Heightening and reinforcing structure for old cofferdam

Abstract

The utility model provides an old cofferdam heightening and reinforcing structure. The old cofferdam heightening and reinforcing structure comprises a plurality of reinforcing layers, a lime soil layer, a broken stone hardcore, a stone chip layer and a surface protecting layer. The reinforcing layer is composed of a plurality of pieces of filling bagged sand. The lime soil layer is laid on the reinforcing layer on the topmost layer; the broken stone hardcore is laid on the lime soil layer; the stone chip layer is laid on the broken stone hardcore; the surface protection layer is laid on the side surface of the reinforcing layer; the reinforcing layer is formed by filling a plurality of sand bags, the sand bags are formed by filling sand around the cofferdam into the filling bags, local materials are used, the construction speed is high, the construction cost is reduced, damage to the natural environment is reduced, and meanwhile the transportation cost is reduced. The cofferdam is heightened and reinforced by filling the bagged sand reinforcing layer, washing of water flow is prevented through the surface protecting layer on the side face, the lime soil layer, the broken stone hardcore and the stone chip layer are laid on the top face of the reinforcing layer, and the effect of heightening and reinforcing an original old cofferdam is achieved.

Description

TECHNICAL FIELD

[0001] The embodiments of the present application relate to the field of building, in particular to heightening and reinforcing of old cofferdam. BACKGROUND

[0002] Cofferdam structure is a boundary of reclamation formed by artificial cofferdam on the sea, which prepares for later reclamation and land reclamation. The existing cofferdam structure forms include soil cofferdam, stone wall cofferdam, pile cofferdam, etc. These structures have problems of high construction material transportation cost, easy sliding, easy scouring, etc. CONTENT OF THE UTILITY MODEL

[0003] The following is a summary of the subject matter of the detailed description. This summary is not intended to limit the scope of the claims.

[0004] The purpose of the present application is to solve one of the problems in the related art, and the embodiments of the present application provide a cofferdam reinforcing structure.

[0005] In the first aspect of the present application, a cofferdam reinforcing structure comprises:

[0006] A plurality of reinforcing layers, each of which is composed of a plurality of sand bags filled with sand;

[0007] A lime-soil layer, which is laid on the topmost reinforcing layer;

[0008] A crushed stone cushion layer, which is laid on the lime-soil layer;

[0009] A stone chip layer, which is laid on the crushed stone cushion layer;

[0010] A facing layer, which is laid on the side of the reinforcing layer.

[0011] According to some embodiments of the first aspect of the present application, a woven cloth layer is arranged between the reinforcing layer and the original cofferdam.

[0012] According to some embodiments of the first aspect of the present application, the woven cloth layer is composed of a plurality of woven cloths which are overlapped, and the distance between adjacent woven cloths is greater than or equal to 1 meter.

[0013] According to some embodiments of the first aspect of the present application, the sand bag is provided with a drawbar for controlling the height.

[0014] According to some embodiments of the first aspect of the present application, the diameter of the filling port of the sand bag is 30 centimeters, the length of the sleeve is 20 centimeters, and the distance between the sleeves is 4 meters.

[0015] According to some embodiments of the first aspect of the present application, the sand bag is provided with a hoop band in the transverse direction and a tight fixing band in the longitudinal direction.

[0016] According to some embodiments of the first aspect of the application, the height of the clay layer is 350 mm.

[0017] According to some embodiments of the first aspect of the application, the height of the gravel cushion layer is 100 mm.

[0018] According to some embodiments of the first aspect of the application, the height of the stone chip layer is 50 mm.

[0019] According to some embodiments of the first aspect of the application, the height of each of the reinforcing layers is in the range of 50 cm to 80 cm.

[0020] The above scheme has at least the following beneficial effects: the dike reinforcing structure formed by the multiple reinforcing layers, the clay layer, the gravel cushion layer, the stone chip layer and the facing layer can realize the heightening and reinforcing of the original dike; the reinforcing layer is filled with sand in the filling bags, the sand bags are filled with sand around the dike in the filling bags, which realizes local material procurement, reduces construction cost and damage to the natural environment, and reduces transportation cost. The dike is heightened and reinforced by the reinforcing layer filled with sand in the filling bags, the side facing layer prevents water flow from scouring, and the clay layer, the gravel cushion layer and the stone chip layer are laid on the top surface of the reinforcing layer, which realizes the heightening and reinforcing of the original dike. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings are used to provide a further understanding of the technical scheme of the application, and constitute a part of the specification, and are used together with the embodiments of the application to explain the technical scheme of the application, and do not constitute a limitation on the technical scheme of the application. The reinforcing layer is filled with multiple sand bags

[0022] Figure 1 is a structural view of the dike reinforcing structure and the original dike;

[0023] Figure 2 is a structural view of the dike reinforcing structure from another direction. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the application more clear, the application is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the application, and do not limit the application.

