Temporary dike separation structure on upper portion of soft sludge and construction method of temporary dike separation structure

Abstract

The invention discloses a soft sludge upper temporary dike structure and a construction method thereof.The dike structure is located above soft sludge and composed of geotechnical cloth and air cavity partitions, the geotechnical cloth is fully attached to the surface of the soft sludge in a target area, and the air cavity partitions are fixed to the geotechnical cloth in the transverse direction and the longitudinal direction; therefore, the integral separating embankment structure of the enclosure section capable of being filled with other materials in a blowing mode is formed. According to the invention, the geotextile and the air cavity partitions are attached to the soft sludge in a large area, so that the material density is low, and the material can stably float on the sludge; a plurality of stable enclosure spaces are formed through air cavity partitions, a protection interface is formed for subsequent hydraulic reclamation of other materials, and the influence of sludge and floating water on construction is isolated.

Description

Technical Field

[0001] This invention relates to a construction method for a temporary dike structure, specifically to a temporary dike structure on top of soft silt and its construction method. Background Technology

[0002] With the rapid economic development of coastal areas in my country, land demand is becoming increasingly tight, requiring a large amount of land resources for economic construction. Traditional inland soil is no longer sufficient to meet the growing needs of economic development, necessitating the utilization of marine silt from coastal or near-shore areas. This involves transforming marine silt into usable land resources. During the transformation of marine silt, the foundation is often too soft for vehicular and pedestrian access. Therefore, a temporary dike structure needs to be built on top of the soft silt to isolate it from water and facilitate subsequent construction and modification of other structures.

[0003] To construct a temporary dike structure on top of soft silt and stably suspend it above the soft silt and floating water, conventional methods are difficult to implement. For example, methods such as riprap (sand blowing) and sandbags (sand blankets) place sand and gravel aggregates in bulk or bagged form on the soft silt. These methods have a small volume, and because the density of sand and gravel aggregates is much higher than that of soft silt, these stockpiled materials easily sink into the soft silt and cannot form a stable temporary dike structure suspended on top of the soft silt. At the same time, sand and gravel aggregates are non-renewable materials, which are not environmentally friendly.

[0004] Therefore, further improvements and enhancements are needed to the construction methods and materials of conventional temporary dike structures to meet the requirements of temporary dike construction. A temporary dike structure for the upper part of soft silt is constructed to isolate the influence of flowing mud and water, and is used for subsequent filling with other solidification materials to form a monolithic cofferdam structure. Summary of the Invention

[0005] The present invention provides a temporary dike structure for soft silt and its construction method in order to solve the problems existing in the prior art.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is: a temporary dike structure on the upper part of soft silt, the dike structure is stably floating on the surface of soft silt, and is composed of geotextile and air cavity partitions, wherein the geotextile is fully attached to the soft silt in the target area, and the air cavity partitions are fixed on the geotextile.

[0007] The geotextile is composed of multiple geotextiles sewn together and tightly bonded to the soft silt, with a geotextile density of not less than 100 g / m³. 2 .

[0008] Furthermore, when the average water depth on the surface of the soft silt exceeds 30cm, an impermeable geotextile should be used; when the average water depth on the surface of the soft silt is less than 30cm, a permeable geotextile should be used.

[0009] The air cavity partition includes an air cavity inner tube and an air cavity outer mold, wherein the air cavity outer mold can be formed by sealing with geotextile or by sealing with geomembrane and sewing it onto the geotextile.

[0010] Furthermore, the air cavity partitions are fixed on the geotextile, and the air cavity partitions are fixed in the transverse and longitudinal directions of the geotextile to form multiple enclosed spaces that can be filled with other materials; wherein the transverse distance of the air cavity partitions is not less than 30m and the longitudinal distance is not less than 10m.

[0011] Furthermore, the height of the air cavity partition is not less than 0.8m, and the distance from its center point to the outer edge of the geotextile is not less than 2m.

[0012] Furthermore, when the geomembrane seal is formed and sewn onto the geotextile, air cavity fixing ends should be set at both ends of the air cavity partition. The air cavity fixing ends are sewn onto the geotextile, and the air cavity fixing ends and the air cavity outer mold are a whole. The length of the air cavity fixing ends at both ends is not less than 0.5m.

[0013] Furthermore, the air-filled inner tube is a fixed lightweight tubular structure or an inflatable membrane-sealed inner tube. The fixed tubular structure includes a lightweight plastic tube and a lightweight inner frame support. The cross-sectional shape of the air-filled inner tube is circular, elliptical, triangular, square, or rectangular.

[0014] To achieve a temporary dike structure on top of soft silt, a suitable construction method is also provided, which is as follows: determine the target area of ​​the dike structure on the soft silt and smooth the surface of the target area; lay the geotextile, which has been sewn into a whole, on the soft silt in the target area to ensure full contact with the soft silt and avoid air pockets; then, tightly sew air cavities into the geotextile to form air gaps.

