CN116642718A - Communication channel excavation test device, system and method - Google Patents
Communication channel excavation test device, system and method Download PDFInfo
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- CN116642718A CN116642718A CN202310277632.1A CN202310277632A CN116642718A CN 116642718 A CN116642718 A CN 116642718A CN 202310277632 A CN202310277632 A CN 202310277632A CN 116642718 A CN116642718 A CN 116642718A
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- 238000004891 communication Methods 0.000 title claims abstract description 126
- 238000012360 testing method Methods 0.000 title claims abstract description 109
- 238000009412 basement excavation Methods 0.000 title claims abstract description 81
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000002689 soil Substances 0.000 claims abstract description 38
- 238000004088 simulation Methods 0.000 claims abstract description 23
- 239000012530 fluid Substances 0.000 claims abstract description 20
- 238000010276 construction Methods 0.000 claims abstract description 17
- 230000008569 process Effects 0.000 claims abstract description 15
- 238000007599 discharging Methods 0.000 claims abstract description 4
- 230000007246 mechanism Effects 0.000 claims description 23
- 238000012544 monitoring process Methods 0.000 claims description 9
- 238000006073 displacement reaction Methods 0.000 claims description 7
- 238000005192 partition Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 238000010998 test method Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 230000008859 change Effects 0.000 abstract description 5
- 238000003825 pressing Methods 0.000 description 12
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- 239000000243 solution Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 229920000049 Carbon (fiber) Polymers 0.000 description 3
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- 239000004568 cement Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 3
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Classifications
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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
- G01M99/00—Subject matter not provided for in other groups of this subclass
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/32—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring the deformation in a solid
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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
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a device, a system and a method for excavating and testing a communication channel. The axial two ends of the channel main body are grooved and are movably provided with a plurality of telescopic members distributed in the circumferential direction, the upper wall and the lower wall of the two simulation main tunnels, which are opposite to the openings, are respectively provided with grooves and are movably provided with a second liner and a third liner which are matched with each other, so that when the communication channel excavation test device is used for testing, the axial extension degree of the telescopic members and the circumferential positions of the second liner and the third liner can be adjusted to change the axial height and the length of the simulation communication channel so as to meet the simulation requirements of different working conditions, and the communication channel excavation test device has good universality and relatively low manufacturing cost and test cost. In addition, the invention can simulate the soil rebound phenomenon of the excavation construction process of the communication channel by discharging the fluid in the supporting bag, thereby more accurately simulating the excavation construction process of the communication channel.
Description
Technical Field
The invention relates to the technical field of communication channel construction tests, in particular to a communication channel excavation test device, a communication channel excavation test system and a communication channel excavation test method.
Background
The communication channel is a channel which is arranged between two main tunnels (such as a subway tunnel, a highway tunnel, a pipe gallery, a deep buried drainage tunnel, etc.) and is connected with the two main tunnels, and is usually connected with a collection pump station and a drainage pump station to be combined and built, so that the functions of connecting the two main tunnels, collecting, draining, overhauling, rescuing from fire, etc. are jointly achieved.
The connecting channel is generally constructed by a shield, so as to reduce the earth excavation amount of the connecting channel and facilitate the safety in engineering construction, and the connecting channel is generally selected to be excavated at the minimum distance between two main tunnels, namely the connecting channel is generally positioned between the central positions of the two main tunnels. But in practice due to the complexity of the actual engineering geology, such as the presence of boulders, poor geology, etc. The construction of the communication channel at the central position of the tunnel is not necessarily the safest, and the axle center height of the communication channel and the length of the communication channel need to be changed. If the treatment is improper, a large engineering accident is caused. How to determine the preferred height and length of the axis of the communication channel under different working conditions can be generally determined in an auxiliary manner through simulation test research.
However, the length of the connecting channel model of the conventional connecting channel excavation test device and the relative positions of the connecting channel model and the two main tunnel models are fixed, and each set of test device can only simulate one axial height and length of the connecting channel 1, so that a plurality of sets of test devices are required to be manufactured to simulate different axial heights and lengths of the connecting channel 1, and obviously, the test devices have no universality and have relatively high manufacturing and test costs.
