CN110849524A - Fixing device and mounting method for soil pressure box of shield tunnel - Google Patents
Fixing device and mounting method for soil pressure box of shield tunnel Download PDFInfo
- Publication number
- CN110849524A CN110849524A CN201911317257.9A CN201911317257A CN110849524A CN 110849524 A CN110849524 A CN 110849524A CN 201911317257 A CN201911317257 A CN 201911317257A CN 110849524 A CN110849524 A CN 110849524A
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- China
- Prior art keywords
- soil pressure
- pressure cell
- fixing device
- shield
- grouting
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0004—Force transducers adapted for mounting in a bore of the force receiving structure
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/08—Lining with building materials with preformed concrete slabs
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
Abstract
The invention relates to the technical field of tunnel engineering, in particular to a fixing device for a soil pressure box of a shield tunnel; the adopted technical scheme is as follows: a shield tunnel soil pressure cell fixing device comprises a soil pressure cell fixing device body and a mounting seat, wherein the mounting seat is used for mounting a soil pressure cell, a supporting rod is arranged at the bottom end of the mounting seat, a fixing base is sleeved outside the supporting rod, and the position of the fixing base in the length direction of the supporting rod is adjustable; when in use, the mounting seat is mounted in the duct piece wall back grouting body, so that the upper end of the soil pressure box is close to the tunnel surrounding rock; the fixed base is inserted in the shield pipe piece when in use and is fixedly connected with the shield pipe piece. According to the invention, after the shield segment and the segment wall post-grouting body are built, the soil pressure box fixing device can prevent the grouting from damaging the soil pressure box and prevent the grouting from influencing the accuracy of the soil pressure box measurement.
Description
Technical Field
The invention relates to the technical field of tunnel engineering, in particular to a fixing device and an installation method for a soil pressure box of a shield tunnel.
Background
The shield method tunnel construction has the advantages of high tunneling speed, good construction quality, small disturbance to surrounding rocks, no influence on ground traffic and facilities and the like, and is widely applied to tunnel engineering construction in the industries of water conservancy and hydropower, rail traffic, railways, highways and the like in recent years. Due to the complex geological conditions of tunnel engineering, the tunnel engineering is greatly influenced by fault fracture zones, underground water, surrounding rock categories and the like, and the requirement on surrounding rock deformation control is extremely high. In construction, instruments such as a soil pressure cell, a steel bar meter and a strain gauge are generally adopted to measure parameters such as stress strain of tunnel surrounding rock so as to evaluate the deformation tendency, degree and stability of the tunnel surrounding rock.
At present, the shield tunnel soil pressure cell fixing device is implemented as follows: the top of the soil pressure box fixing device is flushed with the outer side wall of a prefabricated shield segment, then the soil pressure box fixing device is connected with the shield segment in a steel bar welding mode, the top of the soil pressure box fixing device is temporarily plugged, and finally the shield segment is poured in a shield segment template. The following problems mainly exist in the fixing and mounting mode: firstly, the soil pressure box arranged in the shield segment is easy to fall off and even damage; secondly, the soil pressure cell is not in direct contact with the tunnel surrounding rock, but is in indirect contact with the tunnel surrounding rock through the duct piece wall back grouting body, so that the measurement data error is large; when the shield segment is incompletely filled by grouting behind the wall, the grouting body is unevenly contacted with the soil pressure cell or the pea gravel is in point-surface contact with the measuring surface of the soil pressure cell, so that the error of the measured data is further increased; thirdly, the grouting pressure behind the shield segment wall is higher, and the soil pressure box is easily damaged in the grouting process; fourthly, the soil pressure cell fixing device, the shield segment and the hardened grouting body are easily integrated after the grouting slurry is hardened, so that the soil pressure cell does not have the function of measuring the soil pressure any more.
Disclosure of Invention
Aiming at the technical problems that the existing shield tunnel soil pressure cell is easy to fall off and damage, has large measurement error and is easy to lose efficacy; the invention provides a fixing device for a soil pressure box of a shield tunnel, which ensures that the soil pressure box is firmly and reliably installed, can prevent the shield duct piece wall back grouting from influencing the measurement result of the pressure box or damaging the pressure box, and ensures that the measured data of the pressure box is reliable and accurate.
