CN102864795B - Light steel factory post foundation suitable for sedimentation of filled-in ground and construction method - Google Patents
Light steel factory post foundation suitable for sedimentation of filled-in ground and construction method Download PDFInfo
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- CN102864795B CN102864795B CN201210399823.7A CN201210399823A CN102864795B CN 102864795 B CN102864795 B CN 102864795B CN 201210399823 A CN201210399823 A CN 201210399823A CN 102864795 B CN102864795 B CN 102864795B
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Abstract
The invention discloses a light steel factory post foundation suitable for sedimentation of filled-in ground and a construction method. The post foundation comprises a connecting rebar, a post bottom plate, a steel base plate, a precast cushion block and an independent under-post foundation; wherein the post bottom plate, the steel base plate, the precast cushion block and the independent under-post foundation are arranged from top to bottom in sequence; the connecting rebar comprises a top screw rod rebar, a middle screw rod rebar and a bottom drift bolt screw rod rebar; when the filled-in ground sediments, the top screw rod rebar and the middle screw rod rebar can be dismantled; the post bottom plate is jacked and restored to an original design elevation by a jack through the steel base plate, and a gap between the post bottom plate and the independent under-post foundation is filled by the precast cushion block. The light steel factory post foundation is reasonable in structure, convenient to construct, safe and reliable; height of a post bottom can be freely adjusted according to the requirement; adverse effects on construction of the conventional light steel factory post foundation and normal use of a structure caused by foundation sedimentation can be effectively solved, and the light steel factory post foundation has a good economic benefit and a time benefit in engineering construction.
Description
Technical field
The present invention relates to the foundation structure of a kind of light steel mill pillars of a house, relate in particular to padded construction method after a kind of light Steel-Structure Factory with Steel patten that adapts to filled ground sedimentation and sedimentation thereof.
Background technology
In the Mountain Urban Area of hypsography injustice, carry out industrial district construction, during smooth location, often dig greatly and fill out greatly, and be limited to construction costs and construction period, often be difficult to accomplish to ram packing in fact, if steel-structure factory building is built in the embankment district that does not meet compaction quality requirement, while building before filled ground sedimentation is unstable, its sedimentation will directly cause basis to produce corresponding sedimentation, thereby in superstructure, produce harmful secondary stress, and superstructure and building are deformed, cracking or unstability etc., thereby have a strong impact on structural safety work, therefore often need this filled ground to carry out ground processing or adopt the relatively high pile foundation of cost that load is passed among stratum stable under fill stratum, so all need to pay more economic cost.If wait for that uncompacted filled ground settlement stability carries out steel-structure factory building construction again, required wait is banketed the fixed time, from just starting to banket, count generally at least about more than 5 years, as after waiting for that recent fill is fixed and completing, build again, the time cost of paying is more expensive.
Therefore, need to transform the design and construction scheme of the light Steel-Structure Factory with Steel patten on existing filled ground, at the bottom of the sedimentation that can guarantee filled ground does not cause post, absolute altitude does not reduce, and can also be reliably connected with superstructure post after increasing, guarantee the top-down reliable delivery of load and superstructure safety, avoid thus the relatively high ground processing of cost and pile foundation or strip foundation construction scheme even to wait for banketing fixed completing the more expensive loss of time that construction causes again.
Summary of the invention
For prior art above shortcomings, at the bottom of the present invention solves light Steel-Structure Factory with Steel patten on existing filled ground and causes post with the sedimentation meeting of filled ground, absolute altitude reduces, cause light Steel-Structure Factory with Steel superstructure and building deforms, cracking or unstability, have a strong impact on structural safety work, and adopt the construction that prior art produces to cause the high problem of maintenance cost, and a kind of light Steel-Structure Factory with Steel patten that adapts to filled ground sedimentation is provided.
Another object of the present invention is carried out padded construction method after being to provide a kind of light Steel-Structure Factory with Steel patten sedimentation that adopts the sedimentation of described adaptation filled ground.
Solve described problem, the technical solution used in the present invention is: a kind of light Steel-Structure Factory with Steel patten that adapts to filled ground sedimentation, it is characterized in that, comprise connecting reinforcement and the column base plate setting gradually from top to bottom, billet, precast lining and independent foundation under column, described connecting reinforcement comprises top screws reinforcing bar and bottom crab-bolt screw rod reinforcing bar, and described top screws reinforcing bar and bottom crab-bolt screw rod reinforcing bar removably connect by branch sleeve; Described column base plate is for the i iron steel column of fixing light Steel-Structure Factory with Steel;
The array that is provided with described column base plate, billet and precast lining runs through the via hole of column base plate, billet and precast lining, by connecting reinforcement, through after described via hole, column base plate, billet, precast lining and independent foundation under column is connected as a single entity; The upper end of described top screws reinforcing bar is fixed by double nut and nut backing plate and column base plate, and the lower end of top screws reinforcing bar is threaded by branch sleeve with the upper end of bottom crab-bolt screw rod reinforcing bar; Lower end and the concrete foundation anchor connection of bottom crab-bolt screw rod reinforcing bar;
Described billet has the position of growing above the relative both sides of precast lining.
