CN114250988B - Method for detecting and repairing leakage water at bottom joint of precast concrete shear wall - Google Patents
Method for detecting and repairing leakage water at bottom joint of precast concrete shear wall Download PDFInfo
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- CN114250988B CN114250988B CN202210080769.3A CN202210080769A CN114250988B CN 114250988 B CN114250988 B CN 114250988B CN 202210080769 A CN202210080769 A CN 202210080769A CN 114250988 B CN114250988 B CN 114250988B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 54
- 239000011178 precast concrete Substances 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000005516 engineering process Methods 0.000 claims abstract description 36
- 238000001514 detection method Methods 0.000 claims abstract description 27
- 230000005284 excitation Effects 0.000 claims abstract description 20
- 238000001931 thermography Methods 0.000 claims abstract description 17
- 239000000084 colloidal system Substances 0.000 claims abstract description 13
- 239000003292 glue Substances 0.000 claims abstract description 9
- 238000004321 preservation Methods 0.000 claims abstract description 4
- 238000005553 drilling Methods 0.000 claims description 11
- 238000003384 imaging method Methods 0.000 claims description 9
- 230000000694 effects Effects 0.000 claims description 6
- 238000010191 image analysis Methods 0.000 claims description 6
- 238000009413 insulation Methods 0.000 claims description 5
- 239000011521 glass Substances 0.000 claims description 4
- 238000009527 percussion Methods 0.000 claims description 4
- 238000004078 waterproofing Methods 0.000 claims description 4
- 238000004026 adhesive bonding Methods 0.000 claims description 3
- 239000000523 sample Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 2
- 239000004567 concrete Substances 0.000 description 5
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0203—Arrangements for filling cracks or cavities in building constructions
- E04G23/0211—Arrangements for filling cracks or cavities in building constructions using injection
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/002—Investigating fluid-tightness of structures by using thermal means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Examining Or Testing Airtightness (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention provides an integrated method for detecting and repairing water leakage at a bottom joint of a precast concrete shear wall, which comprises the following steps of: s1, determining the water leakage range of the inner side surface of a joint at the bottom of a wall body based on an infrared thermal imaging technology under thermal excitation; s2, determining the water leakage condition in the thickness range of the bottom joint of the wall based on the centimeter wave technology; s3, positioning a leakage water path based on an endoscope technology; s4, performing directional and accurate plugging on the water leakage part. If the detection object is a sandwich heat-preservation precast concrete shear wall, the following steps are continuously carried out after the steps S1-S4 are carried out: s5, checking the situation that the glue and the PE rod at the joint of the outer bottom of the wall body with the leakage point are damaged; s6, repairing the damaged colloid and the PE rod. The invention can position the leakage water path by detection, and on the basis, the accurate leakage stoppage can be realized by utilizing the directional repair of the leakage water path detection hole.
Description
Technical Field
The invention relates to the field of assembled concrete buildings, in particular to an integrated method for detecting and repairing water leakage at a bottom joint of a precast concrete shear wall, which is applied to detection and repair of a common precast concrete shear wall or a sandwich heat-insulation precast concrete shear wall.
Background
In recent years, assembled concrete buildings are widely popularized and applied in China, wherein a precast concrete shear wall structure is a main structure type for popularization. Taking an outer wall as an example, a common precast concrete shear wall mainly comprises two types: one is a common precast concrete shear wall with the thickness of 200mm, and the bottom joint is connected and waterproof through grouting of a communicating cavity; a300 mm thick sandwich heat preservation precast concrete shear force wall, interior leaf wall 200mm is thick, and the bottom seam is through the intercommunication chamber grout realization connection and waterproof, and middle heat preservation is 50mm thick, and the bottom is placed the rubber strip and is realized inside and outside leaf wall and separate, and outer leaf wall is 50mm thick, and the bottom outside embedding PE stick and beat the glue and realize the material waterproof, and the bottom still sets up the tongue-and-groove simultaneously and realizes that the structure is waterproof.
