CN109667273A - A kind of construction method of deep foundation pit supporting structure - Google Patents
A kind of construction method of deep foundation pit supporting structure Download PDFInfo
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- CN109667273A CN109667273A CN201811575595.8A CN201811575595A CN109667273A CN 109667273 A CN109667273 A CN 109667273A CN 201811575595 A CN201811575595 A CN 201811575595A CN 109667273 A CN109667273 A CN 109667273A
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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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Abstract
The present invention relates to multiple material handling method of deep foundation pit fields to provide a kind of construction method of deep foundation pit supporting structure aiming at the problem that supporting construction of deep basal pit is easy to influence the construction of deep basal pit, comprising the following steps: the coupling beam of S1, construction double-row pile and double-row pile；S2, the soil body is excavated to preliminarily form deep basal pit；S3, support pier construction；S4, embedded groove construction；S5, diagonal brace construction；S6, remaining soils are removed.By installation diagonal brace to support preceding campshed, be conducive to the lateral rigidity of campshed before expanding, so that preceding campshed is not easy to topple in the construction process, simultaneously, be conducive to expansion deep basal pit utilizes space, convenient for constructing operation of the construction personnel in deep basal pit, is conducive to improve construction efficiency, in addition, compared to multiple-layer horizontal bracing members, diagonal brace only needs once to construct and can be installed, easy for construction, also helping reduces construction cost and production cost, so that economic benefit improves.
Description
Technical field
The present invention relates to multiple material handling method of deep foundation pit fields, more specifically, it relates to which a kind of deep foundation pit supporting structure is applied
Work method.
Background technique
Though deep basal pit refers to that cutting depth is more than 5 meters or depth is less than 5 meters, geological conditions and ambient enviroment and ground
The especially complex engineering of underground pipelines.In order to guarantee the safety of underground construction and foundation pit surrounding environment, it usually needs in deep basal pit side
Wall and surrounding enviroment establish supporting construction.
In order to improve supporting construction to the support force of deep basal pit, existing deep foundation pit supporting structure generallys use double-row pile branch
Protection structure, Retaining Structure with Double-row Piles are usually to be connected into along what foundation pit side-wall was arranged by forward and backward two rows of support piles and beam
The supporting structure of steelframe and crown beam composition.But when the depth of deep basal pit reaches 20 meters or so, deep-foundation side wall is in soil weight
It is easier to topple over towards double-row pile under the action of power, while the increase of foundation depth is so that the stress point and double-row pile of double-row pile exist
The distance of the fixed point of bottom of foundation ditch increases, so that double-row pile is easier to topple over.In order to enhance the stability of double-row pile,
In the deep basal pit that depth reaches 20 meters or so, the prior art generallys use multiple-layer horizontal bracing members to the double of deep basal pit two sides
Stake is supported, to improve the stability of double-row pile and enhance double-row pile to the support force of deep-foundation side wall.But it is horizontal
The horizontal centre in deep basal pit of bracing members, so that the space in deep basal pit is occupied, so that Horizontal steelwork bracing is easy to interfere to apply
The operation of worker person causes construction personnel to be difficult to carry out constructing operation in foundation pit, therefore, still there is improved space.
Summary of the invention
In view of the deficiencies of the prior art, the present invention intends to provide a kind of construction party of deep foundation pit supporting structure
Method has the advantages that convenient for construction, is not easy to influence constructing operation.
