CN112482392A - Integrated foundation pit supporting structure and construction method thereof - Google Patents
Integrated foundation pit supporting structure and construction method thereof Download PDFInfo
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- CN112482392A CN112482392A CN202011305139.9A CN202011305139A CN112482392A CN 112482392 A CN112482392 A CN 112482392A CN 202011305139 A CN202011305139 A CN 202011305139A CN 112482392 A CN112482392 A CN 112482392A
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- 238000010276 construction Methods 0.000 title claims abstract description 37
- 239000002689 soil Substances 0.000 claims abstract description 66
- 239000004568 cement Substances 0.000 claims description 42
- 229910000831 Steel Inorganic materials 0.000 claims description 38
- 239000010959 steel Substances 0.000 claims description 38
- 230000000712 assembly Effects 0.000 claims description 20
- 238000000429 assembly Methods 0.000 claims description 20
- 239000011150 reinforced concrete Substances 0.000 claims description 14
- 239000000126 substance Substances 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000005553 drilling Methods 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 230000010354 integration Effects 0.000 claims 1
- 239000010874 unset cement Substances 0.000 claims 1
- 238000006073 displacement reaction Methods 0.000 abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 238000004873 anchoring Methods 0.000 abstract 1
- 238000004064 recycling Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 7
- 239000004567 concrete Substances 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 4
- 230000002787 reinforcement Effects 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 241000826860 Trapezium Species 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
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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)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The invention discloses an integrated foundation pit supporting structure and a construction method thereof, wherein the integrated foundation pit supporting structure comprises a cement-soil wall arranged at a foundation pit supporting position, a prefabricated part integrally arranged in the cement-soil wall and a connecting piece; at least one connecting piece comprises an end plug-in piece and a splicing piece, and a groove with the concave direction perpendicular to the connecting direction of the two prefabricated parts is formed in the end plug-in piece and/or the splicing piece. The invention combines the advantages of the cement-soil wall and the prefabricated member, improves the integral rigidity of the supporting structure, can effectively control the horizontal displacement of the supporting structure, has good water stopping effect, and can eliminate the supporting and anchoring of the foundation pit. The construction method is suitable for projects needing strict control of horizontal displacement, and compared with a conventional supporting structure, the construction method is good in economy, faster in construction speed, higher in working efficiency, and capable of recycling part of components and ensuring safety.
Description
Technical Field
The invention relates to the field of foundation pit supporting structures and construction thereof, in particular to an integrated foundation pit supporting structure and a construction method thereof.
Background
The foundation pit supporting structure is a retaining, reinforcing and protecting structure for the side wall of the foundation pit or the surrounding environment in order to ensure the safety of underground construction and the surrounding environment of the foundation pit.
The common mode is to implant a single pile body in the cement soil, and H-shaped steel can be arranged in the pile body according to the requirement to improve the integral rigidity. For example, both of the patent applications 201721092849.1 and 201721092865.0 are based on the formation of a supporting structure by embedding prefabricated members in a concrete wall.
However, the horizontal rigidity of the arrangement mode is weak, the reliability of the water stopping effect is low, and meanwhile, the horizontal displacement is controlled by matching with the inner support and the anti-pulling anchor cable, the inner support influences subsequent construction, and the anchor cable possibly influences the safety of the surrounding environment.
Disclosure of Invention
The invention aims to provide an integrated foundation pit supporting structure and a construction method thereof, and aims to solve the problems that the supporting structure in the prior art is small in overall rigidity, poor in stability, large in horizontal displacement under the influence of external force and unstable in water stopping effect.
In order to solve the technical problems, the invention specifically provides the following technical scheme:
an integrated foundation pit supporting structure comprises a cement-soil wall arranged in a foundation pit, prefabricated components inserted into the cement-soil wall, and at least one connecting piece used for connecting two adjacent prefabricated components; wherein the content of the first and second substances,
the connecting piece comprises at least one end plug-in unit connected with the prefabricated parts and a splicing piece spliced between the two end plug-in units, grooves with the concave directions perpendicular to the connecting direction of the two prefabricated parts are formed in the end plug-in units and/or the splicing piece, and the concave directions of the two adjacent grooves are opposite.
