Pulling-out construction method for temporary steel pipe pile

Abstract

The pulling-out construction method for the temporary steel pipe pile comprises the steps that a hole corresponding to the steel pipe pile is formed in a bridge, a lifting device is used for conducting a pre-pulling-out test on the steel pipe pile through the hole, and corresponding pulling-out treatment is conducted on the steel pipe pile according to the pre-pulling-out test result. And the lifting device is used for pulling out the steel pipe pile through the hole, so that the adverse effect of the space under the bridge on pile pulling can be reduced, the safety coefficient is improved, and the safety of the steel pipe pile in the pile pulling process is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of pile extraction, and further to a construction method for extracting temporary steel pipe piles. Background Art

[0002] Against the backdrop of China's rapid urbanization, the pace of infrastructure construction in cities and towns has accelerated, especially in first-tier cities, where the scale of urban road and bridge construction has increased significantly. In these bridge construction projects, steel pipe piles are widely used to temporarily support the main structure of the bridge. The use of such steel pipe piles not only ensures the flow of rivers and the normal operation of shipping business, but also provides the required support for bridges, so they are widely used throughout the country. However, when the bridge construction is completed, these steel pipe piles used for temporary support need to be removed. There are two main methods for removing steel pipe piles: one is cutting underwater, and the other is pulling them out on the water surface. Underwater cutting is difficult and risky, and is not suitable for deeply buried steel pipe piles. In contrast, the removal method on the water surface is more common in practical applications because of its lower risk and stronger operability.

[0003] In the process of removing temporary steel pipe piles by pulling piles on water, two technologies are usually used: full casing static pressure pile pulling method and floating crane combined with hydraulic vibration hammer pile pulling method. However, these methods are often limited by the height of the bridge and are not suitable for the removal of temporary steel pipe piles under the bridge. In addition, the preparation work of these methods is often insufficient and it is easy to damage the pile body, which not only reduces safety but also increases material loss.

[0004] To this end, the present invention is dedicated to providing a construction method for removing temporary steel pipe piles to solve the above technical problems. Summary of the invention

[0005] In response to the above technical problems, the purpose of this application is to provide a construction method for removing temporary steel pipe piles, reducing the space required for mechanical equipment during the removal construction process. While solving the problem that mechanical equipment is unable to construct due to space under the bridge, it can also reduce the damage to the steel pipe piles during the pile removal process and reduce material loss.

[0006] In order to achieve the above object, a construction method for removing temporary steel pipe piles is provided, comprising the following steps:

[0007] S1: holes are opened on the bridge corresponding to the steel pipe piles;

[0008] S2: using a lifting device to perform a pre-removal test on the steel pipe pile through the hole;

[0009] S3: performing corresponding extraction processing on the steel pipe pile according to the result of the pre-extraction test;

[0010] S4: Use the lifting device to pull the steel pipe pile out through the hole.

[0011] In some embodiments, the process of opening holes on the bridge corresponding to the steel pipe piles specifically includes the following steps:

[0012] S11: Acquire the attribute information of the steel pipe pile;

[0013] S12: According to the attribute information, holes corresponding to the steel pipe piles are opened on the bridge deck of the bridge.

[0014] In some embodiments, the attribute information includes location data, weight, diameter, and burial depth of the steel pipe pile.

[0015] In some embodiments, the method of performing a pre-removal test on the steel pipe pile through the hole using a lifting device specifically comprises the following steps:

[0016] S21: Select and use a suitable lifting device;

[0017] S22: Control the lifting device to clamp and connect with the steel pipe pile;

[0018] S23: Control the lifting device to lift the steel pipe pile upward using a preset power;

[0019] S24: Observe and determine whether the lifting device slips relative to the steel pipe pile.

