CN107764609A - The preparation method of padded coaming test-bed high-pressure solid sector bentonite in lump - Google Patents

The preparation method of padded coaming test-bed high-pressure solid sector bentonite in lump Download PDF

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Publication number
CN107764609A
CN107764609A CN201610681484.XA CN201610681484A CN107764609A CN 107764609 A CN107764609 A CN 107764609A CN 201610681484 A CN201610681484 A CN 201610681484A CN 107764609 A CN107764609 A CN 107764609A
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Prior art keywords
bentonite
compacting
padded coaming
lump
load
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CN107764609B (en
Inventor
刘月妙
马利科
曹胜飞
王驹
宗自华
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Beijing Research Institute of Uranium Geology
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Beijing Research Institute of Uranium Geology
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising

Abstract

The invention belongs to padded coaming evaluation of long-term properties technical field, and in particular to a kind of preparation method of padded coaming test-bed high-pressure solid sector bentonite in lump；The technical problem to be solved in the present invention is：For prior art deficiency, a kind of preparation method of padded coaming test-bed high-pressure solid sector bentonite in lump is provided, the method that padded coaming test-bed high-pressure solid sector bentonite in lump is prepared using single shaft static pressure, it is homogeneous so as to which density can be prepared, dimensional discrepancy is smaller, and meets the high-pressure solid sector bentonite in lump of Deep Geological Disposal of High-level Radioactive Wastes storehouse padded coaming requirement；The technical scheme is that：Comprise the following steps：Step 1, compacting prepare；Step 2, Bit andits control compacting；Step 3, spatial load forecasting compacting；Step 4, second displacement control compacting；Step 5, it is compressing.