In addition, in actual engineering, the upper soil body of the non-excavated soil layer can exert pressure on the lower soil body, and the lower soil body can be compressed due to the action of the upper pressure. And in the process of excavating the connecting channel, when the upper Fang Tuti positioned in front of the excavating direction is excavated, the channel lining of the position is in a state to be installed, and at the moment, the pressure exerted by the upper soil body born by the soil body below the position is lost, so that the phenomenon of excavating and unloading is generated. Just as the compressed spring is removed from the compression force, the phenomenon of soil rebound can occur, which tends to recover to the original shape. The existing connection channel excavation test cannot simulate the excavation unloading phenomenon of soil.
Disclosure of Invention
The invention mainly aims to provide a communication channel excavation test device, a communication channel excavation test system and a communication channel excavation test method, which aim to meet test requirements of different working conditions and simultaneously reduce manufacturing and test costs.
In order to achieve the above object, the present invention provides a communication channel excavation test device, including:
the simulated communication channel comprises a tubular channel main body, wherein two axial end faces of the channel main body are respectively provided with a containing groove, a first liner is movably inserted in the containing grooves, the simulated communication channel comprises a plurality of annular telescopic pieces, and each telescopic piece can axially move along the containing groove;
a first locking mechanism for locking the telescoping member to the channel body;
the two simulated main tunnels are arranged side by side, openings for the first inner containers to extend in are formed in opposite areas of the two simulated main tunnels respectively, a first accommodating groove extending in a circumferential direction is formed in the upper wall of the opening, a second accommodating groove extending in a circumferential direction is formed in the lower wall of the opening, a second inner container capable of sliding in the circumferential direction along the first accommodating groove is movably mounted in the first accommodating groove, a third inner container which is matched with the second inner container and capable of sliding in the circumferential direction along the second accommodating groove is movably mounted in the second accommodating groove, and the second inner container and the third inner container can slide between positions propped against or separated from the first inner container;
the second locking mechanism is used for locking the second liner to the simulated main tunnel; and
and the third locking mechanism is used for locking the third liner to the simulated main tunnel.
The invention further provides a communication channel excavation test system, which comprises:
the model box is used for containing test soil;
the excavation test device is the communication channel excavation test device and can be buried in test soil;
the support bag is arranged in the simulated communication channel, and can form a support on the inner wall of the simulated communication channel when fluid with preset pressure is injected into the support bag; and
and the monitoring system is used for acquiring deformation and/or displacement data of the required simulated communication channel.
The invention also provides a method for excavating and testing the communication channel, which comprises the following steps:
s1, adjusting the axial extension degree of the telescopic piece and the circumferential positions of the second liner and the third liner according to test working conditions and requirements so that the second liner and the third liner are matched and abutted against the telescopic piece extending into the opening, and completing the connection operation of the excavation test device;
s2, injecting fluid with preset pressure into the support bag so that the support bag forms support for the analog communication channel;
s3, burying the excavation test device in a test soil body and compacting;
s4, discharging fluid in the support bag to simulate excavation unloading phenomenon during excavation construction of a communication channel;
s5, obtaining deformation and/or displacement data of the simulated communication channel through the monitoring system.
According to the communication channel excavation test device, the grooves are formed in the two axial ends of the channel main body, the plurality of annularly distributed telescopic pieces are movably arranged, the grooves are respectively formed in the upper wall and the lower wall of the opposite openings of the two simulated main tunnels, and the second liner and the third liner which are matched with each other are movably arranged, so that when the communication channel excavation test device is used for testing, the axial extension degree of the telescopic pieces and the annular positions of the second liner and the third liner can be adjusted to change the axial center height and the length of the simulated communication channel, the simulation requirements of different working conditions are met, the good universality is achieved, and the corresponding manufacturing cost and the test cost are lower. In addition, the communication channel excavation test system is provided with the support bag in the simulation communication channel, when the support bag is filled with the fluid with the preset pressure or the preset quantity, the support bag can simulate the soil body which is not excavated and form support on the inner wall of the simulation communication channel, and meanwhile, the lower soil body can be compressed through the simulation communication channel. After the fluid in the supporting bag is discharged, the supporting bag does not form a support for the simulated communication channel, and the lower soil body is compressed through the simulated communication channel, so that the lower soil body generates an elastic recovery trend, the soil body rebound phenomenon of the communication channel excavation construction process can be simulated, the excavation construction process of the communication channel can be simulated more accurately, and more accurate reference data can be provided for determining the better axle center height and length of the communication channel under different working conditions in the actual construction process.
