CN105401585A - Structure for supporting tower crane through foundation pit supporting system and construction method of structure - Google Patents

Structure for supporting tower crane through foundation pit supporting system and construction method of structure Download PDF

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Publication number
CN105401585A
CN105401585A CN201510821116.6A CN201510821116A CN105401585A CN 105401585 A CN105401585 A CN 105401585A CN 201510821116 A CN201510821116 A CN 201510821116A CN 105401585 A CN105401585 A CN 105401585A
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China
Prior art keywords
tower crane
brace summer
lattice column
foundation ditch
support system
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Granted
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CN201510821116.6A
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CN105401585B (en
Inventor
朱健
佘植镔
骆晓亮
向广旭
贺森
蒋里
刘玙江
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China Construction Eighth Engineering Division Co Ltd
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China Construction Eighth Engineering Division Co Ltd
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Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00Excavations; Bordering of excavations; Making embankments
    • E02D17/02Foundation pits
    • E02D17/04Bordering surfacing or stiffening the sides of foundation pits
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00Foundations as substructures
    • E02D27/32Foundations for special purposes
    • E02D27/42Foundations for poles, masts or chimneys
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00Foundations as substructures
    • E02D27/32Foundations for special purposes
    • E02D27/44Foundations for machines, engines or ordnance

Abstract

The invention relates to a structure for supporting a tower crane through a foundation pit supporting system and a construction method of the structure. The structure comprises a supporting beam supported in a foundation pit and used for serving as an installation foundation of the tower crane and the tower crane installed on the supporting beam and used for hoisting operation. By means of the structure and the construction method, the supporting beam in the foundation pit supporting system serves as the installation foundation of the tower crane, formation of a tower crane bearing table by singly constructing a cast-in-place pile is avoided, and the construction cost is saved; and meanwhile, the time for singly constructing the tower crane bearing table is saved, and the time limit for a project is saved.

Description

Utilize structure and the construction method thereof of foundation ditch support system support tower crane
Technical field
The present invention relates to the realm of building construction, refer in particular to a kind of structure and the construction method thereof that utilize foundation ditch support system support tower crane.
Background technology
In existing construction, for the installation of tower crane, usually adopt and make a call to 4 castinplace piles as tower crane bearing platform separately, tower crane is arranged on tower crane bearing platform and carries out lifting operation again.After tower crane operation completes, then the tower crane bearing platform arranged separately is removed.In existing way, need tower crane bearing platform of constructing, the later stage also needs tower crane bearing platform to remove, and make the duration longer, and dismantling operation causes the wasting of resources of material and manpower, cost is higher.
Summary of the invention
The object of the invention is to the defect overcoming prior art, there is provided a kind of structure and the construction method thereof that utilize foundation ditch support system support tower crane, the construction period length, the dismounting cushion cap that solve existence in the construction of existing tower crane cause the problem that material and waste of human resource and cost are higher.
The technical scheme realizing above-mentioned purpose is:
A kind of construction method utilizing foundation ditch support system support tower crane of the present invention, comprising:
In foundation pit construction, the brace summer in construction foundation pit; And
Utilize described brace summer as the installation foundation of tower crane, and described tower crane is installed on described brace summer to carry out lifting operation.
The present invention utilizes the brace summer in foundation ditch support system as the installation foundation of tower crane, avoids construction castinplace pile separately and forms tower crane bearing platform, saved construction cost, also eliminated the time of construction tower crane bearing platform separately simultaneously, saved the duration.And the support system in foundation ditch can be removed after foundation pit construction completes, make the installation foundation using brace summer as tower crane, also have and remove conveniently, without the need to making tower crane bearing platform separately in addition, also the trouble of removing separately tower crane bearing platform is eliminated, save construction cost, saved material and manpower, also shorten the construction period greatly.
The present invention utilizes the further improvement of the construction method of foundation ditch support system support tower crane to be, also comprises:
Lattice column is installed in the bottom of described brace summer;
The lattice column and adjacent lattice column that are positioned at described tower crane place are connected and fixed.
The present invention utilizes the further improvement of the construction method of foundation ditch support system support tower crane to be, is propped up by the lattice column being positioned at tower crane place and is located at immediately below described tower crane.
The present invention utilizes the further improvement of the construction method of foundation ditch support system support tower crane to be, the lattice column interval being positioned at described tower crane place is arranged bridging, is connected and fixed by described bridging and adjacent lattice column.
