CN104452972A - Concrete structure seamless construction method using sliding supporting base - Google Patents
Concrete structure seamless construction method using sliding supporting base Download PDFInfo
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- CN104452972A CN104452972A CN201410609874.7A CN201410609874A CN104452972A CN 104452972 A CN104452972 A CN 104452972A CN 201410609874 A CN201410609874 A CN 201410609874A CN 104452972 A CN104452972 A CN 104452972A
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Abstract
The invention discloses a concrete structure seamless construction method using a sliding supporting base. According to the method, the sliding supporting base is arranged between a first concrete structure and a second concrete structure which are mutually connected, the sliding supporting base comprises a first connection piece and a second connection piece which can slide relative to each other, the first concrete structure is connected with the first connection piece, the second concrete structure is connected with the second connection piece, and the first connection piece and the second connection piece are driven to slide relative to each other when the first concrete structure or the second concrete structure deforms. According to the construction method, the sliding supporting base is arranged between the two connected concrete structures, so that redundant restraint on the concrete structures is reduced, structural stress, caused by deformation constraints and loads, of the concrete structures is reduced, cracks of the concrete structures are effectively reduced or even avoided, and especially, generation of cracks of overlong concrete structures can be effectively controlled.
Description
Technical field
The present invention relates to the realm of building construction, especially relate to a kind of concrete structure seamless construction method adopting sliding support.
Background technology
Along with developing rapidly of various large public building or industrial construction construction, due to function and needs attractive in appearance, super-long structural obtains applying more and more widely.If the shrinkage strain of Overlong Concrete Structure and temperature deformation are dealt with improperly, Overlong Concrete Structure easily produces crack, even can have influence on the normal use of concrete structure time serious.
Concrete crack causes primarily of external load effect and concrete deformation, the control method in Overlong Concrete Structure crack disclosed in correlation technique, mainly concentrate on the crack controlling to be caused by shrinkage strain and temperature deformation, common way adopts expansive concrete and ater-casting etc.But when the concrete deformation caused by temperature or contraction is excessive, the control effects of this construction method fracture is limited.
Summary of the invention
The present invention is intended at least solve the technical problem existed in prior art.For this reason, the object of the present invention is to provide a kind of concrete structure seamless construction method adopting sliding support, the concrete structure seamless construction method of this employing sliding support effectively can control the generation of concrete structure crack when concrete deformation is excessive.
According to the concrete structure seamless construction method of the employing sliding support of the embodiment of the present invention, between first, second concrete structure interconnective, sliding support is set, described sliding support comprises can the first connector of relative sliding and the second connector, described first concrete structure is connected with described first connector, described second concrete structure is connected with described second connector, wherein drives described first connector and described second connector relative sliding when described first concrete structure or described second concrete structure distortion.
According to the concrete structure seamless construction method of the employing sliding support of the embodiment of the present invention, by arranging sliding support between interconnective two concrete structures, to reduce the superfluous constraint on concrete structure, thus the structural stress that minimizing concrete structure is caused by deformation constrain and load, and then effectively the generation of concrete structure crack is even avoided in minimizing, especially effectively can control the generation in Overlong Concrete Structure crack.
In addition, also following additional technical feature can be had according to the concrete structure seamless construction method of employing sliding support of the present invention:
In some embodiments of the invention, described first concrete structure is long strip type structure, and the glide direction between described first connector and described second connector is parallel with the length direction of described first concrete structure.Thus realize elongated or Overlong Concrete Structure jointless construction, reduce the generation even avoiding its crack.
In other embodiments of the present invention, described first concrete structure is loop configuration, the glide direction between described first connector and described second connector and described first concrete structure radial parallel.Thus eliminate loop configuration in the superfluous constraint with body of wall (rod structure) junction, reduce loop configuration Yin Wendu or shrink the stress deformation produced, avoiding loop configuration to produce crack because of superfluous constraint.
In other embodiments of the present invention, described first concrete structure is plated construction, the plane parallel at the glide direction between described first connector and described second connector and described first concrete structure place.Thus realize the concrete structure jointless construction of plane or super plane, reduce the generation even avoiding its crack.
In specific embodiments more of the present invention, the step that described concrete structure arranges described sliding support comprises: S1: the formwork for placing installing described first concrete structure, assembling reinforcement; S2: build and the first concrete structure described in maintenance; S3: described sliding support is fixed on described first concrete structure, wherein, described first connector is connected on described first concrete structure; S4: the formwork for placing installing described second concrete structure on the second connector, assembling reinforcement; S5: build and the second concrete structure described in maintenance; S6: the junction of described second connector and described second concrete structure is carried out checking, reinforcing.
