CN107178088B - A kind of basement waterproofing foundation pit structure and its construction method - Google Patents
A kind of basement waterproofing foundation pit structure and its construction method Download PDFInfo
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- CN107178088B CN107178088B CN201710253029.4A CN201710253029A CN107178088B CN 107178088 B CN107178088 B CN 107178088B CN 201710253029 A CN201710253029 A CN 201710253029A CN 107178088 B CN107178088 B CN 107178088B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/18—Restraining of underground water by damming or interrupting the passage of underground water by making use of sealing aprons, e.g. diaphragms made from bituminous or clay material
- E02D19/185—Joints between sheets constituting the sealing aprons
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
The present invention relates to building underground engineering fields, more particularly to a kind of basement waterproofing foundation pit structure and its construction method, a kind of basement waterproofing foundation pit structure, it include: more root post stakes and the engineering pile in basement main body, foundation pit enclosure wall, basement reinforcing anti-seepage layer and foundation pit, a piece stand column pile and an engineering pile connect into a stanchion, engineering pile is arranged below stand column pile in the stanchion, the engineering pile bottom insertion water barrier or rock stratum, the stand column pile top are concordant with foundation pit elevation of top；The foundation pit enclosure wall is arranged in basement body side, and the basement bottom part body is provided with basement bottom board；The foundation pit enclosure wall is to form diaphram wall in such a way that the spliced prefabricated panel of muti-piece mutually splices；The lower section of the basement bottom board is arranged in the basement reinforcing anti-seepage layer, and side is connected with the foundation pit enclosure wall, and Formation cross-section is the structure of " H " shape.
Description
Technical field
The present invention relates to building underground engineering fields, and in particular to a kind of basement waterproofing foundation pit structure and its construction party
Method.
Background technique
Currently, similar Wuhan I grades of terrace diadactic structure geologic feature, the fine-grained sediment layer of top overbank phase, lower part is river
The coarse grain sedimentary of bed phase, bottom is the geologic structure of rock stratum, to achieve the effect that sealing, prevents periphery soil layer from drawing water and settles often
In the following ways: 1, seepage proof curtain construction is arranged before curtain to lithosphere or other clay water barriers according to design requirement
Other retaining structures such as bored concrete pile；2, the cast-in-place diaphram wall that antiseepage and retaining structure are integrated, wall depth equally reach
Lithosphere or water barrier, while as water proof antiseepage and retaining structure, leakage preventing structure runs through the diaphram wall of entire Soft Soil Layer
Underground water can effectively be completely cut off and pour in basement.This form of construction work has the disadvantage in that 1, diaphragm wall depth is big, construction cost
Height, on the basis of meeting hole bottom Resistant heave and stability requirement, it is more than 2 to 4 times that usual diaphram wall, which will generally surpass dozen depth,；
2, cast-in-situ wall is deeper, since degree control is more difficult, is difficult to ensure at the big pouring quality of groove depth, so with leading to adjacent width
Weak part is easily formed at lower continuous wall connector；Cause percolating water hidden danger, surrounding ground is caused to collapse and threaten foundation pit and is stable.
Summary of the invention
The purpose of the present invention, be in order to solve the problems in background technique, provide a kind of basement waterproofing foundation pit structure and
Its construction method.
Above-mentioned technical purpose of the invention has the technical scheme that
A kind of basement waterproofing foundation pit structure, comprising: basement main body, foundation pit enclosure wall, basement reinforcing anti-seepage layer and
More root post stakes and engineering pile in foundation pit, a stand column pile and an engineering pile connect into a stanchion, described
Engineering pile is arranged below stand column pile in stanchion, engineering pile bottom insertion water barrier or rock stratum, at the top of the stand column pile with
Foundation pit elevation of top is concordant；The foundation pit enclosure wall is arranged in basement body side, and the basement bottom part body is provided with
Basement bottom board；The foundation pit enclosure wall is continuous to form underground in such a way that the spliced prefabricated panel of muti-piece mutually splices
Wall；The lower section of the basement bottom board is arranged in the basement reinforcing anti-seepage layer, and side is connected with the foundation pit enclosure wall
It connects, Formation cross-section is the structure of " H " shape.
