CN116043904B - Device and method for guaranteeing stability of pole tower foundation - Google Patents

Device and method for guaranteeing stability of pole tower foundation Download PDF

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Publication number
CN116043904B
CN116043904B CN202211390081.1A CN202211390081A CN116043904B CN 116043904 B CN116043904 B CN 116043904B CN 202211390081 A CN202211390081 A CN 202211390081A CN 116043904 B CN116043904 B CN 116043904B
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Prior art keywords
pile
steel
cast
foundation
filling pile
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CN202211390081.1A
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CN116043904A (en
Inventor
周英博
盛根林
乔诗慧
全江涛
陈然
殷建刚
余宏桥
段志强
陈航
李智威
熊川羽
周蠡
蔡杰
许汉平
高晓晶
李吕满
马莉
孙利平
廖晓红
张赵阳
王巍
熊一
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State Grid Hubei Electric Power Co Ltd
Economic and Technological Research Institute of State Grid Hubei Electric Power Co Ltd
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State Grid Hubei Electric Power Co Ltd
Economic and Technological Research Institute of State Grid Hubei Electric Power Co Ltd
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Priority to CN202211390081.1A priority Critical patent/CN116043904B/en
Publication of CN116043904A publication Critical patent/CN116043904A/en
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00—Foundations as substructures
    • E02D27/32—Foundations for special purposes
    • E02D27/42—Foundations for poles, masts or chimneys
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D1/00—Investigation of foundation soil in situ
    • E02D1/08—Investigation of foundation soil in situ after finishing the foundation structure
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D33/00—Testing foundations or foundation structures
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22—Piles
    • E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2600/00—Miscellaneous
    • E02D2600/10—Miscellaneous comprising sensor means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Structural Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Soil Sciences (AREA)
  • Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)

Abstract

A device and a method for guaranteeing the stability of a tower foundation, wherein the device comprises the tower foundation, a filling pile, a stretching mechanism and a monitoring system; the monitoring system comprises a displacement sensor, a pressure sensor, a telemetering water level gauge and a computer; the tower foundation comprises a precast pile and a steel beam, wherein the top of the precast pile is connected with the bottom of the tower, the bottom of the precast pile is connected with the top of the steel beam, displacement sensors are arranged on two sides of the top of the steel beam, a pressure sensor is arranged at the bottom of the steel beam, and a telemetering fluviograph is arranged on the end face of the steel beam; the first filling pile and the second filling pile are respectively positioned in the middle part and at the side of the foundation of the tower, the top of the filling pile is provided with a track, and the side surface of the top of the first filling pile is provided with a pull ring; the stretching mechanism comprises a steel strand, a track beam and a winch, wherein two ends of the steel strand are respectively connected with the steel beam and the pull ring, the track beam is matched with the track, and the winch is arranged on the track beam. The design can not only monitor the stability change of the tower foundation in advance, but also maintain the stability of the tower foundation in the tower foundation remediation process.

Description

Device and method for guaranteeing stability of pole tower foundation
Technical Field
The invention relates to the technical field of tower foundations, in particular to a device and a method for guaranteeing stability of a tower foundation.
Background
The tower foundation is used as a skeleton foundation of the power transmission system, plays an irreplaceable role in maintaining the stability of the tower and transmitting loads, and along with the development of national power industry, more and more towers are required to be built in the area where the trails are rare, so that the manpower and material resources for maintaining the stability and safety of the tower during operation are greatly increased. A large number of transmission line accidents also show that the high-voltage tower is extremely easy to be influenced by external factors to topple and collapse, and the high-voltage tower is extremely threatening the stable development of national economy and society. Therefore, remedial measures before the tower foundation is damaged are necessary, and ensuring the stability of the tower foundation during the remedial process is important.
At present, the traditional technology is to remedy after the tower foundation is obviously deformed, and the operation period of the tower is greatly shortened and the injury of constructors is possibly caused during the remedy. Therefore, the current construction of the pole tower needs to take important consideration of remedying before the pole tower foundation is obviously damaged and maintaining the stability of the pole tower foundation in the remedying process.
Disclosure of Invention
The invention aims to overcome the defects and problems that the stability change of a tower foundation cannot be monitored in advance and the stability of the tower foundation cannot be maintained in the tower foundation remediation process in the prior art, and provides a device and a method for guaranteeing the stability of the tower foundation, wherein the device and the method can monitor the stability change of the tower foundation in advance and the stability of the tower foundation can be maintained in the tower foundation remediation process.
