CN105804088A - Construction method for dismounting staging wall and temporary support in staging construction of deep foundation pit - Google Patents
Construction method for dismounting staging wall and temporary support in staging construction of deep foundation pit Download PDFInfo
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- CN105804088A CN105804088A CN201610163731.7A CN201610163731A CN105804088A CN 105804088 A CN105804088 A CN 105804088A CN 201610163731 A CN201610163731 A CN 201610163731A CN 105804088 A CN105804088 A CN 105804088A
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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 invention discloses a construction method for dismounting a staging wall and a temporary support in staging construction of a deep foundation pit. The construction method comprises the following steps: (1) the staging wall is constructed; and with the staging wall as boundary, the foundation pit engineering construction of a front pit is performed until a foundation baseplate is finished and a basement structure of the front pit is formed; (2) with the staging wall as boundary, the earth excavation of a back pit is begun, and meanwhile, the temporary support construction is performed to finish a foundation baseplate of the back pit; (3) the temporary support of the back pit is dismounted from bottom to top layer by layer, and a basement structure of the back pit is constructed; (4) beam through holes are formed in all layers of structural beams of the front pit corresponding to the staging wall; the back pit is connected with the structural beam on the same layer of the front pit as a whole through the beam through holes to form one complete structural beam until the basement structure of the back pit is finished; and the staging wall is dismounted from top to bottom at a time; and (5) the vacancy filling of all layers of structures is finished. The construction method can improve the construction efficiency and save the cost, satisfies the development requirements of green construction, and overcomes secondary deformation defect of the deep foundation pit.
Description
Technical field
The present invention relates to technical field of building construction, particularly to the construction method that in a kind of deep basal pit stage construction, wall and temporary support are removed by stages.
Background technology
Soft Soil Foundation Pit front and back being divided to hole construction supports, it is necessary to arrange wall by stages between Qian Keng and rear hole.Traditional method is that Qian Keng and Hou Keng takes identical construction technology, namely first along to cheating the end, period arranges support, then carries out from the bottom up removing the construction supporting and completing each Rotating fields in deep basal pit underground, finally layering, in batches, carry out the dismounting of wall by stages in installments.This kind of method takes time and effort, it is necessary to arrange a large amount of temporary support, causes the waste of material and manpower, and wall disposable can't be uniformly carried out dismounting by stages, efficiency of construction is substantially reduced, and have impact on the duration, cause unnecessary waste, be unsatisfactory for the demand for development of green construction.
Summary of the invention
The technical problem to be solved is, overcome above deficiency, the construction method that in a kind of deep basal pit stage construction, wall and temporary support are removed by stages is provided, to improve efficiency of construction, to save artificial, material and time cost, meet the demand for development of green construction, and overcome the defect of deep basal pit secondary deformation.
In order to solve above-mentioned technical problem, the present invention provides the construction method that in a kind of deep basal pit stage construction, wall and temporary support are removed by stages, comprises the following steps:
Step one, wall by stages of constructing, with wall by stages for border, before carrying out, the Foundation Pit Construction in hole is until completing sole plate, and forms the basement structure in front hole, and before wherein, the basement structure in hole includes at least one of which structural beams；
Step 2, with wall by stages for border, the earth excavation in hole after starting, carry out temporary support construction, the sole plate in hole after completing simultaneously；
The basement structure in hole after the temporary support in hole, construction after step 3, from bottom to top successively dismounting；Offer Chuan Liang hole at each sandwich beam place in front hole corresponding to wall by stages, connected as one by the structural beams of this Chuan Liang hole Jiang Houkeng Yu front hole same layer, form a complete structural beams, until the basement structure in hole after completing；
Step 4, disposable remove wall by stages from top to bottom；
Step 5, complete filling a vacancy of each Rotating fields.
Further, construction method provided by the invention, before wall by stages is removed, support using complete structural beams as the transverse horizontal of deep basal pit, with the construction support replacement during replacing wall by stages to remove.
Further, construction method provided by the invention, in step 4, adopt and successively remove the step of wall by stages along wall total length by stages from top to bottom；After step removed by wall by stages, also include the step that the floor structure in hole, front and back is filled a vacancy, so that the constructing structure that front and back are cheated is linked to be entirety.
