Sleeve type cast-in-place pile broken pile splicing method

Abstract

The invention discloses a sleeve type cast-in-place pile broken pile splicing method. The method comprises the following steps that firstly, a steel sleeve drill bit is jacked to the position of a broken pile, and the steel sleeve drill bit is used for protecting the side portion of a pile body; then, high-strength structural adhesive is injected to fill a gap between the steel sleeve drill bit and the pile body, and the connection strength is enhanced; and finally, fine aggregate concrete is used for filling gaps left by the steel sleeve drill bit, and the protection performance is further improved. The diameter of the steel sleeve drill bit is 2-5 cm larger than that of a pile body, so that it is guaranteed that the broken pile position is fully covered. Compared with the prior art, the method has the advantages that the broken pile does not need to be dug out or re-driven, the broken pile can be repaired quickly at low cost, the construction efficiency is remarkably improved, the repairing cost is reduced, disturbance to the surrounding environment is reduced, and the method has high economical efficiency and wide application prospects.

Description

Technical Field

[0001] The invention relates to a method for connecting a broken sleeve cast-in-place pile, and belongs to the technical field of broken pile repairing. Background Art

[0002] In civil engineering and infrastructure construction, pile foundations are important bearing structures, and their stability and reliability directly affect the safety and durability of the entire project. However, in the actual construction process, pile foundations may break due to various reasons, such as substandard construction quality, complex geological conditions, or external forces. Broken piles not only weaken the bearing capacity of the pile foundation, but may also cause a series of structural safety problems, and in severe cases even lead to the overall instability of the project. Therefore, the repair of broken piles has become an important issue in project maintenance.

[0003] At present, the commonly used repair methods for broken piles mainly include digging out the broken pile body in the pile hole and re-drilling and pouring new piles, or choosing another location to re-drill and pour pile foundations. Although these methods can restore the bearing capacity of the pile foundation to a certain extent, their construction process is complicated, the construction period is long and the cost is high. First, digging out the broken piles requires a lot of manpower and mechanical equipment, and it is easy to cause secondary damage to the surrounding environment and structure during the construction process. Secondly, re-drilling and pouring pile foundations requires detailed geological surveys and designs to ensure the stability and adaptability of the new piles, which further increases the cost of the project. In addition, choosing a new location for piling may also face the problems of tight land resources and limited construction space, which limits the flexibility and operability of the repair plan.

[0004] In summary, broken pile repair is an important part of infrastructure maintenance, but its high repair cost and complex construction process restrict the rapid advancement of the project. There is an urgent need for a low-cost, efficient and easy-to-implement broken pile treatment technology to meet the growing engineering needs and improve the safety and economic benefits of infrastructure. This not only has important theoretical significance, but also has broad practical application prospects, which is in line with the development trend of modern engineering technology and market demand. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a sleeve type cast-in-place pile broken pile connection method to overcome the shortcomings of the prior art.

[0006] The technical solution of the present invention is: a method for connecting broken sleeve cast-in-place piles, the method comprising the following steps: S1. Push the steel sleeve drill bit to the broken pile position and use the steel sleeve drill bit to protect the side of the broken pile position; S2. Inject the structural adhesive into the gap between the steel sleeve drill bit and the pile body.

[0007] Furthermore, the method also includes: S3, using fine stone concrete to fill the gap left by driving the steel sleeve drill bit.

[0008] Furthermore, the diameter of the steel sleeve drill bit is 2 cm-5 cm larger than the diameter of the pile body.

[0009] The beneficial effects of the present invention are: compared with the prior art, 1) The present invention does not need to dig out the broken pile or re-pile it at other locations. Instead, the steel sleeve drill bit is connected to the pile body using structural adhesive at the broken pile location to strengthen the bending and tensile strength of the broken pile location, thereby achieving rapid and low-cost repair of the broken pile; 2) The present invention fills the gap left by driving the steel sleeve drill bit with fine stone concrete, thereby realizing protection of the steel sleeve drill bit. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the present invention. DETAILED DESCRIPTION

[0011] Example 1: Reference Figure 1 This embodiment introduces the repair steps of a sleeve type cast-in-place pile broken pile connection method. Step S1: Install the steel sleeve drill bit 2 At the broken pile position 1-1, firstly, the steel sleeve drill bit 2 is slowly pushed to the broken pile position by the drilling equipment. The diameter of the steel sleeve drill bit 2 is selected to be 3 cm larger than the pile body diameter, ensuring that it has sufficient coverage area outside the pile body to effectively protect the side of the broken pile position 1-1. The specific operation is as follows: Equipment preparation: Select a steel sleeve drill bit 2 with a diameter of 30 cm, suitable for cast-in-place piles with a diameter of 25 cm.

