A flexible drainage structure and construction method suitable for soil slopes

Abstract

The present invention discloses a flexible drainage structure and construction method suitable for soil slopes, which consists of a drainage ditch and an energy dissipation pool. The drainage ditch includes a drainage ditch excavated on the soil slope, a geobag, an anti-seepage geotextile, a lock and a fixing rope; the energy dissipation pool includes an energy dissipation pool ditch excavated at the head of the drainage ditch, energy dissipation piles, geobags, anti-seepage geotextiles, locks and fixing ropes. The geobags have X-shaped reinforcement strips and fixing rings on the front and back sides, and the anti-seepage geotextile is transversely provided with multiple high-strength hollow belts, and multiple openings are reserved in the middle of the hollow belts. The present invention completely adopts flexible materials, which can effectively avoid the cracking problem of rigid structures such as concrete. At the same time, the energy dissipation pool located at the head of the ditch can effectively reduce the scouring force of the water flow. The material selected for the structure is light, and the filler in the geobag can be made from local materials. The construction method is simple, which can effectively reduce the construction cost and construction difficulty of the soil slope drainage facilities, and at the same time extend the service life of the drainage facilities.

Description

Technical Field

[0001] The invention belongs to the technical field of slope drainage engineering, and in particular relates to a flexible drainage structure suitable for soil slopes and a construction method. Background Art

[0002] The existing soil slope drainage structure is mainly constructed with concrete. Due to the thermal expansion and contraction characteristics of the material and the consolidation and settlement of the soil, the drainage structure often cracks and breaks after a period of time after construction. Rainwater seeps into the cracks. Under the continuous erosion of rainwater, the soil at the broken part of the drainage structure is gradually washed away to form erosion caves, which forms a vicious cycle. The drainage structure is further damaged and completely loses its drainage function. Under the condition that the drainage cannot be drained smoothly, the slope is very likely to become unstable, causing greater harm. If flexible materials are used to construct the drainage structure, the cracking problem caused by thermal expansion and contraction of the material or consolidation and settlement of the soil can be effectively avoided, the erosion cave problem formed by rainwater erosion along the cracks can be reduced, the service life and drainage efficiency of the drainage structure can be improved, and the drainage structure can play a drainage role for a long time, providing guarantee for the safety and stability of the slope. Summary of the invention

[0003] The present invention provides a flexible drainage structure and construction method suitable for soil slopes, which can solve the problems existing in existing concrete drainage structures. At the same time, the construction material used in the present invention is smaller in size and lighter in weight than concrete materials, which can reduce the material handling cost and difficulty during construction.

[0004] In order to solve the above technical problems, the present invention provides a flexible drainage structure suitable for soil slopes, including a drainage ditch composed of a drainage ditch, a geobag, an impermeable geotextile, a lock and a fixing rope, and an energy dissipation pool composed of an energy dissipation pool ditch, an energy dissipation pile, a geobag, an impermeable geotextile, a lock and a fixing rope;

[0005] The shape of the drainage groove is trapezoidal or rectangular, and the specific size can be adjusted according to the drainage capacity requirements;

[0006] The trench of the stilling pool is dustpan-shaped, narrow at the end connecting the drainage ditch and wide at the opening. The specific size can be adjusted according to the drainage capacity requirements;

[0007] The geobag is provided with X-shaped reinforcement strips in the diagonal direction on both sides and sewn with fixing rings, wherein the reinforcement strips are made of tensile synthetic fiber material, and the fixing rings are made of metal material or tensile synthetic fiber material;

[0008] Multiple high-strength hollow belts need to be set horizontally in the anti-seepage geotextile. The spacing can be adjusted according to the specific project conditions and should not be too large;

[0009] There are multiple openings in the middle of the hollow belt, which can also be cut on site. The number and position of the openings are based on the principle of facilitating the insertion of the fixing rope;

[0010] The fixing rope is made of tensile synthetic fiber material or metal material, and lock buckles for fixing the geotextile are installed at both ends and in the middle of the fixing rope.

[0011] Preferably: the anti-seepage geotextile for the drainage ditch is placed in the drainage ditch groove, and multiple hollow belts need to be set in the transverse direction of the geotextile in advance. The hollow belts are used to pass the fixing ropes. The openings on the hollow belts are set according to the size of the drainage ditch. The openings are located on both sides of the bottom surface of the drainage ditch. The lock is connected to the fixing ring on the geobag to fix the anti-seepage geotextile.

