Unloading conversion plate type retaining wall

Abstract

The unloading conversion plate type retaining wall comprises a foundation, a wall panel is vertically arranged at the top of the foundation, and an unloading conversion plate is arranged on the rear side of the wall panel; and the unloading conversion plate is obliquely arranged downwards and is arranged in the soil body of the fill slope. 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 unfavorable for retaining wall stability is changed into one part of the retaining wall, and the on-board soil body and the retaining wall jointly resist natural stable soil body of soil pressure. The supporting and retaining structure is clear in soil pressure stress mechanism, simple in theoretical calculation, simple in supporting and retaining structure construction, convenient in material taking, convenient to transport and install, low in manufacturing cost, suitable for small working faces, short in construction period, and suitable for working conditions such as poor soil texture 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 traditional foundation pit and side slope design and calculation theories.

Description

Technical Field

[0001] The invention relates to the technical field of retaining structures for slope and foundation pit support engineering, in particular to a load-unloading conversion plate retaining wall. Background Art

[0002] Foundation pit and slope engineering is a complex systematic project with great construction difficulty and high risk. In order to ensure the safety of foundation pit excavation and construction and the safety of buildings and personnel activities around the slope, 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, which has the disadvantages of occupying land, damaging the environment, and limited support capacity; the existing new support structures still have the disadvantages of high requirements for applicable geological conditions, limited support capacity, and damage to the environment. 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 conversion plate of the unloading conversion plate retaining wall can convert the active earth pressure into the quasi-passive earth pressure, which greatly reduces the lateral earth pressure behind the wall and increases the quasi-passive earth pressure acting on the backfill behind the wall. The unloading conversion plate retaining wall is designed based on this conversion principle. Summary of the invention

[0004] The object of the present invention is to provide a load-unloading transfer plate retaining wall to solve the problems raised in the above-mentioned background technology.

[0005] In order to solve the above technical problems, the technical solution provided by the present invention is: a load-unloading conversion plate type retaining wall, comprising a foundation, a wall panel is vertically arranged on the top of the foundation, and a load-unloading conversion plate is arranged on the rear side of the wall 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 wall panel and the load-unloading conversion plate are rigidly connected.

[0008] As a preferred solution, the wall panel and the load-unloading conversion plate are hinged;

[0009] A corbel support is provided on the side of the wall panel, and the end of the unloading conversion plate is placed on the corbel support. The corbel support is consistent with the material of the wall panel, and the number of the unloading conversion plates is equal to that of the corbel support.

[0010] 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.

[0011] As a preferred solution, the wall panel material is rough stone, steel, cast-in-place reinforced concrete beams and slabs, or prefabricated reinforced concrete beams and slabs.

[0012] As a preferred solution, the material of the unloading conversion plate is steel, cast-in-place reinforced concrete beam and slab, or prefabricated reinforced concrete beam and slab.

[0013] As a preferred solution, the front end of the unloading conversion plate is embedded obliquely downward at an angle of 15° to 45° into the stable soil layer of the slope and the side wall of the foundation pit.

[0014] As a preferred solution, the unloading conversion plate is arranged in one or more layers according to the height of the slope and the depth of the foundation pit.

[0015] The advantages of the present invention compared with the prior art are:

[0016] (1) Adding a load-unloading conversion plate structure to the foundation pit and slope soil, the unfavorable active earth pressure is converted into a favorable quasi-passive earth pressure due to the action of the unloading conversion plate. The 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 foundation pit and slope, and improves the stability of the foundation pit and slope.

[0017] (2) The earth pressure stress mechanism of the unloading transfer plate retaining wall is clear, the theoretical calculation is simple, the structure is simple, it can be prepared on site or prefabricated at a low cost. The unloading transfer plate can be installed by squeezing it into the soil, and the backfill can also be cast in place. The construction is simple and can be applied to small working areas, fast construction periods, poor soil conditions and other working conditions.