[0012] Positioning the drill bit: Use a measuring instrument to accurately locate the broken pile position 1-1, and ensure that the drill bit accurately reaches the broken pile.

[0013] Push the drill bit: Slowly and steadily push the steel sleeve drill bit 2 to the broken pile position 1-1, ensuring that the sleeve firmly protects the side of the broken pile to avoid further structural movement or damage.

[0014] Step S2: Injecting structural adhesive 3 In the gap formed between the steel sleeve drill bit 2 and the pile body 1, high-strength structural adhesive 3 is evenly injected. The specific operation is as follows: Prepare structural adhesive 3: Select structural adhesive 3 that meets the project requirements to ensure it has excellent bonding performance and durability.

[0015] Glue injection equipment: Use high-pressure glue injection equipment to ensure that the structural glue 3 can fully penetrate into the gap.

[0016] Glue injection process: Starting from one end of the steel sleeve drill bit 2, slowly inject the structural glue 3 to ensure that the entire gap is completely filled with the structural glue 3 to form a strong bonding layer.

[0017] Curing time: According to the technical requirements of structural adhesive 3, keep the injection area stable during the curing period, avoid external interference, and ensure that structural adhesive 3 is fully cured.

[0018] Step S3: Filling with fine stone concrete 4 After the structural adhesive 3 is cured, the gap left by the steel sleeve drill bit 2 is filled with fine stone concrete 4. The specific operation is as follows: Concrete mix ratio: Use fine stone concrete 4 mix ratio of 1:2:4 cementitious material: fine aggregate: coarse aggregate to ensure that the concrete has good fluidity and filling properties.

[0019] Pouring method: The fine stone concrete 4 is evenly poured into the gap around the steel sleeve drill bit 2 by means of a pumping device, ensuring that the concrete is densely filled without obvious bubbles or voids.

[0020] Vibration treatment: Use a vibrating rod to vibrate the concrete appropriately to further eliminate bubbles in the concrete and enhance its density and adhesion.

[0021] Maintenance management: After the concrete is poured, it is covered and moisturized to ensure that the concrete is not affected by dryness during the initial hardening process, thereby improving its ultimate strength and durability.

[0022] Repair effect The broken pile position 1-1 was successfully repaired by the above-mentioned sleeve cast-in-place pile broken pile connection method. The specific effects are as follows: Structural reinforcement: The close combination of the structural adhesive 3 and the steel sleeve drill bit 2 effectively improves the bending and tensile strength of the broken pile position 1-1 and restores the bearing capacity of the pile foundation.

[0023] Construction efficiency: The entire repair process does not require digging out broken piles or re-piling. The construction period is shortened from two months in traditional methods to two weeks, significantly improving construction efficiency.

[0024] Cost saving: It saves a lot of manpower, machinery and material costs. The overall repair cost is reduced by about 40% compared with traditional methods, which has significant economic advantages.

[0025] Environmental protection: The restoration process reduces disturbance to the surrounding environment and structures, avoids secondary damage, and ensures the overall stability and safety of the construction area.

[0026] Improved durability: The filling of fine stone concrete 4 enhances the protective performance of the steel sleeve, preventing it from corrosion or displacement due to environmental factors during long-term use, and extending the service life of the repaired structure.

[0027] Conclusion: Through this example, we can see the feasibility and superiority of the sleeve type cast-in-place pile broken pile connection method in actual engineering. This method not only simplifies the construction process, shortens the construction period, and reduces the repair cost, but also effectively improves the quality and durability of broken pile repair, and has broad application prospects and promotion value.

[0028] The parts not described in detail in the present invention are all known technologies to those skilled in the art. Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A method for connecting broken sleeve cast-in-place piles, characterized in that: The method comprises the following steps: S1. Push the steel sleeve drill bit (2) to the broken pile position (1-1), and use the steel sleeve drill bit (2) to protect the side of the broken pile position (1-1); S2. Inject structural adhesive (3) into the gap between the steel sleeve drill bit (2) and the pile body (1).

2. The sleeve type cast-in-place pile broken pile connection method according to claim 1 is characterized in that: The method further comprises: S3, using fine stone concrete (4) to fill the gap left by driving the steel sleeve drill bit (2).

3. The method for connecting broken sleeve cast-in-place piles according to claim 1, characterized in that: The diameter of the steel sleeve drill bit (2) is 2 cm to 5 cm larger than the diameter of the pile body (1).

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