CN103924992A - Concrete-filled steel tube support yielding device and utilization method thereof - Google Patents
Concrete-filled steel tube support yielding device and utilization method thereof Download PDFInfo
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- CN103924992A CN103924992A CN201410150213.2A CN201410150213A CN103924992A CN 103924992 A CN103924992 A CN 103924992A CN 201410150213 A CN201410150213 A CN 201410150213A CN 103924992 A CN103924992 A CN 103924992A
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Abstract
The invention discloses a concrete-filled steel tube support yielding device and a utilization method thereof. The concrete-filled steel tube support yielding device comprises concrete-filled steel tube components, hourglass-shaped yielding components and connection sleeves. Each hourglass-shaped yielding component is positioned between each two adjacent concrete-filled steel tube components, and the connection sleeves are positioned on the outer sides of the hourglass-shaped yielding components and enable the hourglass-shaped yielding components and the concrete-filled steel tube components to be connected together; the upper end face and the lower end face of each hourglass-shaped yielding component are provided with a plurality of anchor bars respectively, and the anchor bars are connected onto the hourglass-shaped yielding components and extend into the concrete-filled steel tube components; the lateral sides of the hourglass-shaped yielding components are provided with first grouting holes; a pair of relative displacement sensors are arranged in each hourglass-shaped yielding component; the connection sleeves are provided with second grouting holes and exhaust holes; data transmission lines of the relative displacement sensors sequentially penetrate through the first grouting holes and the exhaust holes to be connected onto a data acquisition device. The concrete-filled steel tube support yielding device is controllable in deformation and capable of preventing shearing displacement of concrete-filled steel tube components.
Description
Technical field
The present invention relates to a kind of steel pipe concrete bracket that is applied in concrete filled steel tubular member connecting portion by pressure device and using method, be applicable to the underground engineering supports such as the heavily stressed roadway with large deformation in deep, chamber and tunnel.
Background technology
At present, coal in China exploitation main producing region transfers western part to by east, and mining depth proceeds to deep by superficial part.In Xinjiang, the west area such as Ningxia, Inner Mongol, coal measures sedimentary rock mostly is the weak cementing strong expansion soft rock of argillization; It is high stressed soft rock that buried depth reaches 1000 meters of above rock stratum.There is the shortcomings such as the rear deflection of excavation is large, rate of strain fast, distortion does not restrain, supporting difficulty is large, support cost is high in the tunnel and the chamber that are arranged in this two classes soft rock strata, need to constantly reprocess maintenance.In the heavily stressed and roadway with large deformation support pattern in existing deep, steel pipe concrete bracket is a kind of effectively rigid protection structure.But, the feature that steel pipe concrete bracket rigidity is large can not adapt to the above-mentioned shortcoming of the heavily stressed roadway with large deformation in deep and chamber, when the distortion in tunnel can not get discharging for a long time, when pressure from surrounding rock that steel pipe concrete bracket bears is excessive, very easily there is brittle fracture in support, causes any property loss, casualties.In addition,, when the distortion of deep high stress tunnel can not get discharging for a long time, easily there is the geological disasters such as rock burst.Therefore, need to provide one allow pressure device, make steel pipe concrete bracket possess to a certain extent the function of the compressive strain of allowing, to adapt to the shortcoming of heavily stressed roadway with large deformation, realization allows anti-binding supporting, and country rock and supporting and protection structure are carried jointly, guarantees that tunnel or chamber realize steady in a long-term.Allow pressure effect for what realize support, Patent Office of the People's Republic of China has announced several Telescopic joint of steel pipe concrete supports at present.
The patent No. is that the utility model of ZL2011204363970 discloses a kind of Telescopic joint of steel pipe concrete support, this jiont treatment operating process complexity, and it allows the compressive strain process be the wrong bad process of fragility, has unpredictability.In addition, in use, two sections of adjacent concrete filled steel tubular members are easily sheared the changing of the relative positions to this joint, and then cause steel pipe concrete bracket entirety unstability, have certain potential safety hazard.
The patent No. is that the utility model of ZL2013200704602 discloses a kind of telescopic steel pipe concrete bracket, this retractility porous metals joint can be pressed space for support provides certain allowing, but there will be aperture stress to concentrate, two sections of adjacent concrete filled steel tubular members of joint are easily sheared the changing of the relative positions, cause the sudden overall unstability of support.
Application number be ZL2013104663540 Invention Announce a kind of steel pipe concrete bracket pressure member, this member can be realized allow preferably compressive strain, and can ensure concrete continous pouring.But this member has uncontrollable feature by the process of compressive strain, and splicing sleeve easily damages thereupon, and therefore adjacent concrete filled steel tubular member can shear the changing of the relative positions, and then causes support entirety unstability.
