CN-121992780-A - Pile head control quick breaking construction method for row piles

CN121992780ACN 121992780 ACN121992780 ACN 121992780ACN-121992780-A

Abstract

The invention discloses a method for controllably and rapidly breaking pile heads of row piles, which comprises the following steps of cleaning earth covered around piles; the pile breaking elevation guiding and measuring and double control line mark comprises the steps of arranging pile top design elevation control lines and circular cutting seam control lines at intervals from bottom to top, obtaining circular cutting seams which are arranged along the circumferential direction of a pile body and are continuously closed based on the circular cutting seam control lines, performing layered breaking construction by a pile breaker, namely performing layered breaking to the circular cutting seams, performing manual pile head trimming and forming control, namely trimming the pile head section to the pile top design elevation control lines, performing quality inspection and finished product protection. The pile head breaking height and the breaking range are controllable as cores, and the problems of low efficiency, poor construction quality stability and high construction cost in the prior art are solved by combining the positioning of the circular cutting and cutting seams, the mechanical layered breaking and the manual finishing, so that the pile head concrete is efficiently, safely and controllably broken.

Inventors

WU SHIGUANG
FENG TAO
GAO JUN
LIU MENGLU
SHAO XIANG
TANG XIONG
WANG JUNZHENG
Chai Huayang
XIONG SHENGYUAN

Assignees

中国水利水电第五工程局有限公司

Dates

Publication Date: 20260508
Application Date: 20260326

Claims (10)

1. The method for controllably and rapidly breaking the pile head of the row pile is characterized by comprising the following steps of: pile head reinforcing steel bar sleeve; cleaning the soil covered around the piles; The broken elevation guiding and measuring and the double control line mark are that pile top design elevation control lines and circular cutting seam control lines are arranged at intervals from bottom to top; A circular cutting seam is formed by cutting a seam based on a circular cutting seam control line, so as to obtain a circular cutting seam which is circumferentially arranged along the pile body and is continuously closed; Layered breaking construction of pile breaker: layering and breaking until the ring-cutting slit is formed; Manually trimming and molding the pile head, namely trimming the pile head section to a pile top design elevation control line; Quality inspection and acceptance and finished product protection.
2. The method for controllably and rapidly breaking pile heads of row piles according to claim 1, wherein the method comprises the following steps based on circular cutting slits: Positioning, namely shallow cutting and positioning of a concrete cutting machine; Continuous cutting, namely cutting and forming the concrete according to the design depth by a concrete cutting machine; the design size of the circular cutting seam is that the cutting seam width is controlled to be 8-12 mm, and the deviation of the cutting seam position is not more than +/-5 mm.
3. The method for controllably and rapidly breaking pile heads of row piles according to claim 1, wherein the layered breaking construction based on a pile breaker comprises the following steps: the upper layer operation, namely layering extrusion and shearing breaking from top to bottom, so that the concrete is broken layer by layer and naturally stripped; And (3) performing lower layer operation, namely controlling the breaking force and the operation rhythm when the breaking is close to the position of the circular cutting joint, so that the pile head concrete is naturally broken along the joint.
4. The method for controllably and rapidly breaking pile heads of row piles according to claim 3, wherein in the upper layer operation, the single-layer breaking thickness is controlled to be 200-300 mm; In lower layer operation, breaking force comprises working pressure and single module bursting force, and operation rhythm comprises pressurizing time length, pressure maintaining time and circulation times of each wheel.
5. The method for quickly breaking pile heads of row piles under control according to claim 1, wherein the pile head reinforcement sleeve comprises sleeving pile head reinforcement sections above the designed elevation of pile tops before a reinforcement cage is manufactured and lowered into a pile hole; the pile periphery earthing cleaning comprises digging the pile Zhou Futu until the pile head and the periphery form an operation space meeting the equipment operation requirement, and controlling the pile digging depth to be 50-100 mm below the pile top design elevation.
6. The method for controllably and rapidly breaking pile heads of row piles according to claim 1, wherein the method comprises the following steps of: the pile head design breaking elevation is guided to the surface of the pile body; Marking two control lines along the circumferential direction of the pile body; The two control lines are respectively a pile top design elevation control line for controlling the final section position of the pile head and a circular cutting seam control line for positioning circular cutting seam construction and confirming a pile head breaking interface.
7. The method for controllably and rapidly breaking pile heads of row piles according to claim 6, wherein a total station or a level gauge is selected to guide the designed breaking elevation of the pile heads to the surface of the pile body; The pile top design elevation control line is shifted upwards by 20-30 mm in parallel, and a circular cutting seam control line is arranged.
8. The method for quickly breaking pile heads of row piles under the control of the pile heads according to claim 1 is characterized by comprising the steps of removing residual concrete, adjusting local height difference until the allowable deviation of the final elevation of the pile heads is controlled within the range of +0 to-10 mm.
9. The method for controlled rapid breaking of pile heads for row piles according to claim 8, wherein the residual concrete is cleaned by using an electric pick, a pneumatic pick or a concrete cutting machine based on manual trimming and forming control of pile heads, and the local height difference is adjusted by using a chisel, a hammer, an angle grinder or a fine grinder.
10. The method for the controlled rapid breaking construction of the pile head of the row pile according to claim 1, wherein the method comprises the following steps based on quality acceptance and finished product protection: quality acceptance, namely, acceptance construction quality is inspected based on pile top elevation control, pile top flatness and integrity, steel bar state, sounding pipe protection and identification and/or low strain detection; And (3) protecting the finished product, namely protecting the constructed pile head based on temporary covering protection, anti-collision protection, drainage management, steel bar rust prevention treatment and/or procedure connection.

