CN114197496B - Side slope reinforcing device of railway roadbed and construction method - Google Patents

Abstract

The invention discloses a side slope reinforcing device of a railway roadbed and a construction method, wherein the side slope reinforcing device comprises a reinforced concrete slab, an anchor rod pile, a tree root pile and a concrete foundation; the anchor rod pile is inserted into the slope surface of the railway roadbed side slope, the reinforced concrete slab is paved on the surface layer of the slope surface, the tree root pile is inserted into the slope toe and is positioned below the reinforced concrete slab, and a concrete foundation is poured at the slope toe; the anchor rod pile and the tree root pile have the same structure and respectively comprise a grout stopping plate, a trapezoidal sleeve and a pile body steel rail; the grout stopping plate is welded at one end of the pile body steel rail, the trapezoid sleeve is sleeved outside the pile body steel rail and fixed together with the pile body steel rail, the grout stopping plate is provided with a grout injecting hole, concrete is poured into the trapezoid sleeve through the grout injecting hole, and the waist plate of the trapezoid sleeve is provided with a plurality of grout outlet holes.

Description

Slope reinforcement device and construction method for railway embankment

technical field

The invention relates to the field of slope protection engineering, in particular to a slope reinforcement device and a construction method for railway roadbeds.

Background technique

The old railway was affected by the surrounding environment, and various problems began to appear, such as the erosion of the track, the instability of the roadbed, etc. These problems seriously affected the traffic safety and overall service level of the railway traffic line.

In the application with the patent publication number of CN111962532A, a construction method for reinforcing the slope of the existing railway subgrade with high-pressure rotary grouting piles is disclosed. The construction method is to use the existing concrete piles to pour the slope For reinforcement, the construction process of this construction method is cumbersome, and no local materials are obtained, resulting in a waste of resources.

Contents of the invention

In order to solve the technical problems existing in the prior art, the present invention proposes a new railway embankment slope reinforcement device and construction method. Reasonable utilization and optimal configuration.

To achieve the above object, the present invention adopts the following scheme:

The present invention proposes a slope reinforcement device for railway embankment, comprising reinforced concrete slabs, anchor piles, tree root piles and concrete foundations; the anchor piles are inserted into the slope of the railway embankment slope, Concrete slabs are laid on the surface of the slope, the root stakes are inserted at the foot of the slope and located under the reinforced concrete slab, and a concrete foundation is poured at the foot of the slope;

The anchor piles and tree root piles have the same structure, and each includes a slurry-stopping plate, a trapezoidal sleeve and a pile body rail; the described slurry-stopping plate is welded on one end of the pile body rail, and the trapezoidal sleeve is sleeved on the pile body rail Outside, it is fixed with the steel rail of the pile body, and grouting holes are set on the grout stop plate, through which concrete is poured into the trapezoidal sleeve, and several grouting holes are set on the waist plate of the trapezoidal sleeve.

As a further technical solution, a part of the steel bars inside the reinforced concrete slab is replaced by reinforced steel rails.

As a further technical solution, the reinforced rails include a plurality of rails arranged in sequence, and several connection holes are drilled at the rail waist of each rail, and the threaded steel bars pass through the connection holes to connect the multiple rails into a whole, and the ends of the steel bars are bent After folding, it is welded to the rail.

As a further technical solution, the reinforced steel rails are arranged longitudinally along the slope, the reinforced steel rails have a set distance from the bottom of the reinforced concrete slab, and are fixed with braces.

As a further technical solution, the anchor piles are driven downward into the soil along the horizontal direction, located in the longitudinal middle of the reinforced concrete slab and at the end far away from the slope foot, in two rows, and two anchor piles are driven into each row.

As a further technical solution, the pile body rail is provided with a notch at one end connected to the anti-slip plate.

As a further technical solution, the cross-section of the trapezoidal sleeve is isosceles trapezoidal, and a diameter circular hole is drilled in the middle of the waist plate of the sleeve, and the threaded steel bar connects the trapezoidal sleeve and the rail of the pile body, and the two ends are bent and fixed.

As a further technical solution, the slurry stop plate is isosceles trapezoidal, the upper part of the slurry stop plate is a columnar handle, and the middle of the lower part is a cube convex, which is used for welding after fitting with the notch of the rail of the pile body. There are grouting holes.

As a further technical solution, the root pile is driven vertically downward into the soil, and the upper part of the root pile is welded with a steel rail.

As a further technical solution, the concrete foundation and the reinforced concrete slab are poured together to fix and connect the reinforced concrete slab and the tree root pile.

