CN114061992A - Assembled model groove device for indoor shield tunneling test and test method thereof - Google Patents
Assembled model groove device for indoor shield tunneling test and test method thereof Download PDFInfo
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- CN114061992A CN114061992A CN202010781024.0A CN202010781024A CN114061992A CN 114061992 A CN114061992 A CN 114061992A CN 202010781024 A CN202010781024 A CN 202010781024A CN 114061992 A CN114061992 A CN 114061992A
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- 230000005641 tunneling Effects 0.000 title claims abstract description 48
- 238000012360 testing method Methods 0.000 title claims abstract description 39
- 238000010998 test method Methods 0.000 title claims description 6
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 4
- 239000002689 soil Substances 0.000 claims description 39
- 230000000903 blocking effect Effects 0.000 claims description 14
- 238000012544 monitoring process Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 7
- 238000009434 installation Methods 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 description 6
- 238000009412 basement excavation Methods 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 230000007246 mechanism Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000003351 stiffener Substances 0.000 description 1
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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
- G01M99/007—Subject matter not provided for in other groups of this subclass by applying a load, e.g. for resistance or wear testing
Abstract
The invention discloses an assembled model groove device for an indoor shield tunneling test and an installation method thereof, wherein the assembled model groove device comprises a bottom plate formed by integrally pouring reinforced concrete and a lateral retaining column fixedly arranged above the bottom plate, an assembling plate unit comprises a plurality of strip-shaped first assembling plates which are detachably connected and can be changed in stacking sequence and a second assembling plate used for starting a model shield, and the first assembling plates and the second assembling plates are fixedly connected with the lateral retaining column in an embedded manner so as to form a model groove in an enclosing manner between the assembling plate unit and the bottom plate as well as between the assembling plate unit and the lateral retaining column; the retaining plate is detachably connected with the second assembling plate and is matched with the opening formed in the second assembling plate, and the retaining plate is used for a shield tunneling test from the openable opening. The invention can flexibly adjust the position of shield tunneling, is convenient to disassemble and assemble, and is suitable for systematically researching the influence of shield tunneling on surrounding buildings.
Description
Technical Field
The invention relates to the technical field of buildings, in particular to an assembled model groove device for an indoor shield tunneling test and a test method thereof.
Background
Excavation of a shield tunnel inevitably causes movement of surrounding strata, which in turn causes deformation of adjacent pile foundations, tunnels, pipelines, buildings and other structures, creating additional stresses that may compromise the safety of the pile body and even the upper bridge or building structure. Considering from the disturbance angle of shield excavation, the excavation face jacking and the stratum loss of the shield tail in the shield excavation process can cause disturbance to the surrounding soil body, the mechanism is complex, and the pure theoretical analysis is difficult to carry out. The model test is generally considered to be capable of well simulating the actual working condition, and the disturbance mechanism and the characteristic parameters can be discussed, so that the method has important scientific and practical significance. At present, a plurality of model experiments are carried out to research the formation loss of the shield tail by adopting a water bag shrinkage mode (for example, patent number CN 201320033769.4). If the complex effect of the disturbance mechanism needs to be researched, the development of an indoor micro shield machine is required. Different from a water bag shrinkage device, a model groove device matched with a shield machine is required to be provided with a larger hole on the side wall for shield starting. Therefore, new requirements are put on the model groove device matched with the shield machine.
The existing fabricated model groove devices usually use panels and stiffeners (usually steel bars) to form a fabricated retaining structure (for example, patent nos. CN201711363269.6, CN 201910802365.9). It usually adopts thinner panel, is aided with denser stiffening strip, does not possess the condition that opens the hole in the panel in a flexible way and is used for shield tunnel test. Therefore, at present, model test devices considering shield excavation face tunneling are all provided with fixed openings (for example, patent number CN 201911287072.8). On the other hand, when the influence of shield tunneling on the adjacent building structure needs to be researched, the position relationship between the shield tunnel and the adjacent building structure needs to be changed, so that the disturbance mechanism of the shield on the adjacent building structure under the conditions of different approach distances is researched. The model test device with the fixed hole does not have the function of flexibly adjusting the proximity position relation. If the change is needed, the die-shaped groove needs to be adjusted and modified greatly, the economic cost is increased, and the test progress is interfered greatly. At present, a model test device for an indoor shield tunnel tunneling test, which can flexibly adjust the tunneling position, is urgently needed.
