Pipe pile driving construction method with sealed pile core

Abstract

This invention relates to the technical field of pipe piles and discloses a method for constructing pipe piles with sealed pile cores, comprising the following construction steps: 1) Constructing a pipe pile downwards in the soil layer, the pipe pile having a pile core inside; the bottom of the pipe pile is embedded in the soil, and the top of the pipe pile is exposed above the ground; 2) Embedding a pile plug in the upper part of the pile core, the pile plug sealing the pile core, with a gap between the pile plug and the top of the pipe pile; 3) Installing a pile driver on the top of the pipe pile, the pile driver driving the pipe pile downwards until the top of the pipe pile is embedded in a predetermined position in the soil, forming an empty pile section above the pipe pile, the empty pile section extending upwards to the ground; 4) Removing the pile driver, backfilling the empty pile section with backfill soil to form a backfill section, the backfill section pressing against the pile plug from top to bottom. In this way, the pile core is sealed by the pile plug, preventing the pile core from being filled with soil or cement slurry after the pile driver is removed, which would prevent the subsequent construction of the reinforcing cage and filling concrete.

Description

Technical Field

[0001] This invention patent relates to the technical field of pipe piles, and more specifically, to a method for driving pipe piles with sealed pile cores. Background Technology

[0002] The pile core refers to the circular portion in the middle of the pipe pile body, commonly used in pile foundation engineering. During construction, the pile core serves to strengthen the pile body and its bearing capacity, and can also act as a formwork for pouring the pile concrete.

[0003] In the existing technology, when the construction working surface is higher than the design pile top elevation during the construction of pipe piles, a special pile driver is required to drive the pipe pile to the design elevation. After the pile driver is pulled out, the pile core is easily filled with mud or cement slurry, which makes it impossible to construct the reinforcing cage and filling concrete later. Measures need to be taken to clean the pile core before construction, and the cleaning process is time-consuming and labor-intensive. Summary of the Invention

[0004] The purpose of this invention is to provide a method for constructing pipe piles with sealed pile cores, aiming to solve the problem in the prior art that the pile core is easily filled with soil or cement slurry after the pile driver is pulled out.

[0005] This invention is implemented as follows: a method for driving pipe piles with sealed pile cores, comprising the following construction steps:

[0006] 1) Constructing pipe piles downwards in the soil layer, wherein the pipe pile has a core inside; the bottom of the pipe pile is embedded in the soil, and the top of the pipe pile is exposed above the ground;

[0007] 2) A pile plug is embedded in the upper part of the pile core, the pile plug seals the pile core, and there is a gap between the pile plug and the top of the pipe pile;

[0008] 3) Install a pile driver on the top of the pipe pile. The pile driver drives the pipe pile downward until the top of the pipe pile is embedded in the soil at a set position. A hollow pile section is formed above the pipe pile and extends upward to the ground.

[0009] 4) Remove the pile driver and backfill the empty pile section with backfill soil to form a backfill section, which presses against the pile plug from top to bottom.

[0010] Optionally, in construction step 1), after the pipe pile is driven downwards into the soil, the cement slurry inside the pile core is cleaned.

[0011] Optionally, after the pipe pile is driven downwards into the soil, the top of the pipe pile has an exposed section above the ground, the height of which is between 300mm and 500mm.

[0012] Optionally, the upper part of the pile core has an installation position, and the pile plug includes a plug plate and two wedges; in construction step 2), after placing the wedges on both sides of the installation position, the plug plate is placed at the installation position, the inner sides of the two wedges are embedded in the plug plate, the outer sides of the wedges abut against the inner wall of the pile core, and the outer periphery of the plug plate abuts against the inner wall of the pile core.

[0013] The plug plate and two wedges are fixed at the installation position of the pile core, and the plug plate and two wedges seal the pile core; in construction step 4), the backfill section presses against the plug plate from top to bottom.

[0014] Optionally, the bottom of the pile driver has a pressure plate, and a pin extends downward from the center of the pressure plate; in construction step 3), the pressure plate is pressed against the top of the pipe pile, the pin is inserted into the pile core from top to bottom, and there is a pile driving interval between the pin and the plug plate.

[0015] Optionally, the wedge has an upright surface on its outer side and an inclined surface on its inner side, and the wedge is arranged inclined inward along the top-to-bottom direction; the stopper plate has two grooves on its outer side;

[0016] In construction step 2), after the plug plate is placed in the installation position, the inner side of the wedge is embedded in the groove, the inclined surface is inclined against the bottom of the groove, the upright surface is against the inner wall of the pile core, and the outer periphery of the plug plate is against the inner wall of the pile core.