[0020] In some embodiments, the controlling of the lifting device to be clamped and connected to the steel pipe pile specifically comprises the steps of:

[0021] S221: Control the lifting device to place the pipe pile through the hole on the upper end surface of the steel pipe pile, so that the upper end surface of the pipe pile is located above the bridge;

[0022] S222: welding and fixing the steel pipe pile and the connecting pipe pile;

[0023] S223: Control the lifting device to clamp the connecting pipe pile and the steel pipe pile respectively.

[0024] In some embodiments, the selection of using a suitable lifting device specifically comprises the steps of:

[0025] S211: Calculating the side friction force of each steel pipe pile according to the attribute information;

[0026] S212: Select and use a suitable lifting device according to the magnitude of the lateral friction force and the pull-out resistance calculated from the gravity of the steel pipe pile and the connecting pipe pile.

[0027] In some embodiments, the steel pipe pile is subjected to corresponding extraction treatment according to the result of the extraction test, and specifically comprises the steps of:

[0028] S31: when the lifting device slips relative to the steel pipe pile or the connecting pipe pile, controlling the lifting device to separate;

[0029] S32: flushing and cleaning the outer surface of the steel pipe pile or the pipe connecting pile;

[0030] S33: Repeat steps S22, S23, S24, S31 and S32 until no slippage occurs between the lifting device and the steel pipe pile and the connecting pipe pile.

[0031] In some embodiments, the power of the lifting device slightly greater than the anti-pulling force is the preset power.

[0032] In some embodiments, the method of using a lifting device to pull the steel pipe pile out through the hole specifically comprises the following steps:

[0033] S41: using the lifting device to reduce the friction between the steel pipe pile and surrounding soil;

[0034] S42: Using the lifting device to pull the steel pipe pile out a preset distance;

[0035] S43: cutting the steel pipe pile above the water surface or above the bridge deck;

[0036] S44: controlling the lifting device to lift and recycle the cut steel pipe piles;

[0037] S45: controlling the lifting device to clamp the remaining part of the steel pipe pile;

[0038] S46: Repeat steps S42, S43, S44 and S45 until the steel pipe pile is completely pulled out.

[0039] In some embodiments, the lifting device includes a floating crane and a vibrating hammer disposed on the floating crane, wherein the vibrating hammer is used to clamp the steel pipe pile and the connecting pipe pile and to reduce the friction between the steel pipe pile and surrounding soil.

[0040] Compared with the prior art, the temporary steel pipe pile removal construction method provided in this application has the following beneficial effects:

[0041] 1. The present invention provides a construction method for pulling out temporary steel pipe piles. When pulling out the steel pipe piles, holes corresponding to the steel pipe piles are opened on the bridge, and the lifting device can pull out the steel pipe piles through the holes, thereby reducing the influence of the space under the bridge during the pulling out process. In addition, the lifting device can perform a pre-pulling test on the steel pipe piles to test whether the steel pipe piles meet the pulling out requirements and reduce the possibility of damage to the steel pipe piles. After completing the pre-pulling test, the steel pipe piles can be pulled out so that the steel pipe piles can meet the pulling out requirements, further reducing the possibility of damage to the steel pipe piles, thereby saving the project construction cost, greatly improving the construction progress, and ensuring the personal safety of the operators to a certain extent.

[0042] 2. The present invention provides a construction method for removing temporary steel pipe piles. The pull-out resistance of each steel pipe pile is calculated through the attribute information of each steel pipe pile, and a suitable lifting device is selected based on the pull-out resistance to ensure that the lifting device can smoothly lift the steel pipe pile, thereby ensuring the safety of the pile body and the workers during the pile extraction process.

[0043] 3. The present invention provides a construction method for removing temporary steel pipe piles, which comprises the following steps: welding and fixing the connecting pipe pile to the upper end face of the steel pipe pile, and the upper end face of the connecting pipe pile extends out of the hole so that the upper end face of the connecting pipe pile is located above the bridge. The lifting device clamps and fixes the connecting pipe pile to achieve pile extraction. While avoiding the limitation of the space under the bridge, the verticality of the steel pipe pile can be better controlled to ensure that the floating crane and the vibrating hammer exert an upward force on the pile body, which is beneficial to the verticality control of the steel pipe pile and the protection of the pile body during pile extraction.

