Protection device and protection method for pouring for poured pile in cave stratum

A protection device and cast-in-situ pile technology, which is applied in sheet pile walls, buildings, and foundation structure engineering, can solve the problems of high material cost, large impact on construction progress, and long time-consuming, etc., and achieve simple operation, reduce construction difficulty, and save The effect of duration

Inactive Publication Date: 2017-05-31
CHINA FIRST METALLURGICAL GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above methods take a long time, the cost of materials is high, and the impact on the construction progress is relatively large.

Method used

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  • Protection device and protection method for pouring for poured pile in cave stratum
  • Protection device and protection method for pouring for poured pile in cave stratum
  • Protection device and protection method for pouring for poured pile in cave stratum

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0061] Implementation plan: when making a reinforcement cage, make and install a concrete protection device on the outer surface of the karst cave elevation area where the reinforcement cage is located, including a positioning hoop 7, an anti-concrete aggregate loss layer 4, an anti-concrete mortar loss layer, and a fixed layer 6. in:

[0062] Positioning hoop 7: two stiffening hoops 10cm larger than the diameter of the reinforcement cage (the steel bar type is the same as the designed reinforcement cage stiffening hoop);

[0063] Anti-concrete aggregate loss layer 4: three layers of geotextile wrapping;

[0064] Anti-concrete mortar loss layer 5: two layers of colored strip cloth wrapping;

[0065] Fixed layer 6: a layer of steel wire mesh (steel wire with a diameter of 4mm should be selected).

[0066] Working process: The present invention provides a protective device and method for pouring pile foundation concrete without filling the karst cave when karst caves are encou...

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Abstract

The invention discloses a protection device and a protection method for pouring for a poured pile in a cave stratum. In the protection device, two location hoops are sequentially arranged on the outer ring of a reinforcement cage in a sleeving manner in the length direction, the upper location hoop is higher than the top elevation of a cave, and the lower location hoop is lower than the bottom elevation of the cave; the outer ring of the reinforcement cage between the two location hoops is sequentially wrapped with a concrete aggregate loss prevention layer, a concrete mortar loss prevention layer and a fixing layer from inside to outside; and the two ends of each of the concrete aggregate loss prevention layer, the concrete mortar loss prevention layer and the fixing layer are connected with the two location hoops respectively. The protection device is capable of safely and effectively ensuring concrete pouring for a pile foundation in a cave area, convenient to construct, free from potential safety hazards, simple in structure, capable of realizing field material taking, easy to machine, simple to install, capable of saving the construction period, increasing the construction efficiency and lowering the construction difficulty, and high in safety factor.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a protective device and method for pouring cast-in-place piles in karst cave formations. Background technique [0002] At present, with the advancement of industrial technology and the expansion of engineering construction scale, pile foundation has become the most commonly used foundation form for high-rise or super high-rise buildings, railways, highways, bridges and other building structures. In the construction of underground pile foundations, it is not uncommon to encounter karst caves. Karst caves bring a lot of inconvenience to the construction process of pile foundation engineering, especially in the concrete pouring construction of pile foundation, in order to ensure the completion of the pouring target, the following methods are generally adopted: [0003] 1. Backfilling method: Backfilling with rubble or concrete. Due to the limitations of geological su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/60E02D27/32
CPCE02D5/60E02D27/32E02D2300/0075
Inventor 王博文覃遵义谢帮鹏
Owner CHINA FIRST METALLURGICAL GROUP
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