In a second aspect, the present invention also provides a construction method for a slope reinforcement device for a railway embankment, comprising the following steps:

Step A, modifying the slope according to the design slope, setting out and positioning the reinforced concrete slab to determine the axis, contour and slope, determining the positions of the anchor pile holes and tree root pile holes, and excavating the reinforced concrete slab foundation groove and the concrete foundation groove;

Step B: Drilling the position of the anchor pile by dry drilling, the drill hole is a trapezoidal shape close to the anchor pile, and then cleaning the hole, and welding the protrusion of the slurry plate and the notch of the rail of the pile body after fitting , insert the trapezoidal sleeve into the pile rail, use steel bars to fix the trapezoidal sleeve and the pile rail, then weld the trapezoidal sleeve and the slurry plate, put the prepared anchor pile into the drilled hole, fix the position and inject slurry treatment;

Step C, the position of the tree root pile is drilled by dry drilling, the hole is a trapezoidal shape close to the tree root pile, and then the hole is cleaned. The preparation steps of the tree root pile are the same as the anchor pile, and the prepared tree root pile is vertically Put it into the drilled hole, carry out grouting treatment, use cement plug to seal the hole, and weld it with steel rail on the upper part of the tree root pile;

Step D, install the reinforced concrete slab and the formwork device of the concrete foundation in the excavated foundation groove, use braces inside to fix the position of the reinforced rail, insert the threaded steel bar through the round hole of the reinforced rail to connect, and bend the end of the steel bar Fitting and welding with the reinforced steel rail, mixing the concrete evenly, pouring concrete into the formwork until the concrete slab and the concrete foundation are formed, after the pouring is completed, sprinkle water for maintenance, and finally remove the formwork.

The beneficial effects of the present invention are as follows:

(1) The side slope reinforcement device and construction method of a railway subgrade provided by the present invention can effectively restrain the side slope surface after the arrangement is completed, prevent the side slope from slipping, and can be applied to the reinforcement project of the subgrade side slope .

(2) a kind of side slope reinforcing device and construction method of railway embankment provided by the present invention, use waste and old steel rail to replace original reinforcement cage and steel pipe in reinforced concrete slab, anchor pile and tree root pile, and by The structure and structure of reinforced concrete slabs, anchor piles and tree root piles are rationally designed. On the one hand, it achieves the purpose of rationally utilizing waste materials, turning waste into treasure, and reducing costs. On the other hand, it realizes the reinforcement of the slope.

(3) The slope reinforcement device and construction method of a railway embankment provided by the present invention uses a trapezoidal sleeve, which can not only fix the internal pile rail, but also saves materials compared with conventional circular sleeves. The cost is lower.

(4) A kind of side slope reinforcing device and construction method of railway embankment provided by the present invention use the means of slope protection combined with anchor piles, reinforced concrete slabs and tree root piles. The reinforced concrete slab can effectively protect the slope from erosion and prevent the spalling of the soil on the slope; the anchor piles and tree root piles can support different positions on the potential sliding surface of the slope.

(5) In the slope reinforcement device and construction method of a railway embankment provided by the present invention, the anchor pile and the tree root pile are jointly connected with the reinforced concrete slab, and the reinforced concrete slab is tightly fixed.

Description of drawings

The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention, and the schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations to the present invention.

Figure 1 is the slope and reinforcement layout;

Figure 2 is a schematic diagram of the layout of the reinforced rail;

Fig. 3 is the schematic diagram of anchor pile and tree root pile;

Fig. 4 is the detailed structural diagram of anchor pile and tree root pile;

Figure 5 is a schematic diagram of a slurry plate;

Fig. 6 is a schematic diagram of pile rail;

Among them, 1. Reinforced concrete slab, 2. Anchor pile, 3. Tree root pile, 4. Concrete foundation, 5. Reinforced steel rail, 6. Threaded steel bar, 7. Grout stopper, 8. Trapezoidal sleeve, 9. Pile rail, 10, grout hole, 11, threaded steel bar, 12, handle, 13, grouting hole, 14, protrusion, 15, notch, 16, bore.

Detailed ways

It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

It should be noted that the terminology used here is only for describing specific embodiments, and is not intended to limit exemplary embodiments according to the present invention. As used herein, unless the invention clearly states otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprising" and/or "comprising" are used in this specification, their Indicate the presence of features, steps, operations, means, components and/or combinations thereof;

Explanation of terms: The "reinforced steel rail" mentioned in the present invention means that the steel rails are connected by threaded steel bars, so it is named "reinforced steel rail". "Slope longitudinal direction" in the present invention refers to the slope line direction.