Further, construction method provided by the invention, in step 3, construction Chuan Liang hole, hole, front and back structural beams are connected as a single entity and all carry out with the step removing temporary support simultaneously.
Further, construction method provided by the invention, adopt boring machine round on wall by stages to offer Chuan Liang hole, cheat the connection of correspondence position structural beams, the size in Chuan Liang hole for front and back, to meet the reinforcing bar binding of structural beams, the space requirement of formwork erection is as the criterion.
Further, construction method provided by the invention, during cutting disassembling wall by stages, cutting tool is adopted to carry out first crosscut, the more perpendicular sequential steps cut, during crosscut, cut-out direction is set to the cutting of direction, angle of inclination relative to horizontal position, cuts into the block meeting hanging device performance requirement.
Further, construction method provided by the invention, it is additionally included in the step that the metope of wall by stages carries out ruling, to be cut into block along the line；The lines of described line are virtual lines or entity lines.
Further, construction method provided by the invention, the floor structure cheated after being additionally included in and the by stages space of reserved more than 1 meter between wall, the block after wall cutting adopts hanging device to hang out the step removed from space by stages.
Further, construction method provided by the invention, adopt the mode successively filled a vacancy from top to bottom to carry out filling a vacancy of structural beams and flooring；Or the mode of all the other floors carries out structural beams and flooring is filled a vacancy after adopting the first first floor.
Further, construction method provided by the invention, after adopting the first first floor, the mode of all the other floors carries out structural beams and flooring is filled a vacancy in step, first complete initial layer structure, construction site as the ground floor directly over wall by stages, carry out Superstructure Construction, be synchronously performed filling a vacancy of all the other floor structures of underground, to accelerate speed of application.
Compared with prior art, it is connected as one a root architecture beam is integrally formed by offering the front-end geometry beam of hole Jiang Houkeng layer corresponding with front hole at wall by stages, then deep basal pit is defined a support system completed by this root architecture beam, instead of during traditional wall by stages is removed the support replacement technique needing to take, and decrease in traditional demolishing process of wall by stages wall by stages and relative foundation ditch border thereof arrange transverse horizontal support, and removing replacing level in wall region by stages and/or the processing step vertically supported, and form an overall structural beams on foundation ditch border, transverse horizontal supporting role is played in deep basal pit, reduce the secondary deformation of deep basal pit, ensure that the safety of basement structure.After adopting such scheme, wall can disposable overall pulling down by stages, therefore change tradition wall by stages to remove in technique and need wall by stages is layered, in batches, by stages and jump the pattern that storehouse is removed, overcoming in work progress can not the defect removed of fast dismantling, make wall by stages can be removed by the carrying out of disposable unification, efficiency of construction is greatly improved.It addition, the present invention is after the front-end geometry beam of hole, front and back same layer is connected as a root architecture beam, the temporary support in cheating after being simultaneously achieved dismounting, to improve efficiency of construction.Adopt aforesaid way construction method to remove wall and temporary support by stages, not only save artificial and material, decrease the garbage that supporting removal is formed, but also alleviate the impact on environment, meet the demand for development of green construction.
Accompanying drawing explanation
Fig. 1-4 is the work progress schematic diagram of the basement structure of the front and back hole stage construction of one embodiment of the invention；
Fig. 5 is the cross section structure schematic diagram of wall by stages of one embodiment of the invention；
Fig. 6 is the structural representation of one embodiment of the invention wall cutting disassembling by stages；
Fig. 7 is the structural representation of one embodiment of the invention wall transverse cuts by stages；
Fig. 8 is the structural representation that one embodiment of the invention sets up crosshead；
Fig. 9 is the enlarged drawing at A place in Fig. 5；
Figure 10 is the enlarged drawing at B place in Fig. 5.
