CN107631839B - Waterproof test system for simulating underground structure and experimental method thereof - Google Patents
Waterproof test system for simulating underground structure and experimental method thereof Download PDFInfo
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- CN107631839B CN107631839B CN201710846215.9A CN201710846215A CN107631839B CN 107631839 B CN107631839 B CN 107631839B CN 201710846215 A CN201710846215 A CN 201710846215A CN 107631839 B CN107631839 B CN 107631839B
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- 238000012360 testing method Methods 0.000 title claims abstract description 31
- 238000002474 experimental method Methods 0.000 title abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 79
- 230000007246 mechanism Effects 0.000 claims abstract description 18
- 238000012544 monitoring process Methods 0.000 claims abstract description 17
- 230000000903 blocking effect Effects 0.000 claims description 11
- 238000010276 construction Methods 0.000 claims description 11
- 238000007789 sealing Methods 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 7
- 238000009792 diffusion process Methods 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 4
- 238000010998 test method Methods 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 4
- 238000009933 burial Methods 0.000 description 2
- 230000007123 defense Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 230000009471 action 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
- 230000002349 favourable effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The invention discloses a waterproof test system for an underground structure and an experimental method thereof. The invention has the advantages that: the invention provides an underground structure main body device for simulating an underground building structure, which is used for detecting the waterproof performance of the underground building structure through a monitoring mechanism by injecting water into a hollow cavity.
Description
Technical Field
The invention relates to the technical field of waterproof test of underground structures, in particular to a waterproof test system for simulating an underground structure and an experimental method thereof.
Background
In recent years, with the rapid development of urban construction in China, the construction scale of high-rise and super-high-rise buildings, civil air defense projects and municipal roads is continuously enlarged, so that the project projects of building basements, underground buildings, civil air defense projects and municipal underground passages are more and more, the burial depths are deeper and deeper, and however, the buildings are threatened by underground leakage to different degrees. Leakage water is one of the quality problems common to building basements and municipal basements.
In underground structures, the thin structures such as deformation joints, post-cast strips, construction joints, wall-penetrating pipelines and the like are waterproof weak positions, and leakage problems generally occur at the first positions.
Although the waterproof construction measures for these parts are specified in the current specifications, it is difficult to evaluate the actual waterproof effect. Particularly after these parts are subjected to external load, it is difficult to evaluate whether these structural measures can continue to maintain the original waterproof effect with a certain degree of damage. Particularly, under the condition of using a new waterproof structure and waterproof materials, the waterproof condition of the waterproof material needs to be tested under the action of a relatively real external environment to know the waterproof effect of the waterproof material.
For the waterproof construction of underground structures and the true waterproof performance of waterproof materials, few relevant comprehensive test results can be referred to. For example, a building structural design institute designs a waterproof structure according to specifications, and an enterprise producing a waterproof material only can independently test the waterproof performance of the corresponding waterproof material, but cannot test the waterproof performance of the whole structure after the waterproof material is applied to the waterproof structure. Therefore, besides field actual measurement, test means and devices capable of testing the actual waterproof performance of the underground structure are lacking at present.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to solve the problem that the actual waterproof performance of an underground mechanism cannot be measured in the prior art, and therefore, the invention provides a waterproof test system for an underground structure and an experimental method thereof.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the utility model provides a waterproof test system of analog underground structure, its characterized in that, this system includes underground structure main part device and monitoring mechanism, monitoring mechanism is including the infiltration rate sensor who detects underground structure main part device, and the detection end setting of infiltration rate sensor is on underground structure main part device lateral surface, the inside hollow cavity that holds water that sets up of underground structure main part device.
Optimally, a jacking loading device which is propped against the two side walls of the hollow cavity is arranged in the hollow cavity.
Optimally, the hollow cavity is provided with a water blocking area in the vertical direction, and the jacking loading devices are multiple and are arranged in an array in the vertical direction in the water blocking area.
Preferably, a pressure diffusion device is arranged between the underground structure main body device and the jacking loading device.
Preferably, the underground structure main body device comprises a plurality of waterproof weak parts, and the waterproof weak parts comprise one or more of wall penetrating pipelines, deformation joints, post-pouring belts and construction joints.
Optimally, the waterproof weak parts are provided with a water pressure control device and a pressurized water pump for pressurizing the inside of the water pressure control device.
Preferably, the monitoring mechanism further comprises a data acquisition device, a data processing and displaying device, a strain gauge and a water seepage rate sensor, wherein the strain gauge is connected with the data processing and displaying device through the data acquisition device respectively and is arranged at the weak part or the outer corner of the underground structure main body device.
Preferably, the underground structure main body device is provided with a water collecting channel which is closely arranged on the wall body on the bottom plate outside the underground structure main body device.
Preferably, the inner side wall of the underground structure main body device is provided with a waterproof structure.
A test method of the underground structure waterproof test system using the simulation applied lateral pressure comprises the following steps:
s1, preparing an underground structure main body device with a waterproof structure, wherein a waterproof weak part is arranged on the underground structure main body device, a water pressure control device is arranged at the waterproof weak part, a jacking loading device is arranged on a hollow cavity and props against two opposite side walls of the hollow cavity, and the control end of the monitoring mechanism is connected with the controlled end of the jacking loading device;
s2, injecting water into the hollow cavity and the water pressure control device;
s3, the monitoring mechanism controls the jacking loading device to step up the underground structure main body device and increases working stress step by step, so that the underground structure main body device is in a lateral stress state, and the waterproof performance and the leakage characteristic of the underground water structure main body device and the waterproof weak part in a still water environment are tested.
The invention has the advantages that:
1) The invention provides an underground structure main body device for simulating an underground building structure, which is used for detecting the waterproof performance of the underground building structure through a monitoring mechanism by injecting water into a hollow cavity.
2) The jacking loading device applies lateral pressure, simulates the lateral pressure of the soil layer to the underground structure main body device, and is favorable for obtaining a real waterproof test result.
3) The pressure diffusion device of the present invention is designed to disperse the applied force to the underground structure body device, and to simulate the lateral pressure in the actual environment.
4) The underground structure main body device is provided with a waterproof weak part, so that the underground structure in reality can be simulated more practically.
5) Placing a water pressure control device to increase the water pressure of the test part according to the test requirement; during the test, water is injected into the hollow cavity in the underground structure main body device and the water pressure control device, and then the lateral pressure of the water pressure control device, which is weak to water, is regulated by the pressurized water pump so as to meet the test requirement.
6) The invention can also set up a plurality of waterproof weak positions in the underground structure main body device according to the need, the waterproof weak positions include but are not limited to deformation joints, post-pouring belts, construction joints and wall penetrating pipelines, namely the invention can set up the common waterproof detailed structures in the underground structure main body device in a concentrated way, so that a plurality of waterproof test results of the waterproof detailed structures can be obtained through one test, and the whole device in the invention becomes a comprehensive test device, thus greatly improving the test efficiency.
7) The invention has good expansibility, namely, when the underground structure main body device is manufactured, the corresponding waterproof weak part or waterproof measure can be added or reduced, so that the waterproof function of the related waterproof detail structure can be tested more pertinently.
Drawings
FIG. 1 is a schematic diagram of a comprehensive test platform for waterproof test of an underground structure.
Fig. 2 and 3 are sectional views A-A of fig. 1.
Fig. 4 is a B-B cross-sectional view of fig. 1.
Fig. 5 is a schematic structural view of a plurality of jacking loading devices.
The meaning of the labels in the figures is as follows:
10-underground structure main body device 11-jacking loading device 12-pressure diffusion device
13-waterproof structure 14-through-wall pipeline 15-deformation joint 16-post-pouring strip 17-construction joint
18-water collecting channel 20-water pressure control device 21-pressurized water pump 22-water blocking area
23-pressure sensor 30-hollow cavity 40-data acquisition device
50-data processing and display device 60-Water
Detailed Description
As shown in fig. 1 to 5, a simulated underground structure waterproof test system comprises an underground structure main body device 10 and a monitoring mechanism, wherein the underground structure main body device 10 accords with a reinforced concrete structure prepared from materials specified in the underground engineering waterproof technical Specification. The specific dimensions of the underground structure body apparatus 10 simulating the underground structure can be adjusted according to actual needs during manufacturing.
The underground structure main body device 10 is internally provided with a hollow cavity 30 for containing water, and a jacking loading device 11 which is used for jacking two side walls of the hollow cavity 30 is arranged in the hollow cavity 30. Wherein the jacking loading device 11 is a side pressure simulating earth. A pressure diffusion device 12 is provided between the underground structure body device 10 and the jacking loading device 11. To simulate the side pressure in the actual environment truly and effectively. Specifically, the jacking device 11 is a hydraulic jacking device.
The jacking loading device 11 has two setting modes, the first is shown in fig. 4, and the jacking loading device 11 is arranged in the hollow cavity 30 and is positioned above the liquid level. Second, as shown in fig. 5, the hollow cavity 30 is provided with a water blocking area 22 in the vertical direction, and the jacking loading devices 11 are multiple and are arranged in an array in the vertical direction in the water blocking area 22. The jacking loading devices 11 of the vertical direction array gradually increase from top to bottom, simulate the lateral pressure of soil in actual conditions, and in order to prevent the jacking devices 11 from being immersed in water, the water blocking areas 22 are arranged, wherein the water blocking areas 22 can be made of water blocking materials with certain elasticity, so that the jacking loading devices 11 cannot damage the water blocking areas 22 during operation. The jacking-loading device 11 in both of the above solutions is isolated from the water in the hollow cavity 30.
