CN1912254A - Prestressed concrete steel pipe congruent pile and its manufacture and construction method - Google Patents
Prestressed concrete steel pipe congruent pile and its manufacture and construction method Download PDFInfo
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- CN1912254A CN1912254A CN 200610112145 CN200610112145A CN1912254A CN 1912254 A CN1912254 A CN 1912254A CN 200610112145 CN200610112145 CN 200610112145 CN 200610112145 A CN200610112145 A CN 200610112145A CN 1912254 A CN1912254 A CN 1912254A
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Abstract
A method for preparing prestressed concrete steel-tube polypile includes sleeving steel-tube with large diameter over prestressed concrete tubular pile, using end sealing component to connect the two together and injecting grout materials into gap between the two, erecting pile shoe at bottom of said pilypile for pile sinking.
Description
Technical field
The present invention relates to a kind of structure and making and job practices of prestressed concrete congruent pile, refer to a kind of prestressed concrete steel pipe congruent pile that is applicable to the high-bearing capacity in the impacting type piling construction methods engineering, high anti-hammering performance, high-penetrability especially.
Background technology
In the prior art, prestressed concrete pipe pile, because its abundant raw materials, low price, axial bearing capacity is big, and is widely used in horizontal force in the little domestic pile foundation of pile body influence, but because of its steel content low, cause the supporting capacity of horizontal direction relatively poor, when bearing bigger horizontal loading (as wind load, seismic load), rupture easily.
In order to improve pile foundation horizontal direction bearing capacity, begin to have adopted a kind of steel H pile of steel work in recent years in the pile foundation engineering, it has stronger flexing resistance, can carry the load on the bigger horizontal direction, but because the main raw material(s) of described steel H pile is an iron and steel, compare with concrete tubular pile its manufacturing cost have unprecedentedly soaring, thereby can't be used in widely in the domestic various construction work.
In order to improve the bearing capacity of the vertical and horizontal direction of prestressed concrete pipe pile, existing number of patent application: the 200610010620.9 heavy wall prestressed concrete pipe piles of being invented, though can improve corresponding bearing capacity in theory, but because it is to adopt in " thin-walled " prestressed concrete pipe pile the continuous centrifugal concrete preparation method that superposes, cause the concrete exterior portion prestressing force on the whole pile tube cross section big, near the center, the concrete pre-stress that gets on of stack is little even do not have prestressing force, so in the piling process, make easily and do not have prestressed concrete partial rupture, pile body weight is big in addition, causes transportation, constructional difficulties.
Summary of the invention
The problem to be solved in the present invention provides a kind of bearing capacity height, cheap, structural performance is strong, speed of application is fast prestressed concrete steel pipe congruent pile and the making and the job practices of described congruent pile.
In order to address the above problem, prestressed concrete steel pipe congruent pile technical scheme of the present invention comprises the finished product prestressed concrete pipe pile, is enclosed within the permanent steel pipe in its outside, is installed in the end sealer spare at pile cutoff two ends; Fill by grouting agent between described steel pipe and the finished product prestressed concrete pipe pile; In whole stake bottom shoe is installed.
Described permanent steel pipe is a multilayer.
Space between the described permanent steel pipe is filled with grouting agent.
Described permanent steel pipe inner face or outside or the inside and outside two-sided stiffening rib that longitudinal reinforcement or reinforcing cage is installed or arranges along all directions or the steel member of opposing longitudinal shear.
Built packing material in the described prestressed concrete pipe pile.
Dispose longitudinal reinforcement, shaped steel, steel pipe, combination steel member inner core or their any combination isometric or slightly short in the described packing material with prestressed concrete steel pipe congruent pile.
Described end sealer spare is solid steel plate or ring-type steel plate or diameter short steel pipes or the stirrup less than permanent steel pipe, or the termination steel plate of the special finished product prestressed concrete pipe pile that amplifies, and also can be various mechanical type snap joint products.
Adopt between described end sealer spare and steel pipe, finished product prestressed concrete pipe pile and the shoe weld, bond, be threaded, bolt is connected, latch connects, snap close connects or being connected together arbitrarily by them.
Described shoe is that taper shoe or flat shoe or flat shoe bottom surface are welded with and vertically put more energy into steel plate or be welded with various vertical shaped steel or the steel boots of drill rod or their any combination.
