Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Watertight structure for retaining wall of ultra-deep manually excavated pile and construction method thereof

A technology of artificial excavation piles and construction methods, which is applied in the direction of infrastructure engineering, excavation, construction, etc., can solve the problems of damage to surrounding buildings, affecting the quality of excavation piles, and long construction periods, so as to enhance the anti-seepage ability and ensure Construction quality, effect of reducing excavation depth

Inactive Publication Date: 2014-02-12
CHINA CONSTR SECOND ENG BUREAU LTD
View PDF5 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide an ultra-deep artificial excavation pile retaining wall water-stop structure and its construction method, to solve the problem that the artificial excavation pile passes through the gravel layer with rich groundwater and strong water permeability or complex strata with large water flow and high fluidity of gravel. At the same time, the water seepage of the retaining wall of the manual excavation piles affects the quality of the excavation piles, and the construction period is long. Due to the destruction of the stratum structure, it directly leads to the damage of the surrounding buildings and causes major safety hazards.

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Watertight structure for retaining wall of ultra-deep manually excavated pile and construction method thereof
  • Watertight structure for retaining wall of ultra-deep manually excavated pile and construction method thereof
  • Watertight structure for retaining wall of ultra-deep manually excavated pile and construction method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0036] Examples see Figure 1~2 As shown, the ultra-deep large foundation pit is constructed in the center of the city. There is a foundation pit 15 beside the municipal road 5, and the excavated piles are densely distributed around the foundation pit 15. The inner side of each excavated pile is connected with the waist beam 3, and two excavated piles Between the piles, there is an anchor rod 6 implanted from the waist beam to the obliquely lower soil layer. Combined with the pile top crown beam 1, the waist beam 3 and the anchor rod 6 form a row of piles for support. The design diameter D of the excavated pile is 1.4 m, the design depth L is 40.0m-45.0 m, passing through backfill soil layer 7, muddy silty clay layer 8, silty clay layer 9, silty fine sand layer 10, medium-coarse sand layer 11, Silty clay layer 12, strongly weathered argillaceous siltstone layer 13, moderately weathered argillaceous siltstone layer 14, the groundwater level line 21 in the figure is relatively h...

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 watertight structure for a retaining wall of an ultra-deep manually excavated pile and a construction method thereof. According to the watertight structure and the construction method thereof, the retaining wall of each excavated pile is formed through the upper and lower connection of cast-in-situ reinforced-concrete retaining wall construction sections section by section, a watertight curtain deeply penetrates below a soil layer with strong water permeability, the inside diameter of a lower opening of the inner side face of each retaining wall construction section is greater than that of an upper opening of the inner side face of each retaining wall construction section, an annular boss is formed at the joint of an upper retaining wall construction section and a lower retaining wall construction section, and watertight sealing slurry is filled in an internal corner formed by the boss and a front retaining wall construction section; cast reinforced concrete of the retaining wall construction sections is ordinary reinforced concrete or anti-permeability reinforced concrete with an anti-permeability agent; the watertight sealing slurry is polymeric cement slurry or slurry formed through mixing water glass, cement and water. The watertight structure and the construction method thereof have the advantage that the technical problems that the quality of the excavated pile is affected caused by the fact that the retaining wall of the manually excavated pile is subjected to water permeation when the manually excavated pile passes through a gravel stratum with rich groundwater and strong water permeability or complicated stratums with large water flow, high gravel mobility and the like, the construction period is relatively long, and hidden security risks are caused due to the damage to surrounding buildings arising from damaged stratum structure are solved.

Description

technical field [0001] The invention belongs to the field of foundation pit support engineering, in particular to a water-stop structure for retaining walls of artificially dug hole piles in super-deep and large foundation pits and a construction method thereof. Background technique [0002] The manual digging pile is a kind of non-squeezing soil pile, which has a high bearing capacity of a single pile, and has the advantages of simple construction, fast construction speed, and no need for large-scale mechanical equipment. At the same time, the earthquake resistance of artificial excavated piles is stronger than that of wooden piles and concrete driven piles. It is widely used in engineering construction. [0003] General artificial hole-digging piles are suitable for strata without groundwater or clay stratum with less groundwater, silty clay stratum, and clay stratum with a small amount of sand, sand pebbles and gravels. It is not suitable for strata with quicksand or h...

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
Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/04E02D19/18
Inventor 陈星石立国丁威徐永选冯金波邓江权余德浩陈博
Owner CHINA CONSTR SECOND ENG BUREAU LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products