CN112665789A - Underground building concrete structure waterproof quality field detection method - Google Patents
Underground building concrete structure waterproof quality field detection method Download PDFInfo
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- CN112665789A CN112665789A CN202011495439.8A CN202011495439A CN112665789A CN 112665789 A CN112665789 A CN 112665789A CN 202011495439 A CN202011495439 A CN 202011495439A CN 112665789 A CN112665789 A CN 112665789A
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- 238000001514 detection method Methods 0.000 title claims abstract description 116
- 239000004567 concrete Substances 0.000 title claims abstract description 61
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 133
- 238000013461 design Methods 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 21
- 238000010276 construction Methods 0.000 claims description 13
- 239000002689 soil Substances 0.000 claims description 11
- 238000012360 testing method Methods 0.000 claims description 10
- 238000007689 inspection Methods 0.000 claims description 9
- 230000000694 effects Effects 0.000 claims description 5
- 238000010998 test method Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 8
- 239000007787 solid Substances 0.000 abstract description 3
- 230000001502 supplementing effect Effects 0.000 abstract 1
- 238000012423 maintenance Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 239000012466 permeate Substances 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000011895 specific detection Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000003487 anti-permeability effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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Abstract
The invention discloses a field detection method for waterproof quality of a concrete structure of an underground building, which comprises the steps of selecting a part of underground engineering concrete structure as a detection structure, arranging a reservoir on the ground or the top above the detection structure, so that water in the reservoir is leaked to the concrete structure, continuously supplementing water to stabilize the detection water level of the reservoir at the design water level of the detection structure, recording the leakage condition of the detection structure after a plurality of detection times, and judging the waterproof quality of the detection structure according to the leakage condition. According to the invention, the water storage tank is arranged on the ground or the top above the concrete structure of the underground engineering, so that the water level in the water storage tank is stabilized at the designed water level elevation, the leakage condition of the concrete structure is judged, the acceptance condition is equal to the design condition, the waterproof quality of the concrete structure of the underground engineering is effectively controlled, the quality problem is found as soon as possible, the design and process of each participating party are improved, the waterproof quality of the solid engineering is improved, the direct loss and the indirect loss caused by later leakage are effectively avoided, and the negative social influence is avoided.
Description
Technical Field
The invention relates to the technical field of constructional engineering, in particular to a field detection method for the waterproof quality of an underground building concrete structure.
Background
The waterproof engineering is the key process of underground construction, after underground construction such as subway drops into operation, along with the change of ground water level, especially when south rainy season, the concrete structure pressure-bearing increases, can constantly take place the problem of percolating water, cause harmful effects to underground construction's operation and function, and the leaking stoppage that the engineering was carried out after the acceptance check also consumes a large amount of material resources and cost of labor, for avoiding this kind of condition, need carry out waterproof detection to underground construction before the acceptance check, reform transform the seepage problem to improve the economic benefits and the social of engineering.
However, the existing national standard has bias material, impression and structural deviation on the waterproof quality detection standard, lacks on-site inspection requirements on detection of functions and actual effects, does not establish a waterproof detection method for an underground structure entity project and an evaluation standard which takes the entity project quality as a main basis, and causes that the existing waterproof detection standard does not correspond to the designed anti-permeability requirements, the detection conditions do not meet the design requirements, whether the process structure meets the requirements or not, and whether the waterproof function is met or not does not correspond to a clearance measure. When the inspection and acceptance work is carried out, the existing waterproof detection cannot judge whether the solid engineering of the underground building concrete structure meets the waterproof requirement under the condition that the natural condition is difficult to form the detection environment which is the same as the design condition. The concrete embodiment is that the underground water level is lower, and the water pressure that causes the concrete structure is less than design pressure, and the detection personnel directly carry out waterproof inspection for the underground works concrete structure physical engineering who passes through the acceptance has mostly not experienced the waterproof detection of pressure under the design condition, thereby leads to underground works concrete structure to not reach waterproof requirement and realizes the engineering acceptance, causes the seepage problem of operation process.
