Pre-stressed anchor cable cable-stayed retaining wall and construction method thereof

Abstract

The invention provides a pre-stressed anchor cable cable-stayed retaining wall and a construction method thereof, reinforced concrete walls are poured layer by layer from bottom to top according to the trend of a foundation pit slope, and in the pouring process, sleeves are pre-buried in concrete; and when the reinforced concrete wall body reaches the preset strength, one end of the pre-stressed anchor cable is inserted into the reserved casing pipe and extends to the side slope soil layer or the foundation pit subsoil layer, the other end of the pre-stressed anchor cable is connected with the fixed waist beam, and construction of the pre-stressed anchor cable cable-stayed retaining wall is completed. According to the pre-stressed anchor cable cable-stayed retaining wall and the construction method thereof, operation is convenient, the speed is high, compared with a traditional gravity retaining wall, the pre-stressed anchor cable cable-stayed retaining wall is more economical, concrete is saved, and particularly when anchor rods or soil nails are not arranged on the periphery of a side slope for construction and soil texture below a base is good, a base rock layer can be fully used as a bearing layer to achieve the soil retaining effect.

Description

Technical Field

[0001] The invention relates to the technical field of foundation pit slope support, and in particular to a prestressed anchor cable oblique-stayed retaining wall and a construction method thereof. Background Art

[0002] During the construction process, the traditional pit support methods are soil nail spraying, cantilever piles + prestressed anchor cables or other support forms. Especially when there are basements, tunnels, underground pipelines or other structures around the pit, the support forms of soil nails or prestressed anchor cables are limited, or when the pit has a local landslide, the slope soil is not suitable for re-implanting soil nails. The cantilever support piles have a long construction period, which affects the construction progress and increases the construction cost. Summary of the invention

[0003] In view of this, one aspect of the present invention proposes a prestressed anchor cable oblique-stayed retaining wall, comprising a reinforced concrete wall built according to a foundation pit slope and a waist beam arranged along its periphery; the reinforced concrete wall is an inclined retaining wall, which is arranged inclination according to the foundation pit slope, and a plurality of waist beams are arranged in sequence along the height direction of the reinforced concrete wall. A plurality of prestressed anchor cables are also arranged in sequence on the waist beam, one end of which penetrates the waist beam and the reinforced concrete wall and extends into the slope soil layer or the bottom soil layer of the foundation pit, and the other end is fixed to the waist beam.

[0004] Furthermore, drainage ditches are respectively arranged at the top and bottom of the reinforced concrete wall; the drainage ditch at the bottom is arranged at the bottom of the foundation pit and close to the reinforced concrete wall, and the drainage ditch at the top is arranged in the flat area at the top of the reinforced concrete wall.

[0005] Furthermore, the groove of the drainage ditch is arranged separately from the reinforced concrete wall.

[0006] Furthermore, an edge protection railing is provided on the top of the reinforced concrete wall.

[0007] Furthermore, the reinforced concrete wall is provided with a plurality of through drainage holes, which can guide the water accumulated in the wall to drain out.

[0008] Furthermore, the drainage hole is a through hole arranged horizontally.

[0009] The prestressed anchor cable inclined retaining wall provided by the present invention has the following advantages: it is composed of edge protection railings, drainage ditches, drainage holes, reinforced concrete waist beams, inclined reinforced concrete walls, and prestressed anchor cables. The wall is easy to construct and has a fast construction speed. It is more economical and saves concrete than traditional gravity retaining walls. Especially when there is no anchor rod or soil nail construction around the slope and the soil below the base is good, the base rock layer can be fully utilized as a bearing layer to achieve the retaining effect.

[0010] Another aspect of the present invention further provides a construction method of the prestressed anchor cable inclined retaining wall as described above, comprising: The reinforced concrete wall is constructed by pouring the reinforced concrete wall layer by layer from bottom to top according to the trend of the foundation pit slope. During the pouring process, the casing is embedded in the concrete. When the waist beam is installed and the reinforced concrete wall reaches the preset strength, one end of the prestressed anchor cable is inserted into the reserved casing and extended to be embedded in the slope soil layer or the bottom soil layer of the foundation pit, and the other end is connected to the fixed waist beam.

