CN105239594A - Prestressed pipe pile upright - Google Patents
Prestressed pipe pile upright Download PDFInfo
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- CN105239594A CN105239594A CN201510726504.6A CN201510726504A CN105239594A CN 105239594 A CN105239594 A CN 105239594A CN 201510726504 A CN201510726504 A CN 201510726504A CN 105239594 A CN105239594 A CN 105239594A
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Abstract
The invention discloses a prestressed pipe pile upright. The prestressed pipe pile upright comprises a steel lattice post, a pipe pile and a pipe pile core insert. The pipe pile core insert is coaxially and fixedly connected with the lower end of the steel lattice post and fixedly inserted into the pipe pile in an annular column shape. The lower end of the steel lattice post is fixedly connected with the upper end of the pipe pile core insert. The upper end of the pipe pile core insert is connected with a pipe pile end plate on the top of the pipe pile. The lower end of the pipe pile core insert is fixedly provided with a layer board. A pouring space is formed by the layer board and the inner side gap, above the layer board, of the pipe pile and is filled with expansive concrete in a poured mode. The prestressed pipe pile and the steel lattice post are combined together to serve as an upright system for a deep foundation pit horizontal support, the system is high in construction speed, expenses are reduced, large moment of inertia is provided, the function of improving the whole rigidity is achieved, and the superiority that the steel lattice post is connected with the support at the upper portion of a foundation pit and penetrates through a bottom board for waterproof construction is fully played at the same time.
Description
Technical field
The present invention relates to the column in a kind of deep foundation ditch inner support system, particularly a kind of pile for prestressed pipe column, also can be applicable to the tower crane combined type basis be placed in deep foundation ditch.
Background technology
In recent years, along with rapid development of economy, land intensification exploitation has been subject to more and more higher attention, and the application of the ultra-deep underground space also gets more and more, and especially in High-Density Urban Area, especially deeply, large foundation ditch is widely used.For comparatively deep foundation ditch, as guarantee deep foundation pit support safety and reduce as far as possible on surrounding enviroment impact measure---inner support is widely used.
As inner support system, general employing steel work or concrete structure.For Large Foundation Pit system, because first floor support system may exist pulling force, and for super foundation, first road supports and usually needs to arrange trestle, or solve larger temperature deformation impact, in addition reinforced concrete inner support system is comparatively reliable with the connected node (being usually connected with Guan Liang) of vertical structural protective system, less again relative to steel structure support for temperature deformation concrete structure, thus reinforced concrete support system is widely used.The ground such as Shanghai are clearly in design of deep foundation pit, and for there being inner support system, clear and definite first road support must adopt reinforced concrete support system.But concrete support system is relative to steel support structure, and weight is larger.Therefore require corresponding higher to the column of support level braced structures.As the bearing that concrete horizontal supports, mainly bear concrete support deadweight and corresponding working load (trestle etc.), for super foundation, multiple tracks supports, and also must bear the load tearing support machinery open.Therefore, the requirement of column is corresponding higher.
Current column system often adopts bored pile+steel lattice column, prefabricated tubular pile, or the pattern of precast square pile, also has part engineering directly to adopt steel pipe pile.The connection of column and brace summer is mainly solved for the column be used in deep foundation ditch inner support, column wears the anti-water problem of basement bottom board.Below one by one the pluses and minuses of existing column are analyzed, are mainly:
1, the column pattern of bored pile+steel lattice column
As a kind of conventional foundation ditch column pattern, bored pile+steel lattice column (steel pipe, shaped steel) mainly has the following advantages:
(1) various soil layer and different Foundation Pit can be applicable to;
(2) can effectively the vertical load that concrete support is born be delivered in stand column pile basis;
(3) insert bored pile certain depth by steel lattice column, and weld with the main muscle of bored pile thus the connection of steel lattice column and bored pile can be solved easily;
Shortcoming is mainly:
(1) adopt bored pile construction, corresponding economic cost is higher, can produce mud contamination in work progress simultaneously.
(2) the more difficult control of the verticality of steel lattice column, and the more difficult control in the direction in steel lattice column cross section, so that when brace summer is constructed, the reinforcing bar of brace summer cannot pass through steel lattice column, also have a negative impact carrying the node of support and steel lattice column, simultaneously because degree control is bad, greatly reduce the supporting capacity of steel lattice column, the project even had also needs to strengthen.
2, pile for prestressed pipe is directly as the pattern of column
This kind of column pattern was once used in District of Shanghai, and major advantage has:
(1) construction quality of pile for prestressed pipe can ensure to some extent, and speed of application is fast, and does not need the curing time more grown.
