CN112227502A - Drainage inspection well construction method - Google Patents
Drainage inspection well construction method Download PDFInfo
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- CN112227502A CN112227502A CN202011172069.4A CN202011172069A CN112227502A CN 112227502 A CN112227502 A CN 112227502A CN 202011172069 A CN202011172069 A CN 202011172069A CN 112227502 A CN112227502 A CN 112227502A
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/02—Manhole shafts or other inspection chambers; Snow-filling openings; accessories
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
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Abstract
The invention relates to a drainage inspection well construction method. The construction method of the drainage inspection well sequentially comprises the following steps: constructing a cushion layer; well chamber construction; mounting a cover plate; plugging the opening of the cover plate by using a temporary steel plate; constructing a road bed; constructing a lime soil subbase layer; constructing the lower layer of the water stabilization base layer; constructing the upper layer of the water-stabilized base layer; constructing an asphalt lower surface layer, reversely excavating, integrally pouring shaft and wellhead reinforced concrete and fixing a well cover; constructing an upper asphalt layer; the anti-grooving of anti-excavation is the reducing groove, consolidates the groove section including pit shaft groove section and well head, and the top and the lime soil subbase layer scale line parallel and level of pit shaft groove section, the top of well head reinforcement groove section and the scale line parallel and level on the stable basic unit upper strata of water, well head reinforcement groove section's the groove width is greater than the groove width of pit shaft groove section, adopts the same model concrete to pour simultaneously in pit shaft groove section and the well head reinforcement groove section. And a procedure is adopted to replace four procedures in the traditional construction method, so that the times of alternative operation of different teams and groups are reduced, and the construction period and the construction cost are reduced.
Description
Technical Field
The invention belongs to the technical field of inspection well construction in constructional engineering, and particularly relates to a drainage inspection well construction method.
Background
The drainage pipe network is a component of a municipal road pipe network system, and the drainage inspection well is one of main auxiliary structures of the drainage pipe network, consists of a well seat, a shaft, a well cover, relevant accessories and the like, is generally arranged at a pipeline intersection, a turning part, a pipe diameter or gradient changing part and a linear pipe section at intervals, and is convenient for periodically inspecting the auxiliary structures.
The traditional drainage inspection well is constructed according to the following steps: the method comprises the following steps of cushion layer → well room → cover plate installation → temporary steel plate plugging of cover plate hole → road bed → lime soil subbase layer → reverse excavation of lime soil, prefabricated shaft installation, tamping around the shaft → temporary steel plate plugging of shaft hole → lower layer of cement stabilized base layer → upper layer of cement stabilized base layer → reverse excavation, reinforced concrete shaft hole reinforcement → temporary steel plate plugging of shaft hole → lower layer of asphalt → fixed installation of shaft cover → upper layer of asphalt. Generally, a lower layer of a cement stabilized base layer, an upper layer of the cement stabilized base layer, a lower asphalt surface layer and an upper asphalt surface layer are the contents of professional team and team grouping construction of a pavement; the rest procedures are the construction contents of the drainage pipe network labor operation teams and groups, under the traditional construction procedures, the sub-team group of the pavement operation and the drainage pipe network labor operation teams and groups need to perform alternate operation, the number of times of the alternate operation is large, the service time of manpower and machinery is increased, the construction operation period is improved in a phase-changing manner, and the construction cost is also improved; each construction procedure of the inspection well has allowable positive and negative deviations in the specification, and when the times of alternate operation of the road surface operation sub-package team and the drainage pipe network labor operation team are more, the accumulated error is also larger; in addition, the traditional construction process needs to carry out reverse excavation twice, and the Regulare is not easy to be compacted.
