Anti-scouring reinforcing method for fore shaft steel pipe pile

Abstract

The invention relates to the technical field of construction of steel pipe piles in water areas, in particular to an anti-scouring reinforcing method for locking steel pipe piles, which comprises the following steps: selecting reinforcing steel pipe piles matched with the original steel pipe piles in pipe diameter and steel pipe length according to the scouring condition of the original steel pipe piles positioned on an upstream face; the reinforcing steel pipe pile is hoisted to the position above the original steel pipe pile, the reinforcing steel pipe pile is driven into soil from the original steel pipe pile, that is, the reinforcing steel pipe pile is located in the original steel pipe pile, and the driving depth of the reinforcing steel pipe pile exceeds that of the original steel pipe pile; the reinforcing steel pipe piles and the original steel pipe piles are combined to form a double supporting system to resist water flow scouring force. The method has the advantages that structural stability is enhanced, construction is convenient and fast, economical efficiency is high, and adaptability is high.

Description

Technical Field

[0001] The invention relates to the technical field of steel pipe pile construction in water areas, and in particular to an anti-scouring reinforcement method for a locking steel pipe pile. Background Art

[0002] In conventional river construction, the reinforcement method for temporary structures affected by scouring is to throw earthbags, sandbags, gabions, etc. on the water surface.

[0003] When using earthbags and sandbags to backfill and reinforce to solve the problem of scouring of pipe piles on the water-facing surface of the cofferdam, although it has certain feasibility and flexibility, it also has some obvious disadvantages, as follows: 1) Low degree of mechanized operation: Earthbag and sandbag backfill reinforcement mainly relies on manual operation, and the degree of mechanization is relatively low, which not only increases labor costs, but also may lead to relatively low construction efficiency, especially in large-scale or emergency reinforcement projects.

[0004] 2) Slow construction speed: Compared with mechanized operations, manual loading, handling and stacking are significantly slower. This may result in the reinforcement project not being completed in a short time, thus affecting the construction progress of the entire project.

[0005] 3) Construction quality is difficult to guarantee: The quality of backfill reinforcement with earthbags and sandbags depends largely on the skills and experience of the construction workers. If the construction workers operate improperly or lack skills, it may cause problems such as uneven stacking of earthbags and insufficient density, which will affect the reinforcement effect.

[0006] 4) Great impact on the environment: When backfilling with earthbags for reinforcement, it may be necessary to dig soil from other places to make earthbags. This may cause damage to the ecological environment in the excavation area, and may also cause environmental pollution such as dust during transportation.

[0007] When the cofferdam pile water-facing surface is reinforced with gabions, it also has certain advantages, such as strong adaptability and strong structural integrity, but it also has some disadvantages, including: 1) Relatively short service life: The service life of gabion mesh will be affected by the material of the steel wire and environmental factors. The steel wire used is susceptible to oxidation, corrosion and other factors after long-term use, especially in a humid environment, which is more likely to cause wire breakage, deformation and other problems, thus shortening its service life.

[0008] 2) Loose structure: The structure of the gabion mesh is relatively loose. External collision or water erosion may cause rupture and collapse of the mesh, which poses a certain risk to its use in an environment where the water surface is eroded.

[0009] 3) Impact on the ecological environment: The production of gabion mesh requires a large amount of steel wire, which not only takes up a lot of energy and resources, but also may have a certain impact on the surrounding ecological environment during use.

[0010] 4) Construction complexity and technical requirements: The construction of gabions is relatively complicated and requires high technical skills from construction workers. During the construction process, it is necessary to ensure the correct assembly and filling of gabions, as well as good integration with other cofferdam structures, which increases the complexity of construction and the requirements for construction workers' skills.

[0011] 5) Impact resistance limitation: Although gabion mesh has certain impact resistance and wind and wave resistance characteristics, its impact resistance may still be limited under extreme water flow or wind and wave conditions. This requires full consideration of water flow conditions and potential wind and wave impacts during the design and construction process to ensure the effectiveness and safety of gabion mesh reinforcement. Summary of the invention

[0012] The purpose of the present invention is to provide a method for anti-scour reinforcement of locked steel pipe piles based on the above-mentioned deficiencies in the prior art. The method adopts the method of driving small pipe piles into large steel pipe piles located on the water-facing surface to reinforce the cofferdam. The method can better solve the cofferdam reinforcement construction under hydrological restrictions, and has the advantages of enhancing structural stability, improving anti-scour performance, convenient and economical construction, and strong adaptability. This reinforcement method has broad application prospects in inland waterways, water conservancy projects and other fields.

