CN101906879B - Sand box device and method for unloading steel structure bracket - Google Patents
Sand box device and method for unloading steel structure bracket Download PDFInfo
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- CN101906879B CN101906879B CN2010102280121A CN201010228012A CN101906879B CN 101906879 B CN101906879 B CN 101906879B CN 2010102280121 A CN2010102280121 A CN 2010102280121A CN 201010228012 A CN201010228012 A CN 201010228012A CN 101906879 B CN101906879 B CN 101906879B
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Abstract
The invention discloses a sand box device and method for unloading a steel structure bracket, which belongs to the field of steel structure engineering construction. The sand box device comprises a piston, a sleeve and a sand flash valve, wherein the piston and the sleeve are in a long cylindrical structure; one end of the piston is provided with a supporting plate, and the other end of the piston is arranged in the sleeve; the outer wall of the piston is in close fit with the inner wall of the sleeve; the upper end of the sleeve is provided with an opening for installing the piston, and the bottom part is provided with a bottom plate for sealing an opening on the bottom part of a sleeve body; the sleeve body of the sleeve is provided with sand flash valve through which dry sand filled in the sleeve body can be discharged. When the sand box device is used in the steel structure engineering, a temporary support of a steel member can be conveniently unloaded. The invention has advantages of high safety, low cost, little pollution and convenient and fast operation.
Description
Technical field
The present invention relates to field of steel structure construction, relate in particular to a kind of flask device and method that steel structure support is unloaded.
Background technology
It is a requisite operation link in the structural steelwork that steel work supports unloading, is that steel structure system reliably carries out the transition to the stressed operation of structural body from the moulding bed support.
In the existing structural steelwork member unloaded to be loaded with and adopt jack unloading or the direct patterning method unloading of rigid support dual mode.Wherein, normal mechanical gear, the two kinds of equipment of electric hydaulic jack of adopting of jack unloading, the top lift through jack makes the steel member reach the upper and lower displacement purpose.But there is drawback in existing jack Unloading Technology: 1. the service behaviour and the feature of environmental protection are poor: because the long-term stand under load of jack; Oil hydraulic system is prone to produce hydraulic oil and reveals; Environment is polluted; The pressure loss can cause the improper cylinder motion of contracting of jack simultaneously, makes duty out of control, and structural safety is had a negative impact.2. cost of equipment is higher: need on market, lease the hydraulic jack of (purchasing) big quantity, short-term generation cost of equipment is higher.3. market source of goods restriction: use jack in a large number, the market supply source of goods can not satisfy a large amount of instructions for uses.The mechanical gear jack is to utilize the principle of bar bar to make gear produce interlock each other to realize top lift, and it is bigger to receive the human factor influence during operation, and guaranteeing of top lift is more weaker than hydraulic jack, and is not suitable for large-scale steel spare is unloaded.And no matter be that a kind of jack, in uninstall process, all need carry out " anti-top, pumping board " to realize unloading, for the unloading of large-tonnage steel structure, this operation is difficult to realize, the partial structurtes gross distortion very easily occurs, causes danger.
And adopt the direct patterning method of rigid support generally to be used for little tonnage, the unloading of little stroke operating mode; Be used in the steel work unloading; Have drawback: synchronous control accuracy is low: because of the segmentation cutting need be carried out the cutting of artificial oxy arc to support, top, because of the influence that receives cutting angle, hot melt scope, cuts circuit, accomplish the cutting in a certain stage after; On the end cut face rough score can appear, influence unloading displacement synchronous control accuracy.The input resource is many: single moulding bed debarkation station, it is more that short column quantity is set, and needs a large amount of gas welding operative employees to cut simultaneously during whole the unloading.Member finish paint damage is big: most cut points close on the member lower surface, and the high-temperature oxide that in cutting process, produces will cause the large tracts of land damage to the member finish paint, after the completion of discharge, are coated with the repairing lacquer after needing manual work to polish.
Summary of the invention
Based on above-mentioned existing in prior technology problem; The embodiment of the invention provides a kind of flask device and method that steel structure support is unloaded; Can be easily in Construction of Steel Structure the support to interim support usefulness unload, improve the safety of unloaded operation, reduce the unloading cost.