The invention is realized by the following technical scheme:
a shield tunnel soil pressure cell fixing device comprises a soil pressure cell fixing device body and a mounting seat, wherein the mounting seat is used for mounting a soil pressure cell, a supporting rod is arranged at the bottom end of the mounting seat, a fixing base is sleeved outside the supporting rod, and the position of the fixing base in the length direction of the supporting rod is adjustable; when in use, the mounting seat is mounted in the duct piece wall back grouting body, so that the upper end of the soil pressure box is close to the tunnel surrounding rock; the fixed base is inserted in the shield pipe piece when in use and is fixedly connected with the shield pipe piece.
After the construction of the shield segment and the segment wall post-grouting body is finished, the soil pressure cell is fixed through the soil pressure cell fixing device body; the fixing base of the fixing device is fixedly connected with the shield segment, and the position of the fixing base in the length direction of the lower end supporting rod of the mounting seat is adjustable, so that the soil pressure box is in direct contact with the tunnel surrounding rock according to the set initial pressure. The damage of the grouting to the soil pressure cell can be avoided, and the influence of the grouting on the accuracy of the soil pressure cell measurement is avoided. Therefore, the error of the measuring result of the soil pressure cell is small, and the monitoring result can accurately reflect the soil pressure of the surrounding rock of the tunnel.
Furthermore, the fixed base penetrates through and is provided with a grouting hole, and the grouting hole is used for grouting a space between the fixed base and the mounting seat. The concrete is poured through the grouting holes, gaps among the body of the complete filling soil pressure cell fixing device, the shield segment and the segment back grouting body are formed, the mounting hole grouting body tightly bonded with the shield segment and the segment back grouting body is formed, and the completeness of the shield segment and the segment wall back grouting body is ensured.
Furthermore, the bottom end of the mounting seat is also fixedly provided with a grout stopping ring, and the grout stopping ring is used for preventing grout from entering the mounting seat so as to protect the soil pressure cell.
Preferably, the support rod is a screw rod, the fixed base is provided with a through hole, and the support rod is arranged in the through hole in a penetrating mode. The position of the fixed base is adjusted through the screw rod, so that the position of the fixed base is simple and convenient to adjust, and the adjusting linearity is good.
As a specific embodiment of the fixed base position adjustment: the supporting rod part is sleeved with an inner nut and an outer nut, and the inner nut and the outer nut are used for adjusting the position of the fixing base in the length direction of the supporting rod. The shield pipe is characterized by further comprising a mounting sleeve, wherein the mounting sleeve is inserted into the shield pipe piece when in use and is fixedly connected with the shield pipe piece; the mounting sleeve is a threaded pipe, the outer side wall of the fixing base is provided with an external thread matched with the mounting sleeve, and the mounting sleeve is in threaded connection with the fixing base when in use.
Preferably, the bottom of the fixed base is further fixed with a mounting nut, the mounting nut and the through hole are concentrically arranged, and the small diameter of the mounting nut is larger than the outer diameter of the outer nut, so that the position of the fixed base can be conveniently adjusted.
Furthermore, the mounting seat is in the shape of an inwards concave disc, a rubber ring is fixed in the mounting seat, and the rubber ring is used for fixing the soil pressure cell. The soil pressure cell is fixed through the rubber ring, and the position of the soil pressure cell in the mounting seat can be changed while the soil pressure cell is fixed, so that the soil pressure cell is protected.
Preferably, the supporting rod is a hollow rod piece, the bottom of the mounting seat is provided with a threading hole, and the threading hole is communicated with the cavity of the supporting rod; the mounting seat bottom is equipped with the threading groove, threading groove and through wires hole intercommunication, bracing piece cavity, through wires hole, threading groove are used for laying the cable of soil pressure cell. The cable of the soil pressure cell can be directly penetrated out through the support rod, the cable can be protected, and other structures do not need to be additionally arranged to penetrate out of the cable.