To achieve the above object, the present invention provides the following technical scheme that
A kind of construction method of deep foundation pit supporting structure, comprising the following steps:
The coupling beam of S1, construction double-row pile and double-row pile, the double-row pile includes preceding campshed and rear campshed；
S2, excavate the soil body to preliminarily form deep basal pit, while excavating the soil body on deep-foundation side wall the reserved part soil body with
Reserved slight slope is formed, the distance between top and deep basal pit bottom of the reserved slight slope are not less than the 1/2 of deep basal pit height；
S3, support pier construction, on the preceding campshed and the construction supporting pier of deep basal pit bottom, the branch being placed on the preceding campshed
Support the distance between pier and deep basal pit bottom are not less than deep basal pit height 1/2；
S4, embedded groove construction, excavate on the reserved slight slope and are implanted into reserved slight slope for diagonal brace to be fixed on support pier
Embedded groove, the both ends of the embedded groove support pier face on preceding campshed and deep basal pit bottom respectively；
S5, diagonal brace construction, wherein one end of diagonal brace are fixed with prestressing force head, diagonal brace are hung in embedded groove, answered in advance by starting
Power head pushes against the both ends of diagonal brace with support pier respectively；
S6, remaining soils are removed.
By adopting the above technical scheme, the lateral rigidity of campshed before expanding is conducive to support preceding campshed by installation diagonal brace,
So that preceding campshed is not easy to topple in the construction process, meanwhile, diagonal brace only needs to be arranged in the position equipped with preceding campshed, is conducive to
Expand deep basal pit utilizes space, so that diagonal brace is not easy to stop construction of the construction personnel in deep basal pit, is convenient for construction personnel
Constructing operation in deep basal pit is conducive to improve construction efficiency, in addition, comparing multiple-layer horizontal bracing members, diagonal brace is only needed once
Construction can be installed, easy for construction without the construction supporting structure in deep pit excavation, also help reduction construction cost
And production cost, so that economic benefit improves；By double-row pile and the coupling beam of first constructing, so that the side wall of deep basal pit was excavating
Cheng Zhongke is supported deep-foundation side wall by double-row pile, so that deep basal pit is not easy to collapse in digging process；By pre-
It stays slight slope to be supported double-row pile, is conducive to the stability for improving double-row pile, so that double-row pile is not easy in digging process
Collapse because of the gravity of the soil by rear campshed side, is conducive to the safety for improving construction；By the top for reserving slight slope
The distance between deep basal pit bottom is not less than the 1/2 of deep basal pit height, so that the tip height of reserved slight slope is more than preceding campshed
Position of centre of gravity height so that reserved slight slope can play the supporting role to preceding campshed, so that preceding campshed is in deep basal pit
Digging process in be not easy to collapse；By excavating embedded groove on reserved slight slope to install diagonal brace, diagonal brace is after the installation is completed again
The construction method of reserved slight slope is removed, keeps the support to preceding campshed to make convenient for being conducive to reserved slight slope while diagonal brace installation
With so that preceding campshed is not easy the support force decline because reserving slight slope in the installation process of diagonal brace due to collapses；By oblique
Wherein one end of support is fixed with the setting of prestressing force head, so that diagonal brace length after being placed in embedded groove is extending to push against both ends
Support pier, while being conducive to enhance the support strength of diagonal brace, so that diagonal brace enhances the support force of preceding campshed, so that preceding campshed is not
It is easy to collapse.
The present invention is further arranged to: in the step S2, between the top and deep basal pit bottom of the reserved slight slope
Distance is the 1/2-2/3 of deep basal pit height.
It by adopting the above technical scheme, is deep basal pit height by the distance between top and the deep basal pit bottom of reserving slight slope
1/2-2/3, be conducive to improve reserved slight slope in supporting role of the work progress to double-row pile of supporting construction, reduce reserved soil
Slope is insufficient to the support force of double-row pile and the case where cause double-row pile to collapse.
The present invention is further arranged to: in the step S3, the support pier being placed on the preceding campshed is disposed adjacent to reserve
The position on slight slope top.
By adopting the above technical scheme, the position on reserved slight slope top is disposed adjacent to by the support pier of campshed before being placed in, just
In the construction of support pier, so that the work progress of support pier can excavate reserved slight slope as few as possible, while convenient for embedded groove
Construction, so that the work progress of embedded groove also excavates reserved slight slope as few as possible, to advantageously reduce to reserved slight slope
Support degree impacts, so that double-row pile is not easy to collapse in the construction process；In addition, the fixed point of diagonal brace and preceding campshed is got over
Close to the top of preceding campshed, is more conducive to diagonal brace and plays a supportive role to preceding campshed.
