Self-drainage consolidation and pre-reinforcement pile foundation for soft foundation

Abstract

The invention relates to the field of foundation treatment and pile foundation engineering, in particular to a self-drainage consolidation and pre-reinforcement pile foundation for a soft foundation, which comprises a pile foundation mechanism, a hollow reinforced concrete pile foundation and a rubber air bag positioned in the reinforced concrete pile foundation; the drainage reinforcing mechanism comprises vertical water collecting grooves formed in the inner wall of the reinforced concrete pile foundation, the outer sides of the vertical water collecting grooves communicate with lateral protruding ribs, water storage tanks are arranged at the bottoms of the vertical water collecting grooves, and the multiple sets of vertical water collecting grooves and the multiple sets of lateral protruding ribs are arranged in an annular array mode relative to the reinforced concrete pile foundation. The lateral convex ribs are pressed into the soil body in the radial direction after the pile foundation penetrates into the soil body, the tip ends of the lateral convex ribs are arranged to be wedge-shaped, resistance can be effectively reduced in the construction penetration process, the wedge-shaped tip ends and the soil body are tightly embedded and fixed, and therefore the lateral interaction between the pile and the soil is remarkably enhanced, and the construction efficiency is improved. And finally, the overall structural stability and the lateral displacement resistance of the pile foundation are improved.

Description

Technical Field

[0001] This invention relates to the field of foundation treatment and pile foundation engineering, and in particular to a self-draining consolidation and pre-reinforcement pile foundation for soft foundations. Background Technology

[0002] Soft foundations (such as silt, silty soil, saturated soft clay, etc.) are typically characterized by high water content, high compressibility, low strength, and poor permeability. In engineering construction, if not properly addressed, they can easily lead to a series of engineering problems, including excessive building settlement, long settlement stabilization periods, and insufficient foundation bearing capacity, seriously affecting project safety, quality, and schedule. Furthermore, saturated loose sand or silty soil foundations may liquefy under dynamic loads such as earthquakes, causing a sudden drop in soil strength and a rapid loss of bearing capacity, resulting in significant settlement, tilting, or even collapse of the superstructure. This is a critical issue that urgently needs to be addressed in the seismic design of geotechnical engineering.

[0003] Currently, conventional methods for treating weak foundations mainly focus on setting drainage paths, accelerating the dissipation of pore water pressure, and promoting soil consolidation to improve soil strength and stiffness. However, these methods typically have long treatment cycles and primarily improve the properties of the foundation soil itself, offering limited direct support capacity for building loads, and significant settlement may still occur after construction. On the other hand, pile foundations, by penetrating weak soil layers, transfer loads to deeper stable soil, effectively controlling settlement and providing reliable bearing capacity. However, this method does not actively improve soil properties and does not accelerate the consolidation of surrounding soft soil. Long-term secondary consolidation settlement of the soft soil may still generate negative skin friction on the pile body, thus affecting the long-term performance of the pile foundation. Therefore, a self-draining consolidation and pre-reinforced pile foundation for weak foundations is proposed. Summary of the Invention

[0004] In view of the problems existing in the above or prior art, the present invention is proposed.

[0005] Therefore, the purpose of this invention is to provide a self-draining consolidation and pre-reinforced pile foundation for soft soil foundations.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: including, The pile foundation structure includes a hollow reinforced concrete pile foundation, a rubber airbag located inside the reinforced concrete pile foundation, and... The drainage reinforcement mechanism includes a vertical water collection trough installed on the inner wall of a reinforced concrete pile foundation. The outer side of the vertical water collection trough is connected to a lateral rib, and a water storage tank is provided at the bottom of the vertical water collection trough.

[0007] As a preferred embodiment of the present invention for self-draining consolidation and pre-reinforcement pile foundations on soft soil, wherein: the vertical water collection trough and the lateral convex ribs are arranged in a ring array with respect to the reinforced concrete pile foundation in multiple sets; Each group of lateral ribs is arranged in a linear array along the axis of the reinforced concrete pile foundation, and there are multiple of them.

[0008] As a preferred embodiment of the present invention for self-draining consolidation and pre-reinforcement pile foundations on soft soil, wherein: the lateral rib includes a porous stainless steel pipe, the porous stainless steel pipe is wrapped with geotextile, and the geotextile is wrapped with a stainless steel filter mesh.

[0009] As a preferred embodiment of the present invention for self-draining consolidation and pre-reinforcement pile foundations on soft soil, wherein: the end of the porous stainless steel pipe is connected to the vertical water collection trough, and the front end of the porous stainless steel pipe is wedge-shaped.