Further, described precast lining is steel plate, cement mortar bedding block or concrete pad.
Further, described via hole is 4 groups.
Further, the bottom of described bottom crab-bolt screw rod reinforcing bar has kink.
Further, described precast lining is a plurality of, described connecting reinforcement comprises top screws reinforcing bar, middle part screw rod reinforcing bar, bottom crab-bolt screw rod reinforcing bar, and described top screws reinforcing bar, middle part screw rod reinforcing bar and bottom crab-bolt screw rod reinforcing bar are threaded by branch sleeve.
A padded construction method after the sedimentation of above-mentioned light Steel-Structure Factory with Steel patten, comprises the steps:
1), after the sedimentation of banketing, first dismantle top screws reinforcing bar upper end double nut and nut backing plate, and take out top screws reinforcing bar;
2), by the position of growing of the billet of top, the relative both sides of precast lining is applied to active force, column base plate is increased to design elevation at the bottom of the former post before foundation settlement;
3) between billet and independent foundation under column, be packed to again the precast lining with via hole that quantity, thickness and intensity are suitable;
4) remove active force, column base plate is padded to design elevation at the bottom of former post by precast lining;
5) the top screws reinforcing bar after adopting length adjustment suitable is connected fastening by branch sleeve with bottom crab-bolt screw rod screw thread steel after through column base plate, billet, precast lining; Finally in the end of top screws reinforcing bar, insert nut backing plate fastening by double nut and column base plate, complete thus the padded adjustment process after filled ground sedimentation occurs.
Further, when the position of growing of the billet of top, the relative both sides of precast lining is applied to active force, jack is placed in to the billet below, position of growing, by jack, directly billet is carried out to jacking.
A padded construction method after the sedimentation of above-mentioned light Steel-Structure Factory with Steel patten, comprises the steps:
1), after the sedimentation of banketing, first dismantle double nut and the nut backing plate of top screws reinforcing bar upper end, and take out top screws reinforcing bar;
2), by the position of growing of the billet of top, the relative both sides of precast lining is applied to active force, column base plate is increased to design elevation at the bottom of the former post before foundation settlement;
3) again the middle part screw rod reinforcing bar of the suitable TBE (threaded both ends) of length adjustment is coupled together by branch sleeve and bottom crab-bolt screw rod reinforcing bar, and at the branch sleeve between fastening good itself and top shank of bolt reinforcing bar above the screw rod reinforcing bar of middle part; The reinforcing bar top connecting from these penetrates the precast lining with via hole that quantity, thickness and intensity are suitable;
4) remove active force, column base plate is padded to design elevation at the bottom of former post by precast lining;
5) top screws reinforcing bar is connected fastening by branch sleeve with middle part screw rod screw thread steel through after column base plate, billet; Finally in the end of top screws reinforcing bar, insert nut backing plate fastening by double nut and column base plate, complete thus the padded adjustment process after filled ground sedimentation occurs.
Further, make quadrilateral frame, when the position of growing of the billet of top, the relative both sides of precast lining is applied to active force, by two frameworks, be inserted in respectively the position of growing of billet both sides, then adopt two steel poles through two corners of two framework top margins, and jack pair steel pole is set on the ground carries out jacking, thereby framework is carried out to jacking, and then billet and column base plate are carried out to jacking.
Compared to existing technology, the present invention has following beneficial effect:
1, the present invention is rational in infrastructure, easy construction, can be as required height at the bottom of adjustable column at any time.
2, adopt the inventive method, can carry out at any time engineering construction banketing not yet to complete in fixed, simultaneously under the Qing steel mill pillars of a house without adopting cost high pile foundation, strip foundation or carrying out ground processing, only need to adopt conventional shallow foundation, reach economy, safe and reliable, easy construction is object efficiently.