Preferably, the two sides of the spliced prefabricated panel are provided with assembled portion, between the spliced prefabricated panel
It is connected by assembled portion, half mouthful of grouting, the grouting of adjacent two pieces of spliced prefabricated panels is provided in the assembly portion
Half mouthful after splicing, forms grouting chamber.
Preferably, being provided with the splicing item being mutually matched and splicing slot in the assembly portion.
Preferably, the grouting is intracavitary to be provided with reinforcing bar and concrete.
Preferably, being provided with aperture on the length direction of the spliced prefabricated panel.
Preferably, being provided with reinforcing bar and concrete in the aperture.
Preferably, being arranged and having grouting layer between stand column pile stake bottom and engineering stake top.
Assembled building diaphram wall is carried out using spliced prefabricated panel, scene is greatly reduced pours the time, mentions
High construction efficiency, also, since wallboard is prefabricated, it is not in because of scene for pouring continuous wall compared to tradition
Pour and generate bubbling, crack the problems such as, the waterproof performance of prefabricated panel is very reliable.Meanwhile further through to grouting chamber into
Row pours, and thoroughly solves the hidden danger of stitching portion infiltration.
Preferably, foundation pit enclosure wall top portion is provided with closed armored concrete crown beam.
A kind of construction method of basement waterproofing foundation pit structure, includes the following steps,
(1) foundation pile engineering construction: one pile for one column mode is used to construct in foundation pit, the one pile for one column refers to
The stanchion of the stake of foundation pit inner column and engineering pile connected into, engineering pile are bored concrete pile, and stand column pile is concrete filled steel tube stand column pile, work
Journey stake is arranged below stand column pile, and engineering pile bottom is embedded in water barrier or rock stratum, and designed elevation is arrived in primary construction at the top of stand column pile；
The verticality for guaranteeing stand column pile in construction carries out grouting behind shaft or drift lining process to stake bottom and stake middle side part, to guarantee the bearing capacity of stand column pile
And reduce sedimentation；
(2) control groundwater pressure controls underground water before foundation pit enclosure wall, basement reinforcing anti-seepage layer are built
Pressure prevents from bottom heave and dashes forward to gush generation；
(3) foundation pit is slotted, and opens up the supporting wall chase to the installation of foundation pit enclosure wall；
(4) diaphram wall is installed, after spliced splicing prefabricated wallboard is installed in supporting wall chase, using grouting way
Grouting chamber and aperture are filled up, guarantee that diaphram wall is securely impermeable；
(5) basement reinforcing anti-seepage layer building, by the soil property of basement bottom by the way of injecting paste material high-pressure grouting
It is modified, one piece of waterproof layer being connected with foundation pit enclosure is formed, as basement reinforcing anti-seepage layer；Basement reinforcing anti-seepage layer with
Foundation pit enclosure forms the structure that a longitudinal cross-section is " H " type in Soft Soil Layer, i.e. basement reinforcing anti-seepage layer depth is greater than ground
The depth of lower room bottom plate is less than the depth of foundation pit enclosure；
(6) earth excavation digs out the intracorporal earthwork of basement master, and carry out basement floor builds construction.
Preferably, in the step 2, Groundwater Control pressure mode be detect in construction area artesian water buried depth and
Head height controls underground water using dewatering well and inverted well combined technology, prevents bottom heave in conjunction with excavation of foundation pit depth
And dash forward and gush generation, during earth excavation and basement reinforcing anti-seepage layer is constructed before forming intensity, artesian aquifer precipitation
Well maintains pressure and keeps working condition.
