Composite foundation structure for low-rise building

Abstract

The utility model discloses a composite foundation structure for a low-rise building, and belongs to the technical field of composite foundation structures, the composite foundation structure for the low-rise building comprises a raft plate, a plurality of ground pile assemblies and a plurality of anti-sliding walls, the ground pile assemblies and the anti-sliding walls are embedded in a foundation, and the anti-sliding walls are embedded in the raft plate. The two ends of the anti-sliding wall are connected with the adjacent ground pile assemblies respectively, and the raft is laid on the ground pile assemblies and the anti-sliding wall and connected with the ground pile assemblies and the anti-sliding wall at the same time. The composite foundation structure for the low-rise building comprises a raft plate, a plurality of ground pile assemblies and a plurality of anti-sliding walls, the ground pile assemblies and the anti-sliding walls are buried in a foundation, the two ends of each anti-sliding wall are connected with the adjacent ground pile assemblies respectively, and the raft plate is laid on the ground pile assemblies and connected with the ground pile assemblies.

Description

TECHNICAL FIELD

[0001] The utility model relates to composite foundation structure technical field especially relates to a composite foundation structure for low-rise building. BACKGROUND

[0002] The supporting house of photovoltaic and wind power projects is often built in mountainous and hilly areas according to project requirements, and the construction site is often in some side slope and scarp area. The site soil bearing capacity of such area can meet the construction requirements, but the bearing stratum is in a stable state when not constructed, and the disturbance in the construction process can cause the whole bearing stratum to collapse. When such geological conditions are encountered, the conventional treatment method is to use side slope support to fix the soil body. However, the supporting house is mostly a low-rise building with three floors or less, and the cost of using side slope support is much higher than the construction cost of the main building. Therefore, there is an urgent need for an anti-sliding foundation structure with low cost and good stability. SUMMARY

[0003] The main purpose of the utility model is to provide a composite foundation structure for low-rise building to solve the problem of high cost of anti-sliding foundation structure in the prior art.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0005] According to the composite foundation structure for low-rise building of the application, the raft, the plurality of pile groups and the plurality of anti-sliding walls are embedded in the foundation, the two ends of the anti-sliding wall are connected with the adjacent pile groups respectively, and the raft is laid on and connected with the pile groups and the anti-sliding walls at the same time.

[0006] Optionally, the plurality of pile groups are arranged in an array, the anti-sliding wall is arranged between any two adjacent pile groups in the same row or the same column, the pile group comprises a pile and a top plate arranged at the top end of the pile, and the top plate is connected with the raft.

[0007] Optionally, a plurality of reinforcing members are arranged on the outer wall of the section of the pile close to the top plate, and the reinforcing members are embedded in the anti-sliding wall.

[0008] Optionally, the pile is arranged as a pipe pile, a plurality of grout outlet holes are arranged on the peripheral wall of the pipe pile, a vent hole and a grouting hole are arranged on the top plate, and the vent hole, the grouting hole and the grout outlet hole are all communicated with the inner cavity of the pipe pile.

[0009] Optionally, the reinforcing member is arranged as a reinforcing steel bar, the plurality of reinforcing steel bars are divided into a plurality of layers, and the reinforcing steel bars in each layer are arranged in sequence along the circumference of the pipe pile.

[0010] Optionally, the ground pile is provided with at least one wing plate along the length direction, the wing plate is embedded in the foundation and is connected with the side end face of the anti-slide wall.

[0011] Optionally, the ground pile is configured as an H-shaped steel, and the wing plate is configured as a flange plate of the H-shaped steel.

[0012] Optionally, the bottom end of the H-shaped steel is provided with a pointed end part, the pointed end part is made by cutting off the corresponding position of the flange plate and cutting the web of the H-shaped steel into a triangle.

[0013] Optionally, the reinforcing member is configured as a stud, a part of the rod body of the stud is embedded in the flange plate, and the head and a part of the rod body of the stud are embedded in the anti-slide wall.

[0014] Optionally, a plurality of anchor members are arranged on the top plate, the anchor member comprises a first reinforcing part and a second reinforcing part, the first reinforcing part is embedded in the raft, the first reinforcing part extends outward in a direction gradually away from the H-shaped steel, the second reinforcing part is parallel to the top plate and is welded to the top plate, the outer end of the second reinforcing part is connected to the first reinforcing part, and the first reinforcing part and the second reinforcing part are integrally formed.

