CN116519444A - Model test shield segment capable of realizing water and soil pressure monitoring - Google Patents
Model test shield segment capable of realizing water and soil pressure monitoring Download PDFInfo
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- CN116519444A CN116519444A CN202310440728.5A CN202310440728A CN116519444A CN 116519444 A CN116519444 A CN 116519444A CN 202310440728 A CN202310440728 A CN 202310440728A CN 116519444 A CN116519444 A CN 116519444A
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- soil pressure
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- pressure monitoring
- component
- model test
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- 239000002689 soil Substances 0.000 title claims abstract description 93
- 238000012544 monitoring process Methods 0.000 title claims abstract description 84
- 238000012360 testing method Methods 0.000 title claims abstract description 53
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 50
- 238000007789 sealing Methods 0.000 claims abstract description 47
- 238000000034 method Methods 0.000 claims abstract description 13
- 238000009434 installation Methods 0.000 claims description 35
- 229910000831 Steel Inorganic materials 0.000 claims description 20
- 239000010959 steel Substances 0.000 claims description 20
- 230000005540 biological transmission Effects 0.000 claims description 13
- 230000003014 reinforcing effect Effects 0.000 claims description 8
- 238000013461 design Methods 0.000 claims description 7
- 239000011435 rock Substances 0.000 abstract description 20
- 230000008569 process Effects 0.000 abstract description 11
- 238000011161 development Methods 0.000 abstract description 2
- 230000007246 mechanism Effects 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 11
- 238000004088 simulation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000011900 installation process Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000007569 slipcasting Methods 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
Classifications
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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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- 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
- G01L5/0028—Force sensors associated with force applying means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
- G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
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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
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0032—Generation of the force using mechanical means
- G01N2203/0033—Weight
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0075—Strain-stress relations or elastic constants
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0236—Other environments
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Abstract
The invention discloses a model test shield segment capable of realizing water and soil pressure monitoring and sensor replacement functions, which comprises a segment component, a water pressure monitoring component, a soil pressure monitoring component, a mounting component, a sealing component which are sequentially connected, wherein the segment component, the water pressure monitoring component, the soil pressure monitoring component, the mounting component, the sealing component and the like are arranged through mechanisms such as a segment preset grouting hole, a splicing panel, a sealing groove and the like, so that the segment splicing of a shield tunnel can be truly simulated in a model test, the segment sealing is realized, the tail grouting process after splicing is realized, the water and soil pressure monitoring component is buried in a model test shield segment support in a circumferential manner, the monitoring of water and soil pressure around the segment is realized, the mounting device is connected with a segment structure, the mounting device is mounted together with the monitoring component after the shield segment splicing is completed, the mounting component is convenient to detach and replace, and the water and soil pressure monitoring component can be used normally, and the distribution rule of water pressure around the segment, the stress deformation rule of surrounding rock and the surrounding rock pressure development process are reflected relatively accurately.
Description
Technical Field
The invention belongs to the technical field of underground engineering construction model tests, and particularly relates to a model test shield segment capable of realizing water and soil pressure monitoring, in particular to a segment structure capable of realizing water and soil pressure monitoring and sensor replacement functions.
Background
In the process of a shield method construction model test, a shield segment of a newly built tunnel is a very important key component. Relevant tests on deformation and stress are selected according to research requirements in the test process, wherein the surrounding rock pressure and the surrounding rock surrounding water pressure are one of important monitoring content. By monitoring the implementation of engineering through surrounding rock pressure, water pressure around eyes and the like and combining means such as numerical simulation analysis and the like, the tunnel design and construction scheme progress optimization under similar engineering conditions can be realized, including the selection of excavation modes, the selection of supporting structures, the selection of strength and the like, and the further optimization of the design and construction organization scheme is facilitated, so that the economy of tunnel construction investment, the reliability of design and the safety of construction are ensured.
At present, surrounding rock pressure monitoring is mainly carried out by means of an osmometer and a soil pressure box which are pre-fixed on the outer surface of a prefabricated segment in the tunnel surrounding water and soil pressure monitoring process of a shield construction model test. The monitoring means has the defect that the error of measured data is large because the soil pressure box cannot be contacted with surrounding soil in the installation process; the damage condition of the osmometer and the soil pressure box is easy to be caused in the process of installation and grouting; aging of the sensor with time. When the sensor on the duct piece is found that data cannot be accurately measured after being installed, the sensor cannot be conveniently checked and replaced.
