CN102877473A

CN102877473A - Skirt pile and soil coupled slid-resistant structure

Info

Publication number: CN102877473A
Application number: CN2012102423590A
Authority: CN
Inventors: 郑明新; 刘伟宏; 王全才; 李培植; 徐典; 孔祥营
Original assignee: East China Jiaotong University
Current assignee: East China Jiaotong University
Priority date: 2012-07-13
Filing date: 2012-07-13
Publication date: 2013-01-16

Abstract

A skirt pile and soil coupled slid-resistant structure includes a skirt pile slid-resistant structural unit formed through combining a plurality of slid-resistant piles being vertical to the sliding direction and arrayed at a certain distance, wherein a certain distance is kept between the adjacent skirt piles, the skirt piles are arranged to form regular polygons, and the skirt piles anchored in a sliding bed body form a coupled slid-resistant structure with a landslide viscousness soil layer; and the skit piles are solidified and connected through the top beams of closed frames of the regular polygons at the tops, so that a space rigid frame pipe body structure is formed. The skirt pile and soil coupled slid-resistant structure provided by the invention adopts the slid-resistant piles with middle and small pile diameter, as well as the reasonable space arrangement among the piles to form the skirt pile combined structure and obtain rather great flexural rigidity, greatly improves the shear strength of the coupled body, gives full play to the intensity characteristic of rock and soil inside and outside the structure and further improves the integral slid-resistant performance of the coupled structure through the reasonable distance arrangement between the adjacent skirt piles. The skirt pile and soil coupled slid-resistant structure is suitable for small and medium size landslide treatment engineering and post-earthquake emergency treatment engineering.

Description

Skirt piles-native manifold type antiskid structure

Technical field

The present invention relates to a kind of skirt piles for Sliding Plane or potential slide plane-native manifold type antiskid structure, possession matter disaster antiskid technical field.

Background technology

The tradition antislide pile is widely used in the various landslide control engineerings because of advantages such as its reliability and anti-slide performance are strong, and set often heavy in section stake of antislide pile in engineering, construction costs is relatively high, aspect construction technology, traditional antislide pile is generally hand excavated pile, and its construction period is long, often be accompanied by stake bottom application worker in excavation stake hole, constructor's poor stability, heavy in section excavation is relatively large to the disturbance destructiveness of sloping body simultaneously; Aspect engineering design, often stake and on every side Rock And Soil are separated from each other, think that Thrust of Landslide all born by the antislide pile that arranges, thereby carry out that the antiskid internal force calculates and sectional dimension designs, the sectional dimension of design is excessive thus, causes the engineering waste.If can effectively utilize the interaction between stake and the Rock And Soil considers in the design, combination by rational stake, stake can form a coupling body with the soil body and jointly bear external load, will certainly effectively reduce the sectional dimension of antislide pile, effectively reduces construction costs from face.

In emergency work after middle-size and small-size landslide and the shake, there has been potential slide plane, because the construction period that requires is shorter, for the better reduction of erection time, realize mechanization of building operation, adopt skirt piles-native manifold type antiskid structure smelting reason that comes down, each skirt piles should be selected the bored pile in middle paxilla footpath.

Summary of the invention

The objective of the invention is, sectional dimension for traditional anti-slide pile design is large, has ignored the interaction between the stake soil, and construction disturbance is large, the manually digging hole speed of application slowly and the shortcoming such as safe not provides a kind of smelting to manage the comparatively skirt piles of economical rationality-native manifold type antiskid structure of middle-size and small-size landslide.

Solving the problems of the technologies described above the technical scheme that adopts is, skirt piles of the present invention-native manifold type antiskid structure comprises several antislide piles perpendicular to glide direction, the skirt piles antiskid structure unit that combines with certain arranged with interval, keep certain spacing between the adjacent skirt piles, be regular polygon and arrange, the skirt piles that are anchored in the sliding bed body consist of the manifold type antiskid structure with landslide clayey soil layer; Connection is solidified by regular polygon closure frame Guan Liang in the top of each skirt piles, thereby forms a space rigid pile body structure.In an element of construction, guarantee that the adjacent skirt piles center line connecting direction of front and rear row is vertical with glide direction.