[0015] Compared with the prior art, the above technical solution provided by the utility model has the following advantages:

[0016] The low-rise building composite foundation structure provided by the utility model embodiment can provide vertical supporting force by penetrating into the foundation, help to disperse the weight of the building, and effectively prevent the lateral movement of the soil. The two ends of the anti-slide wall are connected with the ground pile assembly, which can effectively prevent the sliding problem caused by the lateral movement of the soil and protect the safety of the building. Under the combined support of the ground pile assembly and the anti-slide wall, the raft can more evenly bear the load of the building structure, thereby avoiding the uneven settlement of the foundation caused by local overload. In addition, the above structure is flexible and can be adjusted according to different geological conditions and the size of the building. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 FIG. 1 is a schematic view of a low-rise building composite foundation structure provided by the utility model embodiment one;

[0018] Figure 2A bottom view of a composite foundation structure for low-rise buildings provided in Embodiment 1 of this utility model;

[0019] Figure 3 This is a front view of a pile assembly for a composite foundation structure for low-rise buildings, provided in Embodiment 1 of this utility model.

[0020] Figure 4 A top view of a pile assembly for a composite foundation structure for low-rise buildings provided in Embodiment 1 of this utility model;

[0021] Figure 5 This is a schematic diagram of a composite foundation structure for low-rise buildings provided in Embodiment 2 of this utility model;

[0022] Figure 6 A bottom view of a composite foundation structure for low-rise buildings provided in Embodiment 2 of this utility model;

[0023] Figure 7 An overhead view of a ground pile for a composite foundation structure for low-rise buildings, provided in Embodiment 2 of this utility model;

[0024] Figure 8 This is a front view of a pile assembly for a composite foundation structure for low-rise buildings, provided in Embodiment 2 of this utility model.

[0025] Figure 9 This is a top view of a pile assembly for a composite foundation structure for low-rise buildings, provided in Embodiment 2 of this utility model;

[0026] Figure 10 This is a top view of a pile cap for a composite foundation structure for low-rise buildings, provided in Embodiment 2 of this utility model.

[0027] Labeling Explanation: Raft slab 10, Ground pile assembly 20, Ground pile 21, Grouting hole 211, Top plate 22, Vent hole 221, Grouting hole 222, Reinforcing member 23, Wing plate 24, Tip 25, Stud 26, Anchor 27, First reinforcement 271, Second reinforcement 272, Pile head reinforcement 28, Pile cap 29, Anti-slide wall 30, Foundation 1, Building structure 2, Cement grout 3, Clay layer 4, Silt layer 5. Detailed Implementation

[0028] The technical solutions of the utility model embodiments will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0029] like Figure 1 ,Figure 2 , Figure 5 and Figure 6 As shown, the composite foundation structure for low-rise buildings according to the embodiment of the utility model includes a raft slab 10, a plurality of ground pile components 20 and a plurality of anti-slip walls 30. The ground pile components 20 and the anti-slip walls 30 are embedded in the foundation 1. The two ends of the anti-slip walls 30 are respectively connected to the adjacent ground pile components 20. The raft slab 10 is laid on the ground pile components 20 and the anti-slip walls 30 and is simultaneously connected to the ground pile components 20 and the anti-slip walls 30.

[0030] In detail, the ground pile assembly 20 provides vertical support by penetrating deep into the foundation 1, helping to distribute the weight of the building. At the same time, because it is inserted into the stable stratum, the two ends of the anti-slide wall 30 are connected to the ground pile assembly 20, forming an integral whole with the ground pile assembly 20. The anchoring effect of the ground pile assembly 20 and the anti-slide wall 30 inserted into the stable stratum balances the landslide thrust, effectively preventing lateral soil movement and resisting lateral pressure, thereby stabilizing the landslide. The raft slab 10, as a horizontal load-bearing component, is laid on the ground pile assembly 20, evenly distributing the pressure transmitted from the superstructure 2 to each ground pile 21.