Drawings
FIG. 1 is a schematic illustration of the communication channel excavation test apparatus of the present invention with a simulated communication channel in a lower limit position;
FIG. 2 is a schematic illustration of the communication channel excavation test apparatus of the present invention with the simulated communication channel in an intermediate position;
FIG. 3 is a schematic illustration of the communication channel excavation test apparatus of the present invention with the simulated communication channel in an upper limit position;
FIG. 4 is a schematic diagram showing the cooperation of a first liner, a second liner and a third liner of the communication channel excavation test apparatus according to the present invention;
FIG. 5 is an axial view of a simulated communication channel of the present invention;
FIG. 6 is a schematic view of the mating of two adjacent circumferentially extending telescoping members;
fig. 7 is a schematic diagram of a communication channel excavation test system of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, in the embodiment of the present invention, directional indications (such as up, down, left, right, front, rear, top, bottom, inner, outer, vertical, lateral, longitudinal, counterclockwise, clockwise, circumferential, radial, axial … …) are referred to, and the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first" or "second" etc. in the embodiments of the present invention, the description of "first" or "second" etc. is only for descriptive purposes, and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
The invention provides a communication channel excavation test device.
In the embodiment of the invention, as shown in fig. 1 to 7, the communication channel excavation test device comprises a simulated communication channel 1, a first locking mechanism, two simulated main tunnels 2 arranged side by side, a second locking mechanism and a third locking mechanism.
The simulated communication channel 1 comprises a tubular channel main body 10, two axial end faces of the channel main body 10 are respectively provided with a containing groove 11, a first liner 12 is movably inserted in the containing groove 11, the whole first liner 12 is tubular and comprises a plurality of annular distributed telescopic pieces 121, each telescopic piece 121 can axially move along the containing groove 11, and two adjacent telescopic pieces 121 are directly attached to each other or separated by a separation piece 122 to jointly form a tubular integral structure. The first locking mechanism is used to lock the telescoping member 121 to the channel body 10 to prevent improper axial movement of the telescoping member 121. The opposite areas of the two simulated main tunnels 2 are respectively formed with an opening 20 for the first liner 12 to extend in, a first accommodating groove 21a extending in a circumferential direction is formed on the upper wall of the opening 20, a second accommodating groove 21b extending in a circumferential direction is formed on the lower wall of the opening 20, and a certain interval (as shown in fig. 1) can exist between the extending ends of the first accommodating groove 21a and the second accommodating groove 21b in the circumferential direction or the first accommodating groove and the second accommodating groove are communicated and connected into a whole. The first accommodating groove 21a is movably provided with a second liner 22a which can slide along the annular direction of the first accommodating groove 21a, the second accommodating groove 21b is movably provided with a third liner 22b which is matched with the second liner 22a and can slide along the annular direction of the second accommodating groove 21b, and the second liner 22a and the third liner 22b can slide between the positions which are propped against or separated from the first liner 12. The second locking mechanism is used for locking the second liner 22a to the simulated main tunnel 2 so as to prevent the second liner 22a from abnormal circumferential sliding; the third locking mechanism is used for locking the third liner 22b to the simulated main tunnel 2 so as to prevent the third liner 22b from abnormally sliding in a circumferential direction. When the communication channel excavation test device is used for testing, the axial extension degree of the telescopic piece 121 and the annular positions of the second liner 22a and the third liner 22b can be adjusted to change the axial center height and the length of the simulation communication channel 1, so that the simulation requirements of different working conditions are met, the device has good universality, and the corresponding manufacturing cost and test cost are low.
