CN106703041B - A kind of transformational structure and conversion method of internal support of foundation pit supporting construction force path - Google Patents
A kind of transformational structure and conversion method of internal support of foundation pit supporting construction force path Download PDFInfo
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- CN106703041B CN106703041B CN201611237198.0A CN201611237198A CN106703041B CN 106703041 B CN106703041 B CN 106703041B CN 201611237198 A CN201611237198 A CN 201611237198A CN 106703041 B CN106703041 B CN 106703041B
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- angle brace
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- 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
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/20—Miscellaneous comprising details of connection between elements
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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
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- General Engineering & Computer Science (AREA)
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- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
The invention discloses the transformational structures and conversion method of a kind of internal support of foundation pit supporting construction force path, transformational structure includes set on the load transfering strip between main structure and support pile, it is connected between the first side and support pile of load transfering strip by the first shear connector, is connected between second side and main structure of load transfering strip by the second shear connector；First shear connector and the second shear connector form active earth pressure of the shearing with balanced action on the outside of support pile when the first angle brace of corresponding position or the second angle brace are removed, and make with the independent power transmission for synchronizing symmetrical the first angle brace of stress check calculation or the second angle brace for organizing inner support angle brace.When being related to needing premature removal with the single inner support organized in inner support, shear connector structure can be set on corresponding load transfering strip, pass through basement structure and shear connector again, it will act on active earth pressure on the outside of support pile, it converts to being parallel on the actively support pile in native soil pressure direction, it realizes the conversion of force transfer system, solves premature removal inner support technical problem.
Description
Technical field
The present invention relates to a kind of internal support of foundation pit supporting construction more particularly to a kind of internal support of foundation pit supporting construction power transmission ways
The transformational structure and conversion method of diameter.
Background technique
With the in short supply and technological innovation of urban land resource, underground space development increasingly obtains extensive concern and hair
Exhibition, continues to bring out out large quantities of ultra-deep underground space structures, deep-foundation pit engineering comes into being.Meanwhile because various regions are hydrogeological
Condition differs greatly, generally all can be using interior when there are the poor geological conditions such as sandy soil stratum, silly stratum, reclaimation area
Supporting construction is supported, to guarantee deep pit monitor；But inner support supporting construction is complex, the process being related to is more, it is long in time limit, change
Support a series of technical problems such as difficulty is big；It is often the case that the symmetrical fertilizer slot that carries out backfills, right at one layer of basement structure construction
After claiming construction load transfering strip, corresponding inner support can be removed, under the operating condition, basement structure construction break time is longer, can not
It works continuously, is affected to engineering construction tissue and duration.So, how to change existing process and construction stream by designing
Journey, premature removal inner support shorten basement structure break time, are of great significance for engineering construction person.
Summary of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of internal support of foundation pit branch
The transformational structure and conversion method of protection structure force path, to solve to mention with inner support single under the group symmetrical force status of inner support
Basement structure construction is inserted into preceding dismounting in advance, shortens break time, accelerates the technical problems such as engineering overall progress.
In order to realize the above technical effect, the invention discloses a kind of Change-over knots of internal support of foundation pit supporting construction force path
Structure, internal support of foundation pit supporting construction include the vertical more support piles arranged around foundation pit, are supported horizontally on the more of foundation pit corner
The inner support stand column pile of inner support angle brace described in group inner support angle brace and vertical supporting；The support pile is equipped with waist rail and passes through
The waist rail is connected with the inner support angle brace, and inner support angle brace described in every group includes being respectively supported at adjacent in foundation pit two
The first angle brace and the second angle brace of corner and symmetrical stress；
Main structure is equipped in foundation pit, the transformational structure includes being set between the main structure and the support pile
Load transfering strip is connected between the first side and the support pile of the load transfering strip by the first shear connector, and the second of the load transfering strip
It is connected between side and the main structure by the second shear connector；
First angle brace or second angle brace of first shear connector and second shear connector in corresponding position
Active earth pressure of the shearing with balanced action on the outside of the support pile is formed when dismounting, is made with the same of the group inner support angle brace
Walk the independent power transmission that symmetrical stress check calculation is first angle brace or second angle brace.
The transformational structure of the internal support of foundation pit supporting construction force path, which is further improved, to be, the support pile is
Interlocking pile, surface have cloud threadiness profile, and first shear connector is the first side of the load transfering strip and the knot of the interlocking pile
The concave-convex clutch structure formed at conjunction.
The transformational structure of the internal support of foundation pit supporting construction force path, which is further improved, to be, second shearing
Key includes continuously being set to the convex key teeth of the junction of second side and the main structure of the load transfering strip and being set to described
One end of shearing resistance muscle in convex key teeth, the shearing resistance muscle anchors into the main structure.
The transformational structure of the internal support of foundation pit supporting construction force path, which is further improved, to be, the convex key teeth
In rectangle, the shearing resistance muscle is U-shaped muscle, and the open end of the U-shaped muscle anchors into the main structure.
