Construction Method for Butt Jointing of Steel Pipe Jacking on Submarine River

Abstract

The invention discloses a river and sea bottom steel jacking pipe butt joint construction method. The method includes: for soil in a butt joint region, on the basis of taking a simple reinforcement measure of high-pressure spiral jet grouting used in land and underground jacking pipe butt joint, assisting with double-liquid grouting water stoppage and leaking stoppage measures so as to realize soil reinforcement with the main purpose of water stoppage; arranging a first temporary steel-structure external formwork support water stopping ring; transporting a reelpipe to the butt joint region in a divisional manner prior to assembling and welding, and finally finishing large-diameter steel jacking pipe butt joint in the sea bottom environment. By the method, not only can the requirements on tool pipe butt joint under complicated and restricted conditions that steel jacking pipe butt joint positions are all located in extremely-soft sandy soil layers of the sea bottom and drift sand and water leakage are easily caused under the impact of tides be met, but also the requirement for shortening long-distance jacking pipe construction period can be met. The key water stoppage problem which needs to be solved in jacking pipe butt joint construction in the soft sandy soil layers of the sea bottom is solved, engineering cost and risk are low, and the method has broad market prospect.

Description

technical field [0001] The invention relates to a construction method for steel pipe jacking, in particular to a construction method used in underwater pipe jacking projects such as rivers, lakes, seas, etc., which can solve extremely soft sandy soil layers at the bottom of the water, or be affected by tides at the butt joint position of pipe jacking. It is very easy to produce quicksand and water leakage and other complex or restricted steel pipe jacking construction methods. Background technique [0002] As a non-excavation tunnel construction technology, pipe jacking technology can cross roads, rivers or ground buildings. With the rapid development of urban construction, pipe jacking technology has been widely used in transportation, energy, electricity, drainage and other fields due to its advantages such as wide application range of soil layers, little disturbance to soil, and no impact on ground transportation. Compared with concrete pipe jacking, steel pipe jacking h...

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Problems solved by technology

[0006] What the present invention aims to solve is that in the construction of steel pipe jacking projects under the seabed environment, the butt joint positions of pipe jacking are all in the extremely soft sandy soil layer in seawater, and the complex and limited problems of quicksand and water leakage are easily produced due to the influence of tides. However, it provides a construction method suitable for butt jointing of large-diameter steel pipe jacking under seabed conditions.

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