(2) due in prestressing pipe pile construction process, mud is not produced, when adopting static pressure construction, little to ambient conditions.
(3) pile for prestressed pipe is as a kind of finished product, compares economically and has large advantage.
The shortcoming existed:
(1) comparatively complicated with the connected node of brace summer;
(2) column passes through the more difficult construction of waterproofing node of base plate.
3, precast square pile is directly as the pattern of column
First this kind of column pattern wait people to propose by the yellow wide dragon of Nanjing University of Technology, and its feature and pile for prestressed pipe are comparatively similar, simultaneously for the shortcoming that pile for prestressed pipe exists, set up in precast square pile corner the connection that angle steel solves preformed pile and support.But it is comparatively complicated in the process of passing through waterproof slab.
Summary of the invention
In order to make up above deficiency, the invention provides a kind of pile for prestressed pipe+steel lattice column column pattern, this pile for prestressed pipe+steel lattice column column system stiffness is strong, and economy is relatively easily constructed again.
The present invention in order to the technical scheme solving its technical problem and adopt is: a kind of pile for prestressed pipe column, comprise steel lattice column, pile tube and pile tube lock pin, pile tube lock pin is coaxially fixedly connected on steel lattice column lower end, pile tube lock pin is fixedly inserted in the pile tube of circular cylindrical, steel lattice column lower end is fixedly connected with pile tube lock pin upper end, pile tube lock pin upper end is connected with the pile end board at pile tube top, pile tube lock pin lower end is installed with supporting plate, the space, inner side that supporting plate and pile tube are positioned at supporting plate upper section forms a pouring space, in this pouring space, pouring has expansive concrete.
As a further improvement on the present invention, described pile tube lock pin upper end is installed with en plaque annular and connects end plate, described connection end plate backstop in pile end board uper side surface, and connects end plate and is fixedly connected with between pile end board, steel lattice column lower end be connected end plate uper side surface and be fixedly connected with.
As a further improvement on the present invention, the end winding support of described steel lattice column lower end is provided with some triangle stiffeners, triangle stiffener is fixedly connected with the connection end plate of pile tube lock pin upper end, triangle stiffener lays respectively at outside each batten plate and inside L shape angle steel, triangle stiffener inside L shape angle steel is just positioned at the corner of L shape angle steel, and and angle between L shape angle steel sidewall be 45 °.
As a further improvement on the present invention, sponge strip is folded with between described supporting plate periphery and pile tube inside wall.
As a further improvement on the present invention, described pile tube lock pin is identical with steel lattice column structure, comprise four L shape angle steel and some groups of batten plates, described four L shape angle steel surround a square structure, often organize four blocks of batten plates, four blocks of batten plates fixedly fit in outside two L shape angle steel of each side of square structure respectively, some groups of batten plates are spaced along L shape angle steel length direction, L shape angle steel and batten plate form a square frame shape column structure, though steel lattice column is identical with the steel lattice column structural shape of pile tube lock pin part, designing requirement is different.
As a further improvement on the present invention, described steel lattice column upper end is provided with the plectane identical with pile tube diameter, for hammering method and top platen press construction, enable hammering stress or top compressive stress more evenly pass to steel lattice column, and hammering, top pressure and armful Pile feeder depressed more evenly can pass to steel lattice column.
As a further improvement on the present invention, steel lattice column is also provided with according to tube pile construction technological requirement difference and embraces flattening bench, this armful of flattening bench comprises external fixed cover and is located at the annular steel loop of steel lattice column and some reinforcing ribs, described each reinforcing rib two ends are fixedly connected with steel loop medial surface with corresponding batten plate lateral surface (or on steel lattice column " L " type angle steel) respectively, the steel lattice column inside of embracing flattening bench place is also filled with concrete, embrace flattening bench to be used for embracing platen press construction, the construction of embracing and pressing fixture to carry out steel latticework shell of column is smoothly solved by embracing flattening bench, an armful flattening bench for static pressure construction also can be arranged on hammering and send out and push up in platen press, thus promote the self stability of steel lattice column in work progress, if desired, monobloc cast concrete in the square space that can be formed at steel lattice column, thus promote the self stability of steel lattice column further, thus guarantee to meet working load demand, during excavation of foundation pit, synchronously can cut the concrete in the square space of steel lattice column formation, thus be convenient to support, the concrete construction in the regions such as base plate.
