CN211200417U - TBS slope protection system - Google Patents

Abstract

The utility model provides a TBS bank protection system, soil property side slope bottom of slope is equipped with the escape canal, include from domatic organic matter layer of outwards laying, the iron wire stratum reticulare, nutrition mud layer and non-woven fabrics layer, still including even interval laying stock and the water-drain pipe on domatic, the stock is L type, the length that vertical portion inserted soil property side slope stock drilling is not less than 95% of stock horizontal part and vertical portion total length, in the stock drilling, the stock outside is filled there is the cement mortar protective layer, domatic going up, the top and the below on iron wire stratum reticulare are equipped with steel backing plate and concrete packing ring respectively, domatic every 1m sets up an organic matter layer thickness control stake.

Description

TBS slope protection system

Technical Field

The utility model belongs to ground and foundation engineering field specifically belong to a TBS bank protection system.

Background

In the construction process of the roadbed side slope at the present stage, roadbed soil quality, geological structures (cutting), hydrological conditions and the like are all important factors influencing the stability of the side slope, so that landslide and collapse can be caused by improper side slope protection treatment, and hidden dangers are caused to driving safety. At present, common schemes for slope protection construction treatment include methods such as frame lattice beam protection, dry-masonry rubble slope protection, mortar-masonry rubble slope protection and the like; the traditional scheme generally has the disadvantages of relatively high construction difficulty, relatively high cost, poor ornamental performance and long construction period.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a TBS slope protection system, which aims to solve the technical problem of great construction difficulty in the prior art; and solves the problem of long construction period in the prior art.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a TBS slope protection system is characterized by comprising an organic matter layer, an iron wire mesh layer, a nutrition mud layer and a non-woven fabric layer which are paved from the slope surface to the outside, and further comprising anchor rods and water drain pipes which are uniformly arranged on the slope surface at intervals, wherein the anchor rods are L type, the length of a vertical part inserted into a soil slope anchor rod drilling hole is not less than 95% of the total length of a transverse part and the vertical part of the anchor rod, cement mortar protective layers are filled in the anchor rod drilling hole and the outer side of the anchor rod, a steel base plate and a concrete washer for fixing the anchor rods are respectively arranged above and below the slope surface and the iron wire mesh layer, and an organic matter layer thickness control pile is arranged on the slope surface every 1 m.

Further preferably, the anchor rods are all made of HRB400 threaded steel, asphalt coatings are coated on the transverse portions of the anchor rods, vertical portions extending from the slope surface to the transverse portions and vertical portions extending inwards from the slope surface and being 50mm in diameter, and the anchor rods comprise fixed net structure anchor rods and long stress anchor rods, wherein the fixed net structure anchor rods are arranged at intervals, the fixed net structure anchor rods are 18mm in diameter, and the long stress anchor rods are 20mm in diameter.

Further, even interval is equipped with a plurality of groups to well support on the long atress stock body of rod, the body of rod that inserts the stock drilling, adjacent centering support interval 1200~2000mm, every group centering support includes four at least even interval welded fastening centering rods on body of rod outer wall, and centering rod is integrated into one piece's isosceles trapezoid pole or arc pole, isosceles trapezoid pole or arc pole both ends all are equipped with and are used for with body of rod welded fastening's reinforcing bar section.

Furthermore, the drain pipe comprises a soft drain pipe inserted into a drill hole of the drain pipe, a PVC drain pipe inserted into the soft drain pipe and non-woven geotextile wrapped on the outer wall of the PVC drain pipe, drain holes with the distance of 10-12 cm are uniformly distributed on the pipe wall of the PVC drain pipe at intervals, the length of the extending slope surface is not less than 75cm, and the drill hole between the PVC drain pipe and the soft drain pipe, which is 1000cm away from the slope surface, is plugged by cement paste.

Further, the PVC drain pipe downward sloping, and be 10 with the horizontal plane contained angle.

