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CN-117661578-B - Pile core closed tubular pile delivery construction method

CN117661578BCN 117661578 BCN117661578 BCN 117661578BCN-117661578-B

Abstract

The invention relates to the technical field of pipe piles and discloses a pile core closed pipe pile delivery construction method which comprises the following construction steps of 1) downwards constructing a pipe pile in a soil layer, wherein the inside of the pipe pile is provided with a pile core, the bottom of the pipe pile is embedded in the soil body, the top of the pipe pile is exposed above the ground, 2) embedding a pintle device in the upper part of the pile core, the pintle device seals the pile core, a spacing section is arranged between the pintle device and the top of the pipe pile, 3) installing a pile delivery device on the top of the pipe pile, driving the pipe pile downwards until the top of the pipe pile is embedded in a set position in the soil body, forming an empty pile section above the pipe pile, enabling the empty pile section to penetrate upwards to the ground, 4) removing the pile delivery device, backfilling the empty pile section by backfilling soil to form a backfilling section, and enabling the backfilling section to be pressed on the pintle device from top to bottom. Like this, seal the stake core through pintle wares, avoid after the pile follower is torn open, the stake core is filled by earth or grout, leads to later stage steel reinforcement cage and filling core concrete unable construction.

Inventors

  • FANG JIANGFENG
  • ZHANG FENGMIN
  • Liao huanyu
  • WAN YAN
  • DU QI
  • LIN XIAOQI
  • WANG CHUANLONG

Assignees

  • 深圳宏业基岩土科技股份有限公司

Dates

Publication Date
20260505
Application Date
20231128

Claims (9)

  1. 1. The pile core-closed tubular pile conveying construction method is characterized by comprising the following construction steps: 1) The pile is constructed downwards in the soil layer, and a pile core is arranged in the pile; 2) Embedding pintle devices in the upper part of the pile core, wherein the pintle devices are used for sealing the pile core, and a spacing section is arranged between the pintle devices and the top of the pipe pile; 3) A pile driver is arranged at the top of the pipe pile, the pile driver drives the pipe pile downwards until the top of the pipe pile is embedded into a set position in soil, an empty pile section is formed above the pipe pile, and the empty pile section upwards penetrates to the ground; 4) Removing the pile driver, and backfilling the blank pile section by using backfill soil to form a backfill section, wherein the backfill section is propped against the pintle device from top to bottom; In the construction step 2), after the wedges are placed at two sides of the mounting position, the plug plates are placed at the mounting position, the inner sides of the two wedges are embedded in the plug plates, the outer sides of the wedges are abutted against the inner side wall of the pile core, and the periphery of the plug plates are abutted against the inner side wall of the pile core; The outer side of the wedge is provided with a straight vertical surface, the inner side of the wedge is provided with an inclined surface, and the wedge is obliquely arranged inwards along the direction from top to bottom; in the construction step 2), after the wedges are embedded in the grooves, the two wedges are driven to synchronously move upwards, and the plug plate is driven to synchronously move downwards until the plug plate and the wedges are relatively fixed in the pile core; a lifting rope is connected between the two wedges, and two ends of the lifting rope are correspondingly connected with the two wedges respectively; The periphery of the plug board is provided with a pressing wall, the pressing wall is formed between two grooves, the middle part of the lifting rope is provided with a threaded cylinder which is longitudinally arranged, a driving rod is arranged in the threaded cylinder in a penetrating way, the driving rod is in threaded connection with the threaded cylinder, the driving rod is provided with a lower section positioned below the threaded cylinder and an upper section positioned above the threaded cylinder, the periphery of the lower section is sleeved with a positioning cylinder, two sides of the positioning cylinder are respectively outwards extended with horizontal rods which are horizontally arranged, and the outer end of each horizontal rod is provided with an elastic pad; the lower part of the thread cylinder is provided with a plurality of hollow cylinders which are arranged at intervals up and down, two sides of the hollow cylinder are respectively provided with a spring, the upper ends of the springs are butted at the outer sides of the hollow cylinder, the lower ends of the springs are butted on the lifting rope, and the springs are arranged in an outward inclined mode along the direction from top to bottom.
  2. 2. The pile-driving construction method for pile core closure according to claim 1, wherein in the construction step 1), after the pile is driven down into the soil layer, the cement paste in the pile core is cleaned.
  3. 3. The pile-driving construction method of pile core closure according to claim 1, wherein after the pile is lowered into the soil layer, the top of the pile has an exposed section exposed above the ground, and the exposed section has a height of 300mm-500 mm.
  4. 4. The pile-driving construction method of pile core closure according to claim 1, wherein in the construction step 4), the backfill section is pressed against the plug plate from top to bottom.
  5. 5. The pile driving construction method of pile core closed tubular pile according to claim 1, wherein the pile driver has a pressing plate at the bottom, a bolt extending downward from the center of the pressing plate, and in the construction step 3), the pressing plate is pressed against the top of the tubular pile, the bolt is inserted into the pile core from top to bottom, and a pile driving space is provided between the bolt and the plug.
  6. 6. A pile casing construction method according to claim 5, wherein in construction step 2) the inner side of the wedge is embedded in the groove when the plug is in the installed position, the inclined surface is inclined against the bottom of the groove, the upstanding surface is against the inner side wall of the pile core, and the periphery of the plug is against the inner side wall of the pile core.
  7. 7. A pile core closed tubular pile driving construction method according to any one of claims 1 to 6, characterised in that in construction step 2) two of said cleats are placed in an installed position by lifting the middle of said lifting rope; when the plug board is placed at the installation position, and the inner sides of the two wedges are embedded in the groove, the two wedges are driven to synchronously move upwards by pulling the middle part of the lifting rope upwards; when the lifting rope is pulled upwards to drive the two wedges to synchronously move upwards, the two wedges downwards abut against the middle part of the plug plate, the plug plate is driven to synchronously move downwards, and the wedges and the plug plate move in an up-and-down dislocation manner until the plug plate and the wedges are relatively fixed in the pile core.
  8. 8. The pile-driving construction method of pile core closure according to claim 7, wherein in the construction step 2), the pressing wall is pressed against the inner side wall of the pile core after the plug board is relatively fixed in the pile core; in the construction step 2), after the plug board is placed at the installation position, the driving rod is pre-rotated until the bottom of the driving rod is abutted against the middle part of the plug board, the elastic pad of the horizontal rod is abutted against the upper extension section of the wedge, and the lifting rope is in a straightening state; and in the process of continuously rotating the driving rod downwards for a set distance, the bottom of the driving rod props against the plug plate to move downwards, the lifting rope pulls the two wedges to move upwards, the two wedges move upwards along with the lifting rope, and the elastic cushion is propped against compression deformation by the upper extension section.
  9. 9. The pile driving construction method for pile core closure according to claim 8, wherein in the construction step 2), the driving rod passes through the plurality of hollow cylinders from top to bottom after passing through the threaded cylinders, and in the process of rotating the driving rod downwards, the lifting ropes are folded in opposite directions, and springs on two sides of the hollow cylinders are stretched to exert a pulling force on the lifting ropes to assist in driving the wedges to move upwards.