This embodiment proposes a slope reinforcement device for railway subgrade, which mainly consists of the following parts, including a reinforced concrete slab 1 laid on the slope of the subgrade, anchor piles 2, tree root piles 3 and concrete foundation 4; The anchor piles 2 are inserted in the slope of the railway embankment slope, the reinforced concrete slab 1 is laid on the surface of the slope, the root pile 3 is inserted in the foot of the slope and is located below the reinforced concrete slab, and at the foot of the slope A concrete foundation is poured at the place; the structure of the anchor pile 2 and the tree root pile 3 is the same, each including a slurry-stopping plate, a trapezoidal sleeve and a pile rail; the slurry-stopping plate is welded on one end of the pile body rail, and the trapezoidal sleeve is set on the Outside the steel rail of the pile body, it is fixed with the steel rail of the pile body. A grouting hole is provided on the grout stop plate, and concrete is poured into the trapezoidal sleeve through the grouting hole, and several grouting holes are set on the waist plate of the trapezoidal sleeve. In the economical and reliable slope reinforcement device provided by the present invention, the reinforced concrete slab, the anchor pile and the tree root pile use waste steel rails to replace the original steel cage and steel pipe, and through the reinforcement of the reinforced concrete slab, the anchor pile and the The structure and structure of the tree root pile are designed reasonably, on the one hand, it achieves the purpose of rational use of waste materials, turning waste into treasure, and reducing costs, and on the other hand, it realizes the reinforcement of the edge.

Furthermore, in this embodiment, a part of the steel bars inside the reinforced concrete slab 1 laid on the slope of the roadbed is replaced by the reinforced steel rail 5. Compared with the prior art, the waste materials are rationally used to turn waste into wealth and reduce costs. And the preferred concrete used for the reinforced concrete slab 1 laid in the present embodiment is C25 type ordinary concrete, the thickness is preferably 0.3m, the longitudinal length along the slope is 6m, and the horizontal width is 3m. On the slope, the depth of the concrete slab embedded in the soil is preferably 0.2m. Further, the reinforced rails used in this embodiment are formed by connecting discarded 50kg/m standard rails with threaded steel bars. After cutting, the length of each standard rail is preferably 6m, and holes are drilled at the rail waist and then connected with threaded steel bars 6 The reinforced steel rail 5 is made, and the standard rails of the reinforced steel rail 5 are arranged longitudinally along the slope. Preferably, 10 standard rails are arranged in a reinforced concrete slab 1, and the interval between adjacent standard rails is 0.3m. The distance from the bottom of the reinforced concrete slab 1 is 70mm, and it is fixed with a Φ12HRB400 brace.

Further, a round hole is drilled in the middle of the rail waist of the standard rail, the preferred diameter is 20mm, the round holes at both ends are 0.2m away from the rail end, and the distance between the inner round holes is 0.4m, and there are 15 round holes in total, and then use 15 threaded steel bars 6 of model Φ18HRB400 are interspersed with the round holes of 10 reinforced steel rails for connection and fixation. The ends of threaded steel bars 6 are bent and welded to the rails, so that multiple standard rails are connected into a whole with a certain strength. .

Further, the anchor pile 2 is composed of three parts: a grout stop plate 7 , a trapezoidal sleeve 8 and a pile rail 9 , and is used to fix the slope soil and the reinforced concrete slab 1 . Anchor piles 2 are driven downward into the soil along the horizontal direction, preferably, the angle is 15°, anchor piles 2 are located in the middle of the longitudinal direction of the reinforced concrete slab 1 and one end away from the foot of the slope, and there are two rows as shown in Figure 1. Preferably, two anchor piles 2 are driven into each row, the pile distance is 1.5m, the distance between the anchor pile 2 and the side of the reinforced concrete slab 1 is 0.75m, and the distance between the top anchor pile 2 and the top surface of the reinforced concrete slab 1 is 0.3m.

Further, the pile body rail 9 also adopts the discarded 50kg/m standard rail, its preferred length is 6m, and a hole 16 is drilled in the middle of the rail waist. Flow; preferably, the diameter of the borehole 16 is 20mm, the distance between the two round holes and the rail end is preferably 0.2m, and the distance between the inner round holes is 0.4m, so there are 15 holes in total.

Further, in this embodiment, the pile body rail 9 cuts a rectangular parallelepiped notch 15 with a width of 50 mm and a depth of 50 mm at the end of the pile body rail 9 connected to the slurry stop plate 7. Of course, it is not difficult to understand that the notch 15 Other shapes and other dimensions are also possible.

Further, the preferred material of the trapezoidal sleeve 8 is Q235A carbon structural steel, the length is 6m, the cross section is isosceles trapezoidal, the upper bottom width of the inner section is 74mm, the lower bottom width is 160mm, and the height is 155mm , the thickness of the sleeve is 10mm, drill a round hole with a diameter of 25mm in the middle of the waist plate of the sleeve, 0.2m and 3m away from the end of the slurry plate 8, and connect the trapezoidal sleeve 8 and the pile body rail with the threaded steel bar 11 of model Φ18HRB400 9. The two sections are bent and fixed, and the circular slurry hole 10 is evenly drilled below 1.5m of the sleeve waist plate. The diameter of the slurry hole 10 is preferably 10mm. The invention uses the trapezoidal sleeve, which not only can fix the internal pile rail, but also saves more material and lower cost compared with the conventional circular sleeve.

Further, the preferred material of the slurry stop plate 7 is Q235A carbon steel. The cross section of the slurry stop plate 7 is isosceles trapezoidal, and its size is preferred. The width of the upper bottom is 150mm, the width of the lower bottom is 215mm, and the height is 235mm, the thickness is 10mm, the upper part of the slurry plate 7 is a cylindrical handle 12, the middle of the lower part is a cube convex 14, and the length is 30mm, which is used for welding after fitting with the notch 15 of the pile rail 9, and on the convex 14 There are two grouting holes 13 with a diameter of 32mm on the left and right. The grout stop plate 7 and the trapezoidal sleeve 8 are welded after bonding. The function of the grouting holes 13 is mainly used for grouting into the pile body in the later stage.

Further, the tree root pile 3 is composed of three parts passing through the pulp stop plate 7, the trapezoidal sleeve 8 and the pile rail 9, and its structure is the same as that of the anchor pile 2. The root pile 3 has a length of 6m and is located at the foot of the slope, below the reinforced concrete slab 1, and is driven into the soil vertically downwards. There are 3 piles in total with a pile distance of 1.2m. m rail welding.

Further, the concrete foundation 4 and the reinforced concrete slab 1 are poured together to fixedly connect the reinforced concrete slab 1 and the tree root pile 3. In this embodiment, the concrete foundation material 4 is preferably C25 type ordinary concrete, and its length is 3m , with a width of 0.5m, a height of 0.7m, and a depth of 0.2m.

Further, this embodiment also proposes a method for reinforcing the slope using the above-mentioned slope reinforcement device for the railway embankment, including the following steps:

Step A, modify the slope according to the design slope, carry out lofting and positioning on the reinforced concrete slab 1 to determine the axis, contour and slope, determine the positions of the anchor pile holes and tree root pile holes, excavate the foundation groove of the reinforced concrete slab 1 and the concrete foundation 4 Foundation trench, depth 0.2m;

Step B, dry-drilling is used to drill the anchor pile 2, the drill hole is trapezoidal close to the anchor pile, and then the hole cleaning process is carried out, and the protrusion 14 of the grout stop plate 7 and the notch of the pile rail 9 15 Welding after bonding, put the trapezoidal sleeve sleeve 8 into the pile body rail 9, insert the steel bar 11 into the trapezoidal sleeve 8 and the pile body rail 9, fix the trapezoidal sleeve 8 and the pile body rail 9 with the steel bar 11, and then weld Trapezoidal sleeve 8 and grout stop plate 7, put the prepared anchor pile 2 into the borehole, fix the position and perform grouting treatment, the grouting pressure is 0.3-0.5MPa, the holding time is 20min, and the hole is sealed with cement plug , the sealing depth is 1.5m;

Step C: Drilling the position of the tree root pile 3 by means of dry drilling, the drill hole is a trapezoidal shape close to the tree root pile, and then cleaning the hole, the preparation steps of the tree root pile 3 are the same as the production steps of the anchor pile 2 in step 2 , put the prepared tree root pile 3 vertically into the borehole, and perform grouting treatment. The grouting pressure is 0.3-0.5Mpa, and the holding time is 20min. The upper part of the pile is welded together with a steel rail with a length of 2.5m;

Step D, install the reinforced concrete slab 1 and the formwork device of the concrete foundation 4 in the excavated foundation trench, use braces inside to fix the position of 10 reinforced steel rails 5, and insert the threaded steel bars 6 through the reinforced steel rails 5 to connect, After the end of the threaded steel bar 6 is bent, it is bonded and welded with the reinforced steel rail 5, the concrete is stirred evenly, and the concrete is poured into the formwork until the concrete slab 1 and the concrete foundation 4 are poured into shape. 7 days, and finally demoulding.

The economical and reliable side slope reinforcement device provided by the present invention can sufficiently and effectively restrain the side slope surface after the arrangement is completed, prevent the side slope from slipping, and can be applied to the reinforcement project of the roadbed side slope.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (8)

1. A side slope reinforcing device of a railway roadbed is characterized by comprising a reinforced concrete slab, anchor rod piles, tree root piles and a concrete foundation; the anchor rod pile is inserted into the slope surface of the railway roadbed side slope, the reinforced concrete slab is paved on the surface layer of the slope surface, the root pile is inserted into the slope toe and is positioned below the reinforced concrete slab, and a concrete foundation is poured at the slope toe;

the anchor rod pile and the root pile have the same structure and respectively comprise a grout stopping plate, a trapezoidal sleeve and a pile body steel rail; the grout stopping plate is welded at one end of the pile body steel rail, the trapezoid sleeve is sleeved outside the pile body steel rail and fixed with the pile body steel rail, the grout stopping plate is provided with a grout injecting hole, concrete is poured into the trapezoid sleeve through the grout injecting hole, and a waist plate of the trapezoid sleeve is provided with a plurality of grout outlet holes;

the concrete foundation and the reinforced concrete slab are cast together;

part of steel bars in the reinforced concrete slab are replaced by reinforced steel rails;

the reinforced steel rails are longitudinally arranged along the slope, have a set distance from the bottom of the reinforced concrete slab and are fixed by using the supporting ribs;

and waste steel rails are adopted in the reinforced concrete slab, the anchor rod pile and the root pile.

2. The slope reinforcing apparatus for a railroad bed of claim 1, wherein the reinforcement rails include a plurality of rails and reinforcing bars arranged in sequence, a plurality of connecting holes are drilled at the web of each rail, the reinforcing bars pass through the connecting holes to connect the plurality of rails into a whole, and the ends of the reinforcing bars are bent and then welded to the rails.

3. The slope reinforcement for a railroad bed according to claim 1, wherein the anchor piles are driven into the soil body in two rows in the middle of the longitudinal direction of the reinforced concrete slab and at the end away from the toe, and two anchor piles are driven in each row.

4. The slope reinforcement for a railroad bed of claim 1, wherein said piling rail is notched at its end connected to the grout stop.

5. The slope reinforcing apparatus for railroad bed of claim 4, wherein the grout stop plate is an isosceles trapezoid, the upper portion of the grout stop plate is a columnar grip, the middle portion of the lower portion of the grout stop plate is a flange for welding after being attached to the notch of the steel rail of the pile body, and grouting holes are formed on the left and right of the flange.

6. The slope reinforcing apparatus for railroad bed of claim 5, wherein the cross section of the trapezoid sleeve is isosceles trapezoid, a diameter circular hole is drilled in the middle of the sleeve waist plate, and the screw steel bar is connected with the trapezoid sleeve and the pile body steel rail, and both ends are bent and fixed.

7. The slope reinforcing apparatus for a railroad bed according to claim 1, wherein the root piles are driven vertically downward into the soil body, and the upper portions of the root piles are welded by rails.

8. The method for constructing a slope reinforcement apparatus for a railroad bed according to any one of claims 1 to 7, comprising the steps of:

step A, finishing a slope surface according to a designed gradient, lofting and positioning a reinforced concrete plate to determine an axis, an outline and the gradient, determining positions of an anchor rod pile hole and a tree root pile hole, and excavating a reinforced concrete plate foundation trench and a concrete foundation trench;

b, drilling the anchor rod pile position, wherein the drilled hole is a trapezoid close to the anchor rod pile, then cleaning the hole, welding a convex opening of a grout stop plate after being attached to a notch of a pile body steel rail, sleeving a trapezoid sleeve into the pile body steel rail, fixing the trapezoid sleeve and the pile body steel rail by using a steel bar, then welding the trapezoid sleeve and the grout stop plate, placing the prepared anchor rod pile into the drilled hole, and performing grouting treatment after the position is fixed;

c, drilling the position of the root pile, wherein the drilled hole is in a trapezoid shape close to the root pile, then cleaning the hole, the root pile preparation step is the same as that of the anchor rod pile in the step B, the prepared root pile is vertically placed into the drilled hole for grouting treatment, a cement plug is adopted for sealing the hole, and the upper part of the root pile is welded into a whole by a steel rail;

and D, installing a template device of the reinforced concrete slab and the concrete foundation in the excavated foundation trench, fixing the position of the reinforced steel rail by using a supporting rib inside the template device, inserting a twisted steel bar into a circular hole of the reinforced steel rail for connection, bending the tail end of the steel bar, then jointing and welding the bent steel bar and the reinforced steel rail, stirring the concrete, pouring the concrete into the template until the concrete slab and the concrete foundation are formed, maintaining after pouring is finished, and finally removing the template.

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