CN109653186B - Soft soil foundation treatment method combining local vacuum with high-pressure aerosol disturbance - Google Patents
Soft soil foundation treatment method combining local vacuum with high-pressure aerosol disturbance Download PDFInfo
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- CN109653186B CN109653186B CN201910051985.3A CN201910051985A CN109653186B CN 109653186 B CN109653186 B CN 109653186B CN 201910051985 A CN201910051985 A CN 201910051985A CN 109653186 B CN109653186 B CN 109653186B
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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
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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 discloses a soft soil foundation treatment method combining local vacuum with high-pressure aerosol disturbance, which is characterized in that a soft soil foundation treatment site is divided into a vacuum area and an air injection area which are distributed in a strip shape, vacuum preloading operation is carried out in the vacuum area, high-pressure aerosol disturbance operation is carried out in the air injection area, a transverse drainage channel is added in a soil body, water in the soft soil foundation is discharged through a vacuum sand cushion layer through the transverse drainage channel and a vertical drainage channel under vacuum negative pressure, meanwhile, the vacuum negative pressure greatly improves the injection radius and the influence range of the high-pressure aerosol in the air injection area, the drainage efficiency is improved, the power consumption is reduced, and the construction period is shortened.
Description
Technical Field
The invention belongs to the technical field of geotechnical engineering. In particular to a soft soil foundation treatment method, namely a soft soil foundation treatment method combining local vacuum with high-pressure aerosol disturbance.
Background
The soft soil is mostly distributed in the southeast coastal region in China, and the soft soil is divided into the following parts according to geological causes: coastal environment deposition, sea-land excess environment deposition (delta deposition), river environment deposition, lake environment deposition, and swamp environment deposition. With the production development and the increasing population density of the human society, more and more soft soil is used as the building foundation. When soft soil is used as a foundation or for other purposes, the soft soil needs to be reinforced, and because the soft soil has the properties of high water content, high porosity ratio, high flow plasticity and the like, a drainage consolidation method is a common foundation treatment method aiming at the projects. The principle is that the vertical drainage bodies such as sand wells or plastic drainage plates are arranged, so that pore water in soil layers is mainly drained from the horizontal direction through the vertical drainage bodies, the drainage way of the soil layers is increased, the drainage distance is shortened, drainage consolidation of soil bodies is accelerated under the action of load, the soil bodies are greatly settled in a short time, and the purposes of improving the strength of the soil bodies and reducing post-construction settlement are achieved.
Although the preloading (vacuum) preloading drainage consolidation method is a more economic and effective soft foundation treatment method, the method also has great limitations, which are mainly shown in that:
(1) deep soil body does not drain water: the additional stress generated by the stacking load is an exponential decreasing function along with the change of the depth, so that the effective treatment depth of the drainage consolidation method is not more than 10 m;
(2) the construction period is long: after the upper part stacking is finished, long-time pre-pressing is needed to meet the requirement of bearing capacity;
(3) the post-construction settlement is large: after construction, the deep soil body is compressed for a long time under the load action of the building, and creep settlement is generated.
(4) Horizontal drainage channels are not added: the drainage plate is a vertical drainage body, the sand cushion layer is a horizontal drainage body, and a horizontal drainage layer is not arranged in the underground soft soil.
(5) It is difficult to reinforce the drainage facility after the stacking. When the drainage plate is arranged and the sand cushion layer is paved, after the piling and loading are started, if the drainage facility is found to have problems, the difficulty is remedied.