[0044] 4. The present invention provides a construction method for removing temporary steel pipe piles, which reduces the friction between the steel pipe piles and the surrounding soil by using a vibrating hammer, promotes the liquefaction of the soil around the steel pipe piles, and reduces the friction resistance on the side of the steel pipe piles under the action of high-frequency excitation, thereby reducing the force required for pulling out the piles and further reducing the possibility of damage to the pile body. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The preferred implementation scheme will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present application.

[0046] Figure 1 It is a flow chart of a construction method for removing temporary steel pipe piles provided by the present invention;

[0047] Figure 2 It is a schematic diagram of a temporary steel pipe pile removal construction method provided by the present invention during construction;

[0048] Figure 3It is a schematic diagram of a bridge provided by the present invention for a temporary steel pipe pile removal construction method.

[0049] Description of the accompanying drawings: steel pipe pile 1, pipe pile 2, connecting ring 3, bridge 4, hole 41, vibrating hammer 5, floating crane 6. DETAILED DESCRIPTION

[0050] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the specific implementation methods of the present application will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0051] In order to simplify the drawings, only the parts related to the application are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0052] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0053] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0054] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0055] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0056] In one embodiment, a method for removing temporary steel pipe piles is described, see the attached specification. Figures 1 to 3 By opening holes on the bridge 4 and performing pre-extraction testing and extraction processing on the steel pipe pile 1, the safety of the steel pipe pile 1 during extraction can be significantly improved, the damage to the pile body can be reduced, and it will not be restricted by the space under the bridge.

[0057] For details, see the appendix of the manual. Figures 1 to 3 , a construction method for removing temporary steel pipe piles, comprising the following steps:

[0058] S1: Open holes 41 on the bridge 4 corresponding to the steel pipe piles 1;

[0059] Specifically, a hole 41 is opened on the bridge 4. The hole 41 is opened on the bridge deck of the bridge 4 and is arranged corresponding to each steel pipe pile 1. By opening the hole 41 on the bridge 4, the lifting device can pull out the piles through the hole 41, thereby avoiding the lifting device pulling out the piles in the space under the bridge, so that the lifting device can make full use of the space and ensure the smooth progress of the pile pulling.

[0060] S2: Use a lifting device to perform a pre-removal test on the steel pipe pile 1 through the hole 41;

[0061] Specifically, in this step, a pre-removal test will be performed on the steel pipe pile 1 before the formal removal of the steel pipe pile 1. The pre-removal test is used to determine whether the connection strength between the lifting device and the steel pipe pile 1 meets the requirements, so that the lifting device will not be separated from the steel pipe pile 1 when the pile is pulled out, thereby ensuring the smooth removal of the steel pipe pile 1.

[0062] S3: performing corresponding extraction processing on the steel pipe pile 1 according to the result of the pre-extraction test;

[0063] Specifically, after the pre-extraction test is completed on the steel pipe pile 1 , the steel pipe pile 1 is subjected to corresponding extraction processing according to the result of the pre-extraction test of the steel pipe pile 1 , so that the steel pipe pile 1 meets the condition of being extracted through the hole 41 .

[0064] S4: Use a lifting device to pull out the steel pipe pile 1 through the hole 41.

[0065] It is understandable that in the prior art, the steel pipe piles 1 under the bridge are often limited by the space under the bridge, which places high demands on the pile pulling equipment and is easy to damage the pile body, resulting in unnecessary waste. Another method is to cut and remove the steel pipe piles underwater, but this method is difficult and dangerous, and has poor applicability for steel pipe piles that are buried deep in the ground. In the present embodiment, a method for removing temporary steel pipe piles is provided. By opening a hole 41 on the bridge 4, there is no need for a lifting device to perform construction under the bridge 4, thereby reducing the restrictions on the pile pulling construction under the bridge. Moreover, before the steel pipe pile 1 is formally pulled out, a pre-pulling test will be performed on the steel pipe pile 1 to test whether the lifting device meets the requirements for pulling out the steel pipe pile 1, thereby reducing the possibility of damage to the pile body during the pulling out process, thereby reducing the material waste of the steel pipe pile 1.

