CN111456036A

CN111456036A - Compound cutting slope support reinforced structure

Info

Publication number: CN111456036A
Application number: CN201910051977.9A
Authority: CN
Inventors: 何忠明; 向达; 邱俊筠; 黄科
Original assignee: Changsha University of Science and Technology
Current assignee: Changsha University of Science and Technology
Priority date: 2019-01-21
Filing date: 2019-01-21
Publication date: 2020-07-28

Abstract

The invention discloses a composite type cutting slope supporting and reinforcing structure which comprises a constant weight retaining wall (1), a road surface drainage ditch (2), a daub water-proof layer (3), a water drain pipe (4), a plastic drainage plate (5), a water interception ditch (6), a prestressed anchor cable (7), a slope lattice (8), a road surface (9), a slope surface (10) and a potential sliding surface (11). The invention adopts the scheme of combining the prestressed anchor cables and the balance weight type retaining wall, the prestressed anchor cables are driven into a slope body at the intersection of the slope lattice and pass through a potential sliding surface, the balance weight type retaining wall is arranged at the slope bottom of a cutting slope, a water drain pipe is arranged in the wall body, and a plastic water drain plate is adopted for draining water at the wall back. The invention improves the integral stability of the side slope and solves the stability problem of the potential sliding surface of the cutting side slope; wall back of the body plastics drain bar drainage is rapid, and difficult siltation more can reduce disease and incident, and extension retaining wall life-span, and then improve the stability of high cutting side slope.

Description

Compound cutting slope support reinforced structure

Technical Field

The invention relates to the field of road engineering in civil engineering, in particular to a composite type cutting slope support reinforcing structure.

Background

In the using process of the highway, diseases such as subsidence, scouring and the like often occur on a high cutting slope due to passing through an area with poor engineering geology or an area with bad natural weather, and the slope collapse accident can be caused in serious conditions, so that traffic interruption is caused. At this moment people can take side slope support reinforced structure to consolidate the cutting side slope usually, and traditional friction pile is strutted or retaining wall is strutted and can only be used for cutting side slope bottom of a slope fender, can't solve the stability problem of cutting side slope shallow layer spalling and the potential glide plane of cutting side slope. Meanwhile, in the aspect of drainage behind the retaining wall, the traditional gravel reverse filter layer retaining wall drainage has a series of problems that the construction quality is difficult to control, the drainage is not smooth, a drainage hole is easy to freeze and block, and the like.

Disclosure of Invention

Aiming at the problems, the invention discloses a composite cutting slope support reinforcing structure which comprises the following components in parts by weight: the method comprises the following steps: the system comprises a balance weight type retaining wall, a pavement drainage ditch, a cement mortar waterproof layer, a water drain pipe, a plastic drainage plate, a water intercepting ditch, a prestressed anchor cable, a slope lattice, a road pavement, a side slope and a potential sliding surface; wherein, domatic lattice fix on the slope is domatic, the prestressed anchorage cable squeeze into inside the slope body at domatic lattice intersection, pass potential glide plane, the catch basin set up on cutting side slope sloping bottom surface, the weighing type retaining wall lay at cutting side slope sloping bottom, the outlet pipe lay in weighing type retaining wall, its end exposes in the road surface escape canal between road surface and the retaining wall, plastics drain bar lay at the wall back of the body of weighing type retaining wall, its upper end to side slope surface, lower extreme to bottom outlet, the cement water barrier lay in the plastics drain bar bottom of weighing type retaining wall back of the body.

2. A compound cutting side slope support reinforced structure, characterized in that, domatic lattice (8) adopt reinforced concrete lattice, adopt C25 concrete, HRB335 level deformed steel bar.

3. The compound cutting slope support reinforced structure is characterized in that the prestressed anchor cable (7)Adopts 1 × 7 standard type, diameter 15.2mm, nominal tensile strength 1860MPa, cross-sectional area 139mm²The steel strand, steel strand surface layer zinc-plating is anticorrosive, and anchor rope length and design inclination are according to the stability decision of cutting side slope.

4. A compound cutting side slope support reinforced structure, its characterized in that, catch ditch (6) and road surface escape canal (2) adopt C45 cement concrete placement, the degree of depth is 350 mm.

5. The compound type cutting slope support reinforcing structure is characterized in that the constant weight type retaining wall (1) is of a cast-in-place concrete structure.

6. The compound cutting slope support reinforced structure is characterized in that the drain pipe (4) is a PVC pipe with the diameter of 50mm and the thickness of 5 mm.

7. A compound cutting slope support reinforced structure, its characterized in that, the thick of board of plastics drain bar (5) be 70 mm.

8. A compound cutting side slope support reinforced structure, its characterized in that, the cement mortar water barrier (3) thickness be 300mm, the width is 150 mm.

The invention has the beneficial effects that: the invention adopts the scheme of combining the prestressed anchor cables and the balance weight type retaining wall, effectively improves the overall stability of the side slope, simultaneously prevents the shallow layer of the cutting side slope from being cracked, and solves the stability problem of the potential sliding surface of the cutting side slope; and adopt the drainage of plastics drain bar at the wall back of the wall of weighing apparatus formula retaining wall, compare in the construction quality that traditional gravel reversed filter layer retaining wall drainage exists difficult to control, the drainage is not smooth, the outlet freezes easily and fills in the scheduling problem, this type of problem can be solved effectively in wall back of the body plastics drain bar drainage, and the drainage rapidly, and difficult siltation more can reduce disease and incident, extension retaining wall life-span, and then improve the stability of high cutting side slope.

Drawings

Fig. 1 is a schematic structural view of a composite cutting slope support reinforcing structure of the invention.

Labeled as: 1. the road surface drainage ditch comprises a weight-balancing type retaining wall, 2 road surface drainage ditches, 3 cement water-resisting layers, 4 drainage pipes, 5 plastic drainage plates, 6 water-resisting ditches, 7 prestressed anchor cables, 8 slope lattices, 9 road surfaces, 10 slope slopes and 11 potential sliding surfaces.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

As shown in fig. 1, the composite type cutting slope supporting and reinforcing structure comprises a constant weight retaining wall (1), a road drainage ditch (2), a daub water-proof layer (3), a water drain pipe (4), a plastic drainage plate (5), a water interception ditch (6), a prestressed anchor cable (7), a slope lattice (8), a road pavement (9), a slope surface (10) and a potential sliding surface (11); wherein domatic lattice (8) are fixed on slope domatic (10) of side slope, and inside the slope body was squeezed into at domatic lattice (8) intersection to prestressed anchorage cable (7), passed potential glide plane (11), cut-off ditch (6) set up at cutting side slope bottom of slope surface, cutting side slope bottom of slope is laid in weighing type retaining wall (1), and water-release pipe (4) are laid in weighing type retaining wall (1), and its end exposes in road surface escape canal (2) between road surface (9) and weighing type retaining wall (1), and plastics drain bar (5) are laid in the wall back of weighing type retaining wall (1), its upper end to side slope surface, lower extreme to bottom outlet, plastic drain bar (5) bottom at weighing type retaining wall (1) wall back is laid in cement water-stop (3).

1. And determining the positions of the balance weight type retaining wall (1) and the prestressed anchor cable (7) according to the measurement paying-off.

2. Construction weighing type retaining wall (1) adopts cast-in-place concrete structure to lay wash-out pipe (4) in weighing type retaining wall (1), wash-out pipe (4) end expose in road surface escape canal (2) between road surface (9) and weighing type retaining wall (1), vertical and horizontal interval of wash-out pipe (4) be 2m, the escape canal adopt No. C45 cement concrete placement, the degree of depth is 350 mm.

3. The method is characterized in that a plastic drainage plate (5) with the thickness of 70mm is arranged behind the balance weight type retaining wall (1), a cement waterproof layer (3) is arranged at the bottom end of the plastic drainage plate (5), the cement waterproof layer (3) is 300mm in thickness and 150mm in width.

4. When the retaining wall is poured, a slope lattice (8) and a prestressed anchor cable (7) are constructed on a side slope (10), the slope lattice (8) adopts a reinforced concrete lattice, C25 concrete and HRB 335-grade deformed steel bar, and the prestressed anchor cable (7) adopts a 1 × 7 standard type, the diameter of the prestressed anchor cable is 15.2mm, the nominal tensile strength of the prestressed anchor cable is 1860MPa, and the sectional area of the prestressed anchor cable is 139mm²The steel strand, the steel strand surface layer is galvanized and anticorrosive, and exert prestressing force to prestressed anchorage cable (7).

5. And (3) excavating a catch drain (6) on the slope surface (10) at a distance of 1m from the top end of the plastic drainage plate (5), wherein the catch drain (6) is cast by C45 cement concrete and the depth is 350 mm.

Claims

1. The utility model provides a compound cutting slope support reinforced structure, includes: the device comprises a balance weight type retaining wall (1), a pavement drainage ditch (2), a cement waterproof layer (3), a water drain pipe (4), a plastic drainage plate (5), a water interception ditch (6), a prestressed anchor cable (7), a slope lattice (8), a road pavement (9), a slope surface (10) and a potential sliding surface (11); the method is characterized in that: domatic lattice (8) fix on slope domatic (10) of side slope, prestressed anchorage cable (7) squeeze into the slope body inside domatic lattice (8) intersection, pass potential glide plane (11), cut-off ditch (6) set up at cutting side slope bottom of slope surface, weighing type retaining wall (1) lay at cutting side slope bottom of slope, outlet pipe (4) lay in weighing type retaining wall (1), its end exposes in road surface escape canal (2) between road surface (9) and weighing type retaining wall (1), plastics drain bar (5) lay at the back of the wall of weighing type retaining wall (1), its upper end to side slope surface, lower extreme to bottom outlet, cement waterproof layer (3) lay at the plastics drain bar (5) bottom of weighing type retaining wall (1) back of the wall.

2. A composite cutting slope support reinforced structure according to claim 1, characterized in that the slope lattice (8) is reinforced concrete lattice, C25 concrete, HRB335 threaded steel.

3. The compound type cutting slope support reinforcing structure of claim 1, wherein the prestressed anchor cable (7) adopts 1 × 7 standard type, diameter 15.2mm, nominal tensile strength 1860MPa, and cross-sectional area 139mm²The steel strand, steel strand surface layer zinc-plating is anticorrosive, and anchor rope length and design inclination are according to the stability decision of cutting side slope.

4. A composite cutting slope supporting and reinforcing structure as claimed in claim 1, wherein the intercepting drain (6) and the road surface drainage drain (2) are cast by cement concrete No. C45 with the depth of 350 mm.

5. A composite cutting slope support reinforced structure according to claim 1, characterized in that the said constant weight retaining wall (1) is made of cast-in-place concrete.

6. A composite cutting slope supporting and reinforcing structure according to claim 1, wherein the drain pipe (4) is a PVC pipe with a diameter of 50mm and a thickness of 5 mm.

7. A composite cutting slope support reinforced structure according to claim 1, wherein the thickness of the plastic drainage plate (5) is 70 mm.

8. A composite cutting slope support reinforced structure according to claim 1, wherein the thickness of the daub water barrier (3) is 300mm, and the width is 150 mm.