CN212077917U

CN212077917U - Stiff composite pile type capable of fully exerting characteristics of solidified soil

Info

Publication number: CN212077917U
Application number: CN202020532550.9U
Authority: CN
Inventors: 宋伟杰; 朱庆凯; 李建平; 王伟涛; 刘光磊; 武思宇; 刘兴华
Original assignee: Zhongyan Technology Co Ltd
Current assignee: Zhongyan Technology Co Ltd
Priority date: 2020-04-13
Filing date: 2020-04-13
Publication date: 2020-12-04
Anticipated expiration: 2030-04-13

Abstract

The utility model discloses a stiff composite pile type which gives full play to the characteristics of solidified soil, belonging to the technical engineering field of pile foundation, comprising a solidified soil pile, a tubular pile, a convex structure and a pile tip, wherein the tubular pile consists of a plurality of sections; the adjacent tubular piles are connected in a welding mode, the tubular piles are connected with the solidified soil piles in a bonding mode, a protruding structure is prefabricated on the surface of each tubular pile, and the lower end of the section of the tubular pile at the lowest part is connected with a pile tip; the outside diameter of solidification soil pile is 300mm ~2000mm, the inside diameter of solidification soil pile is 200mm ~1500mm, the wall thickness of solidification soil pile is 50mm ~500mm, the intensity of upper portion tubular pile is not less than the intensity of lower part tubular pile, the wall thickness of upper portion tubular pile is not less than the wall thickness of lower part tubular pile, the diameter of upper portion tubular pile is not less than the diameter of lower part tubular pile, the surface area of protruding structure accounts for corresponding tubular pile area of one side 0~ 30%. The utility model discloses increase the interface frictional resistance between tubular pile and the soil cement stirring stake, reached the purpose of tubular pile and the soil cement stake atress in coordination.

Description

Stiff composite pile type capable of fully exerting characteristics of solidified soil

Technical Field

The utility model relates to a pile foundation technical engineering field, in particular to strength nature composite pile type of full play solidification soil characteristic.

Background

The stiff composite pile is a new composite pile type which is stressed together by inserting the core pile into the cement-soil mixing pile before the initial setting of the cement-soil mixing pile. 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, and the stress is mainly concentrated at the upper part of the pile body. If the construction is carried out according to the traditional cement soil mixing pile, the upper part stress is overlarge, so that the deformation and the damage are generated between the tubular pile and the cement soil.

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 the rigidity and the strength gradually changed from inside to outside, the pile soil can play a bearing role together, and the problem of insufficient bearing capacity of natural foundation soil exists at the moment. If the pile type, the pile length, the pile diameter or the solidified material is not adjusted according to the traditional design method, the problem of excessive or uneven settlement is easy to occur. Therefore, the utility model provides a strength nature composite pile type of full play solidification soil characteristic.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned technical problem that exists among the prior art, the utility model provides a strength nature composite pile type of full play solidification soil characteristic has overcome the not enough of prior art. Through changing intensity, wall thickness and the diameter of tubular pile in the different degree of depth department to add mound form uplift on the surface of tubular pile, thereby redistributed the self structural strength of tubular pile, increased the interface frictional resistance between tubular pile and the soil cement stirring stake, reached the purpose of tubular pile and soil cement stake atress in coordination, made the upper portion additional stress effectively undertake.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a stiff composite pile type giving full play to the characteristics of solidified soil is characterized by comprising a solidified soil pile, a tubular pile, a protruding structure and a pile tip, wherein the tubular pile consists of a plurality of sections; the adjacent tubular piles are connected in a welding mode, the tubular piles are connected with the solidified soil piles in a bonding mode, a protruding structure is prefabricated on the surface of each tubular pile, and the lower end of the section of the tubular pile at the lowest part is connected with a pile tip; the solidified soil pile is of a circular tube type structure, the outer diameter of the solidified soil pile is 300 mm-2000 mm, the inner diameter of the solidified soil pile is 200 mm-1500 mm, and the wall thickness of the solidified soil pile is 50 mm-500 mm; the strength of upper portion tubular pile is not less than the strength of lower part tubular pile, and the intensity scope of tubular pile is 50MPa ~150MPa, and the wall thickness of upper portion tubular pile is not less than the wall thickness of lower part tubular pile, and the wall thickness scope of tubular pile is 50mm ~400mm, and the diameter of upper portion tubular pile is not less than the diameter of lower part tubular pile, and the diameter scope of tubular pile is 200mm ~1500mm, and the surface area of protruding structure accounts for corresponding tubular pile area 0~ 30%.

