CN102384885A - Tool for detecting pulp stability of prestress grouting and use method thereof - Google Patents
Tool for detecting pulp stability of prestress grouting and use method thereof Download PDFInfo
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- CN102384885A CN102384885A CN2011102986543A CN201110298654A CN102384885A CN 102384885 A CN102384885 A CN 102384885A CN 2011102986543 A CN2011102986543 A CN 2011102986543A CN 201110298654 A CN201110298654 A CN 201110298654A CN 102384885 A CN102384885 A CN 102384885A
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Abstract
The invention discloses a tool for detecting the pulp stability of prestress grouting, which comprises a large measuring cylinder, an upper grouting small measuring cylinder and a lower grouting small measuring cylinder, wherein the upper grouting small measuring cylinder and the lower grouting small measuring cylinder have the same shape, the same size and the same volume, the volume of the large measuring cylinder is greater than the sum of the volumes of the upper grouting small measuring cylinder and the lower grouting small measuring cylinder, a pulp overflowing hole is arranged on the wall of the large measuring cylinder nearby a top opening, a pulp discharge hole is arranged at the bottom of the large measuring cylinder in a position with a half distance from the pulp overflowing hole, and the pulp discharge hole is provided with a hole plugging plug. A use method of the tool comprises four steps of: grouting still standing, grouting delamination, grouting density ratio measurement and grouting deposition flowing ratio measurement. The weight and the flowing speed of the still standing prestress hole passage grouting after the delamination are respectively measured to obtain the density ratio and the deposition flowing ratio of the prestress hole passage grouting at the upper layer and the lower layer, and the stable performance of the pulp can be objectively and accurately evaluated through analyzing the density ratio and the deposition flowing ratio of the prestress hole passage grouting.
Description
Technical field
The present invention relates to a kind of building checkout equipment and method of application thereof, relate to instrument and method of application thereof that a kind of slurries stability indicator that is used for the bridge back-tension prestressed channel mudjacking detects specifically.
Background technology
In construction works such as bridge; A large amount of post tentioned prestressed concrete girder plates of using; And the main effect of post-tensioned prestressing hole path pressure grouting is to prevent effective Stress Transfer between presstressed reinforcing steel corrosion and presstressed reinforcing steel and the concrete component; Closely related with the permanance of beam slab, therefore, it is particularly important that the fullness degree of mud jacking just seems.Current, the size performance that influences the mud jacking fullness degree is mainly bleeding rate and expansivity binomial index.
Have now and mainly adopt the graduated cylinder method to come the Qinshui rate of prestress mud jacking is measured, at first in graduated cylinder, fill out the filling mud jacking, note the height of slurries face the detection of size performance; Leave standstill after covering completely and measure its separating water water surface and grout expanding noodles after 3-24 hour again; But, be difficult to draw a clear line of demarcation, simultaneously because the water of secreting out is muddy; Wherein mind-set is recessed under capillary effect to secrete the water that, and makes the numerical value and the out of true of reading; The testing goal of bleeding rate is in order to estimate the suspension stability of solid particle such as cement in the slurries; But measuring means, existing bleeding rate can not accomplish this point, if, also can't get rid of the problem whether slurries deposit because do not observe the slurry surface excreting water phenomenon; In addition; Because the time of leaving standstill is longer, and a part of bleeding is vapored away, and has influenced testing result.
Adopt the graduated cylinder method that the expansivity of prestress mud jacking is measured simultaneously, same reason, because the performance of existing prestress mud jacking is become better and better, its expansivity is also minimum; Have only a few percent even ppt, and the reading of organic glass graduated cylinder is unit with the millimeter, is easy to generate very big reading error like this; Simultaneously, when slurries inject graduated cylinder, because capillary action; Can on barrel, form concave surface, and scale is on barrel, causes and accurately to observe the variation of expanding.
Can find it is that the bleeding rate or the mensuration of expansivity all exist many uncertain factors from above-mentioned present situation, cause the result who measures inaccurate.
