Novel TC pile capable of accelerating foundation drainage consolidation
By designing a new TC pile combining prefabricated pile tips, bidirectional plastic drainage plates and plastic casings, the problem of long processing time of soft soil foundations and the use of TC piles in the prior art is solved, and the effect of rapid drainage and consolidation and solidification of the foundation is achieved.
Patent Information
- Application Number
- CN202421566194.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-04
- Publication Date
- 2025-04-15
- Estimated Expiration
- 2034-07-04
AI Technical Summary
When the prior art deals with soft soil foundations with high moisture content, high compression properties and low shear strength, the construction period is long and labor-intensive, and the use of TC piles is limited by foundation conditions, and it is prone to adverse working conditions such as inclination and broken piles.
A new TC pile was designed, combining prefabricated pile tips, bidirectional plastic drainage plates and plastic sleeves. Through the design of serrated shells and bidirectional drainage plates, the friction and contact area between the pile body and soil are enhanced, and rapid drainage and consolidation is achieved.
The new TC pile can shorten the construction period while improving the stability and lateral load resistance of the foundation. It is suitable for foundations with poorer soil quality and achieve excellent results in stabilizing and reinforcing the foundation.
Smart Images
Figure CN222758859U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of civil engineering foundation treatment, and particularly relates to a new TC pile which can accelerate the drainage and consolidation of the foundation. Background Art
[0002] To treat soft soil foundation with high moisture content, high compressibility and low shear strength, plastic drainage boards are often used to consolidate and drain the foundation, thereby improving the foundation performance; TC piles and their pile-supported embankment system rigid pile composite foundation treatment method are also suitable for soft foundation reinforcement projects, with the advantages of good reinforcement effect, deep treatment depth, short construction period, easy quality control and reasonable cost.
[0003] However, both have obvious limitations in practical applications. The application of plastic drain boards often needs to be used in conjunction with methods such as preloading, vacuum preloading, and combined preloading to improve soil performance. Its installation requires a lot of manpower and is labor-intensive. Simply relying on plastic drain boards for drainage and consolidation often takes several months, affecting the construction period and efficiency. The TC pile method is thin and long, and its layout principle requires that the pile end must be driven into a bearing layer with better performance, and the layout requires fineness and density. Therefore, the use of TC piles is still greatly restricted by foundation conditions. If the foundation is all poor soil layers, TC piles will often appear tilted, broken piles and other unfavorable working conditions due to the lack of a solid bearing layer.
[0004] Based on the advantages and disadvantages of both, in order to make TC piles suitable for conditions with extremely poor soil performance and to shorten the consolidation and drainage period of drainage boards, it is necessary to combine drainage boards with TC piles to form a new type of TC pile that can accelerate foundation drainage and consolidation. Utility Model Content
[0005] In order to solve the above problems in a targeted manner, this project proposes a new type of TC pile that can accelerate the drainage and consolidation of the foundation. It not only has the advantages of high rigidity, partial prefabrication, and simple construction of TC piles, but can also use drainage boards to achieve drainage consolidation to improve the foundation, making TC piles suitable for foundations with worse soil quality and achieving an excellent effect of stabilizing and reinforcing the foundation.
[0006] In order to achieve the above technical objectives, the utility model adopts the following technical solutions:
[0007] A new type of TC pile that can accelerate the drainage and consolidation of the foundation, which consists of six parts from bottom to top: prefabricated pile tip, casing joint, two-way plastic drainage board, plastic casing, pile inner steel bar and pile cap;
[0008] The prefabricated pile tip is composed of a concrete pile tip, an installation slot and a pile tip plastic pipe. The pile tip plastic pipe of the prefabricated pile tip can be inserted into the lower part of the serrated plastic sleeve of the plastic sleeve to achieve connection.
[0009] The two-way plastic drain plate is composed of four parts: a vertical drain port, a horizontal drain port, a plastic connection clamp and a water-passing core plate. The plastic connection clamp of the two-way plastic drain plate is buckled and connected with the plastic connection slot of the plastic sleeve.
[0010] The plastic sleeve is composed of a serrated plastic sleeve and a plastic connection slot. The plastic sleeve is connected by inserting a portion of the pipe body into the sleeve joint.
[0011] The steel bars in the pile consist of two parts: the pile body steel bars and the pile cap steel bars. The length of the pile body steel bars penetrating into the pile body can be adjusted according to the situation. The steel bars are densely distributed at the junction of the pile body steel bars and the pile cap steel bars;
[0012] The concrete pile tip of the prefabricated pile tip is a prefabricated component, and the bottom is an inverted triangle. The pile tip plastic pipe of the prefabricated pile tip and the serrated plastic sleeve of the plastic sleeve are embedded in each other inside and outside, and are fixedly connected through a sleeve joint. The installation groove of the prefabricated pile tip can be connected with the steel sleeve during the installation process;
[0013] The vertical drain port and the horizontal drain port of the two-way plastic drain board can drain the water in the soil layer below and on the side to the surface under the action of the water pump. The middle part of the plastic connecting clamp is fan-shaped, and there are connecting tenons on both sides. The connecting tenons of the plastic connecting clamp are embedded and connected with the plastic connecting groove of the plastic sleeve. The water-passing core plate of the two-way plastic drain board is an ascending channel for water in the soil layer.
[0014] The plastic connection slot of the plastic sleeve is snap-connected with the plastic connection head of the two-way plastic drain plate, and the plastic connection head is aligned with the plastic connection slot for plugging and fixing;
[0015] A passage for a water-passing core plate of a bidirectional plastic drainage plate to pass through is reserved inside the pile cap, the water-passing core plate passes through the pile cap, and a water outlet is arranged outside the pile cap.
[0016] The utility model has the following characteristics and beneficial effects:
[0017] 1. The plastic sleeve adopted by the utility model has a serrated plastic sleeve and a plastic connecting groove on the outside. After the bidirectional plastic drain board is connected, the pile body is formed. The serrated outer shell can increase the friction between the pile body and the soil, and better provide bearing capacity. At the same time, the outward extension of the bidirectional plastic drain board can increase the contact area between the pile body and the soil, and it is rooted in the soil layer like a tree root, thereby improving the ability to resist lateral loads. The combination of the two comprehensively improves the engineering performance of TC piles.
[0018] 2. The bidirectional plastic drain board adopted in the utility model is different from the ordinary drain board in that it can achieve simultaneous drainage in both horizontal and vertical directions, and the number of drain outlets can be adjusted according to actual conditions, so as to ensure the drainage consolidation rate while controlling costs. In addition, the mode of TC piles plus drain boards allows the surface drainage system of the bidirectional plastic drain board to be combined with the cushion system of the TC piles in actual engineering applications to form a composite foundation system that can achieve drainage consolidation and improve soil performance, and its drainage system can be used as the basis for the later maintenance of the drainage system.
[0019] 3. The plastic sleeves used in the utility model are connected via sleeve joints and can be assembled according to the specific pile length during actual use. The excess plastic sleeves can be directly cut off with a cutter, and the construction is relatively simple. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 Schematic diagram of a new type of TC pile that can accelerate foundation drainage and consolidation.
[0021] Figure 2 Detail of the prefabricated pile tip of a new type of TC pile that can accelerate foundation drainage and consolidation.
[0022] Figure 3 This is a partial enlarged view of a new type of TC pile bidirectional plastic drainage board that can accelerate foundation drainage and consolidation.
[0023] Figure 4 A magnified detail of a new type of TC pile bidirectional plastic drain plate that can accelerate foundation drainage and consolidation.
[0024] Figure 5 Detail of the plastic casing of a new type of TC pile that can accelerate drainage and consolidation of the foundation.
[0025] Figure 6 A top view of a new type of TC pile that can accelerate foundation drainage and consolidation.
[0026] Figure 7 This is a detailed diagram of the connection between the plastic bidirectional drainage board and the plastic casing of a new type of TC pile that can accelerate foundation drainage and consolidation.
[0027] Figure 8 A schematic diagram of the lower pile connection of a new type of TC pile that can accelerate foundation drainage and consolidation.
[0028] Fig. 9 This is a schematic diagram of the upper and lower pile body connection of a new type of TC pile that can accelerate foundation drainage and consolidation.
[0029] Fig.10 Schematic diagram of the construction steps of a new type of TC pile that can accelerate foundation drainage and consolidation.
[0030] Fig.11 Schematic diagram of a composite foundation system formed by a new type of TC pile that can accelerate foundation drainage and consolidation.
[0031] Explanation of the numbers in the figure: 1 prefabricated pile tip; 2 casing joint; 3 two-way plastic drain board; 4 plastic casing; 5 steel bars in the pile; 6 pile cap; 1-1 concrete pile tip; 1-2 installation slot; 1-3 plastic pipe at the pile tip; 3-1 vertical drain outlet; 3-2 horizontal drain outlet; 3-3 plastic connecting clamp; 3-4 water-permeable core board; 4-1 serrated plastic casing; 4-2 plastic connecting slot; 5-1 pile body steel bars; 5-2 pile cap steel bars. DETAILED DESCRIPTION
[0032] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below with reference to the accompanying drawings.
