CN212026239U - Stiffness composite pile capable of improving bearing capacity - Google Patents
Stiffness composite pile capable of improving bearing capacity Download PDFInfo
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- CN212026239U CN212026239U CN202020532617.9U CN202020532617U CN212026239U CN 212026239 U CN212026239 U CN 212026239U CN 202020532617 U CN202020532617 U CN 202020532617U CN 212026239 U CN212026239 U CN 212026239U
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Abstract
The utility model discloses a stiff composite pile capable of improving bearing capacity, belonging to the technical engineering field of pile foundation, comprising a stirring solidification body, a special-shaped pipe pile, a steel sleeve, a bulge and a sealing bottom plate; the special-shaped tubular pile is composed of a plurality of sections, the adjacent special-shaped tubular piles are connected in a welded mode, the special-shaped tubular piles are connected with a stirring curing body through cementation, the outer side faces of the special-shaped tubular piles are prefabricated to be protruding, the lower end of the lower section of the special-shaped tubular pile is welded with a sealing plate, the inner side faces of the special-shaped tubular piles are bonded with a steel sleeve, a cylindrical concrete solid structure can be cemented inside the steel sleeve, the special-shaped tubular piles are of a round concrete structure, the maximum length of the horizontal section of the special-shaped tubular pile is 200-2000 mm, and the protruding height and the protruding. The utility model discloses, the tubular pile is add the bamboo joint form arch, and protruding height and width change along with the increase of degree of depth to set up the steel casing pipe on the inner tube of the stirring solidification body, improved the holistic intensity of strength nature composite pile.
Description
Technical Field
The utility model relates to a pile foundation technical engineering field, in particular to can improve strength nature composite pile type of bearing capacity.
Background
In the existing engineering foundation design, the same pile type, the same material, the same section and length and the same construction method are generally adopted when the same engineering foundation is designed. In fact, the additional stress has gradient change from shallow to deep: the additional stress at the shallow part is large, the additional stress at the deep part is small, and the additional stress of the pile type with larger proportion of the friction force to the total bearing force is more quickly attenuated from top to bottom, namely the stress gradient is larger. For a typical friction pile, a stiff composite pile, the additional stress gradient is large, and the stress is mainly concentrated on the upper part of the pile body. If the stiff composite pile is arranged according to the traditional equal-length design, the problems that the pile body is deformed and damaged due to overlarge upper stress and insufficient strength and the pile body is wasted due to undersized lower stress exist. The bearing capacity of all short piles is met but the settlement requirement is not met, and all long piles are used for settlement but the bearing capacity safety coefficient is too high, so that waste is caused, and excessive negative soil squeezing effect can be generated in construction.
The pure pile foundation cannot work together due to the large difference of rigidity and strength between the pile and the soil, so the working performance of the soil is not considered during design. For the pile type of the stiff composite pile with gradually changed rigidity and strength from inside to outside, pile soil can play a bearing role together, and at the moment, the problem of insufficient bearing capacity of natural foundation soil exists and the stiff composite pile needs to be treated by a composite foundation method. The problem that the actual stress distribution of piles, soil and vertical reinforcements in the foundation is different from a theoretical calculation result exists after the treatment. The stress of the foundation is related to the superstructure, and as the building is more and more complicated, the height change is larger and larger, and the stress distribution and the stress transmission path of the foundation are more and more complicated. If the pile type, the pile length or the pile diameter are not adjusted according to the traditional design method, the problems that the bearing capacity of certain key parts is difficult to ensure and the settlement is overlarge or uneven exist. Therefore, the utility model provides a strength nature composite pile type that can improve bearing capacity.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned technical problem who exists among the prior art, the utility model provides a can improve strength nature composite pile type of bearing capacity has overcome the not enough of prior art. The bamboo-like bulges are additionally arranged on the pipe pile, so that the height and the width of the bulges can be changed along with the increase of the depth, the aim of cooperatively stressing the pipe pile and the cement-soil pile is fulfilled, the additional stress on the upper part can be effectively borne, and the material cost is reduced under the condition of ensuring the structural stability; the steel sleeve is arranged on the inner pipe of the stirring solidification body, and meanwhile, cylindrical concrete solid structures with different lengths are inserted into the steel sleeve, so that the overall strength of the stiff composite pile is improved.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a stiff composite pile capable of improving bearing capacity is characterized by comprising a stirring solidification body, a special-shaped pipe pile, a steel sleeve, a bulge and a bottom sealing plate 8; the dysmorphism tubular pile comprises the multisection, adopt welded mode to connect between the adjacent dysmorphism tubular pile, the dysmorphism tubular pile links together through the cementation with the stirring solidification body, the lateral surface prefabricated of dysmorphism tubular pile has the arch, the lower extreme welding of a lower part section dysmorphism tubular pile has the back cover board, the medial surface and the steel casing bonding of dysmorphism tubular pile, the cylindrical concrete solid structure of steel casing inside can the cementation, the dysmorphism tubular pile is round cast concrete structure, the horizontal cross section maximum length of dysmorphism tubular pile is L, L's scope is 200mm-2000mm, protruding height is 0~30% L, protruding width is 0~100% L, protruding interval is 0.5~3.0m, protruding height, protruding width change along with the increase of degree of depth.
