CN104480946A - Double-anchor-bearing adjusting device for supporting in foundation pit work and construction method - Google Patents

Double-anchor-bearing adjusting device for supporting in foundation pit work and construction method Download PDF

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Publication number
CN104480946A
CN104480946A CN201410648046.4A CN201410648046A CN104480946A CN 104480946 A CN104480946 A CN 104480946A CN 201410648046 A CN201410648046 A CN 201410648046A CN 104480946 A CN104480946 A CN 104480946A
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China
Prior art keywords
cup
shaped base
brace rod
movable brace
cone
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Granted
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CN201410648046.4A
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CN104480946B (en
Inventor
张明聚
李家云
苑媛
陈晓帆
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Beijing University of Technology
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Beijing University of Technology
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00Excavations; Bordering of excavations; Making embankments
    • E02D17/02Foundation pits
    • E02D17/04Bordering surfacing or stiffening the sides of foundation pits

Abstract

The invention provides a double-anchor-bearing adjusting device for supporting in a foundation pit work and a construction method. The double-anchor-bearing adjusting device is that jack pallets are arranged at both sides of the cross sections of thick-wall steel pipes and welded on flanges at the thick-wall steel pipes and a cup-shaped base; knurls are processed in the outer wall surfaces of movable supporting rods; the flanges at the movable supporting rods are welded at one of the ends of circular solid steels; a movable supporting rod reinforcing rib plate is welded between each circular solid steel and the flange at each movable supporting rod; the movable supporting rods are inserted into the cup-shaped base, then tapered clamping sheets are welded into an opening of the cup-shaped base, and the outer wall of each tapered clamping sheet is in contact with the inclined surface of the opening of the cup-shaped base and while the inner wall of each tapered clamping sheet is in contact with frictional surfaces of the knurls in the movable supporting rods; when in loading, the tapered clamping sheets are extruded and integrally mesh to form the double-anchor-bearing adjusting device; two anchor bearings support and bear the force together under the longitudinal section of the double-anchor-bearing adjusting device; two thick-wall steel pipes are welded on the flange at the cup-shaped base, two circular solid steels which are concentric with the thick-wall steel pipes are welded on the flanges at the movable supporting rods; the thick-wall steel pipes are concentric with the flanges at the cup-shaped base. The double-anchor-bearing adjusting device is simple in structural form, light in weight and low in cost.

