CN210396729U - Water bag type shield tunnel outside soil pressure measuring device - Google Patents
Water bag type shield tunnel outside soil pressure measuring device Download PDFInfo
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- CN210396729U CN210396729U CN201921009611.7U CN201921009611U CN210396729U CN 210396729 U CN210396729 U CN 210396729U CN 201921009611 U CN201921009611 U CN 201921009611U CN 210396729 U CN210396729 U CN 210396729U
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Abstract
The utility model relates to a water bag type shield tunnel outside soil pressure measuring device, which comprises a water bag, a sealing box hermetically connected with the end part of the water bag, a water inlet pipe and an exhaust pipe, and is characterized in that a heater used for maintaining constant water temperature in the water bag is arranged in the water bag; the water inlet pipe is used for injecting water into the water sac and comprises an outer box water inlet pipe and an inner box water inlet pipe which are connected; the exhaust pipe is used for exhausting air in the water bag and comprises an outer box exhaust pipe and an inner box exhaust pipe which are connected; a pressure liquid level transmitter for measuring the liquid level and the pressure in the water bag is fixedly connected at the junction of the sealing box and the water bag; and the data transmission line of the heater and the data transmission line of the pressure liquid level transmitter are sent out of the sealing box. The utility model has the characteristics of sensitivity is high, measures accurately.
Description
Technical Field
The utility model belongs to the technical field of the tunnel engineering test, a water pocket formula shield tunnel outside soil pressure measurement device is related to.
Background
The speed of the urbanization process in China is continuously accelerated, higher requirements are put forward on the number and the scale of urban underground traffic lines, tunnel engineering is a main construction mode of urban underground rail traffic, and scientific and reliable monitoring instruments and modes are important foundations for ensuring the safety and the economic benefit of the urban tunnel engineering. The shield tunnel has the advantages of high construction speed, high automation degree, small influence on the surrounding environment and the like, and is widely applied to urban tunnel construction. The shield tunnel lining is contacted with the outside soil body through the grouting liquid, and the pressure change of the outside soil body has direct influence on the safety of the tunnel lining and the water resistance of a tunnel joint, so that the long-term, accurate and convenient monitoring of the outside soil pressure of the tunnel has a vital effect on the safety and durability of the tunnel.
The existing shield tunnel outside soil pressure monitoring method mainly adopts the traditional soil pressure box pressure measurement method, the method buries the soil pressure box in the segment lining outside in advance, keeps the outer membrane of the soil pressure box parallel to the lining outside, but the method has more problems, and the main problems are as follows:
1. the position of the soil pressure cell is easy to be influenced by construction to generate deviation
Soil pressure cell is the punctiform in the tunnel section of jurisdiction outside and arranges, and is less with tunnel section of jurisdiction area of contact, is difficult for pasting or installing on the outside section of jurisdiction, assembles during the construction and causes soil pressure cell to arrange the skew easily, and the offset can reach 10cm, the soil pressure change of unable accurate measurement assigned position department.
2. Lead hole of soil pressure cell weakens bearing capacity of pipe piece
Soil pressure cell lead wire need be drawn forth through the inside perforation of section of jurisdiction, and the pin hole has reduced the structural integrity of section of jurisdiction, causes the section of jurisdiction damage, leads to segment lining structural strength to descend, has weakened the section of jurisdiction bearing capacity.
3. The lead hole of the earth pressure cell is easy to cause water leakage
The soil pressure cell lead wire is perforated through the segment and is taken out, when reducing the segment integrity, has also destroyed the leakproofness of segment, and the contact is inseparable between the rubber protection layer of lead wire and the segment, arouses the percolating water phenomenon easily, has reduced segment lining's durability and suitability.
4. Inaccurate measurement result
The soil pressure cell is pre-buried in the section of jurisdiction outside, and after the slip casting behind the wall, wrapped up by the slip casting liquid, unable direct contact outside soil body, soil pressure cell sensitivity descends thereupon, leads to the measuring result inaccurate.
The existing method for measuring the soil pressure by using the film has the defects of insensitive soil pressure detection, low measurement precision, high price of the film, capability of reaching 28 ten thousand yuan per 1 square meter of the film and poor economy due to the thick material of the film.
