CN101368388B - Anchor pipe skeleton support method - Google Patents
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- CN101368388B CN101368388B CN 200810211352 CN200810211352A CN101368388B CN 101368388 B CN101368388 B CN 101368388B CN 200810211352 CN200810211352 CN 200810211352 CN 200810211352 A CN200810211352 A CN 200810211352A CN 101368388 B CN101368388 B CN 101368388B
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Abstract
The invention discloses an anchor pipe timber support and a timbering method. The timbering method includes the following steps: (a1) fixing the place on a slope for an anchor pipe timber support and setting aside a place for a construction platform through temporary brushing and filling; and (a2) constructing an anchor pipe timber support on the construction platform, including: (a21) boring a plurality rows of holes on the strong-strength layers with good stability in different angles on the construction platform, (a22) placing reinforcement ribs in the plurality rows of holes, (a23) injecting slurry in the plurality rows of holes in which the reinforcement ribs are placed to form a plurality rows of steel tube piles, and (a24) building a top beam for the timber support at the top partsof the plurality rows of steel tube piles and prearranging anchorage cable holes. The main body of the anchor pipe timber support can be constructed mechanically; the construction is quick, safe and reliable and cannot cause big damage to the environment; the construction plant is small and after the project is finished, the ecology can be recovered. In addition, the whole body of the anchor pipetimber support bears stress, so the anchor pipe timber support is more reasonable in stress strain and is more reliable.
Description
Technical field
The present invention relates to method for reinforcing side slope and device, particularly the method for anchor pipe skeleton and supporting side slope thereof.
Background technology
Often run into problems such as slope soil weakness or slippage in engineering circle, need the side slope soft soil be reinforced, just can make the side slope long-term stability.The common method of the reinforcing side slope soil body has root pile method, anchoring method, and slabstone is piled up method etc.At present, the normal employing of root pile filled method piles such as stone, concrete perfusion, and speed of application is slow, and pile strength is low, can not improve the hydraulic performance of the soil body, and consolidation effect is poor.The anchoring method exists difficulty of construction big, and equipment complexity, engineering cost are quite high, can not improve the shortcomings such as hydraulic performance of the soil body.The slabstone method of piling up is that the effect that a kind of straightforward procedure of only the side slope soil body surface being protected is worked as the soft soil reinforcing can not prevent the invasion of underground water to the soil body.Said method all can not improve the physical and mechanical property and the hydraulic performance of the soil body simultaneously, and consolidation effect has certain limitation.
Summary of the invention
An object of the present invention is to provide a kind of anchor pipe skeleton supporting soil-slope or landslide or rock side slope method utilized.
Another object of the present invention provides a kind of anchor pipe skeleton of implementing supporting soil-slope or landslide or rock side slope method.
According to an aspect of the present invention, anchor pipe skeleton supporting side slope method provided by the invention may further comprise the steps:
(a1) by interim brush side and embankment, the construction working platform is reserved in laying anchor pipe skeleton position on domatic;
(a2) anchor pipe skeleton of constructing on described construction working platform comprises:
(a21) on described construction working platform, bore many rounds hole down to the strong preferably bearing stratum of stability respectively by different angles;
(a22) in many rounds hole of being bored, place the reinforcement body;
(a23) slip casting in many rounds hole of placing the reinforcement body is to form many row's steel pipe piles;
(a24) make up the framework back timber at the top of described many row's steel pipe piles.
Wherein, for the stratum that has bad phenomenon such as the hole of collapsing, shrinkage cavity to take place, in described step (a21), adopt temporary casing follow-up mode to hole to the strong preferably bearing stratum of autostability.
Wherein, described slip casting is finished in described sleeve pipe extraction, wherein adopts the grouting pressure of 0.5～1MPa to carry out slip casing by pressure or carry out gravity slip casting under the deadweight effect by sleeve pipe.