The present invention utilizes the further improvement of the construction method of foundation ditch support system support tower crane to be, during brace summer in construction foundation pit, arranges the embedded part for installing tower crane, and arrange stiffener in described embedded part place in described brace summer.
Present invention also offers a kind of structure utilizing foundation ditch support system support tower crane, comprising:
Prop up the brace summer be located in foundation ditch, for the installation foundation as tower crane; And
Install on described brace summer, for the tower crane carrying out lifting operation.
The present invention utilizes the further improvement of the structure of foundation ditch support system support tower crane to be, also comprise a lattice column be located at bottom described brace summer, the lattice column and the adjacent lattice column that are positioned at described tower crane place are connected and fixed.
The present invention utilizes the further improvement of the structure of foundation ditch support system support tower crane to be, the lattice column being positioned at described tower crane place props up to be located at immediately below described tower crane.
The present invention utilizes the further improvement of the structure of foundation ditch support system support tower crane to be, the lattice column and the adjacent lattice column support that are positioned at described tower crane place are connected with bridging.
The present invention utilizes the further improvement of the structure of foundation ditch support system support tower crane to be, be embedded with embedded part in described brace summer, described embedded part place is provided with stiffener.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that the present invention utilizes the structure of foundation ditch support system support tower crane.
Fig. 2 is the top view that the present invention utilizes the structure of foundation ditch support system support tower crane.
Fig. 3 is the structural representation that the present invention utilizes lattice column in the structure of foundation ditch support system support tower crane.
Fig. 4 is the reinforcement structure schematic diagram that the present invention utilizes brace summer in the structure of foundation ditch support system support tower crane.
Fig. 5 is the cross-sectional view that the present invention utilizes lattice column in the structure of foundation ditch support system support tower crane.
Fig. 6 is A-A sectional view in Fig. 5.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
The invention provides a kind of structure and the construction method thereof that utilize foundation ditch support system support tower crane; for ensureing material horizontal and the vertical transport in foundation pit construction stage; after the first of foundation ditch supports and trestle has been constructed; utilize the support of first road as the basis of tower crane; tower crane is laid on first road supports; carry out tower crane operation; lattice column is installed bottom the brace summer of foundation ditch; the bottom of lattice column is inserted in stand column pile; brace summer, lattice column and stand column pile belong to the support system of foundation ditch; for the protection of the construction safety of foundation ditch, avoid foundation pit collapse.Present invention utilizes the brace summer of foundation ditch, using the installation foundation of the brace summer of foundation ditch as tower crane, tower crane is installed on brace summer to carry out tower crane operation, this eliminate the construction of tower crane bearing platform, avoid and play 4 tower crane stakes separately, saved cost, also greatly saved the duration.The support system of foundation ditch is after foundation pit construction completes, can remove, utilize brace summer as the installation foundation of tower crane, not only avoid the construction of tower crane bearing platform, also save the dismantling operation of tower crane bearing platform, save the resource such as manpower and material, shorten the construction period, there is good economic benefit.The structure of foundation ditch support system support tower crane and construction method thereof is utilized to be described below in conjunction with accompanying drawing to the present invention.
Consult Fig. 1, show the schematic diagram that the present invention utilizes the structure of foundation ditch support system support tower crane.Below in conjunction with Fig. 1, the structure of foundation ditch support system support tower crane is utilized to be described to the present invention.
As shown in Figure 1, the tower crane 21 that the present invention utilizes the structure of foundation ditch support system support tower crane to comprise brace summer 11 and be arranged on brace summer 11, this brace summer 11 is located in foundation ditch, using the installation foundation of brace summer 11 as tower crane 21.Brace summer 11 is the support system in foundation ditch, in the construction of foundation ditch, for guaranteeing the construction safety of foundation ditch, in the process that foundation ditch excavates, can arrange support system, prevent caving in of foundation ditch between foundation ditch inwall.
Shown in composition graphs 2; foundation ditch in the present invention adopts conventional along way construction; after first brace summer 11 in foundation ditch and trestle 14 have been constructed; utilize this first brace summer 11 as the foundation ditch of tower crane 21; brace summer 11 lays tower crane, to guarantee material horizontal and the vertical transport in foundation pit construction stage.At the sidepiece construction ground-connecting-wall 13 of trestle 14, strengthen the firm of foundation ditch by ground-connecting-wall 13.Tower crane is to the active force of the installation foundation of bottom, mainly contain moment of flexure, vertical force, horizontal force and moment of torsion four parameters, the brace summer of foundation ditch is reinforced concrete structure, there is higher intensity and rigidity, as calculated, this brace summer effectively can bear the active force of tower crane, to guarantee the job safety of tower crane.
