CN110331710B - Port large-area ultra-soft soil foundation treatment method - Google Patents
Port large-area ultra-soft soil foundation treatment method Download PDFInfo
- Publication number
- CN110331710B CN110331710B CN201910549321.XA CN201910549321A CN110331710B CN 110331710 B CN110331710 B CN 110331710B CN 201910549321 A CN201910549321 A CN 201910549321A CN 110331710 B CN110331710 B CN 110331710B
- Authority
- CN
- China
- Prior art keywords
- central cylinder
- soft soil
- soil foundation
- main pipe
- ultra
- Prior art date
- 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.)
- Active
Links
Images
Classifications
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Agronomy & Crop Science (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a method for treating a large-area ultra-soft soil foundation of a port, which comprises the following steps: firstly, paving a sand cushion layer above the ultra-soft soil foundation; vertically arranging a plurality of groups of drainage pipes in the ultra-soft soil foundation, wherein each group of drainage pipes comprises a plurality of drainage pipes which are annularly distributed; step three, vertically drilling a central cylinder at the center of each group of drain pipes, coaxially arranging a rotating shaft in the central cylinder, wherein the rotating shaft is supported by two bearing seats, and an eccentric wheel is fixed on the rotating shaft; fourthly, digging an annular sealing ditch at the periphery of each group of drainage pipes, and then paving sealing films above the sand cushion layers and in the sealing ditches; connecting the upper end of the main pipe to a vacuum pump through a connecting pipe, performing a vacuumizing process, and connecting the rotating shaft with a motor to enable the rotating shaft and the eccentric wheel to rotate; and step six, after the vacuumizing treatment process is finished, removing the sealing film, the connecting pipe and the motor. The invention can improve the drainage speed and reduce the possibility of blockage of the drainage pipe.
Description
Technical Field
The invention relates to a foundation construction method. More particularly, the invention relates to a method for treating a large-area ultra-soft soil foundation of a port.
Background
The ultra-soft soil foundation has the characteristics of high water content, low strength and the like, and is generally treated by a vacuum preloading method at present. However, the drainage speed of the existing vacuum preloading method is low, and the drainage plate is easy to block along with the increase of the construction time, so that the later drainage capability is influenced. Therefore, it is desirable to provide a method for treating ultra-soft soil foundation, which can overcome the above defects to some extent.
Disclosure of Invention
An object of the present invention is to provide a method for treating a harbor large-area ultra-soft soil foundation, which can increase the drainage speed and reduce the possibility of clogging of a drainage pipe.
To achieve these objects and other advantages in accordance with the present invention, there is provided a harbor large-area ultra-soft soil foundation treatment method, comprising:
firstly, paving a sand cushion layer above the ultra-soft soil foundation;
vertically arranging a plurality of groups of drain pipes in the ultra-soft soil foundation, wherein each group of drain pipes comprises a plurality of drain pipes distributed annularly, each drain pipe comprises a main pipe and a plurality of wing plates, a plurality of first openings are formed in the side wall of the main pipe, the first openings are strip-shaped and extend along the axial direction of the main pipe, hollow cavities are formed in the wing plates, second openings communicated with the hollow cavities are formed in one sides of the wing plates, the wing plates are fixed at the first openings and enable the first openings to be communicated with the second openings, fish scale holes communicated with the hollow cavities are distributed in the surfaces of the wing plates, and the openings of the fish scale holes face the upper end of the main pipe;
vertically drilling a central cylinder at the center of each group of drain pipes, wherein the lower end of the central cylinder is closed, two bearing seats are arranged in the central cylinder at intervals up and down, a rotating shaft is coaxially arranged in the central cylinder and supported by the two bearing seats, and an eccentric wheel is further fixed on the rotating shaft;
fourthly, digging an annular sealing ditch at the periphery of each group of drainage pipes, and then paving sealing films above the sand cushion layers and in the sealing ditches;
connecting the upper end of the main pipe to a vacuum pump through a connecting pipe, performing a vacuumizing process, and connecting the rotating shaft with a motor to enable the rotating shaft and the eccentric wheel to rotate;
and step six, after the vacuumizing treatment process is finished, removing the sealing film, the connecting pipe and the motor, and grouting into the drainage pipe and the central cylinder.
