CN105133674A - Counter-force device for super tonnage blasting platform - Google Patents
Counter-force device for super tonnage blasting platform Download PDFInfo
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Abstract
The invention relates to a counter-force device for a super tonnage blasting platform. The counter-force device comprises a sub-stack blasting platform which is of a cross shape, wherein an intersection of the cross is coincided with the central point of a main tower; the beam ends of main beams of the sub-stack blasting platform are respectively supported by two ends of non-slip cross arms, two ends of stay cables are sequentially and respectively connected with the sub-stack blasting platform and the main tower by virtue of quick connectors, and a plurality of balancing weights are respectively and uniformly arranged on the sub-stack blasting platform. The counter-force device has the beneficial effects that the tonnage can be increased by virtue of each sub-stack, and the expansibility of the tonnage is high; requirements on bearing capacity of foundation soil are low; the platform is high in stability and security; the balancing weights are convenient to mount, each sub-stack can be independently mounted, and a working plane has multiple points, so that the mounting progress is facilitated; the working environment is safe, and detectors do not need to work in a bottom passage of the platform, so that the security of the working environment for personnel is greatly improved; the unit-tonnage construction cost of the platform is low, and each component of the platform is small in size and low in weight, so that the lifting and the transportation are facilitated, the utilization rate of the load weight is high, and the transportation and lifting costs of buttresses can be saved.
Description
Technical field
The present invention relates to construction work Test Technology of Pile Foundation field, particularly relate in a kind of construction work pile detection, for vertical bearing capacity of single pile test provides the device of counter-force.
Background technology
In construction work pile detection, ballasting platform counterforce device is that the one that vertical bearing capacity of single pile test is commonly used loads counterforce device, the tonnage size of ballasting platform counterforce device, directly determines the size of test loaded value.Ballasting platform counterforce device conventional is at present made up of supporting pier, girder, secondary beam, balancing weight etc., and ballast platform for Platform center, is set up, as shown in Figure 1 with pile center's point in scene above foundation pile.Load bang path is: the quality load of balancing weight passes to girder by secondary beam, is applied to pile crown, realizes test objective by jack by load from girder classification.The subject matter that ballasting platform counterforce device conventional at present exists is that attainable preloading tonnage is limited, very difficult more than 30000kN, as platform preloading tonnage will be increased, longer larger girder must be used, and Lifting Capacity in reality and transportation lengths restriction, the girder lengthened making increasing cannot transport building-site to.
Except the crane of routine and haulage vehicle hoisting transportation difficulty, the security risk of super-tonnage putting up platform obviously increases, and therefore sets up the ballast platform reality exploitativeness of super-tonnage rank according to conventional ballast putting up platform mode very low.
And have a large amount of bearing capacity of single pile limiting value in Practical Project more than the engineering pile of 30000kN, wherein, large-section in-situ concrete pile bearing capacity of single pile limiting value reaches 80000kN and can be found everywhere, can effectively be checked for making the engineering pile bearing capacity of super-tonnage, be necessary to design a kind of ballasting platform counterforce device that can complete super-tonnage type test safely, the counterforce device of the ballast platform of this design take 100000kN as target.
Summary of the invention
In order to solve the problems of the prior art, the invention provides a kind of counterforce device of super-tonnage ballast platform.
The present invention realizes like this, this counterforce device a kind of comprises king-tower, point buttress ballast platform, on-slip stull, some quick connectors, some balancing weights and suspension cable, described point of buttress ballast platform is located at described king-tower surrounding with the center of described king-tower, the two ends of described on-slip stull support a point beam-ends for the girder of buttress ballast platform respectively, the two ends of described suspension cable connect described point of buttress ballast platform and king-tower respectively by described quick connector successively, and some described balancing weights are located on described point of buttress ballast platform respectively uniformly.
Further technical scheme of the present invention is: described point of buttress ballast platform comprises some ballast platforms, described ballast platform is even number, described ballast platform is symmetrical arranged centered by described king-tower, described ballast platform comprises girder and some secondary beams, some described secondary beams are vertical on described girder, described girder is provided with anchor strap, and described anchor strap is connected with described suspension cable by quick connector.