Preferably, closed armored concrete crown beam should be arranged at the top of diaphram wall in the step 4；Crown beam
Height and width are determined by calculating, and width is not preferably less than the thickness of diaphram wall, and diaphram wall is constructed using framing, wall
Elongated top beam is arranged in favor of enhancing the globality of diaphram wall in top, and top beam preferably meets Tu Mianping with diaphram wall
Together, wall is led to retain, plays the role of earth-retaining slope protection to the above soil body of wall top, avoids having an adverse effect to surrounding enviroment,
The depth of diaphram wall wall top insert beam is not preferably less than 50mm, and the length that longitudinal reinforcement anchors into collar tie beam is preferably anchored by tension
It is required that determining.
Preferably, in high-pressure grouting, antiseepage extended layer, institute is perfused simultaneously outside foundation pit enclosure in the step 5
It states antiseepage extended layer and extends 1~2 meter to outside foundation pit.
Preferably, injecting paste material is injected into basement from foundation pit top high-voltage by grout hole and adds in the step 5
Gu impervious barrier position, 2 ~ 4 meters below the aperture depth of grout hole room bottom plate located underground, carried out in grout hole after mud jacking
Basement reinforcing anti-seepage layer is formed on the bottom of basement.
In conclusion beneficial effects of the present invention:
1. a kind of basement waterproofing foundation pit structure of the present invention, foundation pit construction quality are easy to control, basement is prevented
Water gets well and is easy to monitor, and quality control and repair and maintenance are easy.
2. a kind of basement waterproofing foundation pit structure of the present invention does not need to arrive the depth construction of foundation pit enclosure wall
Subsurface rock layer has saved building materials and construction time, and the foundation pit enclosure wall and basement reinforcing anti-seepage layer knot for passing through " H " shape
Structure effectively prevents the leakage of underground water.
3. a kind of construction method of basement waterproofing foundation pit structure of the present invention is subtracted using spliced prefabricated panel
Lacked scene the time is poured to diaphram wall, construction efficiency of having made a draft, and to the stitching portion of spliced prefabricated panel into
Row is poured to reinforce waterproof performance.
Detailed description of the invention
Fig. 1 is the scheme of installation of neutral stanchion and engineering pile of the invention；
Fig. 2 is the building schematic diagram of basement reinforcing anti-seepage layer in the present invention；
Fig. 3 is the structural schematic diagram of basement main body of the present invention；
Fig. 4 is the assembling schematic diagram of spliced prefabricated panel in the present invention；
Fig. 5 is the connection schematic diagram of neutral stanchion and engineering pile of the invention.
Specific embodiment
Following specific embodiments are only explanation of the invention, are not limitation of the present invention, art technology
Personnel can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as
All by the protection of Patent Law in scope of the presently claimed invention.
With embodiment, the present invention is described in detail with reference to the accompanying drawing.
Embodiment 1:
According to FIG. 1 to FIG. 5, a kind of basement waterproofing foundation pit structure, comprising: basement main body 5, foundation pit enclosure wall 1,
More root post stakes 3 and engineering pile 4 in basement reinforcing anti-seepage layer 2 and foundation pit, a root post stake 3 are connect with an engineering pile 4
At a stanchion, engineering pile 4 is arranged below stand column pile 3 in stanchion, and 4 bottom of engineering pile is embedded in water barrier or rock stratum, stand column pile 3
Top is concordant with foundation pit elevation of top, according to Fig.5, is arranged and has slip casting between 3 bottoms of stand column pile and 4 stake top of engineering pile
Layer；Foundation pit enclosure wall 1 is arranged in 5 side of basement main body, and 5 bottom of basement main body is provided with basement bottom board 6；Foundation pit enclosure
Wall 1 is to form diaphram wall in such a way that the spliced prefabricated panel 100 of muti-piece mutually splices, and is set at the top of foundation pit enclosure wall 1
It is equipped with closed armored concrete crown beam；The lower section of basement bottom board 6, side and base is arranged in basement reinforcing anti-seepage layer 2
Pit enclosure wall 1 is connected, and Formation cross-section is the structure of " H " shape.