nullShown in figure: 101、Deep basal pit，101a、Front hole，101b、Rear hole，200、Wall by stages，201、Block，202、Ledgement，203、Vertical moulding，204、Hole for hoist，206、Chuan Liang hole，301、Sole plate，301a、The sole plate in front hole，301b、The sole plate in rear hole，302、Fabric beam，302a、The fabric beam in front hole，302b、The fabric beam in rear hole，303、Interlayer structure beam，303a、The interlayer structure beam in front hole，303b、The interlayer structure beam in rear hole，304、Top level structure beam，304a、The top level structure beam in front hole，304b、The top level structure beam in rear hole，305a、The structural column in front hole，305b、The structural column in rear hole，402b、The bottom temporary support in rear hole，403b、The intermediate layer temporary support in rear hole，404b、The temporary support of the top layer in rear hole，F is transverse cuts face，500、Crosshead，600、Crane，601、Rope.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in detail:
Refer to Fig. 1-5, the present embodiment provides a kind of method of stage construction basement structure before and after deep basal pit, comprises the following steps:
Step one, wall 200 by stages of constructing, with wall 200 by stages for border, the construction of hole 101a before carrying out, the basement structure of hole 101a before being formed, wherein basement structure includes at least one of which structural beams and sole plate 301a；Before wherein, hole 101a is region on the left of wall 200 by stages in Fig. 1-3, and wherein hole 101b is region on the right side of wall by stages afterwards；
Step 2, with the border of wall 200 by stages, cheat the earth excavation of 101b after starting, carry out temporary support construction simultaneously, after completing, cheat the sole plate 301b of 101b；It is connected as complete sole plate 301 by the base plate of foundation pit 301a in front hole and the sole plate 301b in rear hole；
Step 3, the basement structure in hole after the temporary support in hole, construction after successively removing from bottom to top；Chuan Liang hole 206 is offered at each sandwich beam place of the front hole 101a of wall 200 correspondence by stages, by this Chuan Liang hole 206, the structural beams of rear hole 101b with the same layer of front hole 101a correspondence position is connected as one, form a complete sandwich beam, until cheating the basement structure of 101b after completing, to form the basement structure of a complete deep basal pit 101；The basement structure wherein cheating 101b afterwards is corresponding with the basement structure of front hole 101a；It present embodiment is three-decker beam, it is fabric beam 302 respectively, the fabric beam 302a that front hole is corresponding, the fabric beam 302b that rear hole is corresponding, the structural beams 303 in intermediate layer, the interlayer structure beam 303a that front hole is corresponding, the interlayer structure beam 303b that rear hole is corresponding, the structural beams 304 of top layer, the top level structure beam 304a that front hole is corresponding, the top level structure beam 304b that rear hole is corresponding, wherein the structural beams in intermediate layer is not limited to one layer, it is possible to be multilamellar；Corresponding remove after cheat the top layer temporary support 404b in the bottom temporary support 402b in hole after the temporary support of 101b is, the intermediate layer temporary support 403b in rear hole, rear hole；
Step 4, disposable remove wall 200 by stages from top to bottom；Secondly namely first remove wall 200 by stages between the structural beams 304 of top layer and interlayer structure beam 303, remove wall 200 by stages between interlayer structure beam 303 and fabric beam 302, finally remove between fabric beam 302 and sole plate 301 wall 200 by stages.
Step 5, complete filling a vacancy of each Rotating fields.Filling a vacancy of Rotating fields, refers to that the floor structure to hole, front and back carries out filling a vacancy of Rotating fields.
In the present embodiment, after the temporary support in rear hole is removed, when wall 200 is not yet removed by stages, structural beams is cheated in the front and back of residing floor and is connected as a single entity.
In the present embodiment, before wall 200 by stages is removed, also include the transverse horizontal using complete structural beams as deep basal pit and support, with the construction support replacement during replacing wall 200 by stages to remove.Decrease the step that the transverse horizontal arranged between the border that wall 200 by stages is relative with deep basal pit 101 supports, thus reducing the secondary deformation of deep basal pit, it is ensured that the safety of basement structure.Save artificial, material cost, and improve efficiency of construction.
