Bank slope protection structure

Abstract

The utility model discloses a bank slope protection structure, belongs to the field of slope protection, and aims to deepen an anti-scouring range and reduce construction safety risks at the same time. Comprising a bank protection wall arranged at the toe of a bank slope, a solid protection slope which is distributed at the top of the bank protection wall and obliquely and upwards extends to the slope surface of the bank slope, and an anti-impact secant pile which longitudinally extends along the bank slope; the top ends of the anti-impact secant piles are connected with reinforcing steel bars of the bank protection wall. According to the bank slope protection structure, the anti-scour secant piles are arranged in the bank slope, the anti-scour depth range can be effectively widened, and the bank slope protection structure is suitable for sections with the large scour depth. When an anti-impact secant pile is constructed, mechanical construction can be adopted, for example, a rotary drilling rig is adopted for hole forming of the secant pile, and a temporary steel casing is adopted for wall protection during hole forming. And after the hole is formed, elements such as hole position deviation and pile hole perpendicularity are checked again. Empty soil in the hole and sediment at the bottom of the hole are removed before concrete is poured, the bottom of the hole is compacted, and the steel casing is lifted section by section along with concrete pouring during concrete pouring. And compared with excavation of a deep foundation pit, the construction safety is relatively low.

Description

Technical Field

[0001] The utility model belongs to the field of slope protection, specifically the bank slope protection structure. Background Art

[0002] Due to the influence of scouring, many shallow collapses occur on the river bank slope. To ensure the stability of the bank slope, an anti-scouring wall is usually set up for bank slope protection. However, for a bank slope with a relatively deep scouring depth, if a conventional anti-scouring wall is adopted, in order to ensure the embedment depth of the retaining wall, the size of the anti-scouring wall will be very large, and a deep foundation pit needs to be excavated, resulting in a relatively high construction safety risk. Content of the Utility Model

[0003] The purpose of the utility model is to provide a bank slope protection structure, which can deepen the anti-scouring range while reducing the construction safety risk.

[0004] The technical scheme adopted by the utility model is as follows: the bank slope protection structure includes a revetment wall arranged at the foot of the bank slope, a solid slope protection extending obliquely upward from the top of the revetment wall to the slope surface of the bank slope, and an anti-scouring interlocking pile extending longitudinally along the bank slope; the top end of the anti-scouring interlocking pile is connected with the steel bars of the revetment wall.

[0005] Further, the anti-scouring interlocking pile longitudinally along the bank slope includes N reinforced concrete piles, and M plain concrete piles are arranged between two adjacent reinforced concrete piles, where N≥2; M≥1.

[0006] Further, the interlocking width between two adjacent concrete piles is 20mm.

[0007] Further, a riprap revetment is arranged outside the revetment wall.

[0008] Further, the end face of the riprap revetment is in an isosceles triangle shape.

[0009] Further, a backfill area is formed by surrounding the inner wall of the revetment wall, the inner wall of the solid slope protection and the slope surface of the bank slope, and the backfill area is filled with crushed stones to form a backfill crushed stone layer.

[0010] The beneficial effect of the utility model is as follows: for the bank slope protection structure disclosed by the utility model, the anti-scouring interlocking pile is arranged in the bank slope, which can effectively deepen the anti-scouring depth range and is applicable to the sections with a relatively deep scouring depth. When constructing the anti-scouring interlocking pile, mechanical construction can be adopted. For example, the interlocking pile is formed by a rotary drilling rig, and a temporary steel casing is used for shaft protection during hole formation. After hole formation, the hole position deviation and the pile hole verticality and other elements are first rechecked. Before pouring concrete, the virtual soil and the bottom sediment in the hole are removed, and the bottom of the hole is tamped. When pouring concrete, the steel casing is gradually lifted along with the pouring of concrete. Compared with excavating a deep foundation pit, the construction safety is relatively low. Description of the Drawings

[0011] Figure 1 It is the front view of the utility model;

[0012] Figure 2 This is the left view of the impact - resistant secant pile of the present utility model.

[0013] In the figure, there are a revetment wall 1, a solid slope protection 2, an impact - resistant secant pile 3, a reinforced concrete pile 31, a plain concrete pile 32, a riprap revetment 4, and a backfilled crushed stone layer 5. Specific implementation manners

[0014] The following further explains the present utility model with reference to the accompanying drawings as follows:

[0015] The bank slope protection structure, such as Figure 1 shown, includes a revetment wall 1 arranged at the foot of the bank slope, a solid slope protection 2 extending obliquely upward from the top of the revetment wall 1 to the slope surface of the bank slope, and an impact - resistant secant pile 3 extending longitudinally along the bank slope; the top end of the impact - resistant secant pile 3 is connected to the steel bars of the revetment wall 1, and the impact - resistant secant pile 3 and the revetment wall 1 are cast integrally.

[0016] Among them, the revetment wall 1 is C20 rubble concrete, and its function is to prevent the river from scouring the foot of the bank slope, and its base is placed not less than 1 m below the local scouring line.

[0017] The setting of the solid slope protection 2 is determined according to the situation of the bank slope. If it is too steep, it is not conducive to structural safety. If the slope of the bank slope is relatively gentle, the solid slope protection can be set to fit the slope surface. The solid slope protection 2 is C20 rubble concrete, and its function is to prevent the flood from scouring the slope surface of the bank slope, and its setting height is at least 1 m higher than the design flood level.

