CN-121976575-A - Basic top surface frost heaving crack treatment device and basic top surface detection and repair method

CN121976575ACN 121976575 ACN121976575 ACN 121976575ACN-121976575-A

Abstract

The invention discloses a basic top surface frost heaving crack treatment device and a basic top surface detection and repair method, wherein the inhibition structure comprises a plurality of layers of annular units distributed longitudinally along a concrete main body, each layer of annular units is provided with a plurality of annular pipes distributed in a concentric circular array, all annular pipes positioned in the same layer of annular units are mutually communicated through a first communicating pipe, and every two adjacent layers of annular units are mutually communicated through a second communicating pipe. The detection and repair method comprises the steps of after the inhibition structure is laid and molded, pouring concrete is started to enable the inhibition structure to be wrapped by the concrete, a concrete main body is obtained, through holes penetrating into the inhibition structure are formed in the surface of the concrete main body, pressure data in the inhibition structure are obtained, after cracks are determined to exist in the inhibition structure, hydrophobic materials are poured into the inhibition structure, and the cracks in the inhibition structure are repaired through the hydrophobic materials. The invention realizes crack growth inhibition and crack rapid repair of the top surface of the power transmission tower foundation in a high-cold environment.

Inventors

ZENG GENSHENG
YUAN WEICAN
LI QIAN
LIU LILIN
XU CHENG
SUI LIANG
LENG XIANGBIAO
HU RONG
DONG YINGRUI

Assignees

南方电网能源发展研究院有限责任公司

Dates

Publication Date: 20260505
Application Date: 20260210

Claims (10)

1. The frost heaving crack treatment device for the foundation top surface is characterized by comprising a concrete main body and a suppression structure, wherein the suppression structure is arranged in the concrete main body and comprises a plurality of layers of annular units longitudinally distributed along the concrete main body, each layer of annular units is provided with a plurality of annular pipes distributed in a concentric circular array, all annular pipes in the annular units on the same layer are mutually communicated through a first communicating pipe, and every two adjacent layers of annular units are mutually communicated through a second communicating pipe.
2. The base roof frost heaving crack treatment apparatus of claim 1, wherein the suppression structure is a mortar material and is prepared by a rapid freezing technique.
3. The base roof frost heaving crack treatment apparatus of claim 1, further comprising a grouting port in communication with the annulus to inject crack detection material and/or crack repair material into the annulus based on the grouting port.
4. The base top frost heaving crack treatment apparatus of claim 3, further comprising a grouting assembly coupled to the grouting port, the grouting assembly configured to inject crack repair material into the annulus based on the grouting port upon detection of crack presence.
5. The basic top surface frost heaving crack treatment apparatus of claim 4, further comprising a pressure detection assembly connected to the grouting port, the pressure detection assembly configured to inject a pressure detection material into the annular tube, and determine a crack detection result based on pressure information fed back by the pressure detection material.
6. The basic top surface frost heaving crack treatment device according to claim 1, wherein the width ranges of the first communicating pipe and the second communicating pipe are 10-15 mm, the width range of the annular pipe is 20-25 mm, the distance between every two adjacent layers of annular units is the same, and the distance is set to be 30mm.
7. The basic top surface frost heaving crack treatment device according to claim 1 to 6, wherein the distance between every two adjacent annular pipes in the same layer of annular units is the same, the distance is set to be more than or equal to 20mm, and the projections of all annular pipes in every two adjacent layers of annular units in the vertical direction are distributed in a staggered mode.
8. The method for detecting and repairing the top surface of the foundation is characterized by comprising the following steps of: Acquiring pressure data inside the inhibition structure; And if the change information of the pressure data meets the crack judging condition, judging that the crack exists, and pouring a hydrophobic material into the inhibition structure so as to repair the crack in the inhibition structure through the hydrophobic material.
9. The method for inspecting and repairing a top surface of a foundation according to claim 8, comprising the specific steps of: Firstly, after the inhibition structure is laid and molded, pouring concrete is started, so that the inhibition structure is wrapped by the concrete, and a concrete main body is prepared; step two, when the crack development condition of the concrete main body needs to be detected, a through hole penetrating into the inhibition structure is formed in the surface of the concrete main body; step three, collecting pressure data in the inhibition structure through the through hole, judging that micro cracks exist in the concrete main body if the change information of the pressure data meets the crack judging condition, expanding and penetrating the inhibition structure at the same time, executing step four, judging that the micro cracks do not exist in the concrete main body if the change information of the pressure data does not meet the crack judging condition, and jumping to step five; pouring a hydrophobic material into the concrete body through the through hole until the hydrophobic material is filled into the through hole; And fifthly, sealing the through holes.
10. The method for repairing and detecting the top surface of the foundation according to claim 9, wherein in the first step, the distance between the top surface of the suppressing structure and the top surface of the concrete body is controlled to be 10-20 mm, and the distance between every two adjacent annular pipes in the same layer of the annular units is required to be larger than the maximum aggregate particle size of the concrete body; in the third step, a process flow for judging whether micro cracks exist in the concrete main body is specifically characterized in that an electric water injection pressure pump is utilized to connect a water source, then water is injected into the inhibition structure through a through hole, the pressure value change displayed by a pressure sensor arranged in the electric water injection pressure pump is observed, and the condition that the pressure value change meets the following condition is judged, and the corresponding process steps are executed, wherein the specific conditions are as follows: (1) If the pressure value is reduced in the water injection process or after the water is filled to the through hole, the displayed pressure value is larger than a preset pressure threshold value, determining that micro cracks exist in the concrete main body, and executing the fourth step, wherein the micro cracks are expanded and penetrate through the inhibition structure; (2) If the pressure value is kept constant and equal to the preset pressure threshold value all the time in the process from the beginning of water injection to the position of the through hole, judging that no microcrack exists in the concrete main body, and jumping to the step five; Before the corresponding treatment steps are executed, a vacuum pump is connected into the through hole, and vacuum pumping treatment is carried out on the inside of the concrete main body until water in the concrete main body is completely discharged.

