CN205475330U - Safe plastic inspection shaft - Google Patents

Abstract

The utility model discloses a safe plastic inspection shaft, include the pit shaft of vertical setting and locate the well lid that pit shaft top well head was located, the pit shaft includes the stack shell of cylinder section of thick bamboo structure, the awl mouth of well head for reducing gradually from last internal diameter extremely down at pit shaft top, well lid upper portion be with an awl mouthful complex frustum of a cone structure, the lower part of well lid be with the cylinder structure of stack shell inner wall elasticity laminating, the intercommunication pit shaft inner chamber and external atmospheric through -hole more than two of being equipped with that is the circumference equipartition between pit shaft inner wall and the well lid outer peripheral face. The utility model discloses the effectual atress structure that changes the plastic inspection shaft has improved the bearing capacity of plastic inspection shaft to make the plastic inspection shaft have more application scope, solved the defect of current plastic inspection shaft.

Description

A kind of safe plastic inspection shaft

Technical field

This utility model relates to a kind of foundation engineering facility, specifically relates to a kind of safe plastic inspection shaft.

Background technology

In recent years, along with Chinese society expanding economy, city, various places is being gradually increased urban infrastructure construction, in some rain, sewage vent line construction, a kind of plastic cement inspection shaft with length in its, easy construction in service life, can effectively prevent the feature of effluent seepage, the most progressively replace traditional brick well.But the well head of existing plastic cement inspection shaft is due to the restriction of material, and the intensity of its well head is relatively low, it is difficult to bearing a heavy burden, the range causing plastic cement inspection shaft is limited, it is impossible to be applied to the pipe laying under urban road.

Summary of the invention

The purpose of this utility model is: provides a kind of simple in construction, load the safe plastic inspection shaft big, intensity is high.

The technical solution of the utility model is: a kind of safe plastic inspection shaft, including vertically arranged pit shaft and be located at the well lid at the well head of pit shaft top, described pit shaft includes that the stack shell of cylindrical structure, the well head at described pit shaft top are the diminishing cone mouth of internal diameter from top to bottom；Described well lid top is the circular cone structure coordinated with described cone mouth, and the bottom of well lid is and the cylindrical structure of described stack shell inwall elastic fit；The through hole being provided with two or more connected well tube inner chamber and ambient atmosphere the most uniform between described shaft in wall and well lid outer peripheral face.

It is provided with plural plastic cement reinforcing plate at described pit shaft outer wall radial convex at described well head.

It is convexly equipped with pawl on the surface of described plastic cement reinforcing plate.

The well lid of safe plastic inspection shaft of the present utility model is when by extraneous action of gravity, its top is coordinated with the well head of pit shaft by the conical surface, the gravity that well lid can be born by cone match by a part of power soil stress outside surrounding dissipates by pit shaft, thus alleviate the vertical pressure of stack shell, and well lid is while by extraneous action of gravity, it can make a part of power cylindrical elastic deformation by bottom and lateral transport is to shaft in wall, change pit shaft Impact direction, the support degree making pit shaft is enhanced, it is not only simple in structure, easy to install, and effectively enhance the load capacity of plastic cement inspection shaft, the through hole arranged between well lid and pit shaft can make the dirty gas in well be discharged in air, improve the safety of plastic cement inspection shaft.

Accompanying drawing explanation

Fig. 1 is the structural representation of this utility model safe plastic inspection shaft.

Detailed description of the invention

The specific embodiment of safe plastic inspection shaft of the present utility model is as shown in Figure 1, it includes vertically arranged pit shaft 1 and is located at the well lid 4 at the well head of pit shaft 1 top, wherein, pit shaft 1 includes that the stack shell of cylindrical structure, the well head at pit shaft 1 top are the diminishing cone mouth of internal diameter 2 from top to bottom；Well lid 4 top is and the circular cone structure of cone mouth 2 corresponding matching, and the bottom of well lid 4 is and the cylindrical structure of stack shell inwall elastic fit.Also being evenly distributed in two or more between the inwall and the outer peripheral face of well lid 4 of pit shaft 1 and connect the through hole 3 of pit shaft 1 inner chamber and ambient atmosphere, the lower section in well lid is opened in the lower aperture being positioned at the through hole 3 on pit shaft 1 inwall.For improving the structural strength at pit shaft 1 well head further, its on the outer wall of pit shaft 1 at its top well head also radial convex be provided with plural plastic cement reinforcing plate 5, for improving the binding ability of plastic cement reinforcing plate 5 and surrounding ground, it is convexly equipped with pawl the most respectively on the surface of each plastic cement reinforcing plate 5.

After plastic cement inspection shaft installs, ground outside pit shaft is tamped, plastic cement reinforcing plate is combined with the ground of compacting by the pawl on surface can effectively place the well head part of pit shaft to inside contracting, simultaneously, well head can be made to ensure outer by the cone match of well lid Yu well head, when well lid is by extraneous action of gravity, a part of gravity is dissipated by the cone match phase surrounding of well lid with well head, change pit shaft Impact direction, a part of gravity makes the cylindrical portion generation elastic deformation of well lid bottom and by gravity lateral divergence, only have sub-fraction gravity vertically to be born by pit shaft, it effectively changes the force structure of plastic cement inspection shaft, improve the weight capacity of plastic cement inspection shaft, so that plastic cement inspection shaft has had the more scope of application, solve the defect of existing plastic cement inspection shaft.

Claims (3)

1. a safe plastic inspection shaft, including vertically arranged pit shaft and be located at the well lid at the well head of pit shaft top, it is characterised in that described pit shaft includes that the stack shell of cylindrical structure, the well head at described pit shaft top are the diminishing cone mouth of internal diameter from top to bottom；Described well lid top is the circular cone structure coordinated with described cone mouth, and the bottom of well lid is and the cylindrical structure of described stack shell inwall elastic fit；The through hole being provided with two or more connected well tube inner chamber and ambient atmosphere the most uniform between described shaft in wall and well lid outer peripheral face.

Safe plastic inspection shaft the most according to claim 1, it is characterised in that be provided with plural plastic cement reinforcing plate at described pit shaft outer wall radial convex at described well head.

Safe plastic inspection shaft the most according to claim 2, it is characterised in that be convexly equipped with pawl on the surface of described plastic cement reinforcing plate.