[0018] The bank slope protection structure disclosed by the present utility model uses an impact - resistant secant pile 3 arranged in the bank slope, which can effectively deepen the anti - scouring depth range and is applicable to the sections with deeper scouring depth. When constructing the impact - resistant secant pile 3, mechanical construction can be adopted. For example, when forming the hole for the secant pile, a rotary drilling rig can be used, and a temporary steel casing is used for shaft protection during hole formation. After hole formation, the hole position deviation and the verticality of the pile hole are first checked. Before pouring concrete, the loose soil in the hole and the sediment at the bottom of the hole are removed, and the bottom of the hole is tamped. When pouring concrete, the steel casing is gradually lifted along with the pouring of concrete. Compared with excavating a deep foundation pit, the construction safety is relatively low.

[0019] In order to ensure the anti - scouring ability of the impact - resistant secant pile 3 and save costs at the same time. Preferably, as Figure 2As shown in the figure, the anti-scour biting pile 3 longitudinally along the slope includes N reinforced concrete piles 31, and M plain concrete piles 32 are arranged between two adjacent reinforced concrete piles 31, where N≥2 and M≥1. The reinforced concrete piles 31 and the plain concrete piles 32 can be arranged at intervals. In this embodiment, the diameter of the reinforced concrete pile 31 is 0.8m, the diameter of the plain concrete pile 32 is 0.8m, the spacing between two adjacent reinforced concrete piles 31 is 3.6m, five plain concrete piles 32 are bitten between two adjacent reinforced concrete piles 31, the pile spacing of the plain concrete piles 32 is 60cm, and the biting width between piles is 20cm. The initial setting time of the plain concrete pile 32 is greater than 60h, and the coarse aggregate of the concrete should be as small as possible, not greater than 20mm.

[0020] Before the construction of the anti-scour biting pile 3, a special construction plan should be prepared first, the construction process organization should be strengthened, the biting quality of the pile body should be ensured, and the supplementary pile should be avoided due to the incomplete biting of the pile body. Before excavation, on-site lofting should be carried out first, and the pile position and the elevation of the ground line can be verified before the pile well excavation. The anti-scour biting pile 3 is formed by a rotary drilling rig. During the hole formation, a temporary steel casing is used for shaft protection. After the hole formation, the hole position deviation and the pile hole verticality and other elements should be rechecked first. Before pouring concrete, the virtual soil in the hole and the sediment at the bottom of the hole should be removed, and the bottom of the hole should be tamped. When pouring concrete, the steel casing should be gradually lifted along with the concrete pouring. The adjacent biting piles should be constructed in the order of first constructing the plain concrete pile 32 and then the reinforced concrete pile 31; the reinforced concrete pile 31 should form an interlocking with the plain concrete pile 32 by cutting part of the pile body of the plain concrete pile 32 during the hole formation before the initial setting of the plain concrete pile 32, but the premature cutting should be avoided.

[0021] In order to further improve the anti-scour performance of the slope toe, a riprap revetment 4 is arranged outside the revetment wall 1. The end face of the riprap revetment 4 is in an isosceles triangle shape. The isosceles triangle structure has good stability. By stacking larger riprap outside the revetment wall, the ability of the river bank to resist scouring and downcutting is enhanced.

[0022] A backfill area is formed by enclosing the inner wall of the revetment wall 1, the inner wall of the solid revetment 2 and the slope of the bank slope, and the backfill area is filled with gravel to form a backfill gravel layer 5.

Claims

1. The slope protection structure is characterized by: The invention comprises a revetment wall (1) arranged at the foot of a bank slope, a solid revetment (2) extending obliquely upward from the top of the revetment wall (1) to the surface of the bank slope, and an anti-collision bite pile (3) extending longitudinally along the bank slope; the top of the anti-collision bite pile (3) is connected to the steel bars of the revetment wall (1), and the anti-collision bite pile (3) and the revetment wall (1) are cast as one; the revetment wall (1) and the solid revetment (2) are cast as one; the anti-collision bite pile (3) is arranged in the bank slope, and the base of the revetment wall (1) is placed below the local scour line and is not less than 1m.

2. The slope protection structure according to claim 1, characterized in that: The anti-collision interlocking piles (3) include N reinforced concrete piles (31) along the longitudinal direction of the bank slope, and M plain concrete piles (32) are arranged between two adjacent reinforced concrete piles (31), where N≥2; and M≥1.

3. The slope protection structure according to claim 2, characterized in that: The bite width between two adjacent concrete piles is 20mm.

4. The slope protection structure according to any one of claims 1 to 3, characterized in that: A boulder revetment (4) is arranged outside the revetment wall (1).

5. The slope protection structure according to claim 4, characterized in that: The end surface of the boulder revetment (4) is in the shape of an isosceles triangle.

6. The slope protection structure according to any one of claims 1 to 3, characterized in that: A backfill area is formed by the inner wall of the revetment wall (1), the inner wall of the solid slope protection (2) and the slope surface of the bank, and the backfill area is filled with crushed stones to form a backfill crushed stone layer (5).

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