It should be noted that, when the second liner 22a and the third liner 22b are matched and are abutted against the first liner 12 partially extending into the opening 20, if there is a partial gap between the first liner 12 and the second liner 22a and the third liner 22b or between the second liner 22a and the third liner 22b, a sealing support 100 (see fig. 4) with higher strength can be filled in the partial gap, so that on one hand, liquid or sand or the like can be prevented from entering the simulated connection channel 1 and/or the simulated main tunnel 2, and on the other hand, the bonding strength and the uniformity of stress at the bonding position and/or the matching position can be improved, so that the acting force among the first liner 12, the second liner 22a and the third liner 22b is relatively uniform. Specifically, the sealing support 100 is mainly formed by filling and solidifying cement paste, structural adhesive, concrete, crack grouting material, or the like.
To further secure the water resistance of the junction of the simulated connection channel 1 and the simulated main tunnel 2, geotextiles (not shown) may be wrapped at least at the junction of the simulated connection channel 1 and the simulated main tunnel 2.
In one embodiment of the invention, two adjacent telescopic members in the circumferential direction are directly or indirectly sealed against each other and can move axially relatively. Further, in order to prevent water or sand from entering the simulation communication channel 1, a waterproof layer (not shown) is disposed on the contact surface of two adjacent expansion pieces 121 in the circumferential direction, the waterproof layer may be made of rubber or silica gel, and the waterproof layer may be disposed on the contact surface of the expansion pieces 121 in an embedding, bonding or coating manner.
Specifically, as shown in fig. 6, one side of each expansion member 121 in the circumferential direction is provided with a tenon 1211 extending in the circumferential direction, the other side in the circumferential direction is provided with a clamping groove 1212 corresponding to the tenon 1211, and two adjacent expansion members 121 in the circumferential direction are mutually clamped by matching of the tenon 1211 and the clamping groove 1212, and can move axially relatively to adjust the extending degree. Preferably, the tongue 1211 has a T-shaped or T-shaped-like structure, and the cross section of the slot 1212 has a T-shaped or T-shaped-like shape corresponding thereto, which can improve the overall structural strength of the first liner 12.
In another embodiment of the present invention, a partition 122 is further disposed between every two adjacent telescopic members 121, and the partition 122 is also movably inserted into the accommodating groove 11 and can move axially along the accommodating groove 11 to adjust the extension. The mating surfaces of the telescoping member 121 and the divider 122 are similarly sealed.
It will be appreciated that the number of the telescopic members 121 may be set according to the needs, and may be generally 10 to 50, preferably 20 to 30, and more preferably 24 to 26.
The expansion member 121 is made of a material having a high strength, such as a metal, an alloy, a polymer material, or carbon fiber, preferably stainless steel. Meanwhile, the separator 122 may be made of a material having high strength, such as metal, alloy, polymer material, carbon fiber, etc., preferably stainless steel.
In some embodiments of the present invention, as shown in fig. 5, the circumferential dimension of the expansion member 121 is greater than the circumferential dimension of the partition 122, and may be generally 2 to 8 times, preferably 3 to 5 times, the circumferential dimension of the partition 122.
In an embodiment of the present invention, as shown in fig. 2, the first locking mechanism includes at least one first screw hole (not labeled) formed on an inner wall and/or an outer wall of the channel main body 10 (preferably formed on an inner wall of the channel main body 10) corresponding to each expansion member 121, and a first screw 200 engaged with the first screw hole, and after the extension degree of the expansion member 121 is adjusted, the first screw 200 at the corresponding first screw hole is screwed into abutment with the expansion member 121 to lock the expansion member 121. It will be appreciated that the number of first screw holes and the specific positions of each telescopic member 121 may be determined according to the requirements, and generally speaking, the greater the number, the better the locking effect, but the higher the cost.
In another embodiment of the present invention, the first locking mechanism includes an axial chute (not shown) formed on an inner wall and/or an outer wall of the channel main body 10 (preferably formed on the inner wall of the channel main body 10) corresponding to each expansion piece 121, a first screw portion (not shown) disposed on the expansion piece 121 and extending outwards from the chute, and a first nut (not shown) engaged with the first screw portion, and after the extension degree of the expansion piece 121 is adjusted, the first nut is screwed along the first screw portion until the first nut abuts against the channel main body 10, so as to lock the expansion piece 121.