For a common precast concrete shear wall, when a communicating cavity is grouted, a single-point grouting method is adopted, but in actual operation, the condition that grouting holes are replaced at will often exists, so that air in the communicating cavity at the bottom cannot be effectively discharged, a grouting non-compact area is generated in a bottom joint, and a water leakage hidden danger is formed. For the sandwich heat-insulating precast concrete shear wall, if the glue and PE stick at the bottom of the outer leaf wall are broken, outside rainwater can enter the outer leaf wall bottom structure drainage area, once the rubber strip under the heat-insulating layer is broken and the joint grouting at the bottom of the inner leaf wall is not compact, water in the structure drainage area can further leak inwards until reaching the indoor space. Both of the above-described situations occur in practical engineering, and thus, how to effectively locate the leakage path and perform directional accurate plugging is highly desired to be solved in the industry.
Patent investigation shows that: the integrated leakage detecting and plugging device and the technological process thereof (publication No. CN 110952644A) aim at the ground of a basement, and the obvious leakage part of the ground directly observed by naked eyes is detected, and the effective positioning of a leakage path is not carried out, so that the directional accurate plugging is difficult to realize. According to the device and method for detecting and repairing the leakage water at the joints of the underground continuous wall groove sections (publication number: CN 110258516A), positioning pieces are pre-embedded in each continuous wall groove section, a leakage detection chamber is arranged at the top of each positioning piece, the leakage detection chamber is internally subjected to leakage detection, concrete is directly introduced to perform leakage stopping after leakage detection, and the leakage detection is performed in a manner of pre-embedded elements, so that the cost is high and the popularization difficulty is high.
The above patent is not directed at the condition of the bottom joint leakage water of the precast concrete shear wall, and the method cannot be popularized to the detection and repair of the bottom joint leakage water of the precast concrete shear wall due to the different structure of the leakage water part.
Disclosure of Invention
In order to solve the problems mentioned in the background art, the invention provides an integrated method for detecting and repairing the bottom joint water leakage of a precast concrete shear wall, which covers the solution of the bottom joint water leakage of a common precast concrete shear wall with the thickness of 200mm and a sandwich heat-insulating precast concrete shear wall with the thickness of 300mm, and the concrete scheme is as follows:
for a common precast concrete shear wall with the thickness of 200mm, the bottom joint leakage water detection and repair integrated method specifically comprises the following steps:
s1, determining the water leakage range of the inner side surface of a joint at the bottom of a wall body based on an infrared thermal imaging technology under thermal excitation;
s2, determining the water leakage condition in the thickness range of the bottom joint of the wall based on the centimeter wave technology;
s3, positioning a leakage water path based on an endoscope technology;
s4, performing directional and accurate plugging on the water leakage part;
for a 300mm thick sandwich heat-insulating precast concrete shear wall, the bottom joint leakage water detection and repair integrated method comprises the steps S1-S4, and further comprises the following steps: after proceeding with steps S1-S4, the following steps are continued:
s5, checking the situation that the glue and the PE rod at the joint of the outer bottom of the wall body with the leakage point are damaged;
s6, repairing the damaged colloid and the PE rod.
Further, the step S1 of determining the water leakage range of the inner side surface of the bottom joint of the wall based on the infrared thermal imaging technology under thermal excitation specifically includes the following steps:
s11, thermally exciting suspicious parts of water leakage on the inner side surface of a joint at the bottom of the wall body in a heating mode, wherein the thermal excitation range covers all suspicious parts, and the temperature difference between the thermal excitation parts and other parts meets the technical requirements of infrared thermal imaging;
s12, carrying out infrared thermal imaging on the thermal excitation parts, wherein the imaging range covers all the thermal excitation parts, and the imaging effect meets the basic requirement of image analysis and identification;
s13, analyzing and identifying the image obtained by the thermal imaging technology, and determining the water leakage range of the inner side surface of the bottom joint of the wall body.
Further, the step S2 determines the water leakage condition within the thickness range of the bottom joint of the wall based on the centimetre wave technology, and specifically includes the following steps:
s21, carrying out region division and numbering on the water leakage range of the inner side surface of the bottom joint of the wall body, which is detected based on the infrared thermal imaging technology under thermal excitation, along the length direction of the bottom joint, wherein the size of each divided region meets the detection requirement of the centimeter wave technology;
s22, transilluminating the wall body from the inner side to the outer side of the wall body in each detection area by using a centimeter wave technology to obtain an image in the thickness direction of the bottom joint, wherein the imaging effect meets the basic requirement of image analysis and identification;
s23, analyzing and identifying the image obtained by the centimeter wave technology, determining whether seepage phenomenon exists in the thickness direction of the bottom joint of each detection area from outside to inside, and recording.
