CN112554203A - Miniature open caisson prefabricated molding bed construction method for silt flow sand area with abundant underground water - Google Patents
Miniature open caisson prefabricated molding bed construction method for silt flow sand area with abundant underground water Download PDFInfo
- Publication number
- CN112554203A CN112554203A CN202011409238.1A CN202011409238A CN112554203A CN 112554203 A CN112554203 A CN 112554203A CN 202011409238 A CN202011409238 A CN 202011409238A CN 112554203 A CN112554203 A CN 112554203A
- Authority
- CN
- China
- Prior art keywords
- open caisson
- forming die
- reinforced concrete
- construction
- type reinforced
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D23/00—Caissons; Construction or placing of caissons
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D23/00—Caissons; Construction or placing of caissons
- E02D23/08—Lowering or sinking caissons
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Foundations (AREA)
Abstract
The construction method integrates the functions of foundation pit supporting, foundation pit brick moulding bed and inverted filter layer drainage well into a whole, has simple and safe construction process and low manufacturing cost, can save larger cost of dewatering measures and shorten the construction period. Compared with the traditional process of draining underground water through precipitation, excavating a foundation pit and building a brick moulding bed, the method obviously reduces the construction process steps, accelerates the construction progress, improves the enclosure and moulding bed system of the structural concrete quality, and solves the problems of more process steps, slow construction progress, poor construction quality and potential safety hazard of the traditional local pit part bottom plate pit construction method.
Description
Technical Field
The invention belongs to the technical field of building construction, and particularly relates to a miniature open caisson prefabricated molding bed construction method for a silt flow sand area with abundant underground water. The method mainly comprises maintenance of a local sinking pit with a pile foundation bottom plate and a brick moulding bed system in the construction of industrial civil buildings and municipal public engineering structures, and particularly relates to a construction method of a temporary enclosure of the local pit and a brick moulding bed of a concrete structure in the pit by using a prefabricated reinforced concrete miniature moulding bed when the construction of the local pit in the foundation bottom is excavated in a large area with abundant underground water.
Background
At present, most of the existing local deep foundation pit construction technologies adopt a construction technology of supporting in a foundation pit, dewatering in the pit and then building a brick die, but the application research of the miniature open caisson type construction method is less, the traditional construction method has long construction period, high cost and more potential safety hazards, and the final construction quality effect is poor. In order to solve the problems, the invention patent with the patent number of CN202010687552.X discloses a prefabricated underground structure based on an open caisson method and a construction method, the prefabricated underground structure comprises a blade angle, a side wall, a middle column, a bracket, a circumferential reinforcing beam, a prefabricated plate, a cast-in-place plate and a longitudinal beam, the prefabricated part is a standard component which is prefabricated in an industrial mode and is installed in a foundation pit after the open caisson structure is formed by ground assembly, the cast-in-place part adopts on-site pouring, the end head of the prefabricated plate is connected with the circumferential reinforcing beam or the longitudinal beam, a connecting joint is solidified in the cast-in-place mode, the foundation pit excavation is realized through the open caisson structure sinking, the side wall is supported through the circumferential reinforcing beam and a temporary horizontal supporting system in the open caisson sinking stage, no enclosure structure is needed, and the problems of large. However, the prefabricated underground structure adopted in the technical scheme of the patent is complex in structure, one part of the prefabricated tire membrane is prefabricated before construction, the other part of the prefabricated tire membrane needs to be assembled in the construction process, and the corresponding construction method is complex, long in construction time and large in workload. There is therefore a need for improvements.
Disclosure of Invention
The technical problems solved by the invention are as follows: the invention provides a construction method of a miniature open caisson prefabricated moulding bed for a silt flow sand area with abundant underground water, which reduces the construction process steps, accelerates the construction progress, improves the enclosure and moulding bed system of the quality of structural concrete, and solves the problems of multiple process steps, slow construction progress, poor construction quality and potential safety hazard of the traditional local pit part bottom plate pit construction method.