SUMMERY OF THE UTILITY MODEL
The utility model provides a survey soil pressure sensitively, the higher and cheaper water pocket formula shield tunnel outside soil pressure measurement device of cost of measurement accuracy, under the cavity state that does not fill water, the device is assembled in the tunnel segment lining outside, after the slip casting, before the thick liquid does not harden, fill water in to CHR water pocket (homopolymerization chlorohydrin rubber water pocket) through the device inlet tube, make it break through the slip casting thick liquid, carry out direct contact with the soil body, the constant temperature state of holding water through the heating plate among the soil pressure detection device, utilize water pressure change reaction soil pressure change, and then reach long-term through monitoring water pressure, the purpose of accurate monitoring tunnel outside soil body pressure.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a water bag type shield tunnel outside soil pressure measuring device comprises a water bag, a sealing box hermetically connected with the end part of the water bag, a water inlet pipe and an exhaust pipe, and is characterized in that a heater used for maintaining constant water temperature in the water bag is arranged in the water bag; the water inlet pipe is used for injecting water into the water sac and comprises an outer box water inlet pipe and an inner box water inlet pipe which are connected; the exhaust pipe is used for exhausting air in the water bag and comprises an outer box exhaust pipe and an inner box exhaust pipe which are connected; a pressure liquid level transmitter for measuring the liquid level and the pressure in the water bag is fixedly connected at the junction of the sealing box and the water bag; and the data transmission line of the heater and the data transmission line of the pressure liquid level transmitter are sent out of the sealing box.
The water bag is preferably a CHR water bag.
The utility model is suitable for a shield tunnel outside soil pressure long-term monitoring, but not limited to shield tunnel owing to take above technical scheme, it has following advantage:
1. the utility model improves the punctiform stress state of the tunnel outside soil pressure measuring device into the surface stress state, enlarges the soil pressure monitoring range, passes through the grouting liquid to directly contact with the soil body, breaks through the limitation of the package of the grouting liquid, truly reflects the change of the tunnel outside soil pressure to the maximum extent, and has high measuring accuracy and small measuring error;
2. the utility model enlarges the contact area between the measuring device and the tunnel lining, is convenient to install and operate, and ensures that the device is more firmly installed;
3. the utility model discloses a parts such as outer inlet tube of box, outer exhaust pipe of box, heating plate data transmission line, pressure liquid level transmitter data transmission line are drawn forth through segment lining slip casting hole, need not to do the hole of drawing forth in addition on the section of jurisdiction, do not have the perforation phenomenon, therefore do not weaken the integrality and the leakproofness of section of jurisdiction, do not reduce the intensity and the durability of section of jurisdiction lining cutting;
4. the utility model adopts the pressure equivalent principle that water pressure reacts soil pressure, the measuring device has simple structure, low price, long service life and saved tunnel soil pressure measuring cost, and is not easy to damage;
5. the water sac of the utility model adopts CHR (homopolymerized chlorohydrin rubber) material, and has the advantages of oil resistance, water resistance, acid and alkali resistance, ozone resistance, flame resistance, atmospheric aging resistance, small air permeability, heat resistance (150 ℃), good adhesiveness and the like.
Drawings
FIG. 1 is the arrangement schematic diagram of the water bag type shield tunnel outside soil pressure measuring device of the utility model
The reference numbers in the figures illustrate: 1-CHR water bag; 3-stainless steel seal box; 18-tunnel lining construction; 19-a binder; 20-tunnel grouting holes.
FIG. 2 is the right sectional view of the water bag type shield tunnel outside soil pressure measuring device of the utility model
The reference numbers in the figures illustrate: 1-CHR water bag; 2-heating plate; 3-stainless steel seal box; 4-exhaust pipe in box; 5-a pressure liquid level transmitter; 6-water inlet pipe in box; 7-outer exhaust pipe; 8-pressure liquid level transmitter data transmission line; 9-external water inlet pipe of the box; 10-exhaust pipe threads; 11-water inlet pipe thread; 12-heater chip data transmission line; 13-exhaust pipe fixing threaded holes; 14-a pressure liquid level transmitter fixing threaded hole; 15-heating plate data transmission line hole; 16-a water inlet pipe fixing threaded hole; 17-silicon rubber seal ring.
FIG. 3 is a front sectional view of the water bag of the present invention
The reference numbers in the figures illustrate: 1-CHR water bag; 2-heating plate.
