WO2014000392A1

WO2014000392A1 - Earthquake-resistant high-rise building structure based on deep-hole, inverted t-shaped piles

Info

Publication number: WO2014000392A1
Application number: PCT/CN2012/086552
Authority: WO
Inventors: 李国忠
Original assignee: Li Guozhong
Priority date: 2012-06-29
Filing date: 2012-12-13
Publication date: 2014-01-03
Also published as: CN102720218A

Abstract

Disclosed is an earthquake-resistant high-rise building structure based on deep-hole, inverted T-shaped piles, wherein a full slab foundation (2) is supported on lower bored concrete piles, underground and surface buildings are successively constructed on the full slab foundation (2), the lower bored concrete piles are deep-hole, inverted T-shaped piles (10), and a pile bottom shock isolation pad (11) is arranged between the pile base and the ground. The structure can increase the earthquake resistance capacity of the building.

Description

High-rise seismic building structure based on deep hole inverted τ type pile

The invention relates to the field of building structures, in particular to a high-rise seismic building structure based on deep-hole inverted τ-type piles.

Background technique

Earthquake resistance is an important indicator of building structure, and the existing building structure is basically based on

The National Building Standard Design Atlas - 10SG813--Reinforced Concrete Grouting Pile is constructed. At the project site, pile holes are formed in the foundation soil by mechanical drilling, steel pipe compaction or manual excavation, and steel bars are placed in it. The cage, after the concrete is solidified, forms a pile. The slab foundation of 1. 5 m thick is poured on the top surface of the cast-in-place pile with a diameter of 0.8 m. 2. Then, the basement 3, the first floor 4 and the upper floor 5 are sequentially constructed on the entire foundation 2. The cast-in-situ pile 1 is usually drilled with a constant-diameter drill bit, so the diameter of the pile after the infusion is also uniform, since the diameter cannot be too thick, and the load per unit area is safe, and the cast-in-place pile mainly depends on the circumference. The frictional force of the surface friction is the load-bearing friction pile, so each pile has limited load. For larger buildings, the number of piles needs to be increased a lot, and the construction period and cost are significantly increased. Moreover, after drilling, the inverted conical surface of the drill tip is naturally left at the bottom of the hole, and the bottom surface of the pile after the pouring is also formed with a pointed cone. Although the taper is relatively large, the building load of the heavy load for a long time, the pile The bottom will squeeze and destroy the foundation, and the subsidence will occur, and the surface building will crack and crack, which will seriously affect the safety of the building. The inventor in the Chinese patent "CN201120109336. 3 - dedicated deep inverted T-type pile drill", «CN201110093580. X deep inverted T-piling casting method" and international application "PCT/CN2012/071523 deep hole inverted T-piling In the Drill Bit and Forming Method, a novel special drill bit is proposed to machine the deep hole of the inverted T-pillar, and the pre-embedded part of the frustum shape is used to skillfully solve the problem of the flaring of the bottom end of the steel cage, thereby forming The concrete inverted T-pillar with the steel frame has greatly improved the bearing capacity of the pile, saving material cost and construction cost. However, the above structure has room for further improvement in the earthquake resistance of the building.

Summary of the invention

In view of the shortcomings of the above-mentioned existing reinforced concrete equal-diameter piles, the present applicant provides a high-rise seismic building structure based on deep-hole inverted T-piles with reasonable structure, which can effectively improve the bearing capacity and seismic capacity of the building. And significantly reduce construction costs.

The technical solutions adopted by the present invention are as follows:

A high-rise seismic building structure based on deep-hole inverted τ-type piles, the whole plate foundation is supported by the lower pouring piles, and the underground and ground buildings are sequentially constructed on the whole plate foundation, and the pouring piles are deep-hole inverted τ-type piles, piles A pile bottom isolation pad is arranged between the foot and the foundation.

As a further improvement of the above technical solution, a base isolation pad is laid between the whole board foundation and the foundation.

The pile bottom isolation pad and the base isolation pad are filled with an elastomer filler, and the thickness of the pile bottom isolation pad and the base isolation pad is 40 to 70 cm.

The elastomeric filler is a comminuted strip of used tires. The underground and ground buildings include a basement, a first floor and a high floor.

A plurality of triangular cones are arranged on the straight hole wall of the inverted τ type pile.

The lateral bottom of the building structure is provided with a transverse beam lower than the whole plate foundation, and a diagonal beam which is obliquely supported between the horizontal beam and the bottom surface of the first layer, and the bottom of the horizontal beam is also supported on the inverted t-type pile, and the transverse beam is The bottom surface is provided with a base isolation pad of 40 to 70 cm thick.

The beneficial effects of the present invention are as follows:

The invention is constructed based on deep-hole inverted T-piles, which effectively improves the bearing capacity of single-piled piles, and can greatly reduce the number of piles and construction cost. The invention has a pile bottom isolation pad at the bottom of the inverted T-piling, and a base isolation pad is arranged under the whole plate foundation, and the soft cushion under the rigid structure absorbs the earthquake vibration, which can effectively achieve earthquake resistance and improve the building. Its seismic capacity ensures the safety of residents in disasters.

DRAWINGS

Figure 1 shows the existing common building structure.

Figure 2 is a seismic building structure of the present invention.

Figure 3 is an enlarged view of a portion A in Figure 2.

Figure 4 is an optimized embodiment of the present invention.