Based on the situation, the invention provides an assembled model groove device for an indoor shield tunneling test and a test method thereof, which can effectively solve the problems.
Disclosure of Invention
The invention aims to solve the problem of fixed shield tunneling position in the existing model groove, and provides an assembled test device which can be assembled quickly and has an adjustable shield space position.
In order to solve the technical problems, the invention is realized by the following technical scheme:
in a first aspect, the present invention provides an assembled model slot apparatus for an indoor shield tunneling test, including a bottom plate formed by integrally casting reinforced concrete, and a lateral soil blocking column fixedly disposed above the bottom plate, further including:
the assembling plate unit is embedded and fixedly connected with the lateral retaining column, comprises a plurality of strip-shaped first assembling plates which are detachably connected and a second assembling plate which is used for starting a model shield, and realizes that the upper and lower positions of the first assembling plates and the second assembling plates are adjustable through tenons and tenons which are respectively arranged on the upper end surfaces and the lower end surfaces of the first assembling plates and the second assembling plates and are matched with each other;
the lifting hooks are respectively arranged on the tenons of the first assembling plate and the second assembling plate, are matched with the grooves formed in the tenons of the adjacent assembling plates and are used for hoisting and rapidly installing or disassembling;
and the retaining plate is detachably connected with the second assembling plate, is matched with the opening formed in the second assembling plate and is used for a shield tunneling test from the openable opening.
The structural design principle for flexibly adjusting the hole opening position of the device is that lateral soil pressure load is firstly transmitted to the assembled assembly plate unit and finally borne by the lateral soil blocking column with a large cross section. Because the lateral soil pressure load is finally borne by the retaining columns, the assembly plate units mainly play a role in transferring load in the form of one-way plates without arranging stiffening strips, and therefore, the assembly type soil pressure load bearing device has the conditions of assembly type stacking installation and hole opening. The upper surface and the lower surface of all the first assembling plates and the second assembling plates are provided with the tenon and tenon, so that the stability of the prefabricated parts during stacking and installation is improved, and the prefabricated parts are convenient to disassemble.
As a preferable technical scheme of the invention, a sponge rubber strip is arranged on a contact surface between the inside of the tenon and the tenon.
In the above structure, the sponge rubber strip is arranged in the concave tenon, so that the collision and corner falling of the tenon in the hoisting process are prevented.
As a preferable technical solution of the present invention, a sectional area of the lateral retaining column perpendicular to a length direction thereof is gradually increased from top to bottom.
In the structure, the lateral soil retaining column adopts a section with a small upper part and a large lower part, and is adaptive to the triangular load of lateral soil pressure, so that the structural stress is more reasonable.
As a preferred technical solution of the present invention, the lateral retaining pile includes a plurality of middle columns, corner outer columns and corner inner columns, and rectangular rabbets embedded and connected with the assembly plate units are respectively provided between the corner outer columns and the corner inner columns and on the middle columns.
In the above structure, rectangular rabbets are reserved on the lateral soil blocking columns for receiving the assembly plate units.
As a preferable technical solution of the present invention, a sponge rubber strip is disposed on a contact surface between the rectangular rabbet and the fitting plate unit.
In the structure, the sponge rubber strip is arranged on the inner surface, in the lateral soil blocking column, in contact with the assembly plate unit, so that the collision and angle drop of the assembly type unit in the hoisting process is prevented.
As a preferable technical scheme of the invention, an everted opening ring beam is arranged at an opening of the second assembling plate, and the opening ring beam is provided with a bolt through hole and is detachably connected with a retaining plate embedded with a nut through a bolt.
In the structure, the second assembling plate for shield starting is provided with the everted tunnel portal ring beam at the tunnel portal, so that the structural stability of the open tunnel structure under the action of soil pressure is ensured. And the second assembling plate for starting the shield is provided with a bolt through hole, and is connected with the soil retaining plate of the embedded nut through a bolt, so that the second assembling plate is convenient to dismantle after the earth is filled.
As a preferred technical scheme of the invention, the inner diameter of the opening ring beam and the diameter of the retaining plate are both larger than the diameter of the opening reserved for shield launching, so that the retaining plate can cover the opening.
In the above structure, the inner diameter of the opening ring beam and the diameter of the retaining plate should be larger than the opening reserved for shield launching, so as to prevent fine-grained soil from leaking out of the gap between the retaining plate and the opening.
As a preferable technical scheme of the invention, the thickness of the retaining plate is larger than that of the opening ring beam, so that the retaining plate is ensured to protrude out of the outer surface of the opening ring beam.
As a preferable technical solution of the present invention, the soil guard plate is provided with a hook.
In the structure, the thickness of the retaining plate is ensured to be capable of protruding out of the surface of the ring beam at the opening, so that two exposed steel bar lifting hooks can be arranged for lifting and dismounting.
In a second aspect, the present invention further provides a testing method for an assembled model slot apparatus for an indoor shield tunneling test, including the following steps:
1) calculating the required number of the assembly plates according to the thickness of the covering soil, and ensuring that the total height of the side wall formed by stacking the first assembly plate and the second assembly plate needs to meet the requirement of the thickness of the covering soil;
2) arranging the stacking sequence of the first assembling plate and the second assembling plate according to the position of the shield tunneling;
3) before the device is installed, the second assembling plate and the soil retaining plate are connected in advance by bolts;
4) sequentially hoisting and assembling by adopting a factory crane or a crane to form a model groove main body;
5) filling earthwork in the installed model groove, constructing an existing building model affected by tunneling, and installing a monitoring instrument;
6) the crane is connected with the steel bar lifting hook on the soil retaining plate, the bolt is unscrewed, and the soil retaining plate is lifted and removed.
7) And the shield tunneling starts from the opened hole, and the test is completed.
It is another object of the invention to provide a method of using the apparatus: when the invention is used for testing, firstly, the second assembling plate and the retaining plate are ensured to be connected by adopting bolts in advance. The required number of the assembly units is determined according to the working condition, the stacking sequence of the assembly units is determined according to the shield tunneling position, and a factory crane or a crane is adopted for sequential hoisting and assembly. And then filling earth in the installed model groove and installing a monitoring instrument. Before the shield tunneling, a crane is connected with a steel bar lifting hook, a bolt is unscrewed, and the soil blocking plate is lifted and removed. Next, the shield is driven from the open portal and the test is completed.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the invention makes a great adjustment to the common bearing structure system in the assembly type mold groove, so that the lateral soil pressure is finally borne by a few upright posts, and the method of a thin panel and a dense stiffening bar is avoided, thereby providing conditions for reserving an opening on the prefabricated part with a variable position.
According to the invention, the shield tunneling space position is changed by changing the stacking sequence of the assembly plate units, and the assembly plate units can be directly lifted and placed and installed by an in-plant crane or a small crane, so that the complex splicing work is avoided.
The assembling plate unit specially arranged for shield tunneling can better block the reserved hole for the shield in the soil filling process, and the structural stability of the assembling plate unit is ensured through the outwards-turned hole ring beam. After filling soil, the circular plate for plugging the hole is easy to remove, and an excavation surface is provided for the subsequent shield tunneling.
Drawings
FIG. 1 is a schematic view of a mold slot configuration of the present invention;
FIG. 2 is a schematic structural diagram of an outer corner post and an inner corner post according to the present invention;
FIG. 3 is a schematic structural view of the center pillar according to the present invention;
FIG. 4 is a schematic structural view of a first mounting plate according to the present invention;
FIG. 5 is a schematic cross-sectional view of a first mounting plate according to the present invention;
FIG. 6 is an exploded view of the first mounting plate and the retaining plate according to the present invention;
fig. 7 is a schematic cross-sectional view illustrating the first mounting plate and the retaining plate according to the present invention after they are mounted.