Preferably, the length range of each special-shaped tubular pile is 5 m-20 m, the stirring solidification body is cylindrical, and the diameter of the stirring solidification body is 1.0L-2.0L.
Preferably, the steel sleeve is a circular tube type, the thickness of the steel sleeve is 5 mm-15 mm, and the length of the steel sleeve is 0-20 m.
Preferably, the height and the width of the protrusion gradually decrease with the increase of the depth, and at the position of the pile top of the stiff composite pile, the height of the protrusion is 20% -30% L, and the width of the protrusion is 30% -100% L.
Preferably, the diameter of the cross section of the cylindrical concrete solid structure is smaller than the inner diameter of the steel sleeve by 1 cm-2 cm.
Preferably, one end of the special-shaped pipe pile, which is located at the pile bottom of the whole stiff composite pile, is sealed by a pile tip.
Preferably, the protrusion is a bamboo joint type annular protrusion, and a steel reinforcement framework is arranged inside the protrusion.
Preferably, the back cover plate is made of cast iron, the diameter of the back cover plate is the same as that of the steel sleeve, two circular holes are reserved in the back cover plate, the diameter of each hole is 3 cm-5 cm, two rib plates perpendicular to each other are welded on the back cover plate, the intersection line of the two rib plates is parallel to the normal direction of the back cover plate, each rib plate is a square plate, and the side length of each rib plate is the same as the diameter of the back cover plate.
The utility model discloses the beneficial technological effect who brings:
(1) the bamboo-like bulges are additionally arranged on the pipe pile, so that the height and the width of the bulges can be changed along with the increase of the depth, the aim of cooperatively stressing the pipe pile and the cement-soil pile is fulfilled, the additional stress on the upper part can be effectively borne, and the material cost is reduced under the condition of ensuring the structural stability; (2) the steel sleeve is arranged on the inner pipe of the stirring solidification body, and meanwhile, cylindrical concrete solid structures with different lengths are inserted into the steel sleeve, so that the overall strength of the stiff composite pile is improved.
Drawings
Fig. 1 is a schematic view of the section of a stiff composite pile type capable of improving bearing capacity.
Fig. 2 is the utility model relates to a local structure schematic diagram of abnormal shape tubular pile in strength nature composite pile type that can improve bearing capacity.
Fig. 3 is a top view of the stiff composite pile type middle sealing bottom plate of the present invention capable of improving bearing capacity.
Wherein, 1-stirring the solidified body; 2-special-shaped tubular piles; 3-projection; 4-steel casing pipe; 5-bump height; 6-bulge width; 7-bump pitch; 8-sealing the bottom plate.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments:
example 1:
as shown in fig. 1 to 3, a stiff composite pile capable of improving bearing capacity is characterized by comprising a stirring solidification body 1, a special-shaped tubular pile 2, a steel sleeve 4, a protrusion 3 and a sealing bottom plate 8; dysmorphism tubular pile 2 is constituteed for the multisection, adopts the welded mode to connect between the adjacent special-shaped tubular pile 2, special-shaped tubular pile 2 links together through the cementation with stirring solidification body 1, and special-shaped tubular pile 2's lateral surface prefabricated has protruding 3, and the lower extreme welding of a lower part section special-shaped tubular pile 2 has a back cover board 8, and special-shaped tubular pile 2's medial surface and steel casing 4 bond, the inside cylindrical concrete entity structure that can consolidate of steel casing 4, special-shaped tubular pile 2 are pipe type concrete structure, and special-shaped tubular pile 2's horizontal cross-section maximum length L is 800mm, protruding height 5 is 0~30% L, and protruding width is 60~100% L, and protruding interval 7 is 1.0m, protruding height 5, protruding width 6 change along with the increase of degree of depth.
