LU101744B1 - Device and construction method for stratified consolidation of ultra-soft soil foundation - Google Patents
Device and construction method for stratified consolidation of ultra-soft soil foundation Download PDFInfo
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- LU101744B1 LU101744B1 LU101744A LU101744A LU101744B1 LU 101744 B1 LU101744 B1 LU 101744B1 LU 101744 A LU101744 A LU 101744A LU 101744 A LU101744 A LU 101744A LU 101744 B1 LU101744 B1 LU 101744B1
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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
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- General Engineering & Computer Science (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a device and construction method for stratified consolidation of an ultra-soft soil foundation. The key to the invention lies in that a multi-layer drain consisting of drainage pipes, a main pipe and a pipe support is adopted, wherein a plurality of pipe outlets are formed in a pipe body of the main pipe, and the pipe support is used to drive the drainage pipes into soil layer by layer; and small holes are formed all over pipe bodies, horizontally stretching into the soil, of the drainage pipes, and the surfaces of the pipe bodies are wrapped with filter cloth. The multi-layer drain is used to consolidate ultra-soft soil by vacuum preloading, so that the problem that only a hard crust can be formed through a traditional vacuum preloading technique for consolidating ultra-soft soil is solved; and the device is simple in structure, easy and convenient to operate, high in efficiency and low in cost.
Description
' LU101744 Device and Construction Method for Stratified Consolidation of Ultra-soft Soil Foundation Technical Field The invention belongs to the field of geotechnical engineering, and particularly relates to a device and construction method for stratified consolidation of an ultra-soft soil foundation. Description of Related Art Land, as a precious depletable resource, has the ecological service functions of conditioning, purifying, circulating and buffering urban and rural environments, and mankind should develop and use every inch of land adequately and fairly. It will be inevitable to encounter ultra-soft soil foundations in the land development and utilization process, and ultra-soft soil is typically found in coastal regions, the middle and lower reaches of rivers or regions near lakes, and is featured by high natural water content, high porosity, high compressibility, small permeability, and the like. In recent years, with the gradual increase of hydraulic reclamation projects and dredging projects which exhibit higher water content, lower strength and weaker solidification and compressibility than naturally-deposited soft clay, many difficulties and challenges have arisen in the process of exploiting and using ultra-soft soil foundations.
Ultra-soft soil cannot meet the requirements of building foundations and storage yards for the bearing capacity and even cannot meet the requirements of common farming land due to its extremely low shear strength, and needs to be consolidated. The primary issue to be settled for improving the consolidation strength of ultra-soft soil is the drainage of a large quantity of water in the soil. Vacuum preloading is one of the common methods implemented both at home and abroad for the treatment of large-area ultra-soft soil foundations, and this method should be used in conjunction with vertical drains to satisfy basic drainage consolidation requirements. Plastic drainage plates, as the most widely used drains at present, have the problems of single drainage direction, long drainage path and the like. The drainage consolidation rate of the vacuum preloading method is limited by the permeability coefficient of the ultra-soft soil, the consolidation time is long, and the drains may be blocked by a large content of fine particles in the ultra-soft soil, which in turn results in attenuation of the vacuum degree in the depth direction of the soil; the bearing capacity of foundations is improved finitely, only a hard crust with a
’ LU101744 thickness of about 1m is formed, and soil below the hard crust cannot be effectively consolidated.
Existing stereo drains or umbrella-type drains comprise vertical and lateral drainage channels and are characterized by stereoscopic and multidirectional drainage. Compared with plastic drainage plates, the stereo drains or umbrella-type drains can decrease the drainage path and improve the uniformity of vacuum preloading consolidation of soil. However, such drains have the following problems: it is difficult to drive the lateral drainage channels and the vertical drainage channels into soil synchronously, the positions of the lateral drainage channels are difficult to control, and such drains are suitable for shallow soil.
Brief Summary of the Invention The objective of the invention is to provide a device and construction method for stratified consolidation of an ultra-soft soil foundation to solve the above-mentioned problems of the prior art.
