CN104895092B - The method that a kind of interim lattice column of inner support is used as permanent structure post - Google Patents

The method that a kind of interim lattice column of inner support is used as permanent structure post Download PDF

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Publication number
CN104895092B
CN104895092B CN201510297618.3A CN201510297618A CN104895092B CN 104895092 B CN104895092 B CN 104895092B CN 201510297618 A CN201510297618 A CN 201510297618A CN 104895092 B CN104895092 B CN 104895092B
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China
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column
concrete
lattice column
lattice
post
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CN201510297618.3A
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Chinese (zh)
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CN104895092A (en
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叶海龙
程群
姚守涛
周璇
王生玉
管聪聪
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中建四局第六建筑工程有限公司
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Abstract

The invention discloses the method that a kind of interim lattice column of inner support is used as permanent structure post.The method includes the design principle combined by lattice column, column pile driving construction, structural column construction, structural column formwork erection, 5 steps of structural column concreting with permanent structure post.The present invention is the position of inner support lattice column to be overlapped with basement structure post location positioning in the design phase, not remove after the completion of the construction of inner support steel structure column, by colligation steel bar stress, casting concrete on the outside of lattice column, basement structure post is eventually served as.The method can not only effectively utilize existing basement space, and can in work progress the reduction of erection time, save buildings and resources, reduce construction cost, with very strong promotional value.

Description

The method that a kind of interim lattice column of inner support is used as permanent structure post

Technical field

The present invention relates to the method that a kind of interim lattice column of inner support is used as permanent structure post.

Background technology

With the development that modern architecture industry is maked rapid progress, the increasingly reduction in urban architecture space promotes urban architecture Progressively to complex structure, increase the underground space and the direction such as utilize to develop.As city proper building is dense, give The construction of building brings many retardances, it is difficult to constructed using traditional pattern.Therefore various support forms Develop and perfect continuous.Fender post (wall) plus inner support this support form are one of which.By In its simple structure, stress clearly, technology maturation, safe and reliable, particularly exist in deep big foundation pit engineering Surrounding enviroment are more complicated or the foundation ditch that geological conditions is poor in apply quite varied.Inner support form typically has Concrete support and bracing members, with the increase for supporting span, typically all can support the larger position of beam stress Lattice column or concrete column are set, and any support column typically can be all removed after the completion of supporting task. It is longer to thus result in the construction period, waste of resource.

Content of the invention

The technical problem to be solved in the present invention is to provide a kind of interim lattice column of inner support as permanent structure post Method.

In order to solve above-mentioned technical problem, the technical solution used in the present invention is:The interim lattice column of inner support is used The method for making permanent structure post, comprises the following steps:

First, the design principle combined with permanent structure post by lattice column

The lattice column of inner support is arranged in the range of internal support of foundation pit the position of basement structure post, is met Force status as the interim lattice column of inner support;Stiffness of the lattice column as permanent structure post after excavation of foundation pit Reinforcing bar, forms permanent structure post;

Stand column pile participates in the stress of engineering pile, and stand column pile is entered as engineering pile by the Force Calculation rule of a clump of piles Row is utilized;

2nd, column pile driving construction

Enter field measurement:

Lattice column and positioning formula lattice column are supported using batch production Product processing outside the venue;Prepare by design requirement Material list hands over consigned processing after supervision & assessment, it is ensured that material and fabricating quality and have every checking measure;According to industry Main offer cross-post record and each stake point carry out checking measurement, through check errorless after fill in pile extension record;Applying Workshop ground is recorded according to plane delivery receiving stake beneficial to ground traverse point is arranged where protection and setting-out, and setting-out goes out The plane coordinates of surface traverse point;

Drilling and forming hole, borehole cleaning:

Verify once per 4~5m of drilling depth, all should verify before more bit change or at easy shrinkage cavity;Hole depth Deviation ensures within ± 10cm;Sediment thickness is defined by measured quantity after second borehole cleaning, need to be not more than 5cm;

The purpose of borehole cleaning is to exchange mud in hole, eliminates boring mud and precipitation, and the direct circulation system using pore-forming is straight Tap into row;Borehole cleaning is carried out in two times, and first time borehole cleaning is carried out after pore-forming is finished immediately;Second borehole cleaning exists Decentralization steel reinforcement cage and conduit are carried out after installing;Borehole cleaning terminates, can be with supervisor to hole depth, and bottom hole is sunk Situations such as slag, is checked, and fills in pore-forming receipt in time, and borehole cleaning half an hour after planted agent irrigates concrete;