The above disadvantages need to be improved.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a field detection method for the waterproof quality of an underground building concrete structure.
The technical scheme of the invention is as follows:
the utility model provides an underground construction concrete structure waterproof quality field test method, selects some underground construction concrete structure to detect the structure, sets up the cistern at the top ground or the top that detect the structure for the inside moisture of cistern is through the seepage effect to concrete structure, and the constant replenishment moisture makes the detection water level of cistern stable at the design water level elevation that detects the structure, through a plurality of check-out time, records the seepage condition that detects the structure, judges the waterproof quality that detects the structure according to the seepage condition.
In the method for detecting the waterproof quality of the underground building concrete structure on site, the structure for detecting the structure comprises
1. A section main structure wallboard part;
2. deformation joints;
3. open-cut underground stations of subways;
4. and the joint between the station and the section.
Further, a top plate, a bottom plate and a side wall are respectively selected as detection structures at intervals of 100 meters for the underground engineering long and longitudinal structure.
Further, if the movement joint is provided with the water receiving tank, at the testing process, the water receiving tank is the open mode to observe the seepage condition of movement joint.
Furthermore, in the subway engineering, deformation joints arranged at underground stations, section main bodies, station access and exit passages and large platforms of vehicle sections of the subway are necessary inspection parts.
According to the field detection method for the waterproof quality of the underground building concrete structure, the reservoir covers the orthographic projection range above or at the top of the detection structure, the side wall of the reservoir is subjected to waterproof treatment, and water in the reservoir leaks from the bottom of the reservoir to the underground.
According to the field detection method for the waterproof quality of the underground building concrete structure, the detection water level of the reservoir is stabilized at the highest design water level of the detection structure.
Furthermore, the cistern sets up water level inductor and intelligent control system, and the water level inductor is connected and is sent sensing signal to intelligent control system, and intelligent control system adjusts the water level of cistern according to detecting water level control water installations and pumping equipment, stabilizes the cistern water level at the detection water level.
According to the field detection method for the waterproof quality of the underground building concrete structure, the height of the reservoir is 20 cm higher than the detection water level.
Furthermore, the length of the water storage pool is 2-3 meters, and the width of the water storage pool is 1-2 meters.
According to the method for detecting the waterproof quality of the underground building concrete structure on site, the detection time is determined according to the buried depth condition and the soil layer thickness of the detection structure, and the detection time is 3-14 days in general.
According to the field detection method for the waterproof quality of the underground building concrete structure, the waterproof quality is detected in the field for 3 days before the detection of the backfill of the structure; and the waterproof quality is detected on site, and the detection time is not less than 14 days after the detection of the backfilled soil of the structure.
According to the method for the field detection of the waterproof quality of the underground building concrete structure, the waterproof quality is detected immediately after the underground engineering concrete main body structure is finished and before the backfill of the underground engineering concrete main body structure is concealed, or the waterproof quality is detected immediately after the underground engineering concrete main body structure is finished and the backfill of the underground engineering concrete main body structure is concealed.
According to the scheme, the invention has the beneficial effects that the reservoir is arranged on the ground or the top above the underground engineering concrete structure, the water level in the reservoir is stabilized at the designed water level elevation, the underground high water level environment in the rich water season is simulated, so that the leakage condition of the concrete structure is judged, the acceptance condition is equal to the design condition, the waterproof quality of the concrete structure of the underground engineering is effectively controlled, the quality problem is found as soon as possible, the design and process of each participating party is improved, the waterproof quality of the solid engineering is improved, the direct loss and the indirect loss caused by the later leakage are effectively avoided, the negative social influence is avoided, and the large amount of expensive leaking stoppage and maintenance cost after operation is saved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural diagram of the present invention.
Wherein, in the figures, the respective reference numerals:
1. a reservoir; 2. and detecting the structure.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "fixed" or "disposed" or "connected" to another element, it can be directly or indirectly located on the other element. The terms "upper", "lower", "front", "rear", "top", "bottom", "inner", "outer", and the like indicate orientations or positions based on the orientations or positions shown in the drawings, and are for convenience of description only and not to be construed as limiting the technical solution. The terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "a number" is one or more unless specifically limited otherwise.