Further technical scheme of the present invention is: the length of described girder is 12.65m, and the height of cross section is 0.80m, and width is 0.60m; The described secondary beam at least 80 that described girder is arranged, the length of described secondary beam is 9m, is highly 0.45m, and the height of cross section is 0.40m; Described girder adopts overlap joint to extend.
Further technical scheme of the present invention is: the outside of described king-tower end is provided with projection, and described king-tower is extended by described projection splicing.
Further technical scheme of the present invention is: what described king-tower adopted is concrete filled steel tubular member, described king-tower is longitudinally interval with arc-shaped through-hole, steel strand pass described through hole and steel strand two ends are connected with quick connector respectively, and are connected with described suspension cable by quick connector.
Further technical scheme of the present invention is: described quick connector comprises the second steel strand, the first anchor slab and the second anchor slab, and described first anchor slab connects described second anchor slab by described second steel strand, and described first anchor slab and the second anchor slab are equipped with draw-in groove.
Further technical scheme of the present invention is: described on-slip stull adopts the concrete filled steel tubular member of diameter 40cm or the steel work four directions part of 40cm*40cm.
Further technical scheme of the present invention is: described suspension cable comprises the first steel strand, described first steel strand surface scribbles anticorrosive coat, described anticorrosive coat overcoat has steel pipe socket, and described suspension cable two ends are all with ground tackle locking, and described first steel strand adopt the steel strand composition of 32 bundle 15-7 Φ 5.
Further technical scheme of the present invention is: described counterforce device also comprises sleeper beam, and on the parallel and described girder of described sleeper beam, described sleeper beam, for the two ends of secondary beam described in bolster.
Further technical scheme of the present invention is: described Suo Li distribution system comprises the some punching jack be located in the middle part of described quick connector, described punching jack is located on described first anchor slab and is placed between two described second steel strand, and all punching jack are connected into primary Ioops.
The invention has the beneficial effects as follows: utilize a point buttress preloading to improve tonnage, and tonnage expansibility is strong; Low to ground requirement for bearing capacity; Platform stabilization, safety are high; Balancing weight is easy for installation, and each point of buttress can be installed separately, work plane multiple spot, favourable installation progress; Work circumstances safe, testing staff is without the need in the operation of mesa base passage, and the safety of person works's environment improves greatly; Platform single ton of cost is low, and each scantling of platform is little, lightness, favourable hoisting transportation, and the utilization rate of weight load is high, can save the transport of buttress, lifting cost is used.
Accompanying drawing explanation
Fig. 1 is the counterforce device schematic diagram of ballast platform in prior art.
Fig. 2 is the top view of the counterforce device of the super-tonnage ballast platform that the embodiment of the present invention provides.
Fig. 3 is the sectional view one of the counterforce device of the super-tonnage ballast platform that the embodiment of the present invention provides.
Fig. 4 is the balancing weight that provides of the embodiment of the present invention and the sectional view point piling up neatly ballast platform and suspension cable.
Fig. 5 is the balancing weight that provides of the embodiment of the present invention and the sectional view point piling up neatly ballast platform.
Fig. 6 is the sectional view of the balancing weight that provides of the embodiment of the present invention and secondary beam.
Fig. 7 is the sectional view of king-tower, quick connector and point buttress ballast platform that the embodiment of the present invention provides.
Fig. 8 is the schematic diagram of the quick connector that the embodiment of the present invention provides.
Fig. 9 is the sectional view two of the counterforce device of the super-tonnage ballast platform that the embodiment of the present invention provides.
Figure 10 is the sectional view three of the counterforce device of the super-tonnage ballast platform that the embodiment of the present invention provides.
Reference numeral: 1-first ballast platform 2-second ballast platform 3-the 3rd ballast platform 4-the 4th ballast platform 5-pile center 6-suspension cable 7-on-slip stull 8-king-tower 9-quick connector 10-secondary beam 11-girder 12-balancing weight 14-sleeper beam 15-anchor strap 16-first steel strand 17-anchor slab 18-second steel strand 19-punching jack.
Detailed description of the invention
Fig. 2-10 shows the counterforce device of super-tonnage ballast platform provided by the invention, this counterforce device comprises king-tower 8, divide buttress ballast platform, on-slip stull 7, some quick connectors 9, some balancing weights 12 and suspension cable 6, described point of buttress ballast platform is located at described king-tower 8 surrounding with the center of described king-tower 8, the two ends of described on-slip stull 7 support a point beam-ends for the girder 11 of buttress ballast platform respectively, the two ends of described suspension cable 6 connect described point of buttress ballast platform and king-tower 8 respectively by described quick connector 9 successively, some described balancing weights 12 are located on described point of buttress ballast platform respectively uniformly.Utilize a point buttress preloading to improve tonnage, and tonnage expansibility is strong; Low to ground requirement for bearing capacity; Platform stabilization, safety are high; Balancing weight is easy for installation, and each point of buttress can be installed separately, work plane multiple spot, favourable installation progress; Work circumstances safe, testing staff is without the need in the operation of mesa base passage, and the safety of person works's environment improves greatly; Platform single ton of cost is low, and each scantling of platform is little, lightness, favourable hoisting transportation, and the utilization rate of weight load is high, can save the transport of buttress, lifting cost is used.
Described point of buttress ballast platform comprises some ballast platforms, described ballast platform is even number, described ballast platform is symmetrical arranged centered by described king-tower 8, described ballast platform comprises girder 11 and some secondary beams 10, some described secondary beams 10 are vertical on described girder 11, described girder 11 is provided with anchor strap 15, and described anchor strap 15 is connected with described suspension cable 6 by quick connector 9.
The every root length of described girder 11 is 12.65m, and the height of cross section is 0.80m, and width is 0.60m; The described secondary beam 10 at least 80 that described girder 11 is arranged, the length of described secondary beam 10 is 9m, is highly 0.45m, and the height of cross section is 0.40m, and described girder 11 adopts overlap joint to extend.When girder 11 falls short of, can the many prolongations that overlap, one end end face of described girder 11 is provided with projection, and other end bottom surface is provided with depressed part, and described projection and described depressed part are matched in clearance.
The outside of described king-tower 8 end is provided with projection, and described king-tower 8 is extended by described projection splicing.
What described king-tower 8 adopted is concrete filled steel tubular member, and described king-tower 8 is longitudinally interval with arc-shaped through-hole, and steel strand pass described through hole and steel strand two ends are connected with quick connector 9 respectively, and are connected with described suspension cable 6 by quick connector 9.
Described quick connector 9 comprises the second steel strand 19, first anchor slab 17 and the second anchor slab 17, and described first anchor slab 17 connects described second anchor slab 17 by described second steel strand 19, and described first anchor slab 17 and the second anchor slab 17 are equipped with draw-in groove.
Described on-slip stull 7 adopts the concrete filled steel tubular member of diameter 40cm or the steel work four directions part of 40cm*40cm.
Described suspension cable 6 comprises the first steel strand 16, and described first steel strand 16 surface scribbles anticorrosive coat, and described anticorrosive coat overcoat has steel pipe socket, and described suspension cable two ends are all with ground tackle locking, and described first steel strand 16 adopt the steel strand of 32 bundle 15-7 Φ 5 to form.Described second steel strand 18 adopt the steel strand of 8 bundle 15-7 Φ 5 to form.
Described counterforce device also comprises sleeper beam 14, and on the parallel and described girder 11 of described sleeper beam 14, described sleeper beam 14, for the two ends of secondary beam described in bolster 10.
Described Suo Li distribution system comprises the some punching jack 19 be located in the middle part of described quick connector 9, and described punching jack 19 is located on described first anchor slab 17 and is placed between two described second steel strand 18, and all punching jack 19 are also unified into primary Ioops.
It is conventional list buttress preloading mode is decomposed composition to pile up neatly into even number (as 2 buttress, 4 buttress, 6 buttress that the counterforce device of super-tonnage ballast platform sets up mode, optimum with 4 buttress) individually set up mode, effectively the Load concentration that each point is piled up neatly is got up by the structure of similar cable stayed bridge again, reach the object of super-tonnage rank.Claim this mode of setting up for a point buttress accumulation load method.Ballast platform is respectively the first ballast platform 1, second ballast platform 2, the 3rd ballast platform 3 and the 4th ballast platform 4.
