CN110258591A - The ruggedized construction and reinforced construction method of loess slope - Google Patents

Abstract

The present invention relates to a kind of ruggedized construction of loess slope and reinforced construction method, ruggedized construction includes geotechnical fabric bag concrete skeleton and spiral positioning stake.Geotechnical fabric bag concrete skeleton is used to be layed in the slope surface of loess slope.Spiral positioning stake is used to be embedded in the inside of loess slope, and spiral positioning stake is connected with geotechnical fabric bag concrete skeleton.The ruggedized construction of above-mentioned loess slope, spiral positioning stake are not necessarily to well cementing compared with anchor pole, thread directly into loess slope under the effect of torque electric motor, and construction process quality easily guarantees, and direct load-bearing after the completion of construction；Geomembrane bag coagulation skeleton is compared with mortar rubble masonry pavement mode, and good integrity, durability is good, and landform is adaptable, and speed of application is fast, saving of work and time.In addition, spiral positioning stake is combined with geotechnical fabric bag concrete skeleton, the stronger stability of loess slope can guarantee.As it can be seen that can guarantee that loess slope is reinforced and tells in a short time, saving of work and time reduces cost.

Description

Reinforcing Structure and Reinforcing Construction Method of Loess Slope

technical field

The invention relates to the technical field of reinforcement of loess slopes, in particular to a reinforcement structure and a reinforcement construction method of loess slopes.

Background technique

With the development of the west, a large number of projects need to be carried out in the loess area, and it is inevitable to encounter the problem of reinforcement and treatment of the loess slope. The stability of the loess slope is mainly affected by the strength of the loess, therefore, the change of the strength of the loess directly affects the stability of the slope. However, loess is particularly sensitive to water. On the one hand, as the water content in the soil increases, its shear strength decreases; It sinks under its own weight and additional stress. Among them, the main deformation of the slope surface caused by the influence of water on the loess is manifested in three types: slope spalling, slope erosion, and slope collapse. Window hole type retaining wall skeleton slope protection; gravity retaining wall is added at the foot of the slope; for slopes with stability problems, anchor frame beams are used for reinforcement. For anchor rod frame beams, drilling and grouting is required for anchor rod construction, and the use of frame beams on slopes requires formwork pouring of concrete. The construction process is complicated and the construction period is long.

Contents of the invention

Based on this, it is necessary to overcome the defects of the prior art and provide a reinforcement structure and reinforcement construction method for loess slopes, which can ensure that loess slopes are reinforced in a short period of time and produce results, saving labor and time, and reducing costs .

Its technical scheme is as follows: a reinforcement structure for loess slopes, comprising: a geotechnical bag concrete skeleton, the geotechnical bag concrete skeleton is used to lay on the slope surface of the loess slope; and a spiral positioning pile, the spiral positioning pile The piles are used to be buried inside the loess slope, and the spiral positioning piles are connected with the concrete framework of the geotechnical bag.

For the reinforcement structure of the loess slope mentioned above, compared with the anchor rod, the screw positioning pile does not need drilling and grouting, and is directly screwed into the loess slope under the action of the torque electric motor. The construction process and construction quality are easy to guarantee, and the construction personnel require less , and it is directly loaded after the construction is completed; compared with the slope protection method of mortar rubble, the geomembrane bag concrete skeleton has good integrity, good durability, strong terrain adaptability, fast construction speed, and labor-saving and time-saving. In addition, the combination of spiral positioning piles and geomembrane concrete skeleton can ensure the strong stability of loess slope. In addition, the loess slope can also be treated with ecological greening to prevent soil erosion on the slope. It can be seen that the above-mentioned reinforcement structure of the loess slope can ensure that the loess slope is reinforced in a short period of time and produce results, saving labor and time, and reducing costs.

In one of the embodiments, the reinforcement structure of the loess slope further includes an auxiliary positioning plate, the auxiliary positioning plate is laid on the concrete skeleton of the geotechnical formwork bag, and the ends of the spiral positioning piles pass through the geotechnical The molded concrete skeleton is connected with the auxiliary positioning plate afterward.

