The treatment method of the steel casing sinking and meeting the boulder, the structure of the steel casing and the bored pile

A processing method, steel casing technology, applied in foundation structure engineering, sheet pile walls, buildings, etc., can solve problems such as jamming and edge curling at the bottom of steel casings, and achieve high efficiency, high reliability, and low efficiency Effect

Active Publication Date: 2020-11-17
CHINA RAILWAY MAJOR BRIDGE ENG GRP CO LTD
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  • Abstract
  • Description
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Problems solved by technology

The processing method of the present invention can sink the steel casing to the design elevation in the pile hole, and solve the problem that the bottom opening of the steel casing is curled or stuck when the steel casing sinks and encounters a boulder

Method used

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  • The treatment method of the steel casing sinking and meeting the boulder, the structure of the steel casing and the bored pile
  • The treatment method of the steel casing sinking and meeting the boulder, the structure of the steel casing and the bored pile
  • The treatment method of the steel casing sinking and meeting the boulder, the structure of the steel casing and the bored pile

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Embodiment Construction

[0037] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0038] The embodiment of the present invention provides a treatment method for steel casings sinking and encountering boulders, which is used for the construction of steel casings for piles with boulders 7, which is characterized in that it includes the following steps:

[0039] S1. At the designed pile position, insert the first steel casing 1 until the bottom of the first steel casing 1 encounters the boulder 7. The diameter of the first steel casing 1 is larger than the designed pile hole diameter, see figure 1 shown.

[0040] S2. Carry out the hole sweeping operation along the inner wall of the first steel casing 1, break the boulder 7 at the hole wall, and excavate the pile hole until the bottom reaches the steel casing bottom elevation 6 required by the design, see figure 2 shown. Wherein, preferably, the excavation of the pi...

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Abstract

The invention discloses a treatment method for sinking a steel casing to encounter a boulder, a steel casing structure and a drilled pile, and relates to the technical field of steel casing construction. The treatment method includes the following steps that S1, a first steel casing is inserted at a designed pile location until the bottom of the first steel casing encounters the boulder, and the diameter of the first steel casing is larger than that of a designed pile hole; S2, sweep hole operation is carried out along the inner wall of the first steel casing, the boulder at the hole wall is broken and the pile hole is excavated until the bottom of the pile hole reaches the elevation of a bottom port of the steel casing required by design; S3, a bottom port of a second steel casing is lowered to the elevation of a bottom port of the steel casing, and the diameter of the second steel casing is larger than the diameter of the designed pile hole; and S4, a gap in the first steel casing and the second steel casing is filled with concrete. According to the treatment method for sinking the steel casing to encounter the boulder, the steel casing can be lowered into the designed elevationin the pile hole, and the problem of rolled edge or stuck at the bottom port of the steel casing under the condition of steel casing sinking to encounter the boulder is solved.

Description

technical field [0001] The invention relates to the technical field of steel casing construction, in particular to a method for treating boulders encountered when a steel casing sinks, a steel casing structure and a bored pile. Background technique [0002] When bored pile construction is carried out in areas where the bedrock is granite, solitary stones, ie, spherical weathered granite, are often encountered, resulting in difficulties in driving steel casings or forming holes in pile holes for bored piles. The soil properties of the bored pile mouth are often poor in a certain length range, so steel casings are required to protect the wall to prevent the hole wall from collapsing. However, if granite boulders are encountered during the driving of the steel casing, due to the high strength of the granite boulders, the steel casing cannot be lowered to the design depth normally. Unable to log in further. [0003] Common engineering measures to deal with boulders encountered...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D7/00E02D13/08E02D5/38E02D5/66E02D5/68
CPCE02D5/38E02D5/665E02D5/68E02D7/00E02D13/08E02D2250/0007E02D2250/0023
Inventor 孙国光黄平熠张正位王天斌张红心张立超祝元林鄢盛华李国平沈大才袁灿邓永锋陈洪军李越生程细平刘剑陈文盛朱建华郑权刘宏达
Owner CHINA RAILWAY MAJOR BRIDGE ENG GRP CO LTD
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