CN104533106B - Single layered stereo is prefabricated with excavation of foundation pit assembling sunk type construction cat ladder and construction method - Google Patents
Single layered stereo is prefabricated with excavation of foundation pit assembling sunk type construction cat ladder and construction method Download PDFInfo
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Abstract
The present invention relates to a kind of single layered stereo prefabricated with excavation of foundation pit assembling sunk type construction cat ladder and construction method, this cat ladder is assembled by cat ladder agent structure the most multiple monolayer cat ladder and vertical stability mechanism, steady sinking mechanism.Cat ladder agent structure is by the steel cat ladder prefabricated components of single layered stereo, with being positioned at the connecting tube in four corners of steel cat ladder side elevation, wearing bolt and be linked and packed into multilamellar entirety cat ladder.Vertical stability mechanism is mutually twisted by the guide rail being fixed on ground-connecting-wall side elevation upper end and the slide rail that is fixed on cat ladder side elevation and constitutes.The nose that hangs on bottle gouard moved by hands that steadily sinking mechanism by the hanging beam being welded on guiderail base, hangs on hanging beam and cat ladder is constituted.The present invention is during grooving, and flood installs pre-manufactured steel cat ladder the most successively, along with the continuous intensification of foundation ditch, utilizes the sinking lifting beam device self assembled to be sunk the most voluntarily by cat ladder at any time；Can in deep foundation pit construction quick, convenient, economic lower channel of setting up, safe and reliable.
Description
Technical field
The present invention relates to a kind of making building underground engineering deep pit construction cat ladder and installation, prefabricated with excavation of foundation pit assembling sunk type construction cat ladder and construction method particularly to a kind of single layered stereo.
Background technology
At present, along with the development of town and country construction, the complexity of the underground engineering scale such as subway, subterranean tunnel, underground parking and structure continues to increase；Foundation depth is deep, typically at about 20 meters, and earth excavation long construction period, usually about 1 to two year, it has also become the principal character of large deep foundation pit construction the most inverse method construction.In deeper underground engineering construction, the safety of construct up and down for guarantee the unimpeded of passage and workmen, occur in that monolayer is prefabricated and reassembled integral steel cat ladder；But this steel cat ladder after excavation of foundation pit completes, then can only fold the installation of sieve formula from bottom to top from substrate；In the dynamic process that earth excavation, substrate absolute altitude are constantly deepened, scaffolding steel pipe can only be used to set up provisional cat ladder as vertical construction passage, its rigidity is little, deformation is big, it is not easy to workman carry tool materials and pass through up and down, or on the wall of hole, sets up simple and crude cat ladder in Excavation Process temporarily；The most not only there is potential safety hazard, it is also difficult to adapt to the needs of speed of application.
Therefore it provides a kind of simple in construction, reasonable in design, easy and simple to handle, the reliable single layered stereo of performance safety are prefabricated with excavation of foundation pit assembling sunk type construction cat ladder and construction method, it it is one of the technical barrier that should address of this skilled person.
Summary of the invention
It is an object of the invention to overcome above-mentioned weak point, it is provided that a kind of simple in construction, reasonable in design, easy and simple to handle, the reliable single layered stereo of performance safety is prefabricated with excavation of foundation pit assembling sunk type construction cat ladder and construction method.
The technical solution adopted in the present invention is for achieving the above object: a kind of single layered stereo is prefabricated with excavation of foundation pit assembling sunk type construction cat ladder, it is characterized in that this cat ladder is prefabricated assembled component, monomer profile is cube structure, is i.e. assembled by multiple simple cuboidal bodily form steel cat ladders and vertical stability mechanism, three parts of steady sinking mechanism；
Described cat ladder agent structure is by the steel cat ladder prefabricated components of multiple simple cuboidal bodies, by being positioned at the connecting tube in four corners of steel cat ladder side elevation, wearing bolt and be linked and packed into multilamellar entirety cat ladder；
Described vertical stability mechanism is mutually twisted by the guide rail being fixed on ground-connecting-wall side elevation upper end and the slide rail that is fixed on cat ladder side elevation and constitutes；
The nose that hangs on bottle gouard moved by hands that described steady sinking mechanism by the hanging beam being welded on guiderail base, hangs on hanging beam and cat ladder connects and composes；
This cat ladder agent structure passes through the guide rail of vertical stability mechanism, slide rail, and steadily the hanging beam of sinking mechanism, the bottle gouard moved by hands shape that is slidably connected is integral.
