Foundation replacing and filling structure for coastal sludge area

Abstract

The utility model discloses a coastal silt area foundation replacement filling structure which comprises a silt foundation and an embankment structure, a foundation pit is arranged on the silt foundation, a bottom clay layer is arranged at the bottom of the foundation pit, a protection plate is arranged on the side wall of the foundation pit, a stone cushion layer is arranged in the foundation pit above the bottom clay layer, and the stone cushion layer is arranged in the foundation pit above the bottom clay layer. The inner pit is arranged on the stone cushion layer, the compacted clay layer is arranged on the surface of the inner wall of the inner pit, the prefabricated slab is laid on the compacted clay layer, the sea sand layer is arranged at the bottom of the inner side of the prefabricated slab, the pebble cushion layer is arranged on the sea sand layer, and the fine sand layer is laid on the pebble cushion layer. According to the coastal silt area foundation replacement and filling structure, the novel structural design is adopted, a soft soil layer of a coastal silt area is replaced through cooperation of a multi-layer positioning structure and a waterproof material with a high-stability material, the whole foundation structure is stable, water seepage and sedimentation are not prone to occurring, and long-time stability of an embankment structure is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of foundation replacement, in particular to a foundation replacement structure in a coastal mud area. Background Art

[0002] Due to long-term erosion by seawater and tidal effects, the soil in coastal silt areas often has the characteristics of high water content, high compressibility, and low strength. These characteristics make the foundation bearing capacity insufficient and difficult to meet the needs of engineering construction. Therefore, replacing the soft soil layer with materials with higher strength and better stability through foundation replacement is an important measure to improve the foundation bearing capacity and ensure the safety of the project.

[0003] Existing foundation replacement structures in coastal mud areas, such as the Chinese utility model patent entitled A Foundation Replacement Structure in Coastal Mud Area with publication number CN219240167U, include a gravel cushion layer below the ground, an embankment structure above the ground, and a tie-net structure between the gravel cushion layer and the embankment structure, wherein the tie-net structure partially extends into the gravel cushion layer; the tie-net structure includes a tie-net layer laid flat on the gravel cushion layer, connecting ropes tied to the tie-net layer and extending into the gravel cushion layer, and tie-net ropes arranged at intervals along the distribution direction of the connecting ropes, wherein the tie-net ropes are laid horizontally in the gravel cushion layer. The overall structure of this patent solution is simple, and it does not take into account the fact that the foundation in coastal mud areas has a high water content, a high salinity of the water body, and is prone to sedimentation. Therefore, it is necessary to design a foundation replacement structure in coastal mud areas to address the above-mentioned problems. Utility Model Content

[0004] The purpose of the utility model is to provide a foundation replacement structure in a coastal mud area to solve the problem that the existing foundation replacement structure in a coastal mud area proposed in the above background technology does not take into account the high water content of the foundation in the coastal mud area, the high salinity of the water body, and the easy sedimentation.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a foundation replacement structure in a coastal silt area, comprising a silt foundation and an embankment structure, a foundation pit is arranged on the silt foundation, a bottom clay layer is arranged at the bottom of the foundation pit, a protective plate is arranged on the side wall of the foundation pit, a stone cushion layer is arranged in the foundation pit above the bottom clay layer, an inner pit is arranged on the stone cushion layer, a compacted clay layer is arranged on the inner wall surface of the inner pit, a prefabricated board is laid on the compacted clay layer, a sea sand layer is arranged on the inner bottom of the prefabricated board, a pebble cushion layer is arranged on the sea sand layer, a fine sand layer is laid on the pebble cushion layer, a concrete leveling layer is arranged on the fine sand layer, and an embankment structure is arranged on the top of the concrete leveling layer.

[0006] Preferably, the protective plates are symmetrically distributed about the center of the embankment structure, and the front view shape of the protective plates is a "T" shape.

[0007] Preferably, the protection plate is fixedly mounted with embedded columns on the bottom surface of the side away from the embankment structure, and an anti-sinking rod is fixedly mounted on the embedded columns.

[0008] Preferably, the anti-sinking rods are distributed on the embedded columns at equal angles about the center of the embedded columns, and the embedded columns are distributed at equal intervals.

[0009] Preferably, the outer side of the stone cushion layer, the compacted clay layer and the top end of the prefabricated plate are all in contact with the vertical portion of the protective plate, and the bottom end of the protective plate is lower than the bottom end of the bottom clay layer.

