CN110653932A - Concrete shaft model making device and using method - Google Patents

Concrete shaft model making device and using method Download PDF

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Publication number
CN110653932A
CN110653932A CN201910936500.9A CN201910936500A CN110653932A CN 110653932 A CN110653932 A CN 110653932A CN 201910936500 A CN201910936500 A CN 201910936500A CN 110653932 A CN110653932 A CN 110653932A
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CN
China
Prior art keywords
cylinder
outer cylinder
cylinder body
wall
inner cylinder
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Pending
Application number
CN201910936500.9A
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Chinese (zh)
Inventor
张黎明
丛宇
孙泽宁
田永泽
王在泉
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Qingdao University of Technology
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Qingdao University of Technology
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Application filed by Qingdao University of Technology filed Critical Qingdao University of Technology
Priority to CN201910936500.9A priority Critical patent/CN110653932A/en
Publication of CN110653932A publication Critical patent/CN110653932A/en
Priority to PCT/CN2020/112274 priority patent/WO2021057388A1/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B21/00—Methods or machines specially adapted for the production of tubular articles
    • B28B21/76—Moulds
    • B28B21/82—Moulds built-up from several parts; Multiple moulds; Moulds with adjustable parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B21/00—Methods or machines specially adapted for the production of tubular articles
    • B28B21/86—Cores
    • B28B21/88—Cores adjustable, collapsible or expansible
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/38—Treating surfaces of moulds, cores, or mandrels to prevent sticking
    • B28B7/384—Treating agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/38—Treating surfaces of moulds, cores, or mandrels to prevent sticking
    • B28B7/388—Treating surfaces of moulds, cores, or mandrels to prevent sticking with liquid material, e.g. lubricating

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)

Abstract

The invention discloses a concrete shaft model manufacturing device and a using method, which solve the problems of easy model damage, easy slurry leakage and inaccurate centering position caused by mold removal in the prior art, and have the effects of simple operation, accurate centering, no slurry leakage and high mold removal success rate; the technical scheme is as follows: the device comprises an outer cylinder body and an inner cylinder body which are sleeved together, wherein a cavity with an annular cross section is formed between the outer cylinder body and the inner cylinder body, two ends of the cavity are respectively connected with a special sleeve, and the end parts of the outer cylinder body and the inner cylinder body are sealed through the special sleeves; the outer cylinder body is provided with a plurality of mounting seams with set length along the axial direction, and a buckle structure is arranged at the positions of the mounting seams; the inner barrel body is composed of a plurality of sections of barrel bodies which are detachably connected, and a supporting structure is arranged inside each adjacent barrel body.