Hang steel reinforcement cage:

The lifting of stand column pile fabrication of reinforcing cage is with routine cast-in-situ bored pile pouring construction;

The installation of lattice column and perpendicularity Bit andits control:

Lattice column is hung using an automobile loop wheel machine, and suspension centre is located at lattice column top;Lattice column is fixed and is adopted Bent up with steel reinforcement cage part cage bar top, be welded and fixed with lattice column batten plate and angle steel, lattice column must when fixed Steel reinforcement cage center must be occupy;

In welding process, crane hangs lattice column all the time, it is to avoid its stress;Should be accurate when in shaped steel, stake hangs Positioning, it is ensured that the control of stand column pile perpendicularity of lattice column 1/500~1/1000, centre deviation ± 5mm;

Underwater Concrete is poured:

Quality is poured in order to ensure concrete when stand column pile concrete is poured, it is ensured that the concrete for entering lattice column in stake reaches design Require, a pile underwater concrete pouring technique should be taken;And constructed using pumping concrete;

3rd, structural column construction

The technological process of structural column construction is as follows:

Cubic metre of earth smooth → cushion construction → line setting → draw hole → insertion reinforcing bar → cap constructs → in stem stem On lattice column, weldering well word muscle (each one up and down) connects for positioning stirrup → set column tie-bar → vertical applied force muscle → bandage muscle → carry out next process

Cap is constructed:

Using arch without beam, cap is set with floor part in lattice column, it is possible to resolve base plate Punching Shear problem; Reduce the effective span of base plate;Reduce seat shoulder bar;Different with construction according to stress, cap is divided into half cap Construction, 3/4 cap construction, double capital construction, complete cap construct four classes;

Stirrup is positioned:

Well word muscle is welded on lattice column according to post position;Post is carried out after will be firm with well word muscle colligation for positioning stirrup Cage bar connects;

Structure column tie-bar can be passed through from the space between lattice column angle steel, when lattice column batten plate met by stirrup, can Punch on batten plate through the aperture that punches on batten plate is bar diameter+2mm;

Structural column Vertical bar connection:

Lattice column elevationally outward bar connecting when, be to ensure project progress and quality, bar diameter in post D >=Ф 20, splice are connected using straight thread compression sleeve;In every layer of basement bottom board work progress At cap position, lattice column surrounding electricity consumption drill hole is put into reinforcing bar, and reinforcing bar insertion depth is from cap bottom 1m; According to layout design and code requirement straight screw sleeve by upper and lower two-layer steel bars after the earth excavation Connection;

Lattice column is connected with basement roof:

Peg of the specification for d=19mm, L=100mm, peg are welded in lattice column and basement roof junction Spacing is 100mm, increases the cohesive force with floor by peg;Arrange under beam at basement driving passage Steel bracket, steel bracket are connected by full weld with lattice column;

Lattice column is connected with first support beam:

One layer of C10 concrete cushion, bed course and lattice are built first in beam bottom pour mold when lattice column is connected with support beam Post junction arranges angle steel supporting plate, and lattice column is 12mm with beam handing-over bottom per two pieces of thickness of the elongated full weld in side Batten plate, bores a hole along axis of support direction on lattice column top, and aperture is bar diameter+2mm, welds 3 Φ 20 Reinforcing bar, is connected with support beam;Support beam casting concrete cuts bottom concrete bed course after reaching structural strength;

When cap position is connected with beam reinforced steel bar, beam reinforced steel bar is that lattice column crossover sites are punched to lattice column Beam end section is increased through lattice column or bending reinforcing steel bar and passes through lattice column;Improve structure shearing resistance at node strong Degree;

4th, structural column formwork erection

The construction technology of structural column formwork erection:Column template → installation tie → Allah's bar or diagonal brace → mould are installed Plate is checked and accepted

Using 40mm × 90mm wood a tree, used in making timber for boats as secondary back cord, main back cord adopts Φ 48 × 3.0 to structural column side template Horizontal double steel pipe;Column template is installed must brush aqueous demoulding agent;Carpenter should be carried out before formwork erection turns over sample, By column template according to place domain number labelling;According to the played template sideline of floor during formwork erection, line ball by Lower and upper installation;Adjacent block template splicing position, using 40 × 90 wooden a tree, used in making timber for boats back of the body a tree, used in making timber for boats top jail splicing edges;Post mould After plate is in place, according to formwork, 40 × 90 back of the body a tree, used in making timber for boats are required that wooden a tree, used in making timber for boats spacing should be according to template in template The length of side is uniformly distributed, and is clamped using steel pipe anchor ear, tightens 3 type card of anchor ear screw rod in time, when 3 type cards are reinforced Template section can be tensed 3~5mm;When column template is installed require overall height messenger wire, correct perpendicularity, post with Plate delivery position answers seat to starch;