Said method of the present invention is further comprising the steps of:
After forming many row's steel pipe piles, carry out anchor cable boring, mortar depositing construction forming anchor cable, and when making up described framework back timber, reserve the anchor cable hole; And
By the anchor cable hole of reserving anchor cable is carried out stretching construction, after stretch-draw is finished, by anchor head with anchorage cable anchoring on the side of framework back timber.
Wherein, by the construction technology of cutting, formwork, placement reinforcing cage, concreting, make up the framework back timber at the steel pipe pile top; Perhaps weld or mechanical connection, make up the framework back timber at the steel pipe pile top by reinforcement body and steel structure girder in the steel pipe pile.
Wherein, when the many covers of laying anchor pipe skeleton, the foot anchor pipe skeleton of constructing earlier, the top anchor pipe skeleton of constructing then, anchor pipe skeleton in the middle of constructing at last.
According to a second aspect of the invention, implementing above-mentioned anchor pipe skeleton comprises:
Many row's steel pipe piles, the strong bearing stratum that the slope sliding band enters the sliding mass bottom is passed in described steel pipe pile bottom;
With the described framework back timbers that the steel pipe piles top connects as one of arranging more;
Wherein, at least two row's steel pipe piles in described many row's steel pipe piles are arranged by the wide-angle tilt mode.
Anchor pipe skeleton of the present invention also comprises the anchor cable that connects described framework back timber, and the head of described anchor cable passes described framework back timber and is fixed on the outside of described framework back timber.
Wherein, described lattice back timber is the concrete back timber, set reinforcement body and main muscle welding in the steel pipe pile as the reinforced concrete beam of framework back timber, this moment described steel pipe pile reinforcement body the length h=2～3d of embedding lattice back timber, wherein d is steel pipe pile stake footpath; Perhaps
Described lattice back timber is a steel structure girder, set steel pipe and steel structure girder welding or mechanical connection as the framework back timber in the steel pipe pile.
Wherein, described anchor cable and horizontal angle β be less than described steel pipe pile and horizontal angle α, and satisfy β＜α≤90 °.
The present invention compares with heavy retaining structure with large-scale antiskid structure, the mechanized construction of anchor pipe skeleton major project, quick construction and process are safer reliable, can not cause than havoc environment in the little and work progress in its construction plant, after the engineering completion, can restore ecology.
In addition, the present invention compares with anchor cable ground girder construction, has effectively overcome the structure autostability is poor, strength ratio does not wait and the counter-force structure construction causes duration problem such as delay.The anchor pipe skeleton structural entity is stressed, and it is stressed more reasonable and reliability is stronger.
The present invention is described in detail below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 is the schematic diagram of first kind of form of I type anchor pipe skeleton of the present invention;
Fig. 2 is the schematic diagram of second kind of form of I type anchor pipe skeleton of the present invention;
The schematic diagram of Fig. 3 II type of the present invention anchor pipe skeleton;
Fig. 4 a is the slope reinforcement profile of anchor pipe skeleton supporting soil-slope of the present invention;
Fig. 4 b is the slope reinforcement plan view of anchor pipe skeleton supporting soil-slope of the present invention;
Fig. 5 a is the slope reinforcement profile on anchor pipe skeleton supporting of the present invention landslide;
Fig. 5 b is the slope reinforcement plan view on anchor pipe skeleton supporting of the present invention landslide;
Fig. 6 a is that employing one cover anchor pipe skeleton of the present invention is administered the landslide end view;
Fig. 6 b is the plan view that employing one cover anchor pipe skeleton of the present invention is administered the landslide;
Fig. 7 a is the profile that anchor pipe skeleton of the present invention is reinforced rock side slope;
Fig. 7 b is the schematic diagram that anchor pipe skeleton of the present invention is reinforced the steel framework back timber of rock side slope;
Fig. 7 c is the schematic diagram that anchor pipe skeleton of the present invention is reinforced the concrete cast-in-situ back timber of rock side slope.