Description

Concrete shaft model making device and using method
Technical Field
The invention relates to the technical field of coal mine vertical shaft shafts, in particular to a concrete vertical shaft model manufacturing device and a using method.
Background
The coal mine shaft is used as a core channel for connecting production and safety, and the safety state of the coal mine shaft is always the focus of attention of a coal mine. Wherein, the concrete shaft of the area with a plurality of deep punching and laminating areas in south China, north China, Xuzhou and Yanzhou areas have non-mining damage in turn. The damaged shaft has vertical fracturing characteristic, the cage guide seam is compacted, the concrete surface layer is peeled off, and the shaft has no obvious horizontal dislocation, distortion and inclination. The damage to the shaft threatens the life safety of coal mine workers and causes huge economic loss to the coal mine. The bottom of the concrete well casing in the deep-drawing lamination area is located on the bedrock, and the problem of foundation settlement does not exist. Water of a fourth series aquifer is caused to seep into the goaf by mining activities and industrial and agricultural water, soil of the bottom aquifer is solidified and compressed to deform, an overlying soil layer is then settled and deformed, the soil layer and a shaft rub with each other to generate downward negative friction force, and the friction force is increased along with the increase of the solidified and compressed amount of the soil layer.
Currently, while scholars have progressively recognized that increasing vertical negative friction may cause wellbore damage, they have not been able to accurately answer when a wellbore damage has occurred. The inventor finds that a scholars researches the deformation damage process of the concrete well casing by adopting a numerical simulation method, so that the understanding of the damage mechanism of the well casing is promoted, but the numerical simulation result is lack of experimental verification. The actual depth of the concrete shaft of the coal mine is hundreds of meters, and the test is not practical by adopting the concrete shaft with the real size, so that the size of the shaft needs to be reduced in proportion to carry out the similar model test of the shaft. The device for manufacturing the similar model of the shaft has been reported, because the height of the similar model of the shaft exceeds 1m, and the thickness of the similar model of the shaft often does not exceed 5cm, the height and the thickness of the shaft are extremely inconsistent, and further the shaft model is very difficult to manufacture and demold. However, the existing manufacturing device has the defects of complex manufacturing process, inaccurate centering position, serious slurry leakage and slurry leakage problems, sticking of the mold and the model together, damage of the model caused by mold removal, low success rate of mold removal and the like.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a concrete shaft model making device and a using method thereof, which have the effects of simple operation, accurate centering, no slurry leakage and high mold stripping success rate.
The invention adopts the following technical scheme:
a concrete shaft model manufacturing device comprises an outer cylinder body and an inner cylinder body which are sleeved together, wherein a cavity with an annular cross section is formed between the outer cylinder body and the inner cylinder body, two ends of the cavity are respectively connected with a special sleeve, and the end parts of the outer cylinder body and the inner cylinder body are sealed through the special sleeve;
the outer cylinder body is provided with a plurality of mounting seams with set length along the axial direction, and a buckle structure is arranged at the positions of the mounting seams; the inner barrel body is composed of a plurality of sections of barrel bodies which are detachably connected, and a supporting structure is arranged inside each adjacent barrel body.
Furthermore, the special sleeve consists of a first cylinder and a second cylinder which have different diameters, the second cylinder is fixed at one end of the first cylinder, and the other end of the first cylinder is sealed after pouring is finished.
Further, the outer diameter of the second cylinder is equal to the inner diameter of the poured shaft, and the inner diameter of the first cylinder is equal to the outer diameter of the poured shaft.
Furthermore, the buckle structure comprises a buckle seat fixed with the mounting seam and a connecting rib inserted in the buckle seat.
Furthermore, the supporting structure comprises a cross, and the end part of the cross is fixedly connected with the inner cylinder body through an arc-shaped connecting piece.
Furthermore, the cylinder bodies of the inner cylinder body are connected end to end through V-shaped grooves.
Furthermore, the inner wall and the outer wall of the outer cylinder body are both pasted with traceless adhesive tapes, and the outer wall of the outer cylinder body is provided with a steel hoop.
Furthermore, the outer cylinder body is made of polytetrafluoroethylene materials, and the inner cylinder body is made of wood materials.
The use method of the concrete vertical shaft well casing model making device comprises the following steps:
processing an outer cylinder body: processing an installation seam along the axis of the outer cylinder by using an angle grinder, and uniformly arranging buckle structures along two sides of the installation seam;
attaching a traceless adhesive tape to the inner wall and the outer wall of the outer cylinder body, and reinforcing the traceless adhesive tape to the outer side of the outer cylinder body by using a steel hoop;
processing an inner cylinder body: clamping a plurality of cylinder bodies together, and mounting a cross inside each cylinder body;
pre-coating a release agent on the inner wall of the outer cylinder and the outer wall of the inner cylinder (coating vaseline on the inner wall of the outer cylinder and coating epoxy resin on the outer wall of the inner cylinder), and standing for a set time;
