CN102943663B - A kind of slopes wall device for pressure measurement and method - Google Patents
A kind of slopes wall device for pressure measurement and method Download PDFInfo
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- CN102943663B CN102943663B CN201210513720.9A CN201210513720A CN102943663B CN 102943663 B CN102943663 B CN 102943663B CN 201210513720 A CN201210513720 A CN 201210513720A CN 102943663 B CN102943663 B CN 102943663B
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Abstract
The invention provides a kind of slopes wall device for pressure measurement and method, this device comprises pressure cell support, soil pressure box, flexible pipe, pvc pipe and signal fairlead, soil pressure box is provided with in pressure cell support, soil pressure box and soil body close contact, pressure cell support connects pvc pipe by flexible pipe, pvc pipe connection signal fairlead, the signal lead-out wire of each soil pressure box is through flexible pipe and pvc pipe and derive in signal fairlead; To make soil pressure box fixedly secure, avoid the steps such as the sliding formwork in work progress to destroy the signal lead-out wire of soil pressure box, the water outside the borehole wall effectively can be avoided to infiltrate borehole wall inside along pipelines such as pvc pipes, ensure the accuracy of measurement result.
Description
Technical field
The present invention relates to mine support field of engineering technology, be specifically related to a kind of slopes wall device for pressure measurement and method.
Background technology
Need when digging slopes wall in mine support engineering to carry out temporary lining to the soil body, freezing process arranges freezing pipe at the moisture soil body, circulating refrigerant agent is set in freezing pipe, to take away heat in the soil body thus to form the frozen soil of high, the good airproof performance of intensity, play the effect of bearing load and water-tight, frozen soil wall strong adaptability, safe and reliable, pollution-free, often as the temporary lining method in slopes wall engineering.
Because Free water, capillary water and a part of weak binding water freezed contained by Shi Tuzhong is phase-changed into ice in succession with temperature reduction, generate the ice invaders such as many ice crystals, ice band, lens, thus cause the relative displacement of soil particle, make determinator for soil volume, i.e. so-called " frost heave " phenomenon.When freezing soil melts, the soil body after thawing reduces to produce melting sedimentation because ice becomes water volume, simultaneously owing to there is discharging consolidation in thawing region, causes the densification sedimentation of soil layer, i.e. so-called " thaw collapse " phenomenon.The frost-heaving and thawing of the soil body can make slopes wall is subject to certain pressure; slopes wall is easily caused to break; in order to study the frozen swell and melt settlement rule of frozen soil, protect slopes wall simultaneously, need freezing and monitoring the pressure that frozen soil body is applied on slopes wall in course of defrosting.
At present, the normal measurement adopting soil pressure box to realize borehole wall pressure, but soil pressure box needs to be fixed on certain position, and guarantee measurement result is accurate, but in the soil body, is difficult to allow soil pressure box remain on constant position.Common soil pressure box has a signal lead-out wire, for the signal of pressure cell is derived, but in slopes wall work progress, the mode of normal employing sliding formwork is constructed top donor in two lining structures and the left and right borehole wall, obtain the soil body that soil pressure box records to the pressure of slopes wall, signal lead-out wire is needed to cause borehole wall inside, when the mode of slopes wall employing sliding formwork constructs two lining structures, signal lead-out wire is difficult to through slopes wall, even if the mode such as perforate on the employing borehole wall, also be easy to cause shaft wall leak, bring serious potential safety hazard.
Summary of the invention
For above-mentioned technical problem, the invention provides a kind of slopes wall device for pressure measurement and method, fixedly secure soil pressure box, avoid the signal lead-out wire that the steps such as the sliding formwork in work progress destroy soil pressure box, the water outside the borehole wall effectively can be avoided to infiltrate borehole wall inside along pipelines such as pvc pipes, make measurement result accurate.
For achieving the above object, the invention provides a kind of slopes wall device for pressure measurement, comprise pressure cell support, soil pressure box, flexible pipe, pvc pipe and signal fairlead, soil pressure box is provided with in pressure cell support, soil pressure box and soil body close contact, pressure cell support connects pvc pipe by flexible pipe, pvc pipe connection signal fairlead, and the signal lead-out wire of each soil pressure box is through flexible pipe and pvc pipe and derive in signal fairlead.
