CN107700527A - Add the cantilever retaining wall and construction method of pilaster and anchor pole - Google Patents

Abstract

A cantilever retaining wall with a pilaster and an anchor rod and its construction method, the anchor rod (4) is composed of an anchor segment (9) and a free segment (11), and the anchor rod (4) passes through the anchor (10) and the pilaster ( 5) Fixed connection. The steps of the method are: (1) setting out and positioning, using a measuring instrument to locate the position of the wall heel plate (3) of the retaining wall; (2) constructing the wall heel plate (3) and the wall toe plate (2): formwork and then Pouring concrete to form the bottom slab of the cantilever retaining wall; (3) construction wall body (1); (4) construction pilaster (5): reserve holes at the positions where anchor rods (4) are designed to be added, and then pour concrete to form Wall column (5); (5) construction anchor rod (4): drill a hole in the slope body, place the anchor rod (4) in the drill hole, and inject anchor slurry to form the anchor segment (9) and the free segment ( 11); (6) Fix the anchor rod (4): connect the anchor rod (4) to the pilaster (5) fixedly.

Description

Cantilever retaining wall with pilasters and anchor rods and its construction method

technical field

The invention relates to the construction technology of retaining walls and belongs to the field of geotechnical engineering.

Background technique

In the construction of modern foundation engineering, more and more slope projects needing support are encountered. The cantilever retaining wall is widely used because of its simple structure, convenient construction, and ability to adapt to soft ground. The general form of cantilever retaining wall is composed of wall toe plate, wall heel plate and wall body plate, mainly relying on the self-weight of the fill on the bottom plate to resist the soil pressure of the slope and maintain the stability of the slope. Therefore, when the slope height is high, the bending moment at the lower end of the wall panel is large, and the stability of the retaining wall is poor, which seriously limits the application range of the cantilever retaining wall. In the present invention, by adding anchor rods at the designed positions of the wall panels of the cantilever retaining wall, the cantilever retaining wall and the anchor rods jointly bear the upper load and the earth pressure behind the wall, and a pilaster is set at the wall body where the anchor rods are applied , to avoid stress concentration on the wall panel. This not only further ensures the stability of the supporting slope, but also expands the application range of the cantilever retaining wall.

In actual engineering, most of the encountered slope heights are undulating. The general cantilever retaining wall is suitable for slopes of 6m to 9m. When the height of the slope is too high, there will be certain safety problems in choosing the general form of cantilever retaining wall. At this time, the stability of the slope can be ensured by adding one or more rows of anchor rods at the design positions of the wall panels. If the anchor rod is directly fixed to the wall panel with an anchor, stress concentration will occur at the anchor rod, which will lead to early failure of the wall panel due to stress concentration. Therefore, by adding a pilaster at the place where the anchor is designed, the anchor can be fixed on the added pilaster with an anchor, so that the problem of stress concentration can be solved. The cantilever retaining wall with pilasters and anchors not only has the characteristics of simple structure, convenient construction, and economical rationality of general cantilever retaining walls, but also can be used to support high slopes. be more widely applied.

Contents of the invention

The object of the present invention is to provide a cantilever retaining wall with wall columns and anchor rods and its construction method.

The invention relates to a cantilever retaining wall with a wall column and an anchor rod and a construction method thereof. The cantilever retaining wall with a wall column and an anchor rod includes a wall body board 1, a wall toe board 2, a wall heel board 3, and an anchor rod 4 , pilaster 5, drain hole 6, anchor rod 4 is composed of anchor segment 9 and free segment 11, anchor rod 4 is fixedly connected with pilaster 5 through anchorage 10.