In other specific embodiments of the present invention, the step that concrete structure arranges sliding support comprises: S1 ': the template installing described first concrete structure and described second concrete structure respectively; S2 ': the reinforcing bar of the first concrete structure and described second concrete structure described in colligation respectively; S3 ': respectively the concrete of described first concrete structure and described second concrete structure is built; S4 ': respectively maintenance is carried out to described first concrete structure and described second concrete structure; S5 ': after described first concrete structure and described second concrete structure maintenance complete, first connector is fixed on described first concrete structure, again the second connector is fixed on described second concrete structure, afterwards the first concrete structure being provided with the first connector is carried on described second concrete structure, then connects described first connector and described second connector.
Particularly, described sliding support is bolted on the steel work of described first concrete structure and described second concrete structure.Thus the reliability that raising sliding support is connected with concrete structure.
In concrete examples more of the present invention, described first connector is the seat of honour, and the described seat of honour is fixed on described first concrete structure, and described second connector is lower seat, described lower seat is fixed on described second concrete structure, is connected between the described seat of honour with described lower seat with sliding component.Thus, sliding support structure is simple, and structural strength is high, and weight capacity is large.
In concrete examples more of the present invention, described second connector is line slideway, and described first connector is slide block, and described slide block is engaged to described line slideway, is connected between described slide block with described line slideway by steel ball.
Alternatively, described first connector comprises the seat of honour and the centre of sphere, and the described seat of honour is fixed on described first concrete structure, the described centre of sphere be located at the described seat of honour towards on the end face of described second connector; Described second connector on the end face of described first connector, be formed with the groove be slidably matched with the described centre of sphere.
Further, described sliding support also comprises: two guide blocks, and described two guide blocks extend from the opposing sidewalls being positioned at described groove both sides of described second connector towards direction away from each other respectively; Two extension boards, described two extension boards to be located on the described seat of honour and to limit sliding space between each described extension board and the described seat of honour, and described two guide blocks are located in described sliding space respectively slidably.Thus, the interaction of two guide blocks and two extension boards, makes the first connector and the second connector not easily depart from, thus the reliability and safety that raising the first concrete structure is connected with the second concrete structure.
Additional aspect of the present invention and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1-Fig. 3 arranges schematic diagram according to the sliding support of different embodiments of the invention on concrete structure;
Fig. 4 is according to the seamless build process flow chart of the concrete structure of the embodiment of the present invention;
Fig. 5-Fig. 8 is the structural representation of the sliding support according to different embodiments of the invention;
Fig. 9 and Figure 10 is the method schematic diagram arranging sliding support on concrete structure according to different embodiments of the invention;
Figure 11 is the sliding support setting position schematic diagram in the stadium according to the embodiment of the present invention, and in figure, position shown in stain is sliding support set-point.
Reference numeral:
Concrete structure 1, first concrete structure 11, second concrete structure 12,
Sliding support 2,
First connector 21, line slideway a, slide block b, ball wheel c, ball-collecting rack d, steel ball e, toggle f,
The seat of honour 211, the centre of sphere 212, corrosion resistant plate 213, plane slide plate 214, guide block 215,
Second connector 22, groove 221, sphere slide plate 222, extension board 223, sliding space 224.
Detailed description of the invention
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the present invention, and can not limitation of the present invention be interpreted as.
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " vertically ", " level ", " top ", " end ", " interior ", " outward ", " axis ", " radial direction ", orientation or the position relationship of the instruction such as " circumference " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore limitation of the present invention can not be interpreted as.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise one or more these features.In describing the invention, except as otherwise noted, the implication of " multiple " is two or more.
In describing the invention, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements.For the ordinary skill in the art, concrete condition above-mentioned term concrete meaning in the present invention can be understood.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or D score can comprise the first and second features and directly contact, also can comprise the first and second features and not be directly contact but by the other characterisation contact between them.And, fisrt feature second feature " on ", " top " and " above " comprise fisrt feature directly over second feature and oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " comprise fisrt feature immediately below second feature and tiltedly below, or only represent that fisrt feature level height is less than second feature.
Below with reference to Fig. 1-Figure 11, the concrete structure seamless construction method according to the employing sliding support of the embodiment of the present invention is described.