In step 4, adopt and successively remove the step of wall 200 by stages along wall total length by stages from top to bottom；Wherein along wall total length by stages, refer to the width of wall by stages；From top to bottom, the short transverse of wall by stages is referred to；Step removed by wall 200 after by stages, also include the flooring to hole, front and back and structural beams carries out the step filled a vacancy of Rotating fields, so that the constructing structure that front and back are cheated is linked to be entirety.Step removed by the wall by stages 200 of the present embodiment, achieve from lower and under disposable overall pulling down, its overcome in removing wall 200 process by stages tradition wall 200 by stages remove in step jump storehouse, in batches, carry out the defect removed by stages, accelerate the speed of application of basement structure.For example with the method for static(al) cutting, to realize quickly removing wall 200 by stages.And it can reduce to the vibration of surrounding enviroment and sound pollution in demolishing process, and decreases dust emission.
Refer to Fig. 5, Fig. 9, Figure 10, in step 3, construction Chuan Liang hole 206, hole, front and back structural beams are connected as a single entity and are all synchronously performed with the step removing temporary support.Adopting boring machine round on wall 200 by stages to offer Chuan Liang hole 206, cheat the connection of correspondence position structural beams, the size in Chuan Liang hole 206 for front and back, to meet the reinforcing bar binding of structural beams, the space requirement of formwork erection is as the criterion.By this Chuan Liang hole 206, each sandwich beam of rear hole 101b with front hole 101a correspondence position is connected as one, form a complete structural beams.This complete structural beams has and guarantees the power transmission requirement to Water And Earth Pressures.Wall 200 demolishing process by stages adopt a complete structural beams support as force transferring structure as permanent structure beam, avoid the shortcoming that in the past must be provided with temporary support when removing at wall 200 by stages, save a large amount of temporary support material, also reduce because temporary support removes the solid waste produced, also reduce because changing the defect supporting the foundation ditch secondary deformation caused simultaneously, alleviate the impact on surrounding.The construction in Chuan Liang hole 206 can adopt two ways, refer to Fig. 9, and top level structure beam 304 can adopt the cutting tool such as cutting knife or saw blade form Chuan Liang hole 206.Owing to space is left on the top of top level structure beam 304, cutting can be stretched into and carry out construction formation Chuan Liang hole 206.It has the advantage that speed of application is fast.Refer to Figure 10, the mode that boring machine round punches can be adopted to form Chuan Liang hole 206 interlayer structure beam 304 and fabric beam 302, owing to interlayer structure beam 304 and fabric beam 302 do not have headspace, cutting knife cannot be directly protruding into and wherein construct, and adopts the mode that boring machine round punches just can realize offering the purpose in Chuan Liang hole 206.Of course for rapid construction, it would however also be possible to employ the boring machine round mode being combined with cutting knife that punches carries out, for instance adopt boring machine round to punch after certain distance, insert cutting knife and carry out cutting and form Chuan Liang hole 206.Namely the structural beams in the basement structure in the rear hole of the present embodiment is three layers, from bottom to top successively construction layer structural beams, successively removes the temporary support in respective layer from bottom to top simultaneously.It can be connect round that round punches, it is also possible to be interval round.
Refer to Fig. 7, in order to occur blocking the defect of cutting utensil when preventing cutting disassembling wall 200 by stages, the cutting knife of such as cutting tool is stuck in the defect in body of wall, the method of stage construction basement structure before and after the deep basal pit of the present embodiment, during cutting disassembling wall 200 by stages, the cutting tool elder generation crosscuts such as saw blade, the more perpendicular sequential steps cut is adopted to carry out.For removing of the block after convenient cutting, during crosscut, cut-out direction is set to the cutting of direction, angle of inclination relative to horizontal position, cuts into the block meeting hanging device performance requirement.It is to say, the transverse cuts face F of wall 200 is inclined-plane by stages.
