CN105133623B - A kind of construction method that supporting is carried out using prestress steel sheet pile supporting construction - Google Patents
A kind of construction method that supporting is carried out using prestress steel sheet pile supporting construction Download PDFInfo
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- CN105133623B CN105133623B CN201510619464.5A CN201510619464A CN105133623B CN 105133623 B CN105133623 B CN 105133623B CN 201510619464 A CN201510619464 A CN 201510619464A CN 105133623 B CN105133623 B CN 105133623B
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Abstract
The invention discloses a kind of construction method that supporting is carried out using prestress steel sheet pile supporting construction, prestress steel sheet pile supporting construction includes multiple prestressing force supporting units, and each prestressing force supporting unit includes support pile, multiple bridle irons and presstressed reinforcing steel.Support pile is vertically arranged in the side for treating excavation pit, and multiple bridle irons are arranged on support pile from top to bottom, and one end of presstressed reinforcing steel is anchored in the bottom of support pile.Multiple prestressing force supporting units are squeezed into the surrounding for treating excavation pit successively, multiple bridle irons towards excavation pit is treated, Guan Liang are set on the top of prestressing force supporting unit, prestressing force supporting unit is formed entirety with Guan Liang；Pulling force is applied by presstressed reinforcing steel, the upper end of prestressing force presstressed reinforcing steel is anchored in Guan Liang.The horizontal component of pulling force suffered by presstressed reinforcing steel is delivered to supporting construction, counteracts the part soil pressure of the soil body, improves supporting intensity, reduces the deformation of support pile；In addition, supporting construction can be reclaimed reuse, it is cost-effective.
Description
Technical field
The invention belongs to building field, and in particular to a kind of construction that supporting is carried out using prestress steel sheet pile supporting construction
Method.
Background technology
In Extra-Deep Foundation Pit, existing fender post generally uses cast-in-situ bored pile or driven cast-in-place pile, and takes
The construction method of cast in situs.Such as application number 201420330061.X, entitled cast-type external prestressing steel tube concrete
Native stake and the utility model patent of supporting piling wall, including steel pipe, in the cast-in-place concrete layer of the steel duct and setting
The many presstressed reinforcing steels on the steel pipe, presstressed reinforcing steel is set along the axis direction of steel pipe, including top section, interlude and bottom
Section, the interlude is located at steel pipe outside, and top section and bottom section enter steel pipe inner side through steel pipe tube wall, and the upper end of the steel pipe is opened
Mouthful, there is an enclosed construction on bottom.Present invention also offers the supporting piling wall with foregoing concrete-pile.The invention it is cast-in-place
Formula external prestressing steel tube concrete pile uses external prestressing technique, preferably can enter row constraint to pile body, there is provided tension
Power, effectively limits deformation of the supporting piling wall in Excavation Process.The utility model of application number 201420720609.1
Patent, discloses a kind of from anchoring prestress support pile, including concrete pile body, and the concrete pile body inside has at least one
Root presstressed reinforcing steel, the presstressed reinforcing steel is included near pile body bottom from anchoring bond section and the non-adherent near pile body top
Section, the non-adherent section is outside to be coated with a pre-buried flexible pipe, and connection, institute are tightened between the pre-buried flexible pipe bottom and presstressed reinforcing steel
State presstressed reinforcing steel and pre-buried flexible pipe passes concrete pile body upwards, the presstressed reinforcing steel bottom extends to concrete pile body bottom
Portion.Through the above way, the present invention is simple and reasonable, by being provided from the bond stress between anchoring bond section and concrete
Anchor force during prestress application, it is not necessary to prestress application is carried out by installing anchored end anchorage, it is more convenient.But
The cast-type stake must can excavate foundation trench after concrete reaches intensity requirement, and efficiency of construction is relatively low, and for moisture content
Construction environment higher, pouring stake can not play waterproof action.