[0017] Optionally, in construction step 2), after the wedge is embedded in the groove, the two wedges are driven to move upward synchronously, and the plug plate is driven to move downward synchronously, until the plug plate and the wedge are relatively fixed in the pile core.

[0018] Optionally, a lifting rope is connected between the two wedges, with each end of the lifting rope connected to one of the two wedges respectively; in construction step 2), the two wedges are placed in the installation position by holding the middle of the lifting rope; after the stopper plate is placed in the installation position and the inner sides of the two wedges are embedded in the groove, the two wedges are driven to move upward synchronously by pulling the middle of the lifting rope upward;

[0019] When the two wedges are driven to move upward synchronously by pulling the lifting rope upward, they press down against the middle of the plug plate, driving the plug plate to move downward synchronously. The wedges and the plug plate move in an up-down misalignment until the plug plate and the wedges are relatively fixed in the pile core.

[0020] Optionally, the outer periphery of the plug plate has a pressure wall formed between two grooves. In construction step 2), after the plug plate is fixed in the pile core, the pressure wall presses against the inner wall of the pile core.

[0021] The lifting rope has a longitudinally arranged threaded cylinder in the middle, and a drive rod is threaded through the threaded cylinder. The drive rod is threaded to the threaded cylinder, and the drive rod has a lower section below the threaded cylinder and an upper section above the threaded cylinder; the wedge has an upper extension section extending above the stopper plate.

[0022] A positioning cylinder is fitted around the outer periphery of the lower section, and horizontal rods are arranged horizontally on both sides of the positioning cylinder. An elastic pad is provided at the outer end of the horizontal rod.

[0023] In construction step 2), after the stopper plate is placed at the installation position, the drive rod is pre-rotated until the bottom of the drive rod abuts against the middle of the stopper plate, the elastic pad of the horizontal rod abuts against the upper extension of the wedge, and the lifting rope is in a straight state.

[0024] As the drive rod continues to rotate downwards a set distance, the bottom pressure plate of the drive rod moves downwards, and the lifting rope pulls the two wedges upwards. As the wedges move upwards, the elastic pad is compressed and deformed by the upper extension.

[0025] Optionally, a plurality of hollow cylinders are arranged at intervals below the threaded cylinder. Springs are provided on both sides of the hollow cylinders. The upper end of the springs is connected to the outside of the hollow cylinders, and the lower end of the springs is connected to the lifting rope. The springs are arranged at an outward inclination along the top-to-bottom direction.

[0026] In construction step 2), after the drive rod passes through the threaded cylinder, it passes through multiple hollow cylinders from top to bottom. During the downward rotation of the drive rod, the lifting ropes converge towards each other, and the springs on both sides of the hollow cylinder are stretched, applying tension to the lifting ropes to assist in driving the wedge to move upward.

[0027] Compared with the prior art, the core-sealing pipe pile driving construction method provided by the present invention seals the pile core with a pile plug, which avoids the pile core being filled with soil or cement slurry after the pile driver is removed, which would prevent the subsequent construction of the steel cage and core-filling concrete at the top of the pipe pile. This effectively avoids the workload and construction difficulty of cleaning the pile core later, reduces project costs and improves work efficiency. Attached Figure Description

[0028] Figure 1 This is a construction diagram of construction step 2) provided by the present invention;

[0029] Figure 2This is a construction diagram of construction step 3) provided by the present invention;

[0030] Figure 3 This is a construction diagram of construction step 4) provided by the present invention;

[0031] Figure 4 This is a top view of the plug plate provided by the present invention;

[0032] Figure 5 This is a cross-sectional schematic diagram of the plug device provided by the present invention;

[0033] Figure 6 This is a cross-sectional schematic diagram of construction step 2) provided by the present invention. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0035] The implementation of the present invention will be described in detail below with reference to specific embodiments.

[0036] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this invention, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0037] Reference Figure 1-6 The image shown is a preferred embodiment of the present invention.

[0038] The method for driving pipe piles with sealed pile cores provided by this invention includes the following construction steps:

[0039] 1) Pipe pile 100 is constructed downward in the soil layer, and the inside of pipe pile 100 has a pile core 101; the bottom of pipe pile 100 is embedded in the soil, and the top of pipe pile 100 is exposed above the ground.

[0040] 2) A pile plug is embedded in the upper part of the pile core 101, the pile plug seals the pile core 101, and there is a gap between the pile plug and the top of the pipe pile 100.