The objective of the invention is to realize through following technical proposals:
The embodiment of the invention provides a kind of flask device that steel structure support is unloaded, and comprising:
Piston, sleeve, seal member, dry sand and sand flash valve;
Said piston and sleeve are long tubular construction;
Said piston one end is provided with gripper shoe, and the piston other end is arranged in the said sleeve, and piston outer wall and said sleeve lining closely cooperate through the seal member that is provided with; Said seal member is the hoop stirrup that is fixedly installed on the sleeve top open part;
Said sleeve top is for installing the opening of said piston; The sleeve bottom is provided with the base plate of closed cylinder bottom opening; The cylindrical shell of said sleeve is provided with sand flash valve; Be filled with the dry sand that supports said piston in the cylindrical shell of said sleeve, can control the delivery flow and the volume of the said dry sand of discharging in the cylindrical shell of said sleeve through sand flash valve; Said dry sand adopts rounded grain cast iron shot;
Said sand flash valve is made up of sediment outflow pipe and bolt; The sand export that is provided with on the cylindrical shell of sediment outflow Guan Yiduan and sleeve is fixedly connected; Be communicated with in the cylindrical shell through sand export and said sleeve, be acute angle between the body of sediment outflow pipe and the horizontal direction, the other end of sediment outflow pipe is tilted to oblique below; The sediment outflow pipe is provided with the sediment outflow through hole; Sediment outflow pipe other end inwall is provided with internal thread; Bolt is arranged in the sediment outflow pipe through internal thread; The bolt front end is taper; The key of bolt is corresponding with the sediment outflow through hole on the sediment outflow pipe, through the adjustment position of bolt in the sediment outflow pipe, can open or closed said sediment outflow through hole with control sediment outflow flow and volume.
The embodiment of the invention also provides a kind of method that steel structure support is unloaded, and comprising:
Adopt above-mentioned flask device, the support that the steel member is played interim supporting role unloads;
Said flask device is arranged between the support and steel member of preparing unloading, makes flask device piston upper end hold out against the contact surface of steel member, and the short upright supports of shaped steel is set between steel member and support;
During unloading, cut off the shaped steel weak point upright supports of the certain altitude that is provided with between steel member and the support by predetermined unloading burst size;
According to predetermined unloading burst size, control the sediment outflow amount of said flask device through the sand flash valve of said flask device and come the displacement of control piston sinking, thereby the control flask device supports the sinking displacement amount of steel member;
Repeat the above-mentioned operation of cutting off the short upright supports of shaped steel and sinking,, promptly accomplish unloading the support that plays interim supporting role until accomplishing the unloading absolute altitude by predetermined unloading burst size control piston.
From the technical scheme that the invention described above embodiment provides, can find out, through piston is arranged in the sleeve, sand flash valve is set on sleeve forms flask device in the embodiment of the invention.Because sand flash valve is the structure of the sediment outflow the controlled flow that is made up of sediment outflow through hole on sediment outflow pipe, the sediment outflow pipe and bolt; Therefore; This flask device can be controlled the delivery flow and the volume of the rounded grain cast iron shot of the support piston of filling in the sleeve through sand flash valve, thus the displacement that control piston sinks along sleeve.Be used in the structural steelwork, can be easily the interim support of steel member be unloaded, the control accuracy when improving unloading, have safe, simple operation, advantage such as cost is low, and the feature of environmental protection is good.
Description of drawings
The structural representation of the flask device that Fig. 1 provides for the embodiment of the invention;
The cross-sectional view of the sleeve of the flask device that Fig. 2 provides for the embodiment of the invention;
The cross-sectional view at the sand flash valve place of the flask device that Fig. 3 provides for the embodiment of the invention;
The cross-sectional view of the flask device that Fig. 4 provides for the embodiment of the invention;
The cross-sectional view of the sand flash valve of the flask device that Fig. 5 provides for the embodiment of the invention;
Fig. 6～Fig. 9 provides the sketch map of each step of discharging method for the embodiment of the invention.
The specific embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is described further.
