CN210887186U

CN210887186U - A prevent drainage device that bends for vacuum preloading consolidates soft soil foundation

Info

Publication number: CN210887186U
Application number: CN201921403475.XU
Authority: CN
Inventors: 雷华阳; 王磊; 刘景锦; 刘旭; 王鹏; 章纬地; 李宸元
Original assignee: Tianjin University
Current assignee: Tianjin University
Priority date: 2019-08-27
Filing date: 2019-08-27
Publication date: 2020-06-30
Anticipated expiration: 2029-08-27

Abstract

The utility model provides a prevent drainage device that bends for vacuum pre-compaction consolidates weak soil foundation, include the horizontal drainage channel who connects through the attach fitting, the attach fitting has seted up connection interface, it is equipped with the drain bar to insert in the connection interface, the drain bar is hollow structure, be provided with vertical baffle in the drain bar, still be provided with vertical reinforcing muscle in the drain bar, drain bar outer wall parcel has the filter membrane. The utility model discloses having improved the bending resistance and the bending resistance ability of drain bar on the basis of guaranteeing drainage effect, having realized at vacuum pre-compaction reinforcement dredger fill in-process, the drain bar can not take place to buckle because of the inhomogeneous settlement of foundation soil, has guaranteed the straightness that hangs down of drain bar in whole reinforcement process, consolidates later stage vacuum transmission efficiency, drainage rate and can not appear obviously descending, has increased substantially the reinforcement effect.

Description

A prevent drainage device that bends for vacuum preloading consolidates soft soil foundation

Technical Field

The utility model relates to a reinforced technical field of soft soil foundation with specifically, relate to a prevent drainage device that bends for vacuum pre-compaction consolidates soft soil foundation.

Background

With the continuous leap of national economy, the problem of land resource shortage seriously restricts the development of coastal areas, and the land reclamation from the sea is widely applied and popularized in the coastal areas as an effective means for solving the shortage of land resources in the coastal areas. The vacuum preloading method is a common foundation treatment method and is widely applied to sea reclamation projects. The vacuum preloading method comprises the steps of firstly laying a horizontal sand cushion layer, arranging a vertical drainage device in the soil, then laying a sealing film on the sand cushion layer, and connecting the sealing film with a vacuum device through a vertical pipeline arranged in the sand cushion layer, so that vacuum negative pressure is generated in the soil body, pore water is discharged under the action of vacuum pressure, the pressure of the pore water is gradually dissipated, the soil body is solidified, the foundation is settled, the effective stress and the strength of the soil body are gradually improved in the reinforcing process, and the aim of reinforcing the soil body is finally achieved.

However, the soft soil foundation formed by the land reclamation project from the sea has the problems of high porosity ratio, high compressibility, low permeability, low shear strength and the like, and meanwhile, the poor project characteristics of low foundation bearing capacity, large deformation and obvious rheological property exist, and the defect of reinforcement by the traditional vacuum preloading method is obvious. Therefore, various types of improvement measures and methods appear on the basis of the traditional vacuum preloading reinforcement treatment, such as a sand-free direct-discharge vacuum preloading technology, an air pressure splitting vacuum preloading technology, an air injection pressurization vacuum preloading technology, an electroosmosis combined vacuum preloading technology, a surcharge combined vacuum preloading technology and the like, but still have more defects: firstly, the fine silt near the drainage plate blocks the drainage plate, and the drainage plate is bent along with the settlement of the foundation, so that the early-stage drainage amount is large, the drainage effect is obvious, the attenuation amplitude of the vacuum degree is obviously increased in the later stage, the drainage speed is obviously reduced due to the attenuation of the vacuum degree in the later stage of the reinforcing project, particularly, the soil body far away from the drainage plate and deep is not sufficiently reinforced, and the foundation treatment effect is seriously influenced; secondly, in actual engineering, along with the foundation settlement volume constantly increases, the drain bar phenomenon of buckling is more obvious, and drainage rate reduces gradually, and the drain bar is buckled and is very obvious to the influence of drainage efficiency.

Therefore, there is a need for a technical solution capable of preventing a drainage device from bending in the prior art, so as to avoid or reduce the bending condition of a drainage plate in engineering, thereby improving the vacuum preloading reinforcement effect.

SUMMERY OF THE UTILITY MODEL

The utility model provides a be not enough to above-mentioned prior art, the utility model provides a prevent that drain bar from subsiding and buckling along with the ground, slow down the decline of drainage rate, improve the soil body and consolidate being used for vacuum preloading and consolidate soft soil foundation's drainage device that bends.

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes:

the utility model provides a drainage device that prevents buckling for vacuum pre-compaction consolidates soft soil foundation, includes the horizontal drainage channel who connects through the attach fitting, the attach fitting has seted up connection interface, it is equipped with the drain bar to insert in the connection interface, the drain bar is hollow structure, be provided with vertical baffle in the drain bar, still be provided with vertical reinforcing muscle in the drain bar, the outer wall parcel of drain bar has the filter membrane.

