Edge supporting structure

Abstract

The utility model discloses an edge supporting and retaining structure which comprises a drill hole formed in the outer side of an existing structure, a steel pipe pile is arranged in the drill hole, a steel bar bundle is inserted into the pipe, mortar is poured into the pipe, a surface protecting wall is arranged on the outer side of the steel pipe pile, and the surface protecting wall is connected with the steel pipe pile through a tie bar. According to the edge supporting and retaining structure, the steel pipe piles are used for achieving the temporary supporting effect, and permanent treatment of a side slope is completed on the premise that safety of an existing building on the inner side of an excavation area is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of water conservancy projects, in particular to an edge retaining structure suitable for small river channel reconstruction and reservoir bank protection projects. Background Art

[0002] There are existing roads above the normal water storage level of some newly built reservoirs. Due to the construction of the reservoir, the water level rises, causing the stability of the outer slope of the road to deteriorate, which needs to be managed. Rebuilding the road will affect traffic. Similarly, in rural river regulation, it is often encountered that nearby residents build close to the river, and the side walls of the river are nearly vertical. When conducting river regulation, building traditional retaining walls or slope reduction treatments will inevitably have an adverse impact on the houses along the bank. When the elevation of the house meets the flood control requirements and the foundation is stable, such an impact is unnecessary and will also have an adverse impact on the normal life of the residents and affect the normal implementation of livelihood projects. Utility Model Content

[0003] In order to solve the above problems, the utility model provides an edge retaining structure, which uses steel pipe piles for temporary support and completes the permanent management of the slope while ensuring the safety of existing buildings inside the excavation area.

[0004] The utility model is realized through the following technical solutions.

[0005] A retaining structure at an edge includes a drill hole arranged outside an existing structure, a steel pipe pile is placed inside the drill hole, a steel bar bundle is inserted into the pipe and mortar is poured, a protective wall is arranged outside the steel pipe pile, and the protective wall and the steel pipe pile are connected by tension bars.

[0006] Furthermore, the depth of the drill hole buried in the rock mass is not less than 1 / 3 to 1 / 2 of the height of the upper part of the rock mass, the hole diameter is not less than 150 mm, and the hole spacing is 2 to 3 m.

[0007] Furthermore, the diameter of the steel pipe pile is 2 cm smaller than the diameter of the drilled hole, and the wall thickness is not less than 5 mm.

[0008] Furthermore, the steel tendon and the steel pipe pile have the same length.

[0009] Furthermore, the pipe wall of the steel pipe pile buried in the rock mass is provided with grouting holes to form a flower pipe, and mortar is poured into the pipe through the grouting holes. When the upper soil is non-cohesive soil, the flower pipe is the entire steel pipe section.

[0010] Furthermore, a row of prestressed anchor cables is arranged in the middle of the retaining wall in the direction of the existing structure, and anchor rods are evenly arranged in other parts in the direction of the existing structure.

[0011] Furthermore, the facing wall is made of reinforced concrete slab.

[0012] The beneficial effect of the utility model is that the steel pipe piles are used for temporary support, and the permanent treatment of the slope is completed under the premise of ensuring the safety of the existing buildings inside the excavation area. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a general plan view of the edge support structure of the utility model;

[0014] Figure 2 It is a side view of the edge support structure of the utility model;

[0015] Figure 3 It is a horizontal cross-sectional view of the edge support structure of the utility model;

[0016] Figure 4 It is a structural schematic diagram of the steel pipe pile of the utility model.

[0017] In the figure: existing structure 1, unstable soil 2, slope 3, steel pipe piles 4, steel bar bundles 41, mortar 42, facing wall 5, tension bars 6, prestressed anchor cables 7, anchor rods 8. DETAILED DESCRIPTION

[0018] The following is a further description of the structures involved in the present invention or the technical terms used. These descriptions are merely examples of how the present invention is implemented and do not constitute any limitation to the present invention.

[0019] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left" and "right" indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the positions or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations of the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0020] In the description of the present invention, unless otherwise clearly specified and limited, "connection", "fixation" and the like should be understood in a broad sense. For example, "fixation" 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, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] like Figure 1-4As shown, a retaining structure at an edge includes a drilled hole arranged outside an existing structure 1, a steel pipe pile 4 is placed inside the drilled hole, a steel bar bundle 41 is inserted into the pipe and mortar 42 is poured, a retaining wall 5 is arranged outside the steel pipe pile 4, and the retaining wall 5 and the steel pipe pile 4 are connected by tie bars 6.

[0022] Among them, the existing structure 1 is an existing building that needs to be protected, such as a road, a house, etc. The edge support structure is arranged between the existing building 1 that needs to be protected and the unstable soil 2 that needs to be excavated on the outside. Below the unstable soil 2 that needs to be excavated on the outside is a slope 3.

[0023] Specifically, one end of the tie rod 6 penetrates the facing wall 5 and is anchored on the wall, and the other end bypasses the steel pipe pile 4 and is inserted into the wall. The tie rod 6 serves as a temporary force transmission member between the steel pipe pile 4 and the facing wall 5, connecting the facing wall 5 and the steel pipe pile 4 into a whole.

[0024] As an optional embodiment, the depth of the drill hole buried in the rock mass is not less than 1 / 3 to 1 / 2 of the height of the upper part of the rock mass, the hole diameter is not less than 150 mm, and the hole spacing is 2 to 3 m. The rock mass is stable, and the steel pipe pile is anchored in the rock mass, the lower end forms an anchoring section, and the upper part becomes a load-bearing cantilever structure.

[0025] As an optional embodiment, the diameter of the steel pipe pile 4 is 2 cm smaller than the borehole diameter, and the wall thickness is not less than 5 mm. The wall thickness requirement is because the steel pipe pile 4 needs to have a certain rigidity, and it is easy to bend if it is too thin.

[0026] As an optional embodiment, the length of the steel bar bundle 41 is the same as that of the steel pipe pile 4. The steel bar bundle 41 and the steel pipe pile 4 are integrally formed after grouting, and have a greater bearing capacity.

[0027] As an optional embodiment, the wall of the steel pipe pile 4 buried in the rock mass is provided with grouting holes to form a flower pipe, and grouting is poured into the pipe through the grouting holes. When the upper soil (unstable soil that needs to be excavated on the outside) is non-cohesive soil, the flower pipe is the entire steel pipe section. Specifically, the steel pipe pile is placed, and the inside of the pipe is grouted until the slurry overflows the ground surface and then the steel bar bundle 41 is inserted. When the upper soil is non-cohesive soil, the slurry in the steel pipe pile 4 diffuses into the upper soil, and at the same time plays a role in reinforcing the soil, ensuring the stability of the soil side wall during temporary excavation.

[0028] As an optional embodiment, a row of prestressed anchor cables 7 is arranged in the middle of the retaining wall 5 in the direction of the existing structure, and anchor rods 8 are evenly arranged in other parts in the direction of the existing structure. The anchor cables 7 can provide active support force to supplement the soil pressure unloaded after the soil behind the wall is excavated.

[0029] As an optional embodiment, the retaining wall 5 is made of reinforced concrete slab.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A retaining structure for an edge, characterized in that: It includes a drill hole located outside the existing structure, with a steel pipe pile placed inside the drill hole, a steel bar bundle inserted into the pipe and mortar poured in, a protective wall provided on the outside of the steel pipe pile, and the protective wall and the steel pipe pile are connected by tension bars. The depth of the drill hole buried in the rock mass is not less than 1 / 3~1 / 2 of the upper height of the rock mass, the hole diameter is not less than 150mm, the hole spacing is 2~3m, the diameter of the steel pipe pile is 2cm smaller than the diameter of the drill hole, and the wall thickness is not less than 5mm.

2. The edge support structure according to claim 1, characterized in that: The length of the steel tendon is the same as the length of the steel pipe pile.

3. The edge support structure according to claim 1, characterized in that: The pipe wall of the steel pipe pile buried in the rock mass is provided with grouting holes to form a flower pipe, through which mortar is poured into the pipe. When the upper soil is non-cohesive soil, the flower pipe is the entire steel pipe section.

4. The edge support structure according to claim 1, characterized in that: A row of prestressed anchor cables is arranged in the middle of the retaining wall toward the existing structure.

5. The edge support structure according to claim 4, characterized in that: The facing wall is made of reinforced concrete slab.

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