The underground structure body apparatus 10 includes a plurality of waterproof weak points including one or more of a through-wall pipe 14, a deformation joint 15, a post-cast strip 16, and a construction joint 17. The setting position of the waterproof weak part can be adjusted according to actual needs, and the types can be added or reduced according to actual conditions. In this embodiment, the waterproof weak points include four cases of the through-wall pipe 14, the deformation joint 15, the post-cast strip 16 and the construction joint 17.
The water pressure control device 20 and the pressurized water pump 21 for pressurizing the water pressure control device 20 are arranged at the waterproof weak positions, wherein the water pressure control device 20 and the pressurized water pump 21 are connected to form a sealing structure. Preferably, a pressure sensor 23 is arranged inside the water pressure control device 20 and near the waterproof weak part, and the output end of the pressure sensor 23 is led out from the sealing structure and connected with the data acquisition device 40, and the sealing part is sealed by a sealing ring (not shown in the figure). According to the actual needs, the water pressure control device 20 simulates the test states under different water pressures, and can more scientifically and effectively simulate the waterproof problem of the deep burial depth in the actual engineering. The underground structure body device 10 is provided with a water collecting channel 18 which is arranged close to the wall body on the bottom plate of the outer part. The inside wall of the underground structure body device 10 is provided with a waterproof structure 13. This also makes it possible to test the waterproof ability of the underground structure body device 10 under the influence of the waterproof structure 13. The water pressure control device 20 is composed of two parts, which are respectively arranged at the inner side and the outer side of the wall body, wherein the outer side of the wall body electromagnetically attracts the inner side of the wall body through the waterproof weak part, and the water pressure control device 20 and the waterproof weak part of the inner side of the wall body form a closed section. Wherein the outside part of the wall body is an electromagnetic component, and the materials used in the outside part of the wall body can be absorbed by electromagnetism. Therefore, the inner part and the outer part can be attracted to each other, and are closely attached to the waterproof weak part, so that the effect of compactness is achieved. And the inner wall portion of the water pressure control device 20 can be removed by reducing the electromagnetic strength of the outer wall portion.
The monitoring mechanism comprises a water seepage rate sensor, a strain gauge, a data acquisition device 40 and a data processing and displaying device 50 for detecting the underground structure main body device 10, wherein the water seepage rate sensor and the strain gauge are multiple, and the detection end of the water seepage rate sensor and the detection end of the strain gauge are respectively arranged on the outer side surface of the underground structure main body device 10 and are specifically positioned at a waterproof weak part and an outer corner of the underground structure main body device 10. The pressure sensor 23, the water seepage rate sensor and the strain gauge are respectively connected with a data processing and displaying device 50 through a data acquisition device 40. Wherein the strain gauge detects stresses and strains at the waterproof weak points and corners of the underground structural body device 10. The monitoring mechanism can obtain the internal force and deformation of the underground structure body device 10 and the leakage condition of the water 60 during the test.
The invention is described in further detail below in connection with specific test procedures.
The test method of the underground structure waterproof test system using the side pressure applied simulation comprises the following steps:
s1, preparing an underground structure main body device 10 with a waterproof structure 13, wherein the underground structure main body device 10 is provided with a waterproof weak part, a water pressure control device 20 is arranged at the waterproof weak part, a jacking loading device is arranged on a hollow cavity 30 and props against two opposite side walls of the hollow cavity 30, and the control end of a monitoring mechanism is connected with the controlled end of the jacking loading device 11;
s2, injecting water into the hollow cavity 30 and the water pressure control device 20, wherein the water injection amount is injected step by step according to the preset water pressure of the test scheme;
s3, the monitoring mechanism controls the jacking loading device 11 to apply and gradually increase working stress to the underground structure main body device 10, so that the underground structure main body device 10 is in a lateral stress state, and the waterproof performance and leakage characteristics of the underground water structure main body device and the waterproof weak part in a still water environment are tested.
