CN107702939B - Large undisturbed loess model preparation method - Google Patents
Large undisturbed loess model preparation method Download PDFInfo
- Publication number
- CN107702939B CN107702939B CN201710942172.4A CN201710942172A CN107702939B CN 107702939 B CN107702939 B CN 107702939B CN 201710942172 A CN201710942172 A CN 201710942172A CN 107702939 B CN107702939 B CN 107702939B
- Authority
- CN
- China
- Prior art keywords
- model
- steel
- bearing platform
- soil body
- steel plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000002360 preparation method Methods 0.000 title abstract description 8
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 90
- 239000010959 steel Substances 0.000 claims abstract description 90
- 239000002689 soil Substances 0.000 claims abstract description 56
- 239000002984 plastic foam Substances 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 5
- 239000002390 adhesive tape Substances 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005527 soil sampling Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/04—Devices for withdrawing samples in the solid state, e.g. by cutting
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a large undisturbed loess model preparation method, which comprises the steps of processing a soil model, fixing the soil model by using a plastic foam plate, reserving a certain distance at the bottom, sleeving a model box on the soil model, filling and compacting gaps between the rear of the model box and the rear of the soil model by loess; placing steel rails close to two sides of a model box, placing a steel plate bearing platform on the steel rails, arranging a convex pushing component at the front edge of the steel plate bearing platform, clamping upright plates at two sides on the steel rails, sawing the bottom of a soil body model by using a steel saw, and pushing the steel plate bearing platform by using a digging machine while sawing so that soil body falls on the steel plate bearing platform; lifting the model soil body to an automobile by using a lifting appliance, connecting a steel wire rope with a lifting ring of the model box after the model soil body is transported indoors, and adjusting the model box to enable the whole soil body model to be completely displayed. The invention has the beneficial effects that the large loess sample can be obtained under the condition of not damaging the soil structure, thereby meeting the experimental requirements.
Description
Technical Field
The invention belongs to the technical field of geotechnical engineering, and relates to a large undisturbed loess model preparation method.
Background
As special soil, loess has the characteristics of weak cementation and low strength, the taking and preparation of a large undisturbed loess model is a worldwide problem in the geotechnical engineering field all the time, and is restricted by loess characteristics and the prior art conditions, scientific researchers at various universities at present replace the loess model by remolded soil models or take and prepare smaller undisturbed loess models, the taking and preparation method is also a five-flower eight door, and only the undisturbed loess models with the length and width of 1m multiplied by 1m can be taken and prepared at present, so the current situation greatly restricts the research work of the loess in the geotechnical engineering field.
Disclosure of Invention
The invention aims to provide a large undisturbed loess model preparation method, which solves the problem that the loess sample is smaller and cannot meet the experimental requirement due to the characteristics of weak cementation and low strength in the prior art.
The invention relates to a preparation method of a large undisturbed loess model, which comprises the following steps:
step 1: firstly leveling a field, sampling two sides of a soil body, and excavating working areas front and back;
step 2: processing the soil body model, namely processing front, back, left, right and upper top surfaces of the soil body model to be smooth, and connecting the bottom of the soil body model with raw soil;
step 3: fixing the periphery of the processed soil body model by using a plastic foam plate, reserving a certain distance at the bottom, wrapping the plastic foam plate by using an adhesive tape, sleeving a model box on the soil body model, wherein the model box is a cuboid without a top surface and a bottom surface, keeping the front of the model box clinging to the front of the soil body model, and filling and compacting gaps between the rear of the model box and the rear of the soil body model by using loess;
step 4: placing steel rails close to two sides of the model box, and fixing the steel rails on the ground by steel nails;
step 5: the steel plate bearing platform is placed on the steel rail, the steel plate bearing platform is rectangular, a protruding pushing component is arranged at the front edge of the steel plate bearing platform, vertical plates on two sides of the steel plate bearing platform are clamped on the steel rail, when the pushing component is stressed, the steel plate bearing platform slides on the steel rail, bearing platform lifting rings are arranged at four corners of the steel plate bearing platform, and the bearing platform lifting rings are located outside the vertical plates; the hacksaw comprises a strip-shaped square steel, a saw blade is welded on one side of the strip-shaped square steel, and handles are arranged at two ends of the strip-shaped square steel; sawing the bottom of the soil body model by using a hacksaw, and pushing the steel plate bearing platform by using a digging machine while sawing so that the soil body falls on the steel plate bearing platform;
step 6: lifting the model soil body to an automobile by using a lifting appliance, wherein the lifting appliance consists of a frame body and a steel wire rope, one end of the steel wire rope is connected with the frame body, the other end of the steel wire rope is connected with a bearing platform lifting ring on a steel plate bearing platform, the steel wire rope is connected with a model box lifting ring after being transported indoors, and the model box is adjusted to be separated, so that the whole soil body model is completely presented.