For the aqueous many construction environments of soil mass of foundation pit, the lateral pressure and only that cofferdam stops the soil body is formed using steel sheet pile more
Water, steel sheet pile is hot rolling (or clod wash) shaped steel of a kind of belt lock catch or jaw, and occlusion is connected with each other by lock or jaw after squeezing into,
Continuous steel sheet pile enclosure wall is formed, for earth-retaining and dash.With quick construction, simple, recycling, better economy etc.
Feature.Such as the patent of invention of application number 201310010389.3, a kind of steel sheet pile being connected by screw bolts and H profile steel group are disclosed
Close foundation pit supporting construction, including the steel sheet pile for foundation ditch sealing, the H profile steel for foundation ditch earth-retaining, two neighboring steel sheet pile it
Between be connected with each other by U-shaped fastener, between steel sheet pile and H profile steel by fixing bolt connect.The invention realizes good integrity,
Rigidity is big, can give full play to the advantage of steel sheet pile, H profile steel, can be while earth-retaining sealing, is readily disassembled after the completion of construction.But
With the excavation of foundation ditch, the pressure of the soil body is incrementally increased suffered by support pile, to prevent foundation pit side-wall soil deformation excessive, influence branch
Protection structure stability is, it is necessary to set multiple tracks support, construction is cumbersome, and construction costs is high.
The utility model patent of application number 201420639760.2, discloses a kind of recyclable pre- based on prestressing technique
Stress rib abnormity support pile, including concrete pile body, the concrete pile body inside have at least one built-in pipe, described pre-buried
Pipe is u-shaped, and concrete pile body bottom is located at the bottom fold of the built-in pipe, and two ends of the built-in pipe pass mixed
The top of solidifying soil pile body, is equipped with U-shaped prestressing force presstressed reinforcing steel in the built-in pipe.Complete to lead in pile body by such scheme
After syllabus, stretching end prestressing force is discharged, presstressed reinforcing steel can be easily drawn out by mechanical force, reach the purpose of recovery.
But this kind of support pile has the following disadvantages：1) presstressed reinforcing steel, can only be reclaimed, and support pile sheet is basic in completing
After construction and without recovery value；2), with the excavation of foundation ditch, the pressure of the soil body is incrementally increased suffered by supporting construction, is anti-
Only foundation pit side-wall soil deformation is excessive, influences supporting construction stability, it is necessary to set one or multi-channel support, constructs cumbersome,
And construction costs is high.If prestressing force can be applied to supporting construction, it is produced the stress outside to hole, offset part soil pressure, then
External force suffered by supporting construction will be significantly reduced, and reach the purpose for reducing arrangement support.
The content of the invention
It is an object of the invention to provide a kind of construction method that supporting is carried out using prestress steel sheet pile supporting construction, solution
Certainly deep foundation pit supporting structure stability is poor in the prior art, support tedious process, unhandy technical problem.
In order to solve the above-mentioned technical problem, the present invention is achieved through the following technical solutions：
A kind of prestress steel sheet pile supporting construction, including multiple prestressing force supporting units and Guan Liang, the Guan Liang are arranged on
The upper end of prestressing force supporting unit, and multiple prestressing force supporting units are fixed together.
Each prestressing force supporting unit includes support pile, multiple bridle irons and presstressed reinforcing steel, and the support pile is steel sheet pile；
The bridle iron is vertically set on support pile from top to bottom, and bridle iron is arranged at support pile towards the side at foundation ditch center,
The length of the bridle iron is first incremented by from top to bottom successively decreases afterwards, and the end of all bridle irons is provided with stopping means, the steel
Bearing is H profile steel；The presstressed reinforcing steel passes sequentially through the stopping means on all bridle irons, and one end of presstressed reinforcing steel is anchored in branch
The bottom of fender pile, the other end is anchored in the Guan Liang of support pile upper end, and the presstressed reinforcing steel is domed under bridle iron support；It is logical
Setting stopping means is crossed so that every presstressed reinforcing steel will not be interfered during prestressing force is applied, it is ensured that whole supporting construction
Stability.The bridle iron is H profile steel, and the H profile steel edge of a wing is wide, lateral rigidity is big, bending resistance is strong, prevents from applying prestressing force
During bridle iron deformation, improve the rigidity and stability of whole supporting construction.