The specific embodiment
Anchor pipe skeleton of the present invention is a kind of novel slope reinforcement structure based on prestress anchorage cable, steel pipe pile and Vierendeel girder exploitation, structure is made up of prestress anchorage cable, steel pipe pile and framework back timber, prestress anchorage cable and steel pipe pile are the mechanization drilling construction, the framework back timber is precast splice type or cast in situs formula, structure construction is convenient, and construction is little to the disturbance of surrounding buildings thing; Construction requires low to site condition, headroom, be applicable to any soil layer condition, is particularly useful for following engineering:
1) highway, the permanent stabilization works of railway slope or landslide control engineering;
2) building foundation pit slope support engineering.The anchor pipe skeleton construction is little to the nearby buildings disturbing influence, and noise is little, is suitable for municipal construction, compare with the foundation pit supporting construction of routine such as soil nailing etc., its bearing capacity height, autostability is good, according to the place geological conditions, can use separately, also can wait the associating use with whitewashing;
3) roadbed (highway, railway) is protected temporary lining engineerings such as leading to, speedily carry out rescue work.The anchor pipe skeleton major project is Fully-mechanized construction, fast effectively, and does not almost have earth and stone digging, has overcome logical, the characteristics such as the emergency work duration is tight, execution conditions difference of protecting preferably.
Anchor pipe skeleton be a kind of be the novel slope reinforcement structure of carrier with prestress anchorage cable and steel pipe pile, according to the design external load size, anchor pipe skeleton be divided into is not with anchor cable structure and the band anchor cable structure, thereby anchor pipe skeleton is divided into I type and II type.Comprehensive available research achievements, the research reality of integration project, the composition and the implication of proposition anchor pipe skeleton:
1. " anchor " in the anchor pipe skeleton refers to prestress anchorage cable
Prestress anchorage cable is a kind of tension member, and one end and engineering structure connect, and the other end is anchored in the stable soil layer or rock stratum, and prestress anchorage cable applies anchored force by engineering structure to geotechnical body, utilizes the anchored force on stratum to keep the stable of works.
2. " pipe " in the anchor pipe skeleton refers to steel pipe pile
Steel pipe pile in the anchor pipe skeleton is the steel pipe pile of broad sense, is generally the small diameter hole castinplace pile of aperture less than 300mm, and the reinforcement body can be thought steel pipe in the stake, also can be reinforcing bar and rail etc.; Steel pipe pile is a drilling construction, arranges in groups, and different with antislide pile on the traditional sense is that according to the type and the scale of disease body, its layout can be vertical or wide-angle tilt;
2. " framework " in the anchor pipe skeleton refers to the framework back timber
The framework back timber can be normal concrete beams, reinforced concrete beam and steel work (steel pipe etc.) beam.If the reinforced concrete cast-in-situ beam needs main muscle welding in square up crotch and the framework back timbers such as main muscle in the steel pipe pile; If steel structure girder often welds steel pipe in itself and the steel pipe pile etc. or mechanical connection.It should be noted that use the anchor pipe skeleton reinforcing side slope, the framework back timber should embed domatic, after the engineering completion, can restore ecology.
Compare with heavy retaining structure with large-scale antiskid structure, the mechanized construction of anchor pipe skeleton major project, quick construction and process are safer reliable, can not cause than havoc environment in the little and work progress in its construction plant, after the engineering completion, can restore ecology; Compare with anchor cable ground girder construction, it has effectively overcome the structure autostability is poor, strength ratio does not wait and the counter-force structure construction causes duration problem such as delay.The anchor pipe skeleton structural entity is stressed, and it is stressed more reasonable and reliability is stronger.
Anchor pipe skeleton supporting side slope method of the present invention comprises as Fig. 4 a and Fig. 4 b, Fig. 5 a and Fig. 5 b, anchor pipe skeleton supporting soil-slope or landslide method shown in Figure 6, and the method for anchor pipe skeleton supporting rock side slope shown in Fig. 7 a, Fig. 7 b and Fig. 7 c.
