CN1413875A - Pontoon cabin row for stone spreading and levelling continuous work of under water riprap foundation bed construction - Google Patents

Abstract

The invention discloses a pontoon cabin row for underwater riprap foundation bed construction, which integrates stone paving and leveling for continuous operations. The row of pontoon cabins is composed of two pontoon cabins at the front and rear, three intermediate pontoon cabins between them and connecting beams on both sides of the pontoon cabins. The side section shapes of the front and rear two pontoon cabins are mainly composed of trapezoidal and rectangular shapes with right-angled sides. , the side section shape of the middle pontoon cabin is mainly composed of trapezoids, the side slant plates of two adjacent pontoon cabins form a sand and gravel funnel storehouse, and the funnel storehouses formed from the front pontoon cabin to the rear pontoon cabin are sand (or two pieces of stone) For funnel bins, large stone funnel bins, leveled sweet potato funnel bins, and leveled crushed stone funnel bins, except for the front pontoon cabin, leveling scraper beams are set at the front lower corners of other pontoon cabins, and each pontoon cabin together with the scraper beam The relative height and the horizontal distance of each can be adjusted, and its bottom is arranged in steps from the front pontoon cabin to the rear pontoon cabin. The invention realizes integrated continuous operation and fully mechanized construction of multiple processes in the construction of the riprap foundation bed, and has high construction efficiency and low cost.

Description

Underwater riprap foundation construction set stone laying and leveling continuous operation of pontoon cabin row

Technical field

The invention relates to a pontoon cabin row for underwater riprap foundation bed construction, which integrates stone paving and leveling for continuous operation. It belongs to auxiliary equipment for riprap foundation bed construction in the field of port and coastal engineering.

Background technique

In port and coastal engineering, there are many buildings that use underwater riprap foundations, such as gravity piers, breakwaters with superstructures, gravity piers of cross-sea bridges, etc. The construction process of the underwater riprap foundation bed is generally divided into foundation bed excavation, sand throwing or throwing two pieces of stones (ie small stones), throwing large stones, leveling the riprap foundation bed, and then installing the superstructure. Among them, the leveling of the riprap foundation bed is divided into rough leveling, fine leveling and very fine leveling. Sand throwing and rock throwing are generally transported to the site by barge and then filled with a grab machine or manually. At present, the rough leveling of the rock riprap foundation bed can only be done by divers, and the fine leveling and ultra-fine leveling can be done with the help of mechanical equipment. But the cooperation of divers is required. It can be seen that there are many procedures for underwater riprap foundation construction at present, and some procedures need to be manually operated, especially a large number of divers are required to perform physical labor underwater, so that the construction efficiency is low and the cost is high.

Therefore, it is necessary to develop an auxiliary construction device capable of integrating and continuously completing multiple processes of riprap foundation bed construction, so as to realize fully mechanized construction of the riprap foundation bed.

Contents of invention

The object of the present invention is to provide a kind of pontoon cabin row that collects stone paving and leveling continuous operation in underwater riprap foundation bed construction. The process of leveling, throwing large stones, rough leveling, fine leveling and ultra-fine leveling of the riprap foundation bed realizes integrated continuous operation, so the construction efficiency is high.

In order to achieve the above object, the present invention is achieved through the following technical solutions: the construction of the underwater riprap foundation bed consisting of two pontoon cabins at the front and rear and three intermediate pontoon cabins between them and connecting beams on both sides of the pontoon cabin. The row of pontoon cabins integrating stone paving and leveling is characterized in that the side section shapes of the front and back two pontoon cabins are mainly composed of trapezoids and rectangles with right-angled sides, and the side section shapes of the middle pontoon cabins are mainly composed of trapezoids. The side slant plates of two adjacent pontoon cabins constitute the sand and gravel material funnel warehouse, and the funnel warehouses formed from the front pontoon cabin to the rear pontoon cabin are successively sand (or two pieces of stone) funnel warehouse, large stone funnel warehouse, and leveled sweet potato stone funnel In addition to the front pontoon cabin, leveling scraper beams are set at the front lower corners of other pontoon cabins, and the relative height and horizontal distance of each pontoon cabin and the scraper beam can be adjusted. From the front pontoon cabin to The bottom of the rear floating cabin is arranged in steps.

The advantage of the present invention is that: the underwater riprap foundation bed construction integrates stone paving and leveling continuous operation of the pontoon cabin row to realize integrated continuous operation of multiple processes in the riprap foundation bed construction, and realizes the riprap foundation bed. Fully mechanized construction, high construction efficiency and low cost.

Description of drawings

The present invention is described below in conjunction with accompanying drawing.

Fig. 1 is a structural schematic diagram of the present invention.

FIG. 2 is a top view of FIG. 1 .