At least a piece of steel sheet pile is connected between the adjacent supporting unit, all steel sheet piles of supporting construction is linked to be one
Individual entirety, enhances the globality of supporting construction, improves supporting intensity, while the cofferdam that steel sheet pile is formed can play waterproof
Effect；In addition, steel plate dowel section area is small, hard soil layer is easily squeezed into.
Further improve, three or five or seven bridle irons are provided with described each support pile.Phase on each support pile
The spacing of adjacent bridle iron is 1-3m.The bridle iron length positioned at support pile short transverse centre position is 0.5-0.9m.Institute
The length for stating support pile is 15m-30m.Geologic information, design of foundation pit depth and surrounding enviroment according to excavation pit is treated determine branch
Fender pile length, spacing and supporting construction arrangement etc., the length of design of foundation pit depth more ramus profundus fender pile is more long, and the quantity of bridle iron is got over
Many, the length of bridle iron most long is more long.
Further improve, according to the geologic information for treating excavation pit, determine presstressed reinforcing steel on each prestressing force supporting unit
Quantity, the quantity of presstressed reinforcing steel is 3-5 roots on each prestressing force supporting unit, and design of foundation pit depth is deeper, each prestressing force
The quantity of presstressed reinforcing steel is more on supporting unit.
Further improve, multiple bridle irons on described each support pile spaced set from top to bottom increases prestressing force
The rigidity of supporting unit.
Further improve, the surface that the stopping means is in contact with presstressed reinforcing steel is arc, reduce presstressed reinforcing steel with limit
The friction of position device, reduces abrasion, improves the service life of presstressed reinforcing steel.
Further improve, the bridle iron is connected by welding with support pile, increase bridle iron strong with the connection of support pile
Degree, it is ensured that the stability of whole supporting construction.
Further improve, multiple is provided with the web of the H profile steel of the support pile and bridle iron and is put more energy into floor, improve branch
The stability of protection structure.
A kind of construction method that supporting is carried out using prestress steel sheet pile supporting construction, is comprised the following steps：
Step one, precast prestressed supporting unit：According to the projected depth for treating excavation pit, select support pile length and
The spacing of the quantity of bridle iron and adjacent bridle iron on each support pile, the length of support pile is 1.4-2.0 times of foundation depth,
Bridle iron is three or five or seven on each support pile, and the spacing of adjacent bridle iron is 1-3m on each support pile, upper
In the range of stating, and under the conditions of identical geology, increase with the length that design of foundation pit depth increases support pile, on each support pile
The quantity of bridle iron increase, selected support pile is fixedly connected with bridle iron, one end of presstressed reinforcing steel is anchored in support pile
Bottom, the other end of presstressed reinforcing steel passes sequentially through the stopping means on all bridle irons.
Step 2, multiple prestressing force supporting units are squeezed into the surrounding for treating excavation pit, supporting successively using pile driving equipment
Stake sets the side of bridle iron towards foundation ditch center.Deeply treat below the bottom of excavation pit hole the lower end of support pile, it is ensured that applying
During Prestressing, the bottom of foundation ditch soil body improves the stability of support pile to the supporting role of support pile lower end.
Step 3, at least one steel sheet pile is squeezed between adjacent prestressing force supporting unit using pile driving equipment, steel plate
By latching connection between stake and steel sheet pile or prestressing force supporting unit, all prestressing force supporting units are made to connect by with steel sheet pile
Connect to form cofferdam, can effectively prevent foundation ditch from seeping water.
Step 4, the top setting Guan Liang in prestressing force supporting unit, are consolidated all prestressing force supporting units by Guan Liang
Surely link together；So that all prestressing force supporting units form an entirety with Guan Liang, it is ensured that entirely supporting construction is steady
It is qualitative.
Step 5, by prestress application device to presstressed reinforcing steel apply pulling force, it is ensured that each prestressing force supporting unit
Many presstressed reinforcing steels are subject to identical pulling force, and the upper end of prestressing force presstressed reinforcing steel is anchored in Guan Liang.
