CN114960778B - Basement anti-floating node based on supporting structure and construction process thereof - Google Patents
Basement anti-floating node based on supporting structure and construction process thereof Download PDFInfo
- Publication number
- CN114960778B CN114960778B CN202210681461.4A CN202210681461A CN114960778B CN 114960778 B CN114960778 B CN 114960778B CN 202210681461 A CN202210681461 A CN 202210681461A CN 114960778 B CN114960778 B CN 114960778B
- Authority
- CN
- China
- Prior art keywords
- floating
- supporting structure
- dowel bar
- basement
- cantilever beam
- 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.)
- Active
Links
- 238000007667 floating Methods 0.000 title claims abstract description 170
- 238000010276 construction Methods 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000008569 process Effects 0.000 title claims abstract description 16
- 238000010008 shearing Methods 0.000 claims description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 230000003014 reinforcing effect Effects 0.000 claims description 12
- 239000002023 wood Substances 0.000 claims description 11
- 239000003337 fertilizer Substances 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- 238000013461 design Methods 0.000 abstract description 6
- 230000002787 reinforcement Effects 0.000 description 9
- 238000011161 development Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000003673 groundwater Substances 0.000 description 3
- 239000004566 building material Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 210000003608 fece Anatomy 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000010871 livestock manure Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
Classifications
-
- 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
- E02D31/10—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 soil pressure or hydraulic pressure
- E02D31/12—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 soil pressure or hydraulic pressure against upward hydraulic pressure
-
- 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
-
- 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
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/04—Making large underground spaces, e.g. for underground plants, e.g. stations of underground railways; Construction or layout thereof
-
- 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
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Sustainable Development (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
The disclosure relates to a basement anti-floating node based on a supporting structure and a construction process thereof. The anti-floating node comprises a supporting structure, a connection node of a foundation slab and a basement top plate, wherein the connection node of the supporting structure and the foundation slab comprises a supporting structure, a first dowel bar, a first anti-floating cantilever beam and the foundation slab, a shear groove is formed in the supporting structure, the first dowel bar is embedded in the shear groove, one end of the first anti-floating cantilever beam is integrally cast with the shear groove through the first dowel bar, and the other end of the first anti-floating cantilever beam extends to the upper part of the foundation slab; the support structure and the connection node of basement roof include support structure, second dowel, second anti cantilever beam and basement roof that floats, and second anti cantilever beam one end is anchored in support structure top through the second dowel, and the other end passes through the second dowel and inserts in the basement roof. The support structure and the basement main body structure form a whole together anti-floating structure through reasonable node structural design, so that the number of anti-floating piles and anti-floating anchors is reduced, and the construction cost is saved.
Description
Technical Field
The disclosure relates to the technical field of building construction, in particular to a basement anti-floating node based on a supporting structure and a construction process thereof.
Background
With the rapid development of urban process in China, urban land resources in China, especially land resources in large and medium cities, are increasingly scarce, and become one of important constraint factors for urban economic development, so that the development and utilization directions of space resources are also increasingly developed towards underground, large-scale utilization of underground space is started, but underground space development usually encounters areas with higher underground water levels, when the buried depth of a basement exceeds the underground water level, buoyancy occurs on the bottom surface of a structural foundation, the buoyancy generated by the underground structure for discharging underground water can be balanced by the dead weight of the structure and the resistance generated by an anti-floating body system, the anti-floating problem of the underground structure is also increasingly prominent with the increase of the buried depth, the upward floating force of the underground water is only insufficient due to the dead weight of the structure, the structure can have risks of upward floating, deformation and cracking, the bottom plate of the basement is damaged by uplift, and even the whole underground structure is damaged by floating.
The prior structure anti-floating measures are as follows: the anti-floating anchor rod, the anti-floating pile and the drain well are arranged on the structure, and holes are reserved on the bottom plate. However, the construction process of the anti-floating anchor rod and the anti-floating pile is complex, and the construction cost is high; the holes are reserved on the bottom plate, the drainage well is arranged, a large number of water pumps and operators need to be arranged to periodically patrol and timely pump and drain underground water, the later-period long-term operation and maintenance cost is high, and the technology is required to be guaranteed to be feasible, safe and reliable, and the method can be adopted. In addition, no matter what anti-floating measures are adopted in the anti-floating structure in the prior art, independent design and independent implementation are required, the process is complex, and the construction cost is increased.
The foundation pit support measures are adopted in the general basement, and the foundation pit support is used for guaranteeing the safety of underground structure construction and surrounding environment of the foundation pit, retaining, reinforcing and protecting measures are adopted for the soil body of the side wall of the foundation pit and the surrounding environment, and the common foundation pit support schemes comprise a slope releasing scheme, a bored pile or pile anchor support scheme, an underground diaphragm wall and the like. Usually, the foundation pit supporting structure and the anti-floating structure are respectively arranged, and after the fertilizer groove is backfilled, the supporting structure loses the functions and the effects, so that great engineering waste is caused.
Therefore, it is necessary to design a basement anti-floating node combining the supporting structure and the anti-floating measure, so that the supporting structure and the basement main body structure form a whole to be anti-floating together, and the method has important significance for the development of the existing underground engineering anti-floating technology.
Disclosure of Invention
In view of the shortcomings of the prior art, a primary object of the present disclosure is to provide a basement anti-floating node based on a supporting structure and a construction process thereof, so as to solve one or more problems in the prior art.