[0018] (3) The unloading conversion plate structure can be a whole plate or split, and is composed of several I-beams, channel steels, round steels and U-shaped steel plates, 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.

[0019] (4) Compared with the traditional foundation pit and 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 there is a reverse downward force on the plate. The soil on the plate, which is originally not conducive to the stability of the retaining wall, is transformed into a part of the retaining wall, and the soil is stabilized by resisting the natural soil pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1It is a structural schematic diagram of the hinged connection between the load-relief conversion plate and the wall panel in Example 1 of the present invention.

[0021] Figure 2 It is a schematic structural diagram of the rigid connection between the load-relief conversion plate and the wall panel in Example 2 of the present invention.

[0022] As shown in the figure: 1. Foundation, 2. Wall panel, 3. Unloading transfer plate, 4. Sliding surface, 5. Corbel support, 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

[0023] 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.

[0024] 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.

[0025] 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.

[0026] In the description of the embodiments of the present invention, "plurality" means at least 2.

[0027] 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.

[0028] Example 1

[0029] A load-unloading conversion plate type retaining wall comprises a foundation 1, a wall panel 2 is vertically arranged on the top of the foundation 1, and a load-unloading conversion plate 3 is arranged on the rear side of the wall panel 2;

[0030] The unloading conversion plate 3 is placed tilted downward, and the unloading conversion plate 3 is arranged in the fill slope soil, and the length of the unloading conversion plate 3 passes through the sliding surface 4.

[0031] The wall panel 2 and the load-unloading conversion plate 3 are hinged;

[0032] A corbel support 5 is provided on the side of the wall panel 2, and the end of the unloading conversion plate 3 is placed on the corbel support 5. The material of the corbel support 5 is consistent with that of the wall panel 2, and the number of the unloading conversion plates 3 and the corbel support 5 is equal.

[0033] The unloading conversion plate 3 is composed of a whole plate or a plurality of strip conversion unit plates of the same shape and size.

[0034] The wall panel 2 is made of rough stone, steel, cast-in-place reinforced concrete beams and slabs, or prefabricated reinforced concrete beams and slabs.

[0035] The material of the unloading conversion plate 3 is steel (I-beam, channel steel, round steel or U-shaped tensile steel plate), cast-in-place reinforced concrete beam and slab or prefabricated reinforced concrete beam and slab.

[0036] The front end of the unloading conversion plate 3 is embedded obliquely downward in the stable soil layer of the slope and the side wall of the foundation pit at an inclination angle of 15° to 45°.

[0037] The unloading conversion plate 3 is arranged in one or more layers according to the height of the slope and the depth of the foundation pit.

[0038] Example 2

[0039] A load-unloading conversion plate type retaining wall comprises a foundation 1, a wall panel 2 is vertically arranged on the top of the foundation 1, and a load-unloading conversion plate 3 is arranged on the rear side of the wall panel 2;

[0040] The unloading conversion plate 3 is placed tilted downward, and the unloading conversion plate 3 is arranged in the fill slope soil, and the length of the unloading conversion plate 3 passes through the sliding surface 4.

[0041] The wall panel 2 and the load-relief conversion plate 3 are rigidly connected.

[0042] The unloading conversion plate 3 is composed of a whole plate or a plurality of strip conversion unit plates of the same shape and size.

[0043] The wall panel 2 is made of rough stone, steel, cast-in-place reinforced concrete beams and slabs, or prefabricated reinforced concrete beams and slabs.

[0044] The material of the unloading conversion plate 3 is steel (I-beam, channel steel, round steel or U-shaped tensile steel plate), cast-in-place reinforced concrete beam and slab or prefabricated reinforced concrete beam and slab.

[0045] The front end of the unloading conversion plate 3 is embedded obliquely downward in the stable soil layer of the slope and the side wall of the foundation pit at an inclination angle of 15° to 45°.

[0046] The unloading conversion plate 3 is arranged in one or more layers according to the height of the slope and the depth of the foundation pit.

[0047] The unloading conversion plate retaining wall described in the present invention can be applied to foundation pit excavation support, natural slope or artificial fill slope support. The unloading conversion plate retaining wall structure consists of a wall panel, a corbel support and a conversion plate. The function of the unloading conversion plate is different from that of a traditional unloading plate. It has unloading and conversion functions. The unloading conversion plate can convert the active earth pressure in the foundation pit and slope stability calculation into quasi-passive earth pressure, and also has an unloading function.

[0048] The unloading conversion plate is placed at an angle, and the soil on the plate tends to slide along the extension direction of the conversion plate. The relative movement trend of the blocks on the unloading conversion plate forms a reverse downward force along the direction of the plate, which greatly reduces the active earth pressure acting on the wall panel. The soil on the plate squeezes the soil deep in the sliding surface to naturally form a passive earth pressure.

[0049] The conversion plate changes the direction of active earth pressure and the thrust direction of landslide slump, effectively reducing the horizontal lateral displacement of the foundation unloading pit and the slope, and improving the stability of the foundation pit and the slope.

[0050] 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;

[0051] 2. According to the slope height and the depth of the foundation pit, select the appropriate length and number of layers of the unloading transfer plate based on the principle of mechanics;

[0052] 3. According to the soil conditions, select the inclination angle of the slope and the soil unloading conversion plate on the side wall of the foundation pit.

[0053] By installing a load-unloading conversion plate structure in the soil layer of the side wall of the slope and foundation pit, the load-unloading conversion plate completely changes the direction of active earth pressure and sliding thrust and turns it into passive earth pressure, reduces the horizontal lateral displacement of the side wall of the slope and foundation pit, and improves the stability of the slope and foundation pit. The support structure is easy to install, convenient 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. The invention is a subversive innovation to the traditional slope and foundation pit design and calculation theory. The above describes the present invention and its implementation methods, which is not restrictive. What is shown in the accompanying drawings is only one of the implementation methods of the present invention, and the actual structure is not limited to this. In short, if ordinary technicians in this field are inspired by it, without departing from the purpose of the invention, they can creatively design structural methods and embodiments similar to the technical solution, which should all belong to the protection scope of the present invention.

Claims

1. A load-unloading conversion plate retaining wall, characterized in that: It comprises a foundation, a wall panel is vertically arranged on the top of the foundation, and a load unloading conversion plate is arranged on the rear side of the wall panel; 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 load-unloading conversion plate retaining wall according to claim 1 is characterized in that: The wall panel and the load-relief conversion plate are rigidly connected.

3. The unloading conversion plate retaining wall according to claim 1 is characterized in that: The wall panel and the load-unloading conversion plate are hinged; A corbel support is provided on the side of the wall panel, and the end of the unloading conversion plate is placed on the corbel support. The corbel support is consistent with the material of the wall panel, and the number of the unloading conversion plates is equal to that of the corbel support.

4. A load-unloading conversion plate retaining wall according to claim 2 or 3, 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.

5. The unloading conversion plate retaining wall according to claim 2 or 3, characterized in that: The wall panel material is rough stone, steel, cast-in-place reinforced concrete beam and slab or prefabricated reinforced concrete beam and slab.

6. A load-unloading conversion plate retaining wall according to claim 2 or 3, characterized in that: The material of the unloading conversion plate is steel, cast-in-place reinforced concrete beam and slab, or prefabricated reinforced concrete beam and slab.

7. The load-unloading conversion plate retaining wall according to claim 1 is characterized in that: The front end of the unloading conversion plate is embedded obliquely downward in the stable soil layer of the slope and the side wall of the foundation pit at an inclination angle of 15° to 45°.

8. The load-unloading conversion plate retaining wall according to claim 1 is characterized in that: The unloading conversion plate is arranged in one or more layers according to the height of the slope and the depth of the foundation pit.

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