Refer to Fig. 6, as preferably embodiment, the construction method of the present embodiment, be additionally included in the step that the metope of wall 200 by stages carries out ruling, to cut block 201 along the line.Wherein, the lines of line are entity lines or virtual lines.Wherein the line of entity lines can adopt ink fountain snap the line or marker pen to rule.The hatched manner of ink fountain snap the line has advantage fast and easily, it is possible to reduce the measurement of the position before line or distance.Marker pen is scribed ss and is capable of present embodiment and marks the mode of entity lines.Wherein, the line of virtual lines can adopt the virtual lines that the mode that laser irradiates is rule.The advantage that virtual lines have repeatable utilization, it is possible to laser equipment is modulated to the lines intersected pre-set body of wall 200 is projected, so that virtual lines are mapped on the metope of body of wall 200.The lines rule in present embodiment preferably employ the mode of ledgement 202 and vertical moulding 203 and rule.Can certainly adopt and intersect the mode of the lines being other intersections such as 45 degree respectively and rule.First rule and cut again, it is simple to control the overall pulling down engineering time of wall 200 by stages, it is simple to construct according to plan, and ensure that the size requirement less than lifting weight of each block 201.
In the present embodiment, the structural beams in hole and the space of reserved more than 1 meter between wall 200 by stages after being additionally included in, by stages wall 200 cut after block 201 adopt crane 600 hanging device such as grade to hang out the step removed from space.Such as being sling by block 201 after removing to haulage vehicle, away from construction area, collection site is specified in transport.Space has the effect facilitating block 201 to remove, and is the distance of about 1 meter, but the distance in its space is not limited to this in general construction operation, can need to be adjusted correspondingly according to practice of construction.
In the present embodiment, the mode successively filled a vacancy from top to bottom is adopted to carry out filling a vacancy of structural beams and flooring；Or the mode of all the other floors carries out structural beams and flooring is filled a vacancy after adopting the first first floor.After adopting the first first floor, the mode of all the other floors carries out structural beams and flooring is filled a vacancy in step, first complete initial layer structure, as the construction site of the ground floor directly over wall by stages, carry out Superstructure Construction, it is synchronously performed filling a vacancy of all the other floor structures of underground, to accelerate speed of application.
Refer to Fig. 6, as preferably embodiment, the method of stage construction basement structure before and after the deep basal pit of the present embodiment, before lifting, be additionally included in each block 201 region bore hole for hoist 204 step, after being connected with crane by rope 601 grade with crane 600 hanging device such as grade by hole for hoist 204, block 201 lifting is removed.The hole for hoist 204 of present embodiment is no less than two, it is possible to be odd number, it is also possible to be even number.
In present embodiment, the shape of line can be that the polygon mat such as triangle, tetragon or circular block and its combine, and present embodiment preferably employs tetragon, namely draws ledgement 202 and vertical moulding 203 that horizontal and vertical intersects, especially square.As long as this blocks mobile can conveniently be cut, it is possible to according to removing the selection that space carries out adapting to.
Refer to Fig. 8, as preferably embodiment, the present embodiment deep basal pit before and after the method for stage construction basement structure, the wherein side being additionally included in wall 200 by stages arranges the step of crosshead 500, to facilitate cutting and to remove the construction of operation.Crosshead 500 adopts monoblock type scaffold board, and it has the effect being prevented from pendant thing, particularly in subterranean excavation engineering, it is possible to the adverse effect that effective anti-falling stop thing directly drops the sole plate to foundation ditch or its collision rift is produced by structure floor.
As preferably embodiment, the method for stage construction basement structure before and after the deep basal pit of the present embodiment, the step of each layer basement floor structure that also include constructing.Additionally, cheat in front and back after the structural beams of every layer constructed, it is additionally included between sole plate 301 and fabric beam 302, fabric beam 302 and interlayer structure beam 303, interlayer structure beam 302 and top level structure beam 303 and is respectively arranged with structural column 305, including the structural column 305b of the structural column 305a in front hole and rear hole, to meet the vertical supporting of basement structure.
The present invention is with wall 200 by stages for border, and the construction of hole 101a before carrying out, the basement structure of hole 101a before being formed, wherein basement structure includes at least one of which structural beams and sole plate.Namely to form at least one of which structural beams between the border of wall 200 by stages and its relative front 101a border, hole or the enclosure wall on border, and before the bottom of front hole 101a is formed, the sole plate of 101a is cheated.Structural beams can be two layers, three layers, the multiple structures such as four layers.
