Immersed tube typeinspection well and construction method thereof

Abstract

The invention discloses an immersed tube typeinspection well and a construction method thereof. theimmersed tube type inspection well comprises a pad beam, a wellbore adjustment section disposed on the lower part of a well body,a well chamber, a bottom plate and a cover plate,the well chamber comprises a well chamber upper section of a well chamber lowersection, aflow groovecommunicating a drainage pipeline is formed in the bottom of thewell chamber lowersection; the bottom plate is located below the flow groove; the cover plate is located below the wellbore adjustment section and is connectedto the wellbore adjustment section and the well chamber. The construction method includes the steps of positioning and laying off of the inspection well, road panel seam sawing and breakage, cleaningof road panel slag, leveling a base layer, well chamber installation and sinking, floor and flow groove construction, cover plate and wellbore adjustment section installation, cushionbeam construction, well cover installation and road restoration. The immersed tube type inspection well and the construction method thereof are suitable for the inspection well construction on the straight pipe section of the drainage pipeline of the horizontal directional drilling construction, the bottom plate is embedded with the well chamber througha groove, and the digging operation under a well wall is notrequired, the disturbance to the base formation is small and the waterproof effect is good, construction in silt and silty floury soil and other layers is facilitated, and pipeline engineeringconstruction can be carried out conveniently without excavation in downtown area.

Description

technical field [0001] The invention relates to an inspection well, in particular to an immersed tube type inspection well and a construction method thereof. Background technique [0002] The inspection well is set up for the convenience of maintenance such as power supply, water supply and drainage, sewage discharge, communication, and cable laying of urban underground infrastructure. It is generally installed at pipeline intersections, turns, pipe diameter or slope changes, and at certain distances on straight pipe sections, so as to facilitate regular inspection of ancillary structures. [0003] At present, after horizontal directional drilling (non-excavation laying) construction of drainage pipes, the method of open cut (open cut and grading excavation and Larsen steel sheet pile support excavation) is usually used to excavate the foundation pit of the inspection well. After excavation, brick-built inspection wells or cast-in-situ / prefabricated reinforced concrete insp...

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Problems solved by technology

Although this support excavation method has strong geological applicability, small excavation surface, and high safety and reliability, it has high cost and heavy piling equipment weight (50-60 tons), and the excavation process is easy to damage town roads, and piling operations When it is close to the house, it is easy to damage the house. It is not suitable for the situation where there are obstacles such as electric wires in the sky, and there are large boulders or dense weathered rocks and sand pebbles in the ground.

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