Slope protection structure combining permanent and temporary structures

Abstract

The application relates to the embankment filling technical field and particularly discloses a permanent and temporary combined side slope protection structure, which comprises a side slope with one side being open and a line arranged on the side slope; an embankment for filling is arranged on one side of the side slope; a reinforcing structure is arranged on one side of the embankment; the reinforcing structure comprises a geogrid laid on the embankment and a wrapping body arranged in the geogrid; through the design of the reinforcing rib and the wrapping body, transverse resistance is provided by the friction between the ballast and the filler, the stability of the temporary side slope is effectively enhanced, sliding and collapse are prevented, the use of the geotextile provides scour protection for the side slope, rainwater scouring and soil erosion are effectively prevented, the integrity of the side slope is maintained, the temporary protection demand during construction is met, the permanent structure can be used as part of the permanent structure, resource optimization is realized, and the overall construction cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the embankment filling technical field, specifically to a permanent and temporary combined slope protection structure. BACKGROUND

[0002] With the continuous expansion of the high-speed railway network, sometimes it is necessary to parallel or merge the new railway line with the existing railway line. In this case, the existing roadbed often needs to be modified. Since the new railway line is very close to the existing railway line, and in order to ensure the normal operation of traffic, the existing railway line cannot be shut down, so effective and appropriate construction technical measures need to be taken to ensure the quality of the newly constructed line while ensuring the safe operation of the existing line. This usually means that the angle of the new fill slope is relatively steep, increasing the difficulty of construction. Therefore, reinforcing and protecting the newly formed temporary slope during the filling construction has become an important technical link.

[0003] For slope protection in a limited space, the current main method is to use retaining protection technology, such as using retaining walls, etc. However, this traditional method has some obvious shortcomings: including large amount of material consumption, high cost, difficult to remove, etc. In addition, if these retaining walls are retained and buried in the roadbed as part of the permanent structure in the later stage of the project, it may also cause the problem of uneven stiffness distribution. Especially when widening the roadbed in stages, stable connection between the new and old roadbeds is also a challenge that needs to be solved. Based on this, the present application provides a permanent and temporary combined slope protection structure. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application provides a permanent and temporary combined slope protection structure, which solves the problems of the current main slope protection method of retaining protection, the retaining wall has the problems of large amount of material consumption, high cost, difficult to remove, etc. If it is retained and buried in the roadbed as a permanent project in the later stage, there is also the risk of uneven stiffness, and when widening the roadbed in stages, it is difficult to form a stable connection between the new and old roadbeds.

[0005] The permanent and temporary combined slope protection structure of the present application comprises a slope with one side open and a line arranged on the slope, a road embankment for filling is arranged on one side of the slope, a reinforcing structure is arranged on one side of the road embankment, the reinforcing structure comprises a geogrid arranged on the road embankment and a wrapping body contained in the geogrid, the wrapping body has one or more and is arranged in sequence at a preset angle, and the outer side of the wrapping body is further covered with a layer of geotextile which is spread flat along the open side of the slope.

[0006] The top surface of the road embankment is also paved with a reinforcing bar, and the reinforcing bar has one or more and is uniformly spaced along the direction of the line and is overlapped, and the stress direction is arranged perpendicular to the direction of the line, and after being arranged flat, it is fixed by fasteners.

[0007] As a further improvement of the present application, one end of the reinforcing bar extends to one side of the wrapping body and is folded back along the outer side of the wrapping body to wrap the wrapping body.

[0008] As a further improvement of the present application, the wrapping body comprises a wrapping bag and a filler filled into the inner side of the wrapping bag, and the outer side of the wrapping bag is further provided with a frame body in contact with the wrapping bag.

[0009] As a further improvement of the present application, the frame body comprises an outer frame, and the inner side of the outer frame is roughened to fit the outer side of the wrapping bag.

[0010] As a further improvement of the present application, the wrapping bag comprises a woven belt woven into a wrapping area adapted to the filler.

[0011] As a further improvement of the present application, the top of the outer frame is provided with a fitting groove, a sealing cover is installed at the fitting groove, the sealing cover is arranged at the top of the wrapping body, one or more insertion holes are arranged at the cover of the sealing cover, and a connecting piece is installed at the insertion hole to connect two outer frames.

[0012] As a further improvement of the present application, one end of the geogrid is bent at a preset angle near the wrapping body, and a sewing rod is arranged at the bent portion.

[0013] As a further improvement of the present application, one end of the geotextile extends to the toe of the slope and is pressed onto one side of the slope by a fixing piece.