Therefore, it is necessary to design a shield segment for model test, which is convenient to install, easy to overhaul and replace, and capable of monitoring the surrounding water and soil pressure of the shield segment, so as to meet the requirements of the underground engineering shield construction model test.
Disclosure of Invention
In view of the above, the invention provides a model test shield segment capable of realizing water and soil pressure monitoring and sensor replacement functions.
The invention adopts the following technical scheme:
the structure mainly comprises a duct piece, a water pressure and surrounding rock pressure monitoring component (an osmometer, a soil pressure box and a mounting device), a sealing component and the like. Considering the characteristics of a shield construction method and a model test comprehensively, each annular pipe piece of the pipe piece assembly is split into four splicing blocks which are respectively a sealing block, a connecting block A, a connecting block B and a standard block, the four splicing blocks are spliced to form an annular pipe piece, the tunnel axial direction is taken as the longitudinal direction, the tunnel radial direction is taken as the transverse direction, the edges of the two transverse ends of the standard block are long straight edges which are parallel in a I shape together, the two long straight edges with equal length are distributed on the two sides of the longitudinal central axis of the standard block, and the edges of the two longitudinal ends are arc-shaped of the shield tunnel. The connecting block A is in a shape that one end of the connecting block A is in a transverse direction and is parallel to a longitudinal long straight edge, the other end of the connecting block A is oblique to the longitudinal long oblique edge, edges at two transverse ends are two long straight edges and long oblique edges which are in an I/I shape together, edges at two longitudinal ends are arc-shaped of a shield tunnel, one end of the connecting block B is in a transverse direction and is parallel to the longitudinal long straight edge, the other end of the connecting block B is oblique to the longitudinal long oblique edge, edges at two transverse ends are two long straight edges and long oblique edges which are in an I/O shape together, and edges at two longitudinal ends are arc-shaped of the shield tunnel. The shape of the top sealing block is that the edges at the two transverse ends are long oblique sides which are parallel in an eight shape, the two long oblique sides with equal length are distributed at the two sides of the longitudinal central axis of the top sealing block, and the edges at the two longitudinal ends are arc-shaped of the shield tunnel.
Preferably, the contact surface that the different section of jurisdiction pieces of each ring section of jurisdiction are connected all sets up the concatenation panel, reserve the screw hole site on the concatenation panel, the contact surface that the different ring section of jurisdiction piece of longitudinal direction is connected all sets up the concatenation panel, reserve the screw hole site on the concatenation panel, when each ring section of jurisdiction splice installation, the standard piece is placed in tunnel section below, connecting block A and connecting block B place in standard piece both sides respectively, and splice with horizontal vertically edge and standard piece, the block of capping is settled directly over the tunnel section at last, and splice with two long hypotenuses in connecting block A and connecting block B respectively and install, the concatenation panel structure can be convenient carry out the assembly between the ring direction section of jurisdiction piece and between the different ring section of longitudinal direction, the assembly process is unanimous with in the actual engineering, can simulate shield section of jurisdiction concatenation process truly.
Preferably, in order to truly simulate the working state of sealing and water-impermeable after the segment splicing of the shield tunnel in the model test is completed, the embodiment of the invention provides a shield segment sealing structure for the model test, wherein a rubber sealing strip mounting groove is reserved on a circumferential splicing panel connected with the circumferential segment, the mounting groove is positioned at the outer side of the circumferential splicing panel, a rubber sealing strip mounting groove is reserved on a longitudinal splicing panel connected with different longitudinal annular segments, the mounting groove is positioned at the outer side of the longitudinal splicing panel, a rubber sealing groove is pre-adhered before segment splicing, and a screw is fastened during segment splicing, so that sealing strips are closely adhered to achieve the sealing effect.
Preferably, in order to realize the grouting reinforcement process after the splicing of the shield tunnel segment is truly simulated in the model test, the embodiment of the invention provides a shield segment grouting structure for the model test, three reinforcing ribs are additionally arranged in a segment block, the middle part of each reinforcing rib is thickened, grouting holes, water pressure and soil pressure sensor monitoring hole sites are reserved at the thickened parts of the middle parts of the reinforcing ribs, and the hole sites are simultaneously used as mounting supports of a water pressure and surrounding rock pressure monitoring assembly and a mounting device. Different ring segments consider the staggered joint installation construction requirement in advance when prefabricating, and the reserved grouting holes are guaranteed to be right above the assembled segments.
