CN104612101B - Beach method and special water-permeable pipe are supported in a kind of water-permeable pipe sandy beach - Google Patents

Abstract

The invention provides a permeable pipe beach maintenance method and a special permeable pipe. The permeable pipe includes a pipe body, the pipe body is surrounded by water-permeable joints, the upper end of the pipe body is provided with a pipe cap, and a vent hole is left in the middle of the pipe cap, and the vent hole is blocked with a sand-proof porous material. The permeable pipe body and cap are made of PVC. The permeable pipe beach maintenance method is to arrange permeable pipes (parallel or staggered) at intervals between the wave breaking zone and the highest wave climbing line. The main construction process of the present invention includes: measuring and positioning, excavating pits, driving steel casings, connecting sand pumps, pumping sand, placing permeable pipes, pulling out steel casings and backfilling. The main advantages of the present invention are that the construction of the permeable pipe beach raising method is simple and convenient, the initial investment is small, and the later maintenance cost is low. The beach permeable pipe is buried in the beach without other auxiliary engineering measures, which will not damage the natural beauty and hydrophilic environment of the original beach, and greatly improves the value of tourism resources in the seaside area.

Description

A permeable pipe beach maintenance method and special permeable pipe

technical field

The invention belongs to the technical field of coast protection engineering, and relates to a beach protection and beach maintenance technology, in particular to a method for beach maintenance by using permeable pipes.

Background technique

With the change of global climate and the intensification of human activities, coastal erosion has become a worldwide disaster. The Intergovernmental Panel on Climate Change estimates that 70 percent of the world's sandy coasts are eroding. Since most coastlines in my country are sandy coasts, coastal erosion is very serious. The average coastline erosion rate is greater than 1.1m/a, and locally reaches 5.5m/a or more. The existing beach maintenance technology is mainly to widen and stabilize the eroded beach by throwing a large amount of sand to the beach and building hard works such as dike dams and spur dams at the same time. The traditional beach raising technology has solved the problem of beach erosion to a certain extent, but there are also obvious deficiencies. On the one hand, a large number of artificial sand throwing and hard engineering measures require a huge amount of capital investment, and in the later stage according to the erosion situation, artificial sand replenishment needs to be carried out regularly, and the maintenance cost is high; The natural beauty of the beach and the hydrophilic environment have been reduced, and the value of tourism resources in the seaside area has been reduced.

Contents of the invention

The object of the present invention is to solve the deficiency of the traditional technology of raising beaches, and propose a method of raising beaches with permeable pipes and special permeable pipes. This method is especially suitable for the protection of erosion-type sandy coasts.

The water-permeable pipe specially used for beach maintenance provided by the invention includes a pipe body with water-permeable joints around the pipe body and a pipe cap on the upper end of the pipe body. There is a vent hole in the middle of the pipe cap, and the vent hole is blocked with a sand-proof porous material. The permeable joints around the body of the permeable pipe are horizontal permeable joints. The horizontal permeable joints are arranged in groups, and intervals are left between each group along the axial direction and the circumferential direction. The pipe body and the pipe cap are made of PVC, and the pipe cap is connected with the permeable pipe body through threads.

The permeable pipe beach maintenance method provided by the present invention is to arrange the permeable pipes at intervals between the wave breaking zone and the highest wave climbing line. The permeable pipes can be arranged in parallel or in a staggered manner.

The main construction process of the method of the invention includes: measuring and positioning, excavating pits, driving steel casings, connecting sand pumps, pumping sand, placing permeable pipes, pulling out steel casings and backfilling.

The present invention has the following advantages and effects relative to traditional measures for raising beaches:

The permeable pipe beach maintenance method is simple and convenient in construction, with small initial investment and low maintenance cost in the later period.

The beach permeable pipe is buried in the beach without other auxiliary engineering measures, which will not damage the natural beauty and hydrophilic environment of the original beach, and greatly improves the value of tourism resources in the seaside area.

Description of drawings

Fig. 1 is a schematic elevation view of a permeable pipe in the present invention.

Fig. 2 is a schematic diagram of the expansion of the permeable pipe in the present invention.

Fig. 3 is a top view of the permeable pipe cap in the present invention.

Fig. 4 is a side view of the permeable pipe cap in the present invention

Fig. 5 is an elevation layout diagram of the permeable pipes in the beach.