3, when filled ground and column footing generation sedimentation, because light Steel-Structure Factory with Steel superstructure is lighter, by this structure, can adopt jack pair factory building columns to carry out jacking, clog in the billet producing after simultaneously adopting precast lining to jacking and the gap between independent foundation under column, and change the top screws reinforcing bar being of convenient length or increase middle part screw rod reinforcing bar, again by column base plate and under billet, precast lining and independent foundation under column couple together by connecting reinforcement, adopt in this way, generation along with the sedimentation of banketing, at any time can be by jacking at the bottom of post to former absolute altitude, until banket afterwards for many years, Settlement Consolidation is stable, avoid thus the adverse effect that the superstructure of absolute altitude and light Steel-Structure Factory with Steel causes at the bottom of the sedimentation coupled columns of filled ground.
4, this invention can effectively solve all difficulties that cause because of foundation settlement in light Steel-Structure Factory with Steel patten construction on conventional filled ground, has good economic benefit and time benefit, and easy construction is safe and reliable.
5, the present invention is applied widely, is not only applicable to filled ground, is also applicable to the project situation such as the light Steel-Structure Factory with Steel malformation in top, cracking or unstability that the uneven settlement of foundation in soft foundation and various situation causes.
Accompanying drawing explanation
Fig. 1 is the structural representation on basis of the present invention;
Fig. 2 is the structural representation after increase on basis of the present invention.
The specific embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
Embodiment 1: as shown in Figure 1, a kind of light Steel-Structure Factory with Steel patten that adapts to filled ground sedimentation, comprises the column base plate 1, the billet 2 that set gradually from top to bottom
,precast lining 3
,independent foundation under column 4 (described independent foundation under column 4 is generally made by concrete or Reinforced Concrete Materials) and connecting reinforcement, described connecting reinforcement comprises top screws reinforcing bar 5 and bottom crab-bolt screw rod reinforcing bar 6, described top screws reinforcing bar 5 removably connects by branch sleeve 7 with bottom crab-bolt screw rod reinforcing bar 6, during concrete enforcement, adopt mechanical sleeve to be connected, more firm; The i iron steel column 8 of light Steel-Structure Factory with Steel is fixedly connected with column base plate 1.Described precast lining 3 is steel plate, cement mortar bedding block or concrete pad, make the intensity of precast lining 3 can meet structure stress needs, the material of this precast lining 3, thickness are selected (to be generally less than employing steel plate or the steel disc of 2cm according to actual conditions, 2-6cm adopts cement mortar bedding block, surpasses 6cm and adopts pea gravel concreten cushion block).During Specific construction, can make precast lining globality better according to stressing conditions at cement mortar bedding block or concrete pad internal configurations gauze wire cloth or steel mesh reinforcement, supporting capacity be stronger.
The array that is provided with described column base plate 1, billet 2 and precast lining 3 runs through the via hole of column base plate 1, billet 2 and precast lining 3, by connecting reinforcement through column base plate 1, billet 2, precast lining 3 being connected as a single entity with independent foundation under column 4 after described via hole; Described via hole is generally 4 groups (size of visual column base plate 1 and steel columns bear load increase and decrease), also can be 6 groups, 8 groups etc., with concrete condition, selects; Be distributed in the reasonable force part of column base plate 1, billet 2 and precast lining 3, better effects if.
The upper end of described top screws reinforcing bar 5 is fixing by double nut and nut backing plate and column base plate 1, and the lower end of top screws reinforcing bar 5 is threaded by branch sleeve 7 with the upper end of bottom crab-bolt screw rod reinforcing bar 6; Lower end and independent foundation under column 4 anchor connections of bottom crab-bolt screw rod reinforcing bar 6; The bottom of described bottom crab-bolt screw rod reinforcing bar 6 has kink, can effectively improve anchoring effect.Described billet 2 has the position of growing above precast lining 3 relative both sides.
Described billet 2 also can adopt the steel filler strip of avoiding connecting reinforcement to replace, and in guaranteed strength and stable in the situation that, more saves material.The thickness of this billet 2 or steel filler strip need meet force request, and its thickness is generally not less than 20mm.
In the situation that settlement of foundation is little, only needs to change the top screws reinforcing bar being of convenient length and then by branch sleeve 7, be again threaded with bottom crab-bolt screw rod reinforcing bar 6.When ground produces after sedimentation, first the column base plate 1 of the i iron steel column 8 by 2 pairs of light Steel-Structure Factory with Steel of billet carries out jacking, adopt again precast lining with holes to clog the gap between consequent independent foundation under column 4 and column base plate 1, thereby make column base plate 1 be returned to home position.