In general, anchor pipe skeleton supporting side slope method of the present invention may further comprise the steps
(a1) by interim brush side and embankment, the construction working platform is reserved in laying anchor pipe skeleton position on domatic;
(a2) anchor pipe skeleton of constructing on described construction working platform comprises:
(a21) on described construction working platform, bore many rounds hole down to the strong preferably bearing stratum of stability respectively by different angles;
(a22) in many rounds hole of being bored, place the reinforcement body;
(a23) slip casting in many rounds hole of placing the reinforcement body to form many row's steel pipe piles 1, for example forms two row's steel pipe piles 1 in Fig. 4 a, Fig. 4 b, form three row's steel pipe piles 1 among Fig. 5 a, Fig. 5 b, forms three row's steel pipe piles 1 among Fig. 7 a, Fig. 7 b and Fig. 7 c;
(a24) make up framework back timber (2) at the top of described many row's steel pipe piles.
For the stratum that has bad phenomenon such as the hole of collapsing, shrinkage cavity to take place, in step (a21), adopt temporary casing follow-up mode to hole to the strong preferably bearing stratum of autostability.At this moment, in described sleeve pipe extraction, finish slip casting, promptly adopt the grouting pressure of 0.5～1MPa to carry out slip casing by pressure or under the deadweight effect, carry out gravity slip casting by sleeve pipe.Slurry described here can be concrete grout or similar item.
When anchor pipe skeleton supporting soil-slope or landslide, should be after forming many row's steel pipe piles, carry out anchor cable boring, mortar depositing construction to form anchor cable 3, and when making up described framework back timber, reserve the anchor cable hole, by the anchor cable hole of reserving anchor cable is carried out stretching construction then, after stretch-draw was finished, the anchor head 31 of anchor cable was fixed on the side of framework back timber 2, as Fig. 3 and shown in Figure 6.
Making up framework back timber 2 can finish by following dual mode at the steel pipe pile top: 1) cutting, formwork, placement reinforcing cage, concreting then; Perhaps 2) reinforcement body and steel structure girder in the steel pipe pile are welded or mechanical connection, shown in Fig. 7 b-c.
When must be when laying many cover anchor pipe skeletons and come the supporting side slope, the foot anchor pipe skeleton of should constructing earlier, the top anchor pipe skeleton of constructing then, anchor pipe skeleton in the middle of the construction at last.
The anchor pipe skeleton of enforcement said method of the present invention comprises as shown in Figure 1 to Figure 3:
As Fig. 1, Fig. 2, many rows steel pipe pile 1 shown in Figure 4, the strong bearing stratum 5 that slope sliding band 4 enters the sliding mass bottom is passed in these steel pipe pile 1 bottoms, the strong rock-soil layer shown in Fig. 4 a;
The framework back timbers 2 that connect as one with described many row's steel pipe piles 1 top are as Fig. 1, concrete or reinforced concrete beam shown in Figure 3, steel structure girder perhaps shown in Figure 2;
Wherein, at least two in described many row's steel pipe piles 1 are arranged steel pipe piles and are arranged by the wide-angle tilt mode, as shown in Figure 1 to Figure 3.
Anchor pipe skeleton of the present invention also comprises the anchor cable 3 that connects described framework back timber 1, and the outside (as shown in Figure 3) that described framework back timber 1 is fixed on framework back timber 1 is passed at the top of described anchor cable 3.
Described lattice back timber 1 is the concrete back timber, the length h=2～3d of the embedding lattice back timber of reinforcement body in the set reinforcement body and main muscle welding in the steel pipe pile 1, this moment described steel pipe pile 1 as the reinforced concrete beam of framework back timber, and wherein d is steel pipe pile stake footpath;
Perhaps described lattice back timber 1 is a steel structure girder, set steel pipe and steel structure girder welding or mechanical connection as the framework back timber in the steel pipe pile 1.