In one of the embodiments, the spiral positioning pile is a spiral steel pile, and the auxiliary positioning plate is a steel plate; there are more than two spiral positioning piles, more than two auxiliary positioning plates, and the auxiliary positioning plate Correspondingly set up with the said spiral positioning piles one by one.

In one of the embodiments, the spiral positioning piles and the auxiliary positioning plate are provided with two rows, wherein one row of the spiral positioning piles and the other row of the spiral positioning piles are mutually staggered; the spiral positioning piles The pile heads are arranged at the nodes of the concrete skeleton of the geotechnical bag.

In one of the embodiments, one row of the spiral positioning piles is arranged at a position between 2/5 of the slope height and 1/2 of the slope height of the loess slope, and the other row of the spiral positioning piles is arranged 1/4 to 2/5 of the slope height of the loess slope.

In one of the embodiments, the auxiliary positioning plate is connected with a casing suitable for the pile head of the spiral positioning pile, and the sleeve is socketed and connected with the pile head of the spiral positioning pile; the auxiliary positioning The plate and the pile head of the spiral positioning pile are filled with concrete slurry.

In one of the embodiments, the angle between the spiral positioning pile and the slope surface of the loess slope is 60 to 120 degrees; the spiral positioning pile extends into the potential sliding surface of the loess slope the soil area within.

In one of the embodiments, the spiral positioning pile is a spliced pile body; the spiral positioning pile includes more than two positioning shafts, spiral blades, sleeves and connectors; more than two positioning shafts are connected in sequence, and Adjacent to the positioning shaft is connected through the sleeve, the sleeve is fixedly connected to the positioning shaft through a connecting piece, and the spiral blade is wound around the outer wall of the positioning shaft.

In one of the embodiments, the concrete skeleton of the geotechnical bag includes a geotechnical bag and concrete slurry filled in the geotechnical bag; The vertical and horizontal directions of the geotechnical bag are provided with nylon ropes of 7cm to 10cm at intervals of 25cm to 30cm, and the nylon ropes are used to connect the upper and lower layers of fabric together; the concrete skeleton of the geotechnical bag is made of Grass protection.

A reinforcement construction method for a loess slope, comprising the steps of:

Screw the spiral positioning pile into the slope surface fixed on the loess slope;

The geotechnical bag concrete skeleton is manufactured on the slope surface of the loess slope, and the spiral positioning pile is connected with the geotechnical bag concrete skeleton.

The above-mentioned reinforcement construction method of the loess slope has the same beneficial effect as the reinforcement structure of the loess slope, and will not be repeated here.

Description of drawings

Fig. 1 is one of the perspective structural diagrams of the reinforcement structure of the loess slope according to an embodiment of the present invention on the loess slope;

Fig. 2 is another perspective structure diagram of the reinforcement structure of the loess slope described in an embodiment of the present invention on the loess slope;

Fig. 3 is the structural schematic diagram of the spiral positioning pile in the reinforcement structure of the loess slope described in an embodiment of the present invention;

Fig. 4 is a structural schematic diagram of the geomembrane bag concrete skeleton in the reinforcement structure of the loess slope according to an embodiment of the present invention.

Reference signs:

10. Concrete skeleton of geotechnical mold bag, 11. Concrete beam, 12. Concrete longitudinal beam, 20. Spiral positioning pile, 21. Positioning shaft, 22. Spiral blade, 23. Sleeve, 24. Connector, 30. Loess slope , 31, potential sliding surface, 40, auxiliary positioning board.

Detailed ways

In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

In the description of the present invention, it should be understood that the terms "first" and "second" are used for description purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In the description of the present invention, it should be understood that when an element is considered to be "connected" to another element, it can be directly connected to the other element or intervening elements may be present at the same time. In contrast, when an element is referred to as being "directly" connected to another element, there are no intervening elements present.

