CN113279470A - Open-cut improved prefabricated horse riding well construction method - Google Patents

Open-cut improved prefabricated horse riding well construction method Download PDF

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Publication number
CN113279470A
CN113279470A CN202110732905.8A CN202110732905A CN113279470A CN 113279470 A CN113279470 A CN 113279470A CN 202110732905 A CN202110732905 A CN 202110732905A CN 113279470 A CN113279470 A CN 113279470A
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China
Prior art keywords
well
reinforced concrete
prefabricated
prefabricated reinforced
construction
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CN202110732905.8A
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Chinese (zh)
Inventor
黎潮嘉
邱俊新
魏浩鹏
周福城
陈冬枫
韦芷琦
姚海波
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Guangdong Fourth Construction Engineering Co ltd
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Guangdong Fourth Construction Engineering Co ltd
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Priority to CN202110732905.8A priority Critical patent/CN113279470A/en
Publication of CN113279470A publication Critical patent/CN113279470A/en
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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
    • E03F5/027—The bottom made of prefabricated segments
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00—Excavations; Bordering of excavations; Making embankments
    • E02D17/06—Foundation trenches ditches or narrow shafts
    • E02D17/08—Bordering or stiffening the sides of ditches trenches or narrow shafts for foundations
    • 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
    • E02D29/125—Manhole shafts; Other inspection or access chambers; Accessories therefor characterised by the lining of the shaft
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22—Piles
    • E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
    • E02D5/46—Concrete or concrete-like piles cast in position ; Apparatus for making same making in situ by forcing bonding agents into gravel fillings or the soil

Abstract

The invention provides an open cut type improved prefabricated horse riding well construction method, which comprises the following steps: 1. breaking the road surface; 2. driving a high-pressure rotary jet grouting pile to form a retaining pile; 3. open excavation of a foundation pit and construction of a concrete cushion layer, and excavation of a working well and a receiving well on two sides of the foundation pit; 4. lowering the prefabricated reinforced concrete well base; 5. constructing an underground pipeline in a pipe jacking mode; 6. cutting off an underground pipeline in the prefabricated reinforced concrete well base; 7. a prefabricated reinforced concrete well chamber cylinder, a prefabricated reinforced concrete cover plate, 2 prefabricated reinforced concrete shafts, a prefabricated reinforced concrete well ring and a well cover matched with the prefabricated reinforced concrete well ring are sequentially arranged above the prefabricated reinforced concrete well chamber seat from bottom to top, and the prefabricated horse riding well assembly is completed; 8. and backfilling the gap in the foundation pit and repairing the pavement. The open cut method is used for replacing the existing open caisson method and the existing wall protection method, so that the construction progress can be effectively accelerated; and the prefabricated horse riding well replaces the existing cast-in-place horse riding well, so that the material cost can be greatly reduced, and the construction efficiency can be improved.