Disclosure of Invention
In view of the above, the present invention provides a drainage inspection well construction method, so as to solve the technical problems of the existing drainage inspection well, such as the increase of construction period, construction cost and construction error caused by the increase of the number of times of alternate operations of different teams and groups during construction, the increase of the number of times of reverse excavation during construction of the existing drainage inspection well, and the difficulty in compacting the backfill around Regu.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a drainage inspection well construction method comprises the following steps:
s1, constructing a cushion layer;
s2, constructing a well room;
s3, mounting a cover plate;
s4, plugging the opening of the cover plate by using a temporary steel plate;
s5, constructing a road bed;
s6, constructing a lime soil subbase layer;
s7, constructing the lower layer of the cement stabilized base;
s8, constructing the upper layer of the cement stabilized base;
s9, constructing an asphalt lower layer;
s10, reverse excavation, integral pouring of shaft and wellhead reinforced concrete and construction of a fixed well lid;
s11, constructing an upper asphalt layer;
in step S10, the reverse excavation groove of the reverse excavation is a variable diameter groove, and includes a shaft groove section and a wellhead reinforcing groove section located above the shaft groove section, the top of the shaft groove section is flush with the level of the lime soil sub-base layer, the top of the wellhead reinforcing groove section is flush with the level of the upper layer of the cement stabilized base layer, the groove width of the wellhead reinforcing groove section is greater than the groove width of the shaft groove section, a shaft inner formwork is coaxially installed in the shaft groove section, the top of the shaft inner formwork extends out of the lower layer of the asphalt, and when concrete is poured, the space between the shaft inner formwork and the shaft groove section and the space between the shaft inner formwork and the wellhead reinforcing groove section are poured simultaneously by using the same type concrete.
The beneficial effects of the above technical scheme are: in the drainage inspection well construction method, one procedure of reverse excavation, integral pouring of shaft and wellhead reinforced concrete and fixed well lid construction is adopted to replace 'reverse excavation of lime soil, installation of prefabricated shaft and tamping around the shaft' in the traditional construction method; reverse excavation and reinforced concrete wellhead reinforcement; temporary steel plate plugging of a wellhead; the manhole cover is fixedly installed with four working procedures, so that the construction working procedures are reduced, the times of alternate operation of different operation teams are further reduced, the different operation teams can complete the construction operation once or less, the construction period is correspondingly reduced, the reduced construction period shortens the use time of labor and machinery for the different operation teams, and the effects of reducing the construction cost and shortening the construction period are achieved; in addition, because each construction process specification of the drainage inspection well has allowable positive and negative deviations, the drainage inspection well construction method of the invention replaces four processes in the drainage inspection well construction method in the prior art by one process, so that the accumulated error generated by the four processes in the traditional construction method can be effectively solved; the drainage inspection well construction method reduces the times of reverse excavation, reduces disturbance to a dense structural layer at the periphery of the drainage inspection well, improves the backfill density at Regularsda, and effectively avoids the occurrence of non-uniform settlement at Regularsda; adopt the cast in situ pit shaft to replace traditional prefabricated pit shaft, the pit shaft is pour and the well head reinforcement can go on simultaneously, and the maintenance makes pit shaft, well head reinforcement and well lid installation as an organic whole simultaneously.
Further, before the concrete is poured in step S10, a reinforcing steel bar framework is placed in the wellhead reinforcing groove section, and the reinforcing steel bar framework is used for supporting the manhole cover of the manhole and reinforcing the wellhead of the manhole.
Has the advantages that: because the well lid of drainage inspection shaft has great weight, when setting up the reinforcement steel bar framework and supporting the well lid, at the in-process of concreting maintenance, the well lid can not sink to behind the construction pitch upper surface, can guarantee the roughness that well lid and pitch upper surface connect stubble department.
Further, the concrete pouring in the step S10 is performed in two times, the first concrete pouring is performed at the elevation position where the top of the reinforcing steel bar framework is located, the shaft inner formwork is taken out, the well cover of the drainage inspection well is placed at the top of the reinforcing steel bar framework, the second concrete pouring is performed around the well cover, and the second concrete pouring is performed at the elevation position of the asphalt lower surface layer.