Further, the anchor rod inclines upwards, and the included angle between the anchor rod and the horizontal plane is 15 degrees.

Further, the water-cement ratio of the cement mortar protective layer is 0.45-0.5.

In addition, the iron wire mesh layer is a 14# galvanized iron wire mesh with the mesh specification of 5cm × 5cm, the lap joint length between meshes is 10cm, the lap joint part is connected and bound in a Z shape through a geotechnical rope, the distance between the iron wire mesh layer and the slope surface is 80-100 mm, and a closed anchor rod with the distance and the depth of 0.5m is additionally arranged on the iron wire mesh layer at the edge of the soil slope.

More preferably, the thickness of the organic substance layer is 80cm, the thickness of the nutrient mud layer is 20cm, and the height of the concrete gasket is the same as the thickness of the organic substance layer.

Compared with the prior art the utility model has the following characteristics and beneficial effect:

the utility model discloses a bank protection technique, to the bank protection construction of soil property side slope and other unfavorable geological conditions, the mode that adopts wash-out pipe, stock slip casting, hanging net, injection substrate combination is consolidated the soil property side slope, can effectively improve the overall stability of side slope, and the construction scheme construction degree of difficulty of relative tradition is less, the time limit for a project is shorter, and has good economic benefits and environmental benefits, more traditional scheme is more pleasing to the eye simultaneously, there are fine popularization and practical value, can produce good economic benefits after extensive popularization and application.

Drawings

Fig. 1 is a schematic structural view of the TBS slope protection system after completion of construction;

fig. 2 is a schematic view of the position relationship between the anchor rod and the water drain pipe and the slope according to the present invention;

FIG. 3 is a detailed structural view of the slope protection system according to the present invention;

fig. 4 is a schematic structural view of a fixed net structure anchor rod according to the present invention;

fig. 5 is a schematic structural view of a long stressed anchor rod according to the present invention;

fig. 6 is a schematic view of the position relationship between the long stressed anchor rod and the centering bracket according to the present invention;

fig. 7 is a schematic structural view of a wire mesh layer according to the present invention;

fig. 8 is a schematic structural view of a drain pipe according to the present invention.

Reference numerals: 1-slope surface; 2-organic layer; 3-a layer of wire mesh; 4-a nutrient mud layer; 5-a non-woven fabric layer; 6-drainage ditch; 7-anchor rod; 71-fixing the net to construct an anchor rod; 72-long stressed anchor rod; 8-a water drain pipe; 9-concrete gasket; 10-a steel backing plate; 11-a protective layer of cement mortar; 12-centering rod; 13-a soft drain pipe; 14-PVC drain pipe; 15-non-woven geotextile; 16-a drain hole; 17-cement slurry; 18-asphalt coating; 19-georope.

Detailed Description

In order to make the technical means, innovative features, objectives and functions realized by the present invention easy to understand, the present invention will be further described below.

The embodiments described herein are specific embodiments of the present invention, and are intended to be illustrative of the concepts of the present invention, which are intended to be illustrative and exemplary, and should not be construed as limiting the scope of the embodiments of the present invention. In addition to the embodiments described herein, those skilled in the art will be able to employ other technical solutions which are obvious based on the disclosure of the claims and the specification of the present application, and these technical solutions include technical solutions which make any obvious replacement or modification for the embodiments described herein.