In one embodiment, please refer to FIG. 1 and FIG. 2 , a reinforcement structure for a loess slope, which includes a geotechnical bag concrete skeleton 10 and screw positioning piles 20 . The geotechnical bag concrete skeleton 10 is used for laying on the slope surface of the loess slope 30 . The spiral positioning pile 20 is used for embedding inside the loess slope 30 , and the spiral positioning pile 20 is connected with the concrete framework 10 of the geotechnical mold bag.

For the reinforcement structure of the loess slope mentioned above, compared with the anchor rod, the screw positioning pile 20 does not need to be drilled and grouted, and is directly screwed into the loess slope 30 under the action of the torque electric motor. The construction process and construction quality are easy to guarantee, and the construction personnel There are few requirements, and the load is directly applied after the construction is completed; compared with the slope protection method of mortar rubble, the geomembrane bag concrete skeleton has good integrity, good durability, strong terrain adaptability, fast construction speed, and labor-saving and time-saving. In addition, the combination of the spiral positioning pile 20 and the geotechnical bag concrete skeleton 10 can ensure the strong stability of the loess slope 30 . In addition, the loess slope 30 can also be treated with ecological greening to prevent soil erosion on the slope. It can be seen that the above-mentioned reinforcement structure of the loess slope can ensure that the loess slope 30 is reinforced in a short period of time and produce effects, saving labor and time, and reducing costs.

Further, the reinforcement structure of the loess slope further includes an auxiliary positioning plate 40 . The auxiliary positioning plate 40 is laid on the concrete framework 10 of the geotechnical mold bag. The end of the spiral positioning pile 20 passes through the concrete framework of the geotechnical bag 10 and is connected with the auxiliary positioning plate 40 . In this way, under the pressure of the auxiliary positioning plate 40 , the geotechnical bag concrete skeleton 10 is firmly laid on the slope surface of the loess slope 30 , which can ensure the strong stability of the loess slope 30 .

Specifically, please refer to FIG. 1 and FIG. 4 , the concrete framework 10 of the geotechnical bag includes several concrete beams 11 and several concrete longitudinal beams 12 . Concrete beams 11 and concrete longitudinal beams 12 are arranged alternately to form a grid-like skeleton structure.

In one embodiment, please refer to FIG. 1 and FIG. 2 again, the spiral positioning pile 20 is a spiral steel pile, and the auxiliary positioning plate 40 is a steel plate. There are more than two spiral positioning piles 20, and more than two auxiliary positioning plates 40, and the auxiliary positioning plates 40 and the spiral positioning piles 20 are set correspondingly one by one.

In one embodiment, please refer to Fig. 1 and Fig. 2 again, the said spiral positioning pile 20 and the said auxiliary positioning plate 40 are provided with two rows, wherein one row of said spiral positioning pile 20 and the other row of said spiral positioning pile The positioning piles 20 are arranged staggered from each other. The pile heads of the spiral positioning piles 20 are arranged at the joints of the concrete framework 10 of the geotechnical mold bag. In this way, the fixing effect of the spiral positioning piles 20 can be reasonably exerted, and a strong stabilizing effect of the loess slope 30 can be realized. In addition, the distance between adjacent spiral positioning piles 20 is 1m-2m in the horizontal direction, and 1m-1.5m in the vertical direction, so that the arrangement of the spiral positioning piles on the slope is compatible with the concrete skeleton 10 of the geotechnical mold bag.

Further, one row of the spiral positioning piles 20 is arranged at a position between 2/5 of the slope height to 1/2 of the slope height of the loess slope 30, and the other row of the spiral positioning piles 20 is arranged at The loess slope 30 is between 1/4 and 2/5 of the slope height. Specifically, another row of the spiral positioning piles 20 is arranged at a position of 1/3 of the slope height of the loess slope 30 . In this way, the toe of the loess slope 30 can be better fixed, and the ability of the soil at the toe to resist shear deformation can be increased.