According to the concrete structure seamless construction method of the employing sliding support of the embodiment of the present invention, as shown in Figure 1-Figure 3, between interconnective first concrete structure 11 and the second concrete structure 12, sliding support 2 is set, sliding support 2 comprises can the first connector 21 and the second connector 22 of relative sliding, first concrete structure 11 is connected with the first connector 21, second concrete structure 12 is connected with the second connector 22, wherein drives the first connector 21 and the second connector 22 relative sliding when the first concrete structure 11 or the second concrete structure 12 are out of shape.
Specifically, in modern concrete slotless design, part-structure is built up by concrete structure 1, in the process of construction that concrete structure is seamless, can arrange sliding support 2 between interconnective two concrete structures 1.Here, the principle of the component Free Transform utilizing sliding support 2 can make to be attached thereto, make interconnective two concrete structures 1 can at tie point place relative sliding, thus reduce the superfluous constraint active force of two concrete structures 1 at this tie point place, avoid concrete structure 1 to damage in the structural stress at above-mentioned tie point place excessive causing, thus avoid concrete structure 1 cracking at above-mentioned tie point place.
Wherein, the setting position of sliding support 2 is determined by the analysis result of superfluous constraint in concrete structure 1.Here, when analyzing the first concrete structure 11 superfluous constraint, the analytical method of force analysis comprises theoretical analysis method or Numerical Analysis methods.After obtaining force analysis result, find the superfluous constraint of the first concrete structure 11.Sliding support 2 can be set in superfluous constraint place afterwards, and unidirectional or two-way sliding support 2 can be selected, with under the prerequisite ensureing structural stability, reach the object of this superfluous constraint of release.
Below for the simple examples shown in Fig. 1-Fig. 3, further illustrate the effect of sliding support 2 in the concrete structure seamless construction method according to the embodiment of the present invention.
In the example depicted in fig. 1, first concrete structure 11 is overlength girder construction, second concrete structure 12 is body of wall (rod structure), and girder construction builds the top at body of wall (rod structure), and sliding support 2 is located between girder construction and body of wall (rod structure).When girder construction is influenced by ambient temperature or self shrink cause its length become large or diminish time, girder construction can slided along girder construction length direction by relative body of wall (rod structure) with the junction of body of wall (rod structure).Thus eliminate girder construction in the superfluous constraint with body of wall (rod structure) junction, reduce girder construction Yin Wendu or shrink the stress reduction produced, avoid girder construction in the generation in the crack, junction with body of wall (rod structure).Wherein, body of wall (rod structure) provides vertical supporting role power by sliding support 2 to girder construction, thus ensure that safety and the stability of structure, the setting of sliding support 2 decrease girder construction in the junction with body of wall (rod structure) along the superfluous constraint of girder construction length direction.
In the illustrated example shown in fig. 2, first concrete structure 11 is loop configuration, second concrete structure 12 is body of wall (rod structure), loop configuration builds the top at body of wall (rod structure), sliding support 2 is located between loop configuration and body of wall (rod structure), the glide direction between the first connector 21 and the second connector 22 and the first concrete structure 11 radial parallel.When loop configuration is influenced by ambient temperature or self shrink cause its length become large or diminish time, loop configuration with the junction of body of wall (rod structure) can relative body of wall (rod structure) annularly structure radial direction slide, thus eliminate loop configuration in the superfluous constraint with body of wall (rod structure) junction, reduce loop configuration Yin Wendu or shrink the stress deformation produced, avoiding loop configuration to produce crack because of superfluous constraint.Wherein, body of wall (rod structure) provides vertical supporting role power by sliding support 2 to loop configuration, thus ensure that safety and the stability of structure, the setting of sliding support 2 decreases the superfluous constraint of the annularly structure radial direction of the junction of loop configuration and body of wall (rod structure).
In the example depicted in fig. 3, the first concrete structure 11 is super plane concrete slab, and the second concrete structure 12 is cylinder, and the top at cylinder built by concrete slab, and sliding support 2 is located between cylinder and concrete slab.When concrete slab is influenced by ambient temperature or self shrink cause its area become large or diminish time, concrete slab can slide by counter-cylinder in the horizontal direction in the junction with cylinder.Thus concrete slab is reduced at the structural stress with wall connecting place, avoid concrete slab in the generation in the crack, junction with body of wall.Wherein, cylinder provides vertical supporting role power by sliding support 2 to concrete slab, and the setting of sliding support 2 decreases the horizontal direction of concrete slab in the junction with cylinder and retrains.