The invention is not restricted to above-mentioned detailed description of the invention, all various changes done within the spirit and scope of the present invention, all within protection scope of the present invention.
Claims (10)
1. the construction method that in a deep basal pit stage construction, wall and temporary support are removed by stages, it is characterised in that comprise the following steps:
Step one, wall by stages of constructing, with wall by stages for border, before carrying out, the Foundation Pit Construction in hole is until completing sole plate, and forms the basement structure in front hole, and before wherein, the basement structure in hole includes at least one of which structural beams；
Step 2, with wall by stages for border, the earth excavation in hole after starting, carry out temporary support construction, the sole plate in hole after completing simultaneously；
The basement structure in hole after the temporary support in hole, construction after step 3, from bottom to top successively dismounting；Offer Chuan Liang hole at each sandwich beam place in front hole corresponding to wall by stages, connected as one by the structural beams of this Chuan Liang hole Jiang Houkeng Yu front hole same layer, form a complete structural beams, until the basement structure in hole after completing；
Step 4, disposable remove wall by stages from top to bottom；
Step 5, complete filling a vacancy of each Rotating fields.
2. construction method as claimed in claim 1, it is characterised in that before wall by stages is removed, support using complete structural beams as the transverse horizontal of deep basal pit, with the construction support replacement during replacing wall by stages to remove.
3. construction method as claimed in claim 1, it is characterised in that in step 4, adopt and successively remove the step of wall by stages along wall total length by stages from top to bottom；After step removed by wall by stages, also include the step that the floor structure in hole, front and back is filled a vacancy, so that the constructing structure that front and back are cheated is linked to be entirety.
4. construction method as claimed in claim 1, it is characterised in that in step 3, construction Chuan Liang hole, hole, front and back structural beams are connected as a single entity and all carry out with the step removing temporary support simultaneously.
5. construction method as claimed in claim 1, it is characterized in that, adopt boring machine round on wall by stages to offer Chuan Liang hole, cheat the connection of correspondence position structural beams for front and back, the size in Chuan Liang hole, to meet the reinforcing bar binding of structural beams, the space requirement of formwork erection is as the criterion.
6. construction method as claimed in claim 1, it is characterised in that during cutting disassembling wall by stages, cutting tool is adopted to carry out first crosscut, the more perpendicular sequential steps cut, during crosscut, cut-out direction is set to the cutting of direction, angle of inclination relative to horizontal position, cuts into the block meeting hanging device performance requirement.
7. construction method as claimed in claim 1, it is characterised in that be additionally included in the step that the metope of wall by stages carries out ruling, to be cut into block along the line；The lines of described line are virtual lines or entity lines.
8. construction method as claimed in claim 1, it is characterised in that the floor structure in hole and the space of reserved more than 1 meter between wall by stages after being additionally included in, the block employing hanging device after wall cutting hangs out the step removed from space by stages.
9. construction method as claimed in claim 1, it is characterised in that adopt the mode successively filled a vacancy from top to bottom to carry out filling a vacancy of structural beams and flooring；Or the mode of all the other floors carries out filling a vacancy of structural beams and flooring after adopting the first first floor.
10. construction method as claimed in claim 9, it is characterized in that, after adopting the first first floor, the mode of all the other floors carries out structural beams and flooring is filled a vacancy in step, first complete initial layer structure, construction site as the ground floor directly over wall by stages, carry out Superstructure Construction, be synchronously performed filling a vacancy of all the other floor structures of underground, to accelerate speed of application.
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| CN111945743A (en) * | 2020-08-15 | 2020-11-17 | 中铁十一局集团第一工程有限公司 | Multi-layer unbalanced foundation pit supporting method suitable for staged excavation |
| CN112575812A (en) * | 2020-12-01 | 2021-03-30 | 中国建筑第二工程局有限公司 | Inner support conversion system applied to demolition and transformation project and construction method thereof |
| CN112575812B (en) * | 2020-12-01 | 2022-05-24 | 中国建筑第二工程局有限公司 | Inner support conversion system applied to demolition and transformation project and construction method thereof |
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