CN107604897A - The reinforcement means that the vacuum preloading of soft soil foundation, air pressure splitting and grouting are combined - Google Patents
The reinforcement means that the vacuum preloading of soft soil foundation, air pressure splitting and grouting are combined Download PDFInfo
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- CN107604897A CN107604897A CN201710906690.0A CN201710906690A CN107604897A CN 107604897 A CN107604897 A CN 107604897A CN 201710906690 A CN201710906690 A CN 201710906690A CN 107604897 A CN107604897 A CN 107604897A
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- soft soil
- grouting
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- soil foundation
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Abstract
The invention discloses the reinforcement means that a kind of vacuum preloading of soft soil foundation, air pressure splitting and grouting are combined, including installation reinforced soft soil ground device：Wherein air pressure splitting pipeline and grout lines are combined into one, and share a vertical duct；Place ground settlement scope；System leak detection：Vacuumize and draw vacuum pressure time changing curve and ground settlement time graph；Air pressure cleaves；Vacuumize again；The steps such as grouting.After above-mentioned reinforcement means, air pressure in vacuum preloading can be cleaved pipeline and grout lines are combined into one, grouting is made full use of to be filled with pressure-air with compression system for deep soil, increase vacuum voids passage, grouting efficiency is improved, and then soft soil foundation intensity can be effectively improved, so need to only increase a little expense than simple vacuum grouting technique in actual applications, with regard to that can obtain much better soil strength consolidation effect, grout lines system therein can also reuse.
Description
Technical field
The present invention relates to the construction field of ultra-soft soft soil foundation, particularly a kind of vacuum preloading of soft soil foundation, air pressure are split
Split and be in the milk the reinforcement means being combined.
Background technology
The present invention is applied to the processing of ultra-soft muck foundation and hydraulic fill foundation, belongs to technical field of civil engineering.
At present, the method applied to treatment of soft foundation is a lot, and vacuum preloading grouting technique is one in reinforcing soft foundation and compared
Novel technology.Vacuum preloading grouting is divided into vacuum prepressing system and grouting system, and vacuum preloading grouting technique is soft in processing
Before base, the pore water of soft base is first extracted with vacuum prepressing system, makes to form a series of vacuum voids passage in soft base, then
Slurries are poured into soil with grouting system, slurries are distributed in soil along vacuum voids passage, reach the mesh for improving soft rheobase
's.However, in practice, vacuum voids passage deficiency, particularly relatively low in weak soil infiltration coefficient caused by vacuum prepressing system
In the case of interstitial channels be difficult to be formed, this just brings difficulty to grouting so that the consolidation effect of weak soil reduces.Therefore, find
One kind increase interstitial channels, improving the method for grouting efficiency has certain realistic meaning.
The content of the invention
It is true in view of the above-mentioned deficiencies of the prior art, the technical problem to be solved by the present invention is to provide a kind of soft soil foundation
The reinforcement means that empty precompressed, air pressure splitting and grouting are combined, the reinforcement means can overcome the disadvantages that the deficiencies in the prior art, and vacuum is pre-
Air pressure splitting pipeline and grout lines are combined into one in pressure, make full use of grouting to be filled with high pressure sky with compression system for deep soil
Gas, increase vacuum voids passage, improve grouting efficiency, and then soft soil foundation intensity can be effectively improved, so in practical application
It is middle only to increase a little expense than simple vacuum grouting technique, it is therein with regard to much better soil strength consolidation effect can be obtained
Grout lines system can also reuse.
In order to solve the above technical problems, the technical solution adopted by the present invention is：
The reinforcement means that a kind of vacuum preloading of soft soil foundation, air pressure splitting and grouting are combined, comprises the following steps：
The first step, reinforced soft soil ground device is installed：The peace of reinforced soft soil ground device is carried out on the soft soil foundation that need to be reinforced
Dress.
Second step, place ground settlement scope.
3rd step, system leak detection：By testing the seal of vertical duct, inspection grouting is close with compression system
Closing property；Vacuumized by examination, check the seal of vacuum prepressing system.
4th step, vacuumize and draw vacuum pressure-time changing curve and ground settlement-time graph：When the 3rd step
To complete, after the system seal of inspection meets the requirements, start to vacuumize, the water in pump drainage soft soil foundation is gentle, observation weak soil
The vacuum pressure and ground settlement of each depth of stratum in base, draw the vacuum pressure-time changing curve and ground of each depth of stratum
Table sedimentation-time changing curve.