Has the advantages that: adopt twice concrete placement, help the installation of drainage inspection shaft well lid, guarantee the firm nature that the well lid is fixed.
Further, the reinforcing steel bar framework comprises support ribs uniformly arranged along the circumferential direction of the shaft, inner ring ribs sleeved outside the support ribs and connected with the support ribs, outer ring ribs arranged radially of the shaft and spaced from the inner ring ribs, and a stirrup steel bar framework connected with the inner ring ribs and the outer ring ribs.
Has the advantages that: the weight of the well cover of the drainage inspection well can be uniformly dispersed, the support stability of the well cover of the drainage inspection well is ensured, the sinking of the well cover of the drainage inspection well in the concrete pouring process is effectively avoided, and the horizontal sliding cannot occur when the paver is used for paving; the reinforcing effect on the wellhead of the drainage inspection well is guaranteed.
Drawings
FIG. 1 is a schematic view showing a structure of a drainage inspection well in a method for constructing a drainage inspection well according to the present invention;
fig. 2 is a schematic view of a wellhead reinforcing structure of a drainage inspection well in the construction method of the drainage inspection well.
Description of reference numerals: 1-shaft, 2-well cover, 3-well seat, 4-lime soil subbase layer, 5-cement stable base layer upper layer, 6-cement stable base layer lower layer, 7-asphalt lower layer, 8-asphalt upper layer, 9-shaft groove section, 10-shaft mouth reinforcing groove section, 11-support rib, 12-C30 concrete, 13-shaft inner template, 14-reverse digging groove, 15-inner annular rib, 16-outer annular rib and 17-stirrup.
Detailed Description
The invention is described in further detail below with reference to the drawings and the detailed description.
The construction method of the drainage inspection well comprises the following specific embodiments:
the construction process of the drainage inspection well comprises the following steps:
s1, constructing a cushion layer;
s2, constructing a well room;
s3, mounting a cover plate;
s4, plugging the opening of the cover plate by using a temporary steel plate;
s5, constructing a road bed;
s6, constructing a lime-soil subbase (a cement lime stabilized soil subbase);
s7, constructing a lower layer of the cement fly ash stabilized macadam;
s8, constructing the upper layer of the cement fly ash stabilized macadam base layer;
s9, constructing an asphalt lower layer;
s10, reverse excavation, integral pouring of shaft and wellhead reinforced concrete and construction of a fixed well lid;
and S11, constructing the upper layer of the asphalt.
During actual construction, the lower cement stabilized base layer, the upper cement stabilized base layer, the lower asphalt surface layer and the upper asphalt surface layer are the construction contents of the professional sub-team and team groups of the pavement, and the rest are the construction contents of the labor operation team and team groups of the drainage pipe network. Specifically, referring to fig. 1, after the asphalt lower layer 7 is constructed, reverse excavation is directly performed downwards from the asphalt lower layer 7 within a radius range set at a wellhead position, the size of a reverse excavation groove 14 is designed into a reducing groove according to a drawing, and the cross section of the reverse excavation groove is entirely step-shaped and comprises a shaft groove section 9 and a wellhead reinforcing groove section 10 which are communicated with each other. The wellhead reinforcing groove section 10 is located above the shaft groove section 9, and the groove width of the wellhead reinforcing groove section 10 is larger than that of the shaft groove section 9. The top of the shaft groove section 9 is flush with the standard lines of the lime soil subbase layer 4, and the top of the wellhead reinforcing groove section 10 is flush with the standard lines of the upper layer 5 of the cement stabilized base layer.
After the reverse excavation, clear away the waste material that grey soil subbase 4, the firm basic unit lower floor of water 6, the firm basic unit upper strata of water 5 and pitch lower surface 7 produced totally, guarantee the level and smooth of the 14 cell walls of reverse excavation, only need this moment to reverse 14 interior installation pit shaft inner formworks of excavation can, concrete can effectively combine with grey soil subbase 4, the firm basic unit lower floor of water 6, the firm basic unit upper strata of water 5 and pitch lower surface 7 when pouring concrete, need not to set up the pit shaft exterior sheathing this moment.
