CN108489680B - Method and system for detecting leakage of foundation surface of basement with room soil - Google Patents
Method and system for detecting leakage of foundation surface of basement with room soil Download PDFInfo
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- CN108489680B CN108489680B CN201810388314.1A CN201810388314A CN108489680B CN 108489680 B CN108489680 B CN 108489680B CN 201810388314 A CN201810388314 A CN 201810388314A CN 108489680 B CN108489680 B CN 108489680B
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- 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
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
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- 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
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
Abstract
The invention relates to the field of civil engineering, in particular to a method and a system for detecting leakage of a foundation surface of a basement with room subsoil. The method comprises the steps of taking a suspected seepage area as a detection area on the basement foundation surface, excavating the detection area, and observing the seepage flow direction. In the detection area after excavation, an arrangement pitch is set. And (5) counting the water seepage parameters corresponding to the arrangement intervals. And according to the water seepage parameters, obtaining a functional relation between the water seepage attenuation and the arrangement distance. And calculating the position relation between the water seepage source and the detection area according to the functional relation. The method can solve the problems of complex treatment and low efficiency when the basement foundation raft leaks water in the prior art. The method is simple to operate, large-area excavation is not needed, and labor and cost are saved.
Description
Technical Field
The invention relates to the field of civil engineering, in particular to a method and a system for detecting leakage of a foundation surface of a basement with room subsoil.
Background
The basement foundation generally adopts raft type foundation.
Raft type foundation, namely full foundation. The independent foundations or strip foundations under the columns are all connected by the connecting beams, and then the bottom plate is integrally cast. The raft foundation is divided into a flat plate type raft foundation and a beam plate type raft foundation, and the flat plate type raft foundation supports a locally thickened raft type; the beam-slab raft foundation supports two forms of upper flat and lower flat of the rib beam. Generally, raft type foundations are used when the bearing capacity of the foundation is not uniform or the foundation is soft. Moreover, the raft foundation is shallow in buried depth, and even can be used as a non-buried foundation.
The basement foundation raft is because the piecemeal pouring, and the seepage easily appears in concrete joint position, and the seepage takes place again after the room heart soil backfill of basic top surface, surface course all are under construction, because the infiltration spreads everywhere in the soil, is very difficult to judge the position of water leakage point.
In the prior art, when the raft of the basement foundation leaks water, the method generally adopted is to excavate the part with open water in a large area to find out the water leakage point, and the water leakage point cannot be found after the excavation is very easy.
Disclosure of Invention
The invention aims to provide a method for detecting leakage of a basement foundation surface with room subsoil, which solves the problems of complex treatment and low efficiency when a basement foundation raft leaks water in the prior art.
The invention aims to provide a system for detecting the leakage of the basement foundation surface of the subsoil with the room heart, which can quickly and accurately detect the water leakage point of a basement foundation raft when water leaks.
In order to achieve the above purpose, the embodiment of the present invention adopts the following technical solutions:
a method for detecting leakage of a foundation surface of a basement with room subsoil comprises the following steps:
on the basement foundation surface, a suspected seepage area is used as a detection area, and after the detection area is dug, the seepage flow direction is observed;
arranging an arrangement interval in the detection area after excavation;
water seepage parameters corresponding to the arrangement intervals are counted;
according to the water seepage parameters, obtaining a functional relation between the water seepage attenuation and the arrangement distance;
and calculating the position relation between the water seepage source and the detection area according to the functional relation.
In a preferred embodiment of the present invention,
the suspected leakage area is an area where open water appears on the basement foundation surface.
In a preferred embodiment of the present invention,
when the detection area is excavated, the excavated area is less than 1 square meter.
In a preferred embodiment of the present invention,
the arrangement distance refers to squares which are arranged in the detection area with the side length of 10-20 cm; and the square grids are arranged towards the rest basement foundation surface according to the seepage flow direction.
