CN115198799A - Large-scale rain sewage inspection shaft of circular UHPC of assembled - Google Patents

Abstract

The invention discloses an assembled round UHPC large-scale rainwater and sewage inspection well which comprises a UHPC bottom plate, a first UHPC well body, a second UHPC well body, a third UHPC well body and a UHPC well seat, wherein the UHPC bottom plate, the first UHPC well body, the second UHPC well body, the third UHPC well body and the UHPC well seat are arranged from bottom to top, the UHPC well seat is provided with a well cover, the first UHPC well body, the second UHPC well body, the UHPC well body and the UHPC well seat are sequentially connected through a rabbet structure, the longitudinal joint face of the rabbet structure is obliquely arranged, the transverse joint face of the rabbet structure is a horizontal plane, rabbet at the upper end of the first UHPC well body, the upper end of the second UHPC well body and the upper end of the third UHPC well body are bosses, each boss is provided with a first outer edge protruding out of the outer wall of the well body, the lower end of the second UHPC well body and the lower end of the third UHPC well body are notches, and each notch is provided with a second outer edge protruding out of the outer wall of the well body. The invention can effectively solve the problem of uneven road surface caused by traditional underground settlement inspection.

Description

Large-scale rain sewage inspection shaft of circular UHPC of assembled

Technical Field

The invention relates to the technical field of assembly type buildings, in particular to an assembly type round UHPC large-scale rain sewage inspection well.

Background

The urban construction scale of the current society is larger and larger, urban construction facilities are more and more perfect, the requirements of people on the urban facilities are higher and higher, and the position of the municipal facilities in the urban construction is more and more important. Municipal drainage networks are part of municipal works and are arteries in cities. In order to ensure the normal operation of cities and the normal life of residents, drainage pipelines and related facilities need to be checked and maintained regularly. The drainage inspection well is arranged for the convenience and safety of pipeline maintenance, so the drainage inspection well is arranged at a certain distance according to the standard requirement. The drainage inspection well is generally arranged on a city road and is synchronous with road construction during construction. Therefore, the occurrence of the diseases of the inspection well directly affects the driving safety of the road and the roadbed and the pavement of the road. With the importance of urban traffic in cities, the problems that inspection well diseases affect driving safety and resident life are widely concerned by society, the inspection well diseases are prevented and controlled from the source, the existing drainage inspection well diseases are cured, and the inspection well diseases become important subjects in road construction. The characteristics of the different types of inspection wells are shown in table 1.

Due to factors such as the width of the roadway and other pipeline influences, drainage pipelines are mostly arranged under the roadway. The failure rate, the repair and maintenance frequency and the cost of the drainage pipeline are far higher than those of other types of pipelines. The inspection well on the roadway and the periphery of the inspection well are weak parts of the road, the inspection well is easy to damage under the impact of vehicle load, and various diseases such as instability, damage, sinking, well seat ring crack, sinking and the like of the well lid often appear in the inspection well. Common diseases of inspection wells are shown in fig. 1 to 4, and for large inspection wells, main diseases and adverse effects on the society include:

(1) The construction period of pouring construction is long, the cost is high, the energy consumption is high, and the environment protection condition is great;

(2) The well lid protrudes out of the road surface and is tilted or has large sedimentation amount to cause depression, and rainwater and sewage drainage is not smooth;

(3) The dead weight of the large-scale pipe well is large, and the phenomenon of uneven settlement of the pipe well is obvious;

(4) The uneven settlement of the pipe well can cause the water leakage of the pipeline interface and aggravate the sandstone loss;

(5) The well cover frame is loosened, so that the appearance is influenced;

(6) The well lid is not tightly matched with the well frame, so that the well lid and the well frame are impacted when a vehicle runs, and noise is generated;

(7) Social influence and high construction cost brought by earth breaking construction of busy road sections

(8) Influence the use function and appearance image of the road;

(9) The flatness of the road is influenced, and the comfort and the safety of road traffic are reduced;

(10) The phenomenon of vehicle jumping and shaking is easily caused by the sedimentation of the pipe shaft, and even traffic accidents are caused;

(11) The service life of the road is shortened;

(12) The qualification rate of road appearance quality evaluation and actual measurement actual quantity is influenced, so that the comprehensive qualification rate is reduced and the quality grade is not high during engineering evaluation;

(13) The workload of later maintenance and repair of the pipeline is increased and increased, and a large amount of construction fund loss and waste are caused.