The TBS slope protection system comprises an organic matter layer 2, a wire mesh layer 3, a nutrient mud layer 4 and a non-woven fabric layer 5 which are laid from a slope surface 1 to the outside, wherein the thickness of the organic matter layer 2 is 80cm, the thickness of the nutrient mud layer 4 is 20cm, the height of a concrete gasket 9 is equal to the thickness of the organic matter layer 2, the TBS slope protection system also comprises anchor rods 7 and drain pipes 8 which are uniformly distributed on the slope surface 1 at intervals, the intervals between the drain pipes 8 are 2m, the anchor rods 7 are L-type, the lengths of the vertical parts inserted into anchor rod holes of the soil slope are not less than 95% of the total length of the horizontal parts and the vertical parts of the anchor rods 7, cement mortar protective layers 11 are filled in the anchor rod holes and the outer sides of the anchor rods 7, the water cement mortar ratio of the cement mortar protective layers 11 is 0.45-0.5, steel base plates 10 and concrete gaskets 9 are respectively arranged above and below the wire mesh layer 3 on the slope surface 1, and slope surface control piles are arranged at intervals of 1 m.

The anchor rods 7 are all made of HRB400 threaded steel, the transverse part of the anchor rod 7, the vertical part from the slope surface to the transverse part and the vertical part of 50mm extending inwards from the slope surface are all coated with asphalt coatings 18, as shown in figures 4 and 5, the anchor rod 7 comprises fixed net structure anchor rods 71 with the diameter of 18mm and long stress anchor rods 72 with the diameter of 20mm which are arranged at intervals, the long stress anchor rods 72 and the fixed net structure anchor rods 7 are arranged in a staggered mode at intervals of 2.1m and 0.75m, the vertical intervals of 2.1m and the horizontal intervals of 0.75m, as shown in figure 6, a plurality of pairs of middle supports are evenly arranged on the rod body of the long stress anchor rods 72 and the rod body inserted into the anchor rod drilling hole at intervals, the intervals of 1200-2000 mm between adjacent centering supports are, each group of centering supports comprises at least four centering rods 12 which are evenly welded and fixed on the outer wall of the rod body, the centering rods 12 are integrally formed isosceles trapezoid rods or arc rods, both ends of the isosceles trapezoid rods are provided with reinforcing steel bars for welding, the grouting pipe of the long stress anchor rod 72 adopts a primary grouting pipe, the length of the primary grouting pipe is not smaller than the length of the anchor rod body, and the PVC fiber hose is pulled out during grouting.

As shown in fig. 8, the drain pipe 8 comprises a soft drain pipe 13 inserted into a drill hole of the drain pipe, a PVC drain pipe 14 inserted into the soft drain pipe 13, and a non-woven geotextile 15 wrapped on the outer wall of the PVC drain pipe 14, wherein drain holes 16 with an interval of 10-12 cm are uniformly distributed on the pipe wall of the PVC drain pipe 14 at intervals, the length of the drain hole extending out of the slope 1 is not less than 75cm, and the drill hole between the PVC drain pipe 14 and the soft drain pipe 13, which is 1000cm away from the slope, is plugged by cement paste 17.

The PVC drain pipe 14 inclines downwards, forms an included angle of 10 degrees with the horizontal plane, and the anchor rod 7 inclines upwards, and forms an included angle of 15 degrees with the horizontal plane.

As shown in fig. 7, the mesh specification of the iron wire net layer 3 is 5cm × 5 cm's 14# galvanized iron wire net, and the overlap joint length between the nets is 10cm, and the overlap joint passes through geotechnological rope 19 and connects the ligature according to the zigzag, and iron wire net layer 3 and domatic interval 80mm ~100mm adopt the concrete washer of different thickness to adjust, the utility model discloses preferably adopt iron wire net layer 3 and domatic interval 80mm, be located the soil property side slope edge on the iron wire net layer 3 add and establish the sealed stock that interval and degree of depth are 0.5 m.

