CN-122013748-A - Composite drainage system and method capable of realizing dual functions of pressurization and range increase

CN122013748ACN 122013748 ACN122013748 ACN 122013748ACN-122013748-A

Abstract

The invention relates to the technical field of soft soil foundation treatment, in particular to a composite drainage system and a method capable of realizing dual functions of pressurization and range increase, comprising a vacuumizing system and a sealing system which are arranged on the ground surface, wherein valves are arranged on a pressurization pipeline and a range increase pipeline, and the opening and closing of the pressurization system and the range increase system are switched by controlling the on-off of each valve; the flexible switching between the pressurizing system and the range-increasing system is realized through valve control, wherein when the range-increasing system is started, a steel wire hose in the composite drainage plate can compensate shallow vacuum loss, so that the vacuum degree is effectively transferred to deep soil mass to enhance the treatment effect of a deep soft foundation, when the pressure-increasing system is switched to the pressurizing system, the soil mass drainage is accelerated through air pressure difference, and simultaneously high-pressure gas backflushes the composite drainage plate, so that the clogging risk is obviously reduced, and meanwhile, the 'one-plate multi-purpose' of the composite drainage plate is realized through switching the pressurizing and range-increasing system, so that the construction cost is saved, the treatment effect of a soft soil foundation is improved, and the construction period is shortened.

Inventors

YANG LIN
CHEN SAI
WU HAIYANG
LIN YUANCHU
LIU JUNJIE
Hu Baichuan
HE JUN
ZHOU HUIPENG
YAN XIAOXIONG

Assignees

江苏盐城港港湾开发建设集团有限公司
河海大学
中国铁建港航局集团有限公司
宁波市水利水电规划设计研究院有限公司
河海大学淮安研究院

Dates

Publication Date: 20260512
Application Date: 20260213

Claims (10)

