Construction method for underground structure through half reverse course of action of inverting connection

A technology of reverse connection and construction method, which is applied to underwater structures, infrastructure engineering, artificial islands, etc., can solve the problems of difficult reinforcement treatment in construction joints, water seepage in construction joints, high treatment costs, etc., and achieve extensive economic benefits and social benefits. Benefits, convenient construction, and the effect of saving engineering investment

Active Publication Date: 2005-01-12
CHINA MCC20 GRP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the reverse method used today has the following problems: 1. Due to the uneven settlement of the new concrete poured from the second section under the action of its own weight, water seepage and water leakage will occur in the construction joints. There are no specific measures for the construction joint treatment of the reverse method, and only steel waterstops or rubber waterstops can be installed at the construction joints after pouring to deal with water seepage and leakage; 2. It is difficult to deal with the steel bars in the construction joints, and the treatment cost is relatively high ; 3. It is necessary to chisel out the structural concrete in a large area before pouring again

Method used

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  • Construction method for underground structure through half reverse course of action of inverting connection
  • Construction method for underground structure through half reverse course of action of inverting connection

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Example 1: A circular underground structure with a depth of -32.75m and a diameter of 18.57m on a soft soil foundation is surrounded by an underground diaphragm wall at a depth of -44.55m. Segmented semi-reverse construction method reverse connection construction method. The vertical reinforcement of the segmental semi-reversed sand tank joints is connected by spot welding and binding, and the segmental reverse sand tank joints are of tenon structure (depth 1.40m, width 1.5m, wooden 80mm*100mm tenon and groove, medium coarse sand Layer-by-layer compaction), 5-8m section reverse earthwork excavation, 300-500mm layered sand filling and compaction, 20 vertical reinforcement, pouring 80-100mm mortar cushion, wooden tenon and groove positioning, horizontal steel bar binding For construction, a 600*400mm door hole is reserved for formwork construction, and the 1200mm*300mm waist ring beam of the beam-slab structure is used to act as a false corbel, and the concrete is poured...

Embodiment 2

[0031] Example 2: A circular underground structure with a depth of -29.5m and a diameter of 14.5m on a soft soil foundation is surrounded by an underground diaphragm wall at a depth of -41.5m. Construction method of segmented reverse sand tank joint. Spot welding and binding are selected for the vertical steel bars of the joints of subsection reverse sand grooves, and the tenon structure of the subsection reverse sand groove joints (depth 1.40m, width 1.5m, wooden 80mm*100mm tenon and groove, medium coarse sand Layer tamping), 5-10m section reverse earthwork excavation, 300-500mm layered sand filling and tamping, 20 vertical reinforcement, pouring 80-100mm concrete cushion, wooden tenon and groove positioning, template construction reservation 600*400mm door hole, using the 1100mm*300mm waist ring beam of the beam-slab structure to act as a false corbel, and the 500-600mm concrete is poured in layers. Implementation effect: There are no harmful cracks in the construction joi...

Embodiment 3

[0032] Example 3: A circular underground structure with a depth of -33.0m and a diameter of 28.1m on a soft soil foundation is surrounded by an underground diaphragm wall at a depth of -53.0m. Construction method of segmented reverse sand tank joint. Spot welding and binding are selected for the vertical steel bars of the sand groove joints of subsections, and the tenon structure of the joints of sand grooves is reversed in sections (depth 1.60m, width 0.8-1.6m, wooden 100mm*100mm tenon and groove, medium thick Sand layered and compacted), 5-8m segmental reverse earthwork excavation, 300-500mm layered sand filling and compaction, 25 vertical reinforcement, pouring 80-100mm concrete or 100mm sand cushion, wooden tongue and groove positioning , leave 600*400mm door holes for formwork construction, set 400mm*700mm false corbels, and pour concrete in layers of 500-600mm. Implementation effect: There are no harmful cracks in the construction joints of the semi-reverse constructio...

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Abstract

This is a constructive method used to underground; it is a semi-reverse practice inverse join method. Its steps are: After dig earthwork set up the safe guard wall (1) and according following steps: To make temporary sand trough joint (2), it is composed by the wedge trough (3), pad layer (4) and filled layer (5), on the sand trough joint (2) install pattern plate (10), vertical direction reinforcing rod (6), and horizontal direction reinforcing rod (11), to fix the pattern plate by the scaffold, on the pattern plate surface open a pair holes, one end is fixed on the safeguard wall, other end is fixed on the scaffold by binder bolt (7); support rod (9) sustain the scaffold; on the pattern-plate top end, to make 'false cattle-leg' pouring opening, to pour cement slurry: after pouring cement begin to maintain, after maintain dismantle pattern plate and repeat the above steps to the bottom.

Description

technical field [0001] The invention relates to a reverse connection construction method of an underground structure semi-reversed method in the civil engineering industry. Background technique [0002] With the continuous development of municipal construction and other infrastructure construction, people pay more and more attention to the development and utilization of underground space. As a result, there are more and more underground construction projects in complex environments, and the difficulty of design and construction is also increasing. Big. At present, the construction of underground engineering mostly adopts two methods: forward method or reverse method. Since the construction of the straight method is subject to many restrictions, mainly referring to the limitation of environmental conditions, if the construction site is a soft foundation or the foundation construction requirements are relatively deep, the straight method is seldom used, because the use of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D29/045E04B1/35
Inventor 秦夏强王英俊白艳霞杨勇李炳伟谢非祃丽婷魏宏超
Owner CHINA MCC20 GRP CORP
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