[0033] A new type of TC pile that can accelerate the drainage and consolidation of the foundation, please refer to Figure 1 , from bottom to top, it is composed of six parts: prefabricated pile tip 1, casing joint 2, bidirectional plastic drainage board 3, plastic casing 4, pile inner steel bar 5 and pile cap 6; the specific structure of the prefabricated pile tip 1 can be referred to Figure 2 The prefabricated pile tip 1 is composed of a concrete pile tip 1-1, a mounting slot 1-2 and a pile tip plastic pipe 1-3. The pile tip plastic pipe 1-3 of the prefabricated pile tip 1 can be inserted into the lower part of the serrated plastic sleeve 4-1 of the plastic sleeve 4 to achieve connection; the specific structure of the bidirectional plastic drainage board 3 can refer to Figure 3 , Figure 4 The two-way plastic drain plate is composed of four parts: a vertical drain port 3-1, a horizontal drain port 3-2, a plastic connection clamp 3-3 and a water core plate 3-4. The plastic connection clamp 3-3 of the two-way plastic drain plate 3 is snap-connected with the plastic connection slot 4-2 of the plastic sleeve 4; the specific structure of the plastic sleeve 4 can be referred to Figure 5 The plastic sleeve is composed of a serrated plastic sleeve 4-1 and a plastic connecting groove 4-2. The plastic sleeve 4 is connected by inserting part of the tube into the sleeve joint 2. The steel bars 5 in the pile are composed of a pile body steel bar 5-1 and a pile cap steel bar 5-2. The length of the pile body steel bar 5-1 penetrating into the pile body can be adjusted according to the situation. The steel bars are densely distributed at the junction of the pile body steel bar 5-1 and the pile cap steel bar 5-2.
[0034] In this solution, in order to better explain the new TC pile forming process involved in the utility model, the connection between the bidirectional plastic drainage board 3 and the plastic sleeve 4 is introduced, referring to Figure 6 , Figure 7The plastic connecting clamp 3-3 of the two-way plastic drain board 3 is fan-shaped in the middle, with connecting tenons on both sides, and the connecting tenons of the plastic connecting clamp 3-3 are embedded and connected with the plastic connecting groove 4-2 on the plastic sleeve 4; the plastic connecting groove 4-2 of the plastic sleeve 4 is snap-connected with the plastic connecting clamp 3-3 of the two-way plastic drain board 3, and the plastic connecting clamp 3-3 is aligned with the plastic connecting groove 4-2 for plugging and fixing; the vertical drain port 3-1 and the horizontal drain port 3-2 of the two-way plastic drain board 3 can drain the water from the soil layer below and on the sides to the surface under the action of a water pump, and the water-passing core plate 3-4 of the two-way plastic drain board 3 is a rising channel for water in the soil layer.
[0035] In this solution, in order to better explain the process of forming the new TC pile involved in the utility model, the connection between the prefabricated pile tip 1 and the lower plastic sleeve 4 is introduced, referring to Figure 8 The concrete pile tip 1-1 of the prefabricated pile tip 1 is a prefabricated component with an inverted triangle at the bottom; the pile tip plastic pipe 1-3 of the prefabricated pile tip 1 and the serrated plastic sleeve 4-1 of the plastic sleeve 4 are embedded with each other inside and outside, and are fixedly connected through the sleeve joint 2; the installation groove 1-2 of the prefabricated pile tip 1 can be docked with the steel sleeve during the installation process.
[0036] In this solution, in order to better explain the process of forming the new TC pile involved in the utility model, the connection between the upper and lower plastic sleeves 3 is introduced, referring to Fig. 9 After the multi-section plastic sleeve 3 is butted up and down and fit together, it is connected through the sleeve joint 2 and glue to form a TC pile plastic pile body; the length of the entire pile body can be adjusted by changing the number of sections of the plastic sleeve 4 and using a tool to cut off part of the plastic sleeve 4.
[0037] When implementing it, follow the steps below to refer to Fig.10 :
[0038] (1) Step A: The prefabricated pile tip 1, the sleeve joint 2, the two-way plastic drain plate 3 and the plastic sleeve 4 are connected and assembled into a plastic pile body to be installed, and the connection mainly relies on the embedding, friction and glue between the structures;
[0039] (2) Step B: Use ropes, pulleys, etc. to lift the plastic pile body to be installed and dock it with the steel casing. Since the plastic pile body composed of the plastic casing 4 is made of flexible material, damage to the pile body should be avoided during lifting;
[0040] (3) Step C: After the plastic pile body and the steel sleeve are installed, a vibration driving device is used to apply a load to the steel sleeve. The steel sleeve and the plastic pile body to be installed are driven into the soil layer together. The steel sleeve has the function of bearing the driving load and protecting the internal plastic pile body. The concrete strength of the prefabricated pile tip 1 must be able to ensure that it will not be damaged under the driving load, and a shape similar to a drill bit should be set to facilitate breaking the soil layer;
[0041] (4) Step D: After the steel sleeve and the plastic pile body are driven to the designed elevation, the verticality of the driving is checked. After confirmation, the steel sleeve is pulled out of the soil layer, and water is injected into the plastic pile body. The main function of the water injection is to generate water pressure on the plastic pile body to offset the external soil pressure and prevent the plastic pile body from being damaged by the soil.