The method needs to pour concrete in the space between the shaft inner template 13 and the shaft groove section 9 and the space between the shaft inner template 13 and the wellhead reinforcing groove section 10, and C30 concrete 12 with the same model is adopted and poured simultaneously, so that maintenance can be carried out simultaneously, and time is saved. When consolidating the well head, set up the reinforcement steel skeleton in well head reinforcement groove section 10, as shown in fig. 1 and fig. 2, the reinforcement steel skeleton includes the brace rod 11 that evenly arranges along the circumference of pit shaft 1, the cover is established in each brace rod 11 outside and with each brace rod 11 welded inner ring muscle 15, the radial outer loop muscle 16 with 15 interval arrangements of inner ring muscle in pit shaft 1 and simultaneously with inner loop muscle 15 and outer loop muscle 16 through binding connection's stirrup 17. Wherein, the inner ring muscle 15 and the outer ring muscle 16 are all equipped with two along the axial of pit shaft 1 interval from top to bottom. The supporting ribs 11 are three and form three stable supporting points to support the well seat 3 integrally formed on the well lid 2, and the connecting line of the three supporting points forms an equilateral triangle to ensure the stable support and positioning of the well seat 3. The stirrup 17 is in a quadrilateral shape, so that the strength of the whole reinforced steel bar framework is ensured. The inner ring rib 15 and the outer ring rib 16 are flush with the tops of the support rib 11 and the stirrup 17. After concrete is poured, when the strength reaches a certain degree, the well cover 2 with larger weight cannot sink under the support of the support ribs 11, so that the flatness of the joint of the well cover 2 and the asphalt upper surface layer 8 is ensured.
The concrete pouring in the method is carried out twice, the concrete is poured to the elevation position where the top of the supporting rib 11 is located when the concrete is poured for the first time, when the concrete curing reaches the form removal condition, the shaft inner formwork 13 is taken out, the well cover 2 of the drainage inspection well is placed at the top of the supporting rib 11, then the concrete pouring is carried out for the second time around the well cover 2, and the concrete pouring is carried out for the second time to the elevation position of the asphalt lower surface layer 7. After the maintenance is completed, the upper asphalt layer 8 can be laid.
It should be noted that the asphalt sub-surface 7 is replaced by C30 concrete only within a set radius around the wellhead, and the rest of the positions still have the asphalt sub-surface. In addition, the construction processes not described in detail in the present invention are all the prior art, and are well known to those skilled in the art, and therefore, are not described in detail in this embodiment.
In the drainage inspection well construction method, one procedure of reverse excavation, integral pouring of shaft and wellhead reinforced concrete and fixed well lid construction is adopted to replace 'reverse excavation of lime soil, installation of prefabricated shaft and tamping around the shaft' in the traditional construction method; reverse excavation and reinforced concrete wellhead reinforcement; temporary steel plate plugging of a wellhead; well lid fixed mounting "four processes have reduced the construction operation process, and then have reduced the number of times that road surface specialty divides packet team and drainage pipe network labor operation team and team alternate operation, make two operation teams can once only or just can accomplish the construction operation for a short time to the corresponding construction cycle that reduces, the construction cycle that reduces all has to shorten manual work, mechanical live time to different operation teams, plays the effect that reduces construction cost, shortens construction cycle. In addition, because each construction process specification of the drainage inspection well has allowable positive and negative deviations, the drainage inspection well construction method provided by the invention replaces four processes in the drainage inspection well construction method in the prior art by one process, so that the accumulated error generated by the four processes in the traditional construction method can be effectively solved. The drainage inspection well construction method only adopts once reverse excavation, and the shaft is cast in situ during construction, compared with the traditional twice reverse excavation and the prefabricated shaft, the reverse excavation times are reduced, so that the disturbance to the peripheral dense structural layer of the drainage inspection well is reduced, the backfill density at Regena is improved, the backfill quality at Regena is effectively ensured, and the non-uniform settlement at Regena is avoided; adopt the cast in situ pit shaft to replace traditional prefabricated pit shaft, can avoid the construction error that prefabricated pit shaft brought at the site operation, also make the pit shaft pour and the well head reinforcement can go on simultaneously, the maintenance simultaneously, pit shaft, well head reinforcement and well lid installation are as an organic whole, and the well lid can avoid the level to slide, guarantees the roughness of well lid and pitch upper surface layer stubble department, promotes appearance quality.
