Supporting structure of foundation pit for machine tool equipment foundation

Abstract

The utility model relates to a supporting structure of a foundation pit for a machine tool equipment foundation. The supporting structure comprises an inner row pile group and an outer row pile group, the inner-row pile group and the outer-row pile group are arranged in double rows, the inner-row pile group is located on the inner side of the outer-row pile group, the inner-row pile group comprises a plurality of first pile bodies, the first pile bodies are cement-soil mixing piles, the first pile bodies are vertically arranged in the length direction, and the first pile bodies are sequentially arranged along the walking path of the supporting structure; a first overlapping area is formed between every two adjacent first pile bodies; the outer row pile group comprises a plurality of second pile bodies and a plurality of third pile bodies, the second pile bodies and the third pile bodies are cement-soil mixing piles, reinforcing steel is inserted into the third pile bodies, the second pile bodies and the third pile bodies are arranged in the vertical direction in the length direction, the second pile bodies and the third pile bodies are sequentially and alternately arranged along the walking path of the supporting structure, and the second pile bodies and the third pile bodies are arranged in the vertical direction. And a second overlapping area is formed between each adjacent second pile body and third pile body.

Description

Technical Field

[0001] The utility model relates to the technical field of construction, in particular to a supporting structure of a foundation pit for machine tool equipment foundations. Background Art

[0002] The support structure is a protective measure to ensure the safety of the surrounding environment of the foundation pit. The support structure is mainly used to withstand the lateral soil pressure to support the side walls of the foundation pit, so as to ensure the structural stability of the foundation pit. In the installation scenario of large machine tools, such as the Parma boring machine SPEEDRAM 3000, the equipment has a volume of 13.62m×19.14m×4.3m, and the maximum dynamic load of the equipment is about 100 tons. Due to the large volume, high maximum dynamic load and high operating precision of the large machine tool equipment, the equipment foundation needs to have high anti-settlement, anti-tilting and seismic performance. In order to meet the installation requirements of large machine tools with high operating precision, the foundation bearing of the machine tool equipment is usually installed in the foundation pit, which has high requirements for the structural stability of the foundation pit. In areas with soft soil geology, the existing support structure is difficult to meet the construction requirements of the foundation pit. Utility Model Content

[0003] The utility model aims to provide a supporting structure for a foundation pit of a machine tool equipment, which has the advantages of being applicable to water stopping requirements and protection requirements of a deeper foundation pit.

[0004] The technical solution adopted by the utility model to solve the technical problem is: a supporting structure for a foundation pit for a machine tool equipment foundation includes an inner row pile group and an outer row pile group; the inner row pile group and the outer row pile group are arranged in double rows, the inner row pile group is located on the inner side of the outer row pile group, the inner row pile group includes a plurality of first pile bodies, the first pile bodies are cement soil mixing piles, the length directions of the first pile bodies are arranged vertically, the plurality of first pile bodies are arranged in sequence along the walking path of the supporting structure, the axial center spacing between each adjacent two first pile bodies is less than the pile diameter of the first pile body, so that a first overlapping area is formed between each adjacent two first pile bodies; the outer row pile group includes a plurality of second pile bodies and a plurality of third pile bodies. The pile body, the second pile body and the third pile body are cement-soil mixing piles, and the third pile body is inserted with reinforcing steel. The length directions of the second pile body and the third pile body are respectively arranged vertically. A plurality of second pile bodies and a plurality of third pile bodies are arranged alternately in sequence along the walking path of the support structure. The axial center spacing between each adjacent second pile body and the third pile body is less than the sum of the pile radius of the second pile body and the pile radius of the third pile body, so that a second overlapping area is formed between each adjacent second pile body and the third pile body; the top ends of the first pile body, the second pile body and the third pile body are respectively flush with each other, and the bottom ends of the first pile body, the second pile body and the third pile body respectively pass through the soft soil layer and are embedded in the bearing layer.