Lattice column 12 has been installed in the bottom of brace summer 11, lattice column 12 is for supported beam 11, this lattice column 12 splices downwards along with digging under foundation ditch, when foundation pit construction is to base plate, lattice column 12 is passed through base plate and welds sealing piece at the periphery of lattice column, the bottom of lattice column 12 is plugged in stand column pile, and stand column pile squeezes into the bottom of foundation ditch.Firm bracketing can be played to tower crane 21 by the lattice column 12 arranged bottom brace summer 11.Shown in composition graphs 3, be connected and fixed between the lattice column 12 and adjacent lattice column 12 at tower crane 21 place.Preferably, by bridging 121, support and connection between the lattice column 12 and adjacent lattice column 12 at tower crane 21 place are fixed.
Shown in composition graphs 4, for improving the job safety of tower crane 21 further, the brace summer 11 of the installation foundation as tower crane 21 is reinforced, this deck-molding as the brace summer 11 of tower crane installation foundation is increased to 1500mm, deck-siding adds to 1000mm, concrete strength grade is C30, to strengthen the structural strength of brace summer 11.As calculated, be equipped with top rebars 113, bottom reinforcement bars 114 and both sides reinforcing bar 115 in this brace summer 11, be also provided with four limbs stirrup 111, lacing wire 112, bottom reinforcement bars 114 arranges two rows.Top rebars is wherein 11, and bottom reinforcement bars is 22, and the reinforcing bar of both sides is respectively 12.During reinforcing bar in colligation brace summer 11, need the embedded part for installing tower crane to reserve position, after being placed by embedded part, at embedded part, place arranges stiffener, to guarantee the steadiness of embedded part.
The lattice column 12 being positioned at tower crane 21 place is located at immediately below tower crane 21, utilizes lattice column 12 to carry the pressure of tower crane 21.Shown in composition graphs 5 and Fig. 6, lattice column 12 adopts angle steel and batten plate to be welded, in the circumferentially-spaced of lattice column 12, stiffener 122 is set, stiffener 123 is connected between stiffener 122 and lattice column 12, adopt between stiffener 122 and lattice column 12 and be welded and fixed, stiffener 123 and adopting between stiffener 122 and lattice column 12 is welded and fixed, and the thickness of welding is greater than 10mm.The lattice column 12 be positioned at below tower crane 21 place brace summer 11 welds bridging every 4m to 6.5m with the lattice column of periphery.
For improving the safety of tower crane further, stand column pile bottom the lattice column at tower crane place is deepened, the long usual employing 30m of stake of the stand column pile in foundation ditch support system, and long 40m, the 35m of being respectively of the stake of the stand column pile at tower crane place, the diameter of this stand column pile is 650mm, and top expanding be 800mm.
Below the load of tower crane and the supporting capacity of support system are calculated.
The power that tower crane is transmitted to support mainly contains moment of flexure, vertical force, horizontal force, moment of torsion four parameters, and the height of tower crane 21 is 39.6 meters, calculates load as follows: Mv=2243kN.m (moment of flexure), F h=42kN (vertical force), F v=873kN (horizontal force), Ms=220kN.m (moment of torsion).
Because support system rigidity is larger, horizontal force and moment of torsion can be resisted, therefore eliminate horizontal force and moment of torsion in the calculation, moment of flexure and vertical force is only considered when calculating, unfavorable operating mode force analysis is acted on along eight directions by calculated bending moment, design tower crane size and arrangement of reinforcement, be converted into four concentrated forces by moment of flexure by tower body four angles and be transmitted to brace summer.Eight directions are that diagonal four direction calculates, and utilizes formula F along X-axis, Y-axis four direction v/ 4 ± Mv/2L, is delivered on brace summer by moment of flexure and vertical force along tower body four angles, is equivalent to load input, then calculates size and the arrangement of reinforcement situation of brace summer, finally design the size of stand column pile and lattice column.