Further, the step S3 locates the water seepage path based on the endoscope technology, and specifically includes the following steps:
s31, marking and numbering the areas with seepage in the thickness direction of the bottom joint, which are detected based on the centimeter wave technology, according to the preset step length along the length direction of the bottom joint;
s32, drilling holes at each scribing point by using a percussion drill, wherein the outer diameter of the percussion drill bit is not more than 12mm, and the drilling length is not more than half of the thickness of the wall body;
s33, observing the drilling position by using an endoscope, and photographing and recording if the uncompacted area exists in the drilling position, wherein the outer diameter of the probe of the endoscope is not more than 5mm.
Further, the step S4 adopts directional and accurate plugging, and specifically comprises the following steps:
s41, plugging is carried out one by one through plugging equipment according to the number sequence of the non-compact area of the bottom joint of the wall body, which is observed based on an endoscope technology, wherein the plugging equipment is a grouting device with adjustable grouting pressure, speed and flow, and the outer diameter of a grouting pipe of the plugging equipment is smaller than or equal to 2mm of the inner diameter of a drilling hole;
s42, after grouting and plugging of the non-compact area are completed, grouting and filling are carried out on the drilling holes of the compact area by using the plugging equipment.
Further, the step S5 is to check that the glue and the PE rod at the bottom joint of the outside of the wall with the leakage point are damaged, and specifically includes the following steps:
s51, checking the bottom joint of the outer side of the wall body with the leakage point in detail from one end to the other end by means of a magnifying glass;
s52, marking and recording the places where the colloid and the PE rod are damaged.
Further, the step S6 of repairing the damaged colloid and the PE rod specifically includes the following steps:
s61, removing colloid and PE rods at the damaged part;
s62, repositioning a new PE rod, and re-gluing, wherein the repaired part and the unbroken part have a certain overlapping range, and the overlapping range is not smaller than 40mm.
The integrated method for detecting and repairing the water leakage of the bottom joint of the precast concrete shear wall provided by the invention covers the monitoring and repairing of the common precast concrete shear wall with the thickness of 200mm and the sandwich insulation precast concrete shear wall with the thickness of 300mm, the water leakage path can be positioned through detection, on the basis, the accurate plugging can be realized by utilizing the directional repairing of the water leakage path detection hole, thereby realizing the integrated detection and repairing, and having important significance for improving the quality of the assembled concrete construction.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of the integrated method for detecting and repairing the water leakage of the bottom joint of the precast concrete shear wall.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the invention may be practiced without one or more of these details. In other instances, well-known features have not been described in detail in order to avoid obscuring the invention.
In order to provide a thorough understanding of the present invention, detailed steps and detailed structures will be presented in the following description in order to explain the technical solution of the present invention. Preferred embodiments of the present invention are described in detail below, however, the present invention may have other embodiments in addition to these detailed descriptions.
The invention will be described in further detail with reference to fig. 1 and examples.
Embodiment one:
in the embodiment, the water leakage detection and repair are carried out on the common precast concrete shear wall with the thickness of 200mm, and the steps are as follows.
Step S1, determining the water leakage range of the inner side surface of the bottom joint of the wall based on the infrared thermal imaging technology under thermal excitation, and specifically comprising the following steps:
1) And thermally exciting suspicious parts of water leakage on the inner side surface of the bottom joint of the wall body through an electric heating blower, wherein the thermal excitation range covers all suspicious parts, and the temperature difference between the thermal excitation parts and other parts meets the technical requirements of infrared thermal imaging.
2) And infrared thermal imaging is implemented on the thermal excitation parts, the imaging range covers all the thermal excitation parts, and the imaging effect meets the basic requirement of image analysis and identification.
3) And analyzing and identifying the image obtained by the thermal imaging technology, and determining that the water leakage range of the inner side surface of the bottom joint of the wall body is 1.3 m-1.8 m away from the south end of the wall body.
Step S2, determining the water leakage condition in the thickness range of the bottom joint of the wall based on the centimeter wave technology, and specifically comprising the following steps:
1) And (3) dividing the water leakage range of the inner side surface of the bottom joint of the wall body, which is detected based on the infrared thermal imaging technology under thermal excitation, along the length direction of the bottom joint, wherein 10 areas are divided according to 0.05m step length from 1.3m to 1.8m from the south end of the wall body, and the numbers are 1-10 from the south to the north.