As a further improvement on the present invention, described some armfuls of flattening benchs are evenly spaced to be arranged on steel lattice column, and embracing spacing between flattening bench is between two 1.5-2.0m, thus is convenient to the construction of embracing pressure fixture.
As a further improvement on the present invention; described connection end plate is respectively equipped with some air-vents that position is just right; this some air-vent is just just right with pouring locus; thus guarantee when concrete casting is vibrated; can be vented; guarantee concrete compaction, can offer 8 diameters at connection end plate top is 10mm air-vent.
The present invention, by appropriate design pile tube lock pin, solves the connectivity problem of pile tube and steel lattice column; And embrace flattening bench by design, in steel lattice column, carry out total cross-section if desired fill with core, solve construction problem.
Advantageous Effects of the present invention is: pile for prestressed pipe and steel lattice column combine as the column system on deep foundation ditch horizontal support (tower crane combined type basis) by the present invention, the vertical load that horizontal struts system transmission comes is delivered to pile for prestressed pipe by steel lattice column by this system, the advantage of this kind of node is mainly: given full play to the superiority of pile for prestressed pipe as pressure bearing pile, speed of application is very fast simultaneously, relative to bored pile, many expenses can be saved economically, greatly accelerate in construction speed simultaneously; Utilize steel lattice column, but not steel pipe, take full advantage of steel lattice column square-section pattern under same homalographic, there is comparatively Great inertia square, promote the effect of integral rigidity, give full play to steel lattice column in foundation ditch top and support and connection, the superiority of passing through Slab Waterproof Construction simultaneously.
Accompanying drawing explanation
Fig. 1 is structural principle front view of the present invention;
Fig. 2 is A-A portion sectional view in Fig. 1;
Fig. 3 is B-B portion sectional view in Fig. 1;
Fig. 4 be in Fig. 1 C-C to sectional view;
Fig. 5 is D-D portion sectional view in Fig. 1;
Fig. 6 is E-E portion sectional view in Fig. 1;
Fig. 7 be in Fig. 1 F-F to sectional view;
Fig. 8 is a kind of stiffener structural principle schematic diagram;
Fig. 9 is another kind of stiffener structural principle schematic diagram;
Figure 10 is link plated construction principle schematic.
Detailed description of the invention
For realizing this column pattern of pile for prestressed pipe+steel lattice column, mainly solve steel lattice column 1 and the connected node problem of pile for prestressed pipe 2 in design, after construction mainly solves pile for prestressed pipe+steel lattice column, how under guarantee steel lattice column 1 with pile for prestressed pipe 2 node construction quality situation, to adopt static pressure pile process to construct.The present embodiment incorporation engineering case, by experiment, have developed the column pattern of a set of pile for prestressed pipe 2+ steel lattice column 1, the vertical force transfer system of the horizontal support as deep foundation ditch.
In design, according to pile for prestressed pipe 2 atlas, pile for prestressed pipe 2 diameter conventional in building engineering is not from 400 to 800 etc., in existing Brace in Deep Footing Groove, one support system, steel post generally needs the vertical load standard value of bearing at about 1000kN, twice support system, and the vertical load standard value that steel post bears is in 2500kN (containing trestle load) left and right.And in tower crane, bored pile+steel lattice column 1 combined type base form, the vertical load (standard value is about 1000kN) that single pile bears is relative to all less in base pit engineering, and resistance to plucking load is relative not high yet.Therefore in the design, mainly support as object using foundation ditch, tower crane can adopt similar approach design.
Embodiment: a kind of pile for prestressed pipe column, comprise steel lattice column 1, pile tube 2 and pile tube lock pin 3, pile tube lock pin 3 is coaxially fixedly connected on steel lattice column 1 lower end, pile tube lock pin 3 is fixedly inserted in the pile tube 2 of circular cylindrical, steel lattice column 1 lower end is fixedly connected with pile tube lock pin 3 upper end, pile tube lock pin 3 upper end is connected with the pile end board 5 at pile tube 2 top, pile tube lock pin 3 lower end is installed with supporting plate, the space, inner side that supporting plate and pile tube 2 are positioned at supporting plate upper section forms a pouring space, and in this pouring space, pouring has expansive concrete 14.