Described shoe is steel or cast iron.
Wherein, grouting agent and packing material are cement paste or cement mortar or concrete.
Allocate additive in described grouting agent and the packing material, described additive is reinforcing agent, early strength admixture, water reducing agent, expansion agent, thinner, prevent contracting agent or their any combination.
Correspondingly, the manufacture method of prestressed concrete steel pipe congruent pile of the present invention comprises step:
1) larger-diameter steel pipe is inserted in outside the finished product prestressed concrete pipe pile, adopt with end sealer spare and finished product prestressed concrete pipe pile and permanent steel pipe weld, bond, be threaded, bolt is connected, latch connects, snap close connects or being connected arbitrarily together by them;
2) inject grouting agent by the gap of reserving hole between steel pipe and finished product prestressed concrete pipe pile on permanent steel pipe or end sealer spare, maintenance to grouting agent reaches the design strength value.
Further, the manufacture method of prestressed concrete steel pipe congruent pile of the present invention also comprises step: according to specific design decision, in the inner face of steel pipe or outside or inside and outside two-sided installation longitudinal reinforcement or reinforcing cage or the stiffening rib of arranging along all directions or the steel member of opposing longitudinal shear.
Correspondingly, the job practices of prestressed concrete steel pipe congruent pile of the present invention comprises step:
1) earlier shoe is installed in the bottom of whole stake, adopts hammering or static pressure or method for oscillating or their any combined method to drive piles then;
2) when whole stake be sectional making, adopt weld, bond, be threaded, bolt connects, latch connects, snap close connection or bond or refute stake by their any combination, till the hammering pile penetration reaches designing requirement;
3) require in the finished product prestressed concrete pipe pile, to insert packing material according to specific design;
4) after material to be filled reaches desired strength, cut away the pile body on the top design elevation, connecting reinforcement or horizontal pile crown steel plate or their combination according to pile crown and pile cap are installed in designing requirement form prestressed concrete steel pipe congruent pile.
Job practices of the present invention also comprises step: configuration longitudinal reinforcement, shaped steel, steel pipe, combination steel member inner core or their any combination isometric or slightly short with the prestressed concrete congruent pile in packing material.
Job practices of the present invention also comprises step: whole the stake diverse location of being driven underground is according to the specific design requirement, and prestressed concrete steel pipe congruent pile and finished product prestressed concrete pipe pile or steel H pile are adopted in segmentation.
Job practices of the present invention also comprises step: if described prestressed concrete steel pipe congruent pile is segmentation when squeezing into bearing stratum, then adopts between every section and weld, bond, be threaded or bolt connects or latch connects or snap close connects or sleeve connection or being connected together arbitrarily by them.
Job practices of the present invention also comprises step: before beginning piling, whether decision adopts mechanical prebored hole method as required, hole in advance to stake end design elevation or above a certain position at place, design stake position, in prebored hole, pour into packing material then, the operation of driving piles in the boring that packing material is arranged, packing material are that chiltern is banketed, clay, lime mortar, cement paste, cement mortar, concrete or their any combination; Or directly piling in giving boring, up to the hammering pile penetration that meets design requirement.
Compared with prior art, beneficial effect of the present invention is:
At first, because the shell steel pipe is closely linked with prefabricated concrete pipe pile by cementaceous grouting, make the latter's concrete three dimension stress, the horizontal direction distortion is subjected to the constraint of steel pipe, and its vertical compression intensity is significantly promoted.
Secondly, because steel duct is enriched by concrete tubular pile, fractional load is shared by the latter, compares steel using amount with steel H pile and reduces greatly, and bending rigidity is corresponding to be improved, and can reduce the construction cost of pile foundation greatly.
Range of application of the present invention: the existing adaptable pile foundation engineering of impacting type pile sinking technology, the present invention all can use, and is specially adapted near the high level that soil property is soft and horizontal force is bigger the face of land, the pile foundation of super highrise building.
Description of drawings
Fig. 1 is the whole stake of the congruent pile of a sectional making sectional drawing among the present invention;
Fig. 2 is the sectional drawing that king-pile inner chamber of the present invention has the congruent pile of grouting agent;
Fig. 3 is the sectional drawing that king-pile inner chamber of the present invention has the congruent pile of reinforcing cage grouting agent;
Fig. 4 is along the sectional view of A-A line among Fig. 2;
Fig. 5 is along the sectional view of B-B line among Fig. 2;
Fig. 6 is along the sectional view of C-C line among Fig. 3.