Present embodiment provides a kind of flask device that steel structure support is unloaded, and can in structural steelwork, unload the falsework that supports the steel member, and shown in Fig. 1～6, this flask device comprises:
Piston 1, sleeve 2, seal member, dry sand 10 and sand flash valve 3;
Wherein, said piston 1 is long tubular construction with sleeve 2, can be circular or square long tubular construction;
Said piston 1 one ends are provided with gripper shoe 4; Gripper shoe 4 is with the top encapsulation of piston 1; Piston 1 other end is arranged in the said sleeve 2; Piston 1 outer wall and said sleeve 2 inwalls closely cooperate through the seal member that is provided with, and said seal member comprises the hoop stirrup 7 that is arranged on sleeve 2 top open parts; And can in the gap, fill up dry sand; And the sealing of ketoboidies glue is adopted in the junction between piston 1 outer wall and sleeve 2; Can effectively reduce gap between the two like this, prevent that piston 1 from supporting the steel member and be under pressure after, the dry sand of the support piston of filling in the sleeve 2 is excessive from the gap;
In the reality, the gap between piston 1 outer wall and sleeve 2 inwalls should be controlled at 2～3mm, if piston outer wall and sleeve excesssive gap, can solve through following four measures: (1) sleeve top open part fixedly installs the hoop stirrup; (2) in the gap, fill up dry sand; (3) adopt the sealing of ketoboidies glue at piston outer wall and upper cartridge delivery position; Generally with the acting in conjunction that combines of four kinds of modes, can prevent in flask device transportation and the normal use, take place that dry sand is excessive to be got into the outer room rainwater.
On above-mentioned sleeve lining, can also evenly distribute and fixedly install many vertical reinforcements 8; Each vertical reinforcement 8 is provided with at interval and all is welded on the sleeve lining; Play the effect of regulating piston placed in the middle position in sleeve; Further also can reduce the gap between sleeve lining and the piston outer wall, play both effects of sealing.
As shown in Figure 2; The top of said sleeve 2 is for installing the opening 21 of said piston, and sleeve 2 bottoms are provided with the base plate 5 of closed cylinder bottom opening, and described base plate 5 is made up of inner bottom plating 52, Outer Bottom Plating 51 and vertical cross-stiffened plate 53; Inner bottom plating 52 is arranged on the Outer Bottom Plating 51 through vertical cross-stiffened plate 53; At the separated interior dry sand of filling of well that vertical cross-stiffened plate 53 forms, to strengthen the support force to inner bottom plating 52, the inwall size of the periphery of inner bottom plating 52 and sleeve 2 is complementary; After base plate 5 is installed; Inner bottom plating 52 is installed in sleeve 2 bottom end openings with vertical cross-stiffened plate 53, and the sand export 9 on the cylindrical shell of the end face of inner bottom plating 52 and sleeve 2 is in same plane, and inner bottom plating 52 is provided with sediment outflow gathering sill 54 (generally adopting arc groove) with the corresponding position of sand export 9; The dry sand of being convenient to fill in the sleeve 2 10 is discharged, and reduces residual dry sand.Can these sediment outflow gathering sill 54 inner surfaces be polished into smooth state, be convenient to dry sand and discharge.
The cylindrical shell of sleeve 2 is provided with sand flash valve 3, and is as shown in Figure 3, and sand flash valve 3 is made up of sediment outflow pipe 31 and bolt 33; Sediment outflow pipe 31 1 ends are welded on the sand export 9 that is provided with on the cylindrical shell of sleeve 2, are communicated with in the cylindrical shell through sand export 9 and said sleeve 2, and the angle of slope of falling of certain angle can be set outside the sand export 9 of cylindrical shell setting; Like this after the sediment outflow pipe is welded on the sand export 9; The openend of sediment outflow pipe 31 then tilts to oblique below, and forms the angle of an acute angle between the horizontal direction, and the angle of this angle can be according to the requirement of engineering setting; Be generally 7 °～15 ° acute angle, the sand of being convenient in the cylindrical shell of opening outflows from sand export 9 at gravity and pressure effect; Sediment outflow pipe 31 is provided with sediment outflow through hole 32; Sediment outflow pipe 31 other end inwalls are provided with internal thread; Bolt 33 is arranged in the sediment outflow pipe 31 through internal thread; The key of bolt 33 is corresponding with the sediment outflow through hole 32 on the sediment outflow pipe 31; Through the position of key sediment outflow pipe 31 in of adjustment bolt 33, can open or closed said sediment outflow through hole to control sediment outflow flow and volume; Bolt 33 front ends are taper, and the dry sand sand feed collet that can avoid discharging influences tightening or unclamping of bolt 33 between the screw thread and bolt 33 of sediment outflow pipe 31;
As shown in Figure 4; Fill the dry sand 10 that supports said piston in the cylindrical shell of described sleeve 2; For adapting to the bigger characteristics of steel construction weight; Dry sand 10 adopts rounded grain cast iron shots, can control the delivery flow and the volume of the dry sand of the support piston 1 of discharging in the cylindrical shell of sleeve 2 through sand flash valve 3, thus the displacement that control piston 1 sinks in sleeve 2.