Further, in order to realize the monitoring to surrounding water pressure and surrounding rock pressure in the model test, the embodiment of the invention provides a shield segment water pressure and surrounding rock pressure monitoring component for the model test, which comprises a osmometer, a strain type soil pressure box and a mounting device, wherein the osmometer permeable rock face is buried in a circular steel cylinder of a support seat so as to measure water pressure values, the loading face end of the strain type soil pressure box extends out of the shield segment and is abutted with an outer soil layer so as to measure soil pressure values, the osmometer and the soil pressure box are fixed through the mounting device, the positions of the osmometer and the soil pressure box in the mounting device can be finely adjusted while the arrangement of the osmometer and the soil pressure box is fixed, two reinforcing ribs are respectively selected from standard blocks, a connecting block A, a connecting block B and a sealing block segment block in order to reserve water, the soil pressure sensor to monitor hole positions of the water pressure and surrounding rock pressure monitoring component, the structure can realize the arrangement of the water pressure and segment pressure component in the surrounding rock pressure monitoring ring, the surrounding rock pressure monitoring ring can be mounted in a circle, the water pressure monitoring ring can be mounted in a direction of the surrounding rock pressure monitoring ring and the surrounding rock pressure monitoring ring can be mounted in a manner, and the installation of the surrounding rock pressure monitoring component can be conveniently mounted on the surrounding rock pressure monitoring ring is required.
Further, in order to realize convenient installation of the monitoring component and sealing of the monitoring position, the embodiment of the invention provides a device for installing a shield segment water and soil pressure sensor monitoring device for a model test, which comprises two circular steel cylinders with upper parts without upper covers, a base connected with a segment is arranged at the lower parts, sensor cable holes are reserved in the middle parts of the two steel cylinders, and bolt installation holes connected with the segment are reserved on the base. The inner diameters of the two circular steel cylinders are 2-3 mm larger than the diameters of the osmometer and the soil pressure box respectively, the lengths of the circular steel cylinders are equal to the depth of the reserved holes of the shield segments for the model, so that the sealing of the sensor holes is realized, the mounting device is sealed by arranging a support sealing gasket when being connected with the segments, and the mounting device is tightly connected with the mounting support on the segments through screws, so that the sealing purpose is achieved.
Preferably, the installation device comprises two hollow round steel cylinders, two threading holes are respectively formed in the bottom of the installation device, the threading holes are respectively used for laying cables of the osmometer and the soil pressure box, the cables of the osmometer and the soil pressure box can be respectively threaded out through the installation device, the cables can be protected, and other structures do not need to be additionally arranged to thread out the cables. The installation device can be conveniently and rapidly detached together with the monitoring component, and the sensor can be conveniently replaced in the test process.
Preferably, in order to realize the installation process of the monitoring component when monitoring the water pressure around the pipe piece and the surrounding rock pressure in the model test, the connection screw hole sites are preset around the middle water and soil pressure sensor monitoring hole sites of the reinforcing ribs inside the pipe piece, so that the osmometer, the soil pressure box and the installation device are installed. The installation device is characterized in that the installation device-bottom is also reserved with screw hole sites for installation, the installation device and the installation hole sites of the reserved installation device on the duct piece are concentric and are arranged in equal size, the screw hole sites respectively correspond, and the position of the installation device is convenient to adjust.
Preferably, the installation device is connected with the soil pressure box, after the shield segment for the model test is assembled, the osmometer, the soil pressure box, the installation device and the support sealing gasket are installed, the installation device is connected with one ends of the osmometer and the soil pressure box, which deviate from the loading surface, in a pasting connection mode, after the shield segment is installed, the loading surface of the soil pressure box is abutted to the soil body on the outer side, so that the soil pressure box is uniformly stressed, the loading surface is truly contacted with the soil body on the outer side, the osmometer is pushed to the middle part of the circular steel cylinder, the situation that the osmometer is blocked by contacting with the soil body on the outer side is avoided, and the water pressure and the soil pressure around the segment can be accurately monitored by the water pressure sensor and the soil pressure sensor monitoring assembly.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the shield segment structure for the model test is formed by splicing four segments of a top sealing block, a connecting block A, a connecting block B and a standard block, and the problems of segment splicing, segment sealing and tail grouting after assembly in the real simulation of shield tunnel construction in the model test are solved through segment preset grouting holes, splicing panels, sealing grooves and other mechanism settings, and the implementation of model test splicing work is easy, so that the authenticity of the shield model test is ensured.