The technical scheme of the present disclosure is as follows:
The first aspect of the present disclosure provides a basement anti-floating node based on supporting structure, including supporting structure and the connected node of foundation mat and supporting structure and the connected node of basement roof, wherein: the connecting node of the supporting structure and the foundation slab comprises a supporting structure, a first dowel bar, a first anti-floating cantilever beam and the foundation slab, wherein the foundation slab is cantilevered into the underground chamber fertilizer groove for a certain length, a shear groove is reserved on one side of the supporting structure facing the foundation slab, one end of the first dowel bar is anchored in the supporting structure, the other end of the first dowel bar is embedded in the shear groove during construction of the supporting structure, the other end of the first dowel bar is used as a main bar of the first anti-floating cantilever beam during construction of the first anti-floating cantilever beam, one end of the first anti-floating cantilever beam and the shear groove are integrally cast into a whole, the other end of the first anti-floating cantilever beam extends to the upper side of the foundation slab, and the lower surface of the first anti-floating cantilever beam is in close contact with the upper surface of the foundation slab; the connecting node of supporting construction and basement roof includes supporting construction, second dowel, second anti cantilever beam and basement roof, the one end of second dowel is anchored in supporting construction top when the construction the supporting construction, and the other end is buckled and pre-buried in supporting construction side, is under construction as the main muscle of second anti cantilever beam that floats when the second is anchored in basement outer wall or basement roof, second anti cantilever beam and basement roof are integrative to be pour into a whole.
In some embodiments, the shearing groove is filled with extruded sheets, wood boxes or square timber when the supporting structure is constructed, and the outer part is fixedly connected with the main ribs of the supporting structure through a reinforcing mesh.
In some embodiments, one end of the first dowel bar is inserted into the supporting structure through the shearing resistant groove, is bent in an L-shaped arrangement in the supporting structure and is welded and fixed with the main reinforcement of the supporting structure, the other end of the first dowel bar is bent in the shearing resistant groove when the supporting structure is constructed, the main reinforcement serving as the first floating cantilever is straightened when the first floating cantilever is constructed, or the other end of the first dowel bar is connected with the reinforcing bar connector and is embedded in the shearing resistant groove when the supporting structure is constructed, and the reinforcing bar connector is used for connecting the main reinforcement of the first floating cantilever when the first floating cantilever is constructed.
In some embodiments, the second dowel bar is provided with a water-swellable rubber water stop ring at a location in contact with the outer wall of the basement or the outer edge of the roof of the basement.
In some embodiments, the anti-floating node further comprises a connection node of the support structure with at least one intermediate floor slab, the connection node comprising:
The cantilever beam comprises a supporting structure, third dowel bars, third anti-floating cantilever beams and a middle layer floor slab, wherein the middle layer floor slab is overhanging for a certain length into a basement fertilizer groove, a shearing resistant groove is reserved on one side of the supporting structure facing the middle layer floor slab, one end of each third dowel bar is anchored in the supporting structure, the other end of each third dowel bar is embedded in the shearing resistant groove during construction of the supporting structure, the third anti-floating cantilever beams are used as main bars of the third anti-floating cantilever beams during construction, one end of each third anti-floating cantilever beam is integrally cast into a whole with the shearing resistant groove, the other end of each third anti-floating cantilever beam extends to the upper side of the overhanging length of the middle layer floor slab, and the lower surface of each third anti-floating cantilever beam is in close contact with the upper surface of the overhanging length of the middle layer floor slab.
In some embodiments, an expanding agent is arranged in the first anti-floating cantilever beam and/or the third anti-floating cantilever beam, so that the first anti-floating cantilever beam is in close contact with the basement bottom plate and/or the third anti-floating cantilever beam is in close contact with the middle floor slab, and a small amount of prestress is provided, so that active anti-floating is realized.
In some embodiments, the support structure is a support pile, and the shear groove is arc-shaped in the cross section of the support pile.
In some embodiments, the pile top of the support pile is provided with a crown beam, one end of the second dowel bar is inserted into the crown beam, is bent in an L-shaped arrangement in the crown beam, and is welded and fixed with the main dowel bar of the support pile.
In some embodiments, the shear groove height and width are not less than the height and width of the first anti-floating beam and the depth is not less than 150mm.
Another aspect of the present disclosure provides a construction process of an anti-floating node according to the first aspect, including the steps of:
Step one: constructing a supporting structure, reserving a shearing-resistant groove, embedding a first dowel bar, and embedding a second dowel bar;
step two: digging a foundation pit;
Step three: arranging a foundation slab;
Step four: digging a shearing groove, and straightening a first dowel bar bent in the shearing groove;
step five: binding a first shear stirrup;
step six: pouring first anti-floating cantilever concrete;
step seven: maintaining the integral structure;
Step eight: straightening the second dowel bar;
Step nine: arranging a water-swelling rubber water stop ring;
Step ten: binding a second shear stirrup;
step eleven: the second anti-floating cantilever beam and the basement roof are integrally poured with concrete;
step twelve: and maintaining the whole structure.