Wherein:
Steel lattice column 1 generally comprises four L-type angle steel and some groups of batten plates 10, four L shape angle steel surround a square structure, often organize four blocks of batten plates 10, four blocks of batten plates 10 fixedly fit in outside two L shape angle steel 9 of each side of square structure respectively, some groups of batten plates 10 are spaced along L shape angle steel 9 length direction, it is overall that L shape angle steel 9 and batten plate 10 form a square frame shape column structure, its cross section is not generally 420 ~ 470 not etc., vertical supporting power according to bearing designs, therefore, the diagonal line length in cross section is 594 ~ 665, in different construction methods, steel lattice column 1 structure design is as follows:
(1) hammering method: steel lattice column 1 not only will bear the load that support is transmitted, also should meet the hammering stress produced in hammering work progress, before design, fully should understand the condition of construction of adjacent engineering pile, especially working load, check according to " technical code for building pile foundation " again, guarantee that steel lattice column 1 carrying can meet construction requirement (carrying out if desired drawing hole construction), the plectane identical with pile tube 2 diameter is set up at top, thickness is consistent with pile end board 5, weld with steel lattice column 1, material is Q235B level, thus guarantee in hammering process, hammering stress can more evenly pass to steel lattice column 1, and under hammering, Pile feeder can more evenly pass to steel lattice column 1.
(2) platen press is pushed up: similar with hammering method, steel lattice column 1 not only will bear the load that support is transmitted, also should bear in work progress and push up compressive stress, can according to the 1.5 times of considerations estimating ultimate bearing capacity, or determined (carrying out drawing hole if desired to construct) by periphery pile tube 2 pile driving pressure pushed up in pressure work progress, check according to " technical code for building pile foundation " again, guarantee that steel lattice column 1 carrying can meet construction requirement, the same hammering method in top, the plectane identical with pile tube 2 diameter is set up at top, thickness is consistent with pile end board 5, weld with steel lattice column 1, material is Q235B level, thus guarantee that top presses through in journey, top compressive stress can more evenly pass to steel lattice column 1, and in top pressure, Pile feeder can more evenly pass to steel lattice column 1.
(3) platen press is embraced: similar with top platen press, steel lattice column 1 not only will bear the load that support is transmitted, and also should bear in work progress and embraces compressive stress.Before design, fully should understand the condition of construction of adjacent engineering pile, especially working load (carrying out if desired drawing hole construction), then check according to " technical code for building pile foundation ", guarantee that steel lattice column 1 carrying can meet construction requirement.The same hammering method in top, the plectane identical with pile tube 2 diameter is set up at top, and thickness is consistent with pile end board 5, welds with steel lattice column 1, and material is Q235B level, thus guarantee embrace press through in journey, Pile feeder can more evenly pass to steel lattice column 1.Because steel lattice column 1 is square-section, and pile tube 2 is circular cross-section, is correspondingly carrying out in pile tube 2 work progress, and the fixture embracing pressure, only for pile tube 2, cannot be suitable for for rectangle.Therefore, this novel process arranges armful flattening bench consistent with pile tube 2 diameter at steel lattice column 1 diverse location, thus solves the construction utilizing pile tube 2 armfuls pressure fixture to carry out steel lattice column 1 section smoothly, specific as follows:
1) setting position of flattening bench is embraced: embrace the thickness of the pressure stroke of fixture and basement bottom board, basement floor location, the position of support and thickness according to Static pressure pile driver and arrange, embracing a flattening bench needs to avoid the positions such as basement bottom board, basement floor, support.The spacing of embracing flattening bench is generally arranged according to 1.5m ~ 2.0m, and a set armful flattening bench all should be in concentric with pile tube 2, and error should control within 5mm;
2) requirement of flattening bench is embraced: needing to arrange the position of embracing flattening bench, adopting the steel plate of 3mm to be made into is highly 500mm annular steel loop 11 identical with pile tube 2 diameter, be connected with steel lattice column 1 batten plate 10 by reinforcing rib 12, inner pouring C40 concrete 13;
Remarks: armful flattening bench for static pressure construction also can be arranged on hammering and send out and push up in platen press, thus promotes the self stability of steel lattice column 1 in work progress.If desired, total length in steel lattice column 1 total cross-section can water the concrete 13 consistent with embracing flattening bench label, the stability of further lifting steel lattice column 1, during excavation of foundation pit, synchronously can cut the concrete 13 in steel lattice column 1 and embrace flattening bench, thus guaranteeing that steel lattice column 1 passes through the construction quality in the region such as base plate and support.