Preferably, in the method for processing a large-area ultra-soft soil foundation for a port, the plurality of first openings are symmetrically distributed on the side wall of the main pipe, the thickness of the wing plate is reduced in sequence from the approach of the main pipe to the distance of the main pipe, and the width of the wing plate is reduced in sequence from the approach of the main pipe to the distance of the main pipe.
Preferably, in the method for treating the large-area ultra-soft soil foundation of the port, the hollow cavity is filled with geotextile.
Preferably, in the method for treating the large-area ultra-soft soil foundation of the port, the main pipe and the central cylinder extend out of the sand cushion layer, an annular groove is dug around the central cylinder, and a sealing film is laid in the annular groove.
Preferably, the method for processing the large-area ultra-soft soil foundation of the port further comprises the following steps:
and a connecting rod is arranged, one end of the connecting rod is fixed with the central cylinder, and the other end of the connecting rod is fixed with the main pipe.
Preferably, in the method for treating the large-area ultra-soft soil foundation of the port, the distance between the central cylinder and the main pipes is 10-15 times of the diameter of the central cylinder, and the distance between two adjacent main pipes is not more than 4-5 times of the length of the wing plate.
The invention at least comprises the following beneficial effects:
the drainage pipes are arranged in an annular mode, the center cylinder is arranged in the center, the drainage pipes are connected with the vacuum pump, water and gas in the ultra-soft soil foundation are sucked, the center cylinder is driven to vibrate by the motor in the suction process, the water in the foundation is promoted to move to the surrounding drainage pipes, and the drainage capacity is improved. The vibration of the central cylinder is transmitted to the drain pipe, so that the possibility of blocking scale holes in the drain pipe is reduced, and the drainage capacity is maintained. After the pumping process is finished, the drain pipe and the central cylinder are left in the ultra-soft soil foundation to assist in improving the strength of the foundation.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the structure of the drain pipe of the present invention;
fig. 3 is a top view of the present invention.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
In one embodiment, as shown in fig. 1, 2 and 3, a method for processing a large-area ultra-soft soil foundation in a port includes:
firstly, paving a sand cushion layer 1 above an ultra-soft soil foundation;
vertically arranging a plurality of groups of drain pipes 4 in the ultra-soft soil foundation, wherein each group of drain pipes 4 comprises a plurality of drain pipes 4 which are distributed annularly, each drain pipe 4 comprises a main pipe and a plurality of wing plates 401, a plurality of first openings are formed in the side wall of each main pipe, each first opening is in a strip shape and extends along the axial direction of each main pipe, a hollow cavity is formed inside each wing plate 401, a second opening communicated with the hollow cavity is formed in one side of each wing plate 401, each wing plate 401 is fixed at the corresponding first opening and enables the corresponding first opening to be communicated with the corresponding second opening, scale holes 402 communicated with the hollow cavity are distributed in the surface of each wing plate 401, and the opening of each scale hole 402 faces the upper end of each main pipe;
step three, vertically drilling a central cylinder 5 at the center of each group of drain pipes 4, sealing the lower end of the central cylinder 5, arranging two bearing seats 502 at intervals up and down in the central cylinder 5, coaxially arranging a rotating shaft 501 in the central cylinder 5, supporting the rotating shaft 501 by the two bearing seats 502, and fixing an eccentric wheel 503 on the rotating shaft 501;
fourthly, digging an annular sealing ditch 2 at the periphery of each group of drain pipes 4, and then paving sealing films 3 above the sand cushion layer 1 and in the sealing ditches 2;
connecting the upper ends of the main pipes to a vacuum pump 6 through connecting pipes, performing a vacuumizing process, and connecting the rotating shaft 501 with a motor 504 to enable the rotating shaft 501 and the eccentric wheel 503 to rotate;
and step six, after the vacuumizing process is finished, removing the sealing film 3, the connecting pipe and the motor 504, and grouting into the water drainage pipe 4 and the central cylinder 5.
