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Deep foundation pit supporting method and system characterized by steel reinforced cement-soil piles, bolts easy to detach and automatic monitoring and early warning

A technology for deep foundation pit support and cement-soil piles, which is applied in excavation, alarms, infrastructure engineering, etc., can solve the problems of lack of focus on dynamic adjustment of informatization, affecting the construction of underground engineering, and not adapting to groundwater, etc. Good economic and social benefits, simple structure, and the effect of reducing construction costs

Active Publication Date: 2015-04-22
WUHAN ZHONGLI GEOTECHN ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that plain concrete is used as the backfill in the pile, which has high strength, and waste concrete will be left in the surrounding soil, which will affect the subsequent underground construction
The disadvantage is that the manual digging method is not suitable for the situation of groundwater, and has been banned in some provinces and regions; in addition, the method of pouring cement-soil slurry into the hole is not conducive to the improvement of construction efficiency
Others, such as the wireless foundation pit automatic monitoring system invented by Li Siding (ZL: CN201420426854), and the wireless monitoring and early warning system of deep foundation pit comprehensive parameters invented by Xiao Jinqiu (ZL: CN201410318451), all focus on the improvement of wireless transmission methods, while for key monitoring The low-cost acquisition method of parameters and data processing and early warning feedback are rarely involved
In addition, because the bolt is the key adjustable factor to ensure the safety of the foundation pit, the existing patents do not focus on the informationization of the dynamic adjustment of the bolt

Method used

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  • Deep foundation pit supporting method and system characterized by steel reinforced cement-soil piles, bolts easy to detach and automatic monitoring and early warning
  • Deep foundation pit supporting method and system characterized by steel reinforced cement-soil piles, bolts easy to detach and automatic monitoring and early warning

Examples

Experimental program
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Effect test

Embodiment 1

[0046] The construction of this method is simple. After using rotary digging or reverse circulation drilling rig to construct borehole 03, backfill the soil excavated from the borehole and then use a cement-soil mixing pile machine to add cement to the hole to form cement-soil 11. Lift the shaped steel 10 on the top of the drilled hole and drive it into the drilled hole 03 through vibration, then use a drilling machine to form a hole to construct the glass fiber anchor rod 20, install the stress sensor 33, and then install the connecting beam 13 around the shaped steel cement soil pile 12 Between the anchor head 21, an inductive static level 32 is finally installed on the ground surface 00 around the foundation pit. During the excavation of the foundation pit, a modular inclination sensor 34 is installed layer by layer on the steel cement soil pile circumference 12, and all sensors It is connected with the automatic data acquisition instrument 31, and the data acquisition instr...

Embodiment 2

[0060] according to figure 1 , figure 2 It can be seen that a type of steel cement soil pile + easily broken anchor + automatic monitoring and early warning of deep foundation pit support system , it consists of steel cement soil piles including steel 10 and cement soil 11, glass fiber anchor 20 includes the first glass fiber anchor 20a, the second glass fiber anchor 20b, the third glass fiber anchor 20b, anchor head 21 includes the first One anchor head 21a, the second anchor head 21b, the third anchor head 21c, the connecting beam 13 includes the first connecting beam 13a, the second connecting beam 13b, the third connecting beam 13c, the inclination sensor 34 includes the first inclination sensor 34a, the Two inclination sensors 34b, the third inclination sensor 34c, the electrostatic level 32, and the stress sensor 33 comprise the first stress sensor 33a, the second stress sensor 33b, the third stress sensor 33c, and the automatic monitoring and early warning system 30....

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Abstract

The invention discloses a deep foundation pit supporting method and system characterized by steel reinforced cement-soil piles, bolts easy to detach and automatic monitoring and early warning. The method comprises the steps of A, rotationally excavating or reversely circularly drilling holes in foundation soil; B, stirring in holes: filling soil material and adding cement into the drilled holes to stir to prepare cement soil; C, placing shape steel: hoisting the shape steel into the drilled holes to form the steel reinforced cement-soil piles through a crawling crane; D, constructing the bolts easy to detach: constructing fiberglass bolts and installing bolt heads row by row; E, installing coupling beams: the coupling beams are connected with the circumferences of the steel reinforced cement-soil piles in a building-in mode through locking the bolt heads; F, installing sensors of sedimentation and the like; G, operating the system of automatic monitoring and early warning: monitoring and warning in real time, and achieving information construction of the bolts. The method and system are appropriate for grit or hard clay stratums, high underground water level stratums, ordinary stratums, weakly and mediumly weathered bedrocks, and the construction is simple and convenient; the shape steel and the sensors can be recycled, the cost is reduced, and concrete residual is avoided; monitoring and warning in real time are conducted to guarantee the safety of the foundation pits, and the method and system are appropriate for significant deep foundation pit engineering in a city.

Description

technical field [0001] The invention relates to the field of foundation pit support technology, in particular to a deep foundation pit support method comprising a steel cement-soil pile + easy-to-break anchor + automatic monitoring and early warning, and also relates to a steel-cement-soil pile + easy-to-break anchor + Deep foundation pit support system with automatic monitoring and early warning. Background technique [0002] With the development of high-rise buildings and the development and utilization of urban underground space, there are more and more foundation pit projects. The foundation pit support project is an important measure related to the construction progress and safety of many construction projects. It often takes a very high price and a long time to complete a deep and large foundation pit under complex geological conditions, which is one of the "hardest bones to crack". Foundation pit support is also a temporary measure project. After the basement is com...

Claims

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Application Information

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IPC IPC(8): E02D17/04E02D33/00G08B21/00
CPCE02D17/04E02D33/00E02D2600/10G08B21/00
Inventor 雷美清刘观仕褚为张先伟
Owner WUHAN ZHONGLI GEOTECHN ENG
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