the inner cylinder and the outer cylinder are clamped into the bottom special sleeve in the same direction, and the inner cylinder and the outer cylinder are clamped into the top special sleeve after pouring is completed.
Compared with the prior art, the invention has the beneficial effects that:
(1) the two ends of the inner cylinder body and the outer cylinder body are connected with the special sleeves, so that the stability of the model can be maintained; the outer cylinder body is provided with a mounting seam, a buckle structure is arranged at the position of the mounting seam, and when the mold is removed, only the connecting rib of the buckle structure needs to be pulled out from the upper part, and the buckle seat is opened to separate the inner wall and the outer wall of the shaft model, so that the mold removal difficulty is greatly reduced, and the success rate of the mold after mold removal is improved;
(2) the traceless adhesive tape is adhered to the inner wall and the outer wall of the outer cylinder body, the thickness of the traceless adhesive tape is almost zero, so that the influence on a model can be ignored, and the outer wall of the outer cylinder body is transversely restrained by the steel hoop so as to prevent the traceless adhesive tape from being leaked due to overlarge pressure;
(3) the inner cylinder body is a prefabricated wooden thin-wall cylinder, mainly resists extrusion force generated during pouring, and can avoid inward seepage by utilizing the hardness of a high-quality thin-wall wooden cylinder pipe and the resistance of an internal wooden cross;
(4) the inner cylinder and the outer cylinder are clamped into the bottom special sleeve in the same direction, the relative position of the bottoms of the inner cylinder and the outer cylinder is fixed at the same time except for the seepage-proofing function, and the inner cylinder and the outer cylinder are clamped into the top special sleeve after pouring is finished, so that the thickness of the well wall can be well determined, and the problem that the thickness of the well wall is inconsistent due to various reasons on the inner wall in the solidification period is solved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is a top view of a first embodiment of the present invention;
FIG. 2 is a partial view of a first embodiment of the present invention;
FIG. 3 is a partial cross-sectional view of a first embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a special sleeve according to a first embodiment of the present invention;
FIG. 5 is a cross-sectional view of a tailored sleeve according to a first embodiment of the invention;
FIG. 6 is a schematic structural view of a drainage device according to a first embodiment of the present invention;
the device comprises an outer barrel body 1, an inner barrel body 2, an inner barrel body 3, an arc-shaped connecting piece 4, a connecting rib 5, a cross 6, a special sleeve 7, a first cylinder 8 and a second cylinder.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
for convenience of description, the words "up", "down", "left" and "right" in this application, if any, merely indicate correspondence with the directions of up, down, left and right of the drawings themselves, and do not limit the structure, but merely facilitate the description of the invention and simplify the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the application.
The terms "mounted", "connected", "fixed", and the like in the present application should be understood broadly, and for example, the terms "mounted", "connected", and "fixed" may be fixedly connected, detachably connected, or integrated; the two components can be connected mechanically or electrically, directly or indirectly through an intermediate medium, or connected internally or in an interaction relationship, and the terms used in the present invention should be understood as having specific meanings to those skilled in the art.
As introduced by the background art, the defects that the mold stripping easily causes the damage of the model, the slurry leakage easily occurs and the centering position is inaccurate exist in the prior art, and the invention provides the concrete shaft model manufacturing device and the using method in order to solve the technical problems.
The first embodiment is as follows:
the present invention is described in detail below with reference to fig. 1 to 5, and specifically, the structure is as follows:
the embodiment provides a concrete shaft model manufacturing device, which is suitable for manufacturing shafts with most similar materials, heights and thicknesses and comprises an outer cylinder body 1, an inner cylinder body 2, a specially-made sleeve 6 and a supporting structure, wherein the inner cylinder body 2 is sleeved inside the outer cylinder body 1, the difference value between the inner diameter of the outer cylinder body 1 and the outer diameter of the inner cylinder body 2 is the wall thickness of a well, and a pouring shaft is formed between the inner cylinder body 2 and the outer cylinder body 1 after pouring; the special sleeves 6 are arranged at the two ends of the outer cylinder body 1 and the inner cylinder body 2, and the supporting structure is arranged inside the inner cylinder body 2.
In consideration of cost and reusability, the outer cylinder 1 of the present embodiment is made of teflon, and the inner cylinder 2 is a wooden thin-walled cylinder. The outer cylinder body 1 is provided with a plurality of installation seams which are distributed at intervals along the axial direction and have set length so as to avoid the expansion of the outer cylinder body 1, and the installation seams are formed by adopting an angle grinder. In this embodiment, the length of the installation seam accounts for 90% of the height of the outer cylinder 1, and the installation seam is the same as the distance between the upper surface and the lower surface of the outer cylinder 1.