[0066] It should be noted that the holes 41 corresponding to the steel pipe piles 1 are formed on the bridge 4, and the specific steps include:

[0067] S11: Obtaining attribute information of the steel pipe pile 1;

[0068] S12: According to the attribute information, holes 41 corresponding to the steel pipe piles 1 are opened on the bridge deck of the bridge 4 .

[0069] It is understandable that the attribute information of the steel pipe pile 1 is related to the opening position of the hole 41 on the bridge 4 and the selection of the lifting device. The attribute information generally includes the position data, weight, diameter and burial depth of the steel pipe pile 1. The position data can be measured by the staff through a measuring instrument or obtained through drawings. After obtaining the position data and diameter information of the steel pipe pile 1, the staff will open holes 41 corresponding to the steel pipe piles 1 on the bridge deck. Generally speaking, the diameter of the hole 41 is slightly larger than the diameter of the steel pipe pile 1 to reserve space for the steel pipe pile 1 to adjust the verticality.

[0070] Furthermore, a pre-extraction test is performed on the steel pipe pile 1 through the hole 41 using a lifting device, which specifically includes the following steps:

[0071] S21: Choose and use appropriate lifting equipment;

[0072] S22: Control the lifting device to clamp and connect with the steel pipe pile 1;

[0073] S23: Control the lifting device to lift the steel pipe pile upward using a preset power;

[0074] S24: Observe and determine whether the lifting device has slipped relative to the steel pipe pile 1.

[0075] Furthermore, controlling the lifting device to be clamped and connected with the steel pipe pile 1 specifically comprises the following steps:

[0076] S221: Control the lifting device to place the pipe pile 2 through the hole 41 on the upper end surface of the steel pipe pile 1, so that the upper end surface of the pipe pile 2 is located above the bridge 4;

[0077] S222: Welding and fixing the steel pipe pile 1 and the pipe pile 2;

[0078] S223: Control the lifting device to clamp the pipe pile 2 and the steel pipe pile 1 respectively.

[0079] Specifically, the lifting device is operated so that the pipe pile 2 is set on the top of the steel pipe pile 1 through the hole 41, ensuring that the upper end surface of the pipe pile 2 is located above the bridge 4, so as to meet the needs of the lifting device to transport the pipe pile 2 above the bridge 4, and a professional measuring tool (such as a laser rangefinder) is used to accurately measure the top center point of the steel pipe pile 1 and the position of the hole 41, and the position of the pipe pile 2 is adjusted according to these data, so that the pipe pile 2 can be accurately aligned with the target area. Then, the steel pipe pile 1 and the pipe pile 2 are welded and fixed, that is, the upper end surface of the steel pipe pile 1 is welded and fixed to the lower end surface of the pipe pile 2. When welding the steel pipe pile 1 and the pipe pile 2, the connecting ring 3 can be set at the connection between the steel pipe pile 1 and the pipe pile 2 to ensure the connection strength between the two. After the welding is completed, the lifting and clamping of the pipe pile 2 is controlled, and the pipe pile 2 is pre-removed through a test, and the removal process is performed according to the pre-removal test results.

[0080] In addition, choose to use the appropriate lifting device, including the following steps:

[0081] S211: Calculate the side friction force of each steel pipe pile 1 according to the attribute information;

[0082] S212: According to the magnitude of the lateral friction force and the magnitude of the pull-out resistance calculated from the gravity of the steel pipe pile 1 and the pipe pile 2, a suitable lifting device is selected and used.