[0015] Furthermore, the geotextile is laid flat on the soft silt in the target area. First, the geotextile is rolled into a whole roll, and then, along the direction of the target area, the rolled-up geotextile is unfolded while being pressed horizontally with a horizontal bar to make the geotextile densely embedded in the surface of the soft silt.

[0016] Furthermore, the geotextile is tightly stitched in both the transverse and longitudinal directions to form air chambers, creating multiple enclosed spaces that can be filled with other materials. If the inner tube of the air chamber is a geomembrane sealing inner tube, it needs to be inflated before the filling material is applied.

[0017] Furthermore, the dredged filling material can be fluidized solidified soil or fluid filling material such as plain concrete. After hardening, it forms an integral whole with the dike structure. When constructing the dredged filling material, a multi-point pouring method can be adopted, with 3-5 dredged filling points set in the middle of the enclosure block for dredged filling and pouring.

[0018] The technical principle of the dike structure in this invention, which is stably floating on the surface of soft silt, is as follows: Geotextile and air cavity baffles are lightweight baffle materials that can be stably suspended on the surface of soft silt. Through anchoring, multiple enclosed spaces are formed that can be filled with other materials. At the same time, the entire dike structure is composed of impermeable mud materials, which effectively isolates the soft silt from the inflow of the dike structure, laying the groundwork for the subsequent filling of other materials to form a stable cofferdam structure.

[0019] The present invention has the following beneficial effects: This invention improves the adhesion between the barrier structure and the soft silt by stably attaching a large area of ​​geotextile and air-filled baffles to the soft silt, thus fixing the entire dike structure to the surface of the soft silt. Furthermore, the entire dike structure is composed of geotextile and lightweight air-filled baffles, with a material density much lower than that of the silt, allowing it to float stably on the surface of the soft silt without sinking into it. The air-filled baffles create multiple stable enclosure spaces, forming a protective interface for subsequent filling with other materials, isolating the silt and floating water from the construction process. Simultaneously, the air-filled inner tubes used in the structure are made of recyclable materials, making it highly environmentally friendly. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A cross-sectional view of a temporary dike structure on the upper part of a weak silt, provided as an embodiment of the present invention.

[0022] Figure 2 A cross-sectional view of a circular air cavity provided in one embodiment of the present invention.

[0023] Figure 3 A cross-sectional view of a triangular air cavity provided in one embodiment of the present invention.

[0024] Figure 4 A cross-sectional view of a square air cavity provided in one embodiment of the present invention.

[0025] Figure 5A top view of a temporary dike structure on top of weak silt provided in an embodiment of the present invention.

[0026] Figure 6 A cross-sectional view of a temporary dike structure on top of a weak silt after being filled with other materials.

[0027] In the diagram: 1-soft silt, 2-geotextile, 3-air cavity partition, 32-air cavity fixed end, 321-air cavity inner tube, 322-air cavity outer mold, 4-enclosure space. Detailed Implementation

[0028] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0029] Combined with appendix Figure 1-6 This embodiment discloses a dike structure on the upper part of a soft silt. The dike structure floats stably on the surface of the soft silt 1 and is composed of geotextile 2 and air cavity partition 3. The geotextile 2 is fully attached to the soft silt 1 in the target area, and the air cavity partition 3 is fixed on the geotextile 2.

[0030] The geotextile 2 is composed of multiple geotextiles sewn together and tightly bonded to the soft silt 1, with a geotextile density of not less than 100 g / m³. 2 .

[0031] Furthermore, when the average water depth on the surface of the soft silt 1 exceeds 30cm, the geotextile 2 is made of impermeable geotextile, so that the geotextile 2 can float on the water surface; when the average water depth on the surface of the soft silt 1 is less than 30cm, the geotextile 2 is made of permeable geotextile, so that the geotextile 2 can have better contact and bonding with the soft silt 1.

[0032] The air cavity partition 3 includes an air cavity inner tube 321 and an air cavity outer mold 322, wherein the air cavity outer mold 322 can be formed by sealing geotextile 2, or it can be formed by sealing geomembrane and sewn onto geotextile 2.

[0033] Furthermore, the air cavity partition 3 is fixed on the geotextile 2, and the air cavity partition 3 is fixed in the transverse and longitudinal directions of the geotextile 2 respectively, forming multiple enclosure spaces 4 that can be filled with other materials; wherein the transverse distance of the air cavity partition 3 is not less than 30m and the longitudinal distance is not less than 10m.

[0034] Furthermore, the height of the air cavity partition 3 shall not be less than 0.8m, and the distance from its center point to the outer edge of the geotextile 2 shall not be less than 2m.

