Cement-soil mixing pile composite foundation for reinforcement

Abstract

The utility model discloses a cement-soil mixing pile composite foundation for reinforcement, relates to the technical field of cement-soil mixing pile composite foundations, and aims to solve the problems that an existing cement-soil mixing pile composite foundation depends on single cement pouring, is single in structural layer, is easy to damage due to stress, and is low in safety and short in service life. The soft soil foundation is internally provided with a plurality of mixing pile forming grooves, the mixing pile forming grooves are internally provided with a plurality of cement soil mixing piles, and the mixing pile forming grooves are internally provided with a plurality of cement soil mixing piles; the cement shell is arranged in the cement soil mixing pile, a hollow cement column is arranged in the cement shell, a hollow cavity is formed in the hollow cement column, the hollow cavity and the hollow cement column are of an integrated structure, and a ground cage is arranged in the hollow cavity; the reinforcing outer ring is arranged on the outer wall of the hollow cement column, and the reinforcing outer ring and the hollow cement column are integrally formed in a pouring mode.

Description

Technical Field

[0001] The utility model relates to the technical field of cement-soil mixing pile composite foundations, in particular to a cement-soil mixing pile composite foundation for reinforcement. Background Art

[0002] Cement-soil mixing piles are a method used to reinforce saturated soft clay foundations. They use cement as a curing agent and forcefully mix the soft soil and curing agent deep in the foundation through a special mixing machine. A series of physical and chemical reactions between the curing agent and the soft soil are used to harden the soft soil into a high-quality foundation with integrity, water stability and a certain strength.

[0003] For example, the Chinese authorized patent with announcement number CN209958345U (a cement-soil mixing pile composite foundation for bank protection reinforcement) includes a soft soil foundation, a uniaxial cement-soil mixing pile, a triaxial cement-soil mixing pile, etc. The location where the composite foundation is to be formed in the soft soil foundation is excavated at a slope of 1:2.5, a number of uniaxial cement-soil mixing piles and a number of triaxial cement-soil mixing piles are arranged in the soft soil foundation, and a graded crushed stone cushion layer is laid on the top of the slope of the composite foundation. The top surface of the crushed stone cushion layer is paved with blocks, the top surface of the blocks is paved with two stone cushion layers, the top surface of the two stone cushion layers is provided with a retaining wall, two stones are paved behind the retaining wall, the top surface of the two stones is an inverted filter layer, the top surface of the inverted filter layer is paved with medium-coarse sand, the top surface of the medium-coarse sand is paved with a road structure, a mixed crushed stone inverted filter layer is paved on the slope surface of the composite foundation, two stone cushion layers are paved on the top surface of the mixed crushed stone inverted filter layer, the top surface of the two stone cushion layers is paved with face protection blocks, and the slope foot of the composite foundation is paved with foot protection blocks. The utility model can improve the shear strength of the composite foundation and has a good reinforcement effect.

[0004] However, the existing cement-soil mixing pile composite foundation relies on a single cement pouring, has a single structural layer, is easily damaged by force, and results in low safety and service life; therefore, it does not meet the existing needs. In this regard, we propose a cement-soil mixing pile composite foundation for reinforcement. Utility Model Content

[0005] The purpose of the utility model is to provide a cement-soil mixing pile composite foundation for reinforcement, so as to solve the problems proposed in the above background technology that the existing cement-soil mixing pile composite foundation relies on single cement pouring, has a single structural layer, is easily damaged by force, and leads to low safety and service life.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a cement-soil mixing pile composite foundation for reinforcement, comprising: a soft soil foundation, a mixing pile forming groove is arranged inside the soft soil foundation, and a plurality of mixing pile forming grooves are arranged, and a cement-soil mixing pile is arranged inside the mixing pile forming groove, and a plurality of cement-soil mixing piles are arranged;

[0007] Also includes:

[0008] A cement shell is arranged inside the cement soil mixing pile, a hollow cement column is arranged inside the cement shell, a hollow cavity is arranged inside the hollow cement column, and the hollow cavity and the hollow cement column are an integrated structure, and a ground cage is arranged inside the hollow cavity;

[0009] The reinforcing outer ring is arranged on the outer wall of the hollow cement column, and the reinforcing outer ring and the hollow cement column are integrally cast and formed, and a plurality of the reinforcing outer rings are arranged.

[0010] Preferably, a cement filler is provided between the ground cage and the hollow cement column, and the cement filler fills the gap between the hollow cavity and the ground cage.

[0011] Preferably, the outer wall of the ground cage is provided with a limiting outer ring, and the limiting outer ring is welded and fixed to the ground cage, and a plurality of the limiting outer rings are provided.

[0012] Preferably, a cage base is provided at the lower end of the cage, and the cage base is welded and fixed to the cage.