[0031] like Figure 1 and Figure 5 As shown, regardless of whether the terrain is rocky or non-rocky, the pile component 20 can penetrate below the clay layer 4. For example, in a non-rocky lower layer, it can penetrate into the silt layer 5, and the transition between the two soil layers is the slip surface. This allows the combination of the pile component 20 and the anti-slide wall 30 to effectively improve the overall stability of the building foundation 1, especially in areas with poor geological conditions.

[0032] According to the low-rise building composite foundation structure of the utility model embodiment, the combination of the ground pile component 20 and the anti-slip wall 30 can effectively improve the overall stability of the building foundation 1, especially in areas with poor geological conditions. The anti-slip wall 30 can effectively prevent sliding problems caused by soil movement, protect the safety of the building, and under the joint support of the ground pile component 20 and the anti-slip wall 30, it is more conducive to the raft slab 10 to evenly bear the load of the building structure 2, and avoid uneven settlement of the foundation 1 caused by local overload. At the same time, the above structure is also more flexible, and the number of anti-slip walls and the number of ground pile components 20 can be adjusted adaptively according to different geological conditions and building size.

[0033] like Figure 2 and Figure 6 As shown, in some embodiments, multiple ground pile components 20 are arranged in an array, and an anti-slip wall 30 is provided between any two adjacent ground pile components 20 in the same row or column. The ground pile component 20 includes a ground pile 21 and a top plate 22 provided at the top of the ground pile 21. The top plate 22 is connected to the raft slab 10.

[0034] In detail, the presence of the anti-slide wall 30 can effectively prevent the displacement or sliding of the pile assembly 20 in the same row or column when subjected to external force, thereby ensuring the stability of the entire system, thereby improving the stability of the entire system, and at the same time, due to the arrangement of the anti-slide wall 30, the connection between adjacent pile assemblies 20 becomes more firm. The anti-slide wall 30 is suitable for various soil, rock layers and geological conditions, whether it is loose soil, soft soil, clay or rock layer, it can effectively play a role. In some embodiments, as shown in Figure 5 and Figure 10 The pile head reinforcement 28 and the pile cap 29 are also provided on the pile 21.

[0035] As shown in Figure 3 In some embodiments, a plurality of reinforcing members 23 are provided on the outer wall of the pile 21 close to the top plate 22, and the reinforcing members 23 are embedded in the anti-slide wall 30.

[0036] In the above embodiments, the reinforcing member 23 effectively enhances the overall structural strength of the pile 21 and the raft 10 by combining with the anti-slide wall 30, increases the friction between the pile assembly 20 and the anti-slide wall 30, and the reinforcing member 23 can also uniformly disperse the load pressure at the top end of the pile 21, avoiding local damage caused by stress concentration, thereby improving the anti-sliding ability of the overall structure, not only improving the stability of the foundation 1, but also better resisting natural forces such as earthquakes and strong winds, ensuring the safety of the building.

[0037] As shown in Figure 3 and Figure 4 In some embodiments, the pile 21 is provided as a pipe pile, and a plurality of grout holes 211 are provided on the peripheral wall of the pipe pile, and a vent hole 221 and a grouting hole 222 are provided on the top plate 22, and the vent hole 221, the grouting hole 222 and the grout hole 211 are all communicated with the inner cavity of the pipe pile.

[0038] In the above embodiments, the grouting hole 222 is used to inject cement slurry 3 or other filling materials into the inner cavity of the pipe pile, and the grout holes 211 on the pipe pile are used to discharge the cement slurry 3 injected into the inner cavity of the pipe pile into the gaps of the surrounding rock foundation 1, thereby improving the strength of the pipe pile and the reinforcement treatment of the foundation 1, especially suitable for rock conditions. When cement slurry 3 is injected into the pipe pile, air bubbles are generated, and the vent hole 221 allows these air bubbles to escape, thereby ensuring the density of the grouting material.

[0039] As shown in Figure 3 In some embodiments, the reinforcing member 23 is provided as a reinforcing steel bar, and a plurality of reinforcing steel bars are divided into multiple layers, and each layer of reinforcing steel bars is arranged in sequence along the circumference of the pipe pile.