Technical solution: A device for stratified consolidation of an ultra-soft soil foundation comprises: A main pipe having at least two sets of pipe outlets in the length direction of a pipe body, wherein at least one guide groove is formed in the top end of the main pipe, ball assemblies are arranged in the pipe outlets, and horizontal brackets are arranged on the outer sides of the pipe outlets; A pipe support comprising a pipe disc formed with a pipe hole and a moving hole, a pipe casing arranged on one side of the pipe disc and communicated with the pipe hole, and a convex trough circumferentially arranged on the pipe disc and matched with the guide groove; and A drainage pipe having an end extending to a preset position of the main pipe through the pipe support and penetrating through one horizontal bracket to extend into soil, as well as an end connected to a vacuum pump, wherein water holes are formed all over a pipe body, stretching into the soil, of the drainage pipe, and the surface of the pipe body is wrapped with filter cloth.
According to one aspect of the invention, the pipe outlets are arrayed in the vertical direction of the main pipe side by side or in a staggered manner, and 4-8 pipe outlets are regularly distributed in the pipe body along one cross-section of the main pipe. Each ball assembly comprises a ball retainer fixed to the main pipe and formed with a positioning hole, as well as balls movably embedded in the ball retainer; the positioning hole has a diameter smaller
’ LU101744 than that of the balls; and when the main pipe is vertically placed, at least part of the balls move towards the axis of the corresponding pipe outlet to make a gap of the pipe outlet smaller than a preset value. The moving hole extends in a radial direction of the pipe disc, the positions of the pipe hole and the pipe casing can be adjusted along the moving hole in a diameter direction of the pipe disc, and a lifting ring is arranged on the pipe disc. When the device comprises two or more main pipes or pipe casings, the main pipes or the pipe casings are connected in a screwed manner or a clamped manner, and the bottom ends of the pipe casings are bent by 90°. The pipe casing has an inner diameter greater than that of the drainage pipe, and the drainage pipe stretches out of the pipe casing to enter one pipe outlet of the main pipe. The drainage pipe has an end connected to a multi-way valve; a tractor is arranged in the middle of the drainage pipe; and a spindle is arranged at the end of the drainage pipe, and the drainage pipe is wound on the spindle and has an end stretching out to be connected to the tractor. A pumping pipe is arranged at one end of the multi-way valve, and the vacuum pump is arranged at the other end of the pumping pipe.
The device for stratified consolidation of an ultra-soft soil foundation comprises: A multi-layer drain, wherein the multi-layer drain comprises drainage pipes, a main pipe and a pipe support, wherein a plurality of pipe outlets are formed in a pipe body of the main pipe, the pipe support is used to drive the drainage pipes into soil layer by layer, small holes are formed all over pipe bodies, stretching into the soil, of the drainage pipes, and the surfaces of the pipe bodies are wrapped with filter cloth.
The pipe outlets in the main pipe are vertically arrayed side by side or in a staggered manner at an interval of 1-2m, 4-8 pipe outlets are formed in the pipe body along one cross-section of the main pipe, the pipe outlets are provided with horizontal brackets having a length of 2-5cm and located outside the main pipe, and balls capable of being adjusted according to the diameter of the drainage pipes are arranged in the pipe outlets. A plurality of grooves and a plurality of convex troughs to be connected to the pipe support are arranged at the top of the main pipe, so that pipe connection is facilitated. A plurality of pipe holes and a lifting ring are arranged on the pipe disc, the lower ends of the pipe holes are connected to pipe casings, the positions of the pipe holes and the pipe casings can be adjusted along moving holes in a diameter direction of the pipe disc, the length of the pipe casings can be adjusted through screw joints, and the bottom ends of the pipe casings are bent by 90°. A thread is arranged on the pipe body in the length direction to facilitate installation and fixation of the main pipe. The inner diameter of the pipe casings is greater than that of the drainage pipes, the drainage pipes stretch out of the pipe
* LU101744 casings to enter the pipe outlet of the main pipe, and it is ensured that the drainage pipes can stretch into the pipe outlets of the main pipe. One end of the drainage pipes is fixedly connected to a multi-way valve, a tractor is arranged in the middle of the drainage pipes, a spindle is arranged at the end of each drainage pipe, the drainage pipes are wound the spindles, and one end of the drainage pipes extend out to be connected to the tractor. The device can control drainage and is simple in structure and reliable in operation. A pumping pipe is arranged at one end of the multi-way valve, and a vacuum pump is arranged at the other end of the pumping pipe, and the vacuum pump can automatically regulate the pump output, can be automatically started and stopped at a set time, and can achieve quantitative vacuum filtration at a set time, thus improving the working efficiency and being more intelligent.