Description

Open-cut improved prefabricated horse riding well construction method
Technical Field
The invention relates to the field of municipal underground pipeline engineering, in particular to an open cut type improved prefabricated horse riding well construction method.
Background
In urban sewage pipe network transformation engineering, the problem that a newly-built sewage pipe is connected into an existing sewage pipe network often exists, urban main sewage pipes are usually buried underground, and new and old sewage pipes are usually communicated and connected through a newly-built 'horse riding well', so that the problems are better solved.
At present, the construction process of the horsewell mainly comprises two types: the construction process of cast-in-place saddle-riding well by open caisson method includes that a construction well is divided into multiple sections to be poured and sunk in sequence, the maintenance time of each section of the construction well is required to be not less than 14d (the construction well can sink when reaching 95% of design strength), and the construction progress is seriously influenced by technical intermittence. Meanwhile, the open caisson method has high construction precision requirement, and the pipeline can be damaged when the open caisson method is sunk to the elevation of the pipe top. The other construction process is a retaining wall method cast-in-place horsewell construction process, the retaining wall method cast-in-place horsewell needs to be excavated to a certain depth firstly, then a first section of reinforced concrete retaining wall is constructed, and after concrete is poured for 24 hours, the technical intermittence of the construction process is also influenced. According to the relevant requirements of the specification, coarse sand in the gaps between the construction well or the retaining wall and the cast-in-place horseback well in the two processes needs to be backfilled, and the cost expenditure of the construction well or the retaining wall and the material consumption of auxiliary technical measures such as the construction well and the retaining wall are obviously higher. In addition, the bottom well chamber with the built-in horse riding well has relatively limited sewage containing space, is easy to cause blockage and is inconvenient for operators to go into the well for maintenance. In the process of pipe jacking construction, a new pipeline is difficult to access, a hole needs to be formed in the well wall, and the machine head is difficult to take out. Therefore, improvements are needed.
Disclosure of Invention
The invention aims to provide an open cut type improved prefabricated horse riding well construction method, which replaces the existing open cut method and the existing open caisson method and the existing retaining wall method, and can effectively accelerate the construction progress; and the prefabricated horse riding well replaces the existing cast-in-place horse riding well, so that the material cost can be greatly reduced, and the construction efficiency can be improved.
The purpose of the invention can be realized by the following technical scheme:
an open cut type improved prefabricated horse riding well construction method comprises the following steps:
step 1, measuring and positioning a construction site of a horseback riding well on a construction road surface, and breaking the road surface and a hard base layer of the horseback riding well by adopting a drilling and blasting machine for drilling the construction site and the vicinity of the construction site;
step 2, driving a plurality of continuously arranged high-pressure rotary jet grouting piles around the construction site of the horsehole to form a retaining pile;
step 3, excavating a foundation pit in the retaining pile to a designed elevation, leveling the bottom of the foundation pit and constructing a concrete cushion on the bottom of the foundation pit; excavating a working well and a receiving well for pipe jacking construction near two sides of the foundation pit;
step 4, after the concrete cushion layer is finally set, putting the prefabricated reinforced concrete well base down into the foundation pit;
the prefabricated reinforced concrete well chamber seat is provided with a circular base part and a well chamber part positioned in the middle part above the base part, the well chamber part is of a cylindrical structure with a well chamber opening at the top, 2 symmetrically arranged pipeline connecting holes are reserved on the side wall of the well chamber part, and a brick wall is built in the pipeline connecting holes in advance and is temporarily closed before the prefabricated reinforced concrete well chamber seat is placed in a foundation pit; the 2 pipeline connecting holes are respectively arranged corresponding to the directions of the working well and the receiving well;
step 5, constructing the underground pipeline of the horse riding well in a pipe jacking mode, jacking the underground pipeline from the working well to the receiving well, wherein a drill bit for pipe jacking construction penetrates through the high-pressure jet grouting pile of the retaining pile and the brick wall in the pipeline connecting hole of the prefabricated reinforced concrete well chamber seat, so that the underground pipeline sequentially penetrates through one side, close to the working well, of the retaining pile, 1 pipeline connecting hole of the prefabricated reinforced concrete well chamber seat, the other 1 pipeline connecting hole of the prefabricated reinforced concrete well chamber seat and one side, close to the receiving well, of the retaining pile; after the pipe-jacking construction of the underground pipeline is completed, the underground pipeline is respectively blocked with a pipeline connecting hole of the prefabricated reinforced concrete well base and a gap between the underground pipeline and the high-pressure jet grouting pile of the retaining pile by adopting waterproof mortar;
6, cutting off an underground pipeline in the prefabricated reinforced concrete well base and cleaning construction wastes in the prefabricated reinforced concrete well base and the bottom of the foundation pit;
