Channel retaining wall supporting structure

Abstract

The utility model discloses a channel retaining wall supporting structure which comprises retaining walls located on the two sides of an approach channel, pile foundations are arranged below the retaining walls, diagonal bracing beams and a bottom plate are arranged between the retaining walls on the two sides of the approach channel, the diagonal bracing beams are buried in a foundation, and the diagonal bracing beams and the foundation form a whole. And meanwhile, the diagonal beams and the bottom plate are connected into a whole. The device is reliable in structure, low in construction cost and wide in backfill material application range.

Description

Technical Field

[0001] The utility model relates to water conservancy projects, in particular to a waterway retaining wall supporting structure. Background Art

[0002] In order to develop large rivers in plain areas with high quality, ship locks are often set up at the dam sites of water conservancy projects when constructing water conservancy projects to meet the requirements of upstream and downstream waterways. In order to ensure the safety of navigation, it is generally necessary to set up pilot channels upstream and downstream of the ship locks. Affected by the seasonal water level fluctuations, the water level difference of the pilot channel varies greatly. For this reason, it is necessary to set up higher retaining wall structures (the height of the retaining wall often reaches more than 20m) upstream and downstream of the ship locks. At the same time, the foundation of the retaining wall in the plain area is usually set on the covering layer, and pile foundations are set to withstand the upper pressure and horizontal thrust of the retaining wall, and the pile foundation engineering volume is large.

[0003] In addition, affected by objective factors, especially the retaining wall adjacent to the gate head, due to the construction layout requirements of the gate head, the foundation of the retaining wall is usually excavated deeper. During construction, local backfilling of gravel and stone is used before pile foundation construction. The original soil is greatly disturbed, and the uncertainty factors of the horizontal resistance of the pile foundation are large, which makes safety accidents prone to occur.

[0004] Chinese patent CN217629679U discloses a retaining wall structure, in which the retaining wall is L-shaped, including a base plate and a baffle. The upper thickness and lower thickness of the baffle are equal, and there is a gap between the base plates of the retaining walls on both sides. Although a supporting beam is arranged between the base plates, it is obvious that the supporting force between the retaining walls on both sides is limited. When subjected to a large impact force, it is easy to become unstable, resulting in a safety accident. Utility Model Content

[0005] The technical problem to be solved by the utility model is that, in view of the shortcomings caused by the construction of the ship lock head, such as the large excavation depth of the foundation of the retaining wall adjacent to the ship lock, the large disturbance of the original soil, the large difference between the horizontal resistance design and the actual state, and the difficulty in ensuring the bearing capacity of the retaining wall, the utility model provides a structurally reliable waterway retaining wall support structure.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A channel retaining wall support structure comprises retaining walls located on both sides of the channel, pile foundations are arranged below the retaining walls, bracing beams and bottom plates are arranged between the retaining walls on both sides of the channel, both ends of the bracing beams are respectively connected to the retaining walls on both sides, and the bracing beams are buried in the foundation and form a whole with the foundation, and at the same time the bracing beams are connected to the bottom plate as a whole.

[0008] In order to improve the pertinence of retaining wall design, the utility model divides the force calculation of the retaining wall into two parts: along the water flow direction and perpendicular to the water flow direction. For the horizontal force in the perpendicular water flow direction, the utility model reduces the requirement for the horizontal bearing capacity of the pile foundation by setting a pair of support beams and a bottom plate connected between the retaining walls on both sides to bear the force as a whole. For the horizontal force in the direction of water flow, the utility model bears the force jointly by the pile foundation and the pair of support beams buried in the foundation, further reducing the requirement for the horizontal bearing capacity of the pile foundation and improving the bearing capacity of the retaining wall. Therefore, the structure of the retaining wall support structure of the utility model is reliable and suitable for use in pilot channels, etc.

[0009] Preferably, the retaining wall has a water retaining surface and a wall back, the water retaining surface is vertically arranged, and the wall back is inclined downward, so that the retaining wall as a whole forms a trapezoidal structure that is thin at the top and thick at the bottom, so as to further improve the structural reliability.

[0010] Preferably, the bracing beams and the bottom plate are connected to the toes of the retaining walls on both sides of the waterway so as not to affect navigation requirements.

[0011] Preferably, when the included angle between the bracing beam and the toe of the retaining wall exceeds 20°, the toe of the retaining wall is arranged in a horizontal step shape to meet the force transmission requirements of the bracing beam.

[0012] Preferably, an expansion joint is provided in the mid-span of the base plate to reduce the influence of the external environment temperature change on the support structure of the utility model.

[0013] Preferably, the back of the retaining wall is backfilled with the first type of backfill soil and the second type of backfill soil in sequence from bottom to top.

[0014] In order to improve the utilization rate of backfill soil, the backfill of the retaining wall adopts a layered and classified backfill method. The first type of backfill soil uses sand and gravel to increase the drainage and consolidation capacity of the backfill soil; the second type of backfill soil uses clay and other materials, thereby reducing the dependence on useful materials such as sand and gravel, expanding the source of backfill materials, and thus reducing the difficulty of waste soil storage. In addition, as the backfill consolidation time is extended, the backfill soil behind the wall is continuously consolidated, the strength is continuously increased, the soil pressure is continuously reduced, and the structure will be safer.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The utility model provides a larger horizontal resistance for the retaining wall by arranging a supporting beam between the retaining walls on both sides, thereby reducing the difficulty of pile foundation arrangement;

[0017] 2. The utility model increases the resistance of the structure in the horizontal direction and further improves the safety of the structure by combining the support beam and the bottom plate and connecting them with the foundation to form a whole;

[0018] 3. The utility model improves the pertinence of the design and the reliability of the design results by decomposing the retaining wall support structure into a design perpendicular to the water flow direction and a design along the water flow direction;

[0019] 4. The utility model improves the source of backfill soil, reduces the difficulty of dumping abandoned soil, and saves resources by backfilling soil in layers and categories on the back of the retaining wall;

[0020] 5. The utility model has the advantages of saving engineering work and high material utilization rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a plan view of the support structure of the waterway retaining wall of the utility model;

[0023] Figure 2 It is a schematic elevation diagram of the waterway retaining wall support structure of the utility model.

[0024] In the figure: 1. retaining wall; 2. pile foundation; 31. base plate; 32. bracing beam; 33. expansion joint; 41. first type backfill; 42. second type backfill; 5. foundation. DETAILED DESCRIPTION

[0025] The present invention is further described below in conjunction with specific preferred embodiments, but the protection scope of the present invention is not limited thereby.

[0026] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship 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 device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that, 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 mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication 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] See also Figure 1 , Figure 2 The utility model waterway retaining wall supporting structure of one embodiment comprises retaining walls 1 on both sides, pile foundation 2, bracing beams 32, bottom plate 31, expansion joints 33, first type backfill 41, second type backfill 42, and foundation 5. The retaining wall 1 has a water retaining surface and a wall back, the water retaining surface is vertically arranged, and the wall back is inclined downward, so that the retaining wall 1 as a whole forms a trapezoidal structure with a thin top and a thick bottom, and the bottom surface of the retaining wall 1 is connected to the pile foundation 2 as a whole. The bracing beams 32 are arranged between the toes of the retaining walls 1 on both sides, and are connected to the toes of the retaining walls 1 on both sides and the bottom plate 31 as a whole, and the bracing beams 32 are buried in the foundation 5 to form a whole with the foundation 5.

[0029] The design idea of ​​the utility model is: in order to improve the pertinence of the design of the retaining wall 1, the force verification of the retaining wall 1 is divided into two parts: the direction along the water flow and the direction perpendicular to the water flow. The horizontal force in the direction perpendicular to the water flow is borne by the whole connected by the support beam 32 and the bottom plate 31, which reduces the requirement for the horizontal bearing capacity of the pile foundation 2. The horizontal force in the direction of the water flow is borne by the pile foundation 2 and the support beam 32 buried in the foundation 5, which further reduces the requirement for the horizontal bearing capacity of the pile foundation 2 and improves the bearing capacity of the retaining wall 1.

[0030] In order to reduce the impact of temperature on the structure, an expansion joint 33 is provided in the mid-span of the bottom plate 31 to reduce the impact of the external environment temperature change on the supporting structure.

[0031] In order to improve the utilization rate of backfill soil, the backfill of the retaining wall 1 adopts a layered and classified backfill method. The first type of backfill soil 41 uses sand and gravel to increase the drainage and consolidation capacity of the backfill soil; the second type of backfill soil 42 can use other materials such as clay, thereby reducing the dependence on useful materials such as sand and gravel, expanding the source of backfill materials, and thus reducing the difficulty of waste soil storage. In addition, as the backfill consolidation time is extended, the backfill soil behind the wall is continuously consolidated, the strength is continuously increased, the soil pressure is continuously reduced, and the structure will be safer.

[0032] In order to improve the application range of the structure, when the angle between the support beam 32 and the toe of the retaining wall 1 exceeds 20°, the toe of the retaining wall 1 is set to a horizontal step shape to meet the force transmission requirements of the support beam 32.

[0033] During the construction of the waterway retaining wall support structure of the utility model, the pile foundation 2 is constructed first, and then the retaining wall 1 is constructed, and the retaining wall 1 and the pile foundation 2 are connected as a whole; the first type of backfill soil 41 is filled; the supporting beam 32 and the concrete bottom plate 31 are poured, so that the supporting beam 32 and the bottom plate 31 are connected as a whole, and placed on the foundation 5, so that the foundation 5 forms a whole; and the second type of backfill soil 42 is filled until all the backfill soil is filled.

[0034] The above is only a specific implementation scheme of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the field can make many possible changes and modifications to the technical scheme of the utility model by using the technical content disclosed above without departing from the scope of the technical scheme of the utility model, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the utility model without departing from the content of the technical scheme of the utility model shall fall within the protection scope of the technical scheme of the utility model.

Claims

1. A channel retaining wall support structure, comprising retaining walls located on both sides of the channel, with pile foundations arranged below the retaining walls, characterized in that: A bracing beam and a bottom plate are arranged between the retaining walls on both sides of the waterway, the two ends of the bracing beam are respectively connected to the retaining walls on both sides, and the bracing beam is buried in the foundation and forms a whole with the foundation, and the bracing beam is connected to the bottom plate as a whole.

2. The channel retaining wall support structure according to claim 1, characterized in that: The retaining wall comprises a water retaining surface and a wall back, wherein the water retaining surface is arranged vertically and the wall back is arranged downwardly inclined, so that the retaining wall as a whole forms a trapezoidal structure which is thin at the top and thick at the bottom.

3. The channel retaining wall support structure according to claim 1, characterized in that: The bracing beams and the bottom plate are connected to the toes of the retaining walls on both sides of the waterway.

4. The channel retaining wall support structure according to claim 3, characterized in that: When the included angle between the bracing beam and the toe of the retaining wall exceeds 20°, the toe of the retaining wall is arranged in a horizontal step shape.

5. The channel retaining wall support structure according to claim 1, characterized in that: An expansion joint is arranged in the mid-span of the base plate.

6. The channel retaining wall support structure according to claim 1, characterized in that: The back of the retaining wall is backfilled with the first type of backfill soil and the second type of backfill soil in sequence from bottom to top.

7. The channel retaining wall support structure according to claim 6, characterized in that: The first type of backfill soil is sand and gravel, and the second type of backfill soil is clay.

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