5th, structural column concreting

Structural column has lattice column to affect due to post core, between structural column two sides insertion vibrating spear and lattice column Space is vibrated difficulty, is to eliminate vibrating spear to vibrate difficulty or the concrete quality problem for producing of cannot vibrating; Stay at the top of cap and set concreting hole, using vibrating in lattice column+template outside auxiliary vibrate to ensure to mix Solidifying soil pouring quality;

After inner support plate of having constructed, first lattice column rust is cleaned with steel brush, and adopt common Po32.5 silicon Acid salt cement prepares plain-water slurry, then smears lattice column from top to bottom successively, so as to avoid the rust of lattice column Erosion;2 sleeve pipes are diagonally set at capital end during structural column concreting, it is ensured that concrete is poured Build quality;

A small amount of clear water is poured in 30 minutes into template before concreting, and template, lattice column, reinforcing bar are filled Moistening, post bottom New-old concrete joint surface is divided first to lay one layer and remove stone mortar with concrete with proportioning, lay THICKNESS CONTROL in 100mm, to eliminate " rotten " phenomenon;

Slump of marching into the arena is controlled between 180~200mm, for enabling concrete mix to enter frame The less position in trestle space, for when slump is less or isolates, it should stop immediately making With;

Concrete is primary to be poured less than 50cm, and each concrete vibrating poured in height is closely knit The pouring of next time concrete can be carried out afterwards;Concreting is extremely poured from stopping away from cap lower surface 500mm Build, interval 1h, so that concrete settlement;Continue to pour remaining position concrete before concrete initial set;

Concrete per pours time proper extension, controls in 30~45s, is shaken after 10~20mi n again; Final step concreting, from after charging aperture blanking, when vibrating, vibrating spear need to be inserted and be poured in advance concrete 50mm in concrete, after pouring to cap bottom surface, top laitance is removed;Again casting concrete again, Again vibrate after Concrete Filled is uniform, until closely knit;As concrete shrinkage still can produce gap, Therefore must and be processed with slip casting method;

Cannot pour in place as found concrete in casting process, and tapping template finds large area cavity, stands Stop concreting, and form removal as early as possible, clear up with casting concrete;And rinsed on reinforcing bar with water Concrete, it is ensured that reinforcing bar cleaning unaffected.

Preferably, for Underwater Concrete pouring, including step in detail below:

(1) it is inserted into irrigating concrete conduit from lattice column, carries out secondary pile hole cleaning;Pile body Underwater Concrete filling is first carried out Note;In work progress, concrete face is responsible for by special messenger and rises testing and control;When the part concrete is close to lattice column bottom Face, when reaching predetermined control absolute altitude, insertion depth of the conduit in concrete is controlled in adjustment, and suitably reduction is poured Filling amount, makes concrete face slowly rise, it is to avoid produces the skew of lattice column bottom centre because water velocity is fast or produces The high displacement of top mark on raw lattice column;

(2) conduit and hopper collision lattice column are avoided and causes the inclination of lattice column;

(3) when concrete pouring reaches design of pile top absolute altitude, and ensure that bleeding reaches design and specification specified altitude Afterwards, stop concrete pouring, extract conduit section by section;

(4) concrete interface is poured in control, prevents too high bolt is encased in concrete face from causing to position lattice column.

The invention has the beneficial effects as follows:

Just the position of inner support lattice column is overlapped with basement structure post location positioning in the design phase, including Not remove after the completion of the construction of support steel structure post, by colligation steel bar stress on the outside of lattice column, pour mixed Solidifying soil, eventually serves as basement structure post.The method can not only effectively using existing basement space, And can in work progress the reduction of erection time, save buildings and resources, reduce construction cost, with very strong Promotional value.