In a further embodiment, an operating method of the device for stratified consolidation of an ultra-soft soil foundation comprises the following steps: S1: driving a plastic drainage plate into an ultra-soft soil foundation by 1m, and consolidating the ultra-soft soil foundation through a vacuum preloading method to form a hard crust; S2: sealing the bottom of the main pipe with a cap, and mechanically and manually driving a plurality of main pipes into ultra-soft soil every 1-1.5m; S3: assembling the pipe supports, adjusting the length of the pipe casings through screw joints according to an insertion depth of the drainage pipes until the length of the pipe casings is equal to the insertion depth of the drainage pipes, so as to install the drainage pipes at the pipe holes of the pipe supports; placing the pipe supports into the main pipes in a manner that the convex troughs of the pipe supports are connected to the grooves of the main pipes, and adjusting the positions of the pipe holes and the pipe casings through the moving holes until the tail ends of the pipe casings are connected to the pipe outlets of the main pipes; S4: sequentially driving the drainage pipes into the pipe holes by the tractor to enter the pipe casings and then to stretch out of the pipe outlets of the main pipes to be horizontally inserted into the ultra-soft soil; SS: connecting the other ends of the drainage pipes buried to the same depth to the multi-way valve, connecting the other end of the multi-way valve to the vacuum pump through | 30 the pumping pipe, and starting the vacuum pump to consolidate the ultra-soft soil_which is about Im above and below the drainage pipes by drainage; and S6: recovering the multi-layer drain after all layers of soil in a depth direction of the ultra-soft soil foundation are consolidated by drainage.
’ LU101744 Step SS comprises the following sub-step: consolidating the ultra-soft soil by at least two stages by the vacuum pump through a gradient vacuumizing method.
The invention has the following beneficial effects: the key device of the invention is a multi-layer drain which comprises drainage pipes, a main pipe and a pipe support, wherein a plurality of pipe outlets are formed in a pipe body of the main pipe, the pipe support is used to drive the drainage pipes into soil layer by layer, and the drainage pipes can horizontally stretch into the soil; and for the purpose of filtration, small holes are formed all over pipe bodies of the drainage pipes, and the surfaces of the pipe bodies are wrapped with filter cloth.
The device fulfills stratified consolidation of ultra-soft soil, solves the problems of single drainage direction and long drainage path of existing drains, increases the drainage consolidation rate of the ultra-soft soil, and improves the consolidation effect of vacuum preloading.
In addition, the device is simple in structure, convenient to operate, and capable of rapidly and efficiently consolidating the ultra-soft soil.
Brief Description of the Several Views of the Drawings FIG. 1 is a structural diagram of a device for stratified consolidation of an ultra-soft soil foundation.
FIG. 2 is a structural diagram of a main pipe of the invention.
FIG. 3 is a plan diagram of a pipe support of the invention.
FIG. 4 is an A-A sectional view of the pipe support of the invention.
FIG. 5 is a schematic diagram of the pipe support in an operating state of the invention.
Reference Signs: 1, main pipe; 2, groove; 3, pipe outlet; 4, ball; 5, drainage pipe; 6, pipe support; 7, convex trough; 8, pipe hole; 9, lifting ring; 10, moving hole; 11, pipe casing; 12, spindle; 13, tractor; 14, pipe disc; 15, drainage hole; 16, multi-way valve; 17, pumping pipe; 18, vacuum pump.
Detailed Description of the Invention Many concrete details are provided in the following description for a thorough understanding of the invention.
However, it is obvious for those skilled in the art to implement the invention without one or more of these details.
Some common technical characteristics in the art are not described in the embodiments to avoid confusion with the invention.