Adopt the light Steel-Structure Factory with Steel patten of this adaptation filled ground sedimentation, padded construction method after its sedimentation, comprises the steps:
1), after the sedimentation of banketing, first dismantle top screws reinforcing bar upper end double nut and nut backing plate, and take out top screws reinforcing bar; Carry out excavation of foundation pit simultaneously, the position of growing of independent foundation under column top and top billet thereof is exposed;
2), by the position of growing of the billet of top, the relative both sides of precast lining is applied to active force, column base plate is increased to design elevation at the bottom of the former post before foundation settlement; When the position of growing of the billet of top, the relative both sides of precast lining is applied to active force, jack is placed in to grow position below of billet, by jack, directly billet is carried out to jacking, easy to operate, be applicable to the factory building that less jack or weight are lighter.
3) between billet and independent foundation under column, be packed to again the precast lining with via hole that quantity, thickness and intensity are suitable; Described precast lining quantity and thickness are highly as the criterion before column base plate can being increased to sedimentation, and precast lining intensity is as the criterion can meet stressed needs, and is not less than the concrete strength of independent foundation under column 4, before filling, by required number and thickness, are undertaken prefabricated; During filling, insert between billet 2 and independent foundation under column 4;
4) remove active force, column base plate is padded to design elevation at the bottom of former post by precast lining;
5) the top screws reinforcing bar after adopting length adjustment suitable is connected fastening (can change another root top screws reinforcing bar) after through column base plate, billet, precast lining with bottom crab-bolt screw rod screw thread steel by branch sleeve; Finally in the end of top screws reinforcing bar, insert nut backing plate fastening by double nut and column base plate, complete thus the padded adjustment process after filled ground sedimentation occurs.Adopt double nut and column base plate fastening, can further ensure integrally-built stability, avoid nut to come off.
Embodiment 2, as shown in Figure 2, described precast lining is a plurality of, described connecting reinforcement comprises top screws reinforcing bar, middle part screw rod reinforcing bar 9, bottom crab-bolt screw rod reinforcing bar, described top screws reinforcing bar, middle part screw rod reinforcing bar 9 and bottom crab-bolt screw rod reinforcing bar are threaded by branch sleeve, during concrete enforcement, adopt mechanical sleeve to be connected, more firm.
In the situation that settlement of foundation is larger, increase as required or change the middle part screw rod reinforcing bar being of convenient length, when filling precast lining (filler strip), can connect middle part screw rod reinforcing bar in limit like this, limit filling precast lining (filler strip), convenient.When ground produces after sedimentation, first the column base plate of the i iron steel column of light Steel-Structure Factory with Steel is carried out to jacking, adopt again perforate precast concrete cushion block (or filler strip) to clog the gap between consequent independent foundation under column and column base plate, thereby make column base plate be returned to home position.
Light Steel-Structure Factory with Steel patten to the sedimentation of above-mentioned adaptation filled ground, padded construction method after its sedimentation, comprises the steps:
1), after the sedimentation of banketing, first dismantle double nut and the nut backing plate of top screws reinforcing bar upper end, and take out top screws reinforcing bar; To carrying out excavation of foundation pit, the position of growing of the billet of independent foundation under column top and top thereof is exposed simultaneously;
2), by the position of growing of the billet of top, the relative both sides of precast lining is applied to active force, column base plate is increased to design elevation at the bottom of the former post before foundation settlement; During jacking, make quadrilateral frame, when the position of growing of the billet of top, the relative both sides of precast lining is applied to active force, by two frameworks, be inserted in respectively the position of growing of billet both sides, then adopt two steel poles through two corners of two framework top margins, and jack pair steel pole is set on the ground carries out jacking, thereby framework is carried out to jacking, and then billet and column base plate are carried out to jacking.During Specific construction, described quadrilateral frame can be made into trapezoidal, and adopts steel work, so not only easy construction, and supporting capacity is stronger.This quadrangle steelframe can be according to the load of the light steel mill pillars of a house, and the size of required top lift adopts the conventional steel such as hot-rolled reinforced bar or shaped steel to make.So can jacking process be subject to the impact of light Steel-Structure Factory with Steel, more convenient to operate, and better effects if, make the stressed balance more of billet, be more prone to operation.
3) again the middle part screw rod reinforcing bar of the suitable TBE (threaded both ends) of length adjustment is coupled together by branch sleeve and bottom crab-bolt screw rod reinforcing bar, and at the branch sleeve between fastening good itself and top shank of bolt reinforcing bar above the screw rod reinforcing bar of middle part; The reinforcing bar top connecting from these penetrates the precast lining with via hole that quantity, thickness and intensity are suitable;
4) remove active force, column base plate is padded to design elevation at the bottom of former post by precast lining;
5) top screws reinforcing bar is connected fastening by branch sleeve with middle part screw rod screw thread steel through after column base plate, billet; Finally in the end of top screws reinforcing bar, insert nut backing plate fastening by double nut and column base plate, complete thus the padded adjustment process after filled ground sedimentation occurs.Adopt double nut and column base plate fastening, can further ensure integrally-built stability, avoid nut to come off.