Step 6, excavation of foundation pit is carried out, and as the increase of excavation of foundation pit depth steps up presstressed reinforcing steel prestressing force, base
Hole is excavated during to hole bottom, and prestressing force presstressed reinforcing steel upper end is anchored in Guan Liang.With the increase of excavation of foundation pit depth, foundation ditch side
The lateral pressure increase of the wall soil body, then need to step up lateral pressure of the presstressed reinforcing steel prestressing force to resist soil mass of foundation pit.
Step 7, carry out Underground Construction.
Step 8, Underground Construction backfill the earthwork after finishing, remove supporting construction, and then release presstressed reinforcing steel is pre- successively
Stress, remove Guan Liang, using pile pulling device reclaim prestressing force supporting unit.
Further improve, the step 4 sets at least one and supports in Guan Liang after completing towards the side at foundation ditch center
Structure.When foundation ditch is one side supporting, the other end of supporting construction is supported on the soil body of foundation ditch another side；When foundation ditch is two-sided
When supporting or three face supportings or four sides supporting, the other end of supporting construction is supported in the Guan Liang of foundation ditch another side, by setting
Supporting construction resists the lateral pressure of foundation ditch soil at both sides, further improves the supporting effect of supporting construction.
Because the length of the multiple bridle irons on each support pile is first incremented by from top to bottom successively decreasing afterwards, presstressed reinforcing steel stress
Curved after tight, then the horizontal component of pulling force suffered by presstressed reinforcing steel is applied to support pile, equivalent to support pile to foundation pit side-wall soil
Body applies outside thrust, and the lateral pressure of the soil body has been resisted well, reduces the quantity of supporting construction, cost-effective.And with
The length for bridle iron most long is more long, and presstressed reinforcing steel is bigger with the angle of support pile, then the level of pulling force suffered by presstressed reinforcing steel point
Amount is bigger, and the resistance to the foundation pit side-wall soil body is bigger.Further, since being provided with multiple bridle irons on each support pile so that
Support pile intensity in itself is improved, and can effectively prevent support pile and become because the lateral pressure of prestressing force or the soil body is applied
Shape.
Compared with prior art, the beneficial effects of the invention are as follows：
1st, prestress steel sheet pile supporting construction of the present invention and its construction method, by support pile set bridle iron and
Presstressed reinforcing steel, curved after the tensioning of presstressed reinforcing steel stress, then the horizontal component of pulling force suffered by presstressed reinforcing steel is applied to support pile, phase
When outside thrust is applied to the foundation pit side-wall soil body in support pile, then the lateral pressure of the soil body is resisted, improve supporting intensity.
2nd, prestress steel sheet pile supporting construction of the present invention and its construction method, prestressing force is applied by presstressed reinforcing steel
To resist the lateral pressure of the foundation pit side-wall soil body, the quantity of support is reduced.
3rd, prestress steel sheet pile supporting construction of the present invention and its construction method, bridle iron are H profile steel, the H profile steel edge of a wing
Wide, lateral rigidity is big, bending resistance is strong, prevents the bridle iron during prestressing force is applied from deforming, and improves whole supporting construction
Rigidity and stability；Steel sheet pile intensity is high, and sectional area is small, easily squeezes into hard soil layer, and steel sheet pile cross-sectional width is big, it is ensured that
The mechanical property in section is fully played, and the lateral pressure of soil mass of foundation pit is resisted well.
4th, prestress steel sheet pile supporting construction of the present invention and its construction method, stopping means and prestressing force presstressed reinforcing steel
The surface being in contact is arc-shaped curved surface, reduces the friction of presstressed reinforcing steel and stopping means, reduces abrasion, improves making for presstressed reinforcing steel
Use the life-span.
5th, prestress steel sheet pile supporting construction of the present invention and its construction method, provide according to the geology for treating excavation pit
Material, foundation depth and surrounding enviroment are determined between the length of support pile, the quantity of bridle iron, the length of bridle iron and bridle iron
Away from easy to operate.