In summary, sliding support 2 is set in two concrete structures 1, the superfluous constraint of one of them concrete structure 1 can be discharged, thus change this concrete structure 1 into statically determinate structrue by statically-indeterminate structure, and then reduce the structural stress that this concrete structure 1 causes by deformation constrain and load.Thus, the generation even avoiding concrete structure 1 crack can effectively be reduced.
Below with reference to Fig. 1-Fig. 4, the build process flow process that exposed installation has the concrete structure of sliding support seamless.
(1) external restraint analysis
Specifically, before concrete structure construction, to estimating that multianalysis is carried out in the stressed and external restraint of the concrete structure 1 used, under the prerequisite ensureing Stability Analysis of Structures and safety, analyze the superfluous constraint in concrete structure 1, analyze and could arrange sliding support 2 retraining comparatively strength, whether the safety and stability simultaneously analyzing structure after removing this constraint can be affected.
(2) execution conditions analysis
Specifically, geological conditions, weather conditions such as wind direction, rainy season, temperature and humidity etc. are analyzed, also to analyze that construction site condition is as logical in levelling of the land degree, water simultaneously, the understanding and considerate condition in electricity Tong He road etc., also to analyze duration and quality requirement etc. in addition, formulate rational concrete structure jointless construction scheme and progress according to above-mentioned analysis result.
(3) preparation of construction
Specifically comprise technique preparation, on-the-spot preparation, interim water and electricity consumption preparation and the preparation of construction teams and groups etc.
(4) structure of sliding support 2 is determined
For discharging the superfluous constraint of concrete structure 1, appropriate sliding support 2 can be selected to construct, sliding support 2 is rationally set to reduce superfluous constraint.
It should be noted that, in actual use, concrete structure 1 is by the impact of environment temperature or due to other reasons, such as concrete structure 1 inside its thermal stresses of passing in time can discharge gradually, concrete structure 1 self can deform, and deflection is directly related with the size of concrete structure 1.
In examples more of the present invention, as shown in Figure 1, first concrete structure 11 is long strip type structure, when arranging sliding support 2 between the first concrete structure 11 and the second concrete structure 12, the glide direction between the first connector 21 and the second connector 22 is parallel with the length direction of the first concrete structure 11.
That is, first concrete structure 11 is elongated even Overlong Concrete Structure 1, first concrete structure 11 distortion is in their length direction relatively large, therefore the first concrete structure 11 superfluous constraint in their length direction should be removed, glide direction between first connector 21 and the second connector 22 should be arranged to parallel with the length direction of the first concrete structure 11, thus realize elongated or Overlong Concrete Structure 1 jointless construction, reduce the generation even avoiding its crack.
In examples more of the present invention, as shown in Figure 2, first concrete structure 11 is overlong annular concrete structure, when between the first concrete structure 11 and the second concrete structure 12, sliding support 2 is set, the glide direction between the first connector 21 and the second connector 22 and the first concrete structure 11 radial parallel.
That is, first concrete structure 11 is overlength annular concrete structure, first distortion of concrete structure 11 in its circumferential direction is larger, but in distortion, reflect contraction in the radial direction thereof and stretching, therefore the first concrete structure 11 superfluous constraint in the radial direction thereof should be removed, it is radial parallel that glide direction between first connector 21 and the second connector 22 should be arranged to the first concrete structure 11, thus realize overlength annular concrete structure 1 jointless construction, reduce the generation even avoiding crack.
In other examples of the present invention, as shown in Figure 3, first concrete structure 11 is plated construction, when between the first concrete structure 11 and the second concrete structure 12, sliding support 2 is set, the glide direction between the first connector 21 and the second connector 22 and the plane parallel at the first concrete structure 11 place.
That is, first concrete structure 11 is the plane even concrete structure 1 of super plane type, first concrete structure 11 deflection is in the planar directions larger, therefore the first concrete structure 11 superfluous constraint in the planar directions should be removed, glide direction between first connector 21 and the second connector 22 should be arranged to the plane parallel with the first concrete structure 11 place, thus realize plane or super plane concrete structure 1 jointless construction, reduce the generation even avoiding its crack.
(5) associated construction technique is formulated
Formulate the associated construction techniques such as sliding support 2 is arranged, reinforcing bar binding, formwork erection, concreting and maintenance.
Here, in the concrete structure seamless construction method adopting sliding support, be not specifically limited the method for concreting, concreting can adopt conventional construction method to carry out, and methods such as jumping storehouse construction also can be adopted to carry out.In addition, classifying rationally concrete expansion band and pouring order of concrete and time etc. is needed.
