Reclamation area ultra-deep concrete diaphragm wall structure and construction method thereof

A construction method and a technology for connecting walls to ground, which are applied in basic structure engineering, sheet pile walls, buildings, etc., can solve the problems of high construction cost, long period, and difficult earthwork excavation, so as to avoid water leakage in the later stage and ensure socket connection. Width, the effect of increasing construction efficiency

Inactive Publication Date: 2019-11-29
CHINA CONSTR FIRST BUILDING GRP CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an ultra-deep ground connection wall structure and its construction method in the reclamation area, to solve the problem of lack of reasonable mechanical matching, difficulty in earthwork excavation, and poor control of excavation verticality during construction of the ultra-deep ground connection wall structure in the sea reclamation area , high construction cost and long period of technical problems

Method used

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  • Reclamation area ultra-deep concrete diaphragm wall structure and construction method thereof
  • Reclamation area ultra-deep concrete diaphragm wall structure and construction method thereof
  • Reclamation area ultra-deep concrete diaphragm wall structure and construction method thereof

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Effect test

Embodiment 1

[0052] The inner diameter of the foundation pit of this project is 100m, and the depth of excavation is 50m. According to the geological survey report and design drawings, the ground connection wall structure penetrates into the rock, that is, the micro-weathering reaches 15m-30m, the maximum strength of the rock sample reaches 90Mpa, and the flowing water section is reasonably arranged. The total construction period of the bidding documents is 550d. Excluding the related construction of the foundation pit excavation process, the construction of the foundation pit enclosure structure can only take up to 220d. Therefore, very reasonable planning and construction deployment is required.

[0053] like figure 1 As shown, the present invention provides an ultra-deep ground connection wall structure in the reclamation area. The ground connection wall structure is annular, and the ground connection wall structure includes Type I ground connection walls 1 and Type II ground connection...

Embodiment 2

[0102] Embodiment 2, the ultra-deep ground connection wall structure and its construction method in the reclamation area, is the same as that of Embodiment 1, the difference is that the construction of the ground connection wall trenching relies on double-wheel milling machines. The specific number of machines can be: 6 sets of double-wheel milling machines. The working space of each double-wheel milling machine 6 needs to be 5*8m, and the backstage needs to be 20㎡. Efficiency in soil layer 8: the comprehensive construction efficiency of double-wheel milling 6 in soil layer 8 is 3.57m / hour; efficiency in rock layer 9: the comprehensive construction efficiency of double-wheel milling 6 is 0.01 m / hour. With the same engineering quantity as that of embodiment 1, the construction period exceeds 400 days.

Embodiment 3

[0103]Embodiment 3, the ultra-deep ground connection wall structure and its construction method in the reclamation area, is the same as that of Embodiment 1, the difference is that: first use a rotary excavator to guide the hole in the construction of the ground connection wall groove formation, and then use a double-wheel milling machine 6 to complete the construction. Groove, all the other processes are constructed with double-wheel milling 6. The specific number of machines can be: 6 sets of double-wheel milling machines, and 6 sets of rotary excavators. The working space of each double-wheel milling machine 6 needs to be 5*8m, the background needs 20㎡, and the working space of each rotary excavator is 4m*6m. Efficiency in soil layer 8: double-wheel milling 6 comprehensive construction efficiency of soil layer 8 is 3.57m / hour; efficiency in rock layer 9: double-wheel milling 6 comprehensive construction efficiency is 0.05 m / hour, rotary digging lead hole 7 efficiency is 0.3...

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Abstract

The invention discloses a reclamation area ultra-deep concrete diaphragm wall structure and a construction method thereof. The concrete diaphragm wall structure is in a ring shape, the concrete diaphragm wall structure comprises I type concrete diaphragm walls and II type concrete diaphragm walls which are arranged at intervals, the I type concrete diaphragm walls comprise I type groove sections,reinforcement cages arranged in the I type groove sections and cast-in-situ concrete, and the II type concrete diaphragm walls comprise II type groove sections, reinforcement cages arranged in the IItype groove sections and cast-in-situ concrete. Groove grasping technology construction can be conducted in advance, the construction main line time is not occupied, the construction efficiency is greatly improved, and the construction time is shortened. A reclamation area belongs to soft soil ground, soil reinforcement is conducted by using three-axis mixing before concrete diaphragm wall construction. Perpendicularity is well controlled, the width of sleeve connection is guaranteed, and later stage leakage is avoided. The formed concrete diaphragm wall structure is firm and durable, the safety level of a foundation pit support structure is the first level, and the importance factor is 1.1. The service life of the foundation pit temporary support structure is designed to be two years, andthe service life of the foundation pit support structure for permanent using is 50 years.

Description

technical field [0001] The invention relates to the field of ground connection wall construction, in particular to an ultra-deep ground connection wall structure in a sea reclamation area and a construction method thereof. Background technique [0002] The geological conditions of the reclamation area are complex, the ground wall structure penetrates into the rock (slightly weathered) reaches 15m-30m, and the maximum strength of the rock sample reaches 90Mpa. How to choose the appropriate mechanical equipment and arrange the flow section reasonably are issues that must be considered during construction. The main problems existing in the ultra-deep ground connecting wall structure in the reclamation area are: first, there are no construction samples that can be directly referred to, and the construction period is limited; second, the soil conditions are complex, the depth is large, and the earthwork excavation is difficult; third, The verticality is not easy to control; fourt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/18E02D19/18E02F5/08
CPCE02D5/18E02D19/18E02F5/08E02D2250/0023
Inventor 乔传颉徐巍王玉泽夏芬孙小明刘欢邵帅刘乐
Owner CHINA CONSTR FIRST BUILDING GRP CORP LTD
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