The above-described embodiments of the present invention do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (4)
1. A drainage inspection well construction method is characterized by comprising the following steps:
s1, constructing a cushion layer;
s2, constructing a well room;
s3, mounting a cover plate;
s4, plugging the opening of the cover plate by using a temporary steel plate;
s5, constructing a road bed;
s6, constructing a lime soil subbase layer;
s7, constructing the lower layer of the cement stabilized base;
s8, constructing the upper layer of the cement stabilized base;
s9, constructing an asphalt lower layer;
s10, reverse excavation, integral pouring of shaft and wellhead reinforced concrete and construction of a fixed well lid;
s11, constructing an upper asphalt layer;
in step S10, the reverse excavation groove of the reverse excavation is a variable diameter groove, and includes a shaft groove section and a wellhead reinforcing groove section located above the shaft groove section, the top of the shaft groove section is flush with the level of the lime soil sub-base layer, the top of the wellhead reinforcing groove section is flush with the level of the upper layer of the cement stabilized base layer, the groove width of the wellhead reinforcing groove section is greater than the groove width of the shaft groove section, a shaft inner formwork is coaxially installed in the shaft groove section, the top of the shaft inner formwork extends out of the lower layer of the asphalt, and when concrete is poured, the space between the shaft inner formwork and the shaft groove section and the space between the shaft inner formwork and the wellhead reinforcing groove section are poured simultaneously by using the same type concrete.
2. The drainage inspection well construction method according to claim 1, wherein a reinforcing steel bar skeleton is placed in the wellhead reinforcing groove section before concrete is poured in the step S10, and the reinforcing steel bar skeleton is used for supporting a well cover of the inspection well and reinforcing the wellhead of the inspection well.
3. The drainage inspection well construction method according to claim 2, wherein the concrete casting in the step S10 is performed in two steps, the concrete is cast for the first time to an elevation position where the top of the reinforcing steel bar framework is located, the shaft inner formwork is taken out and the well cover of the drainage inspection well is placed on the top of the reinforcing steel bar framework, and the concrete casting is performed for the second time around the well cover and the concrete casting is performed for the second time to an elevation position of the asphalt lower surface layer.
4. The drainage inspection well construction method according to claim 2 or 3, wherein the reinforcing steel bar framework comprises supporting bars uniformly arranged along the circumferential direction of the shaft, inner ring bars sleeved outside the supporting bars and connected with the supporting bars, outer ring bars arranged at intervals from the inner ring bars in the radial direction of the shaft, and stirrups connected with the inner ring bars and the outer ring bars simultaneously.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113187026A (en) * | 2021-05-10 | 2021-07-30 | 浙江万里建设工程有限公司 | Open caisson construction method and reinforcing mold for integrated prefabricated pump station |
| CN113323021A (en) * | 2021-04-22 | 2021-08-31 | 中电(山东)电力科技有限公司 | Cover plate formwork structure and cover plate manufacturing method |
| CN113688457A (en) * | 2021-08-24 | 2021-11-23 | 广联达科技股份有限公司 | Modeling method, device and equipment of well periphery reinforcement model and readable storage medium |
| CN116145731A (en) * | 2022-12-30 | 2023-05-23 | 中铁一局集团有限公司 | Inverted anti-sedimentation manhole cover construction method |
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| CN112227502B (en) | 2022-11-08 |
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