[0041] 3) Install a pile driver 300 on the top of the pipe pile 100. The pile driver 300 drives the pipe pile 100 downward until the top of the pipe pile 100 is embedded in the soil at the set position. A hollow pile section is formed above the pipe pile 100 and penetrates upward to the ground.

[0042] 4) Remove the pile driver 300 and use backfill soil to backfill the empty pile section to form a backfill section 400. The backfill section 400 presses against the pile plug from top to bottom.

[0043] The above-mentioned method for constructing a pipe pile 100 with a sealed core 101 uses a pile plug to seal the core 101, preventing the core 101 from being filled with soil or cement slurry after the pile driver 300 is removed. This would prevent the subsequent construction of the reinforcing cage and filling concrete at the top of the pipe pile 100, effectively reducing the workload and construction difficulty of cleaning the core 101 later, reducing project costs and improving work efficiency.

[0044] Specifically, in construction step 1), after the pipe pile 100 is driven downwards into the soil layer, the cement slurry inside the pile core 101 is cleaned.

[0045] Specifically, after the pipe pile 100 is driven downwards into the soil, the top of the pipe pile 100 has an exposed section above the ground, with a height of 300mm-500mm. This facilitates the installation of the pile plug and the pile driver 300.

[0046] The upper part of the pile core 101 has an installation position. The pile plug includes a plug plate 200 and two wedges 210. In construction step 2), after placing the wedges 210 on both sides of the installation position, the plug plate 200 is placed at the installation position. The inner sides of the two wedges 210 are embedded in the plug plate 200, the outer sides of the wedges 210 abut against the inner sidewall of the pile core 101, and the outer periphery of the plug plate 200 abuts against the inner sidewall of the pile core 101.

[0047] The plug plate 200 and two wedges 210 are fixed at the installation position of the pile core 101, and the plug plate 200 and two wedges 210 seal the pile core 101; in construction step 4), the backfill section 400 presses against the plug plate 200 from top to bottom. In this way, the plug plate 200 is tightened by the wedges 210, making its overall structure stable. The backfill section 400 will squeeze the plug plate 200 downwards, and the pile plug will be more secure under the pressure from the top, ensuring that the pile core 101 below the plug plate 200 is not backfilled with soil, effectively avoiding the workload and construction difficulty of cleaning the pile core 101 later.

[0048] The bottom of the pile driver 300 has a pressure plate, and a pin 310 extends downward from the center of the pressure plate. In construction step 3), the pressure plate is pressed against the top of the pipe pile 100, and the pin 310 is inserted into the pile core 101 from top to bottom, with a pile driving interval between the pin 310 and the plug plate 200. In this way, the pile driver 300 is installed through the reserved pile driving interval, avoiding the pin 310 pressing against the pile plug.

[0049] Specifically, the outer side of the wedge 210 has a vertical surface, the inner side of the wedge 210 has an inclined surface, and the wedge 210 is arranged inclined inward along the top-to-bottom direction; the outer side of the plug plate 200 is provided with two grooves 201.

[0050] In construction step 2), after the plug plate 200 is placed in the installation position, the inner side of the wedge 210 is embedded in the groove 201, the inclined surface of the wedge 210 abuts against the bottom of the groove 201, the vertical surface of the wedge abuts against the inner wall of the pile core 101, and the outer periphery of the plug plate 200 abuts against the inner wall of the pile core 101. Thus, by installing the wedge 210 into the groove 201, the plug plate 200 is pressed against the inclined surface, and the vertical surface of the plug plate 200 presses against the inner wall of the pile core 101, thereby clamping and fixing the wedge 210 in the groove 201.

[0051] In construction step 2), after the wedge 210 is embedded in the groove 201, the two wedges 210 are driven to move upward synchronously, and the stop plate 200 is driven to move downward synchronously, until the stop plate 200 and the wedges 210 are relatively fixed in the pile core 101. In this way, the wedges 210 are clamped and fixed, so that the overall structure is tightly fitted and stable.

[0052] Specifically, a lifting rope 211 is connected between the two wedges 210, and the two ends of the lifting rope 211 are respectively connected to the two wedges 210; in construction step 2), the two wedges 210 are placed in the installation position by lifting the middle part of the lifting rope 211; when the stopper plate 200 is placed in the installation position and the inner sides of the two wedges 210 are embedded in the groove 201, the two wedges 210 are driven to move upward synchronously by pulling the middle part of the lifting rope 211 upward.

[0053] When the lifting rope 211 is pulled upwards, driving the two wedges 210 to move upwards synchronously, they press down against the middle of the stopper plate 200, driving the stopper plate 200 to move downwards synchronously. The wedges 210 and the stopper plate 200 move in a staggered vertical position until the stopper plate 200 and the wedges 210 are relatively fixed in the pile core 101. In this way, the design of the lifting rope 211 enables the synchronous upward movement of the two wedges 210, making the overall construction simple and convenient.