Summary of the invention
To above-mentioned defective, the present invention aims to provide a kind of simple to operate, testing result science and judge the testing tool and the method for application thereof of prestress mud jacking stability accurately more that has.
For achieving the above object; The technical scheme that the present invention adopts is: a kind of testing tool of prestress mud jacking slurries stability; Comprise on a big graduated cylinder of cylindrical shape, the cylindrical shape under the little graduated cylinder of mud jacking and the cylindrical shape mud jacking tube in a small amount; The said little graduated cylinder of mud jacking of going up is identical with shape, size and the volume of following mud jacking a small amount of tube, and the volume of said big graduated cylinder has an excessive slurry hole near top open part greater than little graduated cylinder of last mud jacking and following mud jacking a small amount of tube volume sum on the wall of said big graduated cylinder; The bottom of said big graduated cylinder and half place of starching distance between the hole of overflowing have a blowing hole, and said blowing hole has a hole plug.
The volume of said big graduated cylinder is 5 ± 5% liters; The said volume of going up little graduated cylinder of mud jacking and following mud jacking a small amount of tube is 2 ± 5% liters; The diameter in said blowing hole is 16 ± 10% millimeters; The height of said big graduated cylinder is 200 ± 5% millimeters, and the minimum point in said excessive slurry hole is 160 ± 5% millimeters with the distance of the inner bottom surface of big graduated cylinder.
The method of application of the testing tool of a kind of prestress mud jacking slurries stability of the present invention may further comprise the steps:
Step 2; Mud jacking layering: pull out the hole plug on the blowing hole; Make the prestress mud jacking in the big graduated cylinder go out and inserts in the little graduated cylinder of mud jacking, fill with the little graduated cylinder of last mud jacking until the prestress mud jacking, and make the prestress mud jacking time of the above liquid level in the interior blowing hole of big graduated cylinder from the blowing orifice flow; Pour down the prestress mud jacking of the following liquid level in blowing hole in the big graduated cylinder into mud jacking in a small amount in the tube then, until the prestress mud jacking mud jacking down in a small amount tube fill with;
Step 3; Mud jacking density is than measuring; Respectively to the little graduated cylinder of last mud jacking of filling with the prestress mud jacking and play mud jacking in a small amount tube weigh, and record data draw the net weight of prestress mud jacking in the little graduated cylinder of mud jacking and the net weight of a play mud jacking a small amount of interior prestress mud jacking; Divided by the net weight of prestress mud jacking in the tube in a small amount of mud jacking down, the numerical value that draws is the density ratio of prestress mud jacking with the net weight of prestress mud jacking in the little graduated cylinder of last mud jacking;
Step 4; Mud jacking deposits and flows than measures: respectively the prestress mud jacking in little graduated cylinder of last mud jacking and the following mud jacking a small amount of tube is carried out fluidity with the fluidity appearance and measure; And record data; With the fluidity of the prestress mud jacking in the little graduated cylinder of last mud jacking divided by the fluidity of the prestress mud jacking in the tube in a small amount of mud jacking down, the deposition that the numerical value that draws is the prestress mud jacking ratio that flows.
The process of said step 2 mud jacking layering need be controlled in one minute.
The testing tool and the method for application thereof of prestress mud jacking slurries stability of the present invention have been adopted; The prestress mud jacking that need are measured through certain hour leave standstill deposition after; Carry out measuring its weight and fluidity respectively after the layering through prestress mud jacking to the upper and lower in the big graduated cylinder; The density that draws two layers of prestress mud jacking up and down than and the deposition ratio that flows, the density through analyzing the prestress mud jacking than and the deposition ratio that flows, can estimate the stability and the expansion character of slurries objective, accurately.
Description of drawings
Fig. 1 is a large amount of barrel structure synoptic diagram of the present invention;
Fig. 2 is the mud jacking barrel structure synoptic diagram in a small amount of going up of the present invention;
Fig. 3 is a mud jacking down of the present invention barrel structure synoptic diagram in a small amount.