The construction method of the cantilever retaining wall with pilasters and anchor rods, the construction steps are:

(1) Setting out and positioning: Firstly, use measuring instruments to set out the lines according to the engineering design drawings, and then level the site, and use measuring instruments to locate the position of the wall heel plate 3 of the retaining wall;

(2) Construction of the wall heel plate 3 and the wall toe plate 2: set up the formwork at the determined construction position according to the design dimensions of the wall heel plate 3 and the wall toe plate 2, and then pour concrete to form the bottom plate of the cantilever retaining wall;

(3) Construction wall panel 1: According to the design requirements, set up the formwork at the design position of the wall panel, and reserve a hole at the position of the designed anchor rod 4, and then pour concrete to form the wall panel 1;

(4) Construction of the pilaster 5: Determine the position of the pilaster 5 according to the horizontal spacing of the anchor rod 4, then set up the formwork at the position where the pilaster 5 needs to be installed, and reserve a hole at the position where the anchor rod 4 is designed to be placed, and then Pouring concrete to form pilasters 5;

(5) Construction anchor 4: according to the design length and inclination angle of the anchor 4, drill holes in the slope body, place the anchor 4 in the drill hole, and inject anchor slurry to form the anchor section 9 and the free section 11;

(6) Fix the anchor rod 4: use the anchor 10 to fix the anchor rod 4 and the pilaster 5;

(7) Repeat the above steps to construct the next adjacent cantilever retaining wall.

Beneficial effects of the invention: the cantilever retaining wall is convenient in construction and simple in structure, and can adapt to foundations with low bearing capacity. The wall height is generally 6m to 9m, and it is widely used in slope support. But when the slope height is large, the bending moment at the lower part of the wall panel 1 is large, and the consumption of concrete and steel increases sharply, which affects its economic benefits. However, the present invention makes the retaining wall and the anchor rod 4 jointly bear the upper load and the earth pressure behind the wall by adding the anchor rod 4 at the design position of the wall body plate 1, so it can be used for the support of a higher slope, and has good Anti-seismic performance. And the present invention adds the pilaster 5 at the position where the anchor 4 is added in the longitudinal direction, and the anchor 5 is fixed on the pilaster 5 through the anchor 10, which can avoid stress concentration on the wall panel 1 and cause the wall panel 1 to be overwhelmed. Early destruction.

Description of drawings

Fig. 1 is the elevation schematic view of the cantilever type retaining wall with wall column and anchor rod of the present invention, Fig. 2 is the sectional schematic diagram of the cantilever type retaining wall with wall column and anchor rod of the present invention, Fig. 3 is the wall of the present invention Schematic plan view of a cantilevered retaining wall with columns and anchors. Explanation of reference signs: wall body board 1 of retaining wall, wall toe board 2, wall heel board 3, anchor rod 4, pilaster 5, drain hole 6, anchoring section 9 of anchor rod, free section 10 of anchor rod, anchor 11.

Detailed ways

The invention relates to a cantilever retaining wall with a wall column and an anchor rod and a construction method thereof. The cantilever retaining wall with a wall column and an anchor rod includes a wall body board 1, a wall toe board 2, a wall heel board 3, and an anchor rod 4 , pilaster 5, drain hole 6, anchor rod 4 is made up of anchor section 9 and free section 11, and anchor rod 4 is fixedly connected with pilaster 5 through anchorage 10; Described anchor rod 4 is metal anchor rod, or fiber Anchor rods, or composite anchor rods; the anchor rods 4 form an angle of 10° to 35° with the horizontal direction, and are arranged in one or more rows in the vertical direction.

For the above-mentioned cantilever retaining wall with pilasters and anchor rods, the wall toe board 2 and the wall heel board 3 are reinforced concrete materials.

The wall body panel 1 mentioned above is a reinforced concrete material; the pilaster 5 is a reinforced concrete material with a rectangular cross section.

As shown in Figures 1 and 2, the drain holes 6 are Φ100 PVC pipes with a horizontal and vertical spacing of 2 to 3 m and arranged in a plum blossom shape.

As shown in Figures 1 to 3, the anchoring section 9 of the anchor rod 4 is filled with cement slurry.

As shown in Figures 2 and 3, the free section 11 of the anchor rod 4 is wrapped with a Φ100 PVC pipe and coated with anti-corrosion material to prevent the anchor rod (4) from rusting.

As shown in FIG. 2 , the anchorage 10 is composed of a concrete pedestal, a channel steel, a backing plate and high-strength bolts.