2) In each detection area, the wall body is transilluminated from the inner side to the outer side of the wall body through the centimeter wave technology, the image in the thickness direction of the bottom joint is obtained, and the imaging effect meets the basic requirement of image analysis and identification.
3) And analyzing and identifying images obtained by the centimeter wave technology, and determining that the areas with the numbers of 5, 6 and 7 have seepage phenomena from outside to inside.
Step S3, positioning a water seepage path based on an endoscope technology, and specifically comprising the following steps:
1) For the areas 5, 6, 7 with seepage in the thickness direction of the bottom joint detected by the centimeter wave technology, the areas are continuous areas, the areas are integrally and uniformly marked, the marked points are marked by 15mm steps along the length direction of the bottom joint, and the areas a0, a1 and … a10 are marked from the south to the north.
2) At each scribe point, a drill is drilled with a percussive drill bit having an outer diameter of 10mm and a drill length no greater than half the thickness of the inner She Qiangti.
3) The outer diameter of the endoscope probe was 4mm when observed at the drill hole, and it was found that there were non-dense areas at the positions numbered a4, a5, a6, a 7.
S4, the intelligent plugging technology-based directional accurate plugging specifically comprises the following steps:
1) According to the number sequence a4, a5, a6 and a7 of the non-compact area of the bottom joint of the wall body, which are observed based on the endoscope technology, the leakage is blocked one by one through intelligent leakage blocking equipment, the outer diameter of a grouting pipe of the intelligent leakage blocking equipment is 8mm, and the intelligent leakage blocking equipment has the functions of pressure adjustment, speed adjustment and flow adjustment.
2) And after grouting and plugging of the non-compact area are completed, drilling holes of the compact area are filled by grouting.
Embodiment two:
in the embodiment, water leakage detection and repair are carried out on the 300mm thick sandwich heat-insulating precast concrete shear wall, the inner leaf wall is 200mm thick, connection and waterproofing are realized through grouting of a communicating cavity at the bottom joint, the middle heat-insulating layer is 50mm thick, the inner leaf wall and the outer leaf wall are separated by placing rubber strips at the bottom, the outer leaf wall is 50mm thick, PE rods are embedded in the outer side of the bottom, material waterproofing is realized by gluing, and a tongue-and-groove is also arranged at the bottom to realize structural waterproofing. The wall belongs to an outer wall, is arranged in the north-south direction, has the length of 4.5m and the height of 3.0m. After raining in time, the inner side surface of the joint at the bottom of the wall body is found to have the water leakage phenomenon, and the water leakage position is detected and repaired. Referring to and referring to FIG. 1, the monitoring and repairing steps of the present invention are as follows.
All steps (i.e., steps S1-S4) in the first embodiment are performed completely, and detailed steps are not repeated in this embodiment. The following steps are then continued:
s5, checking the situation that glue and PE rods at the joint of the outer bottom of the wall body with the leakage point are damaged, and specifically comprising the following steps:
1) The outside bottom joint of the wall body with the leakage point is checked in detail from the south end to the north end by means of a magnifying glass.
2) Recording the places where the colloid and the PE rod are damaged, and displaying that only one place where the colloid and the PE rod are damaged by the magnifying glass examination result, wherein the range is 1.52 m-1.64 m away from the south end of the wall body.
S6, repairing the damaged colloid and the PE rod, which specifically comprises the following steps:
1) And removing colloid and PE rods at the damaged part.
2) The new PE rod was replaced and the glue was applied again, with the repair overlapping the unbroken one by 50mm.
The preferred embodiments of the present invention have been described above. It is to be understood that the invention is not limited to the specific embodiments described above, wherein devices and structures not described in detail are to be understood as being implemented in a manner common in the art; any person skilled in the art can make many possible variations and modifications to the technical solution of the present invention or modifications to equivalent embodiments without departing from the scope of the technical solution of the present invention, using the methods and technical contents disclosed above, without affecting the essential content of the present invention. Therefore, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.
