CN201137106Y - High bearing capacity club-footed pile suitable for high-rise building basic construction - Google Patents

Abstract

The utility model relates to a driven prefabricated reinforced concrete belled pile adaptable to foundation engineering of high-rise buildings, which is structurally characterized in that an upper segment is equipped with a steel pipe with the inside equipped with lower inserted reinforcements and concrete, a lower segment prefabricated pile body is internally provided with upper inserted reinforcements and embedded lower inserted reinforcements, the upper inserted reinforcements of the lower segment prefabricated pile body are in lap joint with the lower inserted reinforcements of the upper segment steel pipe, the upper segment steel pipe is integrally connected with the lower segment prefabricated pile body by an upper cast-in-place concrete base, the connection position of the upper segment steel pipe and the lower segment prefabricated pile body is equipped with stabilizing reinforcements, the center of the base is coaxial with that of the pile body, the lower end of the lower segment prefabricated pile body is provided with a cast-in-place concrete base, the cross section of the upper segment steel pipe and the lower segment prefabricated pile body is circular, and the cast-in-place concrete base is internally provided with radial reinforcements. The driven prefabricated reinforced concrete belled pile has wide application scope, obviously increases connection stability and utilization rate of material strength, has higher bearing capacity of one single pile, and is easy to achieve the designed expected effect.

Description

A kind of suitable Tall Building Foundation construction high-bearing capacity expanded bore pile

Technical field

The utility model relates to a kind of expanded bore pile for building, particularly relates to a kind of construction foundation working expanded bore pile that is applicable in the highrise building foundation engineering.

Background technology

The pile foundation engineering that is used for the high building lot of highrise building and requirement for bearing capacity at present generally adopts three kinds of ram-expanded pile, preformed pile and large diameter bored piles.Wherein the large diameter bored pile bearing capacity is the highest, but its involve great expense, work efficiency is low, and is and seriously polluted during construction; The quality of preformed pile is good, bearing capacity is also higher, but the cost of preformed pile is also high at present, generally is used for the higher building of safe class.What wherein be most widely used is ram-expanded pile, and this pile body is a cast-in-situ steel concrete, and pile crown is prefabricated; When executing, earlier the prefabricated pile crown of immersed tube is imbedded the hardpan in the ground, irritate concrete cast pile then; But because the soil property age difference that the earth's crust forms, soft foundation is soft usually with the increase of the crust layer degree of depth, hardpan is alternately state, like this when continuous piling construction, after execute stake and can produce extruding soil layer, the stake that will have influence on perfusion formerly and not solidify fully as yet, especially especially serious at the intersection of weak soil layer and hardpan, broken pile often appears, necking, thereby cause having approximately can't meet the quality requirement of tube-sinking cast-in-situ pile about 20%, force the designer to reduce the standard of bearing capacity of single pile, cause down stake to be gathered, cause soil body gross distortion, even jeopardize the quality of pile body; This another shortcoming is that bearing capacity is low, be to increase bearing capacity, the general way that adopts at the bottom of after irritating concrete cast pile body, adding companding, but because of its utilization add companding at the bottom of mode make the uncertain and standard of its shape size, its application is limited to.Though the suitable Tall Building Foundation construction that the inventor has applied for has solved the problems referred to above with the utility model patent of high-bearing capacity expanded bore pile, but find that in actual use the junction of pile body exists bearing capacity and anti-impact force is weak, the problem of steadiness difference.

The utility model content

The problem that the utility model exists at prior art, and provide a kind of scope of application wide, obviously improve strength of materials utilization rate, bearing capacity of single pile is higher and reach the construction foundation working expanded bore pile of the Expected Results of design, the junction that has solved pile body exists bearing capacity and anti-impact force is weak, the problem of steadiness difference.

The technical scheme that the utility model technical solution problem is adopted is: epimere is set to steel pipe, steel duct is provided with down joint bar and concrete, be provided with the last joint bar of hypomere precast pile in the hypomere precast pile and bury joint bar in advance, the last joint bar of hypomere precast pile overlaps mutually with the following joint bar of epimere steel pipe, by last Cast-in-place concrete base epimere steel pipe and hypomere precast pile are fused again, the internal connection of epimere steel pipe and hypomere precast pile is provided with the firm muscle of chiasma type, the lower end of hypomere precast pile is provided with the Cast-in-place concrete base, the center of Cast-in-place concrete base and Cast-in-place concrete base is coaxial with hypomere precast pile and epimere steel pipe center, the cross section of epimere steel pipe and hypomere precast pile is circular, is provided with the radiation muscle in the cast-in-situ base.

Described vertical section of going up Cast-in-place concrete base and Cast-in-place concrete base be big down little trapezoidal.

The utility model adopts the more piece pile body and expands base more than two, because the performance to the lower bottom base bearing capacity of upper bed-plate produces good influence, being provided with the performance of each section pile body frictional resistance of each base is favourable, make stake be in the state work down of economical rationality all the time, obviously improve the bearing capacity of single pile and the utilization rate of the strength of materials, strengthened steadiness, reach the Expected Results of design easily, satisfy the needs of construction work better, no matter simultaneously applied widely is high level or low-rise building, safe class and ground soil property situation can both be combined into the immersed tube prefabricated multistage under-reamed pile that is complementary with it.

Description of drawings

Fig. 1 is the main TV structure schematic diagram of a kind of suitable Tall Building Foundation construction of the utility model with expanded bore pile.

Among the figure: 1, Cast-in-place concrete base; 2, go up the Cast-in-place concrete base; 3, hypomere precast pile; 4, epimere steel pipe; 5, the following joint bar of hypomere precast pile; 6, the following joint bar of epimere steel pipe; 8, concrete; 9, the last joint bar of hypomere precast pile; 10, bury joint bar in advance; 11, radiation muscle, 12, firm muscle.

The specific embodiment

Embodiment of the present utility model is described in detail in conjunction with the accompanying drawings, but protection domain of the present utility model is not limit by embodiment.

Embodiment one

As shown in Figure 1 be the main TV structure schematic diagram of the utility model precast pile Cast-in-place concrete base, epimere is set to steel pipe 4, inside is provided with down joint bar 6 and concrete eight, be provided with the last joint bar 9 of hypomere precast pile in the hypomere precast pile 3 and bury joint bar 10 in advance, the last joint bar 9 of hypomere precast pile overlaps mutually with the following joint bar 6 of epimere steel pipe, by last Cast-in-place concrete base 2 epimere steel pipe 4 and hypomere precast pile 3 are fused again, the internal connection of epimere steel pipe 4 and hypomere precast pile 3 is provided with the firm muscle 12 of chiasma type, the lower end of hypomere precast pile 3 is provided with Cast-in-place concrete base 1, the center of Cast-in-place concrete base 2 and Cast-in-place concrete base 1 is coaxial with hypomere precast pile 3 and epimere steel pipe 4 centers, and the cross section of epimere steel pipe 4 and hypomere precast pile 3 is circular.The vertical section of last Cast-in-place concrete base 2 and Cast-in-place concrete base 1 is down big and little trapezoidally, is provided with radiation muscle 11 in the cast-in-situ base 1.The job practices of present embodiment can be constructed according to common process.

Claims (2)

1, a kind of suitable Tall Building Foundation construction high-bearing capacity expanded bore pile, it is characterized in that it is to be made of following structure: epimere is set to steel pipe, inside is provided with down joint bar (6) and concrete (8), be provided with the last joint bar (9) of hypomere precast pile in the hypomere precast pile (3) and bury joint bar (10) in advance, the last joint bar (9) of hypomere precast pile overlaps mutually with the following joint bar (6) of epimere steel pipe, by last Cast-in-place concrete base (2) epimere steel pipe (4) and hypomere precast pile (3) are fused again, the internal connection of epimere steel pipe (4) and hypomere precast pile (3) is provided with the firm muscle of chiasma type (12), the lower end of hypomere precast pile (3) is provided with Cast-in-place concrete base (1), the center of Cast-in-place concrete base (2) and Cast-in-place concrete base (1) is coaxial with hypomere precast pile (3) and epimere steel pipe (4) center, the cross section of epimere steel pipe (4) and hypomere precast pile (3) is circular, is provided with radiation muscle (11) in the cast-in-situ base (1).

2, the high-bearing capacity expanded bore pile use in suitable Tall Building Foundation construction according to claim 1, it is characterized in that described vertical section of going up Cast-in-place concrete base (2) and Cast-in-place concrete base (1) is greatly upward little down trapezoidal.