Disclosure of Invention
The invention aims to provide a soft soil foundation treatment method combining local vacuum with high-pressure aerosol disturbance, and aims to solve the technical problems that deep soil bodies do not drain, the construction period is long, the post-construction settlement is large, a horizontal drainage channel is not increased, a drainage facility is difficult to reinforce after stacking and the like in a drainage consolidation and stacking preloading method in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
a soft soil foundation treatment method combining local vacuum with high-pressure aerosol disturbance comprises the following steps:
A. leveling the field, measuring and lofting: measuring and paying off a soft soil foundation to be treated according to the requirements in the technical Specification for treating building foundations, determining the treatment area, leveling the field, dividing a vacuum area and an air injection area which are in strip-shaped parallel distribution according to the field conditions, and ensuring that the width of a single strip in the vacuum area is not less than 10m and the width of a single strip in the air injection area is not less than 20 m;
B. arranging a vertical drainage channel: the top of the vacuum region drainage body is exposed out of the surface layer of the soft soil foundation, the top of the gas injection region drainage body is not higher than the surface layer of the soft soil foundation, and the drainage bodies are collectively called as a vertical drainage channel;
furthermore, the drainage body of the drainage body and the drainage body of the vacuum area play a role of pumping water in foundation soil from bottom to top to drain the water out of the ground surface, the top of the drainage body is higher than the ground surface and is embedded in the sand cushion layer, and when the drainage body is a plastic drainage plate, the transverse bending length of the end part in the sand cushion layer is not less than 50 cm;
further, the gas injection area drainage body is used for introducing water in the foundation soil into the transverse drainage channel from top to bottom under the vacuum action, and the height of the drainage body is not higher than the ground surface;
furthermore, the drainage bodies are plastic drainage plates or bagged sand wells, the drainage bodies are arranged in a triangular shape or a square shape, and the distance L between every two drainage bodies is 0.7-1.5 m; the deviation of the plane spacing of each drainage body is not more than the well diameter, and the deviation of the verticality is not more than +/-1.5%;
C. setting a cushion layer and a sealing groove: digging sealing ditches at the junction of the vacuum area and the gas injection area and around the field for sealing a subsequent vacuum film, and uniformly paving sand cushion layers on the surface layers of the vacuum area and the gas injection area and covering the top of the drainage body;
furthermore, the thickness of the sand cushion layer in the vacuum area is not less than 50cm, and the thickness of the sand cushion layer in the gas injection area is not less than 15 cm; the sand material of the sand cushion is medium coarse sand, the content of sticky particles is not more than 3 percent, and the dry density of the sand cushion is not more than 1.5t/m3Permeability coefficient of not less than 1 x 10-2cm/s；
Furthermore, the sealing ditch also has the function of a drainage ditch, the depth of the sealing ditch is not less than 1m, the sealing backfill height of the sealing ditch is not higher than the top elevation of the sand cushion layer of the gas injection area, and the height difference is not less than 30 cm;
D. laying a vacuum film: fully laying a vacuum film in the field, and isolating the ground surfaces of the vacuum area and the gas injection area from each other through a sealing ditch;
furthermore, the vacuum film is suitable for being laid in three layers, double heat and seams are adopted during the overlapping of the films, and the overlapping width is not less than 15 mm.
E. Vacuumizing a vacuum area: performing continuous vacuum-pumping construction in a vacuum area through a vacuum pump to generate negative pressure under the vacuum film, wherein the vacuum degree under the vacuum film of the vacuum prepressing after stabilization is not less than 86.7 kPa;
further, the vacuumizing operation is continuous operation until the foundation treatment is finished, and the period of time cannot be interrupted;
further, the vacuum pumping force of the vacuum pump is not less than 95kPa, and the vacuum degree under the film is stably kept in a range of not less than 86.7 kPa;
F. gas injection in a gas injection area: after the vacuum degree under the membrane of the vacuum area is not less than 86.7kPa and the negative pressure under the membrane is fully transferred in the drainage body and the soil body, spraying high-pressure aerosol into the soil body of the gas injection area through a high-pressure aerosol generating device and a spraying guide pipe to cut the soil body, and forming a transverse drainage channel in the soil body;
further, the length of the jet conduit is not more than the depth of the drainage body embedded in the soil body;
furthermore, when aerosol is sprayed, the two spraying ranges need to be overlapped to a certain extent, and the complete spraying of the whole spraying area is ensured;
further, the aerosol formed in the aerosol generating device is subjected to high-pressure spraying and soil body cutting in the soil body of the gas injection area through the spraying guide pipe under the action of pressure, after the spraying design range and the spraying design time are reached, the spraying guide pipe is lifted upwards to the next design depth for continuous spraying, and the spraying is carried out section by section from low to high until all the spraying operation is finished;
G. and continuously vacuumizing until the construction is finished.
Compared with the prior art, the method of the invention has the following advantages:
the invention divides the soft soil foundation treatment field into a vacuum area and an air injection area which are distributed among strips, carries out vacuum preloading operation in the vacuum area, carries out high-pressure aerosol disturbance operation in the air injection area, and adds a horizontal drainage channel in the soil body, water in the soft soil foundation is discharged through a vacuum sand cushion layer through the horizontal drainage channel and a vertical drainage channel under vacuum negative pressure, and simultaneously, the vacuum negative pressure greatly improves the injection radius and the influence range of the high-pressure aerosol in the air injection area, reduces the power consumption while improving the drainage efficiency, and saves the energy.