It will be appreciated that a locking mechanism may be provided to lock the divider 122 to the channel body 10 if desired for testing, and this locking mechanism may refer to the first locking mechanism embodiment and will not be described in detail herein.
In some embodiments of the present invention, the second inner container 22a includes a plurality of first pressing members 22a1 distributed in an axial direction, where the plurality of first pressing members 22a1 are each in a circular arc rod structure adapted to the first receiving groove 21a, and fill the entire first receiving groove 21a in the axial direction, and can slide along the first receiving groove 21a in a circumferential direction, and when the assembly of the simulated communication channel 1 and the simulated main tunnel 2 is completed, the first pressing member 22a1 opposite to the simulated communication channel 1 abuts against the simulated communication channel 1, and the first pressing member 22a1 dislocated with the simulated communication channel 1 abuts against the third inner container 22 b.
It will be appreciated that the number of the first pressing members 22a1 may be determined according to the test requirements, and may be generally 10 to 50, preferably 20 to 30, and more preferably 22 to 26. In general, the greater the number, the greater the total interference surface of the first pressure-contact piece 22a1 with the simulated communication passage 1, and the smaller the gap that may exist between the simulated main tunnel 2 and the simulated communication passage 1.
It will be appreciated that the circumferential and axial dimensions of the opening 20 will generally be determined by the requirements of the test, and it is desirable to compromise the versatility of the test and the structural stability. Generally, the circumferential dimension of the opening 20 may be 0.25 to 0.5 times, preferably 0.3 to 0.4 times, the circumference of the simulated main tunnel 2, and in this case, the requirements of the versatility and structural stability of the test can be well satisfied. The axial dimension of the opening 20 may be generally 1 to 3 times, preferably 1.5 to 2 times, the diameter of the analog communication channel 1.
In some embodiments of the present invention, the first abutting elements 22a1 that are axially adjacent may directly or indirectly seal against each other and may slide circumferentially relative to each other. Further, in order to prevent water or sand from entering the simulation main tunnel 2, a waterproof layer (not shown) may be disposed on the contact surface of two axially adjacent first pressing members 22a1, and similarly, the waterproof layer may be made of rubber or silica gel, and the waterproof layer may be disposed on the contact surface of the first pressing members 22a1 by embedding, bonding or coating.
In the embodiment of the present invention, in order to improve the overall strength of the second liner 22a, two axially adjacent first pressing members 22a1 may be movably clamped by matching a tongue and a groove, and the clamping manner between the telescopic members 121 may be referred to specifically, which will not be described herein.
In the embodiment of the present invention, the first pressing member 22a1 and the second pressing member 22b1 may be made of a material with relatively high strength, such as a metal, an alloy, a polymer material, or carbon fiber, and preferably made of stainless steel.
It will be appreciated that various embodiments of the second locking mechanism and the third locking mechanism are also available, for example, embodiments that are the same as or similar to those of the first locking mechanism, and detailed descriptions of the embodiments of the second locking mechanism and the third locking mechanism are not repeated here.
Similarly, in some embodiments of the present invention, the third liner 22b may be the same as the second liner 22a, that is, includes a plurality of second pressing members 22b1 axially distributed, and the plurality of second pressing members 22b1 are all in a circular arc-shaped rod structure adapted to the second accommodating groove 21b, which is not described herein again.
It can be understood that the materials of the simulated connection channel 1 and the simulated main tunnel 2 can be selected and used according to a certain similarity ratio by combining the parameters according to the working conditions in the actual engineering, and the detailed description is omitted here.
Having described embodiments of the communication channel excavation test apparatus of the present invention, embodiments of a test system having the communication channel excavation test apparatus described above will be described. The specific structure of the communication channel excavation test device is shown in the above embodiment, and the repetition is omitted.