As a preferable scheme of the present invention, the connecting member is a cast-in-place reinforced concrete beam slab connecting top ends of two adjacent prefabricated members, and the two adjacent prefabricated members are connected to form an integral structure along an extending direction of the cement wall through the cast-in-place reinforced concrete beam slab.
As a preferable scheme of the invention, the connecting piece is a steel member which is used for connecting two adjacent prefabricated components and is positioned in the middle of the prefabricated components; two adjacent prefabricated components and steel components connecting the prefabricated components form a set of prefabricated component assemblies, and the steel components in one of two adjacent sets of prefabricated component assemblies are arranged in the cement soil wall.
As a preferred aspect of the present invention, at least the steel member located outside the cement wall includes the end inserts and the splice; and the number of the first and second electrodes,
a plurality of convex anti-impact ribs extending along the insertion direction of the prefabricated part are formed on the concave surface of the groove;
and a plurality of drainage holes are formed in the steel member at least outside the cement soil wall in a penetrating manner.
As a preferable scheme of the present invention, the outer side surface of the prefabricated component extends outward to form a plurality of positioning extension rods for positioning and arranging the end plug-in units, and a mounting hole matched with the positioning extension rod and used for inserting the positioning extension rod is formed in one side of the end plug-in unit facing the prefabricated component.
In a preferred embodiment of the present invention, the cement wall includes at least one set of foundation walls arranged in parallel, and a plurality of bridging walls connecting the foundation walls in parallel, wherein gaps are formed between the bridging walls, the prefabricated members are located in the foundation walls, and at least part of the steel members are located in the bridging walls.
In order to solve the above technical problems, the present invention further provides the following technical solutions:
a construction method based on the integrated foundation pit supporting structure comprises the following steps:
s100, selecting a construction area, and driving a cement-soil wall into the construction area;
s200, connecting two adjacent prefabricated parts in a limiting way through a limiting piece for limiting the relative positions of the two prefabricated parts to form a group of assemblies;
s300, when the cement soil wall is not solidified, integrally positioning a plurality of groups of assemblies and then sequentially driving the assemblies into the cement soil wall;
and S400, connecting the top ends of the prefabricated parts in each group of assemblies driven into the cement soil wall into an integral structure through cast-in-place reinforced concrete.
As a preferred embodiment of the present invention, step S100 specifically includes:
s101, site processing: cleaning a field to level the field, measuring and setting out the field, and delimiting a construction area of the cement-soil wall;
s102, excavating a groove: digging a groove in a selected construction area, determining the initial position, the diameter and the lap joint width of a mixing pile forming the cement-soil wall, and correspondingly marking the position of the mixing pile in the groove to form a pouring area of the cement-soil wall;
s103, constructing a cement soil wall: and positioning and drilling holes, and grouting to form the cement-soil wall.
In a preferred embodiment of the present invention, in step S300, a plurality of stoppers are sequentially provided on the prefabricated member from top to bottom, and the driving method includes:
s301, vertically tamping a group of symmetrically arranged prefabricated components by adopting a first tamping frequency until the limiting part connected with the bottommost part of the prefabricated components is completely immersed into the cement-soil wall;
s302, continuously and vertically tamping the prefabricated part by adopting a second tamping frequency until the bottom of the limiting part positioned at the top is positioned above the cement-soil wall;
s303, vertically tamping until the limiting piece connected with the prefabricated part is completely immersed into the cement-soil wall by adopting a first tamping frequency; wherein the content of the first and second substances,
the first tamping frequency is greater than the second tamping frequency.
As a preferred embodiment of the present invention, step S400 specifically includes:
s401, adopting a cast-in-place reinforced concrete beam plate as a connecting piece: after binding by adopting a reinforcement cage according to a preset size, pouring concrete to form an integral structure;
s402, adopting a steel component as a connecting piece: and the steel members for connecting the adjacent two prefabricated parts are manufactured after the steel plates and the plurality of reinforcing ribs are welded.