FIG. 4 is a front sectional view of the stainless steel seal box of the present invention
The reference numbers in the figures illustrate: 1-CHR water bag; 3-stainless steel seal box; 4-exhaust pipe in box; 5-a pressure liquid level transmitter; 6-water inlet pipe in box; 12-heater chip data transmission line; 17-silicon rubber seal ring.
Detailed Description
The technical solution of the present invention will be described in detail with reference to the following specific embodiments and accompanying drawings, but the scope of the present invention is not limited to the following embodiments.
As shown in fig. 2, the utility model discloses a water pocket type shield tunnel outside soil pressure measuring device, include: CHR water bag 1, heating plate 2, stainless steel seal box 3, exhaust pipe 4 in the box, pressure liquid level transmitter 5, inlet tube 6 in the box, exhaust pipe 7 outside the box, pressure liquid level transmitter data transmission line 8, inlet tube 9 outside the box, exhaust pipe screw thread 10, inlet tube screw thread 11, heating plate data transmission line 12, exhaust pipe fixed screw hole 13, pressure liquid level transmitter fixed screw hole 14, heating plate data transmission line hole 15, inlet tube fixed screw hole 16, silicon rubber seal 17 and adhesive 19.
As shown in fig. 1, the water bag type shield tunnel outer soil pressure measuring device mainly comprises a CHR water bag 1 and a stainless steel seal box 3. When the tunnel segment is assembled, the device is assembled and adhered to the outer side of the segment through the adhesive 19 under the state that water is not injected into the water sac. And the parts of the pressure liquid level transmitter data transmission line 8, the heating plate data transmission line 12, the outside box water inlet pipe 9, the outside box air outlet pipe 7 and the like are led out through the tunnel grouting hole 20. When grouting liquid is injected into the outer side of the tunnel lining and before the grouting liquid is not hardened, water is injected into the CHR water bag 1 through the water inlet pipe 9 outside the box and the water inlet pipe 6 inside the box, air in the CHR water bag 1 is discharged through the exhaust pipe 4 inside the box and the exhaust pipe 7 outside the box, after the water injection is completed, the top of the CHR water bag 1 can break through the grouting liquid and reach and contact a real soil body, and accurate equivalent replacement of soil pressure and water pressure is achieved. After the water injection of the CHR water bag 1 is completed, the water inlet pipe 9 outside the box and the air outlet pipe 7 outside the box are removed, and the air outlet pipe and the water inlet pipe are plugged by using a stainless steel threaded cover, so that the purpose of sealing is achieved. Only the pressure liquid level transmitter data transmission line 8 and the heating plate data transmission line 12 are reserved for pressure monitoring and temperature keeping, the tunnel grouting hole 20 is sealed, epoxy resin is used for detail filling, a wiring duct does not need to be arranged independently, the bearing capacity of the segment lining is not weakened, and space is saved.
The CHR water bag 1 is connected with the stainless steel sealing box 3 in a meshed mode through threads, and high-temperature vulcanized bonding silicon rubber sealing rings 17 are arranged at the front end and the rear end of each thread respectively to guarantee water tightness.
Stainless steel seal box 3 and the one side of the water direct contact in the CHR water pocket 1, stainless steel seal box 3's back promptly, take thickening steel sheet and reserve the measure of hole, the hole of reserving includes blast pipe fixed screw hole 13, pressure liquid level transmitter fixed screw hole 14, heating plate data transmission line hole 15 and inlet tube fixed screw hole 16, fixed screw hole is for fixed box interior blast pipe 4, pressure liquid level transmitter 5 and box interior inlet tube 6, and both ends set up high temperature vulcanization bonding silicon rubber sealing ring respectively around the screw, guarantee the leakproofness of water.
The change of temperature can arouse the water pressure change, consequently for accurate reflection soil pressure changes, gets rid of this interference factor of temperature variation, and the left and right sides embedding heating plate in the water pocket sets up certain temperature with the heating plate after, and the heating plate can be based on ambient temperature changes and generate heat automatically, and temperature regulation relies on self material characteristic, and life is far greater than other heaters, keeps the water in the water pocket under constant temperature for water pressure does not receive temperature variation's influence. The heating plate data transmission line 12 passes through a preformed hole of the stainless steel sealing box, namely a heating plate data transmission line hole 15, and the heating plate data transmission line is wrapped by water-swelling rubber to ensure the sealing property of the heating plate data transmission line hole 15.