The present invention is further arranged to: in the step S2, the cross section of the reserved slight slope is trapezoidal, the reserved soil
The small bottom end in the top on slope is big.
By adopting the above technical scheme, trapezoidal by reserving the cross section of slight slope, and the small bottom end in top of reserved slight slope is big,
Be conducive to enhance supporting role of the reserved slight slope to double-row pile, so that double-row pile is not easy down in the digging process of deep basal pit
It collapses, is conducive to the stability for improving deep-foundation side wall, so that the safety is improved for construction.
The present invention is further arranged to: in the step S2, the reserved slight slope includes the first slight slope and the second slight slope,
The trapezoidal shape in the cross section of first slight slope and the second slight slope, first slight slope and the equal top handle of the second slight slope
End is big, and first slight slope is placed in the top of the second slight slope, and the top of second slight slope is bigger than the bottom end of the first slight slope.
By adopting the above technical scheme, include the first slight slope and the second slight slope by reserved slight slope so that reserved slight slope with
The side area of the contact of deep basal pit bottom increases, to be conducive to enhance the stability of reserved slight slope, so that reserved slight slope is not
It is easy to appear landslide phenomenon, to be conducive to enhance supporting role of the reserved slight slope to preceding campshed, so that preceding campshed is in deep basal pit
Digging process in be not easy to collapse, be conducive to improve construction safety.
The present invention is further arranged to: the support pier includes the first buttress and the second buttress, first buttress pair
The first slight slope is answered to be arranged, the corresponding second slight slope setting of second buttress, the corresponding two groups of support piers of the diagonal brace are equipped with two.
By adopting the above technical scheme, it is correspondingly provided with by corresponding first slight slope of support pier and diagonal brace and the second slight slope
Two groups, be conducive to improve supporting role of the diagonal brace to preceding campshed, so that preceding campshed was being constructed after reserved slight slope is removed
It is not easy to collapse in journey.
The present invention is further arranged to: in the step S3, the first buttress of constructing in the step S4, is constructed first
Embedded groove on corresponding first slight slope of pier, in the step S5, the corresponding diagonal brace of the first buttress of construction；In the step S6,
The first slight slope is removed, after the step S6, is followed the steps below:
S7, the second buttress construction, on the preceding campshed and deep basal pit bottom construct the second buttress；
S8, embedded groove construction, excavate on second slight slope and are implanted into the second slight slope for diagonal brace to be fixed on the second buttress
Embedded groove, the both ends of embedded groove the second buttress face on preceding campshed and deep basal pit bottom respectively；
S9, diagonal brace construction, wherein one end of diagonal brace are fixed with prestressing force head, diagonal brace are hung in embedded groove, answered in advance by starting
Power head pushes against the both ends of diagonal brace with the second buttress respectively；
S10, the second slight slope is removed.
By adopting the above technical scheme, by first installing corresponding first buttress of the first slight slope and diagonal brace, and it is native by first
After slope is removed, then corresponding second buttress of the second slight slope and diagonal brace are installed, so that the first slight slope is not easy to influence the second soil
The installation of corresponding second buttress in slope and diagonal brace is reduced and is needed when installing corresponding second buttress of the second slight slope and diagonal brace
It is a large amount of to excavate the case where the first slight slope is to form embedded groove, to be conducive to improve construction efficiency；Meanwhile it is reserved to be conducive to enhancing
Supporting role of the slight slope to preceding campshed, so that the second slight slope can when installing corresponding first buttress of the first slight slope and diagonal brace
It plays a supportive role to preceding campshed, when installing corresponding second buttress of the second slight slope and diagonal brace, mounted first slight slope pair
The diagonal brace answered can play a supportive role, so that preceding campshed is not in the installation process of the first buttress, the second buttress and diagonal brace
It is easy to collapse；In addition, being convenient for the excavation of embedded groove, the too deep two sides for leading to embedded groove of cutting depth for reducing embedded groove are easy to collapse
The case where collapsing.