Description

A kind of active device of two anchoring parts for base pit engineering inner support and apply method
Technical field
The present invention relates to a kind of active device of two anchoring parts for base pit engineering inner support, for applying brace pre axial force to bracing members, belonging to capital construction auxiliary work-piece technical field.
Background technology
Foundation pit steel support extensive use in the construction of cut and cover method, in installation bracing members process, the applying of brace pre axial force moves significant to control formation water prosposition, and current bracing members applies pre-suppressive jamming and adopts the active device of Double-cylinder jack support top or the active device of single cylinder jack support top.These two kinds of methods all, after applying brace pre axial force with jack, squeeze into gad block, after stable, remove jack.The shortcoming of the active device of this two class is: gad mode of transfer force is unreliable, and easily cause stress to concentrate and eccentric force, node is unstable, and globality is poor.Particularly when stratum soil property is softer, stratum, bracing members place, upper strata easily occurs, to the distortion outside foundation ditch, causing bracing members loose or dislocation.Along with being on the increase of China's building foundation pit, the problem of bracing members system globality difference urgently to be resolved hurrily, therefore the active device of bracing members needs research to adopt new structure, to strengthen bracing members rigidity and to ensure that bearing capacity is reliable.
Summary of the invention
Based on the problems referred to above, the present invention proposes a kind of active device of two anchoring parts for base pit engineering inner support, frictional force is produced and bracing members axle power is born and transmitted to snap-in force by the extruding between high-strength cone-shaped clip and movable brace rod, press tighter and tighter between movable brace rod and cup-shaped base, both anchorings is got up, and solves that present bracing members system globality is poor, the insecure problem of power transmission.The movable brace rod of the active device of two anchoring part and cone-shaped clip, cone-shaped clip and cup-shaped base are all plane-plane contacts, change the some connected mode that traditional active device squeezes into gad, can effectively bear bracing members axial pressure, also can bear the pulling force that soil layer is outwards out of shape, enclose purlin and bracing members globality is improved.
Technical scheme of the present invention is as follows:
A kind of active device of two anchoring parts for base pit engineering inner support comprises cup-shaped base 1, cone-shaped clip 3, movable brace rod 2; Cup-shaped base 1 comprises thick walled steel tube 16, cup-shaped base place flange 6, screw block carrier 9; Thick walled steel tube 16 one end of cup-shaped base 1 is welded with cup-shaped base place flange 6; Be provided with screw block carrier 9 in thick walled steel tube 16 cross section both sides, screw block carrier 9 is welded on thick walled steel tube 16 with on cup-shaped base place flange 6; Movable brace rod 2 comprises solid round steel 17, movable brace rod place flange 7, and movable brace rod outside wall surface is processed with annular knurl 4; Solid round steel 17 one end is welded with movable brace rod place flange 7, is welded with movable brace rod and puts more energy into floor 8 between solid round steel 17 and movable brace rod place flange 7; The thick walled steel tube 16 of cup-shaped base 1 and the solid round steel concentric of movable brace rod 2, and movable brace rod 2 inserts closely connected in cup-shaped base 1 and retractable.Cone-shaped clip 3 is bored sheet by ring-type and is formed, cut formation opening, and a circumference ring-type cone sheet is divided into three pieces of intermediate plates, and the inwall of cone-shaped clip 3 is also processed with annular knurl 4.Movable brace rod 2 is inserted in cup-shaped base 1, cup-shaped base 1 rim of a cup is wedged again by cone-shaped clip 3, tap web intermediate plate 3 outer wall and cup-shaped base 1 rim of a cup contact of incline plane, cone-shaped clip 3 inwall contacts with movable brace rod 2 knurled friction surface, and being interlocked by cone-shaped clip 3 extruding during loading forms two active device 12 of anchoring part.
The two ends of the active device 12 of two anchoring part and cup-shaped base place flange 6, movable brace rod place flange 7 are connected with bracing members 5 respectively.Two anchoring part active device 12 longitudinal section is stressed by two anchoring part common support, cup-shaped base place flange 6 is welded with two thick walled steel tubes 16, movable brace rod place flange 7 is welded with two solid round steel 17, thick walled steel tube 16 and solid round steel 17 concentric; Two thick walled steel tube 16 positions of the active device 12 of two anchoring part become in-lines to arrange, thick walled steel tube 16 center of circle be arranged in cup-shaped base place flange 6 radius be 150mm circumferentially.
Further, described movable brace rod length is 300 ~ 500mm, and described movable brace rod top flange thickness is 20 ~ 30mm, crosses ambassador's movable brace rod top flange local occur large deformation for preventing bracing members axle power.