Description

The preparation method of padded coaming test-bed high-pressure solid sector bentonite in lump
Technical field
The invention belongs to padded coaming evaluation of long-term properties field, and in particular to a kind of padded coaming test-bed high-pressure solid The preparation method of fan-shaped bentonite in lump.
Background technology
Substantial amounts of high-pressure solid padded coaming is needed in Deep Geological Disposal of High-level Radioactive Wastes storehouse as important artificial barrier, by it It is placed between disposal rock mass and high-level waste package body, plays engineering barrier, hydraulics barrier, chemical barrier, conduction and lost put The important function such as injectivity waste decay heat, it is the important leverage of geological disposal storehouse safety and stability.In bentonite base person's character On the basis that can be studied, countries in the world scientist starts to prepare buffering backfilling material block brick, and to national high-level waste Dispose the research work that storehouse pre-selection bentonite carries out indoor and live large-scale experiment stand.
Preparing high-pressure solid swelling indigenous method in theory mainly has unidirectional, two-way, three-dimensional static(al) compacting, but according to existing equipment Technical merit, feasible method be unidirectional static(al) compacting.Carried out the research of padded coaming large-scale experiment stand in 2005 in China Work, has carried out largely to prepare substantial amounts of high-pressure solid sector bentonite in lump, China's researcher needed for test-bed Laboratory test, limited by various conditions, fail to propose a kind of preparation method for meeting test requirements document all the time.
Therefore, the present invention is exactly in this case, according to substantial amounts of laboratory test and test, to develop one kind and be based on position Shifting and load control manner, the side of padded coaming test-bed high-pressure solid sector bentonite in lump is prepared using single shaft static pressure Method, through Density Detection and dimensional measurement, the bentonite in lump even density prepared using this method is consistent, and dimensional discrepancy is smaller, can Meet the requirement of Deep Geological Disposal of High-level Radioactive Wastes storehouse padded coaming.
The content of the invention
The technical problem to be solved in the present invention is：One kind, which is provided, for above-mentioned problem is based on displacement and spatial load forecasting Mode, the method that padded coaming test-bed high-pressure solid sector bentonite in lump is prepared using single shaft static pressure, to prepare It is homogeneous to go out density, dimensional discrepancy is smaller, and meets that the high-pressure solid sector of Deep Geological Disposal of High-level Radioactive Wastes storehouse padded coaming requirement is swollen Moisten soil block.
The technical solution adopted in the present invention is：
A kind of preparation method of padded coaming test-bed high-pressure solid sector bentonite in lump, including step are as follows：
Step 1, compacting prepare；
Step 2, Bit andits control compacting；
Step 3, spatial load forecasting compacting；
Step 4, second displacement control compacting；
Step 5, it is compressing.
The step 1 compacting preparation comprises the following steps：
Step (1.1) presses predetermined dry density and volume, calculates and weighs the bentonite powder of respective quality, loads compacting Mould and pre-compacted, the height of setting compacting sample simultaneously carry out mark on mould.
Step (1.2), bentonitic compacting tool set will be installed on forcing press, make pressing disc on mould and forcing press Central point on same vertical line, guider is used between upper platen and mould, forcing press load is not less than 1000kN.
In the step 2 under displacement-control mode, start to suppress soil block with 5mm/min speed, limit target and be set to Load 130kN.
The step 3 comprises the following steps：
Step (3.1) after load reaches limited target value using load control manner compacting soil block, speed 1kN/s, Limit target and be set to load 450-850kN；
Step (3.2) load keeps load value constant after reaching setting value, continues to suppress, and limits target and is set to displacement, should Shift value can meet the requirement for height for preparing soil block.
In the step 4, after displacement reaches setting value, control mode is converted into Bit andits control, and keep shift value not Change continues to suppress, press time about 10~20min.
In the step 5, terminate compacting, forcing press is unloaded, axial displacement is retracted into zero point, is taken out compressing Soil sample, measure and record the basic parameters such as size and the weight of soil block.
Padded coaming test-bed high-pressure solid sector bentonite in lump, its outer radius are 250~400mm, inside radius is 90~ 250mm, it is highly 40~60mm, angle is 30 °~60 °, density 1.6-1.8g/cm3。
This method is based on displacement and load control manner, and padded coaming test-bed high pressure is prepared using single shaft static pressure The method of real fan-shaped bentonite in lump, described forcing press are microcomputer controlled electro-hydraulic servo mechanics machine, and its load mode is single To static(al), ensure that compacting overall process produces without surge, and the central point of pressing disc hangs down in same on mould and forcing press On straight line.
The beneficial effects of the invention are as follows：
1. the method for the invention is that synthesis uses displacement and load control manner, and is preparing the process of bentonite in lump Middle realize switches without impact, and then realization prepares padded coaming test-bed high-pressure solid sector bentonite in lump；
2. through Density Detection and dimensional measurement, the bentonite in lump even density prepared using this method is consistent, dimensional discrepancy It is smaller, the requirement of Deep Geological Disposal of High-level Radioactive Wastes storehouse padded coaming can be met；
3. using Bit andits control pressing mode, the gas in scattered soil can quickly be discharged；
4. can produce its soil block particle using low rate pressing mode to align, even density is consistent；
5. using Bit andits control and keeping shift value constant, the resilience of high-pressure solid bentonite in lump can be effectively reduced, is ensured Soil sample dimensional discrepancy is smaller, meets padded coaming engineering property test requirements document.
Brief description of the drawings
Fig. 1 is the high-pressure solid sector bentonite in lump prepared using the method for the invention.
Embodiment
Displacement and load control manner are based on to one kind provided by the present invention below, prepared using single shaft static pressure high The method for being compacted fan-shaped bentonite in lump is described in further detail.
Step 1, compacting prepare；
Step 2, Bit andits control compacting；
Step 3, spatial load forecasting compacting；
Step 4, second displacement control compacting；
Step 5, it is compressing.
The step 1 compacting preparation comprises the following steps：
Step (1.1) presses predetermined dry density and volume, calculates and weighs the bentonite powder of respective quality, loads compacting Mould and pre-compacted, the height of setting compacting sample simultaneously carry out mark on mould.
Step (1.2), bentonitic compacting tool set will be installed on forcing press, make pressing disc on mould and forcing press Central point on same vertical line, guider is used between upper platen and mould, forcing press load is not less than 1000kN.