step 7, sequentially installing a prefabricated reinforced concrete well chamber cylinder, a prefabricated reinforced concrete cover plate, 2 prefabricated reinforced concrete shafts, a prefabricated reinforced concrete well ring and a well cover matched with the prefabricated reinforced concrete well ring from bottom to top above the prefabricated reinforced concrete well chamber seat in a waterproof mortar seat slurry construction mode, and assembling and completing the prefabricated horse riding well in a foundation pit;
the prefabricated reinforced concrete well chamber barrel is of a cylindrical structure with barrel openings at two ends, and the barrel opening at the bottom end of the prefabricated reinforced concrete well chamber barrel is aligned with the well chamber opening of the prefabricated reinforced concrete well chamber seat and is connected with the well chamber opening through waterproof mortar; the prefabricated reinforced concrete cover plate is a round cover plate of a prefabricated reinforced concrete structure, covers a cylinder opening at the top end of the prefabricated reinforced concrete well cylinder and is connected with the prefabricated reinforced concrete well cylinder through waterproof mortar, and a well inlet is formed in the prefabricated reinforced concrete cover plate; the prefabricated reinforced concrete well chamber seat, the prefabricated reinforced concrete well chamber barrel and the prefabricated reinforced concrete cover plate are assembled into a well chamber working part of the prefabricated horse riding well;
the prefabricated reinforced concrete shaft is a cylindrical structure with ports at two ends, the 2 prefabricated reinforced concrete shafts are aligned up and down and connected through waterproof mortar, and the port at the bottom end of the prefabricated reinforced concrete shaft below is aligned with the well chamber inlet of the prefabricated reinforced concrete cover plate and connected through the waterproof mortar to form a well chamber channel part of the prefabricated horse riding well;
the prefabricated reinforced concrete well ring and the well cover are arranged on the top end port of the prefabricated reinforced concrete shaft above the prefabricated reinforced concrete well ring to seal or open the well chamber channel part of the prefabricated horse riding well;
and 8, backfilling gaps on the outer side of the prefabricated horse riding well in the foundation pit, and repairing the pavement as it is.
According to the optimized scheme, the retaining pile is formed by a plurality of high-pressure jet grouting piles which are circumferentially arranged.
According to the optimization scheme, in the step 2, the diameter of the pile body of each high-pressure jet grouting pile is 400-600 mm, and the pile distance between every two adjacent high-pressure jet grouting piles is 300-400 mm.
And 3, in the step 3, when the foundation pit is excavated, a soil layer of 200-300 mm is reserved from mechanical excavation to the bottom of the foundation pit, and then the soil layer is excavated to the designed elevation manually.
In the step 3, the thickness of the concrete cushion is 80-120 mm.
The invention has the following prominent substantive features and remarkable progress:
1. the open cut method replaces the open caisson method and the wall protection method, so that the intermittent time generated by the open cut method and the wall protection method due to prior technical measures is effectively saved, and the construction progress is greatly accelerated; meanwhile, the underground pipeline is connected with the prefabricated reinforced concrete well base in a pipe jacking construction mode, the underground pipeline cannot be damaged, and the underground pipeline construction method has the characteristics of high construction reliability and high precision.
2. The prefabricated horse riding well adopted in the invention avoids the complicated working procedures of a cast-in-place method, and has the characteristics of simple structure, easy manufacture and convenient butt joint of all prefabricated parts; in addition, the prefabricated horseback riding well has a large indoor space, so that enough space is provided for the workers to go into the well for overhauling, and the operation and maintenance pressure is reduced.
Drawings
FIG. 1 is a construction effect diagram of step 2 and step 3 in the present invention.
FIG. 2 is a construction effect diagram of step 4 in the present invention.
FIG. 3 is a construction effect diagram of step 5 in the present invention.
FIG. 4 is a construction effect diagram of step 6 in the present invention.
Fig. 5 and 6 are construction effect diagrams of step 7 in the present invention.
FIG. 7 is a view showing the effect of step 8 in the present invention.
Detailed Description
The invention will be further explained with reference to the drawings.
Examples
Referring to fig. 1 to 7, a construction method of an open cut type improved prefabricated horse riding well includes the following steps:
step 1, measuring and positioning a construction site of a horseshoe riding well on a construction road surface 10, and breaking the road surface and a hard base layer thereof by adopting a drilling and blasting machine for drilling the construction site of the horseshoe riding well and the vicinity of the construction site;
step 2, as shown in figure 1, a plurality of high-pressure jet grouting piles 1 which are continuously arranged in a circumferential shape are driven around the construction position of the horsehole to form a circular retaining pile; in the embodiment, the diameter of the pile body of the high-pressure jet grouting pile 1 is 500mm, and the pile spacing between every two adjacent high-pressure jet grouting piles 1 is 350 mm;
step 3, as shown in fig. 1, excavating a foundation pit in the retaining pile, wherein a soil layer of 200-300 mm is reserved at the bottom of the foundation pit 20 by mechanical excavation, and then the foundation pit is excavated to the designed elevation by manual excavation; then leveling the bottom of the foundation pit 20 and constructing a concrete cushion 2 with the thickness of 100mm on the bottom of the foundation pit 20; a working well 21 and a receiving well 22 for pipe jacking construction are excavated near two sides of the foundation pit 20;
step 4, as shown in fig. 2, after the concrete cushion 2 is finally set, putting the precast reinforced concrete well base 3 into the foundation pit 20;