The beneficial effects of this disclosure relative to prior art are: the invention provides a basement anti-floating node based on a supporting structure and a construction process thereof, the supporting structure and a basement main body structure are integrated through node structure design, under the action of water buoyancy, the supporting structure and the main body structure resist the water buoyancy together, the anti-floating effect provided by the supporting structure is considerable, the number of anti-floating piles, anti-pulling anchor rods or other anti-floating measures can be reduced, and meanwhile, the thickness of a foundation raft and raft reinforcement can be reduced; the construction process can be used for fast and efficient construction, so that building materials are saved, and construction cost is saved. Specifically, it has at least the following practical effects:
(1) Set up connected node between supporting construction and basement major structure, the connected node of supporting construction and foundation slab and the connected node of supporting construction and basement roof promptly make supporting construction and basement major structure form wholly through reasonable node structural design, connect more firmly, can make full use of supporting construction and provide sufficient resistance to plucking bearing capacity.
(2) The shearing resistant groove is arranged on one side of the supporting structure facing the foundation slab, the shearing resistant groove is filled with an extruded sheet, a wood box or square wood in a first construction stage, the outer portion is fixedly connected with a main rib of the supporting structure through a reinforcing mesh, the first dowel bar of the anti-floating cantilever beam is conveniently placed in the first construction stage, and the condition that the first dowel bar is broken, damaged and failed before the second construction stage is carried out is avoided.
(3) One end of the first dowel bar is anchored in the supporting structure through the shearing resistant groove in the first construction stage, and the other end of the first dowel bar is bent in the shearing resistant groove; in the second construction stage, one end of the first dowel bar is still arranged in the supporting structure and is welded and fixed with the main bar of the supporting structure, and the other end of the first dowel bar bent in the shearing resistant groove is straightened and then is used as the main bar of the first anti-floating cantilever beam to be poured together with concrete into the first anti-floating cantilever beam; the first anti-floating cantilever beam is integrally poured into a whole through the shear groove and the supporting structure, so that the whole structure is more stable, and the supporting structure can also play an anti-floating role through the first anti-floating cantilever beam under the condition that the foundation slab is not deformed.
Drawings
In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It will be apparent to those of ordinary skill in the art that the drawings in the following description are exemplary only and that other implementations can be obtained from the extensions of the drawings provided without inventive effort.
The structures, proportions, sizes, etc. shown in the present specification are shown only for the purposes of illustration and description, and are not intended to limit the scope of the disclosure, which is defined by the claims, but rather by the terms of structural modifications, proportions, or values of the dimensions, which are otherwise, used by those skilled in the art, without departing from the spirit and scope of the disclosure.
FIG. 1 is a schematic view of a connection node between a support structure and a foundation slab according to one embodiment of the present disclosure;
FIG. 2 is a schematic cross-sectional view of FIG. 1-1;
FIG. 3 is a schematic view of a connection node between a support structure and a basement roof according to one embodiment of the disclosure;
FIG. 4 is a schematic cross-sectional view of FIG. 3, taken along line 2-2;
FIG. 5 is a schematic view of a connection node of a support structure and an intermediate floor slab according to one embodiment of the present disclosure;
fig. 6 is a schematic cross-sectional view of fig. 5at 3-3.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the embodiments of the present disclosure will be further described in detail below with reference to the embodiments and the accompanying drawings. The illustrative embodiments of the present disclosure and their description herein are intended to explain the present disclosure and are not intended to be limiting of the present disclosure.
In the present disclosure, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this disclosure will be understood by those of ordinary skill in the art as the case may be.
It should be understood that the terms "comprises/comprising," "consists of … …," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a product, apparatus, process, or method that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such product, apparatus, process, or method as desired. Without further limitation, an element defined by the phrases "comprising/including … …," "consisting of … …" does not exclude that an additional identical element is present in a product, apparatus, process or method comprising the element.
It should be further understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience in describing the present disclosure and simplifying the description, and do not indicate or imply that the devices, components, or structures referred to must have a particular orientation, be configured or operated in a particular orientation, and are not to be construed as limiting the present disclosure.
Implementations of the present disclosure are described in detail below in connection with preferred embodiments.
The present disclosure relates to a basement anti-floating node based on a supporting structure, as shown in fig. 1-4, comprising a connection node of the supporting structure and a foundation slab 4 and a connection node of the supporting structure and a basement roof 40. Through the design of the connecting node, the supporting structure and the basement main body structure form a whole and are jointly anti-floating, the supporting structure is not used as a temporary structure, the supporting structure can be fully utilized after construction is completed, the sufficient anti-pulling bearing capacity is provided, and the waste of resources is reduced.
The base plate 4 and the basement top plate 40 are connected by basement outer walls 41.
It will be readily appreciated that the support structure may be a diaphragm wall, a support pile, etc., the present disclosure is preferably a support pile, and preferred embodiments of the present disclosure will be described in detail below using the support pile as an example.
In some embodiments, as shown in fig. 1 and 2, the connection node of the support pile 1 and the foundation slab 4 comprises a support structure, a first dowel bar 2, a first anti-floating cantilever beam 3 and the foundation slab 4; a shearing resistant groove 5 is reserved on one side of the support pile 1 facing the foundation slab 4; one end of the first dowel bar 2 is anchored in the support pile 1, the other end of the first dowel bar is pre-buried in the shear groove 5 when the support pile 1 is constructed, and the first dowel bar is used as a main bar of the first anti-floating cantilever beam 3 when the first anti-floating cantilever beam 3 is constructed; one end of the first anti-floating cantilever beam 3 and the shear groove 5 are integrally cast into a whole, the other end extends to the upper side of the foundation slab 4, and the lower surface is in close contact with the upper surface of the foundation slab 4.
