River channel reinforcing structure suitable for soft foundation
By setting up a rock-throwing silt layer in the river channel and setting up foot and bottom support at the bottom of the river slope, the problem of weak foundation treatment in river channel management is solved, and the effect of reducing environmental impact and improving the stability of river slope is achieved.
Patent Information
- Application Number
- CN202421613115.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-09
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-07-09
AI Technical Summary
In river management projects, it is difficult for the existing technology to effectively deal with weak foundations, especially to ensure river slope stability while avoiding large-scale excavation and filling and reducing the impact on the surrounding environment.
The structure is reinforced by a rock-throwing and silt layer, including setting up a rock-throwing and silt layer on the weak soil layer, mixing silt and stones into the layer, and setting up foot and river bottom support at the bottom of the river slope to fill the backfilling gravel, and laying concrete pressing plates and slope protection nets on the slope to reinforce the river slope.
By reducing the amount of silt and flowing sand cleaning, reducing labor and material investment, improving the bearing capacity of silt and flowing sand foundations, ensuring the stability of river slopes, avoiding slope instability, and improving the stability of the entire river channel.
Smart Images
Figure CN222822159U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of river channel foundation treatment, in particular to a river channel reinforcement structure suitable for soft foundations. Background Art
[0002] Silt and silt-quality soil sections are often encountered in the construction of river channel regulation projects. The commonly used soft foundation treatment methods in water conservancy projects have their own advantages and disadvantages, which are briefly described as follows:
[0003] (1) Replacement method: that is, the soft soil with low bearing capacity of the base is excavated and replaced with sand or harder sandy soil. According to general experience, the replacement thickness should not exceed 3m. However, river channel regulation projects generally have high pressure water, poor stability of temporary slopes after excavation, and difficult replacement construction. In addition, the replacement volume is large. For plain lake areas that lack high-quality fillers, this method is not applicable. At the same time, for urban rivers, if all soft foundation layers such as silt and silty soil are removed, it will cause safety hazards to the foundations of surrounding houses.
[0004] (2) Cement mixing pile method: This method is an ideal method for treating soft soil foundations. Its main principle is to use cement as the main agent of the curing agent. Through a special deep mixing machine, the soft soil and the curing agent are forcibly mixed deep in the foundation, so that the curing agent and the soft soil produce a series of physical and chemical reactions, so that the soft soil forms a hard and integral foundation. This method is not only used to improve the bearing capacity of the foundation and reduce settlement, but also can prevent seepage and improve the stability of the slope. Under the premise of not requiring a large increase in the bearing capacity of the foundation, it is a better foundation treatment method. However, this method is expensive and takes a long time to construct. Summary of the invention
[0005] The technical problem to be solved by the utility model is to provide a river channel reinforcement structure suitable for soft foundations, avoiding large-scale excavation and filling, reducing the impact on the surrounding environment, and effectively ensuring the stability of the river channel slope.
[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is: a river channel reinforcement structure suitable for soft foundations, including a riprap silt-squeezing layer arranged on the upper side of the soft soil layer in the river channel, the riprap silt-squeezing layer includes silt and stones, and a stabilizer is provided at the bottom of the river channel slope, the stabilizer is arranged along the length direction of the river channel, a plurality of river bottom supports are provided between two groups of stabilizers, and backfill gravel is filled between the river bottom supports, and the stabilizer, river bottom supports and backfill gravel are arranged on the upper side of the riprap silt-squeezing layer.
[0007] In a preferred solution, a number of concrete press plates are laid on the river channel slope, and the concrete press plates are laid crosswise to form a grid structure.
[0008] In a preferred solution, the concrete pressure plate is provided with a plurality of through holes for anchor rods to pass through, and the anchor rods are inserted into the river channel slope to fix the concrete pressure plate.
[0009] In a preferred solution, a slope protection net is laid on the river channel slope, and the slope protection net is arranged in a grid structure laid by a concrete pressure plate.
[0010] In a preferred solution, a concrete cap is provided on the top of the river channel slope.
[0011] The utility model provides a river channel reinforcement structure suitable for soft foundations, which has the following beneficial effects:
[0012] 1. Squeeze and backfill the stones into the silt and quicksand layers to form a riprap silt layer, which not only reduces the amount of silt and quicksand to be cleaned, reduces the input of labor and materials, but also utilizes the characteristics of the silt and quicksand layers themselves to increase the bonding properties between stones, forming a firm and stable whole, and improving the bearing capacity of the treated silt and quicksand foundation.
[0013] 2. By setting up anchors and riverbed supports and filling and backfilling gravel, a stable support is formed for the riverbed.
[0014] 3. By setting up structures such as concrete pressure plates and slope protection nets, the river bank can be protected and reinforced to avoid slope instability and improve the stability of the entire river. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments:
[0016] Figure 1 It is a cross-sectional view of the utility model;
[0017] Figure 2 A plan view of the bottom of the river channel of the present utility model;
[0018] Figure 3 This is the layout plan of the concrete slab;
[0019] In the figure: soft soil layer 1, riprap layer 2, river slope 3, anchor 4, river bottom support 5, backfill gravel 6, concrete pressure plate 7, anchor rod 8, slope protection net 9, concrete top 10. DETAILED DESCRIPTION
[0020] Embodiment 1:
[0021] like Figure 1~2 As shown, a river channel reinforcement structure suitable for soft foundation includes a riprap layer 2 arranged on the upper side of a soft soil layer 1 in the river channel. The riprap layer 2 includes silt and stones and is formed by riprap in the silt of the soft soil layer. The characteristic value of the foundation bearing capacity after treatment is not less than 100 kPa. The thickness is generally not less than 1 m. Non-weatherable stones such as flakes and blocks should be used for riprap, and the diameter of the stone should be not less than 30 cm.