Described guide rail is composed of a fixed connection by guiderail base, orbit of guide rail, base connecting plate；Described base connecting plate is positioned at bottom, and it is fixed with guiderail base, and guiderail base side is welded with orbit of guide rail；Described slide rail passes in the middle of two guide rails；And with expansion bolt, guide rail is fixed on ground-connecting-wall side elevation.
Described hanging beam is welded on guiderail base, and bottle gouard moved by hands hangs on hanging beam, hooks be connected with the nose that hangs of cat ladder both sides.
Described cant beam, step on and on plate, be correspondingly provided with guardrail.
The prefabricated construction method with excavation of foundation pit assembling sunk type construction cat ladder of a kind of single layered stereo, implements step as follows:
Step one: foundation depth reaches the height of a monolayer cat ladder；
Guide rail is installed in ground-connecting-wall upper end；
Guiderail base welds hanging beam；
By in place for the lifting of ground floor cat ladder, cat ladder slide rail is penetrated in orbit of guide rail；
Step 2: hang up properly bottle gouard moved by hands on hanging beam, hook first cat ladder hangs nose, puts on location pin on slide rail；
Second layer cat ladder is installed, in the connecting tube in four corners, wears bolt fastening；
Continue grooving, make foundation depth reach the height of two monolayer cat ladders；
Step 3: cat ladder two ends each upper people synchronize to pull the jack on the bottle gouard moved by hands of cat ladder two ends, makes cat ladder steadily sink to the degree of depth of two monolayer cat ladders；Location pin on slide rail to be extracted before sinking, sinks and is plugged location pin again after putting in place；
Step 4: install third layer cat ladder, wears bolt fastening in the connecting tube in four corners；
Bottle gouard moved by hands suspension hook is extractd from ground floor cat ladder, upwards gos up, hook second layer cat ladder and hang nose；
Step 5: continuing grooving, foundation depth reaches the height of three monolayer cat ladders；
Step 6: cat ladder two ends each upper people synchronize to pull the jack on the bottle gouard moved by hands of cat ladder two ends, makes cat ladder steadily sink to the degree of depth of three monolayer cat ladders；Location pin on slide rail to be extracted before sinking, sinks and is plugged location pin after putting in place again, then installs upper strata cat ladder；
Repeat said procedure, until it reaches bottom land designed elevation i.e. completes.
The invention has the beneficial effects as follows: the present invention be a kind of can be in the dynamic process of excavation of foundation pit, the solid prefabricated assembled steel cat ladder sunk the most voluntarily with constantly deepening of base depth.This sinking assembled cat ladder can install sinking the most from top to bottom with the intensification of foundation ditch, the construction vertical channel that continual offer is formal, solves the difficult point of construction at present well；I.e. change conventional flood pre-manufactured steel cat ladder and need to the most successively fold, after grooving completes, the program that sieve is installed from bottom land.The present invention is in the middle of grooving is carried out, and on foundation trench top, needs according to construction speed, and monolayer installs pre-manufactured steel cat ladder the most successively, along with the continuous intensification of foundation ditch, utilizes the sinking lifting beam device self assembled to be sunk the most voluntarily by cat ladder at any time.The most once can sink about 3 meters, the height of i.e. one prefabricated single layered stereo cat ladder, but from security consideration, for preventing accidental falling accident from occurring, should often dig deep 0.3 meter of sinking the most safe and reliable in the range of cat ladder plan-position.After foundation ditch reaches certain depth, when exceeding hanging beam bearing capacity such as cat ladder overall weight, sinking mode changes sinking type into, cuts the earth, utilize cat ladder to sink voluntarily from gravity bottom cat ladder.Thus captured the difficult point of vertical construction passage Fast Installation in underground engineering Deep Excavation, to accelerating construction progress, reduce construction cost, improve civilized construction level and play strong facilitation, be the invention of great significance innovation in the realm of building construction.