In order to achieve the above object, the technical solution of the present invention is: a device for guaranteeing the stability of a tower foundation comprises a tower foundation, a cast-in-place pile, a stretching mechanism and a monitoring system;
the monitoring system comprises a displacement sensor, a pressure sensor and a computer, wherein the computer is respectively connected with the displacement sensor and the pressure sensor through signals;
the tower foundation comprises precast piles and steel beams, wherein the precast piles are positioned below the ground surface, the tops of the precast piles are connected with the bottoms of the towers, the bottoms of the precast piles are connected with the tops of the steel beams, displacement sensors are arranged on two sides of the tops of the steel beams, and a plurality of pressure sensors are uniformly arranged at the bottoms of the steel beams;
the cast-in-place pile comprises a first cast-in-place pile and two second cast-in-place piles, wherein the first cast-in-place pile is positioned in the middle of a tower foundation, the two second cast-in-place piles are respectively positioned on two sides of the tower foundation, one ends of the first cast-in-place pile and the second cast-in-place pile are positioned below the ground surface, the other ends of the first cast-in-place pile and the second cast-in-place pile are positioned above the ground surface, a track is arranged on the end face of the other ends of the first cast-in-place pile and the second cast-in-place pile, and a pull ring is arranged on the side face of the other end of the first cast-in-place pile;
the stretching mechanism comprises a steel strand, a track beam and a winch, one end of the steel strand is connected with the end of the steel strand, the other end of the steel strand is connected with a pull ring, the track beam is matched with the track, and the winch is mounted on the track beam.
The monitoring system further comprises a telemetering water level gauge for monitoring the foundation soil water content, the telemetering water level gauge is arranged on the end face of the steel beam, and the telemetering water level gauge is connected with a computer through signals.
The side at the top of the first filling pile is provided with a placement box, and a plurality of pull rings are arranged in the placement box.
The first filling pile and the second filling pile are located on the same plane, and the plane is perpendicular to the plane where the steel beam is located.
The size of the first filling pile and the second filling pile is the same, the length of the part, above the ground surface, of the first filling pile and the second filling pile is 0.5-1 m, the diameter of the first filling pile and the second filling pile is 1.5-2 times of the diameter of the prefabricated pile, and the length of the first filling pile and the second filling pile is 3-5 times of the length of the prefabricated pile.
The number of the steel beams is two, the two steel beams are symmetrically arranged, two precast piles are vertically connected to the steel beams, and the four precast piles are arranged in a rectangular mode.
The steel strands are connected at two ends of the steel beam, the steel strands at two ends of one steel beam are connected with the pull ring at one side of the cast-in-place pile, and the steel strands at two ends of the other steel beam are connected with the pull ring at the other side of the cast-in-place pile.
The top both sides of girder steel all are provided with the protection box, are provided with displacement sensor in the protection box.
A method for ensuring the stability of a tower foundation, which is applied to the device, the method comprises the following steps:
s1, after a foundation is excavated, constructing and maintaining a first filling pile and a second filling pile, removing a mould after the strength of the first filling pile and the second filling pile reach the standard, and installing a track and a pull ring on the top of the first filling pile and a track on the top of the second filling pile;
s2, assembling the precast pile and the steel beam, simultaneously installing displacement sensors on two sides of the top of the steel beam, installing pressure sensors on the bottom of the steel beam, and then placing the assembled tower foundation at a designated position;
s3, firstly pulling out steel strands from two ends of a steel beam to be connected with pull rings on a first filling pile, backfilling soil bodies in layers, then installing a pole tower on the top of a precast pile, finally starting a computer, and recording initial values of a displacement sensor and a pressure sensor;
s4, when the soil body at the lower part of the tower foundation loosens or collapses, the tower foundation moves downwards, the numerical value of the pressure sensor is fused, the numerical value of the displacement sensor is correspondingly changed, and at the moment, the computer gives an alarm;
s5, firstly, installing a track beam on a track at the top of a first filling pile and a second filling pile, installing a winch on the track beam, connecting a steel strand connected with a pull ring to the winch, starting the winch, pulling the steel strand by the winch to adjust the position of the steel beam, simultaneously, observing the numerical change of a displacement sensor in real time, and stopping pulling the steel strand by the winch when the numerical value of the displacement sensor returns to an initial value, wherein the winch pulls the steel strand to ensure that the stability of a tower foundation is unchanged;
s6, firstly surveying the soil near the foundation of the tower by utilizing the detection device, excavating the soil needing secondary remediation, controlling the winch to release the steel strand after the soil is treated, then detaching the steel strand from the winch and connecting the steel strand to the pull ring, and then detaching the winch and the track beam.
The monitoring system further comprises a telemetering water level gauge for monitoring the water content of foundation soil, wherein the telemetering water level gauge is arranged on the end face of the steel beam and is in signal connection with the computer;
in the step S2, a telemetering water level gauge is arranged on the end face of the steel beam;
in step S4, when the remote measuring water level gauge monitors that the water content of the foundation soil exceeds 35%, the computer gives an alarm.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the device and the method for guaranteeing the stability of the tower foundation, when the soil body at the lower part of the tower foundation loosens or collapses, the tower foundation moves downwards, the numerical value of the pressure sensor is subjected to fusion, the numerical value of the displacement sensor is correspondingly changed, at the moment, the computer sends out an alarm to predict the damage nearby the tower foundation in advance, and therefore the repair is carried out before the damage of the tower foundation; in the remediation process, the steel strand connected with the pull ring is connected to the winch, the winch is started, the winch pulls the steel strand to adjust the position of the steel beam, meanwhile, the numerical change of the displacement sensor is observed in real time, when the numerical value of the displacement sensor returns to an initial value, the winch stops pulling the steel strand, at the moment, the winch pulls the steel strand to ensure that the stability of the tower foundation is unchanged, and finally, the soil needing secondary remediation is excavated, so that the stability of the tower foundation is kept unchanged in the remediation process. Therefore, the invention not only can monitor the stability change of the tower foundation in advance, but also can maintain the stability of the tower foundation in the process of remedying the tower foundation.
2. According to the device and the method for guaranteeing the stability of the foundation of the tower, the telemetering water level gauge is arranged on the end face of the steel beam and is in signal connection with the computer, and when the telemetering water level gauge monitors that the water content of foundation soil exceeds 35%, the computer gives an alarm so as to further improve the monitoring precision of the device. Therefore, the invention has high monitoring precision.
3. The invention relates to a device and a method for guaranteeing the stability of a tower foundation, wherein a cast-in-place pile comprises a first cast-in-place pile and two second cast-in-place piles, the first cast-in-place pile is positioned in the middle of the tower foundation, the two second cast-in-place piles are respectively positioned on two sides of the tower foundation, the second cast-in-place pile and the first cast-in-place pile are positioned on the same plane, the plane is perpendicular to the plane of a steel beam, rails are arranged at the tops of the first cast-in-place pile and the second cast-in-place pile, and the cast-in-place pile with the structure has high structural strength and good stability, and can guarantee that a winch can reliably pull steel strands to adjust the position of the steel beam; the side surface of the top of the first filling pile is provided with the placement box, and the placement box is internally provided with a plurality of pull rings, so that the installation and the disassembly are simple and convenient, and the position of the steel strand is convenient to adjust; the length of the part of the first filling pile and the second filling pile above the ground surface is 0.5-1 m, so that the winch and the track beam are convenient to install and disassemble, and the winch can reliably pull the steel strands to adjust the position of the steel beam; the diameters of the first filling pile and the second filling pile are 1.5-2 times of the diameters of the prefabricated piles, and the lengths of the first filling pile and the second filling pile are 3-5 times of the lengths of the prefabricated piles. Therefore, the invention has high structural strength, good stability, simple and convenient installation and disassembly, simple and convenient operation and high reliability.
4. According to the device and the method for guaranteeing the stability of the tower foundation, the number of the steel beams is two, the two steel beams are symmetrically arranged, the two precast piles are vertically connected to the steel beams, the four precast piles are arranged in a rectangular mode, steel strands are connected to the two ends of each steel beam, the steel strands at the two ends of one steel beam are connected with the pull ring at one side of the first filling pile, and the steel strands at the two ends of the other steel beam are connected with the pull ring at the other side of the first filling pile; the top both sides of girder steel all are provided with the protection box, are provided with displacement sensor in the protection box, add the protection box in order to prevent that displacement sensor from receiving the damage to improve displacement sensor's monitoring accuracy. Therefore, the invention has good stability and high reliability.
Drawings
Fig. 1 is a schematic perspective view of the present invention.
Fig. 2 is a front view of the present invention.
Fig. 3 is a side view of the present invention.
Fig. 4 is a schematic perspective view of a first filling pile according to the present invention.
Fig. 5 is a cross-sectional view taken along A-A of fig. 3.
Fig. 6 is a side view of the operation of the stretching mechanism of the present invention.
Fig. 7 is a cross-sectional view taken along B-B of fig. 6.
In the figure: precast pile 1, girder steel 2, protection box 3, shaft tower 4, bored concrete pile 5, first bored concrete pile 51, second bored concrete pile 52, track 6, settling box 7, pull ring 8, steel strand 9, track roof beam 10, hoist 11, displacement sensor 12, pressure sensor 13, telemetering measurement fluviograph 14, computer 15, ground surface 16.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings and detailed description.