[0083] Specifically, each steel pipe pile 1 is inserted into the soil, and the magnitude of the pull-out resistance is related to the magnitude of the friction force of the surrounding soil on the steel pipe pile 1. Accordingly, the friction resistance of the soil to the pile body of the steel pipe pile 1 can be obtained by a calculation method, and the calculation formula is:

[0084] F v =2πr∫f v dz

[0085]

[0086] p0=γz;

[0087] Among them, Fv in the formula represents the lateral friction of steel pipe pile 1, R is the radius of steel pipe pile 1, Z is the burial depth of steel pipe pile 1, Ks is the horizontal pressure coefficient, p0 is the effective cover pressure of the soil layer, γ is the weight of the covering soil layer, and φ' is the friction angle between steel pipe pile 1 and the soil. After calculating the magnitude of the lateral friction of steel pipe pile 1, the gravity of steel pipe pile 1 and the gravity of connecting pile 2 are added to calculate the pull-out resistance of steel pipe pile 1.

[0088] After calculating the pull-out resistance of the steel pipe pile 1, a suitable lifting device is selected and used according to the pull-out resistance, so that the lifting device meets the requirements for lifting the steel pipe pile 1, that is, the power of the lifting device is greater than the pull-out resistance, and the steel pipe pile 1 can be pulled out. After selecting a suitable lifting device, the lifting device is controlled to clamp and connect with the steel pipe pile 1, and then the lifting device is controlled to use a preset power to lift the steel pipe pile 1 upwards, and the staff observes to determine whether there is slippage between the lifting device and the steel pipe pile 1.

[0089] In one embodiment, this embodiment further describes the extraction process of the steel pipe pile 1 according to the result of the extraction test, wherein S31: when the lifting device slips relative to the steel pipe pile 1 or the pipe pile 2, the lifting device is controlled to separate;

[0090] S32: flushing and cleaning the outer surface of the steel pipe pile 1 or the pipe pile 2;

[0091] S33: Repeat steps S22, S23, S24, S31 and S32 until no slippage occurs between the lifting device and the steel pipe pile 1 and the connecting pipe pile 2.

[0092] It is understandable that the lifting device needs to be clamped and fixed with the steel pipe pile 1 or the pipe pile 2 when pulling out the pile to ensure the smooth lifting of the steel pipe pile 1. When the staff observes that there is slippage between the lifting device and the steel pipe pile 1 or the pipe pile 2, it means that the friction between the lifting device 1 and the steel pipe pile 1 or the pipe pile 2 is insufficient, and the staff needs to clean and flush the outer surface of the steel pipe pile 1 or the pipe pile 2 to wash away the mud and sand to ensure that the clamping force of the lifting device can fully act on the steel pipe pile 1 or the pipe pile 2. After cleaning, use the lifting device to clamp the steel pipe pile 1 or the pipe pile 2, and use the preset power to lift the steel pipe pile 1 upward to determine whether the steel pipe pile 1 slips relative to the steel pipe pile 1 or the pipe pile 2. If no slippage occurs, proceed to the next step. If slippage continues to occur, repeat steps S22, S23, S24, S31 and S32 until there is no slippage between the lifting device and the steel pipe pile 1 or the pipe pile 2.

[0093] In addition, it should be pointed out that the power of the lifting device slightly greater than the pull-out force is the preset power.

[0094] Furthermore, the steel pipe pile 1 is pulled out through the hole 41 using a lifting device, which specifically includes the following steps:

[0095] S41: using a lifting device to reduce the friction between the steel pipe pile 1 and the surrounding soil;

[0096] S42: Using a lifting device to pull out the steel pipe pile 1 by a preset distance;

[0097] S43: cutting the steel pipe pile 1 above the water surface;

[0098] S44: Control the lifting device to lift and recycle the cut steel pipe pile 1;

[0099] S45: Control the lifting device to clamp the remaining part of the steel pipe pile 1;

[0100] S46: Repeat steps S42, S43 and S44 until the steel pipe pile 1 is completely pulled out.