In one embodiment, the auxiliary positioning plate 40 is connected with a sleeve suitable for the pile head of the spiral positioning pile 20 , and the sleeve is socketed and connected with the pile head of the spiral positioning pile 20 . Concrete slurry is potted outside the auxiliary positioning plate 40 and the pile head of the spiral positioning pile 20 . In addition, the casing and the pile head of the screw positioning pile 20 are fixedly connected by high-strength bolts. In this way, the firmness of the combination between the screw positioning pile 20 and the auxiliary positioning plate 40 can be ensured. In addition, specifically, the auxiliary positioning plate 40 is a square plate, and the side length of the auxiliary positioning plate 40 is 30 cm to 40 cm.

In one embodiment, please refer to FIG. 1 and FIG. 2 again, the included angle between the spiral positioning pile 20 and the slope surface of the loess slope 30 is 60° to 120°. Specifically, the angle between the spiral positioning pile 20 and the slope surface of the loess slope 30 is 90 degrees. In this way, the screw positioning pile 20 can provide stronger anchoring force. The spiral positioning pile 20 extends into the soil layer area within the potential sliding surface 31 of the loess slope 30 . In this way, when the loess slope 30 deforms, the spiral positioning piles 20 located in the potential sliding surface 31 can provide anchoring force to restrain the deformation of the slope.

In one embodiment, please refer to FIG. 1 to FIG. 3 again, the spiral positioning pile 20 is a spliced pile body. Specifically, the screw positioning pile 20 includes more than two positioning shafts 21 , a screw blade 22 , a sleeve 23 and a connecting piece 24 . More than two positioning shafts 21 are connected in sequence, and the adjacent positioning shafts 21 are connected through the sleeve 23, and the sleeve 23 is fixedly connected with the positioning shaft 21 through the connecting piece 24. The helical blade 22 is wound around the outer wall of the positioning shaft 21 . Specifically, the helical blades 22 of the spiral positioning pile 20 are all embedded in the lower portion of the potential sliding surface 31 , so that the spiral positioning pile 20 located in the potential sliding surface 31 can provide anchoring force to restrain the deformation of the slope.

In one embodiment, the diameter of the positioning shaft 21 is specifically 38 mm to 89 mm; the positioning shaft 21 is a circular positioning shaft 21 or a square positioning shaft 21. When a circular positioning shaft 21 is used, it is mostly a seamless steel pipe. The wall thickness is 0.1 times of its diameter; when the square positioning shaft 21 is adopted, it is mostly a solid steel rod.

The diameter of the spiral blade 22 is 120mm-270mm, the thickness is 6mm-12mm, the rotation angle is 360°, and the pitch is 36mm-80mm; the spiral blade 22 and the positioning shaft 21 are connected by welding.

The sleeve 23 is specifically steel, which is consistent with the material of the positioning shaft 21 and the screw blade 22. The sleeve 23 is provided with 1 to 3 reserved bolt holes, and the diameter of the reserved bolt holes is 16mm to 22mm; the connecting piece 24 is specifically a high-strength bolt , The strength grade of high-strength bolts is not less than 8.8, the material is 45# steel, and the stress state is pressure-bearing. Among them, the sleeve 23, the positioning shaft 21 and the screw blade 22 are made of steel with a yield strength of not less than 235 MPa, and 20# steel can be used, and the outer surface can be galvanized with an anti-corrosion layer to ensure that the screw positioning pile 20 can be used normally within the design service life. In addition, the sleeve 23 and the positioning shaft 21 are connected by welding to ensure the stability of the connection between the positioning shafts 21 .

In one embodiment, the geotechnical bag concrete skeleton 10 includes a geotechnical bag and concrete slurry filled in the geotechnical bag.

Wherein, the geotechnical bag belongs to geosynthetics, including upper and lower layers of fabric, along the vertical and horizontal directions of the geotechnical bag, nylon ropes of 7cm to 10cm are arranged at intervals of 25cm to 30cm, and the nylon ropes are used for It is used to connect the upper and lower layers of fabric together to control the thickness of the infusion molding.

In addition, the average thickness of the concrete slurry is 200mm, the strength is C20, and the filling pressure should be 0.2MPa-0.3MPa; the amount of concrete slurry should be large, accounting for about 23% of the total, and the sand rate of the mold bag concrete should be 40%. Around, the maximum particle size is preferably 5mm ~ 10mm, mixed with a certain amount of fly ash, mixed with concrete superplasticizer or pumping agent.