Compared with the prior art, the invention has the following beneficial effects:
1) the prefabricated components are connected through the steel components to form a connection whole, so that the horizontal rigidity of the prefabricated components is improved, and the integral impact resistance is further improved;
2) the method is characterized in that a mode of splicing and forming end plug-ins and splicing pieces is adopted for part of steel members, and grooves are further formed in the end plug-ins and/or the splicing pieces, so that the adjustment can be performed in a better targeted manner, and the requirement for constructing the whole foundation is further met on the premise of ensuring the supporting performance;
3) the distribution configuration in the tamping process can be better adjusted in a targeted manner, and further backfilling is carried out through earthwork, so that the whole structure is better adapted to the overall layout of the foundation, and the whole structure is better integrated into the foundation.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
Fig. 1 is a schematic structural diagram of an integrated foundation pit supporting structure provided in an embodiment of the present invention;
fig. 2 is a partial cross-sectional view of an integrated foundation pit supporting structure according to an embodiment of the present invention;
fig. 3 is a partial cross-sectional view of another location of one of the integrated excavation supporting structures provided by embodiments of the present invention;
fig. 4 is a partial cross-sectional view of another integrated foundation pit supporting structure provided in an embodiment of the present invention;
fig. 5 is a partial cross-sectional view of another location of another integrated excavation supporting structure provided by an embodiment of the present invention;
FIG. 6 is a cross-sectional view of a steel member provided by an embodiment of the present invention;
FIG. 7 is a partial cross-sectional view of a steel member provided in accordance with an embodiment of the present invention;
fig. 8 is a flowchart of a construction method according to an embodiment of the present invention.
The reference numerals in the drawings denote the following, respectively:
1-cement soil wall; 3-casting the reinforced concrete beam slab in situ;
11-a foundation wall; 12-bridging walls;
21-a prefabricated part; 22-a steel member; 23-an end insert; 24-a splice; 25-a groove; 26-impact resistant ribs; 27-a weep hole;
221-a first connection segment; 222-a first diagonally extending section; 223-a second connecting segment; 224-a second diagonally extending section; 225-a third connection segment; 226-a stopper plate; 227-cutting; 228-mounting holes.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 7, the present invention provides an integrated foundation pit supporting structure, which includes a cement soil wall 1 disposed in a foundation pit, prefabricated components 21 inserted into the cement soil wall 1, and at least one connecting member for connecting two adjacent prefabricated components 21; wherein the content of the first and second substances,
at least one of the connectors comprises an end plug-in 23 connected with the prefabricated part 21 and a splicing piece 24 spliced between the two end plug-in 23, grooves 25 with the concave directions perpendicular to the connecting direction of the two prefabricated parts 21 are formed on the end plug-in 23 and/or the splicing piece 24, and the concave directions of the two adjacent grooves 25 are opposite.
Whole supporting construction adopts cement earth wall 1 and the setting mode that prefabricated component 21 cooperation was inlayed, and connect adopting steel member 22 between two adjacent prefabricated component 21 of multiunit, thereby effectively improve holistic space framework, make it fuse in the ground is whole better, and simultaneously, adopt the mode of tip plug-in components 23 and the concatenation of splice 24 to at least partial steel member 22, at whole supporting construction's construction in-process, can adjust steel member 22 is whole better, adaptation earthwork is backfilled better, the construction forms better ground component part.
In one preferred embodiment of the present invention, the connecting member is a cast-in-place reinforced concrete beam slab 3 connecting top ends of two adjacent prefabricated units 21, and the two adjacent prefabricated units 21 are connected to form an integral structure along an extending direction of the cement wall 1 through the cast-in-place reinforced concrete beam slab 3. The stable connection relationship between the two prefabricated parts 21 is effectively ensured by adopting the cast-in-place reinforced concrete beam plate 3 arranged at the top ends of the prefabricated parts 21.