Specific embodiment

The present embodiment is a kind of method for being used as permanent structure post with the interim lattice column of inner support, and concrete steps are such as Under:

The design principle combined with engineering pile with permanent structure post and stand column pile by 1 lattice column

The design principle combined with structural column by 1.1 lattice columns:

The lattice column of inner support is arranged in the range of internal support of foundation pit the position of basement structure post, and Force Calculation is carried out to lattice column, the force status as the interim lattice column of inner support will be met.While plaid matching Structure post carries out Force Calculation as permanent structure post, allows lattice column as the stiffness reinforcing bar of permanent structure post, full Force status of the foot as permanent structure post.

The design principle combined with engineering pile by 1.2 stand column pile:

Stand column pile participates in the pile foundation stress of engineering pile, the Force Calculation rule that stand column pile is pressed a clump of piles as engineering pile Then utilized, to reduce the quantity of engineering pile, reduces cost.

2 construction technology processes

Levelling of the land → measurement and positioning → drilling borehole cleaning → hang steel reinforcement cage → lattice column lifting → lattice column school Just → underwater concreting → lattice column molding → lattice column assembling reinforcement → lattice column supporting module → lattice Structure post casting concrete

3 column pile driving constructions

3.1st, enter field measurement

Lattice column and positioning formula lattice column are supported using batch production Product processing outside the venue.Prepare by design requirement Material list hands over consigned processing after the examination & verification such as management, it is ensured that material and fabricating quality and have every checking measure.According to Owner provide cross-post record and each stake point carry out checking measurement, through check errorless after fill in pile extension remember Record.On construction ground beneficial to ground traverse point is arranged where protection and setting-out, remembered according to plane delivery receiving stake Record, setting-out go out the plane coordinates of surface traverse point.

3.2nd, drilling and forming hole, borehole cleaning:

Verify once per 4~5m of drilling depth, all should verify before more bit change or at easy shrinkage cavity.Hole depth Deviation ensures within ± 10cm.Sediment thickness is defined by measured quantity after second borehole cleaning, need to be not more than 5cm.

The purpose of borehole cleaning is to exchange mud in hole, eliminates boring mud and precipitation, and the direct circulation system using pore-forming is straight Tap into row.Borehole cleaning is carried out in two times, and first time borehole cleaning is carried out after pore-forming is finished immediately.Second borehole cleaning exists Decentralization steel reinforcement cage and conduit are carried out after installing.Borehole cleaning terminates, can be with supervisor to hole depth, and bottom hole is sunk Situations such as slag, is checked, and fills in pore-forming receipt in time, and borehole cleaning half an hour after planted agent irrigates concrete.

3.3rd, steel reinforcement cage is hung

The lifting of stand column pile fabrication of reinforcing cage is with routine cast-in-situ bored pile pouring construction;

3.4th, the installation of lattice column and perpendicularity Bit andits control:

Steel reinforcement cage is installed first, in advance on the ground with high-strength stay bolt or steel plate correction to connecting former merogenesis lattice Structure post, is combined into overall lattice column, then lifts in place lattice column by crane.Requirement guarantees stand column pile lattice Post degree control 1/500~1/1000, centre deviation ± 5mm.

3.5th, Underwater Concrete is poured:

Quality is poured in order to ensure concrete when stand column pile concrete is poured, it is ensured that the concrete for entering lattice column in stake reaches design Require, a pile underwater concrete pouring technique should be taken.And constructed using pumping concrete.

Comprise the following steps that:

(1) it is inserted into irrigating concrete conduit from lattice column, carries out secondary pile hole cleaning.Pile body Underwater Concrete filling is first carried out Note.In work progress, concrete face is responsible for by special messenger and rises testing and control.When the part concrete is close to lattice column bottom Face, when reaching predetermined control absolute altitude, insertion depth of the conduit in concrete is controlled in adjustment, and suitably reduction is poured Filling amount, makes concrete face slowly rise, it is to avoid produces the skew of lattice column bottom centre because water velocity is fast or produces The high displacement of top mark on raw lattice column.

(2) conduit and hopper collision lattice column are avoided and causes the inclination of lattice column.

(3) when concrete pouring reaches design of pile top absolute altitude, and ensure that bleeding reaches design and specification specified altitude Afterwards, stop concrete pouring, extract conduit section by section.

(4) concrete interface is poured in control, prevents too high bolt is encased in concrete face from causing to position lattice column.

(5) stably do not walk about to ensure lattice column, lattice column correction should can be loosened after concrete solidification Correction fixing bolt on frame, positions four connecting bolts of lattice column, removes and removes calibrated mount.

