Composite reinforced earth retaining wall suitable for high-speed railway embankment

Abstract

The utility model discloses a composite reinforced earth retaining wall suitable for a high-speed railway embankment, which comprises a foundation bed surface layer, a foundation bed bottom layer and an embankment body below the foundation bed bottom layer, two sides of the foundation bed bottom layer are filled with first soil bodies, and two sides of the embankment body below the foundation bed bottom layer are filled with second soil bodies. A filler wrapping body and a gravel wrapping body are arranged on the outer side of the first soil body and the outer side of the second soil body, a cast-in-place concrete face plate is arranged outside the gravel wrapping body, an integral face plate and a foundation bed bottom layer are arranged outside the cast-in-place concrete face plate, and geotechnical material tie bars are arranged in the portion, below the foundation bed bottom layer, of the embankment body. The geotechnical material tie bars comprise full-length geotechnical material tie bars and symmetrical geotechnical material tie bars. The full-length geotechnical material tie bars are arranged in the foundation bed bottom layer, and the symmetrical geotechnical material tie bars are arranged in the embankment body below the foundation bed bottom layer. The composite reinforced earth retaining wall has the advantages of being high in strength, large in rigidity, small in occupied area, convenient to construct, environmentally friendly and the like, post-construction settlement can be better controlled, and later operation and maintenance are facilitated.

Description

Technical Field

[0001] The utility model belongs to the field of railway roadbed structure construction, and in particular relates to a composite reinforced soil retaining wall suitable for high-speed railway embankments. Background Art

[0002] The traditional reinforced earth retaining wall is an integral composite structure composed of fill, reinforcement and panel. As a flexible retaining structure, it is favored by a large number of engineering and technical personnel for its advantages such as simple construction, wide applicability and good seismic performance. Since the reinforcement technology was introduced into my country in the 1970s, it has been widely used in many engineering fields, but it has not yet been used on the main line of high-speed railways. This is mainly because the traditional reinforced earth retaining wall has no obvious effect on controlling the deformation of roadbed fillers, and the reinforcement material often requires a certain strain to reflect its tensile effect.

[0003] However, the allowable range of subgrade deformation for high-speed railways is at the millimeter level, which places more stringent requirements on reinforced earth retaining walls.

[0004] In view of this, it is urgent to propose a new type of composite reinforced earth embankment retaining wall to simultaneously solve the needs of embankment stability and deformation. Summary of the invention

[0005] The utility model is proposed to solve the problems existing in the prior art, and its purpose is to provide a composite reinforced soil retaining wall suitable for high-speed railway embankments.

[0006] The technical solution of the utility model is: a composite reinforced earth retaining wall suitable for high-speed railway embankments, comprising a base surface layer, a base bottom layer, and an embankment body below the base bottom layer, both sides of the base bottom layer are filled with a first soil body, and both sides of the embankment body below the base bottom layer are filled with a second soil body, filler inclusions are arranged outside the first soil body and the second soil body, a crushed stone inclusion is arranged outside the filler inclusion, a cast-in-place concrete panel is arranged outside the crushed stone inclusion, and an integral panel is arranged outside the cast-in-place concrete panel.

[0007] Furthermore, geotechnical reinforcement bars are arranged in the subgrade bottom layer and the embankment body below the subgrade bottom layer, and the geotechnical reinforcement bars include full-length geotechnical reinforcement bars and symmetrical geotechnical reinforcement bars.

[0008] Furthermore, the full-length geotechnical material reinforcement is arranged in the base layer, and the full-length geotechnical material reinforcement is arranged transversely and full-length.

[0009] Furthermore, the symmetrical geotechnical material reinforcement is arranged in the embankment body below the base bed bottom layer, and the symmetrical geotechnical material reinforcement is laterally symmetrical along the embankment body below the base bed bottom layer.

[0010] Furthermore, one end of the geotechnical material reinforcement is wound around the crushed stone inclusion body and the filler inclusion body and folded back.

[0011] Furthermore, the folded section and the main section of the geotechnical material reinforcement are fixed by a high-density polyethylene connecting rod.

[0012] Furthermore, prestressed steel tendons are provided in the base bed bottom layer and the embankment body below the base bed bottom layer, and the prestressed steel tendons are prestressed.

[0013] Furthermore, the lower end of the integral panel is connected to a strip foundation, and the strip foundation is arranged on a gravel cushion layer.

[0014] Furthermore, a slope protection platform is arranged outside the strip foundation, and the slope protection platform protects the slope foot.