And spaces among the vertical partition plates and between the vertical partition plates and the vertical reinforcing ribs form vertical drainage channels.

The filter membrane is made of polytetrafluoroethylene material.

The vertical reinforcing rib is made of a carbon fiber reinforced PVC composite material.

The connecting joint is a hollow plastic pipe.

Compared with the prior art, the utility model beneficial effect be: by adding the vertical reinforcement, on the basis of ensuring the drainage effect, the bending resistance and the bending resistance of the drainage plate are greatly improved, the drainage plate is prevented from being bent due to uneven settlement of foundation soil in the vacuum preloading reinforcement dredger fill process, the verticality of the drainage plate in the whole reinforcement process is ensured, the vacuum degree transmission efficiency and the drainage rate are prevented from being obviously reduced in the later reinforcement period, and the reinforcement effect is greatly improved; and the attenuation phenomenon of the vacuum degree caused by the bending of the drainage plate is obviously weakened, and the drainage efficiency is well ensured.

Drawings

Fig. 1 is a schematic view of the structure of the present invention.

Fig. 2 is a schematic top view of the plane a-a of fig. 1.

Fig. 3 is a schematic top view of the connection joint.

Fig. 4 is a side view of the connection joint.

Reference numerals: 1-horizontal drainage channel, 2-connection joint, 3-vertical reinforcement bar, 4-drainage plate, 5-connection interface, 6-filter membrane, 7-vertical drainage channel and 8-vertical partition plate.

Detailed Description

The present invention will be further described with reference to the following examples.

As shown in fig. 1, a prevent drainage device that bends for vacuum preloading consolidates soft soil foundation, include the horizontal drainage channel 1 that the attach fitting 2 who makes through hollow plastic tubing connects, attach fitting 2 has seted up connection interface 5, it is equipped with drain bar 4 to insert in connection interface 5, drain bar 4 is hollow structure, be provided with vertical baffle 8 in the drain bar 4, still be provided with the vertical reinforcing muscle 3 that carbon fiber reinforcement PVC combined material made in the drain bar 4, the outer wall parcel of drain bar 4 has the filter membrane 6 that the polytetrafluoroethylene material made. The spaces between the vertical partition plates 8 and the vertical reinforcing ribs 3 form vertical drainage channels 7.

As shown in fig. 2, the drainage plate 4 is a hollow structure, vertically inserted in the soil body, and shaped like a harmonica, and has a plurality of longitudinal partitions made of plastic inside to partition the inside of the drainage plate 4 into a plurality of vertical exhaust channels.

As shown in fig. 3-4, the connection interface 5 at the lower part of the connection joint 2 is a rectangular slot, so that the upper end of the drainage plate 4 can be just inserted, when the soil body is consolidated by vacuum preloading, the vacuum pumping device generates vacuum negative pressure inside the soil body, so that pore water of the soil body is discharged under the action of vacuum pressure, enters the plurality of vertical drainage channels 7 of the drainage plate 4, then enters the cavity inside the connection joint 2 through the opening at the upper end of the drainage plate 4, and finally enters the horizontal drainage channels 1 connected with the two ends of the connection joint 2 to be discharged out of the soil body.

The polytetrafluoroethylene material has ventilative waterproof performance, adopts polytetrafluoroethylene to make filter membrane 6, wraps up the outer wall of drain bar 4, can prevent that the water in the drain bar 4 from permeating back to the soil body around through the outer wall of drain bar 4, influences the drainage effect of soil body.

The above is only the preferred embodiment of the present invention, but the present invention is not limited to the above-mentioned specific embodiments, and for those skilled in the art, a plurality of modifications and improvements can be made without departing from the inventive concept of the present invention, and these modifications and improvements all belong to the protection scope of the present invention.

Claims

1. The utility model provides a drainage device that prevents buckling for vacuum preloading consolidates soft soil foundation, includes horizontal drainage channel (1) of connecting through attach fitting (2), characterized by, connect fitting (2) have been seted up connection interface (5), it is equipped with drain bar (4) to insert in connection interface (5), drain bar (4) are hollow structure, be provided with vertical baffle (8) in drain bar (4), still be provided with vertical reinforcing muscle (3) in drain bar (4), drain bar (4) outer wall parcel has filter membrane (6).

2. The anti-bending drainage device for vacuum preloading soft soil foundations as claimed in claim 1, wherein the spaces between the vertical partition plates (8) and the vertical reinforcing ribs (3) constitute vertical drainage channels (7).

3. The anti-bending drainage device for vacuum preloading soft soil foundations as claimed in claim 1, wherein the filter membrane (6) is made of polytetrafluoroethylene material.

4. The anti-bending drainage device for vacuum preloading soft soil foundations as claimed in claim 1, wherein the vertical reinforcing ribs (3) are made of carbon fiber reinforced PVC composite material.

5. The anti-bending drainage device for vacuum preloading soft soil foundations as claimed in claim 1, wherein the connection joints (2) are hollow plastic pipes.