CN114427230B

CN114427230B - Ring type cavity lattice earthwork tube bag structure

Info

Publication number: CN114427230B
Application number: CN202111591681.XA
Authority: CN
Inventors: 来志强; 樊科伟; 江恩慧; 邹维列; 王仲梅; 潘丽; 任棐; 王嘉仪; 高梓轩; 武彩萍; 吴国英; 赵连军; 王远见; 李军华; 屈博; 李凌琪; 张向; 张源; 来子越; 崔颖
Original assignee: Wuhan University WHU; Yellow River Institute of Hydraulic Research
Current assignee: Wuhan University WHU; Yellow River Institute of Hydraulic Research
Priority date: 2021-12-23
Filing date: 2021-12-23
Publication date: 2022-10-21
Anticipated expiration: 2041-12-23
Also published as: CN114427230A

Abstract

The invention relates to an annular cavity lattice soil engineering pipe bag structure, which belongs to the technical field of hydraulic engineering, and has IPC classification numbers of E02B 3/00 and E02D 17/20. The invention relates to a ring-type cavity grid earthwork pipe bag structure which comprises a ring-type cavity grid earthwork pipe bag body and cavity filler, wherein the ring-type cavity grid earthwork pipe bag body is in a closed ring shape, the ring-type cavity grid earthwork pipe bag body is evenly divided into a plurality of cavity grids by an inner grid, a filling cuff is arranged above each cavity grid and is used for filling the cavity filler into the ring-type cavity grid earthwork pipe bag body through the filling cuff in a segmented mode, and the cavity filler is coarse sand mixed with water. The annular area formed by the annular cavity lattice earthwork tube bag structure is used for storing the sludge, so that the stability is high; the drainage channel between the upper layer and the lower layer of the pipe bag structure is utilized, so that sludge stored in the ring can be drained efficiently; simple and practical, and has remarkable social and economic benefits.

Description

Ring type cavity lattice earthwork tube bag structure

Technical Field

The invention relates to an annular cavity grid geotechnical pipe bag structure for storing dredged sludge, which belongs to the field of hydraulic engineering, and the IPC classification numbers of the annular cavity grid geotechnical pipe bag structure are E02B 3/,00 and E02D 17/20.

Background

A great amount of dredged sludge is generated during dredging of rivers, lakes, ponds and the like, and the dredged sludge has large water content and low mechanical strength and cannot be directly utilized. However, after the dredged sludge is subjected to drainage consolidation, the mechanical strength is improved, and the dredged sludge becomes a directly utilizable resource. At present, dredged sludge is generally directly stacked in a natural place, is slowly drained, is easy to pollute the environment and occupies the land for a long time.

The prior patent CN202010684057.3 of the invention discloses a dehydration consolidation device for slurry treatment of a geotube bag and a working method thereof, wherein a straight-tube geotube bag is adopted, the slurry is filled into the geotube bag, and the moisture in the slurry in the geotube bag is discharged in a vacuum preloading mode. The method needs to fill all the cleaned sludge into the geotechnical pipe bags instead of the area enclosed by the geotechnical pipe bags; therefore, when the volume of the dredged sludge is large, the number of the earthwork pipe bags to be filled is large, the sludge treatment cost is high, and the method has a limited volume for treating the sludge.

In the prior patent CN201810404543.8, "a silt bag soil retaining wall structure and a construction method", straight-tube soil engineering pipe bags are adopted, the straight-tube soil engineering pipe bags are stacked into a soil retaining structure, and then silt is stored in a square area behind the soil retaining structure. The structure maintains self-stability by means of the friction force between the geotechnical pipe bag layers. Because the frictional force between geotechnical pipe bag layer is less, consequently need increase geotechnical pipe bag's the width of building just can keep the stability of self structure, this geotechnical pipe bag that leads to building is in large quantity, bulky, engineering cost is high. In addition, because the structure is formed by stacking a plurality of straight tube type geotechnical pipe bags, once any part of the pipe bag is damaged, the whole structure has the risk of instability, and the stored sludge also has the risk of overflowing.

