An externally expanded laminated excavation and bottom expansion foundation and its construction method
A construction method and basic technology, applied in the direction of basic structure engineering, construction, sheet pile walls, etc., can solve problems such as pit wall collapse, achieve the effects of reducing project cost, ensuring safety and stability, and reducing quality and safety accidents
Active Publication Date: 2018-06-19
ANHUI ELECTRIC POWER DESIGN INST CEEC
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Problems solved by technology
[0006] The purpose of the present invention is to solve the defect that the excavation and expansion foundation in the prior art is prone to pit wall collapse during the construction process, and to provide an external expansion laminated excavation and expansion foundation and its construction method to solve the above problems
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[0034] In order to have a further understanding and understanding of the structural features of the present invention and the achieved effects, the preferred embodiments and accompanying drawings are used for a detailed description, as follows:
[0035] Such as image 3 As shown, a kind of external expansion laminated excavation and bottom expansion foundation according to the present invention includes a column 1 and an expansion head 2, and the column 1 is installed above the expansion head 2 according to the prior art. The reinforcement cage 4 is inserted in the column 1 and the expansion head 2 and fixed by pouring concrete 5 to form a foundation.
[0036] Such as image 3 and Figure 6 As shown, the expansion head 2 includes an upper expansion head 21 and a lower expansion head 22, the upper expansion head 21 is obliquely installed on the lower expansion head 22, the upper expansion head 21 is an external expansion type on the basis of the lower expansion head 22, and t...
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The invention relates to an external expansion and lamination type digging and base-enlarging foundation and a construction method thereof. Compared with the prior art, the external expansion and lamination type digging and base-enlarging foundation and the construction method thereof disclosed by the invention solve the problem that pit walls have high probability of collapse in the construction process of the digging and base-enlarging foundation. An enlarged head of the external expansion and lamination type digging and base-enlarging foundation disclosed by the invention comprises an upper enlarged head and a lower enlarged head, wherein the upper enlarged head is obliquely mounted on the lower enlarged head; the outer wall of the lower enlarged head consists of a lower mortar layer and a lower brick layer which are sequentially arranged from outside to inside, the outer wall of the upper enlarged head consists of an upper mortar layer and an upper brick layer which are sequentially arranged from outside to inside, the upper mortar layer uses rock-soil mass on the outer side of the lower mortar layer as the slant gliding force exerting support, and the upper brick layer uses the jointing position of the lower mortar layer and the lower brick layer as slant gliding force exerting support. According to the external expansion and lamination type digging and base-enlarging foundation and the construction method thereof disclosed by the invention, the safety and the stability of the construction of the digging and base-enlarging foundation are guaranteed, the application range of the digging and base-enlarging foundation is extended, and the success rate of hole formation is guaranteed.
Description
technical field [0001] The invention relates to the technical field of transmission line tower foundations, in particular to an externally expanded and laminated excavated and bottom-expanded foundation and a construction method thereof. Background technique [0002] The force of the transmission line tower foundation has its own industry characteristics. During the operation, the tower foundation is not only affected by the downforce, but also by the two forces of uplift force and lateral bending moment. In the design work of the tower foundation, it is necessary to design a reasonable foundation form to provide a certain pull-out force while meeting the bearing capacity. Such as figure 1 As shown, digging and expanding the foundation of the bottom is one of the forms. [0003] Excavating and expanding the bottom foundation are widely used in high-voltage transmission line projects. The construction method is to directly dig (drill) the required foundation pit in the natu...
Claims
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IPC IPC(8): E02D27/42E02D5/34E02D5/44
CPCE02D5/34E02D5/44E02D27/42
Inventor 禹峰蓝天鹏黄兴怀胡孔飞何礼秋
Owner ANHUI ELECTRIC POWER DESIGN INST CEEC