5th step, air pressure splitting：After the vacuum pressure of each depth of stratum in the 4th step stablizes one week, open in triple valve
The valve being connected with air compressor, gases at high pressure are input in the soft soil foundation of middle lower floor by vertical duct.
6th step, is vacuumized again：By triple valve Close All, continue to vacuumize；Continue to observe various regions in soft soil foundation
The vacuum pressure and ground settlement of layer depth, and draw each depth of stratum vacuum pressure-time changing curve and ground settlement-
Time changing curve.
7th step, grouting：When obvious flex point, and vacuum occurs in the ground settlement drawn in the 6th step-time changing curve
When pressure versus time change curve is relatively stable, the valve being connected in triple valve with grouting equipment is opened, is in the milk, and after
Continuous vacuum pressure-the time changing curve for drawing each depth of stratum, when the vacuum pressure of understratum is close to zero, stop filling
Slurry, and wait slurries to condense.
8th step, as needed, repeat the 4th step to the 7th step；
9th step, construction terminate.
In the first step, the perforate in every vertical duct arranges that the diameter of each perforate is 3- in plum blossom-shaped
5mm。
In the first step, the installation method of reinforced soft soil ground device, comprise the following steps：
Step 1）, by vacuum method, sanding bed course sets vertical plastic draining board, lays Horizontal filter pipe.
Step 2）, laying is in the milk and compression system, wherein, grouting and the vertical duct in compression system, it is implanted in first
Walk the equidistant center of the vertical plastic draining board set.
Step 3）, pressure vacuum gauge is buried, encapsulant is laid on soft soil foundation surface, vavuum pump is installed.
The step 3）In, before laying encapsulant on soft soil foundation surface, first on the periphery of soft soil foundation to be reinforced
Vertical wax wall is set.
In the second step, ground settlement scope is settlement observation plate.
In 4th step and the 6th step, the observation week of the vacuum pressure of each depth of stratum and ground settlement in soft soil foundation
Phase be 24 hours once.
In 7th step, it is in the milk first, using the mode of infiltration, draws vacuum pressure-time change of each depth of stratum
Curve, when the vacuum pressure of understratum is close to zero, stop grouting, and wait slurries to condense.
After the present invention uses the above method, have the advantages that：
The present invention has organically combined air pressure splitting technique of soft soil foundation treatment and grouting technique, is extracted using the vavuum pump of vacuum system soft
Water in soil base is gentle, forms vacuum voids passage, recycles grout lines to be blown into gases at high pressure into soil to increase vacuum
The vacuum voids number of channels of the low deep soil layer of the quantity of interstitial channels, particularly infiltration coefficient, reduces the decay of vacuum.
Again in reasonable time, start to be in the milk further to improve soft soil foundation intensity in vacuum voids passage.And grouting channel
It is combined into one with filling channel, need to only increases a little expense than simple vacuum grouting technique in actual applications, but the soil body is strong
Degree can but improve a lot, and grout lines system therein can also reuse.
Brief description of the drawings
Fig. 1 is a kind of structural representation of reinforced soft soil ground device of the present invention.
Wherein have：1. vavuum pump；2. press mold ditch；3. Horizontal filter pipe；4. sand bedding course；5. vertical plastic draining board；It is 6. vertical
Pipe；7. horizontal branch pipe；8. house steward；9. triple valve；10. grouting equipment；11. air compressor.
Embodiment
The present invention is further detailed explanation with specific better embodiment below in conjunction with the accompanying drawings.
As shown in figure 1, a kind of reinforced soft soil ground device, including vacuum prepressing system and grouting and compression system.
Geotextiles and sand bedding course 4 are preferably equipped with the soft soil foundation that need to be reinforced, the periphery of soft soil foundation to be reinforced is excellent
Choosing is provided with vertical wax wall.
Vacuum prepressing system is connected including vavuum pump 1, the Horizontal filter pipe 3 being connected with vavuum pump 1, with Horizontal filter pipe 3
Vertical plastic draining board 5 and the pressure vacuum gauge that is embedded in soft soil foundation.
Grouting with compression system include a house steward 8, grouting equipment 10, air compressor 11, some horizontal branch pipees 7 and
Some vertical ducts 6.
Above-mentioned grouting equipment 10 and air compressor 11 are arranged on the end of house steward 8, the other end of house steward 8 by triple valve 9
Some horizontal branch pipees 7 are connected with, the other end of every horizontal branch pipe 7 is all connected with a vertical duct 6.