Reference numerals: 1-a bottom plate; 2-lateral soil blocking columns; 3-assembling a plate unit; 4-a soil retaining plate; 5-a hook; 6-bolt; 21-a center pillar; 22-corner outer columns; 23-angle inner post; 31-a first assembly plate; 32-a second mounting plate; 41-a nut; 201-rectangular rabbet; 301, forming an opening; 302-tenon; 303-a mortise; 304-an opening ring beam; 3001-a groove; 3002 bolt through hole.
Detailed Description
In order that those skilled in the art will better understand the technical solutions of the present invention, the following description of the preferred embodiments of the present invention is provided in conjunction with specific examples, but it should be understood that the drawings are for illustrative purposes only and should not be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.
As shown in fig. 1 to 7, the fabricated model tunnel device for the indoor shield tunneling test includes a bottom plate 1 formed by integrally casting reinforced concrete and a lateral soil blocking column 2 fixedly disposed above the bottom plate 1, which are integrally cast to ensure steel bar anchoring. The area of the cross section of the lateral soil blocking column 2 perpendicular to the length direction of the lateral soil blocking column increases gradually from top to bottom. The lateral retaining columns 2 comprise a plurality of middle columns 21, corner outer columns 22 and corner inner columns 23, and rectangular rabbets 201 connected with the assembly plate units 3 in an embedded mode are arranged between the corner outer columns 22 and the corner inner columns 23 and on the middle columns 21. The middle upright post 21 and the corner outer upright post 22 of the lateral baffle post 2 are preferably provided with sections with small upper parts and large lower parts, and the specific size is determined by structural calculation. The corner inner posts 23 of the lateral retaining posts 2 are L-shaped and may form with the corner outer posts 22 a rectangular rabbet 201 for fixing the assembly plate unit 3. Sponge rubber strips are adhered to the rectangular rabbet 201 for protection.
The assembling plate unit 3 comprises a plurality of strip-shaped first assembling plates 31 which are detachably connected and the stacking sequence of which is variable, and a second assembling plate 32 used for starting a model shield, and the first assembling plates 31 and the second assembling plates 32 are both embedded and fixedly connected with the lateral blocking columns 2, so that a mold groove is formed between the assembling plate unit 3 and the bottom plate 1 and between the assembling plate unit and the lateral blocking columns 2 in a surrounding manner; the upper and lower terminal surfaces of first assembly plate 31 and second assembly plate 32 are provided with tenon 302 and mortise 303 of looks adaptation respectively, set up two reinforcing bar lifting hooks 5 that are used for lifting by crane on the tenon surface, just all seted up in the mortise 303 and held the recess 3001 of lifting hook 5 to it has the sponge rubber strip to paste.
The fabricated unit 3 for shield initiation is left in the opening 301 according to the required size of the shield. An everted opening ring beam 304 is arranged at an opening of the second assembling plate 32, and 4 bolt through holes 3002 are formed in the opening ring beam 304 and detachably connected with a retaining plate 4 with a nut 41 embedded therein through bolts 6. The inner diameter of the opening ring beam 304 and the diameter of the retaining plate 4 are both larger than the diameter of the opening 301 reserved for shield launching, so that the retaining plate 4 can cover the opening.
Correspondingly, the retaining plate 4 is detachably connected with the second assembling plate 32, is matched with the hole 301 formed in the second assembling plate 32, and is used for a shield tunneling test from the openable hole 301; the inner diameter of the detachable retaining plate 4 is matched with the inner diameter of the opening ring beam 304, four embedded nuts 41 are arranged in bolt holes, and bolts 6 can be adopted to be connected with the retaining plate 4. The thickness of the retaining plate 4 is larger than that of the opening ring beam 304, so that the retaining plate 4 is ensured to protrude out of the outer surface of the opening ring beam 304, and the reinforcing steel bar lifting hook 5 is conveniently arranged on the retaining plate 4 for lifting.
When the invention is used for testing, firstly, the assembling plate unit 3 and the retaining plate 4 are ensured to be connected by bolts in advance. The required number of the assembly units is determined according to the working condition, the stacking sequence of the assembly units is determined according to the shield tunneling position, and a factory crane or a crane is adopted for sequential hoisting and assembly. And then filling earth in the installed model groove and installing a monitoring instrument. Before the shield tunneling, a crane is connected with a steel bar lifting hook 5, a bolt 6 is unscrewed, and the detachable retaining plate 4 is lifted and removed. Next, the shield is driven from the opened opening and the test is completed.