The water bag type shield tunnel outer soil pressure measuring method comprises the following specific steps:
1) the outside-cartridge air outlet pipe 7 and the outside-cartridge water inlet pipe 9 are connected to the air outlet pipe thread 10 and the water inlet pipe thread 11 by threads. In the tunnel segment lining assembling stage, the whole water bag type shield tunnel outer side soil pressure measuring device is assembled and adhered to the position of the outer side pressure testing point of the tunnel lining structure 18 through an adhesive 19, and parts such as a pressure liquid level transmitter data transmission line 8, a heating plate data transmission line 12, an outer box water inlet pipe 9, an outer box air outlet pipe 7 and the like are led out through a tunnel grouting hole 20.
2) The slurry to be injected is injected outside the tunnel, and in the case where the slurry is not hardened, water is injected into the CHR water bladder 1 through the inlet pipes 9 and 6, so that air in the CHR water bladder 1 is discharged through the exhaust pipes 4 and 7. When water flows out of the exhaust pipe, the CHR water bag 1 is filled with water and no air remains, the exhaust pipe 7 outside the box is removed, and the exhaust pipe 4 inside the box is sealed at the exhaust pipe thread 10 by using a stainless steel thread cover.
3) Continuing to pass through inlet tube 9 and 6 to CHR water pocket 1 water injection, through pressure level sensor's pressure control, after the water pressure reaches demarcation water pressure in the CHR water pocket 1, stopping the water injection to remove the outer inlet tube 9 of box, use stainless steel screw thread lid in inlet tube screw thread 11 department seal box inlet tube 6, the top of CHR water pocket 1 has broken through the slip casting liquid this moment, reachd and contact true soil body, can realize the accurate equivalent replacement of soil pressure and water pressure.
4) And sealing the tunnel grouting hole 20 with the pressure liquid level transmitter data transmission line 8 and the heating plate data transmission line 12, and filling and sealing the detail part by using epoxy resin.
5) Since the heating plate 2 has the function of automatically adjusting the temperature, the heating plate is only required to be set to a specified temperature, and when the temperature of the water in the CHR water bag is lower than the specified temperature, the heating plate is triggered to automatically heat to the set temperature.
6) And setting the measurement frequency and interval time of the pressure liquid level transmitter, and measuring the pressure value and storing data when the temperature reaches a set temperature state.
Claims (2)
1. A water bag type shield tunnel outside soil pressure measuring device comprises a water bag, a sealing box hermetically connected with the end part of the water bag, a water inlet pipe and an exhaust pipe, and is characterized in that a heater used for maintaining constant water temperature in the water bag is arranged in the water bag; the water inlet pipe is used for injecting water into the water sac and comprises an outer box water inlet pipe and an inner box water inlet pipe which are connected; the exhaust pipe is used for exhausting air in the water bag and comprises an outer box exhaust pipe and an inner box exhaust pipe which are connected; a pressure liquid level transmitter for measuring the liquid level and the pressure in the water bag is fixedly connected at the junction of the sealing box and the water bag; and the data transmission line of the heater and the data transmission line of the pressure liquid level transmitter are sent out of the sealing box.
2. The measuring device of claim 1, wherein the water bladder is a CHR water bladder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921009611.7U CN210396729U (en) | 2019-07-01 | 2019-07-01 | Water bag type shield tunnel outside soil pressure measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921009611.7U CN210396729U (en) | 2019-07-01 | 2019-07-01 | Water bag type shield tunnel outside soil pressure measuring device |
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| Publication Number | Publication Date |
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| CN210396729U true CN210396729U (en) | 2020-04-24 |
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| CN201921009611.7U Active CN210396729U (en) | 2019-07-01 | 2019-07-01 | Water bag type shield tunnel outside soil pressure measuring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110374605A (en) * | 2019-07-01 | 2019-10-25 | 天津大学 | The outer lateral earth pressure measuring device of water-bag type shield tunnel and method |
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2019
- 2019-07-01 CN CN201921009611.7U patent/CN210396729U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110374605A (en) * | 2019-07-01 | 2019-10-25 | 天津大学 | The outer lateral earth pressure measuring device of water-bag type shield tunnel and method |
| CN110374605B (en) * | 2019-07-01 | 2024-03-26 | 天津大学 | Device and method for measuring soil pressure outside water bag type shield tunnel |
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