The traditional building industry can generate a large amount of building dust, construction noise, building garbage and other environmental pollutants. With the development of society, the assembled building under the industrialization mode has the advantages of unique thickness from the aspects of improving quality, reasonably accelerating construction period, protecting environment, saving energy and the like. However, the fabricated rainwater and sewage inspection well for a large number of current applications is generally only suitable for medium and small pipe wells with a depth of less than 1.2m and a depth of burial of no more than 6m, and has a structure as shown in fig. 5, which includes a bottom shaft a, a pipe connecting shaft b, an adjusting shaft c and a well seat d, and adjacent shafts or shafts and well seats are connected through a stepped rabbet structure. For example, a large diameter pipe well larger than 1.2m still needs to be constructed by concrete in situ.

Disclosure of Invention

The invention aims to provide an assembled circular UHPC large-scale rainwater and sewage inspection well, which can effectively solve the problem of uneven road surface caused by underground settlement of traditional inspection, and has the advantages of low carbon, environmental protection, convenient construction and high cost performance.

An assembled round UHPC large-scale rainwater and sewage inspection well comprises a UHPC bottom plate, a first UHPC well body, a second UHPC well body, a third UHPC well body and a UHPC well seat which are arranged from bottom to top, wherein the UHPC well seat is provided with a well cover, the first UHPC well body, the second UHPC well body, the third UHPC well body and the UHPC well seat are sequentially connected through a rabbet structure which is accurately bonded and butted, the longitudinal joint surface of the rabbet structure is obliquely arranged, the transverse joint surface of the rabbet structure is a horizontal surface, the upper end of the first UHPC well body, the upper end of the second UHPC well body and the third UHPC well body are bosses, the bosses are provided with first outer edges protruding out of the outer wall of the well body, the lower section of the first outer edges is obliquely arranged, the rabbets of the lower ends of the second UHPC well body and the lower end of the third UHPC well body are holes, the rabbet of the upper end of the first UHPC well body is provided with second outer edges protruding out walls, the upper section of the second UHPC well body is obliquely arranged, the first UHPC well body is embedded in the UHPC well body, and the UHPC well seat is connected with a second groove.

The invention relates to a method for analyzing the engineering pain points of inspection well sinking and subsequent problems, which comprises the following steps: the subsidence of the soft foundation of geology causes the subsidence of the whole well body and the looseness or breakage of the mortar layer between the cover plate and the well body. The bottom plate, the well body and the well seat are made of UHPC (ultra high performance concrete), the UHPC is a novel cement-based structural engineering material designed based on a maximum compactness theory, and the UHPC is composed of a plurality of components such as silica fume, cement, quartz sand, steel fiber, a high-efficiency water reducing agent and the like. The fine aggregates with different particle sizes are adopted to form the compact-packed ultrahigh-strength, ultrahigh-toughness and high-durability ultrahigh-performance cement-based composite material. The compressive strength can reach more than 130MPa, the tensile strength reaches more than 7MPa, the durability is 80 times that of common concrete, and the abrasion index is 30 times that of the common concrete. The invention fully utilizes the advantages of high strength, good durability, light weight, convenient construction and the like of the UHPC material, adopts the assembly type construction, assembles the large-scale rain sewage inspection well by the bottom plate, the plurality of well bodies and the well seat, and fills the blank of the large-scale assembly type rain sewage inspection well. And a tongue-and-groove structure with a slope is adopted, so that the following aims are achieved: 1. and secondly, the first outer edge and the second outer edge of the tongue-and-groove structure can enhance the anti-sliding capability of the well body in contact with the soil body, and enhance the friction force of connection. The sinking problem of the rain sewage inspection well is solved fundamentally.