In a preferred embodiment of the present invention,
and the water seepage parameters corresponding to the statistical arrangement intervals are counted by adopting a water flow meter.
In a preferred embodiment of the present invention,
the water flow meter selects a Doppler current meter.
In a preferred embodiment of the present invention,
the water seepage parameters comprise water seepage speed and water flow.
In a preferred embodiment of the present invention,
the functional relationship refers to the functional relationship among water flow speed, water flow and arrangement spacing.
In a preferred embodiment of the present invention,
and calculating the position relation between the water seepage source and the detection area according to the functional relation, namely calculating the quantity of the arrangement intervals of the water seepage source from the detection area according to the functional relation among the water flow speed, the water flow and the arrangement intervals.
A leakage detection system for the foundation surface of a basement with room subsoil,
the leakage detection system for the foundation surface of the basement with room subsoil comprises a cutting device, a detection device and a computer;
observing the water seepage direction after the excavation device excavates the detection area;
the detection device is used for detecting water seepage parameters corresponding to the arrangement intervals in the detection area after excavation and acquiring and sending the water seepage parameters to the computer;
the computer obtains a functional relation between the water seepage attenuation and the arrangement distance according to the water seepage parameters; and calculating the position relation between the water seepage source and the detection area according to the functional relation.
The invention has the beneficial effects that:
the invention provides a method for detecting leakage of a foundation surface of a basement with room subsoil, which comprises the following steps: on the basement foundation surface, a suspected seepage area is used as a detection area, and after the detection area is dug, the seepage flow direction is observed. In the detection area after excavation, an arrangement pitch is set. And (5) counting the water seepage parameters corresponding to the arrangement intervals. And according to the water seepage parameters, obtaining a functional relation between the water seepage attenuation and the arrangement distance. And calculating the position relation between the water seepage source and the detection area according to the functional relation. The method can solve the problems of complex treatment and low efficiency when the basement foundation raft leaks water in the prior art. The method is simple to operate, large-area excavation is not needed, and labor and cost are saved.
The invention provides a leakage detection system for a basement foundation surface with room subsoil, which comprises a cutting device, a detection device and a computer. And observing the water seepage direction after the excavation device excavates the detection area. The detection device is used for detecting water seepage parameters corresponding to the arrangement intervals in the detection area after excavation and collecting and sending the water seepage parameters to the computer. The computer obtains a functional relation between the water seepage attenuation and the arrangement distance according to the water seepage parameters; and calculating the position relation between the water seepage source and the detection area according to the functional relation. The system can quickly and accurately detect the water leakage point of the basement foundation raft when water leakage occurs by adopting a simple method.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments.
All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The method for detecting leakage of foundation surface of a basement with room soil according to the embodiment of the invention is specifically described below.
The embodiment provides a method for detecting leakage of a basement foundation surface of a soil basement with a room, which comprises the following steps:
and S1, on the basement foundation surface, taking the suspected seepage area as a detection area, excavating the detection area, and observing the seepage flow direction.
Further, the suspected leakage area refers to an area where open water appears on the basement foundation surface.
Generally, when open water appears on the basement foundation surface, the leakage may appear below the basement foundation surface, but in many cases, due to the unevenness of the basement foundation surface, in combination with the property that water flow easily flows to a lower area, the corresponding open water area on the foundation surface cannot correspond to the underground leakage point.
Therefore, in this case, when the open water appears on the ground surface, only the open water spot can be determined as the suspected leak area. The suspected blowby area is further determined as the detection area, i.e. the excavation is made from the detection area.
Further, when the detection area is excavated, the area of excavation is less than 1 square meter.
The excavation of the detection area needs to be as small as possible, so that the damage to the whole basement foundation raft is small, and the subsequent repair work is small. And the labor can be saved to the maximum extent by using a smaller excavation, and the cost is saved. Compared with the method for excavating the part with the bright water in a large area in the prior art, the efficiency is greatly improved, and the detection period is saved.
Further, after the detection area is excavated, the flow direction of the seepage water is observed.