the precast reinforced concrete well chamber seat 3 is provided with a circular base part 31 and a well chamber part 32 which is positioned in the middle part above the base part 31, the well chamber part 32 is of a cylindrical structure with a well chamber opening at the top, 2 symmetrically arranged pipeline connecting holes are reserved on the side wall of the well chamber part 32, and a brick wall 30 is pre-built in the pipeline connecting holes and temporarily closed before the precast reinforced concrete well chamber seat is lowered into the foundation pit 20; the 2 pipeline connecting holes are respectively arranged corresponding to the directions of the working well 21 and the receiving well 22;
step 5, as shown in fig. 3, constructing an underground pipeline 33 of the horse riding well in a pipe jacking mode, jacking the underground pipeline 33 from the working well 21 to the receiving well 22, wherein a drill 23 for pipe jacking construction penetrates through the high-pressure jet grouting pile 1 of the retaining pile and the brick wall 30 in the pipeline connecting hole of the precast reinforced concrete well chamber seat 3, so that the underground pipeline 33 sequentially penetrates through one side of the retaining pile close to the working well 21, 1 pipeline connecting hole of the precast reinforced concrete well chamber seat 3, the other 1 pipeline connecting hole of the precast reinforced concrete well chamber seat 3 and one side of the retaining pile close to the receiving well 22; after the pipe-jacking construction of the underground pipeline 33 is finished, the gaps between the underground pipeline 33 and the pipeline connecting holes of the prefabricated reinforced concrete well base 3 and the high-pressure jet grouting pile 1 of the retaining pile are respectively blocked by waterproof mortar;
6, as shown in fig. 4, cutting off the underground pipeline 33 in the precast reinforced concrete well base 3, and cleaning the construction waste in the precast reinforced concrete well base 3 and the bottom of the foundation pit 20;
step 7, as shown in fig. 5 and 6, sequentially installing a prefabricated reinforced concrete well chamber barrel 4, a prefabricated reinforced concrete cover plate 5, 2 prefabricated reinforced concrete shafts 6, a prefabricated reinforced concrete well ring 7 and a well cover 8 matched with the prefabricated reinforced concrete well ring 7 above the prefabricated reinforced concrete well chamber seat 3 from bottom to top in a waterproof mortar seat slurry construction mode, and assembling the prefabricated horse riding well in a foundation pit 20;
the prefabricated reinforced concrete well chamber barrel 4 is of a cylindrical structure with barrel mouths at two ends respectively, and the barrel mouth at the bottom end of the prefabricated reinforced concrete well chamber barrel is aligned with the well chamber opening of the prefabricated reinforced concrete well chamber seat 3 and is connected with the well chamber opening through waterproof mortar; the prefabricated reinforced concrete cover plate 5 is a round cover plate of a prefabricated reinforced concrete structure, covers a cylinder opening at the top end of the prefabricated reinforced concrete well cylinder 4 and is connected through waterproof mortar, and a well chamber inlet 50 is formed in the prefabricated reinforced concrete cover plate 5; the prefabricated reinforced concrete well base 3, the prefabricated reinforced concrete well barrel 4 and the prefabricated reinforced concrete cover plate 5 are assembled into a well working part of the prefabricated horse riding well;
the prefabricated reinforced concrete shaft 6 is a cylindrical structure with ports at two ends respectively, the 2 prefabricated reinforced concrete shafts 6 are aligned up and down and connected through waterproof mortar, and the port at the bottom end of the prefabricated reinforced concrete shaft 6 at the lower part is aligned with the well chamber inlet 50 of the prefabricated reinforced concrete cover plate 5 and connected and assembled through the waterproof mortar to form a well chamber channel part of the prefabricated horse riding well;
the prefabricated reinforced concrete well ring 7 and the well cover 8 are arranged on the top end port of the prefabricated reinforced concrete shaft 6 above, so that a well chamber channel part of the prefabricated horse riding well is closed or opened;
and 8, as shown in fig. 7, backfilling the gap outside the prefabricated horse riding well in the foundation pit 20 by using medium coarse sand, and repairing the pavement as it is.
In this embodiment, the total height of the precast reinforced concrete well base 3 is 1.8m, wherein the outer diameter of the well portion 32 is 2700mm, the wall thickness is 250mm, and the diameter of the base portion 31 is 3000mm, and the thickness is 300 mm. The prefabricated reinforced concrete well chamber barrel 4 has the outer diameter of 2700mm, the wall thickness of 250mm and the height of 1.5 m. The diameter of the prefabricated reinforced concrete cover plate 5 is 2700mm, and the plate thickness is 150 mm. The prefabricated reinforced concrete shaft has the outer diameter of 1000mm, the wall thickness of 150mm and the height of 500 mm. After the construction is completed according to the method of the invention, a stepping and anti-falling net is arranged in the horse riding well. When the manhole cover is used, an operator can open a manhole passage part formed by the prefabricated reinforced concrete shaft 6 of the manhole cover 8, and the manhole passage part penetrates through the manhole entrance 50 of the prefabricated reinforced concrete cover plate 5 to enter the manhole working part for maintenance.
The retaining pile formed by the high-pressure jet grouting pile 1 is used as a support of the foundation pit 20, and then the foundation pit 20 is directly constructed by an open cut method; the riding well is divided into a plurality of reinforced concrete prefabricated parts which can be quickly arranged in the foundation pit 20; the whole construction process basically does not need concrete maintenance, can effectively accelerate the construction progress, has the characteristics of high construction efficiency and short construction period, and further effectively improves the construction efficiency of municipal underground pipeline engineering.

