CN102967687A - Indoor fracturing grouting experiment system under bidirectional anisobaric condition - Google Patents
Indoor fracturing grouting experiment system under bidirectional anisobaric condition Download PDFInfo
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- CN102967687A CN102967687A CN2012104425571A CN201210442557A CN102967687A CN 102967687 A CN102967687 A CN 102967687A CN 2012104425571 A CN2012104425571 A CN 2012104425571A CN 201210442557 A CN201210442557 A CN 201210442557A CN 102967687 A CN102967687 A CN 102967687A
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Abstract
本发明公开了一种双向不等压条件下劈裂注浆室内实验系统，包括箱体、气垫、充气泵、注浆泵、数据采集系统、第一传感器、第二传感器和注浆管，气垫置于箱体内侧，呈容器状，充气泵连接气垫，注浆泵和注浆管连接，注浆管通过箱体、气垫插入气垫形成的腔体内部，数据采集系统通过第一传感器和注浆泵连接，数据采集系统通过第二传感器和箱体连接。该发明完全模拟了浅埋隧道注浆状态，解决了控制浆液的范围，注浆压力差的影响因素以及注浆压力作用下浆液扩散距离、劈裂方向，有效模拟不同埋深下浆液的劈裂范围。
The invention discloses a split grouting indoor experimental system under two-way unequal pressure conditions, including a box body, an air cushion, an air pump, a grouting pump, a data acquisition system, a first sensor, a second sensor, a grouting pipe, and an air cushion Placed inside the box, it is in the shape of a container. The air pump is connected to the air cushion, and the grouting pump is connected to the grouting pipe. The grouting pipe is inserted into the cavity formed by the air cushion through the box and the air cushion. The pump is connected, and the data acquisition system is connected with the tank through the second sensor. This invention completely simulates the grouting state of shallow buried tunnels, solves the range of grout control, the influencing factors of grouting pressure difference, and the grout diffusion distance and splitting direction under the action of grouting pressure, effectively simulating the splitting of grouting under different buried depths scope.
Description
Technical field
The present invention relates to construction engineering technical field, relate in particular to fracture grouting laboratory experiment system under a kind of two-way anisobaric condition.
Background technology
At present, in the slip casting process of tunnel and underground works, fracture grouting is the method that is most widely used in the slurry injection technique, now has been used to leading reinforcing, water blockoff, antiseepage, landslide processing and the foundation stabilization etc. of tunnel and underground works.Fracture grouting remains now take experience as main subject, and the slip casting process still is in semiempirical half theory state, and its theoretical research lags behind engineering practice far away, still exists two hang-ups to need to be resolved hurrily.The one, effective control problem of fracture grouting reinforcing scope; The 2nd, the accurate evaluation and test problem of the mechanism on fracture grouting pre-reinforcement stratum and slip casting effect.The colleague has carried out a large amount of correlative studys and has obtained some of great value achievements both at home and abroad, but because this research work has suitable difficulty and complicacy, most models are not considered the time variation of slurry stream variable element and the pressured state of the actual soil body, therefore can not reflect the actual forced status of the soil body.
Summary of the invention
The technical matters that the present invention solves is to consider viscosity, the water cement ratio of slurries, and infiltration coefficient and the parameters such as grouting pressure is poor, the flow velocity of slurries, slip casting time of soil are effectively simulated the actual pressured state of the soil body.
In order to solve above technical matters, the embodiment of the invention discloses fracture grouting laboratory experiment system under a kind of two-way anisobaric condition, comprise casing, air cushion, inflator pump, grouting pump, data acquisition system (DAS), first sensor, the second sensor and Grouting Pipe, air cushion places box inside, be container-like, inflator pump connects air cushion, grouting pump is connected with Grouting Pipe, Grouting Pipe is inserted the inside cavity that air cushion forms by casing, air cushion, data acquisition system (DAS) is connected with grouting pump by first sensor, and data acquisition system (DAS) is connected with casing by the second sensor.
As a kind of preferred, be connected to differential transformer between data acquisition system (DAS) and the second sensor.
As a kind of preferred, casing is that pmma material consists of.
As a kind of preferred, Grouting Pipe adopts the unidirectional grout structure.
As a kind of preferred, Grouting Pipe is specially: surrounded by thick 1.2mm steel pipe, be furnished with the grouting hole of 2.5mm above the steel pipe, from Grouting Pipe connects the grouting pump section piston and spring are housed successively.
The present invention adopts the air cushion pressurization according to the stressing conditions of soil body reality, uses inflator pump, and pressure is convenient to control, has guaranteed homogeneity and the accuracy of pressurization, has effectively simulated the stressed of the on-the-spot soil body.
Description of drawings
When considered in conjunction with the accompanying drawings, by the following detailed description of reference, can more completely understand better the present invention and learn easily wherein many advantages of following, but accompanying drawing described herein is used to provide a further understanding of the present invention, consist of a part of the present invention, illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not consist of to improper restriction of the present invention, wherein:
Fig. 1 is fracture grouting laboratory experiment system architecture synoptic diagram under the two-way anisobaric condition of the embodiment of the invention.
Fig. 2 is embodiment of the invention casing synoptic diagram.
Fig. 3 is embodiment of the invention air cushion synoptic diagram.
Fig. 4 is embodiment of the invention unidirectional grout sleeve valve pipe synoptic diagram.
Embodiment
Referring to figs. 1 through Fig. 4 embodiments of the invention are described.