[0101] It should be pointed out that the lifting device includes a floating crane 6 and a vibrating hammer 5 arranged on the floating crane 6, and the vibrating hammer 5 is used to clamp the steel pipe pile 1 and the pipe pile 2. In addition, the vibrating hammer 5 is also used to reduce the friction between the steel pipe pile 1 and the surrounding soil, and the high-frequency vibration of the hammer head is used to vibrate and liquefy the soil around the pile body of the steel pipe pile 1, thereby reducing its friction resistance to the steel pipe pile 1, so as to facilitate the removal of the steel pipe pile 1. When performing the vibration operation, the duration of the vibration should be accurately grasped and limited to a range of 3 to 5 minutes. The purpose of doing so is to ensure that the soil around the pile is fully liquefied, while preventing the pile body from colliding with the bridge structure. During the vibration process, the amplitude and vibration frequency must also be closely controlled. This is to prevent the pile body from breaking due to insufficient soil liquefaction. In the initial stage of vibration, a low-frequency and high-amplitude operation mode should be adopted, with the amplitude set at 18 mm and the vibration frequency adjusted to 1200 to 1300 rpm, and the vibration should be continued for 5 minutes to achieve initial loosening and liquefaction of the soil. Then, the amplitude is reduced to 12 mm and the vibration frequency is increased to 1500 to 1800 rpm to achieve complete liquefaction of the soil around the pile, thereby facilitating the smooth extraction of the steel pipe pile.

[0102] It is understandable that, S2: before using the lifting device to perform the pre-extraction test on the steel pipe pile through the hole, the silt cleaning work should be completed in the designated operation area and river channel. The floating crane 6 is combined with the vibrating hammer 5, and it is ensured that they are thoroughly debugged and tested. After confirming that the equipment is operating normally, the floating crane 6 is securely fixed to both sides of the river bank using a cable wind rope to ensure the stability and reliability of the extraction operation.

[0103] Preferably, the steel pipe pile 1 is pulled out by pulling it up and down, that is, after pulling it out 3 to 5 meters upward each time, it is then re-inserted 1 to 2 meters. When performing the steel pipe pile 1 extraction operation, it should be ensured that the interruption time during the operation does not exceed 10 minutes. This is to avoid the re-consolidation between the soil and the steel pipe pile 1, thereby affecting the subsequent pile extraction work.

[0104] The lifting device is controlled to pull out the steel pipe pile 1 by a preset distance so that the upper end surface of the steel pipe pile 1 extends out of the water surface or the bridge deck. After the lifting device pulls out the steel pipe pile 1 by the preset distance, the staff cuts the steel pipe pile 1 above the water surface or the bridge deck so that the remaining steel pipe pile 1 extends out of the water surface or the bridge deck, so as to facilitate the lifting device to transport the steel pipe pile 1 next time. Then the lifting device is controlled to transport and recycle the cut steel pipe pile 1 and the pipe pile 2. The lifting device is then controlled to clamp the remaining part of the steel pipe pile 1, and the steel pipe pile 1 is gradually pulled out according to the above steps. In addition, the size of the preset distance can be specifically adjusted according to the attribute information of the steel pipe pile 1.

[0105] In the initial stage of pulling out the steel pipe pile 1, the pile body is tightly combined with the surrounding soil, and the friction resistance reaches the maximum value. In this state, the pile body may be broken due to uneven force, and is limited by the space under the bridge. In order to solve this problem, the present invention proposes a method for pulling out piles on the upper part of the bridge, which is achieved by welding a pipe pile 2 on the steel pipe pile 1, so that the verticality of the steel pipe pile 1 can be more effectively controlled. By ensuring that the force applied to the pile body by the floating crane 6 and the vibrating hammer 5 is upward, it helps to maintain the verticality of the pile body during the pile pulling process.

[0106] It should be noted that the above embodiments can be freely combined as needed. The above are only preferred implementations of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application, and these improvements and modifications should also be regarded as the protection scope of the present application.