[0014] As a further improvement of the present application, the line comprises a railway I, a railway II and a railway III, and the railway III is an existing railway.

[0015] Compared with the prior art, the present application has the following advantages:

[0016] The present application provides transverse resistance by the friction between the ballast and the filler through the design of the reinforcing bar and the wrapping body, effectively enhances the stability of the temporary slope, prevents sliding and collapse, provides erosion protection for the slope by the use of the geotextile, effectively prevents rainwater erosion and soil erosion, maintains the integrity of the slope, not only meets the temporary protection requirements during construction, but also can be used as part of the permanent structure, realizes the optimized use of resources, and reduces the overall construction cost.

[0017] The geogrid is embedded at the side slope, can be spread and layered reinforced during the widening of the new and old roadbeds, effectively enhances the connection between the new and old roadbeds, and improves the stability of the overall structure, compared with the traditional supporting structure such as the retaining wall, the protection structure reduces the material usage, reduces the environmental impact in the construction process, and meets the principle of sustainable development.

[0018] And the preset connecting piece and the matching groove are arranged, and the geogrid and the geotextile are laid, so that the construction steps are simplified, the construction progress is accelerated, and the construction difficulty is reduced, and meanwhile, in the construction process, the safe operation of the existing railway line is ensured through effective protection measures, and the influence and inconvenience to public transportation are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0019] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application, the illustrative embodiments of the present application and the description thereof are used to explain the present application, and do not constitute improper limitation to the present application. In the drawings:

[0020] Figure 1 It is a schematic diagram of the embankment and side slope combination structure of the present application;

[0021] Figure 2 It is a schematic diagram of the side slope and wrapping body combination structure of the present application;

[0022] Figure 3 It is a schematic diagram of the existing and newly built railway side slope combination structure of the present application;

[0023] Figure 4 It is a schematic diagram of the existing railway and side slope combination structure of the present application;

[0024] Figure 5 It is a schematic diagram of the side slope and newly built railway and existing railway combination structure of the present application;

[0025] Figure 6 It is a schematic diagram of the abandoned existing railway and newly built railway combination structure of the present application;

[0026] Figure 7 It is a schematic diagram of the frame body and wrapping body combination structure of the present application;

[0027] Figure 8 It is a schematic diagram of the sealing cover structure of the present application;

[0028] Figure 9 It is a schematic diagram of the wrapping bag structure of the present application.

[0029] In the drawings: 1, embankment; 2, side slope; 3, geogrid; 4, wrapping body; 5, frame body; 6, geotextile; 7, connecting piece; 8, reinforcing bar; 9, stitching rod; 10, railway one; 11, railway two; 12, railway three;

[0030] 41, wrapping bag; 42, filler;

[0031] 51, outer frame; 52, fitting groove; 53, sealing cover; 54, insertion hole;

[0032] 411, wrapping area; 412, woven tape. DETAILED DESCRIPTION

[0033] The following will disclose multiple embodiments of the present application with figures, and for the purpose of clear illustration, many details of the physical objects will be described in the following description. However, it should be understood that these details of the physical objects should not be used to limit the present application. That is, in some embodiments of the present application, these details of the physical objects are unnecessary. In addition, for the purpose of simplifying the figures, some conventional structures and components will be drawn in a simple schematic manner in the figures.

[0034] In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it. When the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist and is not within the protection scope required by the present application.

[0035] Please refer to Figures 1-9 With the continuous densification of high-speed railway network, it is often necessary to parallel or merge with existing lines, and the existing subgrade needs to be reconstructed. In the construction process, the distance between the newly built line and the existing line is very close, but the existing line cannot be shut down. Therefore, appropriate technical measures need to be taken to ensure the quality of the newly built line and the operation safety of the existing line. Therefore, the new filling slope 2 is generally steep, and the temporary slope 2 needs to be reinforced and protected during the filling process.

[0036] The slope 2 protection in the limited space is currently mainly supported and protected, but the retaining wall has problems such as high material consumption, high cost, and difficult to remove. If it is retained and buried in the roadbed body and transformed into a permanent project in the later period, there is also the risk of uneven stiffness, and when the subgrade is filled in steps, it is difficult to form a stable connection between the new and old subgrades. Based on this, the present application provides a permanent and temporary combined slope 2 protection structure, which comprises a slope 2 facing the space and a line arranged on the slope 2. A road embankment 1 for filling is arranged on one side of the slope 2, and a reinforcing structure is arranged on one side of the road embankment 1,

[0037] The reinforcing structure comprises a geogrid 3 laid on the road embankment 1 and a wrapping body 4 contained in the geogrid 3. The wrapping body 4 has one or more and is laid in sequence at a preset angle. The outer side of the wrapping body 4 is further covered with a layer of geotextile 6, which is spread flat along the free surface of the slope 2;

[0038] The top surface of the embankment 1 is also paved with tie bars 8. The tie bars 8 are one or more and overlapped at even intervals along the line direction. The force-bearing direction is laid perpendicular to the line direction and is fixed by fasteners after being laid flat.