The geomembrane bag is filled with concrete slurry. The concrete sand rate of the mold bag is determined according to the construction fluidity and the difficulty of filling the geotechnical mold bag with the concrete mixture. Due to the high fluidity of concrete, the sand rate has a great influence on the workability of the concrete mixture. If the sand rate is not appropriate, bleeding and stone segregation are prone to occur. According to the sand rate of general high fluidity concrete, although it can meet the needs of pumping construction, it will be difficult to fill the geomold bag. The sand rate must not only meet the requirements of pumping, but also meet the requirements of filling geomembrane bags. Therefore, the amount of cement slurry in the bagged concrete should be large, generally accounting for about 23% of the total concrete.

In the process of selecting the sand rate of filling concrete, a large sand rate will reduce the strength of the concrete, so the concrete strength should be considered when selecting the sand rate. Among them, the mold bag concrete sand rate is about 40%. The maximum particle size of stones is determined by the thickness of the geomembrane bag. If the geomembrane bag can be filled with 200mm thick concrete, the maximum particle size should be 5mm to 10mm. If the stone is too large, it is not suitable to fill the geomembrane bag.

Further, fly ash is added to the concrete mixture. Concrete mixtures require more cementitious materials, all of which are wasteful with cement and mixed with a certain amount of fly ash. It can not only increase the fluidity of the concrete mixture, but also replace part of the cement and save costs. Generally, the excess replacement method is used. In addition, concrete superplasticizer or pumping agent is mixed into the concrete mixture. Adding the admixture (concrete high-efficiency water reducer or pumping agent) can reduce water consumption, save some cement, and increase workability at the same time.

The geotechnical bag concrete skeleton 10 is protected by planting grass, which can effectively improve the soil layer, increase the shear strength of the soil layer, and meanwhile, the plants can disperse the runoff effect and reduce the scour of the slope.

In one embodiment, a method for reinforcing a loess slope comprises the steps of:

Screw the spiral positioning pile 20 into the slope surface fixed on the loess slope 30;

The geotechnical bag concrete skeleton 10 is manufactured on the slope surface of the loess slope 30 , and the spiral positioning pile 20 is connected to the geotechnical bag concrete skeleton 10 .

The above-mentioned reinforcement construction method of the loess slope has the same beneficial effect as the reinforcement structure of the loess slope, and will not be repeated here.

The reinforcement method of the loess slope described in the present embodiment is described in detail below:

Step S10, construction of screw positioning pile 20

Construction preparation: the site is level, and before the construction of the spiral positioning pile 20, remove all obstacles on the ground and underground. If the ground surface is soft, you can fill in 0.5-1.0m thick gravel soil or sand cushion to prevent the instability of the construction machinery; According to the designed construction drawing and coordinate network points, measure and place the pile position; determine the pile position, determine the pile position on the construction axis, compile the pile number, and measure the ground elevation of each pile position according to the reference point. The pile position shall be measured and designed strictly according to the drawings, and the deviation shall not be greater than 50mm.

Screw in the screw spud 20, and the torque electric motor is in place. Install the spiral positioning pile 20 to the torque electric motor drill bit, align the pile position, measure the angle with a square, and stop the rotation when the spiral positioning pile 20 is 20cm above the ground, and reserve the pile head for splicing.

Splice another spiral positioning pile 20 as required, and continue to screw the spiral positioning pile 20 into the soil. The screwing process requires the same operation as the previous screw spud 20 . Wherein, it is required that the spiral positioning pile 20 is screwed in every 2m to check the control angle with a square ruler. Repeat this step until the length of the spiral positioning pile 20 reaches the designed pile length.

The torque electric motor shifts, and after the construction of the previous spliced spiral positioning pile 20 is completed, the torque electric motor shifts to the position of the next pile for construction.