The utility model provides an underground construction concrete structure waterproof quality on-spot test method, as shown in figure 1, select some underground construction concrete structure to detect structure 2, the top ground or the top that detect structure 2 set up cistern 1 for 1 inside moisture of cistern through the seepage effect to concrete structure, and constantly supply moisture makes the detection water level of cistern 1 stabilize at the design water level elevation that detects structure 2, through a plurality of check-out time, the record detects the seepage condition of structure 2, judge the waterproof quality that detects structure 2 according to the seepage condition.
In most cases, when underground engineering is accepted, the natural weather of continuous heavy rain is difficult to be touched, the probability that the underground water level cannot reach the designed water level is very high, and the naturally caused environmental conditions are obviously lower than the design conditions, so that the detection method and the evaluation standard can meet the design standard of the underground engineering concrete structure, namely, the acceptance condition reaches the design conditions.
The detection method is suitable for underground construction engineering, water storage detection and waterproof performance are carried out at concrete structures according to the highest water level design requirement, such as relatively complex underground stations dug in open subway, main structure wall plate positions of intervals, deformation joints, joints of stations and intervals and the like, the water storage tank 1 is arranged on the ground or the top above the concrete structures, the water level of the water storage tank 1 is stabilized at the designed water level elevation so as to simulate the hydrological environment condition in a water-rich season, and the waterproof quality of the concrete structures is detected by giving high water level pressure to the concrete structures. The specific detection method, including the detection conditions and detection criteria, is as follows.
1. The reservoir 1 is designed to be standard.
The water reservoir 1 can be temporarily built by using field materials, such as bricks, cement and other building materials. The area of the water storage tank 1 can be detected in a sampling mode, a part of concrete structure is selected as a detection structure 2, and the water storage tank 1 is enabled to cover the orthographic projection range of the ground or the top above the concrete structure. In general, the length of the reservoir 1 is about 2 m to 3 m, and the width thereof is about 1 m to 2 m, which can be determined by the area of the detection structure 2 to be actually extracted, and can be increased or decreased by a proper amount. Similarly, the shape of the detection structure can be determined according to the actual situation of the field and the distribution situation of the detection structure 2. The height of the reservoir 1 is determined by the designed maximum level of the detection structure 2, typically the height of the reservoir 1 is about 20 cm higher than the designed maximum level.
The reservoir 1 has only a side wall structure, and the bottom of the reservoir is not closed, so that water in the reservoir 1 leaks to a backfill soil layer, and the water level of the reservoir 1 is changed during detection due to the influence of other natural environments or other factors. So need stabilize at design water level elevation for guaranteeing the water level in the cistern 1, 1 inner walls of cistern need carry out the wholesale and handle, prevent cistern 1's water from the lateral wall seepage to can set up water level sensor and intelligence control system at cistern 1. The water level sensor feeds back the water level condition to the intelligent control system, and the intelligent control system starts the water inlet pump and the water suction pump according to the preset water level to adjust the water level of the reservoir 1 so as to ensure that the water level of the reservoir 1 is stabilized at the designed water level elevation.
2. And (5) detecting a water storage time point.
The water storage detection method is used for detecting the waterproof quality of the main body structure and the deformation joint and needs to be carried out after the construction of the main body structure and the deformation joint is completed. The water storage detection method requires that the detection structure 2 receives the pressure of the highest water level and the leakage condition of the detection structure 2 is observed, so that water needing to be stored in the water storage tank 1 can permeate into the ground and can leak out from a detection part, and therefore, after the structure is completed, the water storage detection method needs to finish concrete pouring on the ground above, and both time points can be realized before backfilling or after backfilling, and only the water in the water storage tank 1 can permeate into the ground.