Further, the front part of the saw blade forms an included angle of 45 degrees with the square steel, and the rear part forms an included angle of 135 degrees with the square steel.
Further, the width of the cutting edge of the saw blade is the same as the thickness of the steel plate bearing platform.
The invention has the beneficial effects that the large loess sample can be obtained under the condition of not damaging the soil structure, thereby meeting the experimental requirements.
Drawings
FIG. 1 is a schematic diagram of a model box structure;
FIG. 2 is a schematic view of a soil model placed on a steel plate bearing platform;
FIG. 3 is a schematic view of a hacksaw;
FIG. 4 is a schematic view of lifting a lifting appliance;
fig. 5 is a schematic view of the bottom of a steel plate bearing platform insert model box.
In the figure, a model box 1, a steel plate bearing platform 2, steel rails 3, a steel saw 4, a lifting appliance 5, a model box lifting ring 101, a propelling part 201, a vertical plate 202, a bearing platform lifting ring 203, a strip-shaped square steel 401, a saw blade 403, a handle 501, a frame body 502 and a steel wire rope.
Detailed Description
The present invention will be described in detail with reference to the following embodiments.
As shown in figures 1 to 5, the invention firstly levels the site on the selected site by using the digging machine so as to facilitate construction operation, and digs out working areas with the width of about 0.8 meter at the two sides of the sampled soil body, the length is 6-8 m, and the height is 1-2.6 m. And processing soil models on the soil sampling site, wherein the front, back, left, right and upper top surfaces are processed smoothly, and the bottom is connected with original soil. Fixing the periphery of the processed soil body model by using a plastic foam plate, keeping a certain distance from the bottom of the soil body model to 4-6 mm, and wrapping the plastic foam plate by using an adhesive tape. The model box 1 is sleeved on the soil body model, the model box 1 is a cuboid without a top surface and a bottom surface, model box hanging rings 101 are arranged at four corners of the top of the model box 1, the front of the model box 1 is kept to be clung to the front of the soil body model, and gaps between the rear of the model box 1 and the rear of the soil body model are filled with loess and compacted. The loess is filled so that the soil model can give enough reaction force to the model box 1 in the pushing process of the steel plate bearing platform 2, and the soil model is prevented from being sheared off later. Model box hanging rings 101 are arranged at four corners of the top of the model box 1.
The steel rail 3 is placed in parallel close to the two sides of the model box 1, and the steel rail 3 is fixed on the ground by steel nails.
The steel plate bearing platform 2 is placed on the steel rail 3, the steel plate bearing platform 2 is rectangular, the front edge is provided with a convex pushing component 201, and the vertical plates 202 on two sides of the steel plate bearing platform 2 are clamped on the steel rail to prevent the steel plate bearing platform 2 from deflecting when being pushed. The four corners of the steel plate bearing platform 2 are provided with bearing platform lifting rings 203, and the bearing platform lifting rings 203 are positioned outside the vertical plates 202; the hacksaw 4 comprises a strip-shaped square steel 401, a saw blade 402 is welded on one side of the strip-shaped square steel 401, the front part of the saw blade 402 forms an included angle of 45 degrees with the square steel 401, and the rear part forms an included angle of 135 degrees with the square steel 401. Handles 403 are arranged at two ends of the strip-shaped square steel 401; the bottom of the soil body model is sawed by a hacksaw 4, and the steel plate bearing platform 2 is pushed by a digging machine while sawing, so that the soil body falls on the steel plate bearing platform 2.