4 structural columns are constructed

4.1st, technological process:

Cubic metre of earth smooth → cushion construction → line setting → draw hole → insertion reinforcing bar → cap constructs → in stem stem On lattice column, weldering well word muscle (each one up and down) connects for positioning stirrup → set column tie-bar → vertical applied force muscle → bandage muscle → carry out next process

4.2nd, cap construction:

The present embodiment adopts arch without beam, arranges cap in lattice column with floor part, it is possible to resolve base plate anti-impact Cut problem;Reduce the effective span of base plate;Reduce seat shoulder bar.Different with construction according to stress, cap point Four classes are constructed for half cap construction, 3/4 cap construction, double capital construction, complete cap.

4.3rd, stirrup positioning:

Well word muscle is welded on lattice column according to post position.Post is carried out after will be firm with well word muscle colligation for positioning stirrup Cage bar connects.

Structure column tie-bar can be passed through from the space between lattice column angle steel, when lattice column batten plate met by stirrup, can On batten plate, punching (aperture is bar diameter+2mm) is passed through.

4.4th, structural column Vertical bar connection

Lattice column elevationally outward bar connecting when, be to ensure project progress and quality, bar diameter in post D >=Ф 20, splice are connected using straight thread compression sleeve.In every layer of basement bottom board work progress At cap position, lattice column surrounding electricity consumption drill hole is put into reinforcing bar, and reinforcing bar insertion depth is from cap bottom 1m. According to layout design and code requirement straight screw sleeve by upper and lower two-layer steel bars after the earth excavation Connection.

4.5th, lattice column and basement roof connection

Lattice column and basement roof junction weld spacing on lattice column be 100mm, specification d=19mm, The peg of L=100mm.Cohesive force with floor is increased by peg.At basement driving passage, beam is set Lower steel bracket, steel bracket are connected by full weld with lattice column.

4.6th, lattice column is connected with first support beam

One layer of C10 concrete cushion, bed course and lattice are built first in beam bottom pour mold when lattice column is connected with support beam Post junction arranges angle steel supporting plate, and lattice column is 12mm with beam handing-over bottom per two pieces of thickness of the elongated full weld in side Batten plate, on lattice column top along axis of support direction perforation (aperture is bar diameter+2mm) 3 Φ 20 of welding Reinforcing bar, is connected with support beam.Support beam casting concrete cuts bottom concrete bed course after reaching structural strength.

When cap position is connected with beam reinforced steel bar, beam reinforced steel bar is that lattice column crossover sites are punched to lattice column Beam end section is increased through lattice column or bending reinforcing steel bar and passes through lattice column.Improve structure shearing resistance at node strong Degree.

5th, structural column formwork erection

Structural column formwork erection construction technique:Column template → installation tie → Allah's bar or diagonal brace → template are installed Check and accept

Using 40mm × 90mm wood a tree, used in making timber for boats as secondary back cord, main back cord adopts Φ 48 × 3.0 to structural column side template Horizontal double steel pipe.Column template is installed must brush aqueous demoulding agent.Carpenter should be carried out before formwork erection turns over sample, By column template according to place domain number labelling.According to the played template sideline of floor during formwork erection, line ball by Lower and upper installation.Adjacent block template splicing position, using 40 × 90 wooden a tree, used in making timber for boats back of the body a tree, used in making timber for boats top jail splicing edges.Post mould After plate is in place, according to formwork, 40 × 90 back of the body a tree, used in making timber for boats are required that wooden a tree, used in making timber for boats spacing should be according to template in template The length of side is uniformly distributed, and is clamped using steel pipe anchor ear, tightens 3 type card of anchor ear screw rod in time, when 3 type cards are reinforced Template section can be tensed 3~5mm.When column template is installed require overall height messenger wire, correct perpendicularity, post with Plate delivery position answers seat to starch.

6th, structural column concreting

This engineering method structural column has lattice column to affect due to post core, and vibrating spear and lattice column are inserted in structural column two sides Between space vibrate difficulty, be to eliminate vibrating spear to vibrate difficulty or the concrete quality for producing that cannot vibrate Problem.Stay at the top of cap and set concreting hole, using vibrating in lattice column+template outside auxiliary vibrate come Ensure concrete pouring quality.

6.1st, after inner support plate of having constructed, first lattice column rust is cleaned with steel brush, and adopt common Po 32.5 Portland cement prepare plain-water slurry, then smear lattice column from top to bottom successively, so as to avoid lattice The corrosion of structure post.2 sleeve pipes are diagonally set at capital end during structural column concreting, it is ensured that Concrete pouring quality.