[0022] A footing 4 is provided at the bottom of the river channel slope 3, and the footing 4 is arranged along the length direction of the river channel, and its height h2 is not less than 50cm. Depending on the situation, gabion stone cages, mortar-laid stone concrete or reinforced concrete structures can be used.
[0023] A number of river bottom supports 5 are arranged between the two groups of anchoring feet 4. The river bottom supports 5 are arranged perpendicular to the water flow direction. The river bottom supports 5 are constructed by pouring concrete. The river bottom supports 5 should be reliably connected to the anchoring feet 4. When the anchoring feet 4 are of reinforced concrete structure, the river bottom supports 5 should be poured integrally with the anchoring feet 4.
[0024] The riverbed supports 5 are filled with backfilled gravel 6, the top of which is flush with the top of the stabilizing foot 4 and the riverbed supports 5, and is compacted by rolling. The stabilizing foot 4, the riverbed supports 5 and the backfilled gravel 6 are arranged on the upper side of the riprap layer 2.
[0025] The construction process of the river channel reinforcement structure is as follows:
[0026] 1) First, remove the silt deposited on the riverbed to expose soft soil layers such as silt and muddy soil1.
[0027] 2) For soft soil layers such as silt and silty soil, stone throwing and silt removal treatment shall be carried out. The characteristic value of foundation bearing capacity after treatment shall not be less than 100kPa.
[0028] 3) Anchor feet 4 are arranged at the bottom of the river slope along the direction of the water flow, and river bottom supports 5 are evenly arranged in a direction perpendicular to the anchor feet 4 to ensure the stability of the river bottom.
[0029] 4) Fill the frame formed by the footing 4 and the riverbed support 5 with gravel 6 to protect the riverbed;
[0030] 5) Clean, level and compact the riverside slopes.
[0031] The reinforcement structure replaces the original foundation structure formed by the replacement construction, and squeezes and backfills the stones into the silt and quicksand layers, so that the stones are integrated with the silt and quicksand layers, which not only reduces the amount of silt and quicksand to be cleaned, and reduces the input of labor and materials, but also can utilize the characteristics of the silt and quicksand layers themselves to increase the bonding performance between the stones, forming a firm and stable whole, and improving the bearing capacity of the treated silt and quicksand foundation; by setting the anchor 4 and the riverbed support 5, and filling and backfilling the crushed stone 6, a stable support is formed for the riverbed.
[0032] Embodiment 2:
[0033] Different from Example 1, Figure 2 and 3As shown, a plurality of concrete plates 7 are laid on the river slope 3, and the concrete plates 7 are laid crosswise to form a grid structure. The concrete plates 7 are prefabricated concrete plates, and the river slope 3 can be reinforced by setting the concrete plates 7 to prevent the slope from becoming unstable.
[0034] During specific use, the concrete pressure plate 7 is provided with a plurality of through holes for the anchor rods 8 to pass through, and a hook is provided at the upper end of the anchor rod 8 to form a limiting portion. The anchor rod 8 is inserted into the river slope 3 to fix the concrete pressure plate 7, thereby further improving stability.
[0035] Preferably, a slope protection net 9 is laid on the river slope 3, and the slope protection net 9 is a wire mesh. The slope protection net 9 is arranged in a grid structure laid by a concrete pressure plate 7. When used, the slope protection net 9 can be pressed on the lower side of the concrete pressure plate 7, and the concrete pressure plate 7 fixes the slope protection net 9. By setting the slope protection net 9, on the one hand, the slope is protected, and on the other hand, it does not affect the planting of slope vegetation.
[0036] A concrete capping 10 is provided on the top of the river channel slope 3, the size of which is not less than 30 cm×40 cm, and the top of the concrete capping 10 is flush with the top of the river channel.
[0037] By providing structures such as the concrete pressure plate 7 and the slope protection net 9, the river channel slope protection can be protected and reinforced to avoid soil erosion and improve the stability of the entire river channel.
Claims
1. A river channel reinforcement structure suitable for soft foundation, characterized by: The invention comprises a riprap silt-squeezing layer (2) arranged on the upper side of a weak soil layer (1) in a river channel, the riprap silt-squeezing layer (2) comprising silt and stones, a stabilizing footing (4) is arranged at the bottom of a river channel slope (3), the stabilizing footing (4) is arranged along the length direction of the river channel, a plurality of river bottom supports (5) are arranged between two groups of stabilizing footings (4), backfill gravel (6) is filled between the river bottom supports (5), and the stabilizing footings (4), the river bottom supports (5) and the backfill gravel (6) are arranged on the upper side of the riprap silt-squeezing layer (2).
2. A river channel reinforcement structure suitable for soft foundation according to claim 1, characterized in that: A plurality of concrete press plates (7) are laid on the river channel slope (3), and the concrete press plates (7) are laid crosswise to form a grid structure.
3. A river channel reinforcement structure suitable for soft foundation according to claim 2, characterized in that: The concrete pressure plate (7) is provided with a plurality of through holes for anchor rods (8) to pass through, and the anchor rods (8) are inserted into the river channel slope (3) to fix the concrete pressure plate (7).
4. A river channel reinforcement structure suitable for soft foundation according to claim 2, characterized in that: A slope protection net (9) is laid on the river channel slope (3), and the slope protection net (9) is arranged in a grid structure laid on the concrete pressure plate (7).
5. The river channel reinforcement structure suitable for soft foundation according to claim 1, characterized in that: A concrete capping (10) is provided on the top of the river channel slope (3).