The model soil body is hoisted to an automobile by using a lifting appliance 5, the lifting appliance 5 consists of a frame body 501 and a steel wire rope 502, one end of the steel wire rope is connected with the frame body 501, the other end of the steel wire rope is connected with a bearing platform lifting ring 203 on a steel plate bearing platform 2, the steel wire rope 502 is connected with the model box lifting ring 101 after being transported indoors, and the model box 1 is adjusted to enable the whole soil body model to be completely presented.
The invention has the advantages that the method can completely prepare large undisturbed loess with length, width and height of 2m multiplied by 1.1m multiplied by 1m, saves time and labor in the soil sampling process, saves labor, can furthest reserve undisturbed soil samples, does not damage soil structures, and can meet the research needs of loess engineering.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the invention in any way, and any simple modification, equivalent variation and modification made to the above embodiments according to the technical substance of the present invention falls within the scope of the technical solution of the present invention.
Claims (2)
1. A method for preparing a large undisturbed loess model is characterized by comprising the following steps:
step 1: firstly leveling a field, sampling two sides of a soil body, and excavating working areas front and back;
step 2: processing the soil body model, namely processing front, back, left, right and upper top surfaces of the soil body model to be smooth, and connecting the bottom of the soil body model with raw soil;
step 3: fixing the periphery of the processed soil body model by using a plastic foam plate, reserving a certain distance at the bottom, wrapping the plastic foam plate by using an adhesive tape, sleeving a model box on the soil body model, wherein the model box is a cuboid without a top surface and a bottom surface, keeping the front of the model box clinging to the front of the soil body model, and filling and compacting gaps between the rear of the model box and the rear of the soil body model by using loess;
step 4: placing steel rails close to two sides of the model box, and fixing the steel rails on the ground by steel nails;
step 5: the steel plate bearing platform is placed on the steel rail, the steel plate bearing platform is rectangular, a protruding pushing component is arranged at the front edge of the steel plate bearing platform, vertical plates on two sides of the steel plate bearing platform are clamped on the steel rail, when the pushing component is stressed, the steel plate bearing platform slides on the steel rail, bearing platform lifting rings are arranged at four corners of the steel plate bearing platform, and the bearing platform lifting rings are located outside the vertical plates; the steel saw comprises a strip-shaped square steel, a saw blade is welded on one side of the strip-shaped square steel, the front part of the saw blade forms an included angle of 45 degrees with the square steel, the rear part forms an included angle of 135 degrees with the square steel, and handles are arranged at two ends of the strip-shaped square steel; sawing the bottom of the soil body model by using a hacksaw, and pushing the steel plate bearing platform by using a digging machine while sawing so that the soil body falls on the steel plate bearing platform;
step 6: lifting the model soil body to an automobile by using a lifting appliance, wherein the lifting appliance consists of a frame body and a steel wire rope, one end of the steel wire rope is connected with the frame body, the other end of the steel wire rope is connected with a bearing platform lifting ring on a steel plate bearing platform, the steel wire rope is connected with a model box lifting ring after being transported indoors, and the model box is adjusted to be separated, so that the whole soil body model is completely presented.