A plurality of buckle structures are uniformly arranged on each mounting seam, and the outer cylinder body 1 is fixed through the buckle structures. Further, buckle structure includes buckle seat and splice bar 4, and the buckle seat is the metal paster of trompil, and the metal paster sets up in groups, and two metal pasters of every group are symmetrical about the installation seam, and the one end of metal paster is fixed with outer barrel 1, and the other end is unsettled, and the free end of metal paster has the trompil that corresponds from top to bottom.
The connecting ribs 4 penetrate through the metal patch holes of each group of the same mounting seam in the vertical direction to play a role of buckling. In this embodiment, the tie bars 4 are steel bars. When the mold is removed, the upper part of the connecting rib 4 can be drawn out, and the inner wall and the outer wall of the shaft model are separated by opening the buckle seat, so that the mold removal difficulty is greatly reduced, and the success rate of the model after mold removal is improved. Compared with a clamping groove type semicircular shell which is specially manufactured, the manufacturing process difficulty is reduced, and meanwhile, the manufacturing time and the material cost of waiting materials are reduced.
Because the cutting blade of angle mill itself has certain thickness, and outer barrel 1 can't be closed completely after the cutting, in order to prevent the seepage, it has no trace sticky tape to paste at the inside and outside wall of outer barrel 1, and the outside installation hoop of outer barrel 1 exerts horizontal restraint to cause too big pressure to no trace sticky tape, lead to the seepage.
Interior barrel 2 comprises the barrel that the connection can be dismantled by the multistage, and the barrel tip sets up V type groove, and adjacent barrel passes through V type groove mutual block and is in the same place, and the barrel single-end that is located the tip sets up V type groove, and the barrel both ends that are located the centre all set up V type groove, adjacent barrel hookup location installation bearing structure. In this embodiment, four barrels are used to plug together, and three support structures are provided inside the barrels. It will be appreciated that in other embodiments, the number of cylinders may be selected according to the actual requirements.
The supporting structure comprises a cross 5 and arc-shaped connecting pieces 3, the four end parts of the cross 5 are respectively connected with the arc-shaped connecting pieces 3, the arc-shaped connecting pieces 3 are fixedly connected with the inner wall of the inner barrel 2, the radian of the arc-shaped connecting pieces 3 is adapted to the inner wall of the inner barrel 2, and the cross 5 is matched to form stable support. The inner cylinder body 2 mainly resists extrusion force generated during pouring, and inward seepage can be avoided by utilizing the hardness of the high-quality thin-wall wooden cylinder pipe and the resistance of the wooden cross 5 inside.
The special sleeve 6 is composed of a first cylinder 7 and a second cylinder 8 which are different in diameter, the diameter of the first cylinder 7 is larger than that of the second cylinder 8, the second cylinder 8 is fixed to one end of the first cylinder 7 through an annular connecting plate, the other end of the first cylinder 7 is sealed through a circular plate, and the first cylinder 7 is sealed after pouring is completed. The second cylinder 8 has an outer diameter equal to the inner diameter of the cast wellbore and the first cylinder 7 has an inner diameter equal to the outer diameter of the cast wellbore. In order to maintain the stability of the device, the circular plate size of the special sleeve 6 installed at the bottom of the inner cylinder 2 and the outer cylinder 1 may be larger than the diameter of the first cylinder 7.
The use method of the concrete shaft model manufacturing device comprises the following steps:
processing an outer cylinder body: an angle grinder is adopted to process a mounting seam along the axis of the outer cylinder body 1, and buckle structures are uniformly arranged along the two sides of the mounting seam.
Traceless adhesive tapes are attached to the inner wall and the outer wall of the outer cylinder body 1 and are fixed to the outer side of the outer cylinder body 1 through steel hoops.
Processing an inner cylinder body: the cylinders are snapped together and a cross 5 is mounted inside the cylinders.
Uniformly coating a release agent on the inner wall of the outer cylinder body 1 and the outer wall of the inner cylinder body 2 in advance, standing until the release agent is not in a flowable liquid state any more, and then assembling; wherein, under the condition of guaranteeing the effect, tried many release agents, conventional oil application scheme effect is not good to oil can permeate in the thick liquid and influence model intensity, finally according to the affinity test of on-the-spot concrete and many release agent materials, this example scribbles vaseline on outer barrel 1 inner wall, scribbles epoxy on inner barrel 2 outer wall.
The inner cylinder and the outer cylinder are clamped into the bottom special sleeve 6 in the same direction, and the bottom special sleeve 6 can fix the relative positions of the bottoms of the inner cylinder 2 and the outer cylinder 1 besides the anti-seepage function. In order to reduce the problem that when pouring is carried out, due to the fact that too much materials need to be poured and the fact that a pouring opening is too small, a large amount of materials are wasted, a shaft cannot be poured at one time, layering occurs, or material proportioning caused by mixing for multiple times is different, and the overall test result is poor, a drainage device is adopted for assisting pouring.
