Herringbone unloading conversion plate type retaining structure

Abstract

The invention discloses a novel retaining structure, namely a herringbone unloading conversion plate type retaining structure, which comprises a supporting foundation, the top of the supporting foundation is provided with a supporting panel which is obliquely arranged in the direction of a fill slope, and the rear side of the supporting panel is provided with an unloading conversion plate. Compared with the prior art, the device has the advantages that the unloading conversion plate structure is used for converting the soil pressure direction, so that a soil body on the unloading conversion plate tends to move inwards, and reverse downward sliding force acts on the plate. The original on-board soil body which is not beneficial to slope stability is changed into one part of the filling slope, and the on-board soil body and the filling slope jointly resist natural stable soil body of soil pressure. The retaining structure is clear in soil pressure stress mechanism, simple in theoretical calculation, simple in supporting structure construction, convenient to take materials, convenient to transport and install, low in manufacturing cost, suitable for large and small working faces, short in construction period, and suitable for working conditions such as poor soil conditions; the lateral displacement of the foundation pit and the side slope is reduced, the stability is improved, and the method is subversive innovation for the traditional filling side slope design and calculation theory.

Description

Technical Field

[0001] The invention relates to the technical field of retaining technology for fill slope support engineering, in particular to a herringbone unloading conversion plate retaining structure. Background Art

[0002] Fill slope engineering is a complex systematic project. Due to the characteristics of fill slopes (fill cannot be compacted), the construction is difficult, the slope is unstable and the risk is high. In order to ensure the safety of buildings and personnel activities around the fill slopes, it is necessary to build permanent or semi-permanent support structures to ensure the safety of personnel and property. Traditional retaining structures consume a large amount of steel bars and cement and only rely on the deadweight of the retaining wall to resist soil pressure. They have the disadvantages of occupying land, damaging the environment, and having limited support capacity. The existing new support structures still have the disadvantages of high requirements for applicable geological conditions, limited support capacity, and environmental damage. The present invention is based on the mechanical principle of converting active earth pressure into quasi-passive earth pressure. The designed unloading conversion plate retaining wall support structure uses greatly reduced steel bars and cement, is simple and reasonable in mechanics, is convenient and quick in construction, and has many advantages such as being green and efficient.

[0003] The existing retaining structure has many problems and shortcomings, so it is necessary to invent a new, green and efficient retaining structure. The unloading conversion plate of the herringbone unloading conversion plate retaining structure can convert the active earth pressure into the quasi-passive earth pressure, which greatly reduces the lateral earth pressure behind the support surface and increases the quasi-passive earth pressure acting on the fill behind the support surface. The herringbone unloading conversion plate retaining structure is designed based on this conversion principle. Summary of the invention

[0004] The purpose of the present invention is to provide a herringbone unloading conversion plate type retaining structure to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the technical solution provided by the present invention is: a herringbone unloading conversion plate type retaining structure, comprising a supporting foundation, a supporting panel inclined in the direction of the fill slope is provided on the top of the supporting foundation, and a unloading conversion plate is provided on the rear side of the supporting panel;

[0006] The unloading conversion plate is placed tilted downward, and the unloading conversion plate is arranged in the fill slope soil body, and the length of the unloading conversion plate passes through the sliding surface.

[0007] As a preferred solution, the support panel and the unloading conversion plate are rigidly connected or hinged.

[0008] As a preferred solution, the unloading conversion plate is composed of a whole plate or a plurality of strip-shaped conversion unit plates of the same shape and size.

[0009] As a preferred solution, the material of the load-unloading conversion plate is consistent with that of the supporting panel.

[0010] As a preferred solution, the material of the unloading conversion plate and the supporting panel is steel, cast-in-place reinforced concrete beams and slabs, or prefabricated reinforced concrete beams and slabs.

[0011] As a preferred solution, the front end of the unloading conversion plate is arranged obliquely downward at an angle of 30° to 45° in the stable soil layer under the sliding surface of the fill slope.

[0012] As a preferred solution, the angle between the unloading conversion plate and the supporting panel is 75° to 105°.

[0013] As a preferred solution, the unloading conversion plate is provided with one or more layers according to the height of the fill slope.

[0014] The advantages of the present invention compared with the prior art are:

[0015] (1) A load-unloading conversion plate structure is added to the fill slope soil. Due to the action of the load-unloading conversion plate, the unfavorable active earth pressure is converted into a favorable quasi-passive earth pressure. The load-unloading conversion plate changes the direction of the active earth pressure and the thrust direction of the downslope, reduces the horizontal lateral displacement of the fill slope, and improves the stability of the fill slope.

[0016] (2) The herringbone unloading transfer plate retaining structure has a clear earth pressure stress mechanism, simple theoretical calculation, simple structure, and can be prepared on site or prefabricated at a low cost. The unloading transfer plate can be installed by squeezing or burying it in the soil. It is simple to construct and can be applied to small working areas, fast construction periods, poor soil conditions, and other working conditions.

[0017] (3) The unloading conversion plate structure can be a whole plate or split, and can be spliced ​​with a number of I-beams, channel steels, round steels and U-shaped steel plates, or can be cast with concrete, which reduces the construction difficulty and improves the applicability of complex working conditions. It effectively plays the unloading and conversion role of the unloading conversion plate, changes the active earth pressure and the direction of the sliding thrust, reduces the active earth pressure and lateral deformation, thereby reducing the lateral displacement of the foundation pit and slope, and improving the stability of the foundation pit and slope.

[0018] (4) Compared with the traditional fill slope retaining structure design, the present invention uses the unloading conversion plate structure to convert the direction of soil pressure, so that the soil on the unloading conversion plate has a tendency to move inward, and a reverse downward force acts on the plate. The soil on the plate, which is originally not conducive to the stability of the fill slope, is transformed into a part of the retaining structure, and the soil is stabilized by resisting the natural soil pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the rigid connection between the unloading conversion plate and the supporting panel of the present invention.

[0020] As shown in the figure: 1. Support foundation, 2. Fill slope, 3. Support panel, 4. Unloading transfer plate, 5. Sliding surface, W, deadweight of soil on the transfer plate, P, normal stress acting on the transfer plate, E, quasi-passive soil pressure, T, reverse sliding force. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0022] In the description of the embodiments of the present invention, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the invented product is usually placed when used. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0023] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0024] In the description of the embodiments of the present invention, "plurality" means at least 2.

[0025] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] A herringbone unloading conversion plate type retaining structure, comprising a supporting foundation 1, a supporting panel 3 inclined toward a fill slope 2 is provided on the top of the supporting foundation 1, and an unloading conversion plate 4 is provided at the rear side of the supporting panel 3;

[0027] The unloading conversion plate 4 is placed tilted downward. The unloading conversion plate 4 is set in the soil of the fill slope 2 and has a length that passes through the sliding surface 5.

[0028] The support panel 3 and the unloading conversion plate 4 are rigidly connected or hinged.

[0029] The unloading conversion plate 4 is composed of a whole plate or a plurality of strip conversion unit plates of the same shape and size.

[0030] The material of the unloading conversion plate 4 is consistent with that of the supporting panel 3 .

[0031] The materials of the unloading conversion plate 4 and the supporting panel 3 are steel sections (I-beams, channel steels, round steels or U-shaped tensile steel plates), cast-in-place reinforced concrete beams and slabs or prefabricated reinforced concrete beams and slabs.

[0032] The front end of the unloading conversion plate 4 is arranged obliquely downward at an angle of 30° to 45° in the stable soil layer below the sliding surface 5 of the fill slope 2 .

[0033] The angle between the unloading conversion plate 4 and the supporting panel 3 is 75° to 105°.

[0034] The unloading conversion plate 4 is provided with one or more layers according to the height of the fill slope 2 .

[0035] The herringbone unloading conversion plate retaining structure described in the present invention can be applied to high fill slope support. The conversion plate is cast or inserted into the soil of the side wall of the fill slope and connected to the support panel to form an integrated support structure. Different from traditional unloading plates or anchor rods, it has unloading and conversion functions. The unloading conversion plate can convert the active earth pressure in the slope stability calculation into quasi-passive earth pressure.

[0036] The conversion plate is placed obliquely, perpendicular to the support panel or set at a certain angle. The unloading conversion plate is set in the fill slope soil, and its length passes through a certain depth of the sliding surface. The soil on the unloading conversion plate tends to slide along the extension direction of the unloading conversion plate. The relative movement trend of the blocks on the unloading conversion plate forms a reverse sliding force along the direction of the plate, which greatly reduces the active earth pressure and sliding thrust acting on the support panel. The soil on the plate squeezes the soil deep in the sliding surface to naturally form a passive earth pressure.

[0037] The unloading conversion plate changes the characteristics of the direction of active earth pressure and the thrust direction of landslide slump, effectively reducing the horizontal lateral displacement of the fill slope and improving the stability of the fill slope.

[0038] The rear end of the unloading conversion plate component is tightly connected to the supporting component, thereby improving its own stability.

[0039] In the specific implementation of the present invention, 1. according to the geological conditions and construction conditions, steel sections (including steel type, cross-sectional dimensions, etc.), cast-in-place reinforced concrete beams and slabs and prefabricated components are selected;

[0040] 2. According to the height of the fill slope and based on the principle of mechanics, select the appropriate length and number of layers of the unloading transfer plate;

[0041] 3. According to the soil conditions, select the inclination angle of the unloading transfer plate in the slope and foundation pit side wall soil layer.

[0042] By installing a load-unloading conversion plate structure in the soil layer on the sidewall of the fill slope, the load-unloading conversion plate completely changes the direction of active earth pressure and sliding thrust and turns to passive earth pressure, reducing the horizontal lateral displacement of the sidewall of the fill slope and improving the stability of the fill slope. The support structure is easy to install, easy to obtain materials, saves materials, has excellent economic efficiency, is easy to construct, greatly improves construction efficiency, reduces construction difficulty, and maximizes the stability and safety of the slope and foundation pit. It is a subversive innovation to the traditional fill slope design and calculation theory.

[0043] The present invention and its embodiments are described above, which is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it and do not deviate from the purpose of the invention, they can creatively design a structure and embodiment similar to the technical solution, which should fall within the protection scope of the present invention.

Claims

1. A herringbone unloading conversion plate retaining structure, characterized in that: It comprises a supporting foundation, the top of which is provided with a supporting panel inclined in the direction of the fill slope, and the rear side of the supporting panel is provided with a load unloading conversion plate; The unloading conversion plate is placed tilted downward, and the unloading conversion plate is arranged in the fill slope soil body, and the length of the unloading conversion plate passes through the sliding surface.

2. The herringbone unloading conversion plate support structure according to claim 1 is characterized in that: The support panel and the unloading conversion plate are rigidly connected or hinged.

3. The herringbone unloading conversion plate support structure according to claim 1 is characterized in that: The unloading conversion plate is composed of a whole plate or a plurality of strip conversion unit plates of the same shape and size.

4. The herringbone unloading conversion plate support structure according to claim 1 is characterized in that: The material of the load-unloading conversion plate is consistent with that of the supporting panel.

5. The herringbone unloading conversion plate support structure according to claim 4 is characterized in that: The materials of the unloading conversion plate and the supporting panel are steel sections, cast-in-place reinforced concrete beams and slabs, or prefabricated reinforced concrete beams and slabs.

6. The herringbone unloading conversion plate support structure according to claim 1 is characterized in that: The front end of the unloading conversion plate is arranged obliquely downward at an inclination angle of 30° to 45° in a stable soil layer under the sliding surface of the fill slope.

7. The herringbone unloading conversion plate support structure according to claim 1 is characterized in that: The angle between the unloading conversion plate and the supporting panel is 75° to 105°.

8. The herringbone unloading conversion plate support structure according to claim 1 is characterized in that: The unloading conversion plate is provided with one or more layers according to the height of the fill slope.

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