As shown in Figures 1 to 3, the construction method of the cantilever retaining wall with pilasters and anchors is as follows:

(1) Setting out and positioning: Firstly, use measuring instruments to set out the lines according to the engineering design drawings, and then level the site, and use measuring instruments to locate the position of the wall heel plate 3 of the retaining wall;

(2) Construction of the wall heel plate 3 and the wall toe plate 2: set up the formwork at the determined construction position according to the design dimensions of the wall heel plate 3 and the wall toe plate 2, and then pour concrete to form the bottom plate of the cantilever retaining wall;

(3) Construction wall panel 1: According to the design requirements, set up the formwork at the design position of the wall panel, and reserve a hole at the position of the designed anchor rod 4, and then pour concrete to form the wall panel 1;

(4) Construction of the pilaster 5: Determine the position of the pilaster 5 according to the horizontal spacing of the anchor rod 4, then set up the formwork at the position where the pilaster 5 needs to be installed, and reserve a hole at the position where the anchor rod 4 is designed to be placed, and then Pouring concrete to form pilasters 5;

(5) Construction anchor 4: according to the design length and inclination angle of the anchor 4, drill holes in the slope body, place the anchor 4 in the drill hole, and inject anchor slurry to form the anchor section 9 and the free section 11;

(6) Fix the anchor rod 4: use the anchor 10 to fix the anchor rod 4 and the pilaster 5;

(7) Repeat the above steps to construct the next adjacent cantilever retaining wall.

Claims (8)

1. Cantilever retaining wall with pilasters and anchors, including wall body board (1), wall toe board (2), wall heel board (3), anchor rods (4), pilasters (5), drainage The hole (6) is characterized in that the anchor rod (4) is composed of an anchor segment (9) and a free segment (11), and the anchor rod (4) is fixedly connected to the pilaster (5) through the anchor (10); said The anchor rods (4) are metal anchor rods, or fiber anchor rods, or composite anchor rods; the anchor rods (4) form an angle of 10°-35° with the horizontal direction, and are arranged in one or more rows in the vertical direction. 2. The cantilever retaining wall with pilasters and anchor rods according to claim 1, characterized in that: the wall toe board (2) and wall heel board (3) are made of reinforced concrete. 3. The cantilever retaining wall with pilasters and anchors according to claim 1, characterized in that: the wall panel (1) is made of reinforced concrete; the pilaster (5) has a rectangular cross-section reinforced concrete material. 4. The cantilever retaining wall with wall columns and anchor rods according to claim 1, characterized in that: the drain hole (6) is a Φ100 PVC pipe with a horizontal and vertical distance of 2-3m, in the form of Plum blossom arrangement. 5. The cantilever retaining wall with pilasters and anchors according to claim 1, characterized in that: the anchoring section (9) of the anchor (4) is filled with cement slurry. 6. The cantilever retaining wall with pilasters and anchors according to claim 1, characterized in that: the free section (11) of the anchor (4) is wrapped with a Φ100 PVC pipe and coated with anti-corrosion material to prevent the anchor Rod (4) corroded. 7. The cantilever retaining wall with pilasters and anchor rods according to claim 1, characterized in that: said anchor (10) is composed of concrete pedestal, channel steel, backing plate and high-strength bolts. 8. The construction method of the cantilever retaining wall with pilasters and anchor rods is characterized in that the construction steps are: (1) Setting out and positioning: firstly, use the measuring instrument to set out the line according to the engineering design drawing; (2) Construction of wall heel board (3) and wall toe board (2): set up formwork at the determined construction position according to the design dimensions of wall heel board (3) and wall toe board (2), and then pour concrete to form a cantilever type the bottom slab of the retaining wall; (3) Construction of the wall panel (1): According to the design requirements, set up the formwork at the design position of the wall panel, and reserve a hole at the position of the designed anchor rod (4), and then pour concrete to form the wall panel (1); (4) Construction pilasters (5): Determine the position of the pilasters (5) according to the horizontal spacing of the anchor rods (4), then set up the formwork at the position where the pilasters (5) need to be set, and place the anchor rods ( 4) Reserve a hole at the position, and then pour concrete to form a pilaster (5); (5) Construction anchor (4): Drill holes in the slope body according to the design length and inclination angle of the anchor (4), place the anchor (4) in the drilled hole, and inject anchor slurry to form an anchor section (9) and free paragraph (11); (6) Fix the anchor rod (4): use the anchor (10) to fix the anchor rod (4) and the pilaster (5); (7) Repeat the above steps to construct the next adjacent cantilever retaining wall.