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Construction method of minor diameter pile inside city underground construction underground excavation pilot tunnel

A technology of underground engineering, construction method, applied in the direction of foundation structure engineering, sheet pile wall, earth cube drilling and mining, etc.

Inactive Publication Date: 2013-06-26
BEIJING CONSTR ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the characteristics of the construction environment, it is of great practical significance to improve the existing side pile construction technology and construction equipment, and the relevant research work has not been reported yet.

Method used

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  • Construction method of minor diameter pile inside city underground construction underground excavation pilot tunnel
  • Construction method of minor diameter pile inside city underground construction underground excavation pilot tunnel
  • Construction method of minor diameter pile inside city underground construction underground excavation pilot tunnel

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Embodiment Construction

[0034] Olympic Park Station is the transfer station of Metro Line 15 and Line 8. The station is located in the central area of ​​the Olympic Games, under the urban tunnel of Datun Road, reserved on the west side of the bus node, and arranged along the east-west direction of Datun Road. Surrounding it are the National Convention Center, National Stadium, Water Cube, Bird's Nest and other Olympic venues.

[0035] The main structure of the station is an underground two-storey, three-span, flat-top and straight-wall structure, which is constructed using the PBA construction method of underground excavation. The total length of the station is 205.5m, and the total width is 23.1m. The roof of the station is close to the Datun Road Tunnel, and the soil above the Datun Road Tunnel is about 3.5m. The main structure of the station is equipped with 4 pilot tunnels, and the side piles of the station are constructed in 2 side pilot tunnels. There are two types of side piles, one with a d...

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Abstract

The invention discloses a construction method of a minor diameter pile inside a city underground construction underground excavation pilot tunnel. The construction method of the minor diameter pile inside the city underground construction underground excavation pilot tunnel comprises the following steps: surveying and setting out, pile test, reinforcement cage machining, track laying, equipment lifting, pile casing construction, drill hole construction, reinforcement cage installing and concrete pouring, wherein a drill hole construction equipment system can be divided into four sub systems, namely a drilling system, a slagging system, a mud-water separation system and a slurry filling system. Based on an existing construction method of the minor diameter pile inside a pilot tunnel, surrounding environment requirements are taken into overall consideration, the construction method of the minor diameter pile inside city underground construction underground excavation pilot tunnel is put forward, pile forming efficiency and pile forming quality of construction of the minor diameter pile in a narrow space are guaranteed, influence on city underground construction on surrounding buildings, earth surface traffic and an underground pipeline is effectively reduced, and remarkable social benefit and economic benefit are possessed.

Description

technical field [0001] The invention relates to a construction method for small-diameter piles in underground excavation pilot tunnels of urban underground engineering, and belongs to the technical field of underground construction engineering. Background technique [0002] The tunnel pile method is a construction method combining the open-cut frame structure construction method and the underground excavation method. It has the advantages of little impact on the surrounding environment and effective control of ground deformation. In the hole pile method construction, side piles, column top longitudinal beams and top arches are firstly constructed in the pilot tunnel excavated first to provide a support and protection system for subsequent construction, and finally the outer side piles, top arches and inner layer secondary lining are formed. Composed of permanent bearing system. Therefore, side pile construction is one of the most critical technologies of hole pile method co...

Claims

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Application Information

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IPC IPC(8): E02D5/38E21B21/00E21B21/01E21B21/06
Inventor 张宏韩竹青胡宏飚赵磊磊王生
Owner BEIJING CONSTR ENG GRP CO LTD
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