6.2nd, a small amount of clear water is poured into template, by template, lattice column, steel in 30 minutes before concreting Muscle is sufficiently humidified so as to, and post bottom New-old concrete joint surface is first laid one layer and removes stone mortar with concrete with proportioning, Laying depth is controlled in 100mm, to eliminate " rotten " phenomenon.

6.3rd, slump of marching into the arena is controlled between 180~200mm, for enabling concrete mix to enter Enter the less position in frame column space, for when slump is less or isolates, return goods immediately.

6.4th, concrete is primary pours less than 50cm, and each pours the concrete vibrating in height Pouring for concrete next time can be carried out after closely knit.Concreting extremely stops away from cap lower surface 500mm Only pour, interval 1h, so that concrete settlement.Continue to pour before concrete initial set remaining position to mix Solidifying soil.

6.5th, concrete per pours time proper extension, controls in 30~45s, carries out after 10~20mi n Shake again.Final step concreting, from after charging aperture blanking, when vibrating, vibrating spear need to insert elder generation to concrete 50mm in phase casting concrete, after pouring to cap bottom surface, top laitance is removed.Again pour again mixed Solidifying soil, vibrates after Concrete Filled is uniform, again until closely knit.As concrete shrinkage still can be produced Gap, it is therefore necessary to and processed with slip casting method.

6.6th, cannot pour in place as found concrete in casting process, and tapping template finds that large area is empty Hole, stops concreting, and form removal as early as possible immediately, clears up with casting concrete.And rinsed with water Concrete on reinforcing bar, it is ensured that reinforcing bar cleaning is unaffected.

The construction method of the present embodiment has the characteristics that:

1st, the present embodiment in the design phase with regard to clear and definite theory, lattice column in inner support in basement construction Position Design is positioned at the position of basement structure post, and after the completion for the treatment of the support of basement stress, lattice column is not torn open Remove, assembling reinforcement, the structural column after casting concrete as basement structure on the outside of the lattice column.In construction During not only reduce because remove lattice column produce duration, and reduce difficulty of construction, reduce noise, Dust pollution.

2nd, antiseptic and rustproof process, after inner support plate of having constructed, first cleans lattice column rust with steel brush, and adopts Plain-water slurry is prepared with the Portland cement of common Po 32.5, lattice is then smeared from top to bottom successively Post, so that avoid the corrosion of lattice column.

3rd, lattice column does basement structure post, and the shaped steel in structural column is not limited by steel ratio, lattice column Bearing capacity can be higher than same profile reinforced concrete member bearing capacity, while lattice column ductility is good (i.e. shock resistance is good), thus member section area can be reduced.

4th, when lattice column joins, beam reinforced steel bar is by punching through lattice column or bent steel for beam reinforced steel bar Muscle increases beam end section and passes through lattice column.Improve section shearing strength at node.

5th, the inverse interim lattice column of internal support of foundation pit of making is constructed for structural column, need not soil in work progress Side excavates and completes basement vertical structure of just constructing in advance, can effectively shorten construction period, improves basement Space availability ratio.

6th, cap structure is set in the junction of lattice column and basement bottom board, by cap and structural column Synergism, solves the problems, such as base plate Punching Shear;Reduce the effective span of base plate;Reduce seat shoulder bar.Solve Basement structure span is big to affect the overall stress problem of building.

7th, by vibrating in lattice column+template outside auxiliary vibrate technology, it is ensured that concreting degree of compaction, carry High structural column intensity and bearing capacity.

Invention described above embodiment, does not constitute limiting the scope of the present invention.Any Modification, equivalent and improvement for being made within the spirit and principles in the present invention etc., should be included in the present invention Claims within.

Claims (2)