[0015] The beneficial effects of the utility model are as follows:

[0016] The composite reinforced earth retaining wall of the present invention has the advantages of high strength, high rigidity, small footprint, convenient construction and green environmental protection. At the same time, the structure is more conducive to controlling post-construction settlement and is convenient for subsequent operation and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a cross-sectional schematic diagram of the utility model;

[0018] Figure 2 It is a schematic diagram of the structure of the filler inclusion in the utility model;

[0019] Figure 3 This is a schematic diagram of the connection of the high-density polyethylene connecting rod in the utility model;

[0020] Figure 4 It is a structural schematic diagram of the integral panel in the utility model;

[0021] in:

[0022] 1 Surface layer of base bed 2 Bottom layer of base bed

[0023] 3Embankment body below the base bed 4Geotechnical material reinforcement

[0024] 5 Prestressed steel reinforcement 6 Integral panel

[0025] 7 Slope protection platform 8 Gravel cushion

[0026] 9 Cast-in-place concrete panel 10 First soil

[0027] 11 Gravel inclusions 12 Filler inclusions

[0028] 13 Second soil body 14 PVC drainage pipe

[0029] 15 Waterproof layer 16 Strip foundation

[0030] 17 Concrete leveling layer 18 Backfill compacted soil

[0031] 19 High-density polyethylene connecting rod 20 Drainage ditch

[0032] 21 Railing 22 Sluice hole

[0033] 23 Reserve holes for steel reinforcement connection. DETAILED DESCRIPTION

[0034] Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and embodiments:

[0035] like Figures 1 to 4 As shown, a composite reinforced earth retaining wall suitable for high-speed railway embankments includes a subgrade surface layer 1, a subgrade bottom layer 2, and an embankment body 3 below the subgrade bottom layer, wherein both sides of the subgrade bottom layer 2 are filled with a first soil body 10, and both sides of the embankment body 3 below the subgrade bottom layer are filled with a second soil body 13, a filler inclusion 12 is arranged outside the first soil body 10 and the second soil body 13, a crushed stone inclusion 11 is arranged outside the filler inclusion 12, a cast-in-place concrete panel 9 is arranged outside the crushed stone inclusion 11, and an integral panel 6 is arranged outside the cast-in-place concrete panel 9.

[0036] Geotechnical material reinforcement 4 is arranged in the subgrade bottom layer 2 and the embankment body 3 below the subgrade bottom layer. The geotechnical material reinforcement 4 includes full-length geotechnical material reinforcement and symmetrical geotechnical material reinforcement.

[0037] The through-length geotechnical material reinforcement is arranged in the base bed bottom layer 2, and the through-length geotechnical material reinforcement is arranged transversely and through-length.

[0038] The symmetrical geotechnical material reinforcement is arranged in the embankment body 3 below the base bed bottom layer, and the symmetrical geotechnical material reinforcement is laterally symmetrical along the embankment body 3 below the base bed bottom layer.

[0039] One end of the geotechnical material reinforcement 4 is wound around the crushed stone inclusion body 11 and the filler inclusion body 12 and folded back.

[0040] The folded section and the main section of the geotechnical material reinforcement 4 are fixed by a high-density polyethylene connecting rod 19 .

[0041] Prestressed steel tendons 5 are provided in the subgrade bottom layer 2 and the embankment body 3 below the subgrade bottom layer, and the prestressed steel tendons 5 are prestressed.

[0042] The lower end of the integral panel 6 is connected to a strip foundation 16 , and the strip foundation 16 is arranged on the gravel cushion layer 8 .

[0043] A slope protection platform 7 is arranged outside the strip foundation 16, and the slope protection platform 7 protects the slope foot.

[0044] Specifically, the subgrade surface layer 1 is made of 0.4 m thick graded crushed stone, the subgrade bottom layer 2 is made of soil groups A and B, and the embankment body 3 below the subgrade bottom layer is made of soil groups A, B, C1, and C2.

[0045] Specifically, the first soil body 10 is soil of groups A and B mixed with 5% cement, and the second soil body 13 is soil of groups A, B, C1, and C2 mixed with 5% cement. The first soil body 10 and the second soil body 13 are arranged within 2m of the integral panel 6.

[0046] Specifically, the base surface layer 1, the base bottom layer 2, the embankment body 3 below the base bottom layer, the first soil body 10, the second soil body 13, the geotechnical material reinforcement 4, the prestressed steel reinforcement 5, the cast-in-place concrete panel 9, and the integral panel 6 constitute the main body of the embankment.

[0047] Specifically, the geotechnical reinforcement 4 is arranged at equal intervals, the vertical spacing of the geotechnical reinforcement 4 is 0.3m, the geotechnical reinforcement 4 is arranged throughout the subgrade bottom layer 2, and is symmetrically arranged within the embankment body 3 below the subgrade bottom layer, with a length of 7m; the folding length of the geotechnical reinforcement 4 is not less than 2.0m, and is connected using high-density polyethylene connecting rods 19.

[0048] Specifically, the prestressed steel reinforcement 5 is arranged along the entire length of the cross section, and the prestressed steel reinforcement 5 is pre-buried during the roadbed filling process, and prestressing is performed after the complete integrated panel 6 and the cast-in-place concrete panel 9 are installed.