[0010] As a preferred embodiment of the present invention for self-draining consolidation and pre-reinforcement pile foundations on soft soil, wherein: the rubber airbag is disposed between multiple sets of vertical water collection troughs; The rubber airbag can be inflated by an external air compressor to push the vertical water collection trough and the lateral rib on its outer side radially, so that the lateral rib is pressed into the soil outside the reinforced concrete pile foundation. The rubber airbag is detachably connected to the reinforced concrete pile foundation. When the lateral rib is pressed out, the rubber airbag can be removed and rigid filler can be used to fill the interior of the reinforced concrete pile foundation.

[0011] As a preferred embodiment of the present invention for self-draining consolidation and pre-reinforcement pile foundations on soft soil, wherein: the end of the porous stainless steel pipe is further fitted with a rubber sealing ring, and the rubber sealing ring fits into the reinforced concrete pile foundation to achieve sealing when the lateral rib is pushed out.

[0012] As a preferred embodiment of the present invention for self-draining consolidation and pre-reinforcement pile foundations on soft soil, wherein: the bottom of the plurality of vertical water collection troughs is connected to a water storage tank, the water storage tank is equipped with a drainage pump, and the output end of the drainage pump is connected to a drainage pipe.

[0013] As a preferred embodiment of the present invention for self-draining consolidation and pre-reinforcement pile foundations on soft soil, wherein: the drainage pipe extends upward to the outside of the reinforced concrete pile foundation.

[0014] As a preferred embodiment of the present invention for self-draining consolidation and pre-reinforcement pile foundations on soft soil, wherein: water level sensors are installed on the bottom and top of the inner side of the water storage tank.

[0015] As a preferred embodiment of the present invention for self-draining consolidation and pre-reinforcement pile foundations on soft soil, it further includes a solar panel electrically connected to a drainage pump and a water level sensor via a wire.

[0016] The beneficial effects of the self-draining consolidation and pre-reinforced pile foundation of the present invention for soft soil foundation are as follows: The present invention uses lateral convex ribs that are radially pressed into the soil after the pile foundation penetrates into the soil, and the tips of the ribs are set as wedges. This can effectively reduce the resistance during construction and penetration, and form a tight embedment with the soil through the wedge tips, thereby significantly enhancing the lateral interaction between the pile and the soil, and ultimately improving the overall structural stability and lateral displacement resistance of the pile foundation.

[0017] The lateral ribs used in this invention can depressurize and remove the rubber airbags after they are radially pressed into the soil. Then, rigid filler is filled into the pile foundation. This not only realizes the recycling and reuse of the rubber airbags, saving material costs, but also effectively maintains the shape of the pile foundation through the rigid filler, preventing it from shrinking back, thereby significantly improving the overall bearing capacity and long-term stability of the pile foundation.

[0018] The lateral ribs used in this invention can be inserted into the surrounding soil to expand the drainage range. The root is equipped with a rubber sealing ring, which can effectively prevent pore water from seeping into the pile body from the root. The front end adopts a three-layer composite structure from the inside out, consisting of porous stainless steel, geotextile and stainless steel filter screen, which can effectively filter the seeping pore water, prevent silt from clogging the internal drainage channel, significantly reduce the maintenance requirements of the device, and improve the reliability of long-term operation in soft foundations.

[0019] The water storage tank used in this invention is equipped with a drainage pump and a water level sensor. The water level sensor can intelligently control the start and stop of the drainage pump and use solar power to achieve full automation and energy self-sufficiency in the drainage process, thereby significantly improving the drainage efficiency and operational continuity of the system. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a top view schematic diagram of a self-draining consolidation and pre-reinforced pile foundation used for soft soil foundations.

[0022] Figure 2 This is a schematic diagram of the internal structure of a self-draining consolidation and pre-reinforced pile foundation used on soft soil.

[0023] Figure 3This is a schematic diagram of the structure of a rubber airbag after inflation in a self-draining consolidation and pre-reinforced pile foundation used on soft soil.

[0024] Figure 4 This is a schematic diagram of the exploded structure of a lateral rib in a self-draining consolidation and pre-reinforced pile foundation used on soft soil.

[0025] Figure 5 This is a schematic diagram of the internal filling structure of a reinforced concrete pile foundation used for self-draining consolidation and pre-reinforced pile foundations on soft soil.

[0026] In the diagram: 100, pile foundation structure; 101, reinforced concrete pile foundation; 102, rubber airbag; 103, solar panel; 200, drainage reinforcement mechanism; 201, vertical water collection trough; 202, lateral rib; 202a, porous stainless steel pipe; 202b, geotextile; 202c, stainless steel filter screen; 203, rubber sealing ring; 204, water storage tank; 205, drainage pump; 206, drainage pipe; 207, water level sensor. Detailed Implementation

[0027] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0028] Example Reference Figures 1-5 This embodiment of the present invention provides a self-draining consolidation and pre-reinforcement pile foundation for soft foundations, which includes a pile foundation mechanism 100 and a drainage reinforcement mechanism 200.