The middle and lower part of every vertical duct 6 is provided with several perforates, and perforate is preferably arranged in plum blossom-shaped, Mei Gekai
The diameter in hole is both preferably 3-5mm.
Further, one end that Horizontal filter pipe is connected with vertical plastic draining board, and horizontal branch pipe are connected with vertical duct
The one end connect is arranged in sand bedding course.
Further, vertical plastic draining board, which is parallel to each other, is laid in soft soil foundation, and vertical duct is uniformly arranged on adjacent two
In the symmetrical center line of the vertical plastic draining board of block.
The reinforcement means that a kind of vacuum preloading of soft soil foundation, air pressure splitting and grouting are combined, comprises the following steps.
The first step, reinforced soft soil ground device is installed.
The installation of reinforced soft soil ground device is carried out on the soft soil foundation that need to be reinforced, installation method, is preferably included following
Step：
Step 1）, by vacuum method, on the soft soil foundations that need to be reinforced, geotextiles and sand bedding course 4 are spread, sets vertical plastic row
Water plate 5, lay Horizontal filter pipe 3.
Step 2）, laying is in the milk and compression system：Away from vertical 5 equidistant center of the plastic draining board implantation in periphery
Vertical duct 6, the vertical duct 6 can have the effect of grouting and air guide concurrently.Then, lay horizontal branch pipe 7 and be connected with house steward 8, house steward 8
End triple valve 9 connects grouting equipment 10 and air compressor 11.
Step 3）, pressure vacuum gauge is buried, digs press mold ditch 2, vertical glue is set on the periphery of soft soil foundation to be reinforced
Native envelope wall, and encapsulant is laid on soft soil foundation surface, the encapsulant is preferably vacuum diaphragm, installs vavuum pump.
Second step, ground settlement scope is placed, the ground settlement scope is preferably settlement observation plate.
3rd step, system leak detection：By testing the seal of vertical duct, inspection grouting is close with compression system
Closing property；Vacuumized by examination, check the seal of vacuum prepressing system.
4th step, vacuumize and draw vacuum pressure-time changing curve and ground settlement-time graph：When the 3rd step
Complete, after the system seal of inspection meets the requirements, start to vacuumize, the water in pump drainage soft soil foundation is gentle, and 24 hours once
Be observed the vacuum pressure and ground settlement of each depth of stratum in soft soil foundation, draw each depth of stratum vacuum pressure-when
Between change curve and ground settlement-time changing curve.
5th step, air pressure splitting：After the vacuum pressure of each depth of stratum in the 4th step stablizes one week, open in triple valve
The valve being connected with air compressor, gases at high pressure are input in the soft soil foundation of middle lower floor by vertical duct.
6th step, is vacuumized again：By triple valve Close All, continue to vacuumize；Continue once to be observed for 24 hours
The vacuum pressure and ground settlement of each depth of stratum in soft soil foundation, and draw vacuum pressure-time change of each depth of stratum
Curve and ground settlement-time changing curve.
7th step, grouting：When obvious flex point, and vacuum occurs in the ground settlement drawn in the 6th step-time changing curve
When pressure versus time change curve is relatively stable, the valve being connected in triple valve with grouting equipment is opened, is in the milk, and after
Continuous vacuum pressure-the time changing curve for drawing each depth of stratum, when the vacuum pressure of understratum is close to zero, stop filling
Slurry, and wait slurries to condense；It is in the milk first, using the mode of infiltration, the vacuum pressure-time change for drawing each depth of stratum is bent
Line, when the vacuum pressure of understratum is close to zero, stop grouting, and wait slurries to condense.
8th step, as needed, repeat the 4th step to the 7th step.
9th step, construction terminate.
The preferred embodiment of the present invention described in detail above, still, the present invention are not limited in above-mentioned embodiment
Detail, in the range of the technology design of the present invention, a variety of equivalents can be carried out to technical scheme, this
A little equivalents belong to protection scope of the present invention.
