor |
| CN105951708A (en) * | 2016-06-03 | 2016-09-21 | 东南大学 | Soil body reinforcement device and reinforcement method for pipe jacking construction in sand soil foundation |
-
2011
- 2011-12-30 CN CN2011205670463U patent/CN202380456U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102966090A (en) * | 2012-12-14 | 2013-03-13 | 北京科技大学 | System for automatically draining water on side slope and method therefor |
| CN102966090B (en) * | 2012-12-14 | 2014-07-02 | 北京科技大学 | System for automatically draining water on side slope and method therefor |
| CN105951708A (en) * | 2016-06-03 | 2016-09-21 | 东南大学 | Soil body reinforcement device and reinforcement method for pipe jacking construction in sand soil foundation |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 200444 Shanghai city Baoshan District Jinqiu road 2399 Lane 198, building 1 B zone Patentee after: SHANGHAI GUANGLIAN ENVIRONMENTAL & GEOTECHNICAL ENGINEERING CO., LTD. Address before: 200444 Shanghai city Baoshan District Jinqiu road 2399 Lane 198, building 1 B zone Patentee before: Shanghai Guanglian Building Development Co., Ltd. |
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| CX01 | Expiry of patent term |
Granted publication date: 20120815 |
|
| CX01 | Expiry of patent term |