The transformational structure of the internal support of foundation pit supporting construction force path, which is further improved, to be, interior branch described in multiple groups
Support angle is supportted along the alternate arrangement of foundation pit short transverse.
The transformational structure of the internal support of foundation pit supporting construction force path, which is further improved, to be, first angle brace
And second angle brace respectively includes the multiple tracks angle supporting beam of alternate arrangement and is connected between angle supporting beam described in adjacent twice
Linking beam, multiple tracks angle supporting beam is supported in the same level height in foundation pit corner.
The invention also discloses a kind of conversion methods of internal support of foundation pit supporting construction force path, comprising steps of
Construction foundation pit inner support supporting construction, it is vertically horizontally-supported around more support piles of foundation pit, setting including arranging
The inner support stand column pile of the inner support angle brace described in the multiple groups inner support angle brace and setting vertical supporting in foundation pit corner；The supporting
Stake is equipped with waist rail and is connected by the waist rail with the inner support angle brace, and inner support angle brace described in every group includes installing respectively
The first angle brace and the second angle brace of two adjacent corners and symmetrical stress in foundation pit；
Corresponding to the position of first angle brace or second angle brace, in portion body structure of constructing in foundation pit；
It constructs load transfering strip between the main structure and the support pile of part construction, the first of Yu Suoshu load transfering strip
First shear connector is set between side and the support pile and is connected, second side of Yu Suoshu load transfering strip and the master of part construction
Second shear connector is set between body structure and is connected；
After the completion of the power transmission belt construction, first angle brace or second angle brace of corresponding position are removed；It utilizes
First shear connector and second shear connector form active earth pressure of the shearing with balanced action on the outside of the support pile,
Make with the independent power transmission for synchronizing symmetrical stress check calculation first angle brace or second angle brace for organizing the inner support angle brace；
Continue main structure of constructing.
The conversion method of the internal support of foundation pit supporting construction force path, which is further improved, to be, the load transfering strip exists
It constructs after the completion of fertile slot backfill, the fertilizer slot backfill, which is included between the main structure and foundation pit side, backfills the soil body, and backfill is high
Degree corresponds to the absolute altitude of second shear connector.
The conversion method of the internal support of foundation pit supporting construction force path, which is further improved, to be, in the foundation pit
After the completion of supporting support construction, in construction is located at the main body knot below first angle brace paragraph by paragraph from outside to inside in foundation pit
Structure；
Construct between the first segment main structure and the support pile of construction the load transfering strip, first shear connector and
Second shear connector；
After the completion of the power transmission belt construction, first angle brace is removed, first shear connector and described second is utilized
Shear connector forms active earth pressure of the shearing with balanced action on the outside of the support pile, makes with the same of the group inner support angle brace
Walk the independent power transmission that symmetrical stress check calculation is first angle brace；
The main structure for continuing to construct below first angle brace.
The conversion method of the internal support of foundation pit supporting construction force path, which is further improved, to be, first shearing
Key is snapped between the first side of the load transfering strip and the support pile and forms concave-convex clutch structure, and second shear connector is stung
Concave-convex clutch structure is formed between second side and the main structure together in the load transfering strip；The concave-convex clutch structure exists
Shearing is formed under the action of active earth pressure on the outside of the support pile, and by Shear transfer to the inside of the support pile.
The present invention due to use above technical scheme, make it have it is following the utility model has the advantages that
When needing one of angle brace of the premature removal with group inner support angle brace, it is arranged on load transfering strip by depending on
The interlocking of shear connector forms shearing, carrys out active earth pressure on the outside of balance supporting stake, under the operating condition can premature removal correspond to portion
Parallactic angle support, i.e., can premature removal with one of group inner support angle brace；
Shear connector depends on the setting of load transfering strip two sides, and support pile uses interlocking pile, and the shear connector in interlocking pile side utilizes
The cloud threadiness profile of interlocking pile self-assembling formation forms concave-convex clutch structure after power transmission belt construction with Transfer of Shear；Main structure
Using basement structure, basement structure side sets shearing resistance muscle with the multiple convex key teeths of structure setting are simultaneously interior, in power transmission belt construction
Afterwards, concave-convex clutch structure is formed with Transfer of Shear；
Load transfering strip makes it that can transmit the support reaction perpendicular to support pile direction and be parallel to because being equipped with shear connector
The shearing in support pile direction, thus active earth pressure on the outside of balance supporting stake well；
When using present invention construction, the whole duration of basement structure is accelerated, basement structure construction break time
Reduce significantly, solves internal support of foundation pit supporting construction and restrict basement construction technical problem.
Detailed description of the invention
Fig. 1 is the floor map of original internal support of foundation pit supporting construction.
Fig. 2 is the diagrammatic cross-section of original internal support of foundation pit supporting construction.
Fig. 3 is the stress system schematic diagram of original internal support of foundation pit supporting construction.
Fig. 4 is the floor map of basement structure, load transfering strip, support pile in original internal support of foundation pit supporting construction.
Fig. 5 is the original diagrammatic cross-section for tearing support operating condition open.
Fig. 6 is the original stress system schematic diagram for tearing support operating condition open.
Fig. 7 is that shear connector Change-over knot is arranged in a kind of transformational structure of internal support of foundation pit supporting construction force path of the present invention
The diagrammatic cross-section for tearing support operating condition open when structure.
Fig. 8 is that shear connector Change-over knot is arranged in a kind of transformational structure of internal support of foundation pit supporting construction force path of the present invention
Support stress system schematic diagram is torn open when structure.
Fig. 9 is the plane signal of shear connector in a kind of transformational structure of internal support of foundation pit supporting construction force path of the present invention
Figure.
Figure 10 is shear connector local structure schematic diagram of the invention.
Figure 11 is shear connector node diagrammatic cross-section of the invention.
Support operating condition and stress system schematic diagram are torn open in advance when Figure 12 is setting shear connector transformational structure of the invention.
Specific embodiment
Illustrate embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this specification
Other advantages and efficacy of the present invention can be easily understood for disclosed content.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also based on different viewpoints and application, without departing from
Various modifications or alterations are carried out under spirit of the invention.
The present invention provides the transformational structure and conversion method of a kind of internal support of foundation pit supporting construction force path, conventional bases
Hole inner support supporting construction is collectively constituted by interlocking pile or diaphram wall, inner support, stand column pile, inner support generally by angle brace or
Support is combined, stress is grouped, after the completion of basement structure, fertile slot backfill and all symmetrical load transfering strip, utilizes basement knot
Structure substitutes inner support stress, keeps the active earth pressure on the outside of foundation pit supporting pile equal with the support reaction that basement structure provides
Weighing apparatus, then corresponding inner support is removed, continue basement structure of constructing；The limitation of the operating condition is often have with group inner support pair
When claiming force status, one of inner support is unable to premature removal, influences basement structure and interts problem in advance.The present invention is proper
It is just to be made original symmetrical with group inner support by a kind of shear connector structure for converting internal support of foundation pit supporting construction force path
Force transfer system becomes single inner support independence force transfer system, and the single inner support of premature removal is inserted into basement structure construction in advance,
Solve the problems, such as that inner support restricts construction speed.
With reference to the accompanying drawing and specific embodiment is to the original biography of internal support of foundation pit supporting construction according to the present invention
The transformational structure and principle of power approach are described in further detail.
Referring to shown in Fig. 1~3, Fig. 1 is the floor map based on original internal support of foundation pit supporting construction, and Fig. 2 is involved
And original foundation pit supporting construction diagrammatic cross-section, Fig. 3 be related original internal support of foundation pit supporting construction beaer
It is schematic diagram.Foundation pit uses rectangle foundation pit, and Fig. 1 show the inner support supporting construction in adjacent two corner in the rectangle foundation pit, by
Support pile (1a and 1b), inner support angle brace (2a and 2b), inner support stand column pile (8a and 8b), waist rail (9a and 9b) collectively constitute base
The soil-baffling structure in hole, the soil body (10a and 10b) on the outside of supporting and retaining system support pile.Wherein, support pile 1a and support pile 1b is vertical respectively surround
Two adjacent corner arrangements in foundation pit, the foundation pit corner that inner support angle brace 2a is supported horizontally in two adjacent corners (are located at
The foundation pit corner of front position), another foundation pit corner that inner support angle brace 2b is then supported horizontally in two adjacent corners (is located at
The foundation pit corner of rear position), inner support angle brace 2a and inner support angle brace 2b constitute symmetrical stress system.Waist rail 9a is set to supporting
Between stake 1a and inner support angle brace 2a, waist rail 9a is parallel to the arranged direction of support pile 1a and arranges and continuous along its arranged direction
Extend, the more support pile 1a connection that will be located at the foundation pit corner (positioned at the foundation pit corner of front position) is integral, inner support
Angle brace 2a is connected by waist rail 9a with support pile 1a；Similarly, waist rail 9b is set between support pile 1b and inner support angle brace 2b, waist rail
9b is parallel to the arranged direction of support pile 1b and arranges and be extended continuously along its arranged direction, will be located at the foundation pit corner and (be located at
The foundation pit corner of rear position) more support pile 1b connection it is integral, inner support angle brace 2b passes through waist rail 9b and support pile 1b
It is connected.
Shown in Figure 4, Fig. 4 is the floor map that related original inner support angle brace removes operating condition.It is set in foundation pit
It sets basement structure (3a and 3b), basement structure (3a and 3b) is located between two corners adjacent in foundation pit.Basement
Structure 3a is located at the inside of support pile 1a, and basement structure 3b is located at the inside of support pile 1b, in basement structure 3a and supporting
The two is set to be connected by the way that concrete load transfering strip 4a is arranged between stake 1a, by setting between basement structure 3b and support pile 1b
It sets concrete load transfering strip 4b and the two is made to be connected.
Referring to figs. 5 and 6 shown in, Fig. 5 be it is original tear open support operating condition diagrammatic cross-section, Fig. 6 be it is original tear open support operating condition by
Power system schematic diagram.It completed when basement structure (3a and 3b) symmetrical construction, be symmetrical arranged load transfering strip (4a and 4b), utilizing biography
The support reaction (Fa and Fb) of symmetrical replacement inner support angle brace (2a and 2b) of the support reaction (fa and fb) of power band (4a and 4b), rear
Dismountable corresponding inner support angle brace (2a and 2b).For example, after the completion of basement structure (3a and 3b) whole symmetrical constructions, construction
Concrete load transfering strip (4a and 4b) can be removed pair after the concrete strength of concrete load transfering strip (4a and 4b) reaches 70%
The third road inner support angle brace answered.But under the operating condition, load transfering strip (4a and 4b) is only transmitted perpendicular to support pile (1a and 1b) side
To support reaction (fa and fb), one of inner support angle brace (2a and 2b) can not premature removal.
To sum up, the force transferring structure of original internal support of foundation pit supporting construction and principle are that the branch including inner support angle brace is anti-
Active earth pressure (Qa and Qb), load transfering strip support reaction (fa and fb) on the outside of power (Fa and Fb), support pile；Internal support of foundation pit supporting knot
The support reaction (Fa and Fb) that structure (2a and 2b) generates is formed symmetrical with active earth pressure (Qa and Qb) on the outside of support pile (1a and 1b)
Force transfer system；It, need to be by basement structure (3a and 3b), load transfering strip (4a and 4b) etc. as inner support angle brace to be removed (2a and 2b)
It is all symmetrical to complete, substitute inner support angle brace (2a and 2b) stress, i.e., it will be main on the outside of support pile using load transfering strip (4a and 4b)
Dynamic soil pressure (Qa and Qb) is transmitted on basement structure (3a and 3b), the symmetrical support reaction for replacing inner support angle brace (2a and 2b)
(Fa and Fb) can remove corresponding inner support angle brace (2a and 2b)；Load transfering strip (4a and 4b) is only transmitted perpendicular to branch under the operating condition
The support reaction (fa and fb) in fender pile direction, inner support angle brace (2a and 2b) can not premature removal.
With reference to the accompanying drawing and specific embodiment turns the force path of internal support of foundation pit supporting construction of the invention
It changes structure and transfer principle is described in further detail.
Shown in referring to figs. 7 and 8, Fig. 7 is a kind of transformational structure of internal support of foundation pit supporting construction force path of the present invention
The diagrammatic cross-section for tearing support operating condition open when middle setting shear connector transformational structure, Fig. 8 be it is of the invention tear support operating condition open tear support stress open
System schematic diagram.In the present invention, internal support of foundation pit supporting construction equally uses support pile (1a and 1b), inner support angle brace (2a
And 2b), inner support stand column pile (8a and 8b), waist rail (9a and 9b) collectively constitute the soil-baffling structure of foundation pit, foundation pit is still with rectangle base
For plinth, internal support of foundation pit supporting construction is similar to original foundation pit supporting construction shown in Fig. 1~3, specifically:
Support pile (1a and 1b) vertically surround two corner arrangements adjacent in foundation pit, and multiple groups inner support angle brace is supported horizontally on
Two adjacent foundation pit corner corners.Waist rail (9a and 9b) be set between support pile (1a and 1b) and inner support angle brace, waist rail (9a with
It 9b) is parallel to the arranged direction of support pile (1a and 1b) and arranges and be extended continuously along its arranged direction, by more support pile (1a
And 1b) link integrally, inner support angle brace is connected by waist rail (9a and 9b) with support pile (1a and 1b).Inner support angle brace is water
Square to arrangement, by inner support stand column pile (8a and 8b) vertical supporting, every group of inner support angle brace includes being respectively supported at foundation pit
In adjacent two corners and the first angle brace 2a of symmetrical stress and the second angle brace 2b, the first angle brace in every group of inner support angle brace
2a and the second angle brace 2b forms symmetrical stress system.Multiple groups inner support angle brace is along the alternate arrangement of foundation pit short transverse, the first angle brace
The company that 2a and the second angle brace 2b respectively include the multiple tracks angle supporting beam of alternate arrangement and be connected between the supporting beam of adjacent twice angle
Binder, multiple tracks angle supporting beam are supported in the same level height in foundation pit corner.
Wherein, support pile (1a and 1b) is interlocking pile form, is formed using the Concrete Grouting Pale of 1200mm diameter,
Occlusion overlapping range is 250mm, a dizzy element arrangement；Dizzy stake has arrangement of reinforcement, using concrete grade C45；Plain stake unreinforced uses
C15 ultra-retardation concrete.Inner support angle brace sets three groups (upper, middle and lower are respectively first, second and third group) altogether, is armored concrete knot
Structure；Inner support angle brace horizontal direction arrangement, passes through stand column pile (8a and 8b) vertical supporting；Every group of inner support angle brace is by the first angle brace
The independent angle brace composition of 2a and the second angle brace 2b two, positioned at same each other group of the first angle brace 2a and the second angle brace 2b of identical absolute altitude,
Symmetrical stress.First angle brace 2a and the second angle brace 2b is connect with support pile (1a and 1b) by waist rail (9a and 9b) respectively.
Main structure in the present invention uses basement structure, is arranged in foundation pit, which equally includes pair
Two parts 3a and 3b of title, " symmetrical " herein only indicate that basement structure 3a and basement structure 3b is located at phase in foundation pit
Two adjacent corners, the only relative symmetry on position, rather than it is full symmetric in traditional structure；Similarly, herein
In described " symmetrical stress " be also only opposite on Impact direction or on the contrary, the rather than direction of traditional power and big
It is full symmetric on small, structure or power mentioned herein should not be limited with " symmetrical " herein to be full symmetric.From Fig. 1
With in Fig. 2 it can also be seen that rectangle foundation pit herein is not regular rectangle or square, adjacent the two of the rectangle foundation pit
The size and shape in corner are also not identical.
Load transfering strip (4a and 4b) between basement structure (3a and 3b) and support pile (1a and 1b), load transfering strip (4a and 4b)
The first side and support pile (1a and 1b) between be connected by the first shear connector 5, second side of load transfering strip (4a and 4b) and underground
It is connected between cell structure (3a and 3b) by the second shear connector 6, to form shearing structure in the two sides of load transfering strip (4a and 4b).
First shear connector 5 and the second shear connector 6 are formed when the first angle brace 2a or the second angle brace 2b of corresponding position are removed to be sheared with flat
Weighing apparatus acts on the active earth pressure (Qa and Qb) on the outside of support pile, makes to convert with the symmetrical stress system that synchronizes for organizing inner support angle brace
For the independent force transfer system of the first angle brace 2a or the second angle brace 2b.When the single angle brace (first being related in same group inner support angle brace
Angle brace 2a or the second angle brace 2b) when needing premature removal, shear connector structure being arranged on the load transfering strip of corresponding position, (first cuts
Power key 5 and the second shear connector 6), then by basement structure and shear connector structure, will act on active earth pressure on the outside of support pile
(Qa and Qb) converts to the inside for the support pile for being parallel to support pile arranged direction, carrys out active earth pressure on the outside of balance supporting stake
(Qa and Qb), realizes the conversion of force transfer system, makes to be converted into single inner support independence power transmission with the group symmetrical stress system of inner support
System, the technical problem for solving premature removal inner support, being inserted into basement construction in advance.
It is shown in Figure 7, tearing open under support operating condition and operating condition when shear connector is set for load transfering strip of the invention, in the operating condition
Under, (the first angle brace 2a) independent in advance can be removed one of in same group inner support angle brace, be compared under original operating condition, when tearing support open
Between shifted to an earlier date, basement structure construction is shifted to an earlier date.It is shown in Figure 8, support is torn open when shear connector structure is set for load transfering strip
Stress system, Fa is as first, the support reaction of second inner support angle brace, and fa is as the first shear connector 5 and the second shear connector 6
The support reaction of formation, Fa, fa collective effect, active earth pressure Qa on the outside of balanced bite stake realize the conversion of stress system.
Referring to shown in Fig. 9~11, horizontal layout when shear connector is arranged for the load transfering strip in the present invention by Fig. 9, and Fig. 9 is shearing
Key local structure, Figure 11 are shear connector node sectional detail drawing.Load transfering strip 4a is set between support pile 1a and basement structure 3a,
It is constructed using C40 plain concrete；Its effect is that the active earth pressure Qa on the outside of support pile 1a is transmitted on basement structure 3a,
After replacing position the first angle brace 2a stress using basement structure 3a, the position the first angle brace 2a is removed, carries out remaining underground
The construction of cell structure 3a.To solve to tear open in advance with some angle brace (the first angle brace 2a or the second angle brace 2b) in group inner support angle brace
Except problem, below by taking the first angle brace of premature removal 2a as an example.In the side support pile 1a, using pile body nature shape, (pile body surface has
Have cloud threadiness profile) arc shear connector (the arc shear connector is the first shear connector 5) is formed, with Transfer of Shear；In basement
Multiple convex key teeths are continuously arranged in the outside of structure 3a, and built-in anti-shear muscle 7 in convex key teeth, one end of shearing resistance muscle 7 anchors into underground
In cell structure 3a；After load transfering strip 4a construction, second side and basement of the convex key teeth and the shearing resistance muscle 7 composition load transfering strip 4a
The second shear connector 6 between structure 3a.In the present embodiment, the second shear connector 6 is rectangle shear connector, width 300mm, thickness
400mm, length 250mm, interior to match U-shaped 6C16 shearing resistance muscle 7, the open end of shearing resistance muscle 7 anchors into basement structure 3a, anchors into length about
For 35d (35 times of shearing resistance muscle diameters).