[0012] Preferably: the anti-seepage geotextile for the energy dissipation pool is placed in a dustpan-shaped groove, and multiple hollow belts need to be set in the transverse direction of the geotextile in advance. The hollow belts are used to pass the fixing ropes. The opening positions on the hollow belts are set in a triangular shape according to the geobags. The lock is connected to the fixing ring on the geobag to fix the anti-seepage geotextile.

[0013] Preferably, the energy dissipation piles used in the energy dissipation pool are composed of geobags combined to form a specific shape, and are connected in pairs by fixing rings to form a whole.

[0014] The present invention also provides a construction method of a flexible drainage structure suitable for soil slopes, the method comprising the following steps:

[0015] ① Drainage ditch:

[0016] First, according to the drainage ditch design plan, a trapezoidal trench is excavated on the soil slope. Geobags are placed in the trench according to the fixed holes reserved in the hollow belt of the geotextile, and soil is backfilled between the gaps in the geobags.

[0017] The anti-seepage geotextile should be put through the fixing rope in the hollow belt in advance and the lock should be fixed, and then the anti-seepage geotextile should be laid, first at the bottom of the trench, and the lock should be locked with the fixing ring on the geobag placed previously, and then the gap between the geotextile and the trench wall should be backfilled;

[0018] Then, on both sides of the trench, a pit for placing geobags for fixing the geotextile is excavated according to the fixed holes reserved in the hollow belt of the geotextile, and the geobag is placed in the pit and the gap is backfilled;

[0019] Finally, lock the buckle on the fixing rope passed through the geotextile with the fixing ring on the geobag to complete the construction of the drainage ditch.

[0020] ②Stilling basin:

[0021] First, a dustpan-shaped trench is excavated at the head of the drainage ditch, and geobags are placed in the trench according to the fixed holes reserved on the hollow belt of the geotextile, and the gaps between the geobags are backfilled with soil;

[0022] The anti-seepage geotextile should be put through the fixing rope in the hollow belt in advance and the lock should be fixed, and then the anti-seepage geotextile should be laid, first at the bottom of the trench, and the lock should be locked with the fixing ring on the geobag placed previously, and then the gap between the geotextile and the trench wall should be backfilled;

[0023] Then, the geobags used to form the energy dissipation piles are arranged in a triangular shape and placed in the corresponding position of the reserved lock buckle in the middle of the anti-seepage geotextile, and the fixing ring is locked with the lock buckle on the geotextile. The energy dissipation piles are arranged in two rows, with only one pile in the row close to the drainage ditch, which is a regular triangle arrangement, and two piles in the second row, which is an inverted triangle arrangement;

[0024] Dig pits for geobags to fix the geotextile on both sides of the trench according to the fixed holes reserved in the hollow belt of the geotextile, place the geobags in the pits and backfill the gaps;

[0025] Finally, lock the buckle on the fixing rope passed through the geotextile with the fixing ring on the geobag to complete the construction of the energy dissipation pool.

[0026] A flexible drainage structure and construction method suitable for soil slopes in an embodiment of the present invention have the following beneficial effects:

[0027] The flexible drainage structure and construction method of the present invention can effectively solve the problem of cracking and damage of the drainage structure caused by the thermal expansion and contraction characteristics of concrete materials and the consolidation and settlement of the soil, effectively prevent rainwater from seeping into the cracks, and the soil is washed away by rainwater, resulting in complete destruction of the drainage channel, which in turn leads to slope instability. The service life and drainage efficiency of the drainage structure can be effectively improved, so that the drainage structure can play a long-term drainage role and provide protection for the safety and stability of the slope. At the same time, the material used in the structure is light, the filler in the geobag can be made from local materials, and the construction method is simple, which can effectively reduce the construction cost and construction difficulty of the soil slope drainage facilities, and at the same time extend the service life of the drainage facilities. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings that are necessary and practical in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 A schematic diagram of the cross-sectional structure of a flexible drainage structure drainage ditch suitable for soil slopes provided by the present invention;

[0030] Figure 2 A is an enlarged schematic diagram of an embodiment provided by the present invention;

[0031] Figure 3 A schematic top view of a drainage ditch according to an embodiment of the present invention;

[0032] Figure 4 B is an enlarged schematic diagram of an embodiment provided by the present invention;

[0033] Figure 5 A schematic diagram of the cross-sectional structure of an energy dissipation pool according to an embodiment of the present invention;