° LU101744 It should be noted that the terms such as “center”, “upper”, “lower”, “left”, “right”, “vertical”, “horizontal”, “inner” and “outer” in the description of the invention are used for indicating directional or positional relations on the basis of the drawings to facilitate and simplify the description of the invention, are not intended to indicate or imply that devices or elements referred to must have specific directions or must be configured and operated in specific directions, and thus should not be interpreted as limitations of the invention. In addition, the terms “first”, “second” and “third” are only for the purpose of description, and do not indicate or imply the relative importance of devices or elements referred to.
As shown in FIG. 1 to FIG. 5, a device for stratified consolidation of an ultra-soft soil foundation comprises a main pipe 1, grooves 2, pipe outlets 3, balls 4, drainage pipes 5, a pipe support 6, convex troughs 7, pipe holes 8, a lifting ring 9, moving holes 10, pipe casings 11, spindles 12, a tractor 13, a pipe disc 14, drainage holes 15, a multi-way valve 16, a pumping pipe 17, and a vacuum pump 18.
As shown in FIG. 1 to FIG. 5, the device is a multi-layer drain, wherein a plurality of pipe outlets 3 are formed in a pipe body of the main pipe 1; the pipe support 6 is arranged at the top of the main pipe 1 and is used to drive the drainage pipes 5 into soil layer by layer; small holes are formed all over pipe bodies, stretching into the soil, of the drainage pipes 5, so that the drainage pipes 5 can stretch into the soil; in order to prevent the small holes in the pipe bodies of the drainage pipes 5 from being blocked and to prevent soil, mud and sand from entering the drainage holes 15 via the small holes in the drainage pipes 5, the surfaces of the pipe bodies, formed with the small holes, of the drainage pipes 5 are wrapped with filter cloth.
The balls 4 are arranged in the pipe outlets 3, a plurality of grooves 2 are formed in the top end of the main pipe 1 and are connected to the convex troughs 7 of the pipe support 6, and the pipe casings 11 are disposed around the drainage pipes 5 and have an inner diameter 1-2mm greater than that of the drainage pipes 5, so that the drainage pipes 5 can stretch out of the pipe casings 11 to enter the pipe outlets 3 of the main pipe 1; and the length of the pipe casings 11 can be adjusted through screw joints, and the bottom ends of the pipe casings 11 are bent by 90°.
To ensure that the pipe holes 8 can move freely in work, a plurality of moving holes 10 are formed in the upper surface of the pipe disc 14 of the pipe support 6, and a plurality of pipe holes 8 are formed in the pipe disc 14 on the upper surface of the pipe support 6.
As shown in FIG. 3, the lifting ring is arranged on the pipe disc 14 of the pipe support 6 and is located at the center of the pipe disc 14 of the pipe support 6; one end of each pipe casing 11 is
’ LU101744 connected to the lower end of one pipe hole 8, the moving holes 10 are formed in the diameter direction of the pipe disc 14 of the pipe support 6, and the positions of the pipe holes 8 and the pipe casings 11 can be adjusted in the diameter direction of the pipe disc 14. The multi-way valve 16 is arranged at one end of the drainage pipes 5, each spindle 12 is arranged at the end of one drainage pipe 5, and the drainage pipes 5 are wound on the spindles 12 and have an end extending out to be connected to the tractor 13; and one end of the pumping pipe 17 1s connected to the multi-way valve, and the other end of the pumping pipe 17 is connected to the vacuum pump 18.