Pile tube 2 is Ring-cylindrical structure, the catercorner length that its diameter is mainly formed according to born steel lattice column 1 cross section determined, require that pile tube 2 diameter (d) should be greater than the cornerwise length in steel lattice column 1 square-section (b), i.e. d >=1414*b, the wall thickness (t) of pile tube 2 should guarantee that four angle steel of steel lattice column 1 are all positioned on pile tube 2 cross section, the L-type angle steel wall thickness of i.e. t >=(b-d)/2+ steel lattice column 1, as for the length of side being steel lattice column 1 cross section of 420mm, catercorner length is 594mm, can select diameter be 600 pile tube 2, the pile tube 2 of the desirable 130mm of wall thickness, the length of pile tube 2 can be born foundation ditch by column and support the vertical load transmitted, according to " technical code for building pile foundation " JGJ94-2008, survey according to ground the soil parameters that data provides to calculate, for guaranteeing that pile tube 2 can enter projected depth in work progress, guarantee to meet load bearing requirements simultaneously, location hole must be surveyed to the ground of each stand column pile to confirm, carry out benefit if desired and survey, the determination of pile tube 2 classification, considers that foundation ditch soil body during excavating is lifted on existing, produces pulling force upwards, should select AB type, Type B pile tube 2 in soft clay area to pile tube 2.
Pile tube lock pin 3 is mainly used in the connection of steel lattice column 1 and pile tube 2, its upper end is welded with and connects end plate 6, its lower end and supporting plate are welded to connect, pile tube lock pin 3 adopts the structure of steel lattice column 1, generally select four L-type angle steel and some groups of batten plates 10 by welding besieged city square frame shape column structure, its cross section surrounded is determined according to pile tube 2 internal diameter size (d0), i.e. d0=d-2t, if diameter is 600mm, wall thickness is the pile tube 2 of 130mm, then inner void diameter is 600-2*130=340mm, consider in pile tube 2 concrete 13 centrifugal process, hole inwall has part uneven, generally 20mm can be considered, the cross section length of side (b0) of corresponding lock pin steel lattice column 1 can be selected by following formula: b0=(d0-2*20)/1.414, the corresponding single L-type angle steel length of side should not be greater than (b0-30mm)/2 (deduct 30mm in formula and mainly consider that lock pin concrete 13 can through the interval L-type steel), material can select Q235 type, be 130mm for wall thickness, diameter is the pile tube 2 of 600mm, the desirable 210mm of the length of side of lock pin steel lattice column 1, the specification of the desirable L80 of angle steel of lock pin steel lattice column 1.
The L-type angle steel of pile tube lock pin 3 is when selecting, the section area of its L-type angle steel should be greater than joint bar area requirements in atlas " prestressed concrete 13 pile tube 2 " Soviet Union G03-2012 or " prestressed concrete 13 pile tube 2 " 10G409, and 0.5 times that the L-type angle cross section that should not be less than upper steel lattice column 1 is long-pending, thus guarantee that power effectively can be passed to pile for prestressed pipe 2 by upper steel lattice column 1, batten plate 10 designs according to " Code for design of steel structures ": as being 130 for wall thickness, diameter is the pile tube 2 of 600, the steel lattice column 1 on top is the angle steel composition of 4 L125*10, the lock pin of bottom can select the angle steel of 4L80*10, corresponding batten plate 10 can select the steel plate of 180*100*6, the equidistant welding in interval 500, the length of lock pin steel lattice column 1 can according to pile tube 2 diameter being not less than 5 times, and be not less than 2.0m selection, i.e. 5d, pile tube 2 for 600, namely 3000mm is selected.
Steel lattice column 1, fixed connection structure between pile tube lock pin 3 and pile tube 2 are: pile tube lock pin 3 upper end is installed with en plaque and connects end plate 6, connect end plate 6 to be welded to connect with the tubulose end plate of pile tube 2 upper end, steel lattice column 1 lower end be connected end plate 6 uper side surface and be fixedly connected with, wherein:
The connection end plate 6 of pile tube lock pin 3 upper end is when selecting, connect end plate 6 and adopt the annulus pattern consistent with pile end board 5 thickness and material, i.e. material selection Q235B, thickness is 25mm, connect end plate 6 consistent with pile tube 2 diameter with the external diameter of pile end board 5, and at the lower limb connecting end plate 6, consistent just right groove is set with pile end board 5 top edge, for guaranteeing weld seam, the internal diameter connecting end plate 6 considers building of lock pin concrete 13, consider according to 100 ~ 120mm, simultaneously in order to ensure lock pin concrete 13 vibration compacting, all offering 8 diameters at the top connecting end plate 6 and pile end board 5 is 10mm air-vent 15, build for discharging concrete 13, air when vibrating.Connect end plate 6 bottom surface to weld with the steel lattice column 1 of pile tube lock pin 3, all connecting portions all carry out full weld, and weld bead height must not be less than 8mm.