According to Fig.4, the two sides of spliced prefabricated panel 100 are provided with assembled portion 110, spliced prefabricated panel 100
Between be connected by assembly portion 110, be provided with and be in the milk half mouthful 113 in assembled portion 110, adjacent two pieces of spliced prefabricated panels
Half mouthful 113 of grouting of 100 forms grouting chamber 114, is provided with 111 He of splicing item being mutually matched in assembled portion 110 after splicing
Splice slot 112, is provided with reinforcing bar 115 and concrete in the chamber 114 that is in the milk, is arranged on the length direction of spliced prefabricated panel 100
There is aperture 120, reinforcing bar 115 and concrete are provided in aperture 120.
According to Fig. 1, Fig. 2 and Fig. 3, a kind of construction method of basement waterproofing foundation pit structure includes the following steps,
One, foundation pile engineering construction: one pile for one column mode is used to construct in foundation pit, one pile for one column refers to foundation pit
The stanchion of inner column stake 3 and engineering pile 4 connected into, engineering pile 4 are bored concrete pile, and stand column pile 3 is concrete filled steel tube stand column pile, work
Journey stake 4 is arranged below stand column pile 3, and 4 bottom of engineering pile is embedded in water barrier or rock stratum, the primary construction in 4 top of stand column pile to design
Absolute altitude；The verticality for guaranteeing stand column pile 3 in construction carries out grouting behind shaft or drift lining process to stake bottom and stake middle side part, to guarantee stand column pile 3
Bearing capacity simultaneously reduces sedimentation.
Two, groundwater pressure is controlled, before foundation pit enclosure wall 1, basement reinforcing anti-seepage layer 2 are built, detects construction area
Artesian water buried depth and head height in domain, in conjunction with excavation of foundation pit depth, using dewatering well and inverted well combined technology control ground
Launching stress, during earth excavation and basement reinforcing anti-seepage layer 2 is constructed before forming intensity, artesian aquifer dewatering well
It maintains pressure and keeps working condition, prevent from bottom heave and dash forward to gush generation.
Three, foundation pit is slotted, and opens up the supporting wall chase installed to foundation pit enclosure wall 1.
Four, diaphram wall is installed, after the spliced splicing of prefabricated panel 100 is installed in supporting wall chase, using grouting side
To be in the milk chamber 114 and aperture 120 of formula is filled up, and guarantees that diaphram wall is securely impermeable；Setting is closed at the top of diaphram wall
Armored concrete crown beam；Crown beam width is not preferably less than the thickness of diaphram wall, and diaphram wall is constructed using framing, and wall top is set
Elongated top beam is set in favor of enhancing the globality of diaphram wall, it is concordant that top beam preferably meets native face with diaphram wall, with
Just retain and lead wall, play the role of earth-retaining slope protection to the above soil body of wall top, avoid having an adverse effect to surrounding enviroment, underground connects
The depth of continuous wall wall top insertion collar tie beam is not preferably less than 50mm, and it is preferably true by tension anchoring requirement that longitudinal reinforcement anchors into the length in collar tie beam
It is fixed.
Five, basement reinforcing anti-seepage layer 2 constructs, by the soil property of basement bottom by the way of injecting paste material high-pressure grouting
Modified, injecting paste material is injected into 2 position of basement reinforcing anti-seepage layer from foundation pit top high-voltage by grout hole 201, states grout hole
2 ~ 4 meters below 201 aperture depth room bottom plate located underground, formed after carrying out mud jacking in grout hole 201 in the bottom of basement
One piece of waterproof layer being connected with foundation pit enclosure 1, as basement reinforcing anti-seepage layer 2；Basement reinforcing anti-seepage layer 2 is enclosed with foundation pit
Shield 1 forms the structure that a longitudinal cross-section is " H " type in Soft Soil Layer, i.e. 2 depth of basement reinforcing anti-seepage layer is greater than basement
The depth of bottom plate 6 is less than the depth of foundation pit enclosure 1, and basement reinforcing anti-seepage layer 2 is with a thickness of 2 ~ 3 meters, and in high-pressure grouting,
Simultaneously in 1 outer filling antiseepage extended layer 21 of foundation pit enclosure, antiseepage extended layer 21 extends 1~2 meter to outside foundation pit.