In a further embodiment, the multi-way valve 16 controls water discharge and starting of each drainage pipe 5 in work to realize stepless control, so that the device is more intelligent and user-friendly; and meanwhile, thanks to the simple structure of the multi-way valve 16, the device 1s reliable in operation and convenient to control. In a further embodiment, the main pipe 1 is made from PVC, thus having good heat resistance even when working at a high temperature in summer and being stable, not prone to sulfur corrosion or alkaline corrosion, easy to machine, and lower in production cost. A thread is arranged on the pipe body in the length direction to realize threaded connection. The drainage pipes 5 are PU pipes with good elasticity and tenacity. In a further embodiment, the pipe outlets 3 are vertically formed in the main pipe 1 side by side or in a staggered manner and are spaced from one another by 1-2m, and 4-8 pipe outlets are regularly formed in the pipe body along one cross-section of the main pipe 1. Horizontal brackets with a length of 2-Scm are arranged on the outer side of the main pipe 1. Three balls 4 are installed in each pipe outlet 3, and the size of the balls 4 can be adjusted according to the diameter of the drainage pipes 5. In a further embodiment, the inner diameter of the main pipe 1 is 80-280mm, and the wall thickness of the main pipe 1 is 0.3-2.3mm; and the inner diameter of the drainage pipes 5 is 20-100mm, and the wall thickness of the drainage pipes 5 is 0.1-2.5mm. In this embodiment, the preparation for stratified consolidation of an ultra-soft soil foundation comprises the following steps: A plastic drainage plate is manually driven into an ultra-soft soil foundation by 1m, and the ultra-soft soil foundation is consolidated through a conventional vacuum preloading method to form a hard crust to meet the approach requirements of personnel and light-duty machines. (1) The bottom of the main pipe 1 is sealed with a cap, and a plurality of main pipes 1 are mechanically and manually driven into ultra-soft soil every 1-1.5m;
© LU101744 (2) Pipe supports 6 are assembled, and the length of the pipe casings 11 is adjusted through screw joints according to the insertion depth of the drainage pipes 5 until the length of the pipe casings 11 is equal to the insertion depth of the drainage pipes 5, so that the pipe casings 11 are installed at the pipe holes 8 of the pipe support 6; the pipe supports 6 are placed in the main pipes 1 in such a manner that the convex troughs 7 of the pipe supports 6 are connected to the grooves 2 of the main pipes 1, and the positions of the pipe holes 8 and the pipe casings 11 are adjusted through the moving holes 10 until the tail ends of the pipe casings 11 are connected to the pipe outlets of the main pipes 1; (3) The drainage pipes 5 are sequentially driven into the pipe holes 8 by the tractor 13 to enter the pipe casings 11 and then stretch out of the pipe outlets of the main pipes 1 to be horizontally inserted into the ultra-soft soil; (4) The other ends of the drainage pipes 5 buried to the same depth are connected to the multi-way valve 16, the other end of the multi-way valve 16 is connected to the vacuum pump 18, and the vacuum pump 18 is started to consolidate the ultra-soft soil which is about 1m above and below the drainage pipes 5 by drainage; and (5) After all layers of soil in the depth direction of the ultra-soft soil foundation are consolidated by drainage, the multi-layer drain is recovered.
The drainage pipes 5 are wound on the spindles 12 and have an end stretching out to be connected to the tractor 13, and multiple drainage pipes 5 can be synchronously driven into the pipe outlets 3 via the pipe casings 11 to enter the ultra-soft soil without mutual interference. The balls 4 in the pipe outlets 3 are flexible and are scattered to seal the pipe outlets 3 before the drainage pipes 5 are inserted into the pipe outlets 3, so that surrounding soil is prevented from entering the main pipes 1 when the main pipes 1 are driven into the soil; and the balls 4 are compressed around the pipe outlets 3 when the main pipes 1 are inserted into the soil.
Step SS further comprises the following sub-steps: the vacuum pump consolidates the ultra-soft soil by at least two stages through a gradient vacuumizing method. For example, a five-stage vacuumizing method is adopted to gradually increase the vacuum degree to consolidate the soil.
In the above embodiment, the multi-layer drain is adopted, the drainage pipes 5 are arranged in the depth direction of the ultra-soft soil, so that more drainage paths and directions are obtained; and the ultra-soft soil is uniformly consolidated in the depth direction through the vacuum preloading technique, the drainage consolidation rate and strength of the soil are improved, energy consumption is reduced, and the problem that only a hard crust can be formed
) LU101744 through a traditional vacuum preloading technique for consolidating ultra-soft soil is solved.
The preferred embodiments of the invention are detailed above.
However, the invention is not limited to the specific details of the above embodiments.
Various equivalent transformations of the technical solution of the invention can be made on the basis of the technical concept of the invention, and all these equivalent transformations should also fall within the protection scope of the invention.