The present invention is quick, convenient, economical in Deep Excavation to set up lower channel, it is provided that single layered stereo is prefabricated with excavation of foundation pit assembling sunk type construction cat ladder, is greatly improved installation accuracy.Owing to present configuration is detachable, has enough to meet the need, reuse, thus effectively save resource, economic and practical.
In a word, its simple in construction, reasonable in design, easy construction, performance safety is reliable, applied widely, applies effect highly significant.
Accompanying drawing explanation
Fig. 1 is layout floor map of the present invention；
Fig. 2 is monolayer cat ladder elevational schematic view of the present invention；
Fig. 3 is the left elevational schematic view of monolayer cat ladder of the present invention；
Fig. 4 is the right elevational schematic view of monolayer cat ladder of the present invention；
Fig. 5 is that cat ladder of the present invention is connected floor map with ground-connecting-wall；
Fig. 6 is that cat ladder of the present invention is connected side elevation schematic diagram with ground-connecting-wall；
Fig. 7 is component guide level schematic diagram of the present invention；
Fig. 8 is component rail-sides elevational schematic view of the present invention；
Fig. 9 is component hanging beam structural representation of the present invention；
Figure 10 is cat ladder of the present invention assembling and 1-4 step sinking operating mode schematic diagram；
Figure 11 is cat ladder of the present invention assembling and 4-6 step sinking operating mode schematic diagram.
In figure: 1 longitudinal edge frame, 2 transverse frames, 3 crossbeams, 4 stile frames, 5 slide rails, 5-1 pin hole, 6 cant beams, 7 step on plate, 8 connecting tubes, 9 bolts, 10 platform riblets, 11 landing slab faces, 12 guardrails, 13 bridgings, 14 connecting plates one, 15 connecting plates two, 16 connecting plates three, 17 hang nose, 18 horizontal braces one, 19 horizontal braces two, 20 guide rails, 20-1 guiderail base, 20-2 base connecting plate, 20-3 orbit of guide rail, 20-4 guide rail anchor hole, 20-5 hangs hole, 21 hanging beams, 21-1 hanging beam top boom, 21-2 hanging beam lower boom, 21-3 hanging beam gusset one, 21-4 hanging beam gusset two, 22 alignment pins are fastened, 23 expansion bolts, 24 bottle gouards moved by hands.
Detailed description of the invention
Below in conjunction with accompanying drawing and preferred embodiment, to detailed description of the invention, the structure provided according to the present invention, details are as follows for feature:
As shown in Fig. 1～Figure 11, a kind of single layered stereo is prefabricated with excavation of foundation pit assembling sunk type construction cat ladder, this attachment structure includes with lower member: with digging deep sinking flood prefabricated assembled deep basal pit cat ladder profile as cube structure, by multiple single layered stereo cat ladders, vertical stability mechanism and steadily sinking mechanism assemble.
As shown in Figure 1 to 4, cat ladder agent structure is by the steel cat ladder prefabricated components of multiple single layered stereos, with being positioned at the connecting tube 8 in four corners of steel cat ladder side elevation, wearing bolt 9 and be linked and packed into multilamellar entirety cat ladder, as shown in Figure 10, Figure 11.