Among the figure: the big graduated cylinder of 1-, 2-blowing hole, the 3-hole plug, the little graduated cylinder of the last mud jacking of 4-, 5-overflow and starch the hole, mud jacking a small amount of tube under the 6-, 7-cover.
Embodiment
As shown in Figure 1-Figure 3; The invention discloses a kind of testing tool of prestressing force mud jacking slurries stability; Comprise on the big graduated cylinder of cylindrical shape 1, the cylindrical shape mud jacking mud jacking tube 6 in a small amount under 4 and cylindrical shapes of tube in a small amount; Said go up mud jacking in a small amount tube 4 and play mud jacking shape, size and the volume of tube 6 is identical in a small amount, for the ease of observation, usually big graduated cylinder 1, go up mud jacking in a small amount tube 4 and following mud jacking a small amount of tins 6 all adopt clear glass or pmma material to make;
The innovative point of the testing tool of a kind of prestress mud jacking slurries stability of the present invention is that mainly the volume of said big graduated cylinder 1 is greater than last mud jacking a small amount of tube 4 and following mud jacking a small amount of tube 6 volume sums; As a rule, the volume of big graduated cylinder 1 only need be a bit larger tham mud jacking in a small amount tube 4 get final product with play mud jacking a small amount of 6 a volume sum;
Has the slurry hole 5 of overflowing near top open part on the wall of said big graduated cylinder 1; The main effect in slurry hole 5 of overflowing is to make the redundant sizing agent can be outside it flows out big graduated cylinder 1; The liquid level of prestress mud jacking all is consistent when guaranteeing to detect at every turn, and the liquid level of prestress mud jacking is the least significant end in the slurry hole 5 of overflowing when promptly detecting at every turn.
The bottom of said big graduated cylinder 1 and half place of starching distance between the hole 5 of overflowing have a blowing hole 2, and said blowing hole 2 has a hole plug 3.Specifically, the minimum point in said blowing hole 2 should be on the mid point between the nadir in the slurry hole 5 of overflowing and big graduated cylinder 1 inner bottom surface, and making the prestress mud jacking that places when detecting in the big graduated cylinder 1 is about the boundary is divided into two layers with the minimum point in blowing hole 2.
For the ease of unified standard, the volume of said big graduated cylinder 1 can be decided to be 5 liters, and allows ± 5% error; The said volume of going up mud jacking a small amount of tube 4 and following mud jacking a small amount of tube 6 can be decided to be 2 liters respectively; And allow ± 5% error, the diameter in said blowing hole 2 can be decided to be millimeter 16, and allows ± 10% error; The height of said big graduated cylinder 1 can be decided to be 200 millimeters; And allow ± 5% error, the minimum point in said excessive slurry hole 5 can be decided to be millimeter 160 with the distance of the inner bottom surface of big graduated cylinder 1, and allows ± 5% error.
When the testing tool that adopts prestress mud jacking slurries stability of the present invention carries out the stability detection of prestress mud jacking, mainly may further comprise the steps:
To last mud jacking tube 4 and play mud jacking tube 6 also record data of weighing respectively in a small amount in a small amount; To last mud jacking tube 4 and play mud jacking tins 6 weigh and during the prestress mud jacking leaves standstill, to carry out in a small amount in a small amount, can certainly before the prestress mud jacking leaves standstill, carry out, even can before prestress mud jacking Performance Detection, carry out in advance.
Usually during the prestress mud jacking leaves standstill, fall in the big graduated cylinder 1, influence the accuracy of prestress mud jacking performance measurement, can cover a cover 7 at the opening part of big graduated cylinder 1 in order to prevent extraneous dust.