Claims (5)

1. An open cut type improved prefabricated horse riding well construction method is characterized by comprising the following steps:
step 1, measuring and positioning a construction site of a horseshoe well on a construction pavement (10), and breaking the pavement and a hard base layer of the horseshoe well by adopting a drilling gun machine for drilling the construction site and the vicinity of the construction site;
step 2, driving a plurality of continuously arranged high-pressure rotary jet grouting piles (1) around the construction site of the horsehole to form a retaining pile;
step 3, excavating a foundation pit in the retaining pile to a designed elevation, leveling the bottom of the foundation pit (20) and constructing a concrete cushion (2) on the bottom of the foundation pit (20); a working well (21) and a receiving well (22) for pipe jacking construction are excavated near two sides of the foundation pit (20);
step 4, after the concrete cushion (2) is finally set, putting the prefabricated reinforced concrete well room seat (3) into the foundation pit (20);
the precast reinforced concrete well chamber seat (3) is provided with a circular base part (31) and a well chamber part (32) which is positioned in the middle part above the base part (31), the well chamber part (32) is of a cylindrical structure with a well chamber opening at the top, 2 symmetrically arranged pipeline connecting holes are reserved on the side wall of the well chamber part (32), and a brick wall (30) is built in the pipeline connecting holes in advance and temporarily closed before the precast reinforced concrete well chamber seat is placed in a foundation pit (20); the 2 pipeline connecting holes are respectively arranged corresponding to the directions of the working well (21) and the receiving well (22);
step 5, constructing an underground pipeline (33) of the horseback riding well in a pipe jacking mode, jacking the underground pipeline (33) from the working well (21) to the receiving well (22), wherein a drill (23) for pipe jacking construction penetrates through a high-pressure jet grouting pile (1) of the retaining pile and a brick wall (30) in a pipeline connecting hole of the precast reinforced concrete well chamber seat (3), and enabling the underground pipeline (33) to sequentially penetrate through one side, close to the working well (21), of the retaining pile, 1 pipeline connecting hole of the precast reinforced concrete well chamber seat (3), the other 1 pipeline connecting hole of the precast reinforced concrete well chamber seat (3) and one side, close to the receiving well (22), of the retaining pile; after the construction of the top pipe of the underground pipeline (33) is finished, the gap between the underground pipeline (33) and the pipeline connecting hole of the precast reinforced concrete well base (3) and the gap between the underground pipeline and the high-pressure jet grouting pile (1) of the retaining pile are respectively blocked by waterproof mortar;
6, cutting off an underground pipeline (33) in the precast reinforced concrete well base (3) and cleaning construction wastes in the precast reinforced concrete well base (3) and the bottom of the foundation pit (20);
step 7, sequentially installing a prefabricated reinforced concrete well chamber cylinder (4), a prefabricated reinforced concrete cover plate (5), 2 prefabricated reinforced concrete shafts (6), a prefabricated reinforced concrete well ring (7) and a well cover (8) matched with the prefabricated reinforced concrete well ring (7) from bottom to top above the prefabricated reinforced concrete well chamber seat (3) in a waterproof mortar seat slurry construction mode, and assembling in a foundation pit (20) to complete the prefabricated horse riding well;
the prefabricated reinforced concrete well chamber barrel (4) is of a cylindrical structure with barrel mouths at two ends respectively, and the barrel mouth at the bottom end of the prefabricated reinforced concrete well chamber barrel is aligned with the well chamber opening of the prefabricated reinforced concrete well chamber seat (3) and is connected with the well chamber opening through waterproof mortar; the prefabricated reinforced concrete cover plate (5) is a round cover plate of a prefabricated reinforced concrete structure, covers a cylinder opening at the top end of the prefabricated reinforced concrete well chamber cylinder (4) and is connected through waterproof mortar, and a well chamber inlet (50) is formed in the prefabricated reinforced concrete cover plate (5); the prefabricated reinforced concrete well room seat (3), the prefabricated reinforced concrete well room barrel (4) and the prefabricated reinforced concrete cover plate (5) are assembled into a well room working part of the prefabricated horse riding well;
the prefabricated reinforced concrete shaft (6) is of a cylindrical structure, two ends of the cylindrical structure are respectively provided with ports, 2 prefabricated reinforced concrete shafts (6) are aligned up and down and are connected through waterproof mortar, and the port at the bottom end of the prefabricated reinforced concrete shaft (6) below is aligned with a well chamber inlet (50) of the prefabricated reinforced concrete cover plate (5) and is connected and assembled through the waterproof mortar to form a well chamber channel part of the prefabricated horse riding well;
the prefabricated reinforced concrete well ring (7) and the well cover (8) are arranged on the top end port of the prefabricated reinforced concrete shaft (6) above, so that a well chamber channel part of the prefabricated horse riding well is closed or opened;
and 8, backfilling gaps outside the prefabricated horse riding well in the foundation pit (20), and repairing the pavement as it is.
2. The open cut improved prefabricated horse riding well construction method according to claim 1, characterized in that: the retaining pile is composed of a plurality of high-pressure jet grouting piles (1) which are circumferentially arranged.
3. The open cut improved prefabricated horse riding well construction method according to claim 1, characterized in that: in the step 2, the diameter of the pile body of the high-pressure jet grouting pile (1) is 400-600 mm, and the pile spacing between every two adjacent high-pressure jet grouting piles (1) is 300-400 mm.
4. The open cut improved prefabricated horse riding well construction method according to claim 1, characterized in that: and 3, when the foundation pit (20) is excavated, firstly, mechanically excavating to the bottom of the foundation pit (20) to reserve a soil layer of 200-300 mm, and then excavating to the designed elevation manually.
5. The open cut improved prefabricated horse riding well construction method according to claim 1, characterized in that: in the step 3, the thickness of the concrete cushion (2) is 80-120 mm.
CN202110732905.8A 2021-06-30 2021-06-30 Open-cut improved prefabricated horse riding well construction method Pending CN113279470A (en)

