Construction method of hydraulic drill excavation of catenary post foundation pit

Abstract

The invention discloses a construction method of hydraulic drill excavation of a catenary post foundation pit. The construction method comprises the following steps of (1) positioning the foundation pit: measuring and setting out the forming position of the to-be-excavated catenary post foundation pit; (2) installing a hydraulic drill excavation device: installing the hydraulic drill excavation device which is used for excavating the catenary post foundation pit; and (3) performing hydraulic drill excavation: excavating the catenary post foundation pit from top to bottom by multiple sections by adopting the hydraulic drill excavation device: excavating any section of the catenary post foundation pit as follows: drilling, crushing stratums and removing stones after crushing. The construction method has the advantages of simple step, reasonable design, simplicity and convenience in construction, good use effect, economy, practicability, energy conservation and environmental friendliness,the hydraulic drill excavation is performed on the catenary post foundation pit from top to bottom by multiple sections, the catenary post foundation pit can be simply and quickly excavated, and thecircumferential stratum disturbance is less during excavation.

Description

technical field [0001] The invention belongs to the technical field of catenary construction, and in particular relates to a water-drilling excavation method for foundation pits of catenary pillars. Background technique [0002] The catenary is a high-voltage transmission line erected in a "zigzag" shape along the sky above the rails in the electrified railway for pantographs to take current. The catenary is the main frame of the railway electrification project. It is a special form of transmission line erected along the railway line to supply power to the electric locomotive. It is composed of contact suspension, support device, positioning device, pillar and foundation. Among them, the pillar (also known as the catenary pillar) is the supporting equipment of the catenary, and the pillar is the catenary equipment used to bear the load of the contact suspension and the support device and fix the contact suspension at a specified height. When constructing the catenary in the...

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Problems solved by technology

[0003] At present, when non-blasting excavation is carried out on stone foundation pits, the excavation method is usually manually excavated by combining an air compressor and a pneumatic pick. When excavating a cubic foundation pit of 3.0m, it takes 2 people to cooperate and it takes about 15 days to complete the excavation. The labor cost and fuel cost are high, especially when there are many foundation pits to be excavated. higher

In addition, most of the excavation methods in rocky areas today are blasting, crushing, expansion, etc., and generally use large-scale mechanical equipment, which requires many workers, inconvenient transportation, high equipment investment costs, and low construction efficiency. Side environmental pollution is more serious

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