Referring to fig. 1 to 7, a device for guaranteeing stability of a tower foundation includes a tower foundation, a cast-in-place pile 5, a stretching mechanism and a monitoring system;
the monitoring system comprises a displacement sensor 12, a pressure sensor 13 and a computer 15, wherein the computer 15 is respectively connected with the displacement sensor 12 and the pressure sensor 13 in a signal manner;
the tower foundation comprises a precast pile 1 and a steel beam 2, wherein the precast pile 1 is positioned below the ground surface 16, the top of the precast pile 1 is connected with the bottom of the tower 4, the bottom of the precast pile 1 is connected with the top of the steel beam 2, displacement sensors 12 are arranged on two sides of the top of the steel beam 2, and a plurality of pressure sensors 13 are uniformly arranged at the bottom of the steel beam 2;
the cast-in-place pile 5 comprises a first cast-in-place pile 51 and two second cast-in-place piles 52, wherein the first cast-in-place pile 51 is positioned in the middle of a tower foundation, the two second cast-in-place piles 52 are respectively positioned on two sides of the tower foundation, one ends of the first cast-in-place pile 51 and the second cast-in-place pile 52 are positioned below the ground surface 16, the other ends of the first cast-in-place pile 51 and the second cast-in-place pile 52 are positioned above the ground surface 16, the end surfaces of the other ends of the first cast-in-place pile 51 and the second cast-in-place pile 52 are provided with rails 6, and the side surface of the other end of the first cast-in-place pile 51 is provided with pull rings 8;
the stretching mechanism comprises a steel strand 9, a track beam 10 and a winch 11, one end of the steel strand 9 is connected with the end part of the steel beam 2, the other end of the steel strand 9 is connected with a pull ring 8, the track beam 10 is matched with the track 6, and the winch 11 is arranged on the track beam 10.
The monitoring system further comprises a telemetering water gauge 14 for monitoring the water content of foundation soil, the telemetering water gauge 14 is arranged on the end face of the steel beam 2, and the telemetering water gauge 14 is in signal connection with a computer 15.
The side at the top of the first filling pile 51 is provided with a placement box 7, and a plurality of pull rings 8 are arranged in the placement box 7.
The first cast-in-place pile 51 and the second cast-in-place pile 52 are located on the same plane, and the plane is perpendicular to the plane where the steel beam 2 is located.
The size of the first filling pile 51 and the second filling pile 52 is the same, the length of the part, above the ground surface 16, of the first filling pile 51 and the second filling pile 52 is 0.5-1 m, the diameter of the first filling pile 51 and the second filling pile 52 is 1.5-2 times of the diameter of the precast pile 1, and the length of the first filling pile 51 and the second filling pile 52 is 3-5 times of the length of the precast pile 1.
The number of the steel beams 2 is two, the two steel beams 2 are symmetrically arranged, two precast piles 1 are vertically connected to the steel beams 2, and the four precast piles 1 are arranged in a rectangular mode.
The steel strands 9 are connected to the two ends of the steel beam 2, the steel strands 9 at the two ends of one steel beam 2 are connected with the pull ring 8 at one side of the first cast-in-place pile 51, and the steel strands 9 at the two ends of the other steel beam 2 are connected with the pull ring 8 at the other side of the first cast-in-place pile 51.
The top both sides of girder steel 2 all are provided with protection box 3, are provided with displacement sensor 12 in the protection box 3.
A method for ensuring the stability of a tower foundation, which is applied to the device, the method comprises the following steps:
s1, after a foundation is excavated, constructing and maintaining a first filling pile 51 and a second filling pile 52, removing a mould after the strength of the first filling pile 51 and the second filling pile 52 reach the standard, and installing a track 6, a pull ring 8 and a track 6 at the top of the first filling pile 51 and the top of the second filling pile 52;
s2, assembling the precast pile 1 and the steel beam 2, simultaneously installing displacement sensors 12 on two sides of the top of the steel beam 2, installing a pressure sensor 13 on the bottom of the steel beam 2, and then placing the assembled tower foundation at a designated position;
s3, firstly pulling out steel strands 9 from two ends of a steel beam 2 to be connected with pull rings 8 on a first filling pile 51, backfilling soil in layers, then installing a pole tower 4 on the top of a precast pile 1, finally starting a computer 15, and recording initial values of a displacement sensor 12 and a pressure sensor 13;
s4, when the soil body at the lower part of the tower foundation loosens or collapses, the tower foundation moves downwards, the numerical value of the pressure sensor 13 is fused, the numerical value of the displacement sensor 12 is correspondingly changed, and at the moment, the computer 15 gives an alarm;
s5, firstly, installing a track beam 10 on a track 6 on the top of a first filling pile 51 and a second filling pile 52, installing a winch 11 on the track beam 10, then connecting a steel strand 9 connected with a pull ring 8 to the winch 11, then starting the winch 11, pulling the steel strand 9 by the winch 11 to adjust the position of the steel beam 2, simultaneously observing the change of the value of a displacement sensor 12 in real time, and stopping pulling the steel strand 9 by the winch 11 when the value of the displacement sensor 12 returns to an initial value, wherein the winch 11 pulls the steel strand 9 to ensure that the stability of a tower foundation is unchanged;
s6, firstly surveying the soil near the foundation of the tower by utilizing a detection device, excavating the soil needing secondary remediation, controlling a winch 11 to release the steel strand 9 after the soil is treated, detaching the steel strand 9 from the winch 11 and connecting the steel strand 9 to a pull ring 8, and then detaching the winch 11 and a track beam 10.