1. the method that a kind of interim lattice column of inner support is used as permanent structure post, comprises the following steps:
First, the design principle combined with permanent structure post by lattice column
The lattice column of inner support is arranged on basement structure post in the range of internal support of foundation pit Position, meets the force status as the interim lattice column of inner support;After excavation of foundation pit, lattice column is made For the stiffness reinforcing bar of permanent structure post, permanent structure post is formed;
Stand column pile participate in engineering pile stress, using stand column pile as engineering pile based on the stress of a clump of piles Calculate rule to be utilized;
2nd, column pile driving construction
Measurement:
On construction ground beneficial to ground traverse point is arranged where protection and setting-out, according to plane Delivery receiving stake is recorded, and setting-out goes out the plane coordinates of surface traverse point;
Drilling and forming hole, borehole cleaning:
Verify once per 4~5m of drilling depth, before more bit change and easily all should at shrinkage cavity Verify;Hole depth deviation ensures within ± 10cm;Sediment thickness is with measure after second borehole cleaning Amount is defined, and need to be not more than 5cm;
The purpose of borehole cleaning is to exchange mud in hole, eliminates boring mud and precipitation, using pore-forming just Blood circulation is directly carried out;Borehole cleaning is carried out in two times, and first time borehole cleaning is stood after pore-forming is finished Carry out;Second borehole cleaning is carried out after decentralization steel reinforcement cage and conduit are installed;After borehole cleaning Half an hour planted agent irrigates concrete;
Hang steel reinforcement cage:
The lifting of stand column pile fabrication of reinforcing cage is with routine cast-in-situ bored pile pouring construction;
The installation of lattice column and perpendicularity Bit andits control:
Lattice column is hung using an automobile loop wheel machine, and suspension centre is located at lattice column top;Lattice The fixation of structure post is bent up using steel reinforcement cage part cage bar top, is welded with lattice column batten plate and angle steel Fixed, when fixed, lattice column must occupy steel reinforcement cage center;
In above-mentioned welding process, crane hangs lattice column all the time, it is to avoid its stress;Shaped steel Middle stake should be accurately positioned when hanging, it is ensured that the control of stand column pile perpendicularity of lattice column 1/500~ 1/1000, centre deviation ± 5mm;
Underwater Concrete is poured:
Quality is poured in order to ensure concrete when stand column pile concrete is poured, it is ensured that enter lattice column in stake Concrete reaches design requirement, should take a pile underwater concrete pouring technique;And adopt pumping concrete Construction;
3rd, structural column construction
The technological process of structural column construction is as follows:
Cubic metre of earth smooth → cushion construction → line setting → draw hole → insertion reinforcing bar → cap is applied The weldering well word muscle of work → on stem stem lattice column is used for positioning stirrup → set column tie-bar → vertically receive Power muscle connection → bandage muscle → carry out next process
Cap is constructed:
Using arch without beam, cap is set with floor part in lattice column, it is possible to resolve base plate resists Punching problem;Reduce the effective span of base plate;Reduce seat shoulder bar;According to stress and construction Difference, cap are divided into half cap construction, 3/4 cap construction, double capital construction, complete column Cap constructs four classes;
Stirrup is positioned:
Well word muscle is welded on lattice column according to post position;Will positioning stirrup and well word muscle colligation jail Gu after carry out post cage bar connection;
Structure column tie-bar can be passed through from the space between lattice column angle steel, when lattice column met by stirrup During batten plate, can punch on batten plate through the aperture that punches on batten plate is bar diameter+2mm;
Structural column Vertical bar connection:
Lattice column elevationally outward bar connecting when, be to ensure project progress and quality, steel in post Muscle diameter D >=Ф 20, splice are connected using straight thread compression sleeve;Every layer of underground During the construction of bottom plates of room, at cap position, lattice column surrounding electricity consumption drill hole is put into reinforcing bar, steel Muscle insertion depth is from cap bottom 1m;According to layout design and specification after earth excavation Requirement straight screw sleeve is by upper and lower two-layer pressed splice;
Lattice column is connected with basement roof:
Specification is welded for d=19mm, L=100mm in lattice column and basement roof junction Peg, peg spacing are 100mm, increase the cohesive force with floor by peg;In underground Steel bracket under beam is set at room driving passage, steel bracket is connected by full weld with lattice column;
Lattice column is connected with first support beam:
One layer of C10 concrete cushion is built first in beam bottom pour mold when lattice column is connected with support beam, Bed course arranges angle steel supporting plate with lattice column junction, and lattice column is elongated per side with beam handing-over bottom Two pieces of thickness of full weld are 12mm batten plates, bore a hole along axis of support direction on lattice column top, Aperture is bar diameter+2mm, welds 3 Φ, 20 reinforcing bars, is connected with support beam;Support beam is poured Build after concrete reaches structural strength and cut bottom concrete bed course;