(6) construct by given requirements
In strict accordance with the construction organization design made, constructure scheme, confide a technological secret, construction technology etc. constructs.In adopting the concrete structure of sliding support seamless, in conjunction with the optimum choice of construction material, structure optimization, rationally build, the measure such as management and maintenance, strictly can control the generation in the crack of concrete structure.
According to the concrete structure seamless construction method of the employing sliding support of the embodiment of the present invention, by arranging sliding support 2 between interconnective two concrete structures 1, to reduce the superfluous constraint on concrete structure 1, thus the structural stress that minimizing concrete structure 1 is caused by deformation constrain and load, and then effectively the generation in concrete structure 1 crack is even avoided in minimizing, especially effectively can control the generation in Overlong Concrete Structure 1 crack.
In the sliding support 2 of the embodiment of the present invention, arranging of first connector 21 and the second connector 22 is various informative, and the connected mode etc. as the connected mode of the shape of the first connector 21 and the second connector 22, type of attachment, glide direction and the first connector 21 and the first concrete structure 11, the second connector 22 and the second concrete structure 12 all has various ways.By adopting different structure connected modes between first connector 21 from the second connector 22, the first connector 21 can be made can to produce relative moving freely as required with the second connector 22, thus two concrete structures 1 be connected on sliding support 2 are produced relatively move freely, and then reduce the superfluous constraint of concrete structure 1.That is, first connector 21 can move freely relatively as required with the second connector 22, such as only can along a direction relative movement between the first connector 21 and the second connector 22, can along both direction relative movement between the first connector 21 and the second connector 22.
In concrete examples more of the present invention, as shown in Figure 5, first connector 21 is slide block b, second connector 22 is line slideway a, be connected by steel ball e between slide block b with line slideway a, that is, sliding support 2 forms guide rail-slide block mechanism, thus the first connector 21 can be slided along the second connector 22.
Wherein, guide rail-slider type sliding support can be applicable in long strip type concrete, also can be applicable in the concrete structure of annular.When the first concrete structure 11 is long strip type structure, the glide direction of slide block b is parallel with the length direction of the first concrete structure 11.When the first concrete structure 11 is annular, the glide direction of slide block b is identical with the radial direction of the first concrete structure 11.
In other concrete examples of the present invention, as shown in Figure 6, sliding support 2 is ball wheel-type sliding support, wherein, first connector 21 is the ball castor, and the ball castor comprises ball-collecting rack d and ball wheel c, the ball-collecting rack d be located at rotationally on ball-collecting rack d is fixed on the first concrete structure 11, second connector 22 can be ball wheel track, and ball-collecting rack d can move along face, ball wheel track place.Alternatively, ball wheel track can to form as one part with the second concrete structure 12.
In other concrete example of the present invention, as shown in Figure 7, sliding support 2 also comprises multiple toggle f, multiple toggle f respectively with the first connector 21 and the second connector 22 hinged, that is, first connector 21, second connector 22 and multiple toggle f form multi-connecting-rod mechanism, thus make the first connector 21 and the second connector 22 can relative movement, and moving range between the first connector 21 and the second connector 22 is limited.
Above-mentioned ball wheel-type sliding support, link type sliding support can be applicable in template concrete structure.Certainly, dissimilar concrete structure 1 can select the sliding support 2 be applicable to according to actual needs, does not do concrete restriction here.
In examples more of the present invention, the first connector 21 is the seat of honour, and the seat of honour is fixed on the first concrete structure 11, and the second connector 22 is lower seat, and lower seat is fixed on the second concrete structure 22, is connected between the seat of honour with lower seat with sliding component.Here, the type of sliding component does not do concrete restriction, and sliding component can adopt arbitrary function realizing sliding function disclosed in prior art, and such as sliding component is ball.
In a concrete example of the present invention, as shown in Figure 8, first connector 21 comprises the seat of honour 211 and the centre of sphere 212, the seat of honour 211 is fixed on the first concrete structure 11, the centre of sphere 212 be located at the seat of honour 211 towards on the end face of the second connector 22, the second connector 22 on the end face of the first connector 21, be formed with the groove 221 be slidably matched with the centre of sphere 212.Thus, sliding support 2 structure is simple, and structural strength is high, and weight capacity is large.
Here, second connector 22 can to form as one part with the second concrete structure 12, that is, the end face towards the first concrete structure 11 of the second concrete structure 12 can be recessed into form groove 221, and the centre of sphere 212 directly slides on the second concrete structure 12.