Claims (7)
- A kind of 1. reinforcement means that vacuum preloading of soft soil foundation, air pressure cleave and grouting is combined, it is characterised in that：Including with Lower step：The first step, reinforced soft soil ground device is installed：The peace of reinforced soft soil ground device is carried out on the soft soil foundation that need to be reinforced Dress；Second step, place ground settlement scope；3rd step, system leak detection：By testing the seal of vertical duct, inspection grouting is closed with compression system Property；Vacuumized by examination, check the seal of vacuum prepressing system；4th step, vacuumize and draw vacuum pressure-time changing curve and ground settlement-time graph：When the 3rd step complete, After the system seal of inspection meets the requirements, start to vacuumize, the water in pump drainage soft soil foundation is gentle, observes each in soft soil foundation The vacuum pressure and ground settlement of depth of stratum, draw each depth of stratum vacuum pressure-time changing curve and ground settlement- Time changing curve；5th step, air pressure splitting：After the vacuum pressure of each depth of stratum in the 4th step stablizes one week, open triple valve in sky The valve that air compressor is connected, gases at high pressure are input in the soft soil foundation of middle lower floor by vertical duct；6th step, is vacuumized again：By triple valve Close All, continue to vacuumize；Continue to observe various regions layer depth in soft soil foundation The vacuum pressure and ground settlement of degree, and draw vacuum pressure-time changing curve and the ground settlement-time of each depth of stratum Change curve；7th step, grouting：When there is obvious flex point in the ground settlement drawn in the 6th step-time changing curve, and vacuum pressure- When time changing curve is relatively stable, the valve being connected in triple valve with grouting equipment is opened, is in the milk, and continue to draw Vacuum pressure-time changing curve of each depth of stratum, when the vacuum pressure of understratum is close to zero, stop grouting, and wait Treat that slurries condense；8th step, as needed, repeat the 4th step to the 7th step；9th step, construction terminate.
- The reinforcement means that 2. vacuum preloading of soft soil foundation according to claim 1, air pressure cleave and grouting is combined, its It is characterised by：Perforate in every vertical duct arranges that the diameter of each perforate is 3-5mm in plum blossom-shaped.
- The reinforcement means that 3. vacuum preloading of soft soil foundation according to claim 1, air pressure cleave and grouting is combined, its It is characterised by：In the first step, the installation method of reinforced soft soil ground device, comprise the following steps：Step 1）, by vacuum method, sanding bed course sets vertical plastic draining board, lays Horizontal filter pipe；Step 2）, laying is in the milk and compression system, wherein, grouting and the vertical duct in compression system, it is implanted in the first step and beats If vertical plastic draining board equidistant center；Step 3）, pressure vacuum gauge is buried, encapsulant is laid on soft soil foundation surface, vavuum pump is installed.
- The reinforcement means that 4. vacuum preloading of soft soil foundation according to claim 3, air pressure cleave and grouting is combined, its It is characterised by：The step 3）In, before laying encapsulant on soft soil foundation surface, first on the periphery of soft soil foundation to be reinforced Vertical wax wall is set.
- The reinforcement means that 5. vacuum preloading of soft soil foundation according to claim 1, air pressure cleave and grouting is combined, its It is characterised by：In the second step, ground settlement scope is settlement observation plate.
- The reinforcement means that 6. vacuum preloading of soft soil foundation according to claim 1, air pressure cleave and grouting is combined, its It is characterised by：In 4th step and the 6th step, the observation of the vacuum pressure and ground settlement of each depth of stratum in soft soil foundation Cycle be 24 hours once.
- The reinforcement means that 7. vacuum preloading of soft soil foundation according to claim 1, air pressure cleave and grouting is combined, its It is characterised by：In 7th step, it is in the milk first, using the mode of infiltration, draws vacuum pressure-time change of each depth of stratum Curve, when the vacuum pressure of understratum is close to zero, stop grouting, and wait slurries to condense.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710906690.0A CN107604897A (en) | 2017-09-28 | 2017-09-28 | The reinforcement means that the vacuum preloading of soft soil foundation, air pressure splitting and grouting are combined |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710906690.0A CN107604897A (en) | 2017-09-28 | 2017-09-28 | The reinforcement means that the vacuum preloading of soft soil foundation, air pressure splitting and grouting are combined |
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| CN107604897A true CN107604897A (en) | 2018-01-19 |
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| CN201710906690.0A Pending CN107604897A (en) | 2017-09-28 | 2017-09-28 | The reinforcement means that the vacuum preloading of soft soil foundation, air pressure splitting and grouting are combined |
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| CN108824113A (en) * | 2018-07-20 | 2018-11-16 | 四川瑞通工程建设集团有限公司 | A kind of soft-soil foundation treatment method |
| CN109339028A (en) * | 2018-10-24 | 2019-02-15 | 浙江大学宁波理工学院 | The soft clay processing unit and processing method of electric osmose joint cyclic microorganism slip casting |
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| CN109339028A (en) * | 2018-10-24 | 2019-02-15 | 浙江大学宁波理工学院 | The soft clay processing unit and processing method of electric osmose joint cyclic microorganism slip casting |
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