Describe the structure of anchor pipe skeleton of the present invention and the method for supporting side slope with reference to the accompanying drawings in detail.1, the form of structure of anchor pipe skeleton
According to the size of design external load, anchor pipe skeleton can be designed as is not with anchor cable structure (I type) and band anchor cable structure (II type), is the form of fracture of anchor pipe skeleton as Fig. 1～3.
Fig. 1 is the cross-section structure of I type anchor pipe skeleton (form one), in this structure, steel pipe pile is " A " shape and arranges, the framework back timber is arranged as one along vertical glide direction, adopts the integral cast-in-situ formula, is characterized in that the steel pipe pile arrangement form is flexible, the structure autostability is good, external force effect distortion down is little, and the structure anti-bending strength is better, relatively is suitable for the supporting of general soil-slope.
In Fig. 1, steel pipe pile embeds back timber degree of depth h=2～3d, and wherein d is the diameter of steel pipe pile; The height H of back timber=0.5～1m, width L=1～2m; Steel pipe pile 1 and horizontal angle α≤90 °.
Fig. 2 is the cross-section structure of I type anchor pipe skeleton (form two), this structure is used for slope retaining, be equivalent to the structural framing in the ground, steel pipe pile top framework back timber can also can be the pre-manufactured steel structure for Cast-in-situs type, the bricklaying of framework back timber is little, and flexible arrangement, and the structure shear behavior is good, be more suitable for the supporting in rock side slope, also can combine with technologies such as slip castings is used for pattern foundation pit supporting structure.
In Fig. 2, back timber can be the steel framework; Steel pipe pile 1 and horizontal angle α≤90 °.
Fig. 3 is the cross-section structure of II type anchor pipe skeleton, owing to introduced prestressed structure-prestress anchorage cable, structure can be born bigger external load, so can be used for the bigger situations of external load such as large-scale slope reinforcement engineering and landslide control.Steel pipe pile is " A " shape and arranges that the framework back timber is cast-in-place monolithic, and it is stressed that steel pipe pile and anchor cable are united, and compares with anchor cable ground girder construction, has overcome ratio of rigidity preferably and has not waited, is out of shape problems such as inharmonious, and it is stressed more reasonable and reliability is stronger.
In Fig. 3, steel pipe pile embeds back timber degree of depth h=2～3d, and wherein d is the diameter of steel pipe pile; The height H of back timber=〉=1m, width L=〉=2m; Steel pipe pile 1 and horizontal angle α≤90 °; Anchor cable 3 and horizontal angle β≤35 °; And satisfy β≤α≤90 relational expressions.
2, anchor pipe skeleton supporting method
The supporting method of anchor pipe skeleton mainly refers to the selection of anchor tube frame structures form under the different geological conditionss, the method for designing and the job practices of different structure form anchor pipe skeleton.
2.1 anchor pipe skeleton supporting soil-slope or landslide method
For soil-slope or joints development, broken rock side slope and landslide worker point that rate of decay is strong, the sloping body strength of materials is low, yielding, when adopting the anchor pipe skeleton supporting, the bending resistance of anchor pipe skeleton is had relatively high expectations.According to the size of external load, commonly used as Fig. 4 a-b, II type anchor pipe skeleton carries out the supporting on soil-slope or landslide shown in the I type anchor pipe skeleton (form one) shown in Fig. 5 a-b and Fig. 6 a-b.
When adopting anchor pipe skeleton to carry out supporting, anchor pipe skeleton often is laid in the middle part of sloping body.For general soil-slope or middle-size and small-size landslide, can adopt Fig. 4 a-b, I type anchor pipe skeleton (form one) shown in Fig. 5 a-b carries out supporting, when external load is big, should select the II type anchor pipe skeleton (as shown in Figure 6) of band prestress anchorage cable for use, when adopting a cover anchor pipe skeleton to be not enough to guarantee sloping body resistance to overturning, should lay two covers or the above anchor pipe skeleton of two covers as required.