[0054] The outer periphery of the plug plate 200 has a pressure wall, which is formed between two grooves 201. In construction step 2), after the plug plate 200 is relatively fixed in the pile core 101, the pressure wall presses against the inner wall of the pile core 101.

[0055] The lifting rope 211 has a longitudinally arranged threaded cylinder 220 in the middle, and a drive rod 221 is inserted through the threaded cylinder 220. The drive rod 221 is threadedly connected to the threaded cylinder 220. The drive rod 221 has a lower section below the threaded cylinder 220 and an upper section above the threaded cylinder 220. The wedge 210 has an upper extension section extending above the plug plate 200.

[0056] The lower section is fitted with a positioning cylinder 230 on its outer periphery. Horizontal rods 231 extend outward from both sides of the positioning cylinder 230 and are arranged horizontally. Elastic pads are provided at the outer ends of the horizontal rods 231.

[0057] In construction step 2), after the stopper plate 200 is placed in the installation position, the drive rod 221 is pre-rotated until the bottom of the drive rod 221 abuts against the middle of the stopper plate 200, the elastic pad of the horizontal rod 231 abuts against the upper extension of the wedge 210, and the lifting rope 211 is in a straight state.

[0058] As the drive rod 221 continues to rotate downwards at the set distance, the bottom of the drive rod 221 presses against the stop plate 200 downwards, and the lifting rope 211 pulls the two wedges 210 upwards. As the wedges 210 move upwards, the elastic pad is compressed and deformed by the upper extension. In this way, by rotating the drive rod 221 and simultaneously pulling it, the drive rod 221 presses down on the stop plate 200 and simultaneously lifts the two wedges 210, making the overall construction operation simple.

[0059] Specifically, the positioning cylinder 230 presses against the stopper plate 200, and the lower section passes through the positioning cylinder 230 and presses against the stopper plate 200. While the drive rod 221 rotates, the positioning cylinder 230 does not rotate. As the two wedges 210 move upward, they compress the elastic pad to ensure that the two wedges 210 are subjected to uniform force and to avoid the two wedges 210 being at different horizontal heights.

[0060] Below the threaded cylinder 220, there are multiple hollow cylinders 240 arranged at intervals. Springs 241 are provided on both sides of the hollow cylinder 240. The upper end of the spring 241 is connected to the outside of the hollow cylinder 240, and the lower end of the spring 241 is connected to the lifting rope 211. The springs 241 are arranged outward in a downward direction.

[0061] In construction step 2), after the drive rod 221 passes through the threaded cylinder 220, it passes through multiple hollow cylinders 240 from top to bottom. During the downward rotation of the drive rod 221, the lifting ropes 211 converge towards each other, and the springs 241 on both sides of the hollow cylinder 240 are stretched, applying tension to the lifting ropes 211 to assist the drive wedge 210 in moving upward. In this way, the hollow cylinder 240 and the drive rod 221 are threadedly engaged. After the drive rod 221 passes through the hollow cylinder 240, the springs 241 are stretched. Under the stretching of the springs 241 on both sides, the drive rod 221 moves downward relative to the hollow cylinder 240, while the hollow cylinder 240 does not rotate. The hollow cylinder 240 moves upward relative to the stopper plate 200, and the springs 241 on both sides continue to be stretched. This allows the two wedges 210 to be lifted while the drive rod 221 is rotated, making the construction operation simple and convenient.

