Rapid pit-in-pit form erecting method in foundation slab of buried concrete structure
A technology for underground structures and base plates, applied to underwater structures, infrastructure engineering, buildings, etc., can solve the problems of cumbersome construction procedures and long construction periods, and achieve the goals of simplifying cumbersome construction procedures, saving costs, and shortening the precipitation cycle Effect
Active Publication Date: 2015-05-06
MCC5 GROUP SHANGHAI CORPORATION LIMITED
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Problems solved by technology
Although this construction method has the advantages of saving the amount of formwork, it still belongs to the category of traditional formwork, and there are still problems of cumbersome construction procedures and long construction period, and it is not suitable for high groundwater levels, long precipitation cycles or projects in In the rainy season and the construction period is tight, it is required to rush to rush the construction period of the project
[0005] Therefore, there are above-mentioned inconveniences and problems in the formwork construction method of the known pit-in-pit support system.
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Embodiment 1
[0030] The pit-in-pit rapid formwork method in the foundation floor of the underground concrete structure of the present invention comprises the following steps:
[0031] see now Figure 1 ~ Figure 3 , figure 1 It is a schematic plan view of a steel plate box according to an embodiment of the present invention, figure 2 for figure 1 A-A sectional view of, image 3 for figure 1 The B-B section view.
[0032] 1. The "steel box" is prefabricated, because the "steel box" is used as the outer template of the "pit in the pit", so the length and width of the "steel box" are equal to the design drawing size (net length) of the "pit in the pit" plus 2 times the thickness of the concrete (wall thickness), the height is equal to the depth of the "pit in the pit" plus a margin of about 200mm (because the thickness of the bottom layer of the underground structure is 100mm, an additional height margin is required to prevent the cement mortar from flowing into the cushion layer. For e...
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The invention relates to a rapid pit-in-pit form erecting method in a foundation slab of a buried concrete structure. The method is characterized by comprising the following steps: a, steel plate box prefabrication; b, pit digging for placing a steel plate box comprises the following steps of: (1) dewatering a foundation pit, digging to the elevation of a slab of the buried structure, and releasing a pit-in-pit normal control wire; (2) continuously digging deep to the bottom elevation of the pit-in-pit slab to form a pit for storing the steel plate box; (3) placing the steel plate box into the dug pit through a construction machinery; and (4) simultaneously pouring blinding concrete at the periphery of the steel plate box and the slab of the structure, so as to be closed as a whole and avoid inburst of muddy water and drift sand; and c, construction of pit-in-pit steel reinforced ribs and an internal temperate in the steel plate box, bonding the pit-in-pit steel reinforced ribs and the internal temperate with the steel reinforced ribs of the slab of the buried structure, and pouring concrete. The rapid pit-in-pit form erecting method in the foundation slab of the buried concrete structure has the advantages of simplifying the construction procedures, and being applicable to engineering with higher buried water level and longer rainfall period.
Description
technical field [0001] The invention relates to a formwork support method for the foundation floor of an underground concrete structure in construction engineering, in particular to a quick pit-in-pit formwork support method in the foundation floor of an underground concrete structure. Background technique [0002] Underground concrete structures usually have a buried depth of -4m to -7m, and some even reach -9m, such as underground cable tunnels and pipe galleries in the metallurgical industry. These underground structures are generally designed with sumps to solve drainage problems. The depth is more than 1200mm, and the size is about 2000x2000mm. Because the sump is nested in the foundation pit of the floor, it is commonly called "the pit in the pit". When the foundation of the underground structure is excavated to the floor level, it is necessary to excavate the sump in it. Because of the surge of groundwater, the construction of the "pit in the pit" is relatively diffic...
Claims
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IPC IPC(8): E02D29/045
Inventor 王亮王治军苏元洪周煜源
Owner MCC5 GROUP SHANGHAI CORPORATION LIMITED