As shown in fig. 1 to 7, the communication channel excavation test system includes a model box 4, an excavation test apparatus, a support bag 3, and a monitoring system (not shown). The mold box 4 is used for holding the test soil 41, and the mold box 4 is well known to those skilled in the art, for example, a square box structure with an open top may be used, and the specific structure thereof will not be described herein. The excavation test device is the above-mentioned communication channel excavation test device, and it can be buried in the inside test soil body of model case 4, and the specific structure of excavation test device is referred to above-mentioned embodiment, and this is not repeated here. The support bag 3 is arranged in the simulated communication channel 1 of the excavation test device, and when the fluid 31 with preset pressure or preset quantity is injected into the support bag 3, the support can be formed on the inner wall of the simulated communication channel 1; the monitoring system is used for acquiring deformation and/or displacement data of the required analog communication channel 1 for research and analysis, and as to how to analyze specifically, the prior art may be adopted, and no description is repeated here. When the communication channel excavation test system is used for testing, the axial extension degree of the telescopic piece 121 and the annular positions of the second liner 22a and the third liner 22b can be adjusted to change the axial center height and the length of the simulation communication channel 1, so that the simulation requirements of different working conditions are met, the communication channel excavation test system has good universality and relatively low manufacturing cost and test cost. In addition, the communication channel excavation test system of the present invention is provided with the support bag 3 inside the simulated communication channel 1, and when the support bag 3 is filled with the predetermined pressure or the predetermined amount of the fluid 31, the support bag 3 can simulate the soil body which is not excavated and form the support for the inner wall of the simulated communication channel 1, and simultaneously can compress the soil body under the simulated communication channel 1. After the fluid 31 in the support bag 3 is discharged, the support bag 3 does not form a support for the simulation communication channel 1 any more, and the lower soil body is not compressed by the simulation communication channel 1 any more, so that the lower soil body generates an elastic recovery trend, the rebound phenomenon of the soil body in the excavation construction process of the communication channel can be simulated, the excavation construction process of the communication channel can be simulated more accurately, and more accurate reference data are provided for researching the fact that the optimal axle center height and length of the communication channel under different working conditions are determined in the actual construction process.
It should be noted that, when the second liner 22a and the third liner 22b are matched and are abutted against the first liner 12 partially extending into the opening 20, if there is a partial gap between the first liner 12 and the second liner 22a and the third liner 22b or between the second liner 22a and the third liner 22b, a sealing support 100 with higher strength can be filled in the partial gap, so that, on one hand, liquid or sand or the like can be prevented from entering the simulated connection channel 1 and/or the simulated main tunnel 2, and on the other hand, the bonding strength and the uniformity of stress at the bonding location and/or the matching location can be improved, so that the acting force among the first liner 12, the second liner 22a and the third liner 22b is relatively uniform. Specifically, the support body is mainly formed by filling and solidifying cement paste, structural adhesive, concrete or crack grouting materials and the like.
In the embodiment of the present invention, the support bag 3 is made of a soft waterproof material, for example, a rubber film, a nylon fabric, an oxford fabric, or a sheepskin. The support cells 3 have an interface communicating with the inner and outer spaces to input or discharge fluid 31 therethrough.
It is understood that the monitoring system according to the present invention is in the prior art, and generally includes at least one of a data acquisition device (not shown), a strain gauge (not shown), a stress sensor (not shown), a surface monitor (not shown), and other detection apparatuses, and is mainly used for acquiring at least one of horizontal and vertical displacement of the analog communication channel 1, and stress and strain data at a connection position between the analog communication channel 1 and the analog main tunnel 2, and as for the specific structure, the arrangement manner, the working principle, and the like of the data acquisition device and the detection apparatus are well known to those skilled in the art, and will not be repeated herein.
Having described embodiments of the communication channel excavation test system of the present invention, embodiments of test methods utilizing the communication channel excavation test system described above will be described. The specific structure of the communication channel excavation test system is shown in the above embodiment, and the repetition is omitted.
As shown in fig. 1 to 7, the method for excavating and testing the communication channel comprises the following steps:
s1, according to the test working conditions and requirements, the axial extension degree of the telescopic piece 121 and the circumferential positions of the second liner 22a and the third liner 22b are adjusted, so that the second liner 22a and the third liner 22b are matched and are propped against the telescopic piece 121 extending into the opening 20, the simulated communication channel 1 is located at the axle center height required by the test, and the connection operation of the excavation test device is completed.