In the figure, 1 is the front floating cabin, 2 is the sand and gravel transport barge, 3 is the middle floating cabin, 4 is the rear floating cabin, 5 is the funnel bin for leveling crushed stones, 6 is for leveling the funnel bin for sweet potato stones, and 7 is for large stones Funnel storehouse, 8 is the funnel storehouse of sand (or two pieces of stone), 9 is the connecting beam of the floating cabin, 10 is the leveling scraper beam, 11 is the sand cushion (or two pieces of stone cushion) of the riprap bed, and 12 is the riprap bedding.

Detailed ways

An embodiment of the present invention is as follows: the underwater riprap foundation bed construction as shown in Figure 1 and Figure 2 is composed of stone paving and leveling continuous pontoon cabin rows, which are passed by the front pontoon cabin, the rear pontoon cabin and three intermediate pontoon cabins The connecting beams are connected, and a riprap foundation bed leveling scraper beam is arranged on the front side of the bottom of the three middle floating cabins and the rear floating cabin. The appearance scale of the row of pontoon cabins is 40m long, 20m wide, the height of the front pontoon cabin is 10m, the height of the rear pontoon cabin is 8m, and the height of the middle pontoon cabin is 2m-6m. Made of steel, the total weight of the device is about 350 tons. The volume of the gravel funnel bin is 160-240m ³ , and the width of the bottom opening of the funnel bin is determined according to the width of the riprap bed. The total volume of the buoyant pontoon chamber is 3440m ³ . When the gravel funnel is fully loaded, the underwater loading weight is about 1,000 tons. By distributing ballast water in the pontoon cabin, the pontoon cabin can be submerged at the bottom of the water or floated on the water surface. The pontoon cabin row can construct the riprap foundation bed with a width of less than 18m and a thickness of less than 6m in a water depth of 4m to 10m.

Before construction, adjust the bottom elevation of each pontoon cabin (that is, the elevation of the leveling scraper beam) according to the elevation of the water bottom, the thickness of the riprap bed, the thickness of the sand cushion or the thickness of the two stone cushions, and then use other methods to build a 30m long The bed of rock is thrown and the pontoon cabins are then rowed into place. By distributing ballast water in the pontoon cabin, the bottom of the rear pontoon cabin of the pontoon cabin row is located on the top surface of the built riprap foundation bed, and ballast water is allocated in the front pontoon cabin to keep the pontoon cabin row level. Construction operations can then begin. The height of each intermediate floating cabin should be designed according to the water depth, so that they are completely submerged underwater during the construction process, so that the barge carrying sand and gravel can directly enter the top of the funnel cabin to unload. After enough sand and gravel materials are installed in each funnel bin, anchor cables or tugboats can be used to drag the pontoon cabin row forward. During the forward movement of the pontoon cabin row, various sand and gravel materials will be released from the bottom hole of the funnel bin. The top surface of the riprap bed was rough-flattened, finely-flattened, and extremely fine-leveled after successively filling and scraping large stones, sweet potato stones and crushed stones. The continuous construction of the riprap foundation bed can be realized by continuously loading sand and gravel into the funnel chamber and dragging the pontoon chamber row forward. In the process of loading sand and gravel in the funnel store and pulling the pontoon cabin row forward, the ballast water in the front pontoon cabin should be adjusted in real time to keep the pontoon cabin row level, which can be realized by an automatic control system. According to the water level, the ballast water in each pontoon cabin should also be adjusted so that the pressure of the rear pontoon cabin and some middle pontoon cabins acting on the riprap foundation bed is appropriate, which can prevent waves and wind from causing the pontoon cabin row to sway, and Make the frictional resistance between the bottom of the pontoon cabin and the riprap bedding as small as possible so that the row of pontoon cabins can be dragged forward.

Underwater riprap foundation construction includes stone paving and leveling continuous operation of the pontoon cabin row, which realizes integrated continuous operation of multiple processes in the riprap foundation construction, and realizes fully mechanized construction of the riprap foundation, with high construction efficiency , Low cost.

Claims (1)

1. A kind of pontoon cabin row of underwater riprap foundation bed construction collection stone paving and leveling continuous operation, is made of two pontoon cabins front and back and three intermediate pontoon cabins between them and the connecting beams on both sides of the pontoon cabin, its It is characterized in that the side section shapes of the front and rear two pontoon cabins are mainly composed of a trapezoid and a rectangle with right-angled sides, the side section shape of the middle pontoon cabin is mainly composed of a trapezoid, and the side sloping plates of the two adjacent pontoon cabins constitute sand and gravel materials. The funnel bins, the funnel bins formed from the front floating cabin to the rear floating cabin are sand (or two pieces of stone) funnel bins, large stone funnel bins, leveled sweet potato funnel bins and leveled crushed stone funnel bins, except the front floating boat cabin Outside, leveling scraper beams are set at the front lower corners of other pontoon cabins, and the relative height and horizontal spacing of each pontoon cabin and the scraper beams can be adjusted.