阅读说明：本技术 一种盾构隧道同步注浆浆液性能检测装置及其检测方法 (Shield tunnel synchronous grouting slurry performance detection device and detection method thereof ) 是由 张怀伟 刘小辉 梁生颖 王小鹏 王伟 谢行飞 张俊豪 于翔 曹雪敏 郭瑞鹏 樊保 于 2020-07-10 设计创作，主要内容包括：本发明涉及浆液检测领域,公开了一种盾构隧道同步注浆浆液性能检测装置及其检测方法,该检测装置为容量瓶,容量瓶包括：瓶身、瓶口及瓶塞,瓶身分为上瓶身和下瓶身；上瓶身的表面标有容量刻度线及容量刻度值,上瓶身的长度大于下瓶身的长度,下瓶身的横截面积大于上瓶身的横截面积,下瓶身的容量大于上瓶身的容量。本发明自制浆液检测专用容量瓶能快速有效的检测出同步注浆浆液的密度、倾析率、结石率和固结收缩率,提升了浆液性能检测的精度与速度。(The invention relates to the field of slurry detection, and discloses a device and a method for detecting synchronous grouting slurry performance of a shield tunnel, wherein the detection device is a volumetric flask, and the volumetric flask comprises: the bottle comprises a bottle body, a bottle opening and a bottle plug, wherein the bottle body is divided into an upper bottle body and a lower bottle body; the surface of the upper bottle body is marked with capacity scale lines and a capacity scale value, the length of the upper bottle body is greater than that of the lower bottle body, the cross-sectional area of the lower bottle body is greater than that of the upper bottle body, and the capacity of the lower bottle body is greater than that of the upper bottle body. The special volumetric flask for detecting the self-made slurry can quickly and effectively detect the density, the decantation rate, the calculus rate and the consolidation shrinkage rate of the synchronous grouting slurry, and improves the precision and the speed of the slurry performance detection.)

1. The utility model provides a synchronous slip casting thick liquid performance detection device of shield tunnel, a serial communication port, detection device is the volumetric flask, the volumetric flask includes: the bottle comprises a bottle body, a bottle opening and a bottle plug, wherein the bottle body is divided into an upper bottle body and a lower bottle body; the surface of the upper bottle body is marked with capacity scale lines and a capacity scale value, the length of the upper bottle body is larger than that of the lower bottle body, the cross-sectional area of the lower bottle body is larger than that of the upper bottle body, and the capacity of the lower bottle body is larger than that of the upper bottle body.

2. The detecting device for detecting the rotation of the motor rotor according to the claim 1, wherein the starting scale mark position of the capacity scale mark is higher than the boundary line position of the upper bottle body and the lower bottle body; the end scale mark position of the capacity scale mark is lower than the bottle mouth position.

3. The test device of claim 1, wherein the scale difference between adjacent volumetric scales is 1ml or 2ml and the distance between adjacent volumetric scales is 1mm or 2 mm.

4. A test device according to claim 1 or 3, wherein the scale difference between adjacent volume scale values is 5ml or 10 ml.

5. The testing device of claim 4, wherein the volumetric flask has a starting volumetric capacity scale value of 900ml and an ending volumetric capacity scale value of 1050 ml; the maximum detection capacity of the volumetric flask is 1050ml plus or minus 0.5 ml.

6. A shield tunnel synchronous grouting slurry performance detection method adopting the detection device of any one of claims 1-5, characterized by comprising the following steps:

step S1, density detection: weigh empty volumetric flask after capping, record M₁(ii) a Placing the empty volumetric flask on a horizontal undisturbed platform, stably injecting the prepared slurry into the volumetric flask by using a long-neck funnel and capping a bottle stopper in time, wherein the liquid level of the slurry is required to be level with a scale mark corresponding to a volumetric scale value H; weighing the injected slurry and capping the stopperThe mass of the latter flask, denoted M₂；

Step S2, decantation rate detection: standing the volumetric flask filled with the serous fluid for 3h +/-5 min, separating water and stone in the serous fluid, immediately reading the corresponding volumetric scale value of the current serous fluid stone position, and recording as V₁；

Step S3, calculus rate detection: continuously standing the volumetric flask filled with the serous fluid to 3d +/-30 min, immediately reading the corresponding volumetric scale value of the current serous fluid calculus, and recording as V₂；

And step S4, calculating the density, the decantation rate, the calculus rate and the consolidation shrinkage rate.