A construction method of a TBS slope protection system is characterized by comprising the following steps:

step one, drilling: erecting a scaffold at a hole position on a side slope according to a drawing, laying a wood springboard on a full layer to serve as a working platform of an operator, after the rig platform is erected, placing a drilling machine at the hole position, correcting the inclination angle of a main shaft, so as to ensure the inclination of a drilled hole, moving the drilling machine, aligning the center of the main shaft with the hole position, fixing the drilling machine, and preventing the drilling machine from moving in the drilling process; after drilling, blowing out dust and impurities in the holes by using high-pressure air;

step two, constructing a water drainage hole: firstly, inserting a soft drain pipe 13 into a drill hole, then inserting a PVC drain pipe 14 into the soft drain pipe 13, plugging the PVC drain pipe 14 between the soft drain pipes 13 which are 1m away from an orifice by cement paste, arranging drain holes on the PVC drain pipe 14 in a quincunx shape, wherein the distance is 10cm, and fastening an end head and drain small holes on the pipe by non-woven geotextile;

step three, mounting the anchor rod 7: when the long stressed anchor rod 72 is placed, the long stressed anchor rod is prevented from being twisted and bent, a grout outlet of a grouting pipe is inserted into a position 300-500 mm away from the bottom of a hole, grout is continuously poured from bottom to top, the grouting pressure is 0.2-0.3Mpa, grouting can be stopped after grout overflows from the hole opening by one-time grouting, and grout is supplemented when the anchoring body cannot be filled with the hardened grout; grouting the hole bottom by using constructed anchor rod 71, wherein the mortar is M30 mortar, the grouting pressure is 0.2-0.3MPa, a grouting pipe is inserted into a position 5-10cm away from the hole bottom during grouting, and the grouting pipe is slowly and uniformly pulled out along with the injection of cement mortar until the grouting pipe is full; after grouting, mounting a concrete gasket 9; fully paving an iron wire net layer 3 on the slope surface 1, and installing a steel base plate 10 after net hanging is finished;

step four, laying a nutrient mud layer 4: arranging a thickness control pile every 1m on the slope surface 1, and then spraying an organic matter layer 2 on the slope surface 1, wherein the thickness is 8cm, and the organic matter layer 2 is formed by mixing local mixed soil, grass fiber or wood fiber, an adhesive, a slow-release fertilizer and a water-retaining agent; and then, spraying a nutrient mud layer 4 on the machine layer 2, wherein the thickness of the nutrient mud layer 4 is 2cm, the nutrient mud layer 4 is formed by mixing local soil, grass fiber or wood fiber, an adhesive, a compound fertilizer, a water-retaining agent and grass seeds, and the nutrient mud layer 4 is covered with non-woven fabrics to prevent rainwater washing, so that the construction of a side slope protection system of the soil slope is completed.

The utility model is suitable for a soil property side slope protection, its technical thought key lie in side slope soil body reinforcement and side slope surface protection, and its innovation point lies in being applied to soil property side slope reinforcement and domatic protection with stock slip casting, outlet and the effective combination of hanging net injection thick layer substrate.

(1) And (3) soil slope reinforcement: firstly, a long anchor rod is adopted to perform grouting and deeply reinforce the stratum; secondly, drainage holes are added to discharge underground water in the slope stratum, so that the slope stability is improved; thirdly, a structural anchor rod hanging net is added to spray a thick layer of organic base material to cover the excavation face, so that the slope surface is protected from being washed away by rainwater, and the stability of the slope is kept.

(2) Slope surface protection: the method combines the spraying of a thick organic substrate (organic substance layer) and the nutrient mud on the soil slope, and firstly, the slope surface of the slope is sealed to prevent the slope from being washed by rainwater; and the organic base material contains grass seeds, so that the grass seeds can rapidly root and germinate, restore green side slopes, stabilize the side slopes and prevent water and soil loss.

(3) The organic base material is composed of local mixed soil, grass fiber or wood fiber, adhesive, slow release fertilizer, water-retaining agent and the like. The nutrient mud is prepared from local soil, grass fiber or wood fiber, adhesive, compound fertilizer, water-retaining agent, grass seeds and the like. The specific proportion is determined according to field tests.

(4) Compared with the conventional anchor rod or anchor cable frame beam and anchor net concrete spraying slope protection, the slope protection device can reduce or even eliminate concrete, reduce the damage to the existing ecological environment, and has high slope greening speed and fast local ecological system restoration.