2. The water and soil pressure monitoring assembly realizes monitoring of water and soil pressure values around the pipe piece through the osmometer and the soil pressure box which are embedded in the model test shield pipe piece support in a circumferential manner, and can enable the loading surface of the soil pressure box to be abutted against the outside soil body after the shield pipe piece is installed, so that the soil pressure box is uniformly stressed and truly contacts with the outside soil body, the osmometer is prevented from blocking the monitoring surface by contacting with the soil body, the distribution rule of water pressure around the pipe piece, the stress deformation rule of the pipe piece and the surrounding rock pressure development process are reflected relatively accurately, and the accuracy of monitoring of the water and the soil pressure of the shield model test is ensured.
3. The sensor mounting device provided by the invention has the advantages that the water and soil pressure monitoring assembly is connected with the pipe piece structure, the monitoring assembly is fixed in the steel cylinder of the mounting device by being stuck, the mounting device is connected with the monitoring assembly to facilitate the disassembly and replacement, the detection is conveniently carried out when the monitoring value of the sensor is inaccurate, the tight connection between the loading surface of the soil pressure box and the soil body can be realized, and the monitoring safety of the shield model test is improved.
Drawings
Fig. 1 is a schematic view of the segment structure of the present invention.
Fig. 2 is a schematic view of the assembled segment according to the present invention.
Fig. 3 is a schematic view of the structure and assembly of the mounting assembly of the present invention.
Detailed Description
The following describes specific embodiments of the present invention in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the invention, are not intended to limit the invention.
Referring to fig. 1, fig. 2 and fig. 3, fig. 1 is a schematic diagram of a model test shield segment structure capable of realizing water and soil pressure monitoring provided by the invention; FIG. 2 is a schematic diagram of assembly composition of a model test shield segment provided by the invention; fig. 3 is a schematic view of a mounting component structure and assembly of the monitoring assembly according to the present invention.
In a specific embodiment, the invention provides a model test shield segment structure capable of realizing soil pressure monitoring, which mainly comprises a shield segment capping block (1) capable of being spliced, a connecting block A (2), a connecting block B (3), a standard block (4), a sensor mounting assembly (11), a soil pressure monitoring component (12-1), a water pressure monitoring component-osmometer (12-2) and sealing assemblies (14) (15) (16), and is characterized in that: each ring segment of the model test shield segment is formed by splicing a shield segment jacking block (1), a connecting block A (2), a connecting block B (3) and a standard block (4), a soil pressure monitoring component, namely a soil pressure box (12-1), and a water pressure monitoring component, namely an osmometer (12-2), are installed and fixed on a sensor installation component, namely an installation device (11), the installation device (11) is inserted into a sensor reserved hole (10-1/10-2) reserved on the segment and is connected and fixed with the segment through an installation device base (11-2), monitoring data of the soil pressure box (12-1) are transmitted through a soil pressure box transmission cable (13-1) connected and fixed at the tail of the soil pressure box (12-1), and monitoring data of the osmometer (12-2) are transmitted through an osmometer transmission cable (13-2) connected and fixed at the tail of the osmometer (12-2).
The invention provides a model test shield segment which is a main assembly component of a newly built tunnel in shield test simulation, is an innermost barrier of a newly built tunnel and bears the actions of resisting soil layer pressure, underground water pressure and some special loads.
The design of the model test shield segment sealing block (1), the connecting block A (2), the connecting block B (3) and the standard block (4) is as follows: each annular duct piece is formed by splicing a shield duct piece sealing block (1), a connecting block A (2), a connecting block B (3) and a standard block (4), so that the assembly of a test site is facilitated, a longitudinal contact panel (5) is designed between longitudinal different annular duct pieces, a longitudinal connecting bolt fixing hole (6) is reserved, a circumferential contact panel (7) is designed between annular different duct pieces, and a circumferential connecting bolt fixing hole (8) is reserved.
For guaranteeing that the stable structure sets up inside stiffening rib (17) of section of jurisdiction of needs of sensor and slip casting, realize shield tail slip casting, reserved grouting holes (9) on one of the stiffening rib of section of jurisdiction (1), for realizing the soil pressure monitoring function around the section of jurisdiction, select two reserved soil pressure box mounting holes (10-1) and osmometer mounting hole (10-2) in shield section of jurisdiction top block (1), connecting block A (2), connecting block B (3), inside three stiffening rib of standard block (4).