The invention also provides an installation method of the shield tunnel soil pressure box fixing device, which comprises the following steps:
assembling the soil pressure box fixing device body, and fixing the soil pressure box on the soil pressure box fixing device body;
fixedly connecting the mounting sleeve with the steel bars in the shield segment, plugging two ends of the mounting sleeve, and then pouring the shield segment in the shield segment template;
mounting a shield segment, and grouting a gap between the shield segment and surrounding rocks of the tunnel to form a segment wall post-grouting body;
taking out the end plug in the installation sleeve, drilling an installation channel in the duct piece wall back grouting body through the installation sleeve, drilling the installation channel to tunnel surrounding rocks, and grinding the tunnel surrounding rocks at the tail end of the installation channel to be flat;
installing a soil pressure cell fixing device body in an installation channel, connecting a cable of a soil pressure cell with a reading instrument, judging whether the soil pressure cell is completely contacted with tunnel surrounding rock or not by observing data change of the reading instrument, and then fixedly connecting a fixing base with an installation sleeve;
and grouting the installation sleeve and the installation channel to finish the fixed installation of the soil pressure cell.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. a fixing base is sleeved outside the supporting rod at the bottom end of the mounting seat, and the position of the fixing base in the length direction of the supporting rod is adjustable; when in use, the mounting seat is mounted in the duct piece wall back grouting body, so that the upper end of the soil pressure box is close to the tunnel surrounding rock; the fixed base is inserted in the shield pipe piece when in use and is fixedly connected with the shield pipe piece. After the shield segment and the segment wall post-grouting body are built, the soil pressure box is fixed through the soil pressure box fixing device body, the fixing base of the fixing device body is fixedly connected with the shield segment, and the position of the fixing base in the length direction of the support rod at the lower end of the mounting base is adjustable, so that the soil pressure box is directly contacted with the tunnel surrounding rock according to the set initial pressure. The damage of the grouting to the soil pressure cell can be avoided, and the influence of the grouting on the accuracy of the soil pressure cell measurement is avoided. Therefore, the error of the measuring result of the soil pressure cell is small, and the monitoring result can accurately reflect the soil pressure of the surrounding rock of the tunnel.
2. The grout stopping ring can prevent the grout poured after the installation of the device from overflowing to the positions of the soil pressure cell and the tunnel surrounding rock and influencing the measuring effect of the soil pressure cell.
3. The device is provided with threading groove and through wires hole, can directly wear out the cable through the bracing piece, need not increase other structures again and wears out the cable.
4. The device is fixed in the installation sleeve through the fixed base, has enough operation space and is simple and convenient to install.
5. After the device is installed, concrete is poured into the installation sleeve and the installation channel through the grouting holes, gaps are completely filled, and installation hole grouting bodies tightly bonded with the installation sleeve and the installation channel are formed. The integrality of the shield segment and the segment wall post-grouting body is repaired.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic structural view of a soil pressure cell retaining apparatus according to the present invention;
FIG. 2 is a schematic top view of the earth pressure cell securing device of the present invention;
fig. 3 is a schematic view illustrating the installation of the soil pressure cell fixing device of the present invention.
Reference numbers and corresponding part names in the drawings:
1-soil pressure cell fixing device body, 2-shield segment, 3-segment wall post-grouting body, 4-tunnel surrounding rock, 5-mounting hole grouting body, 6-mounting seat, 7-threading hole, 8-threading groove, 9-rubber ring, 10-step, 11-fixing ring, 12-grout-stopping ring, 13-supporting rod, 14-fixing base, 15-internal nut, 16-mounting nut, 17-grout-stopping pad, 18-grouting hole, 19-external nut, 20-through hole, 21-soil pressure cell, 22-cable, 23-mounting sleeve and 24-mounting channel.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Examples
The utility model provides a shield tunnel soil pressure cell fixing device, includes soil pressure cell fixing device body 1, mount pad 6 is used for installing soil pressure cell 21. The soil pressure cell 21 is a pressure sensor for measuring soil pressure, and is typically a string type or ink cartridge type sensor, and has a generally circular outer shape, and in the embodiment, the mounting seat 6 is formed in a disk shape. A supporting rod 13 is arranged at the bottom end of the mounting seat 6, a fixing base 14 is sleeved outside the supporting rod 13, and the position of the fixing base 14 in the length direction of the supporting rod 13 is adjustable; the fixed base 14 can be in threaded connection with the support rod 13, pin connection and the like, so that the position of the fixed base 14 in the length direction of the support rod 13 can be adjusted. When in use, the mounting seat 6 is mounted in the duct piece wall back grouting body 3, so that the upper end of the soil pressure box 21 is abutted against the tunnel surrounding rock 4; when in use, the fixed base 14 is inserted into the shield segment 2 and is fixedly connected with the shield segment 2.