Further, the described cone-shaped clip strength of materials is higher than the strength of materials of movable brace rod and cup-shaped base, and the described length often organizing cone-shaped clip is 150 ~ 200mm, should ensure enough antagonization frictions, ensures that material is not damaged by pressure again.Movable brace rod outer wall and cone-shaped clip internal ring wall surface through annular knurl process, to improve skin-friction coefficient.
Further, described cup-shaped base length is 300 ~ 500mm.
Further, the thickness of described cup-shaped base place flange is 20 ~ 30mm, crosses flange local, ambassador's cup-shaped base place occur large deformation in order to prevent bracing members axle power.
Further, two thick walled steel tube positions of the described pair of active device of anchoring part become in-lines to arrange, the thick walled steel tube center of circle be arranged in cup-shaped base place flange radius be 150mm ~ 250mm circumferentially.
Compared with prior art, the present invention has following beneficial effect:
1. the present invention proposes the active device of two anchoring parts that a kind of base pit engineering inner support stablizes connection, instead of the way that traditional active device squeezes into firm wedge, ensure that the globality of foundation pit supporting system, pulling force can not be born by existing connection to be modified into and can to bear the structure that axial compression also can bear pulling force, reduce the risk that bracing members comes off;
2. the present invention proposes the active device of two anchoring parts that a kind of base pit engineering inner support stablizes connection, form of structure is simple, and lightweight, cost is low.Meanwhile, this member processing process is simple, easy to assembly, can meet inner support pressure-bearing and tension, guarantee use safety;
3. the present invention proposes the active device of two anchoring parts that a kind of base pit engineering inner support stablizes connection, cone-shaped clip is divided into three pieces, is convenient to the occlusion assembling and be conducive to contact surface, technology is reasonable, workable, comprehensive benefit is remarkable, has important engineer applied and is worth and development prospect;
Accompanying drawing explanation
Fig. 1 is the front elevational schematic of the two active device of anchoring part of the present invention;
Fig. 2 is the schematic top plan view of the two active device of anchoring part of the present invention;
Fig. 3 is that jack of the present invention applies brace pre axial force schematic diagram;
Fig. 4 is that schematic diagram is looked on the two active device left side of anchoring part of the present invention;
Fig. 5 is that schematic diagram is looked on the two active device right side of anchoring part of the present invention;
Fig. 6 is the front elevational schematic of cup-shaped base of the present invention;
Fig. 7 is the schematic top plan view of cup-shaped base of the present invention;
Fig. 8 is the front elevational schematic of cone-shaped clip of the present invention;
Fig. 9 is the schematic top plan view of cone-shaped clip of the present invention;
Figure 10 is that schematic diagram is looked on the right side of cone-shaped clip of the present invention;
Figure 11 is the front elevational schematic of movable brace rod of the present invention;
Figure 12 is the schematic top plan view of movable brace rod of the present invention;
Figure 13 is the integral assembling schematic diagram of bracing members of the present invention;
In figure, put more energy into floor, 9-screw block carrier, 10-jack, 11-jack piston position, the active device of 12-bis-anchoring part, 13-bracing members fixed-segment, 14-steel of 1-cup-shaped base, 2-movable brace rod, 3-cone-shaped clip, 4-annular knurl, 5-bracing members, 6-cup-shaped base place flange, 7-movable brace rod place flange, 8-movable brace rod encloses purlin, 15-diaphragm wall, 16-thick walled steel tube, 17-solid round steel
Detailed description of the invention
By example below, as shown in figures 1-13, the invention will be further described.
A kind of active device of two anchoring parts for base pit engineering inner support of the present invention, design bracing members greatest axis power 2000kN, safety factor is 1.5, to provide certain safety stock, prevents incidental load and stratum deformation is excessive etc. causes engineering accident unexpectedly.
A kind of active device of two anchoring parts for base pit engineering inner support comprises cup-shaped base 1, cone-shaped clip 3, movable brace rod 2; Cup-shaped base 1 comprises thick walled steel tube 16, cup-shaped base place flange 6, screw block carrier 9; Thick walled steel tube 16 one end of cup-shaped base 1 is welded with cup-shaped base place flange 6; Be provided with screw block carrier 9 in thick walled steel tube 16 cross section both sides, screw block carrier 9 is welded on thick walled steel tube 16 with on cup-shaped base place flange 6; Movable brace rod 2 comprises solid round steel 17, movable brace rod place flange 7, and movable brace rod outside wall surface is processed with annular knurl 4; Solid round steel 17 one end is welded with movable brace rod place flange 7, is welded with movable brace rod and puts more energy into floor 8 between solid round steel 17 and movable brace rod place flange 7; The thick walled steel tube 16 of cup-shaped base 1 and the solid round steel concentric of movable brace rod 2, and movable brace rod 2 inserts closely connected in cup-shaped base 1 and retractable.Cone-shaped clip 3 is bored sheet by ring-type and is formed, cut formation opening, and a circumference ring-type cone sheet is divided into three pieces of intermediate plates, and the inwall of cone-shaped clip 3 is also processed with annular knurl 4.Movable brace rod 2 is inserted in cup-shaped base 1, cup-shaped base 1 rim of a cup is wedged again by cone-shaped clip 3, tap web intermediate plate 3 outer wall and cup-shaped base 1 rim of a cup contact of incline plane, cone-shaped clip 3 inwall contacts with movable brace rod 2 knurled friction surface, and being interlocked by cone-shaped clip 3 extruding during loading forms two active device 12 of anchoring part.