Each skirt piles in the antiskid structure of the present invention unit all adopt the stake of machine drilling perfusion concrete, the stake footpath of each skirt piles is generally 400mm～800mm, by laying reinforcing cage, pressure injection cement mortar or fine-stone concrete are built pile body, when stake footpath during at 400mm, can adopt stiffness reinforcement material to replace reinforcing cage, carry out again slip casing by pressure and build pile body.

The stake top connected mode of each skirt piles in the antiskid structure of the present invention unit adopts regular polygon sealing reinforced concrete frame Guan Liang to connect, stake apical cap beam width is 2 times skirt piles stake footpath, Guan Liangzhong is stretched on the stake top of each skirt piles, by steel mesh reinforcement is set, Guan Liang is solidified with each rhizosphere stake be connected.

Coupled structure of the present invention generally is arranged in the middle and lower part of landslide surface, and a domatic platform place is set, and pile body can vertically or tilt to lay, and the stake of imbedding sliding bed (anchoring section) employing 1/3 ~ 2/5 is long, slide plane above (cantilever segment) adopts all to be imbedded in the gliding mass, makes it to become fully buried antiskid structure; For than deep-level landslide, apply certain pretension with prestress anchorage cable to the top in case of necessity.

More the present invention can in a row or arrange in the engineering application process and establish block construction, and adopts the flush type antiskid structure.

The present invention's beneficial effect compared with the prior art is, skirt piles of the present invention-native manifold type antiskid structure, owing to adopting mechanical hole building, lay flexibly the stake position, can greatly shorten construction period, simultaneously to have guaranteed constructor's safety, disturbance destruction to sloping body is little, and the antislide pile in paxilla footpath rationally arranges by the space between each skirt piles in the employing, consist of the skirt piles combining structure, obtained sizable bending rigidity, by the setting of the reasonable distance between adjacent skirt piles, so that the formation coupling effect of skirt piles and inter-pile soil body, greatly improved the shear strength of coupling body, give full play to the strength characteristics of the inside and outside Rock And Soil of structure, thereby improved the whole cling property of coupled structure, also further reduced the sectional dimension in the anti-slide pile design, save Reinforced Concrete Materials and reach more than 40%, thereby so that design more economical rationality.

The present invention is applicable to the improvement engineering of speedily carrying out rescue work after middle-size and small-size landslide and the shake.

Description of drawings

Fig. 1 is the single skirt piles of the present invention-native manifold type antiskid structure layout plan;

Fig. 2 is the single skirt piles of the present invention-native manifold type antiskid structure facade arrangement diagram;

Fig. 3 is the cross-sectional drawing of the interior stirrup of skirt piles in skirt piles of the present invention-native manifold type antiskid structure unit;

Fig. 4 is the cross-sectional drawing of the interior i iron of skirt piles in skirt piles of the present invention-native manifold type antiskid structure unit;

Picture in picture number expression: the 1st, sliding mass; The 2nd, sliding bed; The 3rd, slide plane; The 4th, rear row's skirt piles; The 5th, an apical cap beam; The 6th, front-seat skirt piles; The 7th, middle row's skirt piles; The 8th, come down domatic; The 9th, an apical cap cantilever thickness; The 10th, the structure cantilever segment degree of depth; The 11st, the structure anchor section degree of depth; The 12nd, adjacent skirt piles spacing in the element of construction; The 13rd, an apical cap beam width; The 14th, the spacing between the coupled structure; The 31st, steel bar stress in the skirt piles; The 32nd, stirrup in the skirt piles; The 33rd, concrete in the skirt piles; The 34th, i iron in the skirt piles; The 35th, the connector of each little i iron.

The specific embodiment

The specific embodiment of the present invention as depicted in figs. 1 and 2.