For above-mentioned purpose, feature and advantage can be become apparent more, the present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
As shown in Figure 1, fracture grouting laboratory experiment system under a kind of two-way anisobaric condition, comprise casing 1, air cushion 2, inflator pump 3, grouting pump 4, data acquisition system (DAS) 5, first sensor 71, the second sensor 72 and Grouting Pipe 8, air cushion 2 places casing 1 inboard, be container-like, inflator pump 3 connects air cushion 2, grouting pump 4 is connected connection with Grouting Pipe, Grouting Pipe 8 is inserted the inside cavity that air cushion 2 forms by casing 1, air cushion 2, data acquisition system (DAS) 5 is connected connections by first sensor 71 with grouting pump, data acquisition system (DAS) 5 is passed through the second sensor 72 and is connected connection with casing.Between data acquisition system (DAS) 5 and the second sensor 72, be connected to differential transformer 6(LVDT).System passes through Grouting Pipe 8(sleeve valve pipe by grouting pump 4) to grouting in soil mass, make simultaneously inflator pump 3 to air cushion 2 inflations, make the soil body be in two-way anisobaric pressured state.Can observe the splitting of flowing of slurries and the soil body by the organic glass face.Data can obtain by data receiving system 5.
Fig. 2 is embodiment of the invention casing synoptic diagram.Fig. 3 is embodiment of the invention air cushion synoptic diagram.Fracture grouting laboratory experiment under the two-way anisobaric condition of the present invention, after finishing boring, pressurization by air cushion, grouting in soil mass to two-way anisobaric pressurized, observe flowing of slurries by the poly (methyl methacrylate) plate face, by splitting direction and the distance of the soil body, effectively adjust grouting pressure, make the splitting effect be conducive to the stable of the soil body, and save cost.As shown in Figure 4, the Grouting Pipe 8 of fracture grouting laboratory experiment system adopts unidirectional grout under the two-way anisobaric condition of the embodiment of the invention, steel pipe 9 thick 1.2mm, the above is furnished with the grouting hole 10 of 2.5mm, and piston 12 and spring 11 are arranged in the Grouting Pipe, grout injects by Grouting Pipe, piston is under the effect of pressure, and spring moves down and carries out slip casting, when pressure reduces, spring gos up, and prevents slurry reflux.The pressurized equipment of fracture grouting laboratory experiment system adopts the air cushion pressurization under the two-way anisobaric condition of the present invention, and the scope of air cushion pressure is: 0-50kpa, grouting pressure are 0.1-1mpa.
Although more than described the specific embodiment of the present invention, but those skilled in the art is to be understood that, these embodiments only illustrate, those skilled in the art can carry out various omissions, replacement and change to the details of said method and system in the situation that does not break away from principle of the present invention and essence.For example, merge the said method step, then belong to scope of the present invention thereby carry out the identical function of essence according to the identical method of essence to realize the identical result of essence.Therefore, scope of the present invention is only limited by appended claims.
Claims (5)
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| CN201210442557.1A CN102967687B (en) | 2012-11-07 | 2012-11-07 | Indoor fracturing grouting experiment system under bidirectional anisobaric condition |
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| CN102967687B CN102967687B (en) | 2015-05-06 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103308393A (en) * | 2013-05-31 | 2013-09-18 | 北京交通大学 | Formation fracturing resistance testing device and method |
| CN103760083A (en) * | 2014-01-15 | 2014-04-30 | 长沙理工大学 | Unconsolidated formation grouting experimental device |
| CN105067221A (en) * | 2015-07-02 | 2015-11-18 | 山东大学 | Dynamic induction simulation device for broken surrounding rock grouting reinforcement, and testing method therefor |
| CN107796706A (en) * | 2017-11-24 | 2018-03-13 | 辽宁工业大学 | Concrete sample Hydraulic fracturing test sealing device and implementation under axial force |
| CN109752249A (en) * | 2019-01-22 | 2019-05-14 | 北京交通大学 | Sealing device and sealing method between sample and grouting base in triaxial mud-water splitting test |
| CN109752247A (en) * | 2019-01-22 | 2019-05-14 | 北京交通大学 | A grouting device and grouting method for exhaust gas in mud water splitting test |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103308393A (en) * | 2013-05-31 | 2013-09-18 | 北京交通大学 | Formation fracturing resistance testing device and method |
| CN103308393B (en) * | 2013-05-31 | 2015-07-01 | 北京交通大学 | Formation fracturing resistance testing device and method |
| CN103760083A (en) * | 2014-01-15 | 2014-04-30 | 长沙理工大学 | Unconsolidated formation grouting experimental device |
| CN103760083B (en) * | 2014-01-15 | 2015-07-01 | 长沙理工大学 | Unconsolidated formation grouting experimental device |
| CN105067221A (en) * | 2015-07-02 | 2015-11-18 | 山东大学 | Dynamic induction simulation device for broken surrounding rock grouting reinforcement, and testing method therefor |
| CN105067221B (en) * | 2015-07-02 | 2016-05-18 | 山东大学 | A kind of breaking surrounding rock grouting and reinforcing is dynamically responded to analogue means and test method thereof |
| CN107796706A (en) * | 2017-11-24 | 2018-03-13 | 辽宁工业大学 | Concrete sample Hydraulic fracturing test sealing device and implementation under axial force |
| CN109752249A (en) * | 2019-01-22 | 2019-05-14 | 北京交通大学 | Sealing device and sealing method between sample and grouting base in triaxial mud-water splitting test |
| CN109752247A (en) * | 2019-01-22 | 2019-05-14 | 北京交通大学 | A grouting device and grouting method for exhaust gas in mud water splitting test |
| CN109752249B (en) * | 2019-01-22 | 2024-02-27 | 北京交通大学 | Sealing device and sealing method for sample and grouting base in triaxial mud water splitting test |
| CN109752247B (en) * | 2019-01-22 | 2024-03-01 | 北京交通大学 | Grouting device and grouting method for exhausting in muddy water splitting test |
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| CN102967687B (en) | 2015-05-06 |
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