The two ends of the active device 12 of two anchoring part and cup-shaped base place flange 6, movable brace rod place flange 7 are connected with bracing members 5 respectively.Two anchoring part active device 12 longitudinal section is stressed by two anchoring part common support, cup-shaped base place flange 6 is welded with two thick walled steel tubes 16, movable brace rod place flange 7 is welded with two solid round steel 17, thick walled steel tube 16 and solid round steel 17 concentric; Two thick walled steel tube 16 positions of the active device 12 of two anchoring part become in-lines to arrange, thick walled steel tube 16 center of circle be arranged in cup-shaped base place flange 6 radius be 150mm circumferentially.
Concrete processing and fabricating and installation process as follows:
Step one: cup-shaped base 1 makes: two thick walled steel tubes are 200mm by diameter respectively, thickness is that the Q235 thick walled steel tube of 30mm processes, length is 300mm, and the gradual change from medium position of thick walled steel tube inwall expands and forms rim of a cup shape, and rim of a cup steel pipe thickness is 20mm.Need and movable brace rod 2 concentric after making the thick walled steel tube processing of cup-shaped base, the thick walled steel tube internal diameter of cup-shaped base is equal to movable brace rod 2 filled circles steel external diameter.The cup-shaped base place flange 6 that cup-shaped base 1 one end welding 20mm is thick, at cup-shaped base place flange 6 cross section symmetrical position welding screw block carrier 9, screw block carrier 9 length is equal with jack 10 oil cylinder height.
Step 2: movable brace rod 2 makes: the solid round steel of Q235 that two solid round steel are 140mm by diameter respectively processes, and length is 400mm, and solid round steel external surface carries out annular knurl process, and annular knurl length is 350mm.Welding 20mm thick movable brace rod place, solid round steel one end flange 7, welds movable brace rod and to put more energy into floor 8 between solid round steel with movable brace rod place flange 7.
Step 3: cone-shaped clip 3 makes: two cover cone-shaped clips are that 13.5mmQ345 steel pipe processes by diameter 167mm thickness respectively, and length is 200mm, cone-shaped clip outer wall gradual change turning to 200mm, cone-shaped clip outer wall and cup-shaped base rim of a cup contact surface closely connected.Inwall carries out annular knurl process, and ring-type cone sheet is cut forms opening, and a circumference ring-type cone sheet is divided into three pieces of intermediate plates.
Step 4: the connection of cup-shaped base 1 and movable brace rod 2: inserted in cup-shaped base 1 by movable brace rod 2, then by cone-shaped clip 3 tentatively wedging cup-shaped base 1 rim of a cup, makes it extruding and is interlocked and forms two active device 12 of anchoring part.
Step 5: in the foundation ditch applying diaphragm wall 15, active for two anchoring parts of processing and fabricating device 12, the bracing members fixed-segment 13 made in advance and bracing members 5 are transported to job site, bracing members 5 is assembled in advance before installing, assembled deviation should meet designing requirement or related specifications regulation, and the installation eccentric axis of every root bracing members 5 is not more than 20mm.
Step 6: apparatus measures is located, enclose on purlin 14 at steel and accurately install bracing members fixed-segment 13, bolt is not tightened.
Step 7: adopt the assembled bracing members 5 of straddle truck, and two active device 12 of anchoring part is installed, active for two anchoring part device 12 two ends are connected with bracing members 5 respectively, check the connection state of each node.
Step 8: the jack 10 selecting suitable tonnage, detection must be carried out before using jack 10 demarcate, accurately be placed on the screw block carrier 9 of cup-shaped base 1 by jack 10, lifting certain length makes jack 10 align jack piston position 11, has without acceptance of persons for checking; Adjusting instrument, hydraulic pump must with pressure meter, with the speed of the pressure of hydraulic control pump and pressurization.
Step 9: pressurize step by step according to the brace pre axial force of design, extend between two flanges, movable brace rod 2 stretches out thereupon, check bracing members 5 and steel enclose purlin 14 have without exception after, tighten the bolt of bracing members fixed-segment 13.
Step 10: when brace pre axial force reaches setting value, brace pre axial force acts on movable brace rod 2, passes to bracing members 5, achieve the applying to bracing members axle power by cone-shaped clip 3, cup-shaped base 1.Locking jack 10, then two anchoring part active device 12 cone-shaped clip 3 of wedging, slowly removes jack 10.
Be more than a representative instance of the present invention, enforcement of the present invention is not limited thereto.