Embodiment 1

The single skirt piles of the embodiment of the invention-native manifold type antiskid structure is reinforced the clayey soil sliding mass.In the present embodiment antiskid structure unit with pile spacing 14, vertically in a row be laid in the sliding mass, the coupled structure unit is then by between each adjacent skirt piles such as rear row's skirt piles 4, middle row's skirt piles 7, front-seat skirt piles 5, adopt skirt piles spacing 12, being hexagon lays, 5 fixed linking to each other of hat beam are adopted on the stake top, the width 13 of hat beam 5 adopts 2 times of skirt piles stake footpaths, thickness 9 adopts 0.6m, the degree of depth that is embedded in sliding bed 2 11 of each skirt piles adopts 1/3 of skirt piles total length, all imbeds in the sliding mass 1 with 9 sections on hat beam at slide plane 3 above part anchoring sections 10.As shown in Figure 3, the skirt piles in the coupled structure all adopt bored pile, and the stake footpath is 500mm, adopt stake all arrangements of

reinforcement

31,32, and all the other are the slip casing by pressure mode and pour into pea gravel concreten.

Embodiment 2

The single skirt piles of the embodiment of the invention-native manifold type antiskid structure is reinforced the clayey soil sliding mass.In the present embodiment antiskid structure unit with pile spacing 14, vertically in a row be laid in the sliding mass, the coupled structure unit is then by between each adjacent skirt piles such as rear row's skirt piles 4, middle row's skirt piles 7, front-seat skirt piles 5, adopt skirt piles spacing 12, being hexagon lays, 5 fixed linking to each other of hat beam are adopted on the stake top, the width 13 of hat beam 5 adopts 2 times of skirt piles stake footpaths, thickness 9 adopts 0.6m, the degree of depth that is embedded in sliding bed 2 11 of each skirt piles adopts 1/3 of skirt piles total length, all imbeds in the sliding mass 1 with 9 sections on hat beam at slide plane 3 above part anchoring sections 10.As shown in Figure 4, the skirt piles in the coupled structure all adopt bored pile, and the stake footpath is 500mm, adopt the connector 35 of the interior i iron 34 of skirt piles and each little i iron, and all the other are the slip casing by pressure mode and pour into pea gravel concreten.

Claims

1. skirt piles-native manifold type antiskid structure, it is characterized in that, described structure comprises by several antislide piles perpendicular to glide direction, the skirt piles antiskid structure unit that combines with certain arranged with interval, keep certain spacing between the adjacent skirt piles, be regular polygon and arrange, the skirt piles that are anchored in the sliding bed body consist of the manifold type antiskid structure with landslide clayey soil layer; Connection is solidified by regular polygon closure frame Guan Liang in the top of each skirt piles, thereby forms a space rigid pile body structure; In same element of construction, should guarantee that the adjacent skirt piles center line connecting direction of front and rear row is vertical with glide direction.

2. a kind of skirt piles according to claim 1-native manifold type antiskid structure, it is characterized in that, described skirt piles all adopt the stake of machine drilling perfusion concrete, the stake footpath of each skirt piles is 400mm～800mm, by laying reinforcing cage, pressure injection cement mortar or fine-stone concrete are built pile body, when stake footpath during at 400mm, can adopt stiffness reinforcement material to replace reinforcing cage, carry out again slip casing by pressure and build pile body.

3. a kind of skirt piles according to claim 1-native manifold type antiskid structure, it is characterized in that, the stake top connected mode of described skirt piles adopts regular polygon sealing reinforced concrete frame Guan Liang to connect, stake apical cap beam width is 2 times skirt piles stake footpath, Guan Liangzhong is stretched on the stake top of each skirt piles, by steel mesh reinforcement is set, Guan Liang is solidified with each rhizosphere stake be connected.

4. a kind of skirt piles according to claim 1-native manifold type antiskid structure, it is characterized in that, described manifold type antiskid structure generally is arranged in the middle and lower part of landslide surface, and a domatic platform place is set, pile body can vertically or tilt to lay, the stake of imbedding sliding bed employing 1/3 ~ 2/5 is long, and the above employing of slide plane is all imbedded in the gliding mass, makes it to become fully buried antiskid structure; For than deep-level landslide, apply certain pretension with prestress anchorage cable to the top in case of necessity.

5. a kind of skirt piles according to claim 1-native manifold type antiskid structure is characterized in that, more described antiskid structure can in a row or arrange in application process and establish block construction, and adopts the flush type antiskid structure.