Step 2; Mud jacking layering: after the prestress mud jacking leaves standstill 60 minutes at normal temperatures and pressures, pull out the hole plug 3 on the blowing hole 2, at this moment; Prestress mud jacking after leaving standstill also has certain fluidity; Prestress mud jacking in the big graduated cylinder 1 flows out from blowing hole 2 and inserts and go up mud jacking in a small amount in the tube 4, until the prestress mud jacking last mud jacking in a small amount tube 4 fill with, and make the prestress mud jacking time of big graduated cylinder 1 interior blowing hole 2 above liquid levels; Pour down the prestress mud jacking of blowing hole 2 following liquid levels in the big graduated cylinder 1 into mud jacking in a small amount in the tube 6 then, fill with mud jacking a small amount of down tins 6 until the prestress mud jacking; Owing to injecting the prestress mud jacking of upper and lower layer respectively mud jacking a small amount of tube 4 and the following mud jacking process of tube 6 in a small amount; The flowability of prestress mud jacking is also reducing slowly; For the accuracy of the data that guarantee to record, step 2, the process of mud jacking layering should The faster the better; In practical operation, the process of said step 2 mud jacking layering need be controlled in one minute.
Step 3; Mud jacking density ratio is measured, respectively the last mud jacking a small amount of tube 4 of filling with the prestress mud jacking weighed with following mud jacking a small amount of tube 6, and record data; Draw the clean quality of mud jacking a small amount of 4 an interior prestress mud jacking and the clean quality of following mud jacking a small amount of 6 an interior prestress mud jacking; The clean quality of prestress mud jacking is divided by the clean quality of prestress mud jacking in the tube 6 in a small amount of mud jacking down in the tube 4 in a small amount with last mud jacking, and the numerical value that draws is the mass ratio of prestress mud jacking since last mud jacking the volume of tube 4 and play mud jacking a small amount of tins 6 is identical in a small amount; Simultaneously; The prestress mud jacking is filled with mud jacking a small amount of tube 4 and following mud jacking a small amount of tube 6 again respectively, so last mud jacking a small amount of tube 4 is exactly the density ratio with the mass ratio of following mud jacking a small amount of tube 6 interior prestress mud jacking;
Step 4; Mud jacking deposition flows than measures: with the fluidity appearance respectively to last mud jacking in a small amount tube 4 and play mud jacking in a small amount tube 6 interior prestress mud jacking carry out fluidity mensuration; And record data; With last mud jacking in a small amount the fluidity of the prestress mud jacking in the tube 4 divided by the fluidity of the prestress mud jacking in the tube 6 in a small amount of mud jacking down, the deposition that the numerical value that draws is the prestress mud jacking ratio that flows.
The density that analysis draws compares and the mobile ratio of deposition, just can draw the stability and the expansion character of the prestress mud jacking that is detected.
Claims (4)
1. the testing tool of prestress mud jacking slurries stability; Comprise on a big graduated cylinder of cylindrical shape (1), the cylindrical shape under the little graduated cylinder of mud jacking (4) and the cylindrical shape mud jacking tube (6) in a small amount; The said little graduated cylinder of mud jacking (4) of going up is identical with shape, size and the volume of following mud jacking a small amount of tube (6); The volume that it is characterized in that said big graduated cylinder (1) is greater than the little graduated cylinder of last mud jacking (4) and following mud jacking a small amount of tube (6) volume sum; Has the slurry hole (5) of overflowing near top open part on the wall of said big graduated cylinder (1); The bottom of said big graduated cylinder (1) and half place of starching distance between the hole (5) of overflowing have a blowing hole (2), and said blowing hole (2) has a hole plug (3).
2. the testing tool of prestress mud jacking slurries stability according to claim 1; The volume that it is characterized in that said big graduated cylinder (1) is 5 ± 5% liters; The said volume of going up little graduated cylinder of mud jacking (4) and following mud jacking a small amount of tube (6) is 2 ± 5% liters; The diameter in said blowing hole (2) is 16 ± 10% millimeters, and the height of said big graduated cylinder (1) is 200 ± 5% millimeters, and the minimum point in said excessive slurry hole (5) is 160 ± 5% millimeters with the distance of the inner bottom surface of big graduated cylinder (1).