The invention also provides a test method of the assembled model slot device for the indoor shield tunneling test, which comprises the following steps:
1) calculating the required number of the assembling plates according to the thickness of the covering soil, and ensuring that the total height of the side wall formed by stacking the first assembling plate 31 and the second assembling plate 32 needs to meet the requirement of the thickness of the covering soil;
2) arranging the stacking sequence of the first assembling plate 31 and the second assembling plate 32 according to the position of the shield tunneling;
3) before the device is installed, the second assembling plate 32 and the retaining plate 4 are connected by bolts in advance;
4) sequentially hoisting and assembling by adopting a factory crane or a crane to form a model groove main body;
5) filling earthwork in the installed model groove, constructing an existing building model affected by tunneling, and installing a monitoring instrument;
6) firstly, the crane is connected with the lifting hook 5 on the retaining plate 4, the bolt 6 is unscrewed, and the retaining plate 4 is lifted and removed.
7) And the shield tunneling starts from the opened tunnel portal 301, and the test is completed.
The invention can flexibly adjust the position of shield tunneling, is convenient to disassemble and assemble, and is suitable for systematically researching the influence of shield tunneling on surrounding buildings.
According to the description and the drawings of the invention, the assembled model slot device for the indoor shield tunneling test can be easily manufactured or used by the skilled person, and the positive effects recorded by the invention can be generated.
Unless otherwise specified, in the present invention, if the terms "length", "width", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation and be operated, and therefore, the terms describing the orientation or positional relationship in the present invention are only used for illustrative purposes and are not to be construed as a limitation of the present patent, and it is possible for a person having ordinary skill in the art to understand the specific meaning of the above terms according to the specific situation with reference to the drawings.
Unless expressly stated or limited otherwise, the terms "disposed," "connected," and "connected" are used broadly and encompass, for example, being fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications and equivalent variations of the above embodiments according to the technical spirit of the present invention are included in the scope of the present invention.
Claims (10)
1. A assembled model groove device for indoor shield tunnelling is experimental, its characterized in that includes bottom plate (1) that is formed by reinforced concrete monolithic pouring and set firmly in side direction fender post (2) of bottom plate (1) top still includes:
the assembly plate unit (3) is embedded, fastened and connected with the lateral soil blocking column (2), comprises a plurality of strip-shaped first assembly plates (31) which are detachably connected and a second assembly plate (32) used for starting a model shield, and realizes that the upper and lower positions of the first assembly plates (31) and the second assembly plates (32) are adjustable through tenons (302) and tenons (303) which are respectively arranged on the upper end surfaces and the lower end surfaces of the first assembly plates (31) and the second assembly plates (32) and are matched with each other;
the lifting hooks (5) are respectively arranged on the tenons (302) of the first assembly plate (31) and the second assembly plate (32), are matched with the grooves (3001) formed in the tenons (303) of the adjacent assembly plates and are used for lifting and rapidly mounting or dismounting;
and the retaining plate (4) is detachably connected with the second assembling plate (32), is matched with the hole (301) formed in the second assembling plate (32), and is used for a shield tunneling test from the openable hole (301).
2. The fabricated model slot device for indoor shield tunneling test according to claim 1, wherein: and a sponge rubber strip is arranged on the contact surface between the tenon (302) and the mortise (303).
3. The fabricated model slot device for indoor shield tunneling test according to claim 1, wherein: the cross section area of the lateral soil blocking columns (2) perpendicular to the length direction of the lateral soil blocking columns is gradually increased from top to bottom.
4. The fabricated model slot device for indoor shield tunneling test according to claim 1, wherein: the lateral retaining column (2) comprises a plurality of middle columns (21), corner outer columns (22) and corner inner columns (23), and rectangular rabbets (201) connected with the assembly plate units (3) in an embedded mode are arranged between the corner outer columns (22) and the corner inner columns (23) and on the middle columns (21).
5. The fabricated model slot device for indoor shield tunneling test according to claim 5, wherein: and a sponge rubber strip is arranged on the contact surface of the rectangular rabbet (201) and the assembling plate unit (3).