Six, earth excavation digs out the earthwork in basement main body 5, and carry out basement floor builds construction.
Claims (10)
1. a kind of basement waterproofing foundation pit structure characterized by comprising basement main body (5), foundation pit enclosure wall (1), underground
More root post stakes (3) in room reinforcing anti-seepage floor (2) and foundation pit and engineering pile (4), a stand column pile (3) with described in one
Engineering pile (4) connects into a stanchion, and engineering pile (4) setting is below stand column pile (3) in the stanchion, the engineering pile (4)
Bottom is embedded in water barrier or rock stratum, and stand column pile (3) top is concordant with foundation pit elevation of top；The foundation pit enclosure wall (1) sets
It sets in basement main body (5) side, basement main body (5) bottom is provided with basement bottom board (6)；The foundation pit enclosure wall
It (1) is to form diaphram wall in such a way that the spliced prefabricated panel of muti-piece (100) mutually splices；The basement is reinforced anti-
Infiltration layer (2) is arranged in the lower section of the basement bottom board (6), and side is connected with the foundation pit enclosure wall (1), Formation cross-section
For the structure of " H " shape.
2. a kind of basement waterproofing foundation pit structure according to claim 1, which is characterized in that the spliced prefabricated panel
(100) two sides are provided with assembled portion (110), are connected between the spliced prefabricated panel (100) by assembly portion (110)
It connects, half mouthful (113) of grouting, the grouting of adjacent two pieces of spliced prefabricated panels (100) is provided in the assembly portion (110)
After splicing, grouting chamber (114) is formed for half mouthful (113).
3. a kind of basement waterproofing foundation pit structure according to claim 2, which is characterized in that on the assembly portion (110)
It is provided with the splicing item (111) being mutually matched and splicing slot (112).
4. a kind of basement waterproofing foundation pit structure according to claim 3, which is characterized in that in the grouting chamber (114)
It is provided with reinforcing bar (115) and concrete.
5. a kind of basement waterproofing foundation pit structure according to claim 4, which is characterized in that the spliced prefabricated panel
(100) aperture (120) are provided on length direction.
6. a kind of basement waterproofing foundation pit structure according to claim 5, which is characterized in that set in the aperture (120)
It is equipped with reinforcing bar (115) and concrete.
7. a kind of basement waterproofing foundation pit structure according to claim 1, which is characterized in that stand column pile (3) the stake bottom
It is arranged and has grouting layer between engineering pile (4) stake top.