The invention also has the following preferred design:

the UHPC bottom plate, the first UHPC well body, the second UHPC well body, the third UHPC well body and the UHPC well seat are all formed by prefabricating and pouring UHPC materials, the axial compressive strength of the UHPC materials is more than or equal to 130MPa, the axial tensile strength is more than or equal to 7MPa, and the fiber volume mixing amount is more than or equal to 2%.

The overall inspection well body is circular, the outer diameter of the well body is larger than 3 meters, the wall thickness of the well body is larger than or equal to 100mm and smaller than or equal to 150mm, the circular well body design is common in the design of the inspection well with medium and small diameters, the large inspection well body is usually designed in a rectangular well body, the rectangular well body design is matched with a cast-in-place concrete construction process, and the template and pouring construction are convenient. The invention adopts the design of the round well body, has more reasonable stress and saves more materials than the traditional rectangular inspection well.

The slope of the longitudinal joint face of the tongue-and-groove structure is 4: 1 to 5: 1.

The slope of the lower section of the first outer edge of the boss is 2: 1.

The slope of the upper section of the second outer edge of the notch is 2: 1.

A water-stopping rubber ring is arranged between an upper rabbet and a lower rabbet of the rabbet structure to perform anti-seepage sealing.

The invention has the following beneficial effects:

1. the invention adopts UHPC material to make the bottom plate, the well body and the well seat, fully utilizes the advantages of the UHPC material such as high strength, good durability, light weight, convenient construction and the like, adopts the assembly construction, assembles the large-scale rain sewage inspection well through the bottom plate, a plurality of well bodies and the well seat, fills the blank of the large-scale assembly type rain sewage inspection well, can design the inspection well component with light weight, is convenient for the on-site assembly construction, has low mechanical requirements of on-site transportation and hoisting construction, has high construction speed, is not influenced by weather in the construction process, and can carry out all-weather construction. The invention adopts a tongue-and-groove structure with a slope, and realizes the following aims: 1. and secondly, the first outer edge and the second outer edge of the tongue-and-groove structure can enhance the anti-sliding capability of the well body in contact with the soil body, and enhance the friction force of connection. Effectively avoid ordinary concrete inspection shaft from the root because subside and the road surface arch or the sunken that groundwater caused.

2. The UHPC material is adopted as the main material of the well body, the ultrahigh impermeability and the ultrahigh wear resistance of the UHPC material are very favorable for preventing cracking and structural durability of the inspection well, the structural service life of the large inspection well is greatly prolonged, the corrosion resistance of the UHPC material is strong, the corrosion of common chemical corrosion substances of a drainage pipeline can be effectively resisted, the surface of the UHPC material is smoother and more compact than that of common concrete, and compared with the common concrete inspection well, the UHPC material is less prone to sticking, hanging impurities, stacking and blocking, and the UHPC pipe well has high strength and can be buried deeply in a river channel, an urban underground pipe gallery and the like.

3. The invention adopts the design of the round well body, has more reasonable stress and saves more materials than the traditional rectangular inspection well.

4. The invention can adopt a non-steel bar component design, fully utilizes the characteristic of high tensile property of the UHPC base material, not only saves the consumption of steel materials, but also simplifies the construction process.

Drawings

FIG. 1 is a picture of a real object of a manhole cover and a manhole cover sinking after cracking, damage and sinking of a road surface around the manhole cover of an existing inspection well;

FIG. 2 is a picture of a real object of a prior inspection well with a large difference between the installation elevation of the well lid and the elevation of the pavement, a protruding well surface and a peeled asphalt layer around a well ring;

FIG. 3 is a picture of a real object of the loose well lid of the existing inspection well;

FIG. 4 is a picture of a well cover damaged by an infirm or loose anchoring of a well frame of a conventional inspection well;

FIG. 5 is an elevation view of a prior art fabricated manhole;

FIG. 6 is a top plan view of the manhole of the present invention;

FIG. 7 is a cross-sectional view I-I of the manhole of FIG. 6;

FIG. 8 is a sectional view II-II of the manhole of FIG. 6;

fig. 9 is an enlarged view of a portion a of fig. 7 and 8;

fig. 10 is an enlarged view of a portion B of fig. 7 and 8;

