Slope protection structure with good drainage effect

Abstract

The utility model discloses a slope protection structure with a good drainage effect. Existing side slope underground water drainage effects are not ideal and accumulated all the year round, and side slope collapse and other accidents may occur. Slopes are arranged in a grading mode, a slope platform is arranged between every two grades, intercepting ditches are formed in the slope platforms, and gutters are arranged at the positions 2 m away from a slope top excavation line; an anchor rod frame is arranged on the slope surface and comprises a frame body, an upward-inclined drainage hole is formed in the center position in the frame body, and the frame body is fixed through an anchor rod; the inclined drain hole comprises a drill hole, and the elevation angle of the drill hole is 5-10 degrees; pVC plastic floral tubes are arranged in the drill holes, and holes are formed in the 2 / 3 range of the upper middle portions of the PVC plastic floral tubes. The PVC plastic floral tube is filled with medium-coarse sand; the outer part of the PVC plastic floral tube is wrapped with water-permeable geotextile; supporting sewers are arranged on the side slope at intervals. The drainage structure is good in drainage effect, and the stability of the slope structure is ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of slope protection, and particularly relates to a slope protection structure with good drainage effect. BACKGROUND

[0002] The south region of China is rich in water resources, and the rainfall is large, and the groundwater depth is shallow, when the stratum simultaneously exists the bedding and other adverse geological conditions, the slope stability is poor, and there is a potential safety hazard when excavating the slope, and then a serious safety accident is caused to the traffic along the line. The existing slope protection structure realizes seepage drainage by setting a water intercepting ditch and a drainage ditch; but the underground water discharge effect is not ideal, and the slope may collapse and other accidents after years of accumulation. Therefore, it is urgent to provide a slope protection structure with good drainage effect. CONTENT OF UTILITY MODEL

[0003] In order to make up for the shortage of prior art, the utility model provides a slope protection structure with good drainage effect, which has good drainage effect and ensures the stability of the slope structure.

[0004] In order to achieve the above purpose, the technical scheme adopted by the utility model is:

[0005] A slope protection structure with good drainage effect, characterized by: the slope is arranged in stages, a slope platform is arranged between each stage, a water intercepting ditch is arranged on the slope platform, and a gutter is arranged 2m outside the slope top excavation line;

[0006] An anchor rod frame is arranged on the slope surface, the anchor rod frame comprises a frame, an upwardly inclined water discharge hole is arranged at the central position in the frame, and the frame is fixed through an anchor rod;

[0007] The upwardly inclined water discharge hole comprises a drill hole, and the drill hole has an upward angle of 5-10 degrees;

[0008] A PVC plastic flower pipe is arranged in the drill hole, and the PVC plastic flower pipe is perforated in the upper 2 / 3 range; the PVC plastic flower pipe is filled with medium-coarse sand inside; and the PVC plastic flower pipe is wrapped with water-permeable geotextile outside;

[0009] Supporting seepage ditches are arranged on the slope at intervals.

[0010] Further, one supporting seepage ditch is arranged on the slope every 10-20m, and the width is 2m.

[0011] Further, the cross section of the supporting seepage ditch adopts a rectangular shape.

[0012] Further, a seepage ditch bottom plate is arranged at the bottom of the supporting seepage ditch, and a filter layer is arranged on both sides of the upper part of the seepage ditch bottom plate; the outer side of the filter layer is a 0.3m-thick sand and pebble filter layer, a layer of water-permeable geotextile is laid on the inner side of the filter layer; a dry-cast flagstone drainage layer is arranged on the inner side of the water-permeable geotextile; and a seepage ditch top plate is arranged at the top.

[0013] Further, the top plate of the seepage ditch is provided with a drainage groove.

[0014] Further, the hole pipe is arranged at the hole opening in the range of 500-1000mm, the hole pipe is connected with the PVC plastic flower pipe, and the hole pipe extends out of the slope surface by 100mm.

[0015] Further, the frame is protected by grass and shrubs.

[0016] The beneficial effects of the utility model are as follows:

[0017] 1) The side slope protection structure of the utility model is reinforced to the adverse geology such as bedding by the anchor rod frame beam, the inclined drainage hole is arranged at the central position in each frame, the support seepage ditch is arranged at every certain distance along the slope surface, the underground water is drained through the inclined drainage hole and the support seepage ditch; the gutter is arranged at the top of the ditch, the water intercepting ditch is arranged at the platform, the surface water is drained through the gutter and the water intercepting ditch of the platform, the comprehensive drainage effect is good, and the utility model can be well applied to the water-rich area in the south;

[0018] 2) The anchor rod is inserted and driven at each frame node to anchor the rock stratum, and the side slope stability is high. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the front view schematic diagram of the side slope protection structure of the utility model;