The size of brace summer and arrangement of reinforcement situation, as shown in Figure 4, show the reinforcement structure of brace summer, brace summer acts on according to four parameters of loadings and eight directions that the calculating and carrying out of unfavorable operating mode designs, each 12 reinforcing bars 115 of 11 top rebars 113,22 root bottom part reinforcing bar 114 and both sides are equipped with in this brace summer 11, also be provided with four limbs stirrup 111, lacing wire 112, bottom reinforcement bars 114 arranges two rows.Top rebars wherein, bottom reinforcement bars, both sides reinforcing bar all adopt φ 25 reinforcing bar, and stirrup and lacing wire all adopt φ 12 reinforcing bar.Strengthen the deck-molding of brace summer and deck-siding, be specially: the deck-molding of brace summer 11 is increased to 1500mm, and deck-siding adds to 1000mm, concrete strength grade is C30.
Lattice column in brace summer system arranges bridging along shaft interval, by bridging and adjacent lattice column or diaphragm wall support and connection, the interval of lattice column own arranges stiffener and stiffener, and welding procedure should meet the demands, and the thickness of welding is greater than 10mm.
The bearing capacity calculation of the lattice column in support system, as following table:
The bearing capacity calculation of the stand column pile in support system, when stake is long be 40m time, calculating ultimate bearing capacity estimated value is Ra=4067.3KN, and getting safety coefficient K is 2, and Compressive Bearing Capacity design load is 2033.6KN.When stake is long be 35m time, calculating ultimate bearing capacity estimated value is Ra=3556.8KN, and getting safety coefficient K is 2, and Compressive Bearing Capacity design load is 1778.4KN.
As calculated, brace summer in support system, lattice column and stand column pile all can meet the maximum load power of tower crane, utilize brace summer as the installation foundation of tower crane, the use safety of tower crane can be guaranteed, such one side avoids tower crane bearing platform of constructing separately, also eliminates the dismounting work of tower crane bearing platform, can greatly save construction cost, save the construction period, avoid the waste of material and manpower.
In work progress, should be noted that following aspect:
For ensureing location and the verticality of lattice column, require that the deviations that lattice column is combined with stand column pile is not more than 20, perpendicularity deviation is not more than 1/200, and a pile.The perpendicularity deviation of lattice column is not more than 1/200, centre deviation ± 5, lattice column limit and axis being parallel.With the lattice column below soil excavation tower crane must with adjacent lattice column at least both direction weld 28C bridging, every 4.0 ~ 6.5m is arranged together.Lattice column peripherally need weld sealing piece when passing through base plate.Should, as far as possible through going, forbid arbitrarily to cut lattice column angle steel or batten plate when concrete bearing bar or baseplate reinforcing bar run into lattice column.For protection tower crane and control stack axle load carry, tool-type fence is set at tower body periphery 1.5m place.Reserve the neutral gear placing tower crane embedded part during brace summer reinforcing bar binding, embedded part is placed 2 Φ 25 reinforcing bars after laying and is strengthened.
Constructed at the sole plate of foundation ditch, and after reaching design strength, tower crane moved on sole plate, on base plate as the position of tower crane installation foundation carry out thickening and and periphery cushion cap form entirety.
The construction method of foundation ditch support system support tower crane is utilized to be described to the present invention below.
The present invention utilizes the construction method of foundation ditch support system support tower crane to comprise: in foundation pit construction, and the brace summer in construction foundation pit, utilizes this brace summer as the installation foundation of tower crane, and is arranged on by tower crane on brace summer to carry out lifting operation.As shown in Figure 1, in the construction of foundation ditch, along with the support system of excavation construction foundation pit in foundation ditch of foundation ditch, this support system comprises a brace summer 11 be located between foundation ditch inwall, the present invention utilizes this brace summer 11 as the installation foundation of tower crane 21, tower crane 21 is arranged on brace summer 11, to guarantee the lifting operation of tower crane 21.Brace summer 11 is reinforced concrete structure, its structural strength meets the load of tower crane completely, the use safety of tower crane can be guaranteed, utilize brace summer as the installation foundation of tower crane, save the construction of tower crane bearing platform, also avoid the dismounting of later stage tower crane bearing platform simultaneously, save construction cost greatly, shorten the construction period, there is good economic benefit.