[0034] Figure 6 A schematic top view of an energy dissipation pool according to an embodiment of the present invention;

[0035] Figure 7 A schematic diagram of the longitudinal cross-section structure of an energy dissipation pool according to an embodiment of the present invention. DETAILED DESCRIPTION

[0036] In order to more clearly and completely introduce the technical solution of the present invention, the present invention is described in detail below in conjunction with the drawings in the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0037] As attached Figure 1 As shown, a flexible drainage structure suitable for earth slopes includes a slope soil body 4, a drainage ditch groove 3 and a shallow pit 7 for placing geobags are excavated on the surface of the slope soil body 4, an anti-seepage geotextile 2 is used as the surface of the drainage ditch, and a geobag 1 is used to fix the geotextile.

[0038] As attached Figure 2 , 4 As shown, it is a detailed enlarged view of the connection and fixing point of the geobag and the anti-seepage geotextile, including the geobag body 1, the anti-seepage geotextile body 2, the geobag fixing ring a, the geotextile X-shaped reinforcement strip c, the fixing rope 6 for fixing the anti-seepage geotextile, the hollow belt 5 for passing the fixing rope and the lock b for connecting the geotextile 2 and the geobag 1. Among them, the geobag body 1 adopts a composite material with polypropylene as the main raw material, and the anti-seepage geotextile adopts the form of two cloths and one film, and adopts a high-density polyethylene material film. The geobag fixing ring a adopts a stainless steel ring, and the geotextile X-shaped reinforcement strip is made of nylon. The fixing ring a is sewn on the geobag body 1 using the geotextile X-shaped reinforcement strip c, and the reinforcement strip c is sewn on both the front and back sides of the geobag body 1. The fixing rope 6 of the anti-seepage geotextile 2 is made of steel wire rope, the hollow belt 5 is made of nylon, and the lock buckle b is made of stainless steel. The hollow belt 5 is sewn at equal intervals (2m) along the transverse direction of the anti-seepage geotextile 2, and small holes are opened at the 2m and 3m positions of the hollow belt 5. The fixing rope 6 is passed through the middle of the hollow belt 5, and lock buckles b are installed at both ends of the fixing rope 6 and at the 2m and 3m positions respectively.

[0039] As attached Figure 1 As shown, after the excavation of the drainage ditch 3 is completed, the geobags at the bottom are placed, the gaps between the geobags are backfilled, the anti-seepage geotextile 2 is laid, the two middle locks b on the anti-seepage geotextile are locked with the fixing ring a on the bottom geobag, and the gap between the geobag and the ditch wall is backfilled. After the excavation of the shallow pit 7 is completed, the geobag is placed therein, the gaps are backfilled, and the locks at both ends of the anti-seepage geotextile are respectively locked with the fixing rings on the geobags placed on both sides to complete the construction of the drainage ditch.

[0040] As attached Figure 5 As shown, after the excavation of the energy dissipation pool trench 8 is completed, the geobags at the bottom are placed, the gaps between the geobags are backfilled, and the impermeable geotextile 2 is laid. The two lock buckles b in the middle of the impermeable geotextile are locked with the fixing ring a on the bottom geobag, and the gap between the geobag and the trench wall is backfilled. The geobags used to form the energy dissipation piles are placed in the corresponding positions of the reserved lock buckles in the middle of the impermeable geotextile in a triangular arrangement, and the three geobags are connected together using a fixing ring, and the fixing ring is locked with the lock buckle on the geotextile. The energy dissipation piles are arranged in two rows, and only one is set in a row close to the drainage ditch, which is a regular triangle arrangement, and two are set in the second row, which is an inverted triangle arrangement. After the excavation of the shallow pit 7 is completed, the geobags are placed therein, the gaps are backfilled, and the lock buckles at both ends of the impermeable geotextile are respectively locked with the fixing rings on the geobags placed on both sides to complete the construction of the drainage ditch.

[0041] In addition, when the present invention is in use, the soil excavated during trench excavation can be directly put into geobags, which saves time and effort, reduces the workload of transporting construction materials, and reduces the amount of earth that needs to be transported elsewhere later, killing two birds with one stone.

[0042] In fact, the size, shape, material, etc. of each structural component involved in the embodiment of the present invention can be replaced according to the actual needs of the project. As long as the drainage and force dissipation effects of the structure can be achieved, they are within the protection scope of this new use model.

