Support construction process of lotus root-shaped segmental expanded soil anchor rod

A construction technology and bolt support technology, which is applied in the direction of foundation structure engineering, sheet pile walls, excavation, etc., can solve the problems of foundation pit support construction, complex demolition, high construction cost, and difficult earthwork excavation, etc., to achieve Improve the tensile (pull) ability, reduce the difficulty of construction, and reduce the effect of construction cost

Inactive Publication Date: 2011-10-05
浙江中联建设集团有限公司
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AI Technical Summary

Problems solved by technology

There are more and more applications for high-rise buildings and deep foundation pits in urban areas, and the area of ​​foundation pits is also increasing. Traditional support piles + purlins + steel pipe support or concrete support systems are used, and the construction and demolition of foundation pit support are complicated. Earthwork excavation is difficult and the construction cost is very high, accounting for 10% to 20% of the entire building

Method used

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  • Support construction process of lotus root-shaped segmental expanded soil anchor rod
  • Support construction process of lotus root-shaped segmental expanded soil anchor rod
  • Support construction process of lotus root-shaped segmental expanded soil anchor rod

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Embodiment 1

[0024] A kind of bolt support construction technology of lotus root shape segmental expansion soil layer of this embodiment, such as figure 1 , figure 2 As shown, the construction process is to drill holes in the ground or deeply excavated basement wall (retaining wall, pile or underground continuous wall) or unexcavated foundation pit vertical wall soil layer to reach a certain design depth, through the mud retaining wall, Rinse to form a columnar hole, put the pre-made and wrapped anchor rod steel bar in the hole, inject cement slurry or chemical slurry through the pre-embedded grouting pipe, expand and squeeze the muddy soil layer in the hole wall , use the plastic short hose and the grout filling hose as the ventilation pipe in advance to discharge the air in the hole, so that the braided pipe bag of the jacket is fully swollen, and it is closely combined with the soil layer to form a lotus root shape anchor rod; the lotus root to be carried out in this embodiment The sc...

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Abstract

The invention discloses a support construction process of a lotus root-shaped segmental expanded soil anchor rod, which comprises the following steps: drilling a hole in the ground or the wall surface of a deeply-excavated basement or the vertical wall of an unexcavated foundation pit to a certain designed depth, flushing by using a slurry wall protection method to form a columnar hole, placing aprefabricated anchor rod steel bar wrapped by a woven tubular bag in the hole, injecting a cement paste or a chemical grout through a pre-embedded injection pipe, carrying out segmental expansion andextrusion on sludge soil in the hole wall, using a pre-arranged plastic short hose and a paste complement tube as ventilation tubes, and discharging air in the hole to fully expand the wrapped woven tubular bag to be tightly combined with the soil so as to form a lotus root-shaped anchor rod. By using the anchor rod support construction method according to local conditions, the invention can greatly reduce the construction cost of foundation pit support, shorten the construction period, lower the construction difficulty, save energy and materials, and has the characteristics of portable construction machinery and simple operation.

Description

technical field [0001] The invention relates to a lotus root-shaped segmented expansion soil bolt support construction technology. Background technique [0002] With the rapid development of my country's economy and the continuous expansion of urban scale, urban land has entered the era of every inch of land. The national policy also proposes to build a conservation-oriented society, advocate land and material conservation, and rationally develop underground space. There are more and more applications for high-rise buildings and deep foundation pits in urban areas, and the area of ​​foundation pits is also increasing. Traditional support piles + purlins + steel pipe support or concrete support systems are used, and the construction and demolition of foundation pit support are complicated. The earth excavation is very difficult and the construction cost is very high, accounting for 10% to 20% of the whole building. Contents of the invention [0003] The purpose of the pre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D17/20E02D5/76
Inventor 陈国仕王形周光华陈玲芬谢亚琴
Owner 浙江中联建设集团有限公司
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