[0049] Specifically, the integral panel 6 adopts a prefabricated reinforced concrete panel. The integral panel 6 can be used as a template for a cast-in-place concrete panel 9. The integral panel 6 is reliably connected to the strip foundation 16 below.

[0050] Specifically, a crushed stone inclusion body 11 and a filler inclusion body 12 are arranged behind the cast-in-place concrete panel 9, and the crushed stone inclusion body 12 adopts a bagged sand and pebble filter layer.

[0051] Specifically, the strip foundation 16 is made of plain concrete, a 0.1m thick concrete leveling layer 18 and a 0.2m thick gravel cushion layer 8 are arranged below the strip foundation 16, compacted soil 18 is backfilled within the excavation range, and expansion joints are arranged along the line direction.

[0052] Specifically, a slope protection platform 7 is arranged above the strip foundation 16, the width of the slope protection platform 7 is 1.5m, and the slope protection ratio is 1:1.5. A PVC drainage pipe 14 is arranged along the line direction 1m above the berm, and a waterproof layer 15 is arranged below the PVC drainage pipe 14.

[0053] Specifically, a drainage ditch 20 is arranged at the foot of the slope of the base bed surface layer 1 along the longitudinal direction of the line.

[0054] Specifically, a handrail 21 is provided at the top of the wall behind the cast-in-place concrete panel 9 .

[0055] Specifically, the integral panel 6 and the cast-in-place concrete panel 9 are arranged to be inclined inwards.

[0056] Specifically, a protrusion is formed at the upper end of the strip foundation 16 to horizontally limit the lower end of the integral panel 6 , thereby limiting the lateral freedom of the lower end of the inclined integral panel 6 .

[0057] The composite reinforced earth retaining wall of the present invention has the advantages of high strength, high rigidity, small footprint, convenient construction and green environmental protection. At the same time, the structure is more conducive to controlling post-construction settlement and is convenient for subsequent operation and maintenance.

Claims

1. A composite reinforced earth retaining wall suitable for high-speed railway embankments, comprising a subgrade surface layer (1), a subgrade bottom layer (2), and an embankment body (3) below the subgrade bottom layer, characterized in that: The base bed bottom layer (2) is filled with a first soil body (10) on both sides, and the embankment body (3) below the base bed bottom layer is filled with a second soil body (13) on both sides, a filler inclusion body (12) is arranged outside the first soil body (10) and the second soil body (13), a crushed stone inclusion body (11) is arranged outside the filler inclusion body (12), a cast-in-place concrete panel (9) is arranged outside the crushed stone inclusion body (11), and an integral panel (6) is arranged outside the cast-in-place concrete panel (9).

2. The composite reinforced earth retaining wall suitable for high-speed railway embankment according to claim 1 is characterized in that: Geotechnical material reinforcement bars (4) are arranged in the base bed bottom layer (2) and the embankment body (3) below the base bed bottom layer. The geotechnical material reinforcement bars (4) include full-length geotechnical material reinforcement bars and symmetrical geotechnical material reinforcement bars.

3. The composite reinforced earth retaining wall suitable for high-speed railway embankment according to claim 2 is characterized in that: The full-length geotechnical material reinforcement bars are arranged in the base bed bottom layer (2), and the full-length geotechnical material reinforcement bars are arranged transversely and full-length.

4. The composite reinforced earth retaining wall suitable for high-speed railway embankment according to claim 2 is characterized in that: The symmetrical geotechnical material reinforcement bars are arranged in the embankment body (3) below the base bed bottom layer, and the symmetrical geotechnical material reinforcement bars are laterally symmetrical along the embankment body (3) below the base bed bottom layer.

5. The composite reinforced earth retaining wall suitable for high-speed railway embankment according to claim 2 is characterized in that: One end of the geotechnical material reinforcement (4) is wound around the crushed stone inclusion body (11) and the filler inclusion body (12) and folded back.

6. The composite reinforced earth retaining wall suitable for high-speed railway embankment according to claim 5, characterized in that: The folded section and the main body section of the geotechnical material reinforcement (4) are fixed via a high-density polyethylene connecting rod (19).

7. The composite reinforced earth retaining wall suitable for high-speed railway embankment according to claim 2 is characterized in that: Prestressed steel tendons (5) are provided in the base bed bottom layer (2) and the embankment body (3) below the base bed bottom layer, and the prestressed steel tendons (5) are prestressed.

8. The composite reinforced earth retaining wall suitable for high-speed railway embankment according to claim 1, characterized in that: The lower end of the integral panel (6) is connected to a strip foundation (16), and the strip foundation (16) is arranged on a crushed stone cushion layer (8).

9. The composite reinforced earth retaining wall suitable for high-speed railway embankment according to claim 8, characterized in that: A slope protection platform (7) is arranged outside the strip foundation (16), and the slope protection platform (7) protects the slope foot.

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