The specific embodiment
To shown in Figure 3, prestressed concrete steel pipe congruent pile comprises as Fig. 1: finished product prestressed concrete pipe pile 1, be enclosed within the permanent steel pipe 2 in its outside, be installed in the end sealer spare 6 at pile cutoff two ends; Fill by grouting agent 3 between described steel pipe and the finished product prestressed concrete pipe pile; In whole stake bottom shoe 4 is installed.
Described finished product prestressed concrete pipe pile 1 is pre-tensioning system or post stressed concrete pile tube, and the size of its prestress value can begin to adjust upward from minimum value of zero according to pile cutoff whole stake vertical position of living in or according to the construction stress difference.Described finished product prestressed concrete pipe pile 1 requires to adopt surface, the convex-concave surface of different-diameter, thickness and different degree of roughness according to specific design.
Seamless steel pipe or welded steel pipe that described permanent steel pipe 2 is various section configurations are formed by whole section of factory or prefabricate.The thickness of this permanent steel pipe 2 can change in segmentation, promptly produces one or more layers structure according to steel pipe's production condition and the stressed needs of congruent pile.Its inner face or outside or the inside and outside two-sided stiffening rib that longitudinal reinforcement or reinforcing cage is installed or arranges along all directions or the steel member of opposing longitudinal shear; Inside and outside surperficial spary has antirust or improves the coating of adhesion stress, and the connection between every section is then adopted welding, bonds, is threaded, latch connects that snap close connects, sleeve connection or linked together by their mode that is connected arbitrarily.For the permanent steel pipe of multilayer (2), the space between layer and the layer is filled with grouting agent (3)
Described grouting agent 3, quilt is watered to be filled between permanent steel pipe 2 and the finished product prestressed concrete pipe pile 1, and this grouting agent 3 can be cement paste, cement mortar or concrete etc.Further, be furnished with additive in the described grouting agent 3, described additive can be reinforcing agent, early strength admixture, water reducing agent, expansion agent, thinner, anti-shrinking medium etc. or their any combination.
Behind the pile sinking in prestressed concrete pipe pile 1 cast in situs packing material 5, described packing material 5 can be cement paste, cement mortar or concrete.Be furnished with additive in the described packing material 5, this additive can be reinforcing agent, early strength admixture, water reducing agent, expansion agent, thinner, anti-shrinking medium etc. or their any combination.
Dispose longitudinal reinforcement, shaped steel, steel pipe, combination steel member inner core or their any combination isometric or slightly short in the described packing material 5 with prestressed concrete steel pipe congruent pile.
The two ends of permanent steel pipe 2 are equipped with port sealing spare 6.Described port sealing spare 6 can be solid steel plate, ring-type steel plate, diameter short steel pipes or the stirrup less than permanent steel pipe.Its with permanent steel pipe 2 and finished product prestressed concrete pipe pile 1 between adopt weld, bond, be threaded, latch is connected, snap close connects or being connected together arbitrarily by them.
Termination, congruent pile bottom is equipped with shoe 4.Described shoe 4 is steel or cast iron.The approved product that this shoe 4 can be a prior art or according to the specially designed any shoe of actual requirement of engineering is welded with as taper shoe 4a or flat shoe or flat shoe bottom surface and vertically puts more energy into steel plate or to be welded with various vertical shaped steel or the steel boots of drill rod or their any combination.Being connected between described shoe 4 and permanent steel pipe 2 and finished product prestressed concrete pipe pile 1 or the sealed piece 6 adopts and weld, is threaded, bolt connects, latch connects, snap close connects, sleeve connection or being connected together arbitrarily by them.
Correspondingly, the manufacture method of prestressed concrete steel pipe congruent pile of the present invention comprises step:
1) larger-diameter steel pipe 2 is inserted in finished product prestressed concrete pipe pile 1;
2) port sealing spare 6 is installed in the two ends of permanent steel pipe 2.
3) grouting agent 3 is injected in the gap between steel pipe 2 and finished product prestressed concrete pipe pile 1.Reach the design strength value to grouting agent 3;
The stiffening rib of longitudinal reinforcement or reinforcing cage 4) can be in advance being installed on inner face, outside or the inside and outside two sides of steel pipe or being arranged along all directions or the steel member of opposing longitudinal shear;
Correspondingly, the job practices of prestressed concrete steel pipe congruent pile of the present invention comprises step:
1) shoe 4 is installed in whole stake bottom;
2) bottom is had the prestressed concrete steel pipe congruent pile section align piles position of shoe 4, adopt hammering, static pressure, method for oscillating or their any combined method to drive piles;
3) when whole stake be sectional making, methods such as employing is welded, is threaded, bolt connection, latch connection, snap close connection, bonding are refuted stake, reach designing requirement until the hammering pile penetration;
4) require in finished product prestressed concrete pipe pile 1, to build packing material 5 according to specific design, described packing material 5 adopts normal pressure method for filling or high pressure pouring method to be poured in the pile tube, packing material end face general requirements surpassed the interim or permanent design elevation certain altitude in stake top when perfusion finished, and adhered to specification with the packing material quality that guarantees pile crown;
5) in packing material 5, insert longitudinal reinforcement, shaped steel, combination steel member inner core or their any combination isometric or slightly short with prestressed concrete steel pipe congruent pile;
6) after material 5 to be filled reaches certain intensity, cut away the pile body on the top design elevation, pile crown and the connecting reinforcement of pile cap, horizontal pile crown steel plate or their combination are installed, form prestressed concrete steel pipe congruent pile in the upper end of whole stake.
According to the specific design requirement of the position of whole the stake of being driven underground, can segmentation adopt prestressed concrete steel pipe congruent pile and finished product prestressed concrete pipe pile or steel H pile.
Before beginning piling, can determine whether adopt mechanical prebored hole method as required.Prebored hole is if desired then holed to stake end design elevation or above a certain position in advance at place, design stake position, directly drives piles in prebored hole again.
Can pour into packing material in prebored hole, described packing material can be that chiltern is banketed, clay, cement, cement mortar or concrete or their any combination, and the operation of driving piles again before described packing material hardens fully.
As shown in Figure 1, this figure is a specific embodiment of prestressed concrete steel pipe congruent pile of the present invention: the congruent pile of sectional making, among this embodiment, permanent steel pipe 2 forms by factory's prefabricate with prestressed concrete pipe pile 1, the slightly larger in diameter of described permanent steel pipe 2 is in the diameter of prestressed concrete pipe pile 1, so it is enclosed within the outside of prestressed concrete pipe pile 1; Pouring has grouting agent 3 between described permanent steel pipe 2 and the concrete tubular pile 1; The two ends of every section congruent pile are equipped with port sealing spare 6, adopt the mode of welding to link together between described port sealing spare 6 and permanent steel pipe 2 and the finished product prestressed concrete pipe pile 1, then adopt the mode of welding to refute stake between the segmentation congruent pile sealed piece 6; Termination, whole stake bottom is equipped with taper shoe 4a; Prestressed concrete pipe pile is built-in with the packing material 5 of building at the scene behind the pile sinking: cement paste or cement mortar or concrete.
As shown in Figure 2, this figure is another specific embodiment of prestressed concrete steel pipe congruent pile of the present invention: the congruent pile that packing material is arranged in the chamber.Among this embodiment, permanent steel pipe 2 and prestressed concrete pipe pile 1 are by whole section prefabricated forming of factory, and the permanent steel pipe 2 that diameter is bigger is enclosed within prestressed concrete pipe pile 1 outside, and pouring has grouting agent 3 between described permanent steel pipe 2 and the concrete tubular pile 1; The congruent pile bottom port is equipped with flat shoe 4b, and the bottom surface of described flat shoe 4b is welded with two blocks of steel plates 9 of vertically putting more energy into, described steel plate 9 decussates of putting more energy into; According to concrete design needs, in the inner chamber of congruent pile, build packing material 5 behind the pile sinking; The congruent pile top port is equipped with pile crown connector 7.Fig. 4 be among Fig. 2 along the profile of A-A line, as shown in Figure 4, be followed successively by from outside to inside: the packing material 5 of permanent steel pipe 2, grouting agent 3, prestressed concrete pipe pile 1 and cast in situs.Fig. 5 be among Fig. 2 along the profile of B-B line, as shown in Figure 5, this executes the example shoe is a flat shoe 4b, described flat shoe 4b is connected with permanent steel pipe 2 by port sealing spare 6, the bottom surface of flat shoe 4b is welded with the steel plate 9 of vertically putting more energy into.
As shown in Figure 3, this figure is another specific embodiment of prestressed concrete steel pipe congruent pile of the present invention: the congruent pile that the reinforcing cage packing material is arranged in the chamber.Among this embodiment, permanent steel pipe 2 and prestressed concrete pipe pile 1 are by whole section prefabricated forming of factory, and the permanent steel pipe 2 that diameter is bigger is enclosed within prestressed concrete pipe pile 1 outside, and pouring has grouting agent 3 between described permanent steel pipe 2 and the concrete tubular pile 1; The congruent pile bottom port is equipped with taper shoe 4a, builds packing material 5 behind the pile sinking in the inner chamber of congruent pile, continues then to build at inner chamber and inserts reinforcing bar 8 in the packing material 5.Fig. 6 be among Fig. 3 along the profile of C-C line, as shown in Figure 6, be followed successively by from outside to inside: the packing material 5 of permanent steel pipe 2, grouting agent 3, prestressed concrete pipe pile 1 and cast in situs, and in packing material 5, insert reinforcing bar 8.
In sum, the main contribution of prestressed concrete steel pipe congruent pile of the present invention is that the permanent steel pipe 2 that diameter is bigger is inserted in finished product prestressed concrete pipe pile 1, significantly promoted it along the axial compressive strength of stake and axial flexural strength of plumb pile and rigidity, and reduced pile crown piling breakage rate largely, correspondingly reduce the overall construction cost on basis and shortened construction duration.
Claims (19)
1. a prestressed concrete steel pipe congruent pile is characterized in that, comprises finished product prestressed concrete pipe pile (1), is enclosed within the permanent steel pipe (2) in its outside, is installed in the end sealer spare (6) at pile cutoff two ends; Fill by grouting agent (3) between described steel pipe (2) and the finished product prestressed concrete pipe pile (1); In whole stake bottom shoe (4) is installed.
2. prestressed concrete steel pipe congruent pile as claimed in claim 1 is characterized in that, described permanent steel pipe (2) is a multilayer.
3. prestressed concrete steel pipe congruent pile as claimed in claim 2 is characterized in that, the space between the described permanent steel pipe (2) is filled with grouting agent (3).
4. as described any one prestressed concrete steel pipe congruent pile of claim 1 to 3, it is characterized in that described permanent steel pipe (2) inner face or outside or the inside and outside two-sided stiffening rib that longitudinal reinforcement or reinforcing cage is installed or arranges along all directions or the steel member of opposing longitudinal shear.
5. prestressed concrete steel pipe congruent pile as claimed in claim 4 is characterized in that, has built packing material (5) in the described prestressed concrete pipe pile (1).
6. prestressed concrete steel pipe congruent pile as claimed in claim 5, it is characterized in that, dispose longitudinal reinforcement, shaped steel, steel pipe, combination steel member inner core or their any combination isometric or slightly short in the described packing material (5) with prestressed concrete steel pipe congruent pile.
7. prestressed concrete steel pipe congruent pile as claimed in claim 6, it is characterized in that, described end sealer spare (6) is solid steel plate or ring-type steel plate or diameter short steel pipes or the stirrup less than permanent steel pipe, or the termination steel plate of the special finished product prestressed concrete pipe pile (1) that amplifies, or be various mechanical type snap joint products.
8. prestressed concrete steel pipe congruent pile as claimed in claim 7, it is characterized in that, adopt between described end sealer spare (6) and steel pipe (2), finished product prestressed concrete pipe pile (1) and the shoe (4) weld, bond, be threaded, bolt is connected, latch connects, snap close connects or being connected together arbitrarily by them.
9. prestressed concrete steel pipe congruent pile as claimed in claim 8, it is characterized in that described shoe (4) is that taper shoe (4a) or flat shoe or flat shoe bottom surface are welded with and vertically put more energy into steel plate or be welded with various vertical shaped steel or the steel boots of drill rod or their any combination.