[0042] (5) Step E: After the water inside the plastic pile body is pumped out, concrete is poured into the plastic pile body;
[0043] (6) Step F: When the liquid level of the plastic pile body concrete is about to reach the design elevation of the steel bar 5 in the pile, the steel bar 5 in the pile is placed and the concrete pouring continues. To ensure the strength of the upper part of the pile, the concrete should be poured for a certain period of time after it overflows. Finally, a complete new type of TC pile is formed that can accelerate the drainage and consolidation of the foundation.
[0044] In addition, the parts of the two-way plastic drainage board 3 that extend beyond the ground and the pile cap are subsequently treated with a drainage system, a cushion layer, and a pile load to form a composite foundation with drainage function. Fig.11 Under the dual effects of TC piles and drainage consolidation, the foundation strength of the composite foundation can be better guaranteed.
Claims
1. A new type of TC pile that can accelerate the drainage and consolidation of the foundation, comprising a prefabricated pile tip (1), a sleeve joint (2), a bidirectional plastic drainage board (3), a plastic sleeve (4), a steel bar in the pile (5) and a pile cap (6), characterized in that: The prefabricated pile tip (1) is composed of three parts: a concrete pile tip (1-1), a mounting slot (1-2) and a pile tip plastic pipe (1-3); the pile tip plastic pipe (1-3) of the prefabricated pile tip (1) can be inserted into the lower part of the serrated plastic sleeve (4-1) of the plastic sleeve (4) to achieve connection; the bidirectional plastic drain plate (3) is composed of four parts: a vertical drain port (3-1), a horizontal drain port (3-2), a plastic connection clamp (3-3) and a water-permeable core plate (3-4); the bidirectional plastic drain plate The plastic connection clamp (3-3) of the plastic sleeve (4) is snap-connected with the plastic connection clamping groove (4-2) of the plastic sleeve (4); the plastic sleeve (4) is composed of two parts, a serrated plastic sleeve (4-1) and a plastic connection clamping groove (4-2); the plastic sleeve (4) is connected by inserting a part of the pipe body into the sleeve joint (2); the pile inner steel bar (5) is composed of two parts, a pile body steel bar (5-1) and a pile cap steel bar (5-2); the length of the pile body steel bar (5-1) penetrating into the pile body can be adjusted according to the situation.
2. A new type of TC pile capable of accelerating drainage and consolidation of foundation according to claim 1, characterized in that: The concrete pile tip (1-1) of the prefabricated pile tip (1) is a prefabricated component, and the bottom is an inverted triangle; the pile tip plastic pipe (1-3) of the prefabricated pile tip (1) and the serrated plastic sleeve (4-1) of the plastic sleeve (4) are embedded in each other inside and outside, and are fixedly connected through a sleeve joint (2).
3. The novel TC pile capable of accelerating the drainage and consolidation of the foundation according to claim 1 is characterized in that: The vertical drain port (3-1) and the horizontal drain port (3-2) of the bidirectional plastic drain plate (3) can drain the water in the soil layer below and on the sides thereof to the ground surface under the action of a water pump; the middle part of the plastic connecting clamp (3-3) is fan-shaped, and has connecting tenons on both sides; the connecting tenons of the plastic connecting clamp (3-3) are embedded and connected with the plastic connecting groove (4-2) of the plastic sleeve (4); the water-permeable core plate (3-4) of the bidirectional plastic drain plate (3) is a rising channel for water in the soil layer.
4. The novel TC pile capable of accelerating the drainage and consolidation of the foundation according to claim 1 is characterized in that: The plastic connection slot (4-2) of the plastic sleeve (4) is snap-connected with the plastic connection clamp (3-3) of the bidirectional plastic drain plate (3), and the plastic connection clamp (3-3) is aligned with the plastic connection slot (4-2) for plugging and fixing.
5. The novel TC pile capable of accelerating the drainage and consolidation of the foundation according to claim 1 is characterized in that: A passage is reserved inside the pile cap (6) for the water-passing core plate (3-4) of the bidirectional plastic drainage plate (3) to pass through. The water-passing core plate (3-4) passes through the pile cap (6), and the water outlet is arranged outside the pile cap (6).