CN216275591U

CN216275591U - Anti-settlement structure adopting prestressed concrete pipe pile composite foundation

Info

Publication number: CN216275591U
Application number: CN202122616792.3U
Authority: CN
Inventors: 曹敏丽; 陈粤海; 何智亮; 吴文江
Original assignee: Zhuhai Huafa Habitat Life Research Institute Co Ltd
Current assignee: Zhuhai Huafa Habitat Life Research Institute Co Ltd
Priority date: 2021-10-28
Filing date: 2021-10-28
Publication date: 2022-04-12
Anticipated expiration: 2031-10-28

Abstract

The utility model discloses an anti-settlement structure of a composite foundation adopting prestressed concrete pipe piles, which relates to the field of constructional engineering and comprises a foundation, wherein the bottom of the foundation is fixedly connected with a plurality of rectangular pile caps distributed in an array manner, the middle parts of the lower surfaces of the pile caps are fixedly connected with pipe piles, and the bottom ends of the pipe piles penetrate through a silt layer and enter a bearing soil layer. The geogrid and the geotextile are arranged at the bottom of the foundation and are matched with each other, so that the condition of water and soil loss of a broken stone cushion layer and a backfill soil layer can be prevented, local collapse cannot be caused, and the problems of hard landscape sinking, road cracking and the like caused by uneven settlement influence on outdoor hard landscapes, fire lanes and the like with large amount of sitting on soft soil foundations can be avoided by arranging the pile caps made of cast-in-place reinforced concrete and simultaneously penetrating the bottom ends of the tubular piles through the silt layer and entering the bearing layer.

Description

Anti-settlement structure adopting prestressed concrete pipe pile composite foundation

Technical Field

The utility model relates to the field of constructional engineering, in particular to an anti-settlement structure for a composite foundation adopting prestressed concrete pipe piles.

Background

If the foundation of the soft soil foundation project is unevenly settled, the problems of sinking of outdoor hard landscape, cracking of fire fighting lanes and the like can be caused, and the use function and the impression are influenced. In order to reduce various negative effects caused by uneven settlement of the foundation, a prestressed concrete pipe pile composite foundation treatment method can be adopted to improve the foundation condition, ensure smooth construction of projects and reduce post-construction settlement of foundations such as outdoor hard landscapes, fire roads and the like. Therefore, it is necessary to invent a settlement-preventing structure for a composite foundation with prestressed concrete pipe piles to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an anti-settlement structure for a composite foundation adopting prestressed concrete pipe piles, which aims to solve the problems in the background art.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides an adopt composite foundation of prestressed concrete tubular pile to prevent subsiding structure, includes the ground, a plurality of rectangle pile caps that are the array distribution of bottom fixedly connected with of ground, the lower surface middle part fixedly connected with tubular pile of pile cap, the bottom of tubular pile pierces through silt layer and gets into in the power soil layer of holding, the ground is including setting up the geogrid at former soil layer upper surface, the upper surface laminating of geogrid is connected with geotechnological cloth, the last surface packing of geotechnological cloth has the rubble bed course, the last surface packing of rubble bed course has the backfill soil layer.

Preferably, the pile cap adopts C30 concrete cast-in-place shaping, the tubular pile is made through applying prestressing force by reinforced concrete, the inside pile core concrete that is filled in the upper end of tubular pile.

Preferably, the inside of pile core concrete is inlayed and is had the connecting reinforcement of steel sheet, the connecting reinforcement of steel sheet upwards extends to the inside of pile cap, and the upper end of the connecting reinforcement of steel sheet sets up to L shape structure.

Preferably, the inside of the upper and lower both sides of pile cap all inlays and has the reinforcing bar net, and the reinforcing bar net that is located pile cap downside passes through the ligature connection with the connecting reinforcement of belted steel board.

Preferably, the reinforcing mesh is formed by crisscross connection of a plurality of horizontal reinforcing bars and a plurality of vertical reinforcing bars, and the junction of horizontal reinforcing bar and vertical reinforcing bar passes through the ligature and connects, and two upper and lower rows of reinforcing mesh separate and support through "stirrup reinforcing bar".

Preferably, the thickness of the gravel cushion layer is 300mm, and the pile diameter of the tubular pile is 300mm and 400 mm.

The utility model has the technical effects and advantages that:

the geogrid and the geotextile are arranged at the bottom of the foundation and are matched with each other, so that the condition of water and soil loss of a broken stone cushion layer and a backfill soil layer can be prevented, local collapse cannot be caused, and the problems of hard landscape sinking, road cracking and the like caused by uneven settlement influence on outdoor hard landscapes, fire lanes and the like with large amount of sitting on soft soil foundations can be avoided by arranging the pile caps made of cast-in-place reinforced concrete and simultaneously penetrating the bottom ends of the tubular piles through the silt layer and entering the bearing layer.

Drawings

Fig. 1 is a schematic top view of the overall structure of the present invention.

Fig. 2 is a schematic cross-sectional view of the overall structure of the present invention.

Fig. 3 is a schematic view of the reinforcing mesh structure of the present invention.

Fig. 4 is a schematic sectional view of the tubular pile structure of the present invention.