[0035] Furthermore, when the geomembrane seal is formed and sewn onto the geotextile 2, air cavity fixing ends 32 should be provided at both ends of the air cavity partition 3. The air cavity fixing ends 32 are sewn onto the geotextile 2. The air cavity fixing ends 32 and the air cavity outer mold 322 are a whole. The length of the air cavity fixing ends 32 at both ends is not less than 0.5m.

[0036] Furthermore, the air cavity inner tube 321 is a fixed lightweight tubular structure or an inflatable membrane-sealed inner tube. The fixed tubular structure includes a lightweight plastic tube and a lightweight inner frame support. The cross-sectional shape of the air cavity inner tube 321 is circular, elliptical, triangular, square, or rectangular.

[0037] To realize the temporary dike structure on the upper part of the soft silt, a suitable construction method is also provided, which is as follows: the target area of ​​the dike structure is determined on the soft silt 1, and the surface of the target area is flat and smooth; the geotextile 2, which is sewn into a whole, is laid flat on the soft silt 1 in the target area to ensure full contact with the soft silt 1 and avoid air gaps; then, air cavity partitions 3 are formed by tightly sewing on the geotextile 2.

[0038] Furthermore, the geotextile 2 is laid flat on the soft silt 1 in the target area. First, the geotextile 2 is rolled into a whole roll. Then, along the direction of the target area, the already rolled geotextile 2 is unfolded and pressed horizontally with a horizontal bar to make the geotextile 2 densely embedded in the surface of the soft silt 1.

[0039] Furthermore, the geotextile 2 is tightly stitched in the transverse and longitudinal directions to form air cavity partitions 3, forming multiple enclosed spaces 4 that can be filled with other materials; if the air cavity inner tube 321 of the air cavity partition 3 is a geomembrane sealing inner tube, it is necessary to inflate it before the filling material is constructed.

[0040] Furthermore, such as Figure 6 As shown, other materials are blew into the enclosure space 4 formed by the air cavity partition 3. The blew-in material can be fluidized solidified soil or fluid filling materials such as plain concrete. After hardening, it forms an integral whole with the dike structure. Other materials can be blew in using a multi-point pouring method, with 3-5 blew-in points set in the middle of the enclosure block 4. The purpose is to blew other materials into the middle of the enclosure block 4. After blew-in, the middle part settles first, forming a stable arc-shaped cross-section structure. The hardened blew-in material and the entire dike structure form a whole-plate cofferdam structure to resist seawater erosion, while its surface can also meet the requirements for vehicle traffic.

[0041] The above description is merely an optional embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A temporary dike structure on top of weak silt, characterized in that: The dike structure is stably floating on the surface of the soft silt (1) and is composed of geotextile (2) and air cavity partition (3); wherein the geotextile (2) is fully attached to the soft silt (1) in the target area, and the air cavity partition (3) is fixed on the geotextile (2).

2. The temporary dike structure on top of weak silt as described in claim 1, characterized in that: The geotextile (2) is made by sewing multiple geotextiles together and then tightly attaching them to the soft silt (1).

3. The temporary dike structure on top of weak silt as described in claim 1, characterized in that: The air cavity partition (3) includes an air cavity inner tube (321) and an air cavity outer mold (322), wherein the air cavity outer mold (322) can be formed by sealing geotextile (2) or by sealing geomembrane and sewing it onto geotextile (2).

4. The temporary dike structure on top of weak silt as described in claim 3, characterized in that: The air cavity inner tube (321) is a fixed lightweight tubular structure or an inflatable membrane-sealed inner tube. The fixed tubular structure includes a lightweight plastic tube and a lightweight skeleton inner support. The cross-sectional shape of the air cavity inner tube (321) is circular, elliptical, triangular, square or rectangular.

5. A construction method for a temporary dike structure on top of soft silt as described in claim 1, characterized in that: The target area of ​​the dike structure is determined on the soft silt (1), and the surface of the target area is smoothed. The geotextile (2) after being sewn into a whole is laid flat on the soft silt (1) of the target area to ensure full contact with the soft silt (1) and avoid air pockets. Then, air cavity partitions (3) are formed by tightly sewing on the geotextile (2).

6. The construction method for the temporary dike structure on top of weak silt as described in claim 5, characterized in that: The geotextile (2) is laid flat on the soft silt (1) in the target area. First, the geotextile (2) is rolled into a whole roll. Then, along the direction of the target area, the geotextile (2) is unfolded while being pressed horizontally with a horizontal bar so that the geotextile (2) is densely embedded in the surface of the soft silt (1).

7. The construction method for the temporary dike structure on top of weak silt as described in claim 5, characterized in that: The geotextile (2) is tightly stitched in the transverse and longitudinal directions to form air cavity partitions (3), forming multiple enclosed spaces (4) that can be filled with other materials; if the air cavity inner tube (321) of the air cavity partition (3) is a geomembrane sealing inner tube, it is necessary to blow air to fill it before the filling material is constructed.

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