The monitoring system further comprises a telemetering water gauge 14 for monitoring the water content of foundation soil, wherein the telemetering water gauge 14 is arranged on the end face of the steel beam 2, and the telemetering water gauge 14 is in signal connection with a computer 15;
in step S2, a telemetering water level gauge 14 is installed on the end face of the steel beam 2;
in step S4, when the telemetry water level gauge 14 detects that the water content of the foundation soil exceeds 35%, the computer 15 gives an alarm.
The principle of the invention is explained as follows:
the traditional majority of methods are to remedy the tower foundation after the tower foundation is greatly deformed or obviously damaged, more manpower and material resources are consumed in the remediation process, and the stability of the tower foundation after the remediation is less than that of the tower foundation at the beginning of establishment, so that the operation period of the tower is shortened; the method can not only predict the damage near the tower foundation in advance, but also ensure the stability of the tower foundation to be unchanged in the whole process, and maintain the operation period of the tower.
According to the invention, the water content of the soil body at the lower part of the tower foundation is monitored through the telemetering water level gauge, the change condition of the soil body at the lower part of the tower foundation is monitored through the pressure sensor and the displacement monitor, and when the telemetering water level gauge monitors that the water content of the soil body exceeds 35%, or the monitored value of the pressure sensor suddenly changes, and meanwhile, the computer sends out an alarm mode when the displacement sensor obviously changes. After the alarm mode is sent out, a prefabricated track beam is arranged at the track of the top of the cast-in-place pile, then a winch is arranged in the middle of the track beam, steel strands on the first cast-in-place pile are respectively connected with each connecting hole of the winch, the winch provides pulling force to pull the steel strands, the initial position of the tower foundation is guaranteed to be unchanged, displacement is restored to an initial value, on the basis, a detection device is utilized to detect soil bodies near the tower foundation, after the position of the damaged soil bodies is determined, remediation is carried out, and the stability of the tower foundation is guaranteed to be unchanged by pulling the steel strands by the winch in the remediation process. After the remediation is completed, the winch and the track beam are disassembled and can be used for multiple times.
Example 1:
referring to fig. 1 to 7, a device for guaranteeing stability of a tower foundation includes a tower foundation, a cast-in-place pile 5, a stretching mechanism and a monitoring system; the monitoring system comprises a displacement sensor 12, a pressure sensor 13 and a computer 15, wherein the computer 15 is respectively connected with the displacement sensor 12 and the pressure sensor 13 in a signal manner; the tower foundation comprises a precast pile 1 and a steel beam 2, wherein the precast pile 1 is positioned below the ground surface 16, the top of the precast pile 1 is connected with the bottom of the tower 4, the bottom of the precast pile 1 is connected with the top of the steel beam 2, displacement sensors 12 are arranged on two sides of the top of the steel beam 2, and a plurality of pressure sensors 13 are uniformly arranged at the bottom of the steel beam 2; the cast-in-place pile 5 comprises a first cast-in-place pile 51 and two second cast-in-place piles 52, wherein the first cast-in-place pile 51 is positioned in the middle of a tower foundation, the two second cast-in-place piles 52 are respectively positioned on two sides of the tower foundation, one ends of the first cast-in-place pile 51 and the second cast-in-place pile 52 are positioned below the ground surface 16, the other ends of the first cast-in-place pile 51 and the second cast-in-place pile 52 are positioned above the ground surface 16, the end surfaces of the other ends of the first cast-in-place pile 51 and the second cast-in-place pile 52 are provided with rails 6, and the side surface of the other end of the first cast-in-place pile 51 is provided with pull rings 8; the stretching mechanism comprises a steel strand 9, a track beam 10 and a winch 11, one end of the steel strand 9 is connected with the end part of the steel beam 2, the other end of the steel strand 9 is connected with a pull ring 8, the track beam 10 is matched with the track 6, and the winch 11 is arranged on the track beam 10.