Supporting plate adopts the round iron plate that 3mm is thick to make, and material Q235, diameter is determined according to pile tube 2 internal diameter size, i.e. d0-20mm, is 600mm for diameter, and wall thickness is the pile tube 2 of 130mm, the desirable 320mm of supporting plate diameter.The steel lattice column 1 of supporting plate and pile tube lock pin 3 adopts and is welded to connect.
For guaranteeing pile tube 2 and steel lattice column 1 integrated connection, emphasis solves the connection of steel lattice column 1 and pile tube lock pin 3, and concrete syndeton is as follows:
Triangle stiffener 7 is set up in steel lattice column 1 bottom, steel lattice column 1 welds with the connection end plate 6 of pile tube lock pin 3, and welded by the triangle stiffener 7 strengthened, the dimensional height of triangle stiffener 7 is batten plate 10 height of steel lattice column 1, desirable (the d-b)/2-5mm of the stiffener length of side outside steel lattice column 1, the thickness-40mm of L-type angle steel in the stiffener length of side desirable (the d-120mm)/2-2* steel lattice column 1 inside steel lattice column 1.
Pile tube lock pin 3 is connected mainly through welding to region placing of concrete 13 between pile tube lock pin 3 and pile tube 2 and by the connection end plate 6 of pile tube lock pin 3 and pile end board 5 with pile tube 2, spillage is there is when when placing of concrete 13 being and preventing the concrete 13 watered from vibrating, sponge strip 8 is set up in supporting plate 4 surrounding, placing of concrete 13 adopts C40 slightly expanded concrete 14, thus guarantees that lock pin steel lattice column 1 is fully connected with pile tube 2.Connect end plate 6 and pile tube 2 connection request in satisfied " prestressed concrete 13 pile tube 2 " atlas of weldquality palpus of pile end board 5.
The technological process of the present invention when constructing is as follows:
1, hammering method
(1) type selecting of equipment, the ultimate bearing capacity of estimating according to pile tube 2 is selected;
(2) hammer-impact construction technique:
1) the good steel lattice column of segmental machining 1 (containing embracing flattening bench and the inner placing of concrete 13 of steel lattice column if desired 1), pile tube lock pin 3 and pile tube 2 as requested;
2) surveying setting-out fixed pile;
3) carry out hammering construction according to the pile tube 2 of designing requirement, the verticality of pile tube 2 should be kept in hammering work progress, treat that final section pile tube 2 top marks are higher than natural about ground level 1.2m, stop hammering;
4) purge tube pile end plate 5, starts to insert pile tube lock pin 3 part, and is welded with pile end board 5 by the connection end plate 6 of pile tube lock pin 3;
5) to be welded complete after, lay one deck Polypropylence Sheet at connection end plate 6 end face of pile tube lock pin 3, from connection end plate 6 endoporus of pile tube lock pin 3, start to build lock pin concrete 13, and carry out vibration compacting, until air-vent is except glowing concrete 13 slurries, remove the Polypropylence Sheet connecting end plate 6;
6) start to lift steel lattice column 1, (length of side direction is general parallel with main support direction for the cross-wise direction of adjustment steel lattice column 1, thus be conducive to row's muscle of supporting), by steel lattice column 1 be connected end plate 6 and weld, and weld the triangle stiffener 7 of inner side and outer side;
7) proceed hammering, according to the method for hammer blow tubular pile 2, steel lattice column 1 is delivered to projected depth.
2, platen press is pushed up
(1) type selecting of equipment: the ultimate bearing capacity of estimating according to pile tube 2 is selected;
(2) construction technology and hammering method similar, only hammering is changed into top pressure.
