Geotextile bag suitable for capillary barrier, slope protection structure and construction method of slope protection structure

Abstract

The invention discloses a geotechnical bag suitable for a capillary barrier, a slope protection structure and a construction method of the geotechnical bag and the slope protection structure, and belongs to the field of slope engineering.The geotechnical bag comprises a prismatic table-shaped bag body, and the interior of the bag body is divided into a first filling cavity, a second filling cavity and a third filling cavity from left to right through two first geogrids which are arranged in parallel; the interior of the bag body is filled with aggregate through the first filling cavity, the second filling cavity and the third filling cavity, and the aggregate comprises coarse aggregate filled in the first filling cavity, fine aggregate filled in the second filling cavity and organic soil filled in the third filling cavity. According to the geobag suitable for the capillary barrier, the slope protection structure and the construction method of the geobag, the internal structure of the geobag is partitioned through the geogrid, a continuous protection wall is formed, the problems that a traditional geobag is poor in integrity, low in strength, prone to damage and not prone to degradation can be effectively solved, the safety and stability of a project are improved, and the service life of the geobag is prolonged. Meanwhile, good environment-friendly performance is also realized.

Description

Technical Field

[0001] The invention relates to the technical field of slope engineering, and in particular to a geotextile bag suitable for a capillary barrier, a slope protection structure and a construction method thereof. Background Art

[0002] In slope protection projects, the capillary barrier system (GBS) prevents rainwater from infiltrating through the capillary retardation effect between the coarse / fine particle layers in the geobag. This design makes it difficult for the coarse particle layer to crack under the influence of dry-wet cycles and thermal expansion and contraction, ensuring the stability and durability of the system. As an important bearing structure of organic soil and coarse / fine particles, geobags are the most important component of GBS and have good protection effect and economy.

[0003] However, in order to achieve the setting of coarse and fine aggregates, traditional geobags often require several geobags to be stacked, and their integrity is poor. They have problems such as low strength, easy breakage, and difficulty in degradation. This not only affects the quality and safety of the project, but also brings pressure to the environment. Summary of the invention

[0004] The purpose of the present invention is to propose a geobag suitable for capillary barrier, a slope protection structure and a construction method thereof in order to solve the problems that traditional geobags often need to be stacked to achieve the arrangement of coarse and fine aggregates, have poor integrity, and have the problems of low strength, easy damage and difficulty in degradation.

[0005] In order to achieve the above object, the present invention adopts the following technologies:

[0006] A geobag suitable for a capillary barrier comprises a prism-shaped bag body, the interior of the bag body being divided from left to right into a first filling cavity, a second filling cavity and a third filling cavity by two first geogrids arranged in parallel, and the interior of the bag body is filled with aggregates through the first filling cavity, the second filling cavity and the third filling cavity.

[0007] As a further description of the above technical solution: the aggregate includes coarse aggregate filled in the first filling cavity, fine aggregate filled in the second filling cavity, and organic soil filled in the third filling cavity.

[0008] As a further description of the above technical solution: the third filling cavity is divided into a first cavity and a second cavity distributed vertically by a second geogrid connected to the first geogrid, and the organic soil is uniformly filled in the first cavity and the second cavity.

[0009] As a further description of the above technical solution: the organic soil in the first chamber is divided into five equal parts by a third geogrid which is arranged vertically to the second geogrid.

[0010] As a further description of the above technical solution: the bag body is made of polyester fiber material, and the coarse aggregate and fine aggregate are both made of recycled asphalt pavement gravel soil.

[0011] A slope protection structure is provided, wherein the slope protection structure is formed by stacking a plurality of slope protection units in sequence along a slope, wherein the slope protection units include any one of the geobags described above.

[0012] As a further description of the above technical solution: the geobag includes a first standard bag and a second standard bag, the slope protection unit includes a first slope protection layer and a second slope protection layer arranged in parallel, and the first slope protection layer and the second slope protection layer are connected through a fourth geogrid.

[0013] As a further description of the above technical solution: the first slope protection layer is formed by connecting a plurality of first standard bags in sequence along the horizontal direction, and the second slope protection layer is formed by connecting a plurality of first standard bags and two second standard bags in sequence along the horizontal direction.

[0014] As a further description of the above technical solution: the first standard bags of the first slope protection layer and the first standard bags of the second slope protection layer are arranged in a staggered manner, and the two second standard bags of the second slope protection layer are located at the top positions of both ends of the first slope protection layer.