As shown in Fig. 5～Fig. 8, vertical stability mechanism is mutually twisted by the guide rail 20 being fixed on ground-connecting-wall side elevation upper end and the slide rail 5 that is welded on cat ladder side elevation and constitutes；Its effect is that cat ladder is carried out horizontal restraint, and no matter cat ladder remains static or sinks in dynamic process, all can keep the plumbness of cat ladder main body.Described guide rail 20 is welded to form by guiderail base 20-1, orbit of guide rail 20-3, base connecting plate 20-2.Described base connecting plate 20-2 is positioned at bottom, and it is welded with guiderail base 20-1, and guiderail base 20-1 opposite side is welded with orbit of guide rail 20-3, and slide rail 5 passes in the middle of two guide rails 20.After pulling out location pin, slide rail 5 can slide up and down, but horizontal direction is by the position constraint of guide rail 20, as shown in Figure 7, Figure 8；Guide rail 20 uses expansion bolt 23 to be fixed on ground-connecting-wall side elevation.
As it is shown in figure 9, steadily sinking mechanism is made up of the nose 17 that hangs on the hanging beam 21 being welded on guiderail base 20-1, the bottle gouard moved by hands 24 hung on hanging beam 21 and cat ladder.Hanging beam 21 is triangular form rock-steady structure, can bear steel cat ladder gravity load, and bottle gouard moved by hands completes to sink to providing power for lifting cat ladder, and its stroke is greater than the height of a monolayer cat ladder.
Setting and the concrete action character of all parts in this cat ladder are as follows:
In Fig. 1～Fig. 4: longitudinal edge frame 1, transverse frame 2, stile frame 4 all make of angle steel, and crossbeam 3 makes of channel-section steel.Longitudinal edge frame 1, transverse frame 2, crossbeam 3 are the horizontal bars of composition cat ladder space framework；Stile frame 4 is the vertical bar of composition cat ladder space framework.They are by being welded to each other the cube frame defining prefabricated monolayer cat ladder.
In Fig. 1～Fig. 4: connecting tube 8, to be vertically welded on four corners of steel cat ladder framework side elevation, is inside worn bolt 9 and single layered stereo cat ladder is linked and packed into multilamellar entirety cat ladder.
In Fig. 2: cant beam 6, to step on plate 7 be the main flexural member that cat ladder tiltedly runs, make of band iron.Cant beam 6 two ends are welded with crossbeam 3, step on plate 7 two ends and weld with cant beam 6.
In Fig. 2: platform riblet 10, landing slab face 11 are the flexural members of landing, make of angle steel and iron plate, weld with cant beam 6.
In Fig. 2: described cant beam 6, step on and be correspondingly provided with guardrail 12 on plate 7.Guardrail 12 uses steel pipe manufacturing, is welded on cant beam 6 side elevation, plays the protective effect preventing personnel from falling.
In Fig. 1, Fig. 3: slide rail 5 I-shaped steel is made.Slide rail 5 one side wing edge is vertically welded on the stile frame 4 being positioned at ground-connecting-wall side, and slide rail 5 is middle through two guide rails 20 being fixed on ground-connecting-wall, sees Fig. 5, is retrained by horizontal direction, makes no matter cat ladder all keeps stable plumbness when sinking or putting in place.
In Fig. 3, Fig. 4, Fig. 6: pin hole 5-1 is positioned on slide rail 5 web axis, pin hole 5-1 spacing 300.After cat ladder sinks and puts in place, pin 22 will be positioned, see Fig. 7, and through pin hole 5-1, cat ladder can be hung and be fixed on ground-connecting-wall sidewall.
In Fig. 3, Fig. 4: bridging 13 makes of angle steel, it is positioned at three-dimensional monolayer cat ladder two side elevation, is welded by connecting plate 1, connecting plate 2 15, connecting plate 3 16, be connected with cat ladder frame corner, cat ladder framework is made to form geometry unchanged body, it is ensured that self body steady statue of cat ladder.