3, platen press is embraced
(1) type selecting of equipment: the ultimate bearing capacity of estimating according to pile tube 2 is selected;
(2) construction technology:
1) the good steel lattice column of segmental machining 1 (containing embracing flattening bench and the total length placing of concrete 13 if desired in steel lattice column 1 cross section), pile tube lock pin 3 and pile tube 2 is required according to upper joint, for subsequent use after 28 days concrete 13 intensity in armful flattening bench meet the demands;
2) surveying setting-out fixed pile;
3) carrying out embracing pressure construction according to the pile tube 2 of designing requirement, embracing the verticality that should keep pile tube 2 in pressure work progress, treating that final section pile tube 2 top marks are higher than natural about ground level 1.2m, stop static pressure construction;
4) purge tube pile end plate 5, starts to insert pile tube lock pin 3, and pile tube lock pin 3 is connected end plate 6 welds with pile end board 5;
5) to be welded complete after, lay one deck Polypropylence Sheet at connection end plate 6 end face of pile tube lock pin 3, from connection end plate 6 tapping of pile tube lock pin 3, start to build lock pin concrete 13, and carry out vibration compacting, until air-vent is except glowing concrete 13 slurries, remove the Polypropylence Sheet connecting end plate 6;
6) start to lift steel lattice column 1, (length of side direction is general parallel with main support direction for the cross-wise direction of adjustment steel lattice column 1, thus be conducive to row's muscle of supporting), by steel lattice column 1 be connected end plate 6 and weld, and weld the stiffener of inner side and outer side;
7) proceed to embrace pressure construction, the pressure fixture of embracing of now static pressed pile stake machine should tightly by embracing the construction of flattening bench enforcement steel lattice column 1 section, for steel lattice column 1 top mark height in natural ground, adopt Pile feeder to carry out pile follower, until the capital absolute altitude of steel lattice column 1 reaches design elevation.
The Novel upright post pattern that the present invention adopts pile for prestressed pipe 2 and steel lattice column 1 to combine, its feasibility is demonstrated by the successful Application of Engineering Projects, this technology is by combining pile tube and steel lattice column 1, give full play to both advantages, compared with prior art, not only there is very high economic worth, also greatly construction speed is accelerated, this kind of construction technology can decrease the impact on surrounding enviroment largely simultaneously, as mud etc., novelty major embodiment in the following areas:
1, upright post basic part adopts pile for prestressed pipe 2 to replace traditional bored pile; give full play to pile for prestressed pipe 2 unit price bearing capacity on the one hand high; thus greatly reduce the construction cost of stand column pile; simultaneously due to pile for prestressed pipe 2 mud-less pollution in work progress; positive role will be played to the protection of environment; in addition; to greatly promote owing to adopting pile for prestressed pipe 2 speed of application; thus the whole construction speed of engineering can be accelerated; if employing static pressure construction, also will greatly reduce the noise pollution to environment.
2, by designing distinctive pile tube lock pin 3 part, and in conjunction with different pile tube 2 construction characteristic, propose the construction technology of a whole set of this Novel upright post foundation pattern, efficiently solve the connectivity problem of steel lattice column 1 and pile for prestressed pipe 2, thus pile tube 2 is given full play to the advantage of both steel lattice columns 1, simultaneously because the connection end plate 6 of steel lattice column 1 with pile tube lock pin 3 part welds, thus relatively easily control at steel lattice column 1 top mark height under natural ground level certain depth, the direction in steel lattice column 1 cross section and the verticality of steel lattice column 1, largely avoid and adopt bored pile to insert steel lattice column 1 cross-wise direction and should not control, the problem that verticality can not be guaranteed.
3, for the construction characteristic of static pressed pile, flattening bench is embraced by arranging on steel lattice column 1, solve well on the one hand and utilize pile tube 2 construction equipment construction steel lattice column 1 section, thus achieve the combination of steel lattice column 1 and pile tube 2, what arrange at steel lattice column 1 diverse location on the other hand embrace flattening bench and the total length placing of concrete 13 if desired in steel lattice column 1 cross section, the stability of steel lattice column 1 by significant increase.
Claims (9)
1. a pile for prestressed pipe column, it is characterized by: comprise steel lattice column (1), pile tube (2) and pile tube lock pin (3), pile tube lock pin is coaxially fixedly connected on steel lattice column lower end, pile tube lock pin is fixedly inserted in the pile tube of circular cylindrical, steel lattice column lower end is fixedly connected with pile tube lock pin upper end, pile tube lock pin upper end is connected with the pile end board (5) at pile tube top, pile tube lock pin lower end is installed with supporting plate (4), the space, inner side that supporting plate and pile tube are positioned at supporting plate upper section forms a pouring space, in this pouring space, pouring has expansive concrete (14).
2. pile for prestressed pipe column according to claim 1, it is characterized by: described pile tube lock pin upper end is installed with en plaque annular and connects end plate (6), described connection end plate backstop is in pile end board uper side surface, and connect end plate and be fixedly connected with between pile end board, steel lattice column lower end be connected end plate uper side surface and be fixedly connected with.
3. pile for prestressed pipe column according to claim 2, is characterized by: the end winding support of described steel lattice column lower end is provided with some triangle stiffeners (7), and triangle stiffener is fixedly connected with the connection end plate of pile tube lock pin upper end.