The technical scheme adopted by the invention is as follows: the prefabricated forming die construction method for miniature open caisson used in silt flow sand area with abundant underground water comprises the following steps:
step 1): excavating earth to the bottom of a large-surface foundation pit, namely the top surface elevation of the precast tubular pile;
step 2): pre-prefabricating a micro open caisson type reinforced concrete forming die according to the size and the depth of a local deep pit plane;
step 3): placing the miniature open caisson type reinforced concrete forming die into an excavated foundation pit, inserting a prefabricated forming die cutting foot of the miniature open caisson type reinforced concrete forming die into a local deep pit excavation position of the surface of the foundation pit, starting to manually excavate mucky soil to enable the miniature open caisson type reinforced concrete forming die to sink to a target elevation, correcting the miniature open caisson type reinforced concrete forming die, backfilling a sandstone anti-filtration layer and pumping water;
step 4): after the step 3) is finished, mounting a bottom-sealing prefabricated plate, enabling the precast tubular pile to penetrate out of the middle of the bottom-sealing prefabricated plate, connecting the bottom-sealing prefabricated plate with a precast moulding bed bracket at the lower part of the inner surface of the miniature open caisson type reinforced concrete moulding bed, and plugging by adopting quick-hardening mortar;
step 5): paving and sticking the added waterproof coiled material on the bottom-sealing prefabricated plate;
step 6): carrying out concrete pouring on the waterproof coiled material protective layer;
step 7): and finally, performing basement waterproof layer construction and foundation raft construction on the exposed inner surfaces of the waterproof coiled material protective layer concrete and the miniature open caisson type reinforced concrete forming die.
In order to further limit the technical scheme, the miniature open caisson type reinforced concrete forming die is of a bottomless cylinder structure, the lower end of the miniature open caisson type reinforced concrete forming die is provided with a prefabricated forming die cutting edge, and the lower part of the inner surface of the miniature open caisson type reinforced concrete forming die is provided with a prefabricated forming die bracket.
Compared with the prior art, the invention has the advantages that:
the construction method integrates the foundation pit supporting function, the foundation pit brick moulding bed function and the inverted filter layer drainage well function, is simple and safe in construction process, high in speed and low in manufacturing cost, can save large dewatering measure cost, and shortens the construction period. Compared with the traditional process of draining underground water through precipitation, excavating a foundation pit and building a brick moulding bed, the method obviously reduces the construction process steps, accelerates the construction progress, improves the enclosure and moulding bed system of the structural concrete quality, and solves the problems of more process steps, slow construction progress, poor construction quality and potential safety hazard of the traditional local pit part bottom plate pit construction method.
Drawings
FIG. 1 is a schematic view of the present invention illustrating earth excavation to the bottom of a large-area foundation pit and insertion of a prefabricated form into the excavation site in the foundation pit;
FIG. 2 is a schematic diagram of a backfilled sandstone anti-filtration layer after the artificial excavation moulding bed is settled and corrected;
FIG. 3 is a schematic view of the installation of the back cover prefabricated panels in the present invention;
FIG. 4 is a schematic view of the waterproof roll material of the present invention;
FIG. 5 is a schematic view of the concrete casting of the waterproof roll protective layer according to the present invention;
fig. 6 is a schematic diagram of basement waterproof layer and foundation raft construction in the invention.
In the figure: 1. the prefabricated pipe pile comprises a prefabricated pipe pile, 2 parts of mucky earthwork, 3 parts of prefabricated moulding bed cutting foot, 4 parts of prefabricated moulding bed bracket, 5 parts of miniature open caisson type reinforced concrete moulding bed, 6 parts of gravel reverse filtering layer, 7 parts of bottom-sealing prefabricated plate, 8 parts of waterproof coiled material, 9 parts of waterproof coiled material protective layer concrete, 10 parts of basement waterproof layer.
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, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, in this document, 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. The use of the phrase "comprising one of the elements" does not exclude the presence of other like elements in the process, method, article, or apparatus that comprises the element.
Referring to fig. 1-6, embodiments of the present invention are described in detail.
The prefabricated forming die construction method for miniature open caisson used in silt flow sand area with abundant underground water comprises the following steps:
step 1): excavating earth to the bottom of a large-surface foundation pit, namely the top surface elevation of the precast tubular pile 1;
step 2): the miniature open caisson type reinforced concrete forming die 5 is prefabricated in advance according to the size and the depth of the local deep pit plane. Specifically, the miniature open caisson type reinforced concrete forming die 5 is of a bottomless cylinder structure, the lower end of the miniature open caisson type reinforced concrete forming die 5 is provided with a prefabricated forming die cutting edge 3, and the lower part of the inner surface of the miniature open caisson type reinforced concrete forming die 5 is provided with a prefabricated forming die bracket 4.
Step 3): placing the micro open caisson type reinforced concrete forming die 5 into an excavated foundation pit, inserting a prefabricated forming die cutting foot 3 of the micro open caisson type reinforced concrete forming die 5 into a local deep pit excavation position of a foundation pit surface as shown in figure 1, starting to excavate mucky soil 2 manually, after the micro open caisson type reinforced concrete forming die 5 sinks to a target elevation, correcting the micro open caisson type reinforced concrete forming die 5, backfilling a sandstone anti-filtration layer 6 and pumping water as shown in figure 2;
step 4): after the step 3) is finished, mounting a bottom-sealing precast slab 7, and as shown in fig. 3, enabling the precast tubular pile 1 to penetrate out of the middle of the bottom-sealing precast slab 7, connecting the bottom-sealing precast slab 7 with a precast moulding bed bracket 4 at the lower part of the inner surface of the miniature open caisson type reinforced concrete moulding bed 5, and plugging by adopting quick hardening mortar;
step 5): paving and sticking the additionally arranged waterproof coiled material 8 on the bottom-sealing prefabricated plate 7 as shown in figure 4;
step 6): pouring concrete 9 of the waterproof coiled material protective layer as shown in figure 5;
step 7): and finally, constructing a basement waterproof layer 10 and a foundation raft on the exposed inner surfaces of the waterproof coiled material protective layer concrete 9 and the miniature open caisson type reinforced concrete forming die 5, as shown in figure 6.
The construction method integrates the foundation pit supporting function, the foundation pit brick moulding bed function and the inverted filter layer drainage well function, has simple and safe construction process, high speed and low manufacturing cost, can save larger dewatering measure cost and shorten the construction period. Compared with the traditional process of draining underground water through precipitation, excavating a foundation pit and building a brick moulding bed, the method obviously reduces the construction process steps, accelerates the construction progress, improves the enclosure and moulding bed system of the structural concrete quality, and solves the problems of more process steps, slow construction progress, poor construction quality and potential safety hazard of the traditional local pit part bottom plate pit construction method.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (2)
1. A miniature open caisson prefabricated molding bed construction method for silt flow sand area that groundwater is abundant, its characterized in that: the method comprises the following steps:
step 1): excavating earth to the bottom of a large-surface foundation pit, namely to the top surface elevation of the precast tubular pile (1);
step 2): prefabricating a miniature open caisson type reinforced concrete moulding bed (5) in advance according to the size and the depth of a local deep pit plane;
step 3): placing the miniature open caisson type reinforced concrete forming die (5) into an excavated foundation pit, inserting a prefabricated forming die cutting foot (3) of the miniature open caisson type reinforced concrete forming die (5) into a local deep pit excavation position of a foundation pit surface, starting to excavate mucky soil (2) manually, making the miniature open caisson type reinforced concrete forming die (5) sink to a target elevation, correcting the miniature open caisson type reinforced concrete forming die (5), backfilling a sandstone reverse filtration layer (6) and pumping water;
step 4): after the step 3) is finished, mounting a bottom-sealing precast slab (7) to enable the precast tubular pile (1) to penetrate out of the middle of the bottom-sealing precast slab (7), connecting the bottom-sealing precast slab (7) with a precast moulding bed bracket (4) at the lower part of the inner surface of the miniature open caisson type reinforced concrete moulding bed (5), and plugging by adopting quick hardening mortar;
step 5): additionally-arranged waterproof coiled materials (8) are paved on the bottom-sealing prefabricated plate (7);
step 6): pouring concrete (9) of the waterproof coiled material protective layer;
step 7): and finally, constructing a basement waterproof layer (10) and a foundation raft on the exposed inner surfaces of the waterproof coiled material protective layer concrete (9) and the miniature open caisson type reinforced concrete forming die (5).
2. The method of constructing a micro open caisson prefabricated formworks for a zone where groundwater is rich in sludge flowing sand according to claim 1, wherein: the miniature open caisson type reinforced concrete forming die (5) is of a bottomless barrel structure, a prefabricated forming die cutting foot (3) is arranged at the lower end of the miniature open caisson type reinforced concrete forming die (5), and a prefabricated forming die bracket (4) is arranged at the lower part of the inner surface of the miniature open caisson type reinforced concrete forming die (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011409238.1A CN112554203A (en) | 2020-12-03 | 2020-12-03 | Miniature open caisson prefabricated molding bed construction method for silt flow sand area with abundant underground water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011409238.1A CN112554203A (en) | 2020-12-03 | 2020-12-03 | Miniature open caisson prefabricated molding bed construction method for silt flow sand area with abundant underground water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112554203A true CN112554203A (en) | 2021-03-26 |
Family
ID=75048530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011409238.1A Pending CN112554203A (en) | 2020-12-03 | 2020-12-03 | Miniature open caisson prefabricated molding bed construction method for silt flow sand area with abundant underground water |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112554203A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103205978A (en) * | 2013-04-18 | 2013-07-17 | 成军 | High-permeability zone under-water-level elevator foundation pit open caisson moulding bed construction method |
| CN103898915A (en) * | 2014-04-18 | 2014-07-02 | 中国二十二冶集团有限公司 | Anti-floating and waterstop construction method for small-area deep foundation pit of building |
| CN106638647A (en) * | 2016-12-31 | 2017-05-10 | 广东水利电力职业技术学院（广东省水利电力技工学校） | Underwater sunk shaft sealing method and sunk shaft |
| CN108442381A (en) * | 2017-02-16 | 2018-08-24 | 新疆北方建设集团有限公司 | A kind of cylinder open caisson deep foundation pit supporting construction method |
| CN109403340A (en) * | 2018-10-31 | 2019-03-01 | 中建三局第二建设工程有限责任公司 | A kind of construction method using open caisson as foundation pit enclosure structure |
-
2020
- 2020-12-03 CN CN202011409238.1A patent/CN112554203A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103205978A (en) * | 2013-04-18 | 2013-07-17 | 成军 | High-permeability zone under-water-level elevator foundation pit open caisson moulding bed construction method |
| CN103898915A (en) * | 2014-04-18 | 2014-07-02 | 中国二十二冶集团有限公司 | Anti-floating and waterstop construction method for small-area deep foundation pit of building |
| CN106638647A (en) * | 2016-12-31 | 2017-05-10 | 广东水利电力职业技术学院（广东省水利电力技工学校） | Underwater sunk shaft sealing method and sunk shaft |
| CN108442381A (en) * | 2017-02-16 | 2018-08-24 | 新疆北方建设集团有限公司 | A kind of cylinder open caisson deep foundation pit supporting construction method |
| CN109403340A (en) * | 2018-10-31 | 2019-03-01 | 中建三局第二建设工程有限责任公司 | A kind of construction method using open caisson as foundation pit enclosure structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110485470B (en) | Rectangular working well with pre-arranged jacking pipe door opening and sliding type rear wall in water-rich stratum and construction method of rectangular working well | |
| CN109026064B (en) | Construction method for large-span multi-arch tunnel with semi-bright and semi-dark | |
| CN212896422U (en) | Deep foundation pit water intercepting and draining device | |
| CN103741714A (en) | Construction method for full cover-excavation reverse method of underground engineering | |
| CN100510281C (en) | Semi-inverse construction method of super large diameter, ultra-burial depth storage pond | |
| CN110847199A (en) | Construction method for drainage of underground water of deep foundation pit | |
| CN108035379B (en) | Comprehensive pipe gallery and construction method thereof | |
| CN212477844U (en) | Basement drainage decompression anti-floating structure | |
| CN112095644A (en) | Deep foundation pit water intercepting and draining device and construction method thereof | |
| CN110206039B (en) | Construction method of Larsen steel sheet pile in pit under complex geological conditions | |
| CN110117959B (en) | Construction method for foundation pit support near river | |
| CN101413269A (en) | Vacuum curtain water stop and atmospheric pressure support deep pit digging construction method | |
| CN102116036B (en) | Method for constructing underground large building by combining top-down construction method technology with sequence construction method technology | |
| CN213143117U (en) | Assembled keyway basis retaining wall structure | |
| CN113152425A (en) | Combined freezing and reinforcing method for non-drainage excavation of large foundation pit | |
| CN112554203A (en) | Miniature open caisson prefabricated molding bed construction method for silt flow sand area with abundant underground water | |
| CN214497785U (en) | Hollow block rainwater infiltration inspection shaft | |
| CN211547830U (en) | Structure for preventing ground from being wetted | |
| CN210315908U (en) | Immersed tube type inspection well | |
| CN112695779A (en) | High-rise building foundation pit construction method for local precipitation of elevator shaft foundation pit | |
| CN111962632A (en) | Rainwater sewer and construction method thereof | |
| CN220908447U (en) | Prefabricated anti-floating well construction structure | |
| CN110792093A (en) | Construction method of foundation pit waterproof curtain and waterproof curtain | |
| CN219527659U (en) | Shallow buried groundwater level and soft soil layer pit-in-pit structure | |
| CN204753632U (en) | Underground parking garage is built to caisson structure based on prefabricated concatenation of stake on an empty stomach formula |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210326 |