Ultra-long harbor basin slope excavation construction method
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A construction method and slope technology, applied in water conservancy projects, marine engineering, earth movers/shovels, etc., can solve problems such as easy formation of over-excavation, increased construction costs, safety accidents, etc. The effect of construction safety and productivity improvement
Active Publication Date: 2017-01-11
CCCC TIANJIN DREDGING HARBOR CONSTR ENG
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Problems solved by technology
[0010] 1. Over-excavation, on the one hand, will cause unnecessary waste and affect the production efficiency of the construction ship;
[0011] 2. In special areas, such as revetments, docks, breakwaters and other buildings near slopes, excessive excavation may endanger the safety of buildings and cause safety accidents
[0012] 3. If there is too much under-excavation, it is necessary to move or adjust the ship for secondary excavation, which not only reduces the production efficiency of the construction ship, but also increases the construction cost. After the secondary excavation, it is easy to form over-excavation
[0013] 4. In the construction operation of cutter suction ship, the depth and smoothness quality of the excavation groove are generally easier to control, and most of the construction quality problems that arise are concentrated in the slope excavation area
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Embodiment 1
[0052] Example 1, see Figure 1 to Figure 4 According to the characteristics of the main construction task of the excavation of the ultra-long harbor basin with relatively regular slope surface, the main construction task is to clean up the slope surface and sweep the area shallowly. After digging the slope surface, divide the width of the remaining groove into strips after completion, and clean the groove one by one. Specifically include the following steps:
[0053] 1) Before the formal construction, carry out sea-sweeping survey on the existing mud extraction area, especially the slope area, and sort out the accurate water depth map of the slope excavation area;
[0054] 2) Analyze the water depth of all slope excavation areas, and formulate the slope excavation process; select the slope hob excavation method for excavation according to the actual situation of the slope, mainly adopt the following process:
[0055] 2.1) Divide the construction strips according to the slop...
Embodiment 2
[0068] Example 2, see Figure 5 , in view of the large amount of soil on the slope surface, the thickness of the mud layer is 4-8 meters, and the construction technology adopted for the excavation of the ultra-long harbor basin slope with shallow areas locally is a step-by-layer excavation process; firstly, according to the characteristics of the mud Divide the slope surface into steps, and excavate the side slope with the overhang and the undercut, so that the earth will naturally collapse to form a slope, and the groove and the side slope will be constructed sequentially in strips and layers; the main process is as follows: including the following steps:
[0069] 1) Before the formal construction, carry out sea-sweeping survey on the existing mud extraction area, especially the slope area, and sort out the accurate water depth map of the slope excavation area;
[0070] 2), analyze the water depth of all slope excavation areas, and formulate the slope excavation process; sele...
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Abstract
The invention relates to an ultra-long harbor basin slope excavation construction method. The method comprises the following steps that 1, sweeping measurement is carried out on an existing mud taking-out area, particularly a slope area before formal construction, and an accurate slope excavation area bathymetric chart is sorted out; 2, the water depths of all slope excavation areas are analyzed, and a slope excavation process is made; according to the practical situation of the slope, two slope construction processes are made for regularity or irregularity of the slope for on-site construction, and the two slope construction processes comprise a slope hob excavation method and a layered excavation method; 3, the slope to which the two processes are applicable is scientifically and approximately divided into a plurality of areas to which different processes are applicable; 4, the subsection construction situation of each process is reasonably divided according to the width of each section of slope; and 5, different slope excavation construction processes are adopted in different areas through on-site organization for organizing on-site construction. According to the slope excavation scheme with on-site operability, on the basis of the original production rate, the production rate is improved by 20% or above on the premise that the time-benefit rate is not changed.
Description
technical field [0001] The invention belongs to the technical field of dredging and dredging, and in particular relates to a construction method for excavating a side slope of a super-long harbor basin. Background technique [0002] 1. Basic situation [0003] The development of my country's dredging industry has a history of hundreds of years. Driven by the wave of economic globalization and the rapid development of international trade, in order to meet the needs of the large-scale development of container and tanker transportation, various parts of my country have built ports, widened and deepened coastal waterways. In order to improve the navigation capacity, the dredging industry has developed rapidly. At the same time, with the development of ports, waterways, farmland water conservancy and coastal cities, the field of dredging operations has also been extended to a large extent. Farmland water conservancy and reservoir construction and maintenance, national defense en...
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