Preferably, the number of the protruding structures is gradually reduced along with the increase of the depth, the height of the protruding structures is gradually reduced along with the increase of the depth, the protruding structures are hemispherical bulges, the height range of the protruding structures is 0-50 mm, the surface area of the protruding structures of the top tubular pile accounts for 20-30% of the side area of the section of tubular pile, and the surface area of the protruding structures of the bottom tubular pile accounts for 0-5% of the side area of the section of tubular pile.

Preferably, the stake point is hemisphere concrete structure, and stake point and tubular pile form a whole through prefabricating, and circular hole is reserved to the stake point, and the diameter of hole is 5cm ~15 cm.

Preferably, the wall thickness of each adjacent tube stake decreases in a gradient of 10cm with increasing depth.

Preferably, the tubular pile is of a hollow round tube type or a hollow square tube type.

The utility model discloses the beneficial technological effect who brings:

through the intensity that changes the tubular pile in the different degree of depth department to add mound form uplift on the surface of tubular pile, thereby redistributed the self structural strength of tubular pile, increased the interface frictional resistance between tubular pile and the soil cement stirring stake, reached the purpose of tubular pile and soil cement stake atress in coordination, made the upper portion additional stress effectively undertake.

Drawings

Fig. 1 is a schematic diagram of the sectioning of a stiff composite pile type which fully exerts the characteristics of the solidified soil of the utility model.

Wherein, 1-solidifying soil piles; 2-pipe pile; 3-a raised structure; 4-pile tip.

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, a stiff composite pile shape which fully exerts the characteristics of solidified soil is characterized by comprising a solidified soil pile 1, a tubular pile 2, a protruding structure 3 and a pile tip 4, wherein the tubular pile 2 is composed of a plurality of sections; the adjacent tubular piles 2 are connected in a welding mode, the tubular piles 2 are connected with the solidified soil piles 1 in a bonding mode, the surfaces of the tubular piles 2 are prefabricated with protruding structures 3, and the lower end parts of the sections of the tubular piles 2 at the lowest part are connected with pile tips 4; the solidified soil pile 1 is of a circular tube type structure, the outer diameter of the solidified soil pile 1 is 300 mm-2000 mm, the inner diameter of the solidified soil pile 1 is 200 mm-1500 mm, and the wall thickness of the solidified soil pile 1 is 50 mm-500 mm; the strength of upper portion tubular pile 2 is not less than the strength of lower part tubular pile 2, the intensity scope of tubular pile 2 is 50MPa ~150MPa, the wall thickness of upper portion tubular pile 2 is not less than the wall thickness of lower part tubular pile 2, the wall thickness scope of tubular pile 2 is 50mm ~400mm, the diameter of upper portion tubular pile 2 is not less than the diameter of lower part tubular pile 2, the diameter scope of tubular pile 2 is 200mm ~1500mm, the surface area of protruding structure 3 accounts for corresponding 0~30% of tubular pile 2 side area.

Preferably, the quantity of protruding structure 3 reduces gradually along with the increase of the degree of depth, and the height of protruding structure 3 reduces gradually along with the increase of the degree of depth, protruding structure 3 is hemispherical uplift, and the high scope of protruding structure 3 is 0mm ~50mm, and the surface area of the protruding structure 3 of top tubular pile 2 accounts for 30% of this section tubular pile 2 side area, and the surface area of the protruding structure 3 of bottom tubular pile 2 accounts for 5% of this section tubular pile 2 side area.

Preferably, stake point 4 is hemisphere concrete structure, and stake point 4 forms a whole through prefabricating with tubular pile 2, and circular hole is reserved to stake point 4, and the diameter of hole is 10 cm.

Preferably, the wall thickness of each adjacent tube stake 2 decreases with a gradient of 10cm as the depth increases.

Preferably, the tubular pile 2 has a hollow circular tube structure.