Described signal fairlead is made up of body, block water steel plate and support, and have one to three circles to block water steel plate in the outer setting of body, the bottom of body is provided with support, and the inner side on body top is provided with screw thread.
Described soil pressure box adopts TJ-23 type type vibration wire soil pressure box.
Flexible pipe tighten is fixed by iron wire by described flexible pipe and pvc pipe junction.
Flexible pipe tighten is fixed by iron wire by described flexible pipe and pressure cell support junction.
A kind of slopes wall pressure measurement method, apply above-mentioned slopes wall device for pressure measurement, comprise the following steps:
A. when Shaft Excavation, the shaped steel in first lining structure is transported to work plane and assembling after, at borehole wall top and sidepiece
Pressure-measuring-point setting pressure box support, soil pressure box is set in pressure cell support, soil pressure box and soil body close contact, the signal lead-out wire of soil pressure box is drawn in pressure cell support, and pressure cell support is fixed on the shaped steel in first lining structure by the mode of colligation or welding;
B. process the pvc pipe be mated according to borehole wall shape, by the pvc pipe colligation of borehole wall top and sidepiece on first lining structure, pvc pipe one end is connected to pressure cell support by flexible pipe, and the other end causes borehole wall lower sidewall as link; The signal lead-out wire of soil pressure box is through flexible pipe and pvc pipe, and flexible pipe tighten is fixed by iron wire by flexible pipe and pvc pipe junction, and flexible pipe tighten is fixed by iron wire by flexible pipe and soil pressure box support junction;
C. after mortar ragstone layer in borehole wall bottom fills slabstone, before non-perfusion mortar, slabstone near borehole wall low pressure measuring point is cleaned out, at borehole wall low pressure measuring point setting pressure box support, soil pressure box is set in pressure cell support, soil pressure box and soil body close contact, the signal lead-out wire of soil pressure box is drawn in pressure cell support, then fills out back near pressure-measuring-point by slabstone;
D. bottom the borehole wall, the construction of mortar ragstone layer is complete, after the reinforcing bar binding in layer of concrete, adopts one section of pvc pipe
Connect flexible pipe fixing on the pressure cell support of borehole wall bottom, and this section of pvc pipe end is connected with the pvc pipe of borehole wall top and sidepiece by L shape joint, borehole wall bottom is provided with signal fairlead, contracting modulus sum when signal fairlead is greater than thickness and the sliding formwork form removal of sliding formwork apart from the distance of borehole wall sidepiece, pvc pipe connection signal fairlead bottom the borehole wall, the signal lead-out wire of soil pressure box is through flexible pipe and pvc pipe, flexible pipe tighten is fixed by iron wire by flexible pipe and pvc pipe junction, flexible pipe tighten is fixed by iron wire by flexible pipe and pressure cell support junction;
The signal lead-out wire of the soil pressure box e. arranged in borehole wall top, sidepiece, bottom passes in signal fairlead, numbers respectively, and records the initial value of the soil pressure that each group of soil pressure box is surveyed;
F. slopes wall underplate concrete is built;
G. filling waterproofing materials in signal fairlead body, if still have swelling to go out in signal fairlead, coordinates with corresponding plug
Unsintered tape by the screw thread that arranges inside signal fairlead body by the shutoff of signal fairlead;
H. as required, record soil pressure box and survey soil pressure value.
Described soil pressure box is adopted as TJ-23 type type vibration wire soil pressure box.
The distance of the pressure cell support of described borehole wall top, sidepiece and bottom, flexible pipe and pvc pipe distance two lining structure inwalls is all not less than 30cm.
The distance of the borehole wall underplate concrete apparent height of the steel plate distance design that blocks water of the topmost of described signal fairlead body outer setting is 30cm.
The waterproofing materials of filling in described body is cement mortar-waterglass mixture.
Beneficial effect of the present invention is according to known to describing of such scheme: described slopes wall device for pressure measurement and method, the soil pressure being applicable to slopes wall is measured, operation and laying are conveniently, soil pressure box can be fixedly secured, avoid the signal lead-out wire that the steps such as the sliding formwork in work progress destroy soil pressure box, effectively avoid the water outside the borehole wall to infiltrate borehole wall inside along pipelines such as pvc pipes, measurement result is more accurate, achieves the soil pressure outside the inner Measurement accuracy borehole wall of the borehole wall.