Lattice column 12 is installed in the bottom of brace summer 11, lattice column 12 is the steel post adopting angle steel and batten plate to be welded, supporting brace summer 11 by lattice column 12, for guaranteeing the stable of lattice column 12, the lattice column 12 being positioned at tower crane 21 place being connected and fixed with adjacent lattice column.Preferably, be connected and fixed with adjacent lattice column by the lattice column 12 being positioned at tower crane 21 place by bridging, shown in composition graphs 3, this bridging 121 is laid along lattice column 12 interval, bridging 121 support and connection, between two lattice columns 12, play the effect of reinforcing to the lattice column 12 at tower crane place.
For the installation foundation met below tower crane 21 provides firm support, the lattice column 12 being positioned at tower crane 21 place is located at immediately below tower crane 21, lattice column 12 and tower crane 21 are oppositely arranged, and such lattice column 12 can carry the load of tower crane 21 preferably, guarantees supporting & stablizing.
During brace summer 11 in construction foundation pit, for arranging embedded part in the brace summer 11 of the installation foundation as tower crane 21, by embedded part, tower crane 21 is installed, when the reinforcing bar binding of brace summer 11, for embedded part reserves installation position, after placing embedded part, then stiffener is set in embedded part place, to strengthen the sound construction of embedded part, guarantee the steadiness that tower crane 21 is installed.
Foundation ditch support system in the present invention adopts existing conventional pattern foundation pit supporting structure, comprise brace summer, lattice column and stand column pile, brace summer wherein props up is located at foundation ditch inwall, foundation ditch is played to the effect of support, lattice column is erected on the bottom of brace summer, the bottom of lattice column is inserted in stand column pile, and stand column pile is driven into the inside of foundation ditch.The whole support system of foundation ditch is guarantee foundation ditch firm, and avoid the landslide of foundation ditch, after foundation pit construction completes, the support system of this foundation ditch can be removed.Present invention utilizes the installation foundation of the brace summer in foundation ditch support system as tower crane, by brace summer, lattice column and stand column pile support tower crane, guarantee the safety work of tower crane, adopt brace summer as the installation foundation of tower crane, belong to a kind of application newly of brace summer, this avoid as tower crane is constructed separately tower crane bearing platform, also eliminate the dismounting operation of tower crane bearing platform, effectively save construction cost, save the construction period greatly.
In construction, in order to ensure material horizontal and the vertical transport in foundation pit construction stage, after first supports and trestle has been constructed, first road is utilized to support as tower crane, and after below lattice column is reinforced, lay 1 STT153 tower crane, this tower crane is maximum is no more than 39.6m (1+10+1).The STT153 tower crane that trestle place arranges utilizes based on brace summer, and reinforces (deck-molding of brace summer is increased to 1500mm, and deck-siding is 1000mm, and concrete strength grade is C30) brace summer.Lattice column below brace summer welds 28C bridging every 4 ~ 6.5m with the lattice column of periphery with soil excavation.Long process is added to the stand column pile below STT153 tower crane.
The load that the step of STT153 tower crane passes to support is: setting height(from bottom) is 39.6m (saved by 1+10+1 and form), the power that tower crane is transmitted to support mainly contains moment of flexure, vertical force, horizontal force, moment of torsion four parameters, calculating load is as follows: Mv=2243kN.m (moment of flexure), F h=42kN (vertical force), F v=873kN (horizontal force), Ms=220kN.m (moment of torsion).
Because support system rigidity is larger, horizontal force and moment of torsion can be resisted, therefore eliminate horizontal force and moment of torsion in the calculation, moment of flexure and vertical force is only considered when calculating, unfavorable operating mode force analysis is acted on along eight directions by calculated bending moment, design tower crane size and arrangement of reinforcement, be converted into four concentrated forces by moment of flexure by tower body four angles and be transmitted to brace summer.Eight directions are that diagonal four direction calculates, and utilizes formula F along X-axis, Y-axis four direction v/ 4 ± Mv/2L, is delivered on brace summer by moment of flexure and vertical force along tower body four angles, is equivalent to load input, then calculates size and the arrangement of reinforcement situation of brace summer, finally design the size of stand column pile and lattice column.