(1) The drainage efficiency is high, the time limit for a project is short: compared with the traditional preloading (vacuum) method, the method has the advantages that the high-pressure aerosol is sprayed into the soil body of the soft soil foundation through the high-pressure aerosol generating device and the spraying guide pipe, so that the soil property is improved, the permeability coefficient of the soft soil is increased, the strength of the soil body is improved, the transverse drainage channel is formed, the drainage distance is shortened, the pore pressure of the soil body in the influence range is increased, the chimney effect is formed by the aerosol spraying radius and the negative pressure under the film of the vacuum area, the traditional passive drainage is converted into active drainage, the drainage efficiency is greatly improved, and the construction period is effectively shortened.
(2) Low cost, low energy consumption and high efficacy: on one hand, the soft soil foundation to be treated is divided into a vacuum area and a gas injection area which are in parallel distribution in a strip shape, vacuumizing operation is carried out in the vacuum area, and high-pressure aerosol injection operation is carried out in the gas injection area; on the other hand, the soft soil foundation to be treated is divided into the vacuum area and the gas injection area which are in parallel distribution in a strip shape, the influence range of vacuum preloading of the vacuum area is fully utilized (the transmission of the vacuum degree under the film has a certain influence range during vacuumizing, and the vacuum negative pressure can be generated in soil bodies in a certain range outside an operation field under the influence of the vacuum preloading), under the action of the pressure difference of holes of the soil bodies in the vacuum area and the soil bodies in the gas injection area, the jet radius and the influence range of high-pressure aerosol in the method are larger under the same power, and the construction efficiency is greatly improved.
Drawings
FIG. 1 is a schematic diagram of the field vacuum and gas injection zones of the present invention;
FIG. 2 is a schematic diagram of the method of the present invention;
numbering in the figures: 1-a drainage body; 2-a sand cushion layer; 3-sealing the groove; 4-vacuum film; 5-a vacuum pump; 6-aerosol generating means; 7-a jet duct; 8-vacuum area; 9-gas injection zone; 10-spray range.
Detailed Description
The invention relates to a soft soil foundation treatment method combining local vacuum with high-pressure aerosol disturbance, which comprises the following steps:
A. leveling the field, measuring and lofting: measuring and paying off a soft soil foundation to be treated according to the requirements in the technical Specification for treating building foundations, determining the treatment area, leveling the field, dividing a vacuum area and an air injection area which are in strip-shaped parallel distribution according to the field conditions, and ensuring that the width of a single strip in the vacuum area is not less than 10m and the width of a single strip in the air injection area is not less than 20 m;
B. arranging a vertical drainage channel: the top of the vacuum region drainage body is exposed out of the surface layer of the soft soil foundation, the top of the gas injection region drainage body is not higher than the surface layer of the soft soil foundation, and the drainage bodies are collectively called as a vertical drainage channel;
furthermore, the drainage body of the drainage body and the drainage body of the vacuum area play a role of pumping water in foundation soil from bottom to top to drain the water out of the ground surface, the top of the drainage body is higher than the ground surface and is embedded in the sand cushion layer, and when the drainage body is a plastic drainage plate, the transverse bending length of the end part in the sand cushion layer is not less than 50 cm;
further, the gas injection area drainage body is used for introducing water in the foundation soil into the transverse drainage channel from top to bottom under the vacuum action, and the height of the drainage body is not higher than the ground surface;
furthermore, the drainage bodies are plastic drainage plates or bagged sand wells, the drainage bodies are arranged in a triangular shape or a square shape, and the distance L between every two drainage bodies is 0.7-1.5 m; the deviation of the plane spacing of each drainage body is not more than the well diameter, and the deviation of the verticality is not more than +/-1.5%;
C. setting a cushion layer and a sealing groove: digging sealing ditches at the junction of the vacuum area and the gas injection area and around the field for sealing a subsequent vacuum film, and uniformly paving sand cushion layers on the surface layers of the vacuum area and the gas injection area and covering the top of the drainage body;
furthermore, the thickness of the sand cushion layer in the vacuum area is not less than 50cm, and the thickness of the sand cushion layer in the gas injection area is not less than 15 cm; the sand material of the sand cushion is medium coarse sand, the content of sticky particles is not more than 3 percent, and the dry density of the sand cushion is not more than 1.5t/m3Permeability coefficient of not less than 1 x 10-2cm/s；
Furthermore, the sealing ditch also has the function of a drainage ditch, the depth of the sealing ditch is not less than 1m, the sealing backfill height of the sealing ditch is not higher than the top elevation of the sand cushion layer of the gas injection area, and the height difference is not less than 30 cm;
D. laying a vacuum film: fully laying a vacuum film in the field, and isolating the ground surfaces of the vacuum area and the gas injection area from each other through a sealing ditch;
furthermore, the vacuum film is suitable for being laid in three layers, double heat and seams are adopted during the overlapping of the films, and the overlapping width is not less than 15 mm.