In Fig. 2, Fig. 4: horizontal brace 1, horizontal brace 2 19 angle steel makes, being the horizontal member linked with adjacent members in the middle part of stile frame 4, Main Function is the lateral deformation after constraint stile frame 4 pressurized, keeps stablizing of vertical rod.
Fig. 5, Fig. 6 represent cat ladder, guide rail 20, hanging beam 21 and the plane of ground-connecting-wall and side elevation position relationship.Hanging beam 21 is positioned at the both sides of cat ladder, is welded on guiderail base 20-1.Guiderail base 20-1 is fixed on ground-connecting-wall by wearing expansion bolt 23.The slide rail 5 being welded on cat ladder passes in the middle of guide rail 20, thus retrains cat ladder and keep plumbness in sinking watching.
Fig. 7, Fig. 8 are rail configurations plane and elevation, and orbit of guide rail 20-3 uses square steel to make, and is vertically welded on guiderail base 20-1.Slide rail 5 passes in the middle of orbit of guide rail 20-3, thus controls cat ladder and keep plumbness at any time.After cat ladder sinks and puts in place, between orbit of guide rail 20-3 and slide rail 5, wear location pin 22, make cat ladder be suspended on ground-connecting-wall sidewall, keep resting state.
Fig. 9 is the hanging beam detail of construction, and hanging beam is the triangle geometry invariant being welded into angle steel, and wherein guiderail base 20-1 angle steel makes, and doubles as the composition component into hanging beam
In Fig. 9: guide rail anchor hole 20-4 is in the perforation on guiderail base 20-1, base connecting plate 20-2, is the bolt penetration hole being fixed on ground-connecting-wall by guide rail.
In Fig. 9: hanging hole 20-5 is in the perforation on hanging beam gusset two 21-4 of hanging beam 21 front end, is used for hanging bottle gouard moved by hands 24.
In Fig. 9: hanging beam top boom 21-1, make of angle steel, be positioned at hanging beam top, bear axle center pulling force.
In Fig. 9: hanging beam lower boom 21-2, make of angle steel, be positioned at hanging beam bottom, bear axial pressure.
In Fig. 9: hanging beam gusset one 21-3, make of iron plate, the connection between guiderail base 20-1 and hanging beam top boom 21-1.
In Fig. 9: hanging beam gusset two 21-4, make of iron plate, the connection between hanging beam top boom 21-1 and hanging beam lower boom 21-2.
As shown in Figure 10, Figure 11, it is somebody's turn to do, with the construction method digging deep sinking flood prefabricated assembled deep basal pit cat ladder, be embodied as step as follows:
Step one: (operating mode I) foundation depth reaches the height of a monolayer cat ladder；
Guide rail 20 is installed in ground-connecting-wall upper end；Guiderail base 20-1 welds hanging beam 21；
By in place for the lifting of ground floor cat ladder, cat ladder slide rail 5 is penetrated in orbit of guide rail 20-3；
Step 2: (operating mode II) hangs up properly bottle gouard moved by hands 24 on hanging beam, hook first cat ladder hangs nose 17, puts on location pin 22 on slide rail 5；
Second layer cat ladder is installed, in the connecting tube 8 in four corners, wears bolt 9 fasten；
Continue grooving, make foundation depth reach the height of two monolayer cat ladders；
Step 3: (operating mode III) cat ladder two ends each upper people synchronize to pull the jack on cat ladder two ends bottle gouard moved by hands 24, makes cat ladder steadily sink to the degree of depth of two monolayer cat ladders；Location pin 22 on slide rail 5 to be extracted before sinking, sinks to being plugged after putting in place location pin 22 again；
Step 4: (operating mode IV) installs third layer cat ladder, wears bolt 9 and fasten in the connecting tube 8 in four corners；
Bottle gouard moved by hands 24 suspension hook is extractd from ground floor cat ladder, upwards gos up, hook second layer cat ladder and hang nose 17；
Step 5: (operating mode V) continues grooving, and foundation depth reaches the height of three monolayer cat ladders；
Step 6: (operating mode VI) cat ladder two ends each upper people synchronize to pull the jack on cat ladder two ends bottle gouard moved by hands 24, makes cat ladder steadily sink to the degree of depth of three monolayer cat ladders；Location pin 22 on slide rail 5 to be extracted before sinking, sinks to being plugged after putting in place location pin 22 again, then installs upper strata cat ladder；
Repeat said procedure, until it reaches bottom land designed elevation i.e. completes.