The cylindrical shell of the sleeve of above-mentioned flask device is outer can be provided with enforced loop plane 6, can strengthen the intensity of sleeve, has improved the lateral pressure resistant supporting capacity of sleeve.
As shown in Figure 5, the sediment outflow through hole 32 on the sediment outflow pipe 31 of the sand flash valve in the above-mentioned flask device is two, on the upper and lower body that is oppositely arranged on sediment outflow pipe 31; The diameter of sediment outflow through hole 31 is generally 10mm (also can according to the diameter that the sediment outflow through hole is set as the rounded grain cast iron shot particle diameter of dry sand); Through the sediment outflow through hole 32 of this upper and lower setting, can cooperate with bolt easily, the support piston of discharging in the sleeve is used dry sand; Not only can conveniently control the sediment outflow flow; And can when adjusting sediment outflow pipe inner bolt, observe the position of bolt through the sediment outflow through hole above the sediment outflow pipe 31, improve the convenience of sediment outflow operation.Sand flash valve 3 can be provided with a plurality of, is evenly distributed on the cylindrical shell of conplane said sleeve 2.4 of operated by rotary motion are arranged on the cylindrical shell of sleeve symmetrically, can control 4 sand flash valves sediment outflow (rounded grain cast iron shot) simultaneously like this, the stationarity that keeps piston to sink.The other end opening of the sediment outflow pipe of sand flash valve is 10cm～30cm apart from the height between the base plate of sleeve bottom, is convenient to connect the rounded grain cast iron shot that the sand container collects discharge.
In the reality, when making flask device, the size that can design sandbox according to requirement of engineering with select each component materials, adding man-hour can be with reference to following each point requirement:
(1) seamless steel pipe that uses the size gap coupling forms cylinder outward as each parts main raw material(s) of sandbox processing, and is handsome in appearance, can adapt to the placing attitude of optional position, and along each to stressed uniformity;
(2) sleeve lateral wall increases enforced loop plane, to improve anti-pressure measurement supporting capacity;
(3) dry sand use in unloading: rounded grain cast iron shot (particle diameter 0.5mm) is as the special-purpose sand of unloading preferably to select flowability for use, and the raising flask device is to the steel bearing of component;
(4) sand flash valve design: 1. use the stainless steel rebar connector and carry out secondary mechanical processing: inner wall sleeve becomes the screw thread form; The bottom is provided with the sediment outflow through hole of 10mm diameter; 2. reinforced bar sleeve one end carries out 7 °～15 ° angle of slope (and the angle between the horizontal direction) processing, welds formation to the inclination of oblique below to satisfy with sleeve, plays the effect of gravity guiding sediment outflow; 3. supportingly select 10.9 grades of high-strength bolts for use; And front end processed vertebra shape; Be convenient to the sediment outflow speed controlling, and can stop rounded grain cast iron shot to get in the effective travel screw thread of high-strength bolt, prevent in executing stubborn bolt process, " stuck " phenomenon to take place as dry sand;
(5) said barrel base plate is provided with the sediment outflow gathering sill near the sand flash valve position, and this sediment outflow gathering sill can be polished and made the groove inner surface be smooth state, and the dry sand sand grains of being convenient to barrel is more discharged, and reduces residual dry sand;
(6) sealing measure: 1. the bottom uses round steel that hoop sealing hoop is set; 2. the slit between the inside and outside tube adopts the packing of cast iron shot plug real, and adopts silicone adhesive to seal fully at the top in slit, prevents that the rainwater intrusion from causing corrosion to harden to cast steel ball, and the influence unloading is with the mobile performance of sand.
The flask device of present embodiment is simple in structure; Can control sediment outflow flow and sediment outflow volume easily through the control sand flash valve; Thereby make things convenient for the sinking displacement amount of control piston, when being used in the structural steelwork falsework to the steel member and unloading, have the unloading precision and be easy to control; Need not the operation of anti-top, do not damage the advantage of steel component surface.
Present embodiment provides a kind of method that steel structure support is unloaded, and is to utilize flask device that the foregoing description 1 provides in Construction of Steel Structure, and to the method that the falsework of steel member unloads, this method comprises:
The flask device that embodiment 1 is provided is arranged between the support (the interim support of steel member) and steel member of preparing unloading, makes flask device piston upper end hold out against the contact surface of steel member, and the short upright supports of shaped steel is set between steel member and support simultaneously;
During unloading, cut off the shaped steel weak point upright supports of the certain altitude that is provided with between steel member and the support by predetermined unloading burst size;
According to predetermined unloading burst size, control the sediment outflow amount of said flask device through the sand flash valve of said flask device and come the displacement of control piston sinking, thereby the control flask device supports the sinking displacement amount of steel member;
Repeat the above-mentioned operation of cutting off the short upright supports of shaped steel and sinking,, promptly accomplish unloading the support that plays interim supporting role until accomplishing the unloading absolute altitude by predetermined unloading burst size control piston.
In conjunction with the sketch map of Fig. 6～Fig. 9, the method for above-mentioned unloading is described further:
Step a, as shown in Figure 6, in structural steelwork, lay flask device 203 and the short upright supports 201 of shaped steel that embodiment 1 provides at support 202 tops of playing interim supporting role, the absolute altitude between steel member 200 and support 202 tops is H at this moment
1
Step b, as shown in Figure 7, by predetermined discharging quantity, cutting bar-shaped short upright supports 201 tops are from short upright supports 201 apical support steel members, one tip cut-off of the shaped steel length h suitable with predetermined discharging quantity
1
Step c, as shown in Figure 8; Control flask device 203 carries out sediment outflow, makes the steel member 200 of the piston supports of flask device 203 sink down into the position that the short upright supports of shaped steel 201 tops maintain an equal level, at this moment; Steel member 200 sinks, and the absolute altitude between steel member 200 and support 202 tops is H
2
As shown in Figure 9, repeat b, two steps of c behind flask device 203 tops and 200 disengagings of steel member gap, reach unloading absolute altitude H
3, the shaped steel that gets final product striking 202 tops is lacked upright supports 201 and flask device 203, and the unloading of support 202 is accomplished.
In the reality, can each load shedding amount be subdivided into several conventional actions through the sediment outflow action, for example the load shedding amount is 12mm; Can be divided into 4 conventional sediment outflows moving (each action unloading 2mm),, after preceding 2, the 4th conventional sediment outflow action accomplished, set up the adjustment action respectively for avoiding to cause accumulative total " asynchronous " displacement error in the sediment outflow process; Unloading synchronous shift ERROR CONTROL when guaranteeing finally to accomplish is in 2mm.
Above-mentioned discharging method is compared with existing large-scale jack unloading, does not need " back, anti-top is extracted steel plate out " to realize unloading; Can realize unloading as long as make flask device " behind the sediment outflow, piston sinks ".
The flask device of the embodiment of the invention is used in the structural steelwork, has well solved following problems:
(1) solves the jack unloading because manual operation factor affecting (mechanical gear jack) and hydraulic oil are revealed big, the unfavorable drawback of controlling of stability fluctuation of the unloading performance that factors such as (hydraulic jack) causes, improve the stability that unloads performance, reliability etc.
(2) solve jack in large-tonnage, high-stroke unloading operating mode, be difficult to realize the anti-drawback of doing and possibly jeopardizing safety of structure that pushes owing to force anti-top.
(3) solve the too high shortcoming of employing jack unloading cost, reduce the cost of unloaded operation through adopting the flask device unloading.
(4) shortcoming of the direct patterning method synchronism of solution rigidity buttress control accuracy difference, through human metering sediment outflow speed, sediment outflow volume etc. are realized the good synchronisation property of uninstall process.
(5) solve the direct patterning method unloading of rigidity buttress and need a large amount of short columns and welding operation personnel, the drawback that causes high resource to drop into.
(6) solve the direct patterning method uninstall process of rigidity buttress and need carry out on-the-spot flame cutting construction, cause the excessive drawback of member finish paint damage.
(7) compare with traditional unloading manners such as jack and the direct patterning methods of rigidity buttress, need the harmonious relationships of realization unloading efficient and resource consumption, environmental protection etc., it is few to make every effort to material consumption, recyclable utilization, the theory of embodiment " low-carbon (LC) " and green construction.