E. Vacuumizing a vacuum area: performing continuous vacuum-pumping construction in a vacuum area through a vacuum pump to generate negative pressure under the vacuum film, wherein the vacuum degree under the vacuum film of the vacuum prepressing after stabilization is not less than 86.7 kPa;
further, the vacuumizing operation is continuous operation until the foundation treatment is finished, and the period of time cannot be interrupted;
further, the vacuum pumping force of the vacuum pump is not less than 95kPa, and the vacuum degree under the film is stably kept in a range of not less than 86.7 kPa;
F. gas injection in a gas injection area: after the vacuum degree under the membrane of the vacuum area is not less than 86.7kPa and the negative pressure under the membrane is fully transferred in the drainage body and the soil body, spraying high-pressure aerosol into the soil body of the gas injection area through a high-pressure aerosol generating device and a spraying guide pipe to cut the soil body, and forming a transverse drainage channel in the soil body;
further, the length of the jet conduit is not more than the depth of the drainage body embedded in the soil body;
furthermore, when aerosol is sprayed, the two spraying ranges need to be overlapped to a certain extent, and the complete spraying of the whole spraying area is ensured;
further, the aerosol formed in the aerosol generating device is subjected to high-pressure spraying and soil body cutting in the soil body of the gas injection area through the spraying guide pipe under the action of pressure, after the spraying design range and the spraying design time are reached, the spraying guide pipe is lifted upwards to the next design depth for continuous spraying, and the spraying is carried out section by section from low to high until all the spraying operation is finished;
G. and continuously vacuumizing until the construction is finished.
The technical solution of the present invention is further explained below with reference to the accompanying drawings, but the present invention is not limited to the following description:
measuring and paying off the soft soil foundation to be treated according to the requirements in the technical Specification for treating building foundation (JGJ 79-2012), determining the treatment area, leveling the field, and dividing the soft soil foundation into strips according to the field conditionsThe shape of the vacuum area and the gas injection area are distributed in parallel, as shown in figure 1, and the dotted circle line in figure 1 is the action range of the aerosol. Wherein the width of the vacuum area is not less than 10m, and the width of the gas injection area is not less than 20 m; vertically driving drainage bodies (1) serving as vertical drainage channels into the field of the divided area, wherein the drainage bodies (1) are distributed in the whole field, the drainage bodies are arranged in a triangular shape or a square shape, the distance L between every two drainage bodies is 0.7-1.5m, the end part of the drainage body (1) in the vacuum area is not less than 50cm higher than the ground, and the end part of the drainage body (1) in the gas injection area is not higher than the ground; after the vertical drainage channel is arranged, a sand cushion layer (2) is paved in the field, and a sealing ditch (3) is dug around the vacuum area, wherein the content of the sand cushion layer is not more than 3% by the content of sticky particles, and the dry density of the sand cushion layer is not more than 1.5t/m3Permeability coefficient of not less than 1 x 10-2The medium coarse sand of cm/s is used as sand, wherein the thickness of the sand cushion layer (2) in the vacuum area is not less than 50cm, and the thickness of the sand cushion layer (2) in the gas injection area is not less than 15 cm; after the sand cushion layer (2) is laid, a vacuum film (4) is fully laid in the field, the ground surfaces of the vacuum area and the gas injection area are isolated from each other through a sealing ditch (3), wherein the backfill height of the sealing ditch (3) is smaller than the top elevation of the sand cushion layer in the gas injection area and is also used as a drainage ditch; after the above-mentioned processes are completed, the vacuum-pumping operation is implemented in the vacuum zone by means of vacuum pump (5), when the vacuum degree under the film is not less than 86.7kPa, high-pressure aerosol is sprayed into soil mass of a gas injection area through a high-pressure aerosol generating device (6) and a spraying conduit (7), wherein the length of the spray conduit (7) is not more than the depth of the drainage body (1) embedded in the soil body, the aerosol formed in the high-pressure aerosol generating device (6) is sprayed and cut the soil body in the gas injection area soil body at high pressure through the spray conduit (7) under the action of pressure, after the design range and the design time of spraying are reached, lifting the jet pipe to the next designed depth for continuous jet, jetting from low to high section by section until all jet operation is completed, and when the aerosol is jetted, it is necessary to ensure that the two spray ranges (as shown in fig. 2) need to have a certain overlap to ensure that the whole spray area is completely sprayed. The gas injection area can be sprayed with high-pressure aerosol once or for multiple times as required, the high-pressure aerosol is continuously vacuumized after the spraying is finished, and the vacuum degree under the film is kept to be not less than 86.7kPa until the construction is finished.