Example 2:

as shown in fig. 1, a stiff composite pile shape which fully exerts the characteristics of solidified soil is characterized by comprising a solidified soil pile 1, a tubular pile 2, a protruding structure 3 and a pile tip 4, wherein the tubular pile 2 is composed of a plurality of sections; the adjacent tubular piles 2 are connected in a welding mode, the tubular piles 2 are connected with the solidified soil piles 1 in a bonding mode, the surfaces of the tubular piles 2 are prefabricated with protruding structures 3, and the lower end parts of the sections of the tubular piles 2 at the lowest part are connected with pile tips 4; the solidified soil pile 1 is of a circular tube type structure, the outer diameter of the solidified soil pile 1 is 300 mm-2000 mm, the inner diameter of the solidified soil pile 1 is 200 mm-1500 mm, and the wall thickness of the solidified soil pile 1 is 50 mm-500 mm; the intensity of upper portion tubular pile 2 is not less than the intensity of lower part tubular pile 2, and the intensity scope of tubular pile 2 is 50MPa ~150MPa, and the wall thickness of upper portion tubular pile 2 is not less than the wall thickness of lower part tubular pile 2, and the wall thickness scope of tubular pile 2 is 50mm ~400mm, and the diameter of upper portion tubular pile 2 is not less than the diameter of lower part tubular pile 2, and the diameter scope of tubular pile 2 is 200mm ~1500mm, and the surface area of protruding structure 3 accounts for corresponding 0~30% of tubular pile 2 side area.

Preferably, the quantity of protruding structure 3 reduces gradually along with the increase of the degree of depth, and the height of protruding structure 3 reduces gradually along with the increase of the degree of depth, protruding structure 3 is hemispherical uplift, and the high scope of protruding structure 3 is 0mm ~50mm, and the surface area of the protruding structure 3 of top tubular pile 2 accounts for 25% of this section tubular pile 2 side area, and the surface area of the protruding structure 3 of bottom tubular pile 2 accounts for 3% of this section tubular pile 2 side area.

Preferably, stake point 4 is hemisphere concrete structure, and stake point 4 forms a whole through prefabricating with tubular pile 2, and circular hole is reserved to stake point 4, and the diameter of hole is 7 cm.

Preferably, the tubular pile 2 is of a hollow square tube type.

The utility model relates to a compound stake type of strength nature of full play solidification soil characteristic is through the intensity that changes the tubular pile in different degree of depth department to add mound form uplift on the surface of tubular pile, thereby redistributed the self structural strength of tubular pile, increased the interface frictional resistance between tubular pile and the cement soil mixing pile, reached the purpose of tubular pile and the cooperation atress of cement soil pile, make upper portion additional stress effectively undertake.

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

1. A stiff composite pile type giving full play to the characteristics of solidified soil is characterized by comprising a solidified soil pile, a tubular pile, a protruding structure and a pile tip, wherein the tubular pile consists of a plurality of sections; the adjacent tubular piles are connected in a welding mode, the tubular piles are connected with the solidified soil piles in a bonding mode, a protruding structure is prefabricated on the surface of each tubular pile, and the lower end of the section of the tubular pile at the lowest part is connected with a pile tip; the solidified soil pile is of a circular tube type structure, the outer diameter of the solidified soil pile is 300 mm-2000 mm, the inner diameter of the solidified soil pile is 200 mm-1500 mm, and the wall thickness of the solidified soil pile is 50 mm-500 mm; the strength of upper portion tubular pile is not less than the strength of lower part tubular pile, and the intensity scope of tubular pile is 50MPa ~150MPa, and the wall thickness of upper portion tubular pile is not less than the wall thickness of lower part tubular pile, and the wall thickness scope of tubular pile is 50mm ~400mm, and the diameter of upper portion tubular pile is not less than the diameter of lower part tubular pile, and the diameter scope of tubular pile is 200mm ~1500mm, and the surface area of protruding structure accounts for corresponding tubular pile area 0~ 30%.

2. The stiff composite pile according to claim 1, wherein the number of the protruding structures is gradually reduced with increasing depth, the height of the protruding structures is gradually reduced with increasing depth, the protruding structures are hemispherical bulges, the height range of the protruding structures is 0-50 mm, the surface area of the protruding structures of the top tubular pile accounts for 20-30% of the pile side area of the section of tubular pile, and the surface area of the protruding structures of the bottom tubular pile accounts for 0-5% of the pile side area of the section of tubular pile.

3. A stiff composite pile form giving full play to solidified soil characteristic of claim 1, characterized in that, the pile tip is a hemisphere concrete structure, the pile tip and the tubular pile form a whole through prefabrication, the pile tip reserves circular hole, the diameter of hole is 5cm ~15 cm.

4. A stiff composite pile form giving full play to the characteristics of solidified soil according to claim 1, characterized in that the wall thickness of each adjacent tubular pile decreases with a gradient of 10cm as the depth increases.

5. A stiff composite pile shape fully exerting the characteristics of solidified soil according to claim 1, characterized in that the structure of the pipe pile is a hollow round pipe type or a hollow square pipe type.