The present invention, except applicable filled ground, also can be extended to the light Steel-Structure Factory with Steel building that may produce foundation settlement of other occasion, as soft foundation, and other unfavorable foundation etc.
In addition, precast lining is made the form of upper level, lower tilt, for basic end face in the sedimentation of banketing, may produce inclination situation slightly, can guarantee to maintain former level at the bottom of upper post, and general this inclined degree is not very large.
Finally it should be noted that, above embodiment is only in order to illustrate technical scheme of the present invention but not restriction technologies scheme, although applicant has been described in detail the present invention with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, those are modified or are equal to replacement technical scheme of the present invention, and do not depart from aim and the scope of the technical program, all should be encompassed in the middle of claim scope of the present invention.
Claims (3)
1. a light Steel-Structure Factory with Steel patten that adapts to filled ground sedimentation, it is characterized in that, comprise connecting reinforcement and the column base plate setting gradually from top to bottom, billet, precast lining and independent foundation under column, described connecting reinforcement comprises top screws reinforcing bar and bottom crab-bolt screw rod reinforcing bar, and described top screws reinforcing bar and bottom crab-bolt screw rod reinforcing bar removably connect by branch sleeve; Described column base plate is for the i iron steel column of fixing light Steel-Structure Factory with Steel;
The array that is provided with described column base plate, billet and precast lining runs through the via hole of column base plate, billet and precast lining, and described precast lining is steel plate, cement mortar bedding block or concrete pad; Described via hole is 4 groups; By connecting reinforcement, through after described via hole, column base plate, billet, precast lining and independent foundation under column are connected as a single entity; Described precast lining is a plurality of, and described connecting reinforcement comprises top screws reinforcing bar, middle part screw rod reinforcing bar, bottom crab-bolt screw rod reinforcing bar, and described top screws reinforcing bar, middle part screw rod reinforcing bar and bottom crab-bolt screw rod reinforcing bar are threaded by branch sleeve; The upper end of described top screws reinforcing bar is fixed by double nut and nut backing plate and column base plate, lower end and the concrete foundation anchor connection of bottom crab-bolt screw rod reinforcing bar; The bottom of described bottom crab-bolt screw rod reinforcing bar has kink;
Described billet has the position of growing above the relative both sides of precast lining.
2. adapt to as claimed in claim 1 padded construction method after the light Steel-Structure Factory with Steel patten sedimentation of filled ground sedimentation, it is characterized in that, comprise the steps:
1), after the sedimentation of banketing, first dismantle double nut and the nut backing plate of top screws reinforcing bar upper end, and take out top screws reinforcing bar;
2), by the position of growing of the billet of top, the relative both sides of precast lining is applied to active force, column base plate is increased to design elevation at the bottom of the former post before foundation settlement;
3) again the middle part screw rod reinforcing bar of the suitable TBE (threaded both ends) of length adjustment is coupled together by branch sleeve and bottom crab-bolt screw rod reinforcing bar, and at the branch sleeve between fastening good itself and top shank of bolt reinforcing bar above the screw rod reinforcing bar of middle part; The reinforcing bar top connecting from these penetrates the precast lining with via hole that quantity, thickness and intensity are suitable;
4) remove active force, column base plate is padded to design elevation at the bottom of former post by precast lining;
5) top screws reinforcing bar is connected fastening by branch sleeve with middle part screw rod screw thread steel through after column base plate, billet; Finally in the end of top screws reinforcing bar, insert nut backing plate fastening by double nut and column base plate, complete thus the padded adjustment process after filled ground sedimentation occurs.
3. construction method according to claim 2, it is characterized in that, make quadrilateral frame, when the position of growing of the billet of top, the relative both sides of precast lining is applied to active force, by two frameworks, be inserted in respectively the position of growing of billet both sides, then adopt two steel poles through two corners of two framework top margins, and jack pair steel pole is set on the ground carries out jacking, thereby framework is carried out to jacking, and then billet and column base plate are carried out to jacking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210399823.7A CN102864795B (en) | 2012-10-19 | 2012-10-19 | Light steel factory post foundation suitable for sedimentation of filled-in ground and construction method |
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|---|---|---|---|
| CN201210399823.7A CN102864795B (en) | 2012-10-19 | 2012-10-19 | Light steel factory post foundation suitable for sedimentation of filled-in ground and construction method |
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| CN102864795B true CN102864795B (en) | 2014-11-26 |
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