In another preferred embodiment of the present invention, the connecting member is a steel member 22 located at the middle of the prefabricated member 21 for connecting two adjacent prefabricated members 21; two adjacent prefabricated components 21 and the steel member 22 connecting the prefabricated components 21 are formed into one prefabricated component assembly, and the steel member 22 in one of the two adjacent prefabricated component assemblies is arranged in the cement soil wall 1. By arranging the steel members 22 in one of the adjacent prefabricated member assemblies in the cement soil wall 1, the other prefabricated member assembly can be arranged at least partially outside the cement soil wall 1 (here, the part in the cement soil wall 1 is mainly the connecting section of the prefabricated member 21), so that the whole supporting structure can be combined with the construction environment by burying the steel members 22 outside the cement soil wall 1 in the soil, and based on the arrangement, the impact resistance can be better influenced by the impact and the like in the environment through the matching of a plurality of layers of different prefabricated member assemblies, meanwhile, the whole arrangement of the prefabricated member assemblies ensures that at least two prefabricated members 21 can be connected through the steel members 22, so that the formed prefabricated member assembly can have better horizontal rigidity, and under the premise of forming the whole structure, the whole rigidity of the supporting structure can be better increased, effectively control the displacement in the horizontal direction and better play a role in stopping water.
In a further preferred embodiment, in order to better reduce the construction difficulty and to effectively ensure the overall variability, at least the steel member 22 located outside the cement wall 1 comprises the end insert 23 and the splicing member 24; and the number of the first and second electrodes,
the concave surface of the groove 25 is provided with a plurality of convex impact-proof ribs 26 which extend along the insertion direction of the prefabricated part 21;
a plurality of drain holes 27 are formed through at least the steel member 22 located outside the cement wall 1. Of course, the impact protection rib 26 may be a cylindrical rib, or may have any other suitable structure, such as a triangular prism.
In a more preferred embodiment of the present invention, as shown in fig. 4, the end insert 23 and/or the splice 24 includes a first connecting section 221, a first diagonally extending section 222, a second connecting section 223, a second diagonally extending section 224 and a third connecting section 225 which are connected in sequence and formed into an integral structure, and the first connecting section 221 and the third connecting section 225 are in the same line along the connecting direction of two adjacent prefabricated components 21.
In a further preferred embodiment, one of the adjacent end inserts 23 and/or the end of the splicing element 24 contacting each other is recessed inwards to form a slot, and a stop plate 226 is formed at the bottom of the slot, and the corresponding end insert 23 and/or the splicing element 24 adjacent to the slot is formed as a strip 227. Through the cooperation setting of slot and cutting 227 to can realize the grafting setting of the two better, be convenient for in the installation of actual operation in-process, and, can insert cutting 227 from the top in the slot, simultaneously, insert the back at cutting 227, carry out the backstop through bottom backstop board 226, keep the stability of bottom, avoid the two to take place to remove in vertical direction. Of course, the entire end insert 23 and the splice 24 are each formed as a unitary structure, and the stop plate 226 is also part of the end insert 23 or the splice 24 and is formed as a unitary structure with the other parts, thereby maintaining the stability of the entire structure.
In a more preferred embodiment, a plurality of positioning extension rods for positioning and arranging the end plug-in 23 are formed by extending the outer side surface of the prefabricated part 21 outwards, and a mounting hole 228 matched with the positioning extension rod and used for inserting the positioning extension rod is formed in one side of the end plug-in 23 facing the prefabricated part 21. Of course, mounting hole 228 here can further form trapezoidal, and reduce from the inboard cross-section of terminal surface gradually to make can correspond inserting of cooperation location extension rod and establish, certainly, the location extension rod can be not more than the sectional area of the trapezium structure's of mounting hole 228 bottom for the sectional area, thereby make tip plug-in components 23 can adjust certain angle wantonly for the location extension rod, and after adjusting, through pouring into glue or concrete with the two effective sealing connection, guarantee holistic stability. The angular adjustment here is, of course, merely an adjustment of a certain inclination by angling relative to the original direction of connection, so that the end inserts 23 at both ends can still remain connected to the opposite set of prefabricated parts 21.
