CN201826333U - Soil-bag shock-absorption shock-isolation building foundation - Google Patents

Abstract

A geotechnical bag shock-absorbing and seismic-isolation building foundation is composed of a geotechnical bag, a geotechnical bag pier-shaped foundation, a geotechnical bag strip foundation, a geotechnical bag raft-shaped foundation, and a floor. 1. The sequence of the strip foundation under the wall and the raft foundation of the roof are stacked layer by layer under the floor in a criss-cross pattern; the gaps between the geotextile bags are filled and compacted; the floor is laid with reinforced concrete or other material protection layers, etc. When an earthquake occurs, seismic waves are reflected and refracted inside the geotechnical bag and between geotechnical bags; the expansion and contraction deformation of the bag and the frictional movement between soil particles inside the bag each consume seismic wave energy, and the frictional movement between geotechnical bags also consumes seismic wave energy , and because of the discontinuity between the geotechnical bags, it acts as a barrier to seismic waves. The method has good shock absorption and isolation effect, simple and economical construction, and has remarkable economic and social benefits.

Description

A geotechnical bag shock-absorbing shock-isolation building foundation

technical field

The utility model relates to a shock-absorbing and shock-isolation building foundation engineering, in particular to a geotechnical bag shock-absorbing and shock-isolation building foundation and its application.

Background technique

The seismic isolation and energy dissipation of existing buildings is basically to set a seismic isolation layer between the superstructure and the foundation of the building to prolong the natural vibration period of the entire structural system, increase the damping, and reduce the seismic energy input to the superstructure. Meet the expected shockproof requirements. At present, rubber shock-isolation bearings and damping devices are widely used at home and abroad. However, the vertical shock absorption effect of the above-mentioned shock-isolation and energy-dissipation shock-absorbing devices is not good enough, and the price is on the high side, so it is difficult to popularize and apply in ordinary buildings, especially in the construction foundations of middle and low-rise buildings in cities and towns.

Utility model content

The utility model overcomes the deficiencies in the prior art and provides a geotechnical bag shock-absorbing and shock-isolation building foundation and its application. While reinforcing the building foundation and improving the bearing capacity of the building foundation, it has the ability of energy dissipation, shock absorption and shock isolation . Moreover, the geotechnical bag is cheap, easy to construct, no special equipment is needed, and sometimes only manpower is enough. The material in the bag can be excavated soil or various construction waste slag, which can greatly save the shock absorption and isolation foundation of the house. construction funds.

The purpose of this utility model is achieved by the following technical solutions:

A geotechnical bag shock-absorbing and seismic-isolation building foundation, which is composed of a geotechnical bag 1, a geotechnical bag pier foundation 2, a geotechnical bag strip foundation 3, a geotechnical bag raft foundation 4, and a floor 5, and the building column 6 The order of setting geotechnical bag pier foundation 2 below the load-bearing wall, setting geotechnical bag strip foundation 3 under the load-bearing wall, and setting geotechnical bag raft foundation 4 on the entire foundation surface of the building is to use geotechnical bag 1 criss-cross to stack layer by layer. Under the ground 5, the gaps between the geotechnical bags 1 are filled with excavated soil from the site, and each layer of geotechnical bags is compacted mechanically or manually, and the top surface of the raft-shaped foundation is a concrete or reinforced concrete floor 5.

The application of the above-mentioned geotechnical bag shock-absorbing and seismic-isolation building foundation in the construction foundation of middle and low-rise buildings in cities and towns.

The principle of the utility model is: when an earthquake occurs, the seismic wave is reflected and refracted inside the geotechnical bag and between the geotechnical bags; the expansion and contraction deformation of the bag and the frictional movement between the soil particles inside the bag each consume the energy of the seismic wave and the energy between the geotechnical bags. Friction dislocation also consumes seismic wave energy, and because of the discontinuity between geotextile bags, it acts as a barrier to seismic waves. In order to enhance the shock absorption and isolation of the building structure, a composite structure of geotechnical bag pier foundation, geotechnical bag strip foundation and geotechnical bag raft foundation is adopted. When an earthquake occurs, the geotechnical bag shock-absorbing and isolation foundation blocks and consumes seismic energy, limits the transmission of vibration to the upper structure, reduces the input of earthquake motion to the structure, significantly reduces the seismic response of the upper structure, and reduces the swing of the building structure during an earthquake. And deformation, play the role of "overcoming rigidity with softness", thus ensuring the safety of buildings.

The utility model has the beneficial effects of good shock absorption and isolation effect, simple construction, capital saving and wide application range.