[0013] Preferably, a crushed stone layer is provided on the upper end of the soft soil foundation, and a ground roadbed is provided on the upper end of the crushed stone layer.

[0014] Preferably, a medium-coarse sand cushion layer is provided inside the ground roadbed, a geogrid layer is provided on the upper end of the medium-coarse sand cushion layer, a cushion layer is provided on the upper end of the geogrid layer, and a roadbed filling layer is provided on the upper end of the cushion layer.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The utility model divides the cement-soil mixing pile into a cement shell, a hollow cement column, a ground cage and a cement filler, and inserts the hollow cement column into the cement shell. Since the outer wall of the hollow cement column has a reinforced outer ring, the reinforced outer ring is inserted into the hardened cement shell, thereby improving the connection stability and firmness between the cement shell and the hollow cement column, exerting force on each other, not easily separated and damaged, and improving the service life. Then the ground cage is inserted into the hollow cement column, and the gap between the hollow cavity and the ground cage is filled with cement filler. The cement-soil mixing pile is composed of a multi-layer structure. Compared with a single cement casting, it has improved bearing capacity, is not easy to break, crack or damage, and improves service life and safety.

[0017] 2. By welding multiple limiting outer rings on the outer wall of the cage, the cage is inserted into the hollow cement column, and the gap between the hollow cavity and the cage is filled with cement filler. The limiting outer ring of the outer wall of the cage is inserted into the hardened cement filler to improve the firmness of the cage and further improve the overall stability and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the internal cross-sectional structure of the soft soil foundation of the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the cement soil mixing pile of the utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the ground cage of the utility model;

[0022] Figure 5 This is a schematic diagram of the structure of a hollow cement column of the utility model;

[0023] In the figure: 1. soft soil foundation; 2. gravel layer; 3. cement soil mixing pile; 4. mixing pile forming trough; 5. cement shell; 6. hollow cement column; 7. ground cage; 8. cement filler; 9. limiting outer ring; 10. reinforcement outer ring; 11. hollow cavity; 12. ground cage base; 13. ground roadbed; 14. medium-coarse sand cushion layer; 15. geogrid layer; 16. cushion layer; 17. roadbed filler layer. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0025] See also Figure 1-5 The utility model provides an embodiment: a cement-soil mixing pile composite foundation for reinforcement, comprising: a soft soil foundation 1, a mixing pile forming groove 4 is arranged inside the soft soil foundation 1, and the mixing pile forming groove 4 is provided with a plurality of cement-soil mixing piles 3 are arranged inside the mixing pile forming groove 4, and the cement-soil mixing piles 3 are provided with a plurality of cement-soil mixing piles 3;

[0026] Also includes:

[0027] A cement shell 5 is arranged inside the cement soil mixing pile 3, a hollow cement column 6 is arranged inside the cement shell 5, a hollow cavity 11 is arranged inside the hollow cement column 6, and the hollow cavity 11 and the hollow cement column 6 are an integrated structure, and a ground cage 7 is arranged inside the hollow cavity 11;

[0028] The reinforcement outer ring 10 is arranged on the outer wall of the hollow cement column 6 , and the reinforcement outer ring 10 and the hollow cement column 6 are integrally cast and formed, and a plurality of reinforcement outer rings 10 are arranged.

[0029] Insert the hollow cement column 6 into the cement shell 5. When the cement hardens, the cement shell 5 is formed. Since the outer wall of the hollow cement column 6 has a reinforced outer ring 10, the reinforced outer ring 10 is inserted into the hardened cement shell 5, thereby improving the stability and firmness of the connection between the cement shell 5 and the hollow cement column 6, exerting force on each other, and not easily separated and damaged, thereby improving the service life. Then insert the ground cage 7 into the hollow cement column 6, and rely on the cement filler 8 to fill the gap between the hollow cavity 11 and the ground cage 7. The cement-soil mixing pile 3 is composed of a multi-layer structure. Compared with a single cement casting, it has improved bearing capacity, is not easy to break, crack or be damaged, and improves service life and safety.

[0030] See also Figure 3 A cement filler 8 is arranged between the ground cage 7 and the hollow cement column 6, and the cement filler 8 fills the gap between the hollow cavity 11 and the ground cage 7, fixes the ground cage 7 and the hollow cement column 6, and improves the overall firmness.

[0031] See also Figure 4 The outer wall of the ground cage 7 is provided with a limiting outer ring 9, and the limiting outer ring 9 is welded and fixed to the ground cage 7. There are several limiting outer rings 9. The limiting outer rings 9 on the outer wall of the ground cage 7 are inserted into the hardened cement filler 8 to improve the firmness of the ground cage 7 and further improve the overall stability and safety.

[0032] See also Figure 4 A ground cage base 12 is provided at the lower end of the ground cage 7, and the ground cage base 12 is welded and fixed to the ground cage 7, which has a flush effect on the steel bars of the ground cage 7.

[0033] See also Figure 1 A crushed stone layer 2 is arranged on the upper end of the soft soil foundation 1, and a ground roadbed 13 is arranged on the upper end of the crushed stone layer 2 to protect the upper end of the cement soil mixing pile 3.

[0034] See also Figure 1 A medium-coarse sand cushion layer 14 is arranged inside the ground roadbed 13, a geogrid layer 15 is arranged on the upper end of the medium-coarse sand cushion layer 14, a cushion layer 16 is arranged on the upper end of the geogrid layer 15, and a roadbed filling layer 17 is arranged on the upper end of the cushion layer 16. The cement-soil mixing piles 3 are covered by the ground roadbed 13, and the ground roadbed 13 is supported by the cement-soil mixing pile composite foundation reinforced by the cement-soil mixing piles 3.

[0035] Working principle: When in use, a drilling rig is used to drill a hole in the soft soil foundation 1 to form a mixing pile forming groove, and cement is poured and mixed by the drilling rig. Cement is used as a curing agent to forcefully mix the soft soil and the curing agent deep in the foundation to harden the soft soil. Then the hollow cement column 6 is inserted into the cement just poured. When the cement hardens, a cement shell 5 is formed. Since the outer wall of the hollow cement column 6 has a reinforced outer ring 10, the reinforced outer ring 10 is inserted into the hardened cement shell 5, thereby improving the connection between the cement shell 5 and the hollow cement column 6. The connection stability and firmness, mutual force, not easy to separate and damage, and improved service life, and then the ground cage 7 is inserted into the hollow cement column 6, and the gap between the hollow cavity 11 and the ground cage 7 is filled with cement filler 8. The cement soil mixing pile 3 is composed of a multi-layer structure. Compared with a single cement casting, it has improved bearing capacity, is not easy to break, crack and damage, and improves service life and safety. The limiting outer ring 9 of the outer wall of the ground cage 7 is inserted into the hardened cement filler 8 to improve the firmness of the ground cage 7 and further improve the overall stability and safety.

[0036] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A cement-soil mixing pile composite foundation for reinforcement, comprising a soft soil foundation (1), wherein a mixing pile forming groove (4) is arranged inside the soft soil foundation (1), and the mixing pile forming groove (4) is provided with a plurality of cement-soil mixing piles (3) are arranged inside the mixing pile forming groove (4), and the cement-soil mixing piles (3) are provided with a plurality of cement-soil mixing piles (3); Features: Also includes: A cement shell (5) is arranged inside the cement soil mixing pile (3), a hollow cement column (6) is arranged inside the cement shell (5), a hollow cavity (11) is arranged inside the hollow cement column (6), and the hollow cavity (11) and the hollow cement column (6) are an integrated structure, and a ground cage (7) is arranged inside the hollow cavity (11); The reinforcing outer ring (10) is arranged on the outer wall of the hollow cement column (6), and the reinforcing outer ring (10) and the hollow cement column (6) are integrally cast and formed, and a plurality of the reinforcing outer rings (10) are provided.

2. The cement-soil mixing pile composite foundation for reinforcement according to claim 1, characterized in that: A cement filler (8) is arranged between the ground cage (7) and the hollow cement column (6), and the cement filler (8) fills the gap between the hollow cavity (11) and the ground cage (7).

3. The cement-soil mixing pile composite foundation for reinforcement according to claim 1, characterized in that: The outer wall of the ground cage (7) is provided with a limiting outer ring (9), and the limiting outer ring (9) is welded and fixed to the ground cage (7), and a plurality of the limiting outer rings (9) are provided.

4. The cement-soil mixing pile composite foundation for reinforcement according to claim 1, characterized in that: A cage base (12) is provided at the lower end of the cage (7), and the cage base (12) is fixed to the cage (7) by welding.

5. The cement-soil mixing pile composite foundation for reinforcement according to claim 1, characterized in that: A crushed stone layer (2) is arranged at the upper end of the soft soil foundation (1), and a ground roadbed (13) is arranged at the upper end of the crushed stone layer (2).

6. The cement-soil mixing pile composite foundation for reinforcement according to claim 5, characterized in that: A medium-coarse sand cushion layer (14) is arranged inside the ground roadbed (13), a geogrid layer (15) is arranged on the upper end of the medium-coarse sand cushion layer (14), a cushion layer (16) is arranged on the upper end of the geogrid layer (15), and a roadbed filling layer (17) is arranged on the upper end of the cushion layer (16).

Images