Second, implementation of the scheme

(I) construction process flow chart

1. Drilling (Anchor rod hole and drainage hole)

(1) And (4) erecting a scaffold at a hole position on the side slope according to the drawing, and paving a wood springboard on the full layer to serve as a working platform for operators.

(2) After the drilling machine platform is erected, the drilling machine is placed at a hole position, and the inclination angle of the main shaft is corrected, so that the inclination of a drilled hole is guaranteed. And then moving the drilling machine to align the center of the main shaft with the hole position, and fixing the drilling machine to prevent the drilling machine from moving in the drilling process.

(3) And blowing out dust and impurities in the holes by using high-pressure air after the drilling is finished.

2. Drainage hole construction

After drilling, a flexible drain pipe with the diameter of 100mm is inserted, a PVC drain pipe with the diameter of 75mm is inserted in the flexible drain pipe, quincunx-shaped drain holes are formed in the PVC drain pipe, the distance is 10cm, the end head and the small drain holes in the pipe are fastened by non-woven geotextile, the PVC drain pipe extends out of the slope surface by no less than 75mm, and the hole opening is plugged by cement paste with the diameter of 1 m.

3. Anchor rod construction

(1) The long-stressed anchor rod is made of HRB400 deformed steel bar, and before manufacturing, the deformed steel bar is straightened, degreased and derusted. When the anchor rod is manufactured, a centering bracket is arranged every 1.5m along the axial direction of the rod body, the centering bracket is firmly welded with the rod body of the anchor rod, and a grouting pipe is firmly bound with the anchor rod; the anchor rod is constructed by phi 18 (HRB 400) steel bars.

(2) When long stressed anchor rods are placed, twisting and bending should be prevented. The rod body and the grouting pipe are placed into the drill hole together, the angle of the rod body placed into the hole is consistent with the angle of the drill hole, the thickness of the protective layer of the rod body is not less than 2cm, and meanwhile, the depth of the rod body inserted into the hole is not less than 95% of the length of the anchor rod. The length of the rod body of the structural anchor rod inserted into the hole is not shorter than 95% of the designed length.

(3) The long-stress anchor rod grouting adopts cement paste, the water cement ratio is 0.45-0.5, and additives can be added if necessary. During grouting, a grout outlet of a grouting pipe is inserted into a position 300-500 mm away from the bottom of a hole, grout is continuously poured from bottom to top, and the grouting pressure is 0.2-0.3 MPa. Grouting can be stopped after the orifice overflows by primary grouting, and grout is supplemented when the anchoring body cannot be filled with the hardened grout.

Grouting the anchor rod by adopting hole bottom grouting, wherein the mortar adopts M30 mortar, and the grouting pressure is 0.2-0.3 MPa. During grouting, the grouting pipe is inserted into a position 5-10cm away from the bottom of the hole and is slowly and uniformly pulled out along with the injection of cement mortar until the hole is full.

4. C30 concrete washers were installed.

5. 14# galvanized wire netting is laid on the slope, the mesh specification is 5cm × 5 cm. galvanized wire netting and is tensioned when laid, the lap joint width between the nets is 10cm, concrete gaskets with different thicknesses are adopted for adjustment, the distance between the wire netting and the slope is kept at 80mm, and the lap joint position is connected, bound and fixed in a Z shape by a georope.

6. After the net is hung, a backing plate is installed, and the size of the backing plate is 90 × 90, 90 × 9 mm.

7. And arranging a thickness control pile on the slope surface every 1m before spraying the planting substrate, wherein the spraying thickness is 8 cm. Then the nutrient mud is directly sprayed on the surface of the planting substrate, and the spraying thickness is 2 cm.

8. In order to prevent rain wash, prevent too fast water evaporation and preserve heat to facilitate seed germination, non-woven fabrics (30g/m2) are adopted for covering to prevent rain wash.