Application number be ZL2013104698145 Invention Announce a kind of steel pipe concrete bracket continue progressively to allow press can compression apparatus and using method thereof, this device can be realized support well progressively allows press can contracting function, but same easily generation of adjacent concrete filled steel tubular member sheared the changing of the relative positions, and then support entirety unstability.
According to New Austrian Tunneling Method and coupling supporting action principle, in the time that the support initial stage, bearing load was excessive, support must have the function of the compressive strain of allowing; Although above-mentioned contractibility joint has the pressure of allowing effect, allow the process of compressive strain be uncontrollable or uncertain, and concrete filled steel tubular member junction all likely occurs to shear the changing of the relative positions, and then cause support entirety unstability.
Summary of the invention
For Telescopic joint of steel pipe concrete support above shortcomings in prior art, the invention provides a kind of can slip casting control deformation anti-slip steel pipe concrete bracket by pressure device, its distortion is controlled, can prevent concrete filled steel tubular member to shear the changing of the relative positions, can be used for the steel pipe concrete bracket of the heavily stressed roadway with large deformation in deep, mine and chamber, construction of tunnel.
To achieve these goals, the present invention adopts following technical scheme:
Steel pipe concrete bracket is by pressure device, comprising that concrete filled steel tubular member, hourglass shape allow presses member and splicing sleeve, hourglass shape allows presses member between two adjacent concrete filled steel tubular members, and splicing sleeve is positioned at hourglass shape to be allowed and press member outside and hourglass shape is allowed and presses member and concrete filled steel tubular member to link together; The inside concrete perfusion of concrete filled steel tubular member; Hourglass shape allows presses the boring of member; Described hourglass shape allows presses the upper and lower end face place of member that several anchor bars are set respectively, and anchor bar is connected to hourglass shape and allows the inside of pressing on member and stretching into concrete filled steel tubular member; Hourglass shape allows presses the side of member to be provided with injected hole No. one; Hourglass shape allows presses the inside of member to be provided with a pair of relative displacement transducer, one of them relative displacement transducer is installed on hourglass shape and allows and press center inside the upper surface of member, another relative displacement transducer to be installed on hourglass shape to allow and press center inside the lower surface of member; Splicing sleeve is provided with No. two injected holes and steam vent, and No. two injected holes and steam vent are positioned at the opposite side of splicing sleeve; The data line of relative displacement transducer successively through injected hole draw with steam vent after be connected on data acquisition unit, data acquisition unit obtains hourglass shape and allows and press the deformation data of member.
Further, above-mentioned hourglass shape allows press on the upper and lower end face of member and is respectively equipped with the screwed hole identical with corresponding end-faces place anchor bar quantity, and anchor bar is provided with external screw thread, and anchor bar allows pressure member be threaded with hourglass shape.
Further, above-mentioned hourglass shape allows and presses the upper and lower end face of member to be respectively provided with three identical screwed holes; Three screwed holes that are positioned on same end face are distributed on three summits of an equilateral triangle, the center of equilateral triangle and the center superposition of corresponding end-faces.
Further, above-mentioned hourglass shape allows presses the upper and lower end face of member to be toroidal, and the distance between every adjacent two screwed holes is the half of corresponding end-faces diameter.
Further, by No. two injected holes, to allowing and press the space inner note Latex cement mortar between member in splicing sleeve and hourglass shape, Latex cement mortar enters hourglass shape through injected hole and allows and press the inside of member, wherein, in Latex cement mortar, the shared weight ratio of rubber is 30%.
Another object of the present invention is to propose the using method of a kind of above-mentioned steel pipe concrete bracket by pressure device, and it adopts following technical scheme:
Steel pipe concrete bracket, by a using method for pressure device, comprises following use step:
A, first anchor bar and hourglass shape are allowed and press member to link together, then by splicing sleeve, hourglass shape is allowed and presses member and adjacent two sections of concrete filled steel tubular members to link together;
B, all concrete filled steel tubular members are in turn connected into as entirety and are fixed on behind the surface in tunnel, chamber or tunnel, to concrete perfusion in concrete filled steel tubular member;
C, data acquisition unit obtain hourglass shape by relative displacement transducer and allow and press the related data that allows compressive strain amount of member, and analyze data, by the time hourglass shape allows and presses the deformation of member to be tending towards after convergence, No. two injected holes by splicing sleeve surface are to allowing and press the space note Latex cement mortar between member in splicing sleeve and hourglass shape, until space is filled; Press the distortion of member to continue not restrain if hourglass shape allows, do not need slip casting.
Further, in above-mentioned steps c, rubber shared weight ratio in Latex cement mortar is 30%.
The present invention has the following advantages:
1, prevent the shearing changing of the relative positions of steel pipe concrete bracket adjacent members by anchor bar and later stage slip casting on " resisting " in conjunction with the basis of protective function possessing " allowing ", improved the stability of steel pipe concrete bracket.
2, by relative displacement transducer can understand intuitively hourglass shape allow press member allow the situation of compressive strain, and select accordingly time for injecting, can control better allow pressure device allow pressure process.
3, allow and press member, anchor bar and splicing sleeve to form by hourglass shape, simple in structure, reasonable stress.
4, by the space cementing mortar allowing to splicing sleeve and hourglass shape after pressing member by compressive strain, and in cement mortar, to mix weight ratio be 30% rubber grain, in improving steel pipe concrete bracket drag, make the junction of concrete filled steel tubular member possess certain flexibility, improved the shock resistance of support.
Brief description of the drawings
Fig. 1 be in the present invention steel pipe concrete bracket by the side sectional view of pressure device;
Fig. 2 is that in Fig. 1, hourglass shape allows and presses the structural representation of member;
Fig. 3 is that in Fig. 2, hourglass shape allows and presses the side sectional view of member;
Wherein, 1-hourglass shape allows pressure member, 2-anchor bar, 3-splicing sleeve, 4-concrete filled steel tubular member, 5-concrete, 6-splicing sleeve and hourglass shape allow and presses injected hole of space, 7-relative displacement transducer, 8-data line, 9-, 10-screwed hole, No. bis-injected holes of 11-, the 12-steam vent between member.
Detailed description of the invention
Below in conjunction with accompanying drawing and detailed description of the invention, the present invention is described in further detail:
Shown in Fig. 1, steel pipe concrete bracket is by pressure device, comprises that hourglass shape allows to press member 1, anchor bar 2, splicing sleeve 3 and concrete filled steel tubular member 4.Hourglass shape allows presses member 1 between two adjacent concrete filled steel tubular members 4.The inside concrete perfusion of concrete filled steel tubular member 4.Hourglass shape allows presses member 1 to have upper and lower two end faces, on upper and lower end face, be respectively equipped with screwed hole 10, anchor bar 2 is provided with external screw thread, anchor bar 2 allows and presses member 1 to be together by a threaded connection with hourglass shape, then by splicing sleeve 3, hourglass shape is allowed and presses member 1 and concrete filled steel tubular member 4 to be connected in one, anchor bar 2 stretches into concrete filled steel tubular member 4 inside.
Concrete, hourglass shape allows presses member 1 to be made up of steel, length is 15cm～30cm, inside is hollow, hourglass shape allows presses the diameter of section maximum at upper and lower end face place of member 1, hourglass shape allows presses the diameter of section minimum of member 1 middle, and allow and press the upper and lower end face of member 1 to point to respectively hourglass shape to allow and press the middle of member 1 along hourglass shape, hourglass shape allows presses the diameter of section of member 1 to be to reduce trend, hourglass shape allow press the diameter of section of member 1 middle be hourglass shape allow the upper and lower end face place that presses member 1 diameter of section 1/3～1/2.Hourglass shape allows presses the diameter of section at upper and lower end face place of member 1 identical with the diameter of section of concrete filled steel tubular member 4.Hourglass shape allows presses the upper and lower end face of member 1 to be respectively provided with three identical screwed holes 10, three screwed holes 10 that are positioned on same end face (be positioned on upper surface simultaneously or be positioned on lower surface simultaneously) are distributed on three summits of an equilateral triangle, the center of this equilateral triangle overlaps with the center of circle of corresponding end-faces, and the length of side is 1/2 of corresponding end-faces diameter.Hourglass shape allows presses the side of member 1 to be provided with injected hole 9 No. one.Hourglass shape allows presses the inside of member 1 to be provided with a pair of relative displacement transducer 7, a relative displacement transducer 7 is installed on center inside upper surface, another relative displacement transducer 7 is installed on center inside lower surface, and the data line 8 of relative displacement transducer 7 is drawn by an injected hole 9.Hourglass shape allow press that member 1 can continue after upper and lower end face pressurized allow compressive strain, make steel pipe concrete bracket there is the characteristic that can contract.
Anchor bar 2 is made up of reinforcing bar, and length is 15cm～30cm, and one has 6, wherein has 3 to be positioned at hourglass shape and to allow and press the upper end surface of member 1, and other 3 are positioned at hourglass shape and allow and press the lower surface place of member 1.One end of anchor bar 2 is provided with external screw thread, is allowed and is pressed member 1 to link together securely by screwed hole 10 and hourglass shape.The effect of anchor bar 2 is, after concrete filled steel tubular member 4 concrete perfusions 5, hourglass shape is allowed and presses member 1 and concrete filled steel tubular member 4 to be connected in one, prevent that adjacent concrete filled steel tubular member 4 from the changing of the relative positions occurring to shear, and ensures the stability of steel pipe concrete bracket.
In the middle of splicing sleeve 3, be provided with the opposite side that No. two injected holes 11 and 12, No. two injected holes of steam vent 11 and steam vent 12 lay respectively at splicing sleeve 3.No. two injected holes 11 and steam vent 12 are toroidal.By No. two injected holes 11 to allowing and press the space 6 note Latex cement mortars between member 1 in splicing sleeve 3 and hourglass shape, to control the pressure process that allows, realize on the one hand allowing anti-binding supporting, can ensure that again steel pipe concrete bracket has certain flexibility and enough stability.Latex cement mortar enters hourglass shape through injected hole 9 and allows and press the inside of member 1.In Latex cement mortar, the shared weight ratio of rubber is 30%.When the effect of steam vent 12 is balance slip casting, splicing sleeve 3 and hourglass shape allow and press the air pressure inside between member 1, ensure carrying out smoothly of slip casting.The data line 8 of relative displacement transducer 7 is finally drawn by steam vent 12, and is connected with data acquisition unit, and data acquisition unit allows and presses the deformation data of member 1 for obtaining hourglass shape.
Steel pipe concrete bracket is as follows by the using method of pressure device:
6 anchor bars 2 and hourglass shape are allowed and press the screwed hole 10 of member 1 upper and lower end face to be connected, then by splicing sleeve 3, hourglass shape is allowed and presses member 1 to be connected with two sections of adjacent concrete filled steel tubular members 4, all concrete filled steel tubular members 4 are in turn connected into as entirety and are fixed on behind the surface in tunnel, chamber or tunnel, to the interior concrete perfusion 5 of concrete filled steel tubular member 4.Then allow and press the relative displacement transducer 7 of the upper and lower end face of member 1 inner side to obtain hourglass shape to allow and press the related data that allows compressive strain amount of member 1 by hourglass shape, analyze data, by the time hourglass shape allows and presses member 1 distortion to be tending towards after convergence, No. two injected holes 11 by splicing sleeve 3 surfaces are to allowing and press the space 6 note Latex cement mortars between member 1 in splicing sleeve 3 and hourglass shape, until space 6 is filled; Press the distortion of member 1 to continue not restrain if hourglass shape allows, do not need to carry out slip casting.
In the time that steel pipe concrete bracket stand under load is excessive, hourglass shape allows presses member 1 to start to allow compressive strain, the shape of this member can realize preferably steel pipe concrete bracket to continue to allow compressive strain; Hourglass shape allows presses the deflection of member 1 intuitively to represent by relative displacement transducer 7, allow the object of compressive strain initial period be " allowing ", when allowing, hourglass shape press member 1 distortion to be tending towards restraining backward internal voids injection Latex cement mortar, the main purpose of slip casting is " resisting " and control hourglass shape and allow the process that allows compressive strain of member 1 of pressing, and Latex cement mortar can make steel pipe concrete bracket possess certain flexibility, so just improved the shock resistance of support.What the present invention had realized steel pipe concrete bracket on time and space allows anti-binding supporting.
Certainly; the more than only preferred embodiment for inventing of explanation; invention is not limited to enumerate above-described embodiment; should be noted that; any those of ordinary skill in the art are under the instruction of this manual; that makes is allly equal to alternative or obvious variant, within all dropping on the essential scope of this manual, and the protection that ought to be invented.
Claims (7)
1. steel pipe concrete bracket is by pressure device, comprising that concrete filled steel tubular member, hourglass shape allow presses member and splicing sleeve, hourglass shape allows presses member between two adjacent concrete filled steel tubular members, and splicing sleeve is positioned at hourglass shape to be allowed and press member outside and hourglass shape is allowed and presses member and concrete filled steel tubular member to link together; The inside concrete perfusion of concrete filled steel tubular member; Hourglass shape allows presses the boring of member; It is characterized in that, described hourglass shape allows presses the upper and lower end face place of member that several anchor bars are set respectively, and anchor bar is connected to hourglass shape and allows the inside of pressing on member and stretching into concrete filled steel tubular member; Hourglass shape allows presses the side of member to be provided with injected hole No. one; Hourglass shape allows presses the inside of member to be provided with a pair of relative displacement transducer, one of them relative displacement transducer is installed on hourglass shape and allows and press center inside the upper surface of member, another relative displacement transducer to be installed on hourglass shape to allow and press center inside the lower surface of member; Splicing sleeve is provided with No. two injected holes and steam vent, and No. two injected holes and steam vent are positioned at the opposite side of splicing sleeve; The data line of relative displacement transducer successively through injected hole draw with steam vent after be connected on data acquisition unit, data acquisition unit obtains hourglass shape and allows and press the deformation data of member.
2. steel pipe concrete bracket according to claim 1 is by pressure device, it is characterized in that, described hourglass shape allows press on the upper and lower end face of member and is respectively equipped with the screwed hole identical with corresponding end-faces place anchor bar quantity, anchor bar is provided with external screw thread, and anchor bar allows and presses member to be threaded with hourglass shape.
3. steel pipe concrete bracket according to claim 2, by pressure device, is characterized in that, described hourglass shape allows press on the upper and lower end face of member and is respectively provided with three identical screwed holes; Three screwed holes that are positioned on same end face are distributed on three summits of an equilateral triangle, the center of equilateral triangle and the center superposition of corresponding end-faces.
4. steel pipe concrete bracket according to claim 3, by pressure device, is characterized in that, described hourglass shape allows presses the upper and lower end face of member to be toroidal, and the distance between every adjacent two screwed holes is the half of corresponding end-faces diameter.
5. steel pipe concrete bracket according to claim 1 is by pressure device, it is characterized in that, by No. two injected holes to allowing and press the space inner note Latex cement mortar between member in splicing sleeve and hourglass shape, Latex cement mortar enters hourglass shape through injected hole and allows and press the inside of member, wherein, in Latex cement mortar, the shared weight ratio of rubber is 30%.
6. steel pipe concrete bracket according to claim 1, by the using method of pressure device, is characterized in that comprising following use step:
A, first anchor bar and hourglass shape are allowed and press member to link together, then by splicing sleeve, hourglass shape is allowed and presses member and adjacent two sections of concrete filled steel tubular members to link together;
B, all concrete filled steel tubular members are in turn connected into as entirety and are fixed on behind the surface in tunnel, chamber or tunnel, to concrete perfusion in concrete filled steel tubular member;
C, data acquisition unit obtain hourglass shape by relative displacement transducer and allow and press the related data that allows compressive strain amount of member, and analyze data, by the time hourglass shape allows and presses the deformation of member to be tending towards after convergence, No. two injected holes by splicing sleeve surface are to allowing and press the space note Latex cement mortar between member in splicing sleeve and hourglass shape, until space is filled; Press the distortion of member to continue not restrain if hourglass shape allows, do not need slip casting.
7. using method according to claim 6, is characterized in that, in described step c, rubber shared weight ratio in Latex cement mortar is 30%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410150213.2A CN103924992B (en) | 2014-04-15 | 2014-04-15 | Steel pipe concrete bracket is by pressure device and application method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410150213.2A CN103924992B (en) | 2014-04-15 | 2014-04-15 | Steel pipe concrete bracket is by pressure device and application method |
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| CN103924992A true CN103924992A (en) | 2014-07-16 |
| CN103924992B CN103924992B (en) | 2018-02-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108361051A (en) * | 2018-03-09 | 2018-08-03 | 中国矿业大学(北京) | A kind of assembled allows pressure steel pipe concrete bracket and production method |
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| EP0040096A1 (en) * | 1980-05-13 | 1981-11-18 | Amco Finanz Ag | Yieldable support element |
| US20010055517A1 (en) * | 1999-04-14 | 2001-12-27 | Marianski James E. | Compressible support column |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108361051A (en) * | 2018-03-09 | 2018-08-03 | 中国矿业大学(北京) | A kind of assembled allows pressure steel pipe concrete bracket and production method |
| CN108361051B (en) * | 2018-03-09 | 2020-04-14 | 中国矿业大学(北京) | Assembled yielding concrete filled steel tube support and manufacturing method thereof |
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| CN103924992B (en) | 2018-02-06 |
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Inventor after: Li Tingchun Inventor after: Du Yiteng Inventor after: Yang Bo Inventor before: Zhang Shilin Inventor before: Li Tingchun Inventor before: Lv Xuean Inventor before: Lv Lianxun Inventor before: Chen Wei |
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