[0025] It should be noted that although the functional modules are divided in the device schematic diagram, and the logical sequence is shown in the flowchart, in some cases, the steps shown or described can be performed in a manner different from the module division in the device or the sequence in the flowchart. The terms "first", "second", etc. in the specification, claims or above-mentioned drawings are used to distinguish similar objects, and do not necessarily describe a specific order or sequence.

[0026] The embodiments of the present application are further described below with reference to the accompanying drawings.

[0027] The embodiments of the present application provide an old embankment heightening and reinforcing structure.

[0028] Referring to Figure 1 and Figure 2 , the old embankment heightening and reinforcing structure comprises a reinforcing layer 4, a clay layer 1, a gravel cushion layer 2, a stone chip layer 3 and a facing layer 5.

[0029] Each reinforcing layer 4 is composed of a plurality of sand bags filled with sand. The clay layer 1 is laid on the topmost reinforcing layer 4. The gravel cushion layer 2 is laid on the clay layer 1. The stone chip layer 3 is laid on the gravel cushion layer 2. The facing layer 5 is laid on the side surface of the reinforcing layer 4.

[0030] It can be understood that the old embankment heightening and reinforcing structure is laid on the basis of the original embankment. The new embankment formed by laying the embankment reinforcing structure on the original embankment has substantially the same shape as the original embankment.

[0031] The sand bags are filled with sand around the embankment by filling bags. The materials are taken from the site, the construction speed is fast, the construction cost is minimized, the damage to the natural environment is reduced, and the transportation cost is reduced. The top surface of the reinforcing layer 4 is laid and reinforced by the clay layer 1, the gravel cushion layer 2 and the stone chip layer 3, and the side surface of the reinforcing layer 4 is reinforced by the facing layer 5, which plays a role in preventing erosion and improves the heightening and reinforcing effect of the old embankment.

[0032] A woven cloth layer 6 is arranged between the reinforcing layer 4 and the original embankment.

[0033] The woven cloth layer 6 is formed by overlapping a plurality of woven cloths, and the distance between adjacent woven cloths is greater than or equal to 1 meter. Of course, in other embodiments, according to the actual scene, the distance between adjacent woven cloths can also be other lengths.

[0034] The sand bag is provided with a pull bar for controlling the height.

[0035] The diameter of the filling port of the sand bag is 30 cm, the length of the sleeve is 20 cm, and the distance between the sleeves is 4 m. Of course, in other embodiments, according to the actual scene, the sand bag can also adopt other sizes.

[0036] The sand bag is provided with a hoop band in the transverse direction and a tight fixing band in the longitudinal direction.

[0037] The height of the lime-soil layer 1 is 350 mm. Of course, in other embodiments, the height of the lime-soil layer 1 can also adopt other values according to actual scenes.

[0038] The height of the gravel cushion layer 2 is 100 mm. Of course, in other embodiments, the height of the gravel cushion layer 2 can also adopt other values according to actual scenes.

[0039] The height of the stone chip layer 3 is 50 mm. Of course, in other embodiments, the height of the stone chip layer 3 can also adopt other values according to actual scenes.

[0040] The height of each layer of the reinforcing layer 4 ranges from 50 cm to 80 cm. Of course, in other embodiments, the height of the reinforcing layer 4 can also adopt other values according to actual scenes.

[0041] The steps of laying the embankment reinforcing structure on the basis of the original embankment are as follows.

[0042] The sharp stones, blocks and sundries existing in the original embankment are cleaned.

[0043] The woven cloth is transported to the original embankment by land, and the transportation in the field is assisted by the construction road.

[0044] The woven cloths are overlapped, and the distance between adjacent woven cloths is greater than or equal to 1 m. The woven cloth needs to be as flat as possible to avoid twisting and wrinkling, and should be kept smooth with moderate tightness.

[0045] The reinforcing layer 4 is laid layer by layer through the sand bags.

[0046] The sand bag is made of filling bags filled with mud and sand. The filling bag is processed into a rectangle, and the width is based on the embankment section, with an increase of 3% for consideration of shrinkage during filling. The length is 50 m, and the length can be adjusted accordingly according to the site conditions during construction. The filling thickness of the sand bag is controlled at 50 cm to 80 cm, and 4 steel bars are arranged in each 9 square meters of the mold bag to control the thickness of the sand bag. The diameter of the filling port of the sand bag is 30 cm, the length of the sleeve is 20 cm, and the distance between the sleeves is 4 m. During the processing of the filling bag, a hoop band is arranged every 2 m in the transverse direction, and a tight fixing band is arranged in the longitudinal direction of the cloth bag, so as to fix and connect the upper and lower layers of the sand bag. Through the reinforcing effect, the overall stability of the sand bag and the reinforcing layer 4 formed by the sand bag is greatly improved, and the structure is stable and safe.

[0047] The filling bag is sewn by splicing, the splicing part is folded three layers, the width is 5-10 cm, and three rows are sewn by 35 three-strand nylon thread industrial sewing machine. The first row is sewn on the filling bag, and the other two rows are sewn after folding. The sewing is firm, and the strength is not less than 90% of the original fabric design strength. The splicing seams of each bag should not be too many, and the distance between adjacent splicing seams should be greater than 2 m, and the exposed part after section forming is not provided with splicing seam.