As shown in fig. 3 and 4, the connection node between the support pile 1 and the basement roof 40 comprises a support structure, a second dowel 20, a second anti-floating cantilever 30 and the basement roof 40; one end of the second dowel bar 20 is anchored at the top of the support pile 1, the other end is bent at the construction support pile 1 and embedded at the side surface of the support pile 1, the second dowel bar is used as a main bar of the second anti-floating cantilever beam 30 and anchored in the basement outer wall 41 or the basement top plate 40 when the second anti-floating cantilever beam 30 is constructed, and the second anti-floating cantilever beam 30 and the basement top plate 40 are integrally cast into a whole.
In the present disclosure, through the connection node of the support pile 1 and the foundation slab 4 and the connection node of the support pile 1 and the basement roof 40, the support pile 1 and the basement main structure form a whole, the support pile 1 can provide a larger anti-pulling bearing capacity, the arrangement of the anti-shearing groove 5 can fully provide an anti-floating cantilever beam with an anti-shearing bearing capacity in the vertical direction, under the action of water buoyancy, the anti-floating pile can jointly resist the groundwater buoyancy with the basement main structure, the number of the anti-pulling piles and the anti-pulling anchor rods can be reduced, and meanwhile, the thickness of the foundation raft and the raft reinforcement can be reduced.
In some embodiments, referring to fig. 1 and 2, the foundation slab 4 overhangs into the underground chamber fertilizer tank by a certain length, which is generally not less than 300mm, one end of the first anti-floating cantilever beam 3 is arranged in the shear groove 5 of the support pile 1, and is integrally cast with the shear groove 5, the other end of the first anti-floating cantilever beam is arranged on the upper surface of the overhanging length of the foundation slab 4, and the dimension of the first anti-floating cantilever beam 3 on the upper surface of the overhanging length of the foundation slab 4 is not less than 200mm.
During the implementation, the first shear stirrup 31 perpendicular to the first dowel bar 2 is bound on the first dowel bar 2 in the first anti-floating cantilever beam 3, preferably, the expanding agent 32 is added in the concrete of the first anti-floating cantilever beam 3, the expanding agent enables the first anti-floating cantilever beam 3 to be in close contact with the basement bottom plate 4, a small amount of prestress is provided, active anti-floating is realized, and even if the foundation bottom plate 4 is not deformed, the supporting structure can play a role of anti-floating, so that the foundation bottom plate 4 is prevented from being deformed too much.
In some embodiments, longitudinal ribs 11 are provided in the support pile 1, and with continued reference to fig. 2, the shear groove 5 is arc-shaped on the cross section of the support pile 1, it should be understood that, because the support pile 1 is circular in cross section, the notch is provided on one side of the pile body of the support pile 1, when the support pile is seen from the cross section, the outermost edge is arc-shaped, and the rest edges are straight lines, so that an arc-shaped groove structure protruding outwards is integrally formed, and preferably, the width and the height of the shear groove 5 are equal to those of the first anti-floating cantilever beam 3, and the depth is not less than 150mm.
In some embodiments, the shearing groove 5 is reserved when the support pile 1 is constructed, and can be filled with extruded sheets, wood boxes or square wood, and the outer reinforcing mesh is firmly connected with the main reinforcement of the support structure, preferably, the D4 reinforcing mesh is firmly connected with the main reinforcement of the support pile 1. And when the shear groove 5 is used for constructing the first anti-floating cantilever beam 3, the extruded sheet, the wood box or the square wood is taken out, the complete shear groove 5 is presented, and the support pile 1 and the first anti-floating cantilever beam 3 are conveniently cast integrally through the shear groove 5.
In this disclosure, the setting of shear groove 5 is in order to pre-buried anti cantilever beam first dowel bar 2 when construction support stake 1 to and make support stake 1 pour as an organic wholely with first anti cantilever beam 3 through shear groove 5, realize that support stake 1 forms whole common anti floating with basement major structure. It should be understood that the shearing resistant slot 5 is filled with extruded sheets, wood boxes or square wood during construction of the support pile 1, and the outer portion is fixedly connected with the main reinforcement of the support pile 1 through a reinforcing mesh, so as to protect the shearing resistant slot 5 from being damaged, facilitate placement of the first tie bars 2 of the anti-floating cantilever during construction of the support pile 1, and avoid the situation that the first tie bars 2 are broken, damaged and fail before the first anti-floating cantilever 3 is constructed.
In some embodiments, the first dowel bar 2 is pre-buried in the shear groove 5, the area of the first dowel bar 2 is calculated and determined according to the requirement, one end of the first dowel bar 2 is inserted into the support pile 1 through the shear groove 5, is bent in an L-shaped arrangement in the support pile 1 and is welded and fixed with the longitudinal bar 11, the other end of the first dowel bar is bent in the shear groove 5 when the support pile 1 is constructed, and is vertically poured in the first anti-floating cantilever 3 when the first anti-floating cantilever 3 is constructed. It will be appreciated that the L-shaped arrangement herein is approximately L-shaped in that the first dowel 2 is bent downwardly or upwardly within the pile 1 towards the longitudinal bars 11 in order to be welded together in parallel with the longitudinal bars 11. Preferably, the part of the L-shaped section steel bar bent in the support pile 1 by the first dowel bar 2 and parallel to the longitudinal bar 11 has a size of 15d, and the part of the L-shaped section steel bar bent in the support pile 1 by the first dowel bar 2 and perpendicular to the longitudinal bar 11 has a size of 25d; the size of the reinforcing bars bent in the shear groove 5 at the time of constructing the support pile 1 by the first dowel 2 is determined according to the width of the manure groove, and it should be understood that d is the diameter of the first dowel 2.