The seepage flow direction is observed after excavation, the property of the water flow is fully utilized, and therefore the favorable guarantee is provided for the follow-up determination of the direction of the arrangement interval, the operation efficiency is improved, and the detection period is shortened.
And S2, setting arrangement spacing in the detection area after excavation.
Further, the arrangement distance refers to squares arranged in the detection area with the side length of 10-20 cm; and the square grids are arranged towards the rest basement foundation surface according to the seepage flow direction.
Specifically, the region requiring further detection can be roughly determined according to the aforementioned determined seepage water flow direction.
And arranging grids in the determined area which needs to be detected further, different detection points can be arranged in the area, and further, the beneficial guarantee is provided for the subsequent detection of the related parameters of the groundwater corresponding to the detection points.
Furthermore, the arrangement space is set to be 10-20cm square grids, so that the detection accuracy can be improved, the excavation area of the basement foundation is smaller when a leakage point is found subsequently, the workload is further reduced, and the construction period is favorably shortened.
And S3, counting the water seepage parameters corresponding to the arrangement intervals.
Furthermore, the water seepage parameters corresponding to the statistical arrangement intervals are counted by adopting a water flow meter.
Specifically, in this embodiment, the flow meter is a doppler flow meter. Optionally, an ultrasonic doppler flow meter or a laser doppler flow meter is selected.
The laser Doppler current meter adopts laser to measure and has the advantages of high accuracy, non-contact measurement, quick dynamic response and the like. The method is widely applied to flow rate measurement. The ultrasonic Doppler current meter is a current meter made by applying the acoustic Doppler effect principle, and adopts an ultrasonic transducer to detect the flow velocity by ultrasonic waves.
The laser doppler flow meter or the ultrasonic doppler flow meter can be selected from the types and specifications which are common in the field.
In other alternative embodiments of the present invention, the above water flow meter may be selected from other applicable instruments capable of measuring water flow rate, which are commonly used in the art.
Further, the water seepage parameters comprise the water flow speed and the water flow of the seepage water.
The water flow speed and the water flow measured by the water flow meter can provide favorable guarantee for the subsequent calculation of the functional relationship among the water flow speed, the water flow and the arrangement distance.
And S4, obtaining a functional relation between the water seepage attenuation and the arrangement distance according to the water seepage parameters.
And calculating the functional relation among the water flow speed, the water flow and the arrangement intervals according to the determined water flow speed and water flow, further determining the functional relation between the water seepage attenuation and the arrangement intervals, and providing favorable guarantee for the subsequent calculation of the position relation between the water seepage source and the detection area.
And S5, calculating the position relation between the water seepage source and the detection area according to the functional relation.
And calculating the position relation between the water seepage source and the detection area according to the functional relation, namely calculating the quantity of the arrangement intervals of the water seepage source from the detection area according to the functional relation among the water flow speed, the water flow and the arrangement intervals.
The number of the water seepage sources from the arrangement intervals of the detection areas is calculated, so that the areas of the water seepage sources can be determined, and accurate positions are determined for subsequent excavation.
Some embodiments of the present invention also provide a system for detecting a leakage from a basement floor of a atrial earthen basement, the system including an excavation device, a detection device, and a computer;
observing the water seepage direction after the excavation device excavates the detection area;
the detection device is used for detecting water seepage parameters corresponding to the arrangement intervals in the detection area after excavation and acquiring and sending the water seepage parameters to the computer;
the computer obtains a functional relation between the water seepage attenuation and the arrangement distance according to the water seepage parameters; and calculating the position relation between the water seepage source and the detection area according to the functional relation.
The method for detecting the leakage of the foundation surface of the basement with the room and the subsoil provided by the embodiment of the invention is verified by combining the specific embodiment and the test example.
The method for detecting the leakage of the basement foundation surface with the room subsoil provided by the embodiment of the invention is adopted to detect 10 basement raft type foundations (respectively counted as NO1-NO10) with leakage.