A method of ensuring stability of a pole foundation, the method comprising the steps of:
s1, after a foundation is excavated, constructing and maintaining a first filling pile 51 and a second filling pile 52, removing a mould after the strength of the first filling pile 51 and the second filling pile 52 reach the standard, and installing a track 6, a pull ring 8 and a track 6 at the top of the first filling pile 51 and the top of the second filling pile 52;
s2, assembling the precast pile 1 and the steel beam 2, simultaneously installing displacement sensors 12 on two sides of the top of the steel beam 2, installing a pressure sensor 13 on the bottom of the steel beam 2, and then placing the assembled tower foundation at a designated position;
s3, firstly pulling out steel strands 9 from two ends of a steel beam 2 to be connected with pull rings 8 on a first filling pile 51, backfilling soil in layers, then installing a pole tower 4 on the top of a precast pile 1, finally starting a computer 15, and recording initial values of a displacement sensor 12 and a pressure sensor 13;
s4, when external factors such as earthquake, karst development and the like act on a tower foundation, soil body at the lower part of the tower foundation loosens or a collapse area is generated, the tower foundation moves downwards, the numerical value of the pressure sensor 13 is subjected to fusion, the numerical value of the displacement sensor 12 is correspondingly changed, and at the moment, the computer 15 gives an alarm;
s5, firstly, installing a track beam 10 on a track 6 on the top of a first filling pile 51 and a second filling pile 52, installing a winch 11 on the track beam 10, then connecting a steel strand 9 connected with a pull ring 8 to the winch 11, then starting the winch 11, pulling the steel strand 9 by the winch 11 to adjust the position of the steel beam 2, simultaneously observing the change of the value of a displacement sensor 12 in real time, and stopping pulling the steel strand 9 by the winch 11 when the value of the displacement sensor 12 returns to an initial value, wherein the winch 11 pulls the steel strand 9 to ensure that the stability of a tower foundation is unchanged;
s6, firstly surveying the soil near the foundation of the tower by utilizing a detection device, excavating the soil needing secondary remediation, controlling a winch 11 to release the steel strand 9 after the soil is treated, detaching the steel strand 9 from the winch 11 and connecting the steel strand 9 to a pull ring 8, and then detaching the winch 11 and a track beam 10.
The device is used for guaranteeing the stability of the 500kV fishing two-circuit 18# tower foundation, but is not limited to the 500kV fishing two-circuit 18# tower, the device is suitable for various types of tower foundations, the stability of the lower soil body of the tower foundation threatening the 500kV fishing two-circuit 18# tower foundation is predicted by the device and the method, and the device and the method are used for carrying out remediation treatment on the premise of guaranteeing the stability of the tower foundation.
Example 2:
the basic content is the same as in example 1, except that:
the monitoring system further comprises a telemetering water gauge 14 for monitoring the water content of foundation soil, the telemetering water gauge 14 is arranged on the end face of the steel beam 2, and the telemetering water gauge 14 is in signal connection with a computer 15.
In step S2, a telemetering water level gauge 14 is installed on the end face of the steel beam 2;
in step S4, when the tower foundation is repeatedly soaked by rainwater, the moisture content of the foundation soil monitored by the telemetering fluviograph 14 will change obviously, so as to affect the stability of the tower foundation, and when the moisture content of the foundation soil monitored by the telemetering fluviograph 14 exceeds 35%, the computer 15 sends out an alarm.
Example 3:
the basic content is the same as in example 1, except that:
the first filling pile 51 and the second filling pile 52 are positioned on the same plane, and the plane is perpendicular to the plane of the steel beam 2; the side surface of the top of the first filling pile 51 is provided with a placement box 7, and a plurality of pull rings 8 are arranged in the placement box 7; the size of the first filling pile 51 and the second filling pile 52 is the same, the length of the part, above the ground surface 16, of the first filling pile 51 and the second filling pile 52 is 0.5-1 m, the diameter of the first filling pile 51 and the second filling pile 52 is 1.5-2 times of the diameter of the precast pile 1, and the length of the first filling pile 51 and the second filling pile 52 is 3-5 times of the length of the precast pile 1.
Example 4:
the basic content is the same as in example 1, except that:
the number of the steel beams 2 is two, the two steel beams 2 are symmetrically arranged, two precast piles 1 are vertically connected to the steel beams 2, and the four precast piles 1 are arranged in a rectangular mode; the steel strands 9 are connected to the two ends of the steel beam 2, the steel strands 9 at the two ends of one steel beam 2 are connected with the pull ring 8 at one side of the first cast-in-place pile 51, and the steel strands 9 at the two ends of the other steel beam 2 are connected with the pull ring 8 at the other side of the first cast-in-place pile 51.
Example 5:
the basic content is the same as in example 1, except that:
the top both sides of girder steel 2 all are provided with protection box 3, are provided with displacement sensor 12 in the protection box 3.