Accompanying drawing explanation
Fig. 1 is the schematic layout pattern of slopes wall pressure measurement method of the present invention;
Fig. 2 is the structural representation of signal fairlead;
Mark in figure: 1, pressure cell support; 2, soil pressure box; 3, flexible pipe; 4, pvc pipe; 5, signal fairlead; 51, body; 52, screw thread; 53, block water steel plate; 54, support; 6, first lining structure; 7, two lining structures.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is further described:
As shown in drawings, certain colliery main shaft auxiliary shaft all adopts inclined shaft, because main shaft and auxiliary shaft are positioned at water bearing ground, adopts artificial stratum freezing process as soil body temporary reinforcement method.Frost-heaving and thawing due to the soil body can make slopes wall is subject to certain pressure, easily causes slopes wall to break, and in order to study the frozen swell and melt settlement rule of frozen soil, protects slopes wall simultaneously, needs on the borehole wall, settle soil pressure box to measure soil pressure.
Slopes wall device for pressure measurement provided by the invention, comprise pressure cell support 1, soil pressure box 2, flexible pipe 3, pvc pipe 4 and signal fairlead 5, pressure cell support 1 internal fixtion has soil pressure box 2, soil pressure box 2 and soil body close contact, pressure cell support 1 connects pvc pipe 4 by flexible pipe 3, pvc pipe 4 connection signal fairlead 5, the signal lead-out wire of each soil pressure box 2, through flexible pipe 3 and pvc pipe 4, is derived in signal fairlead 5.
Described signal fairlead 5 is made up of body 51, block water steel plate 53 and support 54, and have one to three circles to block water steel plate 53 in the outer setting of body 51, the bottom of body 51 is provided with support 54, and the inner side on body 51 top is provided with screw thread 52.
Described soil pressure box 2 is TJ-23 type type vibration wire soil pressure box.
Flexible pipe 3 tighten is fixed by iron wire with pvc pipe 4 junction by described flexible pipe 3.
Flexible pipe 3 tighten is fixed by iron wire with pressure cell support 1 junction by described flexible pipe 3.
Utilize measurement mechanism of the present invention and method to carry out borehole wall pressure measxurement, comprise the following steps:
A. when Shaft Excavation, shaped steel in first lining structure 6 be transported to work plane and assembling after, at the pressure-measuring-point setting pressure box support 1 of borehole wall top and sidepiece, soil pressure box 2 is set in pressure cell support 1, soil pressure box 2 and soil body close contact, the signal lead-out wire of soil pressure box 2 is drawn in pressure cell support 1, and pressure cell support 1 is fixed on the shaped steel in first lining structure 6 by the mode of colligation or welding;
B. process the pvc pipe 4 be mated according to borehole wall shape, by pvc pipe 4 colligation of borehole wall top and sidepiece on first lining structure 6, pvc pipe 4 one end is connected to pressure cell support 1 by flexible pipe 3, and the other end causes borehole wall lower sidewall as link; The signal lead-out wire of soil pressure box 2 is through flexible pipe 3 and pvc pipe 4, and flexible pipe 3 tighten is fixed by iron wire by flexible pipe 3 and pvc pipe 4 junction, and flexible pipe 3 tighten is fixed by iron wire by flexible pipe 3 and pressure cell support 1 junction;
C. after borehole wall bottom mortar ragstone layer fills slabstone, before non-perfusion mortar, by the slabstone near borehole wall low pressure measuring point
Clean out, at borehole wall low pressure measuring point setting pressure box support 1, soil pressure box 2 is set, soil pressure box 2 and soil body close contact in pressure cell support 1, the signal lead-out wire of soil pressure box 2 is drawn in pressure cell support 1, is filled out back by slabstone near pressure-measuring-point;