[0005] The working principle of this utility model:

[0006] By forming a first overlapping area between two adjacent first pile bodies of the inner row pile group, the inner row pile group has continuity and forms a whole. Similarly, by forming a second overlapping area between the adjacent second pile bodies and the third pile bodies of the outer row pile group 2, the outer row pile group has continuity and forms a whole. The inner row pile group and the outer row pile group are arranged in double rows, so that the structural strength and stability of the support structure are high, which can meet the construction requirements of the foundation pit for large machine tool equipment in soft soil areas. In addition, such a structure also has good water-stopping performance, which can effectively block the flow and penetration of groundwater and is not easy to cause corrosion to the machine tool equipment foundation in the foundation pit. In addition, during construction, the inner row pile group is constructed first and set close to the foundation pit. The outer row pile group is arranged alternately by a plurality of second pile bodies and a plurality of third pile bodies, and a reinforcing steel is inserted in the third pile body, which can further strengthen the bearing capacity of the outer row pile group against the lateral soil pressure and further improve the structural strength and stability of the support structure.

[0007] Furthermore, in the support structure of the foundation pit for machine tool equipment as described above, the axial distance between each adjacent first pile body and the second pile body is smaller than the sum of the pile radius of the first pile body and the pile radius of the second pile body, so that a third overlapping area is formed between each adjacent first pile body and the second pile body; the axial distance between each adjacent first pile body and the third pile body is smaller than the sum of the pile radius of the first pile body and the pile radius of the third pile body, so that a fourth overlapping area is formed between each adjacent first pile body and the third pile body.

[0008] Furthermore, in the aforementioned support structure for the foundation pit of the machine tool equipment, the first pile body, the second pile body, and the third pile body each have the same pile diameter.

[0009] Furthermore, in the supporting structure of the foundation pit for machine tool equipment as described above, the first pile bodies of the inner row pile group and the second pile bodies and the third pile bodies of the outer row pile group are arranged in a rectangular array.

[0010] Furthermore, in the aforementioned support structure for the foundation pit of the machine tool equipment, the pile diameter of each of the first pile body, the second pile body and the third pile body is in the range of 500 mm to 700 mm.

[0011] Furthermore, in the supporting structure of the foundation pit for machine tool equipment as mentioned above, the difference between the axial distance between each adjacent two first pile bodies and the pile diameter of the first pile body is in the range of 150mm to 250mm; the difference between the axial distance between each adjacent second pile body and the third pile body and the sum of the pile radius of the second pile body and the pile radius of the third pile body is in the range of 150mm to 250mm.

[0012] Furthermore, in the supporting structure of the foundation pit for machine tool equipment as mentioned above, the difference between the axial distance between each adjacent first pile body and the second pile body and the sum of the pile radius of the first pile body and the pile radius of the second pile body is in the range of 50mm to 150mm; the difference between the axial distance between each adjacent first pile body and the third pile body and the sum of the pile radius of the first pile body and the pile radius of the third pile body is in the range of 50mm to 150mm.

[0013] Furthermore, in the aforementioned support structure for the foundation pit of the machine tool equipment, the bottom ends of the first pile body, the second pile body, and the third pile body are respectively embedded in the bearing layer to a depth greater than 2m.

[0014] Furthermore, in the supporting structure of the foundation pit for the machine tool equipment as mentioned above, the reinforcing steel is a profile steel with an H-shaped cross-section.

[0015] The technical solution of the utility model has the following beneficial effects: it can be applied to foundation pit construction with a depth of up to 20 meters, and has high structural strength and good water-stopping performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the plan structure of the foundation pit of the embodiment;

[0017] Figure 2 for Figure 1 The cross-sectional structure diagram in the AA direction;

[0018] Figure 3 A schematic diagram of the layout structure of the support structure of an embodiment;

[0019] Description of reference numerals:

[0020] 1-inner row of piles; 11-first pile body; 2-outer row of piles; 21-second pile body; 22-third pile body; 23-reinforcement steel; 3-first overlapping area; 4-second overlapping area; 5-third overlapping area; 6-fourth overlapping area. DETAILED DESCRIPTION

[0021] In order to have a clearer understanding of the technical features, purposes and effects of the present utility model, the specific implementation methods of the present utility model are now described in detail with reference to the accompanying drawings.

[0022] like Figures 1 to 3The support structure of the foundation pit for the machine tool equipment of the embodiment includes an inner row pile group 1 and an outer row pile group 2; the inner row pile group 1 and the outer row pile group 2 are arranged in double rows, the inner row pile group 1 is on the inner side of the outer row pile group 2, the inner row pile group 1 includes a plurality of first pile bodies 11, the first pile bodies 11 are cement-soil mixing piles, the length directions of the first pile bodies 11 are arranged vertically, and the plurality of first pile bodies 11 are arranged in sequence along the walking path of the support structure, and the axial distance between each adjacent two first pile bodies 11 is less than the pile diameter of the first pile bodies 11, so that a first overlapping area 3 is formed between each adjacent two first pile bodies 11; the outer row pile group 2 includes a plurality of second pile bodies 21 and a plurality of third pile bodies 22, the second pile body 21 and the third pile body 22 are both cement-soil mixing piles, and a reinforcing steel 23 is inserted in the third pile body 22, and the reinforcing steel 23 is a profile steel with an H-shaped cross section. In the embodiment, the reinforcing steel 23 is made of Q235B steel; the second pile body 21 and the third pile body 22 are respectively arranged in a vertical direction in their length directions, and a plurality of second pile bodies 21 and a plurality of third pile bodies 22 are arranged alternately in sequence along the walking path of the support structure, and the axial center spacing between each adjacent second pile body 21 and the third pile body 22 is less than the sum of the pile radius of the second pile body 21 and the pile radius of the third pile body 22, so that a second overlapping area 4 is formed between each adjacent second pile body 21 and the third pile body 22; the top ends of the first pile body 11, the second pile body 21, and the third pile body 22 are respectively flush with each other, and the bottom ends of the first pile body 11, the second pile body 21, and the third pile body 22 pass through the soft soil layer and are embedded in the bearing layer. The bearing layer of this embodiment is a medium sand layer, and the depth of the bottom ends of the first pile body 11, the second pile body 21, and the third pile body 22 embedded in the bearing layer is greater than 2m.

[0023] The working principle of this embodiment:

[0024] By forming a first overlapping area 3 between each adjacent two first pile bodies 11 of the inner row pile group 1, the inner row pile group 1 has continuity and constitutes a whole. Similarly, by forming a second overlapping area 4 between each adjacent second pile body 21 and third pile body 22 of the outer row pile group 2, the outer row pile group 2 has continuity and constitutes a whole. The design of arranging the inner row pile group 1 and the outer row pile group 2 in double rows makes the structural strength and stability of the supporting structure higher, which can meet the construction requirements of foundation pits for large machine tool equipment in soft soil areas. In addition, such a structure also has good water-stopping performance, which can effectively block the flow and penetration of groundwater and is not easy to cause corrosion to the machine tool equipment foundation in the foundation pit. In addition, during construction, the inner row of pile groups 1 are constructed first and set close to the foundation pit. The outer row of pile groups 2 are arranged alternately by a plurality of second pile bodies 21 and a plurality of third pile bodies 22, and a reinforcing steel 23 is inserted in the third pile body 22. This can further enhance the bearing capacity of the outer row of pile groups 2 against lateral soil pressure, and further improve the structural strength and stability of the support structure.

[0025] like Figure 3 As shown, the axial distance between each adjacent first pile body 11 and the second pile body 21 is smaller than the sum of the pile radius of the first pile body 11 and the pile radius of the second pile body 21, so that a third overlapping area 5 is formed between each adjacent first pile body 11 and the second pile body 21; the axial distance between each adjacent first pile body 11 and the third pile body 22 is smaller than the sum of the pile radius of the first pile body 11 and the pile radius of the third pile body 22, so that a fourth overlapping area 6 is formed between each adjacent first pile body 11 and the third pile body 22. Such a design makes the inner row pile group 1 and the outer row pile group 2 continuous and form a whole, making the structure of the support structure more stable.

[0026] like Figure 3 As shown, the first pile body 11, the second pile body 21, and the third pile body 22 have the same pile diameter, and the pile diameter D1 of the first pile body 11, the second pile body 21, and the third pile body 22 is 600 mm; the first pile bodies 11 of the inner pile group 1 and the second pile bodies 21 and the third pile bodies 22 of the outer pile group 2 are arranged in a rectangular array; the difference between the axial distance between each adjacent two first pile bodies 11 and the pile diameter of the first pile body 11, the difference between the axial distance between each adjacent second pile body 21 and the third pile body 22 and the sum of the pile radius of the second pile body 21 and the pile radius of the third pile body 22 are all 200 mm, that is, each adjacent two first pile bodies 11 are arranged in a rectangular array. The axial spacing between the adjacent first pile bodies 11 and the axial spacing between the adjacent second pile bodies 21 and the third pile bodies 22 is D2, and D2 is 400mm; the difference between the axial spacing between the adjacent first pile bodies 11 and the second pile bodies 21 and the sum of the pile radius of the first pile body 11 and the pile radius of the second pile body 21, and the difference between the axial spacing between the adjacent first pile bodies 11 and the third pile bodies 22 and the sum of the pile radius of the first pile body 11 and the pile radius of the third pile body 22 is 100mm, that is, the axial spacing between the adjacent first pile bodies 11 and the second pile bodies 21, and the axial spacing between the adjacent first pile bodies 11 and the third pile bodies 22 is D3, and D3 is 500mm. Such a design makes the structures of the first overlapping area 3 and the second overlapping area 4 the same, and the structures of the third overlapping area 5 and the fourth overlapping area 6 the same, thereby making the arrangement structure of the first pile body 11, the second pile body 21, and the third pile body 22 more reasonable, thereby making the structure of the support structure more stable.

[0027] The above description is only the preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications, combinations and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the scope of the claims of the utility model.

Claims

1. Support structure of foundation pit for machine tool equipment. Features: It includes an inner row pile group and an outer row pile group; the inner row pile group and the outer row pile group are arranged in double rows, the inner row pile group is on the inner side of the outer row pile group, the inner row pile group includes a plurality of first pile bodies, the first pile bodies are cement soil mixing piles, the length directions of the first pile bodies are arranged vertically, and the plurality of first pile bodies are arranged in sequence along the walking path of the supporting structure, the axial distance between each adjacent two first pile bodies is less than the pile diameter of the first pile body, so that a first overlapping area is formed between each adjacent two first pile bodies; the outer row pile group includes a plurality of second pile bodies and a plurality of third pile bodies, the second pile body and the third pile body are both cement soil mixing piles The second pile body and the third pile body are respectively arranged in a vertical direction in their length directions. A plurality of second pile bodies and a plurality of third pile bodies are alternately arranged in sequence along the walking path of the support structure. The axial center spacing between each adjacent second pile body and the third pile body is smaller than the sum of the pile radius of the second pile body and the pile radius of the third pile body, so that a second overlapping area is formed between each adjacent second pile body and the third pile body; the top ends of the first pile body, the second pile body and the third pile body are respectively flush with each other, and the bottom ends of the first pile body, the second pile body and the third pile body respectively pass through the soft soil layer and are embedded in the bearing layer.

2. The support structure for the foundation pit of a machine tool equipment according to claim 1, Features: The axial center distance between each adjacent first pile body and the second pile body is smaller than the sum of the pile radius of the first pile body and the pile radius of the second pile body, so that a third overlapping area is formed between each adjacent first pile body and the second pile body; the axial center distance between each adjacent first pile body and the third pile body is smaller than the sum of the pile radius of the first pile body and the pile radius of the third pile body, so that a fourth overlapping area is formed between each adjacent first pile body and the third pile body.

3. The support structure for the foundation pit of a machine tool equipment according to claim 1 or 2, Features: The first pile body, the second pile body and the third pile body have the same pile diameter.

4. The support structure for the foundation pit of a machine tool equipment according to claim 3, Features: The first pile bodies of the inner row pile group and the second pile bodies and the third pile bodies of the outer row pile group are arranged in a rectangular array.

5. The support structure for the foundation pit of a machine tool equipment according to claim 1 or 2, Features: The pile diameter of each of the first pile body, the second pile body and the third pile body is in the range of 500 mm to 700 mm.

6. The support structure for the foundation pit of a machine tool equipment according to claim 1 or 2, Features: The difference between the axial center distance between each adjacent two first pile bodies and the pile diameter of the first pile body is in the range of 150mm to 250mm; the difference between the axial center distance between each adjacent second pile body and third pile body and the sum of the pile radius of the second pile body and the pile radius of the third pile body is in the range of 150mm to 250mm.

7. The support structure for the foundation pit of a machine tool equipment according to claim 2, Features: The difference between the axial center distance between each adjacent first pile body and the second pile body and the sum of the pile radius of the first pile body and the second pile body is within the range of 50mm to 150mm; the difference between the axial center distance between each adjacent first pile body and the third pile body and the sum of the pile radius of the first pile body and the third pile body is within the range of 50mm to 150mm.

8. The support structure for the foundation pit of a machine tool equipment according to claim 1 or 2, Features: The depth at which the bottom ends of the first pile body, the second pile body and the third pile body are embedded in the bearing layer is greater than 2m.

9. The support structure for the foundation pit of a machine tool equipment according to claim 1 or 2, Features: The reinforcing steel is a profile steel with an H-shaped cross section.

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