Particularly, sliding support 2 comprises sphere slide plate 222, and sphere slide plate 222 is located on the inner surface of groove 221, thus makes the force of sliding friction of the centre of sphere 212 less, and then improves the practicality of sliding support 2.
Alternatively, sliding support 2 comprises corrosion resistant plate 213 and plane slide plate 214, and corrosion resistant plate 213 is connected between the seat of honour 211 and the centre of sphere 212, and plane slide plate 214 is connected between corrosion resistant plate 213 and the centre of sphere 212.
Further alternatively, the seat of honour 211 and the second connector 22 are steel part.
Further, as shown in Figure 8, sliding support 2 also comprises two guide blocks 215 and two extension boards 223, two guide blocks 215 extend from the opposing sidewalls being positioned at groove 221 both sides of the second connector 22 towards direction away from each other respectively, two extension boards 223 to be located on the seat of honour 211 and to limit sliding space 224 between each extension board 223 and the seat of honour 211, and two guide blocks 215 are located in sliding space 224 respectively slidably.Thus, the interaction of two guide blocks 215 and two extension boards 223, makes the first connector 21 and the second connector 22 not easily depart from, thus the reliability and safety that raising the first concrete structure 11 is connected with the second concrete structure 12.
In specific embodiments more of the present invention, as shown in Figure 9, the step that concrete structure 1 arranges sliding support 2 comprises:
S1: the formwork for placing installing the first concrete structure 11, assembling reinforcement;
S2: build and maintenance first concrete structure 11;
S3: sliding support 2 is fixed on the first concrete structure 11, wherein, the first connector 21 is connected on the first concrete structure 11;
S4: the formwork for placing installing the second concrete structure 12 on the second connector 22, assembling reinforcement;
S5: build and maintenance second concrete structure 12;
S6: the junction of the second connector 22 and the second concrete structure 12 is carried out checking, reinforcing.
That is, before the second concrete structure 12 is built, sliding support 2 is fixed on the steel work of the first concrete structure 11.Formwork for placing due to the second concrete structure 12 props up and is located on the second connector 22, and after the second concrete structure 12 has been built, the second connector 12 of sliding support 2 is bonded to be connected on the second concrete structure 12.
In other specific embodiments of the present invention, as shown in Figure 10, the step that concrete structure 1 arranges sliding support 2 comprises:
S1 ': the template installing the first concrete structure 11 and the second concrete structure 12 respectively;
S2 ': the reinforcing bar of colligation first concrete structure 11 and the second concrete structure 12 respectively;
S3 ': respectively the concrete of the first concrete structure 11 and the second concrete structure 12 is built;
S4 ': respectively maintenance is carried out to the first concrete structure 11 and the second concrete structure 12;
After S5 ': the first concrete structure 11 and the second concrete structure 12 maintenance complete, first connector 21 is fixed on the first concrete structure 11, again the second connector 22 is fixed on the second concrete structure 12, afterwards the first concrete structure 11 being provided with the first connector 21 is carried on the second concrete structure 12, then connects the first connector 21 and the second connector 22.
That is, after concrete structure 1 is built and maintenance completes, then sliding support 2 is fixed on concrete structure 1.This setup, make concreting convenient, concrete blinding is arranged easily.
Particularly, sliding support 2 is bolted on the steel work in concrete structure 1, particularly, sliding support 2 is bolted on the steel work of the first concrete structure 11 and the second concrete structure 12, thus the reliability that raising sliding support 2 is connected with concrete structure 1.
More specifically, concrete blinding adopts total sub-semigroup or design of coupler scaffold to support.
Alternatively, concrete blinding adopts bamboo splint, nine clamping plate etc.
Alternatively, when the size of the concrete structure 1 of building in advance is less, when making the casting space of concrete blinding narrower and small, or when the complex structure of concrete structure 1 makes casting space also complicated, concrete blinding can adopt steel plate.
In a concrete example of the present invention, as illustrated in figures 1 and 8, the first concrete structure 11 is loop configuration, and the second concrete structure 12 is rod structure, in sliding support 2, the first connector 21 comprises the seat of honour 211 and the centre of sphere 212, second connector 22 is provided with groove 221.
In this example, the set-up mode of sliding support 2 is: after rod structure is built and maintenance completes, and is fixedly connected on the top of rod structure by the second connector 22; Before loop configuration is built, the first connector 21 installs template, after girder construction is built and maintenance completes, the first connector 21 is integrally formed in loop configuration.