The shield segment for the model test is provided with grooves at the splicing seams of the annular segments of different longitudinal rings and the splicing seams of the annular segments of different annular rings of the tunnel, and the rubber sealing strip is stuck during installation, so that water leakage is avoided after installation. In order to realize the longitudinal and circumferential sealing of the duct piece, grooves are reserved in the longitudinal contact panel (5) and the circumferential contact panel (7) so as to be convenient for installing the circumferential sealing strip (15) and the longitudinal sealing strip (16) for sealing.
The design of the mounting assembly is as follows: the installation component is an installation device (11) for adapting to a soil pressure box (12-1) and an osmometer (12-2), the installation device is two circular steel cylinders (11-1) (11-5) with upper covers at the upper parts, a base (11-2) connected with a duct piece is arranged at the lower parts, a soil pressure box cable hole (11-3) and an osmometer cable hole (11-6) are reserved in the middle of the steel cylinders, and a bolt installation hole (11-4) connected with the duct piece is reserved on the base of the installation device. The inner diameters of the soil pressure box embedded circular steel cylinder (11-1) and the osmometer embedded circular steel cylinder (11-5) are 2-3 mm larger than the diameters of the soil pressure box and the osmometer, the length of the circular steel cylinder is equal to the thickness of the concrete jacking pipe or the sunk well, in order to realize the sealing of the hole of the sensor, the mounting device (11) is provided with a support sealing gasket (14) for sealing when being connected with the pipe piece, and the mounting assembly, together with the monitoring assembly, can be conveniently and rapidly detached, so that the sensor can be conveniently replaced in the test process.
The monitoring component is designed as follows: the soil pressure box transmission cable (13-1) for transmitting data is positioned under the circle center of the soil pressure box (12-1), the transmission cable (13-2) for transmitting monitoring data of the osmometer is positioned under the circle center of the soil pressure box (12-2), and the soil pressure box transmission cable (13-1) and the sensor cable hole (11-3) on the support are in sealing connection with the support (11) through sealing glue. The transmission cable (13-2) of the osmometer and the sensor cable hole (11-6) on the support are sealed by sealant.
Claims (4)
1. The model test shield segment capable of realizing water and soil pressure monitoring is characterized by comprising a shield segment sealing block (1), a connecting block A (2), a connecting block B (3), a standard block (4), a sensor mounting assembly (11), a soil pressure monitoring component (12-1) and a water pressure monitoring component (12-2) which can be spliced; the method is characterized in that: each ring segment of the model test shield segment is formed by splicing a shield segment jacking block (1), a connecting block A (2), a connecting block B (3) and a standard block (4), a soil pressure monitoring component, namely a soil pressure monitoring component (12-1), and a water pressure monitoring component, namely an osmometer (12-2), are installed and fixed on a sensor installation assembly (11), the sensor installation assembly (11) is inserted into a reserved sensor reserved hole reserved on the segment and is connected and fixed with the model test shield segment through an installation device base (11-2), monitoring data of the soil pressure monitoring component (12-1) are transmitted through a soil pressure box transmission cable (13-1) connected and fixed at the tail of the soil pressure monitoring component (12-1), and monitoring data of the osmometer (12-2) are transmitted through an osmometer transmission cable (13-2) connected and fixed at the tail of the water pressure monitoring component (12-2).
2. The model test shield segment capable of realizing water and soil pressure monitoring according to claim 1, wherein the design of the model test shield segment capping block (1), the connecting block A (2), the connecting block B (3) and the standard block (4) is as follows: in order to facilitate assembly of a test site, a longitudinal contact panel (5) is designed among longitudinal different ring pipe pieces, a longitudinal connecting bolt fixing hole (6) is reserved, a circumferential contact panel (7) is designed among different ring pipe pieces in a circumferential direction, a circumferential connecting bolt fixing hole (8) is reserved, reinforcing ribs (17) inside the pipe pieces are arranged for ensuring stable arrangement of a sensor and grouting, tail grouting is realized, grouting holes (9) are reserved on one of the reinforcing ribs of a model test shield pipe piece, and in order to realize a function of monitoring surrounding soil pressure of the model test pipe piece, two reserved soil pressure box mounting holes (10-1) and a osmometer mounting hole (10-2) are selected from three reinforcing ribs inside a model test shield pipe piece top sealing block (1), a connecting block A (2), a connecting block B (3) and a standard block (4); in order to realize the longitudinal and circumferential sealing of the duct piece, grooves are reserved in the longitudinal contact panel (5) and the circumferential contact panel (7) so as to be convenient for installing the circumferential sealing strip (15) and the longitudinal sealing strip (16) for sealing.