3. Water storage detection duration.
The water storage detection method is characterized in that the water storage tank 1 is arranged on the ground at the top/above the detection structure 2, the natural condition of the water-rich season is simulated, the water storage level reaches the designed water level elevation, the bottom of the water storage tank 1 is not sealed, the water in the water storage tank 1 can permeate into the ground, and the seepage condition of the back surface of the detection structure 2 is observed so as to check the waterproof quality of the detection structure 2. Therefore, the water storage detection time is actually the duration of the water level of the water storage tank 1 stabilizing at the designed water level, and theoretically, the factors such as the water seepage speed of the soil and the distance between the water storage tank 1 and the detection structure 2 should be considered.
After a large number of tests and field observation, under normal conditions, if the upstream surface leaks, the leakage basically occurs within two days from the beginning of detection, and the water storage detection time can be set to be 7 days by considering the difference of soil environments, external walls and other structural factors. In actual detection, the water storage detection duration of 3-14 days can be considered according to the buried depth and the soil layer thickness of the detection structure under the normal condition.
However, the selection of the water storage detection time point has a certain influence on the detection duration, for example, the detection duration after the backfill soil is filled with the backfill soil is slow in seepage speed, so that the water storage duration for water storage detection after the backfill soil cannot be less than 14 days, and the water level of the water storage tank 1 needs to be stabilized at the designed water level elevation all the time. If the water storage detection is carried out before the backfilling, the water storage duration time required by the water storage detection is 3 days in consideration of certain errors and terrain differences.
In conclusion, in the water storage detection, before backfilling, the water level elevation time of the reservoir 1 is stably designed to be 3 days, and if the structure comprises an outer wall or the soil seepage speed is slow, the water level stabilization time needs 3-7 days; after backfilling, the reservoir 1 is stabilized at the design water level for not less than 14 days.
4. The selection of the detection structure 2.
The water storage detection method is characterized in that a detection environment with the water level elevation designed is artificially created by simulating the water level elevation in the rich water season, and the detection condition is equal to the design condition, so that the waterproof quality of the underground construction engineering is detected, and therefore, the detection structure 2 needs to select a concrete structure which is designed according to the designed water level elevation in the underground engineering.
The specific detection structure 2 includes:
(1) open-cut underground stations of subways;
(2) the partition main structure comprises a wallboard part, a side wall, a top plate and the like;
(3) when the deformation joint is detected, if the deformation joint is provided with a designed water receiving tank, the water receiving tank needs to be opened so as to observe the leakage condition of the deformation joint;
(4) the joint between the station and the interval;
(5) the top plate, the bottom plate and the side wall of the long and longitudinal structure are positioned at every 100 meters.
Wherein, all belong to the deformation joint of the access & exit in certain space, the cistern 1 that sets up needs the roof and the side wall of cover structure, including the deformation joint of the access & exit of subway open cut underground station.
The geotechnical engineering has the saying of 'ten joints and nine joints', and for subway engineering, the most serious parts of deformation joint leakage comprise a subway station main body, a station access passage and a vehicle section large platform, and all deformation joints existing in the places need to be subjected to water storage detection. If conditions allow, after the reservoir 1 with the highest designed water level is arranged, the detection time can be properly prolonged, and weeks or even months of observation are waited to obtain the conclusion of passing the acceptance, so that the waterproof quality of the detection structure 2 is ensured.
In actual conditions, if the concrete structure later stage of a certain section of underground engineering does not have development planting greening, the filling elevation of the concrete structure cannot rise to the deformation joint top plate, so that the top of the concrete structure is only drenched by rain during use, therefore, the concrete structure does not need to be stored for detection, the waterproof quality of the section can be detected through water drenching, each detection point is drenched for ten minutes continuously, and whether the leakage phenomenon exists or not is observed to judge the waterproof quality of the section.
In a specific embodiment, as shown in fig. 1, water storage detection is performed on each station and access deformation joint of a certain subway project. In the detection process, the covering surface of the reservoir 1 comprises a top plate and a side wall, and the main sampling points of the deformation joint are the top part, the side surface and the corner part of the top of the wall. The deformation joint water storage detection is performed at 40 positions, the deformation joint water spraying detection is performed at 10 positions, the top plate and side wall water storage detection is performed at 30 positions, and the total sampling detection points are 80 positions. In order to complete partial repairing and leaking stoppage operations simultaneously in the water storage detection period, the water storage detection time is 2-3 months.