[0015] A construction method for a slope protection structure comprises the following steps:

[0016] S1. Geobag production: put the aggregate into the bag body, and put the coarse aggregate, fine aggregate and organic soil into the first filling cavity, the second filling cavity and the third filling cavity in turn, and then seal the mouth of the bag body to ensure that the filling will not leak out. The geobag of standard length is the first standard bag, and the geobag with half the length of the first standard bag is the second standard bag;

[0017] S2. Making slope protection units: connecting a plurality of first standard bags by tying tapes to form a first slope protection layer, connecting a plurality of first standard bags and two second standard bags by tying tapes to form a second slope protection layer, the first slope protection layer and the second slope protection layer have the same length and the first standard bags of the two slope protection layers are arranged in a staggered manner, and then connecting the first slope protection layer and the second slope protection layer by a fourth geogrid and tying tapes;

[0018] S3. Slope protection arrangement: The manufactured slope protection units are stacked and laid on the slope in sequence along the slope, and adjacent slope protection units are connected by binding belts and geogrids.

[0019] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0020] 1. Good integrity and convenient construction: Geogrids are used to partition the internal structure of the geotextile belt, and are also used as connecting structures to connect multiple geobags to form a continuous protective wall. After production, the geobags can be transported to the slopes that need to be reinforced for arrangement and installation. The construction is convenient and fast, which can effectively improve the project efficiency.

[0021] 2. Good environmental protection: The organic soil in the upper geobag is used to plant green vegetation, which can not only stabilize the upper structure, but also has the characteristics of green and beautiful appearance. The design of GBS allows plants to grow on it, which not only reduces the impact on the ecological environment, but also can be used in combination with plant protection methods to achieve drainage and anti-seepage, and can also strengthen the fine / coarse grain layer through plant roots. In addition, the transpiration of plants is also important for the recovery of the GBS system after heavy rainfall. Therefore, GBS geobags can not only achieve slope protection, but also take into account the ecological protection of the slope, and better meet the needs of environmental protection;

[0022] 3. Excellent durability: The structural design of the capillary barrier system (GBS) is to prevent rainwater from infiltrating through the capillary blocking effect between the fine / coarse grain layers in the lower geobag. This structural setting makes it difficult for the coarse grain layer to crack under the influence of dry-wet cycles and thermal expansion and contraction, ensuring the stability and durability of the system;

[0023] 4. Effectively inhibit soil cracking: The coarse-grained layer in the geobag acts as a sand-interlayer, which affects the rising speed and height of capillary water, and can effectively reduce the risk of cracking of the slope soil layer below due to evaporation. At the same time, the large pores of the coarse-grained layer play a role in thermal insulation, further reducing soil cracks caused by thermal expansion and contraction. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of a slope protection structure provided according to an embodiment of the present invention is shown;

[0025] Figure 2 A front view of a slope protection structure provided according to an embodiment of the present invention is shown;

[0026] Figure 3 It shows a schematic structural diagram of a slope protection unit provided according to an embodiment of the present invention;

[0027] Figure 4 A cross-sectional view of a geobag provided according to an embodiment of the present invention is shown;

[0028] Figure 5 A top view of a geobag provided according to an embodiment of the present invention is shown;

[0029] Figure 6 A side cross-sectional view of a first standard bag provided according to an embodiment of the present invention is shown;

[0030] Figure 7 A side cross-sectional view of a second standard bag provided according to an embodiment of the present invention is shown.

[0031] Legend:

[0032] 1. Geobag;

[0033] 10, first standard bag; 20, second standard bag;

[0034] 11. bag body; 12. first geogrid; 13. first filling cavity; 14. second filling cavity; 15. third filling cavity; 151. first chamber; 152. second chamber; 16. second geogrid; 17. aggregate; 171. coarse aggregate; 172. fine aggregate; 173. organic soil; 18. third geogrid;

[0035] 2. The fourth geogrid. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Reference Figure 1-Figure 7 The present embodiment provides a geobag suitable for a capillary barrier, comprising a prism-shaped bag body 11, the interior of the bag body 11 being divided from left to right into a first filling cavity 13, a second filling cavity 14 and a third filling cavity 15 by two first geogrids 12 arranged in parallel, and the interior of the bag body 11 is filled with aggregate 17 through the first filling cavity 13, the second filling cavity 14 and the third filling cavity 15.

[0038] In the present invention, the right side surface of the prism-shaped bag body 11 is perpendicular to the bottom surface, and the left side surface thereof is inclined to the left at 45 degrees with the bottom surface. The internal structure of the bag body 1 is partitioned by two first geogrids 12 parallel to the left inclined surface. The first geogrid 12 divides the interior of the bag body 11 into a first filling cavity 13, a second filling cavity 14 and a third filling cavity 15, thereby enabling the filling of different aggregates 17, so that the same geobag 1 can realize the setting of coarse and fine aggregates, thereby making the geobag 1 have good integrity.

[0039] Specifically, Figure 4 and Figure 5 As shown, the aggregate 17 includes coarse aggregate 171 filled in the first filling cavity 13 , fine aggregate 172 filled in the second filling cavity 14 , and organic soil 173 filled in the third filling cavity 15 .