The present invention is further arranged to: in the step S3, before first buttress of constructing, first in the deep basal pit
Bottom is laid with raft foundation, and support pier is fixed on raft foundation.
By adopting the above technical scheme, by being first laid with raft foundation in bottom of foundation ditch, favorably before the first buttress of constructing
In the stability of enhancing support pier, so that support pier is less likely to occur to shake, and then is conducive to improve the stability of diagonal brace, so that
Diagonal brace is more preferable to the support effect of preceding campshed.
The present invention is further arranged to: the groove for diagonal brace insertion is provided on the support pier.
By adopting the above technical scheme, by being provided with the groove for diagonal brace insertion on support pier, be conducive to diagonal brace and be placed in insertion
After slot, the both ends of diagonal brace are abutted with support pier respectively, consequently facilitating prestressing force head stretch out after, the both ends of diagonal brace respectively with support pier
It pushes against, so that the position of diagonal brace is more acurrate, so that diagonal brace is more preferable to the support effect of preceding campshed；Meanwhile being conducive to pass through
Groove pre-fixes the position of diagonal brace between two support piers.
In conclusion the invention has the following advantages:
1. being conducive to the lateral rigidity of campshed before expanding, so that preceding campshed was being constructed to support preceding campshed by installation diagonal brace
It is not easy to topple in journey, meanwhile, be conducive to expansion deep basal pit utilizes space, convenient for construction behaviour of the construction personnel in deep basal pit
Make, be conducive to improve construction efficiency, in addition, comparing multiple-layer horizontal bracing members, diagonal brace only needs once to construct and can be installed, applies
Work is convenient, and also helping reduces construction cost and production cost, so that economic benefit improves；
2. by double-row pile and the coupling beam of first constructing, so that the side wall of deep basal pit can be by double-row pile to deep base in digging process
Hole side wall is supported, so that deep basal pit is not easy to collapse in digging process；
3. being supported by reserved slight slope to double-row pile, be conducive to the stability for improving double-row pile, so that double-row pile is excavating
It is not easy to collapse because of the gravity of the soil by rear campshed side in the process, is conducive to the safety for improving construction；
4. being not more than the 1/2 of deep basal pit altitude range by the soil body depth first excavated, so that the tip height of reserved slight slope is super
The height of the position of centre of gravity of preceding campshed is crossed, so that reserved slight slope can play the supporting role to preceding campshed, so that preceding campshed
It is not easy to collapse in the digging process of deep basal pit；
5. diagonal brace removes the construction of reserved slight slope again after the installation is completed by excavating embedded groove on reserved slight slope to install diagonal brace
Method, convenient for being conducive to supporting role of the reserved slight slope holding to preceding campshed while diagonal brace installation, so that preceding campshed exists
It is not easy the support force decline because reserving slight slope in the installation process of diagonal brace due to collapses；
6. the setting of prestressing force head is fixed with by wherein one end of diagonal brace, so that diagonal brace length after being placed in embedded groove is extending
To push against the support pier at both ends, while being conducive to enhance the support strength of diagonal brace, so that diagonal brace enhances the support force of preceding campshed,
So that preceding campshed is not easy to collapse.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the deep basal pit Retaining Structure with Double-row Piles in the present invention after implementation steps S1；
Fig. 2 is the structural schematic diagram of the deep basal pit Retaining Structure with Double-row Piles in the present invention after implementation steps S2；
Fig. 3 is the structural schematic diagram of the deep basal pit Retaining Structure with Double-row Piles in the present invention after implementation steps S3；
Fig. 4 is the structural schematic diagram of the deep basal pit Retaining Structure with Double-row Piles in the present invention after implementation steps S4, S5；
Fig. 5 is the structural schematic diagram of the deep basal pit Retaining Structure with Double-row Piles in the present invention after implementation steps S6, S7；
Fig. 6 is the structural schematic diagram of the deep basal pit Retaining Structure with Double-row Piles in the present invention after implementation steps S8, S9；
Fig. 7 is the structural schematic diagram of the deep basal pit Retaining Structure with Double-row Piles in the present invention after implementation steps S10.