1. The composite drainage system capable of realizing dual functions of pressurization and range expansion comprises a vacuumizing system, a sealing system, a water-vapor separation tank (5) and an air compressor (6) which are arranged on the ground surface (2), and is characterized in that the sealing system comprises a sealing groove (1) arranged on the periphery of the ground surface (2) and a sealing layer embedded in the sealing groove (1), the periphery of the sealing layer is embedded in the sealing groove (1), the vacuumizing system comprises a vacuum pump (4) arranged above the ground surface (2), the vacuum pump (4) is communicated with a plurality of groups of vacuum pipelines (11), and one ends of the vacuum pipelines (11) are all communicated with drain plates (13) which are inserted into a soft soil layer (3) in an on-off controllable manner; The composite drainage system also comprises a range-extending system, a pressurizing system and a plurality of composite drainage plates (14) inserted into the soft soil layer (3), wherein the plurality of composite drainage plates (14) and the plurality of drainage plates (13) are arranged in a staggered manner; The range-increasing system comprises a range-increasing Cheng Guanxian (10) communicated with the vacuum pump (4), the range-increasing Cheng Guanxian (10) is communicated with the composite drain plate (14) through a three-way valve (18) arranged on the steel wire hose (15), the pressure-increasing system comprises a pressure-increasing pipeline (9) communicated with the air compressor (6), and the pressure-increasing pipeline (9) is communicated with the composite drain plate (14) through the three-way valve (18) arranged on the steel wire hose (15); Valves (17) are arranged on the pressurizing pipeline (9) and the increase Cheng Guanxian (10), and the opening and closing of the pressurizing system and the range increasing system are switched by controlling the on-off of each valve (17).
2. The composite drainage system capable of achieving dual functions of pressurization and range expansion according to claim 1, wherein the steel wire hose (15) comprises a main steel wire hose (151), a pressurization steel wire hose (152) and a range expansion Cheng Gangsi hose (153), a hand-shaped connector (16) is fixedly arranged at one end of the main steel wire hose (151), the main steel wire hose (151) is communicated with the composite drainage plate (14) through the hand-shaped connector (16), the other end of the main steel wire hose (151) is respectively communicated with the pressurization steel wire hose (152) and the range expansion Cheng Gangsi hose (153) through a three-way valve (18), and the pressurization steel wire hose (152) and the range expansion Cheng Gangsi hose (153) are respectively communicated with the pressurization pipeline (9) and the range expansion Cheng Guanxian (10).
3. The composite drainage system capable of achieving dual functions of pressurization and range expansion according to claim 2, wherein the main steel wire hose (151), the pressurization steel wire hose (152) and the range expansion Cheng Gangsi hose (153) are composed of a reinforcing layer, an inner layer pipe fixedly installed on the inner side wall of the reinforcing layer and an outer layer protection sleeve fixedly installed on the outer side wall of the reinforcing layer, the reinforcing layer is made of spiral steel wires, the inner layer pipe is made of polytetrafluoroethylene, and the outer layer protection sleeve is made of polyvinyl chloride.
4. The composite drainage system capable of achieving dual functions of supercharging and range-increasing according to claim 1, wherein the supercharging pipeline (9) comprises a supercharging branch pipe (91) and a supercharging main pipe (92) communicated with the supercharging branch pipe (91), the separation ends of the supercharging branch pipe (91) and the supercharging main pipe (92) are respectively communicated with the air compressor (6) and the composite drainage plate (14), and the valve (17) is fixedly arranged on the supercharging main pipe (92).
5. The composite drainage system capable of achieving dual functions of pressurization and range expansion according to claim 1, wherein the range expansion Cheng Guanxian (10) comprises a range expansion main pipe (102) communicated with the range expansion Cheng Zhiguan (101) and Cheng Zhiguan (101), the separated ends of the range expansion main pipe (102) and the range expansion Cheng Zhiguan (101) are respectively communicated with a vacuum pump (4) and a composite drainage plate (14), and the valve (17) is fixedly installed on the range expansion main pipe (102).
6. The composite drainage system capable of achieving dual functions of pressurization and elevation according to claim 1, wherein the sealing layer comprises a sealing film (7) and geotextile (8) which are paved above the ground surface (2), the sealing film (7) and the geotextile (8) are stacked, and the periphery of the sealing film (7) and the periphery of the geotextile (8) are buried in the sealing groove (1).
7. The composite drainage system capable of achieving dual functions of pressurization and range expansion according to claim 1, wherein a butterfly joint (12) is fixedly arranged between the vacuum pipeline (11) and the drainage plate (13).
8. The composite drainage system capable of achieving dual functions of pressurization and range expansion according to claim 1, wherein the composite drainage plate (14) comprises an outer jacket (141), an anti-corrosion sleeve (142) and a strengthening sleeve (143) fixedly installed inside the outer jacket (141), the anti-corrosion sleeve (142) and the strengthening sleeve (143) are arranged at intervals, a runner (144) is formed inside the outer jacket (141), a plurality of groups of protruding points (145) which are distributed at intervals are fixedly arranged on two sides of the inner wall of the runner (144), branch pipes (146) are arranged between every two adjacent protruding points (145) in an inserted mode, and auxiliary pipes (147) are embedded inside the branch pipes (146).
9. A composite drainage method capable of realizing dual functions of pressurization and range expansion, which is applied to the composite drainage system as claimed in claim 1, and is characterized by comprising the following steps: S1, laying woven cloth on the ground surface (2) of a soft soil layer (3) to be treated to provide bearing capacity, and inserting and beating the drainage plates (13) and the composite drainage plates (14) into the soft soil layer (3) in a spacing arrangement mode; S2, arranging a vacuum pump (4), a water-vapor separation tank (5) and an air compressor (6) on the ground surface (2), communicating a drain plate (13) with the vacuum pump (4) through a vacuum pipeline (11), communicating a composite drain plate (14) with the vacuum pump (4) and the air compressor (6) through a range-increasing system and a pressurizing system respectively, and connecting the input end of the water-vapor separation tank (5) into the drain plate (13) and the composite drain plate (14); S3, excavating a sealing groove (1) around the earth surface (2) covered by the sealing layer, embedding the peripheral edges of the sealing layer into the sealing groove (1) for sealing, and starting a vacuum pump (4) for vacuumizing; S4, starting a range-extending system and closing a pressurizing system in the early stage of vacuumizing, so that shallow vacuum loss of the soft soil layer (3) is eliminated by the composite drain board (14) through the steel wire hose (15), the vacuum is transferred to a deep soil body of the soft soil layer (3), and the treatment of a deep soft soil foundation of the soft soil layer (3) is improved; s5, when the pressure boosting system is started and the stroke increasing system is closed in the middle and later stages, the composite drainage plate (14) accelerates the drainage rate of the soil body of the soft soil layer (3) under the action of pressure boosting pressure difference through the steel wire hose (15).
10. The method for composite drainage capable of achieving dual functions of pressurization and range increase according to claim 9, wherein in step S5, when the soil consolidation rate of the soft soil layer (3) is reduced, intermittent pressurization is performed every day, each time the pressurization is performed for 30min, the pressurization pressure is 20 kPa, and the high-pressure gas during pressurization reversely washes the composite drainage plate (14) to reduce clogging of the composite drainage plate.