Preferably, the length range of each special-shaped tubular pile 2 is 10m, the stirring solidification body 1 is cylindrical, and the diameter of the stirring solidification body 1 is 1000 mm.
Preferably, the steel sleeve 4 is a circular tube type, the thickness of the steel sleeve 4 is 10mm, and the length of the steel sleeve 4 is 10 m.
Preferably, the height 5 and the width 6 of the protrusion gradually decrease with increasing depth, and at the position of the pile top of the stiff composite pile, the height 5 of the protrusion is 200mm, and the width 6 of the protrusion is 300 mm.
Preferably, the diameter of the cross section of the cylindrical concrete solid structure is less than 2cm of the inner diameter of the steel sleeve 4.
Preferably, one end of the special-shaped tubular pile 2, which is located at the pile bottom of the whole stiff composite pile, is subjected to bottom sealing by adopting a pile tip.
Preferably, the protrusion 3 is a bamboo joint type annular protrusion 3, and a steel reinforcement framework is arranged inside the protrusion 3.
Preferably, the bottom sealing plate 8 is made of cast iron, the diameter of the bottom sealing plate 8 is the same as that of the steel sleeve 4, two circular holes are reserved in the bottom sealing plate 8, the diameter of each hole is 5cm, two rib plates perpendicular to each other are welded on the bottom sealing plate 8, the intersection line of the two rib plates is parallel to the normal direction of the bottom sealing plate 8, each rib plate is a square plate, and the side length of each rib plate is the same as the diameter of the bottom sealing plate.
Example 2:
as shown in fig. 1 to 3, a stiff composite pile capable of improving bearing capacity is characterized by comprising a stirring solidification body 1, a special-shaped tubular pile 2, a steel sleeve 4, a protrusion 3 and a sealing bottom plate 8; dysmorphism tubular pile 2 is constituteed for the multisection, adopt welded mode to connect between the adjacent dysmorphism tubular pile 2, dysmorphism tubular pile 2 links together through the cementation with stirring solidification body 1, the lateral surface prefabrication of dysmorphism tubular pile 2 has protruding 3, the lower extreme welding of a lower part section dysmorphism tubular pile 2 has a back cover board 8, the medial surface and the steel casing 4 bonding of special-shaped tubular pile 2, the inside cylindrical concrete entity structure that can consolidate of steel casing 4, special-shaped tubular pile 2 is tubular concrete structure, the horizontal cross-section maximum length L of special-shaped tubular pile 2 is 1000mm, protruding height 5 is 0~30% L, protruding width is 60~100% L, protruding interval 7 is 1.0m, protruding height 5, protruding width 6 change along with the increase of degree of depth.
Preferably, the length range of each special-shaped tubular pile 2 is 15m, the stirring solidification body 1 is cylindrical, and the diameter of the stirring solidification body 1 is 1300 mm.
Preferably, the steel sleeve 4 is a circular tube type, the thickness of the steel sleeve 4 is 10mm, and the length of the steel sleeve 4 is 15 m.
Preferably, the height 5 and the width 6 of the protrusion gradually decrease with increasing depth, and at the position of the pile top of the stiff composite pile, the height 5 of the protrusion is 250mm, and the width of the protrusion is 500 mm.
Preferably, one end of the special-shaped tubular pile 2, which is located at the pile bottom of the whole stiff composite pile, is subjected to bottom sealing by adopting a pile tip.
Preferably, the protrusion 3 is a bamboo joint type annular protrusion 3, and a steel reinforcement framework is arranged inside the protrusion 3.
Preferably, the bottom sealing plate 8 is made of cast iron, the diameter of the bottom sealing plate 8 is the same as that of the steel sleeve 4, two circular holes are reserved in the bottom sealing plate 8, the diameter of each hole is 5cm, two rib plates perpendicular to each other are welded on the bottom sealing plate 8, the intersection line of the two rib plates is parallel to the normal direction of the bottom sealing plate 8, each rib plate is a square plate, and the side length of each rib plate is the same as the diameter of the bottom sealing plate.
The utility model relates to a strength nature composite pile type that can improve bearing capacity, through add bamboo joint form arch to the tubular pile, protruding height and width can change along with the increase of degree of depth, have reached the purpose of tubular pile and cement soil pile atress in coordination, make the upper portion additional stress effectively undertake, reduce material cost under the condition of guaranteeing structural stability; the steel sleeve is arranged on the inner pipe of the stirring solidification body, and meanwhile, cylindrical concrete solid structures with different lengths are inserted into the steel sleeve, so that the overall strength of the stiff composite pile is improved.
Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and the changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention also belong to the protection scope of the present invention.
Claims (8)
1. A stiff composite pile capable of improving bearing capacity is characterized by comprising a stirring solidification body, a special-shaped pipe pile, a steel sleeve, a bulge and a bottom sealing plate; the dysmorphism tubular pile comprises the multisection, adopt welded mode to connect between the adjacent dysmorphism tubular pile, the dysmorphism tubular pile links together through the cementation with the stirring solidification body, the lateral surface prefabricated of dysmorphism tubular pile has the arch, the lower extreme welding of a lower part section dysmorphism tubular pile has the back cover board, the medial surface and the steel casing bonding of dysmorphism tubular pile, the cylindrical concrete solid structure of steel casing inside can the cementation, the dysmorphism tubular pile is round cast concrete structure, the horizontal cross section maximum length of dysmorphism tubular pile is L, L's scope is 200mm-2000mm, protruding height is 0~30% L, protruding width is 0~100% L, protruding interval is 0.5~3.0m, protruding height, protruding width change along with the increase of degree of depth.
2. A stiff composite pile form capable of improving bearing capacity according to claim 1, wherein the length of each special-shaped tubular pile ranges from 5m to 20m, the stirring solidification body is cylindrical, and the diameter of the stirring solidification body ranges from 1.0L to 2.0L.
3. A stiff composite pile profile capable of improving bearing capacity according to claim 1, wherein the steel sleeve is a circular tube type, the thickness of the steel sleeve is 5mm to 15mm, and the length of the steel sleeve is 0 to 20 m.
4. A stiff composite pile shape capable of improving bearing capacity according to claim 1, wherein the height and width of the protrusions gradually decrease with increasing depth, and at the position of the pile top of the stiff composite pile, the height and width of the protrusions are 20% L-30% L and 30% L-100% L, respectively.
5. A stiff composite pile form capable of improving bearing capacity according to claim 1, characterized in that the diameter of the cross section of the cylindrical concrete solid structure is 1cm to 2cm smaller than the inner diameter of the steel casing.
6. The stiff composite pile capable of improving the bearing capacity of claim 1, wherein one end of the special-shaped pipe pile at the bottom of the whole stiff composite pile is capped by a pile tip.
7. A stiff composite pile type capable of improving bearing capacity according to claim 1, wherein the protrusions are bamboo joint type annular protrusions, and a steel reinforcement framework is arranged inside the protrusions.
8. A stiff composite pile capable of improving bearing capacity as claimed in claim 1, wherein the back cover plate is made of cast iron, the diameter of the back cover plate is the same as that of the steel sleeve, two circular holes are reserved in the back cover plate, the diameter of each circular hole is 3 cm-5 cm, two rib plates perpendicular to each other are welded on the back cover plate, the intersection line of the two rib plates is parallel to the normal direction of the back cover plate, each rib plate is a square plate, and the side length of each rib plate is the same as the diameter of the back cover plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020532617.9U CN212026239U (en) | 2020-04-13 | 2020-04-13 | Stiffness composite pile capable of improving bearing capacity |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020532617.9U CN212026239U (en) | 2020-04-13 | 2020-04-13 | Stiffness composite pile capable of improving bearing capacity |
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| Publication Number | Publication Date |
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| CN212026239U true CN212026239U (en) | 2020-11-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020532617.9U Active CN212026239U (en) | 2020-04-13 | 2020-04-13 | Stiffness composite pile capable of improving bearing capacity |
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