In figure: 1, double-row pile；11, preceding campshed；12, rear campshed；13, coupling beam；2, deep basal pit；21, raft foundation；3, it supports
Pier；31, the first buttress；32, the second buttress；33, groove；4, slight slope is reserved；41, the first slight slope；42, the second slight slope；43, it is embedded in
Slot；5, diagonal brace；51, prestressing force head.
Specific embodiment
With reference to embodiments, invention is further described in detail.
Embodiment 1
A kind of construction method of deep foundation pit supporting structure, comprising the following steps:
The coupling beam 13 of S1, construction double-row pile 1 and double-row pile 1, double-row pile 1 include preceding campshed 11 and rear campshed 12 referring to Fig. 1,
It is specific as follows:
First the topography and geomorphology and Engineering Geologic Characteristics of construction site are investigated, deep base is determined according to the construction requirement at scene
The excavation range in hole 2 determines the position of preceding campshed 11 and rear campshed 12 further according to the excavation range of deep basal pit 2, and corresponding
Position make label.
Concrete-pile first is squeezed into the mark position of preceding campshed 11, and is accurately indicated at the top of concrete-pile using steel nail,
The eye-catching mark of red paint is used simultaneously.After the completion of all preceding campsheds 11 are respectively mounted, coagulation is squeezed into the mark position of rear campshed 12
Native stake, and accurately being indicated at the top of concrete-pile using steel nail, while with the eye-catching mark of red paint.
After the completion of current campshed 11 and rear campshed 12 are respectively mounted, coupling beam is poured between preceding campshed 11 and rear campshed 12
13。
S2, the excavation soil body are referring to fig. 2, specific as follows to preliminarily form deep basal pit 2:
The soil body is excavated to lower 6.3 meters of the depth of earth's surface.Then the top of the slope for reserving the first slight slope 41 is 5 meters wide, and bottom of slope is 7.2 meters wide, after
The continuous soil body that excavates is lower 10.3 meters to earth's surface.The transition reserved between the top of the slope of the second slight slope 42 and the bottom of slope of the first slight slope 41 again is flat
Platform is 1 meter wide, and bottom of slope is 11.3 meters wide, continues to excavate the soil body lower 18.9 meters to earth's surface, so that deep basal pit 2 preliminarily forms.
S3, the construction of the first buttress 31, specific as follows referring to Fig. 3:
It is first levelling to 2 bottom of deep basal pit, then in 2 bottom casting concrete bed course of deep basal pit, after concrete cushion is formed,
Raft board bottom muscle is bound on concrete cushion, then binds ground beam steel to form raft foundation 21.
Two the first buttresses 31 corresponding with the first slight slope 41 are poured on raft foundation 21 and on preceding campshed 11 respectively.
It is 1.5 meters that the first buttress 31 on raft foundation 21, which is placed in, at a distance from the one end of 42 bottom end of the second slight slope far from preceding campshed 11,
The first buttress 31 before being placed on campshed 11 is 0.5 meter at a distance from 41 top of the first slight slope.It is opened on two the first buttresses 31
There is the groove 33 being embedded in for diagonal brace 5.
S4, embedded groove 43 are constructed, referring to fig. 4, specific as follows:
Position of the diagonal brace 5 in the first slight slope 41 is determined according to the size of the position of two the first buttresses 31 and diagonal brace 5, and is done
Good position marks, then the side from the first slight slope 41 far from preceding campshed 11 is excavated according to label instruction.
