CN113029760A - Test device for simulating water pressure in tunnel lining - Google Patents
Test device for simulating water pressure in tunnel lining Download PDFInfo
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- CN113029760A CN113029760A CN202110420168.8A CN202110420168A CN113029760A CN 113029760 A CN113029760 A CN 113029760A CN 202110420168 A CN202110420168 A CN 202110420168A CN 113029760 A CN113029760 A CN 113029760A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a test device for simulating water pressure in a tunnel lining, which comprises a water pressure loading device and an inner support device, wherein the inner support device is sleeved in the lining, a sealed inner water pressure cavity is enclosed between the inner support device and the lining, the inner water pressure cavity is provided with a water inlet pipe and an exhaust pipe, and the water inlet pipe is communicated with the water pressure loading device. The test device forms a closed cavity through the inner support device and the tunnel lining, directly fills water into the cavity and pressurizes the cavity, ensures that the tunnel lining is subjected to uniform and stable water pressure, can directly detect the construction quality of tunnel lining concrete, and can detect the water stopping effect among segments at the same time, thereby providing reliable test data for the design and construction of the tunnel lining.
Description
Technical Field
The invention relates to an experimental device for simulating high internal water pressure of a tunnel lining, and belongs to the technical field of civil engineering.
Background
In recent years, the construction of water delivery engineering is greatly supported by the nation. The water delivery tunnel prestressed lining is an important component of the engineering in water delivery engineering, the tunnel lining is under the action of external water pressure and surrounding rock pressure and internal water pressure during service, the lining deforms outwards under the action of high internal water pressure, and the lining concrete can generate tensile stress. When the tensile stress reaches a certain level, the lining concrete cracks to be damaged. Therefore, an internal hydraulic test is needed to simulate the internal hydraulic pressure of the tunnel lining during service, and the stress state of the tunnel lining during service is determined.
The traditional simulated internal water pressure mainly comprises the following two types: firstly, set up the counter-force support inside the tunnel lining cutting and arrange a plurality of cushions with the lining cutting internal surface, then lie in the jack between support and the cushion through the loading to transmit the load of applying for the lining cutting through the cushion and be used for simulating interior water pressure. The method is simple and convenient to construct, but the lining is locally stressed unevenly due to the fact that the lining is large in hole diameter and the cushion blocks have certain intervals, and uniform internal water pressure cannot be simulated effectively. Secondly, in the construction site, the two ends of the tunnel lining opening are plugged, water is injected and pressurized through the water inlet hole and the exhaust hole, the pressure gauge monitors the water pressure, the mode can realize uniform internal water pressure, but the defect is obvious, the diameter of the tunnel lining is large, so the water consumption is large, the test difficulty is increased by the conveying and discharging of test water and corresponding supporting measures, meanwhile, under the condition of high water pressure, the severe requirements on the plugging of the two ends of the tunnel lining are also met, and the water pressure is easy to cause the water seepage phenomenon, so that the water pressure can not continuously maintain the high water pressure state.
At present, a device for simulating internal water pressure is to fix a flexible container on a reliable counterforce device, the part contacting with the inner surface of a tunnel lining is made of rubber materials or thin steel plates, and the internal water pressure is simulated by pressurizing gas or liquid to the flexible container.
Disclosure of Invention
In view of the above, the present invention provides a testing device for simulating high internal water pressure of tunnel lining, which can be used for an original test outside a water delivery tunnel, can simulate the effect of internal water pressure on the tunnel lining more truly, and can determine the stress law of the tunnel lining by matching with a tunnel lining monitoring system and an external water pressure and surrounding rock pressure loading device, detect the construction quality and the segmental water stop effect of the lining, and provide reliable test data for the design and construction of the tunnel lining.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a test device of water pressure in simulation tunnel lining cutting, includes water pressure loading device, still includes interior support arrangement, interior support arrangement cover is established in the lining cutting, encloses into sealed interior water pressure cavity between interior support arrangement and the lining cutting, and interior water pressure cavity is provided with inlet tube and blast pipe, inlet tube and water pressure loading device intercommunication.
The tunnel lining water pressure test device comprises an inner support device, a lining, a water pressure cavity and a water pressure cavity, wherein the inner support device is connected with the lining through a water pressure pipeline, the water pressure cavity is sealed by the inner support device, the water pressure cavity is sealed by the annular vertical plate, and the annular vertical plate is sealed by the lining.
Above-mentioned tunnel lining internal water pressure's test device, set up inlet valve and water pressure gauge on the inlet tube, set up the air discharge valve on the blast pipe.