[0040] In the above embodiments, the reinforcing steel bars are divided into multiple layers, which can significantly improve the compressive and bearing capacity of the pipe pile. Each layer of reinforcing steel bars is arranged in a staggered manner, forming a more solid grid layout, effectively dispersing the load and improving overall stability. Moreover, the multiple layers of reinforcing steel bars can enhance the seismic performance of the building. Under the action of an earthquake, the reinforcing steel bars of different layers work together to prevent the building from undergoing severe deformation or collapse, ensuring the safety and durability of the building. In addition, the arrangement of reinforcing steel bars in multiple layers helps to reduce the deformation and cracking of the building caused by uneven settlement of the foundation 1, reducing the risk of damage to the building structure 2 caused by uneven settlement of the foundation 1.

[0041] As shown in Figure 6 and Figure 7 , in some embodiments, the ground pile 21 is provided with at least one wing plate 24 along the length direction, which is embedded in the foundation 1 and connected with the side end face of the anti-slide wall 30.

[0042] In a non-rock foundation 1, the soil is usually loose and has low shear strength. The close combination of the wing plate 24 and the anti-slide wall 30 can effectively limit the lateral displacement of the foundation 1, enhance the stability and anti-slide capacity of the entire structure, and prevent the foundation from sliding or tilting. When the raft 10 is subjected to the load of the upper structure, the presence of the wing plate 24 can transfer part of the load to the stable soil layer deep in the foundation 1, thereby reducing the direct pressure on the surface weak soil layer and avoiding excessive or uneven settlement of the foundation 1. In addition, the arrangement of the wing plate 24 also helps to reduce the length and diameter of the ground pile 21, as the wing plate 24 can share part of the load, thereby reducing the dependence on the diameter and length of the ground pile 21, and to some extent simplifying the construction process and reducing the construction difficulty and cost.

[0043] As shown in Figures 5-7 , in some embodiments, the ground pile 21 is configured as an H-shaped steel, and the wing plate 24 is configured as a flange plate of the H-shaped steel.

[0044] In the above embodiments, the flange plate of the H-shaped steel is wide and the web is thin, which makes the bending resistance strong, about 5%-10% higher than that of traditional I-shaped steel. This means that under the same load conditions, the ground pile 21 using H-shaped steel can better withstand vertical and horizontal loads, thereby improving the stability and bearing capacity of the entire foundation 1. The use of H-shaped steel can greatly speed up the construction of the project, further reducing the construction cost.

[0045] As shown in Figure 8 , in some embodiments, the bottom end of the H-shaped steel is provided with a sharp end 25, which is made by cutting off the corresponding position of the flange plate and cutting the web of the H-shaped steel into a triangle.

[0046] In the above embodiment, the design of the tip 25 makes it easier for the bottom end of the H-beam to be embedded in the foundation 1, increasing the contact area with the foundation 1, reducing disturbance and damage to the foundation 1 during construction, and lowering construction difficulty and cost. At the same time, this also reduces potential errors and quality problems during construction. H-beams are inherently an economical cross-section steel material, with wide flanges and thin webs, resulting in a high strength-to-weight ratio. By removing part of the flange to form the tip 25, the cross-sectional shape can be further optimized without significantly reducing material strength, saving material usage and reducing material procurement and transportation costs. Simultaneously, the reduced construction difficulty and increased construction efficiency also indirectly reduce construction costs.

[0047] like Figure 7 As shown, in some embodiments, the reinforcement 23 is configured as a stud 26, with a portion of the stud 26 embedded in the flange plate, and the head and a portion of the stud 26 embedded in the anti-slip wall 30.

[0048] In the above embodiment, the pile 21 and the anti-slip wall 30 are connected by studs 26, which makes the entire foundation 1 structure more stable. Part of the stud 26 is embedded in the flange plate, and the head and part of the stud are embedded in the anti-slip wall 30, which can effectively distribute and transfer the load, reduce the burden on individual components, and prevent the structure from loosening. This design improves the overall load-bearing capacity of the structure and ensures that the foundation 1 can remain safe and reliable under high pressure.

[0049] like Figure 9 As shown, in some embodiments, the top plate 22 is provided with a plurality of anchors 27. The anchors 27 include a first reinforcing part 271 and a second reinforcing part 272. The first reinforcing part 271 is embedded in the raft slab 10 and extends outward in a direction gradually away from the H-beam. The second reinforcing part 272 is parallel to the top plate 22 and welded to the top plate 22. The outer end of the second reinforcing part 272 is connected to the first reinforcing part 271. The first reinforcing part 271 and the second reinforcing part 272 are integrally formed.

