Semi-assembly type ecological debris flow check dam, and construction method thereof

Abstract

A semi-assembled ecotype debris dam for mudflow comprises a dam body foundation (2) and a dam body thereon. The dam body comprises a mudflow overflowing segment (3) and dam abutments being on the two sides of the overflowing segment (3). The mudflow overflowing segment (3) is constructed by mortar and masonry or concrete or reinforced concrete. The dam abutments are formed by several prefabricated reinforced concrete cuboid cases (1) being cross connected. The cuboid cases (1) are open in the top surface and are sealed in the other five surfaces. The interior of the cuboid cases (1) is filled with soil body and the surface of the soil body which is not covered by the upper cuboid cases (1) is planted with bushes or grasses. The gradients of the inside and outside slopes of the dam abutments are equal and the inside of the dam abutments is installed with a buffering cushion (9). Disclosed is also a construction method of the semi-assembled ecotype debris dam for mudflow.

Description

technical field [0001] The present invention relates to a mud-rock flow prevention and control technology, in particular to a semi-structure for quickly assembling the dam abutment and planting shrubs or grass on the upper surface of the dam abutment (including the dam abutment slope surface and the dam abutment top surface) based on a rectangular box to quickly restore ecology. An assembled ecological type debris flow sand retaining dam and a construction method thereof. Background technique [0002] Debris flow disaster is one of the main types of geological disasters in my country. With the development of the mountainous economy and the deepening of the western development, the demand for debris flow control is becoming more and more vigorous. As one of the main types of debris flow control projects, sand control dams are widely used in debris flow control. [0003] At present, the sand retaining dam mainly adopts a masonry structure, or a concrete structure, or a reinf...

AI Technical Summary

Problems solved by technology

The existing sand control dam and its construction method have the following defects: first, due to foundation excavation, material stacking, concrete mixing, etc., it is easy to cause serious environmental damage on the construction site; second, due to the limitation of the construction site, the construction period is often relatively short However, the construction of sand check dams has high requirements for seasons, and is generally constructed in the dry season, not in the rainy season. Careful planning of the process is required, otherwise delays in a certain link will affect the entire project; third, On-site construction has high requirements on materials. Generally, the soil with too high viscosity content and low gravel strength cannot be used as masonry and concrete materials. Income will lead to a substantial increase in project investment

The sand control dam has the advantages of fast construction, less damage to the site, and full use of soil materials in the ditch. However, when the sand control dam is applied to a high-frequency debris flow ditch or a debris flow ditch with constant water flow, it has the following defects: (1 ) The overflow section of the dam body is subjected to the greatest impact force of debris flow, and the assembly of this section may cause the dam body to be damaged because the impact force of debris flow exceeds the box design standard; (2) There is no overflow problem in the dam abutment, and the dam abutment adopts the The design of the inner gentle slope and outer steep slope of the same section is not conducive to the dam abutment’s resistance to debris flow impact and the balance of the foundation’s bearing capacity; (3) The dam crest is sealed with masonry or concrete, which is not conducive to ecological restoration

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