3. The model test shield segment capable of realizing water and soil pressure monitoring according to claim 1, wherein the segment is characterized in that: for adapting to a soil pressure monitoring component (12-1) and a water pressure monitoring component (12-2), a sensor mounting component (11) is a soil pressure box embedded circular steel cylinder (11-1) with no upper cover at the upper part and a osmometer embedded circular steel cylinder (11-5) with no upper cover at the upper part, soil pressure box transmission cable holes (11-3) and osmometer transmission cable holes (11-6) are reserved in the middle parts of the two steel cylinders respectively, a base (11-2) connected with a duct piece is arranged at the lower parts of the two steel cylinders, and bolt mounting holes (11-4) connected with the duct piece are reserved on the base; the inner diameters of the soil pressure box embedded circular steel cylinder (11-1) and the osmometer embedded circular steel cylinder (11-5) are 2-3 mm larger than the diameters of the soil pressure box and the osmometer, the length of the circular steel cylinder is equal to the thickness of the concrete jacking pipe or the sinking well, in order to realize the sealing of the hole of the sensor, a supporting seat sealing gasket (14) is arranged for sealing when the sensor mounting assembly (11) is connected with the pipe piece, and the sensor mounting assembly (11) is connected with the monitoring assembly in a detachable mode.
4. The model test shield segment capable of realizing water and soil pressure monitoring according to claim 1, wherein the segment is characterized in that: the transmission cable (13-1) for transmitting the monitoring data of the soil pressure box is positioned under the center of the soil pressure monitoring component (12-1), the transmission cable (13-2) for transmitting the monitoring data of the osmometer is positioned under the center of the water pressure monitoring component (12-2), and the transmission cable are both in sealing connection with the sensor mounting component (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310440728.5A CN116519444A (en) | 2023-04-23 | 2023-04-23 | Model test shield segment capable of realizing water and soil pressure monitoring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310440728.5A CN116519444A (en) | 2023-04-23 | 2023-04-23 | Model test shield segment capable of realizing water and soil pressure monitoring |
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| CN116519444A true CN116519444A (en) | 2023-08-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310440728.5A Pending CN116519444A (en) | 2023-04-23 | 2023-04-23 | Model test shield segment capable of realizing water and soil pressure monitoring |
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|---|---|---|---|---|
| CN105258824A (en) * | 2015-11-05 | 2016-01-20 | 白云 | Water and soil pressure monitoring rod for shield tunnel |
| CN210833966U (en) * | 2019-12-19 | 2020-06-23 | 中国电建集团成都勘测设计研究院有限公司 | Shield tunnel soil pressure cell fixing device |
| CN111636898A (en) * | 2020-05-21 | 2020-09-08 | 北京交通大学 | Shield segment stress testing device in connection channel construction process of shield tunnel |
| CN113969804A (en) * | 2021-10-21 | 2022-01-25 | 长江勘测规划设计研究有限责任公司 | Tunnel segment outer water pressure monitoring device and mounting method |
| CN115749957A (en) * | 2022-11-25 | 2023-03-07 | 南昌轨道交通集团有限公司 | Shield tunnel water and soil pressure testing method |
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2023
- 2023-04-23 CN CN202310440728.5A patent/CN116519444A/en active Pending
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| CN105258824A (en) * | 2015-11-05 | 2016-01-20 | 白云 | Water and soil pressure monitoring rod for shield tunnel |
| CN210833966U (en) * | 2019-12-19 | 2020-06-23 | 中国电建集团成都勘测设计研究院有限公司 | Shield tunnel soil pressure cell fixing device |
| CN111636898A (en) * | 2020-05-21 | 2020-09-08 | 北京交通大学 | Shield segment stress testing device in connection channel construction process of shield tunnel |
| CN113969804A (en) * | 2021-10-21 | 2022-01-25 | 长江勘测规划设计研究有限责任公司 | Tunnel segment outer water pressure monitoring device and mounting method |
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