[0050] In the above embodiment, the first reinforcing part 271 is embedded in the raft 10, so that the anchor 27 is closely combined with the raft 10, and the firmness and stability of the whole structure are enhanced. When subjected to external force, such as settlement of the foundation 1 or horizontal force, the raft 10, the pile group assembly 20 and the anti-slide wall 30 can work better in cooperation to resist deformation and maintain the stability of the overall structure. The second reinforcing part 272 is welded to the top plate 22, which increases the connection strength between the anchor 27 and the pile group assembly 20. The first reinforcing part 271 and the second reinforcing part 272 are connected by an integral forming mode, the transition is smooth, and stress concentration caused by improper connection is avoided, thereby prolonging the service life of the anchor 27 and the foundation structure. The anchor 27 can be made of bent steel bars.

[0051] The specific embodiments of the utility model have been described in detail above, but it is only as an example, and the utility model is not limited to the specific embodiments described above. Any equivalent modification or alternative to the utility model for those skilled in the art is also within the scope of the utility model, and therefore, equivalent transformation, modification, improvement, etc. made without departing from the spirit and principle range of the utility model should be covered in the scope of the utility model.

Claims

1. A composite foundation structure for low-rise buildings, characterized in that, The raft plate, a plurality of pile assemblies and a plurality of anti-slide walls are embedded in the foundation, two ends of the anti-slide wall are connected with adjacent pile assemblies, and the raft plate is laid on and connected with the pile assemblies and the anti-slide walls.

2. The low-rise building composite foundation structure according to claim 1, characterized by A plurality of pile assemblies are arranged in an array, and the anti-slide walls are arranged between any two adjacent pile assemblies in the same row or column, the pile assembly comprises a pile and a top plate arranged at the top end of the pile, and the top plate is connected with the raft plate.

3. The low-rise building composite foundation structure according to claim 2, characterized by The pile is provided with a plurality of reinforcing members on the outer wall of the section close to the top plate, and the reinforcing members are embedded in the anti-slide wall.

4. The low-rise building composite foundation structure according to claim 3, wherein The pile is arranged as a pipe pile, the pipe pile is provided with a plurality of grout outlet holes on the peripheral wall, the top plate is provided with a vent hole and a grouting hole, and the vent hole, the grouting hole and the grout outlet holes are all communicated with the inner cavity of the pipe pile.

5. The low-rise building composite foundation structure according to claim 4, wherein The reinforcing members are arranged as reinforcing steel bars, and a plurality of reinforcing steel bars are divided into a plurality of layers, and each layer of reinforcing steel bars is arranged in sequence along the circumference of the pipe pile.

6. The low-rise building composite foundation structure according to claim 3, wherein The pile is provided with at least one wing plate along the length direction, the wing plate is embedded in the foundation and connected with the side end surface of the anti-slide wall.

7. The low-rise building composite foundation structure according to claim 6, wherein The pile is arranged as an H-shaped steel, and the wing plate is arranged as a flange plate of the H-shaped steel.

8. The low-rise building composite foundation structure according to claim 7, wherein The bottom end of the H-shaped steel is provided with a pointed end portion, and the pointed end portion is made by cutting off the corresponding position of the flange plate and cutting the web of the H-shaped steel into a triangle.

9. The low-rise building composite foundation structure according to claim 7, wherein The reinforcing members are arranged as studs, part of the rod portion of the stud is embedded in the flange plate, and the head and part of the rod portion of the stud are embedded in the anti-slide wall.

10. The low-rise building composite ground structure according to claim 7, wherein The top plate is provided with a plurality of anchor members, the anchor member comprises a first reinforcing portion and a second reinforcing portion, the first reinforcing portion is embedded in the raft plate, the first reinforcing portion extends outward in a direction gradually away from the H-shaped steel, the second reinforcing portion is parallel to the top plate and is welded to the top plate, the outer end of the second reinforcing portion is connected with the first reinforcing portion, and the first reinforcing portion and the second reinforcing portion are integrally formed.

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