Description

Pile head control quick breaking construction method for row piles Technical Field The invention relates to the technical field of row pile construction, in particular to a control rapid breaking construction method for a row pile head. Background Along with the continuous expansion of the construction scale of highway engineering, a great deal of pile-arranging retaining structures are adopted in the highway engineering in mountain areas and under complex geological conditions so as to meet the engineering demands of high slopes, skid resistance, roadbed stabilization and the like. The row pile retaining structure is generally formed by arranging a plurality of pile bodies in rows at certain intervals, and an integral stress system is formed through a crown beam or a soil retaining structure, and the construction quality of the pile retaining structure is directly related to the integral safety and durability of the retaining structure. In the construction process of the row pile retaining structure, after pile foundations are completed and reach the design strength, pile head concrete above the designed elevation of the pile top is required to be broken so as to expose reinforcing steel bars and be reliably connected with the upper retaining structure. The pile head breaking construction belongs to a key working procedure in the construction of a row pile retaining structure, and the construction precision, the forming quality and the construction efficiency of the pile head breaking construction have important influences on the subsequent structure construction and the whole construction period. At present, the pile row supporting and retaining structure of highway engineering mostly adopts a bored pile form with smaller pile diameter and denser pile distance, and the pile head is often required to be integrally cast and formed with a crown beam, a retaining wall or other supporting and retaining members, so that higher requirements are put forward on pile head breaking elevation, section flatness and a reinforcing steel bar exposed state. However, in actual construction, the problems of low efficiency, large quality fluctuation and the like of pile head breaking construction are easily caused by factors such as limited working space, large number of pile foundations, complex construction organization and the like, and the pile head breaking construction becomes one of important factors for restricting the construction quality and progress of a pile-arranging retaining structure. Therefore, the research and development of the pile head breaking method which is efficient, accurate and good in pile body and reinforcing steel bar protection effect has important practical significance. Disclosure of Invention The invention aims to solve the technical problems of high efficiency, high accuracy and good protection effect on pile bodies and reinforcing steel bars and aims to provide a rapid control breaking construction method for pile heads of row piles so as to solve the problems. The invention is realized by the following technical scheme: a method for controllably and rapidly breaking a pile head of a row pile comprises the following steps: pile head reinforcing steel bar sleeve; cleaning the soil covered around the piles; The broken elevation guiding and measuring and the double control line mark are that pile top design elevation control lines and circular cutting seam control lines are arranged at intervals from bottom to top; A circular cutting seam is formed by cutting a seam based on a circular cutting seam control line, so as to obtain a circular cutting seam which is circumferentially arranged along the pile body and is continuously closed; Layered breaking construction of pile breaker: layering and breaking until the ring-cutting slit is formed; Manually trimming and molding the pile head, namely trimming the pile head section to a pile top design elevation control line; Quality inspection and acceptance and finished product protection. In one possible design, the method is based on circular cutting slits, and comprises the following steps: Positioning, namely shallow cutting and positioning of a concrete cutting machine; Continuous cutting, namely cutting and forming the concrete according to the design depth by a concrete cutting machine; the design size of the circular cutting seam is that the cutting seam width is controlled to be 8-12 mm, and the deviation of the cutting seam position is not more than +/-5 mm. In one possible design, the layered breaking construction based on the pile breaker comprises the following steps: the upper layer operation, namely layering extrusion and shearing breaking from top to bottom, so that the concrete is broken layer by layer and naturally stripped; And (3) performing lower layer operation, namely controlling the breaking force and the operation rhythm when the breaking is close to the position of the circular cutting joint, so that the pile head concrete is