6. The fabricated model slot device for indoor shield tunneling test according to claim 1, wherein: an everted opening ring beam (304) is arranged at an opening of the second assembling plate (32), a bolt through hole (3002) is formed in the opening ring beam (304), and the opening ring beam is detachably connected with a retaining plate (4) embedded with a nut (41) through a bolt (6).
7. The fabricated model slot device for indoor shield tunneling test according to claim 7, wherein: the inner diameter of the tunnel portal ring beam (304) and the diameter of the retaining plate (4) are both larger than the diameter of the tunnel portal (301) reserved for shield launching, and the retaining plate (4) is ensured to cover the tunnel portal.
8. The fabricated model slot device for indoor shield tunneling test according to claim 7, wherein: the thickness of the retaining plate (4) is larger than that of the opening ring beam (304), so that the retaining plate (4) is ensured to protrude out of the outer surface of the opening ring beam (304).
9. The fabricated model slot device for indoor shield tunneling test according to claim 8, wherein: and a lifting hook (5) is arranged on the soil retaining plate (4).
10. A test method of the fabricated model slot device for an indoor shield tunneling test according to any one of claims 1 to 9, comprising the steps of:
1) calculating the required number of the assembling plates according to the thickness of the covering soil, and ensuring that the total height of the side wall formed by stacking the first assembling plate (31) and the second assembling plate (32) needs to meet the requirement of the thickness of the covering soil;
2) arranging the stacking sequence of the first assembling plate (31) and the second assembling plate (32) according to the position of shield tunneling;
3) before the device is installed, the second assembling plate (32) and the soil retaining plate (4) are connected in advance by adopting bolts;
4) sequentially hoisting and assembling by adopting a factory crane or a crane to form a model groove main body;
5) filling earthwork in the installed model groove, constructing an existing building model affected by tunneling, and installing a monitoring instrument;
6) firstly, connecting a crane with a lifting hook (5) on a soil retaining plate (4), unscrewing a bolt (6), and lifting to remove the soil retaining plate (4);
7) and the shield tunneling starts from the opened hole (301), and the test is completed.
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| CN202010781024.0A CN114061992A (en) | 2020-08-06 | 2020-08-06 | Assembled model groove device for indoor shield tunneling test and test method thereof |
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| CN202010781024.0A CN114061992A (en) | 2020-08-06 | 2020-08-06 | Assembled model groove device for indoor shield tunneling test and test method thereof |
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| CN108414259A (en) * | 2018-03-11 | 2018-08-17 | 北京工业大学 | A kind of earth pressure balanced shield, EPBS model assay systems of achievable cutterhead and lining cutting pressure monitoring function |
| CN109060395A (en) * | 2018-08-27 | 2018-12-21 | 郑州大学 | The pilot system platform of excision composite foundation pile body is worn under a kind of shield |
| CN209384247U (en) * | 2018-12-17 | 2019-09-13 | 福州大学 | The assembling concrete sheet pile foundation pit supporting construction of included crown beam |
| CN109989760A (en) * | 2019-03-20 | 2019-07-09 | 中铁四局集团有限公司 | A kind of method of shield crossing ventilating shaft near a river |
| CN110530788A (en) * | 2019-09-23 | 2019-12-03 | 福州大学 | It is a kind of for setting up the experimental rig and working method of Shield Tunneling model |
| CN110593911A (en) * | 2019-10-08 | 2019-12-20 | 中铁第一勘察设计院集团有限公司 | Self-anchored shield tunnel reinforcing system without support rod pieces and construction method thereof |
| CN211148646U (en) * | 2019-12-04 | 2020-07-31 | 河北建设投资集团有限责任公司 | Combined type shallow tunnel excavation similar model test device |
| CN111122337A (en) * | 2020-01-07 | 2020-05-08 | 河海大学 | Segment soil pressure model test device and method considering shield tail wall post-grouting influence |
| CN213392161U (en) * | 2020-08-06 | 2021-06-08 | 中国电建集团华东勘测设计研究院有限公司 | Assembled model groove device for indoor shield tunneling test |
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