Claims (6)

1. for the active device of two anchoring parts of base pit engineering inner support, it is characterized in that: this pair of active device of anchoring part comprises cup-shaped base (1), cone-shaped clip (3), movable brace rod (2); Cup-shaped base (1) comprises thick walled steel tube (16), cup-shaped base place flange (6), screw block carrier (9); Thick walled steel tube (16) one end of cup-shaped base (1) is welded with cup-shaped base place flange (6); Be provided with screw block carrier (9) in thick walled steel tube (16) cross section both sides, screw block carrier (9) is welded on thick walled steel tube (16) with in cup-shaped base place flange (6); Movable brace rod (2) comprises solid round steel (17), movable brace rod place flange (7), and movable brace rod outside wall surface is processed with annular knurl (4); Solid round steel (17) other end is welded with movable brace rod place flange (7), is welded with movable brace rod and puts more energy into floor (8) between solid round steel (17) and movable brace rod place flange (7); The thick walled steel tube (16) of cup-shaped base (1) and the solid round steel concentric of movable brace rod (2), and movable brace rod (2) inserts closely connected in cup-shaped base (1) and retractable; Cone-shaped clip (3) is bored sheet by ring-type and is formed, cut formation opening, and a circumference ring-type cone sheet is divided into three pieces of intermediate plates, and the inwall of cone-shaped clip (3) is also processed with annular knurl (4); Movable brace rod (2) is inserted in cup-shaped base (1), again by cone-shaped clip (3) wedging cup-shaped base (1) rim of a cup, tap web intermediate plate (3) outer wall and cup-shaped base (1) rim of a cup contact of incline plane, cone-shaped clip (3) inwall contacts with movable brace rod (2) knurled friction surface, and being interlocked by cone-shaped clip (3) extruding during loading forms two active device of anchoring part (12);
The two ends of the active device of two anchoring part (12) and cup-shaped base place flange (6), movable brace rod place flange (7) are connected with bracing members (5) respectively; The active device of two anchoring part (12) longitudinal section is stressed by two anchoring part common support, cup-shaped base place flange (6) is welded with two thick walled steel tubes (16), movable brace rod place flange (7) is welded with two solid round steel (17), thick walled steel tube (16) and solid round steel (17) concentric; Two thick walled steel tube (16) positions of the active device of two anchoring part (12) become in-lines to arrange, thick walled steel tube (16) center of circle be arranged in cup-shaped base place flange (6) radius be 150mm circumferentially.
2. the active device of two anchoring parts for base pit engineering inner support applies a method, it is characterized in that: the concrete processing and fabricating of the method and installation process as follows,
Step one: cup-shaped base (1) makes: two thick walled steel tubes are 200mm by diameter respectively, thickness is that the Q235 thick walled steel tube of 30mm processes, length is 300mm, and the gradual change from medium position of thick walled steel tube inwall expands and forms rim of a cup shape, and rim of a cup steel pipe thickness is 20mm; Need and movable brace rod (2) concentric after making the thick walled steel tube processing of cup-shaped base, the thick walled steel tube internal diameter of cup-shaped base is equal to movable brace rod (2) filled circles steel external diameter; Cup-shaped base place flange (6) that cup-shaped base (1) one end welding 20mm is thick, symmetrical position welding screw block carrier (9) of cup-shaped base place flange (6) cross section, screw block carrier (9) length is equal with jack (10) oil cylinder height;
Step 2: movable brace rod (2) makes: the solid round steel of Q235 that two solid round steel are 140mm by diameter respectively processes, and length is 400mm, and solid round steel external surface carries out annular knurl process, and annular knurl length is 350mm; Solid round steel one end welding 20mm thick movable brace rod place flange (7), welds movable brace rod and to put more energy into floor (8) between solid round steel with movable brace rod place flange (7);
Step 3: cone-shaped clip (3) makes: two cover cone-shaped clips are that 13.5mmQ345 steel pipe processes by diameter 167mm thickness respectively, length is 200mm, cone-shaped clip outer wall gradual change turning to 200mm, cone-shaped clip outer wall and cup-shaped base rim of a cup contact surface closely connected; Inwall carries out annular knurl process, and ring-type cone sheet is cut forms opening, and a circumference ring-type cone sheet is divided into three pieces of intermediate plates;
Step 4: the connection of cup-shaped base (1) and movable brace rod (2): movable brace rod (2) is inserted in cup-shaped base (1), tentatively wedge cup-shaped base (1) rim of a cup by cone-shaped clip (3) again, make it extruding and be interlocked and form two active device of anchoring part (12);
Step 5: in the foundation ditch applying diaphragm wall (15), the active device of two anchoring parts (12) of processing and fabricating, the bracing members fixed-segment (13) made in advance and bracing members (5) are transported to job site, bracing members (5) is assembled in advance before installing, assembled deviation should meet designing requirement or related specifications regulation, and the installation eccentric axis of every root bracing members (5) is not more than 20mm;
Step 6: apparatus measures is located, enclose upper accurately installation bracing members fixed-segment (13) of purlin (14) at steel, bolt is not tightened;
Step 7: adopt the assembled bracing members of straddle truck (5), and two active device of anchoring part (12) is installed, active for two anchoring part device (12) two ends are connected with bracing members (5) respectively, check the connection state of each node;
Step 8: the jack (10) selecting suitable tonnage, use jack (10) is front must carry out detection demarcation, accurately jack (10) is placed on the screw block carrier (9) of cup-shaped base (1), lifting certain length makes jack (10) align jack piston position (11), has without acceptance of persons for checking; Adjusting instrument, hydraulic pump must with pressure meter, with the speed of the pressure of hydraulic control pump and pressurization;
Step 9: pressurize step by step according to the brace pre axial force of design, extend between two flanges, movable brace rod (2) stretches out thereupon, check bracing members (5) and steel enclose purlin (14) have without exception after, tighten the bolt of bracing members fixed-segment (13);
Step 10: when brace pre axial force reaches setting value, brace pre axial force acts on movable brace rod (2), pass to bracing members (5) by cone-shaped clip (3), cup-shaped base (1), achieve the applying to bracing members axle power; Locking jack (10), then the two active device of anchoring part (12) cone-shaped clip (3) of wedging, slowly removes jack (10).
3. a kind of active device of two anchoring parts for base pit engineering inner support according to claim 1, it is characterized in that: described movable brace rod (2) length is 300 ~ 500mm, the thickness of described movable brace rod place flange (7) is 20 ~ 30mm.
4. a kind of active device of two anchoring parts for base pit engineering inner support according to claim 1, it is characterized in that: described cone-shaped clip (3) strength of materials is higher than the strength of materials of movable brace rod (2) and cup-shaped base (1), the described length often organizing cone-shaped clip (3) is 150 ~ 200mm.
5. a kind of active device of two anchoring parts for base pit engineering inner support according to claim 1, is characterized in that: described cup-shaped base (1) length is 300 ~ 500mm.
6. a kind of active device of two anchoring parts for base pit engineering inner support according to claim 1, is characterized in that: the thickness of described cup-shaped base place flange (6) is 20 ~ 30mm.
CN201410648046.4A 2014-11-15 2014-11-15 A kind of active device of double anchoring parts for base pit engineering inner support and apply method Active CN104480946B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104912086A (en) * 2015-06-30 2015-09-16 北京工业大学 Dual support-leg clamp-plate-type adjusting device used for temporary roof-propping construction
CN111549795A (en) * 2020-05-28 2020-08-18 浙江明思特建筑支护技术有限公司 Parallel combined type supporting head