In a more preferred embodiment, the cement wall 1 at least comprises a group of foundation walls 11 arranged in parallel, and bridge walls 12 connecting the parallel foundation walls 11, wherein gaps are formed between a plurality of bridge walls 12, the prefabricated members 21 are located in the foundation walls 11, and at least part of the steel members 22 are located in the bridge walls 12.
In another aspect of the embodiment of the present invention, as shown in fig. 8, there is also provided a construction method based on the integrated foundation pit supporting structure, including:
s100, selecting a construction area, and driving a cement-soil wall into the construction area;
s200, connecting two adjacent prefabricated parts in a limiting way through a limiting piece for limiting the relative positions of the two prefabricated parts to form a group of assemblies;
s300, when the cement soil wall is not solidified, integrally positioning a plurality of groups of assemblies and then sequentially driving the assemblies into the cement soil wall;
and S400, connecting the top ends of the prefabricated parts in each group of assemblies driven into the cement soil wall into an integral structure through cast-in-place reinforced concrete.
Whole setting is based on the common cooperation of prefabricated component and connecting piece and is connected, based on the backfill of cement soil wall and earth on this basis, constructs on the whole and forms the structure of one set of system with the ground sharing, on this basis, it not only can have better horizontal rigidity, further improves its shock resistance performance such as, simultaneously in the whole operation in-process in later stage, can realize better with the suitability of ground.
In a further preferred embodiment, step S100 specifically includes:
s101, site processing: cleaning a field to level the field, measuring and setting out the field, and delimiting a construction area of the cement-soil wall;
s102, excavating a groove: digging a groove in a selected construction area, determining the initial position, the diameter and the lap joint width of a mixing pile forming the cement-soil wall, and correspondingly marking the position of the mixing pile in the groove to form a pouring area of the cement-soil wall;
s103, constructing a cement soil wall: and positioning and drilling holes, and grouting to form the cement-soil wall. Specifically, a deep mixer or a high-pressure rotary spraying machine is adopted to forcibly mix cement materials and undisturbed soil, so that cement and soil are combined to form a cylinder (flexible pile) with certain specific strength and overall stability, and the cylinder (flexible pile) is mutually overlapped to form a cement-soil wall with certain strength and an overall structure.
In step S200, the connection of the prefabricated component and the limiting member specifically includes: two prefabricated components are assembled in advance, each group of prefabricated components are connected by virtue of a limiting part in the direction perpendicular to the cement-soil wall, at least one or more limiting parts of each group of prefabricated components are connected, and the limiting parts can be connected horizontally or obliquely. Of course, it should be further noted that the limiting member can be equivalent to a part of the connecting member, and the limiting member is preferably a steel member.
Of course, the components herein may be driven in batches in sequence, and each batch may include multiple sets of components. In a further preferred embodiment, in order to improve the adaptability of the cement-soil wall in the whole process, in step S300, a plurality of stoppers are sequentially disposed on the prefabricated member from top to bottom, and the driving manner includes:
s301, vertically tamping a group of symmetrically arranged prefabricated components by adopting a first tamping frequency until the limiting part connected with the bottommost part of the prefabricated components is completely immersed into the cement-soil wall;
s202, continuously and vertically tamping the prefabricated part by adopting a second tamping frequency until the bottom of the limiting part positioned at the top is positioned above the cement-soil wall;
s203, vertically tamping until the limiting piece connected with the prefabricated part is completely immersed into the cement-soil wall by adopting a first tamping frequency; wherein the content of the first and second substances,
the first tamping frequency is greater than the second tamping frequency.
Such mode of setting up makes the frequency of ramming in earlier stage and later stage faster, is convenient for squeeze into better, and the mode of ramming that falls in mid-stage can be filled through the mobility adaptability of the cement soil wall that does not solidify better, guarantees when increasing the ramming of steel skeleton isotructure, can not destroy cement soil wall wholly, coordinates the whole of ground to build better.