FIG. 11 is a schematic representation of a first inspection well construction step of the present invention;

FIG. 12 is a schematic view of a second inspection well construction step of the present invention;

FIG. 13 is a schematic view of a third inspection well construction step of the present invention;

FIG. 14 is a schematic illustration of a fourth inspection well construction step of the present invention;

FIG. 15 is a schematic illustration of a fifth inspection well construction step of the present invention;

FIG. 16 is a schematic illustration of a sixth inspection well construction step of the present invention;

description of reference numerals:

the prior art is as follows:

a, a bottom shaft, b, a connecting pipe shaft, c, an adjusting shaft and d, a shaft seat;

the invention

1-UHPC bottom plate, 2-first UHPC well body, 3-second UHPC well body, 4-third UHPC well body, 5-UHPC well base, 6-well cover, 7-pouring concrete, 8-splicing seam, 9-ground and 10-water stop rubber ring; 11-a first outer edge; h-lower section; i-a longitudinal joint plane; 12-a second outer edge; j-upper section; 13-steel sheet pile support, 14-concrete pouring, 15-pipeline and 16-extra-well backfill.

Detailed Description

The technical solutions of the present invention will be described in detail below with reference to the accompanying drawings and examples so that those skilled in the art can better understand and implement the technical solutions of the present invention.

As shown in fig. 6 to 10, an assembled round UHPC large-scale rainwater and sewage inspection well comprises a UHPC bottom plate 1, a first UHPC well body 2, a second UHPC well body 3, a third UHPC well body 4, a UHPC well seat 5 and a well cover 6 arranged on the UHPC well seat 5 from bottom to top, wherein the well cover 6 is flush with the ground 9, the first UHPC well body 2, the second UHPC well body 3, the third UHPC well body 4 and the UHPC well seat 5 are sequentially connected through a rabbet structure which is accurately bonded and butted, a longitudinal joint face i of the rabbet structure is obliquely arranged and can be a conical surface or an inclined surface, a transverse joint face of the rabbet structure is a horizontal plane, wherein as shown in fig. 10, rabbet openings at the upper end of the first UHPC well body 2, the upper end of the second UHPC well body 3 and the upper end of the third UHPC well body 4 are all holes, the boss is provided with a first outer edge 11 protruding from the outer wall of the first UHPC well body, a lower section h of the first outer edge 11 is obliquely arranged, a second UHPC well body 3 and a lower end of the second UHPC well body 4 are provided with a rabbet 12, a lower end of the second UHPC well body is connected with a groove 12, and a second UHPC bottom groove 12 is arranged between the second groove of the UHPC base plate, and a second groove is provided with a groove 12.

As a preferred embodiment: the UHPC bottom plate 1, the first UHPC well body 2, the second UHPC well body 3, the third UHPC well body 4 and the UHPC well seat 5 are all formed by prefabricating and pouring UHPC materials, the axial compressive strength of the UHPC materials is more than or equal to 130MPa, the axial tensile strength is more than or equal to 7MPa, and the fiber volume mixing amount is more than or equal to 2%.

The overall well body of the inspection well is in a ring shape, the outer diameter of the well body is larger than 3 meters, the wall thickness of the well body is larger than or equal to 100mm and smaller than or equal to 150mm, the circular well body design is adopted, the stress is more reasonable, and compared with the traditional rectangular inspection well, the material is saved.

Specifically, the slope of the longitudinal joint face i of the tongue-and-groove structure is 4: 1 to 5: 1.

The slope of the lower section h of the first outer edge 11 of the boss is 2: 1.

The slope of the upper section j of the second outer edge 12 of the notch is 2: 1.

The construction steps of the present invention are as shown in figures 11 to 15,

the construction method comprises the following steps: erecting a steel sheet pile support 13 on site, excavating to a design standard height, and pouring a C20 plain concrete cushion layer with the thickness of 10cm at the bottom of an inspection well to form pouring concrete 14 shown in the figure 11;

and a second construction step: as shown in fig. 12, a prefabricated UHPC floor 1 is placed on site, and then a first UHPC well 2 is assembled on the UHPC floor 1;

and a third construction step: as shown in fig. 13, a second UHPC wellbore 3 is assembled;

the construction step four: referring to fig. 14, a third UHPC well bore 4 and UHPC well seat 5 are assembled;

the construction step five: referring to fig. 15, C20 concrete with a thickness of 20cm is poured into the bottom of the inspection well to form poured concrete 7, and a pipeline 15 is spliced;

the construction step six: referring to fig. 16, the outside of the inspection well is filled with the outside backfill 16, and the steel pipe pile is pulled out.

In the embodiment, referring to fig. 9 and 10, a splicing seam 8 between an upper tongue-and-groove and a lower tongue-and-groove of the tongue-and-groove structure is provided with a water-stop rubber ring 10 for impermeable sealing. The outer edge of the rabbet of the UHPC well seat 5 is consistent with the outer contour line of the rabbet at the upper end of a third UHPC well body 4. The diameter of a hole reserved between the first UHPC well body 2 and the second UHPC well body 3 is 40mm larger than that of the pipeline 15, the pipeline 15 and the hole of the well body are filled with 1: 2 dispersed expanded cement mortar, and the surface of an interface is roughened before filling.

The above-mentioned embodiments are merely preferred embodiments of the present invention, but should not be construed as limiting the invention, and any variations and modifications based on the concept of the present invention should fall within the scope of the present invention, which is defined by the claims.

Claims (7)

1. The utility model provides a large-scale rain sewage inspection shaft of circular UHPC of assembled which characterized in that: the well comprises a UHPC bottom plate, a first UHPC well body, a second UHPC well body, a third UHPC well body and a UHPC well seat which are arranged from bottom to top, wherein the UHPC well seat is provided with a well cover, the first UHPC well body, the second UHPC well body, the third UHPC well body and the UHPC well seat are sequentially connected through a tongue-and-groove structure which is accurately bonded and butted, the longitudinal joint surface of the tongue-and-groove structure is obliquely arranged, the transverse joint surface of the tongue-and-groove structure is a horizontal surface, the tongue-and-groove at the upper end of the first UHPC well body, the upper end of the second UHPC well body and the upper end of the third UHPC well body are bosses, the bosses are provided with first outer edges protruding out of the outer wall of the well body, the lower cross section of the first outer edges is obliquely arranged, the lower ends of the second UHPC well body and the third UHPC well body are notches, the notches are provided with second outer edges protruding out of the outer wall of the well body, the upper cross section of the second outer edges is obliquely arranged, the lower end of the first UHPC well body is embedded in the UHPC well body, and a groove is connected with a second pre-reserved pipeline.

2. The large-scale rain sewage inspection shaft of circular UHPC of assembled of claim 1, characterized by that: the UHPC bottom plate, the first UHPC well body, the second UHPC well body, the third UHPC well body and the UHPC well seat are all formed by prefabricating and pouring UHPC materials, the axial compressive strength of the UHPC materials is more than or equal to 130MPa, the axial tensile strength is more than or equal to 7MPa, and the fiber volume mixing amount is more than or equal to 2%.

3. The large-scale rain sewage inspection shaft of circular UHPC of assembled of claim 2, characterized by that: the overall well body of the inspection well is circular, the outer diameter of the well body is larger than 3 meters, and the wall thickness of the well body is larger than or equal to 100mm and smaller than or equal to 150mm.

4. The assembled circular UHPC large-scale rain sewage inspection well of claim 3, wherein: the slope of the longitudinal joint face of the tongue-and-groove structure is 4: 1 to 5: 1.

5. The large-scale rain sewage inspection shaft of circular UHPC of assembled of claim 4, characterized by that: the slope of the lower section of the first outer edge of the boss is 2: 1.

6. The assembled circular UHPC large-scale rain sewage inspection well of claim 5, wherein: the slope of the upper section of the second outer edge of the notch is 2: 1.

7. The large-scale rain sewage inspection well of circular UHPC of assembled of any one of claims 1 to 6, characterized in that: and a water-stopping rubber ring is arranged between the upper rabbet and the lower rabbet of the rabbet structure for anti-seepage sealing.

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