It should be noted that the shield segment 2 is a main assembly member for shield construction, is the innermost barrier of the tunnel, and plays a role in resisting soil layer pressure, underground water pressure and some special loads; a closed circular ring in the tunnel is generally spliced by a plurality of shield segments 2. After the shield segments 2 are assembled, gaps exist between the outer sides of the shield segments 2 and a soil body, and the gaps need to be filled by segment wall post-grouting to prevent the shield segments 2 and the soil body from sinking and the like; the slurry is solidified and cured to form a complete slurry body, which is referred to as a segment wall post-grouting body 3 in this embodiment.
In the embodiment, after the shield segment 2 and the segment wall back grouting body 3 are built, the soil pressure cell 21 is fixed through the soil pressure cell fixing device body 1; the fixing base 14 of the fixing device body is fixedly connected with the shield segment 2, and the position of the fixing base 14 in the length direction of the lower end support rod 13 of the mounting seat 6 is adjustable, so that the soil pressure box 21 is directly contacted with the tunnel surrounding rock 4 according to set initial pressure. The damage of the grouting on the soil pressure cell 21 can be avoided, and the influence of the grouting on the accuracy of the measurement of the soil pressure cell 21 can be avoided. Therefore, the error of the measurement result of the soil pressure cell 21 is small, and the monitoring result can accurately reflect the soil pressure of the surrounding rock of the tunnel.
Further, the fixed base 14 is provided with a grouting hole 18 in a penetrating manner, and the grouting hole 18 is used for grouting a space between the fixed base 14 and the mounting seat 6. Through the grout hole 18 pouring concrete, the space between the complete filling soil pressure cell fixing device body 1 and the shield section of jurisdiction 2, the section of jurisdiction grouting body 3 behind one's back forms the mounting hole grouting body 5 that closely bonds with shield section of jurisdiction 2, the section of jurisdiction grouting body 3 behind one's back, has ensured the integrality of shield section of jurisdiction 2 and section of jurisdiction wall post-grouting body 3, the structural strength and the stability in guarantee tunnel.
Further, a grout stopping ring 12 is fixed at the bottom end of the mounting seat 6, and the grout stopping ring 12 is used for preventing grout from entering the mounting seat 6, so that the soil pressure cell 21 is protected, and the accuracy of the measurement result of the soil pressure cell 21 is ensured. In this embodiment, the following fixing is performed: a step 10 is arranged at the bottom of the mounting seat 6, a threaded hole is formed in the middle of the step 10, and a grout stopping ring 12 is sleeved outside the step 10; then, the fixing ring 11 is screwed to the bottom end of the step 10 to fix the slurry stop ring 12, and it is understood that the outer diameter of the fixing ring 11 is smaller than the outer diameter of the slurry stop ring 12, and the inner diameter of the fixing ring 11 is larger than the inner diameter of the slurry stop ring 12.
In order to ensure the reliability of the grout stopping ring 12 and reduce the resistance when the soil pressure box fixing device body 1 is installed, the section of the grout stopping ring 12 is in a hollow conical shape, two ends of the grout stopping ring are horizontal planes, and the outer diameter of the lower part of the grout stopping ring is larger than that of the upper part of the grout stopping ring. The slurry stop ring 12 is generally made of rubber material, such as ethylene propylene diene monomer, polytetrafluoroethylene, etc.
Preferably, the support rod 13 is a screw, the fixing base 14 is provided with a through hole 20, it can be understood that the through hole 20 and the fixing base 14 are concentrically arranged, and the support rod 13 is inserted into the through hole 20. The position of the fixed base 14 is adjusted through the screw rod, so that the position of the fixed base 14 is adjusted simply and conveniently, and the adjustment linearity is good.
As a specific embodiment of the position adjustment of the fixed base 14: an inner nut 15 and an outer nut 19 are sleeved on the rod part of the supporting rod 13, and the inner nut 15 and the outer nut 19 are used for adjusting the position of the fixing base 14 in the length direction of the supporting rod 13. Specifically, the inner nut 15 is used to limit the position of the fixed base 14 to the mount 6, and the outer nut 19 is used to fix the solid base 14.
