Super high-rise building foundation raft construction method

A foundation raft and construction method technology, which is applied in the direction of basic structure engineering, construction, excavation, etc., can solve the problems of low standardization, impact on construction period, lack of unified and effective water retaining means, etc.

Pending Publication Date: 2021-09-07
CHINA RAILWAY CONSTR ENG GROUP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, there is no uniform and effective water retaining means for water storage and maintenance. Different water retainin

Method used

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  • Super high-rise building foundation raft construction method
  • Super high-rise building foundation raft construction method
  • Super high-rise building foundation raft construction method

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Embodiment Construction

[0041] Such as figure 1 As shown, the concrete steps of the foundation raft construction method of this super high-rise building provided by this embodiment are as follows.

[0042] The first step is to excavate the foundation pit and support it. Take Shandong Rizhao Haiyun Plaza as an example. The plane size of the foundation raft in this project is 62*55 meters, and the thickness is 4.2 meters. The height difference between the inner part of the foundation pit and the ground is 3.6 meters, and the height difference between it and the auxiliary road of Qingdao Road is about 18 meters. The total volume of concrete is 16,000 cubic meters.

[0043] The second step is to set the main chute and the auxiliary chute, the main chute is connected with the center of the foundation pit, and the auxiliary chute is arranged in the foundation pit. Since the highest difference occurs at the auxiliary road of Qingdao Road, the main chute is set from the auxiliary road of Qingdao Road to t...

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Abstract

The invention provides a super high-rise building foundation raft construction method. The super high-rise building foundation raft construction method comprises the steps that a foundation pit is excavated and supported, then a main chute and an auxiliary chute are arranged, the main chute communicates with the center of the foundation pit, the auxiliary chute is arranged in the foundation pit, then a formwork is erected, a temperature control system is preset in the foundation pit, and the temperature control system comprises a temperature monitoring device, water circulation and a plurality of temperature adjusting units. The water circulation supplies water to the temperature adjusting units, cooling water input into the temperature adjusting units through the water circulation is adjustable in a single point mode, then concrete is poured into the center of the foundation pit from the main chute, the concrete is annularly diffused to the periphery and poured in a layered mode, a formwork hanging area is poured through an automobile pump, film covering is conducted after initial setting, finally, a water retaining device is arranged on the periphery of the foundation pit, and water is injected into the water retaining device. And storing water and maintaining. The water circulation determines whether to input the cooling water to each temperature adjusting unit or not according to the internal temperature condition, the cooling water input at each point is independently controllable, temperature difference can be better reduced, temperature stress can be better controlled, finally water storage maintenance is carried out, and therefore generation of harmful cracks is reduced.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a construction method for super high-rise building foundation rafts. Background technique [0002] During the construction process of super high-rise buildings, the foundation is mostly mass concrete. During the mass concrete pouring process, due to the influence of hydration heat and internal and external temperature differences, temperature stress is formed, and harmful cracks often appear, and even lead to obvious cracking of mass concrete. , seriously affect the structural safety and functionality, and affect the overall performance. At present, pre-embedded cooling water pipes are a common and effective method, but there is no real-time and effective monitoring of the internal concrete temperature, and it is also impossible to perform single-point control of the cooling water flow into each temperature control pipe, making it difficult to perform local temperat...

Claims

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Application Information

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IPC IPC(8): E02D27/01E02D17/04E02D15/02C04B40/00
CPCE02D27/01E02D17/04E02D15/02E02D27/013C04B40/0075
Inventor 徐洪祥刘宝民岳明华单洪帆张积安周东任哲陈义鹏
Owner CHINA RAILWAY CONSTR ENG GROUP
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