In-rock deep foundation pit rock-socketed water-stop curtain construction method

A technology of water-stop curtain and construction method, which is applied in infrastructure engineering, excavation, construction, etc., and can solve problems such as difficult construction, high cost, and low efficiency

Inactive Publication Date: 2014-06-11
CHINA MCC20 GRP CORP
View PDF5 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the commonly used three-axis mixing pile water-stop curtain has low efficiency, high construc

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0011] In the present invention, a grouting pipe (drill pipe) with a special nozzle is drilled into a predetermined depth of the treated soil layer, and then the cement slurry is punched to the soil body under high pressure. While spraying the slurry, it rotates and lifts at a certain speed to form a cement-soil cylinder. Improve the strength of the soil, block the seepage gaps and fissures, and form a waterproof curtain. For the gap between the wall of the mixing pile and the coral debris and granular rock, the high-pressure slurry can pass through the gap to fill the gap with the slurry; or use high-pressure punching to cut the gravel layer and form a water-stop curtain through the mud. In order to ensure that the rock layer interface can also be water-stopped by grouting, an alloy or diamond drill bit can be used to drill to a certain depth under the bedrock surface to start grouting. By controlling the lifting speed, grouting pressure and ensuring the amount of grouting t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a deep foundation pit, in particular to a deep foundation pit water-stop curtain construction method. An in-rock deep foundation pit rock-socketed water-stop curtain construction method comprises the following steps: 1) stopping water in a highly permeable layer above a rock layer by using three-axis cement mixing piles; 2) clearly exploring the situations of distribution and elevations of sand-containing coral debris, highly-weathered granite layers and medium-weathered granite layers by adopting a preliminary hole prospecting technology, and guiding the construction of the three-axis cement mixing piles and high-pressure jet grouting piles through information; 3) performing fully-closed water interception on the rock layer and an interface between the rock layer and the sand-containing coral debris by adopting the high-pressure jet grouting piles. The in-rock deep foundation pit rock-socketed water-stop curtain construction method has the advantages that two structural geological layer enclosure structures are bonded into an integral body, the seepage problem of the seeping interface is treated very well, the foundation pit excavation and the foundation construction are guaranteed to be performed in a waterless state and the foundation pit safety is also guaranteed.

Description

technical field [0001] The invention relates to deep foundation pits, in particular to a construction method for water-stop curtains in deep foundation pits. Background technique [0002] In the coastal areas of South my country such as Hainan in China, the upper stratum is filled with soil, fine sand and sandy coral debris, and the lower stratum is granite. The fine sand layer and the sandy coral clast layer are extremely permeable layers with extremely high water content. The rock mass of the granite layer is basically complete and the water volume is not large, but the possibility of the development of tension fissures in some sections and abundant water volume cannot be ruled out. Furthermore, there is a hydraulic connection between the coastal seawater and the groundwater of the site, which brings great difficulties to the enclosure and earthwork excavation of the deep foundation pit whose bottom elevation enters the rock layer, especially the strong permeable interfac...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): E02D19/18E02D17/02
Inventor 周红萍史册蒋建忠代景艳
Owner CHINA MCC20 GRP CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap