Filling side slope supporting and retaining structure suitable for being close to riverway

Abstract

The invention discloses a retaining structure suitable for a fill slope close to a river channel, which comprises a plurality of layers of stiffened strips buried in the fill slope and a plurality of mechanical pore-forming circular piles arranged side by side, and the plurality of mechanical pore-forming circular piles are arranged close to the bottom of the fill slope. A steel casing which penetrates through the water-rich soil layer and protrudes out of the original soil layer is arranged in the mechanical hole-forming circular pile, so that an anti-slide pile is formed; wherein the plurality of anti-slide piles are connected with the soil retaining plate, the soil retaining plate is in contact with one side of the reinforced strip, the soil retaining plate is arranged on the free section, a reinforcement cage is further arranged in the steel casing, and concrete amplification locking openings are formed in the positions, located at the height of the original soil layer, of the anti-slide piles so that the anti-slide piles can be integrally formed. The requirement for the stability coefficient that the filling side slope needs to be retracted to form the vertical free section when the sloping distance and the slope ratio are limited can be met, for example, the filling side slope close to a river channel and the anti-slide pile can be integrally formed, construction joints are prevented from being left, and the problem that the anti-slide pile penetrates through a water-rich deep and thick soft soil layer to collapse holes repeatedly is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of electric power engineering, and in particular relates to a fill slope retaining structure suitable for a river channel. Background Art

[0002] As the contradiction between the buildable land area and construction needs becomes increasingly fierce, fill slope support projects are used more and more frequently. In engineering practice, the support methods used for fill slopes mainly include: gravity retaining wall, buttress retaining wall, pile-board retaining wall and slope rate method, etc. When the fill slope is close to the river channel, the slope distance and slope ratio are limited. The bottom of the fill slope is in a water-rich area all year round and is covered with a thick soft soil layer. The fill slope is easy to slide through the soft soil layer. It is difficult to meet the requirements of the fill slope stability coefficient when using conventional retaining structures for support. Summary of the invention

[0003] The purpose of the present invention is to overcome the defects of the prior art and provide a retaining structure for fill slopes near rivers. The anti-slip piles, retaining plates and reinforced strips buried in the fill slopes can meet the stability coefficient requirements of the fill slopes that need to be retracted to form a vertical air-facing section when the slope distance and slope ratio are limited. The enlarged concrete locks set at the height of the original soil layer are convenient for the installation of anti-slip piles and other modules. At the same time, the mechanically bored round piles are used to facilitate the integral molding of the anti-slip piles, avoid leaving construction joints, and solve the problem of repeated collapse of the anti-slip piles when they pass through thick and soft soil layers rich in water.

[0004] The object of the present invention is achieved through the following technical solutions:

[0005] A retaining structure for fill slopes near a river channel, comprising a multi-layer reinforced strip buried in the fill slope and a plurality of mechanically bored round piles arranged side by side along the flow direction of the river channel, wherein the plurality of mechanically bored round piles are arranged near the bottom of the fill slope, and a steel casing is arranged in the mechanically bored round piles, which passes through a water-rich soil layer and protrudes out of an original soil layer, so as to form an anti-sliding pile;

[0006] Among them, multiple anti-sliding piles are connected to the retaining board through embedded reinforcement, the retaining board is in contact with one side of the reinforcement strip, the retaining board is arranged in the air section of the anti-sliding pile close to the sliding surface of the fill slope, and the steel casing is also provided with a steel cage formed by threaded segments. The anti-sliding pile is located at the height of the original soil layer and is provided with a concrete enlarged lock mouth for the anti-sliding pile to be formed in one piece.

[0007] In one embodiment, a steel cage formed by threaded segments is also provided in the steel casing.

[0008] In one embodiment, the retaining plate is composed of a plurality of prefabricated sub-plates, and the prefabricated sub-plates are connected to the anti-slip piles through embedded steel bars anchored in the anti-slip piles in the horizontal direction. The embedded steel bars penetrate the prefabricated sub-plates and are also provided with threads for fixing the prefabricated sub-plates. Through this embodiment, pre-processing can be carried out in the factory to shorten the on-site construction time. At the same time, after completing the connection construction of a section of the prefabricated sub-plate and the anti-slip piles, the reinforced strips can be constructed in the fill slope corresponding to the position of the section, thereby realizing the cross-construction operation of fill and retaining plate installation, greatly improving the construction efficiency, and effectively avoiding the operational risks of on-site casting of retaining plates in the vertical air-facing section formed due to the limited slope distance and slope ratio.

