Modularized foundation pit supporting structure

Abstract

The invention relates to the technical field of electric power foundation pits, and discloses a modular foundation pit supporting structure which comprises a foundation pit and reusable modules in the foundation pit, and the modules are provided with standardized connecting ports capable of being quickly connected and disassembled. The modules include side wall modules, cushion layer modules, central modules, and top wall modules. The side wall module combination replaces a traditional side wall support, muck is prevented from falling, and operation can be conducted without backfilling gaps; the cushion layer module provides a stable supporting surface for the equipment; the central module facilitates installation of equipment in the pit; the top wall module provides a flat working face for ground equipment materials, the supporting structure is high in universality and adaptability, and the construction efficiency is greatly improved.

Claims

1. A modular foundation pit support structure, comprising a foundation pit (2), characterized in that: A supporting structure composed of reusable modules (3) is arranged in the foundation pit (2), and the modules (3) are provided with standardized connection interfaces (35) that can be quickly connected and disassembled; the modules (3) include side wall modules (32), and the side wall modules (32) are of a multi-layer structure.

2. The modular foundation pit support structure according to claim 1 is characterized in that: The module (3) further comprises a cushion module (31), the cushion module (31) being arranged on the bottom surface of the foundation pit (2), and the side wall module (32) being arranged on the upper part of the cushion module (31).

3. The modular foundation pit support structure according to claim 1, characterized in that: The foundation pit (2) comprises a main pit (21) and an auxiliary pit (22) extending from one side of the main pit (21).

4. The modular foundation pit supporting structure according to claim 3 is characterized in that: A central module (5) is also provided upward from the bottom of the foundation pit (2), and the central module (5) comprises a main body (51) located at the center of the main pit (21) and an auxiliary part (52) located in the auxiliary pit (22).

5. The modular foundation pit supporting structure according to claim 4 is characterized in that: A slideway (53) is also provided on the upper plane of the central module (5).

6. The modular foundation pit supporting structure according to claim 4, characterized in that: A notch (54) is provided on the main body (51) of the central module (5).

7. The modular foundation pit supporting structure according to claim 1 is characterized in that: The module (3) further comprises a top module (33), wherein the top module (33) is arranged on the upper part of the side wall module (32) and is connected and fixed to the side wall module (32).

8. A construction method for a power tower foundation pit, comprising the modular support structure according to any one of claims 1 to 6, characterized in that: Step 1: excavation of foundation pit: according to the design requirements, a main pit (21) is excavated at the diagonal center position of the four pile foundations of the power tower, and an auxiliary pit (22) is excavated on one side of the main pit to form a foundation pit (2) in the shape of a required rectangular parallelepiped pit body; after the excavation of the foundation pit (2) is completed, the bottom of the pit is integrally poured; Step 2: Laying modules: After the construction of the floor at the bottom of the foundation pit (2) is completed, the bottom of the foundation pit (2) is cleaned and leveled, and the modules are assembled according to the requirements; the side wall modules (31) are assembled on the side walls of the foundation pit, and the cushion modules (32) are laid on the bottom of the foundation pit, and the modules are quickly connected through their predetermined standardized connection interfaces (35); during the installation process, the number and arrangement of the modules are adjusted to achieve the best support effect; Step 3: Install the central module and the slideway: Install the central module (5) on the lifting cushion module (32), and install the slideway (53) on the central module (5); use bolts or slots to fix it to the lifting cushion module (32); check and debug the slideway (53) to ensure that the flatness and finish of its surface meet the requirements; Step 4: Assemble the top wall module: install the top wall module (33) on the upper part of the side wall module (31), connect the top wall module (33) and the side wall module by bolts, and connect and fix the top wall module (33) to the main foundation phases at the four corners of the power tower (9); during the connection process, pay attention to the tightening torque of the bolts to ensure the reliability of the connection; Step 5: Equipment assembly: Place the equipment in the auxiliary pit (22), transport it to the bottom of the main pit (21) through the slideway, and work together through the cylinder until all the equipment is installed; Step 6: Module removal and foundation pit backfilling: After the assembly of the power tower is completed, the side wall modules (31), bottom wall modules (32), top wall modules (33) and central modules (5) of the modular device are removed; then the excavated foundation pit (2) is backfilled; the removed modules are preliminarily cleaned at the construction site and then classified and stored in a dedicated warehouse; these modules can be directly reused in subsequent power tower construction projects after simple inspection and maintenance.

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