3. the testing tool of prestress mud jacking slurries stability according to claim 1 is characterized in that its method of application may further comprise the steps:
Step 1; Mud jacking leaves standstill: the blowing hole (2) of blocking hole plug (3) in big graduated cylinder (1); Pour the prestress hole path pressure grouting that makes into big graduated cylinder (1) then; Liquid level until prestress hole path pressure grouting is starched position, hole (5) to overflowing, and leaves standstill at normal temperatures and pressures 60 ± 1 minutes, and little graduated cylinder of last mud jacking (4) and following mud jacking a small amount of tube (6) are weighed respectively and record data;
Step 2; Mud jacking layering: pull out the hole plug (3) on the blowing hole (2); Prestress hole path pressure grouting in the big graduated cylinder (1) is gone up in the little graduated cylinder of mud jacking (4) from blowing hole (2) outflow and access; Fill with the little graduated cylinder of last mud jacking (4) until prestress hole path pressure grouting, and make the prestress hole path pressure grouting time of the above liquid level in big graduated cylinder (1) interior blowing hole (2); Pour down the prestress hole path pressure grouting of the following liquid level in big graduated cylinder (1) interior blowing hole (2) into mud jacking in a small amount in the tube (6) then, until prestress hole path pressure grouting mud jacking down in a small amount tube (6) fill with;
Step 3; Mud jacking density is than measuring; Respectively little graduated cylinder of last mud jacking (4) and the following mud jacking a small amount of tube (6) of filling with prestress hole path pressure grouting are weighed; And record data; Draw the net weight of the interior prestress hole path pressure grouting of the little graduated cylinder of mud jacking (4) and the net weight of following mud jacking a small amount of tube (6) interior prestress hole path pressure grouting, will go up the net weight of the net weight of the interior prestress hole path pressure grouting of the little graduated cylinder of mud jacking (4) divided by following mud jacking a small amount of tube (6) interior prestress hole path pressure grouting, the numerical value that draws is the density ratio of prestress hole path pressure grouting;
Step 4; The mud jacking deposition flows than measures: respectively the prestress hole path pressure grouting in little graduated cylinder of last mud jacking (4) and the following mud jacking a small amount of tube (6) is carried out fluidity with the fluidity appearance and measure; And record data; To go up the fluidity of the fluidity of the interior prestress hole path pressure grouting of the little graduated cylinder of mud jacking (4) divided by the prestress hole path pressure grouting in the following mud jacking a small amount of tube (6), the numerical value that draws is mobile ratio of deposition of prestress hole path pressure grouting.
4. the method for application of the testing tool of prestress mud jacking slurries stability according to claim 3 is characterized in that the process of said step 2 mud jacking layering need be controlled in one minute.
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| CN 201110298654 CN102384885B (en) | 2011-09-28 | 2011-09-28 | Tool for detecting pulp stability of prestress grouting and use method thereof |
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| CN 201110298654 CN102384885B (en) | 2011-09-28 | 2011-09-28 | Tool for detecting pulp stability of prestress grouting and use method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104764678A (en) * | 2015-04-14 | 2015-07-08 | 中国石油大学(华东) | Method for judging storage stability of heavy oil |
| CN105929108A (en) * | 2016-04-12 | 2016-09-07 | 浙江省交通工程建设集团有限公司 | Inspection method of prestressed duct grouting quality |
| CN108872526A (en) * | 2018-06-25 | 2018-11-23 | 陕西延长石油（集团）有限责任公司 | A kind of rapid detection method of coal stability |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104764678A (en) * | 2015-04-14 | 2015-07-08 | 中国石油大学(华东) | Method for judging storage stability of heavy oil |
| CN105929108A (en) * | 2016-04-12 | 2016-09-07 | 浙江省交通工程建设集团有限公司 | Inspection method of prestressed duct grouting quality |
| CN105929108B (en) * | 2016-04-12 | 2019-01-22 | 浙江交工集团股份有限公司 | Prestress hole path pressure grouting quality determining method |
| CN108872526A (en) * | 2018-06-25 | 2018-11-23 | 陕西延长石油（集团）有限责任公司 | A kind of rapid detection method of coal stability |
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| CN102384885B (en) | 2013-07-17 |
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