A 3D printed landslide physical model device and preparation method

Abstract

A landslide physical model device and preparation method based on 3D printing, comprising a model test box and a curved surface mold, wherein the curved surface mold is arranged inside the model test box and forms a cavity with the model test box, a feeding funnel is arranged on the curved surface mold, and the feeding funnel passes through the curved surface mold and is connected with the cavity, a discharge port is arranged on the side of the model test box, the curved surface mold and the model test box form a cavity, and the cavity is filled with similar materials, which is used to prepare a landslide physical model, and the curved surface mold adopts 3D printing technology, which has the advantages of simple preparation, low cost and high precision.

Description

Technical Field

[0001] The present invention relates to the field of geological disaster experiments, and in particular to a 3D printed landslide physical model device and a preparation method thereof. Background Art

[0002] Landslides occur under the control of geological environmental factors such as topography, geological structure, rock and soil characteristics, structural surface, groundwater action, etc., and are triggered by specific inducing factors. It is a complex physical phenomenon formed by the combined action of multiple factors. Physical model tests are an important method in the study of landslide formation mechanism because they can intuitively show the deformation and destruction process of landslides, comprehensively consider the effects of multiple external factors on landslides, and can be repeated many times.

[0003] At present, the construction of landslide physical models usually adopts a slope model with a single slope, or a thin two-dimensional physical model based on the main section of the landslide. However, a landslide is a three-dimensional entity with undulating terrain. A slope model with a single slope or a thin two-dimensional model is difficult to truly reflect the actual terrain of the landslide in three-dimensional space. The terrain is the most important factor controlling the stability of the landslide. Accurately simulating the terrain of the landslide area is an important means to improve the refinement of the physical model test.

[0004] Chinese patent CN106738192A "A method for 3D printing a landslide physical model and similar materials for landslide models" grinds similar materials into powder, places the similar materials in different nozzles of a 3D printer according to a certain ratio, and prints out the sliding body, sliding belt and sliding bed of the model according to the model to form a physical model of the landslide. The landslide physical model test requires that the model material should have similar characteristics of low strength, low elastic modulus and high bulk density. However, the types of materials that can be used by 3D printing technology are currently limited, and it is difficult to meet the simulation test requirements of landslides of different rock and soil types;

[0005] The main feature of 3D printing is dimensionality reduction manufacturing, which means decomposing a three-dimensional structured object into a two-dimensional layered structure and then accumulating layer by layer to form a three-dimensional object. This means that the 3D printed landslide model naturally has transversely anisotropic mechanical properties, but this is not necessarily the case in reality. At present, the price of 3D printing is relatively expensive, and directly printing the entire three-dimensional solid model of the landslide requires a large amount of capital, which makes it difficult to promote and apply. Summary of the invention

[0006] The main purpose of the present invention is to provide a 3D printed landslide physical model device and preparation method to solve the problem that the types of materials that can be used by 3D printing technology in constructing landslide models are greatly limited and it is difficult to meet the simulation test requirements of landslides of different rock and soil types.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is: a landslide physical model device based on 3D printing, including a model test box and a curved surface mold, the curved surface mold is arranged inside the model test box and forms a cavity with the model test box, the curved surface mold is provided with a feeding funnel, the feeding funnel passes through the curved surface mold and is connected with the cavity, and a discharge port is provided on the side of the model test box.

[0008] In a preferred embodiment, a water outlet pipe is provided on one side of the model test box, a nozzle bracket is provided on the model test box, a plurality of atomizing nozzles are provided on the nozzle bracket, and a water outlet of the water outlet pipe is connected to a water inlet of the nozzle bracket.

[0009] In the preferred embodiment, limiting devices are provided at both ends of the model test box, and a plurality of hanging rods are provided inside the limiting devices. Fixing belts are provided at both ends of the curved surface mold, and locking buckles are provided at both ends of the fixing belts. One end of the fixing belt is connected to the curved surface mold through the locking buckle, and the other end bypasses the upper opening of the model test box and is connected to the hanging rod of the limiting device.

[0010] In a preferred embodiment, the fixing belts at both ends of the curved surface mold are connected to the hanging rods at both ends of the mold test box and maintained at the same level.

[0011] The method comprises: 1) obtaining the spatial form of the landslide through GIS software and field survey data, determining the geometric size and spatial form of the prepared landslide physical model according to a ratio of 1:50-100, and then using 3D software to draw the surface elevation of the landslide physical model, the internal layer of the sliding body and the 3D curved surface mold data of the sliding bed according to the geometric size and spatial form;

[0012] 2) The multiple three-dimensional curved surface mold data in step 1) are printed out in a 3D printer using 3D printing materials. After the curved surface mold is printed, the two ends of the slider bed curved surface mold are first fixed in the model test box by fixing belts to form a cavity with the bottom of the model test box, and the model forming material is filled into the cavity through a feeding funnel;

[0013] 3) After filling, the filled material is compacted by mechanical pressure or heavy object pressure above the curved surface mold. After compaction, the curved surface mold is lifted to a level by a fixed belt and filled with similar materials again. This is done layer by layer until the slider bed curved surface mold reaches the designed height.