Brace summer acts on according to four parameters of loadings and eight directions that the calculating and carrying out of unfavorable operating mode designs, show that brace summer 11 is arranged with following arrangement of reinforcement, as shown in Figure 4, in brace summer 11, laying 11 top rebars 113,22 root bottom part reinforcing bars 114 and both sides respectively arrange 12 reinforcing bars 115, also be provided with four limbs stirrup 111, lacing wire 112, bottom reinforcement bars 114 arranges two rows.The reinforcing bar of top rebars wherein, bottom reinforcement bars and both sides all adopts φ 25 reinforcing bar.During reinforcing bar in colligation brace summer 11, need the embedded part for installing tower crane to reserve position, after being placed by embedded part, at embedded part, place arranges stiffener, to guarantee the steadiness of embedded part.The size of brace summer 11 carries out increasing and widening treatment, and the deck-molding of brace summer is increased to 1500mm, and deck-siding is 1000mm, and concrete strength grade is C30.
Shown in composition graphs 5 and Fig. 6, lattice column below tower crane 21 is reinforced, in the circumferentially-spaced of lattice column 12, stiffener 122 is set, stiffener 123 is connected between stiffener 122 and lattice column 12, adopt between stiffener 122 and lattice column 12 and be welded and fixed, stiffener 123 and adopting between stiffener 122 and lattice column 12 is welded and fixed, and the thickness of welding is greater than 10mm.Lattice column below tower crane welds 28C bridging every 4 ~ 6.5m with the lattice column of periphery with soil excavation.
The diameter of stand column pile adopts 650mm (top be connected with lattice column is expanding is 800mm), and stake is long is respectively 40m, 35m.Bearing capacity of single pile result of calculation is as follows: when stake is long be 40m time, calculating ultimate bearing capacity estimated value is Ra=4067.3KN, and getting safety coefficient K is 2, and Compressive Bearing Capacity design load is 2033.6KN.When stake is long be 35m time, calculating ultimate bearing capacity estimated value is Ra=3556.8KN, and getting safety coefficient K is 2, and Compressive Bearing Capacity design load is 1778.4KN
Through above-mentioned calculating, the support system of below enough carries the load of tower crane transmission, enough meets the job safety of tower crane.
Below embodiment is to invention has been detailed description by reference to the accompanying drawings, and those skilled in the art can make many variations example to the present invention according to the above description.Thus, some details in embodiment should not form limitation of the invention, the present invention by the scope that defines using appended claims as protection scope of the present invention.

Claims (10)

1. utilize a construction method for foundation ditch support system support tower crane, it is characterized in that, comprising:
In foundation pit construction, the brace summer in construction foundation pit; And
Utilize described brace summer as the installation foundation of tower crane, and described tower crane is installed on described brace summer to carry out lifting operation.
2. utilize the construction method of foundation ditch support system support tower crane as claimed in claim 1, it is characterized in that, also comprise:
Lattice column is installed in the bottom of described brace summer;
The lattice column and adjacent lattice column that are positioned at described tower crane place are connected and fixed.
3. utilize the construction method of foundation ditch support system support tower crane as claimed in claim 2, it is characterized in that, the lattice column being positioned at tower crane place is propped up and is located at immediately below described tower crane.
4. utilize the construction method of foundation ditch support system support tower crane as claimed in claim 2, it is characterized in that, the lattice column interval being positioned at described tower crane place is arranged bridging, be connected and fixed by described bridging and adjacent lattice column.
5. utilize the construction method of foundation ditch support system support tower crane as claimed in claim 1, it is characterized in that, during brace summer in construction foundation pit, the embedded part for installing tower crane is set in described brace summer, and stiffener is set in described embedded part place.
6. utilize a structure for foundation ditch support system support tower crane, it is characterized in that, comprising:
Prop up the brace summer be located in foundation ditch, for the installation foundation as tower crane; And
Install on described brace summer, for the tower crane carrying out lifting operation.
7. utilize the structure of foundation ditch support system support tower crane as claimed in claim 6, it is characterized in that, also comprise a lattice column be located at bottom described brace summer, the lattice column and the adjacent lattice column that are positioned at described tower crane place are connected and fixed.
8. utilize the structure of foundation ditch support system support tower crane as claimed in claim 7, it is characterized in that, the lattice column being positioned at described tower crane place props up to be located at immediately below described tower crane.
9. utilize the structure of foundation ditch support system support tower crane as claimed in claim 7, it is characterized in that, the lattice column and the adjacent lattice column support that are positioned at described tower crane place are connected with bridging.
10. utilize the structure of foundation ditch support system support tower crane as claimed in claim 6, it is characterized in that, be embedded with embedded part in described brace summer, described embedded part place is provided with stiffener.
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