Step S20, geomembrane bag concrete skeleton construction

The whole slope and geotechnical bag laying, side slope finishing, remove tree roots, weeds, garbage, waste residue and other obstacles on the original slope. The lateral shrinkage must be reserved when laying the geotechnical bag. The thickness of the loop is 15cm-25cm, the lateral shrinkage is controlled at about 20cm, and the upper end should have a shrinkage allowance of about 4% of the slope length. Wherein, the lap width between the geotechnical bag and the existing geotechnical bag concrete skeleton 10 on the slope is controlled at 30 cm, so as to ensure that the newly laid geotechnical bag is perpendicular to the slope axis without deflection.

In order to prevent the geotechnical bag from sliding down the slope, at the top of the slope, the upper edge of the geotechnical bag should be properly set with positioning piles. The distance between the positioning piles is set to 1.5m, and there are no less than 4 pieces of each geotechnical bag. Set up a positioning pile at the interface of the small unit of the geotechnical bag, and use a nylon rope to tie the steel pipe that penetrates the geotechnical bag through the pipe hole. The other end is connected with the positioning pile through a tensioning device.

Further, to ensure that the geotechnical bag is laid tight and flat, it is necessary to roll the geotechnical bag. First, the steel pipe is inserted into the upper and lower edge sleeves, and the geotechnical bag is rolled on the steel pipe. In order to lay the geotechnical bag The position is accurate, and the roll mold bag should be rolled up from the inner and outer slope feet of the geotechnical mold bag to the top of the slope.

Step S30, the mix design of composite geotechnical concrete, first prepare materials: cement, 32.5 grade ordinary Portland cement; fine aggregate, sand, fineness modulus 2.4-2.8; Diameter 5mm～10mm; Admixture: high-efficiency water reducer/pumping agent; fly ash: Ⅱ grade.

The concrete design strength is C20, and the slump is controlled at 180mm-220mm; according to the construction area, the details of each material are as follows:

Step S40, filling concrete slurry. Before filling, the geotechnical bag cloth should be wetted with water to prevent the concrete slump from becoming smaller due to the geotechnical bag cloth absorbing water and affecting the fluidity of the concrete. The perfusion speed is controlled at 8m ³ /h～12m ³ /h, and the outlet pressure is 0.2MPa～0.3MPa. Concrete is filled in the order of row-by-row and bin-by-bin from bottom to top. When filling each row, it is filled from the side where the geotechnical bag overlaps to the other side, that is, the geotechnical bag is filled alternately. It is convenient to grasp the position of the slope shoulder of the mold bag, reduce the pressure on the geotechnical bag and avoid the lateral displacement caused by the lateral shrinkage of the geotechnical bag, thus ensuring the tightness of the joint. When filling, the operator should be careful to fill the cuff, and continue to step on it to fill it up, and the gas should be fully discharged, so that the mold bag concrete being filled is close to the slope.

Step S50, capping, edge-sealing and top processing. After the mold bag is filled, the connection, capping and edge sealing are performed. For boundary treatment, it is necessary to do a good job of embedding geomembrane and mold bags at the lateral boundary of slope protection. For the longitudinal treatment of the slope protection boundary, it is necessary to ensure the good connection of each section of the slope protection to make it stable. The concrete edge of the roof and edge banding shall be straight and the top shall be flat.

Step S60, clean up the site, after the filling is completed, clean up the site, and move the supplies and utensils used for filling to the next construction unit.

Step S70 , after the filling of the curing concrete is completed, the residues and garbage on the surface of the bagged concrete are cleaned with water in time to ensure that the surface is clean and beautiful. Within 24 hours after the mold bag concrete filling is completed, it is forbidden for people to step on it and put heavy objects under pressure, and water it in time for maintenance.

Step S80, vegetation construction. Slope surface treatment, properly level the slope surface, cut or iron the anti-seepage geomembrane, and directly plant soil on the slope with a loose soil thickness of about 10cm; for sowing and covering, grass seeds should be mixed with suitable fine sand, and the seeds should be spread evenly. After sowing, the slope is compacted, then covered with geotextile, and fixed on the slope. Sprinkle water in time after sowing for maintenance. When the slope soil is dry, it should be watered for several days to maintain a suitable moisture level in the soil.

