阅读说明：本技术 一种下沉式预制检查井及其地埋施工方法 (Sinking type prefabricated inspection well and underground construction method thereof ) 是由 万玉生 李文秋 徐亚男 叶雅丽 王晓杰 姜天凌 于 2021-06-24 设计创作，主要内容包括：一种下沉式预制检查井,包括顶板、底板及阀门井井筒,其中顶板及底板分别固设并封堵在阀门井井筒两个轴向开口的端面上；阀门井井筒底部开口处一体制出有环形刃脚,且阀门井井筒的下部径向开设有多个洞口；洞口下方的阀门井内壁上一体制出有径向延伸的牛腿。预制检查井的地埋施工方法,包括：步骤一,在工厂预制好阀门井井筒并垂向吊装至预定地埋位置；步骤二,在阀门井井筒的顶部开口处铺设垫板,并在垫板顶面轴心位置架设压力设备；步骤三,将阀门井井筒压至预定地埋深度,而后开掘阀门井井筒内部的渣土；步骤四,浇筑混凝土底板,并安装混凝土顶板。该预制检查井使用方便,施工简单,对临近构建筑物以及人类的交通和日常生活影响较小。(A sinking type prefabricated inspection well comprises a top plate, a bottom plate and a valve well shaft, wherein the top plate and the bottom plate are fixedly arranged on and plugged on the end faces of two axial openings of the valve well shaft respectively; an annular cutting edge is integrally manufactured at an opening at the bottom of the valve well shaft, and a plurality of holes are radially formed in the lower part of the valve well shaft; the inner wall of the valve well below the hole is integrally provided with a bracket extending in the radial direction. The underground construction method of the prefabricated inspection well comprises the following steps: firstly, prefabricating a valve well shaft in a factory and vertically hoisting the valve well shaft to a preset underground position; laying a base plate at the top opening of the valve well shaft, and erecting pressure equipment at the axis position of the top surface of the base plate; pressing the valve well shaft to a preset buried depth, and excavating muck in the valve well shaft; and step four, pouring a concrete bottom plate and installing a concrete top plate. The prefabricated inspection well is convenient to use, simple to construct and small in influence on the traffic and daily life of buildings and human beings.)

1. The utility model provides a prefabricated inspection shaft of formula of sinking which characterized in that: the device comprises a top plate, a bottom plate and a valve well shaft, wherein the top plate and the bottom plate are respectively fixedly arranged and blocked on the end faces of two axial openings of the valve well shaft; an annular cutting edge is integrally formed at an opening at the bottom of the valve well shaft, and a plurality of holes are radially formed in the lower part of the valve well shaft; and the inner wall of the valve well below the hole is integrally provided with a bracket extending in the radial direction.

2. A sunken prefabricated manhole according to claim 1, wherein: the circumferential outer wall of the valve well shaft is of a stepped structure, and the diameter of the outer wall of the top of the valve well shaft is smaller than that of the outer wall of the bottom of the valve well shaft.

3. A buried construction method of a sunken prefabricated manhole according to claim 1, comprising the steps of:

firstly, prefabricating a valve well shaft in a factory and vertically hoisting the valve well shaft to a preset underground position;

laying a base plate at the top opening of the valve well shaft, and erecting pressure equipment at the axis position of the top surface of the base plate;

pressing the valve well shaft to a preset buried depth, and excavating muck in the valve well shaft;

and step four, pouring a concrete bottom plate and installing a concrete top plate.

4. The underground construction method of the sunken prefabricated inspection well according to claim 3, wherein: and the pressure equipment in the second step is static pressure equipment or hammering pressure equipment.

5. The underground construction method of the sunken prefabricated inspection well according to claim 3, wherein: and the backing plate in the third step covers the axial end face of the top opening of the valve well shaft.

6. The underground construction method of the sunken prefabricated inspection well according to claim 3, wherein: and the concrete top plate in the fourth step is a precast slab or a cast-in-place slab.

Technical Field

The invention relates to the technical field of municipal engineering, in particular to a sunken prefabricated inspection well and an underground construction method thereof.