The counterforce device that of the present invention point of buttress accumulation load method sets up ballast platform is made up of king-tower 8, suspension cable 6, girder 11, secondary beam 10, on-slip stull 7, quick connector 9, balancing weight 12.Scene divides buttress to set up ballast platform with pile center 5 point symmetry, with four buttress for excellent, then by suspension cable 6 and king-tower 8, each point of buttress is connected into entity.Load bang path is: on each symmetrical ballast platform, the quality load of balancing weight passes to girder 11 by secondary beam 10, king-tower 8 is delivered to again by suspension cable 6, by some punching jack 19 in parallel, load is applied to pile crown from king-tower 8 classification, realizes test objective.On-slip stull 7 mainly balances the effect of suspension cable 6 horizontal component in the structure; Quick connector 9 starts in the structure fast by suspension cable 6 and king-tower 8, girder 11 connection function.
Attainable tonnage is very big, and tonnage expansibility is strong.Platform tonnage, in order to make full use of secondary beam 10 conventional at present, is set as 100000kN, can carries out the single-pile static loading test that ultimate bearing capacity surpasses 80000kN by the design.As promoted tonnage, the sliceable king-tower 8 that increases can achieve the goal with splicing elongate spine 11, without the need to again changing girder 11 and secondary beam 10 as tradition heap carrying platform.Low to ground requirement for bearing capacity.Point buttress platform of 100000kN, the moment of flexure that 25000kN girder 11 bears is only to the requirement of bearing capacity of foundation soil little, because a point buttress platform directly lands, does not need buttress, do not need reserved pilot passageway space, ground is 2 times that traditional 25000kN piles carrying platform to the Area of bearing of platform.Platform stabilization, safety are high.Point buttress platform of 100000kN, piles carrying platform ratio with traditional 25000kN, and because not needing buttress, a point buttress platform directly lands, and platform and integrally center of gravity reduces about 2m, and stability against overturning is good, and safety is high.Balancing weight 12 is easy for installation.Each point of buttress can be installed separately, work plane multiple spot, favourable installation progress.Work circumstances safe.Testing staff is without the need in the operation of mesa base passage, and the safety of person works's environment improves greatly.Platform single ton of cost is low.Because girder 11 stress is continuous beam, the moment of flexure that girder bears is little, and cross section can reduce greatly than the girder 11 needed for traditional 25000kN; King-tower 8 is compressed member, and adopt concrete filled steel tubular member, steel using amount is little.The each scantling of platform is little, lightness, favourable hoisting transportation.Locality, in traditional accumulation load method, multiplex bearing capacity is 12000kN girder 11, and length is 12m, be highly 1.2m, heavily about 15-17 ton, if want to increase tonnage, depth of beam, length, weight all can increase considerably, and hoisting transportation equipment general on existing market cannot be supporting.Divide the equal lightness of each component of buttress platform, the heaviest king-tower 8 about 15 tons (can be less after merogenesis), the longest component is 12.65m, and existing market Universal hoisting haulage device just can meet transport installation requirement.The utilization rate of weight load is high.Need buttress is installed in tradition accumulation load method, and buttress is cannot participate in test the providing of counter-force at the trial.And point buttress accumulation load method is without buttress, transports all counterweights of marching into the arena and girder 11, secondary beam 10 etc. and all can participate in during test counter-force provides, the transport of buttress can be saved, lifting cost is used.
The working method of cable stayed bridge used for reference by platform, each component selection fully takes into account the service behaviour of material, as made full use of the high-strength load performance of steel core concrete column, with the tension load-carrying properties of prestress wire, the power bang path of structure is succinctly clear and definite, connecting portion stress is simple, safeguards simple.
King-tower 8 is the concrete filled steel tubular member of diameter 1200mm, and cross four direction is arranged symmetrically with quick connector 9.Punching jack 19 as built-in in each connector, connects punching jack 19 oil circuit, can become Suo Li automatic distributor system.
Each suspension cable 6 is made up of the steel strand of 32 bundle 15-7 Φ 5, and epoxy resin is anticorrosion, outer steel pipe cover, and two ends ground tackle locks, regular length.
Per minute piles up neatly a girder 11, totally four.Girder 11 is 12.65m, and cross-sectional height is 80cm, and width is 60cm, and four quick connectors 9 established by every root girder 11.
Secondary beam 10 is conventional 9m length, the beam of 45cm height.A point buttress platform of 100000kN needs 80 secondary beams 10.