S5, diagonal brace 5 are constructed, referring to fig. 4, specific as follows:
It is fixedly connected with a prestressing force head 51 in wherein one end of diagonal brace 5, and diagonal brace 5 is fixed with to one end court of prestressing force head 51
11 side of campshed forward, then diagonal brace 5 is hung in embedded groove 43, so that diagonal brace 5 is along embedded groove 43 towards two the first buttresses 31
On groove 33 move, and the both ends of diagonal brace 5 are respectively placed in the groove 33 of two the first buttresses 31.
By starting prestressing force head 51 so that the length of prestressing force head 51 so that the both ends of diagonal brace 5 respectively with
Two the first buttresses 31 are pushed against to realize support function.
S6, the first slight slope 41 is removed, specific as follows referring to Fig. 5:
Continue to excavate the soil body, the first slight slope 41 is removed completely, the second slight slope 42 is retained.
S7, the construction of the second buttress 32, specific as follows referring to Fig. 5:
Two the second buttresses 32 corresponding with the second slight slope 42 are poured on raft foundation 21 and on preceding campshed 11 respectively.It is placed in
The second buttress 32 on raft foundation 21 is 0.8 meter at a distance from the one end of 42 bottom end of the second slight slope far from preceding campshed 11, is placed in
The second buttress 32 on preceding campshed 11 is 0.5 meter at a distance from 42 top of the second slight slope.Confession is provided on two the second buttresses 32
The groove 33 that diagonal brace 5 is embedded in.
S8, embedded groove 43 are constructed, specific as follows referring to Fig. 6:
Position of the diagonal brace 5 in the second slight slope 42 is determined according to the size of the position of two the second buttresses 32 and diagonal brace 5, and is done
Good position marks, then the side from the second slight slope 42 far from preceding campshed 11 is excavated according to label instruction.
S9, diagonal brace 5 are constructed, specific as follows referring to Fig. 6:
It is fixedly connected with a prestressing force head 51 in wherein one end of diagonal brace 5, and diagonal brace 5 is fixed with to one end court of prestressing force head 51
11 side of campshed forward, then diagonal brace 5 is hung in embedded groove 43, so that diagonal brace 5 is along embedded groove 43 towards two the second buttresses 32
On groove 33 move, and the both ends of diagonal brace 5 are respectively placed in the groove 33 of two the second buttresses 32.
By starting prestressing force head 51 so that the length of prestressing force head 51 so that the both ends of diagonal brace 5 respectively with
Two the second buttresses 32 are pushed against to realize support function.
S10, the second slight slope 42 is removed, specific as follows referring to Fig. 7:
Second slight slope 42 is removed completely, that is, completes the excavation of deep basal pit 2, has been completed at the same time 2 double-row pile of deep basal pit, 1 supporting construction
Construction.
Embodiment 2
The difference from embodiment 1 is that:
In step S2, the concrete operations for excavating the soil body are as follows:
The soil body is excavated to lower 8.4 meters of the depth of earth's surface.Then the top of the slope for reserving the first slight slope 41 is 6 meters wide, and bottom of slope is 8.2 meters wide, after
The continuous soil body that excavates is lower 12.4 meters to earth's surface.The transition reserved between the top of the slope of the second slight slope 42 and the bottom of slope of the first slight slope 41 again is flat
Platform is 1.5 meters wide, and bottom of slope is 12.3 meters wide, continues to excavate the soil body lower 18.9 meters to earth's surface, so that deep basal pit 2 preliminarily forms.
In step S3, it is placed in one of the first buttress 31 and 42 bottom end of the second slight slope on raft foundation 21 far from preceding campshed 11
The distance at end is 2 meters, and the first buttress 31 before being placed on campshed 11 is 0.3 meter at a distance from 41 top of the first slight slope.
In step S7, it is placed in one of the second buttress 32 and 42 bottom end of the second slight slope on raft foundation 21 far from preceding campshed 11
The distance at end is 1.1 meters, and the second buttress 32 before being placed on campshed 11 is 0.3 meter at a distance from 42 top of the second slight slope.