[0048] Considering that the longitudinal layering seam of the filling bag is not less than 3 m, each layer needs to be made into a special-shaped bag according to the actual situation to meet the staggered seam requirement. With the decrease of the section of the upper layer filling bag, the longitudinal production length increases accordingly. After sewing, folding and forming, it is stacked in a cool and dry place, and the size of the sand bag and the filling position are marked.

[0049] The filling material is fine sand with a clay content of less than 10%. The sand in the filling bag is sea sand, which can be obtained locally, thereby minimizing the construction cost and reducing the damage to the natural environment. When filling the sand in the filling bag, first fill along the long edge direction to avoid stress concentration and damage to the bag body, and frequently adjust the direction of the sand outlet during the filling process to prevent the bag body from being displaced and deformed due to uneven stress. When the bag body is fixed and no longer displaced, fill again until the desired filling degree is reached. The sand-filled bag has strong adaptability to soft soil foundation and is suitable for land formation projects using the hydraulic filling method.

[0050] During the filling process of the sand-filled bag, the bag body can be rolled back and forth on the top surface. When the sand bag is filled to a certain degree of fullness, knock the sand bag to rearrange the particles to be close, speed up the drainage and consolidation speed of the bag body, and when the entire sand bag reaches the screen paste stage, the sand-filled bag filling machine or the bag filling should be appropriately reduced to prevent the bag from bursting, and a certain consolidation and dehydration time should be left.

[0051] The filling height of the sand bag should be controlled at an appropriate level, and the filling height of each layer should be controlled between 50-80 cm. If the ideal height is not reached at one time during the filling process, the sand bag should be slightly consolidated and then filled again or multiple times until the ideal filling height is reached.

[0052] According to the actual situation on site, the sand-filled bag is basically filled on the original cofferdam or mud surface, and the sand-filled bag is mainly laid on land. Before laying, the cofferdam axis should be measured and positioned, the bag body should be stretched according to the positioning axis position, and the bag body should be fixed. The construction area is connected with the land pushing area, and the sand-filled bag can be transported to the laying area for direct laying.

[0053] According to the measured elevation, the accurate position of the upper layer filling bag is calculated. Mark the position to facilitate the laying of the sand bag.

[0054] During the filling and stacking of the reinforcement layer 4, the construction method of layering and synchronizing is adopted to advance forward, to ensure the good overlap between the adjacent bags. One end of the filling bag is laid on the filled sand bag to ensure the filling quality of the overlapping part and meet the length requirement of overlap.

[0055] The sand bags are overlapped between the upper and lower layers, and the length is greater than 3m to avoid the formation of wide gap affecting the filling quality of the dike.

[0056] After the sand bags are filled with sand, a 0.5m protective cushion layer is laid on the top surface of the sand bags, from bottom to top, 8% lime soil with a height of 350mm, gravel cushion layer 2 with a height of 100mm, and stone chip layer 3 with a height of 50mm, and a surface layer with a width of 10m to 12m is formed, which is a road for personnel and vehicles to pass through.

[0057] The above is a specific description of the preferred implementation of the present application, but the present application is not limited to the embodiments, and those skilled in the art can make various equivalent modifications or replacements without departing from the spirit of the present application. These equivalent modifications or replacements are all included in the scope defined by the claims of the present application.

Claims

1. An old embankment heightening and reinforcement structure, characterized in that: The application relates to a multi-layer reinforced layer, which comprises: a plurality of sand bags filled with sand; a lime-soil layer laid on the topmost reinforced layer; a gravel cushion layer laid on the lime-soil layer; a stone chip layer laid on the gravel cushion layer; a surface layer laid on the side of the reinforced layer.

2. The old embankment heightening and reinforcing structure according to claim 1, characterized by, A woven cloth layer is arranged between the reinforced layer and the original surrounding dike.

3. The old embankment heightening and reinforcing structure according to claim 2, characterized by, The woven cloth layer is formed by a plurality of woven cloths, and the distance between adjacent woven cloths is greater than or equal to 1 m.

4. The old embankment heightening and reinforcing structure according to claim 1, wherein The sand bag is provided with a drawbar for controlling the height.

5. The old embankment heightening and reinforcing structure according to claim 1, wherein The diameter of the filling opening of the sand bag is 30 cm, the length of the sleeve is 20 cm, and the distance between the sleeves is 4 m.

6. The old embankment heightening and reinforcing structure according to claim 1, wherein The sand bag is provided with a hoop band in the transverse direction and a tight fixing position band in the longitudinal direction.

7. The old embankment heightening and reinforcing structure according to claim 1, wherein The height of the lime-soil layer is 350 mm.

8. The old embankment heightening and reinforcing structure according to claim 1, wherein The height of the gravel cushion layer is 100 mm.

9. The old embankment heightening and reinforcing structure according to claim 1, wherein The height of the stone chip layer is 50 mm.

10. The old embankment heightening and reinforcing structure according to claim 1, wherein The height of each reinforced layer ranges from 50 cm to 80 cm.

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