Above-mentioned tunnel lining cutting internal water pressure's test device, lining cutting both ends inner wall all pre-buried has radial crown plate and pre-buried crown plate, still is provided with the axial crown plate on lining cutting both ends inner wall, radial crown plate and axial crown plate fixed connection, and the axial crown plate stretches out outside the lining cutting, and the top and the axial crown plate fixed connection bottom and the interior support device fixed connection of hoop riser.
The inner support device is composed of an outer steel cylinder, an inner steel cylinder and a concrete layer between the outer steel cylinder and the inner steel cylinder, the bottoms of the outer steel cylinder and the inner steel cylinder are straight sections, the upper portion of the outer steel cylinder and the upper portion of the inner steel cylinder are arc-shaped and consistent with the lining, I-shaped steel is embedded in concrete between the outer steel cylinder and the inner steel cylinder of the straight sections, and longitudinal rib plates are embedded in concrete between the outer steel cylinder and the inner steel cylinder of the upper portion.
The device for testing the water pressure in the tunnel lining is characterized in that the inner steel cylinder is internally provided with a ring support in a sleeved mode.
The device for testing the water pressure in the tunnel lining is characterized in that the outer steel cylinder and the inner steel cylinder are connected, and end plates are arranged at two ends of the outer steel cylinder and the two ends of the inner steel cylinder.
Above-mentioned test device of water pressure in the tunnel lining cutting, the lining cutting outside is equipped with the shield and constructs the section of jurisdiction and place on the tunnel support.
According to the device for testing the water pressure in the tunnel lining, the two ends of the inner supporting device are fixed on the inner supporting support.
Above-mentioned test device of water pressure in the tunnel lining, still be provided with two I-steel between interior support bearing and the interior strutting arrangement, it is more firm.
By adopting the technical scheme, the invention has the following technical effects:
the test device forms a closed cavity through the inner support device and the tunnel lining, directly fills water into the cavity and pressurizes the cavity, ensures that the tunnel lining is subjected to uniform and stable water pressure, can directly detect the construction quality of tunnel lining concrete, and can detect the water stopping effect among segments at the same time, thereby providing reliable test data for the design and construction of the tunnel lining.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
FIG. 2 is a schematic cross-sectional view of the present invention.
Fig. 3 is a structural view of an internal water pressure cavity of the present invention.
Fig. 4 is a schematic view of the hydraulic loading device of the present invention.
In the figure: 1-lining; 2-shield segment; 3-an inner support means; 4-internal water pressure cavity; 5, supporting a support inside; 6-tunnel support; 7-an exhaust valve; 8-a water inlet valve; 9-water pressure gauge; 10-a voltage stabilizing box; 11-surge tank valve; 12-a pressure water pump; 13-outer steel cylinder; 14-inner steel cylinder, 15-ring support; 16-i-section steel; 17-longitudinal ribs; 18-an end plate; 19-double H-steel; 20-horizontal push plate; 21-circumferential vertical plate; 22-axial ring plate; 23-a radial ring plate; 24-pre-burying a ring plate; 25-concrete layer.
Detailed Description
As shown in fig. 1-4, a test device for simulating water pressure in a tunnel lining comprises a water pressure loading device and further comprises an inner support device 3, wherein the inner support device is sleeved in a lining 1, a shield segment 2 is further installed outside the lining, a sealed inner water pressure cavity 4 is formed by enclosing the inner support device and the lining, a water inlet pipe and an exhaust pipe are arranged in the inner water pressure cavity, and the water inlet pipe is communicated with the water pressure loading device.
According to the test device for the internal water pressure of the tunnel lining, the two ends of the internal support device and the lining are respectively provided with the annular vertical plate 21 for sealing, and a sealed internal water pressure cavity 4 is enclosed among the internal support device 3, the annular vertical plate 21 and the lining 1.
According to the device for testing the water pressure in the tunnel lining, the water inlet pipe is provided with the water inlet valve 8 and the water pressure gauge 9, and the exhaust pipe is provided with the exhaust valve.
Above-mentioned tunnel lining cutting internal water pressure's test device, lining cutting both ends inner wall all pre-buried have radial crown plate 23 and pre-buried crown plate 24, still be provided with axial crown plate 22 on lining cutting both ends inner wall, radial crown plate and pre-buried crown plate and axial crown plate fixed connection, the axial crown plate stretches out outside the lining cutting, the top and the axial crown plate 22 fixed connection of hoop riser 21, bottom and 3 fixed connection of interior strutting arrangement, for whole more firm, still be provided with horizontal push plate 20 in the outside of hoop riser.
The number of the radial ring plates is two, namely a radial ring plate 23 and an embedded ring plate 24
The inner support device is composed of an outer steel cylinder 13, an inner steel cylinder 14 and a concrete layer 25 between the outer steel cylinder and the inner steel cylinder, the bottoms of the outer steel cylinder and the inner steel cylinder are straight sections, the upper portion of the outer steel cylinder and the upper portion of the inner steel cylinder are arc-shaped and consistent with the lining, I-shaped steel 16 is embedded in concrete between the outer steel cylinder and the inner steel cylinder of the straight sections, and longitudinal rib plates 17 are embedded in concrete between the outer steel cylinder and the inner steel cylinder of the upper portion.
Above-mentioned test device of water pressure in the tunnel lining, interior steel cylinder endotheca is equipped with ring support 15.
The device for testing the water pressure in the tunnel lining is characterized in that the outer steel cylinder and the inner steel cylinder are connected, and the end plates 18 are arranged at two ends of the outer steel cylinder and the two ends of the inner steel cylinder.
Above-mentioned test device of water pressure in the tunnel lining cutting, the lining cutting outside is equipped with the shield and constructs the section of jurisdiction and place on tunnel support 6.
Above-mentioned test device of water pressure in the tunnel lining, inner support device's both ends are fixed on inner support 5, still are provided with double I-steel between inner support and the inner support device, and are more firm.
The lining 1 of the invention is a prestressed lining structure with the inner diameter of 6400mm and the outer diameter of 7500mm, and the test length is 9960 mm.
The inner hydraulic cavity 4 needs to embed an embedded 150mm radial ring plate 23 and an embedded ring plate 24 in the lining 1 in advance along the cross section of the end part, and weld the axial ring plate 22 with the embedded 150mm radial ring plate 23 and the embedded ring plate 24 and extend out of the end surface of the lining 1 by 100mm, wherein the axial ring plate 22 can be a whole or can be welded into a whole in a segmented mode, the thickness of the axial ring plate steel plate is 10mm thick, and other structures are 20mm thick steel plates.
The inner supporting device 3 is composed of an outer steel cylinder 13, an inner steel cylinder 14, a ring support 15, I-shaped steel 16, longitudinal rib plates 17, end plates 18 and a concrete layer 25, wherein the thickness of the steel plate is 10mm thick, C50 concrete is used and is the same as concrete for lining, the longitudinal rib plates 17 are arranged along the outer steel cylinder 13 at intervals of 15 degrees, the I-shaped steel 16 is welded on the surface of a straight section at the bottom so as to ensure that the inner supporting device 3 guarantees the safety of the structure in the lifting and hydraulic pressure loading test processes, and double I-shaped steel 19 is arranged at the support so as to strengthen the support and guarantee that the support is not damaged.
And after the strength of the concrete reaches the requirement, the inner supporting device 3 is jacked to a set position by using a jack, and a cushion block is arranged at the position of the inner supporting support, the jack is removed, and the inner supporting support is placed on the inner supporting support 5. The annular riser 21 is welded along the outer steel cylinder 13 and is welded with the axial annular plate 22 to form the inner hydraulic cavity 4. Horizontal push plates 20 are welded to the outer sides of the annular vertical plates 21 and are welded to the outer steel cylinder 13, and the lining end portion is prevented from being pulled apart due to excessive horizontal force.
The water is injected into the internal water pressure cavity and pressurized through the pressure water pump 12, the pressure water pump 12 can adjust different water outlet pressures, the pressure stabilizing box valve 11, the water inlet valve 8 and the exhaust valve 7 are opened until the internal water pressure cavity is filled with water, the pressure water pump 12 and all the valves are closed, the pressure water pump 12 and all the valves are kept stand for a period of time according to a set scheme, the sealing condition of the internal water pressure cavity is detected, after the detection is qualified, the pressure water pump 12 is pressurized step by step and stabilized until the specified simulated water pressure is achieved, and the water pressure is monitored through the.
And opening an exhaust valve 7 to slowly unload water pressure, repeating the pressurizing process for 2 times, simulating the water filling and draining working conditions of the tunnel lining, and collecting the mechanical characteristics of the tunnel lining during the period through a monitoring system.
Technical means disclosed in the technical solution of the present invention are not limited to the technical means disclosed in the above embodiments, and include technical solutions formed by arbitrary combinations of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and such improvements and modifications are also considered to be within the scope of the present invention.