It will be appreciated that, in step S1, when the second liner 22a and the third liner 22b are matched and are abutted against the first liner 12 partially extending into the opening 20, if there is a partial gap between the first liner 12 and the second liner 22a and the third liner 22b or between the second liner 22a and the third liner 22b, the process of filling the partial gap to form the seal support 100 with higher strength is further included, so that, on one hand, liquid or sand or the like can be prevented from entering the simulated connection channel 1 and/or the simulated main tunnel, and on the other hand, the bonding strength and the uniformity of stress at the bonding site and/or the matching site can be improved, so that the acting force among the first liner 12, the second liner 22a and the third liner 22b is relatively uniform.
Specifically, the sealing support 100 is mainly formed by filling and solidifying cement paste, structural adhesive, concrete, crack grouting material, or the like.
S2, injecting a predetermined pressure or a predetermined amount of fluid 31 into the support cell 3, so that the support cell 3 forms a support for the analog communication channel 1.
Specifically, the fluid 31 may be a "single-phase flow" such as a gas or a liquid (e.g., water), or may be a "two-phase flow" such as a liquid+solid particle or a gas+solid particle. The support cells 3 after injection of a predetermined pressure or amount of fluid 31 may simulate an unexcavated upper body of earth.
S3, burying the excavation test device in a test soil body and compacting.
In the embodiment of the invention, the process of burying the excavation test device in the test soil body and compacting the excavation test device is preferably to add and compact the test soil body with the preset thickness in advance, and then the excavation test device is placed on the test soil body with the preset thickness; and then, continuously adding the test soil in layers and compacting until the excavation test device is buried. It will be appreciated that the preparation of test soil belongs to the prior art and will not be described in detail here.
And S4, discharging the fluid 31 in the support bag 3 to simulate the excavation unloading phenomenon during excavation construction communication channels.
In the embodiment of the present invention, the support bag 3 is made of a soft waterproof material, for example, a rubber film, a nylon fabric, an oxford fabric, or a sheepskin. The support cells 3 have an interface communicating with the inner and outer spaces to input or discharge fluid 31 therethrough.
S5, obtaining deformation and/or displacement data of the simulated communication channel 1 through a monitoring system.
According to the method for excavating and testing the communication channel, when the method is used for testing, the axial extension degree of the telescopic piece 121 and the annular positions of the second liner 22a and the third liner 22b can be adjusted to change the axial center height and length of the simulation communication channel 1, so that the simulation requirements of different working conditions are met, the method has good universality, and the corresponding manufacturing cost and test cost are low. In addition, the method for testing the excavation of the communication channel of the present invention is provided with the support bag 3 inside the simulated communication channel 1, when the support bag 3 is filled with the fluid 31 of the predetermined pressure, the support bag 3 can simulate the soil body which is not excavated and form the support for the inner wall of the simulated communication channel 1, and simultaneously can compress the soil body below through the simulated communication channel 1. After the fluid 31 in the support bag 3 is discharged, the support bag 3 does not form a support for the simulation communication channel 1 any more, and the lower soil body is not compressed by the simulation communication channel 1 any more, so that the lower soil body generates an elastic recovery trend, the rebound phenomenon of the soil body in the excavation construction process of the communication channel 1 can be simulated, the excavation construction process of the communication channel 1 can be simulated more accurately, and more accurate reference data can be provided for determining the better axle center height and length of the communication channel under different working conditions in the actual construction process.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.
Claims (10)
1. Communication channel excavation test device, its characterized in that includes:
the simulated communication channel comprises a tubular channel main body, wherein two axial end faces of the channel main body are respectively provided with a containing groove, a first liner is movably inserted in the containing grooves, the simulated communication channel comprises a plurality of annular telescopic pieces, and each telescopic piece can axially move along the containing groove;
a first locking mechanism for locking the telescoping member to the channel body;
the two simulated main tunnels are arranged side by side, openings for the first inner containers to extend in are formed in opposite areas of the two simulated main tunnels respectively, a first accommodating groove extending in a circumferential direction is formed in the upper wall of the opening, a second accommodating groove extending in a circumferential direction is formed in the lower wall of the opening, a second inner container capable of sliding in the circumferential direction along the first accommodating groove is movably mounted in the first accommodating groove, a third inner container which is matched with the second inner container and capable of sliding in the circumferential direction along the second accommodating groove 2 is movably mounted in the second accommodating groove, and the second inner container and the third inner container can slide between positions propped against or separated from the first inner container 12;
the second locking mechanism is used for locking the second liner to the simulated main tunnel; and
and the third locking mechanism is used for locking the third liner to the simulated main tunnel.