Present configuration design principle and feature:
During deep basal pit grooving in the past, provisional can only set up simple and crude construction cat ladder, what not only impact was constructed is smoothed out, and the problem that there is potential safety hazard.This invention solves the problems referred to above, standardized steel cat ladder can be made to sink with foundation depth change in time, provide the construction passage up and down of formal safety for underground engineering, improve civilized construction level in Excavation Process.Its prefabrication and assembly construction degree is high, and installation rate is fast, can remove without breakage, reuses in other underground engineerings, to accelerating construction progress, reduces construction cost, increases economic efficiency and achieve noticeable achievement.
The present invention, during building underground engineering deep pit construction, flood prefabrication and assembly construction, constantly digs, with foundation ditch, the construction cat ladder deeply and voluntarily sunk.Its reasonable in design, performance safety are reliable；Setting can carry out respective change as required, and application is convenient, applies effect highly significant.
Above-mentioned with reference to the embodiment detailed description that with excavation of foundation pit assembling sunk type construction cat ladder and construction method carry out prefabricated to single layered stereo, it is illustrative rather than determinate；Therefore changing and modifications under without departing from present general inventive concept, within should belonging to protection scope of the present invention.
Claims (2)
1. a single layered stereo is prefabricated with excavation of foundation pit assembling sunk type construction cat ladder, it is characterized in that this cat ladder is prefabricated assembled component, monomer profile is cube structure, is i.e. assembled by multiple simple cuboidal bodily form steel cat ladders and vertical stability mechanism, three parts of steady sinking mechanism；
The agent structure of described cat ladder is by the steel cat ladder prefabricated components of multiple simple cuboidal bodies, by being positioned at the connecting tube in four corners of steel cat ladder side elevation, wearing bolt and be linked and packed into multilamellar entirety cat ladder；
Described vertical stability mechanism is mutually twisted by the guide rail being fixed on ground-connecting-wall side elevation upper end and the slide rail that is fixed on cat ladder side elevation and constitutes；
The nose that hangs on bottle gouard moved by hands that described steady sinking mechanism by the hanging beam being welded on guiderail base, hangs on hanging beam and cat ladder connects and composes；
The agent structure of this cat ladder passes through the guide rail of vertical stability mechanism, slide rail, and steadily the hanging beam of sinking mechanism, the bottle gouard moved by hands shape that is slidably connected is integral；
Described guide rail is composed of a fixed connection by guiderail base, orbit of guide rail, base connecting plate；Described base connecting plate is positioned at bottom, and it is fixed with guiderail base, and guiderail base side is welded with orbit of guide rail；Described slide rail passes in the middle of two guide rails；And with expansion bolt, guide rail is fixed on ground-connecting-wall side elevation；
Described hanging beam is welded on guiderail base, and bottle gouard moved by hands hangs on hanging beam, hooks be connected with the nose that hangs of cat ladder both sides；
Longitudinal edge frame that described steel cat ladder prefabricated components include, transverse frame, crossbeam are the horizontal bars of composition cat ladder space framework；Stile frame is the vertical bar of composition cat ladder space framework；They are by being welded to each other the cube frame defining prefabricated monolayer cat ladder；The cant beam two ends of cat ladder and beam welding, step on plate two ends and weld with cant beam；Described cant beam, step on and on plate, be correspondingly provided with guardrail.