The distortion at adjustment each secondary beam 10 two ends of sleeper beam 14 Main Function is even.Conventional secondary beam 10 can be used to replace.
On-slip stull 7 is the concrete filled steel tubular member of diameter 40cm, act as and prevents girder 11 because being subject to horizontal force to pile center 5 direction displacement.
Quick connector 9 is one and holds card structure, and the ground tackle of suspension cable 6 termination is placed into holding clamping in draw-in groove, and suspension cable 6 can be connected fast with king-tower 8, girder 11.
Suo Li automatic distribution system is the system be composed in series by punching jack 19 oil circuit in each Suo Li automatic distributor, plays the effect regulating suspension cable 6 uniform force, and makes the more convenient installation of suspension cable 6.Punching jack 19(is needed altogether the punching jack of 16 650 tons) be arranged on quick connector 9 assigned address, the load that each point is piled up neatly is delivered to punching jack 19 by anchor strap, be delivered to suspension cable 6 by punching jack 19 and be delivered to king-tower 8 again, make and alignment error because each parts exist, initial each Cable stress is also uneven, this species diversity feeds back to the oil circuit of series connection by punching jack 19, finally reaches balance, makes each suspension cable 6 uniform force.
See Fig. 2, first the place of pile foundation surrounding is carried out smooth, the relative elevation between adjustment pile crown and platform ground; Then girder 11, first segment king-tower 8, on-slip stull 7 are installed, then fill gap between girder 11 and ram-jolt with rubble, make macadam end face absolute altitude consistent with girder 11 end face absolute altitude, then secondary beam 10 is evenly placed on above girder 11; Then two-layer counterweight is stacked by region shown in Fig. 9, girder 11 secondary beam is fully fixed, with suspension cable 6, king-tower 8 is connected with girder 11 again, each layer suspension cable 6 symmetrical stretching fastening simultaneously during connection operation, and then second section king-tower 8 lifting is put in place, then by same method suspension cable 8, girder 11 is connected with king-tower 8; Finally the lifting of all balancing weights 12 is put in place and according to shown in Fig. 3, balancing weight 12 to be piled up.The ballast platform of buttress preloading is divided just to set up complete like this.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the counterforce device of a super-tonnage ballast platform, it is characterized in that: this counterforce device comprises king-tower, point buttress ballast platform, on-slip stull, some quick connectors, some balancing weights and suspension cable, described point of buttress ballast platform is located at described king-tower surrounding with the center of described king-tower, the two ends of described on-slip stull support a point beam-ends for the girder of buttress ballast platform respectively, the two ends of described suspension cable connect described point of buttress ballast platform and king-tower respectively by described quick connector successively, and some described balancing weights are located on described point of buttress ballast platform respectively uniformly.
2. counterforce device according to claim 1, it is characterized in that: described point of buttress ballast platform comprises some ballast platforms, described ballast platform is even number, described ballast platform is symmetrical arranged centered by described king-tower, described ballast platform comprises girder and some secondary beams, some described secondary beams are vertical on described girder, and described girder is provided with anchor strap, and described anchor strap is connected with described suspension cable by quick connector.
3. counterforce device according to claim 2, is characterized in that: the length of described girder is 12.65m, and the height of cross section is 0.80m, and width is 0.60m; The described secondary beam at least 80 that described girder is arranged, the length of described secondary beam is 9m, is highly 0.45m, and the height of cross section is 0.40m; Described girder adopts overlap joint to extend.
4. counterforce device according to claim 3, is characterized in that: the outside of described king-tower end is provided with projection, and described king-tower is extended by described projection splicing.
5. counterforce device according to claim 4, it is characterized in that: what described king-tower adopted is concrete filled steel tubular member, described king-tower is longitudinally interval with arc-shaped through-hole, steel strand pass described through hole and steel strand two ends are connected with quick connector respectively, and are connected with described suspension cable by quick connector.
6. counterforce device according to claim 5, it is characterized in that: described quick connector comprises the second steel strand, the first anchor slab and the second anchor slab, described first anchor slab connects described second anchor slab by described second steel strand, and described first anchor slab and the second anchor slab are equipped with draw-in groove.