Further, still include installation sleeve 23, install in shield segment 2 during the installation sleeve 23 uses, and with shield segment 2 fixed connection, soil pressure cell fixing device body 1 is fixed through installation sleeve 23 promptly. Specifically, the mounting sleeve 23 is a threaded pipe, the outer side wall of the fixing base 14 is provided with an external thread adapted to the mounting sleeve 23, and the mounting sleeve 23 is screwed with the fixing base 14 in use.
Preferably, the bottom of the fixed base 14 is further fixed with a mounting nut 16, the mounting nut 16 is concentrically arranged with the through hole 20, and the small diameter of the mounting nut 16 is larger than the outer diameter of the outer nut 19, so that the position of the fixed base 14 can be conveniently adjusted.
Further, the mounting seat 6 is in the shape of a concave disc, a rubber ring 9 is fixed in the mounting seat 6, and the rubber ring 9 is used for fixing the soil pressure cell 21. The soil pressure cell 21 is fixed through the rubber ring 9, and the position of the soil pressure cell 21 in the mounting seat 6 can be changed while the soil pressure cell 21 is fixed, so that the soil pressure cell 21 is protected.
Preferably, the supporting rod 13 is a hollow rod, the bottom of the mounting seat 6 is provided with a threading hole 7, and the threading hole 7 is communicated with a cavity of the supporting rod 13; the bottom of the mounting seat 6 is provided with a threading groove 8, the threading groove 8 is communicated with the threading hole 7, and the cavity of the support rod 13, the threading hole 7 and the threading groove 8 are used for laying a cable 22 of the soil pressure cell 21. The cable 22 of the soil pressure cell 21 can be directly penetrated out through the support rod 13, the cable can be protected, and other structures are not required to be additionally arranged to penetrate out of the cable 22.
In order to prevent the rubber ring 9 from extruding the cable 22 of the soil pressure cell 21 to damage the cable 22, the rubber ring 9 is a C-shaped rubber ring; or a groove is arranged on the rubber ring 9, and the groove or the notch is aligned to the threading groove 8 when in use.
The installation method of the embodiment comprises the following steps:
1. the equipment soil pressure cell fixing device body 1 to fix soil pressure cell on soil pressure cell fixing device body 1:
the cable 22 of the soil pressure cell 21 is led into the cavity of the support rod 21 from the threading groove 8 and the threading hole 7 and penetrates out;
placing the soil pressure cell 21 into the mounting seat 6, placing the rubber ring 9 into a gap between the soil pressure cell 21 and the inner side wall of the mounting seat 6, and fixing the soil pressure cell 21;
sleeving the grout stopping ring 12 outside the step 10, and then screwing the fixing ring 11 and the step 10 to fix the grout stopping ring 12;
the inner nut 15 is screwed into any position of the support rod 13, the fixing base 14 is sleeved outside the support rod 13 through the through hole 20, the grout stop pad 17 is sleeved outside the support rod 13, and the outer nut 19 is screwed into the support rod 13, namely the fixing base 14 and the grout stop pad 19 are positioned between the inner nut 15 and the outer nut 19.
2. And fixedly connecting the mounting sleeve 23 with the steel bars in the shield segment 2, plugging two ends of the mounting sleeve 23 by using end plugs, and pouring the shield segment 2 in the shield segment 2 template.
3. Installing a shield segment 2: after the shield machine tunnels to a monitoring section, the shield segment 2 is installed to form a shield pipe, and then grouting is performed on a gap between the shield segment 2 and the tunnel surrounding rock 4 to form a segment wall post-grouting body 3.
4. Drilling the installation passage 24:
after the segment wall post-grouting body 3 is finally set, taking out the end plug in the installation sleeve 23;
installing a small-sized drilling machine, drilling an installation channel 24 in the segment wall back grouting body 3 by using the installation sleeve 23 until reaching the tunnel surrounding rock 4, namely drilling the installation channel 24 in the segment wall back grouting body 3 through the installation sleeve 23;
the installation channel 24 is drilled to the tunnel surrounding rock 4, and the diameter of the installation channel 24 is larger than the outer diameter of the fixing ring 11 and smaller than the outer diameter of the grout stopping ring 12;
after the installation channel 24 is drilled, the tunnel surrounding rock 4 at the tail end of the installation channel 24 is ground flat by using a hole bottom grinding flat drill bit;
and cleaning the installation channel 24, the installation sleeve 23 and the tunnel surrounding rock at the tail end of the installation channel 24.