[0013] The purpose of the present invention is achieved by the following technical solutions: A method for reinforcing anti-scouring steel pipe piles, wherein the locking steel pipe piles are combined to form a cofferdam, one side of the cofferdam is a water-facing surface, and the locking steel pipe piles include original steel pipe piles, characterized in that the anti-scouring reinforcement method comprises the following steps: According to the scouring condition of the original steel pipe pile located on the water-facing surface, a reinforced steel pipe pile matching the pipe diameter and steel pipe length of the original steel pipe pile is selected; The reinforced steel pipe pile is hoisted above the original steel pipe pile, and the reinforced steel pipe pile is driven into the soil from the original steel pipe pile, that is, the reinforced steel pipe pile is located inside the original steel pipe pile, and the driving depth of the reinforced steel pipe pile exceeds the driving depth of the original steel pipe pile; The reinforced steel pipe piles and the original steel pipe piles are combined to form a double support system to resist the scouring force of water flow.

[0014] The reinforced steel pipe piles are driven one by one on each of the original steel pipe piles located on the water-facing surface, and the driving direction is from the side to the middle.

[0015] The part of the original steel pipe piles located behind the water facing surface is reinforced by injecting steel pipe piles along the vertical direction of the water facing surface.

[0016] The reinforced steel pipe piles are hoisted by a crawler crane and driven in with a vibrating hammer.

[0017] The advantages of the present invention are: 1) Enhance structural stability: Double support function: As the main structure, the large pipe piles have provided strong bearing capacity. On this basis, the small pipe piles inserted inside can further increase the overall rigidity of the cofferdam and form a more stable double support system. This double support can effectively resist the lateral pressure and impact force generated by water scouring and improve the overall stability of the cofferdam.

[0018] Improved bending resistance: The insertion of small piles can increase the modulus of the pile section, thereby improving its bending resistance. This enhanced bending resistance helps reduce deformation and damage to the cofferdam when it is eroded by water.

[0019] 2) Construction convenience and economy: Convenient construction: Compared with other reinforcement methods, the construction process of inserting small pipe piles into large pipe piles is relatively simple and easy to control. Since the small pipe piles are inserted into the installed large pipe piles, the construction difficulty and complexity can be reduced, and the construction efficiency can be improved.

[0020] Economical: From a cost perspective, the reinforcement method of inserting small pipe piles is more economical than rebuilding the cofferdam or using other complex reinforcement technologies. It can effectively improve the performance and safety of the cofferdam without significantly increasing the project investment.

[0021] 3) Strong adaptability: Adapt to different geological conditions: The reinforcement method of inserting small pipe piles is highly flexible and can be adjusted and optimized according to different geological conditions and scouring conditions. Whether it is soft soil, sandy soil or rock formation, effective reinforcement effect can be achieved by selecting the appropriate pipe pile type and construction parameters.

[0022] Adapt to changes in water flow: As water flow conditions change (such as floods, tides, etc.), the scouring effect on the cofferdam will also change. The reinforcement method of inserting small pipe piles can be adjusted and reinforced in time according to changes in water flow conditions to adapt to different scouring environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structural plane of the present invention; Figure 2 for Figure 1 AA section view. DETAILED DESCRIPTION

[0024] The features of the present invention and other related features are further described in detail below through embodiments in conjunction with the accompanying drawings to facilitate understanding by those skilled in the art: like Figure 1-2 As shown, the numbers 1-2 in the figure respectively represent: original steel pipe pile 1 and reinforced steel pipe pile 2.

[0025] Example: Figure 1 In this embodiment, the lock-mouth steel pipe pile scouring reinforcement method is used for the lock-mouth steel pipe pile to reinforce the water-facing surface when the cofferdam is constructed. Figure 1 The steel pipe piles on the water-facing side in the direction indicated by the arrow are reinforced to ensure that the steel pipe piles at this location can effectively resist the scouring force of the water flow. A supporting structure is set inside the cofferdam.

[0026] Combination Figure 1 and Figure 2 As shown, the anti-scour reinforcement method for the locked steel pipe pile in this embodiment includes the following steps: 1) Select the type of reinforced steel pipe pile 2: The reinforced pipe pile structure type is selected based on comprehensive factors such as the scouring condition of the original steel pipe pile 1, the diameter of the original steel pipe pile 1, and the length of the original steel pipe pile 1. For example, a reinforced steel pipe pile 2 with a diameter of Ø630*10mm and a length of 36m is inserted into the original steel pipe pile with a diameter of Ø820*14mm and a length of 27m on the water-facing surface of the cofferdam.