7. counterforce device according to claim 6, is characterized in that: described on-slip stull adopts the concrete filled steel tubular member of diameter 40cm or the steel work four directions part of 40cm*40cm.
8. counterforce device according to claim 7, it is characterized in that: described suspension cable comprises the first steel strand, described first steel strand surface scribbles anticorrosive coat, described anticorrosive coat overcoat has steel pipe socket, described suspension cable two ends are all with ground tackle locking, and described first steel strand adopt the steel strand composition of 32 bundle 15-7 Φ 5.
9. counterforce device according to claim 8, is characterized in that: described counterforce device also comprises sleeper beam, and on the parallel and described girder of described sleeper beam, described sleeper beam, for the two ends of secondary beam described in bolster.
10. counterforce device according to claim 9, it is characterized in that: described counterforce device also comprises Suo Li distribution system, described Suo Li distribution system comprises the some punching jack be located in the middle part of described quick connector, described punching jack is located on described first anchor slab and is placed between two described second steel strand, and all punching jack are connected into primary Ioops.
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| CN201510638109.2A CN105133674B (en) | 2015-09-30 | 2015-09-30 | A kind of counterforce device of super-tonnage ballast platform |
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| CN201510638109.2A CN105133674B (en) | 2015-09-30 | 2015-09-30 | A kind of counterforce device of super-tonnage ballast platform |
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| CN105951896A (en) * | 2016-06-12 | 2016-09-21 | 苏州中正工程检测有限公司 | Construction foundation-pile static load detection device |
| CN106522287A (en) * | 2016-10-25 | 2017-03-22 | 广西壮族自治区建筑工程质量检测中心 | Side pile vertical bearing capacity detecting method |
| CN107489175A (en) * | 2017-08-11 | 2017-12-19 | 福建省永正工程质量检测有限公司 | A kind of counterforce device girder improved method |
| CN107975077A (en) * | 2017-12-14 | 2018-05-01 | 张宗毅 | A kind of civil engineering Integral Steel based platform static test heap support method |
| CN110864888A (en) * | 2019-11-21 | 2020-03-06 | 长安大学 | Analog loading device and loading method for tunnel lock pin anchor pipe |
| CN110905009A (en) * | 2019-11-22 | 2020-03-24 | 林春伟 | 8500-ton foundation pile static load test ballast platform with auxiliary buttress and construction method |
| CN113338178A (en) * | 2021-06-24 | 2021-09-03 | 中建三局集团有限公司 | Shock insulation support replacing device and construction method thereof |
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| CN115059124A (en) * | 2022-07-13 | 2022-09-16 | 天津市地质工程勘测设计院有限公司 | Compression-resistant static load test device for high-bearing-platform foundation pile in soft soil area and implementation method |
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| CN107489175B (en) * | 2017-08-11 | 2020-02-18 | 福建省永正工程质量检测有限公司 | Method for improving main beam of counterforce device |
| CN107975077A (en) * | 2017-12-14 | 2018-05-01 | 张宗毅 | A kind of civil engineering Integral Steel based platform static test heap support method |
| CN110864888A (en) * | 2019-11-21 | 2020-03-06 | 长安大学 | Analog loading device and loading method for tunnel lock pin anchor pipe |
| CN110864888B (en) * | 2019-11-21 | 2022-02-18 | 长安大学 | Analog loading device and loading method for tunnel lock pin anchor pipe |
| CN110905009A (en) * | 2019-11-22 | 2020-03-24 | 林春伟 | 8500-ton foundation pile static load test ballast platform with auxiliary buttress and construction method |
| CN113338178A (en) * | 2021-06-24 | 2021-09-03 | 中建三局集团有限公司 | Shock insulation support replacing device and construction method thereof |
| CN113338178B (en) * | 2021-06-24 | 2022-05-20 | 中建三局集团有限公司 | Shock insulation support replacing device and construction method thereof |
| CN114703908A (en) * | 2022-03-16 | 2022-07-05 | 中交天津港湾工程研究院有限公司 | Method for carrying out foundation pile static load test by using Bailey truss as buttress |
| CN115059124A (en) * | 2022-07-13 | 2022-09-16 | 天津市地质工程勘测设计院有限公司 | Compression-resistant static load test device for high-bearing-platform foundation pile in soft soil area and implementation method |
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