The above examples are only for illustrating the technical concept and features of the present invention, and are not intended to limit the scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (10)
1. A soft soil foundation treatment method combining local vacuum with high-pressure aerosol disturbance is characterized by comprising a vacuum area and a gas injection area which are distributed in a strip-shaped staggered manner, wherein the vacuum area is subjected to local vacuum preloading, the gas injection area is subjected to high-pressure aerosol disturbance, and the vacuum negative pressure of the vacuum area is utilized to improve the action range of the aerosol in the gas injection area and reduce energy consumption;
the method comprises the following steps:
A. leveling the field, measuring and lofting: measuring and setting out a soft soil foundation to be treated according to the requirements in the technical Specification for treating building foundations, determining the treatment area, leveling the field, and dividing the ranges of a vacuum area and a gas injection area according to the field conditions;
B. arranging a vertical drainage channel: the method comprises the following steps that a whole field is fully distributed with vertical drainage bodies (1), the top of each vacuum area drainage body (1) is exposed out of the surface layer of the soft soil foundation, the top of each gas injection area drainage body (1) is not higher than the ground surface, and the drainage bodies (1) are collectively called as vertical drainage channels;
C. setting a cushion layer and a sealing groove (3): digging sealing ditches (3) at the junction of the vacuum area and the gas injection area and around the field for sealing a subsequent vacuum film (4), and uniformly paving sand cushions (2) on the surface layers of the vacuum area and the gas injection area and covering the top of the drainage body (1);
D. laying a vacuum film (4): a vacuum film (4) is fully paved in the field, and the ground surfaces of the vacuum area and the gas injection area are isolated from each other through a sealing ditch (3);
E. vacuumizing a vacuum area: continuously vacuumizing in a vacuum area through a vacuum pump (5) to generate negative pressure under a vacuum film (4), wherein the vacuum degree under the vacuum film subjected to vacuum preloading after stabilization is not less than 86.7 kPa;
F. gas injection in a gas injection area: after the vacuum degree under the membrane of the vacuum area is not less than 86.7kPa and the negative pressure under the membrane is fully transferred in the drainage body (1) and the soil body, high-pressure aerosol is sprayed into the soil body of the gas injection area through a high-pressure aerosol generating device (6) and a spraying conduit (7) to cut the soil body, and a transverse drainage channel is formed in the soil body;
G. and continuously vacuumizing until the construction is finished.
2. A soft soil foundation treatment method combining partial vacuum and high-pressure aerosol disturbance according to claim 1, characterized in that in the step A, the vacuum area and the gas injection area are distributed in parallel in a strip shape; the width of the single strip in the vacuum area is not less than 10m, and the width of the single strip in the gas injection area is not less than 20 m.
3. A soft soil foundation treatment method combining partial vacuum and high pressure aerosol disturbance according to claim 1, characterized in that, in the step B, the drainage bodies (1) are arranged in a triangle or square shape, and the distance L between the drainage bodies (1) is 0.7-1.5 m; the drainage body (1) is a plastic drainage plate or a bagged sand well; the diameter d of the bagged sand wellw70 mm-120 mm; the diameter of the plastic drainage plate is equivalent diameter dp，dp2(b +)/pi, wherein b is the width of the plastic drainage plate and the thickness of the plastic drainage plate; the deviation of the plane spacing of each drainage body (1) is not more than the well diameter, and the deviation of the verticality is not more than +/-1.5%.