7. The detection method according to claim 6, characterized in that the detection environmental conditions adopted by the detection method are: the temperature is required to be 20 plus or minus 2 ℃, and the relative humidity is required to be more than 50 percent.

8. The detection method according to claim 6 or 7, wherein the materials used for preparing the grouting slurry sample comprise cement, fly ash, bentonite, fine aggregate and water, wherein the fly ash can be replaced by ground limestone powder, other organic gelled materials or inorganic gelled materials.

9. The detection method according to claim 6, characterised in that said capacity-scale value H is equal to 1000 ml.

10. The method of claim 9, wherein each performance indicator of the grouting slurry sample is calculated using the following formula:

the density calculation formula is: density = (M)₂-M₁) 1000/1000, required to be accurate to 10kg/m³；

The decantation rate is calculated by the formula: decantation rate = (1000-V)₁) 100/1000, required to be accurate to 0.1%;

the calculus rate calculation formula is as follows: calculus rate = V₂100/1000, required to be accurate to 0.1%;

the consolidation shrinkage calculation formula is as follows: the consolidation shrinkage rate = 1-calculus rate, and is required to be accurate to 0.1%;

wherein M is₁、M₂The weight units of (A) are g, V₁、V₂The volume unit of (a) is ml.

Technical Field

The invention relates to the field of slurry detection, in particular to a device and a method for detecting synchronous grouting slurry performance of a shield tunnel.

Background

The shield construction method is a main construction method adopted for constructing underwater tunnels and underground tunnels. The synchronous grouting technology behind the shield segment is a key technology in shield tunnel construction. In the construction process of adopting the shield method to excavate the tunnel, need to carry out the slip casting behind the segment in order to fill the building clearance, the slip casting mode behind the segment can adopt synchronous slip casting or instant slip casting, in the stratum that can not be from steady, must adopt synchronous slip casting, just can guarantee the slip casting volume under normal slip casting pressure, fills the building clearance, prevents that the stratum from removing to the tunnel direction, reduces or controls the earth's surface subsides that stratum stress release caused. The synchronous grouting has high requirements on the performance of the grout, so that before the synchronous grouting, a grouting grout sample needs to be subjected to performance index detection.

In order to achieve the expected purpose of synchronous grouting, the performance requirements of grouting slurry are high, for example, the slurry strength needs to be adapted to the geological condition, the slurry density, decantation rate, calculus rate, consolidation shrinkage rate and the like need to meet the design requirements, the fluidity needs to be adapted to the grouting equipment and pipeline condition, the consistency needs to be adapted to the conditions of construction season, construction site temperature and the like, and the setting time needs to meet the time requirements of conveying and slurry flowing and filling at the back of the shield segment lining and cannot be too long. Therefore, grouting slurry detection needs to detect a plurality of performance indexes respectively, and the existing detection device is too complex in design, inconvenient to operate, or too simple in design, low in detection precision and low in detection efficiency.

Disclosure of Invention

The invention mainly aims to provide a shield tunnel synchronous grouting slurry performance detection device and a detection method thereof, and aims to solve the technical problems of insufficient simplicity and convenience in operation or low detection precision and low efficiency of the conventional grouting slurry performance detection device.

The invention provides a shield tunnel synchronous grouting slurry performance detection device in a first aspect, wherein the detection device is a volumetric flask, and the volumetric flask comprises: the bottle comprises a bottle body, a bottle opening and a bottle plug, wherein the bottle body is divided into an upper bottle body and a lower bottle body; the surface of the upper bottle body is marked with capacity scale lines and a capacity scale value, the length of the upper bottle body is larger than that of the lower bottle body, the cross-sectional area of the lower bottle body is larger than that of the upper bottle body, and the capacity of the lower bottle body is larger than that of the upper bottle body.

Optionally, in a first implementation manner of the first aspect of the present invention, a starting position of the capacity scale mark is higher than a boundary position of the upper bottle body and the lower bottle body; the end scale mark position of the capacity scale mark is lower than the bottle mouth position.

Optionally, in a second implementation manner of the first aspect of the present invention, the scale difference between adjacent volume scale marks is 1ml or 2ml, and the distance between adjacent volume scale marks is 1mm or 2 mm.

Optionally, in a third implementation form of the first aspect of the present invention, the scale difference between adjacent volume scale values is 5ml or 10 ml.

Optionally, in a fourth implementation manner of the first aspect of the present invention, the volumetric flask has a starting volumetric capacity scale value of 900ml and an ending volumetric capacity scale value of 1050 ml; the maximum detection capacity of the volumetric flask is 1050ml plus or minus 0.5 ml.