In sum, the flask device of the embodiment of the invention is used in the structural steelwork when supporting the falsework unloading of steel member, has following advantage:
(1) flexibility is strong: can select suitable flask device specification to different engineering unloading characteristics;
(2) bearing capacity is big: sandbox resistance to compression bearing capacity with compare with the volume jack big approximately 2～3 times;
(3) stability in use is good: the pedestrian that goes forward side by side is segmented in the sediment outflow action be control, through controlling the moving sand volume of getting rid of of every unloading, to obtain comparatively slowly rate of debarkation uniformly;
(4) processing cost is low: material therefor is market routine building material, and it is convenient to purchase, and processes simpler and easyly, can form the streamlined production line, can process a large amount of sandbox instruments in a short time;
(5) recovery value is big: strengthen the retrieval management work of steel sand in the uninstall process, recycling is worth high, can be used as processing factory's derusting by sandblasting material.This engineering sandbox height dimension versatility is stronger, should in time deposit after finishing using, and the later stage engineering has higher recycling and is worth;
(6) workable: operating technology is simple, is convenient to the general operation personnel and grasps, and carries out suitable on-site training and can form large-scale construction, and is artificial, management cost is lower.
The above; Be merely the preferable specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, any technician who is familiar with the present technique field is in the technical scope that the present invention discloses; The variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (8)
1. the flask device that steel structure support is unloaded is characterized in that, comprising:
Piston, sleeve, seal member, dry sand and sand flash valve;
Said piston and sleeve are long tubular construction;
Said piston one end is provided with gripper shoe, and the piston other end is arranged in the said sleeve, and piston outer wall and said sleeve lining closely cooperate through the seal member that is provided with; Said seal member is the hoop stirrup that is fixedly installed on the sleeve top open part;
Said sleeve top is for installing the opening of said piston; The sleeve bottom is provided with the base plate of closed cylinder bottom opening; The cylindrical shell of said sleeve is provided with sand flash valve; Be filled with the dry sand that supports said piston in the cylindrical shell of said sleeve, can control the delivery flow and the volume of the said dry sand of discharging in the cylindrical shell of said sleeve through sand flash valve; Said dry sand adopts rounded grain cast iron shot;
Said sand flash valve is made up of sediment outflow pipe and bolt; The sand export that is provided with on the cylindrical shell of sediment outflow Guan Yiduan and sleeve is fixedly connected; Be communicated with in the cylindrical shell through sand export and said sleeve, be acute angle between the body of sediment outflow pipe and the horizontal direction, the other end of sediment outflow pipe is tilted to oblique below; The sediment outflow pipe is provided with the sediment outflow through hole; Sediment outflow pipe other end inwall is provided with internal thread; Bolt is arranged in the sediment outflow pipe through internal thread; The bolt front end is taper; The key of bolt is corresponding with the sediment outflow through hole on the sediment outflow pipe, through the adjustment position of bolt in the sediment outflow pipe, can open or closed said sediment outflow through hole with control sediment outflow flow and volume;
Sediment outflow through hole on the sediment outflow pipe of said sand flash valve is two, on the upper and lower body that is oppositely arranged on the sediment outflow pipe; The body of said sediment outflow pipe and the angle between the horizontal direction are 7 °～15 ° acute angles;
The base plate that said sleeve bottom is provided with the closed cylinder bottom opening comprises:
Outer Bottom Plating, inner bottom plating and vertical cross-stiffened plate;
Said inner bottom plating supports through vertical cross-stiffened plate and is provided with on the Outer Bottom Plating; The periphery of inner bottom plating and the inwall of said sleeve adapt; Said inner bottom plating all is arranged in the sleeve bottom end opening with vertical cross-stiffened plate; Sand export on the end face of inner bottom plating and the cylindrical shell of said sleeve is in same plane, and the corresponding position of inner bottom plating and sand export is provided with the sediment outflow gathering sill.
2. the flask device that steel structure support is unloaded as claimed in claim 1 is characterized in that, said piston and sleeve are circular or square long tubular construction.
3. according to claim 1 or claim 2 the flask device that steel structure support is unloaded is characterized in that the cylindrical shell of said sleeve is provided with enforced loop plane outward; A plurality of equally distributed vertical reinforcements are set on the cylinder inboard wall of said sleeve.