[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for driving pipe piles with sealed cores, characterized in that, The construction steps include the following: 1) Constructing pipe piles downwards in the soil layer, wherein the pipe pile has a core inside; the bottom of the pipe pile is embedded in the soil, and the top of the pipe pile is exposed above the ground; 2) A pile plug is embedded in the upper part of the pile core, the pile plug seals the pile core, and there is a gap between the pile plug and the top of the pipe pile; 3) Install a pile driver on the top of the pipe pile. The pile driver drives the pipe pile downward until the top of the pipe pile is embedded in the soil at a set position. A hollow pile section is formed above the pipe pile and extends upward to the ground. 4) Remove the pile driver and backfill the empty pile section with backfill soil to form a backfill section, which presses against the pile plug from top to bottom; The upper part of the pile core has an installation position, and the pile plug includes a plug plate and two wedges; in construction step 2), after placing the wedges on both sides of the installation position, the plug plate is placed at the installation position, the inner sides of the two wedges are embedded in the plug plate, the outer sides of the wedges abut against the inner wall of the pile core, and the outer periphery of the plug plate abuts against the inner wall of the pile core; the plug plate and the two wedges are fixed at the installation position of the pile core, and the plug plate and the two wedges seal the pile core; The wedge has a vertical surface on its outer side and an inclined surface on its inner side. The wedge is arranged inclined inward along the top-to-bottom direction. The stopper plate has two grooves on its outer side. In construction step 2), after the wedge is embedded in the groove, the two wedges are driven to move upward synchronously, and the plug plate is driven to move downward synchronously, until the plug plate and the wedge are relatively fixed in the pile core; A lifting rope is connected between the two wedges, with each end of the lifting rope connected to one of the two wedges respectively. The outer periphery of the stopper plate has a pressure wall formed between two grooves. The middle of the lifting rope is provided with a longitudinally arranged threaded cylinder. A drive rod is inserted through the threaded cylinder and is threadedly connected to the threaded cylinder. The drive rod has a lower section below the threaded cylinder and an upper section above the threaded cylinder. A positioning cylinder is sleeved on the outer periphery of the lower section. Horizontal rods extend outward from both sides of the positioning cylinder. The outer ends of the horizontal rods are provided with elastic pads. Below the threaded cylinder are multiple hollow cylinders arranged at intervals. Springs are provided on both sides of each hollow cylinder. The upper end of each spring is connected to the outside of the hollow cylinder, and the lower end of each spring is connected to the lifting rope. The springs are arranged at an outward tilt along the top-to-bottom direction.

2. The method for constructing pipe piles with sealed pile cores as described in claim 1, characterized in that, In construction step 1), after the pipe pile is driven downwards into the soil layer, the cement slurry inside the pile core is cleaned.

3. The method for driving pipe piles with sealed pile cores as described in claim 1, characterized in that, After the pipe pile is driven downwards into the soil, the top of the pipe pile has an exposed section above the ground, the height of which is between 300mm and 500mm.

4. The method for driving pipe piles with sealed pile cores as described in claim 1, characterized in that, In construction step 4), the backfill section is pressed against the stopper plate from top to bottom.

5. The method for driving pipe piles with sealed pile cores as described in claim 1, characterized in that, The bottom of the pile driver has a pressure plate, and a pin extends downward from the center of the pressure plate; in construction step 3), the pressure plate is pressed against the top of the pipe pile, the pin is inserted into the pile core from top to bottom, and there is a pile driving interval between the pin and the plug plate.

6. The method for driving pipe piles with sealed pile cores as described in claim 5, characterized in that, In construction step 2), after the plug plate is placed in the installation position, the inner side of the wedge is embedded in the groove, the inclined surface abuts against the bottom of the groove, the upright surface abuts against the inner wall of the pile core, and the outer periphery of the plug plate abuts against the inner wall of the pile core.

7. The method for driving pipe piles with core sealing as described in any one of claims 1 to 6, characterized in that, In construction step 2), the two wedges are placed in the installation position by holding the middle of the lifting rope; after the stopper plate is placed in the installation position and the inner sides of the two wedges are embedded in the groove, the two wedges are driven to move upward synchronously by pulling the middle of the lifting rope upward. When the two wedges are driven to move upward synchronously by pulling the lifting rope upward, they press down against the middle of the plug plate, driving the plug plate to move downward synchronously. The wedges and the plug plate move in an up-down misalignment until the plug plate and the wedges are relatively fixed in the pile core.

8. The method for driving pipe piles with sealed pile cores as described in claim 7, characterized in that, In construction step 2), after the plug plate is fixed in the pile core, the pressure wall presses against the inner wall of the pile core. In construction step 2), after the stopper plate is placed at the installation position, the drive rod is pre-rotated until the bottom of the drive rod abuts against the middle of the stopper plate, the elastic pad of the horizontal rod abuts against the upper extension of the wedge, and the lifting rope is in a straight state. As the drive rod continues to rotate downwards a set distance, the bottom pressure plate of the drive rod moves downwards, and the lifting rope pulls the two wedges upwards. As the wedges move upwards, the elastic pad is compressed and deformed by the upper extension.

9. The method for driving pipe piles with sealed pile cores as described in claim 8, characterized in that, In construction step 2), after the drive rod passes through the threaded cylinder, it passes through multiple hollow cylinders from top to bottom; during the downward rotation of the drive rod, the lifting ropes converge towards each other, and the springs on both sides of the hollow cylinder are stretched, applying tension to the lifting ropes to assist in driving the wedge to move upward.

Images