The invention provides a shield tunnel synchronous grouting slurry performance detection method adopting any one detection device, which comprises the following steps:

step S1, density detection: weigh empty volumetric flask after capping, record M₁(ii) a Placing the empty volumetric flask on a horizontal undisturbed platform, stably injecting the prepared slurry into the volumetric flask by using a long-neck funnel and capping a bottle stopper in time, wherein the liquid level of the slurry is required to be level with a scale mark corresponding to a volumetric scale value H; the mass of the flask after the slurry was weighed and capped with the stopper is recorded as M₂；

Step S2, decantation rate detection: standing the volumetric flask after the slurry injection for 3h +/-5 minThe water and stone separation of the slurry in the volumetric flask occurs, and the corresponding volumetric scale value at the current position of the slurry stone is immediately read and recorded as V₁；

Step S3, calculus rate detection: continuously standing the volumetric flask filled with the serous fluid to 3d +/-30 min, immediately reading the corresponding volumetric scale value of the current serous fluid calculus, and recording as V₂；

And step S4, calculating the density, the decantation rate, the calculus rate and the consolidation shrinkage rate.

Optionally, in a first implementation manner of the second aspect of the present invention, the detection environmental condition adopted by the detection method is: the temperature is required to be 20 plus or minus 2 ℃, and the relative humidity is required to be more than 50 percent.

Optionally, in a second implementation manner of the second aspect of the present invention, the material used for preparing the grouting slurry sample includes: cement, fly ash, bentonite, fine aggregate and water, wherein the fly ash can be replaced by ground limestone powder, other organic cementing materials or inorganic cementing materials.

Optionally, in a third implementation form of the second aspect of the present invention, the capacity scale value H is equal to 1000 ml.

Optionally, in a fourth implementation manner of the second aspect of the present invention, each performance index of the grouting slurry sample is calculated by using the following formula:

the density calculation formula is: density = (M)₂-M₁) 1000/1000, required to be accurate to 10kg/m³；

The decantation rate is calculated by the formula: decantation rate = (1000-V)₁) 100/1000, required to be accurate to 0.1%;

the calculus rate calculation formula is as follows: calculus rate = V₂100/1000, required to be accurate to 0.1%;

the consolidation shrinkage calculation formula is as follows: the consolidation shrinkage rate = 1-calculus rate, and is required to be accurate to 0.1%;

wherein M is₁、M₂The weight units of (A) are g, V₁、V₂The volume unit of (a) is ml.

The invention provides a shield tunnel synchronous grouting slurry performance detection device which is a volumetric flask, and the volumetric flask comprises: the bottle body comprises an upper bottle body and a lower bottle body. The structure of the detection device enables the detection device to have the characteristic of simple and convenient operation. In addition, the upper body surface of the volumetric flask is marked with volumetric scale lines and volumetric scale values, so that a tester can conveniently observe the volume change of the slurry in the flask. In addition, the length of the upper body of the volumetric flask is greater than that of the lower body, the cross-sectional area of the lower body is greater than that of the upper body, and the capacity of the lower body is greater than that of the upper body, so that the volume change of the grout injected into the volumetric flask is concentrated on the upper body, and even slight volume change of the grout can be clearly reflected by the capacity scale lines due to the slender shape of the upper body.

The volumetric flask of the invention is mainly suitable for detecting the slurry indexes related to volume change, such as decantation rate, calculus rate, consolidation shrinkage rate and the like. Meanwhile, the lower bottle body has larger capacity, so more slurry can be injected at one time, and the density detection can be realized. In addition, the invention also discloses a grouting slurry sample performance index detection method taking the volumetric flask as a detection device, which can sequentially complete the detection of four main performance indexes of density, decantation rate, calculus rate and consolidation shrinkage rate at one time, and improves the detection efficiency.

Drawings

Fig. 1 is a schematic basic structural diagram of an embodiment of a device for detecting synchronous grouting slurry performance of a shield tunnel according to the embodiment of the invention;

fig. 2 is a schematic structural diagram of a shield tunnel synchronous grouting slurry performance detection apparatus according to a preferred embodiment of the present invention;

fig. 3 is a schematic flow chart of an embodiment of a method for detecting the synchronous grouting slurry performance of a shield tunnel by using the detection device in fig. 1 in the embodiment of the present invention.

Detailed Description