CN114592581A - Large-diameter inspection well pile drilling method construction method - Google Patents
Large-diameter inspection well pile drilling method construction method Download PDFInfo
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- CN114592581A CN114592581A CN202210206387.0A CN202210206387A CN114592581A CN 114592581 A CN114592581 A CN 114592581A CN 202210206387 A CN202210206387 A CN 202210206387A CN 114592581 A CN114592581 A CN 114592581A
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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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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
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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 discloses a pile drilling method construction method for a large-diameter inspection well, which comprises the steps of drilling and digging by a drilling machine to form a basic well with a target aperture and a target depth; after the drilling machine is withdrawn, installing a steel casing into the foundation well; pumping mud within the base well out of the base well; and (3) filling the conical bottom of the foundation well by adopting rock blocks, and forming a bottom foundation on the upper part of the formed stone throwing layer by adopting cement stone chips. The construction method provided by the application only needs drilling for forming holes and prefabricating the inspection well for installation, and the construction time of a single large-diameter inspection well is shortened to 1 day. Construction only needs to satisfy the drilling stake machinery jack-up can, especially the drilling stake machine after the improvement adopts crawler-type chassis, has further reduced the required space of operation, more adapts to narrow road environment. The construction time is greatly shortened, the space required by construction is reduced, the traffic blockage caused by construction is quickly recovered, and the interference of construction on traffic is minimized.
Description
Technical Field
The invention relates to the technical field of inspection well construction, in particular to a pile drilling method construction method for a large-diameter inspection well.
Background
The inspection well is a well-shaped structure which is formed by integrally injection molding or bricking plastic for facilitating periodic inspection, cleaning and dredging or operation inspection for going into a well, wherein the outer diameter of an underground drainage pipeline embedded in a building district (a residential district, a public building district, a factory district and the like) is not more than 800mm, and the embedding depth is not more than 6m, the inspection well is generally arranged at a drainage pipeline intersection, a turning place, a pipe diameter or gradient changing place, a drop place and the like.
In the construction of urban water supply and drainage pipe networks, a newly-built large-diameter (diameter: 2m) inspection well is usually required to be used as a pipe network connection node during construction, and if a road is narrow and is a unique travel road for surrounding residents on a construction site, the requirements on the construction period and the road traffic are high. The traditional construction method of the large-diameter inspection well comprises reverse construction method construction and open caisson construction, the construction methods have the problems of complex construction procedures, long construction time, large construction operation area and the like, the current situation of partial work sites cannot be adapted, and rapid construction cannot be guaranteed and the passing of surrounding residents can be recovered as early as possible.
Disclosure of Invention
The invention provides a pile drilling method construction method for a large-diameter inspection well.
The invention provides the following scheme:
a pile drilling method construction method for a large-diameter inspection well comprises the following steps:
drilling and excavating by using a drilling machine to form a basic well with a target aperture and a target depth;
after the drilling machine is withdrawn, installing a steel casing into the foundation well;
pumping mud within the base well out of the base well;
the conical bottom of the foundation well is filled with rock blocks and cement stone chips are adopted at the upper part of the formed stone throwing layer to form a bottom foundation;
installing a pre-cast wellbore to the interior of the steel casing;
filling a gap between the steel casing and the prefabricated shaft by adopting cement stone chips;
and after the filling is finished, the steel casing is pulled out of the foundation well, so that the pavement is recovered according to the current situation of the well after the construction of the sewage pipe network and the interior of the prefabricated shaft is finished.
Preferably: and drilling and digging a basic well with a target aperture and a target depth by adopting a crawler-type drilling machine.
Preferably: and pumping the slurry in the basic well to the outside of the basic well, and filling a gap between the steel casing and the well wall of the basic well by adopting cement and stone chips.
Preferably: and (3) adopting rock blocks to fill the conical bottom hole of the foundation well and adopting cement stone chips to fill gaps of the rock blocks.
Preferably: and installing the prefabricated shaft and the well lid to the inside of the steel casing.
Preferably: the prefabricated shaft comprises a plurality of sections, and water-stop rubber rings are arranged between every two adjacent sections of the prefabricated shaft and between the well cover and the adjacent shaft and are filled with mortar.
Preferably: the mortar is 1:2 waterproof cement grouting mortar or polyurethane blended cement mortar.