In the step 2 under displacement-control mode, start to suppress soil block with 5mm/min speed, limit target and be set to Load 130kN.
The step 3 comprises the following steps：
Step (3.1) after load reaches limited target value using load control manner compacting soil block, speed 1kN/s, Limit target and be set to load 450-850kN；
Step (3.2) load keeps load value constant after reaching setting value, continues to suppress, and limits target and is set to displacement, should Shift value can meet the requirement for height for preparing soil block.
In the step 4, after displacement reaches setting value, control mode is converted into Bit andits control, and keep shift value not Change continues to suppress, press time about 10~20min.
In the step 5, terminate compacting, forcing press is unloaded, axial displacement is retracted into zero point, is taken out compressing Soil sample, measure and record the basic parameters such as size and the weight of soil block.
Padded coaming test-bed high-pressure solid sector bentonite in lump, its outer radius are 250~400mm, inside radius is 90~ 250mm, it is highly 40~60mm, angle is 30 °~60 °, density 1.6-1.8g/cm3。
This method is based on displacement and load control manner, and padded coaming test-bed high pressure is prepared using single shaft static pressure The method of real fan-shaped bentonite in lump, described forcing press are microcomputer controlled electro-hydraulic servo mechanics machine, and its load mode is single To static(al), ensure that compacting overall process produces without surge, and the central point of pressing disc hangs down in same on mould and forcing press On straight line.
Embodiment 1
(1) predetermined dry density and volume are pressed, calculates and weighs the bentonite powder of respective quality, loads compacting tool set simultaneously Pre-compacted, the height of setting compacting sample simultaneously carry out mark on mould.The outer radius of bentonite in lump prepared by this example is 250mm, inside radius 90mm, it is highly 40mm, angle is 30 degree, dry density 1.6g/cm3。
(2) bentonitic compacting tool set will be installed on forcing press, make the center of pressing disc on mould and forcing press Put on same vertical line, i.e. the line of three-core one, guider is used between upper platen and mould.Forcing press is that microcomputer controls servo Rock mechanics experiment machine, forcing press load are not less than 1000kN, can be achieved without impact switching displacement and load control manner.
(3) first under displacement-control mode, start to suppress soil block with 5mm/min speed, limit target and be set to load 130kN。
(4) mesh, is limited at speed 2kN/s using load control manner compacting soil block after load reaches limited target value Mark is set to load 450kN.
(5) load keeps load value constant after reaching setting value, continues to suppress, and limits target and is set to displacement, the shift value The requirement for height for preparing soil block can be met.
(6) after displacement reaches setting value, control mode is converted into Bit andits control, and keeps shift value is constant to continue to press System, press time about 10~20min.
(7) terminate compacting, forcing press is unloaded, axial displacement is retracted into zero point, take out compressing soil sample, measurement is simultaneously Record the basic parameters such as size and the weight of soil block.
(8) but the embodiment of the present invention is the foregoing is only, is not used for limiting the scope that the present invention is implemented.I.e. All equivalent changes and modifications done according to the present invention, are all that the scope of the claims of the present invention is covered.
Embodiment 2
(1) predetermined dry density and volume are pressed, calculates and weighs the bentonite powder of respective quality, loads compacting tool set simultaneously Pre-compacted, the height of setting compacting sample simultaneously carry out mark on mould.The outer radius of bentonite in lump prepared by this example is 300mm, inside radius 165mm, it is highly 50mm, angle is 45 degree, dry density 1.7g/cm3。
(2) bentonitic compacting tool set will be installed on forcing press, make the center of pressing disc on mould and forcing press Put on same vertical line, i.e. the line of three-core one, guider is used between upper platen and mould.Forcing press is that microcomputer controls servo Rock mechanics experiment machine, forcing press load are not less than 1000kN, can be achieved without impact switching displacement and load control manner.
(3) first under displacement-control mode, start to suppress soil block with 5mm/min speed, limit target and be set to load 130kN。
(4) mesh, is limited at speed 2kN/s using load control manner compacting soil block after load reaches limited target value Mark is set to load 600kN.
(5) load keeps load value constant after reaching setting value, continues to suppress, and limits target and is set to displacement, the shift value The requirement for height for preparing soil block can be met.
(6) after displacement reaches setting value, control mode is converted into Bit andits control, and keeps shift value is constant to continue to press System, press time about 10~20min.
(7) terminate compacting, forcing press is unloaded, axial displacement is retracted into zero point, take out compressing soil sample, measurement is simultaneously Record the basic parameters such as size and the weight of soil block.
(8) but the embodiment of the present invention is the foregoing is only, is not used for limiting the scope that the present invention is implemented.I.e. All equivalent changes and modifications done according to the present invention, are all that the scope of the claims of the present invention is covered.
Embodiment 3
(1) predetermined dry density and volume are pressed, calculates and weighs the bentonite powder of respective quality, loads compacting tool set simultaneously Pre-compacted, the height of setting compacting sample simultaneously carry out mark on mould.The outer radius of bentonite in lump prepared by this example is 400mm, inside radius 250mm, it is highly 60mm, angle is 60 degree, dry density 1.8g/cm3。
(2) bentonitic compacting tool set will be installed on forcing press, make the center of pressing disc on mould and forcing press Put on same vertical line, i.e. the line of three-core one, guider is used between upper platen and mould.Forcing press is that microcomputer controls servo Rock mechanics experiment machine, forcing press load are not less than 1000kN, can be achieved without impact switching displacement and load control manner.
(3) first under displacement-control mode, start to suppress soil block with 5mm/min speed, limit target and be set to load 130kN。
(4) mesh, is limited at speed 2kN/s using load control manner compacting soil block after load reaches limited target value Mark is set to load 850kN.
(5) load keeps load value constant after reaching setting value, continues to suppress, and limits target and is set to displacement, the shift value The requirement for height for preparing soil block can be met.
(6) after displacement reaches setting value, control mode is converted into Bit andits control, and keeps shift value is constant to continue to press System, press time about 10~20min.
(7) terminate compacting, forcing press is unloaded, axial displacement is retracted into zero point, take out compressing soil sample, measurement is simultaneously Record the basic parameters such as size and the weight of soil block.
(8) but the embodiment of the present invention is the foregoing is only, is not used for limiting the scope that the present invention is implemented.I.e. All equivalent changes and modifications done according to the present invention, are all that the scope of the claims of the present invention is covered.