[0010] Preferably, the thickness of the compacted clay layer is not less than half the thickness of the bottom clay layer, and the width of the bottom clay layer is equal to the width of the foundation pit.

[0011] Preferably, the top surface of the concrete leveling layer and the top surface of the precast slab are on the same horizontal plane, and the thickness of the concrete leveling layer is greater than 3 times the thickness of the precast slab.

[0012] Compared with the prior art, the utility model has the following beneficial effects: the foundation replacement structure in the coastal silt area adopts a new structural design, and replaces the soft soil layer in the coastal silt area through a multi-layer positioning structure and waterproof materials combined with high-stability materials, so that the overall foundation structure is stable, not easy to seep water and settle, and the long-term stability of the embankment structure is ensured;

[0013] The soft soil layer in the coastal mud area is isolated by protective plates and bottom clay layers, and waterproofing is performed on the outside. The inner side is waterproofed and supported as a whole with stone cushions, compacted clay layers and prefabricated panels to prevent the inner structure of the prefabricated panels from being eroded by seawater.

[0014] By stacking sea sand layers, pebble cushion layers, fine sand layers and concrete leveling layers, a stable supporting foundation is provided for the embankment structure. In conjunction with the external structure, the structural strength of the overall foundation is guaranteed, the bearing capacity of the foundation is greatly improved, and the safety of the embankment project is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the front cross-sectional structure of the utility model;

[0016] Figure 2 It is a side view structural diagram of the protective plate, embedded column and anti-sinking rod of the utility model;

[0017] Figure 3 This is a schematic diagram of the top view of the structure of the embedded column and the anti-sinking rod of the utility model;

[0018] Figure 4 It is a schematic diagram of the three-dimensional structure of the prefabricated board of the utility model.

[0019] In the figure: 1. Silt foundation; 2. Foundation pit; 3. Bottom clay layer; 4. Protective plate; 5. Embedded column; 6. Anti-sinking rod; 7. Stone cushion layer; 8. Inner pit; 9. Compacted clay layer; 10. Precast plate; 11. Sea sand layer; 12. Pebble cushion layer; 13. Fine sand layer; 14. Concrete leveling layer; 15. Embankment structure. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-4 The utility model provides a technical solution: a foundation replacement structure in a coastal silt area, comprising a silt foundation 1, a foundation pit 2, a bottom clay layer 3, a protective plate 4, an embedded column 5, an anti-sinking rod 6, a stone cushion layer 7, an inner pit 8, a compacted clay layer 9, a prefabricated plate 10, a sea sand layer 11, a pebble cushion layer 12, a fine sand layer 13, a concrete leveling layer 14 and an embankment structure 15. The silt foundation 1 is provided with a foundation pit 2, the bottom of the foundation pit 2 is provided with a bottom clay layer 3, and the side wall of the foundation pit 2 is provided with an anti-sinking A guard plate 4, a stone cushion layer 7 is arranged in the foundation pit 2 above the bottom clay layer 3, an inner pit 8 is arranged on the stone cushion layer 7, a compacted clay layer 9 is arranged on the inner wall surface of the inner pit 8, a precast plate 10 is laid on the compacted clay layer 9, a sea sand layer 11 is arranged on the inner bottom of the precast plate 10, a pebble cushion layer 12 is arranged on the sea sand layer 11, a fine sand layer 13 is laid on the pebble cushion layer 12, a concrete leveling layer 14 is arranged on the fine sand layer 13, and a road embankment structure 15 is arranged on the top of the concrete leveling layer 14.

[0022] The protective plate 4 of this example is symmetrically distributed about the center of the embankment structure 15 , and the front view shape of the protective plate 4 is a "T" shape. The above structural design can reinforce both sides of the foundation pit 2 and the bottom of the embankment structure 15 .

[0023] The bottom surface of the protective plate 4 away from the embankment structure 15 is fixedly installed with an embedded column 5, and an anti-sinking rod 6 is fixedly installed on the embedded column 5. The above structural design increases the contact area between the outer bottom of the protective plate 4 and the silt foundation 1 to prevent the protective plate 4 from tilting.

[0024] The anti-sinking rods 6 are distributed at equal angles on the embedded columns 5 about the center of the embedded columns 5, and the embedded columns 5 are distributed at equal intervals. The above structural design ensures that the anti-sinking rods 6 and the embedded columns 5 are in stable contact with the silt foundation 1, and supports the outer side of the protective plate 4.