[0039] In the construction of high-speed railways, in order to achieve safe connection between the new line and the existing line, a permanent and temporary combined slope protection structure is adopted. The goal is to ensure the stability of the new fill slope during the construction process, while taking into account the safety requirements of future permanent operations.

[0040] The specific implementation steps are as follows:

[0041] First, a reasonable slope and slope shape are designed for the open slope 2. A railway line is installed on the slope 2 to ensure safety during construction and operation.

[0042] On one side of slope 2, an embankment 1 area is planned for filling with new soil and materials to ensure that embankment 1 can be safely connected to the existing line.

[0043] Laying of reinforced structures

[0044] On one side of the embankment 1 , a reinforcement structure is laid, which mainly includes a geogrid 3 and an inclusion 4 .

[0045] The geogrid 3 is a high-strength polymer material, which is laid on the embankment 1 and can effectively disperse the stress of the soil and enhance the overall stability.

[0046] The inclusion 4 is the filling material in the geogrid 3 , and is usually made of high-strength and high-durability materials. There can be one or more inclusions 4 , and they are laid in sequence at a preset angle to enhance the overall strength and stability of the slope 2 .

[0047] Covering of geotextile 6

[0048] The outer side of the inclusion body 4 is covered with a layer of geotextile 6 , which is spread flat along the free surface of the slope 2 .

[0049] The function of the geotextile 6 is to prevent soil erosion and rainwater scouring, while increasing the overall stability of the slope 2 and preventing soil sliding.

[0050] On the side top surface of the embankment 1, the reinforcement 8 is laid. The reinforcement 8 can be single or multiple and overlapped at even intervals along the line direction.

[0051] The force direction of the reinforcement 8 should be perpendicular to the line direction. After laying flat, it should be fixed with fasteners to ensure that the reinforcement 8 can effectively share the stress of the soil and prevent the slope 2 from deforming.

[0052] The 8-fold fold length of the tie bar is generally not less than 1.5m, the overlap between widths is not less than 0.1m, and it is fixed to the fill soil with saddle nails or the like.

[0053] The permanent and temporary combined slope protection structure 2 is designed by the pre-set angle wrapping body 4 and the reinforcing bar 8, which simplifies the construction process and improves the construction efficiency. The combination of the geogrid 3 and the wrapping body 4 can effectively disperse the soil stress and enhance the overall stability of the slope 2 to prevent landslides and collapses.

[0054] Compared with the traditional retaining wall structure, the protection structure reduces material consumption and construction difficulty, thereby reducing the overall construction cost, ensuring the safety of the existing line during the construction process and the operation period, and reducing the risk of shutdown.

[0055] The structure realizes the combination of temporary construction and permanent operation, which not only meets the stability requirements during construction, but also ensures the safety of future operation.

[0056] The use of the geotextile 6 reduces soil erosion and rainwater erosion, reduces the negative impact on the environment, and meets the green construction concept of modern engineering.

[0057] One end of the reinforcing bar 8 extends to one side of the wrapping body 4 and is folded along the outside of the wrapping body 4 to wrap the wrapping body 4.

[0058] The wrapping body 4 includes a wrapping bag 41 and a filler 42 filled inside the wrapping bag 41. The outside of the wrapping bag 41 is also provided with a frame 5, and the frame 5 is in contact with the wrapping bag 41.

[0059] The frame 5 includes an outer frame 51, and the inside of the outer frame 51 is rough, which is in close contact with the outside of the wrapping bag 41.

[0060] The wrapping bag 41 includes a woven tape 412, which is woven into a wrapping area 411 that is adapted to the filler 42.

[0061] The top of the outer frame 51 is provided with a fitting groove 52, and a sealing cover 53 is installed at the fitting groove 52. The sealing cover 53 is arranged at the top of the wrapping body 4. The cover of the sealing cover 53 is provided with one or more plug-in holes 54, and a connecting piece 7 is installed at the plug-in hole 54 for connecting two outer frames 51.

