Slanting construction trestle combined with internal supporting system

Abstract

The invention discloses a slanting construction trestle combined with an internal supporting system of a foundation pit. The slanting construction trestle is arranged between an upper support and a lower support, and a trestle wharf is arranged in the middle of the lower support at the same time. The slanting construction trestle is combined with the internal supporting system, column piles are used for vertical supporting and horizontal supporting, and shear walls or trusses are arranged between the supports and the trestle to reinforce the integrity of the trestle and the supports. By means of the slanting construction trestle, a construction channel from the ground to the inside of the foundation pit is established, an earth cutting machine can directly descend into the pit for earth cutting construction and transportation operation without limitation of the cutting depth of the foundation pit, and therefore the earth cutting efficiency is improved to a great extent; since the slanting construction trestle is combined with the internal supporting system, the lateral stability of the trestle is improved; moreover, the column piles of the supporting system are used for supporting the trestle vertically and horizontally, a supporting beam is used as a frame beam of the trestle, and therefore a large amount of engineering cost can be saved.

Description

technical field [0001] The invention relates to the field of building underground engineering, in particular to an oblique construction trestle combined with a supporting system in a foundation pit. Background technique [0002] The island excavation method of the foundation pit is an important method of earthwork excavation. Its advantage is that it can complete the excavation of the earthwork around the foundation pit and the construction of the support system in a relatively short period of time, which is more beneficial to the control of the uplift of the soil inside the foundation pit. There are two main methods of island excavation. One method is: the earthwork loading excavator works on the side of the foundation pit or on the trestle platform beside the foundation pit, and after the soil is taken, the earthwork is transported out by the earthwork truck beside the pit; the other way is: the earthwork loading excavator works on the island The top surface of the island...

AI Technical Summary

Problems solved by technology

However, the earthwork in the middle of the foundation pit must be transported to the side of the foundation pit by the excavator in the foundation pit several times. The loss of construction machinery is relatively large, and the excavation efficiency is low, especially for foundation pits with large excavation areas.

Using the second excavation method, the excavation efficiency is high and it is widely used, but it is limited by the excavation depth

It is generally required that the slope of the soil slope is not greater than 1:8. When the excavation depth is very deep, the required length of the soil slope is longer, and the excavation method of transporting earthwork through the soil slope cannot be implemented.

[0004] The construction trestle forms currently used mainly include horizontal trestles and independent oblique construction trestles. The former is limited by the excavation depth of the foundation pit. For foundation pits with deep excavation depths, it cannot meet the needs of earthmoving machinery to directly go down the pit for excavation construction. and transportation operations, the excavation efficiency is low; the latter is not combined with the support system, the lateral stability is poor, and additional trestle slab systems and column piles are required, and the project cost is high

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