5. The fixed soil pressure cell fixing device body of installation 1:
installing the soil pressure cell fixing device body 1 in the installation channel 24, connecting the cable 22 of the soil pressure cell 21 with a reading instrument, and judging whether the soil pressure cell 21 is completely contacted with the tunnel surrounding rock 4 or not by observing data change of the reading instrument;
the fixed base 14 is then fixedly connected to the mounting sleeve 23.
6. Concrete is poured into the mounting sleeve 23 and the mounting channel 24 from the grouting hole 18, gaps are completely filled, mounting hole grouting 5 tightly bonded with the soil pressure cell fixing device body 1, the mounting sleeve 23 and the mounting channel 24 is formed, and fixing and mounting of the soil pressure cell 21 are completed.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The utility model provides a shield tunnel soil pressure cell fixing device, includes soil pressure cell fixing device body (1), mount pad (6) are used for installing soil pressure cell (21), its characterized in that: a supporting rod (13) is arranged at the bottom end of the mounting seat (6), a fixing base (14) is sleeved outside the supporting rod (13), and the position of the fixing base (14) in the length direction of the supporting rod (13) is adjustable;
when in use, the mounting seat (6) is mounted in the duct piece wall back grouting body so that the upper end of the soil pressure box (21) abuts against the tunnel surrounding rock;
the fixed base (14) is inserted into the shield segment (2) when in use and is fixedly connected with the shield segment (2).
2. The shield tunnel earth pressure cell fixing device of claim 1, characterized in that: the fixed base (14) penetrates through a grouting hole (18), and the grouting hole (18) is used for grouting a space between the fixed base (14) and the mounting seat (6).
3. The shield tunnel earth pressure cell fixing device of claim 2, characterized in that: the bottom end of the mounting seat (6) is further fixed with a grout stopping ring (12), and the grout stopping ring (12) is used for preventing grout from entering the mounting seat (6).
4. The shield tunnel earth pressure cell fixing device of claim 1, characterized in that: the supporting rod (13) is a screw rod, the fixing base (14) is provided with a through hole (20), and the supporting rod (13) penetrates through the through hole (20);
an inner nut (15) and an outer nut (19) are sleeved on the rod part of the supporting rod (13), and the inner nut (15) and the outer nut (19) are used for adjusting the position of the fixing base (14) in the length direction of the supporting rod (13).
5. The shield tunnel earth pressure cell fixing device of claim 4, characterized in that: the shield tunnel is characterized by further comprising a mounting sleeve (23), wherein the mounting sleeve (23) is inserted into the shield segment (2) when in use and is fixedly connected with the shield segment (2);
the mounting sleeve (23) is a threaded pipe, the outer side wall of the fixing base (14) is provided with an external thread matched with the mounting sleeve (23), and the mounting sleeve (23) is in threaded connection with the fixing base (14) when in use.
6. The shield tunnel earth pressure cell fixing device of claim 5, characterized in that: the bottom of the fixed base (14) is further fixed with a mounting nut (16), the mounting nut (16) and the through hole (20) are concentrically arranged, and the small diameter of the mounting nut (16) is larger than the outer diameter of the outer nut (19).
7. The shield tunnel earth pressure cell fixing device of claim 1, characterized in that: the mounting seat (6) is in a concave disc shape, a rubber ring (9) is fixed in the mounting seat (6), and the rubber ring (9) is used for fixing the soil pressure cell (21).
8. The shield tunnel earth pressure cell fixing device of claim 1, characterized in that: the supporting rod (13) is a hollow rod piece, a threading hole (7) is formed in the bottom of the mounting seat (6), and the threading hole (7) is communicated with a cavity of the supporting rod (13); the soil pressure cell is characterized in that a penetrating groove (8) is formed in the bottom of the mounting seat (6), the penetrating groove (8) is communicated with the penetrating hole (7), and the supporting rod (13) is provided with a cavity, the penetrating hole (7) and the penetrating groove (8) and is used for arranging a cable (22) of the soil pressure cell (21).
9. A method for installing a shield tunnel soil pressure cell, comprising the shield tunnel soil pressure cell fixing device of any one of claims 1 to 8, the method comprising the steps of:
assembling the soil pressure box fixing device body, and fixing the soil pressure box on the soil pressure box fixing device body;
fixedly connecting the mounting sleeve with the steel bars in the shield segment, plugging two ends of the mounting sleeve, and then pouring the shield segment in the shield segment template;
mounting a shield segment, and grouting a gap between the shield segment and surrounding rocks of the tunnel to form a segment wall post-grouting body;
taking out the end plug in the installation sleeve, drilling an installation channel in the duct piece wall back grouting body through the installation sleeve, and drilling the installation channel to tunnel surrounding rocks;
installing the soil pressure box fixing device body in the installation channel and fixedly connecting the soil pressure box fixing device body with the installation sleeve;
and grouting the installation sleeve and the installation channel to finish the fixed installation of the soil pressure cell.
10. The method for installing the soil pressure cell of the shield tunnel according to claim 9, wherein when the soil pressure cell fixing device is installed, a cable of the soil pressure cell is connected with a reading instrument, and whether the soil pressure cell is completely contacted with the surrounding rock of the tunnel is judged by observing data change of the reading instrument.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911317257.9A CN110849524A (en) | 2019-12-19 | 2019-12-19 | Fixing device and mounting method for soil pressure box of shield tunnel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911317257.9A CN110849524A (en) | 2019-12-19 | 2019-12-19 | Fixing device and mounting method for soil pressure box of shield tunnel |
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| CN110849524A true CN110849524A (en) | 2020-02-28 |
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| CN201911317257.9A Pending CN110849524A (en) | 2019-12-19 | 2019-12-19 | Fixing device and mounting method for soil pressure box of shield tunnel |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111912549A (en) * | 2020-08-06 | 2020-11-10 | 盾构及掘进技术国家重点实验室 | Soil pressure sensor fixing device and fixing method |
| CN112302062A (en) * | 2020-10-09 | 2021-02-02 | 河海大学 | Assembly type high-precision steel support shaft force meter erection protection device and implementation method thereof |
| CN113586038A (en) * | 2021-07-13 | 2021-11-02 | 大连地铁集团有限公司 | Method for installing soil pressure gauge in duct piece prefabricating process |
| CN113686474A (en) * | 2021-07-21 | 2021-11-23 | 河南省交通规划设计研究院股份有限公司 | Multifunctional heat-insulating soil pressure box fixing device and using method thereof |
| CN114235034A (en) * | 2021-11-29 | 2022-03-25 | 山东大学 | Tunnel surrounding rock stress and steel arch frame strain integrated measurement auxiliary device and method |
| CN115824471A (en) * | 2022-11-15 | 2023-03-21 | 中铁三局集团第四工程有限公司 | Bidirectional stress monitoring device and monitoring method for shield segment |
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2019
- 2019-12-19 CN CN201911317257.9A patent/CN110849524A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111912549A (en) * | 2020-08-06 | 2020-11-10 | 盾构及掘进技术国家重点实验室 | Soil pressure sensor fixing device and fixing method |
| CN112302062A (en) * | 2020-10-09 | 2021-02-02 | 河海大学 | Assembly type high-precision steel support shaft force meter erection protection device and implementation method thereof |
| CN113586038A (en) * | 2021-07-13 | 2021-11-02 | 大连地铁集团有限公司 | Method for installing soil pressure gauge in duct piece prefabricating process |
| CN113586038B (en) * | 2021-07-13 | 2024-03-22 | 大连地铁集团有限公司 | Method for installing soil pressure gauge in duct piece prefabrication process |
| CN113686474A (en) * | 2021-07-21 | 2021-11-23 | 河南省交通规划设计研究院股份有限公司 | Multifunctional heat-insulating soil pressure box fixing device and using method thereof |
| CN114235034A (en) * | 2021-11-29 | 2022-03-25 | 山东大学 | Tunnel surrounding rock stress and steel arch frame strain integrated measurement auxiliary device and method |
| CN115824471A (en) * | 2022-11-15 | 2023-03-21 | 中铁三局集团第四工程有限公司 | Bidirectional stress monitoring device and monitoring method for shield segment |
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