[0020] Figure 2 It is the transverse section view of the side slope protection structure of the utility model;

[0021] Figure 3 It is the transverse section view of the inclined drainage hole of the utility model;

[0022] Figure 4 It is the transverse section view of the support seepage ditch of the utility model;

[0023] In the drawing, 1. anchor rod, 2. inclined drainage hole, 3. support seepage ditch, 4. frame, 5. water intercepting ditch, 6. gutter, 2-1. PVC plastic flower pipe, 2-2. drilling, 3-1. seepage ditch top plate, 3-2. dry masonry stone drainage layer, 3-3. sand and pebble filter layer, 3-4. seepage ditch bottom plate. DETAILED DESCRIPTION

[0024] The utility model will be explained in detail in combination with specific implementation manners.

[0025] This utility model's slope protection structure reinforces adverse geological conditions such as bedding planes using anchored frame beams. Each frame has a centrally located inclined drainage hole, and a supporting seepage trench is installed at regular intervals along the slope to drain groundwater. A gutter is installed at the top of the trench, and an intercepting ditch is installed on the platform to drain surface water. The specific structure is as follows:

[0026] like Figure 1 , 2 As shown, the slope of this utility model adopts a graded setting, with a slope platform set between each grade. A drainage ditch 5 is set on the slope platform, and a ditch 6 is set 2m outside the excavation line at the top of the slope. In this embodiment, the slope ratio of the excavated slope is 1:1.25, the slope grade height is 8m, the slope platform is 2-4-2m, the slope drainage ditch 5 has a cross-sectional dimension of 0.6×0.6m, and the ditch 6 is a trapezoidal ditch of 0.6×0.6m, which drains surface water into the natural ditch.

[0027] An anchor frame is installed on the slope, comprising a frame 4, which is protected with shrubs. A sloping drainage hole 2 is located at the center of the frame 4. The nodes of the frame 4 are fixed by anchor bolts 1. In this embodiment, the node spacing of the anchor frame is 3.0m, the length of the anchor bolt 1 is 8.0m to 12m, and the angle between the anchor bolt 1 and the horizontal plane is 15°. Before anchor bolt construction, pull-out tests should be conducted in the same stratum as the anchoring section, but not at the project site. At least three test holes should be drilled to verify the ultimate bond strength f between the anchor hole wall and the anchor body. rbk The construction process and parameters were determined, and the recommended length of the test anchor was 3.0m. rbk Values: Not less than 0.05 MPa for soil layers, not less than 0.15 MPa for completely weathered rock layers, not less than 0.3 MPa for strongly weathered rock layers, and not less than 0.6 MPa for weakly weathered rock layers. After the anchor bolts are installed, pull-out force tests are conducted on 3% of the total number of working anchor bolts, with a minimum of 3 bolts tested. Pull-out force requirements are: not less than 30 kN for soil layers, not less than 90 kN for completely weathered rock layers, not less than 190 kN for strongly weathered rock layers, and not less than 250 kN for weakly weathered rock layers.

[0028] like Figure 3As shown, the upwardly inclined drain hole 2 includes a borehole 2-2 with an upward angle of 5°-10°; in this embodiment, the diameter of the borehole 2-1 is φ91mm; a φ80mm PVC plastic flower pipe 2-1 is arranged in the borehole 2-2, the PVC plastic flower pipe 2-1 is perforated in the upper 2 / 3 range to facilitate the infiltration of underground water into the pipe body, and the lower 1 / 3 range is kept intact to provide a good water passage; the PVC plastic flower pipe 2-1 is filled with medium-coarse sand inside to improve the water passing efficiency; the PVC plastic flower pipe 2-1 is wrapped with a water-permeable geotextile outside to prevent mud and sand from entering the pipe, and the depth of the borehole is about 0.2m deeper than the PVC plastic flower pipe. In order to avoid the gradual erosion of the slope surface near the orifice by the underground water flowing out of the orifice, and to increase the appearance beauty of the slope and facilitate the construction of the slope protection, an orifice pipe is arranged in the range of 500-1000mm from the orifice of the borehole 2-2, the orifice pipe is connected with the PVC plastic flower pipe 2-1, and the orifice pipe extends out of the slope surface by 100mm. Generally, a white UPVC plastic pipe with a slightly larger diameter than the water-permeable pipe is used, and the fixing of the orifice pipe usually adopts cement mortar to fill the gap between the orifice pipe and the borehole wall.