Claims (8)

1. The method for guaranteeing the stability of the tower foundation is characterized in that the method is applied to a device for guaranteeing the stability of the tower foundation;
the device comprises a tower foundation, a cast-in-place pile (5), a stretching mechanism and a monitoring system; the monitoring system comprises a displacement sensor (12), a pressure sensor (13) and a computer (15), wherein the computer (15) is respectively connected with the displacement sensor (12) and the pressure sensor (13) in a signal manner; the tower foundation comprises a precast pile (1) and steel beams (2), wherein the precast pile (1) is positioned below a ground surface (16), the top of the precast pile (1) is connected with the bottom of a tower (4), the bottom of the precast pile (1) is connected with the top of the steel beams (2), displacement sensors (12) are arranged on two sides of the top of the steel beams (2), and a plurality of pressure sensors (13) are uniformly arranged at the bottom of the steel beams (2); the cast-in-place pile (5) comprises a cast-in-place pile (51) and two second cast-in-place piles (52), wherein the cast-in-place pile (51) is positioned in the middle of a tower foundation, the two second cast-in-place piles (52) are respectively positioned on two sides of the tower foundation, one ends of the cast-in-place pile (51) and the second cast-in-place pile (52) are positioned below a ground surface (16), the other ends of the cast-in-place pile (51) and the second cast-in-place pile (52) are positioned above the ground surface (16), a track (6) is arranged on the end surfaces of the other ends of the cast-in-place pile (51), and pull rings (8) are arranged on the side surfaces of the other ends of the cast-in-place pile (51); the stretching mechanism comprises a steel strand (9), a track beam (10) and a winch (11), one end of the steel strand (9) is connected with the end part of the steel beam (2), the other end of the steel strand (9) is connected with a pull ring (8), the track beam (10) is matched with the track (6), and the winch (11) is arranged on the track beam (10);
the method comprises the following steps:
s1, after a foundation is excavated, constructing and maintaining a first filling pile (51) and a second filling pile (52), removing a mould after the strength of the first filling pile (51) and the second filling pile (52) reach the standard, and installing a track (6) and a pull ring (8) on the top of the first filling pile (51) and installing the track (6) on the top of the second filling pile (52);
s2, assembling the precast pile (1) and the steel beam (2), simultaneously installing displacement sensors (12) on two sides of the top of the steel beam (2), installing a pressure sensor (13) on the bottom of the steel beam (2), and then placing the assembled tower foundation at a designated position;
s3, firstly pulling out steel strands (9) from two ends of a steel beam (2) to be connected with pull rings (8) on a first filling pile (51), backfilling soil in layers, then installing a pole tower (4) on the top of a precast pile (1), finally starting a computer (15), and recording initial values of a displacement sensor (12) and a pressure sensor (13);
s4, when the soil body at the lower part of the tower foundation loosens or collapses, the tower foundation moves downwards, the numerical value of the pressure sensor (13) is fused, the numerical value of the displacement sensor (12) is correspondingly changed, and at the moment, the computer (15) gives an alarm;
s5, firstly, installing a track beam (10) on a track (6) on the top of a first filling pile (51) and a second filling pile (52), installing a winch (11) on the track beam (10), then connecting a steel strand (9) connected with a pull ring (8) to the winch (11), starting the winch (11), pulling the steel strand (9) by the winch (11) to adjust the position of the steel beam (2), simultaneously, observing the change of the value of a displacement sensor (12) in real time, and stopping pulling the steel strand (9) by the winch (11) when the value of the displacement sensor (12) returns to an initial value, wherein the winch (11) pulls the steel strand (9) to ensure that the stability of a pole tower foundation is unchanged;
s6, firstly surveying soil near the foundation of the tower by utilizing the detection device, excavating the soil needing secondary remediation, controlling the winch (11) to release the steel strand wires (9) after the soil is treated, then detaching the steel strand wires (9) from the winch (11) and connecting the steel strand wires to the pull ring (8), and then detaching the winch (11) and the track beam (10).
2. A method of ensuring stability of a pole foundation according to claim 1, wherein:
the monitoring system further comprises a telemetering water level gauge (14) for monitoring the water content of foundation soil, the telemetering water level gauge (14) is arranged on the end face of the steel beam (2), and the telemetering water level gauge (14) is in signal connection with a computer (15);
in the step S2, a telemetering water level gauge (14) is arranged on the end face of the steel beam (2);
in step S4, when the remote measuring water level gauge (14) detects that the water content of the foundation soil exceeds 35%, the computer (15) gives an alarm.
3. A method of ensuring stability of a pole foundation according to claim 1, wherein: the side at the top of the first filling pile (51) is provided with a placement box (7), and a plurality of pull rings (8) are arranged in the placement box (7).