Disclosure of Invention

The invention aims to provide a ring-type geotextile tube bag structure for sludge storage and efficient drainage, which has low manufacturing cost, simple construction, environmental protection and strong stability, and aims to overcome the defects of the existing method, and the technical solution of the invention is as follows:

the annular cavity lattice earthwork pipe bag structure comprises an annular cavity lattice earthwork pipe bag body and cavity filler, wherein the annular cavity lattice earthwork pipe bag body is in a closed annular shape and is made of geotextile, the annular cavity lattice earthwork pipe bag body is evenly divided into a plurality of cavity lattices by an inner lattice, and a filling cuff is arranged above each cavity lattice and is used for filling the cavity filler into the annular cavity lattice earthwork pipe bag body in a segmented manner through the filling cuffs; the inner grid and the filling cuffs are made of the same material as the circular cavity grid earthwork tube bag body, and after filling is finished, the filling cuffs are closed by a bag sewing machine and then lie on the circular cavity grid earthwork tube bag body; the filler in the cavity is coarse sand mixed with water, and the filler in the cavity is filled into the annular cavity grid geotechnical pipe bag body through a grouting pump through a pipeline.

The invention has the following remarkable effects and advantages:

according to the ring-type cavity-grid geotechnical tube bag structure, the deformation of sludge in the ring is restrained and the stability of the ring is maintained by utilizing the tension generated when the ring-type cavity-grid geotechnical tube bag is extruded by the sludge in the annular area to deform; by utilizing the drainage and filtration functions of the soil engineering pipe bag, the sludge in the ring can achieve the effects of efficiently draining and reducing pollution. Compared with the traditional treatment technology of filling the dredged sludge into the straight tube type earthwork pipe bag, the pipe bag structure of the annular cavity lattice earthwork pipe bag provided by the invention has the advantages that the pipe bag material is greatly reduced, the volume of the treated sludge is large, and the construction cost is low.

Compared with the retaining structure for storing the sludge stacked by the traditional straight-tube type earthwork tube bag, the retaining structure for storing the sludge constructed by the annular cavity grid tube bag structure does not depend on the friction action among all layers of the tube bag, and has high stability; and each ring-shaped cavity grid tube bag monomer is formed by connecting a plurality of arc-shaped tube bags but not communicating, so that the whole body is formed, the damage of the local tube bag is ensured not to cause the damage of the whole monomer, the risk of the whole body damage caused by the local damage is reduced, and the construction is more convenient.

Drawings

FIG. 1 is a top view of a sludge storage retaining structure stacked using the annular cavity lattice geotextile tube bag structures of the present invention;

FIG. 2 isbase:Sub>A cross-sectional view A-A of FIG. 1;

FIG. 3 is a sectional view taken along line B-B of FIG. 1;

FIG. 4 is a schematic view of the filling process of the annular cavity grid geotextile tube bag structure of the present invention;

FIG. 5 is a schematic view of the completion of filling the annular cavity lattice geotextile tube bag structure of the present invention;

in the figure, 1, a ring-type cavity lattice earthwork tube bag structure; 2. sludge in the ring; 3. a horse way; 4. a geomembrane; 5. a drainage ditch; 6. a water diversion channel; 7. a purification tank; 8. an inner grid; 9. a cavity grid; 10. filling cuffs; 11. grouting pump; 12. a pipeline; 13. and (4) moisture.

Detailed Description

The present invention is described in detail below with reference to the accompanying figures 1-5.

The utility model provides a ring type chamber check geotechnique's pipe bag structure, includes ring type chamber check geotechnique's pipe bag body and intracavity and packs. As shown in fig. 4-5, the ring-type chamber geotube bag body is in a closed ring shape, is made of geotextile (woven or non-woven material), has a drainage and reverse filtration function, and has sufficient tensile strength; the annular cavity lattice geotextile tube bag body is evenly divided into a plurality of cavity lattices 9 by the inner lattices 8, and a filling cuff 10 is arranged above each cavity lattice 9 and is used for filling the filling materials in the cavity into the annular cavity lattice geotextile tube bag body in a segmented manner through the filling cuff 10; the inner grid 8 and the filling cuffs 10 are made of the same material as the circular cavity grid earthwork tube bag body, and after filling is finished, the filling cuffs 10 are closed by a bag sewing machine and then lie on the circular cavity grid earthwork tube bag body.

The filling material in the cavity is filling material with large water permeability, and is preferably coarse sand mixed with water. The filling in the cavity is filled into the annular cavity grid geotextile tube bag body by a grouting pump 11 through a pipeline 12. Because the ring-type cavity check geotextile tube bag body can filter water, water in the filler in the cavity can permeate out through the ring-type cavity check geotextile tube bag body.