Preferably: and filling a gap between the steel casing and the prefabricated shaft by adopting cement stone chips in a manner of symmetrically filling along the prefabricated shaft.
Preferably: and after the filling is finished, pulling out the steel casing from the foundation well, and filling a gap between the prefabricated shaft and the wall of the foundation well by adopting cement stone chips.
Preferably: the cement stone chips are 20 percent of cement stone chips.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
by the invention, a pile drilling method construction method for the large-diameter inspection well can be realized, and in an implementation mode, the method can comprise the steps of drilling and digging by a drilling machine to form a basic well with a target aperture and a target depth; after the drilling machine is withdrawn, installing a steel casing into the foundation well; pumping mud within the base well out of the base well; the conical well bottom of the foundation well is filled by adopting rock blocks and the upper part of the formed riprap layer is formed into a well bottom foundation by adopting cement stone chips; installing a pre-cast wellbore to the interior of the steel casing; filling a gap between the steel casing and the prefabricated shaft by adopting cement stone chips; and after the filling is finished, the steel casing is pulled out of the foundation well, so that the pavement is recovered according to the current situation of the well after the construction of the sewage pipe network and the interior of the prefabricated shaft is finished. The construction method provided by the application only needs drilling for forming holes and prefabricating the inspection well for installation, and the construction time of a single large-diameter inspection well is shortened to 1 day. Construction only needs to satisfy the drilling stake machinery jack-up can, especially the drilling stake machine after the improvement adopts crawler-type chassis, has further reduced the required space of operation, more adapts to narrow road environment. The construction time is greatly shortened, the space required by construction is reduced, the traffic blockage caused by construction is quickly recovered, and the interference of construction on traffic is minimized.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic illustration of a drilling rig in place provided by an embodiment of the present invention;
FIG. 2 is a schematic diagram of a foundation well construction provided by an embodiment of the present invention;
FIG. 3 is a schematic view of a steel casing installation provided by an embodiment of the invention;
FIG. 4 is a schematic representation of a downhole foundation construction provided by an embodiment of the present invention;
FIG. 5 is a schematic illustration of a prefabricated wellbore installation provided by an embodiment of the present invention;
FIG. 6 is a schematic illustration of gap filling around a pre-fabricated wellbore provided by an embodiment of the present invention;
FIG. 7 is a schematic drawing of a steel casing according to an embodiment of the present invention;
fig. 8 is a schematic view of a road surface restoration provided by an embodiment of the present invention.
In the figure: the device comprises a drilling machine 1, a foundation well 2, a steel casing 3, a rubble layer 4, a well bottom foundation 5, a prefabricated shaft 6, a well cover 7 and a road surface 8.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
Examples
Referring to fig. 1, 2, 3, 4, 5, 6, 7, and 8, a method for constructing a large-diameter inspection well pile by drilling according to an embodiment of the present invention, as shown in fig. 1, 2, 3, 4, 5, 6, 7, and 8, may include:
drilling and excavating by using a drilling machine 1 to form a basic well 2 with a target aperture and a target depth; specifically, in order to further reduce the floor space of each equipment during excavation, the embodiment of the present application may provide a base well that is drilled and excavated by using a crawler-type drilling machine to form a target aperture and a target depth.
After the drilling machine 1 is withdrawn, installing a steel casing 3 into the foundation well 2;
pumping mud from within the base well 2 out of the base well 2; specifically, after slurry in the foundation well 2 is pumped out of the foundation well 2, cement and stone chips are adopted to fill a gap between the steel casing 3 and the well wall of the foundation well 2.
The conical bottom of the foundation well 2 is filled with rock blocks and the upper part of the formed riprap layer 4 is formed with cement stone chips to form a bottom foundation 5; in order to enable the obtained bottom hole foundation strength to meet requirements, the conical bottom hole of the foundation well is filled with rock blocks and gaps of the rock blocks are filled with cement stone chips.
Installing a prefabricated wellbore 6 to the interior of the steel casing 3; in practical application, a prefabricated shaft 6 and a well lid 7 are installed inside the steel casing 3. The prefabricated shaft 6 comprises a plurality of sections, and water-stop rubber rings are arranged between every two adjacent sections of the prefabricated shafts and between the well cover and the adjacent shaft and are filled with mortar. The mortar is 1:2 waterproof cement grouting mortar or polyurethane blended cement mortar.