2. The method for preparing a large undisturbed loess model as set forth in claim 1, wherein: the width of the cutting edge of the saw blade is the same as the thickness of the steel plate bearing platform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710942172.4A CN107702939B (en) | 2017-10-11 | 2017-10-11 | Large undisturbed loess model preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710942172.4A CN107702939B (en) | 2017-10-11 | 2017-10-11 | Large undisturbed loess model preparation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107702939A CN107702939A (en) | 2018-02-16 |
| CN107702939B true CN107702939B (en) | 2024-02-20 |
Family
ID=61183571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710942172.4A Active CN107702939B (en) | 2017-10-11 | 2017-10-11 | Large undisturbed loess model preparation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107702939B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112663589A (en) * | 2021-01-13 | 2021-04-16 | 南京工业大学 | Large-size sample sampling device for undisturbed soil at bottom of foundation pit and using method thereof |
| CN113237691B (en) * | 2021-05-08 | 2022-04-15 | 西安建筑科技大学 | Structural undisturbed soil sampling device and sampling method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110076390A (en) * | 2009-12-29 | 2011-07-06 | 거산산업주식회사 | Manufacturing device for yellow soil panel |
| CN202002818U (en) * | 2011-03-25 | 2011-10-05 | 中国科学院桃源农业生态试验站 | Large undisturbed-soil sampling equipment |
| CN204374010U (en) * | 2014-12-25 | 2015-06-03 | 西南交通大学 | A kind of top-loaded system of shaking table lamination shear test soil case |
| CN106978824A (en) * | 2017-03-09 | 2017-07-25 | 大连理工大学 | A kind of soil body preparation device of simulated sea bottom complex slope and preparation method thereof |
-
2017
- 2017-10-11 CN CN201710942172.4A patent/CN107702939B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110076390A (en) * | 2009-12-29 | 2011-07-06 | 거산산업주식회사 | Manufacturing device for yellow soil panel |
| CN202002818U (en) * | 2011-03-25 | 2011-10-05 | 中国科学院桃源农业生态试验站 | Large undisturbed-soil sampling equipment |
| CN204374010U (en) * | 2014-12-25 | 2015-06-03 | 西南交通大学 | A kind of top-loaded system of shaking table lamination shear test soil case |
| CN106978824A (en) * | 2017-03-09 | 2017-07-25 | 大连理工大学 | A kind of soil body preparation device of simulated sea bottom complex slope and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 悬挂式层状多向剪切变形模型箱的研制;李霞;许成顺;杜修力;;地震工程与工程振动;20160215(第01期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107702939A (en) | 2018-02-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107702939B (en) | Large undisturbed loess model preparation method | |
| CN104215469A (en) | Specimen box of sandy soil monolith, and apparatus and method for preparing monolith | |
| CN102854046B (en) | Device and method for preparing undisturbed soil sample of ring cutter | |
| CN109752211A (en) | A kind of lime-soil compaction pile sampler and method | |
| CN204894175U (en) | Precast concrete reinforcing bar side stake mould | |
| CN106639305B (en) | Slidable lifting type constructional column steel formwork and construction method thereof | |
| CN107916823A (en) | A kind of electric pole aids in fixing bracket | |
| CN204125952U (en) | The outfitting tool of bank protection Cast-in-place concrete construction | |
| CN203798639U (en) | Device for preparing compaction soil sample in geotechnical test | |
| CN211439831U (en) | Multipurpose auxiliary drilling device | |
| CN213015403U (en) | Adjustable pin-connected panel L type side form steel form | |
| CN212956496U (en) | Soft soil foundation treatment structure | |
| CN211415672U (en) | Flat pile extruder | |
| CN210152287U (en) | Multifunctional floor split heads | |
| CN203808082U (en) | Slope-cast planting eco-concrete anti-overflow device | |
| CN203226099U (en) | Novel convenient pedal type seedling lifter | |
| CN211080227U (en) | Auxiliary device for piling machinery | |
| CN203133066U (en) | Large-scale compactor hammering system | |
| CN207634087U (en) | A kind of tamping equipment for tunnel vault lining cutting | |
| CN105064430A (en) | Miniature soil excavator for engineering | |
| CN203219768U (en) | Cylindrical plant lifter | |
| CN206205457U (en) | A kind of steel reinforcement cage aids in colligation frame | |
| CN203365201U (en) | Movable type multifunctional on-site rock mass test piece preparation device | |
| CN212030984U (en) | Ring cutter taking-out device | |
| CN113463661B (en) | Slope fixing method for construction deep foundation pit support |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |