CN2388222Y - Reinforced concrete thin wall round eyed square pile - Google Patents

Abstract

The utility model relates to a reinforced concrete thin wall round eyed square pile which is applied to the pile foundations of the dwelling house with the multilayer frame structure, the small high-rise building and the industrial factory building in the civil engineering building. The square pile is a thin wall square pile with a small cross section. The external of the section shape presents a square, and the internal presents a circular hollow. The area of the circular hollow is 1/2 area of the square cross section, and the end of a sealing pile presents an integral planar structure. Utilizing different approaches to expand the pile bottom can cause the bearing capacity of the pile to be enhanced, and therefore, the damage on the surrounding buildings and the underground pipelines due to the fact that the soil is squeezed by pile sinking and the pollution on the surrounding environment due to the drilling mud can be avoided. Through the economic analysis contrast of the fabricating cost of the unit bearing capacity under the same geological condition, compared with various piles, the reinforced concrete thin wall round eyed square pile can save the engineering cost by 20%-60%.

Description

The circular hole side's stake of steel bar concrete thin-walled

The utility model relates to the steel bar concrete thin-walled circular hole side's stake in multistory frame structure dwelling house, small sized multiple story building and the industrial premises pile foundation of civil construction project.

The pile foundation of multistory frame structure dwelling house, small sized multiple story building and industrial premises, commonly used have steel bar concrete precast square pile, steel bar concrete pile for prestressed pipe, tube-sinking cast-in-situ pile, a bored pile etc.Steel bar concrete precast square pile and steel bar concrete pile for prestressed pipe have the advantage of reliable quality, but have the damage of soil compaction during pile driving to all buildings of neighbour and underground utilities, defectives such as construction costs height.The tube-sinking cast-in-situ pile construction costs is low, but exists soil compaction during pile driving not only to the damage of adjacent Zhou Jianzhu and underground utilities, and self pile quality existed has a strong impact on, the bearing capacity of single pile value is lower, the cushion cap area of stake is excessive, and the stake and the engineering quantity of cushion cap are increased, and construction costs improves.Bored pile is used in a small amount of engineering, though have the advantage of no soil compaction influence, has the defective of borehole wall-protection mud contamination environment, and concrete is built and influenced pile quality under water, the bearing capacity that sediment influences at the bottom of the stake hole, the construction costs height of pile foundation." the steel bar concrete heavy in section hollow square pile " of the patent No. 98244407.9 disclosed the technical scheme of circular hole side's stake, it is applicable to highrise building greatly because of bearing capacity, build the waste that just seems if be used in multilayer (below nine layers), and its stake end is split type with side's stake, the Eight characters or the outer Eight characters in structure is, need special processing, also will solve connectivity problem, construction costs is increased.

The purpose of this utility model all provides a kind of steel bar concrete thin-walled circular hole side's stake that is applicable to multistory building in the defective that overcomes prior art, can avoid soil compaction during pile driving to the pollution of the damage of all buildings of neighbour and underground utilities and drilling slurry to all environment of neighbour, can the bearing capacity of stake be improved by multinomial means again, reliable in quality, thereby and simplified structure reduction construction costs.

According to above-mentioned purpose, embodiment of the present utility model is: rounded hollow in steel bar concrete thin-walled circular hole side's stake cross sectional shape is square outward, and the circular hollow area is the square-section area half, and this side's stake is the stake of small bore thin-walled side, and it seals the stake end and is the monolithic plane structure.

The small bore thin wall construction is adopted in side's stake of the present utility model, make it be applicable to the pile foundation of multistory building, carry out batch production production by member factory, according to the geological conditions design bearing capacity, can not only avoid soil compaction during pile driving to the pollution of the damage of all buildings of neighbour and underground utilities and drilling slurry to all environment of neighbour, the stake end expansion end with different modes is improved the bearing capacity of stake, unit bearing capacity cost through identical geological conditions stake is analyzed contrast through squeezing, compare with same cross-sectional steel bar concrete precast square pile and can save 40%, compare with the steel bar concrete pile for prestressed pipe and can save 30%, compare with the basis comprehensive economic analysis of tube-sinking cast-in-situ pile and cushion cap and can save 20%, compare with bored pile and can save 60%.

To elaborate again to the utility model with reference to the accompanying drawings below.

Fig. 1 is the utility model pile figure.

Fig. 2 is the A-A sectional view of Fig. 1.

Fig. 3 is that 1 end of scheme expands end schematic diagram.

Fig. 4 is 2 artificial bearing stratum schematic diagrames of end of scheme.

Fig. 5 is 3 end soil of a scheme plug schematic diagram.

Fig. 6 is 4 end closure schematic diagrames of scheme.

Referring to Fig. 1-6, the cross sectional shape of steel bar concrete thin-walled circular hole side's stake is square outward rounded hollow (5) in (4), and the area of circular hollow is the square-section area half.According to design bearing capacity require to select stake smallest cross-sectional b * b=45 * 45 (centimetre), maximum cross-section b * b=50 * 50 (centimetre), corresponding circular hollow diameter d is 36 centimetres or 40 centimetres, the size table of contrast Fig. 2, table 1.

Because the stake end (3) that seals of this side's stake (1) is the monolithic plane structure, simplified split type stake end structure.

Upper end and the cushion cap connecting reinforcement of stake in the side the hollow bed die that hangs insert cage of reinforcement (2) and build concrete.The spreading of stake cooperates segmentation process for sinking and special-purpose soil sampler to fetch earth at the circular hole position with angle steel welding pile extension, reduces the damage to all buildings of neighbour and underground utilities.

For further improving end resistance, can reinforce bearing stratum at square stake stake end, by dry concrete (6) the expansion underseal mouth of scheme 1, in circular hole, ram the enlarged footing that forms by the dry concrete with weight, improve the end resistance of stake.

Scheme 2 is when the no pan soil bearing stratum of stake end or bearing stratum are very thin, promptly form bearing course at pile end with artificial method, seal owing to rigid concrete (6) again after forming artificial bearing stratum by discarded rubbish (7) earlier, discarded rubbish such as building waste, the brickbat tile fragment, whitewash mortar, industrial refuse, slag, slag, carbide slag or the like, mix the small amount of cement cementitious matter, all can make the material of artificial bearing stratum, in batches in input side's stake circular hole, ram in circular hole with weight and to extrude, press to periphery gradually and thicken, last hammering injection amount judges whether finish, and drops into the dry concrete after finishing in circular hole, and weight is rammed the back cover pile.

Scheme 3 directly adopts the construction of stake end opening static pressure or hammer piling under the situation of all environment permissions of neighbour, have in part weak soil (8) side of the being introduced into stake circular hole, slightly can reduce the soil compaction influence, when entering hardpan, the stake end enters pan soil (9) and forms the soil plug, is equivalent to the effect of entity side's stake.

Scheme 4 adopts the stake prefabricated shoe of end (10) to seal in the ward, and static pressure or hammer piling construction enter the degree of depth pile of designing requirement.

Claims (6)

1. steel bar concrete thin-walled circular hole side's stake, this side stake (1) cross sectional shape be square outward rounded hollow (5) in (4), and the circular hollow area is the square-section area half, it is characterized in that described side's stake is the stake of small bore thin-walled side, and it seals stake end (3) and is the monolithic plane structure.

2. steel bar concrete thin-walled circular hole side's stake as claimed in claim 1, the specification that it is characterized in that described small bore thin-walled side's stake (1) be b * b=45 * 45 (centimetre) or b * b=50 * 50 (centimetre), corresponding circular hollow diameter d is 36 centimetres or 40 centimetres.

3. steel bar concrete thin-walled circular hole side's stake as claimed in claim 1 or 2 is characterized in that this side's stake stake end (3) expands the end and sealed by dry concrete (6).

4. steel bar concrete thin-walled circular hole side's stake as claimed in claim 1 or 2 is characterized in that this side's stake stake end (3) expands the end and sealed by discarded rubbish (7) and dry concrete (6).

5. steel bar concrete thin-walled circular hole side's stake as claimed in claim 1 or 2 is characterized in that this side's stake stake end (3) expansion end forms the soil plug by weak soil (8) and pan soil (9) and seals.

6. steel bar concrete thin-walled circular hole side's stake as claimed in claim 1 or 2 is characterized in that this side's stake stake end (3) is sealed by prefabricated shoe (10).

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