[0029] Specifically, the pile foundation structure 100 includes a hollow reinforced concrete pile foundation 101 and a rubber airbag 102 located inside the reinforced concrete pile foundation 101. The reinforced concrete pile foundation 101 is a hollow pile, and its pile body has a set of vertical connecting holes evenly distributed in four orthogonal directions.

[0030] The drainage reinforcement mechanism 200 includes a vertical water collection trough 201 installed on the inner wall of the reinforced concrete pile foundation 101. Lateral ribs 202 are connected to the outer side of the vertical water collection trough 201, and a water storage tank 204 is installed at the bottom of the vertical water collection trough 201. The vertical water collection trough 201 is a stainless steel component and is arranged in four directions on the reinforced concrete pile foundation 101.

[0031] The vertical water collection trough 201 and the lateral ribs 202 are arranged in a ring array with multiple sets about the reinforced concrete pile foundation 101; each set of lateral ribs 202 is arranged in a linear array along the axis of the reinforced concrete pile foundation 101 with multiple sets, and their number and position should correspond to the connecting holes in the reinforced concrete pile foundation 101.

[0032] Furthermore, the lateral rib 202 includes a porous stainless steel tube 202a as an inner support, a middle layer geotextile 202b as a filter layer wrapped around the porous stainless steel tube 202a, and an outer layer stainless steel filter screen 202c for protection wrapped around the geotextile 202b. The combination of the three parts can effectively filter the infiltrated pore water and prevent silt from clogging the internal drainage channels.

[0033] The end of the porous stainless steel pipe 202a is connected to the vertical water collection trough 201, and the front end of the porous stainless steel pipe 202a is wedge-shaped. The root of each lateral rib 202 is provided with a rubber sealing ring 203. When the lateral rib 202 is pushed out, the rubber sealing ring 203 is tightly fitted with the connecting hole on the reinforced concrete pile foundation 101 to achieve a seal, which can prevent pore water from seeping into the pile body from the root.

[0034] Rubber airbags 102 are positioned between multiple sets of vertical water collection troughs 201. The rubber airbags 102 can be inflated and pressurized by an external air compressor to radially push the outer vertical water collection troughs 201 and the lateral protruding ribs 202, causing the lateral protruding ribs 202 to be pressed into the soil outside the reinforced concrete pile foundation 101. In practical implementation, the rubber airbags 102 are used in conjunction with an air compressor to push the reinforcement and drainage composite device into the soil. After depressurization, the airbags can be removed, achieving the recycling and reuse of the rubber airbags 102.

[0035] After the rubber airbag 102 is removed, rigid filler can be filled into the reinforced concrete pile foundation 101. This rigid filler is filled into the pile foundation after the reinforcement and drainage composite device is pushed into the soil, effectively maintaining the shape of the reinforcement and drainage composite device, preventing its shrinkage, and thus significantly improving the overall bearing capacity and long-term stability of the pile foundation.

[0036] Multiple vertical water collection tanks 201 are connected to a water storage tank 204 at their bottoms for temporary storage of collected pore water. A drainage pump 205 is installed inside the water storage tank 204, and the output end of the drainage pump 205 is connected to a drainage pipe 206. The drainage pipe 206 extends upwards to the outside of the reinforced concrete pile foundation 101. Water level sensors 207 are installed on the bottom and top of the inner side of the water storage tank 204.

[0037] The drainage pump 205 and water level sensor 207 are electrically connected to the solar panel 103 via waterproof wires, enabling them to be powered by solar energy. The water level sensor 207 intelligently controls the start and stop of the drainage pump 205. When the water level rises to a preset high value, the water level sensor 207 triggers the drainage pump 205 to start, actively draining water through the drainage pipe 206; when the water level drops to a low limit, the pump automatically stops, thus achieving a fully automatic cycle and energy self-sufficiency in the drainage process.