In Fig. 4 a, label 4 is meant interim slide plane; Label 5 is meant strong rock-soil layer, promptly strong bearing stratum; Label 6 is meant stablizes sloping body; Label 7 is meant the excavation margin line.In the anchor pipe skeleton shown in Fig. 4 a-b, have the steel pipe pile 1 that two rows arrange by the wide-angle tilt mode.
After anchoring frame structures form is selected, just can carry out the engineering design of anchor pipe skeleton in conjunction with the engineering geological conditions of sloping body.For II type anchor pipe skeleton, should set the added prestressing force of anchor cable earlier, carry out the drag design of steel pipe pile then, carry out the structure design of framework back timber at last; And for I type anchor pipe skeleton (form one), owing to do not contain anchor cable structure, so need not to carry out the structure design of anchor cable.Adopt the method for designing on anchor pipe skeleton supporting soil-slope or landslide to be summarized as follows:
(1) estimates the feasibility that adopts the anchor pipe skeleton scheme;
(2) clear and definite designing requirement and extraneous restrictive condition;
(3) analyze geologic information;
(4) side slope under the current nature is carried out estimation of stability;
(5) determine sliding force under the design safety factor
● the anchor pipe skeleton installation position is chosen;
● the supposition anchor pipe skeleton is the safety factor calculating that rigid model carries out side slope, and tries to achieve under the design safety factor sliding force that anchor pipe skeleton is suffered;
● to lay the anchor pipe skeleton position is the boundary, carries out the local stability of slope, upper and lower body and calculates;
(6), determine that the worker puts stratum adhesion strength parameter according to pull-out test;
(7) determine prestress value that anchor cable adds, calculate anchoring section length (for II type anchor pipe skeleton);
(8) the steel pipe pile cross section is chosen;
(9) the long estimation of steel pipe pile stake;
(10) single vertical steel pipe pile shear-carrying capacity calculates;
(11) single vertical steel pipe pile anti-bending bearing capacity calculates;
(12) the anchor pipe skeleton shear-carrying capacity calculates
● choosing of oblique steel pipe pile inclination angle;
● single oblique steel pipe pile shear-carrying capacity calculates;
● the total shear-carrying capacity of anchor pipe skeleton calculates;
(13) calculating of the horizontal minimum spacing of steel pipe pile;
(14) structure design of framework back timber
● framework back timber sectional dimension is chosen;
● framework back timber inner forces calculation and design of reinforcement;
In when construction, follow following thinking: the foot anchor pipe skeleton is construction earlier, top secondly, middle last construction.For the construction of the II type anchor pipe skeleton that contains anchor cable structure, construction steel pipe pile earlier, the anchor cable of constructing then, concrete grammar is as follows:
(1) before the construction, the accurate setting-out in position of steel pipe pile, anchor cable and framework back timber in the design anchoring framework for on-the-spot and different design place, should should be as the criterion with the scene and adjust design.
(2) carry out levelling of the land,, on domatic, lay the construction working platform that 3～5m is reserved at the anchor pipe skeleton position by interim brush side and embankment;
(3) cover thicker accumulation horizon because gliding mass top, so during the construction steel pipe pile, should adopt covering layer to creep into method, to the stratum that has bad phenomenon such as the hole of collapsing, shrinkage cavity to take place, the method that should adopt the temporary casing follow-up is to autostability bearing stratum by force preferably.
(4) after boring is finished, place the reinforcement body, steel pipe pile reinforcement body can be reinforcing bar, steel pipe or waste and old steel rail;
(5) in the sleeve pipe extraction, adopt the grouting pressure of 0.5～1MPa to carry out slip casing by pressure, should avoid during slip casting all ground of stake are ftractureed under hydraulic action, in addition, in the sleeve pipe extraction, should keep sealing as far as possible around the sleeve pipe by sleeve pipe; Whole slip casting process was finished the same day.
(6) after the steel pipe pile construction is finished, carry out anchor cable boring, mortar depositing construction, its work progress is identical with traditional construction prestressed cable process.