[0040] Among them, the filling of aggregate 17 can increase the weight of the geobag 1 and improve its stability. The design of coarse aggregate 171 and fine aggregate 172 prevents rainwater from infiltrating through the capillary barrier effect between the fine / coarse grain layer, so that the coarse grain layer is not easy to crack under the influence of dry-wet cycle and thermal expansion and contraction, thereby ensuring the stability and durability of the geobag 1. The organic soil 173 is used to plant green vegetation, which can not only stabilize the upper structure, but also has the characteristics of green and beautiful appearance. Plants can grow on the organic soil 173, which not only reduces the impact on the ecological environment, but also can be used in combination with plant protection methods to achieve drainage and anti-seepage, and can also reinforce the fine / coarse grain layer through the plant root system;

[0041] It should be noted that the bag body 11 is made of polyester fiber material, and the coarse aggregate 171 and the fine aggregate 172 are both made of recycled asphalt pavement gravel soil. The bag body 11 made of high-strength polyester fiber has high tensile strength and durability, and the coarse aggregate 171 and the fine aggregate 172 made of recycled asphalt pavement gravel soil include recycled asphalt pavement fine-grained soil and recycled asphalt pavement coarse-grained soil with good particle size. The filler can effectively increase the weight and stability of the geotextile bag 1, and can also recycle and reuse the discarded pavement asphalt material without causing pollution to the environment.

[0042] Specifically, Figure 4 As shown, the third filling cavity 15 is divided into a first chamber 151 and a second chamber 152 distributed vertically by a second geogrid 16 connected to the first geogrid 12 , and organic soil 173 is uniformly filled in the first chamber 151 and the second chamber 152 .

[0043] Among them, the organic soil 173 is divided into upper and lower layers through the second grid 16, and different layers of soil can be treated or improved differently according to engineering needs and design requirements. Soil with stronger bearing capacity can be used in the lower layer or appropriate reinforcement materials can be added to improve the stability of the overall geobag 1, while soil that is more suitable for plant growth can be selected in the upper layer. At the same time, the layered design enables each layer of soil to bear its specific load and stress, thereby improving the stability of the geobag 1.

[0044] Specifically, Figure 5-Figure 7 As shown, the organic soil 173 in the first chamber 151 is divided into five equal parts by the third geogrid 18 arranged vertically to the second geogrid 16. The overall shape of each unit soil body divided into five equal parts is a prism. The third geogrid 18 can further improve the stability of the geobag, and at the same time separate the organic soil in the upper layer. The equal division provides a wider development space for the root system of the plant, avoids entanglement and competition between the root systems, and is conducive to the healthy growth and expansion of the root system.

[0045] A slope protection structure is formed by stacking a plurality of slope protection units in sequence along a slope, wherein the slope protection unit comprises a geobag 1 as described in any one of the above items, wherein the geobag 1 comprises a first standard bag 10 and a second standard bag 20, and wherein the slope protection unit comprises a first slope protection layer and a second slope protection layer arranged in parallel, wherein the first slope protection layer and the second slope protection layer are connected via a fourth geogrid 2.

[0046] Among them, the first standard bag 10 and the second standard bag 20 have the same shape, and the length and height of the two are the same. The width of the second standard bag 20 is half of the width of the first standard bag 10. The slope protection units are stacked in sequence along the slope. Due to the existence of the slope gradient, the organic soil 173 part of the geotextile bag 1 separated by the geogrid is exposed in a stepped manner to facilitate the planting of green plants. When the root system of the green plants is fully developed, it can play a role in strengthening the support, thereby maximizing the overall reinforcement effect of the geotextile bag 1.

[0047] Specifically, Figure 1-Figure 3 As shown, the first slope protection layer is formed by connecting a plurality of first standard bags 10 in sequence along the horizontal direction, and the second slope protection layer is formed by connecting a plurality of first standard bags 10 and two second standard bags 20 in sequence along the horizontal direction. The first standard bags 10 of the first slope protection layer and the first standard bags 10 of the second slope protection layer are arranged in an alternating manner, and the two second standard bags 20 of the second slope protection layer are located at the top positions at both ends of the first slope protection layer.

[0048] Among them, in the six-meter-long standard section, the first standard bags 10 and the second standard bags 20 are arranged alternately, with four first standard bags 10 arranged on the bottom layer, and three first standard bags 10 and two second standard bags 20 arranged on the upper layer, of which two second standard bags 20 are arranged on both sides and three first standard bags 10 are arranged in the middle. These two arrangement structures are progressive and arranged in turn. This unique arrangement method can maximize the capillary barrier effect of organic soil 173 and coarse and fine soil particles, thereby increasing the stability of slope protection.