In the figure: 1. Equal-diameter pouring pile; 2. Whole board foundation; 3. Basement; 4. First floor; 5. High-rise; 10. Inverted T-pillar; 1 1. Pile bottom isolation pad; 13, concrete; 14, steel cage; 15, pre-embedded frustum; 16, base isolation pad; 17, horizontal beam; 18, oblique beam.

detailed description

Specific embodiments of the present invention will be described below with reference to the accompanying drawings. As shown in FIG. 2, the high-rise seismic building structure based on the deep-hole inverted T-piling according to the present invention is based on the deepening of the international application "PCT/CN2012/071523 - Dedicated drill bit and forming method for deep-hole inverted T-piles" The inverted inverted T-pillar 10 is constructed. Since the inverted T-shaped pile 10 is mainly supported by the bottom of the larger diameter of the bottom, the bearing capacity is greatly improved, and the same is a 30-story high-rise structure with a total height of 88 m and a width of 13.3 m. 4米厚, and then on the whole board base 2, in turn, only 70 intermediate inverted aperture 0. 8m, expanded bottom aperture 1. 6m inverted T-type pile 10, the entire surface of the top surface of the casting 2 need only 0. 4 meters thick, and then on the whole board base 2 Construction of the basement 3, the first floor 4 and the upper level 5. In actual operation, the present invention first uses a special drill bit to form a plurality of inverted T-shaped pile holes; of course, the tool can be expanded in the middle of the straight hole to form a "sugar gourd string" as shown in the middle pile of Fig. 2. A plurality of triangular cones 12 are used to further increase the load carrying capacity of the pile. In the second step, a pile bottom isolation pad 11 is disposed between the pile leg of the inverted T-type pile hole and the foundation, and the thickness of the pile bottom isolation pad 11 is 40 to 70 cm, and an elastomer filler such as rubber is used, for example, crushing of used tires. Strips, filled. In the third step, the steel cage 14 and the pre-embedded frustum 15 are placed into the pile hole, and the bottom of the prefabricated frustum 15 contacts the pile bottom isolation pad 1 1 and then stops and flares the mouth of the steel cage 14 . In the fourth step, the concrete 13 is poured, and the pile bottom isolation pad 1 1 is compacted by the weight of the entire pile. For the same reason, before the pouring of the whole board foundation 2, the base isolation pad 16 is laid under the whole board foundation 2 with the elastomer filler, and the thickness of the base isolation pad 16 is usually set to 40~70 cm, and the upper foundation and the building are utilized. The weight is compacted.

Figure 4 is an optimized embodiment of the present invention, on the side of the building, a transverse beam 17 below the full-plate foundation 2, and a diagonal beam 18 extending between the transverse beam 17 and the bottom surface of the first layer 4, transverse The bottom of the girders 17 is also supported on the inverted T-pillar 10 and on the underside of the transverse beam 17 A base isolation pad 16 having a thickness of 40 to 70 cm is provided.

The invention is constructed based on deep-hole inverted T-piling, which significantly improves the bearing capacity of the single-piled pile, can increase the bearing capacity of 6~8 times, thereby greatly reducing the number of piles and the construction cost, and can be reduced according to calculations. The total cost of the building is 5% to 8%. The invention provides a pile bottom isolation pad between the inverted T-shaped pile foot and the foundation, and a basic isolation pad is arranged between the whole board foundation and the foundation, and the vibration shock to the seismic wave is absorbed by the soft cushion under the rigid structure. It can effectively achieve earthquake resistance, improve the earthquake resistance of buildings, and protect the lives of residents in disasters. According to theoretical calculations, the present invention can improve the seismic level of the third level. For a 200-meter-high building, it can achieve a nine-order earthquake without damage (the wall surface is free from cracks), and the ten-order earthquake does not damage (the main structure is not large). The effect of cracks, no inclination). Since the existing first-class seismic structure needs to increase the engineering cost by at least 10% in the existing building structure, the present invention can generally reduce the engineering cost by 20% to 25%.

The above description is intended to be illustrative of the invention, and is not intended to limit the scope of the invention, and the scope of the invention is defined by the scope of the invention, and the invention may be modified in any form without departing from the spirit of the invention.

Claims

Claim

1. A high-rise seismic building structure based on deep-hole inverted T-piles, the whole plate foundation (2) is supported by the lower pouring piles, and the underground and ground buildings are sequentially constructed on the whole plate foundation (2), which is characterized by: The pouring pile is a deep hole inverted T-shaped pile (10), and a pile bottom isolation pad (11) is arranged between the pile foot and the foundation.

2. The high-rise seismic building structure based on deep-hole inverted T-piling according to claim 1, characterized in that: a base isolation pad (16) is laid between the whole plate foundation (2) and the foundation.

3. The high-rise seismic building structure based on deep-hole inverted T-piling according to claim 1 or claim 2, wherein: the pile bottom isolation pad (11) and the base isolation pad (16) are elastic The bulk filler is filled, and the thickness of the pile bottom isolation pad (11) and the base isolation pad (16) is 40 to 70 cm.

4. The high-rise seismic building structure based on deep-hole inverted T-piling according to claim 3, wherein: the elastomer filler is a pulverized strip of used tires.

The high-rise seismic building structure based on deep-hole inverted T-piling according to claim 1, characterized in that: the underground and ground building comprises a basement (3), a first floor (4) and a high floor (5).

6. The high-rise seismic building structure based on deep-hole inverted T-piling according to claim 1, wherein: the inverted T-shaped pile has a plurality of triangular cones (12) disposed on the wall of the straight hole.

7. The high-rise seismic building structure based on deep-hole inverted T-piling according to claim 1, wherein: the lateral bottom of the building structure is provided with a transverse beam (17) lower than the entire foundation (2), and Oblique girders (18) erected between the transverse beam (17) and the bottom of the first layer (4), transverse girders

(17) The bottom is also supported on the inverted T-pillar (10), and a 40 to 70 cm thick base isolation pad (16) is placed on the bottom surface of the transverse beam (17).