Claims

1. A construction method for removing temporary steel pipe piles, characterized in that: The following steps are involved: S1: holes are opened on the bridge corresponding to the steel pipe piles; S2: using a lifting device to perform a pre-removal test on the steel pipe pile through the hole; S3: performing corresponding extraction processing on the steel pipe pile according to the result of the pre-extraction test; S4: Use the lifting device to pull the steel pipe pile out through the hole.

2. A construction method for removing temporary steel pipe piles according to claim 1, characterized in that: The method of opening holes on the bridge corresponding to the steel pipe piles specifically includes the following steps: S11: Acquire the attribute information of the steel pipe pile; S12: According to the attribute information, holes corresponding to the steel pipe piles are opened on the bridge deck of the bridge.

3. A construction method for removing temporary steel pipe piles according to claim 2, characterized in that: The attribute information includes the location data, weight, diameter and burial depth of the steel pipe pile.

4. A construction method for removing temporary steel pipe piles according to claim 3, characterized in that: The method of using a lifting device to perform a pre-removal test on the steel pipe pile through the hole specifically includes the following steps: S21: Select and use a suitable lifting device; S22: Control the lifting device to clamp and connect with the steel pipe pile; S23: Control the lifting device to lift the steel pipe pile upward using a preset power; S24: Observe and determine whether the lifting device slips relative to the steel pipe pile.

5. A construction method for removing temporary steel pipe piles according to claim 4, characterized in that: The controlling of the lifting device to be clamped and connected with the steel pipe pile specifically comprises the following steps: S221: Control the lifting device to place the pipe pile through the hole on the upper end surface of the steel pipe pile, so that the upper end surface of the pipe pile is located above the bridge; S222: welding and fixing the steel pipe pile and the connecting pipe pile; S223: Control the lifting device to clamp the connecting pipe pile and the steel pipe pile respectively.

6. A construction method for removing temporary steel pipe piles according to claim 5, characterized in that: The selection and use of the appropriate lifting device specifically includes the following steps: S211: Calculating the side friction force of each steel pipe pile according to the attribute information; S212: Select and use a suitable lifting device according to the magnitude of the lateral friction force and the pull-out resistance calculated from the gravity of the steel pipe pile and the connecting pipe pile.

7. A construction method for removing temporary steel pipe piles according to claim 6, characterized in that: The steel pipe pile is subjected to corresponding extraction treatment according to the result of the extraction test, and specifically comprises the steps of: S31: when the lifting device slips relative to the steel pipe pile or the connecting pipe pile, controlling the lifting device to separate; S32: flushing and cleaning the outer surface of the steel pipe pile or the pipe connecting pile; S33: Repeat steps S22, S23, S24, S31 and S32 until no slippage occurs between the lifting device and the steel pipe pile and the connecting pipe pile.

8. A construction method for removing temporary steel pipe piles according to claim 6 or 7, characterized in that: The power of the lifting device slightly greater than the anti-pulling force is the preset power.

9. A construction method for removing temporary steel pipe piles according to any one of claims 1 to 7, characterized in that: The method of using a lifting device to pull the steel pipe pile out through the hole specifically includes the following steps: S41: using the lifting device to reduce the friction between the steel pipe pile and surrounding soil; S42: Using the lifting device to pull the steel pipe pile out a preset distance; S43: cutting the steel pipe pile above the water surface or above the bridge deck; S44: controlling the lifting device to lift and recycle the cut steel pipe piles; S45: controlling the lifting device to clamp the remaining part of the steel pipe pile; S46: Repeat steps S42, S43, S44 and S45 until the steel pipe pile is completely pulled out.

10. A construction method for removing temporary steel pipe piles according to claim 9, characterized in that: The lifting device comprises a floating crane and a vibrating hammer arranged on the floating crane, wherein the vibrating hammer is used for clamping the steel pipe pile and the connecting pipe pile and for reducing the friction between the steel pipe pile and surrounding soil.

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