In a more preferred embodiment, step S400 specifically includes:
s401, adopting a cast-in-place reinforced concrete beam plate as a connecting piece: binding and manufacturing a reinforcement cage according to design requirements, installing a template according to the size requirements of a cast-in-place reinforced concrete beam plate, and pouring concrete after the acceptance of a reinforcement project and a template project is passed to form an integral structure;
s402, adopting a steel component as a connecting piece: and the steel members for connecting the adjacent two prefabricated parts are manufactured after the steel plates and the plurality of reinforcing ribs are welded.
Specifically, the connecting pieces are arranged in a lattice mode along the direction of the cement wall and the connecting direction of each group of prefabricated parts.
The above embodiments are only exemplary embodiments of the present application, and are not intended to limit the present application, and the protection scope of the present application is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present application and such modifications and equivalents should also be considered to be within the scope of the present application.
Claims (10)
1. The utility model provides an integration foundation ditch supporting construction, its characterized in that includes whole assembled structure of arranging in unset cement soil (1), assembled structure and cement soil combine together to form foundation ditch supporting construction, assembled structure includes at least two vertical prefabricated component (21) that set up to and at least one is used for connecting adjacent two prefabricated component (21)'s connecting piece.
2. An integrated foundation pit supporting structure according to claim 1, wherein at least one connecting piece comprises an end insert (23) connected with the prefabricated part (21) and a splicing piece (24) spliced and arranged between the two end inserts (23), grooves (25) with the concave direction perpendicular to the connecting direction of the two prefabricated parts (21) are formed in the end inserts (23) and/or the splicing piece (24), and the concave directions of the two adjacent grooves (25) are opposite.
3. An integrated foundation pit supporting structure according to claim 1, wherein the connecting member is a cast-in-place reinforced concrete beam slab (3) connecting top ends of two adjacent prefabricated members (21), and the two adjacent prefabricated members (21) are connected into an integrated structure along the extending direction of the cement soil wall (1) through the cast-in-place reinforced concrete beam slab (3).
4. An integrated foundation pit supporting structure according to claim 1, characterized in that the connecting member is a steel member (22) for connecting two adjacent prefabricated units (21) and located between the prefabricated units (21);
two adjacent prefabricated parts (21) and a steel member (22) connecting the prefabricated parts (21) form a set of prefabricated part assemblies, and the steel member (22) in one of the two adjacent sets of prefabricated part assemblies is arranged in the cement soil wall (1).
5. An integrated foundation pit supporting structure according to claim 4, characterized in that at least the steel member (22) located outside the cement wall (1) comprises the end insert (23) and the splice (24); and the number of the first and second electrodes,
the concave surface of the groove (25) is provided with a plurality of convex impact-proof ribs (26) which extend along the insertion direction of the prefabricated part (21);
a plurality of drainage holes (27) are formed through the steel member (22) at least outside the cement wall (1).
6. An integrated foundation pit supporting structure according to claim 1 or 2, wherein the outer side surface of the prefabricated part (21) extends outwards to form a plurality of positioning extension rods for positioning and arranging the end plug-in units (23), and a mounting hole (228) matched with the positioning extension rod and used for inserting the positioning extension rod is formed in one side of the end plug-in unit (23) facing the prefabricated part (21).
7. An integrated foundation pit supporting structure according to any one of claims 3-5, wherein the cement-soil wall (1) comprises at least one set of foundation walls (11) arranged in parallel and a plurality of bridge walls (12) connecting the parallel foundation walls (11), gaps are formed between the plurality of bridge walls (12), the prefabricated members (21) are located in the foundation walls (11), and at least part of the steel members (22) are located in the bridge walls (12).