Description

Basic top surface frost heaving crack treatment device and basic top surface detection and repair method Technical Field The invention relates to the technical field of concrete performance evaluation, in particular to a basic top surface frost heaving crack treatment device and a basic top surface detection and repair method. Background The top surface of the power transmission tower foundation is a bearing area used as a steel frame load, the integrity of a concrete structure is a key for guaranteeing the safety of the whole structure, and because the top surface of the power transmission tower foundation is provided with a structural requirement for being connected with a tower leg, the top surface of the power transmission tower foundation cannot be provided with distributed anti-cracking steel bars during design, and therefore shrinkage deformation generated in the concrete hardening process cannot be restrained, so that microcracks appear. Most of the power transmission towers are in field severe environments, and the freeze thawing environments of the northern severe cold areas and the plateau areas can enable moisture permeated into the microcracks to expand to generate expansion stress, so that the microcracks are developed and expanded, and the width and depth of the microcracks are increased. The existing repair mode of the top surface of the power transmission tower foundation is to seal surface cracks by using a coating, and to repair internal cracks by grouting by adopting materials such as epoxy resin, water glass, cement paste and the like, and the repair mode has the following problems: the repairing mode is only stopped at the surface of the crack or the shallow layer is closed, and the micro-crack still exists due to mismatching of the thermal expansion coefficient of the material and the concrete or the uncompacted filling, so that the moisture can still infiltrate and cause frost heaving, and the crack is continuously developed; The repairing method adopts an external grouting method, has the problems of pressure attenuation, difficult exhaustion of gas in the cracks and the like, and is easy to cause that slurry cannot penetrate into fine branches of the cracks, and the gap remains in the repaired cracks. Meanwhile, the surface layer concrete needs to be chiseled in construction, the working procedure is complex, the structure is formed into secondary disturbance, the interface between the repairing layer and the original concrete is not firmly combined, and the durability is not enough. The prior art cannot effectively avoid the continuous development of frost heaving cracks, so that the concrete foundation in the alpine or plateau environment frequently requires unavoidable overhaul or reconstruction. Disclosure of Invention The invention aims to provide a basic top surface frost heaving crack treatment device and a basic top surface detection and repair method, and aims to solve the problems that when a concrete shrinkage microcrack is generated on the basic top surface of a power transmission tower, an anti-crack steel bar cannot be configured, the common repair method is not thorough in repair, complex in construction, insufficient in durability and the like. In order to achieve the above purpose, the present invention adopts the following technical scheme: the invention provides a basic top surface frost heaving crack treatment device, which comprises a concrete main body and a suppression structure, wherein the suppression structure is arranged in the concrete main body, the suppression structure comprises a plurality of layers of annular units longitudinally distributed along the concrete main body, each layer of annular units is provided with a plurality of annular pipes distributed in a concentric circular array, all annular pipes positioned in the same layer of annular units are mutually communicated through a first communicating pipe, and every two adjacent layers of annular units are mutually communicated through a second communicating pipe. Further, the inhibition structure is made of mortar materials and is prepared by a quick freezing technology. Further, a grouting port communicated with the annular tube is further included, so that crack detection materials and/or crack repair materials are/is injected into the annular tube based on the grouting port. Further, the device comprises a grouting assembly, wherein the grouting assembly is connected with the grouting opening and is used for injecting crack repairing materials into the annular tube based on the grouting opening when the existence of cracks is detected. Further, the grouting device further comprises a pressure detection assembly, wherein the pressure detection assembly is connected with the grouting port and is used for injecting pressure detection materials into the annular tube so as to determine a crack detection result according to pressure information fed back by the pressure detection materials. Further