Embodiment:
One, Outline on Project
As shown in figure 11, periphery, stadium is rounded, and outermost radius is 143.4m, and near oval inside stadium, the long axis length of this ellipse is 195m, and minor axis length is 132m, Zhou Changyue 545m.The whole building area in stadium is 133600m
2, wherein, the first floor area in stadium is about 44000m
2, do not arrange deformation joint in the design in stadium, this stadium belongs to large area ultra-long concrete floor structure.Stadium is designed with 64,000 seats altogether, and grandstand peak is 44.28m.
The engineering construction area in this stadium is large, and building girth is long, various super-long structural and component many, and various super-long structural component all needs to carry out Crack Control and control.
In this stadium, large area prestressing force annular concrete structure construction and Crack Control, be one of giving top priority to what is the most important of work progress, divide different construction section in construction according to the different area in East, West, South, North district.When carrying out the construction of large area overlength floor structure, apply the concrete structure seamless construction method adopting sliding support, and take responsible measures on Material selec-tion and construction method, thus realize all not occurring the contraction that is harmful to and thermal cracking in construction period and operating period.
Two, concrete raw material and match ratio
Floor girder and board adopts C40 concrete, the material usage of every cubic metre: P.O42.5 cement 410kg, 2.5 river sand 688kg, 5-31.5 stone 1077kg, JM-8 Admixture 6.44kg, water 175kg, II grade of flyash 50kg, polypropylene fibre (red strong silk) 0.8kg.Wherein, adding of JM-8 Admixture there is slow setting, pumping and efficient humidification.
Grandstand (or outdoor structure) adopts C40 concrete, the material usage of every cubic metre: P.O42.5 cement 367kg, 2.5 river sand 710kg, 5 ~ 31.5 stone 1065kg, JM-III (B) Admixture 33kg, water 175kg, II grade of flyash 50kg, polypropylene fibre (red strong silk) 0.8kg.Wherein, JM-III (B) Admixture has cracking resistance, prevents blending efficient humidification.
Three, the setting of sliding support 2
Floor girder and board is loop configuration, floor girder and board bottom arranges sliding support 2, to discharge its radial constraint, make floor girder and board diametrically can Free Transform, to discharge its radial constraint, thus reduce concrete structure 1 and reduced by temperature or autogenous shrinkage and the stress that produces, and then effectively control distress in concrete.
Wherein, the setting position of floor girder and board sliding support 2 is as shown in stain position in Figure 11, and the sectional drawing of the sliding support 2 of employing as shown in Figure 8.
Four, the selecting of concrete blinding and support member
The floor structure in stadium is annular, for ease of construction, is divided into multistage to construct annular floor structure.Annular floor structure comprises multiple Vierendeel girder, the end to end looping of multiple Vierendeel girder.
The sectional dimension of each Vierendeel girder and span are all larger, and the radical length of each Vierendeel girder is 8m, and the hoop length of each Vierendeel girder reaches 14.6m, and here, hoop length refers to Vierendeel girder along the size in the peripheral direction in stadium.
The concrete blinding of Vierendeel girder adopts the thick bamboo splint of 12mm or nine clamping plate to make large form.
Annular floor structure also comprises load-bearing pillar, and diameter is that the cylinder of 0.8m can adopt the thick steel plate of 4mm to build concrete blinding, and diameter is that the cylinder of 1.2m can adopt the thick steel plate of 5mm to build concrete blinding.
In addition, concrete blinding adopts total sub-semigroup or design of coupler scaffold to support.
Five, reinforcement engineering construction
Non-prestressing tendon at the bottom of first colligation construction beam, then install unbonded tendon and have bonding muscle bellows, is then installed with bonding muscle, and according to designing requirement, determines unbonded tendon and has the rise of bonding muscle, then the upper reinforcement of colligation beam and floor bar.
Six, concrete floor structure block placement construction
By the Work sectors of above-mentioned division, adopt pumping of concrete, segmentation is built.
In each Work sectors, primary concreting is complete, does not allow to occur cold joint.After the first section concreting, its intensity reaches design strength 75%, when namely reaching C30, can carry out the stretch-draw of presstressed reinforcing steel in the constuction joint position of this section of two ends indwelling (the wide prestressing force pull working face of 2m).The template of other sections, reinforcing bar and concrete construction can be carried out simultaneously.
After segmental concrete flooring is built, covered with plastic film, wet gunnysack should carry out moisture-keeping maintaining in time, curing time is no less than 14 days.