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KR100841640B1 (en) * 2007-10-15 2008-06-26 이태영 Cylinder type jack
CN201339192Y (en) * 2008-12-30 2009-11-04 天津第三市政公路工程有限公司 Double-inclined plane and double-steel wedge supporting movable head unit
CN102345295A (en) * 2010-07-29 2012-02-08 上海市第五建筑有限公司 Pit supporting system and installation method
CN202577312U (en) * 2012-03-22 2012-12-05 浙江华铁建筑安全科技股份有限公司 Double-footstock cone-locking movable end
CN203066997U (en) * 2013-03-06 2013-07-17 天津市通顺盛钢管有限公司 Steel support loose end
CN203654299U (en) * 2014-01-02 2014-06-18 中铁三局集团有限公司 Steel support loose end

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100841640B1 (en) * 2007-10-15 2008-06-26 이태영 Cylinder type jack
CN201339192Y (en) * 2008-12-30 2009-11-04 天津第三市政公路工程有限公司 Double-inclined plane and double-steel wedge supporting movable head unit
CN102345295A (en) * 2010-07-29 2012-02-08 上海市第五建筑有限公司 Pit supporting system and installation method
CN202577312U (en) * 2012-03-22 2012-12-05 浙江华铁建筑安全科技股份有限公司 Double-footstock cone-locking movable end
CN203066997U (en) * 2013-03-06 2013-07-17 天津市通顺盛钢管有限公司 Steel support loose end
CN203654299U (en) * 2014-01-02 2014-06-18 中铁三局集团有限公司 Steel support loose end

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104912086A (en) * 2015-06-30 2015-09-16 北京工业大学 Dual support-leg clamp-plate-type adjusting device used for temporary roof-propping construction
CN111549795A (en) * 2020-05-28 2020-08-18 浙江明思特建筑支护技术有限公司 Parallel combined type supporting head
CN111549795B (en) * 2020-05-28 2021-07-27 浙江明思特建筑支护技术有限公司 Parallel combined type supporting head

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