10. prestressed concrete steel pipe congruent pile as claimed in claim 9 is characterized in that, described shoe (4) is steel or cast iron.
11. prestressed concrete steel pipe congruent pile as claimed in claim 10 is characterized in that, grouting agent (3) and packing material (5) are cement paste or cement mortar or cement lime mortar or concrete.
12. prestressed concrete steel pipe congruent pile as claimed in claim 11, it is characterized in that, allocate additive in described grouting agent (3) and the packing material (5), described additive is reinforcing agent, early strength admixture, water reducing agent, expansion agent, thinner, prevent contracting agent or their any combination.
13. the manufacture method of a prestressed concrete steel pipe congruent pile is characterized in that, comprises the steps:
1) larger-diameter steel pipe (2) is inserted in outside the finished product prestressed concrete pipe pile (1), adopt with end sealer spare (6) and finished product prestressed concrete pipe pile (1) and permanent steel pipe (2) weld, bond, be threaded, bolt is connected, latch connects, snap close connects or being connected arbitrarily together by them;
2) inject grouting agent (3) by the gap of reserving hole between steel pipe (2) and finished product prestressed concrete pipe pile (1) on permanent steel pipe (2) or end sealer spare (6), maintenance to grouting agent (3) reaches the design strength value.
14. manufacture method as claimed in claim 13, it is characterized in that, also comprise step: according to specific design decision, in the inner face of steel pipe (2) or outside or inside and outside two-sided installation longitudinal reinforcement or reinforcing cage or the stiffening rib of arranging along all directions or the steel member of opposing longitudinal shear.
15. the job practices of a prestressed concrete steel pipe congruent pile is characterized in that, comprises the steps:
1) earlier shoe (4) is installed in the bottom of whole stake, adopts hammering or static pressure or method for oscillating or their any combined method to drive piles then;
2) when whole stake is sectional making, then between the end sealer spare (6) of the up and down butt joint of pile cutoff, adopt weld, bond, be threaded, bolt connects, latch connects, snap close connects or bond or refute stake by their any combination, till the hammering pile penetration reaches designing requirement;
3) require in finished product prestressed concrete pipe pile (1), to insert packing material (5) according to specific design;
4) after material to be filled (5) reaches desired strength, cut away the pile body on the top design elevation, connecting reinforcement or horizontal pile crown steel plate or their combination according to pile crown and pile cap are installed in designing requirement form prestressed concrete steel pipe congruent pile.
16. job practices as claimed in claim 15 is characterized in that, also comprises step: configuration longitudinal reinforcement, shaped steel, steel pipe, combination steel member inner core or their any combination isometric or slightly short in packing material (5) with the prestressed concrete congruent pile.
17. job practices as claimed in claim 16 is characterized in that, also comprises step: whole the stake diverse location of being driven underground is according to the specific design requirement, and prestressed concrete steel pipe congruent pile and finished product prestressed concrete pipe pile or steel H pile are adopted in segmentation.
18. job practices as claimed in claim 15, it is characterized in that, also comprise step:, then adopt between every section and weld, bond, be threaded or bolt connects or latch connects or snap close connects or sleeve connection or being connected together arbitrarily by them if described prestressed concrete steel pipe congruent pile is segmentation when squeezing into bearing stratum.
19. job practices as claimed in claim 15, it is characterized in that, also comprise step: before beginning piling, whether decision adopts mechanical prebored hole method as required, hole in advance to stake end design elevation or above a certain position at place, design stake position, in prebored hole, pour into packing material then, the operation of in the boring that packing material is arranged, driving piles, packing material is that chiltern is banketed, clay, lime mortar, cement paste, cement mortar, concrete or their any combination; Or directly piling in giving boring, up to the hammering pile penetration that meets design requirement.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200610112145A CN100577923C (en) | 2006-08-11 | 2006-08-11 | Prestressed concrete steel pipe congruent pile and its manufacture and construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610112145A CN100577923C (en) | 2006-08-11 | 2006-08-11 | Prestressed concrete steel pipe congruent pile and its manufacture and construction method |
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| CN1912254A true CN1912254A (en) | 2007-02-14 |
| CN100577923C CN100577923C (en) | 2010-01-06 |
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