Description

Composite drainage system and method capable of realizing dual functions of pressurization and range increase Technical Field The invention relates to the technical field of soft soil foundation treatment, in particular to a composite drainage system and a method capable of realizing dual functions of pressurization and range increase. Background Soft soil is widely distributed in coastal areas, inland lakes, river delta and the like in China, and the areas are often key areas for economic development and infrastructure construction. Meanwhile, with the continuous improvement of comprehensive national force and continuous development of economy in China, the demand on port throughput is increasingly improved, on one hand, the problem of land resource shortage exists in coastal cities, and on the other hand, the problem of secondary utilization of channel dredging soil exists, so that part of port expansion projects in coastal areas are gradually expanded to develop and utilize new port land areas formed by the channel dredging soil in the offshore areas, however, dredging soft soil has the characteristics of high water content, low strength, high compressibility, poor permeability, soil layer thickness and the like, and if corresponding engineering measures are not adopted, the problems of overlarge settlement, insufficient stability and the like are caused when buildings or structures are directly built on the dredging soft soil, so that the engineering safety and the service performance are seriously influenced. Along with the enhancement of environmental awareness, the engineering construction has higher and higher requirements on environmental protection, and the vacuum preloading technology is more and more concerned as a green and environment-friendly foundation treatment method. Through many years of research and engineering application, the vacuum preloading method has become a main method for treating soft soil foundations in China, but in the process of being applied to treating deep hydraulic filling of muddy soft soil foundations in harbors, the traditional vacuum preloading process gradually exposes partial limitations: (1) The vacuum degree in the drain board is seriously attenuated along the depth direction of the drain board flashboard, and the vacuum degree is attenuated to be more than-10 kPa/m in the newly filled silt, so that the vacuum degree cannot be transmitted to deep soil. (2) Because the drainage plate can be bent and blocked along with the drainage consolidation of the soil body in the vacuumizing process, larger vacuum degree along-distance loss is generated, the vacuum degree cannot be transmitted to the deep soil body, a shallower hard shell layer is formed on the surface layer of the soil body, the deep soil body is still soft mud, the deep soil body has poor treatment effect, and larger post-construction settlement is generated. In order to solve the problems of insufficient effective treatment depth and poor deep soil treatment effect of the traditional vacuum preloading method, and shorten the construction period to a certain extent, the traditional vacuum preloading process needs to be improved. Disclosure of Invention Therefore, the invention aims to provide a composite drainage system and a method capable of realizing dual functions of pressurization and range increase, so as to solve the problem of poor deep soil treatment effect. Based on the purposes, the invention provides a composite drainage system capable of realizing dual functions of pressurization and range increase, which comprises a vacuumizing system, a sealing system, a water vapor separation tank and an air compressor, wherein the vacuumizing system, the sealing system, the water vapor separation tank and the air compressor are arranged on the ground surface; The composite drainage system also comprises a range extending system, a pressurizing system and a plurality of composite drainage plates inserted into the soft soil layer, wherein the composite drainage plates and the drainage plates are arranged in a staggered manner; The range increasing system comprises a range increasing Cheng Guanxian communicated with a vacuum pump, the range increasing Cheng Guanxian is communicated with the composite drain board through a three-way valve arranged on a steel wire hose, the pressure increasing system comprises a pressure increasing pipeline communicated with an air compressor, and the pressure increasing pipeline is communicated with the composite drain board through a three-way valve arranged on the steel wire hose; Valves are arranged on the pressurizing pipeline and the range-extending pipeline, and the pressurizing system and the range-extending system are switched on and off by controlling the on-off of each valve. Preferably, the steel wire hose comprises a main steel wire hose, a pressurizing steel wire hose and a reinforcing Cheng Gangsi hose, wherein a hand joint is fixedly arranged at one end of the