Fig. 6 is a schematic diagram of the working principle of the permeable pipe.

Fig. 7 is a plan view of permeable pipes arranged in parallel on the beach.

Fig. 8 is a plane view of permeable pipes arranged in a staggered manner on the beach.

The reference numerals in the figure are: the permeable pipe cap 1; the permeable seam 2 in the permeable pipe; the cap air hole 3; the buried permeable pipe 4; the wave direction 5; the maximum wave climbing position 6; the beach 7; Vertical infiltration 8; seawater infiltration surface 9.

detailed description

The present invention will be further described below with reference to the accompanying drawings.

Embodiment 1, permeable pipe

As shown in Figure 1, the permeable pipe consists of a PVC round pipe body with a permeable joint 2 and a PVC pipe cap 1. The diameter of the round pipe is 150-300 mm and the length is 2-3 m. The pipe body is provided with a horizontal permeable joint with a width of 0.3 mm. .

As shown in FIG. 2 , the horizontal permeable joints are arranged in groups, and intervals are left between each group along the axial direction and the circumferential direction.

As shown in Figures 3 and 4, the cap 1 of the water permeable pipe is provided with a vent hole 3, and the vent hole is blocked with a porous material to ensure ventilation and impermeable sand.

Embodiment 2, method for raising beach on permeable pipe beach

As shown in Figures 5 to 8, the method is to arrange the permeable pipes mainly (vertically) between the wave breaking zone and the highest wave climbing line. The permeable pipes can be arranged in parallel (as shown in FIG. 7 ) or staggered (as shown in FIG. 8 ).

The main construction process of the method of the invention includes: measuring and positioning, excavating pits, driving steel casings, connecting sand pumps, pumping sand, placing permeable pipes, pulling out steel casings and backfilling.

The main principle of the permeable pipe beach maintenance method is: when the tide is high, the seawater carries sediment to the beach. At this time, the beach is wet and not saturated. A large amount of seawater quickly flows into the beach through the permeable pipe, and the sediment carried by the seawater is deposited in the permeable pipe. Surroundings, due to the existence of permeable pipes, the amount of sand deposited on the beach during high tide is greater than that taken away by sea water during ebb tide, so that the beach is slowly silted up to achieve the purpose of beach maintenance and restoration.

Application example 1

A physical model test of permeable pipe beach cultivation was carried out in a tank of Tianjin Academy of Water Transport Engineering Science, Ministry of Transport. Continuous wave action is performed on the beach without permeable pipes. After the slope of the beach is stabilized, the stable section shape is recorded, and four permeable pipes are evenly fixed on the slope sedimentation section with sand (as shown in Figure 5 and Figure 6). Continue the test under the same wave conditions until the beach slope stabilizes. Comparing the slope of the beach before and after the arrangement of permeable pipes, it can be seen that after the arrangement of permeable pipes, the flushing position of the beach is moved forward by about 45.0cm, and the maximum sedimentation height is 1.9cm higher than before the arrangement of pipes, thus achieving the purpose of beach maintenance.

Claims (7)

1. A special permeable pipe for beach maintenance, characterized in that the permeable pipe includes a pipe body, the pipe body is surrounded by water-permeable joints, the upper end of the pipe body is provided with a cap, and there is a vent hole in the middle of the cap, and the vent hole is used for sand prevention. Porous material plugging. 2. The water-permeable pipe according to claim 1, characterized in that the water-permeable joints around the body of the water-permeable pipe are horizontal water-permeable joints. 3. The water-permeable pipe according to claim 2, characterized in that the horizontal water-permeable joints are arranged in groups, and intervals are left between each group along the axial direction and the circumferential direction. 4. The permeable pipe according to any one of claims 1 to 3, characterized in that the pipe body and cap are made of PVC, and the cap is connected to the body of the permeable pipe through threads. 5. A method for beach maintenance using the permeable pipe according to claim 1, characterized in that the method is to arrange the permeable pipe according to claim 1 at intervals between the wave breaking zone and the highest wave climbing line. 6. The method according to claim 5, characterized in that the permeable pipes are arranged perpendicular to the ground on the facade, and arranged in parallel or staggered on the plane. 7. The method according to claim 5 or 6, characterized in that the main construction process includes: measuring and positioning, excavating pits, driving steel casings, connecting sand pumps, pumping sand, placing permeable pipes, pulling out steel pipes Casing and backfill coverage.