D. bottom the borehole wall, the construction of mortar ragstone layer is complete, after reinforcing bar binding in layer of concrete, flexible pipe 3 fixing on the pressure cell support 1 adopting one section of pvc pipe 4 to connect borehole wall bottom and this section of pvc pipe is connected by the pvc pipe 4 of L shape joint with borehole wall top and sidepiece, the pvc pipe 4 connection signal fairlead 5 of bottom, the signal lead-out wire of soil pressure box 2 is through flexible pipe 3 and pvc pipe 4, and flexible pipe 3 tighten is fixed by iron wire by flexible pipe 3 and pvc pipe 4 junction; Flexible pipe 3 tighten is fixed by iron wire by flexible pipe 3 and pressure cell support 1 junction, borehole wall bottom signalization fairlead 5, signal fairlead 5 is 70cm apart from the distance of borehole wall sidepiece, to avoid being squeezed during sliding formwork contracting mould, the steel plate 53 that blocks water of signal fairlead 5 topmost is 30cm apart from the distance of borehole wall underplate concrete apparent height of design, the bottom of body 51 is provided with support 54, the inner side on body 51 top is provided with screw thread 52, is fixed on the reinforcing bar in layer of concrete by support 54 by the mode of colligation or welding;
E. the signal lead-out wire amounting to 4 groups of soil pressure boxes 2 arranged in borehole wall top, sidepiece, bottom is from signal fairlead 5
Inside pass, number respectively, and record the initial value of the soil pressure that each group of soil pressure box 2 is surveyed;
F. slopes wall underplate concrete is built;
G. backfilling cement mortar-waterglass mixture in signal fairlead 5 body 51;
H. as required, record soil pressure box 2 survey soil pressure value.
The pressure cell support 1 of described borehole wall top, sidepiece and bottom, flexible pipe 3 and pvc pipe 4 are all greater than 30cm, to meet waterproof requirement apart from the distance of two lining structure 7 inwalls.
In the above-described embodiments, better embodiment of the present invention is described, obviously, under inventive concept of the present invention, still can make a lot of change.At this, should illustrate, any change made under inventive concept of the present invention all will fall within the scope of protection of the present invention.
Claims (10)
1. a slopes wall device for pressure measurement, comprise pressure cell support, soil pressure box, flexible pipe, pvc pipe and signal fairlead, it is characterized in that, soil pressure box is provided with in pressure cell support, soil pressure box and soil body close contact, pressure cell support connects pvc pipe by flexible pipe, pvc pipe connection signal fairlead, and the signal lead-out wire of each soil pressure box is through flexible pipe and pvc pipe and derive in signal fairlead.
2. slopes wall device for pressure measurement according to claim 1, it is characterized in that, described signal fairlead is made up of body, block water steel plate and support, has one to three circles to block water steel plate in the outer setting of body, the bottom of body is provided with support, and the inner side on body top is provided with screw thread.
3. slopes wall device for pressure measurement according to claim 1, is characterized in that, described soil pressure box adopts TJ-23 type type vibration wire soil pressure box.
4. slopes wall device for pressure measurement according to claim 1, is characterized in that, flexible pipe tighten is fixed by iron wire by described flexible pipe and pvc pipe junction.
5. slopes wall device for pressure measurement according to claim 1, is characterized in that, flexible pipe tighten is fixed by iron wire by described flexible pipe and pressure cell support junction.
