Assembly type recyclable pipe jacking working well and construction technology thereof

Abstract

The invention provides an assembly type recyclable pipe jacking working well. The assembly type recyclable pipe jacking working well comprises a circular working well main body, wherein the circular working well main body comprises a concrete blade foot assembly and a plurality of steel side wall assemblies which are stacked on the concrete blade foot assembly layer by layer from bottom to top; each steel side wall assembly is formed by splicing a plurality of steel side wall units through bolts in the circumferential direction; and the concrete blade foot assembly is formed by splicing a plurality of concrete blade foot units through door-shaped ribs in the circumferential direction. The construction process of the assembly type recyclable pipe jacking working well is assembly from bottomto top. Compared with the prior art, the assembly type recyclable pipe jacking working well has the beneficial effects that the assembly degree is high; the unit adaptability is high, the pipe jacking hole opening position in the well is flexible, the connecting mode is simple, the soil body supporting effect is good, and the safety is easier to guarantee; the resource utilization rate is high, and after construction is finished, all the steel side wall units can be recycled; and after temporary recycling of construction, the soil body in a working area is recovered as much as possible, and the underground environment is protected.

Description

technical field [0001] The invention relates to the technical field of pipe jacking well construction, in particular to an assembled recoverable pipe jacking well and its construction technology. Background technique [0002] At present, in urban municipal engineering, due to the limited environmental conditions, non-excavation pipe jacking construction operations are mostly used. The commonly used methods of pipe jacking work wells include reverse arch wall method, reinforced concrete caissons cast in place layer by layer , simple steel cylinder, steel plate (section steel) pile enclosure structure, etc., the specific methods are as follows: [0003] 1. Reverse arch wall method: The technical principle is to construct the support structure layer by layer from top to bottom, that is, dig a layer of earthwork from top to bottom along the excavation line of the working well, and then use the side wall of the excavation surface as the outer formwork , Binding steel bars, erect...

AI Technical Summary

Problems solved by technology

Disadvantages: 1. On-site production of steel bars and supporting formwork requires a lot of labor hours; 2. After the concrete reaches a certain strength, the enclosure structure can be formed to meet the construction requirements of the lower layer, and the construction period is long; 3. The construction quality of the temporary structure is difficult to control ;4. After the construction is completed, the supporting structure is buried underground as a permanent concrete structure, which wastes resources

Disadvantages: 1. The production cycle of the reinforced concrete structure produced on site is long; 2. The construction is more complicated, consumes more formwork, and the construction cost is high; 3. The concrete is easy to crack when it sinks unbalanced, causing local damage to the structure; 4. Work before pipe jacking The well needs to be drilled twice; 5. The structure of the pipe wall creates inconvenience to the subsequent underground construction at this place

[0006] 4. Steel plate (section steel) pile enclosure structure: This method is to use the support structure in the foundation pit project as the working well for pipe jacking, which is not a typical pipe jacking construction method, because the pipe jacking needs to open holes, and the steel plate The pile enclosure structure needs to be in a closed state. The two are contradictory. When opening holes, the treatment is often not standardized, and the soil may be in an unsupported state, which poses a safety risk.

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