In the technical scheme, aiming at the defect that the drainage plate inserted into the ultra-soft soil foundation by the existing vacuum preloading method is easy to block, the drainage pipe 4 is annularly arranged, then the center cylinder 5 capable of generating vibration is arranged in the center, and in the process of pumping, the vibration of the center cylinder 5 is utilized to provide drainage speed and reduce the possibility of blocking of the drainage pipe 4. Firstly, laying a sand cushion layer 1 above an ultra-soft soil foundation, then arranging a drain pipe 4 and a central cylinder 5, wherein the drain pipe 4 is arranged around the central cylinder 5, namely dividing the large-area ultra-soft soil foundation of the whole port into small units by using a plurality of groups of drain pipes 4; then digging sealing ditches 2 around the periphery of each group of water discharge pipes 4, and covering the sand cushion layer 1 and the sealing ditches 2 with sealing films 3; then, a vacuum pump 6, a connecting pipe and a motor 504 are arranged for pumping and vibrating to finish the drainage process; and finally, the connecting pipe and the motor 504 are dismantled, and grouting is performed in the water discharge pipe 4 and the central cylinder 5 for reinforcing the subsequent ultra-soft soil foundation. The drain pipe 4 comprises a main pipe and a wing plate 401, the wing plate 401 is unfolded and arranged around the main pipe, the area of the wing plate 401 is large, the scale holes 402 are distributed in the surface, water can conveniently enter the scale holes 402, the openings of the scale holes 402 are upward, and therefore the situation that sludge blocks the scale holes 402 when the drain pipe 4 is arranged is avoided. A rotatable rotating shaft 501 is arranged in the central cylinder 5, the rotating shaft 501 is driven by a motor 504, an eccentric wheel 503 is further arranged on the rotating shaft 501, and when the rotating shaft 501 is driven by the motor 504, the eccentric wheel 503 also rotates, so that the central cylinder 5 generates vibration integrally. The diameter of the central cylinder 5 and the distance between the central cylinder 5 and the drain pipe 4 are reasonably set, so that the vibration of the central cylinder 5 can be transmitted to the drain pipe 4, pressure is applied to water in the ultra-soft soil foundation, the water is promoted to enter the drain pipe 4, the soil body near the drain pipe 4 vibrates, and the blocking of the scale holes 402 is reduced to a certain degree. It can be seen that the technical scheme can improve and maintain the drainage capacity of the vacuum preloading method.
In another technical scheme, in the method for processing the large-area ultra-soft soil foundation of the port, the first openings are symmetrically distributed on the side wall of the main pipe, the thickness of the wing plate 401 is reduced from being close to the main pipe to being far away from the main pipe, and the width of the wing plate 401 is reduced from being close to the main pipe to being far away from the main pipe. Here, the wing plates 401 are made to be in a spike shape, the wing plates 401 are inserted into the ground, and the wing plates 401 are symmetrically spread and distributed on both sides of the main pipe, so that water brought by vibration of the central cylinder 5 can be conveniently received.
In another technical scheme, in the method for treating the large-area ultra-soft soil foundation of the port, the hollow cavity is filled with geotechnical fibers. Here, the geotextile has water permeability, and reduces mud from entering the main pipe.
In another technical scheme, in the method for processing the large-area ultra-soft soil foundation of the port, the main pipe and the central cylinder 5 extend out of the sand cushion layer 1, an annular groove 101 is dug around the central cylinder 5, and a sealing film 3 is laid in the annular groove 101. Here, the wing plate 401 is positioned in the ultra-soft soil foundation, the annular groove 101 is dug around the portion of the central cylinder 5 extending out of the sand cushion layer 1, and the sealing film 3 is laid in the annular groove 101, thereby improving the overall sealing performance.
In another technical solution, the method for processing a large-area ultra-soft soil foundation in a port further includes:
a connecting rod is arranged, one end of the connecting rod is fixed with the central cylinder 5, and the other end of the connecting rod is fixed with the main pipe. Here, a connecting rod may be provided between the center cylinder 5 and the main pipe in an overlapping manner for transmitting vibration of the center cylinder 5 to the main pipe, promoting vibration of the soil around the wing plates 401, and reducing the possibility of clogging of the scale holes 402.
In another technical scheme, in the method for treating the large-area ultra-soft soil foundation of the port, the distance between the central cylinder 5 and the main pipes is 10-15 times of the diameter of the central cylinder 5, and the distance between two adjacent main pipes is not more than 4-5 times of the length of the wing plate 401. Here, an arrangement of the central cartridge 5 and the main tube is provided so that the central cartridge 5 can better transmit vibrations to the main tube.
The number of apparatuses and the scale of the process described herein are intended to simplify the description of the present invention. The application, modification and variation of the method for treating a large-area ultra-soft soil foundation in a harbor of the present invention will be apparent to those skilled in the art.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (6)
1. The method for processing the large-area ultra-soft soil foundation of the port is characterized by comprising the following steps of:
firstly, paving a sand cushion layer above the ultra-soft soil foundation;
vertically arranging a plurality of groups of drain pipes in the ultra-soft soil foundation, wherein each group of drain pipes comprises a plurality of drain pipes distributed annularly, each drain pipe comprises a main pipe and a plurality of wing plates, a plurality of first openings are formed in the side wall of the main pipe, the first openings are strip-shaped and extend along the axial direction of the main pipe, hollow cavities are formed in the wing plates, second openings communicated with the hollow cavities are formed in one sides of the wing plates, the wing plates are fixed at the first openings and enable the first openings to be communicated with the second openings, fish scale holes communicated with the hollow cavities are distributed in the surfaces of the wing plates, and the openings of the fish scale holes face the upper end of the main pipe;
vertically drilling a central cylinder at the center of each group of drain pipes, wherein the lower end of the central cylinder is closed, two bearing seats are arranged in the central cylinder at intervals up and down, the two bearing seats are fixed on the inner wall of the central cylinder, a rotating shaft is coaxially arranged in the central cylinder and supported by the two bearing seats, and an eccentric wheel is further fixed on the rotating shaft;
fourthly, digging an annular sealing ditch at the periphery of each group of drainage pipes, and then paving sealing films above the sand cushion layers and in the sealing ditches;
connecting the upper end of the main pipe to a vacuum pump through a connecting pipe, performing a vacuumizing process, and connecting the rotating shaft with a motor to enable the rotating shaft and the eccentric wheel to rotate;
and step six, after the vacuumizing treatment process is finished, removing the sealing film, the connecting pipe and the motor, and grouting into the drainage pipe and the central cylinder.
2. The method for processing the large-area ultra-soft soil foundation in the port of claim 1, wherein the plurality of first openings are symmetrically distributed on the side wall of the main pipe, the thickness of the wing plates decreases from the position close to the main pipe to the position far from the main pipe, and the width of the wing plates decreases from the position close to the main pipe to the position far from the main pipe.
3. The method for treating the large-area ultra-soft soil foundation of the port as claimed in claim 2, wherein the hollow chamber is filled with geotextile.
4. The method for treating a large-area ultra-soft soil foundation in a port according to claim 1, wherein the main pipe and the central cylinder are extended out of the sand cushion layer, an annular groove is dug around the central cylinder, and a sealing film is laid in the annular groove.
5. The method for treating the large-area ultra-soft soil foundation of the port according to claim 4, further comprising:
and a connecting rod is arranged, one end of the connecting rod is fixed with the central cylinder, and the other end of the connecting rod is fixed with the main pipe.