6. a slopes wall pressure measurement method, application rights requires the slopes wall device for pressure measurement described in 1, it is characterized in that, said method comprising the steps of:
A. when Shaft Excavation, shaped steel in first lining structure is transported to work plane and assembling after, at the pressure-measuring-point setting pressure box support of borehole wall top and sidepiece, soil pressure box is set in pressure cell support, soil pressure box and soil body close contact, the signal lead-out wire of soil pressure box is drawn in pressure cell support, and pressure cell support is fixed on the shaped steel in first lining structure by the mode of colligation or welding;
B. process the pvc pipe be mated according to borehole wall shape, by the pvc pipe colligation of borehole wall top and sidepiece on first lining structure, pvc pipe one end is connected to pressure cell support by flexible pipe, and the other end causes borehole wall lower sidewall as link; The signal lead-out wire of soil pressure box is through flexible pipe and pvc pipe, and flexible pipe tighten is fixed by iron wire by flexible pipe and pvc pipe junction, and flexible pipe tighten is fixed by iron wire by flexible pipe and soil pressure box support junction;
C. after mortar ragstone layer in borehole wall bottom fills slabstone, before non-perfusion mortar, slabstone near borehole wall low pressure measuring point is cleaned out, at borehole wall low pressure measuring point setting pressure box support, soil pressure box is set in pressure cell support, soil pressure box and soil body close contact, the signal lead-out wire of soil pressure box is drawn in pressure cell support, then fills out back near pressure-measuring-point by slabstone;
D. bottom the borehole wall, the construction of mortar ragstone layer is complete, after reinforcing bar binding in layer of concrete, one section of pvc pipe is adopted to connect flexible pipe fixing on the pressure cell support of borehole wall bottom, and this section of pvc pipe end is connected with the pvc pipe of borehole wall top and sidepiece by L shape joint, borehole wall bottom is provided with signal fairlead, contracting modulus sum when signal fairlead is greater than thickness and the sliding formwork form removal of sliding formwork apart from the distance of borehole wall sidepiece, pvc pipe connection signal fairlead bottom the borehole wall, the signal lead-out wire of soil pressure box is through flexible pipe and pvc pipe, flexible pipe tighten is fixed by iron wire by flexible pipe and pvc pipe junction, flexible pipe tighten is fixed by iron wire by flexible pipe and pressure cell support junction,
The signal lead-out wire of the soil pressure box e. arranged in borehole wall top, sidepiece, bottom passes in signal fairlead, numbers respectively, and records the initial value of the soil pressure that each group of soil pressure box is surveyed;
F. slopes wall underplate concrete is built;
G. filling waterproofing materials in signal fairlead body, if still have swelling to go out in signal fairlead, coordinates unsintered tape by the screw thread that arranges inside signal fairlead body by the shutoff of signal fairlead with corresponding plug;
H. as required, record soil pressure box and survey soil pressure value.
7. slopes wall pressure measurement method according to claim 6, is characterized in that, described soil pressure box is adopted as TJ-23 type type vibration wire soil pressure box.
8. slopes wall pressure measurement method according to claim 6, is characterized in that, the distance of the pressure cell support of described borehole wall top, sidepiece and bottom, flexible pipe and pvc pipe distance two lining structure inwalls is all not less than 30cm.
9. slopes wall pressure measurement method according to claim 6, is characterized in that, the distance of the borehole wall underplate concrete apparent height of the steel plate distance design that blocks water of the topmost of described signal fairlead body outer setting is 30cm.
10. slopes wall pressure measurement method according to claim 6, is characterized in that, the waterproofing materials of filling in described body is cement mortar-waterglass mixture.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210513720.9A CN102943663B (en) | 2012-12-05 | 2012-12-05 | A kind of slopes wall device for pressure measurement and method |
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| CN201210513720.9A CN102943663B (en) | 2012-12-05 | 2012-12-05 | A kind of slopes wall device for pressure measurement and method |
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| CN102943663A CN102943663A (en) | 2013-02-27 |
| CN102943663B true CN102943663B (en) | 2015-08-26 |
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| CN108387334A (en) * | 2018-02-09 | 2018-08-10 | 西安科技大学 | A kind of inclined shaft freezing construction borehole wall mechanical characteristic monitoring device |
| CN108915735A (en) * | 2018-06-21 | 2018-11-30 | 安徽理工大学 | Slopes wall construction method for supporting and slopes wall support system |
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| US6230557B1 (en) * | 1998-08-04 | 2001-05-15 | Schlumberger Technology Corporation | Formation pressure measurement while drilling utilizing a non-rotating sleeve |
| CN1966934B (en) * | 2005-11-16 | 2011-12-28 | 中国石油大学(北京) | Method for prediction of collapse pressure and fracture pressure of stratum under drill bit while drilling |
| CN201372792Y (en) * | 2009-03-13 | 2009-12-30 | 中国石油天然气集团公司 | Instrument for measuring temperature and pressure while drilling in drilling well |
| CN102121377B (en) * | 2011-01-05 | 2013-07-31 | 中国海洋石油总公司 | Pressure-while-drilling measuring device and measurement method thereof |
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