4. A method of ensuring stability of a pole foundation according to claim 1, wherein: the first filling pile (51) and the second filling pile (52) are located on the same plane, and the plane is perpendicular to the plane where the steel beam (2) is located.
5. The method for ensuring stability of a tower foundation according to claim 4, wherein: the size of the first filling pile (51) is the same as that of the second filling pile (52), the lengths of the first filling pile (51) and the second filling pile (52) which are positioned above the ground surface (16) are 0.5-1 m, the diameters of the first filling pile (51) and the second filling pile (52) are 1.5-2 times that of the precast pile (1), and the lengths of the first filling pile (51) and the second filling pile (52) are 3-5 times that of the precast pile (1).
6. A method of ensuring stability of a pole foundation according to claim 1, wherein: the number of the steel beams (2) is two, the two steel beams (2) are symmetrically arranged, two precast piles (1) are vertically connected to the steel beams (2), and the four precast piles (1) are arranged in a rectangular mode.
7. The method for ensuring stability of a tower foundation according to claim 6, wherein: the steel strand wires (9) are connected to both ends of girder steel (2), and steel strand wires (9) at both ends of girder steel (2) are connected with pull ring (8) of one side of filling pile (51), and steel strand wires (9) at both ends of another girder steel (2) are connected with pull ring (8) of the opposite side of filling pile (51).
8. A method of ensuring stability of a pole foundation according to claim 1, wherein: the protection box (3) is arranged on two sides of the top of the steel beam (2), and the displacement sensor (12) is arranged in the protection box (3).
CN202211390081.1A 2022-11-08 2022-11-08 Device and method for guaranteeing stability of pole tower foundation Active CN116043904B (en)

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1151787A (en) * 1997-08-08 1999-02-26 Hokkaido Electric Power Co Inc:The Sensing and display apparatus for irregular displacement in base of steel tower
CN204401646U (en) * 2014-11-22 2015-06-17 孙晨 Universal 5 support ballast formula foundation for tower crane
CN209620136U (en) * 2019-01-05 2019-11-12 陕西国锋电气化工程有限公司 A kind of ruggedized construction of margin of foundation pit shallow foundation high voltage iron tower
CN110749309A (en) * 2019-10-23 2020-02-04 国网山西省电力公司经济技术研究院 System and method for detecting settlement of foundation of power line tower
CN212506375U (en) * 2020-07-01 2021-02-09 中国地质环境监测院 Anti-deformation device and deformation monitoring system for high-voltage line tower
CN215165787U (en) * 2021-06-29 2021-12-14 云南隆源线路器材有限公司 Transmission line iron tower with annular stretching and reinforcing structure
CN114215122A (en) * 2021-12-16 2022-03-22 国网湖北省电力有限公司经济技术研究院 Testing device and method for instability of transmission tower foundation under karst soil cave development condition
CN114541489A (en) * 2021-10-22 2022-05-27 湖州电力设计院有限公司 Power transmission line rod plate type foundation settlement test and repair method
CN115075308A (en) * 2022-07-01 2022-09-20 新疆鑫长宇信息科技有限公司 Deep settlement displacement monitoring system and construction method thereof

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1151787A (en) * 1997-08-08 1999-02-26 Hokkaido Electric Power Co Inc:The Sensing and display apparatus for irregular displacement in base of steel tower
CN204401646U (en) * 2014-11-22 2015-06-17 孙晨 Universal 5 support ballast formula foundation for tower crane
CN209620136U (en) * 2019-01-05 2019-11-12 陕西国锋电气化工程有限公司 A kind of ruggedized construction of margin of foundation pit shallow foundation high voltage iron tower
CN110749309A (en) * 2019-10-23 2020-02-04 国网山西省电力公司经济技术研究院 System and method for detecting settlement of foundation of power line tower
CN212506375U (en) * 2020-07-01 2021-02-09 中国地质环境监测院 Anti-deformation device and deformation monitoring system for high-voltage line tower
CN215165787U (en) * 2021-06-29 2021-12-14 云南隆源线路器材有限公司 Transmission line iron tower with annular stretching and reinforcing structure
CN114541489A (en) * 2021-10-22 2022-05-27 湖州电力设计院有限公司 Power transmission line rod plate type foundation settlement test and repair method
CN114215122A (en) * 2021-12-16 2022-03-22 国网湖北省电力有限公司经济技术研究院 Testing device and method for instability of transmission tower foundation under karst soil cave development condition
CN115075308A (en) * 2022-07-01 2022-09-20 新疆鑫长宇信息科技有限公司 Deep settlement displacement monitoring system and construction method thereof

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