[0062] One end of the reinforcing bar 8 extends to one side of the wrapping body 4 and is folded along the outside of the wrapping body 4 to form a wrapping of the wrapping body 4, which not only enhances the connection strength between the reinforcing bar 8 and the wrapping body 4, but also improves the stability of the overall structure.

[0063] The wrapping body 4 includes a wrapping bag 41 and a filler 42 filled inside the wrapping bag 41. The wrapping bag 41 is usually made of high-strength and corrosion-resistant materials, such as a woven tape 412.

[0064] The filler 42 can be sand, concrete or other high-strength materials for increasing the weight and stability of the package 4.

[0065] For example, the package 4 is filled with sand and gravel with a woven bag, and the width of the ballast is not less than 0.5m. The package 4 is firmly combined by self ballast, module connecting steel bars and plastic stitching rods 9 and pull bars 8. At this time, the temporary slope 2 slope surface formed by stacking the package 4 can be stacked according to the required slope ratio and height of the project.

[0066] The outer side of the package bag 41 is provided with a frame 5, which is in close contact with the package bag 41. The frame 5 includes an outer frame 51, the inner side of which is rough to increase the friction with the package bag 41 and prevent sliding.

[0067] The package bag 41 is made of woven tape 412, which is woven into a wrapping area 411 that is adapted to the filler 42 to ensure that the filler 42 is evenly distributed and tightly filled.

[0068] The top of the outer frame 51 is provided with a fitting groove 52, and the sealing cover 53 is installed at the fitting groove 52. The sealing cover 53 is arranged at the top of the package 4, and one or more insertion holes 54 are arranged at the cover body. The connecting piece 7 is installed at the insertion hole 54 for connecting two outer frames 51.

[0069] The connecting piece 7 connects two outer frames 51 together through the insertion hole 54, such as steel bars or bolts, to ensure the close connection between the packages 4 and prevent displacement and deformation.

[0070] The cladding design of the pull bar 8 and the close connection of the package 4 significantly enhance the overall stability of the slope 2 protection structure, preventing landslides and collapses.

[0071] Through the pre-set fitting groove 52 and connecting piece 7, the installation and connection process of the package 4 is simplified, and the construction efficiency is improved.

[0072] The use of high-strength and corrosion-resistant woven tape 412 and filler 42 reduces material consumption and maintenance costs, and reduces the overall construction cost.

[0073] Through reasonable design and construction, the safety of the existing line during construction and operation is ensured, the risk of shutdown is reduced, the combination of temporary construction and permanent operation is realized, the stability requirement during construction is met, and the safety of future operation is guaranteed.

[0074] One end of the geogrid 3 near the package 4 is bent at a pre-set angle in an arc shape, and the bending part is provided with a stitching rod 9.

[0075] One end of the geotextile 6 extends to the toe of the slope 2 and is overlaid on one side of the slope 2 by the fixing piece.

[0076] The lines include a first railway 10, a second railway 11, and a third railway 12, which is an existing railway.

[0077] One end of the geogrid 3 is close to the wrapping body 4, and is arc-bent at a preset angle, which increases the contact area between the geogrid 3 and the wrapping body 4 and enhances the connection strength therebetween. The bending part is provided with a stitching rod 9 for fixing the arc-bent part of the geogrid 3, so as to ensure the stability and tensile strength of the shape.

[0078] One end of the geotextile 6 extends to the toe of the slope 2, so as to ensure the protection coverage of the entire slope 2.

[0079] The geotextile 6 is pressed on one side of the slope 2 by a fixing member, such as a horse nail or a heavy weight, so as to prevent the slope surface from being directly washed by rainwater, reduce water and soil loss and water infiltration, and reduce the risk of slope instability.

[0080] When the temporary slope 2 needs to be further widened and filled, the geotextile 6 covering the slope surface can be removed, the widened embankment 1 is filled in layers, one end of the free-hanging geogrid 3 is laid flat in the corresponding widened filling soil layer, and the other end of the geogrid 3 is embedded and fixed in the soil in the temporary slope 2, which can effectively improve the connection integrity between the new and old filling embankments 1.

[0081] The operation of the third railway 12 cannot be interrupted, so special attention should be paid to its safety during construction. The first railway 10 and the second railway 11 are new lines, and their construction and operation should be coordinated with the existing third railway 12 to ensure the safety and smoothness of the overall railway network.

[0082] The arc-bending design of the geogrid 3 and the full coverage of the geotextile 6 significantly enhance the overall stability of the slope 2 protection structure, preventing landslides and landslides.

[0083] Through the preset arc-bending and the stitching rod 9, the installation process of the geogrid 3 is simplified, and the construction efficiency is improved.

[0084] The specific working principle is as follows:

[0085] After the slope 2 site is leveled and compacted, the first layer of reinforcing bars 8 is laid and fixed, the wrapping body 4 is placed on the side of the reinforcing bars 8 close to the temporary slope 2, the wrapping body 4 is wrapped back by the folded reinforcing bars 8, and the folded end of the reinforcing bars 8 is fixed by the stitching rod 9, the filler is filled in layers on the geogrid 3 and the reinforcing bars 8, and is rolled and compacted to make the top of the filler flush with the top of the first layer of wrapping body 4, the embedded geogrid 3 is laid above the wrapping body 4, the above steps are repeated to lay and fix the second layer of reinforcing bars 8, and the wrapping bodies 4 of the upper and lower layers are connected by the module connecting steel bars, the embedded geogrid 3 is fixed at the same time when the folded end of the reinforcing bars 8 is fixed by the stitching rod 9, and the other end of the embedded geogrid 3 is freely suspended on the slope surface. The above steps are repeated until the top of the slope is reached. A layer of geotextile 6 is added on the embedded geogrid 3 at the top of the slope, the geotextile 6 covers from the top of the slope to the foot of the slope, and is fixed to the ground by using horse nails at the foot of the slope or is covered by using heavy objects.

[0086] When the roadbed is widened in steps, the geotextile 6 is removed, and when the roadbed is filled in layers, the embedded geogrid 3 is laid and stretched in layers to strengthen the connection between the widened roadbed and the temporary slope 2.

[0087] The above only describes the embodiments of the present application and is not used to limit the present application. The present application can have various changes and variations for those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application should be included in the scope of the claims of the present application.

Claims

1. A permanent and temporary combined slope protection structure, comprising a slope (2) facing an open space and a line arranged on the slope (2); an embankment (1) for filling is arranged on one side of the slope (2); and a reinforcement structure is arranged on one side of the embankment (1); Its characteristics are: The reinforcement structure comprises a geogrid (3) laid on the embankment (1) and an inclusion (4) included in the geogrid (3), wherein the inclusion (4) is provided in one or more pieces and is laid in sequence at a preset angle, and the outer side of the inclusion (4) is also covered with a layer of geotextile (6), and the geotextile (6) is spread flat along the free surface of the slope (2); The top surface of the embankment (1) is also paved with tie bars (8), wherein the tie bars (8) are one or more and overlapped at even intervals along the line direction, and the force-bearing direction thereof is paved along the perpendicular line direction, and is fixed by fasteners after being paved flat; The wrapping body (4) comprises a wrapping bag (41) and a filler (42) filled into the inner side of the wrapping bag (41); a frame (5) is further provided on the outer side of the wrapping bag (41); the frame (5) is in contact with the wrapping bag (41); The frame (5) includes an outer frame (51), the inner side of the outer frame (51) is roughened and fits the outer side of the wrapping bag (41); The top of the outer frame (51) is provided with a fitting groove (52), a sealing cover (53) is installed at the fitting groove (52), the sealing cover (53) is arranged on the top of the enclosing body (4), one or more plug holes (54) are provided at the cover body of the sealing cover (53), and a connecting piece (7) is installed at the plug hole (54) for connecting the two outer frames (51).

2. The permanent and temporary combined slope protection structure according to claim 1 is characterized in that: One end of the tie rod (8) extends to one side of the inclusion body (4) and is folded back along the outer side of the inclusion body (4) to cover the inclusion body (4).

3. The permanent and temporary combined slope protection structure according to claim 1 is characterized in that: The wrapping bag (41) comprises a woven belt (412), wherein the woven belt (412) is woven into a wrapping area (411), and the wrapping area (411) is adapted to the filler (42).

4. The permanent and temporary combined slope protection structure according to claim 1 is characterized in that: One end of the geogrid (3) is bent in an arc shape at a preset angle near the inclusion body (4), and a suture rod (9) is provided at the bent portion.

5. The permanent and temporary combined slope protection structure according to claim 1 is characterized in that: One end of the geotextile (6) extends to the foot of the slope (2) and is pressed against one side of the slope (2) through a fixing member.

6. The permanent and temporary combined slope protection structure according to claim 1 is characterized in that: The lines include Railway 1 (10), Railway 2 (11) and Railway 3 (12), and Railway 3 (12) is an existing railway.

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