Claims (8)

  1. A kind of 1. preparation method of padded coaming test-bed high-pressure solid sector bentonite in lump, it is characterised in that：Including step such as Under：
    Step 1, compacting prepare；
    Step 2, Bit andits control compacting；
    Step 3, spatial load forecasting compacting；
    Step 4, second displacement control compacting；
    Step 5, it is compressing.
  2. 2. a kind of preparation method of padded coaming test-bed high-pressure solid sector bentonite in lump according to claim 1, its It is characterised by：The step 1 compacting preparation comprises the following steps：
    Step (1.1) presses predetermined dry density and volume, calculates and weighs the bentonite powder of respective quality, loads compacting tool set And pre-compacted, the height of setting compacting sample simultaneously carry out mark on mould.
    Step (1.2), bentonitic compacting tool set will be installed on forcing press, made on mould and forcing press in pressing disc Heart point uses guider on same vertical line between upper platen and mould, forcing press load is not less than 1000kN.
  3. 3. a kind of preparation method of padded coaming test-bed high-pressure solid sector bentonite in lump according to claim 1, its It is characterised by：In the step 2 under displacement-control mode, start to suppress soil block with 5mm/min speed, limit target and set For load 130kN.
  4. 4. a kind of preparation method of padded coaming test-bed high-pressure solid sector bentonite in lump according to claim 1, its It is characterised by：The step 3 comprises the following steps：
    Step (3.1), using load control manner compacting soil block, speed 1kN/s, limits after load reaches limited target value Target is set to load 450-850kN；
    Step (3.2) load keeps load value constant after reaching setting value, continues to suppress, and limits target and is set to displacement, the displacement Value can meet the requirement for height for preparing soil block.
  5. 5. a kind of preparation method of padded coaming test-bed high-pressure solid sector bentonite in lump according to claim 1, its It is characterised by：In the step 4, after displacement reaches setting value, control mode is converted into Bit andits control, and keep shift value It is constant to continue to suppress, press time about 10~20min.
  6. 6. a kind of preparation method of padded coaming test-bed high-pressure solid sector bentonite in lump according to claim 1, its It is characterised by：
    In the step 5, terminate compacting, forcing press unloaded, axial displacement is retracted into zero point, takes out compressing soil sample, Measure and record the basic parameters such as size and the weight of soil block.
  7. 7. a kind of preparation method of padded coaming test-bed high-pressure solid sector bentonite in lump according to claim 1, its It is characterised by：Padded coaming test-bed high-pressure solid sector bentonite in lump, its outer radius are 250~400mm, inside radius is 90~ 250mm, it is highly 40~60mm, angle is 30 °~60 °, density 1.6-1.8g/cm3。
  8. 8. a kind of preparation method of padded coaming test-bed high-pressure solid sector bentonite in lump according to claim 1, its It is characterised by：This method is based on displacement and load control manner, and padded coaming test-bed height is prepared using single shaft static pressure The method of fan-shaped bentonite in lump is compacted, described forcing press is microcomputer controlled electro-hydraulic servo mechanics machine, and its load mode is Unidirectional static(al), ensure compacting overall process without surge produce, and on mould and forcing press pressing disc central point in same On vertical line.
CN201610681484.XA 2016-08-17 2016-08-17 Preparation method of high-compaction fan-shaped bentonite block of buffer material test bench Active CN107764609B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112776125A (en) * 2020-12-25 2021-05-11 核工业北京地质研究院 Preparation method of meter-scale buffer material fan-shaped building block

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CN1583384A (en) * 2004-06-03 2005-02-23 西北农林科技大学 Preparing method of precast solidified soil blocks
CN101101241A (en) * 2007-07-20 2008-01-09 浙江大学 Original soft clay hollow cylinder sample manufacture method
CN101887763A (en) * 2009-05-14 2010-11-17 核工业北京地质研究院 System of simulating characteristics of high-level waste geology treatment room
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112776125A (en) * 2020-12-25 2021-05-11 核工业北京地质研究院 Preparation method of meter-scale buffer material fan-shaped building block
CN112776125B (en) * 2020-12-25 2022-12-20 核工业北京地质研究院 Preparation method of meter-scale buffer material fan-shaped building block

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