In specific implementation, when the main rib of the first anti-floating cantilever is longer or the diameter is larger, the first dowel bar 2 cannot be bent in the shear groove 5, a method of embedding connectors in the shear groove 5 can be adopted, the connectors are preferably the I-level straight-thread steel bar connectors 6, and then the first anti-floating cantilever main rib, namely the first dowel bar 2, is connected on site.
In some embodiments, referring to fig. 3 and 4, the pile top of the support pile 1 is provided with a crown beam 7, one end of a second dowel bar 20 is inserted into the crown beam 7, bent in an L-shaped arrangement in the crown beam 7 and welded and fixed with the longitudinal bar 11 of the support pile 1, and the other end is bent and pre-buried at the side of the support pile 1 when the support pile 1 is constructed, and is used as a main bar of the second anti-floating cantilever 30 and anchored into the basement outer wall 41 or the basement roof 40 when the second anti-floating cantilever 30 is constructed.
It will be appreciated that the L-shaped arrangement herein is an approximately L-shaped formation of the second dowel 20 bent downwardly or upwardly in the crown beam 7 towards the longitudinal bars 11 of no higher Yu Guanliang height in order to be welded together in parallel with the longitudinal bars 11 in the crown beam 7. Preferably, the dimension of the part of the second dowel 20, which is bent in the crown beam 7 and parallel to the longitudinal bar 11, is 15d, the dimension of the part of the second dowel 20, which is bent in the crown beam 7 and perpendicular to the longitudinal bar 11, is 25d, and the dimension of the second dowel 20, which is bent and pre-buried in the side surface of the support pile 1 when the support pile 1 is constructed, is determined according to the width of the fertilizer slot, and it should be understood that d is the diameter of the second dowel 20.
In the present disclosure, the second tie bars 20 are bent in the basement outer wall 41 and are arranged in an L-shape or directly inserted into the basement top plate 40 when anchored into the basement outer wall 41 as the main bars of the second anti-floating cantilever 30 when the second anti-floating cantilever 30 is constructed. It should be understood that the L-shape herein is an approximately L-shape formed by bending up or down in the basement outer wall 41, since the second tie bars 20 are anchored to the basement outer wall 41 with a length greater than the thickness of the basement outer wall 41.
In specific implementation, a water-swellable rubber water stop ring 401 is arranged at a position where the second dowel bar 20 contacts the outer side edge of the basement outer wall 41 or the basement top plate 40. The second joint bars 20 are prevented from being rusted by contacting groundwater at the surface of the basement exterior wall 41 or the basement roof 40.
In specific implementation, the second shear stirrup 301 perpendicular to the second dowel bar 20 is bound on the second dowel bar 20 in the second anti-floating cantilever 30, and preferably, the expanding agent 32 is added into the concrete of the second anti-floating cantilever 30, so that the second anti-floating cantilever 30 is in close contact with the basement roof 40, a small amount of prestress is provided, active anti-floating is realized, and the supporting structure can play a role in anti-floating even if the basement roof 40 is not deformed, and prevent the basement roof 40 from being deformed too much.
In some embodiments, as shown in fig. 5 and 6, the anti-floating node further comprises a connection node of the supporting structure and the at least one layer of middle floor 400, and the present disclosure makes the supporting structure and the basement main structure fully connected to form a whole, together with anti-floating, to reduce deformation of the basement main structure through the connection node of the supporting structure and the at least one layer of middle floor 400, the connection node of the supporting structure and the foundation slab 4, and the connection node of the supporting structure and the basement top plate 40.
It should be understood that the intermediate floor 400 may be one, two, three or more layers, with only one intermediate floor 400 being preferred in the present disclosure.
In some embodiments, referring to fig. 5 and 6, the connection node of the support structure and the at least one intermediate floor 400 includes the support structure, the third dowel 200, the third anti-floating cantilever 300, and the intermediate floor 400; the middle floor 400 is overhanging for a certain length into the fertilizer groove of the basement; a shear groove 5 is reserved on the side of the support structure facing the middle floor slab 400; one end of the third dowel bar 200 is anchored in the supporting structure, the other end is pre-buried in the shearing resistant groove 5 when the supporting pile 1 is constructed, and the third dowel bar is used as a main bar of the third anti-floating cantilever 300 when the third anti-floating cantilever 300 is constructed; one end of the third anti-floating cantilever beam 300 is integrally cast with the shear groove 5, the other end extends to the upper part of the overhanging length of the intermediate floor slab 400, and the lower surface is in close contact with the upper surface of the overhanging length of the intermediate floor slab 400.
In some embodiments, with continued reference to fig. 5 and 6, the intermediate floor slab 400 overhangs into the underground chamber fertilizer tank by a certain length, generally not less than 300mm, one end of the third anti-floating cantilever beam 300 is arranged in the shear tank 5 of the supporting structure, integrally cast with the shear tank 5, the other end is arranged on the upper surface of the overhanging length of the intermediate floor slab 400, and the size of the third anti-floating cantilever beam 300 arranged on the upper surface of the overhanging length of the intermediate floor slab 400 is not less than 200mm.
In specific implementation, the third anti-floating cantilever 300 is arranged between the support structure and the basement outer wall 41, the third shear stirrup 3001 perpendicular to the third dowel bar 200 is bound on the third dowel bar 200 in the third anti-floating cantilever 300, preferably, the expanding agent 32 is added into the concrete of the third anti-floating cantilever 300, the expanding agent enables the third anti-floating cantilever 300 to be in close contact with the middle floor 400, a small amount of prestress is provided, active anti-floating is realized, the support structure can play an anti-floating role even if the middle floor 400 is not deformed, and the middle floor 400 is prevented from being deformed too much.
In some embodiments, the third dowel bar 200 is pre-buried in the shear groove 5, the area of the third dowel bar 200 is calculated and determined according to the requirement, one end of the third dowel bar 200 is inserted into the support pile 1 through the shear groove 5, is bent in an L-shaped arrangement in the support pile 1 and welded and fixed with the longitudinal bar 11, the other end of the third dowel bar is bent in the shear groove 5 when the support pile 1 is constructed, and is vertically poured in the third anti-floating cantilever 300 when the third anti-floating cantilever 300 is constructed. It should be understood that the L-shaped arrangement herein is an approximately L-shaped arrangement in which the third tie bars 200 are bent downward or upward in the direction of the longitudinal bars 11 within the support pile 1 in order to be welded together in parallel with the longitudinal bars 11. Preferably, the dimension of the portion of the L-shaped section bar bent in the support pile 1 by the third tie bar 200 parallel to the longitudinal bar 11 is 15d, the dimension of the portion of the L-shaped section bar bent in the support pile 1 perpendicular to the longitudinal bar 11 by the third tie bar 200 is 25d, and the dimension of the bar bent in the shear groove 5 by the third tie bar 200 in the fifth construction stage is determined according to the width of the groove, and it should be understood that d is the diameter of the third tie bar 200.
In specific implementation, when the third anti-floating cantilever beam main rib is longer and the third dowel bar 200 cannot be bent in the shear groove 5, a method of embedding connectors in the shear groove 5 can be adopted, and the connectors are preferably the I-stage straight-thread steel bar connectors 6, and then the third anti-floating cantilever beam main rib, namely the third dowel bar 200, is connected on site.
In some embodiments, as shown in fig. 5, the cantilever length lower portion of the intermediate floor slab 400 is provided with an armpit bracket 4001, so as to increase the anti-floating bearing capacity of the cantilever portion of the intermediate floor slab 400, and avoid cracking of the intermediate floor slab 400 caused by excessive buoyancy of groundwater.
The disclosure also includes construction process of the anti-floating node, which comprises the following concrete steps:
(1) When the basement has only one floor:
constructing a supporting structure, reserving a shearing resistant slot 5, embedding a first dowel bar 2 and embedding a second dowel bar 20;
Digging a foundation pit;
a construction foundation slab 4;
Digging a shearing groove 5, and straightening the first dowel bar 2 bent in the shearing groove 5;
binding a first shear stirrup 31;
pouring first anti-floating cantilever concrete;
Maintaining the integral structure;
continuously constructing an outer wall and a top plate of the basement;
straightening the second dowel bar 20;
A water-swellable rubber water stop ring 401 is arranged;
binding a second shear stirrup 301;
the second anti-floating cantilever 30 and the basement roof 40 are integrally poured with concrete;
and maintaining the whole structure.
(2) When the basement is more than one layer:
constructing a supporting structure, reserving a shearing resistant slot 5, embedding a first dowel bar 2, a third dowel bar 200 and embedding a second dowel bar 20;
Digging a foundation pit;
a construction foundation slab 4;
Digging a shearing groove 5, and straightening the first dowel bar 2 bent in the shearing groove 5;
binding a first shear stirrup 31;
pouring first anti-floating cantilever concrete;
Maintaining the integral structure;
Continuously constructing the basement outer wall;
Constructing a middle floor slab 400;
Digging a shearing groove 5, and straightening a third dowel bar 200 bent in the shearing groove 5;
Binding a third shearing resistant stirrup 3001;
pouring third anti-floating cantilever concrete;
Maintaining the integral structure;
continuously constructing an outer wall and a top plate of the basement;
straightening the second dowel bar 20;
A water-swellable rubber water stop ring 401 is arranged;
binding a second shear stirrup 301;
the second anti-floating cantilever 30 and the basement roof 40 are integrally poured with concrete;
and maintaining the whole structure.
The basement anti-floating node based on the supporting structure, which is provided by the disclosure, is designed through a node structure, so that the supporting structure and the basement main structure form a whole, the supporting structure and the basement main structure resist water buoyancy together under the action of water buoyancy, the supporting structure is not used as a temporary structure, the supporting structure can be fully utilized after construction is finished, the supporting structure is turned into wealth, the sufficient anti-pulling bearing capacity is provided, the number of anti-pulling piles, anti-pulling anchor rods or other anti-floating measures can be reduced, meanwhile, the thickness of a foundation raft and raft reinforcement can be reduced, building materials are saved, and the anti-floating node can be widely applied to various underground buildings.