9. Watering every day to keep the soil moist after spraying if it is not raining, and watering and maintaining twice a day (once in the morning and evening).

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims (8)

1. The TBS slope protection system is characterized by comprising an organic layer (2), an iron wire mesh layer (3), a nutrition mud layer (4) and a non-woven fabric layer (5) which are laid outwards from a slope surface (1), anchor rods (7) and drain pipes (8) which are laid on the slope surface (1) at uniform intervals, wherein the anchor rods (7) are L-shaped, the length of a vertical part inserted into a soil slope anchor rod hole is not less than 95% of the total length of the transverse part and the vertical part of the anchor rod (7), cement mortar protective layers (11) are filled in the anchor rod hole and the outer side of the anchor rod (7), steel backing plates (10) and concrete gaskets (9) used for fixing the anchor rods (7) are arranged above and below the iron wire mesh layer (3) on the slope surface (1) respectively, an organic layer (2) thickness control pile is arranged on the anchor rod (1) at intervals of 1m, the anchor rod (7) is made of HRB400 threaded steel, the transverse part of the anchor rod (7), the anchor rod extends inwards from the slope surface to the transverse part, the anchor rod layer and the thickness control pile is arranged at intervals of the slope surface (7) and the vertical layer (18 mm) is coated with asphalt coating (18 mm), and the diameter of the slope surface (18 mm) is equal length of the asphalt coated with the asphalt coating (.

2. The TBS slope protection system of claim 1, wherein: even interval is equipped with a plurality of groups to well support on long atress stock (72) the body of rod, on inserting the body of rod of stock drilling, adjacent centering support interval 1200~2000mm, every group centering support includes centering rod (12) of four at least even interval welded fastening on body of rod outer wall, centering rod (12) isosceles trapezoid pole or arc pole as integrated into one piece, isosceles trapezoid pole or arc pole both ends all are equipped with and are used for with body of rod welded fastening's reinforcing bar section.

3. The TBS slope protection system of claim 1, wherein: the drainage pipe (8) comprises a soft drainage pipe (13) inserted into a drainage pipe drill hole, a PVC drainage pipe (14) inserted into the soft drainage pipe (13) and non-woven geotextile (15) wrapped on the outer wall of the PVC drainage pipe (14), drainage holes (16) with the interval of 10-12 cm are uniformly distributed on the pipe wall of the PVC drainage pipe (14) at intervals, the length extending out of a slope surface (1) is not less than 75cm, and the drilling hole between the PVC drainage pipe (14) and the soft drainage pipe (13) with the distance of 1000cm from the slope surface is plugged by cement paste (17).

4. The TBS slope protection system of claim 3, wherein: the PVC drain pipe (14) inclines downwards and forms an included angle of 10 degrees with the horizontal plane.

5. The TBS slope protection system of claim 1, wherein: the anchor rod (7) is inclined upwards and forms an included angle of 15 degrees with the horizontal plane.

6. The TBS slope protection system of claim 4, wherein: the water-cement ratio of the cement mortar protective layer (11) is 0.45-0.5.

7. The TBS slope protection system according to claim 1, wherein the iron wire mesh layer (3) is made of 14# galvanized iron wire mesh with mesh size of 5cm × 5cm, the overlapping length between meshes is 10cm, the overlapping part is connected and bound according to a Z shape through a georope (19), the distance between the iron wire mesh layer (3) and the slope surface is 80 mm-100 mm, and the iron wire mesh layer (3) at the edge of the soil slope is additionally provided with sealing anchor rods with the distance and the depth of 0.5 m.

8. The TBS slope protection system of any one of claims 1-7, wherein: the thickness of the organic matter layer (2) is 80cm, the thickness of the nutrient mud layer (4) is 20cm, and the height of the concrete gasket (9) is the same as the thickness of the organic matter layer (2).

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