The drainage device comprises a solid cylinder arranged on the inner layer and a drainage cylinder arranged on the outer layer, the lower end of the drainage cylinder is a cylinder with the same inner diameter as the outer cylinder, the upper end of the drainage cylinder is a cylinder with a diameter large enough (determined according to actual pouring amount), and the drainage cylinder and the outer cylinder are connected into a whole through a conical inclined plane. The solid cylinder of inlayer has avoided the material to flow from the inner wall centre, and the diameter of pouring the material has been enlarged to the drainage tube, has greatly increased the speed of pouring, has reduced extravagant material.
After pouring is finished, the inner cylinder body 2 and the outer cylinder body 1 are clamped into the specially-made sleeve 6 at the top to determine the thickness of the well wall, and the problem that the thickness of the well wall is inconsistent due to various reasons of the inner wall in the solidification period is solved.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. A concrete shaft model making device is characterized by comprising an outer cylinder and an inner cylinder which are sleeved together, wherein a cavity with an annular cross section is formed between the outer cylinder and the inner cylinder, two ends of the cavity are respectively connected with a special sleeve, and the end parts of the outer cylinder and the inner cylinder are sealed through the special sleeve;
the outer cylinder body is provided with a plurality of mounting seams with set length along the axial direction, and a buckle structure is arranged at the positions of the mounting seams; the inner barrel body is composed of a plurality of sections of barrel bodies which are detachably connected, and a supporting structure is arranged inside each adjacent barrel body.
2. The apparatus of claim 1, wherein the special sleeve comprises a first cylinder and a second cylinder with different diameters, the second cylinder is fixed to one end of the first cylinder, and the other end of the first cylinder is closed after casting.
3. The concrete shaft well bore modeling apparatus of claim 2, wherein said second cylinder has an outer diameter equal to the inner diameter of the cast well bore and said first cylinder has an inner diameter equal to the outer diameter of the cast well bore.
4. The apparatus of claim 1, wherein the fastener comprises a fastener seat fixed to the mounting slot, and a connecting rib inserted into the fastener seat.
5. The concrete shaft well bore modeling apparatus of claim 1, wherein said support structure includes a cross, the ends of said cross being fixedly connected to the inner barrel by arcuate connectors.
6. The concrete shaft well bore modeling apparatus of claim 1, wherein said inner cylinder has cylinders connected end to end by V-grooves.
7. The apparatus of claim 1, wherein the traceless adhesive tape is attached to both the inner and outer walls of the outer cylinder, and the steel hoop is provided on the outer wall of the outer cylinder.
8. The concrete shaft well bore modeling apparatus of claim 1, wherein said outer cylinder is made of teflon and said inner cylinder is made of wood.
9. Use of a concrete shaft well bore modelling device according to any one of claims 1 to 8 including the steps of:
processing an outer cylinder body: processing an installation seam along the axis of the outer cylinder by using an angle grinder, and uniformly arranging buckle structures along two sides of the installation seam;
attaching a traceless adhesive tape to the inner wall and the outer wall of the outer cylinder body, and reinforcing the traceless adhesive tape to the outer side of the outer cylinder body by using a steel hoop;
processing an inner cylinder body: clamping a plurality of cylinder bodies together, and mounting a cross inside each cylinder body;
coating a release agent on the inner wall of the outer cylinder and the outer wall of the inner cylinder in advance, and standing for a set time;
the inner cylinder and the outer cylinder are clamped into the bottom special sleeve in the same direction, and the inner cylinder and the outer cylinder are clamped into the top special sleeve after pouring is completed.
10. The method of manufacturing a concrete shaft mold making apparatus as claimed in claim 9, wherein vaseline is applied to an inner wall of the outer cylinder and epoxy resin is applied to an outer wall of the inner cylinder.
CN201910936500.9A 2019-09-29 2019-09-29 Concrete shaft model making device and using method Pending CN110653932A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201910936500.9A CN110653932A (en) 2019-09-29 2019-09-29 Concrete shaft model making device and using method
PCT/CN2020/112274 WO2021057388A1 (en) 2019-09-29 2020-08-28 Apparatus for fabricating concrete shaft wellbore model and usage method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910936500.9A CN110653932A (en) 2019-09-29 2019-09-29 Concrete shaft model making device and using method

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WO (1) WO2021057388A1 (en)

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WO2021057388A1 (en) * 2019-09-29 2021-04-01 青岛理工大学 Apparatus for fabricating concrete shaft wellbore model and usage method
CN114683395A (en) * 2022-04-18 2022-07-01 兰州理工大学 Modular circular PC well chamber prefabricated template and construction assembling and disassembling method
CN114743448A (en) * 2022-04-29 2022-07-12 山东大学 Model body manufacturing device and method for reserved cavern in geomechanical model test

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Cited By (4)

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Publication number Priority date Publication date Assignee Title
WO2021057388A1 (en) * 2019-09-29 2021-04-01 青岛理工大学 Apparatus for fabricating concrete shaft wellbore model and usage method
CN114683395A (en) * 2022-04-18 2022-07-01 兰州理工大学 Modular circular PC well chamber prefabricated template and construction assembling and disassembling method
CN114683395B (en) * 2022-04-18 2023-10-03 兰州理工大学 Modularized circular PC well chamber prefabricated formwork and construction assembling and dismantling method
CN114743448A (en) * 2022-04-29 2022-07-12 山东大学 Model body manufacturing device and method for reserved cavern in geomechanical model test

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