[0014] 4) Remove the curved surface mold, spray the sliding belt material directly on the landslide site and compact it, spray the bulk material or install electro-optical paper to make the sliding belt, and complete the production of the sliding belt;

[0015] 5) Use the internal layer of the sliding body or the surface elevation curved surface mold to fill and compact the sliding body material in the above manner to complete the production of the sliding body part, remove the curved surface mold, conduct the test according to the test plan, open the water outlet pipe, and spray a small amount of water from the water outlet pipe on the landslide position of the model to conduct landslide experiment monitoring. After the experiment is completed, the discharge port can be opened to discharge the filled material from the discharge port.

[0016] The present invention provides a 3D printed landslide physical model device and a preparation method. The 3D printing technology is used to draw the surface and internal lithology boundary plane of the geographical location range of the landslide using three-dimensional software, and a mold is prepared, which is then placed in a model test box. The cavity formed by the model test box is filled with similar materials. The three-dimensional spatial form and structure of the landslide can be accurately and quickly constructed, and at the same time, the basic physical properties can achieve similar requirements, and the preparation has the advantages of simple, low cost and high precision. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0018] Figure 1 It is a structural diagram of the model test box of the present invention;

[0019] Figure 2 It is a structural diagram of the filling material of the model test box of the present invention;

[0020] Figure 3 It is a structural diagram of the atomizing nozzle of the present invention;

[0021] Figure 4 It is a flow chart of the device for preparing a physical model of the present invention;

[0022] In the figure: a model test box 1; a limit device 2; a hanging rod 21; a curved surface mold 3; a fixing belt 4; a locking buckle 5; a feeding funnel 6; a water outlet pipe 7; a nozzle bracket 71; an atomizing nozzle 72; a discharge port 8; a sliding bed 9; a sliding belt 10; and a sliding body 11. DETAILED DESCRIPTION

[0023] Example 1

[0024] like Figures 1 to 4 As shown, a landslide physical model device based on 3D printing includes a model test box 1 and a curved mold 3. The curved mold 3 is arranged inside the model test box 1 and forms a cavity with the model test box 1. A feeding funnel 6 is provided on the curved mold 3. The feeding funnel 6 passes through the curved mold 3 and is connected to the cavity. A discharge port 8 is provided on the side of the model test box 1. With this structure, the curved mold 3 and the model test box 1 form a cavity. The filling material is added through the feeding funnel 6, and the cavity is filled with similar materials to prepare a landslide physical model.

[0025] A water outlet pipe 7 is provided on one side of the model test box 1. A nozzle bracket 71 is provided on the model test box 1. A plurality of atomizing nozzles 72 are provided on the nozzle bracket 71. The water outlet of the water outlet pipe 7 is connected to the water inlet of the nozzle bracket 71. With this structure, the atomizing nozzle 72 is used to simulate a humid climate. The nozzle bracket 71 is a detachable structure. Figure 3 shown.

[0026] In the preferred embodiment, limiting devices 2 are provided at both ends of the model test box 1, and a plurality of hanging rods 21 are provided inside the limiting devices 2. Fixing belts 4 are provided at both ends of the curved surface mold 3, and buckles 5 are provided at both ends of the fixing belts 4. One end of the fixing belt 4 is connected to the curved surface mold 3 through the buckle 5, and the other end bypasses the opening on the model test box 1 and is connected to the hanging rod 21 of the limiting device 2. With this structure, both ends of the curved surface mold 3 are hung on the limiting devices 2 provided at both ends of the model test box 1 through the fixing belts 4. After filling the material, the curved surface mold 3 is lifted to a level through the fixing belts 4, and filled with similar materials again, and compacted layer by layer until the slider bed curved surface mold 3 reaches the designed height.

[0027] In the preferred embodiment, the fixing belts 4 at both ends of the curved mold 3 are connected to the hanging rods 21 at both ends of the test box to maintain the same level, ensuring that each lift is at the same level and also used to control the placement height of the curved mold.

[0028] Example 2

[0029] Further illustrate with reference to Example 1, Figures 1 to 3 As shown, the spatial morphology of the landslide is obtained through GIS software and field survey data, and the geometric size and spatial morphology of the prepared landslide physical model are determined according to the ratio of 1:50~100. Then, the surface elevation of the landslide physical model, the internal layer of the sliding body and the three-dimensional curved surface mold 3 data of the sliding bed surface are drawn using three-dimensional software according to the geometric size and spatial morphology.