Claims (10)
1. À device for stratified consolidation of an ultra-soft soil foundation, comprising a main pipe having at least two sets of pipe outlets in a length direction of a pipe body, wherein at least one guide groove is formed in a top end of the main pipe, ball assemblies are arranged in the pipe outlets, and horizontal brackets are arranged on outer sides of the pipe outlets; a pipe support comprising a pipe disc formed with a pipe hole and a moving hole, a pipe casing arranged on one side of the pipe disc and communicated with the pipe hole, and a convex trough circumferentially arranged on the pipe disc and matched with the guide groove; and a drainage pipe having an end extending to a preset position of the main pipe through the pipe support and penetrating through one said horizontal bracket to extend into soil, as well as an end connected to a vacuum pump, wherein water holes are formed all over a pipe body, stretching into the soil, of the drainage pipe, and a surface of the pipe body is wrapped with filter cloth.
2. The device for stratified consolidation of an ultra-soft soil foundation according to Claim 1, wherein the pipe outlets are arrayed in a vertical direction of the main pipe side by side or in a staggered manner, and 4-8 said pipe outlets are regularly distributed in the pipe body along a cross-section of the main pipe.
3. The device for stratified consolidation of an ultra-soft soil foundation according to Claim 1, wherein each said ball assembly comprises a ball retainer fixed to the main pipe and formed with a positioning hole, as well as balls movably embedded in the ball retainer; the positioning hole has a diameter smaller than that of the balls; and when the main pipe 1s vertically placed, at least part of the balls move towards an axis of the corresponding pipe outlet to make a gap of the pipe outlet smaller than a preset value.
4. The device for stratified consolidation of an ultra-soft soil foundation according to Claim 1, wherein the moving hole extends in a radial direction of the pipe disc, positions of the pipe hole and the pipe casing can be adjusted along the moving hole in a diameter direction of the pipe disc, and a lifting ring 1s arranged on the pipe disc.
5. The device for stratified consolidation of an ultra-soft soil foundation according to Claim 1, wherein when the device comprises two or more main pipes or pipe casings, the main pipes or the pipe casings are connected in a screwed manner or a clamped manner, and bottom ends of the pipe casings are bent by 90°.
6. The device for stratified consolidation of an ultra-soft soil foundation according to Claim 1, wherein the pipe casing has an inner diameter greater than that of the drainage pipe, and the drainage pipe stretches out of the pipe casing to enter one said pipe outlet of the main pipe.
7. The device for stratified consolidation of an ultra-soft soil foundation according to Claim 1, wherein the drainage pipe has an end connected to a multi-way valve; a tractor is arranged in a middle of the drainage pipe; and a spindle is arranged at an end of the drainage pipe, and the drainage pipe is wound on the spindle and has an end stretching out to be connected to the tractor.
8. The device for stratified consolidation of an ultra-soft soil foundation according to Claim 1, wherein a pumping pipe is arranged at one end of the multi-way valve, and the vacuum pump is arranged at another end of the pumping pipe.
9. An ultra-soft soil foundation consolidation method adopting the device according to any one of Claims 1-8, comprising the following steps: S1: driving a plastic drainage plate into an ultra-soft soil foundation, and consolidating the ultra-soft soil foundation through a vacuum preloading method to form a hard crust; S2: sealing a bottom of the main pipe with a cap, and mechanically and manually driving a plurality of said main pipes into ultra-soft soil at a preset interval, S3: assembling the pipe supports, adjusting a length of the pipe casings through screw joints according to an insertion depth of the drainage pipes until the length of the pipe casings is equal to the insertion depth of the drainage pipes, so as to install the drainage pipes at the pipe holes of the pipe supports; placing the pipe supports into the main pipes in a manner that the convex troughs of the pipe supports are connected to the grooves of the main pipes, and adjusting the positions of the pipe holes and the pipe casings through the moving holes until tail ends of the pipe casings are connected to the pipe outlets of the main pipes; S4: sequentially driving the drainage pipes into the pipe holes by the tractor to enter the pipe casings and then to stretch out of the pipe outlets of the main pipes to be horizontally inserted into the ultra-soft soil; SS: connecting ends of the drainage pipes buried to a same depth to the multi-way valve, connecting another end of the multi-way valve to the vacuum pump through the pumping pipe, and starting the vacuum pump to consolidate the ultra-soft soil by drainage; and S6: recovering the multi-layer drain after all layers of soil in a depth direction of the ultra-soft soil foundation are consolidated by drainage.