(7) the framework back timber adopts cast-in-place mode, and the position of anchor cable is arranged, and reserve the anchor cable hole on beam, Deng the maintenance of framework back timber to design strength, by the anchor cable hole of reserving anchor cable is carried out stretching construction, after stretch-draw is finished, the anchor cable body is anchored on the side of framework back timber by anchor head.
2.2 anchor pipe skeleton supporting rock side slope method
For rock side slope, rock itself often has integrality and higher-strength preferably, its deformation failure often is subjected to potential slide plane 4 controls (shown in Fig. 7 a) such as weak intercalated layer, the anchor pipe skeleton supporting should select for use the anchor pipe skeleton of I type shown in Fig. 7 a-c (form two) to reinforce mainly to improve the shear resistance of potential slide plane 4.
When adopting anchor pipe skeleton to carry out the rock side slope supporting, steel pipe pile top framework back timber can be steel frame girder (shown in Fig. 7 b) or cast-in-situ concrete beam (shown in Fig. 7 c), when being cast-in-situ concrete beam, steel pipe pile should satisfy the embedded length of 2～3d (d is the stake footpath); When being steel work, back timber should weld or mechanical connection with reinforcement body in the steel pipe pile, and with the strength of materials that satisfies joint and the holistic resistant behavior that improves structure, after construction was finished, the framework back timber should not be above the ground level.
Adopt I type anchor pipe skeleton (form two) to carry out the supporting of rock side slope, structure can be considered the frame construction in the ground, and method for designing is summarized as follows:
(1) estimates the feasibility that adopts the anchor pipe skeleton scheme;
(2) clear and definite designing requirement and extraneous restrictive condition;
(3) control of each structural plane concerns in the sloping body of analysis, determines the failure mode of sloping body;
(4) side slope under the current nature is carried out estimation of stability;
(5) determine sliding force under the design safety factor
● the anchor pipe skeleton installation position is chosen;
● the supposition anchor pipe skeleton is the safety factor calculating that rigid model carries out side slope, and tries to achieve under the design safety factor sliding force that anchor pipe skeleton is suffered;
● to lay the anchor pipe skeleton position is the boundary, carries out the local stability of slope, upper and lower body and calculates;
(6), determine that the worker puts stratum adhesion strength parameter according to pull-out test;
(7) steel pipe pile cross section and framework back timber form chooses;
(8) the long estimation of steel pipe pile stake;
(9) single vertical steel pipe pile bending resistance and shear-carrying capacity calculate;
(10) single taper pile bearing capacity calculation
● choosing of oblique steel pipe pile inclination angle;
● single oblique steel pipe pile bending resistance and shear-carrying capacity calculate;
(11) inner forces calculation of frame structure system;
(13) carrying out single steel pipe pile allowable bearing according to the inner forces calculation result checks;
(14) design of reinforcement of framework back timber.
In when construction, still follow following thinking: the foot anchor pipe skeleton is construction earlier, top secondly, middle last construction.Method is as follows:
(1) before the construction, the accurate setting-out in position of steel pipe pile, anchor cable and framework back timber in the design anchoring framework for on-the-spot and different design place, should should be as the criterion with the scene and adjust design.
(2) carry out levelling of the land,, on domatic, lay the construction working platform that 3～5m is reserved at the anchor pipe skeleton position by interim brush side and embankment;
(3) select drilling method according to formation condition, when top covers thicker accumulation horizon, should adopt sleeve pipe follow-up drilling technology, when the rock mass integrality is better, can adopts bore hole to creep into and be drilled into the design hole depth.
(4) after boring is finished, place the reinforcement body, steel pipe pile reinforcement body can be reinforcing bar, steel pipe or waste and old steel rail;
(5) under action of gravity with cement mortar or neat cement paste injection hole, whole slip casting process was finished the same day, need mend slurry in case of necessity.