[0027] In this embodiment, the selection of the reinforcement steel pipe pile 2 has high flexibility and can be adjusted and optimized according to different geological conditions and scouring conditions. Whether it is soft soil, sandy soil or rock formation, effective reinforcement effect can be achieved by selecting appropriate pipe pile type and construction parameters.

[0028] 2) A crawler crane is used to hoist the reinforced steel pipe pile 2 with a diameter of Ø630*10mm and a length of 36m and place it in the original steel pipe pile 1 located on the water surface. Then the crawler crane is used in conjunction with a vibrating hammer to clamp the reinforced steel pipe pile 2 for injection. The original steel pipe piles 1 located on the water surface are reinforced and injected from both sides to the middle. After injection, the burial depth of the reinforced steel pipe pile 2 is 18m, that is, the burial depth of the reinforced steel pipe pile 2 is greater than that of the original steel pipe pile 1. The original steel pipe pile 1 on the water surface that is washed away is integrated with the reinforced steel pipe pile 2 to prevent the piles from overturning.

[0029] Specifically, the original steel pipe piles 1, as the main structure, have provided strong bearing capacity. On this basis, the reinforced steel pipe piles 2 inserted inside can further increase the overall rigidity of the cofferdam, forming a more stable double support system. This double support can effectively resist the lateral pressure and impact force generated by water scouring, and improve the overall stability of the cofferdam.

[0030] In this embodiment, the driving position of the reinforced steel pipe pile 2 is not arranged concentrically with the original steel pipe pile 1, but the outer wall of the reinforced steel pipe pile 2 is preferably closer to the inner wall of the original steel pipe pile 1 on the water-facing side. In some cases, when the outer wall of the reinforced steel pipe pile 2 is in contact with the inner wall of the original steel pipe pile 1, the double support system formed by the two can resist the water flow scouring force in the optimal situation.

[0031] In this embodiment, if Figure 1 As shown, in addition to the reinforced steel pipe piles 2 driven one by one inside each original steel pipe pile 1 on the water-facing side, reinforced steel pipe piles 2 are also driven inside some original steel pipe piles in the vertical direction of the water-facing surface, so that the reinforcement effect of each original steel pipe pile on the water-facing surface is further improved.

[0032] In this embodiment, as the water flow conditions change (such as floods, tides, etc.), the scouring effect on the cofferdam will also change. The reinforcement method of inserting and driving the reinforced steel pipe piles 2 can be adjusted and reinforced in time according to the changes in the water flow conditions to adapt to different scouring environments. The adjustment and reinforcement means that, on the one hand, the appropriate reinforced steel pipe piles 2 can be selected according to the magnitude of the scouring force, that is, the degree of reinforcement required for the original steel pipe piles 1, and on the other hand, the interior of the reinforced steel pipe piles 2 can be further reinforced according to the actual situation, and another new reinforced steel pipe pile can be driven to realize the establishment of a multiple support system and achieve an improvement in the support effect.

[0033] Although the above embodiments have described in detail the concepts and embodiments of the present invention with reference to the accompanying drawings, ordinary technicians in this field can recognize that various improvements and changes can still be made to the present invention without departing from the scope of the claims, so they are not described one by one here.

Claims

1. A method for reinforcing anti-scour of interlocking steel pipe piles, wherein the interlocking steel pipe piles are combined to form a cofferdam, one side of the cofferdam is a water-facing surface, and the interlocking steel pipe piles include original steel pipe piles, characterized in that: The anti-scour reinforcement method comprises the following steps: According to the scouring condition of the original steel pipe pile located on the water-facing surface, a reinforced steel pipe pile matching the pipe diameter and steel pipe length of the original steel pipe pile is selected; The reinforced steel pipe pile is hoisted above the original steel pipe pile, and the reinforced steel pipe pile is driven into the soil from the original steel pipe pile, that is, the reinforced steel pipe pile is located inside the original steel pipe pile, and the driving depth of the reinforced steel pipe pile exceeds the driving depth of the original steel pipe pile; The reinforced steel pipe piles and the original steel pipe piles are combined to form a double support system to resist the scouring force of water flow.

2. The anti-scouring reinforcement method for interlocking steel pipe piles according to claim 1 is characterized in that: The reinforced steel pipe piles are driven one by one on each of the original steel pipe piles located on the water-facing surface, and the driving direction is from the side to the middle.

3. A method for reinforcing anti-scouring steel pipe piles according to claim 1 or 2, characterized in that: The part of the original steel pipe piles located behind the water facing surface is reinforced by injecting steel pipe piles along the vertical direction of the water facing surface.

4. The anti-scouring reinforcement method for interlocking steel pipe piles according to claim 1 is characterized in that: The reinforced steel pipe piles are hoisted by a crawler crane and driven in with a vibrating hammer.

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