6th, prestress steel sheet pile supporting construction of the present invention and its construction method, it is the piling bar of supporting unit, bridle iron, pre-
Stress rib and presstressed reinforcing steel can be prefabricated in the factory with the anchoring of support pile bottom, assemble, and the scene of being transported to can directly be squeezed into, and make
Can be reclaimed after the completion of, reused, it is cost-effective.
Brief description of the drawings
Fig. 1 is a kind of prestress steel sheet pile supporting construction containing three schematic diagrames of bridle iron.
Fig. 2 is the side view of bridle iron.
Fig. 3 is a kind of prestress steel sheet pile supporting construction containing five schematic diagrames of bridle iron.
Fig. 4 is the top view of Fig. 3
Fig. 5 is a kind of prestress steel sheet pile supporting construction containing seven schematic diagrames of bridle iron.
Fig. 6 is a kind of schematic diagram of prestress steel sheet pile supporting construction containing three bridle irons and supporting construction.
Specific embodiment
To make the purpose of the present invention and technical scheme clearer, below in conjunction with the embodiment of the present invention to skill of the invention
Art scheme is clearly and completely described.
As Figure 1-3, a kind of prestress steel sheet pile supporting construction, including multiple prestressing force supporting units, it is the multiple
Prestressing force supporting unit is connected together by being fixed thereon the Guan Liang 2 at end.Described each prestressing force supporting unit includes supporting
Stake 1, multiple bridle irons 3 and presstressed reinforcing steel 4, support pile 1 are vertically arranged in the side for treating excavation pit, the lower end depth of support pile 1
Enter below Foundation Pit bottom, support pile 1 is H profile steel or steel sheet pile, bridle iron 3 is H profile steel；The multiple bridle iron 3 is from top to bottom
It is vertically set on support pile 1, multiple bridle irons 3 towards excavation pit is treated, first pass from top to bottom by the length of multiple bridle irons 3
Successively decrease after increasing；The end of the multiple bridle iron 3 is provided with stopping means 5；Presstressed reinforcing steel 4 passes sequentially through all bridle irons 3
On stopping means 5, one end of presstressed reinforcing steel 4 is anchored in the bottom of support pile 1, and the other end is anchored on the hat of the upper end of support pile 1
On beam 2.At least a piece of steel sheet pile is connected between the adjacent supporting unit.
The method constructed using above-mentioned prestress steel sheet pile supporting construction, is comprised the following steps：
Step one, according to treat excavation pit geologic information, dig depth and surrounding enviroment condition determine support pile 1 length,
The quantity of bridle iron 3, the length of bridle iron 3 and on each prestressing force supporting unit adjacent bridle iron 3 spacing, by prestressing force
One end of muscle 4 is anchored in the bottom of support pile 1, and the other end of presstressed reinforcing steel passes sequentially through the stopping means on all bridle irons 3
5, precast prestressed supporting unit.
Step 2, multiple prestressing force supporting units are squeezed into the surrounding for treating excavation pit, steel branch successively using pile driving equipment
The direction of seat 3 treats excavation pit；The lower end of support pile 1 is goed deep into below Foundation Pit bottom, it is ensured that apply prestressing force to presstressed reinforcing steel 4
When, the bottom of foundation ditch soil body is played a supporting role to the lower end of support pile 1, improves the stability of support pile 1.
Step 3, at least one steel sheet pile is squeezed between adjacent prestressing force supporting unit using pile driving equipment, steel plate
By latching connection between stake and steel sheet pile or prestressing force supporting unit, all prestressing force supporting units are made to connect by with steel sheet pile
Connect to form cofferdam, can effectively prevent foundation ditch from seeping water.
Step 4, Guan Liang 2 is set on the top of prestressing force supporting unit, by Guan Liang 2 by all prestressing force supporting units
It is fixed together；So that all prestressing force supporting units form an entirety with Guan Liang 2, it is ensured that whole supporting construction
Stability.