4. pile for prestressed pipe column according to claim 1, is characterized by: be folded with sponge strip (8) between described supporting plate periphery and pile tube inside wall.
5. pile for prestressed pipe column according to claim 1, it is characterized by: described pile tube lock pin is identical with steel lattice column structure, include four L shape angle steel (9) and some groups of batten plates (10), described four L shape angle steel surround a square structure, often organize four blocks of batten plates, four blocks of batten plates fixedly fit in outside two L shape angle steel of each side of square structure respectively, some groups of batten plates are spaced along L shape angle steel length direction, and L shape angle steel and batten plate form a square frame shape column structure.
6. pile for prestressed pipe column according to claim 1, is characterized by: described steel lattice column upper end is provided with the plectane identical with pile tube diameter.
7. pile for prestressed pipe column according to claim 1, it is characterized by: steel lattice column is also provided with and embraces flattening bench, this armful of flattening bench comprises annular steel loop (11) and the some reinforcing ribs (12) that external fixed cover is located at steel lattice column, described each reinforcing rib two ends are fixedly connected with steel loop medial surface with corresponding batten plate lateral surface respectively, and the steel lattice column inside of embracing flattening bench place is also filled with concrete (13).
8. pile for prestressed pipe column according to claim 7, is characterized by: described some armfuls of flattening benchs are evenly spaced to be arranged on steel lattice column, and embracing spacing between flattening bench is between two 1.5-2.0m.
9. pile for prestressed pipe column according to claim 1, is characterized by: described connection end plate is respectively equipped with some air-vents (15) that position is just right, and this some air-vent is just just right with pouring locus.
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| CN201510726504.6A CN105239594B (en) | 2015-10-30 | 2015-10-30 | Pile for prestressed pipe column |
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| CN201510726504.6A CN105239594B (en) | 2015-10-30 | 2015-10-30 | Pile for prestressed pipe column |
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| CN105239594A true CN105239594A (en) | 2016-01-13 |
| CN105239594B CN105239594B (en) | 2017-09-29 |
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| CN107012873A (en) * | 2017-04-13 | 2017-08-04 | 中淳高科桩业股份有限公司 | Prestressing force precast latticed column and its manufacture method |
| CN107780533A (en) * | 2017-11-23 | 2018-03-09 | 华东建筑设计研究院有限公司 | A kind of vertical support steel lattice column and prefabricated pile jointing |
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| CN107012873A (en) * | 2017-04-13 | 2017-08-04 | 中淳高科桩业股份有限公司 | Prestressing force precast latticed column and its manufacture method |
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| CN108532637A (en) * | 2018-04-27 | 2018-09-14 | 上海建工二建集团有限公司 | Integrated vertical supporting system in reverse operation stage and mounting method thereof |
| CN109989346B (en) * | 2019-01-10 | 2023-11-10 | 中交第二航务工程局有限公司 | Bridge large-diameter precast concrete tubular column foundation and construction method thereof |
| CN109989346A (en) * | 2019-01-10 | 2019-07-09 | 中交第二航务工程局有限公司 | Bridge major diameter precast concrete tubular column basis and its construction method |
| CN109797753A (en) * | 2019-03-11 | 2019-05-24 | 深圳宏业基岩土科技股份有限公司 | Suitable for the stand column pile of high scar place foundation pit and the construction method of lattice column |
| CN112779848A (en) * | 2021-01-26 | 2021-05-11 | 上海市水利工程设计研究院有限公司 | Novel prefabricated concrete plank road structure and construction method thereof |
| CN113668531A (en) * | 2021-09-15 | 2021-11-19 | 天津大学 | Anti-slip pile control device used in installation of ocean large-diameter tubular pile |
| CN114293583A (en) * | 2021-12-17 | 2022-04-08 | 中国建筑第六工程局有限公司 | Detachable prefabricated pile platform integrated steel bearing platform installation construction method |
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| CN114960753B (en) * | 2022-05-07 | 2024-06-04 | 中铁十八局集团有限公司 | Steel pipe column machining and verticality control method |
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Effective date of registration: 20171024 Address after: 215300, No. 760, Dong Feng Dong Road, Kunshan Development Zone, Suzhou, Jiangsu Patentee after: Jiangsu nine Construction Co., Ltd. Address before: 215300, No. 760, Dong Feng Dong Road, Kunshan Development Zone, Suzhou, Jiangsu Patentee before: JIANGSU ZHONG DA CONSTRUCTION GROUP CO., LTD. |