In the figure: 1. a foundation; 2. pile caps; 3. a tubular pile; 4. a geogrid; 5. geotextile; 6. a gravel cushion layer; 7. backfilling the soil layer; 8. pile core concrete; 9. connecting steel bars with steel plates; 10. and (4) reinforcing mesh.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The utility model provides a settlement-preventing structure of a composite foundation adopting prestressed concrete pipe piles as shown in figures 1-4, which comprises a foundation 1, wherein the bottom of the foundation 1 is fixedly connected with a plurality of rectangular pile caps 2 distributed in an array manner, the pile caps 2 are formed by casting C30 concrete in situ, the middle part of the lower surface of each pile cap 2 is fixedly connected with a pipe pile 3, the bottom end of each pipe pile 3 penetrates through a sludge layer and enters a bearing soil layer, the problems of sinking, cracking and the like of hard landscapes, fire lanes and the like of outdoor hard landscapes with larger volume on the soft soil foundation 1 due to uneven settlement can be avoided, the pipe piles 3 are made of reinforced concrete by applying prestress, the pile diameter of each pipe pile 3 is 300-400mm, the upper ends of the pipe piles 3 are internally filled with core concrete 8, connecting reinforcing steel bars 9 with steel plates are embedded in the core concrete 8, the connecting reinforcing steel bars 9 with steel plates extend upwards to the inner parts of the pile caps 2, the upper ends of connecting steel bars 9 with steel plates are set to be L-shaped structures, the characteristic value of the bearing capacity of a single pile and the bearing capacity of the composite foundation 1 meet the design requirements through calculation, steel bar meshes 10 are embedded in the upper side and the lower side of the pile cap 2, the steel bar meshes 10 positioned on the lower side of the pile cap 2 are connected with the connecting steel bars 9 with the steel plates through binding, the connection strength of the pile cap 2 and the tubular pile 3 is improved through the cooperation of the steel bar meshes 10 and the connecting steel bars 9 with the steel plates, the pile cap 2 is prevented from being corroded by underground water, the steel bar meshes 10 are formed by connecting a plurality of transverse steel bars and a plurality of longitudinal steel bars in a crossed and staggered mode, the joints of the transverse steel bars and the longitudinal steel bars are connected through binding, the upper row of steel bar meshes 10 and the lower row of steel bar meshes 10 are separated and supported through stirrup steel bars, and the arrangement of the steel bar meshes 10 improves the bearing capacity of the pile cap 2.

Specifically, foundation 1 is including setting up geogrid 4 at former soil horizon upper surface, and geogrid 4's upper surface laminating is connected with geotechnological cloth 5, and geotechnological cloth 5's upper surface packing has rubble bed course 6, and rubble bed course 6's thickness is 300mm, and rubble bed course 6's upper surface packing has backfill soil layer 7, and geogrid 4 and the cooperation of geotechnological cloth 5 can prevent that rubble bed course 6 and backfill soil layer 7 from appearing the condition of soil erosion, can not arouse the local situation of caving.

According to the utility model, the geogrid 4 and the geotextile 5 are arranged at the bottom of the foundation 1, and the geogrid 4 and the geotextile 5 are matched to prevent the broken stone cushion layer 6 and the backfill soil layer 7 from water and soil loss, so that local collapse is avoided, and the problems of hard landscape sinking, road cracking and the like caused by uneven settlement influence on outdoor hard landscape, fire fighting lanes and the like with large volume on the soft soil foundation 1 can be avoided by arranging the pile cap 2 made of cast-in-place reinforced concrete and penetrating the bottom end of the tubular pile 3 through the silt layer and entering the bearing layer.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the utility model.

Claims

1. The utility model provides an adopt compound ground of prestressed concrete pipe pile to prevent subsiding structure, includes ground (1), its characterized in that: the utility model discloses a foundation, including ground (1), the bottom fixedly connected with of ground (1) is a plurality of rectangle pile cap (2) that are the array and distribute, the lower surface middle part fixedly connected with tubular pile (3) of pile cap (2), the bottom of tubular pile (3) pierces through the silt layer and gets into in the holding power soil layer, ground (1) is including setting up geogrid (4) at former soil horizon upper surface, the upper surface laminating of geogrid (4) is connected with geotechnological cloth (5), the upper surface packing of geotechnological cloth (5) has rubble bed course (6), the upper surface packing of rubble bed course (6) has backfill soil layer (7).

2. The anti-settlement structure adopting the prestressed concrete pipe pile composite foundation as claimed in claim 1, which is characterized in that: pile cap (2) adopt C30 concrete cast in situ, tubular pile (3) are made through applying prestressing force by reinforced concrete, the inside packing of upper end of tubular pile (3) has stake core concrete (8).

3. The anti-settlement structure adopting the prestressed concrete pipe pile composite foundation as claimed in claim 2, characterized in that: the inside of stake core concrete (8) is inlayed and is had connecting reinforcement (9) of taking the steel sheet, connecting reinforcement (9) of taking the steel sheet upwards extend to the inside of pile cap (2), and the upper end of connecting reinforcement (9) of taking the steel sheet sets up to L shape structure.

4. The anti-settlement structure adopting the prestressed concrete pipe pile composite foundation as claimed in claim 3, characterized in that: the upper side and the lower side of the pile cap (2) are internally inlaid with reinforcing meshes (10), and the reinforcing meshes (10) positioned on the lower side of the pile cap (2) are connected with the connecting steel bars (9) with steel plates through binding.

5. The anti-settlement structure adopting the prestressed concrete pipe pile composite foundation as claimed in claim 4, is characterized in that: the reinforcing mesh (10) is formed by crisscross connection of a plurality of horizontal reinforcing bars and a plurality of vertical reinforcing bars, and the junction of horizontal reinforcing bar and vertical reinforcing bar passes through the ligature and connects, and two rows of reinforcing mesh (10) are separated and are supported through "stirrup reinforcing bar" from top to bottom.

6. The anti-settlement structure adopting the prestressed concrete pipe pile composite foundation as claimed in claim 5, is characterized in that: the thickness of the gravel cushion layer (6) is 300mm, and the pile diameter of the tubular pile (3) is 300-400 mm.