[0049] A construction method for a slope protection structure comprises the following steps:

[0050] S1. Geobag production: put the aggregate 17 into the bag body 11, and put the coarse aggregate 171, the fine aggregate 172 and the organic soil 173 into the first filling cavity 13, the second filling cavity 14 and the third filling cavity 15 in sequence, and then seal the mouth of the bag body 11 to ensure that the filling does not leak out. The geobag 1 of standard length is the first standard bag 10, and the geobag 1 of half the length of the first standard bag 10 is the second standard bag 20;

[0051] S2. Making slope protection units: connecting a plurality of first standard bags 10 by binding tapes to form a first slope protection layer, connecting a plurality of first standard bags 10 and two second standard bags 20 by binding tapes to form a second slope protection layer, the first slope protection layer and the second slope protection layer have the same length and the first standard bags 10 of the two slope protection layers are arranged in a staggered manner, and then connecting the first slope protection layer and the second slope protection layer by a fourth geogrid 2 and binding tapes;

[0052] S3. Slope protection arrangement: The manufactured slope protection units are stacked and laid on the slope in sequence along the slope, and adjacent slope protection units are connected by binding belts and geogrids.

[0053] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A geobag suitable for capillary barrier, characterized in that: The invention comprises a prism-shaped bag body (11), the interior of the bag body (11) being divided from left to right into a first filling cavity (13), a second filling cavity (14) and a third filling cavity (15) by two first geogrids (12) arranged in parallel, and the interior of the bag body (11) is filled with aggregate (17) through the first filling cavity (13), the second filling cavity (14) and the third filling cavity (15).

2. A geobag suitable for capillary barrier according to claim 1, characterized in that: The aggregate (17) includes coarse aggregate (171) filled in the first filling cavity (13), fine aggregate (172) filled in the second filling cavity (14), and organic soil (173) filled in the third filling cavity (15).

3. A geobag suitable for capillary barrier according to claim 2, characterized in that: The third filling cavity (15) is divided into a first cavity (151) and a second cavity (152) distributed vertically by a second geogrid (16) connected to the first geogrid (12), and the organic soil (173) is evenly filled in the first cavity (151) and the second cavity (152).

4. A geobag suitable for capillary barrier according to claim 3, characterized in that: The organic soil (173) in the first chamber (151) is divided into five equal parts by a third geogrid (18) arranged vertically to the second geogrid (16).

5. A geobag suitable for capillary barrier according to claim 2, 3 or 4, characterized in that: The bag body (11) is made of polyester fiber material, and the coarse aggregate (171) and the fine aggregate (172) are both made of recycled asphalt pavement gravel soil.

6. A slope protection structure, characterized in that: The slope protection structure is formed by stacking a plurality of slope protection units in sequence along the slope, and the slope protection unit comprises the geobag (1) according to any one of claims 1 to 4.

7. A slope protection structure according to claim 6, characterized in that: The geotextile bag (1) comprises a first standard bag (10) and a second standard bag (20), and the slope protection unit comprises a first slope protection layer and a second slope protection layer arranged in parallel, wherein the first slope protection layer and the second slope protection layer are connected via a fourth geogrid (2).

8. A slope protection structure according to claim 7, characterized in that: The first slope protection layer is formed by connecting a plurality of first standard bags (10) in sequence in a horizontal direction, and the second slope protection layer is formed by connecting a plurality of first standard bags (10) and two second standard bags (20) in sequence in a horizontal direction.

9. A slope protection structure according to claim 8, characterized in that: The first standard bags (10) of the first slope protection layer and the first standard bags (10) of the second slope protection layer are arranged in a staggered manner, and the two second standard bags (20) of the second slope protection layer are located at the top positions of both ends of the first slope protection layer.

10. A construction method for a slope protection structure, characterized in that: The following steps are involved: S1. Geobag production: Aggregates (17) are loaded into a bag body (11). When loading, coarse aggregates (171), fine aggregates (172) and organic soil (173) are loaded into a first filling cavity (13), a second filling cavity (14) and a third filling cavity (15) in sequence. Then, the mouth of the bag body (11) is sealed to ensure that the filling material does not leak out. A geobag (1) of standard length is a first standard bag (10), and a geobag (1) of half the length of the first standard bag (10) is a second standard bag (20); S2, manufacturing a slope protection unit: connecting a plurality of first standard bags (10) by means of a binding belt to form a first slope protection layer, connecting a plurality of first standard bags (10) and two second standard bags (20) by means of a binding belt to form a second slope protection layer, the first slope protection layer and the second slope protection layer have the same length and the first standard bags (10) of the two slope protection layers are arranged in a staggered manner, and then connecting the first slope protection layer and the second slope protection layer by means of a fourth geogrid (2) and a binding belt; S3. Slope protection arrangement: The manufactured slope protection units are stacked and laid on the slope in sequence along the slope, and adjacent slope protection units are connected by binding belts and geogrids.

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