2. the prefabricated construction method with excavation of foundation pit assembling sunk type construction cat ladder of single layered stereo according to claim 1, it is characterised in that implement step as follows:
Step one: foundation depth reaches the height of a monolayer cat ladder；
Guide rail is installed in ground-connecting-wall upper end；
Guiderail base welds hanging beam；
By in place for the lifting of ground floor cat ladder, cat ladder slide rail is penetrated in orbit of guide rail；
Step 2: hang up properly bottle gouard moved by hands on hanging beam, hook first cat ladder hangs nose, puts on location pin on slide rail；
Second layer cat ladder is installed, in the connecting tube in four corners, wears bolt fastening；
Continue grooving, make foundation depth reach the height of two monolayer cat ladders；
Step 3: cat ladder two ends each upper people synchronize to pull the jack on the bottle gouard moved by hands of cat ladder two ends, makes cat ladder steadily sink to the degree of depth of two monolayer cat ladders；Location pin on slide rail to be extracted before sinking, sinks and is plugged location pin again after putting in place；
Step 4: install third layer cat ladder, wears bolt fastening in the connecting tube in four corners；
Bottle gouard moved by hands suspension hook is extractd from ground floor cat ladder, upwards gos up, hook second layer cat ladder and hang nose；
Step 5: continuing grooving, foundation depth reaches the height of three monolayer cat ladders；
Step 6: cat ladder two ends each upper people synchronize to pull the jack on the bottle gouard moved by hands of cat ladder two ends, makes cat ladder steadily sink to the degree of depth of three monolayer cat ladders；Location pin on slide rail to be extracted before sinking, sinks and is plugged location pin after putting in place again, then installs upper strata cat ladder；
Repeat said procedure, until it reaches bottom land designed elevation i.e. completes.
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| CN201410795805.XA CN104533106B (en) | 2014-12-22 | 2014-12-22 | Single layered stereo is prefabricated with excavation of foundation pit assembling sunk type construction cat ladder and construction method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105113509A (en) * | 2015-04-24 | 2015-12-02 | 北京卓良模板有限公司 | Tool type foundation pit suspended step ladder |
| CN107217867A (en) * | 2017-07-21 | 2017-09-29 | 中国二十冶集团有限公司 | It is a kind of to be used for the preparation method of high-altitude operation platform ladder cage up and down |
| CN109610886A (en) * | 2018-12-06 | 2019-04-12 | 中铁隧道集团二处有限公司 | A kind of construction method installed from top to bottom for deep basal pit vertical shaft cage ladder |
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| CN2212037Y (en) * | 1994-12-20 | 1995-11-08 | 中国建筑第三工程局第二建筑安装工程公司 | Mulitfunction high speed wellhead by hydraulic lift |
| US7971408B2 (en) * | 2004-05-27 | 2011-07-05 | Hayes Sr Richard | Stairtower and method for erecting the same |
| CN202215006U (en) * | 2011-09-07 | 2012-05-09 | 中国建筑土木建设有限公司路桥分公司 | Tool-type fixed ladder for construction |
| CN203487767U (en) * | 2013-09-03 | 2014-03-19 | 中建一局集团建设发展有限公司 | Cross plate scaffold |
| CN103628700A (en) * | 2013-11-08 | 2014-03-12 | 中天建设集团有限公司 | Detachable stairway for construction |
| CN203729571U (en) * | 2014-01-10 | 2014-07-23 | 中建四局第一建筑工程有限公司 | Tool type crawling ladder used for construction site |
| CN204000932U (en) * | 2014-06-03 | 2014-12-10 | 天津市达森城交钢结构有限公司 | Lower channel in safety in a kind of deep foundation pit construction operation |
| CN204590035U (en) * | 2014-12-22 | 2015-08-26 | 天津二建建筑工程有限公司 | Single layered stereo is prefabricated with excavation of foundation pit assembling sunk type construction cat ladder |
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