[0029] A support seepage ditch 3 is arranged every 10-20m on the slope, with a width of 2m. The cross section of the support seepage ditch 3 is rectangular. The water outlet of the support seepage ditch 3 should be closely connected with the longitudinal drainage facilities to ensure the smooth drainage. The support seepage ditch 3 is used for dewatering the soil body of the slope with a high water content, and also plays a role in supporting the slope, and is suitable for the soil slope with a loose surface soil and a slope rate not steeper than 1:1.25. The setting position of the support seepage ditch should be comprehensively considered in combination with the height of the excavated slope, the lithology of the stratum, the degree of weathering and crushing, and the development of underground water, especially the position of the concentrated water flow.

[0030] As shown in Figure 4 , a seepage ditch bottom plate 3-4 is arranged at the bottom of the support seepage ditch 3, and a filter layer is arranged on both sides of the upper part of the seepage ditch bottom plate 3-4; the outer side of the filter layer is a 0.3m-thick sand and pebble filter layer 3-3, and a layer of water-permeable geotextile 600g / m 2 is laid on the inner side of the filter layer; a dry masonry stone drainage layer 3-2 is arranged on the inner side of the water-permeable geotextile; and a seepage ditch top plate 3-1 is arranged at the top. The seepage ditch top plate 3-1 and the seepage ditch bottom plate 3-4 are both made of cast concrete to prevent surface water from flowing into the ditch. The seepage ditch top plate 3-1 is provided with a drainage groove.

[0031] Specifically, the construction sequence of the anchor rod frame is: determining the hole position → positioning the drilling machine → adjusting the angle → drilling → hole cleaning → installing the anchor rod → grouting → grooving (for non-hard rock sections) → binding the reinforcement → erecting the formwork → pouring the concrete → greening protection in the frame beam.

[0032] The construction sequence of the support seepage ditch is: construction preparation → measurement and setting out → trench excavation and acceptance → bottom layer construction → synchronous construction of the filter layer and the drainage layer → sealing layer construction.

[0033] The construction sequence of the upwardly inclined water outlet hole is: line positioning, erecting scaffold, drilling machine positioning, drilling, drainage pipe installation and fixing pipe mouth.

[0034] In the description of the utility model, unless another definite provision and limitation, the term "arrange", "install", "connect", "connect", "fix" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be two elements inside the communication or two elements of the interaction relationship.For the ordinary skilled person in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0035] The content of the utility model is not limited to the examples listed in the embodiment, any equivalent transformation of the utility model technical scheme adopted by the ordinary skilled person in the art by reading the utility model specification is covered by the claims of the utility model.

Claims

1. A side slope protection structure having a good drainage effect, characterized by: The slope is graded, and a slope platform is arranged between each grade, and a water intercepting ditch (5) is arranged on the slope platform, and a gutter (6) is arranged 2 m outside the slope excavation line; An anchor rod frame is arranged on the slope surface, and the anchor rod frame comprises a frame (4), and a central position in the frame (4) is provided with an upward inclined drain hole (2), and the frame (4) is fixed by an anchor rod (1); The upward inclined drain hole (2) comprises a drill hole (2-2), and an angle of the drill hole (2-2) is 5°-10°; A PVC plastic flower pipe (2-1) is arranged in the drill hole (2-2), and the PVC plastic flower pipe (2-1) is perforated in the upper 2 / 3 range; The PVC plastic flower pipe (2-1) is filled with medium-coarse sand inside, and the PVC plastic flower pipe (2-1) is wrapped with water-permeable geotextile outside. Support seepage ditches (3) are arranged on the slope at intervals.

2. The slope protection structure with good drainage effect according to claim 1, characterized in that: Every 10-20 m on the slope is provided with a support seepage ditch (3), and the width is 2 m.

3. The slope protection structure with good drainage effect according to claim 2, characterized in that: The support seepage ditch (3) adopts a rectangular section.

4. The slope protection structure with good drainage effect according to claim 3, characterized in that: A seepage ditch bottom plate (3-4) is arranged at the bottom of the support seepage ditch (3), and a filter layer is arranged on the upper two sides of the seepage ditch bottom plate (3-4); the outer side of the filter layer is a 0.3 m thick sand and pebble filter layer (3-3), a layer of water-permeable geotextile is laid on the inner side of the filter layer; a dry stone drainage layer (3-2) is arranged on the inner side of the water-permeable geotextile; and a seepage ditch top plate (3-1) is arranged at the top.

5. The slope protection structure with good drainage effect according to claim 4, characterized in that: A drainage groove is arranged on the seepage ditch top plate (3-1).

6. The slope protection structure with good drainage effect according to claim 5, characterized in that: An orifice pipe is arranged in the range of 500-1000 mm of the orifice of the drill hole (2-2), the orifice pipe is connected with the PVC plastic flower pipe (2-1), and the orifice pipe extends out of the slope surface by 100 mm.

7. The slope protection structure with good drainage effect according to claim 6, characterized in that: Grass and shrubs are arranged in the frame (4).

Images