[0038] The working principle of a self-draining consolidation and pre-reinforced pile foundation for soft soil provided by this invention is as follows: The reinforced concrete pile foundation 101, the reinforcement and drainage composite device, and the rubber airbag 102 are prefabricated and assembled in a factory. At this time, the composite device is housed inside the pile foundation, and the rubber airbag 102 is in an unpressurized state. After the integrated pile body is driven into the liquefied soil layer, the rubber airbag 102 is inflated and pressurized by an air compressor, driving the lateral ribs 202 of the reinforcement and drainage composite device to radially press into the surrounding soil. The rubber sealing ring 203 at the root of the rib then forms a tight seal with the connecting hole on the pile body. After the lateral ribs 202 are deployed, the rubber airbag 102 is depressurized and retracted. Rigid filler is then filled into the pile foundation to permanently maintain the deployed shape of the composite device and prevent it from retracting. Finally, the solar panel 103 is connected to the drainage pump 205 and water level sensor 207 in the water storage tank 204 via waterproof wires to form a complete power supply and control system. Pore ​​water in the liquefiable soil layer is filtered by the filter layer at the front end of the lateral rib 202 (i.e., a combined filter layer of stainless steel filter screen 202c, geotextile 202b, and porous stainless steel pipe 202a), and then flows into the vertical water collection trough 201 and is stored in the water storage tank 204. When the water level rises to a preset high value, the water level sensor 207 triggers the drainage pump 205 to start, actively draining water through the drainage pipe 206; when the water level drops to the low limit, the pump automatically stops, thus realizing a fully automatic cycle of the drainage process.

[0039] The components described above work together to form a composite pile foundation system that combines efficient self-drainage consolidation with high bearing capacity pre-reinforcement, fundamentally and simultaneously solving the problems of soil stability and foundation bearing capacity in soft soil foundations.

[0040] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A self-draining consolidation and pre-reinforcement pile foundation for soft soil foundations, characterized in that: include, The pile foundation structure (100) includes a hollow reinforced concrete pile foundation (101), a rubber airbag (102) located inside the reinforced concrete pile foundation (101); and, The drainage reinforcement mechanism (200) includes a vertical water collection trough (201) installed on the inner wall of the reinforced concrete pile foundation (101), the outer side of the vertical water collection trough (201) is connected to a lateral rib (202), and a water storage tank (204) is provided at the bottom of the vertical water collection trough (201).

2. The self-draining consolidation and pre-reinforcement pile foundation for soft soil as described in claim 1, characterized in that: The vertical water collection trough (201) and the lateral convex ribs (202) are arranged in multiple sets in a ring array about the reinforced concrete pile foundation (101); Each group of lateral ribs (202) is arranged in a linear array along the axis of the reinforced concrete pile foundation (101).

3. The self-draining consolidation and pre-reinforcement pile foundation for soft soil as described in claim 1 or 2, characterized in that: The lateral rib (202) includes a porous stainless steel tube (202a), the porous stainless steel tube (202a) is wrapped with geotextile (202b), and the geotextile (202b) is wrapped with stainless steel filter mesh (202c).

4. The self-draining consolidation and pre-reinforcement pile foundation for soft soil as described in claim 3, characterized in that: The end of the porous stainless steel pipe (202a) is connected to the vertical water collection tank (201), and the front end of the porous stainless steel pipe (202a) is wedge-shaped.

5. The self-draining consolidation and pre-reinforcement pile foundation for soft soil as described in claim 4, characterized in that: The rubber airbag (102) is disposed between multiple sets of vertical water collection tanks (201); The rubber airbag (102) can be inflated by an external air compressor to push the vertical water collection trough (201) and the lateral rib (202) on its outer side radially, so that the lateral rib (202) is pressed into the soil outside the reinforced concrete pile foundation (101); The rubber airbag (102) and the reinforced concrete pile foundation (101) are detachably connected. When the lateral rib (202) is pressed out, the rubber airbag (102) can be taken out and filled with rigid filler inside the reinforced concrete pile foundation (101).

6. The self-draining consolidation and pre-reinforcement pile foundation for soft soil as described in claim 5, characterized in that: The end of the porous stainless steel pipe (202a) is also fitted with a rubber sealing ring (203), which fits against the reinforced concrete pile foundation (101) to achieve a seal when the lateral rib (202) is pushed out.

7. The self-draining consolidation and pre-reinforcement pile foundation for soft soil as described in claim 6, characterized in that: The bottom of the plurality of vertical water collection tanks (201) is connected to a water storage tank (204), and a drain pump (205) is installed inside the water storage tank (204). The output end of the drain pump (205) is connected to a drain pipe (206).

8. The self-draining consolidation and pre-reinforcement pile foundation for soft soil as described in claim 7, characterized in that: The drainage pipe (206) extends upward to the outside of the reinforced concrete pile foundation (101).

9. The self-draining consolidation and pre-reinforcement pile foundation for soft soil as described in claim 8, characterized in that: Water level sensors (207) are installed on the bottom and top of the inner side of the water storage tank (204).

10. The self-draining consolidation and pre-reinforcement pile foundation for soft soil as described in claim 9, characterized in that: It also includes a solar panel (103) that is electrically connected to a drainage pump (205) and a water level sensor (207) via wires.

Images