Rotary drilling dry-excavation method for cast-in-situ bored piles of viaduct bridges by adopting double steel protection canisters

A technology of bored piles and steel casings, which is applied to sheet pile walls, buildings, infrastructure projects, etc., can solve the problems of inability to meet standards in safe and civilized construction, inability to use the mud circulation method, and poor pile quality. The effect of safe and civilized construction, shortening pile formation time and improving quality

Inactive Publication Date: 2018-01-16
CHINA MCC17 GRP
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

For example: the geological conditions are complex, under the influence of abundant groundwater, silt, thick pebble layer and other factors, if the construction technology is not proper, the pile foundation construction process is easy to collapse the hole and the

Method used

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  • Rotary drilling dry-excavation method for cast-in-situ bored piles of viaduct bridges by adopting double steel protection canisters
  • Rotary drilling dry-excavation method for cast-in-situ bored piles of viaduct bridges by adopting double steel protection canisters

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Example Embodiment

[0031] Example 1

[0032] Such as figure 1 with figure 2 As shown, a method of rotary drilling and dry excavation of double-steel protective barrels for bored piles of viaducts is provided. An orifice steel protective barrel 6 is provided above the long protective barrel 7 of the pile body.

[0033] Preferably, it includes the following steps:

[0034] Step 1: Use the total station to stake out to determine the hole position of the pile foundation, and the rotary drill 1 is centered and placed in position by computer numerical control;

[0035] Step 2: Rotary drill 1 first excavate the hole with the designed pile diameter drill bit 3, and bury the hole steel protective tube in place;

[0036] Step 3: Rotary drill 1 replace the pilot hole bit 2 take the hole to the length of the pile body long protective tube and pile the soil;

[0037] Step 4: The lifting crane and the vibrating hammer cooperate with each other to drive the steel protective tube into the pile soil;

[0038] Step 5: Rota...

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Abstract

The invention discloses a rotary drilling dry-excavation method for cast-in-situ bored piles of viaduct bridges by adopting double steel protection canisters. Hole-opening steel protection canisters are arranged on a long protection canister of the pile body, and an outer protection canister protects a hole opening to effectively insulate surface water and make the hole opening stable; an inner protection canister insulates underground water, protects a hole wall and prevents the hole wall from collapsing, and by adopting the double protection canisters to protect the wall and replace a traditional method for using slurry to protect the wall, the slurry emission is reduced; by adopting a vibration hammer and a hoisting crane to hoist the steel protection canisters in the process of pouringconcrete, it can be ensured that the steel protection canisters can be recycled. In all, the method has the advantages that preparation of the slurry and circular protection of the wall are not required during punching, the time for pile formation is shortened, the working efficiency is improved, and the purposes of saving time and cost and improving quality are achieved.

Description

technical field [0001] The invention belongs to the field of engineering construction, including bridge construction fields such as highway bridges, municipal bridges, and railway bridges, especially in construction areas with rich groundwater, easy-to-collapse geology, and high requirements for safe and civilized construction during pile foundation construction, and specifically relates to a viaduct The double-steel casing rotary drilling and dry digging method for bored piles. Background technique [0002] The construction of bridge pile foundations under different geological conditions has different degrees of difficulty. During the construction of a considerable part of bridge pile foundations, various reasons affect the construction progress, quality and safety of bridge pile foundations. For example: the geological conditions are complex, under the influence of abundant groundwater, silt, thick pebble layer and other factors, if the construction technology is not prope...

Claims

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Application Information

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IPC IPC(8): E02D5/38E02D5/68
Inventor 张涛吕雨陶月长王瀚李茂
Owner CHINA MCC17 GRP
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