Embodiment 3
The difference from embodiment 1 is that:
In step S2, the concrete operations for excavating the soil body are as follows:
The soil body is excavated to lower 9.45 meters of the depth of earth's surface.Then the top of the slope for reserving the first slight slope 41 is 7 meters wide, and bottom of slope is 10.7 meters wide,
Continue to excavate the soil body lower 14.7 meters to earth's surface.The transition between the top of the slope of the second slight slope 42 and the bottom of slope of the first slight slope 41 is reserved again
Platform is 2 meters wide, and bottom of slope is 14.6 meters wide, continues to excavate the soil body lower 18.9 meters to earth's surface, so that deep basal pit 2 preliminarily forms.
In step S3, it is placed in one of the first buttress 31 and 42 bottom end of the second slight slope on raft foundation 21 far from preceding campshed 11
The distance at end is 2 meters, and the first buttress 31 before being placed on campshed 11 is 1 meter at a distance from 41 top of the first slight slope.
In step S7, it is placed in one of the second buttress 32 and 42 bottom end of the second slight slope on raft foundation 21 far from preceding campshed 11
The distance at end is 0.8 meter, and the second buttress 32 before being placed on campshed 11 is 0.5 meter at a distance from 42 top of the second slight slope.
The embodiment of present embodiment is presently preferred embodiments of the present invention, not limits protection of the invention according to this
Range, therefore: the equivalence changes that all structures under this invention, shape, principle are done, should all be covered by protection scope of the present invention it
It is interior.
Claims (9)
1. a kind of construction method of deep foundation pit supporting structure, it is characterized in that: the following steps are included:
S1, construction double-row pile (1) and double-row pile (1) coupling beam (13), the double-row pile (1) include preceding campshed (11) and after
Campshed (12)；
S2, excavate the soil body to preliminarily form deep basal pit (2), while excavating the soil body on deep basal pit (2) side wall reserved part
The soil body is to form reserved slight slope (4), and the distance between top and deep basal pit (2) bottom of the reserved slight slope (4) are not less than deep
The 1/2 of foundation pit (2) height；
S3, support pier (3) construction are placed in institute on the preceding campshed (11) and deep basal pit (2) bottom construction supporting pier (3)
State the distance between support pier (3) and deep basal pit (2) bottom on preceding campshed (11) is not less than deep basal pit (2) height 1/2；
S4, embedded groove (43) construction, excavate on the reserved slight slope (4) and are implanted into reserved slight slope (4) for diagonal brace (5) with fixation
In the embedded groove (43) on support pier (3), the both ends of embedded groove (43) respectively on preceding campshed (11) and deep basal pit (2) bottom
Support pier (3) face；
S5, diagonal brace (5) construction, wherein one end of diagonal brace (5) is fixed with prestressing force head (51), diagonal brace (5) is hung in embedded groove
(43) in, by starting prestressing force head (51) both ends of diagonal brace (5) are pushed against respectively with support pier (3)；
S6, remaining soils are removed.
2. a kind of construction method of deep foundation pit supporting structure according to claim 1, it is characterized in that: in the step S2,
The distance between top and deep basal pit (2) bottom of the reserved slight slope (4) are the 1/2-2/3 of deep basal pit (2) height.
3. a kind of construction method of deep foundation pit supporting structure according to claim 2, it is characterized in that: in the step S3,
The support pier (3) being placed on the preceding campshed (11) is disposed adjacent to the position on reserved slight slope (4) top.
4. the construction method of a kind of deep foundation pit supporting structure according to claim 1 to 3, it is characterized in that: the step
In S2, the cross section of the reserved slight slope (4) is trapezoidal, and the small bottom end in top of the reserved slight slope (4) is big.