The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the present invention, and any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (2)
1. The system is characterized by comprising an underground structure main body device (10) and a monitoring mechanism, wherein the monitoring mechanism comprises a water seepage rate sensor for detecting the underground structure main body device (10), a detection end of the water seepage rate sensor is arranged on the outer side surface of the underground structure main body device (10), and a hollow cavity (30) for containing water is arranged inside the underground structure main body device (10);
a jacking loading device (11) which is used for jacking two side walls of the hollow cavity (30) is arranged in the hollow cavity (30);
the hollow cavity (30) is provided with a water blocking area (22) in the vertical direction, and the jacking loading devices (11) are multiple and are arranged in an array in the vertical direction in the water blocking area (22);
a pressure diffusion device (12) is arranged between the underground structure main body device (10) and the jacking loading device (11);
the underground structure main body device (10) comprises a plurality of waterproof weak parts, wherein the waterproof weak parts comprise one or more of a wall penetrating pipeline (14), a deformation joint (15), a post-pouring belt (16) and a construction joint (17);
the waterproof weak parts are respectively provided with a water pressure control device (20) and a pressurized water pump (21) for pressurizing the inside of the water pressure control device (20);
the water pressure control device (20) is connected with the pressurized water pump (21) to form a sealing structure, a pressure sensor (23) is arranged in the water pressure control device (20) and close to a waterproof weak part, the output end of the pressure sensor (23) is led out of the sealing structure and is connected with the data acquisition device (40), and the sealing part is sealed by a sealing ring;
the monitoring mechanism further comprises a data acquisition device (40), a data processing and displaying device (50) and a strain gauge, wherein the water seepage rate sensor and the strain gauge are respectively connected with the data processing and displaying device (50) through the data acquisition device (40), and the strain gauge is arranged at the weak part and/or the outer corner of the underground structure main body device (10);
the underground structure main body device (10) is provided with a water collecting channel (18) which is arranged close to a wall body on a bottom plate outside the underground structure main body device;
the inner side wall of the underground structure main body device (10) is provided with a waterproof structure (13).
2. A test method using the simulated underground structure waterproof test system of claim 1, comprising the steps of:
s1, preparing an underground structure main body device (10) with a waterproof structure (13), wherein a waterproof weak part is arranged on the underground structure main body device (10), a water pressure control device (20) is arranged at the waterproof weak part, a jacking loading device (11) is arranged on a hollow cavity (30) and props against two opposite side walls of the hollow cavity (30), and a control end of the monitoring mechanism is connected with a controlled end of the jacking loading device (11);
s2, injecting water into the hollow cavity (30) and the water pressure control device (20);
s3, the monitoring mechanism controls the jacking loading device (11) to apply and gradually increase working stress to the underground structure main body device (10) so that the underground structure main body device (10) is in a lateral stress state, and the waterproof performance and leakage characteristics of the underground water structure main body device (10) and the waterproof weak part in a still water environment are tested.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007256178A (en) * | 2006-03-24 | 2007-10-04 | Univ Nihon | Test method of concrete waterproof layer, and testing machine using same |
| KR20110033537A (en) * | 2009-09-25 | 2011-03-31 | 한국전력공사 | Apparatus for testing waterproof ability by high hydro pressure |
| CN102493500A (en) * | 2011-12-06 | 2012-06-13 | 湖北省电力勘测设计院 | Foundation base model test device capable of bidirectional loading |
| CN103196808A (en) * | 2013-03-27 | 2013-07-10 | 山东大学 | Water seepage collecting and testing system for fluid-solid coupling test |
| CN103884831A (en) * | 2014-04-04 | 2014-06-25 | 云南省交通规划设计研究院 | Multifunctional three-dimensional model testing platform for roadbed slope and underground engineering |
| CN104458534A (en) * | 2014-12-10 | 2015-03-25 | 西安科技大学 | Simulation test device and simulation test method for coal measure strata fracture seepage under loading and unloading conditions |
| CN106940233A (en) * | 2017-04-01 | 2017-07-11 | 合肥工业大学 | A kind of underground structure waterproof test all-around test stand and its test method |
| CN207779618U (en) * | 2017-09-19 | 2018-08-28 | 合肥工业大学 | A kind of simulation underground structure water-proof investigating system |
-
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- 2017-09-19 CN CN201710846215.9A patent/CN107631839B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007256178A (en) * | 2006-03-24 | 2007-10-04 | Univ Nihon | Test method of concrete waterproof layer, and testing machine using same |
| KR20110033537A (en) * | 2009-09-25 | 2011-03-31 | 한국전력공사 | Apparatus for testing waterproof ability by high hydro pressure |
| CN102493500A (en) * | 2011-12-06 | 2012-06-13 | 湖北省电力勘测设计院 | Foundation base model test device capable of bidirectional loading |
| CN103196808A (en) * | 2013-03-27 | 2013-07-10 | 山东大学 | Water seepage collecting and testing system for fluid-solid coupling test |
| CN103884831A (en) * | 2014-04-04 | 2014-06-25 | 云南省交通规划设计研究院 | Multifunctional three-dimensional model testing platform for roadbed slope and underground engineering |
| CN104458534A (en) * | 2014-12-10 | 2015-03-25 | 西安科技大学 | Simulation test device and simulation test method for coal measure strata fracture seepage under loading and unloading conditions |
| CN106940233A (en) * | 2017-04-01 | 2017-07-11 | 合肥工业大学 | A kind of underground structure waterproof test all-around test stand and its test method |
| CN207779618U (en) * | 2017-09-19 | 2018-08-28 | 合肥工业大学 | A kind of simulation underground structure water-proof investigating system |
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