(1). Good shock absorption and isolation effect. On the basis of ensuring the bearing capacity of the foundation, the shock absorption and isolation effect is equivalent to that of general-purpose rubber isolation bearings and damping devices. Compared with the corresponding non-seismic isolation structure, the horizontal earthquake speed can be reduced to 1 of the non-seismic isolation structure. /2-1/12.

(2). Simple construction. The construction of geotechnical bags is simple. The foundation soil or building waste slag excavated on site can be directly put into woven bags to form geotechnical bags for use. When laying, they are placed in a criss-cross arrangement. Or building waste slag to fill, and then use rolling machinery to roll layer by layer.

(3). Save money. Directly put the on-site excavated soil or building waste slag into the woven bag, obtain local materials, turn waste into use, save resources, save energy and reduce emissions, which can greatly save the funds for building seismic isolation infrastructure.

(4). Wide range of application. It is suitable for shock absorption and isolation of middle and low-rise building foundations in cities and towns with different geology in different regions.

Description of drawings

Figure 1 Schematic diagram of the section structure of the foundation of a geotechnical bag shock-absorbing and seismic-isolation building;

Fig. 2 Schematic diagram of the plane layout of the geobag shock-absorbing and seismic-isolation building foundation.

Reference signs: 1: geotechnical bag; 2: geotechnical bag pier-shaped foundation; 3: geotechnical bag bar-shaped foundation; 4: geotechnical bag raft-shaped foundation; 5: floor, 6: building pillar.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail.

Example 1: A geotechnical bag shock-absorbing and seismic-isolation building foundation

Excavate a 1.2m×1.2m×1.2m foundation pit on the ground floor directly below the building pillars (50cm×50cm), arrange 40cm×40cm geotechnical bags in a criss-cross pattern and lay 8 layers, each layer is pressed by a roller compactor The gap between the solid and geotechnical bags is filled with excavated soil to form a pier-shaped foundation of geotechnical bags, and three layers of geotechnical bags are laid under the load-bearing wall of the building, arranged in a criss-cross manner and compacted to form a strip-shaped foundation of geotechnical bags. Lay 3 layers of geotechnical bags on the entire foundation surface of the building, arrange them in a criss-cross pattern and compact them to form a raft-shaped foundation of geotechnical bags, and pour a layer of reinforced concrete floor on the top surface of the raft-shaped foundation.

Embodiment 2: A construction method for a geotechnical bag shock-absorbing and seismic-isolation building foundation, its construction steps are as follows:

A. First put the foundation soil excavated from the construction site into a 40cm×40cm woven bag, and tie the bag mouth well to form a geotechnical bag for use;

B. Excavate a foundation pit with a depth of 1.2m×1.2m×1.2m under the building column according to the load on the upper part of the building and the foundation conditions, and compact the surface of the foundation pit with a rolling machine;

C. Place the geotechnical bags of step A layer by layer in the foundation pit in a criss-cross arrangement, and roll them layer by layer with a rolling machine, and fill the gaps between the geotechnical bags with the excavated foundation soil;

D. Construct layer by layer according to the method of step C, and lay 8 layers of geotechnical bags to form a geotechnical bag pier-shaped foundation;

E. After the foundation pit under the foundation column of the building is filled with geotechnical bags, lay 3 layers of geotechnical bags under the load-bearing wall of the building to form a strip foundation, and lay 2 layers of geotechnical bags on the entire foundation surface of the building to form a raft foundation. The construction of pier-shaped foundation and raft-shaped foundation is the same as that of geotechnical bag-shaped pier foundation;

F. Pouring a reinforced concrete protective layer on the top surface of the raft foundation to form a floor.

The geotechnical bag can be a woven bag with a planar size of 40cm×40cm to 100cm×100cm according to the needs of engineering construction.

Due to the composite structure of the geotechnical bag pier foundation, the geotechnical bag bar foundation and the geotechnical bag raft foundation, the shock absorption and shock isolation effect comparable to that of the general rubber shock-isolation bearing and the damping device can be achieved.

Claims (1)

1. a geotechnical bag shock-absorbing and seismic-isolation building foundation is characterized in that it is made of geotechnical bag (1), geotechnical bag pier foundation (2), geotechnical bag strip foundation (3), geotechnical bag raft foundation (4) ), the floor (5), the geotechnical bag pier foundation (2) is set under the building column (6), the geotechnical bag strip foundation (3) is set under the load-bearing wall and the entire foundation surface of the building The sequence of setting the geobag raft foundation (4) is to use geobags (1) to criss-cross and stack layer by layer under the floor (5), and fill the gaps between the geobags (1) with excavated soil from the site. The geotechnical bag is compacted mechanically or manually, and the top surface of the raft foundation is a concrete or reinforced concrete floor (5). the

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