Round underground substation structure beneficial to seismic resistance

Abstract

The utility model discloses a round underground substation structure beneficial to seismic resistance, and relates to the technical field of constructional engineering. The structure comprises a structure main body and a piled raft foundation, wherein the structure main body comprises a shear wall; the shear wall is circular; the piled raft foundation comprises a raft plate located at the bottom of the shear wall, and a plurality of piles are arranged at the bottom of the raft plate at intervals. The bottom of the pile enters a rock stratum and the top lifts the frame column. Compared with a traditional rectangular underground transformer substation, the lateral stiffness of the transformer substation in all directions is consistent, no obvious weak axis exists, and therefore earthquake action in all directions can be resisted, and good anti-seismic performance is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of building engineering, and more specifically to a circular underground transformer substation structure which is beneficial to earthquake resistance. Background Art

[0002] As the power supply system for infrastructure and public buildings such as urban subways, light rails, and large commercial complexes, underground substations are of great significance for ensuring their safety and stability during natural disasters such as earthquakes, and for ensuring the normal operation of cities, post-disaster emergency rescue, and recovery and reconstruction.

[0003] In the past, it was generally believed that underground structures should have good earthquake resistance due to the constraints of the surrounding soil or rocks. However, recent studies on strong earthquake damage have shown that underground spatial structures suffered varying degrees of damage during earthquakes, and some of them were severely damaged, unable to play their due disaster resistance and relief role, and at the same time increasing the difficulty of post-disaster repair and reconstruction.

[0004] Since earthquakes are random and their source directions are uncertain, the traditional rectangular underground substation structure has inconsistent lengths in the longitudinal and transverse directions, and the lateral stiffness in the two main axis directions is quite different. Earthquakes are likely to have a greater adverse effect on the weak axis direction.

[0005] Therefore, it is necessary to develop an underground substation structure with consistent lateral stiffness in all directions, no obvious weak axis, capable of resisting earthquakes in all directions, and having good seismic performance. Summary of the invention

[0006] The purpose of the utility model is to overcome the shortcomings of the above-mentioned background technology and to provide a circular underground substation structure that is conducive to earthquake resistance.

[0007] In order to achieve the above-mentioned purpose, the technical solution of the utility model is: a circular underground substation structure that is conducive to earthquake resistance, characterized in that: it includes a structural body and a pile raft foundation, the structural body includes a shear wall; the shear wall is circular, with the same diameter as the foundation pit, and also serves as a retaining wall;

[0008] The pile raft foundation comprises a raft plate located at the bottom of the shear wall, and a plurality of piles are arranged at intervals at the bottom of the raft plate; the bottom of the piles enters the rock layer, and the top serves as a frame column;

[0009] Frame beams and floor slabs are cast between adjacent frame columns.

[0010] In the above technical solution, the thickness of the raft is greater than 2m.

[0011] Compared with the prior art, the utility model has the following advantages:

[0012] 1) Compared with the traditional rectangular underground substation, the utility model has the same lateral stiffness in all directions of the substation and has no obvious weak axis. Therefore, it can resist earthquake effects in all directions and has good seismic performance.

[0013] 2) The utility model uses one pile and one column to cast frame beams and floor slabs, so that each frame column is connected into a whole; the bottom of the pile enters the rock layer to ensure that the upper load is transmitted to the solid bearing layer below; the raft slab thickness is greater than 2m, forming a pile raft foundation with greater bearing capacity and rigidity. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a plan view of the utility model.

[0015] Figure 2 It is a cross-sectional schematic diagram of the utility model.

[0016] Among them, 1-structural main body, 11-shear wall, 12-frame beam, 13-floor slab, 2-pile raft foundation, 21-raft slab, 22-pile, 23-frame column, 3-foundation pit. DETAILED DESCRIPTION

[0017] The following is a detailed description of the implementation of the utility model in conjunction with the accompanying drawings, but they do not constitute a limitation of the utility model and are only used as examples. At the same time, the advantages of the utility model will become clearer and easier to understand through the description.

[0018] Referring to the attached drawings, it can be seen that: a circular underground substation structure that is conducive to earthquake resistance is characterized in that: it includes a structural body 1 and a pile raft foundation 2, the structural body 1 includes a shear wall 11; the shear wall 11 is circular, has the same diameter as the foundation pit 3, and also serves as a retaining wall;

[0019] The pile raft foundation 2 comprises a raft 21 located at the bottom of the shear wall 11, and a plurality of piles 22 are arranged at intervals at the bottom of the raft 21; the bottom of the pile 22 enters the rock layer, and the top is a frame column 23;

[0020] The frame beams 12 and the floor slabs 13 are cast between the adjacent frame columns 23 .

[0021] The thickness of the raft 21 is greater than 2 m.

[0022] In actual use, the construction method of the utility model includes the following steps:

[0023] Step 1, excavation of foundation pit 3, the foundation pit 3 is circular, and foundation pit support is carried out simultaneously during excavation;

[0024] Step 2, driving piles 22, the bottom of piles 22 needs to enter the rock layer to ensure that the upper load is transmitted to the solid bearing layer below;

[0025] Step 3, pouring the raft 21, the thickness of the raft 21 is greater than 2m, forming a pile raft foundation 2, which has a large bearing capacity and rigidity;

[0026] Step 4, pouring the outer shear wall 11, the shear wall 11 is circular and has the same diameter as the foundation pit 3;

[0027] Step 5, pouring frame columns 23, the positioning and number of frame columns 23 are the same as piles 22, that is, one pile and one column;

[0028] Step 6, casting the frame beams 12 and the floor slabs 13, so that the frame columns 23 are connected into a whole.

[0029] The utility model has consistent lateral stiffness in all directions and has no obvious weak axis, so it can resist earthquake effects in all directions and has good earthquake resistance.

[0030] Other parts not described belong to the prior art.

Claims

1. A circular underground substation structure that is conducive to earthquake resistance, characterized in that: It comprises a main structure (1) and a pile raft foundation (2), wherein the main structure (1) comprises a shear wall (11); the shear wall (11) is circular, has the same diameter as the foundation pit (3), and also serves as a retaining wall; The pile raft foundation (2) comprises a raft plate (21) located at the bottom of the shear wall (11), and a plurality of piles (22) are arranged at intervals at the bottom of the raft plate (21); the bottom of the piles (22) enters the rock layer, and the top of the piles (22) is a frame column (23); Frame beams (12) and floor slabs (13) are cast between adjacent frame columns (23).

2. The circular underground substation structure advantageous for earthquake resistance according to claim 1 is characterized in that: The thickness of the raft (21) is greater than 2 m.

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