[0043] The above drawings and descriptions describe the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A flexible drainage structure suitable for soil slopes, Features: It includes a drainage ditch composed of a drainage ditch, a geobag, an impermeable geotextile, a lock and a fixing rope, and an energy dissipation pool composed of an energy dissipation pool ditch, an energy dissipation pile, a geobag, an impermeable geotextile, a lock and a fixing rope; The shape of the drainage groove is trapezoidal or rectangular; The trench of the stilling pool is dustpan-shaped, narrow at the end connecting to the drainage ditch and wide at the opening; The geobag is provided with X-shaped reinforcement strips in the diagonal direction on both sides and sewn with fixing rings, wherein the reinforcement strips are made of tensile synthetic fiber material, and the fixing rings are made of metal material or tensile synthetic fiber material; Multiple high-strength hollow belts should be set horizontally in the anti-seepage geotextile, and the intervals should not be too large; A plurality of openings are arranged in the middle of the hollow belt; The fixing rope is made of tensile synthetic fiber or metal material, and buckles for fixing the geotextile are installed at both ends and in the middle of the fixing rope; The anti-seepage geotextile for drainage ditch is placed in the drainage ditch groove, and multiple hollow belts need to be set in the transverse direction of the geotextile in advance. The hollow belt is used to pass the fixing rope. The openings on the hollow belt are set according to the size of the drainage ditch. The opening positions are on both sides of the bottom surface of the drainage ditch. The lock is connected to the fixing ring on the geobag to fix the anti-seepage geotextile; The anti-seepage geotextile for the energy dissipation pool is placed in a dustpan-shaped groove, and multiple hollow belts need to be set in the transverse direction of the geotextile in advance. The hollow belts are used to pass the fixing ropes. The opening positions on the hollow belts are set in a triangular shape according to the arrangement of the geobags. The lock is connected to the fixing ring on the geobag to fix the anti-seepage geotextile.

2. A flexible drainage structure suitable for soil slopes according to claim 1, Features: The energy dissipation piles used in the energy dissipation pool are composed of geobags combined to form a specific shape, and are connected in pairs by fixing rings to form a whole.

3. A construction method for a flexible drainage structure suitable for soil slopes according to claim 1 or 2, It is characterized in that The following steps are involved: ① Drainage ditch: First, according to the drainage ditch design plan, a trapezoidal trench is excavated on the soil slope. Geobags are placed in the trench according to the fixed holes reserved in the hollow belt of the geotextile, and the soil is backfilled in the gaps between the geobags. The anti-seepage geotextile should be threaded with a fixing rope and fixed with a lock buckle in the hollow belt in advance. Then, the anti-seepage geotextile is laid. The bottom of the trench is laid first, and the lock buckle is used to lock it with the fixing ring on the previously placed geobag. Then, the gap between the geotextile and the trench wall is backfilled. After that, pits for fixing the geotextile are excavated on both sides of the trench according to the fixed holes reserved in the hollow belt of the geotextile. Geobags are placed in the pits and the gaps are backfilled. Finally, the lock buckle on the fixing rope threaded in the geotextile is locked with the fixing ring on the geobag to complete the construction of the drainage ditch. ② Energy dissipation pool: First, dig a dustpan-shaped trench at the head of the drainage ditch, place geobags in the trench according to the fixed holes reserved in the hollow belt of the geotextile, and backfill the soil between the geobags. The anti-seepage geotextile should be threaded with a fixing rope and fixed with a lock in the hollow belt in advance, and then lay the anti-seepage geotextile, first lay the bottom of the trench, use the lock to lock it with the fixing ring on the previously placed geobag, and then backfill the gap between the geotextile and the trench wall, and arrange the geobags used to form the energy dissipation piles in a triangular arrangement and place them in the middle of the anti-seepage geotextile to reserve a lock. The corresponding position of the buckle is adjusted, and the fixing ring is locked with the lock on the geotextile. The energy dissipation piles are arranged in multiple rows and layers. According to the project size, the number close to the drainage ditch is the least, and the number close to the drainage outlet gradually increases. The triangular arrangement direction is opposite to the previous level. Then, pits for fixing the geotextile are excavated on both sides of the trench according to the fixed holes reserved in the hollow belt of the geotextile. Geobags are placed in the pits and the gaps are backfilled. Finally, the lock on the fixing rope passed through the geotextile is locked with the fixing ring on the geobag to complete the construction of the energy dissipation pool.

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