8. A construction method of an integrated foundation pit supporting structure based on any one of claims 1-7, characterized by comprising the following steps:
s100, selecting a construction area, and driving a cement-soil wall into the construction area;
s200, connecting two adjacent prefabricated parts in a limiting way through a limiting piece for limiting the relative positions of the two prefabricated parts to form a group of assemblies;
s300, when the cement soil wall is not solidified, integrally positioning a plurality of groups of assemblies and then sequentially driving the assemblies into the cement soil wall;
and S400, connecting the top ends of the prefabricated parts in each group of assemblies driven into the cement soil wall into an integral structure through cast-in-place reinforced concrete.
9. The construction method according to claim 8, wherein step S100 specifically comprises:
s101, site processing: cleaning a field to level the field, measuring and setting out the field, and delimiting a construction area of the cement-soil wall;
s102, excavating a groove: digging a groove in a selected construction area, determining the initial position, the diameter and the lap joint width of a mixing pile forming the cement-soil wall, and correspondingly marking the position of the mixing pile in the groove to form a pouring area of the cement-soil wall;
s103, constructing a cement soil wall: and positioning and drilling holes, and grouting to form the cement-soil wall.
10. The construction method according to claim 8 or 9, wherein in step S300, a plurality of the position-limiting members are sequentially disposed on the prefabricated member from top to bottom, and the disposing manner includes:
s301, vertically tamping a group of symmetrically arranged prefabricated components by adopting a first tamping frequency until the limiting part connected with the bottommost part of the prefabricated components is completely immersed into the cement-soil wall;
s302, continuously and vertically tamping the prefabricated part by adopting a second tamping frequency until the bottom of the limiting part positioned at the top is positioned above the cement-soil wall;
s303, vertically tamping until the limiting piece connected with the prefabricated part is completely immersed into the cement-soil wall by adopting a first tamping frequency; wherein the content of the first and second substances,
the first tamping frequency is greater than the second tamping frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202011305139.9A CN112482392A (en) | 2020-11-19 | 2020-11-19 | Integrated foundation pit supporting structure and construction method thereof |
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| CN202011305139.9A CN112482392A (en) | 2020-11-19 | 2020-11-19 | Integrated foundation pit supporting structure and construction method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008035911A1 (en) * | 2006-09-19 | 2008-03-27 | Young Chang Construction Co., Ltd | Soil guard structure and establishment method |
| CN206512723U (en) * | 2017-02-27 | 2017-09-22 | 钱亮 | A kind of multiple-layer horizontal coupling beam double-row pile and underground pipe gallery monolithic construction |
| CN107326898A (en) * | 2017-08-29 | 2017-11-07 | 南京市测绘勘察研究院股份有限公司 | A kind of cement soil wall interpolation rigidity can adjust drum prefabricated pile supporting construction and its construction method |
| CN109403347A (en) * | 2018-11-26 | 2019-03-01 | 中建局集团建设发展有限公司 | A kind of frame-type double-row pile cement soil wall foundation pit enclosure structure and its construction method |
| CN209603116U (en) * | 2019-01-23 | 2019-11-08 | 广东建基基础工程有限公司 | A kind of combined steel plate pile |
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2020
- 2020-11-19 CN CN202011305139.9A patent/CN112482392A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008035911A1 (en) * | 2006-09-19 | 2008-03-27 | Young Chang Construction Co., Ltd | Soil guard structure and establishment method |
| CN206512723U (en) * | 2017-02-27 | 2017-09-22 | 钱亮 | A kind of multiple-layer horizontal coupling beam double-row pile and underground pipe gallery monolithic construction |
| CN107326898A (en) * | 2017-08-29 | 2017-11-07 | 南京市测绘勘察研究院股份有限公司 | A kind of cement soil wall interpolation rigidity can adjust drum prefabricated pile supporting construction and its construction method |
| CN109403347A (en) * | 2018-11-26 | 2019-03-01 | 中建局集团建设发展有限公司 | A kind of frame-type double-row pile cement soil wall foundation pit enclosure structure and its construction method |
| CN209603116U (en) * | 2019-01-23 | 2019-11-08 | 广东建基基础工程有限公司 | A kind of combined steel plate pile |
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