Background

The inspection well is an auxiliary structure which is convenient for regular inspection and is arranged for convenient maintenance and installation of power supply, water supply, drainage, pollution discharge, communication, cable television, gas pipes, street lamp lines and the like of the urban underground infrastructure. The existing inspection well construction process has the problems of large soil excavation amount, large influence on adjacent buildings and human traffic and daily life and the like.

Through published patent searches, the following comparison documents were found:

CN105019476A discloses a prefabricated reinforced concrete inspection well, which comprises a main pipe access section, a branch pipe access section, a height adjusting section, a shaft and a well cover, wherein the main pipe access section is used for accessing a main pipe of an underground pipeline, the branch pipe access section is connected to the upper part of the main pipe access section, the height adjusting section is connected to the upper part of the branch pipe access section, the shaft is connected to the upper part of the height adjusting section, and the well cover is covered in the shaft to seal the shaft; the well body strength of the inspection well is C30, concrete operation required on site is less, the integrity is good, the strength is high, the well body is prevented from sinking, the double-layer well cover cannot be damaged simultaneously, potential safety hazards are avoided, and accidents that people are easily injured and vehicles are damaged in the traditional inspection well are solved. The prefabricated reinforced concrete inspection well belongs to an environment-friendly and energy-saving new material, accords with the national industrial policy, and is the need for building a sustainable development society.

Through analysis, the prefabricated reinforced concrete inspection well in the patent and the application have great difference in both prefabricated structures and burying methods, so that the novelty of the application is not influenced.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a sunken prefabricated inspection well and an underground construction method thereof.

A sinking type prefabricated inspection well comprises a top plate, a bottom plate and a valve well shaft, wherein the top plate and the bottom plate are fixedly arranged on and plugged on the end faces of two axial openings of the valve well shaft respectively; an annular cutting edge is integrally manufactured at an opening at the bottom of the valve well shaft, and a plurality of holes are radially formed in the lower part of the valve well shaft; the inner wall of the valve well below the hole is integrally provided with a bracket extending in the radial direction.

And the circumferential outer wall of the valve well shaft is of a stepped structure, and the diameter of the outer wall at the top of the valve well shaft is smaller than that of the outer wall at the bottom of the valve well shaft.

A buried construction method of a sinking type prefabricated inspection well comprises the following steps:

firstly, prefabricating a valve well shaft in a factory and vertically hoisting the valve well shaft to a preset underground position;

laying a base plate at the top opening of the valve well shaft, and erecting pressure equipment at the axis position of the top surface of the base plate;

pressing the valve well shaft to a preset buried depth, and excavating muck in the valve well shaft;

and step four, pouring a concrete bottom plate and installing a concrete top plate.

And the pressure device in the second step is a static pressure device or a hammering pressure device.

And the backing plate in the third step covers the axial end face of the top opening of the valve well shaft.

And the concrete top plate in the fourth step is a precast slab or a cast-in-place slab.

The invention has the advantages and technical effects that:

the sinking type prefabricated inspection well and the underground construction method thereof have the advantages of convenience in use, simplicity in construction, easiness in operation, no need of large-range excavation in the construction process, small influence on adjacent buildings and human traffic and daily life, and capability of overcoming the defects of the prior art. The main points of action are as follows:

1) valve well pit shaft and roof adopt the mill prefabrication, easily guarantee the component quality.

2) The excavation cost is saved, and the foundation pit supporting cost is saved.

3) Sinking in a static pressure mode, not needing to excavate construction positions such as roads, only needing to excavate the road surface of a well body part, not needing to excavate and release a slope, and not needing a support measure; the device sinks in a hammering mode, does not need to excavate construction positions such as roads, only needs to excavate the road surface of a well body part, does not need to excavate the road in a large area, does not need to excavate and slope, and does not need supporting measures.

4) Sinking by static pressure and hammering mode, sinking by static pressure mode, sinking period of one inspection well is about 10 minutes, and especially when construction is carried out on a traffic road, influence on current traffic is greatly reduced.

5) And the road is sunk in a static pressure mode, so that large-area excavation is not needed for the road, and the influence on surrounding buildings and structures is small.

Drawings

FIG. 1 is a schematic diagram of the underground construction of a sunken prefabricated inspection well (static pressure equipment) in the invention;

FIG. 2 is a side view of FIG. 1 (static pressure apparatus);

FIG. 3 is a schematic diagram of the underground construction of the sinking type prefabricated inspection well (hammering pressure equipment) in the invention;

in the figure: 1-valve well shaft; 2-bracket; 3-annular edge feet; 4-a backing plate; 5-a pressure device; 6-opening.

Detailed Description

For a further understanding of the contents, features and effects of the present invention, reference will now be made to the following examples, which are to be considered in conjunction with the accompanying drawings. It should be noted that the present embodiment is illustrative, not restrictive, and the scope of the invention should not be limited thereby.

A sinking type prefabricated inspection well comprises a top plate, a bottom plate and a valve well shaft 1, wherein the top plate and the bottom plate are fixedly arranged on and blocked off the end faces of two axial openings of the valve well shaft respectively; an annular cutting edge 3 is integrally formed at an opening at the bottom of the valve well shaft, and a plurality of holes 6 are radially formed at the lower part of the valve well shaft; a bracket 2 extending in the radial direction is integrally arranged on the inner wall of the valve well below the hole.

And the circumferential outer wall of the valve well shaft is of a stepped structure, and the diameter of the outer wall at the top of the valve well shaft is smaller than that of the outer wall at the bottom of the valve well shaft.

A buried construction method of a sinking type prefabricated inspection well comprises the following steps:

firstly, prefabricating a valve well shaft in a factory and vertically hoisting the valve well shaft to a preset underground position;

step two, laying a base plate 4 at the top opening of a valve well shaft, and erecting a pressure device 5 at the axis position of the top surface of the base plate;

pressing the valve well shaft to a preset buried depth, and excavating muck in the valve well shaft;

and step four, pouring a concrete bottom plate and installing a concrete top plate.

And the pressure device in the second step is a static pressure device or a hammering pressure device.

And the backing plate in the third step covers the axial end face of the top opening of the valve well shaft.

And the concrete top plate in the fourth step is a precast slab or a cast-in-place slab.

In addition, the static pressure equipment or hammering pressure equipment in the pressure equipment preferably adopts mature products in the prior art

To more clearly illustrate the embodiments of the present invention, an example is provided below:

as shown in fig. 1, a corbel structure is arranged below the inspection shaft, a cutting edge structure is arranged at the bottom of the inspection shaft, the inspection shaft is provided with a hole and a blocking structure, a prefabricated (or cast-in-situ) top plate is placed at the top of the inspection shaft, and a bottom plate is poured at the corbel structure.

The prefabricated inspection well is prefabricated and inspected in a factory before buried construction, and comprises an inspection well shaft (provided with brackets, cutting edges, a hole and a hole plugging device) and other accessory components. And (4) transporting the prefabricated inspection well to a construction site, hoisting by using a hoisting device, accurately positioning and vertically placing. Laying a base plate at the top of the inspection well, adjusting the base plate to be flat, pressing down the base plate from the top of the inspection well by using a static pressure device or a hammering device to enable the shaft to sink, extruding and compressing the peripheral soil mass under the action of static force or hammering force and self-weight, gradually sinking to a preset design elevation, taking out the soil mass which is poured in the shaft due to the extrusion of the soil mass, pouring a bottom plate and placing a prefabricated (or cast-in-situ) top plate.

In particular, the outer wall of the inspection well adopts a step shape to reduce the friction resistance.

Particularly, the shaft of the inspection well is constructed by adopting a prefabricated assembly device, so that the working period can be shortened, the quality is more controllable, and the safety is improved.

Particularly, the prefabricated inspection well is not provided with a bottom plate, and the bottom plate is cast in situ after a shaft of the inspection well reaches a designed elevation by adopting static pressure construction.

Particularly, the construction method of the static pressure type sinking prefabricated inspection well belongs to a non-excavation construction method, is stable and reliable in technical process, has small influence on adjacent buildings, reduces the influence on existing traffic and reduces the influence on the environment.

Finally, the invention adopts the mature products and the mature technical means in the prior art.

It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.