The foregoing description of the preferred embodiments of the present disclosure is not intended to limit the disclosure, but is intended to cover any modifications, equivalents, and alternatives falling within the spirit and principles of the present disclosure.
Claims (8)
1. Basement anti-floating node based on supporting construction, its characterized in that includes the connected node of supporting construction and foundation mat and the connected node of supporting construction and basement roof, wherein:
The connecting node of the supporting structure and the foundation slab comprises a supporting structure, a first dowel bar, a first anti-floating cantilever beam and the foundation slab, wherein the foundation slab is cantilevered into the underground chamber fertilizer groove for a certain length, a shear groove is reserved on one side of the supporting structure facing the foundation slab, one end of the first dowel bar is anchored in the supporting structure, the other end of the first dowel bar is embedded in the shear groove during construction of the supporting structure, the other end of the first dowel bar is used as a main bar of the first anti-floating cantilever beam during construction of the first anti-floating cantilever beam, one end of the first anti-floating cantilever beam and the shear groove are integrally cast into a whole, the other end of the first anti-floating cantilever beam extends to the upper side of the foundation slab, and the lower surface of the first anti-floating cantilever beam is in close contact with the upper surface of the foundation slab; an expanding agent is added into the concrete of the first anti-floating cantilever beam, so that the first anti-floating cantilever beam is in close contact with a basement bottom plate, and a small amount of prestress is provided, so that active anti-floating is realized; the height and the width of the shearing resistant groove are equal to those of the first anti-floating beam, and the depth is not less than 150mm;
The connecting node of the supporting structure and the basement roof comprises a supporting structure, a second dowel bar, a second anti-floating cantilever and the basement roof, wherein one end of the second dowel bar is anchored at the top of the supporting structure when the supporting structure is constructed, the other end of the second dowel bar is bent and embedded at the side surface of the supporting structure, the second dowel bar is used as a main bar of the second anti-floating cantilever when the second anti-floating cantilever is constructed and anchored in the basement outer wall or the basement roof, and the second anti-floating cantilever and the basement roof are integrally cast into a whole; the second dowel bar is provided with a water-swelling rubber water stop ring at a position contacting with the outer wall of the basement or the outer edge of the top plate of the basement.
2. The anti-floating node according to claim 1, wherein the shear groove is filled with extruded sheets, wood boxes or square wood during construction of the supporting structure, and the outer part is fixedly connected with the main bars of the supporting structure through a reinforcing mesh.
3. The anti-floating node according to claim 1, wherein one end of the first dowel bar is inserted into the supporting structure through the shear groove, is bent in an L-shaped arrangement in the supporting structure and is welded and fixed with the main bar of the supporting structure, the other end of the first dowel bar is bent in the shear groove when the supporting structure is constructed, the main bar serving as the first anti-floating cantilever is straightened when the first anti-floating cantilever is constructed, or the other end of the first dowel bar is connected with a reinforcing bar connector and is embedded in the shear groove when the supporting structure is constructed, and the reinforcing bar connector is used for connecting the main bar of the first anti-floating cantilever when the first anti-floating cantilever is constructed.
4. The anti-floating node of claim 1, further comprising a connection node of the support structure to at least one intermediate floor, the connection node comprising:
The cantilever beam comprises a supporting structure, third dowel bars, third anti-floating cantilever beams and a middle layer floor slab, wherein the middle layer floor slab is overhanging for a certain length into a basement fertilizer groove, a shearing resistant groove is reserved on one side of the supporting structure facing the middle layer floor slab, one end of each third dowel bar is anchored in the supporting structure, the other end of each third dowel bar is embedded in the shearing resistant groove during construction of the supporting structure, the third anti-floating cantilever beams are used as main bars of the third anti-floating cantilever beams during construction, one end of each third anti-floating cantilever beam is integrally cast into a whole with the shearing resistant groove, the other end of each third anti-floating cantilever beam extends to the upper side of the overhanging length of the middle layer floor slab, and the lower surface of each third anti-floating cantilever beam is in close contact with the upper surface of the overhanging length of the middle layer floor slab.
5. The anti-floating node of claim 4, wherein an expansion agent is disposed in the third anti-floating cantilever beam, so that the third anti-floating cantilever beam is in close contact with the middle floor slab, and provides a small amount of prestress to realize active anti-floating.
6. The anti-floating node of claim 1, wherein the support structure is a support pile, and the shear groove is arc-shaped in cross section of the support pile.
7. The anti-floating node according to claim 6, wherein the pile top of the support pile is provided with a crown beam, one end of the second dowel bar is inserted into the crown beam, is bent in an L-shaped arrangement in the crown beam, and is welded and fixed with the main dowel bar of the support pile.