[0025] The outer side of the stone cushion layer 7 and the top ends of the compacted clay layer 9 and the prefabricated board 10 are all in contact with the vertical part of the protective plate 4, and the bottom end of the protective plate 4 is lower than the bottom end of the bottom clay layer 3. The above-mentioned structural design of the protective plate 4 and the bottom clay layer 3 can provide stable waterproof protection for the inner foundation structure.

[0026] The thickness of the compacted clay layer 9 is not less than half of the thickness of the bottom clay layer 3, and the width of the bottom clay layer 3 is equal to the width of the foundation pit 2. The above structural design can prevent seawater from seeping in from the bottom and provide stable support for the top structure.

[0027] The top surface of the concrete leveling layer 14 is on the same horizontal plane as the top surface of the precast slab 10 , and the thickness of the concrete leveling layer 14 is greater than 3 times the thickness of the precast slab 10 . The above structural design can stably support the embankment structure 15 and ensure the stability of the embankment structure 15 .

[0028] Working principle: Figure 1 The bottom clay layer 3 and the protective plate 4 in the silt foundation 1 block the seawater from the bottom and both sides. The compacted bottom clay layer 3 cooperates with the stone cushion layer 7 to stably support the inner structure, and cooperates with the compacted clay layer 9 and the prefabricated plate 10 to ensure that the inner pit 8 will not collapse as a whole, and perform secondary waterproofing. At the same time, the stability of the sea sand layer 11, the pebble cushion layer 12 and the fine sand layer 13 is guaranteed. The sea sand layer 11, the pebble cushion layer 12 and the fine sand layer 13 provide stable support for the concrete leveling layer 14, so that the embankment structure 15 on the concrete leveling layer 14 can remain stable for a long time. This is the working principle of the foundation replacement structure in the coastal silt area.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A foundation replacement structure in a coastal mud area, comprising a mud foundation (1) and an embankment structure (15), characterized in that: A foundation pit (2) is arranged on the silt foundation (1), a bottom clay layer (3) is arranged at the bottom of the foundation pit (2), a protective plate (4) is arranged on the side wall of the foundation pit (2), a stone cushion layer (7) is arranged in the foundation pit (2) above the bottom clay layer (3), an inner pit (8) is arranged on the stone cushion layer (7), a compacted clay layer (9) is arranged on the inner wall surface of the inner pit (8), a prefabricated board (10) is laid on the compacted clay layer (9), a sea sand layer (11) is arranged on the inner bottom of the prefabricated board (10), a pebble cushion layer (12) is arranged on the sea sand layer (11), a fine sand layer (13) is laid on the pebble cushion layer (12), a concrete leveling layer (14) is arranged on the fine sand layer (13), and a road embankment structure (15) is arranged on the top of the concrete leveling layer (14).

2. A foundation replacement structure for coastal mud areas according to claim 1, characterized in that: The protective plates (4) are symmetrically distributed about the center of the embankment structure (15), and the front view shape of the protective plates (4) is a "T" shape.

3. The coastal mud area foundation replacement structure according to claim 1 is characterized by: An embedded column (5) is fixedly mounted on the bottom surface of the side of the protection plate (4) away from the embankment structure (15), and an anti-sinking rod (6) is fixedly mounted on the embedded column (5).

4. A foundation replacement structure for coastal mud areas according to claim 3, characterized in that: The anti-sinking rods (6) are distributed on the embedded columns (5) at equal angles with respect to the center of the embedded columns (5), and the embedded columns (5) are distributed at equal intervals.

5. The coastal mud area foundation replacement structure according to claim 1 is characterized by: The outer side of the stone cushion layer (7) and the top ends of the compacted clay layer (9) and the prefabricated plate (10) are all in contact with the vertical portion of the protective plate (4), and the bottom end of the protective plate (4) is lower than the bottom end of the bottom clay layer (3).

6. The coastal mud area foundation replacement structure according to claim 1 is characterized by: The thickness of the compacted clay layer (9) is not less than half the thickness of the bottom clay layer (3), and the width of the bottom clay layer (3) is equal to the width of the foundation pit (2).

7. The coastal mud area foundation replacement structure according to claim 1 is characterized by: The top surface of the concrete leveling layer (14) and the top surface of the precast slab (10) are on the same horizontal plane, and the thickness of the concrete leveling layer (14) is greater than 3 times the thickness of the precast slab (10).

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