2. The communication channel excavation test apparatus of claim 1, wherein: the contact surface of two adjacent telescopic members in the circumferential direction is provided with a waterproof layer.
3. The communication channel excavation test apparatus of claim 1, wherein: one side of each telescopic piece in the circumferential direction is provided with a tenon extending in the circumferential direction, the other side of each telescopic piece in the circumferential direction is provided with a clamping groove corresponding to the tenon, and two adjacent telescopic pieces in the circumferential direction are mutually clamped through the cooperation of the tenon and the clamping groove.
4. The communication channel excavation test apparatus of claim 1, wherein: and a partition piece is further arranged between every two adjacent telescopic pieces, is movably inserted into the accommodating groove, can axially move along the accommodating groove to adjust the extension degree, and is sealed with the matching surface of the partition piece.
5. The communication channel excavation test apparatus of claim 1, wherein: the first locking mechanism comprises at least one first screw hole formed in the inner wall and/or the outer wall of the channel main body and corresponding to each telescopic piece, and a first screw rod matched with the first screw hole, and the first screw rod can be screwed into the telescopic pieces along the first screw hole.
6. The communication channel excavation test apparatus of claim 1, wherein: the second liner comprises a plurality of first abutting pieces which are axially distributed, the first abutting pieces can slide along the first containing groove in the circumferential direction, the second liner comprises a plurality of second abutting pieces which are axially distributed, and the second abutting pieces can slide along the second containing groove in the circumferential direction.
7. Communication channel excavation test system, its characterized in that includes: model case, supporting bag, monitoring system and the excavation test device of arbitrary one of claims 1~6, the model case is used for splendid attire test soil body, the excavation test device can be buried in the test soil body, the supporting bag is located in the simulation communication channel, when the inside of supporting bag pours into the fluid of predetermined pressure into, can form the support to the inner wall of simulation communication channel, and monitoring system is used for obtaining the deformation and/or the displacement data of required simulation communication channel.
8. The communication channel excavation test system of claim 7, wherein: the sealing support body with higher strength is filled in a local gap existing at the joint of the first inner container and the second inner container or the joint of the second inner container and the third inner container.
9. A test method employing the communication channel excavation test system of claim 7 or 8, comprising the steps of:
s1, adjusting the axial extension degree of the telescopic piece and the circumferential positions of the second liner and the third liner according to test working conditions and requirements so that the second liner and the third liner are matched and abutted against the telescopic piece extending into the opening, and completing the connection operation of the excavation test device;
s2, injecting fluid with preset pressure into the support bag so that the support bag forms support for the analog communication channel;
s3, burying the excavation test device in a test soil body and compacting;
s4, discharging fluid in the support bag to simulate excavation unloading phenomenon during excavation construction of a communication channel;
s5, obtaining deformation and/or displacement data of the simulated communication channel through the monitoring system.
10. A test method according to claim 9 employing the communication channel excavation test system of claim 7 or 8, characterized in that: in step S1, after the second liner and the third liner are matched and are propped against the first liner partially extending into the opening, if there is a partial gap at the joint of the first liner and the second liner or the joint of the second liner and the third liner, the process of filling the partial gap to form a sealing support body with higher strength is further included.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310277632.1A CN116642718A (en) | 2023-03-20 | 2023-03-20 | Communication channel excavation test device, system and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310277632.1A CN116642718A (en) | 2023-03-20 | 2023-03-20 | Communication channel excavation test device, system and method |
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| CN202310277632.1A Pending CN116642718A (en) | 2023-03-20 | 2023-03-20 | Communication channel excavation test device, system and method |
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