Cast-in-place pile broken pile splicing method

Abstract

The invention discloses a pile splicing method for broken cast-in-place piles. According to the method, a pouring hole is formed in the upper end of a broken pile, an adhesive (such as cement paste or grouting materials) is poured into cracks of the broken pile through high pressure, slurry in the cracks is replaced, and firm connection of a pile body is achieved. The method comprises the specific steps that firstly, the upper end of a broken pile is drilled, and the hole bottom is communicated with a crack; then, high-pressure equipment is used for pouring an adhesive into the cracks until the cracks are completely filled; and finally, after the adhesive is cured, repairing is completed. Compared with a traditional method, broken piles do not need to be dug out or pile driving is not needed again, construction is easy, the construction period is short, cost is low, influences on the surrounding environment are small, and remarkable economic and technical advantages are achieved.

Description

Technical Field

[0001] The invention relates to a method for connecting a broken cast-in-place pile, belonging 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 method for connecting broken cast-in-place piles to overcome the shortcomings of the prior art.

[0006] The technical solution of the present invention is: a method for connecting broken cast-in-place piles, the method comprising the following steps: S1. Drill a grouting hole at the upper end of the pile body, and connect the cracks at the broken pile at the lower end of the grouting hole; S2, use high pressure to inject adhesive into the crack through the upper end of the injection hole; S3. Wait for the adhesive to cure.

[0007] Furthermore, the adhesive is cement slurry.

[0008] Furthermore, the adhesive is a grouting material.

[0009] Furthermore, in step S2, the method for determining whether the crack is filled after the adhesive is injected into the crack using high pressure is: detecting whether the adhesive pressure value reaches a steady state. If the adhesive pressure value reaches a steady state, it proves that the crack is filled with the adhesive.

[0010] The beneficial effect of the present invention is as follows: compared with the prior art, the present invention does not need to dig out the broken pile or re-pile at other positions, but instead drills a grouting hole at the upper end of the pile body, and the lower end of the grouting hole is connected to the crack at the broken pile, and an adhesive is poured into the crack through the upper end of the grouting hole using high pressure. After the adhesive is poured into the crack, the mud in the crack is squeezed out and replaced by high pressure, and after solidification, the pile bodies above and below the crack of the broken pile are connected, thereby achieving rapid and low-cost repair of the broken pile. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the present invention. DETAILED DESCRIPTION

[0012] Example 1: Reference Figure 1 This embodiment introduces the method for connecting broken cast-in-place piles of the present invention in detail through a specific embodiment.

[0013] Repair steps Step S1: Drilling injection holes Drill holes for grouting at the upper end of the broken pile. The specific operations are as follows: Determine the drilling position: According to the position and fracture condition of the broken pile, select the center position of the upper end of the pile as the location of the grouting hole.

[0014] Drilling equipment selection: Use a rotary drill to drill holes and ensure that the lower end of the grouting hole can accurately connect to the cracks at the broken pile.

[0015] Drilling construction: During the drilling process, the drilling depth is monitored in real time to ensure that the lower end of the grouting hole is connected with the crack 1-1 of the broken pile.

[0016] Step S2: High-pressure injection of adhesive Pour the adhesive into the cracks of the broken pile through the injection hole. The specific operations are as follows: Adhesive preparation: In this case, cement slurry or grouting material is selected as the adhesive. Stir it evenly to ensure that the cement slurry or grouting material has good fluidity and adhesion.

[0017] High-pressure grouting equipment: Use a high-pressure pump with the working pressure set to 10 MPa to ensure that the cement slurry or grouting material can fully penetrate into the cracks.

[0018] Infusion process: Connect the high-pressure pump 3 to the injection hole, gradually turn on the high-pressure pump 3, and start injecting cement slurry or grouting material.

[0019] During the pouring process, the pouring pressure is monitored in real time. When the pressure value gradually rises and reaches a steady state, that is, the pressure no longer changes significantly, it is determined that the crack 1-1 has been filled with cement slurry.

[0020] Turn off the high pressure pump to stop the perfusion.

[0021] Step S3: Waiting for the adhesive to cure Curing environment control: After the pouring is completed, keep the pouring hole and the surrounding environment moist to avoid premature water loss of cement slurry resulting in poor curing.

[0022] Curing time: According to the ratio of cement slurry and ambient temperature, the curing time is set to 7 days in this example. During this period, the sealing of the grouting holes is checked regularly to prevent external factors from interfering with the curing process.

[0023] Curing quality inspection: After the curing period, the ultrasonic detection method is used to conduct non-destructive testing on the repaired broken piles to confirm that the adhesive has been fully cured and effectively connects the upper and lower piles.

[0024] Repair effect Through the above steps, the mud in the crack 1-1 of the broken pile is successfully replaced and solidified by the high-pressure cement slurry or grouting material, and the upper and lower pile bodies 1 are firmly connected. The bearing capacity of the repaired pile foundation is restored to the original design standard, and the safety and stability of the engineering structure are effectively guaranteed. Compared with the traditional broken pile repair method, this embodiment does not need to dig out the broken pile or re-pile, the construction process is simple, the construction period is shortened, the cost is reduced, and the disturbance to the surrounding environment and structure is small, which has significant economic and technical advantages.

[0025] 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 cast-in-place piles, characterized in that: The method comprises the following steps: S1, drilling a grouting hole (2) at the upper end of the pile body (1), wherein the lower end of the grouting hole (2) is connected to the crack (1-1) at the broken pile; S2, injecting adhesive into the crack (1-1) through the upper end of the injection hole (2) using high pressure; S3. Wait for the adhesive to cure.

2. The method for connecting broken cast-in-place piles according to claim 1, characterized in that: The adhesive is cement slurry.

3. The method for connecting broken cast-in-place piles according to claim 1, characterized in that: The adhesive is a grouting material.

4. The method for connecting broken cast-in-place piles according to claim 1, characterized in that: In the step S2, after the adhesive is injected into the crack (1-1) using high pressure, the method for determining whether the crack (1-1) is filled is as follows: detecting whether the adhesive pressure value reaches a steady state; if the adhesive pressure value reaches a steady state, it is proved that the crack (1-1) is filled with the adhesive.

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