The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, should be considered as within the scope of this specification.

The above-mentioned embodiments only express several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but should not be construed as limiting the patent scope of the invention. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Claims (10)

1. a kind of ruggedized construction of loess slope characterized by comprising

Geotechnical fabric bag concrete skeleton, the geotechnical fabric bag concrete skeleton are used to be layed in the slope surface of loess slope；And

Spiral positioning stake, the spiral positioning stake are used to be embedded in the inside of the loess slope, the spiral positioning stake and institute Geotechnical fabric bag concrete skeleton is stated to be connected.

2. the ruggedized construction of loess slope according to claim 1, which is characterized in that it further include auxiliary positioning plate, it is described Auxiliary positioning plate is layed on the geotechnical fabric bag concrete skeleton, and the geotechnical fabric bag is run through in the end of the spiral positioning stake It is connected after concrete skeleton with the auxiliary positioning plate.

3. the ruggedized construction of loess slope according to claim 2, which is characterized in that the spiral positioning stake is spiral steel Stake, the auxiliary positioning plate are steel plate；The spiral positioning stake is two or more, and the auxiliary positioning plate is two or more, institute State auxiliary positioning plate to the spiral positioning stake is corresponding one by one is arranged.

4. the ruggedized construction of loess slope according to claim 2, which is characterized in that the spiral positioning stake with it is described auxiliary Positioning plate is helped to be equipped with two rows, wherein spiral positioning stake described in spiral positioning stake described in a row and another row mutually staggers setting； The pile crown of the spiral positioning stake is set at the node of the geotechnical fabric bag concrete skeleton.

5. the ruggedized construction of loess slope according to claim 4, which is characterized in that wherein spiral positioning stake described in a row It is arranged in the position between the slope height on 2/5 slope up to 1/2 of the loess slope, spiral positioning stake described in another row is arranged in Position between the slope height on 1/4 slope up to 2/5 of the loess slope.

6. the ruggedized construction of loess slope according to claim 2, which is characterized in that the auxiliary positioning plate be connected with The pile crown of the compatible casing of pile crown of the spiral positioning stake, described sleeve pipe and the spiral positioning stake, which is socketed, to be connected；It is described Auxiliary positioning plate and the outer encapsulating of the pile crown of the spiral positioning stake have concrete slurry.

7. the ruggedized construction of loess slope according to claim 1, which is characterized in that the spiral positioning stake and the Huang Angle between the slope surface of native side slope is 60 degree to 120 degree；The spiral positioning stake extend into the potential cunning of the loess slope Soil layer region within face.

8. according to claim 1 to the ruggedized construction of loess slope described in 7 any one, which is characterized in that the spiral is fixed Position stake is spliced pile body；The spiral positioning stake includes more than two locating shafts, helical blade, sleeve and connector；Two A the above locating shaft is sequentially connected, and is connected between the adjacent locating shaft by the sleeve, the sleeve passes through connection It is fixedly linked between part and the locating shaft, the helical blade is set around on the lateral wall of the locating shaft.

9. according to claim 1 to the ruggedized construction of loess slope described in 7 any one, which is characterized in that geotechnique's mould Bag concrete skeleton includes geotechnical fabric bag, and the concrete slurry being filled in the geotechnical fabric bag；The geotechnical fabric bag belongs to Geosynthetics, including upper layer and lower layer fabric, the both direction in length and breadth along the geotechnical fabric bag is every 25cm~30cm distance It is equipped with the nylon rope of 7cm~10cm, the nylon rope is for linking together upper layer and lower layer fabric；The geotechnical fabric bag is mixed It is protected on solidifying soil skeleton using grass planting.

10. a kind of reinforced construction method of loess slope, which comprises the steps of:

Spiral positioning stake screw-in is fixed within the slope surface of loess slope；

Geotechnical fabric bag concrete skeleton is manufactured in the slope surface of loess slope, and makes the spiral positioning stake and the geotechnological mould Bag concrete skeleton is connected.