Filling a gap between the steel casing 3 and the prefabricated shaft 6 by adopting cement stone chips; and in order to stabilize the filled formed well body, filling the gap between the steel casing and the prefabricated well shaft by adopting cement stone chips in a manner of symmetrically filling along the prefabricated well shaft.
And after the filling is finished, the steel casing 3 is pulled out from the foundation well 2, so that the pavement can be recovered according to the current situation of the well after the construction of the sewage pipe network and the interior of the prefabricated shaft is finished. After filling, the steel casing is pulled out of the foundation well, and then a gap between the prefabricated shaft and the wall of the foundation well is filled with cement and stone chips. Wherein the cement stone chips used may be 20% cement stone chips.
The following description will be made in detail by taking an example of construction performed on a certain construction site by the method provided in the present application.
1. Preparation for construction
(1) Technical preparation: technical personnel are familiar with relevant drawings and specification requirements, construction workers must firstly carry out corresponding technical training, and the training contents comprise design drawings, construction key points, protective measures and the like.
(2) Elevation rechecking: and (4) measuring and setting off, and checking the well position by using a total station and performing elevation recheck by using a level gauge.
(3) Clearing the site: the method has the advantages that plant root systems such as tree roots, turf and the like in the construction range are removed, the pavement is removed when the pavement needs to be removed, and sundries such as rock blocks, construction waste and the like in soil are cleaned, so that a drilling machine can drill down conveniently.
2. Drill in place
The drilling machine is crawler-type self-walking equipment, after the drilling machine walks to the position near the pile position, the drilling bit is centered on the hole position, the center of the drilling bit tip and the center of the cross line are manually centered according to the cross line of the pile position, and the verticality of the mast and the level of the body of the drilling machine are adjusted.
3. Drilling construction is performed as shown in fig. 1 and 2.
(1) Preparing slurry, wherein the mixing proportion and the preparation method of the slurry are determined through tests;
(2) moving the drilling machine to the central point of the drilled hole, and drilling down;
(3) and the drilling machine operates and drills to the designed elevation.
4. Mounting protective sleeve and pumping slurry
And (4) after the foundation well construction is completed by drilling in place, withdrawing the drilling machine and hoisting the steel casing (the height of each section of steel casing is prefabricated in advance according to the actual situation on site). After the steel casing is installed, slurry in the well is pumped and transported to a specified place, and a gap between the well wall and the steel casing is filled and compacted by using 20% of cement stone chips.
5. Foundation and foundation construction are shown in fig. 3 and 4.
The conical bottom hole formed by drilling and digging of the drill bit is filled with rock blocks, the filling depth is 80cm, and gaps among the rock blocks are filled with 20% of cement stone chips. And 20% of cement stone chips are adopted as a well bottom foundation 50cm above the riprap layer.
6. Installing a wellbore
(1) The height of the first section of the prefabricated inspection well section is 1.7m, the height of the middle standard section is 1m, and the height of the inspection well can be adjusted and controlled by adjusting the shaft.
(2) 1:2 waterproof cement mortar grouting or polyurethane blended cement mortar is adopted at the interfaces between the shafts and between the prefabricated cover plate and the shaft, and a water-stopping rubber ring with the diameter of 15mm is placed.
(3) During installation, the vertical shaft is noticed, and the axis of the reserved opening of the shaft is noticed to be consistent with the axis of the pipeline.
7. The well periphery is filled as shown in fig. 5 and 6.
The gap between the inspection well and the steel casing is filled with 20% of cement stone chips, and fillers on two sides are tamped during backfilling and are symmetrically filled along the pipe as much as possible so as to ensure that the well body is vertical and stable.
8. And (5) pulling out the steel casing as shown in figure 7.
And (3) filling a gap between the inspection well and the steel casing with 20% of cement stone chips, and then pulling out the steel casing. If a gap is generated around the well body due to the pulling-out of the steel casing, 20% of cement stone chips are adopted for secondary filling.
9. The road surface recovers as shown in fig. 8.
And after the construction of the sewage pipe network and the interior of the well body is completed, the pavement is restored according to the current situation of the well.