Step 5, by prestress application device to presstressed reinforcing steel 4 apply prestressing force, tensioned prestressing bar 4, it is ensured that each
Many prestressing force presstressed reinforcing steels 4 of prestressing force supporting unit are subject to identical pulling force, and the upper end of prestressing force presstressed reinforcing steel 4 is anchored
In Guan Liang 2.
Step 6, carry out excavation of foundation pit, and with the increase of excavation of foundation pit depth steps up the pre- of presstressed reinforcing steel 4 should
Power, when excavation of foundation pit is to hole bottom, the upper end of prestressing force presstressed reinforcing steel 4 is anchored in Guan Liang.With the increase of excavation of foundation pit depth,
The lateral pressure increase of the foundation pit side-wall soil body, then need to step up lateral pressure of the prestressing force of presstressed reinforcing steel 4 to resist soil mass of foundation pit.
Step 7, Underground Construction is carried out, complete the construction such as base plate, side wall, middle plate, top board, support replacement, underground waterproof.
Step 8, backfill support pile 1 and the interpore earthwork of outer wall of basement, then discharge the pre- of presstressed reinforcing steel 4 successively
Stress, dismounting Guan Liang 2, recovery supporting construction.Supporting construction is reclaimed to reuse, it is cost-effective.
The length of the multiple bridle irons 3 on each support pile 1 is first incremented by from top to bottom successively decreases afterwards, the stress of presstressed reinforcing steel 4
Curved after tight, then the horizontal component of suffered pulling force is applied to support pile 1 by prestressing force presstressed reinforcing steel 4, equivalent to support pile 1 pair
The foundation pit side-wall soil body applies outside thrust, and the lateral pressure of the soil body has been resisted well, reduces the quantity of supporting construction 6, saves
About cost.Further, since being provided with multiple bridle irons 3 on each support pile 1 so that support pile 1 intensity of itself is improved,
Support pile 1 can effectively be prevented and deformed because the lateral pressure of prestressing force or the soil body is applied.
Embodiment one：
Geologic information, digging depth and surrounding enviroment condition according to excavation pit is treated determine the length of support pile 1, bridle iron 3
Quantity, on the length of bridle iron 3 and each prestressing force supporting unit adjacent bridle iron 3 spacing, by the one of presstressed reinforcing steel 4
End is anchored in the bottom of support pile 1, and the other end of presstressed reinforcing steel passes sequentially through the stopping means 5 on all bridle irons 3, prefabricated pre-
Stress supporting unit.
As shown in figure 1, the length of the support pile 1 is 15m, excavation of foundation pit depth 10m, connected between adjacent supporting unit
There are two steel sheet piles, whole supporting construction forms a cofferdam.Three bridle irons 3, each supporting are provided with each support pile 1
The maximum of the spacing of adjacent bridle iron 3 is 3m in stake 1, and minimum value is 1m, and the length of bridle iron 3 most long is 0.5m, it is described each
Three prestressing force presstressed reinforcing steels 4 are provided with prestressing force supporting unit, the nominal diameter of every prestressing force presstressed reinforcing steel 4 is
15.2mm, support pile 1 deeply cheats 5m below bottom.
Embodiment two：
As shown in figure 4, the length of the support pile 1 is 18m, excavation of foundation pit depth 12m, connected between adjacent supporting unit
There is a steel sheet pile, whole supporting construction forms a cofferdam.Five bridle irons 3, each supporting are provided with each support pile 1
The maximum of the spacing of adjacent bridle iron 3 is 3m in stake 1, and minimum value is 1m, and the length of bridle iron 3 most long is 0.7m, each it is pre- should
Four prestressing force presstressed reinforcing steels 4 are provided with power supporting unit, the every nominal diameter of prestressing force presstressed reinforcing steel 4 is 15.2mm,
Support pile 1 deeply cheats 6m below bottom.