Claims (10)
1. The utility model provides a test device of water pressure in simulation tunnel lining, includes water pressure loading device, its characterized in that: the lining structure is characterized by further comprising an inner supporting device, the inner supporting device is sleeved in the lining, a sealed inner water pressure cavity is formed between the inner supporting device and the lining, a water inlet pipe and an exhaust pipe are arranged in the inner water pressure cavity, and the water inlet pipe is communicated with the water pressure loading device.
2. The apparatus for testing water pressure in a tunnel lining according to claim 1, wherein: and two ends of the inner supporting device and the lining are respectively provided with an annular vertical plate for sealing, and a sealed inner water pressure cavity is enclosed among the inner supporting device, the annular vertical plates and the lining.
3. The apparatus for testing water pressure in a tunnel lining according to claim 1, wherein: the water inlet pipe is provided with a water inlet valve and a water pressure gauge, and the exhaust pipe is provided with an exhaust valve.
4. The apparatus for testing water pressure in a tunnel lining according to claim 2, wherein: the inner walls at two ends of the lining are all pre-embedded with radial annular plates and pre-embedded annular plates, the inner walls at two ends of the lining are also provided with axial annular plates, the radial annular plates are fixedly connected with the axial annular plates, the axial annular plates extend out of the lining, and the tops of the circumferential vertical plates are fixedly connected with the bottoms of the axial annular plates and the inner supporting devices.
5. The apparatus for testing water pressure in a tunnel lining according to claim 1, wherein: the inner support device is composed of an outer steel cylinder, an inner steel cylinder and a concrete layer between the outer steel cylinder and the inner steel cylinder, the bottoms of the outer steel cylinder and the inner steel cylinder are straight sections, the upper portions of the outer steel cylinder and the inner steel cylinder are arc-shaped and consistent with lining, I-shaped steel is embedded in concrete between the outer steel cylinder and the inner steel cylinder of the straight sections, and longitudinal rib plates are embedded in concrete between the outer steel cylinder and the inner steel cylinder of the upper portions.
6. The apparatus for testing water pressure in a tunnel lining of claim 5, wherein: and a ring support is sleeved in the inner steel cylinder.
7. The apparatus for testing water pressure in a tunnel lining of claim 5, wherein: the outer steel cylinder and the inner steel cylinder are connected, and end plates are arranged at two ends of the outer steel cylinder and the two ends of the inner steel cylinder.
8. The apparatus for testing water pressure in a tunnel lining of claim 1, wherein: the outside of lining cutting is equipped with the shield and constructs the section of jurisdiction, and the shield section of jurisdiction is placed on the tunnel support.
9. The apparatus for testing water pressure in a tunnel lining of claim 1, wherein: and two ends of the inner supporting device are fixed on the inner supporting support.
10. The apparatus for testing water pressure in a tunnel lining of claim 9, wherein: and double I-shaped steel is arranged between the inner support and the inner support device, so that the support is more stable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110420168.8A CN113029760A (en) | 2021-04-19 | 2021-04-19 | Test device for simulating water pressure in tunnel lining |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110420168.8A CN113029760A (en) | 2021-04-19 | 2021-04-19 | Test device for simulating water pressure in tunnel lining |
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| Publication Number | Publication Date |
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| CN113029760A true CN113029760A (en) | 2021-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110420168.8A Pending CN113029760A (en) | 2021-04-19 | 2021-04-19 | Test device for simulating water pressure in tunnel lining |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113848122A (en) * | 2021-08-17 | 2021-12-28 | 长江水利委员会长江科学院 | Hydraulic tunnel surrounding rock and lining structure simulation test method considering external water pressure |
| CN114526889A (en) * | 2022-02-16 | 2022-05-24 | 华电西藏能源有限公司大古水电分公司 | Based on tunnel lining cutting test device for structural model |
| CN115420612A (en) * | 2022-09-02 | 2022-12-02 | 中建工程产业技术研究院有限公司 | Device and method for simulating and testing water pressure in shield tunnel lining segment |
-
2021
- 2021-04-19 CN CN202110420168.8A patent/CN113029760A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113848122A (en) * | 2021-08-17 | 2021-12-28 | 长江水利委员会长江科学院 | Hydraulic tunnel surrounding rock and lining structure simulation test method considering external water pressure |
| CN114526889A (en) * | 2022-02-16 | 2022-05-24 | 华电西藏能源有限公司大古水电分公司 | Based on tunnel lining cutting test device for structural model |
| CN115420612A (en) * | 2022-09-02 | 2022-12-02 | 中建工程产业技术研究院有限公司 | Device and method for simulating and testing water pressure in shield tunnel lining segment |
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