Description

Pile core closed tubular pile delivery construction method Technical Field The invention relates to the technical field of tubular piles, in particular to a tubular pile conveying construction method for pile core sealing. Background Pile core refers to the circular part in the middle of pile body of pile, and is commonly used in pile foundation engineering. In the construction process, the pile core of the pipe pile has the function of reinforcing the strength and bearing capacity of the pile body, and can be used as a pouring template of pile body concrete. In the prior art, in the pipe pile construction process, when the construction operation surface is higher than the designed pile top elevation, the special pile follower is required to convey the pipe pile to the designed elevation, after the pile follower is pulled out, the pile core is easy to be filled with soil or cement paste, so that the later-stage reinforcement cage and core filling concrete cannot be constructed, measures are required to be taken to clean the pile core of the pipe pile before construction, and the cleaning process is time-consuming and labor-consuming. Disclosure of Invention The invention aims to provide a pile core closed tubular pile driving construction method, and aims to solve the problem that in the prior art, after a pile driver is pulled out, a pile core is easy to be filled with soil or cement paste. The invention discloses a pile-driving construction method for a pile core-sealed pipe pile, which comprises the following construction steps: 1) The pile is constructed downwards in the soil layer, and a pile core is arranged in the pile; 2) Embedding pintle devices in the upper part of the pile core, wherein the pintle devices are used for sealing the pile core, and a spacing section is arranged between the pintle devices and the top of the pipe pile; 3) A pile driver is arranged at the top of the pipe pile, the pile driver drives the pipe pile downwards until the top of the pipe pile is embedded into a set position in soil, an empty pile section is formed above the pipe pile, and the empty pile section upwards penetrates to the ground; 4) And removing the pile driver, backfilling the blank pile section by using backfill soil to form a backfill section, wherein the backfill section is propped against the pintle device from top to bottom. Optionally, in the construction step 1), after the pipe pile is downward placed in the soil layer, the cement slurry in the pile core is cleaned. Optionally, after the pipe pile is downwards put into the soil layer, the top of the pipe pile is provided with an exposed section exposed above the ground, and the height of the exposed section is 300-500 mm. Optionally, the upper part of the pile core is provided with an installation position, the pintle device comprises a plug plate and two wedges, in the construction step 2), after the wedges are placed on two 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 are abutted against the inner side wall of the pile core, and the periphery of the plug plate is abutted against the inner side wall of the pile core; The plug plate and the two wedges are fixed at the installation position of the pile core, the pile core is sealed by the plug plate and the two wedges, and in the construction step 4), the backfill section is propped against the plug plate from top to bottom. Optionally, the pile driver has a pressing plate at the bottom, a pin extending downwards from the center of the pressing plate, and in the step 3), the pressing plate is pressed against the top of the pile, the pin is inserted into the pile core from top to bottom, and a pile driving space is provided between the pin and the plug. Optionally, the outer side of the wedge is provided with a vertical surface, the inner side of the wedge is provided with an inclined surface, and the wedge is obliquely arranged inwards along the direction from top to bottom; In the construction step 2), after the plug plate is placed at the installation position, the inner side of the wedge is embedded in the groove, the inclined surface is obliquely abutted against the bottom of the groove, the vertical surface is abutted against the inner side wall of the pile core, and the periphery of the plug plate is abutted against the inner side wall of the pile core. Optionally, in the construction step 2), after the wedges are embedded in the grooves, the two wedges are driven to synchronously move upwards, and the plug plate is driven to synchronously move downwards until the plug plate and the wedges are relatively fixed in the pile core. In the construction step 2), the two wedges are placed at the installation position by lifting the middle part of the lifting rope, and after the plug plate is placed at the installation position and the inner sides of the two wedges a