8. a kind of construction method of basement waterproofing foundation pit structure, which is characterized in that include the following steps,
(1) foundation pile engineering construction: one pile for one column mode is used to construct in foundation pit, the one pile for one column refers to foundation pit
The stanchion of inner column stake (3) and engineering pile (4) connected into, engineering pile (4) are bored concrete pile, and stand column pile (3) is concrete filled steel tube
Stand column pile, below stand column pile (3), engineering pile (4) bottom is embedded in water barrier or rock stratum, stand column pile (4) top for engineering pile (4) setting
It once constructs to designed elevation in portion；The verticality for guaranteeing stand column pile (3) in construction carries out grouting behind shaft or drift lining work to stake bottom and stake middle side part
Sequence, to guarantee the bearing capacity of stand column pile (3) and reduce sedimentation；
(2) groundwater pressure is controlled, before foundation pit enclosure wall (1), basement reinforcing anti-seepage layer (2) are built, controls underground water
Pressure, prevent bottom heave and prominent gush generation；
(3) foundation pit is slotted, and opens up the supporting wall chase to foundation pit enclosure wall (1) installation；
(4) diaphram wall is installed, after spliced prefabricated panel (100) splicing is installed in supporting wall chase, using grouting way
It will be in the milk chamber (114) and aperture (120) is filled up, and guarantee that diaphram wall will be securely impermeable；
(5) basement reinforcing anti-seepage layer (2) constructs, by the soil property of basement bottom by the way of injecting paste material high-pressure grouting
It is modified, one piece of waterproof layer being connected with foundation pit enclosure (1) is formed, as basement reinforcing anti-seepage layer (2)；Basement is reinforced anti-
Infiltration layer (2) and foundation pit enclosure (1) form the structure that a longitudinal cross-section is " H " type, i.e. basement reinforcing anti-seepage in Soft Soil Layer
The depth that layer (2) depth is greater than basement bottom board (6) is less than the depth of foundation pit enclosure (1)；
(6) earth excavation digs out the earthwork in basement main body (5), and carry out basement floor builds construction.
9. a kind of construction method of basement waterproofing foundation pit structure according to claim 8, which is characterized in that the step
In five, in high-pressure grouting, antiseepage extended layer (21) are perfused simultaneously outside in foundation pit enclosure (1).
10. a kind of construction method of basement waterproofing foundation pit structure according to claim 8, which is characterized in that the step
In rapid five, injecting paste material is injected into basement reinforcing anti-seepage layer (2) position, institute from foundation pit top high-voltage by grout hole (201)
2 ~ 4 meters are stated below the aperture depth room bottom plate located underground of grout hole (201), in underground after progress mud jacking in grout hole (201)
Basement reinforcing anti-seepage floor (2) are formed on the bottom of room.
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| CN201710253029.4A CN107178088B (en) | 2017-04-18 | 2017-04-18 | A kind of basement waterproofing foundation pit structure and its construction method |
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| CN201710253029.4A CN107178088B (en) | 2017-04-18 | 2017-04-18 | A kind of basement waterproofing foundation pit structure and its construction method |
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| CN110056011B (en) * | 2019-04-17 | 2020-12-08 | 周峻宇 | Basement ground waterproof structure construction process |
| CN111236245B (en) * | 2020-01-10 | 2021-11-05 | 深圳市蛇口招商港湾工程有限公司 | Small foundation pit excavation protection structure and construction method thereof |
| CN113550329A (en) * | 2021-09-03 | 2021-10-26 | 朱彦达 | Multilayer basement supporting structure and supporting construction method |
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| CN201835293U (en) * | 2010-10-29 | 2011-05-18 | 贵阳铝镁设计研究院 | Structure of post-cast strip for underground building |
| CN102127974B (en) * | 2011-04-18 | 2012-08-29 | 上海现代建筑设计(集团)有限公司 | Design and construction method of additional cellar under existing building |
| CN103103988A (en) * | 2013-01-21 | 2013-05-15 | 安徽省城建设计研究院 | Foundation ditch construction method of horizontal bracing structure of central island floor slaps |
| JP6186267B2 (en) * | 2013-12-19 | 2017-08-23 | 鹿島建設株式会社 | How to build an underground tunnel |
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Effective date of registration: 20190102 Address after: 430000 Training Building No. 312-A43, 3rd Floor, Dawning Plaza, 465 Guanshan Avenue, Donghu New Technology Development Zone, Wuhan City, Hubei Province Applicant after: Wuhan Zhengyuan Geotechnical Technology Co., Ltd. Address before: 430061 Jiaxin Garden, Xujiapeng, Wuchang District, Wuhan City, Hubei Province, Phase 2, 1 Building, 1 Unit 1802 Applicant before: Wuhan Chi and Geotechnical Engineering Co., Ltd. |
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| GR01 | Patent grant |