[0011] Furthermore, when the concrete strength reaches above 85%, the prestressed anchor cables are tensioned.

[0012] Furthermore, when the prestressed anchor cable is embedded into the slope soil layer, the depth of the prestressed anchor cable embedded into the slope soil layer is greater than the depth of the prestressed anchor cable embedded into the bottom soil layer of the foundation pit.

[0013] Furthermore, before casting the reinforced concrete wall, the backfill soil is compacted on the slope of the foundation pit.

[0014] The construction method of the prestressed anchor cable inclined retaining wall provided by the present invention is easy to operate and fast, and is more economical and saves concrete than the traditional gravity retaining wall. In particular, when there is no anchor rod or soil nail construction around the slope and the soil quality below the base is good, the base rock layer can be fully utilized as the bearing layer to achieve the retaining effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings: Figure 1 A schematic structural diagram of a prestressed anchor cable inclined retaining wall provided in an embodiment of the present invention; In the figure, 1. edge protection railing, 2. drainage ditch, 3. drainage hole, 4. waist beam, 5. reinforced concrete wall, 6. prestressed anchor cable. DETAILED DESCRIPTION

[0016] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to be able to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features described in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0017] See also Figure 1 As shown, it is a prestressed anchor cable oblique-stayed retaining wall provided by an embodiment of the present invention, comprising a reinforced concrete wall 5 built according to the foundation pit slope and a waist beam 4 arranged along the periphery thereof. In this embodiment, a reinforced concrete waist beam is adopted; the reinforced concrete wall 5 is an inclined retaining wall, which is arranged according to the inclination of the foundation pit slope, and the waist beam 4 is arranged in sequence along the height direction of the reinforced concrete wall 5. A plurality of prestressed anchor cables 6 are also arranged in sequence on the waist beam 4, one end of which penetrates the waist beam 4 and the reinforced concrete wall 5, and extends into the slope soil layer or the bottom soil layer of the foundation pit, and the other end is fixed to the waist beam 4.

[0018] Reference Figure 1 As shown, in this embodiment, drainage ditches 2 are respectively arranged at the top and bottom of the reinforced concrete wall 5; the drainage ditch 2 located at the bottom is arranged at the bottom of the foundation pit and close to the reinforced concrete wall 5, and the drainage ditch 2 located at the top is arranged in the flat area on the top of the reinforced concrete wall 5; and the grooves of the two drainage ditches 2 are separately arranged from the reinforced concrete wall 5.

[0019] Continue to refer to Figure 1 As shown, a peripheral guardrail 1 is also provided on the top of the reinforced concrete wall 5 , and the peripheral guardrail is provided in a flat area on the top of the reinforced concrete wall 5 .

[0020] Reference Figure 1 As shown in the figure, the reinforced concrete wall 5 is provided with a plurality of through drainage holes 3, which can guide and drain the accumulated water in the reinforced concrete wall 5. In this embodiment, the drainage holes 3 are horizontally arranged through holes.

[0021] The prestressed anchor cable inclined retaining wall provided by the present invention has the following advantages: it is composed of edge protection railings, drainage ditches, drainage holes, reinforced concrete waist beams, inclined reinforced concrete walls, and prestressed anchor cables. The wall is easy to construct and has a fast construction speed. It is more economical and saves concrete than traditional gravity retaining walls. Especially when there is no anchor rod or soil nail construction around the slope and the soil below the base is good, the base rock layer can be fully utilized as a bearing layer to achieve the retaining effect.

[0022] Another embodiment of the present invention further discloses a construction method of the prestressed anchor cable inclined retaining wall as described in the above embodiment, comprising: Reinforced concrete wall construction: pour the reinforced concrete wall layer by layer from top to bottom according to the trend of the foundation pit slope. During the pouring process, pre-buried sleeves are embedded in the concrete. When the waist beam is installed and the reinforced concrete wall reaches the preset strength, one end of the prestressed anchor cable is inserted into the reserved casing and extended to be embedded in the slope soil layer or the bottom soil layer of the foundation pit, and the other end is connected to the fixed waist beam.

[0023] In this embodiment, when the concrete strength reaches above 85%, the prestressed anchor cables are tensioned.

[0024] During the specific construction, a part of the prestressed anchor cable is embedded in the soil layer of the slope, and a part of the prestressed anchor cable is embedded in the soil layer at the bottom of the foundation pit. The soil layer at the bottom of the foundation pit has better strength than the soil layer of the slope, such as a rock layer, which can provide a better bearing layer for the prestressed anchor cable. When the anchor cable is embedded in the soil layer at the bottom of the foundation pit, the embedding depth can be appropriately reduced. Before casting the reinforced concrete wall, the backfill soil is compacted at the slope of the foundation pit.

[0025] The construction method of the prestressed anchor cable inclined retaining wall provided by the present invention is easy to operate and fast, and is more economical and saves concrete than the traditional gravity retaining wall. In particular, when there is no anchor rod or soil nail construction around the slope and the soil quality below the base is good, the base rock layer can be fully utilized as the bearing layer to achieve the retaining effect.

[0026] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0027] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A prestressed anchor cable inclined retaining wall, characterized in that: It includes a reinforced concrete wall built according to the slope of the foundation pit and a waist beam arranged along its periphery; the reinforced concrete wall is an inclined retaining wall, which is arranged according to the inclination of the foundation pit slope, and the waist beams are arranged in sequence along the height direction of the reinforced concrete wall. A plurality of prestressed anchor cables are also arranged in sequence on the waist beam, one end of which penetrates the waist beam and the reinforced concrete wall and extends into the slope soil layer or the bottom soil layer of the foundation pit, and the other end is fixed to the waist beam.

2. The prestressed anchor cable inclined retaining wall according to claim 1 is characterized in that: Drainage ditches are respectively arranged at the top and bottom of the reinforced concrete wall; the drainage ditch at the bottom is arranged at the bottom of the foundation pit and close to the reinforced concrete wall, and the drainage ditch at the top is arranged in the flat area at the top of the reinforced concrete wall.

3. The prestressed anchor cable inclined retaining wall according to claim 2 is characterized in that: The groove of the drainage ditch is arranged separately from the reinforced concrete wall.

4. The prestressed anchor cable inclined retaining wall according to claim 1 is characterized in that: An edge protection railing is also arranged on the top of the reinforced concrete wall.

5. The prestressed anchor cable inclined retaining wall according to claim 1 is characterized in that: The reinforced concrete wall is provided with a plurality of through drainage holes, which can guide and drain the water accumulated in the wall.

6. The prestressed anchor cable inclined retaining wall according to claim 5 is characterized in that: The drain hole is a through hole arranged horizontally.

7. A construction method for a prestressed anchor cable oblique-stayed retaining wall as claimed in any one of claims 1 to 6, characterized in that: include: The reinforced concrete wall is constructed by pouring the reinforced concrete wall layer by layer from bottom to top according to the trend of the foundation pit slope. During the pouring process, the casing is embedded in the reinforced concrete. When the waist beam is installed and the reinforced concrete wall reaches the preset strength, one end of the prestressed anchor cable is inserted into the reserved casing and extended to be embedded in the slope soil layer or the bottom soil layer of the foundation pit, and the other end is connected to the fixed waist beam.

8. The construction method of the prestressed anchor cable inclined retaining wall according to claim 7 is characterized in that: When the concrete strength reaches above 85%, the prestressed anchor cables are tensioned.

9. The construction method of the prestressed anchor cable inclined retaining wall according to claim 7, characterized in that: When the prestressed anchor cable is embedded into the slope soil layer, the depth of the prestressed anchor cable embedded into the slope soil layer is greater than the depth of the prestressed anchor cable embedded into the foundation pit bottom soil layer.

10. The construction method of the prestressed anchor cable inclined retaining wall according to claim 7, characterized in that: Before casting the reinforced concrete wall, the backfill soil is compacted on the slope of the foundation pit.

Images