During the inspection process, the inspector needs to record the initial condition of the inspection structure 2, the water level of the reservoir 1 and the leakage condition of the inspection structure 2. Wherein, if cistern 1 is provided with intelligent control system, can read 1 water level height of cistern during the detection in the intelligent control system.
The results are shown in the following table:
the seven detection projects and eight detection reports are comprehensively summarized, and 80 parts of detection are sampled, wherein 70 parts of water storage detection, 10 parts of water spraying detection and 11 parts of leakage points are provided, the leakage rate is 14%, wherein 40 parts of deformation joint water storage detection, 5 parts of leakage points and 12.5% of leakage rate, 30 parts of side wall and top plate water storage detection and 6 leakage points are provided, and the leakage rate is 20%.
Because the water storage detection time is long, the time can be prolonged to several weeks or even several months according to actual conditions, and therefore, the deformation joint can be timely treated and repaired when leakage occurs. In another embodiment, the subway vehicle section maintenance warehouse is subjected to water storage detection, vehicles and equipment are particularly sensitive to water leakage due to the fact that a vehicle maintenance workshop is arranged below deformation joints of the maintenance warehouse, water storage detection can be maintained for more than two months, meanwhile, each deformation joint of the maintenance warehouse is processed until no leakage exists in the water storage detection of each deformation joint, and leakage stoppage meets the requirement.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The utility model provides an underground construction concrete structure waterproof quality field test method which characterized in that selects some underground construction concrete structure to detect the structure, sets up the cistern at the top ground or top that detect the structure for the inside moisture of cistern is through the seepage effect to concrete structure, and constantly supply moisture makes the detection water level of cistern stabilize at the design water level elevation that detects the structure, through a plurality of check-out time, records the seepage condition that detects the structure, judges the waterproof quality that detects the structure according to the seepage condition.
2. The method of claim 1, wherein the step of testing the structure of the structure comprises testing the structure of the structure with a tester
(1) A section main structure wallboard part;
(2) deformation joints;
(3) open-cut underground stations of subways;
(4) and the joint between the station and the section.
3. The method for the field detection of the waterproof quality of the underground building concrete structure as claimed in claim 2, wherein the top plate, the bottom plate and the side wall are respectively selected as the detection structure every 100 meters of the underground engineering long and vertical structure.
4. The method for the field test of the waterproof quality of the underground building concrete structure as claimed in claim 2, wherein if the deformation joint is provided with a water receiving tank, the water receiving tank is in an open state during the test.
5. The method for on-site detection of waterproof quality of underground building concrete structure according to claim 2, characterized in that in the subway engineering, all deformation joints arranged at the main and section main structures of the subway underground station, the station access and exit passage and the large platform of the vehicle section are necessary detection positions.
6. The method for the field detection of the waterproof quality of the underground building concrete structure according to claim 1, wherein the reservoir covers the orthographic projection range of the upper part or the top part of the detection structure, the side wall of the reservoir is subjected to waterproof treatment, and water in the reservoir leaks from the bottom of the reservoir to the underground.
7. The method of claim 1, wherein the water level of the reservoir is stabilized at a design maximum level of the test structure.
8. The method for the field inspection of the waterproof quality of an underground structure of concrete according to claim 1, wherein the inspection time is 3 to 14 days.
9. The method of claim 1, wherein the field testing of the waterproof quality of the underground structure is carried out for 3 days before the backfilling of the structure; and the waterproof quality is detected on site, and the detection time is not less than 14 days after the detection of the backfilled soil of the structure.
10. The method of claim 1, wherein the waterproof quality on-site test is performed immediately after the underground concrete main structure is completed and before the underground concrete main structure is concealed, or the waterproof quality on-site test is performed immediately after the underground concrete main structure is completed and the underground concrete main structure is concealed.
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