And after cutting the region of the basement foundation surface with open water, observing the seepage direction. The general direction was determined from the water flow direction, along which the arrangement pitch of the grid shape was set with 10 × 10cm as a side length. And detecting the water flow speed and the water seepage amount of each arrangement point by adopting a laser Doppler current meter in the arrangement interval.
And taking the square grid where the open water is located as the origin of coordinates, continuously arranging the square grids outside the origin, and testing the corresponding water flow speed and water seepage amount in each square grid one by one along the water flow direction. In the direction of the water flow, a straight line is drawn from the origin, which line passes through the center point of each square.
The pitch is expressed as the number of squares passing in that direction from the origin.
The statistical data are shown in the following table:
| water velocity of origin | Water flow of origin | Velocity of water flow | Water flow rate | Arrangement distance of water seepage points | |
| NO 1 | 2.5m/s | 0.025m3/s | 6.5m/s | 0.065m3/s | 2000 |
| NO 2 | 1.5m/s | 0.015m3/s | 5.5m/s | 0.055m3/s | 1500 |
| NO 3 | 1.0m/s | 0.010m3/s | 5.0m/s | 0.050m3/s | 1000 |
| NO 4 | 1.2m/s | 0.012m3/s | 4.5m/s | 0.045m3/s | 1200 |
| NO 5 | 2.3m/s | 0.023m3/s | 6.0m/s | 0.060m3/s | 1800 |
| NO 6 | 2.1m/s | 0.021m3/s | 6.2m/s | 0.062m3/s | 1700 |
| NO 7 | 1.6m/s | 0.016m3/s | 5.4m/s | 0.054m3/s | 1300 |
| NO 8 | 2.4m/s | 0.024m3/s | 6.4m/s | 0.064m3/s | 1900 |
| NO 9 | 2.8m/s | 0.028m3/s | 7.3m/s | 0.073m3/s | 2400 |
| NO 10 | 2.0m/s | 0.020m3/s | 6.2m/s | 0.062m3/s | 1850 |
By adopting the method for detecting the leakage of the foundation surface of the basement with the room subsoil, provided by the embodiment of the invention, when the raft of the basement foundation leaks water, the leakage point can be accurately determined, the operation method is simple and easy to implement, the efficiency is high, large-area excavation is not needed, and the labor and the cost are saved.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A method for detecting leakage of a foundation surface of a basement with room subsoil is characterized by comprising the following steps:
cutting an area with open water on the basement foundation surface, and observing the seepage direction; determining the approximate direction according to the seepage flow direction, and setting the arrangement interval of a grid shape along the direction by taking 10cm by 10cm as the side length; detecting the water flow speed and the water seepage amount of each arrangement point by adopting a laser Doppler current meter in the arrangement interval;
taking a square grid where open water is located as an origin of coordinates, continuously arranging the square grids outside the origin of coordinates, and testing the corresponding water flow speed and water seepage amount in each square grid one by one along the water seepage flow direction; drawing a straight line from the origin of coordinates along the water seepage flow direction, wherein the straight line passes through the central point of each square;
arranging the spacing to be represented by the number of squares passing in the direction from the origin of coordinates; according to the water seepage parameters, obtaining a functional relation between the water seepage attenuation and the arrangement distance;
and calculating the position relation between the water seepage source and the detection area according to the functional relation.
2. The method of claim 1, wherein the method comprises the steps of,
and when the detection area is excavated, the excavated area is less than 1 square meter.
3. The method of claim 1, wherein the method comprises the steps of,
the functional relationship refers to the functional relationship among the water flow speed, the water seepage amount and the arrangement interval.
4. The method of claim 3, wherein the method comprises the steps of,
and calculating the position relation between the water seepage source and the detection area according to the functional relation, namely calculating the quantity of the arrangement intervals of the water seepage source from the detection area according to the functional relation among the water flow speed, the water seepage amount and the arrangement intervals.
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