Embodiment three：
As shown in figure 5, the length of the support pile 1 is 30m, excavation of foundation pit depth 15m, connected between adjacent supporting unit
There is a steel sheet pile, whole supporting construction forms a cofferdam.Seven bridle irons 3, each supporting are provided with each support pile 1
The maximum of the spacing of adjacent bridle iron 3 is 3m in stake 1, and minimum value is 1m, and the length of bridle iron 3 most long is 0.9m, each it is pre- should
Five prestressing force presstressed reinforcing steels 4 are provided with power supporting unit, the every nominal diameter of prestressing force presstressed reinforcing steel 4 is 15.2mm,
Support pile 1 deeply cheats 15m below bottom.
Example IV：
As shown in fig. 6, further being improved on the basis of embodiment one, the Guan Liang 2 sets towards the side at foundation ditch center
A supporting construction 6 is equipped with, foundation ditch is four sides supporting, and the other end of supporting construction 6 is supported in the Guan Liang 2 of foundation ditch another side,
The lateral pressure of foundation ditch soil at both sides is resisted by setting supporting construction 6, the supporting effect of supporting construction is further improved.Other knots
Structure or step are identical with embodiment one.
Do not done in the present invention illustrate be prior art or be capable of achieving by prior art, and the present invention
Described in specific implementation case be only preferable case study on implementation of the invention, not for limiting practical range of the invention.
The equivalence changes that i.e. all contents according to scope of the present invention patent are made and modification, all should be used as technology category of the invention.
Claims (5)
1. a kind of construction method that supporting is carried out using prestress steel sheet pile supporting construction, it is characterised in that the prestress steel
Sheet pile supporting construction includes multiple prestressing force supporting units and Guan Liang (2), and the Guan Liang (2) is arranged on prestressing force supporting unit
Upper end, and multiple prestressing force supporting units are fixed together；At least a piece of steel sheet pile is connected between adjacent supporting unit, is made
All steel sheet piles of supporting construction are linked to be an entirety；
Each prestressing force supporting unit includes：
Support pile (1), the support pile (1) is steel sheet pile；
Multiple bridle irons (3), the bridle iron (3) is vertically set on support pile from top to bottom, and the quantity of bridle iron (3) is three
It is individual or five or seven, and bridle iron (3) is arranged at side of the support pile (1) towards foundation ditch center, the length of the bridle iron (3)
Degree is first incremented by successively decreases afterwards from top to bottom, and the spacing of adjacent bridle iron (3) is 1-3m, wherein the length of bridle iron (3) most long is
0.5-0.9m；The end of all bridle irons (3) is provided with stopping means (5)；The bridle iron (3) is H profile steel；
Presstressed reinforcing steel (4), the presstressed reinforcing steel (4) passes sequentially through the stopping means (5) on all bridle irons (3), presstressed reinforcing steel
(4) one end is anchored in the bottom of support pile (1), and the other end is anchored in the Guan Liang (2) of support pile (1) upper end, it is described it is pre- should
Power muscle (4) is domed under bridle iron (3) support；
The construction method for carrying out supporting using above-mentioned prestress steel sheet pile supporting construction is comprised the following steps：
Step one, precast prestressed supporting unit：According to the projected depth for treating excavation pit, select support pile (1) length and
The quantity of bridle iron (3) on each support pile (1), the length of support pile (1) is 1.4-2.0 times of foundation depth, each support pile
(1) bridle iron (3) is three or five or seven on, and the spacing of adjacent bridle iron (3) is 1-3m on each support pile (1), will
Selected support pile (1) is fixedly connected with bridle iron (3), and one end of presstressed reinforcing steel (4) is anchored in the bottom of support pile (1), in advance
The other end of stress rib (4) passes sequentially through the stopping means (5) on all bridle irons (3)；
Step 2, multiple prestressing force supporting units are squeezed into the surrounding for treating excavation pit, support pile (1) successively using pile driving equipment
The side of bridle iron (3) is set towards foundation ditch center；
Step 3, at least one steel sheet pile is squeezed between adjacent prestressing force supporting unit using pile driving equipment, steel sheet pile with
By latching connection between steel sheet pile or prestressing force supporting unit；
Step 4, Guan Liang (2) is set on the top of prestressing force supporting unit, by Guan Liang (2) by all prestressing force supporting units
It is fixed together, all prestressing force supporting units is formed an entirety with Guan Liang (2)；In Guan Liang (2) towards in foundation ditch
The side of the heart sets at least one supporting construction (6)；
Step 5, by prestress application device to presstressed reinforcing steel (4) apply prestressing force, it is ensured that each prestressing force supporting unit
Be anchored in Guan Liang (2) for presstressed reinforcing steel (4) upper end applied after prestressing force by identical pulling force by many presstressed reinforcing steels (4)；
Step 6, excavation of foundation pit is carried out, and the prestressing force of presstressed reinforcing steel (4) is stepped up with the increase of excavation of foundation pit depth；
Step 7, carry out Underground Construction；
Step 8, Underground Construction backfill the earthwork after finishing, the prestressing force of release presstressed reinforcing steel (4) removes supporting construction
(6), Guan Liang (2) and utilization pile pulling device recovery prestressing force supporting unit.
2. the construction method that supporting is carried out using prestress steel sheet pile supporting construction according to claim 1, its feature is existed
In the surface that the stopping means (5) is in contact with presstressed reinforcing steel (4) is arc.
3. the construction method that supporting is carried out using prestress steel sheet pile supporting construction according to claim 1, its feature is existed
In the bridle iron (3) is connected by welding with support pile (1).
4. the construction method that supporting is carried out using prestress steel sheet pile supporting construction according to claim 1, its feature is existed
In the length of the support pile (1) is 15m-30m.
5. the construction method that supporting is carried out using prestress steel sheet pile supporting construction according to claim 1, its feature is existed
In being provided with floor of putting more energy on the web of the H profile steel of the bridle iron (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510619464.5A CN105133623B (en) | 2015-09-25 | 2015-09-25 | A kind of construction method that supporting is carried out using prestress steel sheet pile supporting construction |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510619464.5A CN105133623B (en) | 2015-09-25 | 2015-09-25 | A kind of construction method that supporting is carried out using prestress steel sheet pile supporting construction |
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| Publication Number | Publication Date |
|---|---|
| CN105133623A CN105133623A (en) | 2015-12-09 |
| CN105133623B true CN105133623B (en) | 2017-06-30 |
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| CN201510619464.5A Active CN105133623B (en) | 2015-09-25 | 2015-09-25 | A kind of construction method that supporting is carried out using prestress steel sheet pile supporting construction |
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| CN108222011A (en) * | 2016-12-22 | 2018-06-29 | 上海班升科技有限公司 | The foundation pit supporting method of recoverable prestressed steelframe is set in a kind of hollow support pile |
| CN111456023B (en) * | 2020-03-31 | 2021-05-04 | 江苏东合南岩土科技股份有限公司 | Construction method of underground prestressed supporting structure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1720374A (en) * | 2002-10-07 | 2006-01-11 | 韩万烨 | Innovative prestressed scaffolding system |
| CN1751157A (en) * | 2003-02-14 | 2006-03-22 | 韩万烨 | Prestressed scaffolding system |
| WO2007058463A1 (en) * | 2005-11-16 | 2007-05-24 | Supportec Co., Ltd. | Apparatus for fixing a wale |
| CN103967020A (en) * | 2014-05-28 | 2014-08-06 | 德清鑫德机械有限公司 | Prestress support unit for strip rectangular foundation ditch |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1720374A (en) * | 2002-10-07 | 2006-01-11 | 韩万烨 | Innovative prestressed scaffolding system |
| CN1751157A (en) * | 2003-02-14 | 2006-03-22 | 韩万烨 | Prestressed scaffolding system |
| WO2007058463A1 (en) * | 2005-11-16 | 2007-05-24 | Supportec Co., Ltd. | Apparatus for fixing a wale |
| CN103967020A (en) * | 2014-05-28 | 2014-08-06 | 德清鑫德机械有限公司 | Prestress support unit for strip rectangular foundation ditch |
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