4. according to claim 1 or claim 2 the flask device that steel structure support is unloaded is characterized in that the sealing of ketoboidies glue is adopted in the junction between said piston outer wall and the sleeve.
5. the flask device that steel structure support is unloaded as claimed in claim 1 is characterized in that, said sand flash valve is a plurality of, is evenly distributed on the cylindrical shell of conplane said sleeve.
6. the flask device that steel structure support is unloaded as claimed in claim 1 is characterized in that, the other end opening of the sediment outflow pipe of said sand flash valve is 10cm～30cm apart from the height between the base plate of sleeve bottom.
7. the method that steel structure support is unloaded is characterized in that, comprising:
Adopt aforesaid right to require 1～6 each described flask device, the support of support steel structure is unloaded;
Said flask device is arranged between the support and steel member of preparing unloading, makes flask device piston upper end hold out against the contact surface of steel member, and the short upright supports of shaped steel is set between steel member and support;
During unloading, cut off the shaped steel weak point upright supports of the certain altitude that is provided with between steel member and the support by predetermined unloading burst size;
According to predetermined unloading burst size, control the sediment outflow amount of said flask device through the sand flash valve of said flask device and come the displacement of control piston sinking, thereby the control flask device supports the sinking displacement amount of steel member;
Repeat the above-mentioned operation of cutting off the short upright supports of shaped steel and sinking,, promptly accomplish unloading the support of interim support until accomplishing the unloading absolute altitude by predetermined unloading burst size control piston.
8. the method that steel structure support is unloaded as claimed in claim 7 is characterized in that, controls the sediment outflow amount of said flask device through the sand flash valve of said flask device and comes the displacement of control piston sinking to be:
The position of bolt in the sediment outflow pipe of sand flash valve of the sand flash valve through adjusting said flask device; Open or close sediment outflow through hole on the sediment outflow pipe; The delivery flow and the volume of the dry sand of the piston of the propping sand case apparatus of filling in the control flask device, thereby the piston of control flask device and go up the sinking displacement amount of the steel member that supports.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102280121A CN101906879B (en) | 2010-07-08 | 2010-07-08 | Sand box device and method for unloading steel structure bracket |
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| CN2010102280121A CN101906879B (en) | 2010-07-08 | 2010-07-08 | Sand box device and method for unloading steel structure bracket |
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| CN101906879A CN101906879A (en) | 2010-12-08 |
| CN101906879B true CN101906879B (en) | 2012-06-27 |
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| CN101280631A (en) * | 2008-04-02 | 2008-10-08 | 中铁建工集团有限公司 | Supporting apparatus for building |
| CN201144395Y (en) * | 2007-12-29 | 2008-11-05 | 中国葛洲坝集团股份有限公司 | Steel structure sand box temporary support for continuous bridge |
| CN101424128A (en) * | 2008-12-12 | 2009-05-06 | 中建三局建设工程股份有限公司 | Civil engineering construction flask device |
| CN201771195U (en) * | 2010-07-08 | 2011-03-23 | 中建钢构有限公司 | Sand box device for unloading steel structural support |
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| JPS5520856A (en) * | 1978-07-31 | 1980-02-14 | Yutaka Tada | Method of holding molding flask* and implement for assembling anchorage member |
| JPS55111562A (en) * | 1979-02-20 | 1980-08-28 | Tanaka Sekkei Kk | Method of placing concrete* molding flask therefor* and masking material for said flask |
| CN200949208Y (en) * | 2005-07-21 | 2007-09-19 | 项利兵 | Column type lifting bridge pier |
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|---|---|---|---|---|
| CN201095873Y (en) * | 2007-08-14 | 2008-08-06 | 中国化学工程第三建设公司 | Load bearing steel grit box easy for unloading |
| CN201144395Y (en) * | 2007-12-29 | 2008-11-05 | 中国葛洲坝集团股份有限公司 | Steel structure sand box temporary support for continuous bridge |
| CN101280631A (en) * | 2008-04-02 | 2008-10-08 | 中铁建工集团有限公司 | Supporting apparatus for building |
| CN101424128A (en) * | 2008-12-12 | 2009-05-06 | 中建三局建设工程股份有限公司 | Civil engineering construction flask device |
| CN201771195U (en) * | 2010-07-08 | 2011-03-23 | 中建钢构有限公司 | Sand box device for unloading steel structural support |
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| JP昭55-20856A 1980.02.14 |
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