[0009] In one embodiment, it further comprises a cap beam arranged on the top of the anti-slide pile, wherein the cap beam is flush with the top of the retaining plate. Through this embodiment, the overall force bearing capacity of the anti-slide pile connected to the retaining plate is improved.

[0010] In one embodiment, one side of the crown beam is further provided with an eave extending in a direction away from the anti-slip pile, and the bottom of the eave is provided with an inwardly recessed drip groove. Through this embodiment, the provided eaves and drip groove can effectively prevent the air-facing section of the anti-slip pile from being soaked by rainwater.

[0011] In one embodiment, the middle section of the retaining plate is further provided with a plurality of drainage holes arranged in sequence in the vertical direction, and a gravel filter layer and a drainage pipe buried in the gravel filter layer are provided on one side of the retaining plate close to the fill slope, and the drainage pipe is connected with the drainage holes to form a drainage channel. Through this embodiment, the slope can be drained, the force of the slope on the retaining structure is reduced, and the stability of the retaining structure is improved.

[0012] In one embodiment, protective fences are also provided around the crown beam.

[0013] In one embodiment, a mortar protection cap is further provided on a side of the embedded reinforcement away from the anti-sliding column, and the mortar protection cap is wrapped around the thread and in contact with the retaining plate.

[0014] In one embodiment, there is a gap between two adjacent prefabricated sub-panels, and the gap is filled with asphalt hemp to provide flexible connection between the two adjacent prefabricated sub-panels.

[0015] The beneficial effects of the present invention are:

[0016] (1) The anti-slide piles, retaining plates and reinforced strips buried in the fill slope can meet the stability coefficient requirements of the fill slope to form a vertical air section when the slope distance and slope ratio are limited. The enlarged concrete lock mouth set at the height of the original soil layer is convenient for the installation of anti-slide piles and other modules. At the same time, the mechanically bored round piles are used to facilitate the integral molding of the anti-slide piles, avoid leaving construction joints, and solve the problem of repeated collapse of the anti-slide piles when they pass through the thick and soft soil layer rich in water.

[0017] (2) The retaining wall is composed of multiple prefabricated sub-walls, which can be pre-processed in the factory to shorten the on-site construction time. At the same time, after completing the connection construction of a section of prefabricated sub-walls and anti-slide piles, the reinforcement strips can be constructed in the fill slope corresponding to the section, realizing the cross-construction of fill and retaining wall installation, greatly improving the construction efficiency, and effectively avoiding the operation risks of on-site casting of retaining walls in the vertical air-facing section formed due to the limited slope distance and slope ratio;

[0018] (3) The drainage holes on the retaining plate are connected to the drainage pipes in the fill slope to form a drainage channel to facilitate the drainage of the slope, reduce the force of the slope on the retaining structure, and improve the stability of the retaining structure; BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings, wherein:

[0020] Figure 1 A schematic structural diagram of an embodiment of the present invention is shown;

[0021] Figure 2 A schematic diagram showing the structure of the connection between the anti-sliding column and the prefabricated sub-plate body of the present invention;

[0022] Figure 3 A schematic diagram showing the structure of the connection between the embedded reinforcement and the retaining plate of the present invention is shown;

[0023] Figure 4 A schematic diagram showing the connection structure of two adjacent prefabricated sub-panels of the present invention is shown;

[0024] Figure 5 A schematic diagram showing the structure of the crown beam of the present invention is shown;

[0025] Figure 6 A schematic diagram showing the cross-sectional structure of the retaining plate of the present invention is shown;

[0026] In the drawings, like reference numerals are used for like parts. The drawings are not necessarily to scale.

[0027] Reference numerals:

[0028] 1-fill slope, 2-reinforcement strip, 3-anti-slide pile, 4-retaining board, 5-crown beam, 6-prefabricated sub-board, 7-embedded reinforcement, 8-mortar protective cap, 9-asphalt hemp fiber, 10-eaves, 11 drip groove, 12-drain hole. DETAILED DESCRIPTION

[0029] The present invention will be further described below in conjunction with the accompanying drawings.

