Search

CN-224213352-U - Open caisson structure suitable for soft rock dynamic side slope

CN224213352UCN 224213352 UCN224213352 UCN 224213352UCN-224213352-U

Abstract

The utility model relates to the technical field of open caisson equipment, in particular to an open caisson structure suitable for a dynamic slope of soft rock, which comprises a retaining wall, wherein the retaining wall adopts a cylindrical structure with upper and lower openings, the top of dado is installed the top ring, and the stone layer is installed to the bottom opening part of dado, and the inboard of dado is provided with the winding pipe, and the well lid is installed at the top of top ring, places the water pump support on the well lid. In the open caisson structure suitable for the soft rock dynamic side slope, the retaining wall adopts a structure of casting a concrete layer outside the steel bar frame, so that the integral bearing capacity and deformation resistance of the open caisson can be enhanced. Compared with the traditional open caisson, the open caisson can better adapt to complex geological conditions of the dynamic side slope of the soft rock, effectively resist the influence caused by rock weathering, crushing and external load change, thereby accurately controlling the displacement of the side slope, guaranteeing the stability of the side slope in the long-term use process and reducing the risks of disasters such as landslide.

Inventors

  • JIANG TAO
  • WANG ENSHU
  • ZHANG YUNING

Assignees

  • 楚雄州吕合煤业有限责任公司

Dates

Publication Date
20260508
Application Date
20250530

Claims (8)

  1. 1. The open caisson structure suitable for the soft rock dynamic side slope comprises a protective wall (1) and is characterized in that the protective wall (1) adopts a cylindrical structure with upper and lower openings, a top ring (2) is arranged at the top of the protective wall (1), a stone layer (5) is arranged at the bottom opening of the protective wall (1), a winding pipe (4) is arranged on the inner side of the protective wall (1), a well cover (3) is arranged at the top of the top ring (2), and a water pump support (7) is arranged on the well cover (3).
  2. 2. The open caisson structure suitable for soft rock dynamic side slope according to claim 1, wherein the middle part of the retaining wall (1) is provided with a plurality of hydrophobic sleeves (6), and the hydrophobic sleeves (6) are annularly and equally arranged along the inner wall of the retaining wall (1) at a distance of 1000mm.
  3. 3. The open caisson structure suitable for soft rock dynamic side slope according to claim 2, wherein the hydrophobic sleeve (6) is made of metal or hard plastic, one end of the hydrophobic sleeve extends to the outer side of the retaining wall (1), and the other end of the hydrophobic sleeve is located at the inner side of the retaining wall (1).
  4. 4. The open caisson structure suitable for soft rock dynamic side slope according to claim 1, wherein the top ring (2) is 1.2M higher than the ground, clay bricks are used for supporting, and a cement mortar layer of 7.5M is smeared on the outer side.
  5. 5. The open caisson structure suitable for soft rock dynamic side slopes according to claim 1, characterized in that the retaining wall (1) comprises a steel bar frame (11), and a concrete layer (12) is poured outside the steel bar frame (11).
  6. 6. The open caisson structure suitable for soft rock dynamic side slope according to claim 1, wherein the masonry layer is formed by dry-laying small pebbles of 15-30mm and large pebbles of 20-30mm in a mixed manner.
  7. 7. The open caisson structure suitable for soft rock dynamic side slope according to claim 1, wherein the bottom end of the winding pipe (4) is inserted into the masonry layer (5), and the depth of inserting into the masonry layer (5) is not less than 300mm.
  8. 8. The open caisson structure suitable for soft rock dynamic side slope according to claim 1, wherein the winding pipe (4) is a permeable material pipe body with the outer diameter of 1200-1400mm, and uniformly distributed permeable holes are arranged on the pipe wall for drainage of the side slope.

Description

Open caisson structure suitable for soft rock dynamic side slope Technical Field The utility model relates to the technical field of open caisson equipment, in particular to an open caisson structure suitable for a dynamic side slope of soft rock. Background In the field of geological engineering, the stability of a dynamic slope of soft rock is always a key problem in engineering construction. Soft rock has the characteristics of low strength, large deformation, softening when meeting water and the like, is extremely easy to be influenced by factors such as groundwater seepage, weathering, external load change and the like in the slope forming process, causes frequent disasters such as slope instability, landslide and the like, and seriously threatens the safety of peripheral engineering facilities and personnel, life and property. At present, aiming at the protection and reinforcement of a soft rock dynamic slope, a plurality of problems are exposed in the practical application of the open caisson structure. For example, patent application number 201110032185.0 'reinforced concrete open caisson construction for weak soil stratum', although the invention avoids deep-cut bottom of a pot to a certain extent and reduces open caisson sinking phenomenon, the invention focuses on the weak soil stratum mainly, and the complex geological characteristics of the dynamic slope of soft rock, such as weathering and crushing of rock, dynamic change of groundwater and the like, are not considered enough, so that the displacement of the slope is difficult to control effectively, and the severe requirement of the dynamic slope of soft rock on the structural stability of the open caisson cannot be met. For another example, the 'combined open caisson suitable for rock' with the patent number of CN217325444U is mainly suitable for 'hard rock', the side wall of the rock cannot be weathered and collapsed in the construction excavation process, and the construction mode is the normal way. However, the soft rock excavation construction difficulty in the soft rock dynamic side slope is high, large-area weathering falling and collapse easily occur in the excavation process, and the structure and the construction mode of the patent are not suitable for the soft rock dynamic side slope, and if the soft rock excavation construction method is forcedly applied, great potential safety hazards are brought. In addition, some open caisson structures perform poorly in terms of hydrophobic function. If some traditional open caissons are not provided with a drainage system reasonably, accumulated water in the slope cannot be timely discharged, so that the soft rock is further reduced in long-term soaking strength, and the risk of slope instability is increased. Meanwhile, the requirements of later monitoring and maintenance are not fully considered in the design of some open caissons, so that the installation of drainage and detection equipment is not facilitated, and the real-time effective monitoring of the side slope state is difficult. Disclosure of utility model The utility model aims to provide an open caisson structure suitable for a dynamic soft rock slope, so as to solve the problems that the factors such as weathering and crushing of rock, dynamic change of underground water and the like are not considered enough, the displacement of the slope is difficult to effectively control, and the severe requirements of the dynamic soft rock slope on the stability of the open caisson structure cannot be met. In order to achieve the above purpose, the utility model provides a sunk well structure suitable for a dynamic side slope of soft rock, which comprises a protective wall, wherein the protective wall adopts a cylindrical structure with upper and lower openings, a top ring is arranged at the top of the protective wall, a stone layer is arranged at the bottom opening of the protective wall, a winding pipe is arranged on the inner side of the protective wall, a well cover is arranged at the top of the top ring, and a water pump bracket is arranged on the well cover. The device adopts a cylindrical wall protection structure, and can effectively resist the lateral pressure from the dynamic side slope of the soft rock by utilizing the uniform stress characteristic of the circular section. The top ring enhances the structural strength of the top of the retaining wall, prevents the wellhead from collapsing, takes the masonry layer as a bottom support, disperses the dead weight and external load of the open caisson, and avoids excessive disturbance of the bottom soil body in the sinking process of the open caisson. The winding pipe is positioned at the inner side of the open caisson and is used as a main drainage channel for guiding groundwater to flow into the well, and the well cover and the water pump bracket provide a foundation for the installation of later-stage drainage equipment. Preferably, a plurality of hydrophobic sleeves are arranged in