When cap position is connected with beam reinforced steel bar, beam reinforced steel bar is that lattice column is handed over to lattice column The punching of fork position increases beam end section through lattice column or bending reinforcing steel bar and passes through lattice column; Improve structural shear strength at node;
4th, structural column formwork erection
The construction technology of structural column formwork erection:Column template → installation tie → Allah's bar is installed Or diagonal brace → template is checked and accepted
Using 40mm × 90mm wood a tree, used in making timber for boats as secondary back cord, main back cord is adopted structural column side template 48 × 3.0 horizontal double steel pipes of Φ;Column template is installed must brush aqueous demoulding agent;Template If before should carry out carpenter and turn over sample, by column template according to place domain number labelling;Formwork erection When from bottom to top installed according to the played template sideline of floor, line ball;Adjacent block template splicing portion Position, using 40 × 90 wooden a tree, used in making timber for boats back of the body a tree, used in making timber for boats top jail splicing edges;After column template is in place, by 40 × 90 According to formwork, back of the body a tree, used in making timber for boats requires that wooden a tree, used in making timber for boats spacing should uniformly be divided according to the template length of side in template Cloth, is clamped using steel pipe anchor ear, tightens 3 type card of anchor ear screw rod in time, when 3 type cards are reinforced Template section can be tensed 3~5mm;Overall height messenger wire is required when column template is installed, and correction is vertical Degree, post answer seat to starch with plate delivery position;
5th, structural column concreting
Structural column has lattice column to affect due to post core, and vibrating spear dative is inserted in structural column two sides Space between structure post is vibrated difficulty, is to eliminate vibrate difficulty or cannot vibrate of vibrating spear to produce Raw concrete quality problem;Stay at the top of cap and set concreting hole, using lattice column Inside vibrate+template outside auxiliary vibrate to ensure concrete pouring quality;
After inner support plate of having constructed, first lattice column rust is cleaned with steel brush, and using common Po32.5 portland cements prepare plain-water slurry, then smear lattice column successively from top to bottom, So as to avoid the corrosion of lattice column;Diagonally square at capital end during structural column concreting To 2 sleeve pipes of setting, it is ensured that concrete pouring quality;
Pour a small amount of clear water before concreting in 30 minutes into template, by template, lattice Post, reinforcing bar are sufficiently humidified so as to, and post bottom New-old concrete joint surface first lays one layer and concrete is same Proportioning removes stone mortar, and laying depth is controlled in 100mm, to eliminate " rotten " phenomenon;
Slump of marching into the arena is controlled between 180~200mm, for making concrete mixing Material can enter the less position in frame column space, for slump is less or isolation Situation, it should stop using immediately;
Concrete is primary to be poured less than 50cm, and each pours the concrete in height Pouring for concrete next time can be carried out after vibration compacting;Concreting is under cap Stopping at the 500mm of surface is poured, interval 1h, so that concrete settlement;At the beginning of concrete Continue to pour remaining position concrete before solidifying;
Concrete per pours time proper extension, controls in 30~45s, 10~20mi n After shaken again;Final step concreting, concrete are vibrated from after charging aperture blanking When vibrating spear need to insert 50mm in casting concrete in advance, after pouring to cap bottom surface, will be upper Portion's laitance is removed;Again casting concrete, vibrates after Concrete Filled is uniform again again, Until closely knit;As concrete shrinkage still can produce gap, it is therefore necessary to and use slip casting method Process;
Cannot pour in place as found concrete in casting process, and tapping template finds big face Product cavity, stops concreting, and form removal as early as possible immediately, clears up to pour coagulation Soil;And the concrete rinsed on reinforcing bar with water, it is ensured that reinforcing bar cleaning is unaffected.
2. the interim lattice column of inner support is used as permanent structure post according to claim 1 Method, it is characterised in that for Underwater Concrete is poured, including step in detail below:
(1) it is inserted into irrigating concrete conduit from lattice column, carries out secondary pile hole cleaning;Stake is first carried out Body underwater concrete pouring;In work progress, concrete face is responsible for by special messenger and rises testing and control;When The part concrete is close to lattice column bottom surface, and when reaching predetermined control absolute altitude, conduit is controlled in adjustment Insertion depth in concrete, and suitably reduce irrigation amount, concrete face is slowly increased, it is to avoid because Water velocity is fast and top mark height is moved on the skew of generation lattice column bottom centre or generation lattice column Position;
(2) conduit and hopper collision lattice column are avoided and causes the inclination of lattice column;
(3) when concrete pouring reaches design of pile top absolute altitude, and ensure that bleeding reaches design and advises After model specified altitude, stop concrete pouring, extract conduit section by section;
(4) concrete interface is poured in control, prevents too high bolt is encased in concrete face from causing to determine Position lattice column.
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