[0030] In a substation project, due to the limited site of the converter station, the fill slope is close to the river, the bottom of the fill slope is in a water-rich area all year round and covered with a thick soft soil layer. The fill slope is easy to slide through the soft soil layer. The slope distance and slope ratio are limited. The fill slope needs to be retracted to form a vertical air-facing section. The conventional fill slope retaining structure and support method are difficult to meet the stability coefficient requirements of the fill slope.

[0031] The present invention provides a retaining structure for a fill slope 1 adjacent to a river channel, such as Figure 1 As shown, it includes a multi-layer reinforcement strip 2 buried in the fill slope 1 and a plurality of mechanically bored round piles arranged side by side along the flow direction of the river. The plurality of mechanically bored round piles are arranged near the bottom of the fill slope 1. The mechanically bored round piles are provided with steel casings that pass through the water-rich soil layer and protrude from the original soil layer to form anti-sliding piles 3;

[0032] Among them, a plurality of anti-sliding piles 3 are connected to the retaining plate 4 through the embedded steel bar 7, the retaining plate 4 is in contact with one side of the reinforcement strip 2, the retaining plate 4 is arranged at the air section of the anti-sliding pile 3 close to the sliding surface of the fill slope 1, and a steel cage formed by threaded segmented splicing is also arranged in the steel casing, and the anti-sliding pile 3 is provided with a concrete enlarged lock mouth at the height of the original soil layer for the anti-sliding pile 3 to be integrally formed;

[0033] It should be noted that, by means of the anti-sliding piles 3, retaining plates 4 and the reinforced strips 2 buried in the fill slope 1, the stability coefficient requirement of the fill slope 1 to be retracted to form a vertical air section when the slope release distance and slope ratio are limited is met. The enlarged concrete lock provided at the height of the original soil layer is convenient for the installation of the anti-sliding piles 3 and other modules. At the same time, the mechanically bored round piles are used to facilitate the integral molding of the anti-sliding piles 3, avoid leaving construction joints, and solve the problem of repeated hole collapse of the anti-sliding piles 3 when they pass through the thick and soft soil layer rich in water.

[0034] In one embodiment, a steel cage formed by threaded segments is also provided inside the steel casing to reinforce the anti-sliding pile 3;

[0035] In one embodiment, Figure 2 As shown, the retaining plate 4 is composed of a plurality of prefabricated sub-plate bodies 6, and the prefabricated sub-plate bodies 6 are connected to the anti-sliding piles 3 through the embedded steel bars 7 anchored in the anti-sliding piles 3 in the horizontal direction, and the embedded steel bars 7 penetrate the prefabricated sub-plate bodies 6, and are also provided with threads for fixing the prefabricated sub-plate bodies 6;

[0036] It should be noted that the retaining plate 4 is composed of a plurality of prefabricated sub-plate bodies 6, which can be pre-processed in the factory to shorten the on-site construction time. At the same time, during the construction, after completing the connection between a section of the prefabricated sub-plate body 6 and the anti-sliding pile 3, the reinforcement strip 2 can be constructed in the fill slope 1 corresponding to the position of the section, thereby realizing the cross-construction operation of filling and retaining plate 4 installation, greatly improving the construction efficiency, reducing the capital construction cost, and effectively avoiding the operation risk of on-site casting of the retaining plate 4 in the vertical air section formed due to the limitation of the slope release distance and slope ratio;

[0037] Furthermore, if Figure 3 As shown, a mortar protection cap 8 is also provided on the side of the anchor bar 7 away from the anti-sliding column. The mortar protection cap 8 is wrapped around the thread and in contact with the retaining plate. Figure 4 As shown, there is a gap between two adjacent prefabricated sub-board bodies 6, and the gap is filled with asphalt hemp 9, so that the two adjacent prefabricated sub-board bodies 6 can be flexibly connected, that is, the prefabricated sub-board bodies 6 are used to form the retaining plate 4 and when the retaining plate 4 is connected to the anti-sliding piles 3, the stability of the retaining structure is improved;

[0038] In one embodiment, Figure 1 and Figure 2 As shown, it also includes a cap beam 5 arranged on the top of the anti-sliding pile 3, and the cap beam 5 is flush with the top of the retaining plate 4, so as to improve the overall force bearing capacity of the anti-sliding pile 3 connected to the retaining plate 4;