The invention relates to an annular cavity lattice earthwork pipe bag structure, which is used for constructing a sludge storage and retaining structure, namely: a supporting and retaining structure for storing dredged sludge. When the annular cavity grid soil engineering pipe bag structure is used for constructing the sludge storage retaining structure, the filled annular cavity grid soil engineering pipe bag structures are vertically stacked or stacked along the height direction at a certain inclination angle, and the packway 3 is arranged after being stacked to a certain height and is used for ensuring the stability of a side slope and the convenience of traffic in the construction period.

Arranging drainage ditches 5 around the outer part of the lowest layer of the annular cavity grid earthwork pipe bag structure 1, and communicating the drainage ditches with a purification pond 7 through a water guide channel 6, wherein the annular sludge 2 is sludge dredged from a river, lake and pond; the geomembrane 4 is laid at the bottoms of the annular cavity grid geotechnical pipe bag structure 1, the annular silt 2, the drainage ditch 5, the water guide channel 6 and the purification tank. The sludge 2 in the ring passes through the contact surface between the layers of the geotechnical pipe bag structure 1 with the ring-shaped cavity lattice, the moisture contained in the sludge is discharged into the drainage ditch 5, and the moisture collected by the drainage ditch 5 leads the drainage to the purification tank 7 through the water guide channel 6 for centralized purification treatment. Pollutants such as heavy metals may exist in the water discharged by the sludge 2 in the ring, and the geomembrane 4 is laid to prevent the water discharged by the sludge 2 in the ring from directly permeating into the earth surface to pollute the underground water.

The specific construction method comprises the following steps:

I. cleaning and leveling a site needing to store sludge;

II. Excavating a drainage ditch 5, a water guide 6 and a purification tank 7, and cleaning;

and III, laying a geomembrane 4. Before laying, checking whether the field, the drainage ditch 5, the water guide channel 6 and the purification tank 7 are cleaned completely, and preventing sharp objects from puncturing the geomembrane;

and IV, laying a first layer of ring-type cavity lattice earthwork pipe bag structure 1. The pipeline 12 is respectively connected with a filling cuff 10 and a grouting pump 11 above the circular cavity grid geotechnical pipe bag body 1, and the filling in the cavity is filled into each cavity grid 9 of the circular cavity grid geotechnical pipe bag body through the pipeline 12 and the filling cuff 10 by the grouting pump 11, so that each section of cavity grid of the circular cavity grid geotechnical pipe bag body is fully filled;

the specification of the annular cavity lattice geotextile tube bag body can be determined according to the amount of the sludge stored and available fields near the engineering.

V, sealing the filling cuffs 10, compacting the filled ring-type cavity lattice geotextile tube bag structure 1, and simultaneously ensuring that water in the filling material in the cavity is discharged; a roller compactor may be used for compaction.

VI, laying a second layer of the ring-type cavity lattice earthwork pipe bag structure 1 above the compacted ring-type cavity lattice earthwork pipe bag structure 1, and repeating the steps IV and V until the ring-type cavity lattice earthwork pipe bag structure 1 is stacked to the first-stage horse way 3;

VII, conveying the cleaned sludge into an annular area formed by the annular cavity grid geotextile tube bag structure 1, and then repeating the steps IV to VI to construct the topmost layer.

Claims

1. The ring-type cavity lattice geotextile tube bag structure is characterized by comprising a ring-type cavity lattice geotextile tube bag body and cavity fillers, wherein the ring-type cavity lattice geotextile tube bag body is in a closed ring shape and is made of geotextile, the ring-type cavity lattice geotextile tube bag body is evenly divided into a plurality of cavity lattices (9) by inner lattices (8), and a filling cuff (10) is arranged above each cavity lattice (9) and is used for filling the cavity fillers into the ring-type cavity lattice geotextile tube bag body in a segmented manner through the filling cuff (10); the inner grid (8) and the filling cuffs (10) are made of the same material as the circular cavity grid earthwork tube bag body, and after filling is finished, the filling cuffs (10) are closed by a bag sewing machine and then lie on the circular cavity grid earthwork tube bag body; the filler in the cavity is coarse sand mixed with water, and the filler in the cavity is filled into the annular cavity grid geotechnical pipe bag body by a grouting pump (11) through a pipeline (12).