The construction method for the large-diameter inspection well pile drilling method provided by the embodiment of the application has the following advantages:
simple and efficient: the traditional construction method needs to carry out multiple rounds of reinforcement bar binding, template installation, concrete pouring and earth excavation, and the construction of a single large-diameter inspection well needs at least 20-30 days. The construction method provided by the application only needs drilling for forming holes and prefabricating the inspection well for installation, and the construction time of a single large-diameter inspection well is shortened to 1 day.
The space required by the operation is small: in the traditional construction method, because the templates need to be installed, the construction space of the formwork is formed in the range of 2m-3m around the well, and the occupied area is large. The application provides a method construction only need satisfy bore a stake machinery and rise can, especially bore stake machine after the improvement and adopt crawler-type chassis, further reduced the required space of operation, more adapt to narrow road environment.
The interference to traffic is small: compared with the traditional construction method, the construction method provided by the application has the advantages that the construction time is greatly shortened, the space required by construction is reduced, the traffic blockage caused by construction is quickly recovered, and the interference of construction on traffic is reduced to the minimum.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (10)
1. A pile drilling method construction method for a large-diameter inspection well is characterized by comprising the following steps:
drilling and excavating by using a drilling machine to form a basic well with a target aperture and a target depth;
after the drilling machine is withdrawn, installing a steel casing into the foundation well;
pumping mud within the base well out of the base well;
the conical bottom of the foundation well is filled with rock blocks and cement stone chips are adopted at the upper part of the formed stone throwing layer to form a bottom foundation;
installing a pre-cast wellbore to the interior of the steel casing;
filling a gap between the steel casing and the prefabricated shaft by adopting cement stone chips;
and after the filling is finished, the steel casing is pulled out of the foundation well, so that the pavement is recovered according to the current situation of the well after the construction of the sewage pipe network and the interior of the prefabricated shaft is finished.
2. The method as claimed in claim 1, wherein the basic well is drilled to a target diameter and a target depth using a crawler-type drilling machine.
3. The pile-drilling construction method for the large-diameter inspection well according to claim 1, wherein after slurry in the foundation well is pumped out of the foundation well, a gap between the steel casing and the wall of the foundation well is filled with cement and stone chips.
4. The method as claimed in claim 1, wherein the conical bottom of the foundation well is filled with rock blocks and the gaps between the rock blocks are filled with cement chips.
5. The method of constructing a large-diameter manhole by drilling a pile according to claim 1, wherein a prefabricated shaft and a manhole cover are installed to the inside of the steel casing.
6. The pile drilling construction method of the large-diameter inspection well according to claim 5, wherein the prefabricated shaft comprises a plurality of sections, and water-stop rubber rings are arranged between two adjacent sections of the prefabricated shaft and between the well cover and the adjacent shaft and are filled with mortar.
7. The construction method of the large-diameter inspection well by the pile drilling method according to claim 6, wherein the mortar is 1:2 waterproof cement grouting mortar or polyurethane blended with cement mortar.
8. The pile drilling method construction method for the large-diameter inspection well according to claim 1, wherein a gap between the steel casing and the prefabricated well shaft is filled with cement and stone chips in a manner of being symmetrically filled along the prefabricated well shaft.
9. The pile drilling construction method for the large-diameter inspection well according to claim 1, wherein after the filling, the steel casing is pulled out of the foundation well, and then a gap between the prefabricated well shaft and the well wall of the foundation well is filled with cement and stone chips.
10. The method for constructing a large-diameter inspection well by drilling and piling according to any one of claims 1 to 9, wherein the cement stone chips are 20% cement stone chips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210206387.0A CN114592581A (en) | 2022-03-03 | 2022-03-03 | Large-diameter inspection well pile drilling method construction method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210206387.0A CN114592581A (en) | 2022-03-03 | 2022-03-03 | Large-diameter inspection well pile drilling method construction method |
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| CN114592581A true CN114592581A (en) | 2022-06-07 |
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| CN202210206387.0A Pending CN114592581A (en) | 2022-03-03 | 2022-03-03 | Large-diameter inspection well pile drilling method construction method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115354681A (en) * | 2022-09-19 | 2022-11-18 | 中建三局绿色产业投资有限公司 | Open caisson construction method suitable for house dense area along river basin |
-
2022
- 2022-03-03 CN CN202210206387.0A patent/CN114592581A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115354681A (en) * | 2022-09-19 | 2022-11-18 | 中建三局绿色产业投资有限公司 | Open caisson construction method suitable for house dense area along river basin |
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