[0039] Furthermore, if Figure 5 As shown, one side of the crown beam 5 is also provided with an overhanging eave 10 extending in a direction away from the anti-slip pile 3, and the bottom of the overhanging eave 10 is provided with an inwardly recessed drip groove 11, that is, the overhanging eave 10 and the drip groove 11 can effectively prevent the air section of the anti-slip pile 3 from being soaked by rainwater, thereby improving the stability of the retaining structure;

[0040] In one embodiment, Figure 6 As shown, the middle section of the retaining plate 4 is also provided with a plurality of drainage holes 12 arranged in sequence in the vertical direction, and a crushed stone filter layer and a drainage pipe buried in the crushed stone filter layer are provided on one side of the retaining plate 4 close to the fill slope 1, and the drainage pipe is connected with the drainage holes to form a drainage channel, so as to facilitate the drainage of the slope, reduce the force of the slope on the retaining structure, and improve the stability of the retaining structure;

[0041] In one embodiment, protective fences are also provided around the crown beam 5 to ensure the safety of operators during the later operation and maintenance process;

[0042] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "bottom", "top", "front", "back", "inside", "outside", "left", "right", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying 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 a limitation on the present invention.

[0043] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. It should therefore be understood that many modifications may be made to the exemplary embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the various dependent claims and features described herein may be combined in a manner different from that described in the original claims. It should also be understood that features described in conjunction with individual embodiments may be used in other described embodiments.

Claims

1. A fill slope retaining structure suitable for use near a river channel, characterized in that: It includes a multi-layer reinforced strip buried in the fill slope and a plurality of mechanically bored round piles arranged side by side along the river flow direction, wherein the plurality of mechanically bored round piles are arranged near the bottom of the fill slope, and a steel casing is arranged in the mechanically bored round piles, which passes through the water-rich soil layer and protrudes out of the original soil layer, so as to form an anti-sliding pile; Among them, multiple anti-sliding piles are connected to the retaining board through embedded reinforcement, the retaining board is in contact with one side of the reinforcement strip, the retaining board is arranged in the air section of the anti-sliding pile close to the sliding surface of the fill slope, and the steel casing is also provided with a steel cage formed by threaded segments. The anti-sliding pile is located at the height of the original soil layer and is provided with a concrete enlarged lock mouth for the anti-sliding pile to be formed in one piece.

2. The fill slope retaining structure suitable for a river channel according to claim 1, characterized in that: A steel cage formed by threaded segments is also arranged inside the steel casing.

3. The fill slope retaining structure suitable for a river channel according to claim 1, characterized in that: The retaining plate is composed of a plurality of prefabricated sub-plate bodies, and the prefabricated sub-plate bodies are connected to the anti-slip piles through embedded steel bars anchored in the anti-slip piles in the horizontal direction. The embedded steel bars penetrate the prefabricated sub-plate bodies and are also provided with threads for fixing the prefabricated sub-plate bodies.

4. The fill slope retaining structure suitable for use near a river channel according to claim 1, characterized in that: It also includes a cap beam arranged on the top of the anti-slide pile, and the cap beam is flush with the top of the retaining plate.

5. The fill slope retaining structure suitable for a river channel according to claim 4, characterized in that: One side of the crown beam is also provided with an overhanging eave extending in a direction away from the anti-slip pile, and the bottom of the overhanging eave is provided with an inwardly recessed drip groove.

6. The fill slope retaining structure suitable for a river channel according to claim 1, characterized in that: The middle section of the retaining plate is also provided with a plurality of drainage holes arranged in sequence in the vertical direction. A gravel filter layer and a drainage pipe buried in the gravel filter layer are provided on one side of the retaining plate close to the fill slope. The drainage pipe is connected with the drainage holes to form a drainage channel.

7. The fill slope retaining structure suitable for use near a river channel according to claim 4, characterized in that: Protective fences are also arranged around the crown beam.

8. The fill slope retaining structure suitable for use near a river channel according to claim 3, characterized in that: A mortar protection cap is also provided on a side of the embedded reinforcement away from the anti-sliding column. The mortar protection cap is wrapped on the thread and in contact with the retaining plate.

9. The fill slope retaining structure suitable for use near a river channel according to claim 3, characterized in that: There is a gap between two adjacent prefabricated sub-board bodies, and the gap is filled with asphalt hemp fibers to provide flexible connection for the two adjacent prefabricated sub-board bodies.

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