Seismic-resistant-columned rock bolt foundation with enlarged toe and construction method of seismic-resistant-columned rock bolt foundation with enlarged toe

A technology of rock bolts and anti-seismic columns, which is applied in basic structure engineering, construction, sheet pile walls, etc., can solve the problems of large engineering volume, large labor and material consumption, and high cost, and achieves reduction of excavation costs, simple construction, and increased cost. Great anti-pull effect

Inactive Publication Date: 2012-07-11
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above-mentioned deficiencies in the prior art, the present invention solves the problems of large amount of work, large consumption of manpower and material resources, and high cost in building pil

Method used

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  • Seismic-resistant-columned rock bolt foundation with enlarged toe and construction method of seismic-resistant-columned rock bolt foundation with enlarged toe
  • Seismic-resistant-columned rock bolt foundation with enlarged toe and construction method of seismic-resistant-columned rock bolt foundation with enlarged toe
  • Seismic-resistant-columned rock bolt foundation with enlarged toe and construction method of seismic-resistant-columned rock bolt foundation with enlarged toe

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Experimental program
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Effect test

Embodiment 1

[0025] Embodiment 1: see figure 1 with figure 2 , an anti-seismic column rock bolt foundation with expanded bottom, comprising a vertical columnar foundation body 1, the lower part of the columnar foundation body 1 is embedded in bedrock 3, and its bottom is an enlarged part; generally the diameter of the columnar foundation body is not Less than 0.9m (non-expanded part), it is convenient for workers to expand and excavate the bottom of the columnar foundation body during construction; The columnar reinforcement cages in the body intersect or are adjacent to each other, and the lower end is anchored in the bedrock; the columnar foundation body is integrally poured with concrete original grooves and anchored in the bedrock; the reinforcement cage is composed of several longitudinal bars 4 and stirrups 5 . Generally, the length of the columnar body embedded in the bedrock is 1 to 3 times the length or diameter of the cross-section of the columnar foundation body (non-expanded ...

Embodiment 2

[0029] Example 2: see image 3 with Figure 4 , different from Embodiment 1, the bottom of the columnar foundation body 1 is a columnar enlarged part, and according to the actual situation, only the bottom of the columnar foundation body 1 is embedded in the bedrock 3 . In this way, the excavation is convenient, and the excavation volume can be further reduced, thereby reducing labor intensity and saving manpower and material resources. It is suitable for the case where the load borne by the columnar foundation body and its cross-sectional size are small.

[0030] The construction method of the anti-seismic column rock bolt foundation with expanded bottom comprises the following steps:

[0031] 1) Foundation pit excavation:

[0032] When the load on the column and its cross-sectional size are large, the foundation pit for pouring the columnar foundation body shall be excavated first on the bedrock. The bottom of the columnar foundation body is enlarged. The length of the c...

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Abstract

The invention provides a seismic-resistant-columned rock bolt foundation with an enlarged toe and a construction method of the seismic-resistant-columned rock bolt foundation with the enlarged toe. The seismic-resistant-columned rock bolt foundation comprises a vertical cylindrical foundation body, the vertical cylindrical foundation body is equal to an upper seismic-resistance column in cross sectional size, and the cylindrical foundation body is inlaid in bed rock and provided with an enlarged bottom. The enlarged bottom is provided with a plurality of radial anchor bolts, and the cylindrical foundation body and the bed rock are anchored integrally with concrete by in-trench placement. Excavated volume of the rock foundation can be reduced effectively, the problems of large project amount, high manpower and material consumption and high cost are solved, and excavation cost is lowered greatly. The foundation is reliably connected with the bed rock by bottom enlargement and radial distribution of anchor bolts, connection of the column with the bed rock is enhanced effectively, extraction resistance, shear resistance, compression resistance and antidumping bearing capacity of the foundation are enhanced, horizontal or vertical displacement or separation between the column bottom and the bed rock in a high earthquake intensity area under the action of earthquake when an earthquake occurs is avoided, and seismic resistance of a building on the rock foundation is improved effectively.

Description

technical field [0001] The invention relates to a rock foundation, in particular to an anti-seismic column rock bolt foundation with expanded bottom and a construction method thereof. [0002] Background technique [0003] In high-intensity earthquake areas, people usually choose to build buildings on places with high geological hardness or on rocks, and building construction on rocks with high geological hardness is very inconvenient for large-scale excavation of traditional column foundations. Large amount, difficult construction, consuming manpower and material resources, and not fully relying on the bedrock to deeply excavate its comprehensive bearing capacity, cannot fully meet the seismic requirements. Thereby people choose to dig holes before building the building, then pour the pile foundation, then build the main support of the building on the pile foundation and live etc. However, the traditional pile foundation is generally a columnar foundation, which only depe...

Claims

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Application Information

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IPC IPC(8): E02D27/12E02D27/34E02D27/50E02D5/74
Inventor 曾祥勇杨帅军彭川海
Owner CHONGQING UNIV
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