8. A construction process of an anti-floating node according to any one of claims 1 to 7, comprising the steps of:
Step one: constructing a supporting structure, reserving a shearing-resistant groove, embedding a first dowel bar, and embedding a second dowel bar;
step two: digging a foundation pit;
Step three: arranging a foundation slab;
Step four: digging a shearing groove, and straightening a first dowel bar bent in the shearing groove;
step five: binding a first shear stirrup;
step six: pouring first anti-floating cantilever concrete;
step seven: maintaining the integral structure;
Step eight: straightening the second dowel bar;
Step nine: arranging a water-swelling rubber water stop ring;
Step ten: binding a second shear stirrup;
step eleven: the second anti-floating cantilever beam and the basement roof are integrally poured with concrete;
step twelve: and maintaining the whole structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210681461.4A CN114960778B (en) | 2022-06-16 | 2022-06-16 | Basement anti-floating node based on supporting structure and construction process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210681461.4A CN114960778B (en) | 2022-06-16 | 2022-06-16 | Basement anti-floating node based on supporting structure and construction process thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114960778A CN114960778A (en) | 2022-08-30 |
| CN114960778B true CN114960778B (en) | 2024-05-28 |
Family
ID=82964212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210681461.4A Active CN114960778B (en) | 2022-06-16 | 2022-06-16 | Basement anti-floating node based on supporting structure and construction process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114960778B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104631677A (en) * | 2015-01-21 | 2015-05-20 | 广东省建筑工程集团有限公司 | Construction technology for hollow super-thick concrete terrace |
| CN107975043A (en) * | 2018-01-05 | 2018-05-01 | 沙焕焕 | Foundation pit supporting construction and underground structure, basic integrated structure |
| CN207686135U (en) * | 2017-12-28 | 2018-08-03 | 中铁第四勘察设计院集团有限公司 | Subway station Guan Liang reserved joint bar structure |
| CN110067250A (en) * | 2019-05-10 | 2019-07-30 | 中国建筑西南勘察设计研究院有限公司 | Anti-floating type foundation pit supporting construction and construction method |
| CN110273436A (en) * | 2019-05-05 | 2019-09-24 | 南京同力建设集团股份有限公司 | Open trench tunnel utilizes support pile and bear down on one float Structure and its construction method of crown beam |
| CN112900445A (en) * | 2021-01-15 | 2021-06-04 | 广西建工集团冶金建设有限公司 | Construction method of outer wall of underground reinforced concrete structure |
| CN217352519U (en) * | 2022-06-16 | 2022-09-02 | 中铁建工集团有限公司 | Basement anti-floating node based on supporting structure |
-
2022
- 2022-06-16 CN CN202210681461.4A patent/CN114960778B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104631677A (en) * | 2015-01-21 | 2015-05-20 | 广东省建筑工程集团有限公司 | Construction technology for hollow super-thick concrete terrace |
| CN207686135U (en) * | 2017-12-28 | 2018-08-03 | 中铁第四勘察设计院集团有限公司 | Subway station Guan Liang reserved joint bar structure |
| CN107975043A (en) * | 2018-01-05 | 2018-05-01 | 沙焕焕 | Foundation pit supporting construction and underground structure, basic integrated structure |
| CN110273436A (en) * | 2019-05-05 | 2019-09-24 | 南京同力建设集团股份有限公司 | Open trench tunnel utilizes support pile and bear down on one float Structure and its construction method of crown beam |
| CN110067250A (en) * | 2019-05-10 | 2019-07-30 | 中国建筑西南勘察设计研究院有限公司 | Anti-floating type foundation pit supporting construction and construction method |
| CN112900445A (en) * | 2021-01-15 | 2021-06-04 | 广西建工集团冶金建设有限公司 | Construction method of outer wall of underground reinforced concrete structure |
| CN217352519U (en) * | 2022-06-16 | 2022-09-02 | 中铁建工集团有限公司 | Basement anti-floating node based on supporting structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114960778A (en) | 2022-08-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110777806B (en) | Multi-connecting-rod plane frame permanent supporting structure and construction process thereof | |
| CN214614154U (en) | Assembled open caisson for building underground sewage tank | |
| CN217352519U (en) | Basement anti-floating node based on supporting structure | |
| CN212801564U (en) | Foundation ditch steel sheet pile supporting construction | |
| CA2673876A1 (en) | Shoring free excavation and basement construction apparatus and method | |
| CN113417300A (en) | Slope support system and construction method thereof | |
| CN114960778B (en) | Basement anti-floating node based on supporting structure and construction process thereof | |
| CN217710837U (en) | Anti-floating underground building | |
| CN216108602U (en) | Retaining wall supporting construction is administered in river surge | |
| CN214143789U (en) | Tower crane foundation on foundation pit slope | |
| CN111894036B (en) | Construction method for additionally arranging basement on strip-shaped foundation building | |
| CN209260748U (en) | A kind of stepped tower crane | |
| AU2008201576A1 (en) | A Retaining Wall for Erosion Protection | |
| CN218713287U (en) | Connecting structure of cast-in-place pile serving as reverse vertical supporting member and bottom plate | |
| CN217629945U (en) | Foundation pit supporting structure using existing building beam slab as support | |
| JP4749858B2 (en) | Method for enhancing bearing capacity in extension or reconstruction of superstructures of existing buildings | |
| CN218990240U (en) | Side mold system at deep pit of foundation slab | |
| CN213086808U (en) | Permanent support device for underground structure | |
| CN212656215U (en) | Assembled pipe support of cross prefabricated steel concrete pile and steel-pipe column combination | |
| CN221030287U (en) | Water conservancy construction pile foundation structure | |
| CN215860168U (en) | Ultra-deep shaft top plate | |
| CN220789834U (en) | Composite foundation structure of plate-type soil box of power transmission tower | |
| CN216787120U (en) | Underground chamber lateral wall supporting construction | |
| CN218454378U (en) | Retaining wall structure | |
| CN115387373A (en) | Construction method of near-water bearing platform |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |