CN105332380B - Strut changing structure and method for underground building - Google Patents
Strut changing structure and method for underground building Download PDFInfo
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- CN105332380B CN105332380B CN201510787080.4A CN201510787080A CN105332380B CN 105332380 B CN105332380 B CN 105332380B CN 201510787080 A CN201510787080 A CN 201510787080A CN 105332380 B CN105332380 B CN 105332380B
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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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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
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- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
The invention provides a strut changing structure and method for an underground building, relates to the technical field of underground building structure construction, and aims at solving the problems that the existing strut changing technology is not suitable for the underground building of which the inner space is short of a large area of horizontal floor slabs. The strut changing structure comprises temporary beam plates, rigid strut members, concrete boards and a filler layer, wherein the temporary beam plates are connected with original structure beam plates, the rigid strut members are connected between the temporary beam plates and support piles, the concrete boards are supported between an outer wall and the support piles, and the filler layer is arranged between the outer wall and the support piles. The strut changing method comprises the following steps: pouring concrete bottom plates, and pouring concrete boards 1 between the support piles and the concrete bottom plates; at the same time, pouring the original structure beam plates and the newly increased temporary beam plates on the current layer, pouring retaining walls, and refilling a filler to the standard height of the current layer of floor slabs; erecting the rigid strut members between the outer wall and the temporary beam plates; enabling the positions of concrete boards 2 to correspond to those of the adjacent rigid strut members, and removing concrete supports on the current layer; in this way, changing the strut members from bottom to top in a layer-by-layer manner; and removing the newly increased temporary beam plates and the rigid strut members.
Description
Technical field
The present invention relates to hypogee structure construction technology field, the support replacement knot of more particularly to a kind of deep basal pit hypogee
Structure and method.
Background technology
Described support replacement technology in deep-foundation pit engineering, its principle is to allow support pile to tear open because of provisional inner supporting structure system
Except produced part stress passes through stress Media Differentiation or passes to the third party for possessing enough ability to bears, that is, construct
The outer wall of basement and negative one floor plate-girder of suitable intensity are completed and reached, so as to ensure the normal support action of support pile, is made
Obtain engineering to proceed with guaranteeing the quality safely, its essence is the safe and orderly adjustment of stress, transfer and reallocate.
However, for some large space hypogees, such as large-scale garage, exhibition center etc., interior construction spacing are present
Large-area horizontal floor construction disappearance, it is impossible to play a part of horizontal support replacement power transmission.Therefore, how to design a kind of effective
Support changing structure for use and method, original inner supporting structure system remove after, outer wall of underground structure can be avoided excessive because of soil pressure
And disturbance is caused, and then ensure the stability of structure, it is the technical barrier that those skilled in the art face.
The content of the invention
For existing support replacement technology, it is impossible to there is the hypogee of the horizontal floor disappearance of large area suitable for inner space
The problem of support replacement construction, it is an object of the invention to provide the support changing structure for use and method of a kind of hypogee, by original structure
It is upper to increase beam slab and rigid strutting piece newly to reach the purpose of support replacement, it is ensured that the stability of underground structure.
The present invention solves a kind of support changing structure for use of hypogee adopted by its technical problem, including with the hypogee
Original structure beam slab connection interim beam slab；The some rigid strutting pieces being connected between the interim beam slab and support pile；
The some concrete slabs being supported between the exterior wall of the hypogee and the support pile；And it is arranged at the exterior wall and institute
State the packing layer between support pile.
Preferably, some concrete slabs are set gradually from the bottom to top, and the position with the adjacent rigid strutting piece
It is corresponding.
Preferably, reinforcement is also additionally arranged between the adjacent original structure beam slab, and the reinforcement with it is described
Original structure beam slab concreting is integrated.
Preferably, concreting of the concrete slab using strength grade more than or equal to C30 is formed.
Preferably, the rigid strutting piece is made up of section steel material.
Preferably, described filler layer by positioned at both sides retaining wall, and be filled in the retaining wall, exterior wall and support pile it
Between within the chamber filler constitute.
Preferably, described filler is made up of at least one in stone powder or fine sand.
In addition, present invention also offers a kind of support replacement method of hypogee, step is as follows：
First, the concrete floor of the hypogee is poured, and is poured between support pile and the concrete floor mixed
Concrete board one；
2nd, while pouring original structure beam slab in the underground structure current layer and increasing interim beam slab newly, described
Retaining wall is poured between the exterior wall and support pile of lower structure and filler is backfilled to the original structure beam slab absolute altitude；In the exterior wall
Some rigid strutting pieces are set up between interim beam slab with described increasing newly；In one top casting concrete plate two of concrete slab, institute is made
State concrete slab two corresponding with the position of the adjacent rigid strutting piece, then remove the concrete support in current layer；Such as
This successively realizes support replacement repeatedly, from bottom to top；
3rd, the newly-increased interim beam slab and rigid strutting piece are progressively removed from top to bottom, complete support replacement construction.
Preferably, in the step 2, waist rail or dark beam, the rigidity have also been poured in the force part of the exterior wall
Member supports are on the waist rail or dark beam of the exterior wall.
Effect of the invention is that：
First, horizontal floor construction is lacked for Large Underground Structure inner space, it is impossible to play horizontal support replacement intermal force
Problem, the present invention support changing structure for use set up using the structure vacancy between the original structure beam slab and exterior wall of hypogee
Interim beam slab, some rigid strutting pieces being connected between interim beam slab and support pile, and be arranged at exterior wall and support pile
Between some concrete slabs constitute a stress system, outer lateral earth pressure is transferred to into the original of hypogee by the stress system
There is structural beam slab, safe and reliable execution conditions are provided smoothly to tear support open, and, it also utilizes returns between exterior wall and support pile
Fill out packing layer and form force transmitting board band, outside soil stress is passed to by exterior wall by back-filling way；Therefore, the setting of the support changing structure for use
Outer lateral earth pressure can be transferred to into original structure beam slab effectively, after removing the inner support of hypogee, outside can be avoided
Soil pressure is excessive to cause disturbance to ramp exterior wall, so as to ensure that the stability in the large of hypogee.
2nd, the support replacement method of hypogee of the present invention, is poured between hypogee concrete floor and support pile first
Construction concrete slab one, carries out bottom supporting, then concrete slab two of successively constructing from bottom to top, concrete slab three and newly-increased interim
Beam slab, and rigid strutting piece is set up between interim beam slab and concrete slab so that concrete slab and adjacent rigid strutting piece
In same level, so as to outer lateral earth pressure is passed through concrete slab, exterior wall, rigid strutting piece and interim beam slab, and then
It is transferred on original structure beam slab, realizes effective transmission of soil pressure, so as to ensure the structural stability of hypogee, and,
With the successively pouring construction of beam slab, retaining wall of also successively constructing between exterior wall and support pile, and exterior wall and support pile it
Between backfill packing layer and form force transmitting board band, both serve the effect for transmit outer lateral earth pressure, further raising hypogee
Safety；The support replacement method good reliability, motility are strong, increase interim beam slab newly for hypogee construction and provide work surface, subtract
Lack resource one-time investment, shortened the construction period, while ensure that construction quality, increased economic benefit.
Description of the drawings
Partial top views of the Fig. 1 for the hypogee structure of one embodiment of the invention；
Partial sectional views of the Fig. 2 for the hypogee structure of one embodiment of the invention.
Specific embodiment
Below in conjunction with the drawings and specific embodiments to entering that the support changing structure for use and method of a kind of hypogee of the invention are proposed
One step is described in detail.According to description below and claims, advantages and features of the invention will become apparent from.Below will be by institute
The embodiment enumerated combines accompanying drawing, describes the technology contents and feature of the present invention in detail.Need to illustrate in addition, accompanying drawing is adopted
Very simplified form and non-accurately ratio is used, only to mesh that is convenient, lucidly aiding in illustrating the embodiment of the present invention
's.For sake of convenience, it is described below " on ", the upper and lower direction of D score and accompanying drawing it is consistent, but this can not become the present invention
The restriction of technical scheme.
Embodiment one：By taking the support replacement construction of certain Large Underground Parking Space 1 as an example, the engineering is ultra-deep foundation pit to the present embodiment, if
What meter plan was adopted goes along with sb. to guard him form for support pile+inner support, and support pile includes the bored concrete pile 2 near 1 exterior wall 1' of underground garage, and fills
The double cement mixing pile 3 for (referring to the side away from foundation ditch) on the outside of note stake 2, structure track is located at inner side of outer wall.With reference to Fig. 1
With the composition and structure of the support changing structure for use 10 that Fig. 2 illustrates the present embodiment hypogee, it includes and 1 original structure beam of underground garage
The interim beam slab 11 of the connection of plate 6, some rigid strutting pieces 16,17 being connected between interim beam slab 11 and support pile are supported in
Some concrete slab 15a, 15b, 15c between exterior wall 1' and support pile, and it is arranged at filling out between exterior wall 1' and support pile
Bed of material (not shown).Intend the diameter of bored concrete pile that adopts and spacing in the present embodiment for 1200@1500mm of Φ, length is
23m, 3 footpath 550mm of double cement mixing pile, pile spacing 400mm, pile length 9m.
Horizontal floor construction is lacked for 1 inner space of Large Underground Parking Space, it is impossible to play horizontal support replacement intermal force
Problem, the support changing structure for use of the present invention is using the structure vacancy between the original structure beam slab 6 of underground garage 1 and ramp exterior wall 1'
The interim beam slab 11 that place sets up, some rigid strutting pieces 16,17 being connected between interim beam slab 11 and support pile, and arrange
Some concrete slab 15a, 15b, 15c between exterior wall 1' and support pile constitute a stress system, and outer lateral earth pressure is passed through
The stress system is transferred to the original structure beam slab 6 of underground garage 1, provides safe and reliable execution conditions smoothly to tear support open, and
And, it also utilizes and packing layer formation force transmitting board band is backfilled between exterior wall 1' and support pile, should by outside soil by back-filling way
Power passes to exterior wall 1'；Therefore, outer lateral earth pressure effectively can be transferred to original structure beam by the setting of the support changing structure for use 10
Plate 6, after removing the inner support of underground garage 1, can avoid outer lateral earth pressure excessive and disturbance is caused to ramp exterior wall 1', so as to protect
The stability in the large of underground structure is demonstrate,proved.
Further, it is as shown in Fig. 2 some concrete slab 15a, 15b, 15c are set gradually from the bottom to top and firm with adjacent
Property support member 16,17 position it is corresponding, that is to say, that in Fig. 2, one 15a of concrete slab and basement bottom board are located at same level
On face, two 15b of concrete slab and first rigid strutting piece 16 are located in same level, three 15c of concrete slab and second
Rigid strutting piece 17 is located in same level, thus, by concrete slab 15a, 15b, 15c and rigid strutting piece 16,17 structures
Into multiple radial bang path so that the outer lateral earth pressure of foundation ditch successfully can be transferred on original structure beam slab 6.
Outer lateral earth pressure is transferred on the original structure beam slab 6 of underground garage 1 in view of support changing structure for use 10, increases original
The stress of contignation, therefore, it is the structural strength for improving former contignation, is also additionally arranged between adjacent original structure beam
Reinforcement 19, and reinforcement 19 is integrated with 6 concreting of original structure beam slab.
Preferably, above-mentioned concrete slab 15a, 15b, 15c adopt strength grade more than or equal to the concreting of C30
Into to ensure that concrete slab 15a, 15b, 15c have enough intensity, concrete of the present embodiment preferred intensity grade for C30
Pouring construction concrete slab 15a, 15b, 15c, and its thickness is more than or equal to 300mm.
Above-mentioned rigid strutting piece 16,17 is made up of section steel material, and the preferred 36b Two bors d's oeuveres I-steel of this enforcement is made, and b represents work
Word steel height, unit is cm.
More preferably, as shown in figure 1, above-mentioned packing layer is by the retaining wall 18 positioned at both sides, and it is filled in retaining wall 18, exterior wall
Between 1' and support pile, the filler of within the chamber is constituted.The present embodiment is using the gap between original exterior wall 1' and support pile, both sides
Closure retaining wall 18 forms overall filler force transmitting board band, not only easy construction, and improves as the chamber for accommodating filler
The safety of Stress Transfer.
Above-mentioned filler is stone powder or fine sand, the preferred stone powder of the present embodiment, because the retaining design of underground garage 1 might have less
Amount Groundwater infiltration, stone powder have preferable soaking effect, and stone powder good fluidity, denser after backfill, so as to enter
Step improves the safety of underground structure.
Embodiment two：The support replacement method of hypogee of the present invention is illustrated with reference to Fig. 1 and Fig. 2, still with certain Large Underground Parking Space 1
Support replacement construction as a example by, the underground garage 1 have F3/B3 structure, comprise the following steps that：
First, pour the concrete floor of underground garage 1, concrete bottom thickness of slab 800mm, base surface absolute altitude for-
15.600m, and one 15a of casting concrete plate between support pile and concrete floor；
2nd, 1 minus two layer of beam slab of underground garage is poured, now minus two layers newly-increased interim beam slab 11 and minus two layers of original structure beam
Plate 6 is poured simultaneously, pours retaining wall 18 and backfill filler to minus two floors plate mark between 1 exterior wall 1' of underground garage and support pile
It is high；And first rigid strutting piece 16 is set up between exterior wall 1' and minus two layers of newly-increased interim beam slab 11；Casting concrete plate two
15b, makes two 15b of concrete slab corresponding with the position of adjacent first rigid strutting piece 16, then removes first concrete
4 are supported, minus two layers of support replacement construction is realized；
Then, 1 negative one layer beam slab of underground garage is poured, now negative one layer increases interim beam slab 11 and negative one layer original structure newly
Beam slab 6 is poured simultaneously, continues to build retaining wall 18 by laying bricks or stones and backfill filler to negative one layer between 1 exterior wall 1' of underground garage and support pile
Floor absolute altitude；And erection second rigid strutting piece 17 between interim beam slab 11 is increased newly in exterior wall 1' and negative one layer；Pour coagulation
Three 15c of native plate, makes three 15c of concrete slab corresponding with the position of adjacent second rigid strutting piece 17, then removes second
Concrete support 5, realizes the support replacement construction of negative one layer；
3rd, it is last, newly-increased interim beam slab 11, rigid strutting piece 16,17 and vertical steel lattice column are successively removed from top to bottom,
Complete support replacement construction.
The support replacement method of hypogee of the present invention, pours between 1 concrete floor of underground garage and support pile first and applies
One 15a of work concrete slab, carries out bottom supporting, then successively construct from bottom to top two 15b of concrete slab, three 15c of concrete slab and
Newly-increased interim beam slab 11, and rigid strutting piece 16,17 is set up between interim beam slab 11 and concrete slab 15b, 15c so that it is mixed
Concrete board 15b, 15c are located in same level with adjacent rigid strutting piece 16,17, so as to outer lateral earth pressure is passed through coagulation
Native plate 15a, 15b, 15c, exterior wall 1', rigid strutting piece 16,17 and interim beam slab 11, and then be transferred on original structure beam slab 6,
Effective transmission of soil pressure is realized, so as to ensure the structural stability of underground garage 1, and, as successively pouring for beam slab is applied
Work, retaining wall 18 of also successively constructing between exterior wall 1' and support pile, and packing layer shape is backfilled between exterior wall 1' and support pile
Into force transmitting board band, the effect for transmitting outer lateral earth pressure is both served, the safety of underground structure is further improved；The support replacement side
Method good reliability, motility are strong, and newly-increased interim beam slab 11 provides work surface for Underground Construction, reduces resource disposable
Investment, shortens the construction period, while ensure that construction quality, increased economic benefit.
Also include in above-mentioned steps two, the dark beam 13 of force part also pouring construction on the inside of the exterior wall 1', and dark beam 13 with
Connect first rigid strutting piece 16 between newly-increased interim beam slab 11, the setting of dark beam 13 can strengthen exterior wall 1' force parts
Structural strength, it is to avoid exterior wall 1' is damaged under excessive pressure effect.Similar, it is to strengthen outside at negative one floor plate absolute altitude
The structural strength of wall 1' force parts, exterior wall 1' simultaneously dark beams 14 of pouring construction in this place, second rigid strutting piece 17 connect
Between newly-increased interim beam slab 11 and dark beam 14.
Foregoing description is only the description to present pre-ferred embodiments, not any restriction to the scope of the invention, this
Any change that the those of ordinary skill in bright field is done according to the disclosure above content, modification, belong to the protection of claims
Scope.
Claims (9)
1. a kind of support changing structure for use of hypogee, it is characterised in that include：
The interim beam slab being connected with the original structure beam slab of the hypogee；
The some rigid strutting pieces being connected between the interim beam slab and support pile；
The some concrete slabs being supported between the exterior wall of the hypogee and the support pile；
And the packing layer being arranged between the exterior wall and the support pile.
2. support changing structure for use according to claim 1, it is characterised in that：Some concrete slabs are set from the bottom to top successively
Put, and it is corresponding with the position of the adjacent rigid strutting piece.
3. support changing structure for use according to claim 1, it is characterised in that：Also increase between the adjacent original structure beam slab
If reinforcement, and the reinforcement is integrated with the original structure beam slab concreting.
4. support changing structure for use according to claim 1, it is characterised in that：The concrete slab is more than or equal to using strength grade
The concreting of C30 is formed.
5. support changing structure for use according to claim 1, it is characterised in that：The rigid strutting piece is made up of section steel material.
6. the support changing structure for use according to any one of claim 1 to 5, it is characterised in that：Described filler layer is by positioned at both sides
Retaining wall, and be filled in the retaining wall, between exterior wall and support pile within the chamber filler constitute.
7. support changing structure for use according to claim 6, it is characterised in that：Described filler is by least one in stone powder or fine sand
Composition.
8. a kind of support replacement method of hypogee, is tied using the support replacement of the hypogee as described in any one of claim 1 to 7
Structure, step are as follows：
First, the concrete floor of the hypogee, and the casting concrete between support pile and the concrete floor are poured
Plate one；
2nd, while pouring the original structure beam slab in the underground structure current layer and increasing interim beam slab newly, tie in the underground
Retaining wall is poured between the exterior wall and support pile of structure and filler is backfilled to the original structure beam slab absolute altitude；In the exterior wall and institute
State some rigid strutting pieces are set up between newly-increased interim beam slab；In one top casting concrete plate two of concrete slab, make described mixed
Concrete board two is corresponding with the position of the adjacent rigid strutting piece, then removes the concrete support in current layer；It is so anti-
It is multiple, support replacement is successively realized from bottom to top；
3rd, the newly-increased interim beam slab and rigid strutting piece are progressively removed from top to bottom, complete support replacement construction.
9. support replacement method according to claim 8, it is characterised in that：In the step 2, in the forced section of the exterior wall
Position has also poured waist rail or dark beam, and the rigid strutting piece is supported on the waist rail of the exterior wall or dark beam.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510787080.4A CN105332380B (en) | 2015-11-16 | 2015-11-16 | Strut changing structure and method for underground building |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510787080.4A CN105332380B (en) | 2015-11-16 | 2015-11-16 | Strut changing structure and method for underground building |
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| CN105332380B true CN105332380B (en) | 2017-04-12 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105735382A (en) * | 2016-03-11 | 2016-07-06 | 上海建工二建集团有限公司 | Temporary underpinning structure of existing structure foundation and construction method of temporary underpinning structure |
| CN107044126B (en) * | 2017-02-23 | 2023-06-09 | 中国建筑第八工程局有限公司 | Combined support changing system for foundation pit supporting structure |
| CN112240033A (en) * | 2019-07-18 | 2021-01-19 | 重庆建工第七建筑工程有限责任公司 | Construction method of unconventional reverse construction outer wall structure in high slope area |
| CN111519634B (en) * | 2020-04-30 | 2022-05-10 | 中国一冶集团有限公司 | Support removing and replacing construction method of temporary support replacing structure |
| CN112359839B (en) * | 2020-11-17 | 2021-10-15 | 中建八局科技建设有限公司 | Method for rapidly completing foundation pit earthwork and supporting flowing water construction by utilizing old diaphragm wall |
| CN112593560A (en) * | 2020-11-23 | 2021-04-02 | 上海建工二建集团有限公司 | Supporting beam replacing structure between supporting pile and basement outer wall and construction method thereof |
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| CN102444130A (en) * | 2011-10-20 | 2012-05-09 | 中建六局第三建筑工程有限公司 | Support replacing construction method in deep foundation pit project |
| KR20130085353A (en) * | 2012-01-19 | 2013-07-29 | 백인우 | Construction method for retaining wall and construction apparatus for thereof and retaining wall structure |
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