Seven, form removable
Because Vierendeel girder span major part is at more than 8m, Vierendeel girder must reach design strength, and presstressed reinforcing steel must the complete dismounting just carrying out shuttering supporting of stretch-draw.During form removal, first remove Bars In Poured Concrete Slab lower support, then remove the support of hoop beam, finally remove radial girders and support.
In the description of this manual, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and describe embodiments of the invention, those having ordinary skill in the art will appreciate that: can carry out multiple change, amendment, replacement and modification to these embodiments when not departing from principle of the present invention and aim, scope of the present invention is by claim and equivalents thereof.
Claims (11)
1. one kind adopts the concrete structure seamless construction method of sliding support, it is characterized in that, between first, second concrete structure interconnective, sliding support is set, described sliding support comprises can the first connector of relative sliding and the second connector, described first concrete structure is connected with described first connector, described second concrete structure is connected with described second connector, wherein drives described first connector and described second connector relative sliding when described first concrete structure or described second concrete structure distortion.
2. the concrete structure seamless construction method of employing sliding support according to claim 1, it is characterized in that, described first concrete structure is long strip type structure, and the glide direction between described first connector and described second connector is parallel with the length direction of described first concrete structure.
3. the concrete structure seamless construction method of employing sliding support according to claim 1, it is characterized in that, described first concrete structure is loop configuration, the glide direction between described first connector and described second connector and described first concrete structure radial parallel.
4. the concrete structure seamless construction method of employing sliding support according to claim 1, it is characterized in that, described first concrete structure is plated construction, the plane parallel at the glide direction between described first connector and described second connector and described first concrete structure place.
5. the concrete structure seamless construction method of employing sliding support according to claim 1, is characterized in that, the step that described concrete structure arranges described sliding support comprises:
S1: the formwork for placing installing described first concrete structure, assembling reinforcement;
S2: build and the first concrete structure described in maintenance;
S3: described sliding support is fixed on described first concrete structure, wherein, described first connector is connected on described first concrete structure;
S4: the formwork for placing installing described second concrete structure on the second connector, assembling reinforcement;
S5: build and the second concrete structure described in maintenance;
S6: the junction of described second connector and described second concrete structure is carried out checking, reinforcing.
6. the concrete structure seamless construction method of employing sliding support according to claim 1, is characterized in that, the step that concrete structure arranges sliding support comprises:
S1 ': the template installing described first concrete structure and described second concrete structure respectively;
S2 ': the reinforcing bar of the first concrete structure and described second concrete structure described in colligation respectively;
S3 ': respectively the concrete of described first concrete structure and described second concrete structure is built;
S4 ': respectively maintenance is carried out to described first concrete structure and described second concrete structure;
S5 ': after described first concrete structure and described second concrete structure maintenance complete, first connector is fixed on described first concrete structure, again the second connector is fixed on described second concrete structure, afterwards the first concrete structure being provided with the first connector is carried on described second concrete structure, then connects described first connector and described second connector.
7. the concrete structure seamless construction method of the employing sliding support according to claim 5 or 6, is characterized in that, described sliding support is bolted on the steel work of described first concrete structure and described second concrete structure.
8. the concrete structure seamless construction method of employing sliding support according to claim 1, it is characterized in that, described first connector is the seat of honour, the described seat of honour is fixed on described first concrete structure, described second connector is lower seat, described lower seat is fixed on described second concrete structure, is connected between the described seat of honour with described lower seat with sliding component.
9. the concrete structure seamless construction method of employing sliding support according to claim 1, it is characterized in that, described second connector is line slideway, described first connector is slide block, described slide block is engaged to described line slideway, is connected between described slide block with described line slideway by steel ball.
10. the concrete structure seamless construction method of employing sliding support according to claim 1, it is characterized in that, described first connector comprises the seat of honour and the centre of sphere, the described seat of honour is fixed on described first concrete structure, the described centre of sphere be located at the described seat of honour towards on the end face of described second connector;
Described second connector on the end face of described first connector, be formed with the groove be slidably matched with the described centre of sphere.
The concrete structure seamless construction method of 11. employing sliding supports according to claim 10, it is characterized in that, described sliding support also comprises:
Two guide blocks, described two guide blocks extend from the opposing sidewalls being positioned at described groove both sides of described second connector towards direction away from each other respectively;
Two extension boards, described two extension boards to be located on the described seat of honour and to limit sliding space between each described extension board and the described seat of honour, and described two guide blocks are located in described sliding space respectively slidably.
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