10. The ultra-soft soil foundation consolidation method according to Claim 9, wherein Step
SS comprises the following sub-step: consolidating the ultra-soft soil by at least two stages by the vacuum pump through a gradient vacuumizing method.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910497997.9A CN110144874B (en) | 2019-06-10 | 2019-06-10 | Device for reinforcing ultra-soft soil foundation in layered mode and construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| LU101744A1 LU101744A1 (en) | 2020-12-10 |
| LU101744B1 true LU101744B1 (en) | 2021-01-13 |
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| LU101744A LU101744B1 (en) | 2019-06-10 | 2020-02-06 | Device and construction method for stratified consolidation of ultra-soft soil foundation |
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|---|---|
| CN (1) | CN110144874B (en) |
| LU (1) | LU101744B1 (en) |
| WO (1) | WO2020151769A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110144874B (en) * | 2019-06-10 | 2021-04-09 | 南通大学 | Device for reinforcing ultra-soft soil foundation in layered mode and construction method |
| CN113404516B (en) * | 2021-06-24 | 2023-09-22 | 北京中铁诚业工程建设监理有限公司 | Railway tunnel bedrock surface processing method and processing device thereof |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5190405A (en) * | 1990-12-14 | 1993-03-02 | Shell Oil Company | Vacuum method for removing soil contaminants utilizing thermal conduction heating |
| JP3009968B2 (en) * | 1992-04-27 | 2000-02-14 | 前田建設工業株式会社 | Backfill method of the back of the existing building |
| US5752784A (en) * | 1995-02-17 | 1998-05-19 | The Motz Group | Low profile drainage network for athletic field drainage system |
| JPH10159078A (en) * | 1996-11-27 | 1998-06-16 | Asanumagumi:Kk | Drain pipe and dewatering method of soft ground |
| CN202108038U (en) * | 2011-04-22 | 2012-01-11 | 张正刚 | Solid drainage body used for processing soft soil foundation with preloading method |
| CN103031834B (en) * | 2011-10-09 | 2015-04-22 | 徐云童 | Low-position vacuum preloading rapid reinforcement method of soft foundation in hydraulic filling and reclamation |
| CN203200743U (en) * | 2013-04-18 | 2013-09-18 | 中交上海航道勘察设计研究院有限公司 | Hydraulic reclamation soft clay horizontal drainage consolidation structure |
| CN207003415U (en) * | 2017-04-14 | 2018-02-13 | 沈艳忱 | Air-cushion type batch vacuum pipe well |
| CN207812420U (en) * | 2018-01-03 | 2018-09-04 | 石家庄中冀石胜机械设备有限公司 | One kind being used for agricultural irrigation Seeper discharge device |
| CN208136898U (en) * | 2018-05-05 | 2018-11-23 | 深圳市蛇口招商港湾工程有限公司 | A kind of drainage system of reinforcing soft ground |
| CN109610430B (en) * | 2019-02-19 | 2021-03-26 | 吴慧明 | Layered vacuum rapid consolidation method for hydraulic reclamation site |
| CN110144874B (en) * | 2019-06-10 | 2021-04-09 | 南通大学 | Device for reinforcing ultra-soft soil foundation in layered mode and construction method |
-
2019
- 2019-06-10 CN CN201910497997.9A patent/CN110144874B/en active Active
-
2020
- 2020-02-06 WO PCT/CN2020/074457 patent/WO2020151769A1/en active Application Filing
- 2020-02-06 LU LU101744A patent/LU101744B1/en active IP Right Grant
Also Published As
| Publication number | Publication date |
|---|---|
| CN110144874B (en) | 2021-04-09 |
| LU101744A1 (en) | 2020-12-10 |
| WO2020151769A1 (en) | 2020-07-30 |
| CN110144874A (en) | 2019-08-20 |
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|---|---|---|---|
| FG | Patent granted |
Effective date: 20210113 |