5. the construction method of a kind of deep foundation pit supporting structure according to claim 1 to 3, it is characterized in that: the step
In S2, the reserved slight slope (4) includes the first slight slope (41) and the second slight slope (42), first slight slope (41) and second
The trapezoidal shape in the cross section of slight slope (42), first slight slope (41) and the second slight slope (42) the small bottom end in top are big, institute
State the top that the first slight slope (41) is placed in the second slight slope (42), the bottom of the top of second slight slope (42) than the first slight slope (41)
End is big.
6. the construction method of a kind of deep foundation pit supporting structure according to claim 5, it is characterized in that: the support pier (3)
Including the first buttress (31) and the second buttress (32), first buttress (31) corresponding first slight slope (41) setting, described the
Two buttresses (32) corresponding second slight slope (42) setting, the corresponding two groups of support piers (3) of the diagonal brace (5) are equipped with two.
7. a kind of construction method of deep foundation pit supporting structure according to claim 6, it is characterized in that: in the step S3,
It constructs the first buttress (31), the embedded groove in the step S4, on corresponding first slight slope (41) of construction the first buttress (31)
(43), in the step S5, the corresponding diagonal brace (5) of construction the first buttress (31)；In the step S6, the first slight slope is removed
(41), it after the step S6, follows the steps below:
S7, the second buttress (32) construction, on the preceding campshed (11) and the second buttress (32) are constructed in deep basal pit (2) bottom；
S8, embedded groove (43) construction, excavate on second slight slope (42) and are implanted into the second slight slope (42) for diagonal brace (5) with solid
Due to the embedded groove (43) on the second buttress (32), the both ends of embedded groove (43) are respectively and on preceding campshed (11) and deep basal pit
(2) the second buttress (32) face of bottom；
S9, diagonal brace (5) construction, wherein one end of diagonal brace (5) is fixed with prestressing force head (51), diagonal brace (5) is hung in embedded groove
(43) in, by starting prestressing force head (51) both ends of diagonal brace (5) are pushed against respectively with the second buttress (32)；
S10, the second slight slope (42) are removed.
8. a kind of construction method of deep foundation pit supporting structure according to claim 7, it is characterized in that: in the step S3,
Before first buttress (31) of constructing, raft foundation (21) first are laid in the deep basal pit (2) bottom, support pier (3) is solid
Due on raft foundation (21).
9. the construction method of a kind of deep foundation pit supporting structure according to claim 1 to 3, it is characterized in that: the support
The groove (33) for diagonal brace (5) insertion is provided on pier (3).
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| CN110318402A (en) * | 2019-07-01 | 2019-10-11 | 广东建星建造集团有限公司 | A kind of deep basal pit back-pressure soil adds diagonal brace form construction method for supporting |
| CN111705809A (en) * | 2020-06-18 | 2020-09-25 | 深圳市蛇口招商港湾工程有限公司 | Deep foundation pit construction structure and deep foundation pit construction method |
| CN114575356A (en) * | 2022-04-15 | 2022-06-03 | 中国建筑第二工程局有限公司 | Foundation pit supporting structure, supporting pile transaction processing method and basement construction method |
| CN115506419A (en) * | 2022-09-06 | 2022-12-23 | 深圳市基础工程有限公司 | Seamless leakage-proof construction method for basement exterior wall |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110318402A (en) * | 2019-07-01 | 2019-10-11 | 广东建星建造集团有限公司 | A kind of deep basal pit back-pressure soil adds diagonal brace form construction method for supporting |
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| CN114575356A (en) * | 2022-04-15 | 2022-06-03 | 中国建筑第二工程局有限公司 | Foundation pit supporting structure, supporting pile transaction processing method and basement construction method |
| CN114575356B (en) * | 2022-04-15 | 2024-01-05 | 中国建筑第二工程局有限公司 | Foundation pit supporting structure, supporting pile abnormal movement processing method and basement construction method |
| CN115506419A (en) * | 2022-09-06 | 2022-12-23 | 深圳市基础工程有限公司 | Seamless leakage-proof construction method for basement exterior wall |
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