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Construction method of whirling well hanging-upside furnace wall deep foundation pit support

A technology for deep foundation pit support and construction method, which is applied to the construction field of deep foundation pit support with upside-down retaining walls of swirl wells, can solve the problems of low construction efficiency, long construction period, high labor intensity, etc., and achieves improved construction efficiency, The effect of shortened construction period

Active Publication Date: 2019-03-01
WUHAN IRON & STEEL GRP ECHENG IRON & STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of relying heavily on manual work, high labor intensity, long construction period and low construction efficiency in the construction process of deep foundation pits with large diameters and depths exceeding 10 meters. Construction method of foundation pit support

Method used

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  • Construction method of whirling well hanging-upside furnace wall deep foundation pit support
  • Construction method of whirling well hanging-upside furnace wall deep foundation pit support
  • Construction method of whirling well hanging-upside furnace wall deep foundation pit support

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Embodiment Construction

[0026] see figure 1 , figure 2 , Figure 6 , this embodiment is a construction method for deep foundation pit support of a swirl well with a diameter of 14.1m and a depth of 14.5m. The design parameters are as follows after calculation: the thickness of the retaining wall is 0.45m, and the upside-down retaining wall is divided into 9 layers, from -0.6m to -15.1m. The height of each layer from the first layer to the eighth layer is 1.7m, the height of the last layer is 0.9m, and the height of the bottom layer of the swirling well is 0.8m. The specific steps are as follows:

[0027] 1) Measure and set-out positioning, and make steel molds: Make steel molds according to the diameter of the swirling well 6. The steel molds are composed of 29 sections of retaining formwork 5, and each section of retaining formwork 5 includes two curved flat plates 51 with a radius of 7.05m ( The arc length is 1.5m), and a section of vertical arc-shaped coil 52 is welded between two arc-shaped f...

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Abstract

The invention relates to the field of building construction, in particular to a construction method of a whirling well hanging-upside furnace wall deep foundation pit support. The method comprises following steps of measuring paying-off positioning and steel mold making; secondly, dismantling barriers like underground concrete; thirdly, well site checking, marking, and primary earth cutting; fourthly, reinforcing steel bar binding, driving of wall hanging reinforcing steel bars, and mold plate erecting; fifthly, first layer of wall protecting concrete pouring; sixthly, electric single-beam crane mounting; seventhly, next segment of soil cutting, and binding of reinforcing steel bars; eighthly, after the first layer concrete is cured, using an electric single beam crane for slowly putting the steel mold down; ninthly, wall protecting concrete pouring; tenthly, repeating the steps from the seventh step to the ninth step until the soil is cut to the design elevation. An excavator is lifted out through the crane, the steel mold is dismantled, segmented lifting out is achieved through the electric single beam crane, and a well bottom base layer is poured. The construction efficiency isgreatly improved, the labor intensity is reduced, and no influence on the surrounding exists.

Description

technical field [0001] The invention relates to the field of building construction, in particular to a construction method for supporting a deep foundation pit with upside-down retaining walls in a swirl well. Background technique [0002] In construction engineering, a pit with an excavation depth of more than 5 meters is a deep foundation pit. During the construction of a deep foundation pit, it is necessary to support the retaining wall of the foundation pit. The existing support methods are as follows: one is sloping spray surface support , the construction is simple, safe and reliable, but it needs to destroy the surrounding environment, and it is only suitable for foundation pits below 5-6 meters; one is pile top load reduction and slope plus cantilever pile row support, which has a long construction period and high cost. In addition, when artificial piles are used, pile foundations cannot be constructed in case of underground obstacles and rock formations in the mid-w...

Claims

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Application Information

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IPC IPC(8): E02D17/06E02D17/08E02D29/12E03F5/04
CPCE02D17/06E02D17/08E02D29/125E02D2250/0007E02D2250/0023E03F5/0401
Inventor 冯晓明陈桂荣陈志刚刘国平高新民邵义钢胡斌
Owner WUHAN IRON & STEEL GRP ECHENG IRON & STEEL CO LTD
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