6. The method for treating the large-area ultra-soft soil foundation of the port as claimed in claim 2, wherein the distance between the central cylinder and the main pipes is 10-15 times of the diameter of the central cylinder, and the distance between two adjacent main pipes is not more than 4-5 times of the length of the wing plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910549321.XA CN110331710B (en) | 2019-06-24 | 2019-06-24 | Port large-area ultra-soft soil foundation treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910549321.XA CN110331710B (en) | 2019-06-24 | 2019-06-24 | Port large-area ultra-soft soil foundation treatment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110331710A CN110331710A (en) | 2019-10-15 |
| CN110331710B true CN110331710B (en) | 2021-03-09 |
Family
ID=68142677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910549321.XA Active CN110331710B (en) | 2019-06-24 | 2019-06-24 | Port large-area ultra-soft soil foundation treatment method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110331710B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110863481A (en) * | 2019-11-04 | 2020-03-06 | 三峡大学 | Method for drainage, exhaust and consolidation treatment of weak subjacent layer |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004204573A (en) * | 2002-12-26 | 2004-07-22 | Shimizu Corp | Method of preventing liquefaction of ground |
| CN102465523B (en) * | 2010-11-19 | 2013-09-18 | 葛辉 | Dry and dense resonance method for reinforcing soft soil foundation of new hydraulic-fill sand |
| CN102226337B (en) * | 2011-04-22 | 2012-07-04 | 河海大学 | Three-dimensional drain and construction method thereof |
| CN102518115A (en) * | 2011-12-22 | 2012-06-27 | 中铁第四勘察设计院集团有限公司 | Method for reinforcing soft soil foundation of large-area storage yard |
| CN102767174A (en) * | 2012-07-17 | 2012-11-07 | 沈卫清 | Dynamic and static water-discharging vibration method |
| WO2017159692A1 (en) * | 2016-03-18 | 2017-09-21 | 正佳 近藤 | Vacuum consolidation and dredging method, tower-like airtight preloading caisson, and dedicated work ship |
-
2019
- 2019-06-24 CN CN201910549321.XA patent/CN110331710B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN110331710A (en) | 2019-10-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10309072B2 (en) | Water-permeable pipe pile system capable of accelerating soil consolidation and method of using the same | |
| CN206220085U (en) | A kind of permeable pile tube system for accelerating to consolidate | |
| CN110331710B (en) | Port large-area ultra-soft soil foundation treatment method | |
| CN101255691A (en) | Construction method for complete casing tube thin wall filling pile and movable internal mold | |
| CN111206564A (en) | Construction method for consolidating foundation by combining vacuum drainage and water-borne preloading | |
| CN106930304A (en) | Drift sand base pit dewatering construction method | |
| CN102767174A (en) | Dynamic and static water-discharging vibration method | |
| CN110042830A (en) | A kind of concrete fills out the stake of core perforated pipe and construction method | |
| CN210002387U (en) | soft soil consolidation drainage device | |
| KR101657183B1 (en) | Cast-in pile construction method using compaction device | |
| CN110847911A (en) | Vertical shaft tunneling construction method for passing through thin quicksand layer | |
| CN103953367A (en) | Method of eliminating liquefaction in shield tunnel stratum in tunnel | |
| WO2020240779A1 (en) | Ground improvement method | |
| CN109914392A (en) | Upper section draining is lower to save not drain combination type prefabricated tubular pile and construction method | |
| CN111945702A (en) | Rapid pile body arranging method for reinforcing large-area soft foundation | |
| CN209975498U (en) | Vacuum preloading drain pipe | |
| CN210002388U (en) | vacuum preloading drain pipe application device | |
| CN113404044A (en) | Hierarchical pore-forming construction method for rotary digging cast-in-place pile | |
| CN113235550A (en) | Reinforcement construction method of miscellaneous fill foundation | |
| CN106703009A (en) | Vacuum preloading drainage assembly | |
| CN106836211B (en) | Prefabricated club-footed reducing pile for treating soft soil foundation and construction method thereof | |
| CN102776891A (en) | Method for processing underground supporting structure leakage of foundation with rock block layer in soft soil | |
| CN206385527U (en) | A kind of vacuum preloading drain assembly | |
| CN112695767B (en) | Water lowering structure and water lowering method for micro-expansive soil foundation pit soaked by underground water | |
| JP4348830B2 (en) | Construction method for underwater foundation structures |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |