Deep covering layer open channel outer guide wall outlet scour prevention structure

Abstract

The utility model relates to the technical field of water conservancy project construction diversion design, in particular to a deep covering layer open channel outer guide wall outlet scour prevention structure which comprises a consolidation grouting layer, peripheral secant piles and a block stone protection layer, the peripheral secant piles are arranged around the periphery of an outer guide wall, the consolidation grouting layer is arranged below the outer guide wall, and the block stone protection layer is arranged below the outer guide wall. The rock block protection layer covers the periphery of the peripheral secant piles, the peripheral secant piles, the outer guide wall and rock mass are connected to form a rigid enclosure system, the whole rigid enclosure system is used for preventing an open channel outlet from scouring the outer guide wall bottom covering layer to form rigid protection, the consolidation grouting layer is used for replacing a traditional outer guide wall bottom covering layer, and the overall protection effect is good. The erosion resistance of the bottom covering layer of the outer guide wall is enhanced, effective combination of flexible protection and rigid protection is achieved through cooperation of the rock block protection layer and the rigid enclosure system, and the water flow erosion resistance of the outer guide wall and the bottom covering layer of the outer guide wall is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of water conservancy project construction diversion design, in particular to an anti-scouring structure for an outlet of an outer guide wall of an open channel with a deep covering layer. Background Art

[0002] The construction of large-scale water conservancy and hydropower projects often has the characteristics of high diversion standards and large designed flood peak flows. In order to meet the needs of flood discharge during the construction period, open channel diversion is a common diversion method. External guide walls are often used for enclosure construction during open channel excavation and lining. During the operation of the open channel, the external guide wall is used as a longitudinal cofferdam. The external guide wall generally adopts a gravity concrete structure and is located on the bedrock. The end of the external guide wall is close to the original riverbed, the geological conditions are poor, and there is a possibility that the cross section of the guide wall is completely or partially located on the cover layer. During the open channel flow, the cover layer at the bottom of the guide wall is at risk of being washed away or hollowed out by high-speed water flow or backflow, affecting the safety of the open channel outlet and the external guide wall.

[0003] In order to ensure the safety of the outer guide wall or open channel outlet, the protection of domestic existing projects generally adopts measures such as reinforced concrete caisson structure or excavation to the bedrock surface and pouring concrete foundation. However, for deep cover layers and high permeability strata, the construction of caissons and large excavations of cover layers are difficult to drain the foundation pit and have high construction risks. If foundation anti-seepage construction is adopted, it will increase the project investment and construction period. Summary of the invention

[0004] The technical problem to be solved by the utility model is: in order to solve the problem that the bottom covering layer of the outer guide wall is washed away or hollowed out and the construction is difficult, the utility model provides an anti-scouring structure for the outer guide wall outlet of a deep covering layer open channel to solve the above problem.

[0005] The technical solution adopted by the utility model to solve its technical problems is: an anti-collision structure for the outlet of the outer guide wall of a deep covering layer open channel, comprising a consolidation grouting layer, a peripheral bite pile and a block stone protective layer, the peripheral bite piles are arranged around the periphery of the outer guide wall, the consolidation grouting layer is arranged below the outer guide wall, and the block stone protective layer covers the periphery of the peripheral bite piles.

[0006] Preferably, the peripheral interlocking piles, the outer guide wall and the rock mass below the outer guide wall enclose a cavity, and the consolidation grouting layer is located in the cavity and completely covers the area below the outer guide wall.

[0007] Preferably, the height from the top of the peripheral engaging pile to the bottom of the outer guide wall is h1 and is greater than zero.

[0008] Preferably, the bottom and both ends of the peripheral bite piles enter the rock mass, and the depth of the peripheral bite piles entering the rock mass is h3.

[0009] Preferably, the peripheral bite piles are connected to the outer guide wall via anchor bars, and the peripheral bite piles, the outer guide wall and the rock mass are interconnected to form a rigid enclosure system.

[0010] Preferably, the rock block protective layer within the scouring influence range of the diversion open channel water flow is made of large-size rock blocks, and the thickness of the rock block protective layer is h2.

[0011] The beneficial effect of the utility model is that a consolidation grouting layer, a peripheral bite pile and a block stone protective layer are provided, and the peripheral bite piles, the outer guide wall and the rock mass are interconnected to form a rigid enclosure system, and the entire rigid enclosure system is used to block the scouring of the bottom covering layer of the outer guide wall by the open channel outlet, thereby forming a rigid protection, and the consolidation grouting layer is used to replace the traditional bottom covering layer of the outer guide wall, thereby enhancing the erosion resistance of the bottom covering layer of the outer guide wall itself, and the block stone protective layer cooperates with the rigid enclosure system to realize an effective combination of flexible protection and rigid protection, thereby further enhancing the ability of the outer guide wall and its bottom covering layer to resist water erosion. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0013] Figure 1 It is a structural schematic diagram of an optimal embodiment of an anti-scouring structure for an outer guide wall outlet of a deep cover open channel of the utility model;

[0014] Figure 2 The utility model is a schematic diagram of the cross-sectional structure of an outer guide wall of an outer guide wall outlet anti-collision structure of a deep cover open channel.

[0015] Figure numerals: 1. Consolidation grouting layer; 2. Peripheral interlocking piles; 3. External guide wall; 4. Block stone protection layer; 5. Anchor reinforcement; 6. Rock and soil boundary line; 7. Diversion open channel. DETAILED DESCRIPTION

[0016] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0017] like Figure 1 and Figure 2 As shown, the utility model provides an embodiment of an anti-impact structure for an outer guide wall outlet of a deep cover open channel, comprising a consolidation grouting layer 1, peripheral bite piles 2 and a block stone protection layer 4, the peripheral bite piles 2 are arranged around the periphery of an outer guide wall 3, the peripheral bite piles 2 are connected to the outer guide wall 3 through anchor bars 5, so as to improve the connection strength between the peripheral bite piles 2 and the outer guide wall 3, and the consolidation grouting layer 1 is arranged below the outer guide wall 3.

[0018] The peripheral interlocking piles 2, the outer guide wall 3 and the rock mass are interconnected to form a rigid enclosure system. The entire rigid enclosure system is used to block the scouring of the bottom covering layer of the outer guide wall 3 by the open channel outlet, thereby forming a rigid protection. The consolidation grouting layer 1 is used to replace the traditional bottom covering layer of the outer guide wall 3, thereby enhancing the erosion resistance of the bottom covering layer of the outer guide wall 3 itself. In addition, the peripheral interlocking piles 2, the outer guide wall 3 and the consolidation grouting layer 1 are easy to construct, thereby avoiding the problems of foundation pit excavation and foundation pit drainage.

[0019] The peripheral interlocking piles 2 , the outer guide wall 3 and the rock mass below the outer guide wall 3 enclose a cavity, and the consolidation grouting layer 1 is located in the cavity and completely covers the outer guide wall 3 below.

[0020] The height from the top of the peripheral interlocking pile 2 to the bottom of the outer guide wall 3 is h1 and is greater than zero. The value of h1 is set according to the abrasiveness of the water flow at the outlet of the diversion open channel 7 on the concrete.

[0021] The bottom and both ends of the peripheral interlocking pile 2 enter the rock mass. The depth of the peripheral interlocking pile 2 entering the rock mass is h3. The value of h3 is set in combination with the scouring depth and the load bearing of the outlet of the outer guide wall 3.

[0022] The block stone protective layer 4 covers the periphery of the peripheral bite pile 2, and the thickness of the block stone protective layer 4 is h2. The block stone protective layer 4 located within the scouring range of the diversion open channel 7 water flow adopts large-size blocks of stone. The value of h2 is arranged according to the flow velocity of the diversion open channel 7 and the depth of the scouring pit, and the peripheral bite pile 2 is protected to prevent the outlet of the outer guide wall 3 from being impacted by the high-velocity water flow to form a large scouring pit. The block stone protective layer 4 cooperates with the rigid enclosure system to realize the effective combination of flexible protection and rigid protection, and further enhances the ability of the outer guide wall 3 and its bottom covering layer to resist water erosion.

[0023] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0024] With the above-mentioned ideal embodiments of the present invention as inspiration, through the above-mentioned description content, relevant staff can make various changes and modifications without departing from the scope of the technical idea of ​​the present invention.

Claims

1. A deep cover open channel outer guide wall outlet anti-scouring structure, Features: It comprises a consolidation grouting layer (1), a peripheral bite pile (2) and a block stone protective layer (4), wherein the peripheral bite pile (2) is arranged around the periphery of the outer guide wall (3), the consolidation grouting layer (1) is arranged below the outer guide wall (3), and the block stone protective layer (4) covers the periphery of the peripheral bite pile (2).

2. The deep cover layer open channel outer guide wall outlet anti-collision structure as claimed in claim 1, Features: The peripheral interlocking piles (2), the outer guide wall (3) and the rock mass below the outer guide wall (3) enclose a cavity, and the consolidation grouting layer (1) is located in the cavity and completely covers the bottom of the outer guide wall (3).

3. The deep cover layer open channel outer guide wall outlet anti-collision structure as claimed in claim 1, Features: The height from the top of the peripheral engaging pile (2) to the bottom of the outer guide wall (3) is h1 and is greater than zero.

4. The deep cover layer open channel outer guide wall outlet anti-collision structure as claimed in claim 1, Features: The bottom and both ends of the peripheral bite pile (2) enter the rock mass, and the depth of the peripheral bite pile (2) entering the rock mass is h3.

5. The deep cover layer open channel outer guide wall outlet anti-collision structure as claimed in claim 1, Features: The peripheral interlocking piles (2) are connected to the outer guide wall (3) via anchor bars (5); the peripheral interlocking piles (2), the outer guide wall (3) and the rock mass are interconnected to form a rigid enclosure system.

6. The deep cover layer open channel outer guide wall outlet anti-collision structure as claimed in claim 5, Features: The rock block protective layer (4) located within the scouring influence range of the diversion open channel (7) is made of large-size rock blocks, and the thickness of the rock block protective layer (4) is h2.

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