When (6) the framework back timber is cast-in-place beam, adopt the construction technology of cutting, formwork, placement reinforcing cage, concreting; When being steel work, reinforcement body in the steel pipe pile and framework back timber are welded or mechanical connection.
Although above the present invention is had been described in detail, the invention is not restricted to this, those skilled in the art of the present technique can carry out various modifications according to principle of the present invention.Therefore, all modifications of doing according to the principle of the invention all should be understood to fall into protection scope of the present invention.
Claims (5)
1. anchor pipe skeleton supporting side slope method may further comprise the steps:
By interim brush side and embankment, the construction working platform is reserved in the laying anchor pipe skeleton position on domatic;
The anchor pipe skeleton of constructing on described construction working platform comprises:
On described construction working platform, bore many rounds hole down to the strong preferably bearing stratum of stability respectively by different angles;
In many rounds hole of being bored, place the reinforcement body;
Slip casting in many rounds hole of placing the reinforcement body is to form many row's steel pipe piles (1);
After forming described many row's steel pipe piles, carry out anchor cable boring, mortar depositing construction to form anchor cable (3);
Top at described many row's steel pipe piles makes up framework back timber (2), and reserves the anchor cable hole at described framework back timber; And
By the anchor cable hole of reserving anchor cable is carried out stretching construction, after stretch-draw is finished, anchor cable (3) is anchored on the side of framework back timber (2) by anchor head (31);
Wherein, framework back timber (2) is reinforced concrete beam or steel structure girder, the interior set reinforcement body of steel pipe pile (1) and the main muscle welding of reinforced concrete beam, and perhaps set reinforcement body and steel structure girder welds or mechanical connection in the steel pipe pile (1);
Wherein, at least two row's steel pipe piles (1) in described many row's steel pipe piles (1) are arranged by the wide-angle tilt mode;
Wherein, the described steel pipe pile of arranging by the wide-angle tilt mode (1) is A shape layout.
2. method according to claim 1 wherein, by the construction technology of cutting, formwork, placement reinforcing cage, concreting, makes up framework back timber (2) at the steel pipe pile top.
3. method according to claim 2, wherein when laying many cover anchor pipe skeletons, construction foot anchor pipe skeleton earlier, the top anchor pipe skeleton of constructing then, anchor pipe skeleton in the middle of the construction at last.
4. method according to claim 1, wherein:
For described reinforced concrete beam, the length h=2～3d of the embedding framework back timber of the interior reinforcement body of described steel pipe pile (1), wherein d is steel pipe pile stake footpath.
5. method according to claim 4, wherein, described anchor cable (3) and horizontal angle β be less than described steel pipe pile (1) and horizontal angle α, and satisfy β＜α≤90 °.
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| CN 200810211352 CN101368388B (en) | 2008-09-23 | 2008-09-23 | Anchor pipe skeleton support method |
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| CN101368388B true CN101368388B (en) | 2011-01-12 |
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|---|---|---|---|---|
| CN103410156B (en) * | 2013-08-28 | 2016-01-27 | 上海岩土工程勘察设计研究院有限公司 | Support space enclosing structure and application process thereof before a kind of recyclable vertical type steel pipe |
| CN103410157B (en) * | 2013-08-28 | 2016-02-17 | 上海岩土工程勘察设计研究院有限公司 | A kind of soft soil foundation pit that is used for puts the recyclable steel space enclosing structure of slope formula and application process thereof |
| CN103993607B (en) * | 2013-09-23 | 2015-11-25 | 张玉芳 | Steel floral tube controls slip casting antiskid composite construction and rapid constructing method thereof |
| CN110004943A (en) * | 2019-03-27 | 2019-07-12 | 河海大学 | Forced miniature steel pipe pile-anchor cable joint soil-slope supporting construction and construction method |
| CN115262598B (en) * | 2022-07-18 | 2024-02-23 | 中铁广州工程局集团有限公司 | Construction method of water-rich round conglomerate rock stratum lock catch steel pipe pile cofferdam |
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2008
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