[0030] The data of the multiple three-dimensional curved surface molds 3 in the above steps are printed out in a 3D printer using 3D printing materials. After the printing of the curved surface mold 3 is completed, the two ends of the slider bed curved surface mold 3 are first fixed in the model test box 1 through fixing belts 4 to form a cavity with the bottom of the model test box 1, and the model molding material is filled into the cavity through the feeding funnel 6. The molding material is any material whose physical and mechanical properties meet the test requirements.

[0031] After filling, the filled material is compacted by mechanical pressure or heavy pressure on the curved mold 3. After compaction, the curved mold 3 is lifted to a level by the fixing belt 4 and filled with similar materials again. The compaction is carried out layer by layer until the slider bed curved mold 3 reaches the designed height.

[0032] Remove the curved surface mold 3, spray the sliding belt 10 material directly on the landslide site and compact it, spray the bulk material or install electro-optical paper to make the sliding belt 10, complete the production of the sliding belt 10, use the internal layer of the sliding body 11 or the surface elevation curved surface mold, fill and compact the sliding body 11 material in the same way, complete the production of the sliding body 11 part, remove the curved surface mold, and conduct the test according to the test plan.

[0033] The water outlet pipe 7 is opened to spray a small amount of water from the water outlet pipe 7 on the landslide position of the model to carry out landslide experiment monitoring. After the experiment is completed, the discharge port 8 can be opened to discharge the filled material from the discharge port 8.

[0034] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limiting the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A method for preparing a landslide physical model device based on 3D printing, characterized in that: The invention comprises a model test box (1) and a curved surface mold (3), wherein the curved surface mold (3) is arranged inside the model test box (1) and forms a cavity with the model test box (1), a feeding funnel (6) is arranged on the curved surface mold (3), and the feeding funnel (6) passes through the curved surface mold (3) and communicates with the cavity, and a discharge port (8) is arranged on the side of the model test box (1); A water outlet pipe (7) is provided on one side of the model test box (1); a nozzle bracket (71) is provided on the model test box (1); a plurality of atomizing nozzles (72) are provided on the nozzle bracket (71); and a water outlet of the water outlet pipe (7) is connected to a water inlet of the nozzle bracket (71); The model test box (1) is provided with a limit device (2) at both ends, and a plurality of hanging rods (21) are provided inside the limit device (2). The curved surface mold (3) is provided with a fixing belt (4) at both ends, and a lock buckle (5) is provided at both ends of the fixing belt (4). One end of the fixing belt (4) is connected to the curved surface mold (3) through the lock buckle (5), and the other end of the fixing belt (4) bypasses the upper opening of the model test box (1) and is connected to the hanging rod (21) of the limit device (2); The fixing belts (4) at both ends of the curved surface mold (3) are connected to the hanging rods (21) at both ends of the model test box and maintained at the same level; The method includes: 1) The spatial morphology of the landslide is obtained through GIS software and field survey data, and the geometric dimensions and spatial morphology of the prepared landslide physical model are determined at a scale of 1:50-100. Then, the surface elevation, internal layer of the sliding body, and three-dimensional curved surface mold (3) data of the landslide physical model are drawn using three-dimensional software according to the geometric dimensions and spatial morphology; 2) The data of the plurality of three-dimensional curved surface molds (3) in step 1) are printed out in a 3D printer using 3D printing materials. After the curved surface mold (3) is printed, the two ends of the slider bed curved surface mold (3) are first fixed in the model test box (1) through fixing belts (4) to form a cavity with the bottom of the model test box (1), and the model forming material is filled into the cavity through a feeding funnel (6); 3) After the filling is completed, the filled material is compacted by mechanical pressure or heavy object pressure above the curved surface mold (3). After compaction, the curved surface mold (3) is lifted to a higher level by a fixing belt (4) and filled with similar material again, and the compaction is repeated layer by layer until the slider bed curved surface mold (3) reaches the designed height; 4) removing the slider bed curved surface mold (3), spraying the slide belt (10) material directly on the landslide site and compacting it, spraying the bulk material or installing electro-optical paper to make the slide belt (10), and completing the production of the slide belt (10); 5) Using the internal layer of the sliding body (11) or the curved surface mold of the surface elevation, the sliding body (11) material is stacked and compacted in the manner of the above steps to complete the production of the sliding body (11) part, and the curved surface mold is removed. The test is carried out according to the test plan, and the water outlet pipe (7) is opened to spray a small amount of water from the water outlet pipe (7) on the landslide position of the model to carry out landslide test monitoring. After the experiment is completed, the discharge port (8) can be opened to discharge the filled material from the discharge port (8).

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