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Application Number Priority Date Filing Date Title
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201883453U (en) * 2010-12-06 2011-06-29 郑州市市政工程总公司 Combined pipe jacking working well
CN103821219A (en) * 2014-03-03 2014-05-28 永升建设集团有限公司 Top pipe construction modification inspection well construction method
CN203729424U (en) * 2014-03-03 2014-07-23 永升建设集团有限公司 Modified horseback-riding inspection well for top pipe construction
CN107217725A (en) * 2017-07-06 2017-09-29 南通航运职业技术学院 A kind of hand excavation rides well and its construction method
CN108978717A (en) * 2017-06-05 2018-12-11 陕西晟泰源水泥制品有限公司 Precast assembling concrete manhole and prepackage method
CN110219359A (en) * 2019-07-16 2019-09-10 湖南博世科环保科技有限公司 A kind of Submersed type inspection well and its construction method

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201883453U (en) * 2010-12-06 2011-06-29 郑州市市政工程总公司 Combined pipe jacking working well
CN103821219A (en) * 2014-03-03 2014-05-28 永升建设集团有限公司 Top pipe construction modification inspection well construction method
CN203729424U (en) * 2014-03-03 2014-07-23 永升建设集团有限公司 Modified horseback-riding inspection well for top pipe construction
CN108978717A (en) * 2017-06-05 2018-12-11 陕西晟泰源水泥制品有限公司 Precast assembling concrete manhole and prepackage method
CN107217725A (en) * 2017-07-06 2017-09-29 南通航运职业技术学院 A kind of hand excavation rides well and its construction method
CN110219359A (en) * 2019-07-16 2019-09-10 湖南博世科环保科技有限公司 A kind of Submersed type inspection well and its construction method

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Application publication date: 20210820