4. A soft soil foundation treatment method combining partial vacuum and high pressure aerosol disturbance according to claim 1, characterized in that, in the step B, the drainage body (1) in the vacuum area and the drainage body (1) in the vacuum area act to draw water in the foundation soil from bottom to top to drain the water out of the ground surface, the top of the drainage body is higher than the ground surface and is embedded in the sand cushion layer (2), and when the drainage body (1) is a plastic drainage plate, the transverse bending length of the end part in the sand cushion layer (2) is not less than 50 cm; the gas injection area drainage body (1) is used for introducing water in foundation soil into the transverse drainage channel from top to bottom under the action of vacuum, and the height of the drainage body is not higher than the ground surface.
5. A soft soil foundation treatment method combining partial vacuum and high pressure aerosol disturbance according to claim 1, characterized in that in step C, vacuum is adoptedThe thickness of the sand cushion layer (2) in the area is not less than 50cm, and the thickness of the sand cushion layer (2) in the gas injection area is not less than 15 cm; the sand material of the sand cushion layer (2) is medium coarse sand, the content of sticky particles is not more than 3 percent, and the dry density of the sand cushion layer (2) is not more than 1.5t/m3Permeability coefficient of not less than 1 x 10-2cm/s。
6. A soft soil foundation treatment method combining partial vacuum and high pressure aerosol disturbance according to claim 1, characterized in that, in the step C, the sealing ditch (3) also has the function of a drainage ditch, the depth of the sealing ditch is not less than 1m, the sealing backfill height of the sealing ditch (3) is not higher than the top elevation of the sand cushion layer (2) in the gas injection area, and the height difference is not less than 30 cm.
7. A soft soil foundation treatment method combining partial vacuum and high pressure aerosol disturbance according to claim 1, characterized in that in step D, the vacuum membrane (4) is preferably laid with three layers, double heating and seam are adopted during the lap joint between membranes, and the lap joint width is not less than 15 mm.
8. A soft soil foundation treatment method combining partial vacuum and high-pressure aerosol disturbance according to claim 1, wherein in the step E, the vacuumizing operation is an uninterrupted continuous operation until the foundation treatment is finished; the vacuum suction force of the vacuum pump (5) is not less than 95kPa, and the vacuum degree under the film is stably kept in a range of not less than 86.7 kPa.
9. A soft soil foundation treatment method combining partial vacuum and high pressure aerosol disturbance according to claim 1, characterized in that, in step F, the length of the injection conduit (7) is not more than the depth of the drainage body (1) embedded in the soil body; the aerosol formed in the aerosol generating device is subjected to high-pressure spraying and soil body cutting in the soil body of the gas injection area through the spraying pipe (7) under the action of pressure, after the spraying design range and the spraying design time are reached, the spraying pipe (7) is lifted upwards to the next design depth for continuous spraying, and the spraying is carried out section by section from low to high until all the spraying operations are completed.
10. A soft soil foundation treatment method combining partial vacuum and high-pressure aerosol disturbance according to claim 1, characterized in that in step F, when the aerosol is sprayed, a certain overlap of two spraying ranges is required to ensure that the whole spraying area is completely sprayed.
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| CN103255761A (en) * | 2012-02-16 | 2013-08-21 | 同济大学 | Method for reinforcing soft soil foundation by using calescence type vacuum preloading way |
| CN104895046A (en) * | 2015-06-04 | 2015-09-09 | 浙江开天工程技术有限公司 | Soft-soil foundation treatment method combining disturbance at different depths with drainage consolidation |
| CN106677156A (en) * | 2016-12-27 | 2017-05-17 | 吴慧明 | Method for conducting disturbance treatment on soft soil foundation through aerosol |
| CN106869109A (en) * | 2017-03-30 | 2017-06-20 | 吴慧明 | A kind of aerosol generating device supporting for soft soil foundation disturbance treatment operation |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103255761A (en) * | 2012-02-16 | 2013-08-21 | 同济大学 | Method for reinforcing soft soil foundation by using calescence type vacuum preloading way |
| CN104895046A (en) * | 2015-06-04 | 2015-09-09 | 浙江开天工程技术有限公司 | Soft-soil foundation treatment method combining disturbance at different depths with drainage consolidation |
| CN106677156A (en) * | 2016-12-27 | 2017-05-17 | 吴慧明 | Method for conducting disturbance treatment on soft soil foundation through aerosol |
| CN106869109A (en) * | 2017-03-30 | 2017-06-20 | 吴慧明 | A kind of aerosol generating device supporting for soft soil foundation disturbance treatment operation |
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