Claims (3)
1. The integrated method for detecting and repairing the water leakage of the bottom joint of the precast concrete shear wall is applied to the detection and repair of a common precast concrete shear wall or a sandwich heat-insulation precast concrete shear wall, the sandwich heat-insulation precast concrete shear wall consists of an inner leaf wall, an outer leaf wall and a middle heat-insulation layer, PE rods are embedded at the outer side of the bottom of the outer leaf wall and glued for waterproofing,
if the detection object is a common precast concrete shear wall, the method comprises the following steps:
s1, determining the water leakage range of the inner side surface of a joint at the bottom of a wall body based on an infrared thermal imaging technology under thermal excitation, wherein the method specifically comprises the following steps: s11, thermally exciting suspicious parts of water leakage on the inner side surface of a joint at the bottom of the wall body in a heating mode, wherein the thermal excitation range covers all suspicious parts, and the temperature difference between the thermal excitation parts and other parts meets the technical requirements of infrared thermal imaging; s12, carrying out infrared thermal imaging on the thermal excitation parts, wherein the imaging range covers all the thermal excitation parts, and the imaging effect meets the basic requirements of image analysis and identification; s13, analyzing and identifying images obtained through a thermal imaging technology, and determining the water leakage range of the inner side surface of the bottom joint of the wall body;
s2, determining the water leakage condition in the thickness range of the bottom joint of the wall based on the centimeter wave technology, and specifically comprising the following steps: s21, carrying out region division and numbering on the water leakage range of the inner side surface of the bottom joint of the wall body, which is detected based on the infrared thermal imaging technology under thermal excitation, along the length direction of the bottom joint, wherein the size of each divided region meets the requirements of the centimeter wave technology detection; s22, transilluminating the wall body from the inner side to the outer side of the wall body in each detection area by using a centimeter wave technology, and acquiring an image in the thickness direction of the bottom joint, wherein the imaging effect meets the basic requirement of image analysis and identification; s23, analyzing and identifying images obtained through a centimeter wave technology, determining whether seepage phenomenon exists in the thickness direction of the bottom joint of each detection area from outside to inside, and recording;
s3, positioning a leakage water path based on an endoscope technology, wherein the method specifically comprises the following steps: s31, marking and numbering the areas with seepage in the thickness direction of the bottom joint, which are detected based on the centimeter wave technology, according to the preset step length along the length direction of the bottom joint; s32, drilling holes at each scribing point by using a percussion drill, wherein the outer diameter of the percussion drill bit is not more than 12mm, and the drilling length is not more than half of the thickness of the wall body; s33, observing the drill hole by using an endoscope, and photographing and recording if an uncompacted area exists in the drill hole, wherein the outer diameter of the probe of the endoscope is not more than 5mm;
s4, carrying out directional and accurate plugging on the water leakage part, wherein the specific steps comprise: s41, plugging is carried out one by one through plugging equipment according to the number sequence of the non-compact area of the bottom joint of the wall body, which is observed based on an endoscope technology, wherein the plugging equipment is a grouting device with adjustable grouting pressure, speed and flow, and the outer diameter of a grouting pipe of the plugging equipment is smaller than or equal to 2mm of the inner diameter of a drilling hole; s42, after grouting and plugging of the non-compact area are completed, grouting and filling are carried out on the drilling holes of the compact area by using the plugging equipment;
if the detection object is a sandwich heat-preservation precast concrete shear wall, the following steps are continuously carried out after the steps S1-S4 are carried out:
s5, checking the situation that the glue and the PE rod at the joint of the outer bottom of the wall body with the leakage point are damaged;
s6, repairing the damaged colloid and the PE rod.
2. The integrated method for detecting and repairing the bottom joint leakage water of the precast concrete shear wall according to claim 1, wherein the step S5 is to check the condition of the glue and the PE rod at the bottom joint outside the wall with the leakage point being damaged, and specifically comprises the following steps:
s51, checking the bottom joint of the outer side of the wall body with the leakage point in detail from one end to the other end by means of a magnifying glass;
s52, marking and recording the places where the colloid and the PE rod are damaged.
3. The integrated method for detecting and repairing the bottom joint leakage water of the precast concrete shear wall according to claim 2, wherein the step S6 is characterized by repairing damaged colloid and PE rods, and specifically comprises the following steps:
s61, removing colloid and PE rods at the damaged part;
s62, repositioning a new PE rod, and re-gluing, wherein the repaired part and the unbroken part have a certain overlapping range, and the overlapping range is not smaller than 40mm.
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| CN115979540B (en) * | 2023-03-22 | 2023-05-23 | 江苏上田民防设备有限公司 | Civil air defense door gas tightness testing arrangement |
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| JP2015200129A (en) * | 2014-04-09 | 2015-11-12 | 新日鐵住金株式会社 | Water leakage repair device and method for water leakage repair |
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