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Tunnel shallow-buried excavation reserved core soil improved CRD construction method

A technology of reserving core soil and shallow burial and underground excavation, which is applied to tunnels, earthwork drilling, mining equipment, etc., can solve the problems of restricted construction period, low work efficiency, and small space for divided caverns, and achieve the effect of speeding up the construction progress

Active Publication Date: 2014-05-07
CHANGYE CONSTR GROUP
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Problems solved by technology

However, this method is generally only suitable for manual excavation due to the small space of the divided caverns during excavation. Mechanical construction is limited, and work efficiency is low, which seriously restricts the construction period.

Method used

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  • Tunnel shallow-buried excavation reserved core soil improved CRD construction method
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  • Tunnel shallow-buried excavation reserved core soil improved CRD construction method

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Embodiment Construction

[0036] Such as Figure 1 to Figure 13 As shown, in the present invention, the construction method of improving the CRD by reserving core soil for shallow buried tunnel excavation divides the entire tunnel section into four caverns with upper and lower steps and left and right for construction, specifically including the following steps:

[0037] The upper left step 1 and the upper right step 3 guide pit measurement and setting out → the arch portion is advanced with small conduit support → the left upper step 1 and the right upper step 3 are merged to excavate the pilot pit, slag is removed, and core soil 5 is reserved → left upper Construction of steel frame shotcrete anchor support 6 in the pilot pit arch part of step part 1 and upper right step part 3 → excavation of core soil 5 and slag removal → installation of temporary inverted arch 7 → upper center between left upper step part 1 and right upper step part 3 Construction of the partition wall 8 → measuring and setting ou...

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Abstract

The invention discloses a tunnel shallow-buried excavation reserved core soil improved CRD construction method. According to the tunnel shallow-buried excavation reserved core soil improved CRD construction method, a whole tunnel section is divided into an upper left step cavity, an upper right step cavity, a lower left step cavity and a lower right step cavity, the two upper step cavities are merged to enlarge the cavity space, an upper step is excavated with the core soil reservation method, an arch steel frame is formed immediately, then a temporary inverted arch is constructed, a ring is formed through fast sealing, and then a middle partition wall and the two lower step cavities are constructed properly according to the excavation process of all cavities. The tunnel shallow-buried excavation reserved core soil improved CRD construction method has the advantages that mechanical construction is facilitated, working efficiency is high, and the construction period is short.

Description

technical field [0001] The invention discloses a tunnel shallow buried excavation reserve core soil improvement CRD construction method, which belongs to the technical field of tunnel shallow buried excavation CRD construction method. Background technique [0002] In recent years, with the continuous progress and innovation of tunnel construction technology, many reliable and mature construction methods have emerged in tunnels crossing shallow buried excavation sites, and CRD method is one of them. However, this method is generally only suitable for manual excavation due to the small space of the divided cavern during excavation, and the mechanical construction is limited, and the work efficiency is low, which seriously restricts the construction period. Contents of the invention [0003] The object of the present invention is to provide a construction method for improving CRD with reserved core soil for shallow buried tunnel excavation, which is convenient for mechani...

Claims

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Application Information

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IPC IPC(8): E21D9/00
Inventor 唐振兴敖鹏康宝秦燕华沈建海
Owner CHANGYE CONSTR GROUP
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