Load transfering strip 4a constructs after the completion of fertile slot backfill, and the fertilizer slot backfill is between basement structure and foundation pit side
The soil body is backfilled, backfill height corresponds to the absolute altitude of the second shear connector 6.Concrete strength to load transfering strip 4a reaches design requirement
When (about 70%), corresponding first angle brace 2a can be removed, at this time without removing the second angle brace 2b with group.
Shown in Figure 12, Figure 12 is the operating condition signal of the first angle brace 2a premature removal of inner support angle brace in the present invention
Figure.In the ban when construction basement structure 3a, the first shear connector and second is respectively set in the two sides of the load transfering strip 4a of this corresponding section
Shear connector, the C40 concrete strength to load transfering strip 4a reach 70%, remove the first angle brace 2a, continue basement knot of constructing later
Structure 3a realizes that segmentation is inserted into advance, shortens intermittent cyclical, accelerates engineering integral construction progress.Similarly, in the ban construct basement knot
When structure 3b, the first shear connector and the second shear connector is respectively set in the two sides of the load transfering strip 4b of this corresponding section, to load transfering strip 4b's
C40 concrete strength reaches 70%, removes the second angle brace 2b, continues the basement structure 3b that constructs later, realizes that segmentation is inserted in advance
Enter, shorten intermittent cyclical, accelerates engineering integral construction progress.
To sum up, the force transferring structure of internal support of foundation pit supporting construction of the present invention and principle are, the branch including inner support angle brace
Active earth pressure (Qa and Qb), load transfering strip support reaction (fa and fb), shear connector shear (Va on the outside of counter-force (Fa and Fb), support pile
And Vb)；The support reaction (Fa and Fb) that internal support of foundation pit supporting construction (2a and 2b) generates, with active on the outside of support pile (1a and 1b)
Soil pressure (Qa and Qb) forms symmetrical force transfer system；When need premature removal with group inner support angle brace in an inner support 2a
When (or 2b), formed by the interlocking of the first shear connector 5 and the second shear connector 6 that depend on load transfering strip 4a (or 4b) setting
Shear V a (or Vb) carrys out active earth pressure Qa (or Qb) on the outside of balance supporting stake, under the operating condition, can premature removal it is corresponding in
It supports 2a (or 2b).
Wherein, shear connector structure depends on the setting of the load transfering strip two sides (4a and 4b), and the including support pile side is arranged in
One shear connector 5, the second shear connector 6 that basement structure side is set.Using the cloud threadiness profile of interlocking pile self-assembling formation,
After load transfering strip (4a and 4b) construction, concave-convex clutch structure Transfer of Shear is formed；It is simultaneously interior using basement structure setting convex key teeth
If shearing resistance muscle, after load transfering strip (4a and 4b) construction, concave-convex clutch structure Transfer of Shear is formed.When load transfering strip does not set the first shearing
When key 5 and the second shear connector 6, the support reaction (fa and fb) perpendicular to support pile is only transmitted；And when the first shearing of load transfering strip setting
When key 5 and the second shear connector 6, it can transmit and be parallel to perpendicular to the support reaction (fa and fb) in support pile direction and transmitting
The shearing (Va and Vb) of support pile arranged direction, making same group inner support angle brace, (2a is with 2b) by synchronous symmetrical force transfer system, conversion
For one of inner support independence force transfer system.
Below for using in a kind of transformational structure of internal support of foundation pit supporting construction force path of the invention progress foundation pit
It the step of support conversion construction, specifically includes that
S001: construction foundation pit inner support supporting construction, it is vertically horizontal around more support piles of foundation pit, setting including arranging
It is supported in the multiple groups inner support angle brace in foundation pit corner and the inner support stand column pile of vertical supporting inner support angle brace is set；On support pile
Be connected equipped with waist rail and by waist rail with inner support angle brace, every group of inner support angle brace includes being propped up adjacent two in foundation pit respectively
The first angle brace and the second angle brace of a corner and symmetrical stress；
S002: corresponding to the position of the first angle brace or the second angle brace, in portion body structure of constructing in foundation pit；
S003: load transfering strip of constructing between the main structure and support pile of part construction, the first side and branch in load transfering strip
First shear connector is set between fender pile and is connected, is arranged second between second side of load transfering strip and the main structure of part construction
Shear connector is simultaneously connected；
S004: after the completion of power transmission belt construction, the first angle brace or the second angle brace of corresponding position are removed；Utilize the first shearing
Key and the second shear connector form active earth pressure of the shearing with balanced action on the outside of support pile, make with the same of group inner support angle brace
Walk the independent power transmission that symmetrical stress check calculation is the first angle brace or the second angle brace；
S005: continue main structure of constructing.
Using the transformational structure and conversion method of a kind of internal support of foundation pit supporting construction force path of the invention, have with
It is lower the utility model has the advantages that
When needing one of angle brace of the premature removal with group inner support angle brace, it is arranged on load transfering strip by depending on
The interlocking of shear connector forms shearing, carrys out active earth pressure on the outside of balance supporting stake, under the operating condition can premature removal correspond to portion
Parallactic angle support, i.e., can premature removal with one of group inner support angle brace；
Shear connector depends on the setting of load transfering strip two sides, and support pile uses interlocking pile, and the shear connector in interlocking pile side utilizes
The cloud threadiness profile of interlocking pile self-assembling formation forms concave-convex clutch structure after power transmission belt construction with Transfer of Shear；Main structure
Using basement structure, basement structure side sets shearing resistance muscle with the multiple convex key teeths of structure setting are simultaneously interior, in power transmission belt construction
Afterwards, concave-convex clutch structure is formed with Transfer of Shear；
Load transfering strip makes it that can transmit the support reaction perpendicular to support pile direction and be parallel to because being equipped with shear connector
The shearing in support pile direction, thus active earth pressure on the outside of balance supporting stake well；
When using present invention construction, the whole duration of basement structure is accelerated, basement structure construction break time
Reduce significantly, solves internal support of foundation pit supporting construction and restrict basement construction technical problem.
It should be noted that this specification structure depicted in this specification institute accompanying drawings, ratio, size etc., only to cooperate
The bright revealed content of book is not intended to limit the invention enforceable limit so that those skilled in the art understands and reads
Fixed condition, therefore do not have technical essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size, not
It influences still fall in disclosed technology contents under the effect of present invention can be generated and the purpose that can reach and obtain
In the range of capable of covering.Meanwhile it is cited such as "upper", "lower", "left", "right", " centre " and " one " in this specification
Term is merely convenient to being illustrated for narration, rather than to limit the scope of the invention, the change of relativeness or tune
It is whole, under the content of no substantial changes in technology, when being also considered as the enforceable scope of the present invention.
The above is only presently preferred embodiments of the present invention, not does limitation in any form to the present invention, though
So the present invention has been disclosed as a preferred embodiment, and however, it is not intended to limit the invention, any technology people for being familiar with this profession
Member, in the range of not departing from technical solution of the present invention, when the technology contents using the disclosure above make a little change or repair
Decorations are the equivalent embodiment of equivalent variations, but anything that does not depart from the technical scheme of the invention content, technology according to the present invention are real
Matter any simple modification, equivalent change and modification to the above embodiments, still fall within the range of technical solution of the present invention
It is interior.
Claims (10)
1. a kind of transformational structure of internal support of foundation pit supporting construction force path, it is characterised in that: internal support of foundation pit supporting construction
Including vertically surrounding more support piles of foundation pit arrangement, being supported horizontally on the multiple groups inner support angle brace and vertical supporting in foundation pit corner
The inner support stand column pile of the inner support angle brace；The support pile is equipped with waist rail and passes through the waist rail and the inner support angle
Support is connected, and inner support angle brace described in every group includes first jiao for being respectively supported at two corners adjacent in foundation pit and symmetrical stress
Support and the second angle brace；
Main structure is equipped in foundation pit, the transformational structure includes set on the power transmission between the main structure and the support pile
Band is connected between the first side and the support pile of the load transfering strip by the first shear connector, second side of the load transfering strip with
It is connected between the main structure by the second shear connector；
First shear connector and second shear connector are removed in first angle brace of corresponding position or second angle brace
When form active earth pressure of the shearing with balanced action on the outside of the support pile, make with organizing synchronizing pair for the inner support angle brace
Stress check calculation is referred to as the independent power transmission of first angle brace or second angle brace.
2. the transformational structure of internal support of foundation pit supporting construction force path as described in claim 1, it is characterised in that: the branch
Fender pile is interlocking pile, and surface has cloud threadiness profile, and first shear connector is that the first side of the load transfering strip is engaged with described
The concave-convex clutch structure that the junction of stake is formed.
3. the transformational structure of internal support of foundation pit supporting construction force path as described in claim 1, it is characterised in that: described
Two shear connectors include continuously being set to second side of the load transfering strip and the convex key teeth of the junction of the main structure and setting
One end of shearing resistance muscle in the convex key teeth, the shearing resistance muscle anchors into the main structure.
4. the transformational structure of internal support of foundation pit supporting construction force path as claimed in claim 3, it is characterised in that: described convex
Shape key teeth is in rectangle, and the shearing resistance muscle is U-shaped muscle, and the open end of the U-shaped muscle anchors into the main structure.
5. the transformational structure of internal support of foundation pit supporting construction force path as described in claim 1, it is characterised in that: multiple groups institute
Inner support angle brace is stated along the alternate arrangement of foundation pit short transverse.
6. the transformational structure of internal support of foundation pit supporting construction force path as described in claim 1, it is characterised in that: described
One angle brace and second angle brace respectively include the multiple tracks angle supporting beam of alternate arrangement and are connected to the support of angle described in adjacent twice
Linking beam between beam, multiple tracks angle supporting beam are supported in the same level height in foundation pit corner.
7. a kind of conversion method of internal support of foundation pit supporting construction force path, which is characterized in that comprising steps of
Construction foundation pit inner support supporting construction is vertically supported horizontally on base around more support piles of foundation pit, setting including arranging
Cheat the inner support stand column pile of inner support angle brace described in the multiple groups inner support angle brace and setting vertical supporting in corner；On the support pile
It is connected equipped with waist rail and by the waist rail with the inner support angle brace, inner support angle brace described in every group includes propping up to be set to base respectively
The first angle brace and the second angle brace of two adjacent corners and symmetrical stress in hole；
Corresponding to the position of first angle brace or second angle brace, in portion body structure of constructing in foundation pit；
Construct load transfering strip between the main structure and the support pile of part construction, the first side of Yu Suoshu load transfering strip with
First shear connector is set between the support pile and is connected, second side of Yu Suoshu load transfering strip and the main body knot of part construction
Second shear connector is set between structure and is connected；
After the completion of the power transmission belt construction, first angle brace or second angle brace of corresponding position are removed；Using described
First shear connector and second shear connector form active earth pressure of the shearing with balanced action on the outside of the support pile, make same
The group inner support angle brace synchronizes the independent power transmission that symmetrical stress check calculation is first angle brace or second angle brace；
Continue main structure of constructing.
8. the conversion method of internal support of foundation pit supporting construction force path as claimed in claim 7, it is characterised in that: the biography
Power band is constructed after the completion of fertile slot backfills, and the fertilizer slot backfill, which is included between the main structure and foundation pit side, backfills the soil body,
Backfill height corresponds to the absolute altitude of second shear connector.
9. the conversion method of internal support of foundation pit supporting construction force path as claimed in claim 7, it is characterised in that: described
After the completion of internal support of foundation pit support construction, in construction is located at the master below first angle brace paragraph by paragraph from outside to inside in foundation pit
Body structure；
It constructs between the first segment main structure and the support pile of construction the load transfering strip, first shear connector and described
Second shear connector；
After the completion of the power transmission belt construction, first angle brace is removed, utilizes first shear connector and second shearing
Key forms active earth pressure of the shearing with balanced action on the outside of the support pile, makes with organizing synchronizing pair for the inner support angle brace
Stress check calculation is referred to as the independent power transmission of first angle brace；
The main structure for continuing to construct below first angle brace.
10. the conversion method of internal support of foundation pit supporting construction force path as claimed in claim 7, it is characterised in that: described
First shear connector is snapped between the first side of the load transfering strip and the support pile and forms concave-convex clutch structure, and described second
Shear connector is snapped between second side of the load transfering strip and the main structure and forms concave-convex clutch structure；The bumps are stung
Form shearing under the action of closing active earth pressure of the structure on the outside of the support pile, and by Shear transfer to the support pile
Inside.
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| CN201611237198.0A CN106703041B (en) | 2016-12-28 | 2016-12-28 | A kind of transformational structure and conversion method of internal support of foundation pit supporting construction force path |
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| CN112012218B (en) * | 2020-07-17 | 2021-05-25 | 广州市设计院 | Main supporting and connecting method at waist beam |
| CN113279412A (en) * | 2021-06-22 | 2021-08-20 | 北京城建集团有限责任公司 | Deep foundation pit supporting system based on serious quality defect of diaphragm wall and construction method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101117800A (en) * | 2007-08-22 | 2008-02-06 | 浙江大学 | Method for one-pile-three-use in underground engineering |
| KR20110052360A (en) * | 2009-11-12 | 2011-05-18 | 장성재 | Downward construction method of underground structure that enables continuous basement wall using non-wale and diaphragm action of concrete slab |
| CN103603360A (en) * | 2013-11-27 | 2014-02-26 | 上海建工七建集团有限公司 | Foundation pit enveloping method |
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2016
- 2016-12-28 CN CN201611237198.0A patent/CN106703041B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101117800A (en) * | 2007-08-22 | 2008-02-06 | 浙江大学 | Method for one-pile-three-use in underground engineering |
| KR20110052360A (en) * | 2009-11-12 | 2011-05-18 | 장성재 | Downward construction method of underground structure that enables continuous basement wall using non-wale and diaphragm action of concrete slab |
| CN103603360A (en) * | 2013-11-27 | 2014-02-26 | 上海建工七建集团有限公司 | Foundation pit enveloping method |
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| CN106703041A (en) | 2017-05-24 |
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